diff --git a/Jared.xcodeproj/project.pbxproj b/Jared.xcodeproj/project.pbxproj
index 137c58a..309ae88 100644
--- a/Jared.xcodeproj/project.pbxproj
+++ b/Jared.xcodeproj/project.pbxproj
@@ -7,6 +7,7 @@
 	objects = {
 
 /* Begin PBXBuildFile section */
+		00FC0A452FD8C8D0FCDA16D4 /* Pods_Jared.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 4589B5638BC576CC8AB2700A /* Pods_Jared.framework */; };
 		1D6188C0EEA4AA406C15CC9E /* Pods_Jared.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 4589B5638BC576CC8AB2700A /* Pods_Jared.framework */; };
 		7F0E931D1D02FC250096BABE /* Global.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7F0E931C1D02FC250096BABE /* Global.swift */; };
 		7F84B6221CC506790059A82B /* JaredFramework.h in Headers */ = {isa = PBXBuildFile; fileRef = 7F84B6211CC506790059A82B /* JaredFramework.h */; settings = {ATTRIBUTES = (Public, ); }; };
@@ -31,9 +32,10 @@
 		B37E82821FA85B210069E15D /* SendTextSingleBuddy.scpt in Resources */ = {isa = PBXBuildFile; fileRef = B37E82811FA85B210069E15D /* SendTextSingleBuddy.scpt */; };
 		B39A65E01CC1FB1B003E26B0 /* Routing.swift in Sources */ = {isa = PBXBuildFile; fileRef = B39A65DF1CC1FB1B003E26B0 /* Routing.swift */; };
 		B39F2B391CB3BCA700C0D35C /* SendText.scpt in Resources */ = {isa = PBXBuildFile; fileRef = B39F2B381CB3BCA700C0D35C /* SendText.scpt */; };
-		B3AECB5E2207CE2C003E32F8 /* Pods_Jared.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 4589B5638BC576CC8AB2700A /* Pods_Jared.framework */; };
+		B3A4C61423B867E300B7F009 /* MessageRequest.swift in Sources */ = {isa = PBXBuildFile; fileRef = B3A4C61323B867E300B7F009 /* MessageRequest.swift */; };
 		B3AECB5F2207CE33003E32F8 /* JaredFramework.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 7F84B61F1CC506790059A82B /* JaredFramework.framework */; };
 		B3BBA7D11CB3284A00E1749C /* CoreModule.swift in Sources */ = {isa = PBXBuildFile; fileRef = B39EC17D1CB01FEF002C3161 /* CoreModule.swift */; };
+		B3C59284224DD17900116ECB /* JaredWebServer.swift in Sources */ = {isa = PBXBuildFile; fileRef = B3C59283224DD17900116ECB /* JaredWebServer.swift */; };
 		B3EF1DA02206849000953DE7 /* WebHookManager.swift in Sources */ = {isa = PBXBuildFile; fileRef = B3327DC522066427009DD882 /* WebHookManager.swift */; };
 		B3EF1DA4220687DD00953DE7 /* URLProtocolMock.swift in Sources */ = {isa = PBXBuildFile; fileRef = B3EF1DA3220687DD00953DE7 /* URLProtocolMock.swift */; };
 		B3EF1DA62206DFEA00953DE7 /* Route.swift in Sources */ = {isa = PBXBuildFile; fileRef = B3EF1DA52206DFEA00953DE7 /* Route.swift */; };
@@ -116,9 +118,11 @@
 		B39EC1751CB01F55002C3161 /* Message.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; name = Message.swift; path = ../Jared/Message.swift; sourceTree = "<group>"; };
 		B39EC17D1CB01FEF002C3161 /* CoreModule.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = CoreModule.swift; sourceTree = "<group>"; };
 		B39F2B381CB3BCA700C0D35C /* SendText.scpt */ = {isa = PBXFileReference; lastKnownFileType = file; path = SendText.scpt; sourceTree = "<group>"; };
+		B3A4C61323B867E300B7F009 /* MessageRequest.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MessageRequest.swift; sourceTree = "<group>"; };
 		B3BBA7CC1CB3259A00E1749C /* en */ = {isa = PBXFileReference; lastKnownFileType = text.plist.strings; name = en; path = en.lproj/CoreStrings.strings; sourceTree = "<group>"; };
 		B3BBA7CF1CB327C200E1749C /* ja */ = {isa = PBXFileReference; lastKnownFileType = text.plist.strings; name = ja; path = ja.lproj/Main.strings; sourceTree = "<group>"; };
 		B3BBA7D01CB327C200E1749C /* ja */ = {isa = PBXFileReference; lastKnownFileType = text.plist.strings; name = ja; path = ja.lproj/CoreStrings.strings; sourceTree = "<group>"; };
+		B3C59283224DD17900116ECB /* JaredWebServer.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = JaredWebServer.swift; sourceTree = "<group>"; };
 		B3EF1DA3220687DD00953DE7 /* URLProtocolMock.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = URLProtocolMock.swift; sourceTree = "<group>"; };
 		B3EF1DA52206DFEA00953DE7 /* Route.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Route.swift; sourceTree = "<group>"; };
 		B3EF1DA92206E09B00953DE7 /* Jared.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Jared.swift; sourceTree = "<group>"; };
@@ -143,6 +147,7 @@
 			files = (
 				7F84B6261CC506790059A82B /* JaredFramework.framework in Frameworks */,
 				1D6188C0EEA4AA406C15CC9E /* Pods_Jared.framework in Frameworks */,
+				00FC0A452FD8C8D0FCDA16D4 /* Pods_Jared.framework in Frameworks */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -151,7 +156,6 @@
 			buildActionMask = 2147483647;
 			files = (
 				B3AECB5F2207CE33003E32F8 /* JaredFramework.framework in Frameworks */,
-				B3AECB5E2207CE2C003E32F8 /* Pods_Jared.framework in Frameworks */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -262,6 +266,8 @@
 				B39A65DF1CC1FB1B003E26B0 /* Routing.swift */,
 				B3327DC522066427009DD882 /* WebHookManager.swift */,
 				B3327DC32206607B009DD882 /* ContactHelper.swift */,
+				B3C59283224DD17900116ECB /* JaredWebServer.swift */,
+				B3A4C61323B867E300B7F009 /* MessageRequest.swift */,
 				B35CE7142196AD4E002F52A7 /* DatabaseHandler.swift */,
 				7F0E931C1D02FC250096BABE /* Global.swift */,
 				B3BBA7CD1CB3259A00E1749C /* CoreStrings.strings */,
@@ -369,6 +375,7 @@
 				TargetAttributes = {
 					7F84B61E1CC506790059A82B = {
 						CreatedOnToolsVersion = 7.3;
+						DevelopmentTeam = C7LJ587XF3;
 						LastSwiftMigration = 1010;
 						ProvisioningStyle = Automatic;
 					};
@@ -447,13 +454,19 @@
 			);
 			inputPaths = (
 				"${SRCROOT}/Pods/Target Support Files/Pods-Jared/Pods-Jared-frameworks.sh",
+				"${BUILT_PRODUCTS_DIR}/CocoaAsyncSocket/CocoaAsyncSocket.framework",
+				"${BUILT_PRODUCTS_DIR}/HTTPParserC/HTTPParserC.framework",
 				"${BUILT_PRODUCTS_DIR}/Realm/Realm.framework",
 				"${BUILT_PRODUCTS_DIR}/RealmSwift/RealmSwift.framework",
+				"${BUILT_PRODUCTS_DIR}/Telegraph/Telegraph.framework",
 			);
 			name = "[CP] Embed Pods Frameworks";
 			outputPaths = (
+				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/CocoaAsyncSocket.framework",
+				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/HTTPParserC.framework",
 				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/Realm.framework",
 				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/RealmSwift.framework",
+				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/Telegraph.framework",
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/sh;
@@ -529,6 +542,7 @@
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				B3A4C61423B867E300B7F009 /* MessageRequest.swift in Sources */,
 				B39A65E01CC1FB1B003E26B0 /* Routing.swift in Sources */,
 				B3BBA7D11CB3284A00E1749C /* CoreModule.swift in Sources */,
 				B36563EF1F3D68980064B114 /* TouchBarTextFieldExtension.swift in Sources */,
@@ -540,6 +554,7 @@
 				B316D1A61F3FFDF100AFF063 /* CoreModuleRealm.swift in Sources */,
 				B375A65921EB14470073F09F /* AboutViewController.swift in Sources */,
 				7F0E931D1D02FC250096BABE /* Global.swift in Sources */,
+				B3C59284224DD17900116ECB /* JaredWebServer.swift in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -604,7 +619,7 @@
 				COMBINE_HIDPI_IMAGES = YES;
 				CURRENT_PROJECT_VERSION = 1;
 				DEFINES_MODULE = YES;
-				DEVELOPMENT_TEAM = "";
+				DEVELOPMENT_TEAM = C7LJ587XF3;
 				DYLIB_COMPATIBILITY_VERSION = 1;
 				DYLIB_CURRENT_VERSION = 1;
 				DYLIB_INSTALL_NAME_BASE = "@rpath";
@@ -630,7 +645,7 @@
 				COMBINE_HIDPI_IMAGES = YES;
 				CURRENT_PROJECT_VERSION = 1;
 				DEFINES_MODULE = YES;
-				DEVELOPMENT_TEAM = "";
+				DEVELOPMENT_TEAM = C7LJ587XF3;
 				DYLIB_COMPATIBILITY_VERSION = 1;
 				DYLIB_CURRENT_VERSION = 1;
 				DYLIB_INSTALL_NAME_BASE = "@rpath";
diff --git a/Jared.xcodeproj/xcshareddata/xcschemes/JaredFramework.xcscheme b/Jared.xcodeproj/xcshareddata/xcschemes/JaredFramework.xcscheme
index 8c2612b..6bedc53 100644
--- a/Jared.xcodeproj/xcshareddata/xcschemes/JaredFramework.xcscheme
+++ b/Jared.xcodeproj/xcshareddata/xcschemes/JaredFramework.xcscheme
@@ -33,7 +33,7 @@
       </AdditionalOptions>
    </TestAction>
    <LaunchAction
-      buildConfiguration = "Debug"
+      buildConfiguration = "Release"
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
       launchStyle = "0"
diff --git a/Jared/DatabaseHandler.swift b/Jared/DatabaseHandler.swift
index df30cef..5b55c4f 100644
--- a/Jared/DatabaseHandler.swift
+++ b/Jared/DatabaseHandler.swift
@@ -38,7 +38,6 @@ class DatabaseHandler {
         querySinceID = getCurrentMaxRecordID()
     }
     
-    
     deinit {
         shouldExitThread = true
         if sqlite3_close(db) != SQLITE_OK {
diff --git a/Jared/JaredWebServer.swift b/Jared/JaredWebServer.swift
new file mode 100644
index 0000000..b5caac7
--- /dev/null
+++ b/Jared/JaredWebServer.swift
@@ -0,0 +1,99 @@
+import Foundation
+import Telegraph
+import JaredFramework
+
+class JaredWebServer: NSObject {
+    static var DEFAULT_PORT = 3000
+    var defaults: UserDefaults!
+    var server: Server!
+    var port: Int!
+    
+    override init() {
+        super.init()
+        defaults = UserDefaults.standard
+        server = Server()
+        server.route(.POST, "message", JaredWebServer.handleMessageRequest)
+        
+        port = assignPort()
+        
+        defaults.addObserver(self, forKeyPath: "RestApiIsDisabled", options: .new, context: nil)
+        updateServerState()
+    }
+    
+    deinit {
+        UserDefaults.standard.removeObserver(self, forKeyPath: "JaredIsDisabled")
+    }
+    
+    // Attempt to pull the port number from the config
+    func assignPort() -> Int {
+        let filemanager = FileManager.default
+        let appsupport = filemanager.urls(for: .applicationSupportDirectory, in: .userDomainMask)[0]
+        let supportDir = appsupport.appendingPathComponent("Jared")
+        let configPath = supportDir.appendingPathComponent("config.json")
+        do {
+            // If config file does not exist, use default port
+            guard filemanager.fileExists(atPath: configPath.path) else {
+                return JaredWebServer.DEFAULT_PORT
+            }
+            
+            //Read the JSON config file
+            let jsonData = try! NSData(contentsOfFile: supportDir.appendingPathComponent("config.json").path, options: .mappedIfSafe)
+            
+            // If the JSON format is not as expected at all, use the default port
+            guard let jsonResult = try? JSONSerialization.jsonObject(with: jsonData as Data, options: JSONSerialization.ReadingOptions.mutableContainers) as? [String:AnyObject] else {
+                return JaredWebServer.DEFAULT_PORT
+            }
+            
+            guard let serverConfig = jsonResult?["webserver"] as? [String : AnyObject] else {
+                return JaredWebServer.DEFAULT_PORT
+            }
+            
+            guard let configPort = serverConfig["port"] as? NSNumber else {
+                return JaredWebServer.DEFAULT_PORT
+            }
+            
+            return Int(truncating: configPort)
+        }
+    }
+    
+    override func observeValue(forKeyPath keyPath: String?, of object: Any?, change: [NSKeyValueChangeKey : Any]?, context: UnsafeMutableRawPointer?) {
+        if (keyPath == "RestApiIsDisabled") {
+            updateServerState()
+        }
+    }
+    
+    func updateServerState() {
+        if (defaults.bool(forKey: "RestApiIsDisabled")) {
+            stop()
+        } else {
+            start()
+        }
+    }
+    
+    func start() {
+        try? server.start(port: port)
+    }
+    
+    func stop() {
+        server.stop()
+    }
+    
+    static func handleMessageRequest(request: HTTPRequest) -> HTTPResponse {
+        // Attempt to decode the request body to the MessageRequest struct
+        do {
+            let parsedBody = try JSONDecoder().decode(MessageRequest.self, from: request.body)
+            
+            if let textBody = parsedBody.body as? TextBody {
+                Jared.Send(textBody.message, to: parsedBody.recipient)
+                return HTTPResponse()
+            }
+            else {
+                return HTTPResponse(HTTPStatus(code: 400, phrase: "Bad Request"), headers: HTTPHeaders(), content: "Image body types are not supported yet.")
+            }
+        } catch {
+            return HTTPResponse(HTTPStatus(code: 400, phrase: "Bad Request"), headers: HTTPHeaders(), content: error.localizedDescription)
+        }
+    }
+}
+
+
diff --git a/Jared/MessageRequest.swift b/Jared/MessageRequest.swift
new file mode 100644
index 0000000..56ead4a
--- /dev/null
+++ b/Jared/MessageRequest.swift
@@ -0,0 +1,45 @@
+//
+//  MessageRequest.swift
+//  Jared
+//
+//  Created by Zeke Snider on 12/28/19.
+//  Copyright © 2019 Zeke Snider. All rights reserved.
+//
+
+import Foundation
+import JaredFramework
+
+// Struct that defines what parameters are accepted in requests
+public struct MessageRequest: Decodable {
+    public var body: MessageBody
+    public var recipient: RecipientEntity
+    
+    enum CodingKeys : String, CodingKey {
+        case body
+        case recipient
+    }
+    
+    enum ParameterError: Error {
+        case runtimeError(String)
+    }
+    
+    public init(from decoder: Decoder) throws {
+        let container = try decoder.container(keyedBy: CodingKeys.self)
+        
+        if let textBody = try? container.decode(TextBody.self, forKey: .body) {
+            self.body = textBody
+        } else if let imageBody = try? container.decode(ImageBody.self, forKey: .body) {
+            self.body = imageBody
+        } else {
+            throw ParameterError.runtimeError("the body parameter is incorrectly formatted")
+        }
+        
+        if let person = try? container.decode(Person.self, forKey: .recipient) {
+            self.recipient = person
+        } else if let group = try? container.decode(Group.self, forKey: .recipient) {
+            self.recipient = group
+        } else {
+            throw ParameterError.runtimeError("the recipient parameter is incorrectly formatted")
+        }
+    }
+}
diff --git a/Jared/config.json b/Jared/config.json
index 9b89e99..5bd332d 100644
--- a/Jared/config.json
+++ b/Jared/config.json
@@ -2,5 +2,8 @@
 	"routes": {
 	},
     "webhooks": [
-    ]
+    ],
+    "webserver": {
+        "port": 3000
+    }
 }
diff --git a/JaredFramework/Bodies.swift b/JaredFramework/Bodies.swift
index 8200b62..d90d036 100644
--- a/JaredFramework/Bodies.swift
+++ b/JaredFramework/Bodies.swift
@@ -13,8 +13,8 @@ public protocol MessageBody: Codable {}
 public struct TextBody: MessageBody, Codable {
     public var message: String
     
-    public init(_ inMessage: String) {
-        message = inMessage
+    public init(_ message: String) {
+        self.message = message
     }
 }
 
diff --git a/JaredFramework/Entities.swift b/JaredFramework/Entities.swift
index c56c791..62e1773 100644
--- a/JaredFramework/Entities.swift
+++ b/JaredFramework/Entities.swift
@@ -21,10 +21,18 @@ public struct Person: SenderEntity, RecipientEntity, Codable, Equatable {
     public var handle: String
     public var isMe: Bool = false
     
-    public init(givenName: String?, handle: String, isMe: Bool) {
+    enum CodingKeys : String, CodingKey{
+        case handle
+    }
+    
+    public init(handle: String) {
+        self.handle = handle
+    }
+    
+    public init(givenName: String?, handle: String, isMe: Bool?) {
         self.givenName = givenName
         self.handle = handle
-        self.isMe = isMe
+        self.isMe = isMe ?? false
     }
     
     public static func == (lhs: Person, rhs: Person) -> Bool {
diff --git a/JaredFramework/Info.plist b/JaredFramework/Info.plist
index 01c96ce..1b49f36 100644
--- a/JaredFramework/Info.plist
+++ b/JaredFramework/Info.plist
@@ -15,7 +15,7 @@
 	<key>CFBundlePackageType</key>
 	<string>FMWK</string>
 	<key>CFBundleShortVersionString</key>
-	<string>2.0</string>
+	<string>2.1</string>
 	<key>CFBundleSignature</key>
 	<string>????</string>
 	<key>CFBundleVersion</key>
diff --git a/JaredUI/AboutViewController.swift b/JaredUI/AboutViewController.swift
index 8fcb3bc..825bede 100644
--- a/JaredUI/AboutViewController.swift
+++ b/JaredUI/AboutViewController.swift
@@ -9,7 +9,6 @@
 import Cocoa
 
 class AboutViewController: NSViewController {
-
     @IBAction func updateButtonClicked(_ sender: Any) {
         NSWorkspace.shared.open(URL(string: "https://github.com/zekesnider/jared/releases")!)
     }
diff --git a/JaredUI/AppDelegate.swift b/JaredUI/AppDelegate.swift
index 856a016..7f9957f 100644
--- a/JaredUI/AppDelegate.swift
+++ b/JaredUI/AppDelegate.swift
@@ -11,8 +11,8 @@ import Contacts
 
 @NSApplicationMain
 class AppDelegate: NSObject, NSApplicationDelegate {
-    
     var Router = MessageRouting()
+    var Server = JaredWebServer()
 
     func applicationDidFinishLaunching(_ aNotification: Notification) {
         // If this is the first run of the application, request access
diff --git a/JaredUI/Base.lproj/Main.storyboard b/JaredUI/Base.lproj/Main.storyboard
index 5bfde97..2ae4908 100644
--- a/JaredUI/Base.lproj/Main.storyboard
+++ b/JaredUI/Base.lproj/Main.storyboard
@@ -1,9 +1,9 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<document type="com.apple.InterfaceBuilder3.Cocoa.Storyboard.XIB" version="3.0" toolsVersion="14460.31" targetRuntime="MacOSX.Cocoa" propertyAccessControl="none" useAutolayout="YES" initialViewController="B8D-0N-5wS">
+<document type="com.apple.InterfaceBuilder3.Cocoa.Storyboard.XIB" version="3.0" toolsVersion="15702" targetRuntime="MacOSX.Cocoa" propertyAccessControl="none" useAutolayout="YES" initialViewController="B8D-0N-5wS">
     <dependencies>
         <deployment identifier="macosx"/>
-        <plugIn identifier="com.apple.InterfaceBuilder.CocoaDFRPlugin" version="14460.1"/>
-        <plugIn identifier="com.apple.InterfaceBuilder.CocoaPlugin" version="14460.31"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.CocoaDFRPlugin" version="14550"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.CocoaPlugin" version="15702"/>
         <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
         <capability name="the Touch Bar" minToolsVersion="8.1" minSystemVersion="10.12.2" requiredIntegratedClassName="NSTouchBar"/>
     </dependencies>
@@ -175,18 +175,18 @@
                             <textField horizontalHuggingPriority="251" verticalHuggingPriority="750" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="EnU-Kl-1hP">
                                 <rect key="frame" x="18" y="50" width="166" height="17"/>
                                 <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMinY="YES"/>
-                                <textFieldCell key="cell" scrollable="YES" lineBreakMode="clipping" sendsActionOnEndEditing="YES" title="Version 1.2" id="XbK-Ng-ppS">
+                                <textFieldCell key="cell" scrollable="YES" lineBreakMode="clipping" sendsActionOnEndEditing="YES" title="Version 1.3" id="XbK-Ng-ppS">
                                     <font key="font" metaFont="system"/>
                                     <color key="textColor" name="labelColor" catalog="System" colorSpace="catalog"/>
                                     <color key="backgroundColor" name="controlColor" catalog="System" colorSpace="catalog"/>
                                 </textFieldCell>
                             </textField>
                             <textField horizontalHuggingPriority="251" verticalHuggingPriority="750" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="gR8-1F-OST">
-                                <rect key="frame" x="18" y="20" width="166" height="22"/>
+                                <rect key="frame" x="18" y="20" width="168" height="22"/>
                                 <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMinY="YES"/>
                                 <textFieldCell key="cell" scrollable="YES" lineBreakMode="clipping" sendsActionOnEndEditing="YES" alignment="left" id="4ae-DO-NLa">
                                     <font key="font" metaFont="miniSystem"/>
-                                    <string key="title">Copyright © 2016–2019 Zeke Snider.
+                                    <string key="title">Copyright © 2016–2020 Zeke Snider.
 All rights reserved.</string>
                                     <color key="textColor" name="labelColor" catalog="System" colorSpace="catalog"/>
                                     <color key="backgroundColor" name="controlColor" catalog="System" colorSpace="catalog"/>
@@ -241,7 +241,7 @@ All rights reserved.</string>
             <objects>
                 <viewController title="Jared" storyboardIdentifier="APIKeyPanel" id="XfG-lQ-9wD" customClass="ViewController" customModule="Jared" customModuleProvider="target" sceneMemberID="viewController">
                     <view key="view" wantsLayer="YES" id="m2S-Jp-Qdl">
-                        <rect key="frame" x="0.0" y="0.0" width="480" height="150"/>
+                        <rect key="frame" x="0.0" y="0.0" width="480" height="170"/>
                         <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
                         <subviews>
                             <button verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="qSb-Pv-q99">
@@ -255,7 +255,7 @@ All rights reserved.</string>
                                 </connections>
                             </button>
                             <button verticalHuggingPriority="750" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="Ndf-cS-v7Z">
-                                <rect key="frame" x="310" y="46" width="156" height="32"/>
+                                <rect key="frame" x="310" y="54" width="156" height="32"/>
                                 <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMinY="YES"/>
                                 <buttonCell key="cell" type="push" title="Open Plugin Folder" bezelStyle="rounded" alignment="center" borderStyle="border" imageScaling="proportionallyDown" inset="2" id="Cg8-ZL-KVX">
                                     <behavior key="behavior" pushIn="YES" lightByBackground="YES" lightByGray="YES"/>
@@ -266,7 +266,7 @@ All rights reserved.</string>
                                 </connections>
                             </button>
                             <button verticalHuggingPriority="750" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="i1d-II-CRR">
-                                <rect key="frame" x="14" y="46" width="130" height="32"/>
+                                <rect key="frame" x="14" y="54" width="130" height="32"/>
                                 <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMinY="YES"/>
                                 <buttonCell key="cell" type="push" title="Reload Plugins" bezelStyle="rounded" alignment="center" borderStyle="border" imageScaling="proportionallyDown" inset="2" id="R03-zL-JIN">
                                     <behavior key="behavior" pushIn="YES" lightByBackground="YES" lightByGray="YES"/>
@@ -277,9 +277,9 @@ All rights reserved.</string>
                                 </connections>
                             </button>
                             <button verticalHuggingPriority="750" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="TGv-df-gfJ">
-                                <rect key="frame" x="381" y="104" width="85" height="32"/>
+                                <rect key="frame" x="343" y="122" width="123" height="32"/>
                                 <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMinY="YES"/>
-                                <buttonCell key="cell" type="push" title="Disable" bezelStyle="rounded" alignment="center" borderStyle="border" imageScaling="proportionallyDown" inset="2" id="D1V-vF-OOT">
+                                <buttonCell key="cell" type="push" title="Disable Jared" bezelStyle="rounded" alignment="center" borderStyle="border" imageScaling="proportionallyDown" inset="2" id="D1V-vF-OOT">
                                     <behavior key="behavior" pushIn="YES" lightByBackground="YES" lightByGray="YES"/>
                                     <font key="font" metaFont="system"/>
                                 </buttonCell>
@@ -288,12 +288,12 @@ All rights reserved.</string>
                                 </connections>
                             </button>
                             <imageView horizontalHuggingPriority="251" verticalHuggingPriority="251" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="A1L-my-aOk">
-                                <rect key="frame" x="20" y="111" width="18" height="19"/>
+                                <rect key="frame" x="20" y="131" width="18" height="19"/>
                                 <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMinY="YES"/>
                                 <imageCell key="cell" refusesFirstResponder="YES" alignment="left" imageScaling="proportionallyDown" id="vxL-Li-GhX"/>
                             </imageView>
                             <textField horizontalHuggingPriority="251" verticalHuggingPriority="750" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="2V5-Ep-TtZ">
-                                <rect key="frame" x="44" y="114" width="165" height="17"/>
+                                <rect key="frame" x="44" y="134" width="165" height="17"/>
                                 <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMinY="YES"/>
                                 <textFieldCell key="cell" scrollable="YES" lineBreakMode="clipping" sendsActionOnEndEditing="YES" title="Jared is currently enabled." id="Evo-lo-agp">
                                     <font key="font" metaFont="system"/>
@@ -301,6 +301,34 @@ All rights reserved.</string>
                                     <color key="backgroundColor" name="controlColor" catalog="System" colorSpace="catalog"/>
                                 </textFieldCell>
                             </textField>
+                            <imageView horizontalHuggingPriority="251" verticalHuggingPriority="251" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="22o-hP-m2g">
+                                <rect key="frame" x="20" y="99" width="18" height="19"/>
+                                <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMinY="YES"/>
+                                <imageCell key="cell" refusesFirstResponder="YES" alignment="left" imageScaling="proportionallyDown" id="TH7-YF-Od1"/>
+                            </imageView>
+                            <textField horizontalHuggingPriority="251" verticalHuggingPriority="750" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="GLv-Vr-bLh">
+                                <rect key="frame" x="44" y="100" width="188" height="17"/>
+                                <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMinY="YES"/>
+                                <textFieldCell key="cell" scrollable="YES" lineBreakMode="clipping" sendsActionOnEndEditing="YES" title="REST API is currently enabled." id="wKw-Wv-xLC">
+                                    <font key="font" metaFont="system"/>
+                                    <color key="textColor" name="labelColor" catalog="System" colorSpace="catalog"/>
+                                    <color key="backgroundColor" name="controlColor" catalog="System" colorSpace="catalog"/>
+                                </textFieldCell>
+                                <connections>
+                                    <action selector="RestApiStatusLabel:" target="XfG-lQ-9wD" id="GdN-8D-wJd"/>
+                                </connections>
+                            </textField>
+                            <button verticalHuggingPriority="750" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="FWv-Ct-Itm">
+                                <rect key="frame" x="357" y="90" width="109" height="32"/>
+                                <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMinY="YES"/>
+                                <buttonCell key="cell" type="push" title="Disable API" bezelStyle="rounded" alignment="center" borderStyle="border" imageScaling="proportionallyDown" inset="2" id="r2Z-1u-x9d">
+                                    <behavior key="behavior" pushIn="YES" lightByBackground="YES" lightByGray="YES"/>
+                                    <font key="font" metaFont="system"/>
+                                </buttonCell>
+                                <connections>
+                                    <action selector="EnableDisableRestApiAction:" target="XfG-lQ-9wD" id="TAW-oq-F1H"/>
+                                </connections>
+                            </button>
                         </subviews>
                         <constraints>
                             <constraint firstAttribute="bottom" secondItem="qSb-Pv-q99" secondAttribute="bottom" constant="20" id="16o-RW-MdM"/>
@@ -312,8 +340,8 @@ All rights reserved.</string>
                             <touchBarSpacerItem identifier="NSTouchBarItemIdentifierFlexibleSpace" id="iwM-Xg-yil"/>
                             <touchBarItem id="KQH-6n-TyJ">
                                 <viewController key="viewController" id="M4J-Bf-Jpq">
-                                    <button key="view" verticalHuggingPriority="750" misplaced="YES" translatesAutoresizingMaskIntoConstraints="NO" id="trk-Nk-t1G">
-                                        <rect key="frame" x="6" y="-4" width="72" height="30"/>
+                                    <button key="view" verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="trk-Nk-t1G">
+                                        <rect key="frame" x="0.0" y="-11" width="84" height="41"/>
                                         <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMinY="YES"/>
                                         <buttonCell key="cell" type="push" title="Disable" bezelStyle="rounded" alignment="center" borderStyle="border" imageScaling="proportionallyDown" inset="2" id="7jf-Pm-a3s">
                                             <behavior key="behavior" pushIn="YES" lightByBackground="YES" lightByGray="YES"/>
@@ -345,7 +373,7 @@ All rights reserved.</string>
                             <touchBarItem id="tC4-yt-Hc1">
                                 <viewController key="viewController" id="nll-GY-k7t">
                                     <button key="view" verticalHuggingPriority="750" misplaced="YES" translatesAutoresizingMaskIntoConstraints="NO" id="QBB-ar-F1A">
-                                        <rect key="frame" x="6" y="-4" width="126" height="30"/>
+                                        <rect key="frame" x="0.0" y="0.0" width="126" height="30"/>
                                         <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMinY="YES"/>
                                         <buttonCell key="cell" type="push" title="Reload Plugins" bezelStyle="rounded" alignment="center" borderStyle="border" imageScaling="proportionallyDown" inset="2" id="JKe-6e-7Jt">
                                             <behavior key="behavior" pushIn="YES" lightByBackground="YES" lightByGray="YES"/>
@@ -361,7 +389,7 @@ All rights reserved.</string>
                             <touchBarItem id="amC-uF-2aV">
                                 <viewController key="viewController" id="XwG-AW-YxK">
                                     <textField key="view" verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="hID-cO-Xdo">
-                                        <rect key="frame" x="0.0" y="0.0" width="27" height="24"/>
+                                        <rect key="frame" x="0.0" y="1" width="27" height="23"/>
                                         <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMinY="YES"/>
                                         <textFieldCell key="cell" borderStyle="bezel" alignment="left" title=":^)" drawsBackground="YES" id="vcl-tK-3Tc">
                                             <font key="font" usesAppearanceFont="YES"/>
@@ -377,14 +405,17 @@ All rights reserved.</string>
                     </touchBar>
                     <connections>
                         <outlet property="EnableDisableButton" destination="7jf-Pm-a3s" id="k0G-Ec-SXe"/>
-                        <outlet property="EnableDisableUIButton" destination="TGv-df-gfJ" id="nR1-v0-M6W"/>
+                        <outlet property="EnableDisableRestApiUiButton" destination="FWv-Ct-Itm" id="bOP-AV-spy"/>
+                        <outlet property="EnableDisableUiButton" destination="TGv-df-gfJ" id="nR1-v0-M6W"/>
                         <outlet property="JaredStatusLabel" destination="2V5-Ep-TtZ" id="I4v-2G-ubN"/>
+                        <outlet property="RestApiStatusImage" destination="22o-hP-m2g" id="RTM-cm-9dI"/>
+                        <outlet property="RestApiStatusLabel" destination="GLv-Vr-bLh" id="Jxs-5m-uKj"/>
                         <outlet property="statusImage" destination="A1L-my-aOk" id="5CN-7g-hEf"/>
                     </connections>
                 </viewController>
                 <customObject id="rPt-NT-nkU" userLabel="First Responder" customClass="NSResponder" sceneMemberID="firstResponder"/>
             </objects>
-            <point key="canvasLocation" x="-236" y="939"/>
+            <point key="canvasLocation" x="-236" y="949"/>
         </scene>
         <!--Window Controller-->
         <scene sceneID="ZZn-28-m0u">
diff --git a/JaredUI/Info.plist b/JaredUI/Info.plist
index 7364644..9a56f46 100644
--- a/JaredUI/Info.plist
+++ b/JaredUI/Info.plist
@@ -21,7 +21,7 @@
 	<key>CFBundleSignature</key>
 	<string>????</string>
 	<key>CFBundleVersion</key>
-	<string>328</string>
+	<string>360</string>
 	<key>LSApplicationCategoryType</key>
 	<string>public.app-category.utilities</string>
 	<key>LSMinimumSystemVersion</key>
diff --git a/JaredUI/TouchBarTextFieldExtension.swift b/JaredUI/TouchBarTextFieldExtension.swift
index 98fe287..1c24866 100644
--- a/JaredUI/TouchBarTextFieldExtension.swift
+++ b/JaredUI/TouchBarTextFieldExtension.swift
@@ -10,7 +10,6 @@ import Foundation
 import Cocoa
 
 extension NSTextView {
-    
     @available(OSX 10.12.2, *)
     override open func makeTouchBar() -> NSTouchBar? {
         
diff --git a/JaredUI/ViewController.swift b/JaredUI/ViewController.swift
index 02ff612..0997a9c 100644
--- a/JaredUI/ViewController.swift
+++ b/JaredUI/ViewController.swift
@@ -9,14 +9,19 @@
 import Cocoa
 
 class ViewController: NSViewController {
-    
     var defaults: UserDefaults!
     
     override func viewDidLoad() {
         super.viewDidLoad()
         let defaults = UserDefaults.standard
         
+        // Server should be disabled by default
+        if defaults.value(forKey: "RestApiIsDisabled") == nil {
+            defaults.set(false, forKey: "RestApiIsDisabled")
+        }
+        
         defaults.addObserver(self, forKeyPath: "JaredIsDisabled", options: .new, context: nil)
+        defaults.addObserver(self, forKeyPath: "RestApiIsDisabled", options: .new, context: nil)
         updateTouchBarButton()
     }
     
@@ -41,7 +46,8 @@ class ViewController: NSViewController {
     }
     
     override func observeValue(forKeyPath keyPath: String?, of object: Any?, change: [NSKeyValueChangeKey : Any]?, context: UnsafeMutableRawPointer?) {
-        if keyPath == "JaredIsDisabled" {
+        if keyPath == "JaredIsDisabled"
+            || keyPath == "RestApiIsDisabled" {
             updateTouchBarButton()
         }
     }
@@ -50,16 +56,29 @@ class ViewController: NSViewController {
         let defaults = UserDefaults.standard
         if (defaults.bool(forKey: "JaredIsDisabled")) {
             EnableDisableButton.title = "Enable"
-            EnableDisableUIButton.title = "Enable"
+            EnableDisableUiButton.title = "Enable Jared"
             JaredStatusLabel.stringValue = "Jared is currently disabled"
             statusImage.image = NSImage(named: NSImage.statusUnavailableName)
         }
         else {
             EnableDisableButton.title = "Disable"
-            EnableDisableUIButton.title = "Disable"
+            EnableDisableUiButton.title = "Disable Jared"
             JaredStatusLabel.stringValue = "Jared is currently enabled"
             statusImage.image = NSImage(named: NSImage.statusAvailableName)
         }
+        
+        if (defaults.bool(forKey: "RestApiIsDisabled")) {
+//            EnableDisableButton.title = "Enable"
+            EnableDisableRestApiUiButton.title = "Enable API"
+            RestApiStatusLabel.stringValue = "REST API is currently disabled"
+            RestApiStatusImage.image = NSImage(named: NSImage.statusUnavailableName)
+        }
+        else {
+//            EnableDisableButton.title = "Disable"
+            EnableDisableRestApiUiButton.title = "Disable API"
+            RestApiStatusLabel.stringValue = "REST API is currently enabled"
+            RestApiStatusImage.image = NSImage(named: NSImage.statusAvailableName)
+        }
     }
     
     func displayAccessError() {
@@ -81,13 +100,16 @@ class ViewController: NSViewController {
         defaults.set(true, forKey: "JaredIsDisabled")
         updateTouchBarButton()
         
-        EnableDisableUIButton.isEnabled = false
+        EnableDisableUiButton.isEnabled = false
         EnableDisableButton.isEnabled = false
     }
     
     @IBOutlet weak var JaredStatusLabel: NSTextField!
-    @IBOutlet weak var EnableDisableUIButton: NSButton!
+    @IBOutlet weak var EnableDisableUiButton: NSButton!
     @IBOutlet weak var EnableDisableButton: NSButtonCell!
+    @IBOutlet weak var EnableDisableRestApiUiButton: NSButton!
+    @IBOutlet weak var RestApiStatusLabel: NSTextField!
+    @IBOutlet weak var RestApiStatusImage: NSImageView!
     @IBOutlet weak var statusImage: NSImageView!
     
     @IBAction func EnableDisableAction(_ sender: Any) {
@@ -103,6 +125,19 @@ class ViewController: NSViewController {
         updateTouchBarButton()
     }
     
+    @IBAction func EnableDisableRestApiAction(_ sender: Any) {
+        let defaults = UserDefaults.standard
+        
+        if (defaults.bool(forKey: "RestApiIsDisabled")) {
+            defaults.set(false, forKey: "RestApiIsDisabled")
+        }
+        else {
+            defaults.set(true, forKey: "RestApiIsDisabled")
+        }
+        
+        updateTouchBarButton()
+    }
+    
     @IBAction func OpenPluginsButtonAction(_ sender: Any) {
         let filemanager = FileManager.default
         let appsupport = filemanager.urls(for: .applicationSupportDirectory, in: .userDomainMask)[0]
diff --git a/Podfile.lock b/Podfile.lock
index 7197b9f..1a91a3c 100644
--- a/Podfile.lock
+++ b/Podfile.lock
@@ -1,17 +1,26 @@
 PODS:
-  - Realm (3.13.1):
-    - Realm/Headers (= 3.13.1)
-  - Realm/Headers (3.13.1)
-  - RealmSwift (3.13.1):
-    - Realm (= 3.13.1)
+  - CocoaAsyncSocket (7.6.3)
+  - HTTPParserC (2.9.2)
+  - Realm (4.3.0):
+    - Realm/Headers (= 4.3.0)
+  - Realm/Headers (4.3.0)
+  - RealmSwift (4.3.0):
+    - Realm (= 4.3.0)
+  - Telegraph (0.27):
+    - CocoaAsyncSocket (~> 7.5)
+    - HTTPParserC (~> 2.7)
 
 DEPENDENCIES:
   - RealmSwift
+  - Telegraph
 
 SPEC CHECKSUMS:
-  Realm: 50071da38fe079e0735e47c9f2eae738c68c5996
-  RealmSwift: 8a1e6a02b7a08cd17a31e3115143fb69fe5f3fb9
+  CocoaAsyncSocket: eafaa68a7e0ec99ead0a7b35015e0bf25d2c8987
+  HTTPParserC: 1ed389f80bb57a5b967d87d5358b8a94418394ee
+  Realm: 9357c3589555793e1860a7104a7412bca4a48d99
+  RealmSwift: 402f1e379a8ef82c635313037b043f0f06de880c
+  Telegraph: 28cfb24fae20bc1399475062352977cc314aa097
 
-PODFILE CHECKSUM: 119c88ad294b09ac6c692cc9eacc1e76733a8458
+PODFILE CHECKSUM: b112a5394a83be5c825d47408783e80cbf9870ed
 
 COCOAPODS: 1.4.0
diff --git a/Pods/CocoaAsyncSocket/LICENSE.txt b/Pods/CocoaAsyncSocket/LICENSE.txt
new file mode 100644
index 0000000..ed3d60f
--- /dev/null
+++ b/Pods/CocoaAsyncSocket/LICENSE.txt
@@ -0,0 +1,35 @@
+This library is in the public domain.
+However, not all organizations are allowed to use such a license.
+For example, Germany doesn't recognize the Public Domain and one is not allowed to use libraries under such license (or similar).
+
+Thus, the library is now dual licensed,
+and one is allowed to choose which license they would like to use.
+
+##################################################
+License Option #1 :
+##################################################
+
+Public Domain
+
+##################################################
+License Option #2 :
+##################################################
+
+Software License Agreement (BSD License)
+
+Copyright (c) 2017, Deusty, LLC
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the following conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Neither the name of Deusty LLC nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of Deusty LLC.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
\ No newline at end of file
diff --git a/Pods/CocoaAsyncSocket/README.markdown b/Pods/CocoaAsyncSocket/README.markdown
new file mode 100644
index 0000000..4776884
--- /dev/null
+++ b/Pods/CocoaAsyncSocket/README.markdown
@@ -0,0 +1,115 @@
+# CocoaAsyncSocket
+[![Build Status](https://travis-ci.org/robbiehanson/CocoaAsyncSocket.svg?branch=master)](https://travis-ci.org/robbiehanson/CocoaAsyncSocket) [![Version Status](https://img.shields.io/cocoapods/v/CocoaAsyncSocket.svg?style=flat)](http://cocoadocs.org/docsets/CocoaAsyncSocket) [![Carthage compatible](https://img.shields.io/badge/Carthage-compatible-4BC51D.svg?style=flat)](https://github.com/Carthage/Carthage) [![Platform](http://img.shields.io/cocoapods/p/CocoaAsyncSocket.svg?style=flat)](http://cocoapods.org/?q=CocoaAsyncSocket) [![license Public Domain](https://img.shields.io/badge/license-Public%20Domain-orange.svg?style=flat)](https://en.wikipedia.org/wiki/Public_domain)
+
+
+CocoaAsyncSocket provides easy-to-use and powerful asynchronous socket libraries for Mac and iOS. The classes are described below.
+
+## Installation
+
+#### CocoaPods
+
+Install using [CocoaPods](http://cocoapods.org) by adding this line to your Podfile:
+
+````ruby
+use_frameworks! # Add this if you are targeting iOS 8+ or using Swift
+pod 'CocoaAsyncSocket'  
+````
+
+#### Carthage
+
+CocoaAsyncSocket is [Carthage](https://github.com/Carthage/Carthage) compatible. To include it add the following line to your `Cartfile`
+
+```bash
+github "robbiehanson/CocoaAsyncSocket" "master"
+```
+
+The project is currently configured to build for **iOS**, **tvOS** and **Mac**.  After building with carthage the resultant frameworks will be stored in:
+
+* `Carthage/Build/iOS/CocoaAsyncSocket.framework`
+* `Carthage/Build/tvOS/CocoaAsyncSocket.framework`
+* `Carthage/Build/Mac/CocoaAsyncSocket.framework`
+
+Select the correct framework(s) and drag it into your project.
+
+#### Manual
+
+You can also include it into your project by adding the source files directly, but you should probably be using a dependency manager to keep up to date.
+
+### Importing
+
+Using Objective-C:
+
+```obj-c
+// When using iOS 8+ frameworks
+@import CocoaAsyncSocket; 
+
+// OR when not using frameworks, targeting iOS 7 or below
+#import "GCDAsyncSocket.h" // for TCP
+#import "GCDAsyncUdpSocket.h" // for UDP
+```
+
+Using Swift:
+
+```swift
+import CocoaAsyncSocket
+```
+
+## TCP
+
+**GCDAsyncSocket** is a TCP/IP socket networking library built atop Grand Central Dispatch. Here are the key features available:
+
+- Native objective-c, fully self-contained in one class.<br/>
+  _No need to muck around with sockets or streams. This class handles everything for you._
+
+- Full delegate support<br/>
+  _Errors, connections, read completions, write completions, progress, and disconnections all result in a call to your delegate method._
+
+- Queued non-blocking reads and writes, with optional timeouts.<br/>
+  _You tell it what to read or write, and it handles everything for you. Queueing, buffering, and searching for termination sequences within the stream - all handled for you automatically._
+
+- Automatic socket acceptance.<br/>
+  _Spin up a server socket, tell it to accept connections, and it will call you with new instances of itself for each connection._
+
+- Support for TCP streams over IPv4 and IPv6.<br/>
+  _Automatically connect to IPv4 or IPv6 hosts. Automatically accept incoming connections over both IPv4 and IPv6 with a single instance of this class. No more worrying about multiple sockets._
+
+- Support for TLS / SSL<br/>
+  _Secure your socket with ease using just a single method call. Available for both client and server sockets._
+
+- Fully GCD based and Thread-Safe<br/>
+  _It runs entirely within its own GCD dispatch_queue, and is completely thread-safe. Further, the delegate methods are all invoked asynchronously onto a dispatch_queue of your choosing. This means parallel operation of your socket code, and your delegate/processing code._
+
+- The Latest Technology & Performance Optimizations<br/>
+  _Internally the library takes advantage of technologies such as [kqueue's](http://en.wikipedia.org/wiki/Kqueue) to limit [system calls](http://en.wikipedia.org/wiki/System_call) and optimize buffer allocations. In other words, peak performance._
+
+## UDP
+
+**GCDAsyncUdpSocket** is a UDP/IP socket networking library built atop Grand Central Dispatch. Here are the key features available:
+
+- Native objective-c, fully self-contained in one class.<br/>
+  _No need to muck around with low-level sockets. This class handles everything for you._
+
+- Full delegate support.<br/>
+  _Errors, send completions, receive completions, and disconnections all result in a call to your delegate method._
+
+- Queued non-blocking send and receive operations, with optional timeouts.<br/>
+  _You tell it what to send or receive, and it handles everything for you. Queueing, buffering, waiting and checking errno - all handled for you automatically._
+
+- Support for IPv4 and IPv6.<br/>
+  _Automatically send/recv using IPv4 and/or IPv6. No more worrying about multiple sockets._
+
+- Fully GCD based and Thread-Safe<br/>
+  _It runs entirely within its own GCD dispatch_queue, and is completely thread-safe. Further, the delegate methods are all invoked asynchronously onto a dispatch_queue of your choosing. This means parallel operation of your socket code, and your delegate/processing code._
+
+***
+
+For those new(ish) to networking, it's recommended you **[read the wiki](https://github.com/robbiehanson/CocoaAsyncSocket/wiki)**.<br/>_Sockets might not work exactly like you think they do..._
+
+**Still got questions?** Try the **[CocoaAsyncSocket Mailing List](http://groups.google.com/group/cocoaasyncsocket)**.
+***
+
+Love the project? Wanna buy me a ☕️&nbsp;&nbsp;? (or a 🍺&nbsp;&nbsp;😀&nbsp;):
+
+[![donation-bitcoin](https://bitpay.com/img/donate-sm.png)](https://onename.com/robbiehanson)
+[![donation-paypal](https://www.paypal.com/en_US/i/btn/btn_donate_SM.gif)](https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=2M8C699FQ8AW2)
+
diff --git a/Pods/CocoaAsyncSocket/Source/GCD/GCDAsyncSocket.h b/Pods/CocoaAsyncSocket/Source/GCD/GCDAsyncSocket.h
new file mode 100644
index 0000000..bf285b3
--- /dev/null
+++ b/Pods/CocoaAsyncSocket/Source/GCD/GCDAsyncSocket.h
@@ -0,0 +1,1219 @@
+//  
+//  GCDAsyncSocket.h
+//  
+//  This class is in the public domain.
+//  Originally created by Robbie Hanson in Q3 2010.
+//  Updated and maintained by Deusty LLC and the Apple development community.
+//  
+//  https://github.com/robbiehanson/CocoaAsyncSocket
+//
+
+#import <Foundation/Foundation.h>
+#import <Security/Security.h>
+#import <Security/SecureTransport.h>
+#import <dispatch/dispatch.h>
+#import <Availability.h>
+
+#include <sys/socket.h> // AF_INET, AF_INET6
+
+@class GCDAsyncReadPacket;
+@class GCDAsyncWritePacket;
+@class GCDAsyncSocketPreBuffer;
+@protocol GCDAsyncSocketDelegate;
+
+NS_ASSUME_NONNULL_BEGIN
+
+extern NSString *const GCDAsyncSocketException;
+extern NSString *const GCDAsyncSocketErrorDomain;
+
+extern NSString *const GCDAsyncSocketQueueName;
+extern NSString *const GCDAsyncSocketThreadName;
+
+extern NSString *const GCDAsyncSocketManuallyEvaluateTrust;
+#if TARGET_OS_IPHONE
+extern NSString *const GCDAsyncSocketUseCFStreamForTLS;
+#endif
+#define GCDAsyncSocketSSLPeerName     (NSString *)kCFStreamSSLPeerName
+#define GCDAsyncSocketSSLCertificates (NSString *)kCFStreamSSLCertificates
+#define GCDAsyncSocketSSLIsServer     (NSString *)kCFStreamSSLIsServer
+extern NSString *const GCDAsyncSocketSSLPeerID;
+extern NSString *const GCDAsyncSocketSSLProtocolVersionMin;
+extern NSString *const GCDAsyncSocketSSLProtocolVersionMax;
+extern NSString *const GCDAsyncSocketSSLSessionOptionFalseStart;
+extern NSString *const GCDAsyncSocketSSLSessionOptionSendOneByteRecord;
+extern NSString *const GCDAsyncSocketSSLCipherSuites;
+#if !TARGET_OS_IPHONE
+extern NSString *const GCDAsyncSocketSSLDiffieHellmanParameters;
+#endif
+
+#define GCDAsyncSocketLoggingContext 65535
+
+
+typedef NS_ENUM(NSInteger, GCDAsyncSocketError) {
+	GCDAsyncSocketNoError = 0,           // Never used
+	GCDAsyncSocketBadConfigError,        // Invalid configuration
+	GCDAsyncSocketBadParamError,         // Invalid parameter was passed
+	GCDAsyncSocketConnectTimeoutError,   // A connect operation timed out
+	GCDAsyncSocketReadTimeoutError,      // A read operation timed out
+	GCDAsyncSocketWriteTimeoutError,     // A write operation timed out
+	GCDAsyncSocketReadMaxedOutError,     // Reached set maxLength without completing
+	GCDAsyncSocketClosedError,           // The remote peer closed the connection
+	GCDAsyncSocketOtherError,            // Description provided in userInfo
+};
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+#pragma mark -
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+
+@interface GCDAsyncSocket : NSObject
+
+/**
+ * GCDAsyncSocket uses the standard delegate paradigm,
+ * but executes all delegate callbacks on a given delegate dispatch queue.
+ * This allows for maximum concurrency, while at the same time providing easy thread safety.
+ * 
+ * You MUST set a delegate AND delegate dispatch queue before attempting to
+ * use the socket, or you will get an error.
+ * 
+ * The socket queue is optional.
+ * If you pass NULL, GCDAsyncSocket will automatically create it's own socket queue.
+ * If you choose to provide a socket queue, the socket queue must not be a concurrent queue.
+ * If you choose to provide a socket queue, and the socket queue has a configured target queue,
+ * then please see the discussion for the method markSocketQueueTargetQueue.
+ * 
+ * The delegate queue and socket queue can optionally be the same.
+**/
+- (instancetype)init;
+- (instancetype)initWithSocketQueue:(nullable dispatch_queue_t)sq;
+- (instancetype)initWithDelegate:(nullable id<GCDAsyncSocketDelegate>)aDelegate delegateQueue:(nullable dispatch_queue_t)dq;
+- (instancetype)initWithDelegate:(nullable id<GCDAsyncSocketDelegate>)aDelegate delegateQueue:(nullable dispatch_queue_t)dq socketQueue:(nullable dispatch_queue_t)sq;
+
+/**
+ * Create GCDAsyncSocket from already connect BSD socket file descriptor
+**/
++ (nullable instancetype)socketFromConnectedSocketFD:(int)socketFD socketQueue:(nullable dispatch_queue_t)sq error:(NSError**)error;
+
++ (nullable instancetype)socketFromConnectedSocketFD:(int)socketFD delegate:(nullable id<GCDAsyncSocketDelegate>)aDelegate delegateQueue:(nullable dispatch_queue_t)dq error:(NSError**)error;
+
++ (nullable instancetype)socketFromConnectedSocketFD:(int)socketFD delegate:(nullable id<GCDAsyncSocketDelegate>)aDelegate delegateQueue:(nullable dispatch_queue_t)dq socketQueue:(nullable dispatch_queue_t)sq error:(NSError **)error;
+
+#pragma mark Configuration
+
+@property (atomic, weak, readwrite, nullable) id<GCDAsyncSocketDelegate> delegate;
+#if OS_OBJECT_USE_OBJC
+@property (atomic, strong, readwrite, nullable) dispatch_queue_t delegateQueue;
+#else
+@property (atomic, assign, readwrite, nullable) dispatch_queue_t delegateQueue;
+#endif
+
+- (void)getDelegate:(id<GCDAsyncSocketDelegate> __nullable * __nullable)delegatePtr delegateQueue:(dispatch_queue_t __nullable * __nullable)delegateQueuePtr;
+- (void)setDelegate:(nullable id<GCDAsyncSocketDelegate>)delegate delegateQueue:(nullable dispatch_queue_t)delegateQueue;
+
+/**
+ * If you are setting the delegate to nil within the delegate's dealloc method,
+ * you may need to use the synchronous versions below.
+**/
+- (void)synchronouslySetDelegate:(nullable id<GCDAsyncSocketDelegate>)delegate;
+- (void)synchronouslySetDelegateQueue:(nullable dispatch_queue_t)delegateQueue;
+- (void)synchronouslySetDelegate:(nullable id<GCDAsyncSocketDelegate>)delegate delegateQueue:(nullable dispatch_queue_t)delegateQueue;
+
+/**
+ * By default, both IPv4 and IPv6 are enabled.
+ * 
+ * For accepting incoming connections, this means GCDAsyncSocket automatically supports both protocols,
+ * and can simulataneously accept incoming connections on either protocol.
+ * 
+ * For outgoing connections, this means GCDAsyncSocket can connect to remote hosts running either protocol.
+ * If a DNS lookup returns only IPv4 results, GCDAsyncSocket will automatically use IPv4.
+ * If a DNS lookup returns only IPv6 results, GCDAsyncSocket will automatically use IPv6.
+ * If a DNS lookup returns both IPv4 and IPv6 results, the preferred protocol will be chosen.
+ * By default, the preferred protocol is IPv4, but may be configured as desired.
+**/
+
+@property (atomic, assign, readwrite, getter=isIPv4Enabled) BOOL IPv4Enabled;
+@property (atomic, assign, readwrite, getter=isIPv6Enabled) BOOL IPv6Enabled;
+
+@property (atomic, assign, readwrite, getter=isIPv4PreferredOverIPv6) BOOL IPv4PreferredOverIPv6;
+
+/** 
+ * When connecting to both IPv4 and IPv6 using Happy Eyeballs (RFC 6555) https://tools.ietf.org/html/rfc6555
+ * this is the delay between connecting to the preferred protocol and the fallback protocol.
+ *
+ * Defaults to 300ms.
+**/
+@property (atomic, assign, readwrite) NSTimeInterval alternateAddressDelay;
+
+/**
+ * User data allows you to associate arbitrary information with the socket.
+ * This data is not used internally by socket in any way.
+**/
+@property (atomic, strong, readwrite, nullable) id userData;
+
+#pragma mark Accepting
+
+/**
+ * Tells the socket to begin listening and accepting connections on the given port.
+ * When a connection is accepted, a new instance of GCDAsyncSocket will be spawned to handle it,
+ * and the socket:didAcceptNewSocket: delegate method will be invoked.
+ * 
+ * The socket will listen on all available interfaces (e.g. wifi, ethernet, etc)
+**/
+- (BOOL)acceptOnPort:(uint16_t)port error:(NSError **)errPtr;
+
+/**
+ * This method is the same as acceptOnPort:error: with the
+ * additional option of specifying which interface to listen on.
+ * 
+ * For example, you could specify that the socket should only accept connections over ethernet,
+ * and not other interfaces such as wifi.
+ * 
+ * The interface may be specified by name (e.g. "en1" or "lo0") or by IP address (e.g. "192.168.4.34").
+ * You may also use the special strings "localhost" or "loopback" to specify that
+ * the socket only accept connections from the local machine.
+ * 
+ * You can see the list of interfaces via the command line utility "ifconfig",
+ * or programmatically via the getifaddrs() function.
+ * 
+ * To accept connections on any interface pass nil, or simply use the acceptOnPort:error: method.
+**/
+- (BOOL)acceptOnInterface:(nullable NSString *)interface port:(uint16_t)port error:(NSError **)errPtr;
+
+/**
+ * Tells the socket to begin listening and accepting connections on the unix domain at the given url.
+ * When a connection is accepted, a new instance of GCDAsyncSocket will be spawned to handle it,
+ * and the socket:didAcceptNewSocket: delegate method will be invoked.
+ *
+ * The socket will listen on all available interfaces (e.g. wifi, ethernet, etc)
+ **/
+- (BOOL)acceptOnUrl:(NSURL *)url error:(NSError **)errPtr;
+
+#pragma mark Connecting
+
+/**
+ * Connects to the given host and port.
+ * 
+ * This method invokes connectToHost:onPort:viaInterface:withTimeout:error:
+ * and uses the default interface, and no timeout.
+**/
+- (BOOL)connectToHost:(NSString *)host onPort:(uint16_t)port error:(NSError **)errPtr;
+
+/**
+ * Connects to the given host and port with an optional timeout.
+ * 
+ * This method invokes connectToHost:onPort:viaInterface:withTimeout:error: and uses the default interface.
+**/
+- (BOOL)connectToHost:(NSString *)host
+               onPort:(uint16_t)port
+          withTimeout:(NSTimeInterval)timeout
+                error:(NSError **)errPtr;
+
+/**
+ * Connects to the given host & port, via the optional interface, with an optional timeout.
+ * 
+ * The host may be a domain name (e.g. "deusty.com") or an IP address string (e.g. "192.168.0.2").
+ * The host may also be the special strings "localhost" or "loopback" to specify connecting
+ * to a service on the local machine.
+ * 
+ * The interface may be a name (e.g. "en1" or "lo0") or the corresponding IP address (e.g. "192.168.4.35").
+ * The interface may also be used to specify the local port (see below).
+ * 
+ * To not time out use a negative time interval.
+ * 
+ * This method will return NO if an error is detected, and set the error pointer (if one was given).
+ * Possible errors would be a nil host, invalid interface, or socket is already connected.
+ * 
+ * If no errors are detected, this method will start a background connect operation and immediately return YES.
+ * The delegate callbacks are used to notify you when the socket connects, or if the host was unreachable.
+ * 
+ * Since this class supports queued reads and writes, you can immediately start reading and/or writing.
+ * All read/write operations will be queued, and upon socket connection,
+ * the operations will be dequeued and processed in order.
+ * 
+ * The interface may optionally contain a port number at the end of the string, separated by a colon.
+ * This allows you to specify the local port that should be used for the outgoing connection. (read paragraph to end)
+ * To specify both interface and local port: "en1:8082" or "192.168.4.35:2424".
+ * To specify only local port: ":8082".
+ * Please note this is an advanced feature, and is somewhat hidden on purpose.
+ * You should understand that 99.999% of the time you should NOT specify the local port for an outgoing connection.
+ * If you think you need to, there is a very good chance you have a fundamental misunderstanding somewhere.
+ * Local ports do NOT need to match remote ports. In fact, they almost never do.
+ * This feature is here for networking professionals using very advanced techniques.
+**/
+- (BOOL)connectToHost:(NSString *)host
+               onPort:(uint16_t)port
+         viaInterface:(nullable NSString *)interface
+          withTimeout:(NSTimeInterval)timeout
+                error:(NSError **)errPtr;
+
+/**
+ * Connects to the given address, specified as a sockaddr structure wrapped in a NSData object.
+ * For example, a NSData object returned from NSNetService's addresses method.
+ * 
+ * If you have an existing struct sockaddr you can convert it to a NSData object like so:
+ * struct sockaddr sa  -> NSData *dsa = [NSData dataWithBytes:&remoteAddr length:remoteAddr.sa_len];
+ * struct sockaddr *sa -> NSData *dsa = [NSData dataWithBytes:remoteAddr length:remoteAddr->sa_len];
+ * 
+ * This method invokes connectToAdd
+**/
+- (BOOL)connectToAddress:(NSData *)remoteAddr error:(NSError **)errPtr;
+
+/**
+ * This method is the same as connectToAddress:error: with an additional timeout option.
+ * To not time out use a negative time interval, or simply use the connectToAddress:error: method.
+**/
+- (BOOL)connectToAddress:(NSData *)remoteAddr withTimeout:(NSTimeInterval)timeout error:(NSError **)errPtr;
+
+/**
+ * Connects to the given address, using the specified interface and timeout.
+ * 
+ * The address is specified as a sockaddr structure wrapped in a NSData object.
+ * For example, a NSData object returned from NSNetService's addresses method.
+ * 
+ * If you have an existing struct sockaddr you can convert it to a NSData object like so:
+ * struct sockaddr sa  -> NSData *dsa = [NSData dataWithBytes:&remoteAddr length:remoteAddr.sa_len];
+ * struct sockaddr *sa -> NSData *dsa = [NSData dataWithBytes:remoteAddr length:remoteAddr->sa_len];
+ * 
+ * The interface may be a name (e.g. "en1" or "lo0") or the corresponding IP address (e.g. "192.168.4.35").
+ * The interface may also be used to specify the local port (see below).
+ * 
+ * The timeout is optional. To not time out use a negative time interval.
+ * 
+ * This method will return NO if an error is detected, and set the error pointer (if one was given).
+ * Possible errors would be a nil host, invalid interface, or socket is already connected.
+ * 
+ * If no errors are detected, this method will start a background connect operation and immediately return YES.
+ * The delegate callbacks are used to notify you when the socket connects, or if the host was unreachable.
+ * 
+ * Since this class supports queued reads and writes, you can immediately start reading and/or writing.
+ * All read/write operations will be queued, and upon socket connection,
+ * the operations will be dequeued and processed in order.
+ * 
+ * The interface may optionally contain a port number at the end of the string, separated by a colon.
+ * This allows you to specify the local port that should be used for the outgoing connection. (read paragraph to end)
+ * To specify both interface and local port: "en1:8082" or "192.168.4.35:2424".
+ * To specify only local port: ":8082".
+ * Please note this is an advanced feature, and is somewhat hidden on purpose.
+ * You should understand that 99.999% of the time you should NOT specify the local port for an outgoing connection.
+ * If you think you need to, there is a very good chance you have a fundamental misunderstanding somewhere.
+ * Local ports do NOT need to match remote ports. In fact, they almost never do.
+ * This feature is here for networking professionals using very advanced techniques.
+**/
+- (BOOL)connectToAddress:(NSData *)remoteAddr
+            viaInterface:(nullable NSString *)interface
+             withTimeout:(NSTimeInterval)timeout
+                   error:(NSError **)errPtr;
+/**
+ * Connects to the unix domain socket at the given url, using the specified timeout.
+ */
+- (BOOL)connectToUrl:(NSURL *)url withTimeout:(NSTimeInterval)timeout error:(NSError **)errPtr;
+
+#pragma mark Disconnecting
+
+/**
+ * Disconnects immediately (synchronously). Any pending reads or writes are dropped.
+ * 
+ * If the socket is not already disconnected, an invocation to the socketDidDisconnect:withError: delegate method
+ * will be queued onto the delegateQueue asynchronously (behind any previously queued delegate methods).
+ * In other words, the disconnected delegate method will be invoked sometime shortly after this method returns.
+ * 
+ * Please note the recommended way of releasing a GCDAsyncSocket instance (e.g. in a dealloc method)
+ * [asyncSocket setDelegate:nil];
+ * [asyncSocket disconnect];
+ * [asyncSocket release];
+ * 
+ * If you plan on disconnecting the socket, and then immediately asking it to connect again,
+ * you'll likely want to do so like this:
+ * [asyncSocket setDelegate:nil];
+ * [asyncSocket disconnect];
+ * [asyncSocket setDelegate:self];
+ * [asyncSocket connect...];
+**/
+- (void)disconnect;
+
+/**
+ * Disconnects after all pending reads have completed.
+ * After calling this, the read and write methods will do nothing.
+ * The socket will disconnect even if there are still pending writes.
+**/
+- (void)disconnectAfterReading;
+
+/**
+ * Disconnects after all pending writes have completed.
+ * After calling this, the read and write methods will do nothing.
+ * The socket will disconnect even if there are still pending reads.
+**/
+- (void)disconnectAfterWriting;
+
+/**
+ * Disconnects after all pending reads and writes have completed.
+ * After calling this, the read and write methods will do nothing.
+**/
+- (void)disconnectAfterReadingAndWriting;
+
+#pragma mark Diagnostics
+
+/**
+ * Returns whether the socket is disconnected or connected.
+ * 
+ * A disconnected socket may be recycled.
+ * That is, it can be used again for connecting or listening.
+ * 
+ * If a socket is in the process of connecting, it may be neither disconnected nor connected.
+**/
+@property (atomic, readonly) BOOL isDisconnected;
+@property (atomic, readonly) BOOL isConnected;
+
+/**
+ * Returns the local or remote host and port to which this socket is connected, or nil and 0 if not connected.
+ * The host will be an IP address.
+**/
+@property (atomic, readonly, nullable) NSString *connectedHost;
+@property (atomic, readonly) uint16_t  connectedPort;
+@property (atomic, readonly, nullable) NSURL    *connectedUrl;
+
+@property (atomic, readonly, nullable) NSString *localHost;
+@property (atomic, readonly) uint16_t  localPort;
+
+/**
+ * Returns the local or remote address to which this socket is connected,
+ * specified as a sockaddr structure wrapped in a NSData object.
+ * 
+ * @seealso connectedHost
+ * @seealso connectedPort
+ * @seealso localHost
+ * @seealso localPort
+**/
+@property (atomic, readonly, nullable) NSData *connectedAddress;
+@property (atomic, readonly, nullable) NSData *localAddress;
+
+/**
+ * Returns whether the socket is IPv4 or IPv6.
+ * An accepting socket may be both.
+**/
+@property (atomic, readonly) BOOL isIPv4;
+@property (atomic, readonly) BOOL isIPv6;
+
+/**
+ * Returns whether or not the socket has been secured via SSL/TLS.
+ * 
+ * See also the startTLS method.
+**/
+@property (atomic, readonly) BOOL isSecure;
+
+#pragma mark Reading
+
+// The readData and writeData methods won't block (they are asynchronous).
+// 
+// When a read is complete the socket:didReadData:withTag: delegate method is dispatched on the delegateQueue.
+// When a write is complete the socket:didWriteDataWithTag: delegate method is dispatched on the delegateQueue.
+// 
+// You may optionally set a timeout for any read/write operation. (To not timeout, use a negative time interval.)
+// If a read/write opertion times out, the corresponding "socket:shouldTimeout..." delegate method
+// is called to optionally allow you to extend the timeout.
+// Upon a timeout, the "socket:didDisconnectWithError:" method is called
+// 
+// The tag is for your convenience.
+// You can use it as an array index, step number, state id, pointer, etc.
+
+/**
+ * Reads the first available bytes that become available on the socket.
+ * 
+ * If the timeout value is negative, the read operation will not use a timeout.
+**/
+- (void)readDataWithTimeout:(NSTimeInterval)timeout tag:(long)tag;
+
+/**
+ * Reads the first available bytes that become available on the socket.
+ * The bytes will be appended to the given byte buffer starting at the given offset.
+ * The given buffer will automatically be increased in size if needed.
+ * 
+ * If the timeout value is negative, the read operation will not use a timeout.
+ * If the buffer if nil, the socket will create a buffer for you.
+ * 
+ * If the bufferOffset is greater than the length of the given buffer,
+ * the method will do nothing, and the delegate will not be called.
+ * 
+ * If you pass a buffer, you must not alter it in any way while the socket is using it.
+ * After completion, the data returned in socket:didReadData:withTag: will be a subset of the given buffer.
+ * That is, it will reference the bytes that were appended to the given buffer via
+ * the method [NSData dataWithBytesNoCopy:length:freeWhenDone:NO].
+**/
+- (void)readDataWithTimeout:(NSTimeInterval)timeout
+					 buffer:(nullable NSMutableData *)buffer
+			   bufferOffset:(NSUInteger)offset
+						tag:(long)tag;
+
+/**
+ * Reads the first available bytes that become available on the socket.
+ * The bytes will be appended to the given byte buffer starting at the given offset.
+ * The given buffer will automatically be increased in size if needed.
+ * A maximum of length bytes will be read.
+ * 
+ * If the timeout value is negative, the read operation will not use a timeout.
+ * If the buffer if nil, a buffer will automatically be created for you.
+ * If maxLength is zero, no length restriction is enforced.
+ * 
+ * If the bufferOffset is greater than the length of the given buffer,
+ * the method will do nothing, and the delegate will not be called.
+ * 
+ * If you pass a buffer, you must not alter it in any way while the socket is using it.
+ * After completion, the data returned in socket:didReadData:withTag: will be a subset of the given buffer.
+ * That is, it will reference the bytes that were appended to the given buffer  via
+ * the method [NSData dataWithBytesNoCopy:length:freeWhenDone:NO].
+**/
+- (void)readDataWithTimeout:(NSTimeInterval)timeout
+                     buffer:(nullable NSMutableData *)buffer
+               bufferOffset:(NSUInteger)offset
+                  maxLength:(NSUInteger)length
+                        tag:(long)tag;
+
+/**
+ * Reads the given number of bytes.
+ * 
+ * If the timeout value is negative, the read operation will not use a timeout.
+ * 
+ * If the length is 0, this method does nothing and the delegate is not called.
+**/
+- (void)readDataToLength:(NSUInteger)length withTimeout:(NSTimeInterval)timeout tag:(long)tag;
+
+/**
+ * Reads the given number of bytes.
+ * The bytes will be appended to the given byte buffer starting at the given offset.
+ * The given buffer will automatically be increased in size if needed.
+ * 
+ * If the timeout value is negative, the read operation will not use a timeout.
+ * If the buffer if nil, a buffer will automatically be created for you.
+ * 
+ * If the length is 0, this method does nothing and the delegate is not called.
+ * If the bufferOffset is greater than the length of the given buffer,
+ * the method will do nothing, and the delegate will not be called.
+ * 
+ * If you pass a buffer, you must not alter it in any way while AsyncSocket is using it.
+ * After completion, the data returned in socket:didReadData:withTag: will be a subset of the given buffer.
+ * That is, it will reference the bytes that were appended to the given buffer via
+ * the method [NSData dataWithBytesNoCopy:length:freeWhenDone:NO].
+**/
+- (void)readDataToLength:(NSUInteger)length
+             withTimeout:(NSTimeInterval)timeout
+                  buffer:(nullable NSMutableData *)buffer
+            bufferOffset:(NSUInteger)offset
+                     tag:(long)tag;
+
+/**
+ * Reads bytes until (and including) the passed "data" parameter, which acts as a separator.
+ * 
+ * If the timeout value is negative, the read operation will not use a timeout.
+ * 
+ * If you pass nil or zero-length data as the "data" parameter,
+ * the method will do nothing (except maybe print a warning), and the delegate will not be called.
+ * 
+ * To read a line from the socket, use the line separator (e.g. CRLF for HTTP, see below) as the "data" parameter.
+ * If you're developing your own custom protocol, be sure your separator can not occur naturally as
+ * part of the data between separators.
+ * For example, imagine you want to send several small documents over a socket.
+ * Using CRLF as a separator is likely unwise, as a CRLF could easily exist within the documents.
+ * In this particular example, it would be better to use a protocol similar to HTTP with
+ * a header that includes the length of the document.
+ * Also be careful that your separator cannot occur naturally as part of the encoding for a character.
+ * 
+ * The given data (separator) parameter should be immutable.
+ * For performance reasons, the socket will retain it, not copy it.
+ * So if it is immutable, don't modify it while the socket is using it.
+**/
+- (void)readDataToData:(NSData *)data withTimeout:(NSTimeInterval)timeout tag:(long)tag;
+
+/**
+ * Reads bytes until (and including) the passed "data" parameter, which acts as a separator.
+ * The bytes will be appended to the given byte buffer starting at the given offset.
+ * The given buffer will automatically be increased in size if needed.
+ * 
+ * If the timeout value is negative, the read operation will not use a timeout.
+ * If the buffer if nil, a buffer will automatically be created for you.
+ * 
+ * If the bufferOffset is greater than the length of the given buffer,
+ * the method will do nothing (except maybe print a warning), and the delegate will not be called.
+ * 
+ * If you pass a buffer, you must not alter it in any way while the socket is using it.
+ * After completion, the data returned in socket:didReadData:withTag: will be a subset of the given buffer.
+ * That is, it will reference the bytes that were appended to the given buffer via
+ * the method [NSData dataWithBytesNoCopy:length:freeWhenDone:NO].
+ * 
+ * To read a line from the socket, use the line separator (e.g. CRLF for HTTP, see below) as the "data" parameter.
+ * If you're developing your own custom protocol, be sure your separator can not occur naturally as
+ * part of the data between separators.
+ * For example, imagine you want to send several small documents over a socket.
+ * Using CRLF as a separator is likely unwise, as a CRLF could easily exist within the documents.
+ * In this particular example, it would be better to use a protocol similar to HTTP with
+ * a header that includes the length of the document.
+ * Also be careful that your separator cannot occur naturally as part of the encoding for a character.
+ * 
+ * The given data (separator) parameter should be immutable.
+ * For performance reasons, the socket will retain it, not copy it.
+ * So if it is immutable, don't modify it while the socket is using it.
+**/
+- (void)readDataToData:(NSData *)data
+           withTimeout:(NSTimeInterval)timeout
+                buffer:(nullable NSMutableData *)buffer
+          bufferOffset:(NSUInteger)offset
+                   tag:(long)tag;
+
+/**
+ * Reads bytes until (and including) the passed "data" parameter, which acts as a separator.
+ * 
+ * If the timeout value is negative, the read operation will not use a timeout.
+ * 
+ * If maxLength is zero, no length restriction is enforced.
+ * Otherwise if maxLength bytes are read without completing the read,
+ * it is treated similarly to a timeout - the socket is closed with a GCDAsyncSocketReadMaxedOutError.
+ * The read will complete successfully if exactly maxLength bytes are read and the given data is found at the end.
+ * 
+ * If you pass nil or zero-length data as the "data" parameter,
+ * the method will do nothing (except maybe print a warning), and the delegate will not be called.
+ * If you pass a maxLength parameter that is less than the length of the data parameter,
+ * the method will do nothing (except maybe print a warning), and the delegate will not be called.
+ * 
+ * To read a line from the socket, use the line separator (e.g. CRLF for HTTP, see below) as the "data" parameter.
+ * If you're developing your own custom protocol, be sure your separator can not occur naturally as
+ * part of the data between separators.
+ * For example, imagine you want to send several small documents over a socket.
+ * Using CRLF as a separator is likely unwise, as a CRLF could easily exist within the documents.
+ * In this particular example, it would be better to use a protocol similar to HTTP with
+ * a header that includes the length of the document.
+ * Also be careful that your separator cannot occur naturally as part of the encoding for a character.
+ * 
+ * The given data (separator) parameter should be immutable.
+ * For performance reasons, the socket will retain it, not copy it.
+ * So if it is immutable, don't modify it while the socket is using it.
+**/
+- (void)readDataToData:(NSData *)data withTimeout:(NSTimeInterval)timeout maxLength:(NSUInteger)length tag:(long)tag;
+
+/**
+ * Reads bytes until (and including) the passed "data" parameter, which acts as a separator.
+ * The bytes will be appended to the given byte buffer starting at the given offset.
+ * The given buffer will automatically be increased in size if needed.
+ * 
+ * If the timeout value is negative, the read operation will not use a timeout.
+ * If the buffer if nil, a buffer will automatically be created for you.
+ * 
+ * If maxLength is zero, no length restriction is enforced.
+ * Otherwise if maxLength bytes are read without completing the read,
+ * it is treated similarly to a timeout - the socket is closed with a GCDAsyncSocketReadMaxedOutError.
+ * The read will complete successfully if exactly maxLength bytes are read and the given data is found at the end.
+ * 
+ * If you pass a maxLength parameter that is less than the length of the data (separator) parameter,
+ * the method will do nothing (except maybe print a warning), and the delegate will not be called.
+ * If the bufferOffset is greater than the length of the given buffer,
+ * the method will do nothing (except maybe print a warning), and the delegate will not be called.
+ * 
+ * If you pass a buffer, you must not alter it in any way while the socket is using it.
+ * After completion, the data returned in socket:didReadData:withTag: will be a subset of the given buffer.
+ * That is, it will reference the bytes that were appended to the given buffer via
+ * the method [NSData dataWithBytesNoCopy:length:freeWhenDone:NO].
+ * 
+ * To read a line from the socket, use the line separator (e.g. CRLF for HTTP, see below) as the "data" parameter.
+ * If you're developing your own custom protocol, be sure your separator can not occur naturally as
+ * part of the data between separators.
+ * For example, imagine you want to send several small documents over a socket.
+ * Using CRLF as a separator is likely unwise, as a CRLF could easily exist within the documents.
+ * In this particular example, it would be better to use a protocol similar to HTTP with
+ * a header that includes the length of the document.
+ * Also be careful that your separator cannot occur naturally as part of the encoding for a character.
+ * 
+ * The given data (separator) parameter should be immutable.
+ * For performance reasons, the socket will retain it, not copy it.
+ * So if it is immutable, don't modify it while the socket is using it.
+**/
+- (void)readDataToData:(NSData *)data
+           withTimeout:(NSTimeInterval)timeout
+                buffer:(nullable NSMutableData *)buffer
+          bufferOffset:(NSUInteger)offset
+             maxLength:(NSUInteger)length
+                   tag:(long)tag;
+
+/**
+ * Returns progress of the current read, from 0.0 to 1.0, or NaN if no current read (use isnan() to check).
+ * The parameters "tag", "done" and "total" will be filled in if they aren't NULL.
+**/
+- (float)progressOfReadReturningTag:(nullable long *)tagPtr bytesDone:(nullable NSUInteger *)donePtr total:(nullable NSUInteger *)totalPtr;
+
+#pragma mark Writing
+
+/**
+ * Writes data to the socket, and calls the delegate when finished.
+ * 
+ * If you pass in nil or zero-length data, this method does nothing and the delegate will not be called.
+ * If the timeout value is negative, the write operation will not use a timeout.
+ * 
+ * Thread-Safety Note:
+ * If the given data parameter is mutable (NSMutableData) then you MUST NOT alter the data while
+ * the socket is writing it. In other words, it's not safe to alter the data until after the delegate method
+ * socket:didWriteDataWithTag: is invoked signifying that this particular write operation has completed.
+ * This is due to the fact that GCDAsyncSocket does NOT copy the data. It simply retains it.
+ * This is for performance reasons. Often times, if NSMutableData is passed, it is because
+ * a request/response was built up in memory. Copying this data adds an unwanted/unneeded overhead.
+ * If you need to write data from an immutable buffer, and you need to alter the buffer before the socket
+ * completes writing the bytes (which is NOT immediately after this method returns, but rather at a later time
+ * when the delegate method notifies you), then you should first copy the bytes, and pass the copy to this method.
+**/
+- (void)writeData:(NSData *)data withTimeout:(NSTimeInterval)timeout tag:(long)tag;
+
+/**
+ * Returns progress of the current write, from 0.0 to 1.0, or NaN if no current write (use isnan() to check).
+ * The parameters "tag", "done" and "total" will be filled in if they aren't NULL.
+**/
+- (float)progressOfWriteReturningTag:(nullable long *)tagPtr bytesDone:(nullable NSUInteger *)donePtr total:(nullable NSUInteger *)totalPtr;
+
+#pragma mark Security
+
+/**
+ * Secures the connection using SSL/TLS.
+ * 
+ * This method may be called at any time, and the TLS handshake will occur after all pending reads and writes
+ * are finished. This allows one the option of sending a protocol dependent StartTLS message, and queuing
+ * the upgrade to TLS at the same time, without having to wait for the write to finish.
+ * Any reads or writes scheduled after this method is called will occur over the secured connection.
+ *
+ * ==== The available TOP-LEVEL KEYS are:
+ * 
+ * - GCDAsyncSocketManuallyEvaluateTrust
+ *     The value must be of type NSNumber, encapsulating a BOOL value.
+ *     If you set this to YES, then the underlying SecureTransport system will not evaluate the SecTrustRef of the peer.
+ *     Instead it will pause at the moment evaulation would typically occur,
+ *     and allow us to handle the security evaluation however we see fit.
+ *     So GCDAsyncSocket will invoke the delegate method socket:shouldTrustPeer: passing the SecTrustRef.
+ *
+ *     Note that if you set this option, then all other configuration keys are ignored.
+ *     Evaluation will be completely up to you during the socket:didReceiveTrust:completionHandler: delegate method.
+ *
+ *     For more information on trust evaluation see:
+ *     Apple's Technical Note TN2232 - HTTPS Server Trust Evaluation
+ *     https://developer.apple.com/library/ios/technotes/tn2232/_index.html
+ *     
+ *     If unspecified, the default value is NO.
+ *
+ * - GCDAsyncSocketUseCFStreamForTLS (iOS only)
+ *     The value must be of type NSNumber, encapsulating a BOOL value.
+ *     By default GCDAsyncSocket will use the SecureTransport layer to perform encryption.
+ *     This gives us more control over the security protocol (many more configuration options),
+ *     plus it allows us to optimize things like sys calls and buffer allocation.
+ *     
+ *     However, if you absolutely must, you can instruct GCDAsyncSocket to use the old-fashioned encryption
+ *     technique by going through the CFStream instead. So instead of using SecureTransport, GCDAsyncSocket
+ *     will instead setup a CFRead/CFWriteStream. And then set the kCFStreamPropertySSLSettings property
+ *     (via CFReadStreamSetProperty / CFWriteStreamSetProperty) and will pass the given options to this method.
+ *     
+ *     Thus all the other keys in the given dictionary will be ignored by GCDAsyncSocket,
+ *     and will passed directly CFReadStreamSetProperty / CFWriteStreamSetProperty.
+ *     For more infomation on these keys, please see the documentation for kCFStreamPropertySSLSettings.
+ *
+ *     If unspecified, the default value is NO.
+ *
+ * ==== The available CONFIGURATION KEYS are:
+ *
+ * - kCFStreamSSLPeerName
+ *     The value must be of type NSString.
+ *     It should match the name in the X.509 certificate given by the remote party.
+ *     See Apple's documentation for SSLSetPeerDomainName.
+ *
+ * - kCFStreamSSLCertificates
+ *     The value must be of type NSArray.
+ *     See Apple's documentation for SSLSetCertificate.
+ *
+ * - kCFStreamSSLIsServer
+ *     The value must be of type NSNumber, encapsulationg a BOOL value.
+ *     See Apple's documentation for SSLCreateContext for iOS.
+ *     This is optional for iOS. If not supplied, a NO value is the default.
+ *     This is not needed for Mac OS X, and the value is ignored.
+ *
+ * - GCDAsyncSocketSSLPeerID
+ *     The value must be of type NSData.
+ *     You must set this value if you want to use TLS session resumption.
+ *     See Apple's documentation for SSLSetPeerID.
+ *
+ * - GCDAsyncSocketSSLProtocolVersionMin
+ * - GCDAsyncSocketSSLProtocolVersionMax
+ *     The value(s) must be of type NSNumber, encapsulting a SSLProtocol value.
+ *     See Apple's documentation for SSLSetProtocolVersionMin & SSLSetProtocolVersionMax.
+ *     See also the SSLProtocol typedef.
+ * 
+ * - GCDAsyncSocketSSLSessionOptionFalseStart
+ *     The value must be of type NSNumber, encapsulating a BOOL value.
+ *     See Apple's documentation for kSSLSessionOptionFalseStart.
+ * 
+ * - GCDAsyncSocketSSLSessionOptionSendOneByteRecord
+ *     The value must be of type NSNumber, encapsulating a BOOL value.
+ *     See Apple's documentation for kSSLSessionOptionSendOneByteRecord.
+ * 
+ * - GCDAsyncSocketSSLCipherSuites
+ *     The values must be of type NSArray.
+ *     Each item within the array must be a NSNumber, encapsulating
+ *     See Apple's documentation for SSLSetEnabledCiphers.
+ *     See also the SSLCipherSuite typedef.
+ *
+ * - GCDAsyncSocketSSLDiffieHellmanParameters (Mac OS X only)
+ *     The value must be of type NSData.
+ *     See Apple's documentation for SSLSetDiffieHellmanParams.
+ * 
+ * ==== The following UNAVAILABLE KEYS are: (with throw an exception)
+ * 
+ * - kCFStreamSSLAllowsAnyRoot (UNAVAILABLE)
+ *     You MUST use manual trust evaluation instead (see GCDAsyncSocketManuallyEvaluateTrust).
+ *     Corresponding deprecated method: SSLSetAllowsAnyRoot
+ * 
+ * - kCFStreamSSLAllowsExpiredRoots (UNAVAILABLE)
+ *     You MUST use manual trust evaluation instead (see GCDAsyncSocketManuallyEvaluateTrust).
+ *     Corresponding deprecated method: SSLSetAllowsExpiredRoots
+ *
+ * - kCFStreamSSLAllowsExpiredCertificates (UNAVAILABLE)
+ *     You MUST use manual trust evaluation instead (see GCDAsyncSocketManuallyEvaluateTrust).
+ *     Corresponding deprecated method: SSLSetAllowsExpiredCerts
+ *
+ * - kCFStreamSSLValidatesCertificateChain (UNAVAILABLE)
+ *     You MUST use manual trust evaluation instead (see GCDAsyncSocketManuallyEvaluateTrust).
+ *     Corresponding deprecated method: SSLSetEnableCertVerify
+ *
+ * - kCFStreamSSLLevel (UNAVAILABLE)
+ *     You MUST use GCDAsyncSocketSSLProtocolVersionMin & GCDAsyncSocketSSLProtocolVersionMin instead.
+ *     Corresponding deprecated method: SSLSetProtocolVersionEnabled
+ *
+ * 
+ * Please refer to Apple's documentation for corresponding SSLFunctions.
+ *
+ * If you pass in nil or an empty dictionary, the default settings will be used.
+ * 
+ * IMPORTANT SECURITY NOTE:
+ * The default settings will check to make sure the remote party's certificate is signed by a
+ * trusted 3rd party certificate agency (e.g. verisign) and that the certificate is not expired.
+ * However it will not verify the name on the certificate unless you
+ * give it a name to verify against via the kCFStreamSSLPeerName key.
+ * The security implications of this are important to understand.
+ * Imagine you are attempting to create a secure connection to MySecureServer.com,
+ * but your socket gets directed to MaliciousServer.com because of a hacked DNS server.
+ * If you simply use the default settings, and MaliciousServer.com has a valid certificate,
+ * the default settings will not detect any problems since the certificate is valid.
+ * To properly secure your connection in this particular scenario you
+ * should set the kCFStreamSSLPeerName property to "MySecureServer.com".
+ * 
+ * You can also perform additional validation in socketDidSecure.
+**/
+- (void)startTLS:(nullable NSDictionary <NSString*,NSObject*>*)tlsSettings;
+
+#pragma mark Advanced
+
+/**
+ * Traditionally sockets are not closed until the conversation is over.
+ * However, it is technically possible for the remote enpoint to close its write stream.
+ * Our socket would then be notified that there is no more data to be read,
+ * but our socket would still be writeable and the remote endpoint could continue to receive our data.
+ * 
+ * The argument for this confusing functionality stems from the idea that a client could shut down its
+ * write stream after sending a request to the server, thus notifying the server there are to be no further requests.
+ * In practice, however, this technique did little to help server developers.
+ * 
+ * To make matters worse, from a TCP perspective there is no way to tell the difference from a read stream close
+ * and a full socket close. They both result in the TCP stack receiving a FIN packet. The only way to tell
+ * is by continuing to write to the socket. If it was only a read stream close, then writes will continue to work.
+ * Otherwise an error will be occur shortly (when the remote end sends us a RST packet).
+ * 
+ * In addition to the technical challenges and confusion, many high level socket/stream API's provide
+ * no support for dealing with the problem. If the read stream is closed, the API immediately declares the
+ * socket to be closed, and shuts down the write stream as well. In fact, this is what Apple's CFStream API does.
+ * It might sound like poor design at first, but in fact it simplifies development.
+ * 
+ * The vast majority of the time if the read stream is closed it's because the remote endpoint closed its socket.
+ * Thus it actually makes sense to close the socket at this point.
+ * And in fact this is what most networking developers want and expect to happen.
+ * However, if you are writing a server that interacts with a plethora of clients,
+ * you might encounter a client that uses the discouraged technique of shutting down its write stream.
+ * If this is the case, you can set this property to NO,
+ * and make use of the socketDidCloseReadStream delegate method.
+ * 
+ * The default value is YES.
+**/
+@property (atomic, assign, readwrite) BOOL autoDisconnectOnClosedReadStream;
+
+/**
+ * GCDAsyncSocket maintains thread safety by using an internal serial dispatch_queue.
+ * In most cases, the instance creates this queue itself.
+ * However, to allow for maximum flexibility, the internal queue may be passed in the init method.
+ * This allows for some advanced options such as controlling socket priority via target queues.
+ * However, when one begins to use target queues like this, they open the door to some specific deadlock issues.
+ * 
+ * For example, imagine there are 2 queues:
+ * dispatch_queue_t socketQueue;
+ * dispatch_queue_t socketTargetQueue;
+ * 
+ * If you do this (pseudo-code):
+ * socketQueue.targetQueue = socketTargetQueue;
+ * 
+ * Then all socketQueue operations will actually get run on the given socketTargetQueue.
+ * This is fine and works great in most situations.
+ * But if you run code directly from within the socketTargetQueue that accesses the socket,
+ * you could potentially get deadlock. Imagine the following code:
+ * 
+ * - (BOOL)socketHasSomething
+ * {
+ *     __block BOOL result = NO;
+ *     dispatch_block_t block = ^{
+ *         result = [self someInternalMethodToBeRunOnlyOnSocketQueue];
+ *     }
+ *     if (is_executing_on_queue(socketQueue))
+ *         block();
+ *     else
+ *         dispatch_sync(socketQueue, block);
+ *     
+ *     return result;
+ * }
+ * 
+ * What happens if you call this method from the socketTargetQueue? The result is deadlock.
+ * This is because the GCD API offers no mechanism to discover a queue's targetQueue.
+ * Thus we have no idea if our socketQueue is configured with a targetQueue.
+ * If we had this information, we could easily avoid deadlock.
+ * But, since these API's are missing or unfeasible, you'll have to explicitly set it.
+ * 
+ * IF you pass a socketQueue via the init method,
+ * AND you've configured the passed socketQueue with a targetQueue,
+ * THEN you should pass the end queue in the target hierarchy.
+ * 
+ * For example, consider the following queue hierarchy:
+ * socketQueue -> ipQueue -> moduleQueue
+ *
+ * This example demonstrates priority shaping within some server.
+ * All incoming client connections from the same IP address are executed on the same target queue.
+ * And all connections for a particular module are executed on the same target queue.
+ * Thus, the priority of all networking for the entire module can be changed on the fly.
+ * Additionally, networking traffic from a single IP cannot monopolize the module.
+ * 
+ * Here's how you would accomplish something like that:
+ * - (dispatch_queue_t)newSocketQueueForConnectionFromAddress:(NSData *)address onSocket:(GCDAsyncSocket *)sock
+ * {
+ *     dispatch_queue_t socketQueue = dispatch_queue_create("", NULL);
+ *     dispatch_queue_t ipQueue = [self ipQueueForAddress:address];
+ *     
+ *     dispatch_set_target_queue(socketQueue, ipQueue);
+ *     dispatch_set_target_queue(iqQueue, moduleQueue);
+ *     
+ *     return socketQueue;
+ * }
+ * - (void)socket:(GCDAsyncSocket *)sock didAcceptNewSocket:(GCDAsyncSocket *)newSocket
+ * {
+ *     [clientConnections addObject:newSocket];
+ *     [newSocket markSocketQueueTargetQueue:moduleQueue];
+ * }
+ * 
+ * Note: This workaround is ONLY needed if you intend to execute code directly on the ipQueue or moduleQueue.
+ * This is often NOT the case, as such queues are used solely for execution shaping.
+**/
+- (void)markSocketQueueTargetQueue:(dispatch_queue_t)socketQueuesPreConfiguredTargetQueue;
+- (void)unmarkSocketQueueTargetQueue:(dispatch_queue_t)socketQueuesPreviouslyConfiguredTargetQueue;
+
+/**
+ * It's not thread-safe to access certain variables from outside the socket's internal queue.
+ * 
+ * For example, the socket file descriptor.
+ * File descriptors are simply integers which reference an index in the per-process file table.
+ * However, when one requests a new file descriptor (by opening a file or socket),
+ * the file descriptor returned is guaranteed to be the lowest numbered unused descriptor.
+ * So if we're not careful, the following could be possible:
+ * 
+ * - Thread A invokes a method which returns the socket's file descriptor.
+ * - The socket is closed via the socket's internal queue on thread B.
+ * - Thread C opens a file, and subsequently receives the file descriptor that was previously the socket's FD.
+ * - Thread A is now accessing/altering the file instead of the socket.
+ * 
+ * In addition to this, other variables are not actually objects,
+ * and thus cannot be retained/released or even autoreleased.
+ * An example is the sslContext, of type SSLContextRef, which is actually a malloc'd struct.
+ * 
+ * Although there are internal variables that make it difficult to maintain thread-safety,
+ * it is important to provide access to these variables
+ * to ensure this class can be used in a wide array of environments.
+ * This method helps to accomplish this by invoking the current block on the socket's internal queue.
+ * The methods below can be invoked from within the block to access
+ * those generally thread-unsafe internal variables in a thread-safe manner.
+ * The given block will be invoked synchronously on the socket's internal queue.
+ * 
+ * If you save references to any protected variables and use them outside the block, you do so at your own peril.
+**/
+- (void)performBlock:(dispatch_block_t)block;
+
+/**
+ * These methods are only available from within the context of a performBlock: invocation.
+ * See the documentation for the performBlock: method above.
+ * 
+ * Provides access to the socket's file descriptor(s).
+ * If the socket is a server socket (is accepting incoming connections),
+ * it might actually have multiple internal socket file descriptors - one for IPv4 and one for IPv6.
+**/
+- (int)socketFD;
+- (int)socket4FD;
+- (int)socket6FD;
+
+#if TARGET_OS_IPHONE
+
+/**
+ * These methods are only available from within the context of a performBlock: invocation.
+ * See the documentation for the performBlock: method above.
+ * 
+ * Provides access to the socket's internal CFReadStream/CFWriteStream.
+ * 
+ * These streams are only used as workarounds for specific iOS shortcomings:
+ * 
+ * - Apple has decided to keep the SecureTransport framework private is iOS.
+ *   This means the only supplied way to do SSL/TLS is via CFStream or some other API layered on top of it.
+ *   Thus, in order to provide SSL/TLS support on iOS we are forced to rely on CFStream,
+ *   instead of the preferred and faster and more powerful SecureTransport.
+ * 
+ * - If a socket doesn't have backgrounding enabled, and that socket is closed while the app is backgrounded,
+ *   Apple only bothers to notify us via the CFStream API.
+ *   The faster and more powerful GCD API isn't notified properly in this case.
+ * 
+ * See also: (BOOL)enableBackgroundingOnSocket
+**/
+- (nullable CFReadStreamRef)readStream;
+- (nullable CFWriteStreamRef)writeStream;
+
+/**
+ * This method is only available from within the context of a performBlock: invocation.
+ * See the documentation for the performBlock: method above.
+ * 
+ * Configures the socket to allow it to operate when the iOS application has been backgrounded.
+ * In other words, this method creates a read & write stream, and invokes:
+ * 
+ * CFReadStreamSetProperty(readStream, kCFStreamNetworkServiceType, kCFStreamNetworkServiceTypeVoIP);
+ * CFWriteStreamSetProperty(writeStream, kCFStreamNetworkServiceType, kCFStreamNetworkServiceTypeVoIP);
+ * 
+ * Returns YES if successful, NO otherwise.
+ * 
+ * Note: Apple does not officially support backgrounding server sockets.
+ * That is, if your socket is accepting incoming connections, Apple does not officially support
+ * allowing iOS applications to accept incoming connections while an app is backgrounded.
+ * 
+ * Example usage:
+ * 
+ * - (void)socket:(GCDAsyncSocket *)sock didConnectToHost:(NSString *)host port:(uint16_t)port
+ * {
+ *     [asyncSocket performBlock:^{
+ *         [asyncSocket enableBackgroundingOnSocket];
+ *     }];
+ * }
+**/
+- (BOOL)enableBackgroundingOnSocket;
+
+#endif
+
+/**
+ * This method is only available from within the context of a performBlock: invocation.
+ * See the documentation for the performBlock: method above.
+ * 
+ * Provides access to the socket's SSLContext, if SSL/TLS has been started on the socket.
+**/
+- (nullable SSLContextRef)sslContext;
+
+#pragma mark Utilities
+
+/**
+ * The address lookup utility used by the class.
+ * This method is synchronous, so it's recommended you use it on a background thread/queue.
+ * 
+ * The special strings "localhost" and "loopback" return the loopback address for IPv4 and IPv6.
+ * 
+ * @returns
+ *   A mutable array with all IPv4 and IPv6 addresses returned by getaddrinfo.
+ *   The addresses are specifically for TCP connections.
+ *   You can filter the addresses, if needed, using the other utility methods provided by the class.
+**/
++ (nullable NSMutableArray *)lookupHost:(NSString *)host port:(uint16_t)port error:(NSError **)errPtr;
+
+/**
+ * Extracting host and port information from raw address data.
+**/
+
++ (nullable NSString *)hostFromAddress:(NSData *)address;
++ (uint16_t)portFromAddress:(NSData *)address;
+
++ (BOOL)isIPv4Address:(NSData *)address;
++ (BOOL)isIPv6Address:(NSData *)address;
+
++ (BOOL)getHost:( NSString * __nullable * __nullable)hostPtr port:(nullable uint16_t *)portPtr fromAddress:(NSData *)address;
+
++ (BOOL)getHost:(NSString * __nullable * __nullable)hostPtr port:(nullable uint16_t *)portPtr family:(nullable sa_family_t *)afPtr fromAddress:(NSData *)address;
+
+/**
+ * A few common line separators, for use with the readDataToData:... methods.
+**/
++ (NSData *)CRLFData;   // 0x0D0A
++ (NSData *)CRData;     // 0x0D
++ (NSData *)LFData;     // 0x0A
++ (NSData *)ZeroData;   // 0x00
+
+@end
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+#pragma mark -
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+@protocol GCDAsyncSocketDelegate <NSObject>
+@optional
+
+/**
+ * This method is called immediately prior to socket:didAcceptNewSocket:.
+ * It optionally allows a listening socket to specify the socketQueue for a new accepted socket.
+ * If this method is not implemented, or returns NULL, the new accepted socket will create its own default queue.
+ * 
+ * Since you cannot autorelease a dispatch_queue,
+ * this method uses the "new" prefix in its name to specify that the returned queue has been retained.
+ * 
+ * Thus you could do something like this in the implementation:
+ * return dispatch_queue_create("MyQueue", NULL);
+ * 
+ * If you are placing multiple sockets on the same queue,
+ * then care should be taken to increment the retain count each time this method is invoked.
+ * 
+ * For example, your implementation might look something like this:
+ * dispatch_retain(myExistingQueue);
+ * return myExistingQueue;
+**/
+- (nullable dispatch_queue_t)newSocketQueueForConnectionFromAddress:(NSData *)address onSocket:(GCDAsyncSocket *)sock;
+
+/**
+ * Called when a socket accepts a connection.
+ * Another socket is automatically spawned to handle it.
+ * 
+ * You must retain the newSocket if you wish to handle the connection.
+ * Otherwise the newSocket instance will be released and the spawned connection will be closed.
+ * 
+ * By default the new socket will have the same delegate and delegateQueue.
+ * You may, of course, change this at any time.
+**/
+- (void)socket:(GCDAsyncSocket *)sock didAcceptNewSocket:(GCDAsyncSocket *)newSocket;
+
+/**
+ * Called when a socket connects and is ready for reading and writing.
+ * The host parameter will be an IP address, not a DNS name.
+**/
+- (void)socket:(GCDAsyncSocket *)sock didConnectToHost:(NSString *)host port:(uint16_t)port;
+
+/**
+ * Called when a socket connects and is ready for reading and writing.
+ * The host parameter will be an IP address, not a DNS name.
+ **/
+- (void)socket:(GCDAsyncSocket *)sock didConnectToUrl:(NSURL *)url;
+
+/**
+ * Called when a socket has completed reading the requested data into memory.
+ * Not called if there is an error.
+**/
+- (void)socket:(GCDAsyncSocket *)sock didReadData:(NSData *)data withTag:(long)tag;
+
+/**
+ * Called when a socket has read in data, but has not yet completed the read.
+ * This would occur if using readToData: or readToLength: methods.
+ * It may be used to for things such as updating progress bars.
+**/
+- (void)socket:(GCDAsyncSocket *)sock didReadPartialDataOfLength:(NSUInteger)partialLength tag:(long)tag;
+
+/**
+ * Called when a socket has completed writing the requested data. Not called if there is an error.
+**/
+- (void)socket:(GCDAsyncSocket *)sock didWriteDataWithTag:(long)tag;
+
+/**
+ * Called when a socket has written some data, but has not yet completed the entire write.
+ * It may be used to for things such as updating progress bars.
+**/
+- (void)socket:(GCDAsyncSocket *)sock didWritePartialDataOfLength:(NSUInteger)partialLength tag:(long)tag;
+
+/**
+ * Called if a read operation has reached its timeout without completing.
+ * This method allows you to optionally extend the timeout.
+ * If you return a positive time interval (> 0) the read's timeout will be extended by the given amount.
+ * If you don't implement this method, or return a non-positive time interval (<= 0) the read will timeout as usual.
+ * 
+ * The elapsed parameter is the sum of the original timeout, plus any additions previously added via this method.
+ * The length parameter is the number of bytes that have been read so far for the read operation.
+ * 
+ * Note that this method may be called multiple times for a single read if you return positive numbers.
+**/
+- (NSTimeInterval)socket:(GCDAsyncSocket *)sock shouldTimeoutReadWithTag:(long)tag
+                                                                 elapsed:(NSTimeInterval)elapsed
+                                                               bytesDone:(NSUInteger)length;
+
+/**
+ * Called if a write operation has reached its timeout without completing.
+ * This method allows you to optionally extend the timeout.
+ * If you return a positive time interval (> 0) the write's timeout will be extended by the given amount.
+ * If you don't implement this method, or return a non-positive time interval (<= 0) the write will timeout as usual.
+ * 
+ * The elapsed parameter is the sum of the original timeout, plus any additions previously added via this method.
+ * The length parameter is the number of bytes that have been written so far for the write operation.
+ * 
+ * Note that this method may be called multiple times for a single write if you return positive numbers.
+**/
+- (NSTimeInterval)socket:(GCDAsyncSocket *)sock shouldTimeoutWriteWithTag:(long)tag
+                                                                  elapsed:(NSTimeInterval)elapsed
+                                                                bytesDone:(NSUInteger)length;
+
+/**
+ * Conditionally called if the read stream closes, but the write stream may still be writeable.
+ * 
+ * This delegate method is only called if autoDisconnectOnClosedReadStream has been set to NO.
+ * See the discussion on the autoDisconnectOnClosedReadStream method for more information.
+**/
+- (void)socketDidCloseReadStream:(GCDAsyncSocket *)sock;
+
+/**
+ * Called when a socket disconnects with or without error.
+ * 
+ * If you call the disconnect method, and the socket wasn't already disconnected,
+ * then an invocation of this delegate method will be enqueued on the delegateQueue
+ * before the disconnect method returns.
+ * 
+ * Note: If the GCDAsyncSocket instance is deallocated while it is still connected,
+ * and the delegate is not also deallocated, then this method will be invoked,
+ * but the sock parameter will be nil. (It must necessarily be nil since it is no longer available.)
+ * This is a generally rare, but is possible if one writes code like this:
+ * 
+ * asyncSocket = nil; // I'm implicitly disconnecting the socket
+ * 
+ * In this case it may preferrable to nil the delegate beforehand, like this:
+ * 
+ * asyncSocket.delegate = nil; // Don't invoke my delegate method
+ * asyncSocket = nil; // I'm implicitly disconnecting the socket
+ * 
+ * Of course, this depends on how your state machine is configured.
+**/
+- (void)socketDidDisconnect:(GCDAsyncSocket *)sock withError:(nullable NSError *)err;
+
+/**
+ * Called after the socket has successfully completed SSL/TLS negotiation.
+ * This method is not called unless you use the provided startTLS method.
+ * 
+ * If a SSL/TLS negotiation fails (invalid certificate, etc) then the socket will immediately close,
+ * and the socketDidDisconnect:withError: delegate method will be called with the specific SSL error code.
+**/
+- (void)socketDidSecure:(GCDAsyncSocket *)sock;
+
+/**
+ * Allows a socket delegate to hook into the TLS handshake and manually validate the peer it's connecting to.
+ *
+ * This is only called if startTLS is invoked with options that include:
+ * - GCDAsyncSocketManuallyEvaluateTrust == YES
+ *
+ * Typically the delegate will use SecTrustEvaluate (and related functions) to properly validate the peer.
+ * 
+ * Note from Apple's documentation:
+ *   Because [SecTrustEvaluate] might look on the network for certificates in the certificate chain,
+ *   [it] might block while attempting network access. You should never call it from your main thread;
+ *   call it only from within a function running on a dispatch queue or on a separate thread.
+ * 
+ * Thus this method uses a completionHandler block rather than a normal return value.
+ * The completionHandler block is thread-safe, and may be invoked from a background queue/thread.
+ * It is safe to invoke the completionHandler block even if the socket has been closed.
+**/
+- (void)socket:(GCDAsyncSocket *)sock didReceiveTrust:(SecTrustRef)trust
+                                    completionHandler:(void (^)(BOOL shouldTrustPeer))completionHandler;
+
+@end
+NS_ASSUME_NONNULL_END
diff --git a/Pods/CocoaAsyncSocket/Source/GCD/GCDAsyncSocket.m b/Pods/CocoaAsyncSocket/Source/GCD/GCDAsyncSocket.m
new file mode 100755
index 0000000..56072f6
--- /dev/null
+++ b/Pods/CocoaAsyncSocket/Source/GCD/GCDAsyncSocket.m
@@ -0,0 +1,8438 @@
+//
+//  GCDAsyncSocket.m
+//  
+//  This class is in the public domain.
+//  Originally created by Robbie Hanson in Q4 2010.
+//  Updated and maintained by Deusty LLC and the Apple development community.
+//
+//  https://github.com/robbiehanson/CocoaAsyncSocket
+//
+
+#import "GCDAsyncSocket.h"
+
+#if TARGET_OS_IPHONE
+#import <CFNetwork/CFNetwork.h>
+#endif
+
+#import <TargetConditionals.h>
+#import <arpa/inet.h>
+#import <fcntl.h>
+#import <ifaddrs.h>
+#import <netdb.h>
+#import <netinet/in.h>
+#import <net/if.h>
+#import <sys/socket.h>
+#import <sys/types.h>
+#import <sys/ioctl.h>
+#import <sys/poll.h>
+#import <sys/uio.h>
+#import <sys/un.h>
+#import <unistd.h>
+
+#if ! __has_feature(objc_arc)
+#warning This file must be compiled with ARC. Use -fobjc-arc flag (or convert project to ARC).
+// For more information see: https://github.com/robbiehanson/CocoaAsyncSocket/wiki/ARC
+#endif
+
+
+#ifndef GCDAsyncSocketLoggingEnabled
+#define GCDAsyncSocketLoggingEnabled 0
+#endif
+
+#if GCDAsyncSocketLoggingEnabled
+
+// Logging Enabled - See log level below
+
+// Logging uses the CocoaLumberjack framework (which is also GCD based).
+// https://github.com/robbiehanson/CocoaLumberjack
+// 
+// It allows us to do a lot of logging without significantly slowing down the code.
+#import "DDLog.h"
+
+#define LogAsync   YES
+#define LogContext GCDAsyncSocketLoggingContext
+
+#define LogObjc(flg, frmt, ...) LOG_OBJC_MAYBE(LogAsync, logLevel, flg, LogContext, frmt, ##__VA_ARGS__)
+#define LogC(flg, frmt, ...)    LOG_C_MAYBE(LogAsync, logLevel, flg, LogContext, frmt, ##__VA_ARGS__)
+
+#define LogError(frmt, ...)     LogObjc(LOG_FLAG_ERROR,   (@"%@: " frmt), THIS_FILE, ##__VA_ARGS__)
+#define LogWarn(frmt, ...)      LogObjc(LOG_FLAG_WARN,    (@"%@: " frmt), THIS_FILE, ##__VA_ARGS__)
+#define LogInfo(frmt, ...)      LogObjc(LOG_FLAG_INFO,    (@"%@: " frmt), THIS_FILE, ##__VA_ARGS__)
+#define LogVerbose(frmt, ...)   LogObjc(LOG_FLAG_VERBOSE, (@"%@: " frmt), THIS_FILE, ##__VA_ARGS__)
+
+#define LogCError(frmt, ...)    LogC(LOG_FLAG_ERROR,   (@"%@: " frmt), THIS_FILE, ##__VA_ARGS__)
+#define LogCWarn(frmt, ...)     LogC(LOG_FLAG_WARN,    (@"%@: " frmt), THIS_FILE, ##__VA_ARGS__)
+#define LogCInfo(frmt, ...)     LogC(LOG_FLAG_INFO,    (@"%@: " frmt), THIS_FILE, ##__VA_ARGS__)
+#define LogCVerbose(frmt, ...)  LogC(LOG_FLAG_VERBOSE, (@"%@: " frmt), THIS_FILE, ##__VA_ARGS__)
+
+#define LogTrace()              LogObjc(LOG_FLAG_VERBOSE, @"%@: %@", THIS_FILE, THIS_METHOD)
+#define LogCTrace()             LogC(LOG_FLAG_VERBOSE, @"%@: %s", THIS_FILE, __FUNCTION__)
+
+#ifndef GCDAsyncSocketLogLevel
+#define GCDAsyncSocketLogLevel LOG_LEVEL_VERBOSE
+#endif
+
+// Log levels : off, error, warn, info, verbose
+static const int logLevel = GCDAsyncSocketLogLevel;
+
+#else
+
+// Logging Disabled
+
+#define LogError(frmt, ...)     {}
+#define LogWarn(frmt, ...)      {}
+#define LogInfo(frmt, ...)      {}
+#define LogVerbose(frmt, ...)   {}
+
+#define LogCError(frmt, ...)    {}
+#define LogCWarn(frmt, ...)     {}
+#define LogCInfo(frmt, ...)     {}
+#define LogCVerbose(frmt, ...)  {}
+
+#define LogTrace()              {}
+#define LogCTrace(frmt, ...)    {}
+
+#endif
+
+/**
+ * Seeing a return statements within an inner block
+ * can sometimes be mistaken for a return point of the enclosing method.
+ * This makes inline blocks a bit easier to read.
+**/
+#define return_from_block  return
+
+/**
+ * A socket file descriptor is really just an integer.
+ * It represents the index of the socket within the kernel.
+ * This makes invalid file descriptor comparisons easier to read.
+**/
+#define SOCKET_NULL -1
+
+
+NSString *const GCDAsyncSocketException = @"GCDAsyncSocketException";
+NSString *const GCDAsyncSocketErrorDomain = @"GCDAsyncSocketErrorDomain";
+
+NSString *const GCDAsyncSocketQueueName = @"GCDAsyncSocket";
+NSString *const GCDAsyncSocketThreadName = @"GCDAsyncSocket-CFStream";
+
+NSString *const GCDAsyncSocketManuallyEvaluateTrust = @"GCDAsyncSocketManuallyEvaluateTrust";
+#if TARGET_OS_IPHONE
+NSString *const GCDAsyncSocketUseCFStreamForTLS = @"GCDAsyncSocketUseCFStreamForTLS";
+#endif
+NSString *const GCDAsyncSocketSSLPeerID = @"GCDAsyncSocketSSLPeerID";
+NSString *const GCDAsyncSocketSSLProtocolVersionMin = @"GCDAsyncSocketSSLProtocolVersionMin";
+NSString *const GCDAsyncSocketSSLProtocolVersionMax = @"GCDAsyncSocketSSLProtocolVersionMax";
+NSString *const GCDAsyncSocketSSLSessionOptionFalseStart = @"GCDAsyncSocketSSLSessionOptionFalseStart";
+NSString *const GCDAsyncSocketSSLSessionOptionSendOneByteRecord = @"GCDAsyncSocketSSLSessionOptionSendOneByteRecord";
+NSString *const GCDAsyncSocketSSLCipherSuites = @"GCDAsyncSocketSSLCipherSuites";
+#if !TARGET_OS_IPHONE
+NSString *const GCDAsyncSocketSSLDiffieHellmanParameters = @"GCDAsyncSocketSSLDiffieHellmanParameters";
+#endif
+
+enum GCDAsyncSocketFlags
+{
+	kSocketStarted                 = 1 <<  0,  // If set, socket has been started (accepting/connecting)
+	kConnected                     = 1 <<  1,  // If set, the socket is connected
+	kForbidReadsWrites             = 1 <<  2,  // If set, no new reads or writes are allowed
+	kReadsPaused                   = 1 <<  3,  // If set, reads are paused due to possible timeout
+	kWritesPaused                  = 1 <<  4,  // If set, writes are paused due to possible timeout
+	kDisconnectAfterReads          = 1 <<  5,  // If set, disconnect after no more reads are queued
+	kDisconnectAfterWrites         = 1 <<  6,  // If set, disconnect after no more writes are queued
+	kSocketCanAcceptBytes          = 1 <<  7,  // If set, we know socket can accept bytes. If unset, it's unknown.
+	kReadSourceSuspended           = 1 <<  8,  // If set, the read source is suspended
+	kWriteSourceSuspended          = 1 <<  9,  // If set, the write source is suspended
+	kQueuedTLS                     = 1 << 10,  // If set, we've queued an upgrade to TLS
+	kStartingReadTLS               = 1 << 11,  // If set, we're waiting for TLS negotiation to complete
+	kStartingWriteTLS              = 1 << 12,  // If set, we're waiting for TLS negotiation to complete
+	kSocketSecure                  = 1 << 13,  // If set, socket is using secure communication via SSL/TLS
+	kSocketHasReadEOF              = 1 << 14,  // If set, we have read EOF from socket
+	kReadStreamClosed              = 1 << 15,  // If set, we've read EOF plus prebuffer has been drained
+	kDealloc                       = 1 << 16,  // If set, the socket is being deallocated
+#if TARGET_OS_IPHONE
+	kAddedStreamsToRunLoop         = 1 << 17,  // If set, CFStreams have been added to listener thread
+	kUsingCFStreamForTLS           = 1 << 18,  // If set, we're forced to use CFStream instead of SecureTransport
+	kSecureSocketHasBytesAvailable = 1 << 19,  // If set, CFReadStream has notified us of bytes available
+#endif
+};
+
+enum GCDAsyncSocketConfig
+{
+	kIPv4Disabled              = 1 << 0,  // If set, IPv4 is disabled
+	kIPv6Disabled              = 1 << 1,  // If set, IPv6 is disabled
+	kPreferIPv6                = 1 << 2,  // If set, IPv6 is preferred over IPv4
+	kAllowHalfDuplexConnection = 1 << 3,  // If set, the socket will stay open even if the read stream closes
+};
+
+#if TARGET_OS_IPHONE
+  static NSThread *cfstreamThread;  // Used for CFStreams
+
+
+  static uint64_t cfstreamThreadRetainCount;   // setup & teardown
+  static dispatch_queue_t cfstreamThreadSetupQueue; // setup & teardown
+#endif
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+#pragma mark -
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+/**
+ * A PreBuffer is used when there is more data available on the socket
+ * than is being requested by current read request.
+ * In this case we slurp up all data from the socket (to minimize sys calls),
+ * and store additional yet unread data in a "prebuffer".
+ * 
+ * The prebuffer is entirely drained before we read from the socket again.
+ * In other words, a large chunk of data is written is written to the prebuffer.
+ * The prebuffer is then drained via a series of one or more reads (for subsequent read request(s)).
+ * 
+ * A ring buffer was once used for this purpose.
+ * But a ring buffer takes up twice as much memory as needed (double the size for mirroring).
+ * In fact, it generally takes up more than twice the needed size as everything has to be rounded up to vm_page_size.
+ * And since the prebuffer is always completely drained after being written to, a full ring buffer isn't needed.
+ * 
+ * The current design is very simple and straight-forward, while also keeping memory requirements lower.
+**/
+
+@interface GCDAsyncSocketPreBuffer : NSObject
+{
+	uint8_t *preBuffer;
+	size_t preBufferSize;
+	
+	uint8_t *readPointer;
+	uint8_t *writePointer;
+}
+
+- (id)initWithCapacity:(size_t)numBytes;
+
+- (void)ensureCapacityForWrite:(size_t)numBytes;
+
+- (size_t)availableBytes;
+- (uint8_t *)readBuffer;
+
+- (void)getReadBuffer:(uint8_t **)bufferPtr availableBytes:(size_t *)availableBytesPtr;
+
+- (size_t)availableSpace;
+- (uint8_t *)writeBuffer;
+
+- (void)getWriteBuffer:(uint8_t **)bufferPtr availableSpace:(size_t *)availableSpacePtr;
+
+- (void)didRead:(size_t)bytesRead;
+- (void)didWrite:(size_t)bytesWritten;
+
+- (void)reset;
+
+@end
+
+@implementation GCDAsyncSocketPreBuffer
+
+- (id)initWithCapacity:(size_t)numBytes
+{
+	if ((self = [super init]))
+	{
+		preBufferSize = numBytes;
+		preBuffer = malloc(preBufferSize);
+		
+		readPointer = preBuffer;
+		writePointer = preBuffer;
+	}
+	return self;
+}
+
+- (void)dealloc
+{
+	if (preBuffer)
+		free(preBuffer);
+}
+
+- (void)ensureCapacityForWrite:(size_t)numBytes
+{
+	size_t availableSpace = [self availableSpace];
+	
+	if (numBytes > availableSpace)
+	{
+		size_t additionalBytes = numBytes - availableSpace;
+		
+		size_t newPreBufferSize = preBufferSize + additionalBytes;
+		uint8_t *newPreBuffer = realloc(preBuffer, newPreBufferSize);
+		
+		size_t readPointerOffset = readPointer - preBuffer;
+		size_t writePointerOffset = writePointer - preBuffer;
+		
+		preBuffer = newPreBuffer;
+		preBufferSize = newPreBufferSize;
+		
+		readPointer = preBuffer + readPointerOffset;
+		writePointer = preBuffer + writePointerOffset;
+	}
+}
+
+- (size_t)availableBytes
+{
+	return writePointer - readPointer;
+}
+
+- (uint8_t *)readBuffer
+{
+	return readPointer;
+}
+
+- (void)getReadBuffer:(uint8_t **)bufferPtr availableBytes:(size_t *)availableBytesPtr
+{
+	if (bufferPtr) *bufferPtr = readPointer;
+	if (availableBytesPtr) *availableBytesPtr = [self availableBytes];
+}
+
+- (void)didRead:(size_t)bytesRead
+{
+	readPointer += bytesRead;
+	
+	if (readPointer == writePointer)
+	{
+		// The prebuffer has been drained. Reset pointers.
+		readPointer  = preBuffer;
+		writePointer = preBuffer;
+	}
+}
+
+- (size_t)availableSpace
+{
+	return preBufferSize - (writePointer - preBuffer);
+}
+
+- (uint8_t *)writeBuffer
+{
+	return writePointer;
+}
+
+- (void)getWriteBuffer:(uint8_t **)bufferPtr availableSpace:(size_t *)availableSpacePtr
+{
+	if (bufferPtr) *bufferPtr = writePointer;
+	if (availableSpacePtr) *availableSpacePtr = [self availableSpace];
+}
+
+- (void)didWrite:(size_t)bytesWritten
+{
+	writePointer += bytesWritten;
+}
+
+- (void)reset
+{
+	readPointer  = preBuffer;
+	writePointer = preBuffer;
+}
+
+@end
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+#pragma mark -
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+/**
+ * The GCDAsyncReadPacket encompasses the instructions for any given read.
+ * The content of a read packet allows the code to determine if we're:
+ *  - reading to a certain length
+ *  - reading to a certain separator
+ *  - or simply reading the first chunk of available data
+**/
+@interface GCDAsyncReadPacket : NSObject
+{
+  @public
+	NSMutableData *buffer;
+	NSUInteger startOffset;
+	NSUInteger bytesDone;
+	NSUInteger maxLength;
+	NSTimeInterval timeout;
+	NSUInteger readLength;
+	NSData *term;
+	BOOL bufferOwner;
+	NSUInteger originalBufferLength;
+	long tag;
+}
+- (id)initWithData:(NSMutableData *)d
+       startOffset:(NSUInteger)s
+         maxLength:(NSUInteger)m
+           timeout:(NSTimeInterval)t
+        readLength:(NSUInteger)l
+        terminator:(NSData *)e
+               tag:(long)i;
+
+- (void)ensureCapacityForAdditionalDataOfLength:(NSUInteger)bytesToRead;
+
+- (NSUInteger)optimalReadLengthWithDefault:(NSUInteger)defaultValue shouldPreBuffer:(BOOL *)shouldPreBufferPtr;
+
+- (NSUInteger)readLengthForNonTermWithHint:(NSUInteger)bytesAvailable;
+- (NSUInteger)readLengthForTermWithHint:(NSUInteger)bytesAvailable shouldPreBuffer:(BOOL *)shouldPreBufferPtr;
+- (NSUInteger)readLengthForTermWithPreBuffer:(GCDAsyncSocketPreBuffer *)preBuffer found:(BOOL *)foundPtr;
+
+- (NSInteger)searchForTermAfterPreBuffering:(ssize_t)numBytes;
+
+@end
+
+@implementation GCDAsyncReadPacket
+
+- (id)initWithData:(NSMutableData *)d
+       startOffset:(NSUInteger)s
+         maxLength:(NSUInteger)m
+           timeout:(NSTimeInterval)t
+        readLength:(NSUInteger)l
+        terminator:(NSData *)e
+               tag:(long)i
+{
+	if((self = [super init]))
+	{
+		bytesDone = 0;
+		maxLength = m;
+		timeout = t;
+		readLength = l;
+		term = [e copy];
+		tag = i;
+		
+		if (d)
+		{
+			buffer = d;
+			startOffset = s;
+			bufferOwner = NO;
+			originalBufferLength = [d length];
+		}
+		else
+		{
+			if (readLength > 0)
+				buffer = [[NSMutableData alloc] initWithLength:readLength];
+			else
+				buffer = [[NSMutableData alloc] initWithLength:0];
+			
+			startOffset = 0;
+			bufferOwner = YES;
+			originalBufferLength = 0;
+		}
+	}
+	return self;
+}
+
+/**
+ * Increases the length of the buffer (if needed) to ensure a read of the given size will fit.
+**/
+- (void)ensureCapacityForAdditionalDataOfLength:(NSUInteger)bytesToRead
+{
+	NSUInteger buffSize = [buffer length];
+	NSUInteger buffUsed = startOffset + bytesDone;
+	
+	NSUInteger buffSpace = buffSize - buffUsed;
+	
+	if (bytesToRead > buffSpace)
+	{
+		NSUInteger buffInc = bytesToRead - buffSpace;
+		
+		[buffer increaseLengthBy:buffInc];
+	}
+}
+
+/**
+ * This method is used when we do NOT know how much data is available to be read from the socket.
+ * This method returns the default value unless it exceeds the specified readLength or maxLength.
+ * 
+ * Furthermore, the shouldPreBuffer decision is based upon the packet type,
+ * and whether the returned value would fit in the current buffer without requiring a resize of the buffer.
+**/
+- (NSUInteger)optimalReadLengthWithDefault:(NSUInteger)defaultValue shouldPreBuffer:(BOOL *)shouldPreBufferPtr
+{
+	NSUInteger result;
+	
+	if (readLength > 0)
+	{
+		// Read a specific length of data
+		result = readLength - bytesDone;
+		
+		// There is no need to prebuffer since we know exactly how much data we need to read.
+		// Even if the buffer isn't currently big enough to fit this amount of data,
+		// it would have to be resized eventually anyway.
+		
+		if (shouldPreBufferPtr)
+			*shouldPreBufferPtr = NO;
+	}
+	else
+	{
+		// Either reading until we find a specified terminator,
+		// or we're simply reading all available data.
+		// 
+		// In other words, one of:
+		// 
+		// - readDataToData packet
+		// - readDataWithTimeout packet
+		
+		if (maxLength > 0)
+			result =  MIN(defaultValue, (maxLength - bytesDone));
+		else
+			result = defaultValue;
+		
+		// Since we don't know the size of the read in advance,
+		// the shouldPreBuffer decision is based upon whether the returned value would fit
+		// in the current buffer without requiring a resize of the buffer.
+		// 
+		// This is because, in all likelyhood, the amount read from the socket will be less than the default value.
+		// Thus we should avoid over-allocating the read buffer when we can simply use the pre-buffer instead.
+		
+		if (shouldPreBufferPtr)
+		{
+			NSUInteger buffSize = [buffer length];
+			NSUInteger buffUsed = startOffset + bytesDone;
+			
+			NSUInteger buffSpace = buffSize - buffUsed;
+			
+			if (buffSpace >= result)
+				*shouldPreBufferPtr = NO;
+			else
+				*shouldPreBufferPtr = YES;
+		}
+	}
+	
+	return result;
+}
+
+/**
+ * For read packets without a set terminator, returns the amount of data
+ * that can be read without exceeding the readLength or maxLength.
+ * 
+ * The given parameter indicates the number of bytes estimated to be available on the socket,
+ * which is taken into consideration during the calculation.
+ * 
+ * The given hint MUST be greater than zero.
+**/
+- (NSUInteger)readLengthForNonTermWithHint:(NSUInteger)bytesAvailable
+{
+	NSAssert(term == nil, @"This method does not apply to term reads");
+	NSAssert(bytesAvailable > 0, @"Invalid parameter: bytesAvailable");
+	
+	if (readLength > 0)
+	{
+		// Read a specific length of data
+		
+		return MIN(bytesAvailable, (readLength - bytesDone));
+		
+		// No need to avoid resizing the buffer.
+		// If the user provided their own buffer,
+		// and told us to read a certain length of data that exceeds the size of the buffer,
+		// then it is clear that our code will resize the buffer during the read operation.
+		// 
+		// This method does not actually do any resizing.
+		// The resizing will happen elsewhere if needed.
+	}
+	else
+	{
+		// Read all available data
+		
+		NSUInteger result = bytesAvailable;
+		
+		if (maxLength > 0)
+		{
+			result = MIN(result, (maxLength - bytesDone));
+		}
+		
+		// No need to avoid resizing the buffer.
+		// If the user provided their own buffer,
+		// and told us to read all available data without giving us a maxLength,
+		// then it is clear that our code might resize the buffer during the read operation.
+		// 
+		// This method does not actually do any resizing.
+		// The resizing will happen elsewhere if needed.
+		
+		return result;
+	}
+}
+
+/**
+ * For read packets with a set terminator, returns the amount of data
+ * that can be read without exceeding the maxLength.
+ * 
+ * The given parameter indicates the number of bytes estimated to be available on the socket,
+ * which is taken into consideration during the calculation.
+ * 
+ * To optimize memory allocations, mem copies, and mem moves
+ * the shouldPreBuffer boolean value will indicate if the data should be read into a prebuffer first,
+ * or if the data can be read directly into the read packet's buffer.
+**/
+- (NSUInteger)readLengthForTermWithHint:(NSUInteger)bytesAvailable shouldPreBuffer:(BOOL *)shouldPreBufferPtr
+{
+	NSAssert(term != nil, @"This method does not apply to non-term reads");
+	NSAssert(bytesAvailable > 0, @"Invalid parameter: bytesAvailable");
+	
+	
+	NSUInteger result = bytesAvailable;
+	
+	if (maxLength > 0)
+	{
+		result = MIN(result, (maxLength - bytesDone));
+	}
+	
+	// Should the data be read into the read packet's buffer, or into a pre-buffer first?
+	// 
+	// One would imagine the preferred option is the faster one.
+	// So which one is faster?
+	// 
+	// Reading directly into the packet's buffer requires:
+	// 1. Possibly resizing packet buffer (malloc/realloc)
+	// 2. Filling buffer (read)
+	// 3. Searching for term (memcmp)
+	// 4. Possibly copying overflow into prebuffer (malloc/realloc, memcpy)
+	// 
+	// Reading into prebuffer first:
+	// 1. Possibly resizing prebuffer (malloc/realloc)
+	// 2. Filling buffer (read)
+	// 3. Searching for term (memcmp)
+	// 4. Copying underflow into packet buffer (malloc/realloc, memcpy)
+	// 5. Removing underflow from prebuffer (memmove)
+	// 
+	// Comparing the performance of the two we can see that reading
+	// data into the prebuffer first is slower due to the extra memove.
+	// 
+	// However:
+	// The implementation of NSMutableData is open source via core foundation's CFMutableData.
+	// Decreasing the length of a mutable data object doesn't cause a realloc.
+	// In other words, the capacity of a mutable data object can grow, but doesn't shrink.
+	// 
+	// This means the prebuffer will rarely need a realloc.
+	// The packet buffer, on the other hand, may often need a realloc.
+	// This is especially true if we are the buffer owner.
+	// Furthermore, if we are constantly realloc'ing the packet buffer,
+	// and then moving the overflow into the prebuffer,
+	// then we're consistently over-allocating memory for each term read.
+	// And now we get into a bit of a tradeoff between speed and memory utilization.
+	// 
+	// The end result is that the two perform very similarly.
+	// And we can answer the original question very simply by another means.
+	// 
+	// If we can read all the data directly into the packet's buffer without resizing it first,
+	// then we do so. Otherwise we use the prebuffer.
+	
+	if (shouldPreBufferPtr)
+	{
+		NSUInteger buffSize = [buffer length];
+		NSUInteger buffUsed = startOffset + bytesDone;
+		
+		if ((buffSize - buffUsed) >= result)
+			*shouldPreBufferPtr = NO;
+		else
+			*shouldPreBufferPtr = YES;
+	}
+	
+	return result;
+}
+
+/**
+ * For read packets with a set terminator,
+ * returns the amount of data that can be read from the given preBuffer,
+ * without going over a terminator or the maxLength.
+ * 
+ * It is assumed the terminator has not already been read.
+**/
+- (NSUInteger)readLengthForTermWithPreBuffer:(GCDAsyncSocketPreBuffer *)preBuffer found:(BOOL *)foundPtr
+{
+	NSAssert(term != nil, @"This method does not apply to non-term reads");
+	NSAssert([preBuffer availableBytes] > 0, @"Invoked with empty pre buffer!");
+	
+	// We know that the terminator, as a whole, doesn't exist in our own buffer.
+	// But it is possible that a _portion_ of it exists in our buffer.
+	// So we're going to look for the terminator starting with a portion of our own buffer.
+	// 
+	// Example:
+	// 
+	// term length      = 3 bytes
+	// bytesDone        = 5 bytes
+	// preBuffer length = 5 bytes
+	// 
+	// If we append the preBuffer to our buffer,
+	// it would look like this:
+	// 
+	// ---------------------
+	// |B|B|B|B|B|P|P|P|P|P|
+	// ---------------------
+	// 
+	// So we start our search here:
+	// 
+	// ---------------------
+	// |B|B|B|B|B|P|P|P|P|P|
+	// -------^-^-^---------
+	// 
+	// And move forwards...
+	// 
+	// ---------------------
+	// |B|B|B|B|B|P|P|P|P|P|
+	// ---------^-^-^-------
+	// 
+	// Until we find the terminator or reach the end.
+	// 
+	// ---------------------
+	// |B|B|B|B|B|P|P|P|P|P|
+	// ---------------^-^-^-
+	
+	BOOL found = NO;
+	
+	NSUInteger termLength = [term length];
+	NSUInteger preBufferLength = [preBuffer availableBytes];
+	
+	if ((bytesDone + preBufferLength) < termLength)
+	{
+		// Not enough data for a full term sequence yet
+		return preBufferLength;
+	}
+	
+	NSUInteger maxPreBufferLength;
+	if (maxLength > 0) {
+		maxPreBufferLength = MIN(preBufferLength, (maxLength - bytesDone));
+		
+		// Note: maxLength >= termLength
+	}
+	else {
+		maxPreBufferLength = preBufferLength;
+	}
+	
+	uint8_t seq[termLength];
+	const void *termBuf = [term bytes];
+	
+	NSUInteger bufLen = MIN(bytesDone, (termLength - 1));
+	uint8_t *buf = (uint8_t *)[buffer mutableBytes] + startOffset + bytesDone - bufLen;
+	
+	NSUInteger preLen = termLength - bufLen;
+	const uint8_t *pre = [preBuffer readBuffer];
+	
+	NSUInteger loopCount = bufLen + maxPreBufferLength - termLength + 1; // Plus one. See example above.
+	
+	NSUInteger result = maxPreBufferLength;
+	
+	NSUInteger i;
+	for (i = 0; i < loopCount; i++)
+	{
+		if (bufLen > 0)
+		{
+			// Combining bytes from buffer and preBuffer
+			
+			memcpy(seq, buf, bufLen);
+			memcpy(seq + bufLen, pre, preLen);
+			
+			if (memcmp(seq, termBuf, termLength) == 0)
+			{
+				result = preLen;
+				found = YES;
+				break;
+			}
+			
+			buf++;
+			bufLen--;
+			preLen++;
+		}
+		else
+		{
+			// Comparing directly from preBuffer
+			
+			if (memcmp(pre, termBuf, termLength) == 0)
+			{
+				NSUInteger preOffset = pre - [preBuffer readBuffer]; // pointer arithmetic
+				
+				result = preOffset + termLength;
+				found = YES;
+				break;
+			}
+			
+			pre++;
+		}
+	}
+	
+	// There is no need to avoid resizing the buffer in this particular situation.
+	
+	if (foundPtr) *foundPtr = found;
+	return result;
+}
+
+/**
+ * For read packets with a set terminator, scans the packet buffer for the term.
+ * It is assumed the terminator had not been fully read prior to the new bytes.
+ * 
+ * If the term is found, the number of excess bytes after the term are returned.
+ * If the term is not found, this method will return -1.
+ * 
+ * Note: A return value of zero means the term was found at the very end.
+ * 
+ * Prerequisites:
+ * The given number of bytes have been added to the end of our buffer.
+ * Our bytesDone variable has NOT been changed due to the prebuffered bytes.
+**/
+- (NSInteger)searchForTermAfterPreBuffering:(ssize_t)numBytes
+{
+	NSAssert(term != nil, @"This method does not apply to non-term reads");
+	
+	// The implementation of this method is very similar to the above method.
+	// See the above method for a discussion of the algorithm used here.
+	
+	uint8_t *buff = [buffer mutableBytes];
+	NSUInteger buffLength = bytesDone + numBytes;
+	
+	const void *termBuff = [term bytes];
+	NSUInteger termLength = [term length];
+	
+	// Note: We are dealing with unsigned integers,
+	// so make sure the math doesn't go below zero.
+	
+	NSUInteger i = ((buffLength - numBytes) >= termLength) ? (buffLength - numBytes - termLength + 1) : 0;
+	
+	while (i + termLength <= buffLength)
+	{
+		uint8_t *subBuffer = buff + startOffset + i;
+		
+		if (memcmp(subBuffer, termBuff, termLength) == 0)
+		{
+			return buffLength - (i + termLength);
+		}
+		
+		i++;
+	}
+	
+	return -1;
+}
+
+
+@end
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+#pragma mark -
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+/**
+ * The GCDAsyncWritePacket encompasses the instructions for any given write.
+**/
+@interface GCDAsyncWritePacket : NSObject
+{
+  @public
+	NSData *buffer;
+	NSUInteger bytesDone;
+	long tag;
+	NSTimeInterval timeout;
+}
+- (id)initWithData:(NSData *)d timeout:(NSTimeInterval)t tag:(long)i;
+@end
+
+@implementation GCDAsyncWritePacket
+
+- (id)initWithData:(NSData *)d timeout:(NSTimeInterval)t tag:(long)i
+{
+	if((self = [super init]))
+	{
+		buffer = d; // Retain not copy. For performance as documented in header file.
+		bytesDone = 0;
+		timeout = t;
+		tag = i;
+	}
+	return self;
+}
+
+
+@end
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+#pragma mark -
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+/**
+ * The GCDAsyncSpecialPacket encompasses special instructions for interruptions in the read/write queues.
+ * This class my be altered to support more than just TLS in the future.
+**/
+@interface GCDAsyncSpecialPacket : NSObject
+{
+  @public
+	NSDictionary *tlsSettings;
+}
+- (id)initWithTLSSettings:(NSDictionary *)settings;
+@end
+
+@implementation GCDAsyncSpecialPacket
+
+- (id)initWithTLSSettings:(NSDictionary *)settings
+{
+	if((self = [super init]))
+	{
+		tlsSettings = [settings copy];
+	}
+	return self;
+}
+
+
+@end
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+#pragma mark -
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+@implementation GCDAsyncSocket
+{
+	uint32_t flags;
+	uint16_t config;
+	
+	__weak id<GCDAsyncSocketDelegate> delegate;
+	dispatch_queue_t delegateQueue;
+	
+	int socket4FD;
+	int socket6FD;
+	int socketUN;
+	NSURL *socketUrl;
+	int stateIndex;
+	NSData * connectInterface4;
+	NSData * connectInterface6;
+	NSData * connectInterfaceUN;
+	
+	dispatch_queue_t socketQueue;
+	
+	dispatch_source_t accept4Source;
+	dispatch_source_t accept6Source;
+	dispatch_source_t acceptUNSource;
+	dispatch_source_t connectTimer;
+	dispatch_source_t readSource;
+	dispatch_source_t writeSource;
+	dispatch_source_t readTimer;
+	dispatch_source_t writeTimer;
+	
+	NSMutableArray *readQueue;
+	NSMutableArray *writeQueue;
+	
+	GCDAsyncReadPacket *currentRead;
+	GCDAsyncWritePacket *currentWrite;
+	
+	unsigned long socketFDBytesAvailable;
+	
+	GCDAsyncSocketPreBuffer *preBuffer;
+		
+#if TARGET_OS_IPHONE
+	CFStreamClientContext streamContext;
+	CFReadStreamRef readStream;
+	CFWriteStreamRef writeStream;
+#endif
+	SSLContextRef sslContext;
+	GCDAsyncSocketPreBuffer *sslPreBuffer;
+	size_t sslWriteCachedLength;
+	OSStatus sslErrCode;
+    OSStatus lastSSLHandshakeError;
+	
+	void *IsOnSocketQueueOrTargetQueueKey;
+	
+	id userData;
+    NSTimeInterval alternateAddressDelay;
+}
+
+- (id)init
+{
+	return [self initWithDelegate:nil delegateQueue:NULL socketQueue:NULL];
+}
+
+- (id)initWithSocketQueue:(dispatch_queue_t)sq
+{
+	return [self initWithDelegate:nil delegateQueue:NULL socketQueue:sq];
+}
+
+- (id)initWithDelegate:(id)aDelegate delegateQueue:(dispatch_queue_t)dq
+{
+	return [self initWithDelegate:aDelegate delegateQueue:dq socketQueue:NULL];
+}
+
+- (id)initWithDelegate:(id<GCDAsyncSocketDelegate>)aDelegate delegateQueue:(dispatch_queue_t)dq socketQueue:(dispatch_queue_t)sq
+{
+	if((self = [super init]))
+	{
+		delegate = aDelegate;
+		delegateQueue = dq;
+		
+		#if !OS_OBJECT_USE_OBJC
+		if (dq) dispatch_retain(dq);
+		#endif
+		
+		socket4FD = SOCKET_NULL;
+		socket6FD = SOCKET_NULL;
+		socketUN = SOCKET_NULL;
+		socketUrl = nil;
+		stateIndex = 0;
+		
+		if (sq)
+		{
+			NSAssert(sq != dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_LOW, 0),
+			         @"The given socketQueue parameter must not be a concurrent queue.");
+			NSAssert(sq != dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0),
+			         @"The given socketQueue parameter must not be a concurrent queue.");
+			NSAssert(sq != dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0),
+			         @"The given socketQueue parameter must not be a concurrent queue.");
+			
+			socketQueue = sq;
+			#if !OS_OBJECT_USE_OBJC
+			dispatch_retain(sq);
+			#endif
+		}
+		else
+		{
+			socketQueue = dispatch_queue_create([GCDAsyncSocketQueueName UTF8String], NULL);
+		}
+		
+		// The dispatch_queue_set_specific() and dispatch_get_specific() functions take a "void *key" parameter.
+		// From the documentation:
+		//
+		// > Keys are only compared as pointers and are never dereferenced.
+		// > Thus, you can use a pointer to a static variable for a specific subsystem or
+		// > any other value that allows you to identify the value uniquely.
+		//
+		// We're just going to use the memory address of an ivar.
+		// Specifically an ivar that is explicitly named for our purpose to make the code more readable.
+		//
+		// However, it feels tedious (and less readable) to include the "&" all the time:
+		// dispatch_get_specific(&IsOnSocketQueueOrTargetQueueKey)
+		//
+		// So we're going to make it so it doesn't matter if we use the '&' or not,
+		// by assigning the value of the ivar to the address of the ivar.
+		// Thus: IsOnSocketQueueOrTargetQueueKey == &IsOnSocketQueueOrTargetQueueKey;
+		
+		IsOnSocketQueueOrTargetQueueKey = &IsOnSocketQueueOrTargetQueueKey;
+		
+		void *nonNullUnusedPointer = (__bridge void *)self;
+		dispatch_queue_set_specific(socketQueue, IsOnSocketQueueOrTargetQueueKey, nonNullUnusedPointer, NULL);
+		
+		readQueue = [[NSMutableArray alloc] initWithCapacity:5];
+		currentRead = nil;
+		
+		writeQueue = [[NSMutableArray alloc] initWithCapacity:5];
+		currentWrite = nil;
+		
+		preBuffer = [[GCDAsyncSocketPreBuffer alloc] initWithCapacity:(1024 * 4)];
+        alternateAddressDelay = 0.3;
+	}
+	return self;
+}
+
+- (void)dealloc
+{
+	LogInfo(@"%@ - %@ (start)", THIS_METHOD, self);
+	
+	// Set dealloc flag.
+	// This is used by closeWithError to ensure we don't accidentally retain ourself.
+	flags |= kDealloc;
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+	{
+		[self closeWithError:nil];
+	}
+	else
+	{
+		dispatch_sync(socketQueue, ^{
+			[self closeWithError:nil];
+		});
+	}
+	
+	delegate = nil;
+	
+	#if !OS_OBJECT_USE_OBJC
+	if (delegateQueue) dispatch_release(delegateQueue);
+	#endif
+	delegateQueue = NULL;
+	
+	#if !OS_OBJECT_USE_OBJC
+	if (socketQueue) dispatch_release(socketQueue);
+	#endif
+	socketQueue = NULL;
+	
+	LogInfo(@"%@ - %@ (finish)", THIS_METHOD, self);
+}
+
+#pragma mark -
+
++ (nullable instancetype)socketFromConnectedSocketFD:(int)socketFD socketQueue:(nullable dispatch_queue_t)sq error:(NSError**)error {
+  return [self socketFromConnectedSocketFD:socketFD delegate:nil delegateQueue:NULL socketQueue:sq error:error];
+}
+
++ (nullable instancetype)socketFromConnectedSocketFD:(int)socketFD delegate:(nullable id<GCDAsyncSocketDelegate>)aDelegate delegateQueue:(nullable dispatch_queue_t)dq error:(NSError**)error {
+  return [self socketFromConnectedSocketFD:socketFD delegate:aDelegate delegateQueue:dq socketQueue:NULL error:error];
+}
+
++ (nullable instancetype)socketFromConnectedSocketFD:(int)socketFD delegate:(nullable id<GCDAsyncSocketDelegate>)aDelegate delegateQueue:(nullable dispatch_queue_t)dq socketQueue:(nullable dispatch_queue_t)sq error:(NSError* __autoreleasing *)error
+{
+  __block BOOL errorOccured = NO;
+  
+  GCDAsyncSocket *socket = [[[self class] alloc] initWithDelegate:aDelegate delegateQueue:dq socketQueue:sq];
+  
+  dispatch_sync(socket->socketQueue, ^{ @autoreleasepool {
+    struct sockaddr addr;
+    socklen_t addr_size = sizeof(struct sockaddr);
+    int retVal = getpeername(socketFD, (struct sockaddr *)&addr, &addr_size);
+    if (retVal)
+    {
+      NSString *errMsg = NSLocalizedStringWithDefaultValue(@"GCDAsyncSocketOtherError",
+                                                           @"GCDAsyncSocket", [NSBundle mainBundle],
+                                                           @"Attempt to create socket from socket FD failed. getpeername() failed", nil);
+      
+      NSDictionary *userInfo = [NSDictionary dictionaryWithObject:errMsg forKey:NSLocalizedDescriptionKey];
+
+      errorOccured = YES;
+      if (error)
+        *error = [NSError errorWithDomain:GCDAsyncSocketErrorDomain code:GCDAsyncSocketOtherError userInfo:userInfo];
+      return;
+    }
+    
+    if (addr.sa_family == AF_INET)
+    {
+      socket->socket4FD = socketFD;
+    }
+    else if (addr.sa_family == AF_INET6)
+    {
+      socket->socket6FD = socketFD;
+    }
+    else
+    {
+      NSString *errMsg = NSLocalizedStringWithDefaultValue(@"GCDAsyncSocketOtherError",
+                                                           @"GCDAsyncSocket", [NSBundle mainBundle],
+                                                           @"Attempt to create socket from socket FD failed. socket FD is neither IPv4 nor IPv6", nil);
+      
+      NSDictionary *userInfo = [NSDictionary dictionaryWithObject:errMsg forKey:NSLocalizedDescriptionKey];
+      
+      errorOccured = YES;
+      if (error)
+        *error = [NSError errorWithDomain:GCDAsyncSocketErrorDomain code:GCDAsyncSocketOtherError userInfo:userInfo];
+      return;
+    }
+    
+    socket->flags = kSocketStarted;
+    [socket didConnect:socket->stateIndex];
+  }});
+  
+  return errorOccured? nil: socket;
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+#pragma mark Configuration
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+- (id)delegate
+{
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+	{
+		return delegate;
+	}
+	else
+	{
+		__block id result;
+		
+		dispatch_sync(socketQueue, ^{
+            result = self->delegate;
+		});
+		
+		return result;
+	}
+}
+
+- (void)setDelegate:(id)newDelegate synchronously:(BOOL)synchronously
+{
+	dispatch_block_t block = ^{
+        self->delegate = newDelegate;
+	};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey)) {
+		block();
+	}
+	else {
+		if (synchronously)
+			dispatch_sync(socketQueue, block);
+		else
+			dispatch_async(socketQueue, block);
+	}
+}
+
+- (void)setDelegate:(id)newDelegate
+{
+	[self setDelegate:newDelegate synchronously:NO];
+}
+
+- (void)synchronouslySetDelegate:(id)newDelegate
+{
+	[self setDelegate:newDelegate synchronously:YES];
+}
+
+- (dispatch_queue_t)delegateQueue
+{
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+	{
+		return delegateQueue;
+	}
+	else
+	{
+		__block dispatch_queue_t result;
+		
+		dispatch_sync(socketQueue, ^{
+            result = self->delegateQueue;
+		});
+		
+		return result;
+	}
+}
+
+- (void)setDelegateQueue:(dispatch_queue_t)newDelegateQueue synchronously:(BOOL)synchronously
+{
+	dispatch_block_t block = ^{
+		
+		#if !OS_OBJECT_USE_OBJC
+        if (self->delegateQueue) dispatch_release(self->delegateQueue);
+		if (newDelegateQueue) dispatch_retain(newDelegateQueue);
+		#endif
+		
+        self->delegateQueue = newDelegateQueue;
+	};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey)) {
+		block();
+	}
+	else {
+		if (synchronously)
+			dispatch_sync(socketQueue, block);
+		else
+			dispatch_async(socketQueue, block);
+	}
+}
+
+- (void)setDelegateQueue:(dispatch_queue_t)newDelegateQueue
+{
+	[self setDelegateQueue:newDelegateQueue synchronously:NO];
+}
+
+- (void)synchronouslySetDelegateQueue:(dispatch_queue_t)newDelegateQueue
+{
+	[self setDelegateQueue:newDelegateQueue synchronously:YES];
+}
+
+- (void)getDelegate:(id<GCDAsyncSocketDelegate> *)delegatePtr delegateQueue:(dispatch_queue_t *)delegateQueuePtr
+{
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+	{
+		if (delegatePtr) *delegatePtr = delegate;
+		if (delegateQueuePtr) *delegateQueuePtr = delegateQueue;
+	}
+	else
+	{
+		__block id dPtr = NULL;
+		__block dispatch_queue_t dqPtr = NULL;
+		
+		dispatch_sync(socketQueue, ^{
+            dPtr = self->delegate;
+            dqPtr = self->delegateQueue;
+		});
+		
+		if (delegatePtr) *delegatePtr = dPtr;
+		if (delegateQueuePtr) *delegateQueuePtr = dqPtr;
+	}
+}
+
+- (void)setDelegate:(id)newDelegate delegateQueue:(dispatch_queue_t)newDelegateQueue synchronously:(BOOL)synchronously
+{
+	dispatch_block_t block = ^{
+		
+        self->delegate = newDelegate;
+		
+		#if !OS_OBJECT_USE_OBJC
+        if (self->delegateQueue) dispatch_release(self->delegateQueue);
+		if (newDelegateQueue) dispatch_retain(newDelegateQueue);
+		#endif
+		
+        self->delegateQueue = newDelegateQueue;
+	};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey)) {
+		block();
+	}
+	else {
+		if (synchronously)
+			dispatch_sync(socketQueue, block);
+		else
+			dispatch_async(socketQueue, block);
+	}
+}
+
+- (void)setDelegate:(id)newDelegate delegateQueue:(dispatch_queue_t)newDelegateQueue
+{
+	[self setDelegate:newDelegate delegateQueue:newDelegateQueue synchronously:NO];
+}
+
+- (void)synchronouslySetDelegate:(id)newDelegate delegateQueue:(dispatch_queue_t)newDelegateQueue
+{
+	[self setDelegate:newDelegate delegateQueue:newDelegateQueue synchronously:YES];
+}
+
+- (BOOL)isIPv4Enabled
+{
+	// Note: YES means kIPv4Disabled is OFF
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+	{
+		return ((config & kIPv4Disabled) == 0);
+	}
+	else
+	{
+		__block BOOL result;
+		
+		dispatch_sync(socketQueue, ^{
+            result = ((self->config & kIPv4Disabled) == 0);
+		});
+		
+		return result;
+	}
+}
+
+- (void)setIPv4Enabled:(BOOL)flag
+{
+	// Note: YES means kIPv4Disabled is OFF
+	
+	dispatch_block_t block = ^{
+		
+		if (flag)
+            self->config &= ~kIPv4Disabled;
+		else
+            self->config |= kIPv4Disabled;
+	};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_async(socketQueue, block);
+}
+
+- (BOOL)isIPv6Enabled
+{
+	// Note: YES means kIPv6Disabled is OFF
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+	{
+		return ((config & kIPv6Disabled) == 0);
+	}
+	else
+	{
+		__block BOOL result;
+		
+		dispatch_sync(socketQueue, ^{
+            result = ((self->config & kIPv6Disabled) == 0);
+		});
+		
+		return result;
+	}
+}
+
+- (void)setIPv6Enabled:(BOOL)flag
+{
+	// Note: YES means kIPv6Disabled is OFF
+	
+	dispatch_block_t block = ^{
+		
+		if (flag)
+            self->config &= ~kIPv6Disabled;
+		else
+            self->config |= kIPv6Disabled;
+	};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_async(socketQueue, block);
+}
+
+- (BOOL)isIPv4PreferredOverIPv6
+{
+	// Note: YES means kPreferIPv6 is OFF
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+	{
+		return ((config & kPreferIPv6) == 0);
+	}
+	else
+	{
+		__block BOOL result;
+		
+		dispatch_sync(socketQueue, ^{
+            result = ((self->config & kPreferIPv6) == 0);
+		});
+		
+		return result;
+	}
+}
+
+- (void)setIPv4PreferredOverIPv6:(BOOL)flag
+{
+	// Note: YES means kPreferIPv6 is OFF
+	
+	dispatch_block_t block = ^{
+		
+		if (flag)
+            self->config &= ~kPreferIPv6;
+		else
+            self->config |= kPreferIPv6;
+	};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_async(socketQueue, block);
+}
+
+- (NSTimeInterval) alternateAddressDelay {
+    __block NSTimeInterval delay;
+    dispatch_block_t block = ^{
+        delay = self->alternateAddressDelay;
+    };
+    if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+        block();
+    else
+        dispatch_sync(socketQueue, block);
+    return delay;
+}
+
+- (void) setAlternateAddressDelay:(NSTimeInterval)delay {
+    dispatch_block_t block = ^{
+        self->alternateAddressDelay = delay;
+    };
+    if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+        block();
+    else
+        dispatch_async(socketQueue, block);
+}
+
+- (id)userData
+{
+	__block id result = nil;
+	
+	dispatch_block_t block = ^{
+		
+        result = self->userData;
+	};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_sync(socketQueue, block);
+	
+	return result;
+}
+
+- (void)setUserData:(id)arbitraryUserData
+{
+	dispatch_block_t block = ^{
+		
+        if (self->userData != arbitraryUserData)
+		{
+            self->userData = arbitraryUserData;
+		}
+	};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_async(socketQueue, block);
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+#pragma mark Accepting
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+- (BOOL)acceptOnPort:(uint16_t)port error:(NSError **)errPtr
+{
+	return [self acceptOnInterface:nil port:port error:errPtr];
+}
+
+- (BOOL)acceptOnInterface:(NSString *)inInterface port:(uint16_t)port error:(NSError **)errPtr
+{
+	LogTrace();
+	
+	// Just in-case interface parameter is immutable.
+	NSString *interface = [inInterface copy];
+	
+	__block BOOL result = NO;
+	__block NSError *err = nil;
+	
+	// CreateSocket Block
+	// This block will be invoked within the dispatch block below.
+	
+	int(^createSocket)(int, NSData*) = ^int (int domain, NSData *interfaceAddr) {
+		
+		int socketFD = socket(domain, SOCK_STREAM, 0);
+		
+		if (socketFD == SOCKET_NULL)
+		{
+			NSString *reason = @"Error in socket() function";
+			err = [self errnoErrorWithReason:reason];
+			
+			return SOCKET_NULL;
+		}
+		
+		int status;
+		
+		// Set socket options
+		
+		status = fcntl(socketFD, F_SETFL, O_NONBLOCK);
+		if (status == -1)
+		{
+			NSString *reason = @"Error enabling non-blocking IO on socket (fcntl)";
+			err = [self errnoErrorWithReason:reason];
+			
+			LogVerbose(@"close(socketFD)");
+			close(socketFD);
+			return SOCKET_NULL;
+		}
+		
+		int reuseOn = 1;
+		status = setsockopt(socketFD, SOL_SOCKET, SO_REUSEADDR, &reuseOn, sizeof(reuseOn));
+		if (status == -1)
+		{
+			NSString *reason = @"Error enabling address reuse (setsockopt)";
+			err = [self errnoErrorWithReason:reason];
+			
+			LogVerbose(@"close(socketFD)");
+			close(socketFD);
+			return SOCKET_NULL;
+		}
+		
+		// Bind socket
+		
+		status = bind(socketFD, (const struct sockaddr *)[interfaceAddr bytes], (socklen_t)[interfaceAddr length]);
+		if (status == -1)
+		{
+			NSString *reason = @"Error in bind() function";
+			err = [self errnoErrorWithReason:reason];
+			
+			LogVerbose(@"close(socketFD)");
+			close(socketFD);
+			return SOCKET_NULL;
+		}
+		
+		// Listen
+		
+		status = listen(socketFD, 1024);
+		if (status == -1)
+		{
+			NSString *reason = @"Error in listen() function";
+			err = [self errnoErrorWithReason:reason];
+			
+			LogVerbose(@"close(socketFD)");
+			close(socketFD);
+			return SOCKET_NULL;
+		}
+		
+		return socketFD;
+	};
+	
+	// Create dispatch block and run on socketQueue
+	
+	dispatch_block_t block = ^{ @autoreleasepool {
+		
+        if (self->delegate == nil) // Must have delegate set
+		{
+			NSString *msg = @"Attempting to accept without a delegate. Set a delegate first.";
+			err = [self badConfigError:msg];
+			
+			return_from_block;
+		}
+		
+        if (self->delegateQueue == NULL) // Must have delegate queue set
+		{
+			NSString *msg = @"Attempting to accept without a delegate queue. Set a delegate queue first.";
+			err = [self badConfigError:msg];
+			
+			return_from_block;
+		}
+		
+        BOOL isIPv4Disabled = (self->config & kIPv4Disabled) ? YES : NO;
+        BOOL isIPv6Disabled = (self->config & kIPv6Disabled) ? YES : NO;
+		
+		if (isIPv4Disabled && isIPv6Disabled) // Must have IPv4 or IPv6 enabled
+		{
+			NSString *msg = @"Both IPv4 and IPv6 have been disabled. Must enable at least one protocol first.";
+			err = [self badConfigError:msg];
+			
+			return_from_block;
+		}
+		
+		if (![self isDisconnected]) // Must be disconnected
+		{
+			NSString *msg = @"Attempting to accept while connected or accepting connections. Disconnect first.";
+			err = [self badConfigError:msg];
+			
+			return_from_block;
+		}
+		
+		// Clear queues (spurious read/write requests post disconnect)
+        [self->readQueue removeAllObjects];
+        [self->writeQueue removeAllObjects];
+		
+		// Resolve interface from description
+		
+		NSMutableData *interface4 = nil;
+		NSMutableData *interface6 = nil;
+		
+		[self getInterfaceAddress4:&interface4 address6:&interface6 fromDescription:interface port:port];
+		
+		if ((interface4 == nil) && (interface6 == nil))
+		{
+			NSString *msg = @"Unknown interface. Specify valid interface by name (e.g. \"en1\") or IP address.";
+			err = [self badParamError:msg];
+			
+			return_from_block;
+		}
+		
+		if (isIPv4Disabled && (interface6 == nil))
+		{
+			NSString *msg = @"IPv4 has been disabled and specified interface doesn't support IPv6.";
+			err = [self badParamError:msg];
+			
+			return_from_block;
+		}
+		
+		if (isIPv6Disabled && (interface4 == nil))
+		{
+			NSString *msg = @"IPv6 has been disabled and specified interface doesn't support IPv4.";
+			err = [self badParamError:msg];
+			
+			return_from_block;
+		}
+		
+		BOOL enableIPv4 = !isIPv4Disabled && (interface4 != nil);
+		BOOL enableIPv6 = !isIPv6Disabled && (interface6 != nil);
+		
+		// Create sockets, configure, bind, and listen
+		
+		if (enableIPv4)
+		{
+			LogVerbose(@"Creating IPv4 socket");
+            self->socket4FD = createSocket(AF_INET, interface4);
+			
+            if (self->socket4FD == SOCKET_NULL)
+			{
+				return_from_block;
+			}
+		}
+		
+		if (enableIPv6)
+		{
+			LogVerbose(@"Creating IPv6 socket");
+			
+			if (enableIPv4 && (port == 0))
+			{
+				// No specific port was specified, so we allowed the OS to pick an available port for us.
+				// Now we need to make sure the IPv6 socket listens on the same port as the IPv4 socket.
+				
+				struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)[interface6 mutableBytes];
+				addr6->sin6_port = htons([self localPort4]);
+			}
+			
+            self->socket6FD = createSocket(AF_INET6, interface6);
+			
+            if (self->socket6FD == SOCKET_NULL)
+			{
+                if (self->socket4FD != SOCKET_NULL)
+				{
+					LogVerbose(@"close(socket4FD)");
+                    close(self->socket4FD);
+				}
+				
+				return_from_block;
+			}
+		}
+		
+		// Create accept sources
+		
+		if (enableIPv4)
+		{
+            self->accept4Source = dispatch_source_create(DISPATCH_SOURCE_TYPE_READ, self->socket4FD, 0, self->socketQueue);
+			
+            int socketFD = self->socket4FD;
+            dispatch_source_t acceptSource = self->accept4Source;
+			
+			__weak GCDAsyncSocket *weakSelf = self;
+			
+            dispatch_source_set_event_handler(self->accept4Source, ^{ @autoreleasepool {
+			#pragma clang diagnostic push
+			#pragma clang diagnostic warning "-Wimplicit-retain-self"
+				
+				__strong GCDAsyncSocket *strongSelf = weakSelf;
+				if (strongSelf == nil) return_from_block;
+				
+				LogVerbose(@"event4Block");
+				
+				unsigned long i = 0;
+				unsigned long numPendingConnections = dispatch_source_get_data(acceptSource);
+				
+				LogVerbose(@"numPendingConnections: %lu", numPendingConnections);
+				
+				while ([strongSelf doAccept:socketFD] && (++i < numPendingConnections));
+				
+			#pragma clang diagnostic pop
+			}});
+			
+			
+            dispatch_source_set_cancel_handler(self->accept4Source, ^{
+			#pragma clang diagnostic push
+			#pragma clang diagnostic warning "-Wimplicit-retain-self"
+				
+				#if !OS_OBJECT_USE_OBJC
+				LogVerbose(@"dispatch_release(accept4Source)");
+				dispatch_release(acceptSource);
+				#endif
+				
+				LogVerbose(@"close(socket4FD)");
+				close(socketFD);
+			
+			#pragma clang diagnostic pop
+			});
+			
+			LogVerbose(@"dispatch_resume(accept4Source)");
+            dispatch_resume(self->accept4Source);
+		}
+		
+		if (enableIPv6)
+		{
+            self->accept6Source = dispatch_source_create(DISPATCH_SOURCE_TYPE_READ, self->socket6FD, 0, self->socketQueue);
+			
+            int socketFD = self->socket6FD;
+            dispatch_source_t acceptSource = self->accept6Source;
+			
+			__weak GCDAsyncSocket *weakSelf = self;
+			
+            dispatch_source_set_event_handler(self->accept6Source, ^{ @autoreleasepool {
+			#pragma clang diagnostic push
+			#pragma clang diagnostic warning "-Wimplicit-retain-self"
+				
+				__strong GCDAsyncSocket *strongSelf = weakSelf;
+				if (strongSelf == nil) return_from_block;
+				
+				LogVerbose(@"event6Block");
+				
+				unsigned long i = 0;
+				unsigned long numPendingConnections = dispatch_source_get_data(acceptSource);
+				
+				LogVerbose(@"numPendingConnections: %lu", numPendingConnections);
+				
+				while ([strongSelf doAccept:socketFD] && (++i < numPendingConnections));
+				
+			#pragma clang diagnostic pop
+			}});
+			
+            dispatch_source_set_cancel_handler(self->accept6Source, ^{
+			#pragma clang diagnostic push
+			#pragma clang diagnostic warning "-Wimplicit-retain-self"
+				
+				#if !OS_OBJECT_USE_OBJC
+				LogVerbose(@"dispatch_release(accept6Source)");
+				dispatch_release(acceptSource);
+				#endif
+				
+				LogVerbose(@"close(socket6FD)");
+				close(socketFD);
+				
+			#pragma clang diagnostic pop
+			});
+			
+			LogVerbose(@"dispatch_resume(accept6Source)");
+            dispatch_resume(self->accept6Source);
+		}
+		
+        self->flags |= kSocketStarted;
+		
+		result = YES;
+	}};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_sync(socketQueue, block);
+	
+	if (result == NO)
+	{
+		LogInfo(@"Error in accept: %@", err);
+		
+		if (errPtr)
+			*errPtr = err;
+	}
+	
+	return result;
+}
+
+- (BOOL)acceptOnUrl:(NSURL *)url error:(NSError **)errPtr;
+{
+	LogTrace();
+	
+	__block BOOL result = NO;
+	__block NSError *err = nil;
+	
+	// CreateSocket Block
+	// This block will be invoked within the dispatch block below.
+	
+	int(^createSocket)(int, NSData*) = ^int (int domain, NSData *interfaceAddr) {
+		
+		int socketFD = socket(domain, SOCK_STREAM, 0);
+		
+		if (socketFD == SOCKET_NULL)
+		{
+			NSString *reason = @"Error in socket() function";
+			err = [self errnoErrorWithReason:reason];
+			
+			return SOCKET_NULL;
+		}
+		
+		int status;
+		
+		// Set socket options
+		
+		status = fcntl(socketFD, F_SETFL, O_NONBLOCK);
+		if (status == -1)
+		{
+			NSString *reason = @"Error enabling non-blocking IO on socket (fcntl)";
+			err = [self errnoErrorWithReason:reason];
+			
+			LogVerbose(@"close(socketFD)");
+			close(socketFD);
+			return SOCKET_NULL;
+		}
+		
+		int reuseOn = 1;
+		status = setsockopt(socketFD, SOL_SOCKET, SO_REUSEADDR, &reuseOn, sizeof(reuseOn));
+		if (status == -1)
+		{
+			NSString *reason = @"Error enabling address reuse (setsockopt)";
+			err = [self errnoErrorWithReason:reason];
+			
+			LogVerbose(@"close(socketFD)");
+			close(socketFD);
+			return SOCKET_NULL;
+		}
+		
+		// Bind socket
+		
+		status = bind(socketFD, (const struct sockaddr *)[interfaceAddr bytes], (socklen_t)[interfaceAddr length]);
+		if (status == -1)
+		{
+			NSString *reason = @"Error in bind() function";
+			err = [self errnoErrorWithReason:reason];
+			
+			LogVerbose(@"close(socketFD)");
+			close(socketFD);
+			return SOCKET_NULL;
+		}
+		
+		// Listen
+		
+		status = listen(socketFD, 1024);
+		if (status == -1)
+		{
+			NSString *reason = @"Error in listen() function";
+			err = [self errnoErrorWithReason:reason];
+			
+			LogVerbose(@"close(socketFD)");
+			close(socketFD);
+			return SOCKET_NULL;
+		}
+		
+		return socketFD;
+	};
+	
+	// Create dispatch block and run on socketQueue
+	
+	dispatch_block_t block = ^{ @autoreleasepool {
+		
+        if (self->delegate == nil) // Must have delegate set
+		{
+			NSString *msg = @"Attempting to accept without a delegate. Set a delegate first.";
+			err = [self badConfigError:msg];
+			
+			return_from_block;
+		}
+		
+        if (self->delegateQueue == NULL) // Must have delegate queue set
+		{
+			NSString *msg = @"Attempting to accept without a delegate queue. Set a delegate queue first.";
+			err = [self badConfigError:msg];
+			
+			return_from_block;
+		}
+		
+		if (![self isDisconnected]) // Must be disconnected
+		{
+			NSString *msg = @"Attempting to accept while connected or accepting connections. Disconnect first.";
+			err = [self badConfigError:msg];
+			
+			return_from_block;
+		}
+		
+		// Clear queues (spurious read/write requests post disconnect)
+        [self->readQueue removeAllObjects];
+        [self->writeQueue removeAllObjects];
+		
+		// Remove a previous socket
+		
+		NSError *error = nil;
+		NSFileManager *fileManager = [NSFileManager defaultManager];
+		if ([fileManager fileExistsAtPath:url.path]) {
+			if (![[NSFileManager defaultManager] removeItemAtURL:url error:&error]) {
+				NSString *msg = @"Could not remove previous unix domain socket at given url.";
+				err = [self otherError:msg];
+				
+				return_from_block;
+			}
+		}
+		
+		// Resolve interface from description
+		
+		NSData *interface = [self getInterfaceAddressFromUrl:url];
+		
+		if (interface == nil)
+		{
+			NSString *msg = @"Invalid unix domain url. Specify a valid file url that does not exist (e.g. \"file:///tmp/socket\")";
+			err = [self badParamError:msg];
+			
+			return_from_block;
+		}
+		
+		// Create sockets, configure, bind, and listen
+		
+		LogVerbose(@"Creating unix domain socket");
+        self->socketUN = createSocket(AF_UNIX, interface);
+		
+        if (self->socketUN == SOCKET_NULL)
+		{
+			return_from_block;
+		}
+		
+        self->socketUrl = url;
+		
+		// Create accept sources
+		
+        self->acceptUNSource = dispatch_source_create(DISPATCH_SOURCE_TYPE_READ, self->socketUN, 0, self->socketQueue);
+		
+        int socketFD = self->socketUN;
+        dispatch_source_t acceptSource = self->acceptUNSource;
+		
+        dispatch_source_set_event_handler(self->acceptUNSource, ^{ @autoreleasepool {
+			
+			LogVerbose(@"eventUNBlock");
+			
+			unsigned long i = 0;
+			unsigned long numPendingConnections = dispatch_source_get_data(acceptSource);
+			
+			LogVerbose(@"numPendingConnections: %lu", numPendingConnections);
+			
+			while ([self doAccept:socketFD] && (++i < numPendingConnections));
+		}});
+		
+        dispatch_source_set_cancel_handler(self->acceptUNSource, ^{
+			
+#if NEEDS_DISPATCH_RETAIN_RELEASE
+			LogVerbose(@"dispatch_release(accept4Source)");
+			dispatch_release(acceptSource);
+#endif
+			
+			LogVerbose(@"close(socket4FD)");
+			close(socketFD);
+		});
+		
+		LogVerbose(@"dispatch_resume(accept4Source)");
+        dispatch_resume(self->acceptUNSource);
+		
+        self->flags |= kSocketStarted;
+		
+		result = YES;
+	}};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_sync(socketQueue, block);
+	
+	if (result == NO)
+	{
+		LogInfo(@"Error in accept: %@", err);
+		
+		if (errPtr)
+			*errPtr = err;
+	}
+	
+	return result;	
+}
+
+- (BOOL)doAccept:(int)parentSocketFD
+{
+	LogTrace();
+	
+	int socketType;
+	int childSocketFD;
+	NSData *childSocketAddress;
+	
+	if (parentSocketFD == socket4FD)
+	{
+		socketType = 0;
+		
+		struct sockaddr_in addr;
+		socklen_t addrLen = sizeof(addr);
+		
+		childSocketFD = accept(parentSocketFD, (struct sockaddr *)&addr, &addrLen);
+		
+		if (childSocketFD == -1)
+		{
+			LogWarn(@"Accept failed with error: %@", [self errnoError]);
+			return NO;
+		}
+		
+		childSocketAddress = [NSData dataWithBytes:&addr length:addrLen];
+	}
+	else if (parentSocketFD == socket6FD)
+	{
+		socketType = 1;
+		
+		struct sockaddr_in6 addr;
+		socklen_t addrLen = sizeof(addr);
+		
+		childSocketFD = accept(parentSocketFD, (struct sockaddr *)&addr, &addrLen);
+		
+		if (childSocketFD == -1)
+		{
+			LogWarn(@"Accept failed with error: %@", [self errnoError]);
+			return NO;
+		}
+		
+		childSocketAddress = [NSData dataWithBytes:&addr length:addrLen];
+	}
+	else // if (parentSocketFD == socketUN)
+	{
+		socketType = 2;
+		
+		struct sockaddr_un addr;
+		socklen_t addrLen = sizeof(addr);
+		
+		childSocketFD = accept(parentSocketFD, (struct sockaddr *)&addr, &addrLen);
+		
+		if (childSocketFD == -1)
+		{
+			LogWarn(@"Accept failed with error: %@", [self errnoError]);
+			return NO;
+		}
+		
+		childSocketAddress = [NSData dataWithBytes:&addr length:addrLen];
+	}
+	
+	// Enable non-blocking IO on the socket
+	
+	int result = fcntl(childSocketFD, F_SETFL, O_NONBLOCK);
+	if (result == -1)
+	{
+		LogWarn(@"Error enabling non-blocking IO on accepted socket (fcntl)");
+		LogVerbose(@"close(childSocketFD)");
+		close(childSocketFD);
+		return NO;
+	}
+	
+	// Prevent SIGPIPE signals
+	
+	int nosigpipe = 1;
+	setsockopt(childSocketFD, SOL_SOCKET, SO_NOSIGPIPE, &nosigpipe, sizeof(nosigpipe));
+	
+	// Notify delegate
+	
+	if (delegateQueue)
+	{
+		__strong id theDelegate = delegate;
+		
+		dispatch_async(delegateQueue, ^{ @autoreleasepool {
+			
+			// Query delegate for custom socket queue
+			
+			dispatch_queue_t childSocketQueue = NULL;
+			
+			if ([theDelegate respondsToSelector:@selector(newSocketQueueForConnectionFromAddress:onSocket:)])
+			{
+				childSocketQueue = [theDelegate newSocketQueueForConnectionFromAddress:childSocketAddress
+				                                                              onSocket:self];
+			}
+			
+			// Create GCDAsyncSocket instance for accepted socket
+			
+			GCDAsyncSocket *acceptedSocket = [[[self class] alloc] initWithDelegate:theDelegate
+                                                                      delegateQueue:self->delegateQueue
+																		socketQueue:childSocketQueue];
+			
+			if (socketType == 0)
+				acceptedSocket->socket4FD = childSocketFD;
+			else if (socketType == 1)
+				acceptedSocket->socket6FD = childSocketFD;
+			else
+				acceptedSocket->socketUN = childSocketFD;
+			
+			acceptedSocket->flags = (kSocketStarted | kConnected);
+			
+			// Setup read and write sources for accepted socket
+			
+			dispatch_async(acceptedSocket->socketQueue, ^{ @autoreleasepool {
+				
+				[acceptedSocket setupReadAndWriteSourcesForNewlyConnectedSocket:childSocketFD];
+			}});
+			
+			// Notify delegate
+			
+			if ([theDelegate respondsToSelector:@selector(socket:didAcceptNewSocket:)])
+			{
+				[theDelegate socket:self didAcceptNewSocket:acceptedSocket];
+			}
+			
+			// Release the socket queue returned from the delegate (it was retained by acceptedSocket)
+			#if !OS_OBJECT_USE_OBJC
+			if (childSocketQueue) dispatch_release(childSocketQueue);
+			#endif
+			
+			// The accepted socket should have been retained by the delegate.
+			// Otherwise it gets properly released when exiting the block.
+		}});
+	}
+	
+	return YES;
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+#pragma mark Connecting
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+/**
+ * This method runs through the various checks required prior to a connection attempt.
+ * It is shared between the connectToHost and connectToAddress methods.
+ * 
+**/
+- (BOOL)preConnectWithInterface:(NSString *)interface error:(NSError **)errPtr
+{
+	NSAssert(dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey), @"Must be dispatched on socketQueue");
+	
+	if (delegate == nil) // Must have delegate set
+	{
+		if (errPtr)
+		{
+			NSString *msg = @"Attempting to connect without a delegate. Set a delegate first.";
+			*errPtr = [self badConfigError:msg];
+		}
+		return NO;
+	}
+	
+	if (delegateQueue == NULL) // Must have delegate queue set
+	{
+		if (errPtr)
+		{
+			NSString *msg = @"Attempting to connect without a delegate queue. Set a delegate queue first.";
+			*errPtr = [self badConfigError:msg];
+		}
+		return NO;
+	}
+	
+	if (![self isDisconnected]) // Must be disconnected
+	{
+		if (errPtr)
+		{
+			NSString *msg = @"Attempting to connect while connected or accepting connections. Disconnect first.";
+			*errPtr = [self badConfigError:msg];
+		}
+		return NO;
+	}
+	
+	BOOL isIPv4Disabled = (config & kIPv4Disabled) ? YES : NO;
+	BOOL isIPv6Disabled = (config & kIPv6Disabled) ? YES : NO;
+	
+	if (isIPv4Disabled && isIPv6Disabled) // Must have IPv4 or IPv6 enabled
+	{
+		if (errPtr)
+		{
+			NSString *msg = @"Both IPv4 and IPv6 have been disabled. Must enable at least one protocol first.";
+			*errPtr = [self badConfigError:msg];
+		}
+		return NO;
+	}
+	
+	if (interface)
+	{
+		NSMutableData *interface4 = nil;
+		NSMutableData *interface6 = nil;
+		
+		[self getInterfaceAddress4:&interface4 address6:&interface6 fromDescription:interface port:0];
+		
+		if ((interface4 == nil) && (interface6 == nil))
+		{
+			if (errPtr)
+			{
+				NSString *msg = @"Unknown interface. Specify valid interface by name (e.g. \"en1\") or IP address.";
+				*errPtr = [self badParamError:msg];
+			}
+			return NO;
+		}
+		
+		if (isIPv4Disabled && (interface6 == nil))
+		{
+			if (errPtr)
+			{
+				NSString *msg = @"IPv4 has been disabled and specified interface doesn't support IPv6.";
+				*errPtr = [self badParamError:msg];
+			}
+			return NO;
+		}
+		
+		if (isIPv6Disabled && (interface4 == nil))
+		{
+			if (errPtr)
+			{
+				NSString *msg = @"IPv6 has been disabled and specified interface doesn't support IPv4.";
+				*errPtr = [self badParamError:msg];
+			}
+			return NO;
+		}
+		
+		connectInterface4 = interface4;
+		connectInterface6 = interface6;
+	}
+	
+	// Clear queues (spurious read/write requests post disconnect)
+	[readQueue removeAllObjects];
+	[writeQueue removeAllObjects];
+	
+	return YES;
+}
+
+- (BOOL)preConnectWithUrl:(NSURL *)url error:(NSError **)errPtr
+{
+	NSAssert(dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey), @"Must be dispatched on socketQueue");
+	
+	if (delegate == nil) // Must have delegate set
+	{
+		if (errPtr)
+		{
+			NSString *msg = @"Attempting to connect without a delegate. Set a delegate first.";
+			*errPtr = [self badConfigError:msg];
+		}
+		return NO;
+	}
+	
+	if (delegateQueue == NULL) // Must have delegate queue set
+	{
+		if (errPtr)
+		{
+			NSString *msg = @"Attempting to connect without a delegate queue. Set a delegate queue first.";
+			*errPtr = [self badConfigError:msg];
+		}
+		return NO;
+	}
+	
+	if (![self isDisconnected]) // Must be disconnected
+	{
+		if (errPtr)
+		{
+			NSString *msg = @"Attempting to connect while connected or accepting connections. Disconnect first.";
+			*errPtr = [self badConfigError:msg];
+		}
+		return NO;
+	}
+	
+	NSData *interface = [self getInterfaceAddressFromUrl:url];
+	
+	if (interface == nil)
+	{
+		if (errPtr)
+		{
+			NSString *msg = @"Unknown interface. Specify valid interface by name (e.g. \"en1\") or IP address.";
+			*errPtr = [self badParamError:msg];
+		}
+		return NO;
+	}
+	
+	connectInterfaceUN = interface;
+	
+	// Clear queues (spurious read/write requests post disconnect)
+	[readQueue removeAllObjects];
+	[writeQueue removeAllObjects];
+	
+	return YES;
+}
+
+- (BOOL)connectToHost:(NSString*)host onPort:(uint16_t)port error:(NSError **)errPtr
+{
+	return [self connectToHost:host onPort:port withTimeout:-1 error:errPtr];
+}
+
+- (BOOL)connectToHost:(NSString *)host
+               onPort:(uint16_t)port
+          withTimeout:(NSTimeInterval)timeout
+                error:(NSError **)errPtr
+{
+	return [self connectToHost:host onPort:port viaInterface:nil withTimeout:timeout error:errPtr];
+}
+
+- (BOOL)connectToHost:(NSString *)inHost
+               onPort:(uint16_t)port
+         viaInterface:(NSString *)inInterface
+          withTimeout:(NSTimeInterval)timeout
+                error:(NSError **)errPtr
+{
+	LogTrace();
+	
+	// Just in case immutable objects were passed
+	NSString *host = [inHost copy];
+	NSString *interface = [inInterface copy];
+	
+	__block BOOL result = NO;
+	__block NSError *preConnectErr = nil;
+	
+	dispatch_block_t block = ^{ @autoreleasepool {
+		
+		// Check for problems with host parameter
+		
+		if ([host length] == 0)
+		{
+			NSString *msg = @"Invalid host parameter (nil or \"\"). Should be a domain name or IP address string.";
+			preConnectErr = [self badParamError:msg];
+			
+			return_from_block;
+		}
+		
+		// Run through standard pre-connect checks
+		
+		if (![self preConnectWithInterface:interface error:&preConnectErr])
+		{
+			return_from_block;
+		}
+		
+		// We've made it past all the checks.
+		// It's time to start the connection process.
+		
+        self->flags |= kSocketStarted;
+		
+		LogVerbose(@"Dispatching DNS lookup...");
+		
+		// It's possible that the given host parameter is actually a NSMutableString.
+		// So we want to copy it now, within this block that will be executed synchronously.
+		// This way the asynchronous lookup block below doesn't have to worry about it changing.
+		
+		NSString *hostCpy = [host copy];
+		
+        int aStateIndex = self->stateIndex;
+		__weak GCDAsyncSocket *weakSelf = self;
+		
+		dispatch_queue_t globalConcurrentQueue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
+		dispatch_async(globalConcurrentQueue, ^{ @autoreleasepool {
+		#pragma clang diagnostic push
+		#pragma clang diagnostic warning "-Wimplicit-retain-self"
+			
+			NSError *lookupErr = nil;
+			NSMutableArray *addresses = [[self class] lookupHost:hostCpy port:port error:&lookupErr];
+			
+			__strong GCDAsyncSocket *strongSelf = weakSelf;
+			if (strongSelf == nil) return_from_block;
+			
+			if (lookupErr)
+			{
+				dispatch_async(strongSelf->socketQueue, ^{ @autoreleasepool {
+					
+					[strongSelf lookup:aStateIndex didFail:lookupErr];
+				}});
+			}
+			else
+			{
+				NSData *address4 = nil;
+				NSData *address6 = nil;
+				
+				for (NSData *address in addresses)
+				{
+					if (!address4 && [[self class] isIPv4Address:address])
+					{
+						address4 = address;
+					}
+					else if (!address6 && [[self class] isIPv6Address:address])
+					{
+						address6 = address;
+					}
+				}
+				
+				dispatch_async(strongSelf->socketQueue, ^{ @autoreleasepool {
+					
+					[strongSelf lookup:aStateIndex didSucceedWithAddress4:address4 address6:address6];
+				}});
+			}
+			
+		#pragma clang diagnostic pop
+		}});
+		
+		[self startConnectTimeout:timeout];
+		
+		result = YES;
+	}};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_sync(socketQueue, block);
+	
+	
+	if (errPtr) *errPtr = preConnectErr;
+	return result;
+}
+
+- (BOOL)connectToAddress:(NSData *)remoteAddr error:(NSError **)errPtr
+{
+	return [self connectToAddress:remoteAddr viaInterface:nil withTimeout:-1 error:errPtr];
+}
+
+- (BOOL)connectToAddress:(NSData *)remoteAddr withTimeout:(NSTimeInterval)timeout error:(NSError **)errPtr
+{
+	return [self connectToAddress:remoteAddr viaInterface:nil withTimeout:timeout error:errPtr];
+}
+
+- (BOOL)connectToAddress:(NSData *)inRemoteAddr
+            viaInterface:(NSString *)inInterface
+             withTimeout:(NSTimeInterval)timeout
+                   error:(NSError **)errPtr
+{
+	LogTrace();
+	
+	// Just in case immutable objects were passed
+	NSData *remoteAddr = [inRemoteAddr copy];
+	NSString *interface = [inInterface copy];
+	
+	__block BOOL result = NO;
+	__block NSError *err = nil;
+	
+	dispatch_block_t block = ^{ @autoreleasepool {
+		
+		// Check for problems with remoteAddr parameter
+		
+		NSData *address4 = nil;
+		NSData *address6 = nil;
+		
+		if ([remoteAddr length] >= sizeof(struct sockaddr))
+		{
+			const struct sockaddr *sockaddr = (const struct sockaddr *)[remoteAddr bytes];
+			
+			if (sockaddr->sa_family == AF_INET)
+			{
+				if ([remoteAddr length] == sizeof(struct sockaddr_in))
+				{
+					address4 = remoteAddr;
+				}
+			}
+			else if (sockaddr->sa_family == AF_INET6)
+			{
+				if ([remoteAddr length] == sizeof(struct sockaddr_in6))
+				{
+					address6 = remoteAddr;
+				}
+			}
+		}
+		
+		if ((address4 == nil) && (address6 == nil))
+		{
+			NSString *msg = @"A valid IPv4 or IPv6 address was not given";
+			err = [self badParamError:msg];
+			
+			return_from_block;
+		}
+		
+        BOOL isIPv4Disabled = (self->config & kIPv4Disabled) ? YES : NO;
+        BOOL isIPv6Disabled = (self->config & kIPv6Disabled) ? YES : NO;
+		
+		if (isIPv4Disabled && (address4 != nil))
+		{
+			NSString *msg = @"IPv4 has been disabled and an IPv4 address was passed.";
+			err = [self badParamError:msg];
+			
+			return_from_block;
+		}
+		
+		if (isIPv6Disabled && (address6 != nil))
+		{
+			NSString *msg = @"IPv6 has been disabled and an IPv6 address was passed.";
+			err = [self badParamError:msg];
+			
+			return_from_block;
+		}
+		
+		// Run through standard pre-connect checks
+		
+		if (![self preConnectWithInterface:interface error:&err])
+		{
+			return_from_block;
+		}
+		
+		// We've made it past all the checks.
+		// It's time to start the connection process.
+		
+		if (![self connectWithAddress4:address4 address6:address6 error:&err])
+		{
+			return_from_block;
+		}
+		
+        self->flags |= kSocketStarted;
+		
+		[self startConnectTimeout:timeout];
+		
+		result = YES;
+	}};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_sync(socketQueue, block);
+	
+	if (result == NO)
+	{
+		if (errPtr)
+			*errPtr = err;
+	}
+	
+	return result;
+}
+
+- (BOOL)connectToUrl:(NSURL *)url withTimeout:(NSTimeInterval)timeout error:(NSError **)errPtr;
+{
+	LogTrace();
+	
+	__block BOOL result = NO;
+	__block NSError *err = nil;
+	
+	dispatch_block_t block = ^{ @autoreleasepool {
+		
+		// Check for problems with host parameter
+		
+		if ([url.path length] == 0)
+		{
+			NSString *msg = @"Invalid unix domain socket url.";
+			err = [self badParamError:msg];
+			
+			return_from_block;
+		}
+		
+		// Run through standard pre-connect checks
+		
+		if (![self preConnectWithUrl:url error:&err])
+		{
+			return_from_block;
+		}
+		
+		// We've made it past all the checks.
+		// It's time to start the connection process.
+		
+        self->flags |= kSocketStarted;
+		
+		// Start the normal connection process
+		
+		NSError *connectError = nil;
+        if (![self connectWithAddressUN:self->connectInterfaceUN error:&connectError])
+		{
+			[self closeWithError:connectError];
+			
+			return_from_block;
+		}
+
+		[self startConnectTimeout:timeout];
+		
+		result = YES;
+	}};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_sync(socketQueue, block);
+	
+	if (result == NO)
+	{
+		if (errPtr)
+			*errPtr = err;
+	}
+	
+	return result;
+}
+
+- (void)lookup:(int)aStateIndex didSucceedWithAddress4:(NSData *)address4 address6:(NSData *)address6
+{
+	LogTrace();
+	
+	NSAssert(dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey), @"Must be dispatched on socketQueue");
+	NSAssert(address4 || address6, @"Expected at least one valid address");
+	
+	if (aStateIndex != stateIndex)
+	{
+		LogInfo(@"Ignoring lookupDidSucceed, already disconnected");
+		
+		// The connect operation has been cancelled.
+		// That is, socket was disconnected, or connection has already timed out.
+		return;
+	}
+	
+	// Check for problems
+	
+	BOOL isIPv4Disabled = (config & kIPv4Disabled) ? YES : NO;
+	BOOL isIPv6Disabled = (config & kIPv6Disabled) ? YES : NO;
+	
+	if (isIPv4Disabled && (address6 == nil))
+	{
+		NSString *msg = @"IPv4 has been disabled and DNS lookup found no IPv6 address.";
+		
+		[self closeWithError:[self otherError:msg]];
+		return;
+	}
+	
+	if (isIPv6Disabled && (address4 == nil))
+	{
+		NSString *msg = @"IPv6 has been disabled and DNS lookup found no IPv4 address.";
+		
+		[self closeWithError:[self otherError:msg]];
+		return;
+	}
+	
+	// Start the normal connection process
+	
+	NSError *err = nil;
+	if (![self connectWithAddress4:address4 address6:address6 error:&err])
+	{
+		[self closeWithError:err];
+	}
+}
+
+/**
+ * This method is called if the DNS lookup fails.
+ * This method is executed on the socketQueue.
+ * 
+ * Since the DNS lookup executed synchronously on a global concurrent queue,
+ * the original connection request may have already been cancelled or timed-out by the time this method is invoked.
+ * The lookupIndex tells us whether the lookup is still valid or not.
+**/
+- (void)lookup:(int)aStateIndex didFail:(NSError *)error
+{
+	LogTrace();
+	
+	NSAssert(dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey), @"Must be dispatched on socketQueue");
+	
+	
+	if (aStateIndex != stateIndex)
+	{
+		LogInfo(@"Ignoring lookup:didFail: - already disconnected");
+		
+		// The connect operation has been cancelled.
+		// That is, socket was disconnected, or connection has already timed out.
+		return;
+	}
+	
+	[self endConnectTimeout];
+	[self closeWithError:error];
+}
+
+- (BOOL)bindSocket:(int)socketFD toInterface:(NSData *)connectInterface error:(NSError **)errPtr
+{
+    // Bind the socket to the desired interface (if needed)
+    
+    if (connectInterface)
+    {
+        LogVerbose(@"Binding socket...");
+        
+        if ([[self class] portFromAddress:connectInterface] > 0)
+        {
+            // Since we're going to be binding to a specific port,
+            // we should turn on reuseaddr to allow us to override sockets in time_wait.
+            
+            int reuseOn = 1;
+            setsockopt(socketFD, SOL_SOCKET, SO_REUSEADDR, &reuseOn, sizeof(reuseOn));
+        }
+        
+        const struct sockaddr *interfaceAddr = (const struct sockaddr *)[connectInterface bytes];
+        
+        int result = bind(socketFD, interfaceAddr, (socklen_t)[connectInterface length]);
+        if (result != 0)
+        {
+            if (errPtr)
+                *errPtr = [self errnoErrorWithReason:@"Error in bind() function"];
+            
+            return NO;
+        }
+    }
+    
+    return YES;
+}
+
+- (int)createSocket:(int)family connectInterface:(NSData *)connectInterface errPtr:(NSError **)errPtr
+{
+    int socketFD = socket(family, SOCK_STREAM, 0);
+    
+    if (socketFD == SOCKET_NULL)
+    {
+        if (errPtr)
+            *errPtr = [self errnoErrorWithReason:@"Error in socket() function"];
+        
+        return socketFD;
+    }
+    
+    if (![self bindSocket:socketFD toInterface:connectInterface error:errPtr])
+    {
+        [self closeSocket:socketFD];
+        
+        return SOCKET_NULL;
+    }
+    
+    // Prevent SIGPIPE signals
+    
+    int nosigpipe = 1;
+    setsockopt(socketFD, SOL_SOCKET, SO_NOSIGPIPE, &nosigpipe, sizeof(nosigpipe));
+    
+    return socketFD;
+}
+
+- (void)connectSocket:(int)socketFD address:(NSData *)address stateIndex:(int)aStateIndex
+{
+    // If there already is a socket connected, we close socketFD and return
+    if (self.isConnected)
+    {
+        [self closeSocket:socketFD];
+        return;
+    }
+    
+    // Start the connection process in a background queue
+    
+    __weak GCDAsyncSocket *weakSelf = self;
+    
+    dispatch_queue_t globalConcurrentQueue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
+    dispatch_async(globalConcurrentQueue, ^{
+#pragma clang diagnostic push
+#pragma clang diagnostic warning "-Wimplicit-retain-self"
+        
+        int result = connect(socketFD, (const struct sockaddr *)[address bytes], (socklen_t)[address length]);
+        
+        __strong GCDAsyncSocket *strongSelf = weakSelf;
+        if (strongSelf == nil) return_from_block;
+        
+        dispatch_async(strongSelf->socketQueue, ^{ @autoreleasepool {
+            
+            if (strongSelf.isConnected)
+            {
+                [strongSelf closeSocket:socketFD];
+                return_from_block;
+            }
+            
+            if (result == 0)
+            {
+                [self closeUnusedSocket:socketFD];
+                
+                [strongSelf didConnect:aStateIndex];
+            }
+            else
+            {
+                [strongSelf closeSocket:socketFD];
+                
+                // If there are no more sockets trying to connect, we inform the error to the delegate
+                if (strongSelf.socket4FD == SOCKET_NULL && strongSelf.socket6FD == SOCKET_NULL)
+                {
+                    NSError *error = [strongSelf errnoErrorWithReason:@"Error in connect() function"];
+                    [strongSelf didNotConnect:aStateIndex error:error];
+                }
+            }
+        }});
+        
+#pragma clang diagnostic pop
+    });
+    
+    LogVerbose(@"Connecting...");
+}
+
+- (void)closeSocket:(int)socketFD
+{
+    if (socketFD != SOCKET_NULL &&
+        (socketFD == socket6FD || socketFD == socket4FD))
+    {
+        close(socketFD);
+        
+        if (socketFD == socket4FD)
+        {
+            LogVerbose(@"close(socket4FD)");
+            socket4FD = SOCKET_NULL;
+        }
+        else if (socketFD == socket6FD)
+        {
+            LogVerbose(@"close(socket6FD)");
+            socket6FD = SOCKET_NULL;
+        }
+    }
+}
+
+- (void)closeUnusedSocket:(int)usedSocketFD
+{
+    if (usedSocketFD != socket4FD)
+    {
+        [self closeSocket:socket4FD];
+    }
+    else if (usedSocketFD != socket6FD)
+    {
+        [self closeSocket:socket6FD];
+    }
+}
+
+- (BOOL)connectWithAddress4:(NSData *)address4 address6:(NSData *)address6 error:(NSError **)errPtr
+{
+	LogTrace();
+	
+	NSAssert(dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey), @"Must be dispatched on socketQueue");
+	
+	LogVerbose(@"IPv4: %@:%hu", [[self class] hostFromAddress:address4], [[self class] portFromAddress:address4]);
+	LogVerbose(@"IPv6: %@:%hu", [[self class] hostFromAddress:address6], [[self class] portFromAddress:address6]);
+	
+	// Determine socket type
+	
+	BOOL preferIPv6 = (config & kPreferIPv6) ? YES : NO;
+	
+	// Create and bind the sockets
+    
+    if (address4)
+    {
+        LogVerbose(@"Creating IPv4 socket");
+        
+        socket4FD = [self createSocket:AF_INET connectInterface:connectInterface4 errPtr:errPtr];
+    }
+    
+    if (address6)
+    {
+        LogVerbose(@"Creating IPv6 socket");
+        
+        socket6FD = [self createSocket:AF_INET6 connectInterface:connectInterface6 errPtr:errPtr];
+    }
+    
+    if (socket4FD == SOCKET_NULL && socket6FD == SOCKET_NULL)
+    {
+        return NO;
+    }
+	
+	int socketFD, alternateSocketFD;
+	NSData *address, *alternateAddress;
+	
+    if ((preferIPv6 && socket6FD != SOCKET_NULL) || socket4FD == SOCKET_NULL)
+    {
+        socketFD = socket6FD;
+        alternateSocketFD = socket4FD;
+        address = address6;
+        alternateAddress = address4;
+    }
+    else
+    {
+        socketFD = socket4FD;
+        alternateSocketFD = socket6FD;
+        address = address4;
+        alternateAddress = address6;
+    }
+
+    int aStateIndex = stateIndex;
+    
+    [self connectSocket:socketFD address:address stateIndex:aStateIndex];
+    
+    if (alternateAddress)
+    {
+        dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(alternateAddressDelay * NSEC_PER_SEC)), socketQueue, ^{
+            [self connectSocket:alternateSocketFD address:alternateAddress stateIndex:aStateIndex];
+        });
+    }
+	
+	return YES;
+}
+
+- (BOOL)connectWithAddressUN:(NSData *)address error:(NSError **)errPtr
+{
+	LogTrace();
+	
+	NSAssert(dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey), @"Must be dispatched on socketQueue");
+	
+	// Create the socket
+	
+	int socketFD;
+	
+	LogVerbose(@"Creating unix domain socket");
+	
+	socketUN = socket(AF_UNIX, SOCK_STREAM, 0);
+	
+	socketFD = socketUN;
+	
+	if (socketFD == SOCKET_NULL)
+	{
+		if (errPtr)
+			*errPtr = [self errnoErrorWithReason:@"Error in socket() function"];
+		
+		return NO;
+	}
+	
+	// Bind the socket to the desired interface (if needed)
+	
+	LogVerbose(@"Binding socket...");
+	
+	int reuseOn = 1;
+	setsockopt(socketFD, SOL_SOCKET, SO_REUSEADDR, &reuseOn, sizeof(reuseOn));
+
+//	const struct sockaddr *interfaceAddr = (const struct sockaddr *)[address bytes];
+//	
+//	int result = bind(socketFD, interfaceAddr, (socklen_t)[address length]);
+//	if (result != 0)
+//	{
+//		if (errPtr)
+//			*errPtr = [self errnoErrorWithReason:@"Error in bind() function"];
+//		
+//		return NO;
+//	}
+	
+	// Prevent SIGPIPE signals
+	
+	int nosigpipe = 1;
+	setsockopt(socketFD, SOL_SOCKET, SO_NOSIGPIPE, &nosigpipe, sizeof(nosigpipe));
+	
+	// Start the connection process in a background queue
+	
+	int aStateIndex = stateIndex;
+	
+	dispatch_queue_t globalConcurrentQueue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
+	dispatch_async(globalConcurrentQueue, ^{
+		
+		const struct sockaddr *addr = (const struct sockaddr *)[address bytes];
+		int result = connect(socketFD, addr, addr->sa_len);
+		if (result == 0)
+		{
+            dispatch_async(self->socketQueue, ^{ @autoreleasepool {
+				
+				[self didConnect:aStateIndex];
+			}});
+		}
+		else
+		{
+			// TODO: Bad file descriptor
+			perror("connect");
+			NSError *error = [self errnoErrorWithReason:@"Error in connect() function"];
+			
+            dispatch_async(self->socketQueue, ^{ @autoreleasepool {
+				
+				[self didNotConnect:aStateIndex error:error];
+			}});
+		}
+	});
+	
+	LogVerbose(@"Connecting...");
+	
+	return YES;
+}
+
+- (void)didConnect:(int)aStateIndex
+{
+	LogTrace();
+	
+	NSAssert(dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey), @"Must be dispatched on socketQueue");
+	
+	
+	if (aStateIndex != stateIndex)
+	{
+		LogInfo(@"Ignoring didConnect, already disconnected");
+		
+		// The connect operation has been cancelled.
+		// That is, socket was disconnected, or connection has already timed out.
+		return;
+	}
+	
+	flags |= kConnected;
+	
+	[self endConnectTimeout];
+	
+	#if TARGET_OS_IPHONE
+	// The endConnectTimeout method executed above incremented the stateIndex.
+	aStateIndex = stateIndex;
+	#endif
+	
+	// Setup read/write streams (as workaround for specific shortcomings in the iOS platform)
+	// 
+	// Note:
+	// There may be configuration options that must be set by the delegate before opening the streams.
+	// The primary example is the kCFStreamNetworkServiceTypeVoIP flag, which only works on an unopened stream.
+	// 
+	// Thus we wait until after the socket:didConnectToHost:port: delegate method has completed.
+	// This gives the delegate time to properly configure the streams if needed.
+	
+	dispatch_block_t SetupStreamsPart1 = ^{
+		#if TARGET_OS_IPHONE
+		
+		if (![self createReadAndWriteStream])
+		{
+			[self closeWithError:[self otherError:@"Error creating CFStreams"]];
+			return;
+		}
+		
+		if (![self registerForStreamCallbacksIncludingReadWrite:NO])
+		{
+			[self closeWithError:[self otherError:@"Error in CFStreamSetClient"]];
+			return;
+		}
+		
+		#endif
+	};
+	dispatch_block_t SetupStreamsPart2 = ^{
+		#if TARGET_OS_IPHONE
+		
+        if (aStateIndex != self->stateIndex)
+		{
+			// The socket has been disconnected.
+			return;
+		}
+		
+		if (![self addStreamsToRunLoop])
+		{
+			[self closeWithError:[self otherError:@"Error in CFStreamScheduleWithRunLoop"]];
+			return;
+		}
+		
+		if (![self openStreams])
+		{
+			[self closeWithError:[self otherError:@"Error creating CFStreams"]];
+			return;
+		}
+		
+		#endif
+	};
+	
+	// Notify delegate
+	
+	NSString *host = [self connectedHost];
+	uint16_t port = [self connectedPort];
+	NSURL *url = [self connectedUrl];
+	
+	__strong id theDelegate = delegate;
+
+	if (delegateQueue && host != nil && [theDelegate respondsToSelector:@selector(socket:didConnectToHost:port:)])
+	{
+		SetupStreamsPart1();
+		
+		dispatch_async(delegateQueue, ^{ @autoreleasepool {
+			
+			[theDelegate socket:self didConnectToHost:host port:port];
+			
+            dispatch_async(self->socketQueue, ^{ @autoreleasepool {
+				
+				SetupStreamsPart2();
+			}});
+		}});
+	}
+	else if (delegateQueue && url != nil && [theDelegate respondsToSelector:@selector(socket:didConnectToUrl:)])
+	{
+		SetupStreamsPart1();
+		
+		dispatch_async(delegateQueue, ^{ @autoreleasepool {
+			
+			[theDelegate socket:self didConnectToUrl:url];
+			
+            dispatch_async(self->socketQueue, ^{ @autoreleasepool {
+				
+				SetupStreamsPart2();
+			}});
+		}});
+	}
+	else
+	{
+		SetupStreamsPart1();
+		SetupStreamsPart2();
+	}
+		
+	// Get the connected socket
+	
+	int socketFD = (socket4FD != SOCKET_NULL) ? socket4FD : (socket6FD != SOCKET_NULL) ? socket6FD : socketUN;
+	
+	// Enable non-blocking IO on the socket
+	
+	int result = fcntl(socketFD, F_SETFL, O_NONBLOCK);
+	if (result == -1)
+	{
+		NSString *errMsg = @"Error enabling non-blocking IO on socket (fcntl)";
+		[self closeWithError:[self otherError:errMsg]];
+		
+		return;
+	}
+	
+	// Setup our read/write sources
+	
+	[self setupReadAndWriteSourcesForNewlyConnectedSocket:socketFD];
+	
+	// Dequeue any pending read/write requests
+	
+	[self maybeDequeueRead];
+	[self maybeDequeueWrite];
+}
+
+- (void)didNotConnect:(int)aStateIndex error:(NSError *)error
+{
+	LogTrace();
+	
+	NSAssert(dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey), @"Must be dispatched on socketQueue");
+	
+	
+	if (aStateIndex != stateIndex)
+	{
+		LogInfo(@"Ignoring didNotConnect, already disconnected");
+		
+		// The connect operation has been cancelled.
+		// That is, socket was disconnected, or connection has already timed out.
+		return;
+	}
+	
+	[self closeWithError:error];
+}
+
+- (void)startConnectTimeout:(NSTimeInterval)timeout
+{
+	if (timeout >= 0.0)
+	{
+		connectTimer = dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER, 0, 0, socketQueue);
+		
+		__weak GCDAsyncSocket *weakSelf = self;
+		
+		dispatch_source_set_event_handler(connectTimer, ^{ @autoreleasepool {
+		#pragma clang diagnostic push
+		#pragma clang diagnostic warning "-Wimplicit-retain-self"
+		
+			__strong GCDAsyncSocket *strongSelf = weakSelf;
+			if (strongSelf == nil) return_from_block;
+			
+			[strongSelf doConnectTimeout];
+			
+		#pragma clang diagnostic pop
+		}});
+		
+		#if !OS_OBJECT_USE_OBJC
+		dispatch_source_t theConnectTimer = connectTimer;
+		dispatch_source_set_cancel_handler(connectTimer, ^{
+		#pragma clang diagnostic push
+		#pragma clang diagnostic warning "-Wimplicit-retain-self"
+			
+			LogVerbose(@"dispatch_release(connectTimer)");
+			dispatch_release(theConnectTimer);
+			
+		#pragma clang diagnostic pop
+		});
+		#endif
+		
+		dispatch_time_t tt = dispatch_time(DISPATCH_TIME_NOW, (int64_t)(timeout * NSEC_PER_SEC));
+		dispatch_source_set_timer(connectTimer, tt, DISPATCH_TIME_FOREVER, 0);
+		
+		dispatch_resume(connectTimer);
+	}
+}
+
+- (void)endConnectTimeout
+{
+	LogTrace();
+	
+	if (connectTimer)
+	{
+		dispatch_source_cancel(connectTimer);
+		connectTimer = NULL;
+	}
+	
+	// Increment stateIndex.
+	// This will prevent us from processing results from any related background asynchronous operations.
+	// 
+	// Note: This should be called from close method even if connectTimer is NULL.
+	// This is because one might disconnect a socket prior to a successful connection which had no timeout.
+	
+	stateIndex++;
+	
+	if (connectInterface4)
+	{
+		connectInterface4 = nil;
+	}
+	if (connectInterface6)
+	{
+		connectInterface6 = nil;
+	}
+}
+
+- (void)doConnectTimeout
+{
+	LogTrace();
+	
+	[self endConnectTimeout];
+	[self closeWithError:[self connectTimeoutError]];
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+#pragma mark Disconnecting
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+- (void)closeWithError:(NSError *)error
+{
+	LogTrace();
+	NSAssert(dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey), @"Must be dispatched on socketQueue");
+	
+	[self endConnectTimeout];
+	
+	if (currentRead != nil)  [self endCurrentRead];
+	if (currentWrite != nil) [self endCurrentWrite];
+	
+	[readQueue removeAllObjects];
+	[writeQueue removeAllObjects];
+	
+	[preBuffer reset];
+	
+	#if TARGET_OS_IPHONE
+	{
+		if (readStream || writeStream)
+		{
+			[self removeStreamsFromRunLoop];
+			
+			if (readStream)
+			{
+				CFReadStreamSetClient(readStream, kCFStreamEventNone, NULL, NULL);
+				CFReadStreamClose(readStream);
+				CFRelease(readStream);
+				readStream = NULL;
+			}
+			if (writeStream)
+			{
+				CFWriteStreamSetClient(writeStream, kCFStreamEventNone, NULL, NULL);
+				CFWriteStreamClose(writeStream);
+				CFRelease(writeStream);
+				writeStream = NULL;
+			}
+		}
+	}
+	#endif
+	
+	[sslPreBuffer reset];
+	sslErrCode = lastSSLHandshakeError = noErr;
+	
+	if (sslContext)
+	{
+		// Getting a linker error here about the SSLx() functions?
+		// You need to add the Security Framework to your application.
+		
+		SSLClose(sslContext);
+		
+		#if TARGET_OS_IPHONE || (__MAC_OS_X_VERSION_MIN_REQUIRED >= 1080)
+		CFRelease(sslContext);
+		#else
+		SSLDisposeContext(sslContext);
+		#endif
+		
+		sslContext = NULL;
+	}
+	
+	// For some crazy reason (in my opinion), cancelling a dispatch source doesn't
+	// invoke the cancel handler if the dispatch source is paused.
+	// So we have to unpause the source if needed.
+	// This allows the cancel handler to be run, which in turn releases the source and closes the socket.
+	
+	if (!accept4Source && !accept6Source && !acceptUNSource && !readSource && !writeSource)
+	{
+		LogVerbose(@"manually closing close");
+
+		if (socket4FD != SOCKET_NULL)
+		{
+			LogVerbose(@"close(socket4FD)");
+			close(socket4FD);
+			socket4FD = SOCKET_NULL;
+		}
+
+		if (socket6FD != SOCKET_NULL)
+		{
+			LogVerbose(@"close(socket6FD)");
+			close(socket6FD);
+			socket6FD = SOCKET_NULL;
+		}
+		
+		if (socketUN != SOCKET_NULL)
+		{
+			LogVerbose(@"close(socketUN)");
+			close(socketUN);
+			socketUN = SOCKET_NULL;
+			unlink(socketUrl.path.fileSystemRepresentation);
+			socketUrl = nil;
+		}
+	}
+	else
+	{
+		if (accept4Source)
+		{
+			LogVerbose(@"dispatch_source_cancel(accept4Source)");
+			dispatch_source_cancel(accept4Source);
+			
+			// We never suspend accept4Source
+			
+			accept4Source = NULL;
+		}
+		
+		if (accept6Source)
+		{
+			LogVerbose(@"dispatch_source_cancel(accept6Source)");
+			dispatch_source_cancel(accept6Source);
+			
+			// We never suspend accept6Source
+			
+			accept6Source = NULL;
+		}
+		
+		if (acceptUNSource)
+		{
+			LogVerbose(@"dispatch_source_cancel(acceptUNSource)");
+			dispatch_source_cancel(acceptUNSource);
+			
+			// We never suspend acceptUNSource
+			
+			acceptUNSource = NULL;
+		}
+	
+		if (readSource)
+		{
+			LogVerbose(@"dispatch_source_cancel(readSource)");
+			dispatch_source_cancel(readSource);
+			
+			[self resumeReadSource];
+			
+			readSource = NULL;
+		}
+		
+		if (writeSource)
+		{
+			LogVerbose(@"dispatch_source_cancel(writeSource)");
+			dispatch_source_cancel(writeSource);
+			
+			[self resumeWriteSource];
+			
+			writeSource = NULL;
+		}
+		
+		// The sockets will be closed by the cancel handlers of the corresponding source
+		
+		socket4FD = SOCKET_NULL;
+		socket6FD = SOCKET_NULL;
+		socketUN = SOCKET_NULL;
+	}
+	
+	// If the client has passed the connect/accept method, then the connection has at least begun.
+	// Notify delegate that it is now ending.
+	BOOL shouldCallDelegate = (flags & kSocketStarted) ? YES : NO;
+	BOOL isDeallocating = (flags & kDealloc) ? YES : NO;
+	
+	// Clear stored socket info and all flags (config remains as is)
+	socketFDBytesAvailable = 0;
+	flags = 0;
+	sslWriteCachedLength = 0;
+	
+	if (shouldCallDelegate)
+	{
+		__strong id theDelegate = delegate;
+		__strong id theSelf = isDeallocating ? nil : self;
+		
+		if (delegateQueue && [theDelegate respondsToSelector: @selector(socketDidDisconnect:withError:)])
+		{
+			dispatch_async(delegateQueue, ^{ @autoreleasepool {
+				
+				[theDelegate socketDidDisconnect:theSelf withError:error];
+			}});
+		}	
+	}
+}
+
+- (void)disconnect
+{
+	dispatch_block_t block = ^{ @autoreleasepool {
+		
+        if (self->flags & kSocketStarted)
+		{
+			[self closeWithError:nil];
+		}
+	}};
+	
+	// Synchronous disconnection, as documented in the header file
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_sync(socketQueue, block);
+}
+
+- (void)disconnectAfterReading
+{
+	dispatch_async(socketQueue, ^{ @autoreleasepool {
+		
+        if (self->flags & kSocketStarted)
+		{
+            self->flags |= (kForbidReadsWrites | kDisconnectAfterReads);
+			[self maybeClose];
+		}
+	}});
+}
+
+- (void)disconnectAfterWriting
+{
+	dispatch_async(socketQueue, ^{ @autoreleasepool {
+		
+        if (self->flags & kSocketStarted)
+		{
+            self->flags |= (kForbidReadsWrites | kDisconnectAfterWrites);
+			[self maybeClose];
+		}
+	}});
+}
+
+- (void)disconnectAfterReadingAndWriting
+{
+	dispatch_async(socketQueue, ^{ @autoreleasepool {
+		
+        if (self->flags & kSocketStarted)
+		{
+            self->flags |= (kForbidReadsWrites | kDisconnectAfterReads | kDisconnectAfterWrites);
+			[self maybeClose];
+		}
+	}});
+}
+
+/**
+ * Closes the socket if possible.
+ * That is, if all writes have completed, and we're set to disconnect after writing,
+ * or if all reads have completed, and we're set to disconnect after reading.
+**/
+- (void)maybeClose
+{
+	NSAssert(dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey), @"Must be dispatched on socketQueue");
+	
+	BOOL shouldClose = NO;
+	
+	if (flags & kDisconnectAfterReads)
+	{
+		if (([readQueue count] == 0) && (currentRead == nil))
+		{
+			if (flags & kDisconnectAfterWrites)
+			{
+				if (([writeQueue count] == 0) && (currentWrite == nil))
+				{
+					shouldClose = YES;
+				}
+			}
+			else
+			{
+				shouldClose = YES;
+			}
+		}
+	}
+	else if (flags & kDisconnectAfterWrites)
+	{
+		if (([writeQueue count] == 0) && (currentWrite == nil))
+		{
+			shouldClose = YES;
+		}
+	}
+	
+	if (shouldClose)
+	{
+		[self closeWithError:nil];
+	}
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+#pragma mark Errors
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+- (NSError *)badConfigError:(NSString *)errMsg
+{
+	NSDictionary *userInfo = [NSDictionary dictionaryWithObject:errMsg forKey:NSLocalizedDescriptionKey];
+	
+	return [NSError errorWithDomain:GCDAsyncSocketErrorDomain code:GCDAsyncSocketBadConfigError userInfo:userInfo];
+}
+
+- (NSError *)badParamError:(NSString *)errMsg
+{
+	NSDictionary *userInfo = [NSDictionary dictionaryWithObject:errMsg forKey:NSLocalizedDescriptionKey];
+	
+	return [NSError errorWithDomain:GCDAsyncSocketErrorDomain code:GCDAsyncSocketBadParamError userInfo:userInfo];
+}
+
++ (NSError *)gaiError:(int)gai_error
+{
+	NSString *errMsg = [NSString stringWithCString:gai_strerror(gai_error) encoding:NSASCIIStringEncoding];
+	NSDictionary *userInfo = [NSDictionary dictionaryWithObject:errMsg forKey:NSLocalizedDescriptionKey];
+	
+	return [NSError errorWithDomain:@"kCFStreamErrorDomainNetDB" code:gai_error userInfo:userInfo];
+}
+
+- (NSError *)errnoErrorWithReason:(NSString *)reason
+{
+	NSString *errMsg = [NSString stringWithUTF8String:strerror(errno)];
+	NSDictionary *userInfo = [NSDictionary dictionaryWithObjectsAndKeys:errMsg, NSLocalizedDescriptionKey,
+	                                                                    reason, NSLocalizedFailureReasonErrorKey, nil];
+	
+	return [NSError errorWithDomain:NSPOSIXErrorDomain code:errno userInfo:userInfo];
+}
+
+- (NSError *)errnoError
+{
+	NSString *errMsg = [NSString stringWithUTF8String:strerror(errno)];
+	NSDictionary *userInfo = [NSDictionary dictionaryWithObject:errMsg forKey:NSLocalizedDescriptionKey];
+	
+	return [NSError errorWithDomain:NSPOSIXErrorDomain code:errno userInfo:userInfo];
+}
+
+- (NSError *)sslError:(OSStatus)ssl_error
+{
+	NSString *msg = @"Error code definition can be found in Apple's SecureTransport.h";
+	NSDictionary *userInfo = [NSDictionary dictionaryWithObject:msg forKey:NSLocalizedRecoverySuggestionErrorKey];
+	
+	return [NSError errorWithDomain:@"kCFStreamErrorDomainSSL" code:ssl_error userInfo:userInfo];
+}
+
+- (NSError *)connectTimeoutError
+{
+	NSString *errMsg = NSLocalizedStringWithDefaultValue(@"GCDAsyncSocketConnectTimeoutError",
+	                                                     @"GCDAsyncSocket", [NSBundle mainBundle],
+	                                                     @"Attempt to connect to host timed out", nil);
+	
+	NSDictionary *userInfo = [NSDictionary dictionaryWithObject:errMsg forKey:NSLocalizedDescriptionKey];
+	
+	return [NSError errorWithDomain:GCDAsyncSocketErrorDomain code:GCDAsyncSocketConnectTimeoutError userInfo:userInfo];
+}
+
+/**
+ * Returns a standard AsyncSocket maxed out error.
+**/
+- (NSError *)readMaxedOutError
+{
+	NSString *errMsg = NSLocalizedStringWithDefaultValue(@"GCDAsyncSocketReadMaxedOutError",
+														 @"GCDAsyncSocket", [NSBundle mainBundle],
+														 @"Read operation reached set maximum length", nil);
+	
+	NSDictionary *info = [NSDictionary dictionaryWithObject:errMsg forKey:NSLocalizedDescriptionKey];
+	
+	return [NSError errorWithDomain:GCDAsyncSocketErrorDomain code:GCDAsyncSocketReadMaxedOutError userInfo:info];
+}
+
+/**
+ * Returns a standard AsyncSocket write timeout error.
+**/
+- (NSError *)readTimeoutError
+{
+	NSString *errMsg = NSLocalizedStringWithDefaultValue(@"GCDAsyncSocketReadTimeoutError",
+	                                                     @"GCDAsyncSocket", [NSBundle mainBundle],
+	                                                     @"Read operation timed out", nil);
+	
+	NSDictionary *userInfo = [NSDictionary dictionaryWithObject:errMsg forKey:NSLocalizedDescriptionKey];
+	
+	return [NSError errorWithDomain:GCDAsyncSocketErrorDomain code:GCDAsyncSocketReadTimeoutError userInfo:userInfo];
+}
+
+/**
+ * Returns a standard AsyncSocket write timeout error.
+**/
+- (NSError *)writeTimeoutError
+{
+	NSString *errMsg = NSLocalizedStringWithDefaultValue(@"GCDAsyncSocketWriteTimeoutError",
+	                                                     @"GCDAsyncSocket", [NSBundle mainBundle],
+	                                                     @"Write operation timed out", nil);
+	
+	NSDictionary *userInfo = [NSDictionary dictionaryWithObject:errMsg forKey:NSLocalizedDescriptionKey];
+	
+	return [NSError errorWithDomain:GCDAsyncSocketErrorDomain code:GCDAsyncSocketWriteTimeoutError userInfo:userInfo];
+}
+
+- (NSError *)connectionClosedError
+{
+	NSString *errMsg = NSLocalizedStringWithDefaultValue(@"GCDAsyncSocketClosedError",
+	                                                     @"GCDAsyncSocket", [NSBundle mainBundle],
+	                                                     @"Socket closed by remote peer", nil);
+	
+	NSDictionary *userInfo = [NSDictionary dictionaryWithObject:errMsg forKey:NSLocalizedDescriptionKey];
+	
+	return [NSError errorWithDomain:GCDAsyncSocketErrorDomain code:GCDAsyncSocketClosedError userInfo:userInfo];
+}
+
+- (NSError *)otherError:(NSString *)errMsg
+{
+	NSDictionary *userInfo = [NSDictionary dictionaryWithObject:errMsg forKey:NSLocalizedDescriptionKey];
+	
+	return [NSError errorWithDomain:GCDAsyncSocketErrorDomain code:GCDAsyncSocketOtherError userInfo:userInfo];
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+#pragma mark Diagnostics
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+- (BOOL)isDisconnected
+{
+	__block BOOL result = NO;
+	
+	dispatch_block_t block = ^{
+        result = (self->flags & kSocketStarted) ? NO : YES;
+	};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_sync(socketQueue, block);
+	
+	return result;
+}
+
+- (BOOL)isConnected
+{
+	__block BOOL result = NO;
+	
+	dispatch_block_t block = ^{
+        result = (self->flags & kConnected) ? YES : NO;
+	};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_sync(socketQueue, block);
+	
+	return result;
+}
+
+- (NSString *)connectedHost
+{
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+	{
+		if (socket4FD != SOCKET_NULL)
+			return [self connectedHostFromSocket4:socket4FD];
+		if (socket6FD != SOCKET_NULL)
+			return [self connectedHostFromSocket6:socket6FD];
+		
+		return nil;
+	}
+	else
+	{
+		__block NSString *result = nil;
+		
+		dispatch_sync(socketQueue, ^{ @autoreleasepool {
+			
+            if (self->socket4FD != SOCKET_NULL)
+                result = [self connectedHostFromSocket4:self->socket4FD];
+            else if (self->socket6FD != SOCKET_NULL)
+                result = [self connectedHostFromSocket6:self->socket6FD];
+		}});
+		
+		return result;
+	}
+}
+
+- (uint16_t)connectedPort
+{
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+	{
+		if (socket4FD != SOCKET_NULL)
+			return [self connectedPortFromSocket4:socket4FD];
+		if (socket6FD != SOCKET_NULL)
+			return [self connectedPortFromSocket6:socket6FD];
+		
+		return 0;
+	}
+	else
+	{
+		__block uint16_t result = 0;
+		
+		dispatch_sync(socketQueue, ^{
+			// No need for autorelease pool
+			
+            if (self->socket4FD != SOCKET_NULL)
+                result = [self connectedPortFromSocket4:self->socket4FD];
+            else if (self->socket6FD != SOCKET_NULL)
+                result = [self connectedPortFromSocket6:self->socket6FD];
+		});
+		
+		return result;
+	}
+}
+
+- (NSURL *)connectedUrl
+{
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+	{
+		if (socketUN != SOCKET_NULL)
+			return [self connectedUrlFromSocketUN:socketUN];
+		
+		return nil;
+	}
+	else
+	{
+		__block NSURL *result = nil;
+		
+		dispatch_sync(socketQueue, ^{ @autoreleasepool {
+			
+            if (self->socketUN != SOCKET_NULL)
+                result = [self connectedUrlFromSocketUN:self->socketUN];
+		}});
+		
+		return result;
+	}
+}
+
+- (NSString *)localHost
+{
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+	{
+		if (socket4FD != SOCKET_NULL)
+			return [self localHostFromSocket4:socket4FD];
+		if (socket6FD != SOCKET_NULL)
+			return [self localHostFromSocket6:socket6FD];
+		
+		return nil;
+	}
+	else
+	{
+		__block NSString *result = nil;
+		
+		dispatch_sync(socketQueue, ^{ @autoreleasepool {
+			
+            if (self->socket4FD != SOCKET_NULL)
+                result = [self localHostFromSocket4:self->socket4FD];
+            else if (self->socket6FD != SOCKET_NULL)
+                result = [self localHostFromSocket6:self->socket6FD];
+		}});
+		
+		return result;
+	}
+}
+
+- (uint16_t)localPort
+{
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+	{
+		if (socket4FD != SOCKET_NULL)
+			return [self localPortFromSocket4:socket4FD];
+		if (socket6FD != SOCKET_NULL)
+			return [self localPortFromSocket6:socket6FD];
+		
+		return 0;
+	}
+	else
+	{
+		__block uint16_t result = 0;
+		
+		dispatch_sync(socketQueue, ^{
+			// No need for autorelease pool
+			
+            if (self->socket4FD != SOCKET_NULL)
+                result = [self localPortFromSocket4:self->socket4FD];
+            else if (self->socket6FD != SOCKET_NULL)
+                result = [self localPortFromSocket6:self->socket6FD];
+		});
+		
+		return result;
+	}
+}
+
+- (NSString *)connectedHost4
+{
+	if (socket4FD != SOCKET_NULL)
+		return [self connectedHostFromSocket4:socket4FD];
+	
+	return nil;
+}
+
+- (NSString *)connectedHost6
+{
+	if (socket6FD != SOCKET_NULL)
+		return [self connectedHostFromSocket6:socket6FD];
+	
+	return nil;
+}
+
+- (uint16_t)connectedPort4
+{
+	if (socket4FD != SOCKET_NULL)
+		return [self connectedPortFromSocket4:socket4FD];
+	
+	return 0;
+}
+
+- (uint16_t)connectedPort6
+{
+	if (socket6FD != SOCKET_NULL)
+		return [self connectedPortFromSocket6:socket6FD];
+	
+	return 0;
+}
+
+- (NSString *)localHost4
+{
+	if (socket4FD != SOCKET_NULL)
+		return [self localHostFromSocket4:socket4FD];
+	
+	return nil;
+}
+
+- (NSString *)localHost6
+{
+	if (socket6FD != SOCKET_NULL)
+		return [self localHostFromSocket6:socket6FD];
+	
+	return nil;
+}
+
+- (uint16_t)localPort4
+{
+	if (socket4FD != SOCKET_NULL)
+		return [self localPortFromSocket4:socket4FD];
+	
+	return 0;
+}
+
+- (uint16_t)localPort6
+{
+	if (socket6FD != SOCKET_NULL)
+		return [self localPortFromSocket6:socket6FD];
+	
+	return 0;
+}
+
+- (NSString *)connectedHostFromSocket4:(int)socketFD
+{
+	struct sockaddr_in sockaddr4;
+	socklen_t sockaddr4len = sizeof(sockaddr4);
+	
+	if (getpeername(socketFD, (struct sockaddr *)&sockaddr4, &sockaddr4len) < 0)
+	{
+		return nil;
+	}
+	return [[self class] hostFromSockaddr4:&sockaddr4];
+}
+
+- (NSString *)connectedHostFromSocket6:(int)socketFD
+{
+	struct sockaddr_in6 sockaddr6;
+	socklen_t sockaddr6len = sizeof(sockaddr6);
+	
+	if (getpeername(socketFD, (struct sockaddr *)&sockaddr6, &sockaddr6len) < 0)
+	{
+		return nil;
+	}
+	return [[self class] hostFromSockaddr6:&sockaddr6];
+}
+
+- (uint16_t)connectedPortFromSocket4:(int)socketFD
+{
+	struct sockaddr_in sockaddr4;
+	socklen_t sockaddr4len = sizeof(sockaddr4);
+	
+	if (getpeername(socketFD, (struct sockaddr *)&sockaddr4, &sockaddr4len) < 0)
+	{
+		return 0;
+	}
+	return [[self class] portFromSockaddr4:&sockaddr4];
+}
+
+- (uint16_t)connectedPortFromSocket6:(int)socketFD
+{
+	struct sockaddr_in6 sockaddr6;
+	socklen_t sockaddr6len = sizeof(sockaddr6);
+	
+	if (getpeername(socketFD, (struct sockaddr *)&sockaddr6, &sockaddr6len) < 0)
+	{
+		return 0;
+	}
+	return [[self class] portFromSockaddr6:&sockaddr6];
+}
+
+- (NSURL *)connectedUrlFromSocketUN:(int)socketFD
+{
+	struct sockaddr_un sockaddr;
+	socklen_t sockaddrlen = sizeof(sockaddr);
+	
+	if (getpeername(socketFD, (struct sockaddr *)&sockaddr, &sockaddrlen) < 0)
+	{
+		return 0;
+	}
+	return [[self class] urlFromSockaddrUN:&sockaddr];
+}
+
+- (NSString *)localHostFromSocket4:(int)socketFD
+{
+	struct sockaddr_in sockaddr4;
+	socklen_t sockaddr4len = sizeof(sockaddr4);
+	
+	if (getsockname(socketFD, (struct sockaddr *)&sockaddr4, &sockaddr4len) < 0)
+	{
+		return nil;
+	}
+	return [[self class] hostFromSockaddr4:&sockaddr4];
+}
+
+- (NSString *)localHostFromSocket6:(int)socketFD
+{
+	struct sockaddr_in6 sockaddr6;
+	socklen_t sockaddr6len = sizeof(sockaddr6);
+	
+	if (getsockname(socketFD, (struct sockaddr *)&sockaddr6, &sockaddr6len) < 0)
+	{
+		return nil;
+	}
+	return [[self class] hostFromSockaddr6:&sockaddr6];
+}
+
+- (uint16_t)localPortFromSocket4:(int)socketFD
+{
+	struct sockaddr_in sockaddr4;
+	socklen_t sockaddr4len = sizeof(sockaddr4);
+	
+	if (getsockname(socketFD, (struct sockaddr *)&sockaddr4, &sockaddr4len) < 0)
+	{
+		return 0;
+	}
+	return [[self class] portFromSockaddr4:&sockaddr4];
+}
+
+- (uint16_t)localPortFromSocket6:(int)socketFD
+{
+	struct sockaddr_in6 sockaddr6;
+	socklen_t sockaddr6len = sizeof(sockaddr6);
+	
+	if (getsockname(socketFD, (struct sockaddr *)&sockaddr6, &sockaddr6len) < 0)
+	{
+		return 0;
+	}
+	return [[self class] portFromSockaddr6:&sockaddr6];
+}
+
+- (NSData *)connectedAddress
+{
+	__block NSData *result = nil;
+	
+	dispatch_block_t block = ^{
+        if (self->socket4FD != SOCKET_NULL)
+		{
+			struct sockaddr_in sockaddr4;
+			socklen_t sockaddr4len = sizeof(sockaddr4);
+			
+            if (getpeername(self->socket4FD, (struct sockaddr *)&sockaddr4, &sockaddr4len) == 0)
+			{
+				result = [[NSData alloc] initWithBytes:&sockaddr4 length:sockaddr4len];
+			}
+		}
+		
+        if (self->socket6FD != SOCKET_NULL)
+		{
+			struct sockaddr_in6 sockaddr6;
+			socklen_t sockaddr6len = sizeof(sockaddr6);
+			
+            if (getpeername(self->socket6FD, (struct sockaddr *)&sockaddr6, &sockaddr6len) == 0)
+			{
+				result = [[NSData alloc] initWithBytes:&sockaddr6 length:sockaddr6len];
+			}
+		}
+	};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_sync(socketQueue, block);
+	
+	return result;
+}
+
+- (NSData *)localAddress
+{
+	__block NSData *result = nil;
+	
+	dispatch_block_t block = ^{
+        if (self->socket4FD != SOCKET_NULL)
+		{
+			struct sockaddr_in sockaddr4;
+			socklen_t sockaddr4len = sizeof(sockaddr4);
+			
+            if (getsockname(self->socket4FD, (struct sockaddr *)&sockaddr4, &sockaddr4len) == 0)
+			{
+				result = [[NSData alloc] initWithBytes:&sockaddr4 length:sockaddr4len];
+			}
+		}
+		
+        if (self->socket6FD != SOCKET_NULL)
+		{
+			struct sockaddr_in6 sockaddr6;
+			socklen_t sockaddr6len = sizeof(sockaddr6);
+			
+            if (getsockname(self->socket6FD, (struct sockaddr *)&sockaddr6, &sockaddr6len) == 0)
+			{
+				result = [[NSData alloc] initWithBytes:&sockaddr6 length:sockaddr6len];
+			}
+		}
+	};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_sync(socketQueue, block);
+	
+	return result;
+}
+
+- (BOOL)isIPv4
+{
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+	{
+		return (socket4FD != SOCKET_NULL);
+	}
+	else
+	{
+		__block BOOL result = NO;
+		
+		dispatch_sync(socketQueue, ^{
+            result = (self->socket4FD != SOCKET_NULL);
+		});
+		
+		return result;
+	}
+}
+
+- (BOOL)isIPv6
+{
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+	{
+		return (socket6FD != SOCKET_NULL);
+	}
+	else
+	{
+		__block BOOL result = NO;
+		
+		dispatch_sync(socketQueue, ^{
+            result = (self->socket6FD != SOCKET_NULL);
+		});
+		
+		return result;
+	}
+}
+
+- (BOOL)isSecure
+{
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+	{
+		return (flags & kSocketSecure) ? YES : NO;
+	}
+	else
+	{
+		__block BOOL result;
+		
+		dispatch_sync(socketQueue, ^{
+            result = (self->flags & kSocketSecure) ? YES : NO;
+		});
+		
+		return result;
+	}
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+#pragma mark Utilities
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+/**
+ * Finds the address of an interface description.
+ * An inteface description may be an interface name (en0, en1, lo0) or corresponding IP (192.168.4.34).
+ * 
+ * The interface description may optionally contain a port number at the end, separated by a colon.
+ * If a non-zero port parameter is provided, any port number in the interface description is ignored.
+ * 
+ * The returned value is a 'struct sockaddr' wrapped in an NSMutableData object.
+**/
+- (void)getInterfaceAddress4:(NSMutableData **)interfaceAddr4Ptr
+                    address6:(NSMutableData **)interfaceAddr6Ptr
+             fromDescription:(NSString *)interfaceDescription
+                        port:(uint16_t)port
+{
+	NSMutableData *addr4 = nil;
+	NSMutableData *addr6 = nil;
+	
+	NSString *interface = nil;
+	
+	NSArray *components = [interfaceDescription componentsSeparatedByString:@":"];
+	if ([components count] > 0)
+	{
+		NSString *temp = [components objectAtIndex:0];
+		if ([temp length] > 0)
+		{
+			interface = temp;
+		}
+	}
+	if ([components count] > 1 && port == 0)
+	{
+		long portL = strtol([[components objectAtIndex:1] UTF8String], NULL, 10);
+		
+		if (portL > 0 && portL <= UINT16_MAX)
+		{
+			port = (uint16_t)portL;
+		}
+	}
+	
+	if (interface == nil)
+	{
+		// ANY address
+		
+		struct sockaddr_in sockaddr4;
+		memset(&sockaddr4, 0, sizeof(sockaddr4));
+		
+		sockaddr4.sin_len         = sizeof(sockaddr4);
+		sockaddr4.sin_family      = AF_INET;
+		sockaddr4.sin_port        = htons(port);
+		sockaddr4.sin_addr.s_addr = htonl(INADDR_ANY);
+		
+		struct sockaddr_in6 sockaddr6;
+		memset(&sockaddr6, 0, sizeof(sockaddr6));
+		
+		sockaddr6.sin6_len       = sizeof(sockaddr6);
+		sockaddr6.sin6_family    = AF_INET6;
+		sockaddr6.sin6_port      = htons(port);
+		sockaddr6.sin6_addr      = in6addr_any;
+		
+		addr4 = [NSMutableData dataWithBytes:&sockaddr4 length:sizeof(sockaddr4)];
+		addr6 = [NSMutableData dataWithBytes:&sockaddr6 length:sizeof(sockaddr6)];
+	}
+	else if ([interface isEqualToString:@"localhost"] || [interface isEqualToString:@"loopback"])
+	{
+		// LOOPBACK address
+		
+		struct sockaddr_in sockaddr4;
+		memset(&sockaddr4, 0, sizeof(sockaddr4));
+		
+		sockaddr4.sin_len         = sizeof(sockaddr4);
+		sockaddr4.sin_family      = AF_INET;
+		sockaddr4.sin_port        = htons(port);
+		sockaddr4.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
+		
+		struct sockaddr_in6 sockaddr6;
+		memset(&sockaddr6, 0, sizeof(sockaddr6));
+		
+		sockaddr6.sin6_len       = sizeof(sockaddr6);
+		sockaddr6.sin6_family    = AF_INET6;
+		sockaddr6.sin6_port      = htons(port);
+		sockaddr6.sin6_addr      = in6addr_loopback;
+		
+		addr4 = [NSMutableData dataWithBytes:&sockaddr4 length:sizeof(sockaddr4)];
+		addr6 = [NSMutableData dataWithBytes:&sockaddr6 length:sizeof(sockaddr6)];
+	}
+	else
+	{
+		const char *iface = [interface UTF8String];
+		
+		struct ifaddrs *addrs;
+		const struct ifaddrs *cursor;
+		
+		if ((getifaddrs(&addrs) == 0))
+		{
+			cursor = addrs;
+			while (cursor != NULL)
+			{
+				if ((addr4 == nil) && (cursor->ifa_addr->sa_family == AF_INET))
+				{
+					// IPv4
+					
+					struct sockaddr_in nativeAddr4;
+					memcpy(&nativeAddr4, cursor->ifa_addr, sizeof(nativeAddr4));
+					
+					if (strcmp(cursor->ifa_name, iface) == 0)
+					{
+						// Name match
+						
+						nativeAddr4.sin_port = htons(port);
+						
+						addr4 = [NSMutableData dataWithBytes:&nativeAddr4 length:sizeof(nativeAddr4)];
+					}
+					else
+					{
+						char ip[INET_ADDRSTRLEN];
+						
+						const char *conversion = inet_ntop(AF_INET, &nativeAddr4.sin_addr, ip, sizeof(ip));
+						
+						if ((conversion != NULL) && (strcmp(ip, iface) == 0))
+						{
+							// IP match
+							
+							nativeAddr4.sin_port = htons(port);
+							
+							addr4 = [NSMutableData dataWithBytes:&nativeAddr4 length:sizeof(nativeAddr4)];
+						}
+					}
+				}
+				else if ((addr6 == nil) && (cursor->ifa_addr->sa_family == AF_INET6))
+				{
+					// IPv6
+					
+					struct sockaddr_in6 nativeAddr6;
+					memcpy(&nativeAddr6, cursor->ifa_addr, sizeof(nativeAddr6));
+					
+					if (strcmp(cursor->ifa_name, iface) == 0)
+					{
+						// Name match
+						
+						nativeAddr6.sin6_port = htons(port);
+						
+						addr6 = [NSMutableData dataWithBytes:&nativeAddr6 length:sizeof(nativeAddr6)];
+					}
+					else
+					{
+						char ip[INET6_ADDRSTRLEN];
+						
+						const char *conversion = inet_ntop(AF_INET6, &nativeAddr6.sin6_addr, ip, sizeof(ip));
+						
+						if ((conversion != NULL) && (strcmp(ip, iface) == 0))
+						{
+							// IP match
+							
+							nativeAddr6.sin6_port = htons(port);
+							
+							addr6 = [NSMutableData dataWithBytes:&nativeAddr6 length:sizeof(nativeAddr6)];
+						}
+					}
+				}
+				
+				cursor = cursor->ifa_next;
+			}
+			
+			freeifaddrs(addrs);
+		}
+	}
+	
+	if (interfaceAddr4Ptr) *interfaceAddr4Ptr = addr4;
+	if (interfaceAddr6Ptr) *interfaceAddr6Ptr = addr6;
+}
+
+- (NSData *)getInterfaceAddressFromUrl:(NSURL *)url;
+{
+	NSString *path = url.path;
+	if (path.length == 0) {
+		return nil;
+	}
+	
+    struct sockaddr_un nativeAddr;
+    nativeAddr.sun_family = AF_UNIX;
+    strlcpy(nativeAddr.sun_path, path.fileSystemRepresentation, sizeof(nativeAddr.sun_path));
+    nativeAddr.sun_len = (unsigned char)SUN_LEN(&nativeAddr);
+    NSData *interface = [NSData dataWithBytes:&nativeAddr length:sizeof(struct sockaddr_un)];
+	
+	return interface;
+}
+
+- (void)setupReadAndWriteSourcesForNewlyConnectedSocket:(int)socketFD
+{
+	readSource = dispatch_source_create(DISPATCH_SOURCE_TYPE_READ, socketFD, 0, socketQueue);
+	writeSource = dispatch_source_create(DISPATCH_SOURCE_TYPE_WRITE, socketFD, 0, socketQueue);
+	
+	// Setup event handlers
+	
+	__weak GCDAsyncSocket *weakSelf = self;
+	
+	dispatch_source_set_event_handler(readSource, ^{ @autoreleasepool {
+	#pragma clang diagnostic push
+	#pragma clang diagnostic warning "-Wimplicit-retain-self"
+		
+		__strong GCDAsyncSocket *strongSelf = weakSelf;
+		if (strongSelf == nil) return_from_block;
+		
+		LogVerbose(@"readEventBlock");
+		
+		strongSelf->socketFDBytesAvailable = dispatch_source_get_data(strongSelf->readSource);
+		LogVerbose(@"socketFDBytesAvailable: %lu", strongSelf->socketFDBytesAvailable);
+		
+		if (strongSelf->socketFDBytesAvailable > 0)
+			[strongSelf doReadData];
+		else
+			[strongSelf doReadEOF];
+		
+	#pragma clang diagnostic pop
+	}});
+	
+	dispatch_source_set_event_handler(writeSource, ^{ @autoreleasepool {
+	#pragma clang diagnostic push
+	#pragma clang diagnostic warning "-Wimplicit-retain-self"
+		
+		__strong GCDAsyncSocket *strongSelf = weakSelf;
+		if (strongSelf == nil) return_from_block;
+		
+		LogVerbose(@"writeEventBlock");
+		
+		strongSelf->flags |= kSocketCanAcceptBytes;
+		[strongSelf doWriteData];
+		
+	#pragma clang diagnostic pop
+	}});
+	
+	// Setup cancel handlers
+	
+	__block int socketFDRefCount = 2;
+	
+	#if !OS_OBJECT_USE_OBJC
+	dispatch_source_t theReadSource = readSource;
+	dispatch_source_t theWriteSource = writeSource;
+	#endif
+	
+	dispatch_source_set_cancel_handler(readSource, ^{
+	#pragma clang diagnostic push
+	#pragma clang diagnostic warning "-Wimplicit-retain-self"
+		
+		LogVerbose(@"readCancelBlock");
+		
+		#if !OS_OBJECT_USE_OBJC
+		LogVerbose(@"dispatch_release(readSource)");
+		dispatch_release(theReadSource);
+		#endif
+		
+		if (--socketFDRefCount == 0)
+		{
+			LogVerbose(@"close(socketFD)");
+			close(socketFD);
+		}
+		
+	#pragma clang diagnostic pop
+	});
+	
+	dispatch_source_set_cancel_handler(writeSource, ^{
+	#pragma clang diagnostic push
+	#pragma clang diagnostic warning "-Wimplicit-retain-self"
+		
+		LogVerbose(@"writeCancelBlock");
+		
+		#if !OS_OBJECT_USE_OBJC
+		LogVerbose(@"dispatch_release(writeSource)");
+		dispatch_release(theWriteSource);
+		#endif
+		
+		if (--socketFDRefCount == 0)
+		{
+			LogVerbose(@"close(socketFD)");
+			close(socketFD);
+		}
+		
+	#pragma clang diagnostic pop
+	});
+	
+	// We will not be able to read until data arrives.
+	// But we should be able to write immediately.
+	
+	socketFDBytesAvailable = 0;
+	flags &= ~kReadSourceSuspended;
+	
+	LogVerbose(@"dispatch_resume(readSource)");
+	dispatch_resume(readSource);
+	
+	flags |= kSocketCanAcceptBytes;
+	flags |= kWriteSourceSuspended;
+}
+
+- (BOOL)usingCFStreamForTLS
+{
+	#if TARGET_OS_IPHONE
+	
+	if ((flags & kSocketSecure) && (flags & kUsingCFStreamForTLS))
+	{
+		// The startTLS method was given the GCDAsyncSocketUseCFStreamForTLS flag.
+		
+		return YES;
+	}
+	
+	#endif
+	
+	return NO;
+}
+
+- (BOOL)usingSecureTransportForTLS
+{
+	// Invoking this method is equivalent to ![self usingCFStreamForTLS] (just more readable)
+	
+	#if TARGET_OS_IPHONE
+	
+	if ((flags & kSocketSecure) && (flags & kUsingCFStreamForTLS))
+	{
+		// The startTLS method was given the GCDAsyncSocketUseCFStreamForTLS flag.
+		
+		return NO;
+	}
+	
+	#endif
+	
+	return YES;
+}
+
+- (void)suspendReadSource
+{
+	if (!(flags & kReadSourceSuspended))
+	{
+		LogVerbose(@"dispatch_suspend(readSource)");
+		
+		dispatch_suspend(readSource);
+		flags |= kReadSourceSuspended;
+	}
+}
+
+- (void)resumeReadSource
+{
+	if (flags & kReadSourceSuspended)
+	{
+		LogVerbose(@"dispatch_resume(readSource)");
+		
+		dispatch_resume(readSource);
+		flags &= ~kReadSourceSuspended;
+	}
+}
+
+- (void)suspendWriteSource
+{
+	if (!(flags & kWriteSourceSuspended))
+	{
+		LogVerbose(@"dispatch_suspend(writeSource)");
+		
+		dispatch_suspend(writeSource);
+		flags |= kWriteSourceSuspended;
+	}
+}
+
+- (void)resumeWriteSource
+{
+	if (flags & kWriteSourceSuspended)
+	{
+		LogVerbose(@"dispatch_resume(writeSource)");
+		
+		dispatch_resume(writeSource);
+		flags &= ~kWriteSourceSuspended;
+	}
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+#pragma mark Reading
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+- (void)readDataWithTimeout:(NSTimeInterval)timeout tag:(long)tag
+{
+	[self readDataWithTimeout:timeout buffer:nil bufferOffset:0 maxLength:0 tag:tag];
+}
+
+- (void)readDataWithTimeout:(NSTimeInterval)timeout
+                     buffer:(NSMutableData *)buffer
+               bufferOffset:(NSUInteger)offset
+                        tag:(long)tag
+{
+	[self readDataWithTimeout:timeout buffer:buffer bufferOffset:offset maxLength:0 tag:tag];
+}
+
+- (void)readDataWithTimeout:(NSTimeInterval)timeout
+                     buffer:(NSMutableData *)buffer
+               bufferOffset:(NSUInteger)offset
+                  maxLength:(NSUInteger)length
+                        tag:(long)tag
+{
+	if (offset > [buffer length]) {
+		LogWarn(@"Cannot read: offset > [buffer length]");
+		return;
+	}
+	
+	GCDAsyncReadPacket *packet = [[GCDAsyncReadPacket alloc] initWithData:buffer
+	                                                          startOffset:offset
+	                                                            maxLength:length
+	                                                              timeout:timeout
+	                                                           readLength:0
+	                                                           terminator:nil
+	                                                                  tag:tag];
+	
+	dispatch_async(socketQueue, ^{ @autoreleasepool {
+		
+		LogTrace();
+		
+        if ((self->flags & kSocketStarted) && !(self->flags & kForbidReadsWrites))
+		{
+            [self->readQueue addObject:packet];
+			[self maybeDequeueRead];
+		}
+	}});
+	
+	// Do not rely on the block being run in order to release the packet,
+	// as the queue might get released without the block completing.
+}
+
+- (void)readDataToLength:(NSUInteger)length withTimeout:(NSTimeInterval)timeout tag:(long)tag
+{
+	[self readDataToLength:length withTimeout:timeout buffer:nil bufferOffset:0 tag:tag];
+}
+
+- (void)readDataToLength:(NSUInteger)length
+             withTimeout:(NSTimeInterval)timeout
+                  buffer:(NSMutableData *)buffer
+            bufferOffset:(NSUInteger)offset
+                     tag:(long)tag
+{
+	if (length == 0) {
+		LogWarn(@"Cannot read: length == 0");
+		return;
+	}
+	if (offset > [buffer length]) {
+		LogWarn(@"Cannot read: offset > [buffer length]");
+		return;
+	}
+	
+	GCDAsyncReadPacket *packet = [[GCDAsyncReadPacket alloc] initWithData:buffer
+	                                                          startOffset:offset
+	                                                            maxLength:0
+	                                                              timeout:timeout
+	                                                           readLength:length
+	                                                           terminator:nil
+	                                                                  tag:tag];
+	
+	dispatch_async(socketQueue, ^{ @autoreleasepool {
+		
+		LogTrace();
+		
+        if ((self->flags & kSocketStarted) && !(self->flags & kForbidReadsWrites))
+		{
+            [self->readQueue addObject:packet];
+			[self maybeDequeueRead];
+		}
+	}});
+	
+	// Do not rely on the block being run in order to release the packet,
+	// as the queue might get released without the block completing.
+}
+
+- (void)readDataToData:(NSData *)data withTimeout:(NSTimeInterval)timeout tag:(long)tag
+{
+	[self readDataToData:data withTimeout:timeout buffer:nil bufferOffset:0 maxLength:0 tag:tag];
+}
+
+- (void)readDataToData:(NSData *)data
+           withTimeout:(NSTimeInterval)timeout
+                buffer:(NSMutableData *)buffer
+          bufferOffset:(NSUInteger)offset
+                   tag:(long)tag
+{
+	[self readDataToData:data withTimeout:timeout buffer:buffer bufferOffset:offset maxLength:0 tag:tag];
+}
+
+- (void)readDataToData:(NSData *)data withTimeout:(NSTimeInterval)timeout maxLength:(NSUInteger)length tag:(long)tag
+{
+	[self readDataToData:data withTimeout:timeout buffer:nil bufferOffset:0 maxLength:length tag:tag];
+}
+
+- (void)readDataToData:(NSData *)data
+           withTimeout:(NSTimeInterval)timeout
+                buffer:(NSMutableData *)buffer
+          bufferOffset:(NSUInteger)offset
+             maxLength:(NSUInteger)maxLength
+                   tag:(long)tag
+{
+	if ([data length] == 0) {
+		LogWarn(@"Cannot read: [data length] == 0");
+		return;
+	}
+	if (offset > [buffer length]) {
+		LogWarn(@"Cannot read: offset > [buffer length]");
+		return;
+	}
+	if (maxLength > 0 && maxLength < [data length]) {
+		LogWarn(@"Cannot read: maxLength > 0 && maxLength < [data length]");
+		return;
+	}
+	
+	GCDAsyncReadPacket *packet = [[GCDAsyncReadPacket alloc] initWithData:buffer
+	                                                          startOffset:offset
+	                                                            maxLength:maxLength
+	                                                              timeout:timeout
+	                                                           readLength:0
+	                                                           terminator:data
+	                                                                  tag:tag];
+	
+	dispatch_async(socketQueue, ^{ @autoreleasepool {
+		
+		LogTrace();
+		
+        if ((self->flags & kSocketStarted) && !(self->flags & kForbidReadsWrites))
+		{
+            [self->readQueue addObject:packet];
+			[self maybeDequeueRead];
+		}
+	}});
+	
+	// Do not rely on the block being run in order to release the packet,
+	// as the queue might get released without the block completing.
+}
+
+- (float)progressOfReadReturningTag:(long *)tagPtr bytesDone:(NSUInteger *)donePtr total:(NSUInteger *)totalPtr
+{
+	__block float result = 0.0F;
+	
+	dispatch_block_t block = ^{
+		
+        if (!self->currentRead || ![self->currentRead isKindOfClass:[GCDAsyncReadPacket class]])
+		{
+			// We're not reading anything right now.
+			
+			if (tagPtr != NULL)   *tagPtr = 0;
+			if (donePtr != NULL)  *donePtr = 0;
+			if (totalPtr != NULL) *totalPtr = 0;
+			
+			result = NAN;
+		}
+		else
+		{
+			// It's only possible to know the progress of our read if we're reading to a certain length.
+			// If we're reading to data, we of course have no idea when the data will arrive.
+			// If we're reading to timeout, then we have no idea when the next chunk of data will arrive.
+			
+            NSUInteger done = self->currentRead->bytesDone;
+            NSUInteger total = self->currentRead->readLength;
+			
+            if (tagPtr != NULL)   *tagPtr = self->currentRead->tag;
+			if (donePtr != NULL)  *donePtr = done;
+			if (totalPtr != NULL) *totalPtr = total;
+			
+			if (total > 0)
+				result = (float)done / (float)total;
+			else
+				result = 1.0F;
+		}
+	};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_sync(socketQueue, block);
+	
+	return result;
+}
+
+/**
+ * This method starts a new read, if needed.
+ * 
+ * It is called when:
+ * - a user requests a read
+ * - after a read request has finished (to handle the next request)
+ * - immediately after the socket opens to handle any pending requests
+ * 
+ * This method also handles auto-disconnect post read/write completion.
+**/
+- (void)maybeDequeueRead
+{
+	LogTrace();
+	NSAssert(dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey), @"Must be dispatched on socketQueue");
+	
+	// If we're not currently processing a read AND we have an available read stream
+	if ((currentRead == nil) && (flags & kConnected))
+	{
+		if ([readQueue count] > 0)
+		{
+			// Dequeue the next object in the write queue
+			currentRead = [readQueue objectAtIndex:0];
+			[readQueue removeObjectAtIndex:0];
+			
+			
+			if ([currentRead isKindOfClass:[GCDAsyncSpecialPacket class]])
+			{
+				LogVerbose(@"Dequeued GCDAsyncSpecialPacket");
+				
+				// Attempt to start TLS
+				flags |= kStartingReadTLS;
+				
+				// This method won't do anything unless both kStartingReadTLS and kStartingWriteTLS are set
+				[self maybeStartTLS];
+			}
+			else
+			{
+				LogVerbose(@"Dequeued GCDAsyncReadPacket");
+				
+				// Setup read timer (if needed)
+				[self setupReadTimerWithTimeout:currentRead->timeout];
+				
+				// Immediately read, if possible
+				[self doReadData];
+			}
+		}
+		else if (flags & kDisconnectAfterReads)
+		{
+			if (flags & kDisconnectAfterWrites)
+			{
+				if (([writeQueue count] == 0) && (currentWrite == nil))
+				{
+					[self closeWithError:nil];
+				}
+			}
+			else
+			{
+				[self closeWithError:nil];
+			}
+		}
+		else if (flags & kSocketSecure)
+		{
+			[self flushSSLBuffers];
+			
+			// Edge case:
+			// 
+			// We just drained all data from the ssl buffers,
+			// and all known data from the socket (socketFDBytesAvailable).
+			// 
+			// If we didn't get any data from this process,
+			// then we may have reached the end of the TCP stream.
+			// 
+			// Be sure callbacks are enabled so we're notified about a disconnection.
+			
+			if ([preBuffer availableBytes] == 0)
+			{
+				if ([self usingCFStreamForTLS]) {
+					// Callbacks never disabled
+				}
+				else {
+					[self resumeReadSource];
+				}
+			}
+		}
+	}
+}
+
+- (void)flushSSLBuffers
+{
+	LogTrace();
+	
+	NSAssert((flags & kSocketSecure), @"Cannot flush ssl buffers on non-secure socket");
+	
+	if ([preBuffer availableBytes] > 0)
+	{
+		// Only flush the ssl buffers if the prebuffer is empty.
+		// This is to avoid growing the prebuffer inifinitely large.
+		
+		return;
+	}
+	
+	#if TARGET_OS_IPHONE
+	
+	if ([self usingCFStreamForTLS])
+	{
+		if ((flags & kSecureSocketHasBytesAvailable) && CFReadStreamHasBytesAvailable(readStream))
+		{
+			LogVerbose(@"%@ - Flushing ssl buffers into prebuffer...", THIS_METHOD);
+			
+			CFIndex defaultBytesToRead = (1024 * 4);
+			
+			[preBuffer ensureCapacityForWrite:defaultBytesToRead];
+			
+			uint8_t *buffer = [preBuffer writeBuffer];
+			
+			CFIndex result = CFReadStreamRead(readStream, buffer, defaultBytesToRead);
+			LogVerbose(@"%@ - CFReadStreamRead(): result = %i", THIS_METHOD, (int)result);
+			
+			if (result > 0)
+			{
+				[preBuffer didWrite:result];
+			}
+			
+			flags &= ~kSecureSocketHasBytesAvailable;
+		}
+		
+		return;
+	}
+	
+	#endif
+	
+	__block NSUInteger estimatedBytesAvailable = 0;
+	
+	dispatch_block_t updateEstimatedBytesAvailable = ^{
+		
+		// Figure out if there is any data available to be read
+		// 
+		// socketFDBytesAvailable        <- Number of encrypted bytes we haven't read from the bsd socket
+		// [sslPreBuffer availableBytes] <- Number of encrypted bytes we've buffered from bsd socket
+		// sslInternalBufSize            <- Number of decrypted bytes SecureTransport has buffered
+		// 
+		// We call the variable "estimated" because we don't know how many decrypted bytes we'll get
+		// from the encrypted bytes in the sslPreBuffer.
+		// However, we do know this is an upper bound on the estimation.
+		
+        estimatedBytesAvailable = self->socketFDBytesAvailable + [self->sslPreBuffer availableBytes];
+		
+		size_t sslInternalBufSize = 0;
+        SSLGetBufferedReadSize(self->sslContext, &sslInternalBufSize);
+		
+		estimatedBytesAvailable += sslInternalBufSize;
+	};
+	
+	updateEstimatedBytesAvailable();
+	
+	if (estimatedBytesAvailable > 0)
+	{
+		LogVerbose(@"%@ - Flushing ssl buffers into prebuffer...", THIS_METHOD);
+		
+		BOOL done = NO;
+		do
+		{
+			LogVerbose(@"%@ - estimatedBytesAvailable = %lu", THIS_METHOD, (unsigned long)estimatedBytesAvailable);
+			
+			// Make sure there's enough room in the prebuffer
+			
+			[preBuffer ensureCapacityForWrite:estimatedBytesAvailable];
+			
+			// Read data into prebuffer
+			
+			uint8_t *buffer = [preBuffer writeBuffer];
+			size_t bytesRead = 0;
+			
+			OSStatus result = SSLRead(sslContext, buffer, (size_t)estimatedBytesAvailable, &bytesRead);
+			LogVerbose(@"%@ - read from secure socket = %u", THIS_METHOD, (unsigned)bytesRead);
+			
+			if (bytesRead > 0)
+			{
+				[preBuffer didWrite:bytesRead];
+			}
+			
+			LogVerbose(@"%@ - prebuffer.length = %zu", THIS_METHOD, [preBuffer availableBytes]);
+			
+			if (result != noErr)
+			{
+				done = YES;
+			}
+			else
+			{
+				updateEstimatedBytesAvailable();
+			}
+			
+		} while (!done && estimatedBytesAvailable > 0);
+	}
+}
+
+- (void)doReadData
+{
+	LogTrace();
+	
+	// This method is called on the socketQueue.
+	// It might be called directly, or via the readSource when data is available to be read.
+	
+	if ((currentRead == nil) || (flags & kReadsPaused))
+	{
+		LogVerbose(@"No currentRead or kReadsPaused");
+		
+		// Unable to read at this time
+		
+		if (flags & kSocketSecure)
+		{
+			// Here's the situation:
+			// 
+			// We have an established secure connection.
+			// There may not be a currentRead, but there might be encrypted data sitting around for us.
+			// When the user does get around to issuing a read, that encrypted data will need to be decrypted.
+			// 
+			// So why make the user wait?
+			// We might as well get a head start on decrypting some data now.
+			// 
+			// The other reason we do this has to do with detecting a socket disconnection.
+			// The SSL/TLS protocol has it's own disconnection handshake.
+			// So when a secure socket is closed, a "goodbye" packet comes across the wire.
+			// We want to make sure we read the "goodbye" packet so we can properly detect the TCP disconnection.
+			
+			[self flushSSLBuffers];
+		}
+		
+		if ([self usingCFStreamForTLS])
+		{
+			// CFReadStream only fires once when there is available data.
+			// It won't fire again until we've invoked CFReadStreamRead.
+		}
+		else
+		{
+			// If the readSource is firing, we need to pause it
+			// or else it will continue to fire over and over again.
+			// 
+			// If the readSource is not firing,
+			// we want it to continue monitoring the socket.
+			
+			if (socketFDBytesAvailable > 0)
+			{
+				[self suspendReadSource];
+			}
+		}
+		return;
+	}
+	
+	BOOL hasBytesAvailable = NO;
+	unsigned long estimatedBytesAvailable = 0;
+	
+	if ([self usingCFStreamForTLS])
+	{
+		#if TARGET_OS_IPHONE
+		
+		// Requested CFStream, rather than SecureTransport, for TLS (via GCDAsyncSocketUseCFStreamForTLS)
+		
+		estimatedBytesAvailable = 0;
+		if ((flags & kSecureSocketHasBytesAvailable) && CFReadStreamHasBytesAvailable(readStream))
+			hasBytesAvailable = YES;
+		else
+			hasBytesAvailable = NO;
+		
+		#endif
+	}
+	else
+	{
+		estimatedBytesAvailable = socketFDBytesAvailable;
+		
+		if (flags & kSocketSecure)
+		{
+			// There are 2 buffers to be aware of here.
+			// 
+			// We are using SecureTransport, a TLS/SSL security layer which sits atop TCP.
+			// We issue a read to the SecureTranport API, which in turn issues a read to our SSLReadFunction.
+			// Our SSLReadFunction then reads from the BSD socket and returns the encrypted data to SecureTransport.
+			// SecureTransport then decrypts the data, and finally returns the decrypted data back to us.
+			// 
+			// The first buffer is one we create.
+			// SecureTransport often requests small amounts of data.
+			// This has to do with the encypted packets that are coming across the TCP stream.
+			// But it's non-optimal to do a bunch of small reads from the BSD socket.
+			// So our SSLReadFunction reads all available data from the socket (optimizing the sys call)
+			// and may store excess in the sslPreBuffer.
+			
+			estimatedBytesAvailable += [sslPreBuffer availableBytes];
+			
+			// The second buffer is within SecureTransport.
+			// As mentioned earlier, there are encrypted packets coming across the TCP stream.
+			// SecureTransport needs the entire packet to decrypt it.
+			// But if the entire packet produces X bytes of decrypted data,
+			// and we only asked SecureTransport for X/2 bytes of data,
+			// it must store the extra X/2 bytes of decrypted data for the next read.
+			// 
+			// The SSLGetBufferedReadSize function will tell us the size of this internal buffer.
+			// From the documentation:
+			// 
+			// "This function does not block or cause any low-level read operations to occur."
+			
+			size_t sslInternalBufSize = 0;
+			SSLGetBufferedReadSize(sslContext, &sslInternalBufSize);
+			
+			estimatedBytesAvailable += sslInternalBufSize;
+		}
+		
+		hasBytesAvailable = (estimatedBytesAvailable > 0);
+	}
+	
+	if ((hasBytesAvailable == NO) && ([preBuffer availableBytes] == 0))
+	{
+		LogVerbose(@"No data available to read...");
+		
+		// No data available to read.
+		
+		if (![self usingCFStreamForTLS])
+		{
+			// Need to wait for readSource to fire and notify us of
+			// available data in the socket's internal read buffer.
+			
+			[self resumeReadSource];
+		}
+		return;
+	}
+	
+	if (flags & kStartingReadTLS)
+	{
+		LogVerbose(@"Waiting for SSL/TLS handshake to complete");
+		
+		// The readQueue is waiting for SSL/TLS handshake to complete.
+		
+		if (flags & kStartingWriteTLS)
+		{
+			if ([self usingSecureTransportForTLS] && lastSSLHandshakeError == errSSLWouldBlock)
+			{
+				// We are in the process of a SSL Handshake.
+				// We were waiting for incoming data which has just arrived.
+				
+				[self ssl_continueSSLHandshake];
+			}
+		}
+		else
+		{
+			// We are still waiting for the writeQueue to drain and start the SSL/TLS process.
+			// We now know data is available to read.
+			
+			if (![self usingCFStreamForTLS])
+			{
+				// Suspend the read source or else it will continue to fire nonstop.
+				
+				[self suspendReadSource];
+			}
+		}
+		
+		return;
+	}
+	
+	BOOL done        = NO;  // Completed read operation
+	NSError *error   = nil; // Error occurred
+	
+	NSUInteger totalBytesReadForCurrentRead = 0;
+	
+	// 
+	// STEP 1 - READ FROM PREBUFFER
+	// 
+	
+	if ([preBuffer availableBytes] > 0)
+	{
+		// There are 3 types of read packets:
+		// 
+		// 1) Read all available data.
+		// 2) Read a specific length of data.
+		// 3) Read up to a particular terminator.
+		
+		NSUInteger bytesToCopy;
+		
+		if (currentRead->term != nil)
+		{
+			// Read type #3 - read up to a terminator
+			
+			bytesToCopy = [currentRead readLengthForTermWithPreBuffer:preBuffer found:&done];
+		}
+		else
+		{
+			// Read type #1 or #2
+			
+			bytesToCopy = [currentRead readLengthForNonTermWithHint:[preBuffer availableBytes]];
+		}
+		
+		// Make sure we have enough room in the buffer for our read.
+		
+		[currentRead ensureCapacityForAdditionalDataOfLength:bytesToCopy];
+		
+		// Copy bytes from prebuffer into packet buffer
+		
+		uint8_t *buffer = (uint8_t *)[currentRead->buffer mutableBytes] + currentRead->startOffset +
+		                                                                  currentRead->bytesDone;
+		
+		memcpy(buffer, [preBuffer readBuffer], bytesToCopy);
+		
+		// Remove the copied bytes from the preBuffer
+		[preBuffer didRead:bytesToCopy];
+		
+		LogVerbose(@"copied(%lu) preBufferLength(%zu)", (unsigned long)bytesToCopy, [preBuffer availableBytes]);
+		
+		// Update totals
+		
+		currentRead->bytesDone += bytesToCopy;
+		totalBytesReadForCurrentRead += bytesToCopy;
+		
+		// Check to see if the read operation is done
+		
+		if (currentRead->readLength > 0)
+		{
+			// Read type #2 - read a specific length of data
+			
+			done = (currentRead->bytesDone == currentRead->readLength);
+		}
+		else if (currentRead->term != nil)
+		{
+			// Read type #3 - read up to a terminator
+			
+			// Our 'done' variable was updated via the readLengthForTermWithPreBuffer:found: method
+			
+			if (!done && currentRead->maxLength > 0)
+			{
+				// We're not done and there's a set maxLength.
+				// Have we reached that maxLength yet?
+				
+				if (currentRead->bytesDone >= currentRead->maxLength)
+				{
+					error = [self readMaxedOutError];
+				}
+			}
+		}
+		else
+		{
+			// Read type #1 - read all available data
+			// 
+			// We're done as soon as
+			// - we've read all available data (in prebuffer and socket)
+			// - we've read the maxLength of read packet.
+			
+			done = ((currentRead->maxLength > 0) && (currentRead->bytesDone == currentRead->maxLength));
+		}
+		
+	}
+	
+	// 
+	// STEP 2 - READ FROM SOCKET
+	// 
+	
+	BOOL socketEOF = (flags & kSocketHasReadEOF) ? YES : NO;  // Nothing more to read via socket (end of file)
+	BOOL waiting   = !done && !error && !socketEOF && !hasBytesAvailable; // Ran out of data, waiting for more
+	
+	if (!done && !error && !socketEOF && hasBytesAvailable)
+	{
+		NSAssert(([preBuffer availableBytes] == 0), @"Invalid logic");
+		
+		BOOL readIntoPreBuffer = NO;
+		uint8_t *buffer = NULL;
+		size_t bytesRead = 0;
+		
+		if (flags & kSocketSecure)
+		{
+			if ([self usingCFStreamForTLS])
+			{
+				#if TARGET_OS_IPHONE
+				
+				// Using CFStream, rather than SecureTransport, for TLS
+				
+				NSUInteger defaultReadLength = (1024 * 32);
+				
+				NSUInteger bytesToRead = [currentRead optimalReadLengthWithDefault:defaultReadLength
+				                                                   shouldPreBuffer:&readIntoPreBuffer];
+				
+				// Make sure we have enough room in the buffer for our read.
+				//
+				// We are either reading directly into the currentRead->buffer,
+				// or we're reading into the temporary preBuffer.
+				
+				if (readIntoPreBuffer)
+				{
+					[preBuffer ensureCapacityForWrite:bytesToRead];
+					
+					buffer = [preBuffer writeBuffer];
+				}
+				else
+				{
+					[currentRead ensureCapacityForAdditionalDataOfLength:bytesToRead];
+					
+					buffer = (uint8_t *)[currentRead->buffer mutableBytes]
+					       + currentRead->startOffset
+					       + currentRead->bytesDone;
+				}
+				
+				// Read data into buffer
+				
+				CFIndex result = CFReadStreamRead(readStream, buffer, (CFIndex)bytesToRead);
+				LogVerbose(@"CFReadStreamRead(): result = %i", (int)result);
+				
+				if (result < 0)
+				{
+					error = (__bridge_transfer NSError *)CFReadStreamCopyError(readStream);
+				}
+				else if (result == 0)
+				{
+					socketEOF = YES;
+				}
+				else
+				{
+					waiting = YES;
+					bytesRead = (size_t)result;
+				}
+				
+				// We only know how many decrypted bytes were read.
+				// The actual number of bytes read was likely more due to the overhead of the encryption.
+				// So we reset our flag, and rely on the next callback to alert us of more data.
+				flags &= ~kSecureSocketHasBytesAvailable;
+				
+				#endif
+			}
+			else
+			{
+				// Using SecureTransport for TLS
+				//
+				// We know:
+				// - how many bytes are available on the socket
+				// - how many encrypted bytes are sitting in the sslPreBuffer
+				// - how many decypted bytes are sitting in the sslContext
+				//
+				// But we do NOT know:
+				// - how many encypted bytes are sitting in the sslContext
+				//
+				// So we play the regular game of using an upper bound instead.
+				
+				NSUInteger defaultReadLength = (1024 * 32);
+				
+				if (defaultReadLength < estimatedBytesAvailable) {
+					defaultReadLength = estimatedBytesAvailable + (1024 * 16);
+				}
+				
+				NSUInteger bytesToRead = [currentRead optimalReadLengthWithDefault:defaultReadLength
+				                                                   shouldPreBuffer:&readIntoPreBuffer];
+				
+				if (bytesToRead > SIZE_MAX) { // NSUInteger may be bigger than size_t
+					bytesToRead = SIZE_MAX;
+				}
+				
+				// Make sure we have enough room in the buffer for our read.
+				//
+				// We are either reading directly into the currentRead->buffer,
+				// or we're reading into the temporary preBuffer.
+				
+				if (readIntoPreBuffer)
+				{
+					[preBuffer ensureCapacityForWrite:bytesToRead];
+					
+					buffer = [preBuffer writeBuffer];
+				}
+				else
+				{
+					[currentRead ensureCapacityForAdditionalDataOfLength:bytesToRead];
+					
+					buffer = (uint8_t *)[currentRead->buffer mutableBytes]
+					       + currentRead->startOffset
+					       + currentRead->bytesDone;
+				}
+				
+				// The documentation from Apple states:
+				// 
+				//     "a read operation might return errSSLWouldBlock,
+				//      indicating that less data than requested was actually transferred"
+				// 
+				// However, starting around 10.7, the function will sometimes return noErr,
+				// even if it didn't read as much data as requested. So we need to watch out for that.
+				
+				OSStatus result;
+				do
+				{
+					void *loop_buffer = buffer + bytesRead;
+					size_t loop_bytesToRead = (size_t)bytesToRead - bytesRead;
+					size_t loop_bytesRead = 0;
+					
+					result = SSLRead(sslContext, loop_buffer, loop_bytesToRead, &loop_bytesRead);
+					LogVerbose(@"read from secure socket = %u", (unsigned)loop_bytesRead);
+					
+					bytesRead += loop_bytesRead;
+					
+				} while ((result == noErr) && (bytesRead < bytesToRead));
+				
+				
+				if (result != noErr)
+				{
+					if (result == errSSLWouldBlock)
+						waiting = YES;
+					else
+					{
+						if (result == errSSLClosedGraceful || result == errSSLClosedAbort)
+						{
+							// We've reached the end of the stream.
+							// Handle this the same way we would an EOF from the socket.
+							socketEOF = YES;
+							sslErrCode = result;
+						}
+						else
+						{
+							error = [self sslError:result];
+						}
+					}
+					// It's possible that bytesRead > 0, even if the result was errSSLWouldBlock.
+					// This happens when the SSLRead function is able to read some data,
+					// but not the entire amount we requested.
+					
+					if (bytesRead <= 0)
+					{
+						bytesRead = 0;
+					}
+				}
+				
+				// Do not modify socketFDBytesAvailable.
+				// It will be updated via the SSLReadFunction().
+			}
+		}
+		else
+		{
+			// Normal socket operation
+			
+			NSUInteger bytesToRead;
+			
+			// There are 3 types of read packets:
+			//
+			// 1) Read all available data.
+			// 2) Read a specific length of data.
+			// 3) Read up to a particular terminator.
+			
+			if (currentRead->term != nil)
+			{
+				// Read type #3 - read up to a terminator
+				
+				bytesToRead = [currentRead readLengthForTermWithHint:estimatedBytesAvailable
+				                                     shouldPreBuffer:&readIntoPreBuffer];
+			}
+			else
+			{
+				// Read type #1 or #2
+				
+				bytesToRead = [currentRead readLengthForNonTermWithHint:estimatedBytesAvailable];
+			}
+			
+			if (bytesToRead > SIZE_MAX) { // NSUInteger may be bigger than size_t (read param 3)
+				bytesToRead = SIZE_MAX;
+			}
+			
+			// Make sure we have enough room in the buffer for our read.
+			//
+			// We are either reading directly into the currentRead->buffer,
+			// or we're reading into the temporary preBuffer.
+			
+			if (readIntoPreBuffer)
+			{
+				[preBuffer ensureCapacityForWrite:bytesToRead];
+				
+				buffer = [preBuffer writeBuffer];
+			}
+			else
+			{
+				[currentRead ensureCapacityForAdditionalDataOfLength:bytesToRead];
+				
+				buffer = (uint8_t *)[currentRead->buffer mutableBytes]
+				       + currentRead->startOffset
+				       + currentRead->bytesDone;
+			}
+			
+			// Read data into buffer
+			
+			int socketFD = (socket4FD != SOCKET_NULL) ? socket4FD : (socket6FD != SOCKET_NULL) ? socket6FD : socketUN;
+			
+			ssize_t result = read(socketFD, buffer, (size_t)bytesToRead);
+			LogVerbose(@"read from socket = %i", (int)result);
+			
+			if (result < 0)
+			{
+				if (errno == EWOULDBLOCK)
+					waiting = YES;
+				else
+					error = [self errnoErrorWithReason:@"Error in read() function"];
+				
+				socketFDBytesAvailable = 0;
+			}
+			else if (result == 0)
+			{
+				socketEOF = YES;
+				socketFDBytesAvailable = 0;
+			}
+			else
+			{
+				bytesRead = result;
+				
+				if (bytesRead < bytesToRead)
+				{
+					// The read returned less data than requested.
+					// This means socketFDBytesAvailable was a bit off due to timing,
+					// because we read from the socket right when the readSource event was firing.
+					socketFDBytesAvailable = 0;
+				}
+				else
+				{
+					if (socketFDBytesAvailable <= bytesRead)
+						socketFDBytesAvailable = 0;
+					else
+						socketFDBytesAvailable -= bytesRead;
+				}
+				
+				if (socketFDBytesAvailable == 0)
+				{
+					waiting = YES;
+				}
+			}
+		}
+		
+		if (bytesRead > 0)
+		{
+			// Check to see if the read operation is done
+			
+			if (currentRead->readLength > 0)
+			{
+				// Read type #2 - read a specific length of data
+				// 
+				// Note: We should never be using a prebuffer when we're reading a specific length of data.
+				
+				NSAssert(readIntoPreBuffer == NO, @"Invalid logic");
+				
+				currentRead->bytesDone += bytesRead;
+				totalBytesReadForCurrentRead += bytesRead;
+				
+				done = (currentRead->bytesDone == currentRead->readLength);
+			}
+			else if (currentRead->term != nil)
+			{
+				// Read type #3 - read up to a terminator
+				
+				if (readIntoPreBuffer)
+				{
+					// We just read a big chunk of data into the preBuffer
+					
+					[preBuffer didWrite:bytesRead];
+					LogVerbose(@"read data into preBuffer - preBuffer.length = %zu", [preBuffer availableBytes]);
+					
+					// Search for the terminating sequence
+					
+					NSUInteger bytesToCopy = [currentRead readLengthForTermWithPreBuffer:preBuffer found:&done];
+					LogVerbose(@"copying %lu bytes from preBuffer", (unsigned long)bytesToCopy);
+					
+					// Ensure there's room on the read packet's buffer
+					
+					[currentRead ensureCapacityForAdditionalDataOfLength:bytesToCopy];
+					
+					// Copy bytes from prebuffer into read buffer
+					
+					uint8_t *readBuf = (uint8_t *)[currentRead->buffer mutableBytes] + currentRead->startOffset
+					                                                                 + currentRead->bytesDone;
+					
+					memcpy(readBuf, [preBuffer readBuffer], bytesToCopy);
+					
+					// Remove the copied bytes from the prebuffer
+					[preBuffer didRead:bytesToCopy];
+					LogVerbose(@"preBuffer.length = %zu", [preBuffer availableBytes]);
+					
+					// Update totals
+					currentRead->bytesDone += bytesToCopy;
+					totalBytesReadForCurrentRead += bytesToCopy;
+					
+					// Our 'done' variable was updated via the readLengthForTermWithPreBuffer:found: method above
+				}
+				else
+				{
+					// We just read a big chunk of data directly into the packet's buffer.
+					// We need to move any overflow into the prebuffer.
+					
+					NSInteger overflow = [currentRead searchForTermAfterPreBuffering:bytesRead];
+					
+					if (overflow == 0)
+					{
+						// Perfect match!
+						// Every byte we read stays in the read buffer,
+						// and the last byte we read was the last byte of the term.
+						
+						currentRead->bytesDone += bytesRead;
+						totalBytesReadForCurrentRead += bytesRead;
+						done = YES;
+					}
+					else if (overflow > 0)
+					{
+						// The term was found within the data that we read,
+						// and there are extra bytes that extend past the end of the term.
+						// We need to move these excess bytes out of the read packet and into the prebuffer.
+						
+						NSInteger underflow = bytesRead - overflow;
+						
+						// Copy excess data into preBuffer
+						
+						LogVerbose(@"copying %ld overflow bytes into preBuffer", (long)overflow);
+						[preBuffer ensureCapacityForWrite:overflow];
+						
+						uint8_t *overflowBuffer = buffer + underflow;
+						memcpy([preBuffer writeBuffer], overflowBuffer, overflow);
+						
+						[preBuffer didWrite:overflow];
+						LogVerbose(@"preBuffer.length = %zu", [preBuffer availableBytes]);
+						
+						// Note: The completeCurrentRead method will trim the buffer for us.
+						
+						currentRead->bytesDone += underflow;
+						totalBytesReadForCurrentRead += underflow;
+						done = YES;
+					}
+					else
+					{
+						// The term was not found within the data that we read.
+						
+						currentRead->bytesDone += bytesRead;
+						totalBytesReadForCurrentRead += bytesRead;
+						done = NO;
+					}
+				}
+				
+				if (!done && currentRead->maxLength > 0)
+				{
+					// We're not done and there's a set maxLength.
+					// Have we reached that maxLength yet?
+					
+					if (currentRead->bytesDone >= currentRead->maxLength)
+					{
+						error = [self readMaxedOutError];
+					}
+				}
+			}
+			else
+			{
+				// Read type #1 - read all available data
+				
+				if (readIntoPreBuffer)
+				{
+					// We just read a chunk of data into the preBuffer
+					
+					[preBuffer didWrite:bytesRead];
+					
+					// Now copy the data into the read packet.
+					// 
+					// Recall that we didn't read directly into the packet's buffer to avoid
+					// over-allocating memory since we had no clue how much data was available to be read.
+					// 
+					// Ensure there's room on the read packet's buffer
+					
+					[currentRead ensureCapacityForAdditionalDataOfLength:bytesRead];
+					
+					// Copy bytes from prebuffer into read buffer
+					
+					uint8_t *readBuf = (uint8_t *)[currentRead->buffer mutableBytes] + currentRead->startOffset
+					                                                                 + currentRead->bytesDone;
+					
+					memcpy(readBuf, [preBuffer readBuffer], bytesRead);
+					
+					// Remove the copied bytes from the prebuffer
+					[preBuffer didRead:bytesRead];
+					
+					// Update totals
+					currentRead->bytesDone += bytesRead;
+					totalBytesReadForCurrentRead += bytesRead;
+				}
+				else
+				{
+					currentRead->bytesDone += bytesRead;
+					totalBytesReadForCurrentRead += bytesRead;
+				}
+				
+				done = YES;
+			}
+			
+		} // if (bytesRead > 0)
+		
+	} // if (!done && !error && !socketEOF && hasBytesAvailable)
+	
+	
+	if (!done && currentRead->readLength == 0 && currentRead->term == nil)
+	{
+		// Read type #1 - read all available data
+		// 
+		// We might arrive here if we read data from the prebuffer but not from the socket.
+		
+		done = (totalBytesReadForCurrentRead > 0);
+	}
+	
+	// Check to see if we're done, or if we've made progress
+	
+	if (done)
+	{
+		[self completeCurrentRead];
+		
+		if (!error && (!socketEOF || [preBuffer availableBytes] > 0))
+		{
+			[self maybeDequeueRead];
+		}
+	}
+	else if (totalBytesReadForCurrentRead > 0)
+	{
+		// We're not done read type #2 or #3 yet, but we have read in some bytes
+		//
+		// We ensure that `waiting` is set in order to resume the readSource (if it is suspended). It is
+		// possible to reach this point and `waiting` not be set, if the current read's length is
+		// sufficiently large. In that case, we may have read to some upperbound successfully, but
+		// that upperbound could be smaller than the desired length.
+		waiting = YES;
+
+		__strong id theDelegate = delegate;
+		
+		if (delegateQueue && [theDelegate respondsToSelector:@selector(socket:didReadPartialDataOfLength:tag:)])
+		{
+			long theReadTag = currentRead->tag;
+			
+			dispatch_async(delegateQueue, ^{ @autoreleasepool {
+				
+				[theDelegate socket:self didReadPartialDataOfLength:totalBytesReadForCurrentRead tag:theReadTag];
+			}});
+		}
+	}
+	
+	// Check for errors
+	
+	if (error)
+	{
+		[self closeWithError:error];
+	}
+	else if (socketEOF)
+	{
+		[self doReadEOF];
+	}
+	else if (waiting)
+	{
+		if (![self usingCFStreamForTLS])
+		{
+			// Monitor the socket for readability (if we're not already doing so)
+			[self resumeReadSource];
+		}
+	}
+	
+	// Do not add any code here without first adding return statements in the error cases above.
+}
+
+- (void)doReadEOF
+{
+	LogTrace();
+	
+	// This method may be called more than once.
+	// If the EOF is read while there is still data in the preBuffer,
+	// then this method may be called continually after invocations of doReadData to see if it's time to disconnect.
+	
+	flags |= kSocketHasReadEOF;
+	
+	if (flags & kSocketSecure)
+	{
+		// If the SSL layer has any buffered data, flush it into the preBuffer now.
+		
+		[self flushSSLBuffers];
+	}
+	
+	BOOL shouldDisconnect = NO;
+	NSError *error = nil;
+	
+	if ((flags & kStartingReadTLS) || (flags & kStartingWriteTLS))
+	{
+		// We received an EOF during or prior to startTLS.
+		// The SSL/TLS handshake is now impossible, so this is an unrecoverable situation.
+		
+		shouldDisconnect = YES;
+		
+		if ([self usingSecureTransportForTLS])
+		{
+			error = [self sslError:errSSLClosedAbort];
+		}
+	}
+	else if (flags & kReadStreamClosed)
+	{
+		// The preBuffer has already been drained.
+		// The config allows half-duplex connections.
+		// We've previously checked the socket, and it appeared writeable.
+		// So we marked the read stream as closed and notified the delegate.
+		// 
+		// As per the half-duplex contract, the socket will be closed when a write fails,
+		// or when the socket is manually closed.
+		
+		shouldDisconnect = NO;
+	}
+	else if ([preBuffer availableBytes] > 0)
+	{
+		LogVerbose(@"Socket reached EOF, but there is still data available in prebuffer");
+		
+		// Although we won't be able to read any more data from the socket,
+		// there is existing data that has been prebuffered that we can read.
+		
+		shouldDisconnect = NO;
+	}
+	else if (config & kAllowHalfDuplexConnection)
+	{
+		// We just received an EOF (end of file) from the socket's read stream.
+		// This means the remote end of the socket (the peer we're connected to)
+		// has explicitly stated that it will not be sending us any more data.
+		// 
+		// Query the socket to see if it is still writeable. (Perhaps the peer will continue reading data from us)
+		
+		int socketFD = (socket4FD != SOCKET_NULL) ? socket4FD : (socket6FD != SOCKET_NULL) ? socket6FD : socketUN;
+		
+		struct pollfd pfd[1];
+		pfd[0].fd = socketFD;
+		pfd[0].events = POLLOUT;
+		pfd[0].revents = 0;
+		
+		poll(pfd, 1, 0);
+		
+		if (pfd[0].revents & POLLOUT)
+		{
+			// Socket appears to still be writeable
+			
+			shouldDisconnect = NO;
+			flags |= kReadStreamClosed;
+			
+			// Notify the delegate that we're going half-duplex
+			
+			__strong id theDelegate = delegate;
+
+			if (delegateQueue && [theDelegate respondsToSelector:@selector(socketDidCloseReadStream:)])
+			{
+				dispatch_async(delegateQueue, ^{ @autoreleasepool {
+					
+					[theDelegate socketDidCloseReadStream:self];
+				}});
+			}
+		}
+		else
+		{
+			shouldDisconnect = YES;
+		}
+	}
+	else
+	{
+		shouldDisconnect = YES;
+	}
+	
+	
+	if (shouldDisconnect)
+	{
+		if (error == nil)
+		{
+			if ([self usingSecureTransportForTLS])
+			{
+				if (sslErrCode != noErr && sslErrCode != errSSLClosedGraceful)
+				{
+					error = [self sslError:sslErrCode];
+				}
+				else
+				{
+					error = [self connectionClosedError];
+				}
+			}
+			else
+			{
+				error = [self connectionClosedError];
+			}
+		}
+		[self closeWithError:error];
+	}
+	else
+	{
+		if (![self usingCFStreamForTLS])
+		{
+			// Suspend the read source (if needed)
+			
+			[self suspendReadSource];
+		}
+	}
+}
+
+- (void)completeCurrentRead
+{
+	LogTrace();
+	
+	NSAssert(currentRead, @"Trying to complete current read when there is no current read.");
+	
+	
+	NSData *result = nil;
+	
+	if (currentRead->bufferOwner)
+	{
+		// We created the buffer on behalf of the user.
+		// Trim our buffer to be the proper size.
+		[currentRead->buffer setLength:currentRead->bytesDone];
+		
+		result = currentRead->buffer;
+	}
+	else
+	{
+		// We did NOT create the buffer.
+		// The buffer is owned by the caller.
+		// Only trim the buffer if we had to increase its size.
+		
+		if ([currentRead->buffer length] > currentRead->originalBufferLength)
+		{
+			NSUInteger readSize = currentRead->startOffset + currentRead->bytesDone;
+			NSUInteger origSize = currentRead->originalBufferLength;
+			
+			NSUInteger buffSize = MAX(readSize, origSize);
+			
+			[currentRead->buffer setLength:buffSize];
+		}
+		
+		uint8_t *buffer = (uint8_t *)[currentRead->buffer mutableBytes] + currentRead->startOffset;
+		
+		result = [NSData dataWithBytesNoCopy:buffer length:currentRead->bytesDone freeWhenDone:NO];
+	}
+	
+	__strong id theDelegate = delegate;
+
+	if (delegateQueue && [theDelegate respondsToSelector:@selector(socket:didReadData:withTag:)])
+	{
+		GCDAsyncReadPacket *theRead = currentRead; // Ensure currentRead retained since result may not own buffer
+		
+		dispatch_async(delegateQueue, ^{ @autoreleasepool {
+			
+			[theDelegate socket:self didReadData:result withTag:theRead->tag];
+		}});
+	}
+	
+	[self endCurrentRead];
+}
+
+- (void)endCurrentRead
+{
+	if (readTimer)
+	{
+		dispatch_source_cancel(readTimer);
+		readTimer = NULL;
+	}
+	
+	currentRead = nil;
+}
+
+- (void)setupReadTimerWithTimeout:(NSTimeInterval)timeout
+{
+	if (timeout >= 0.0)
+	{
+		readTimer = dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER, 0, 0, socketQueue);
+		
+		__weak GCDAsyncSocket *weakSelf = self;
+		
+		dispatch_source_set_event_handler(readTimer, ^{ @autoreleasepool {
+		#pragma clang diagnostic push
+		#pragma clang diagnostic warning "-Wimplicit-retain-self"
+			
+			__strong GCDAsyncSocket *strongSelf = weakSelf;
+			if (strongSelf == nil) return_from_block;
+			
+			[strongSelf doReadTimeout];
+			
+		#pragma clang diagnostic pop
+		}});
+		
+		#if !OS_OBJECT_USE_OBJC
+		dispatch_source_t theReadTimer = readTimer;
+		dispatch_source_set_cancel_handler(readTimer, ^{
+		#pragma clang diagnostic push
+		#pragma clang diagnostic warning "-Wimplicit-retain-self"
+			
+			LogVerbose(@"dispatch_release(readTimer)");
+			dispatch_release(theReadTimer);
+			
+		#pragma clang diagnostic pop
+		});
+		#endif
+		
+		dispatch_time_t tt = dispatch_time(DISPATCH_TIME_NOW, (int64_t)(timeout * NSEC_PER_SEC));
+		
+		dispatch_source_set_timer(readTimer, tt, DISPATCH_TIME_FOREVER, 0);
+		dispatch_resume(readTimer);
+	}
+}
+
+- (void)doReadTimeout
+{
+	// This is a little bit tricky.
+	// Ideally we'd like to synchronously query the delegate about a timeout extension.
+	// But if we do so synchronously we risk a possible deadlock.
+	// So instead we have to do so asynchronously, and callback to ourselves from within the delegate block.
+	
+	flags |= kReadsPaused;
+	
+	__strong id theDelegate = delegate;
+
+	if (delegateQueue && [theDelegate respondsToSelector:@selector(socket:shouldTimeoutReadWithTag:elapsed:bytesDone:)])
+	{
+		GCDAsyncReadPacket *theRead = currentRead;
+		
+		dispatch_async(delegateQueue, ^{ @autoreleasepool {
+			
+			NSTimeInterval timeoutExtension = 0.0;
+			
+			timeoutExtension = [theDelegate socket:self shouldTimeoutReadWithTag:theRead->tag
+			                                                             elapsed:theRead->timeout
+			                                                           bytesDone:theRead->bytesDone];
+			
+            dispatch_async(self->socketQueue, ^{ @autoreleasepool {
+				
+				[self doReadTimeoutWithExtension:timeoutExtension];
+			}});
+		}});
+	}
+	else
+	{
+		[self doReadTimeoutWithExtension:0.0];
+	}
+}
+
+- (void)doReadTimeoutWithExtension:(NSTimeInterval)timeoutExtension
+{
+	if (currentRead)
+	{
+		if (timeoutExtension > 0.0)
+		{
+			currentRead->timeout += timeoutExtension;
+			
+			// Reschedule the timer
+			dispatch_time_t tt = dispatch_time(DISPATCH_TIME_NOW, (int64_t)(timeoutExtension * NSEC_PER_SEC));
+			dispatch_source_set_timer(readTimer, tt, DISPATCH_TIME_FOREVER, 0);
+			
+			// Unpause reads, and continue
+			flags &= ~kReadsPaused;
+			[self doReadData];
+		}
+		else
+		{
+			LogVerbose(@"ReadTimeout");
+			
+			[self closeWithError:[self readTimeoutError]];
+		}
+	}
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+#pragma mark Writing
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+- (void)writeData:(NSData *)data withTimeout:(NSTimeInterval)timeout tag:(long)tag
+{
+	if ([data length] == 0) return;
+	
+	GCDAsyncWritePacket *packet = [[GCDAsyncWritePacket alloc] initWithData:data timeout:timeout tag:tag];
+	
+	dispatch_async(socketQueue, ^{ @autoreleasepool {
+		
+		LogTrace();
+		
+        if ((self->flags & kSocketStarted) && !(self->flags & kForbidReadsWrites))
+		{
+            [self->writeQueue addObject:packet];
+			[self maybeDequeueWrite];
+		}
+	}});
+	
+	// Do not rely on the block being run in order to release the packet,
+	// as the queue might get released without the block completing.
+}
+
+- (float)progressOfWriteReturningTag:(long *)tagPtr bytesDone:(NSUInteger *)donePtr total:(NSUInteger *)totalPtr
+{
+	__block float result = 0.0F;
+	
+	dispatch_block_t block = ^{
+		
+        if (!self->currentWrite || ![self->currentWrite isKindOfClass:[GCDAsyncWritePacket class]])
+		{
+			// We're not writing anything right now.
+			
+			if (tagPtr != NULL)   *tagPtr = 0;
+			if (donePtr != NULL)  *donePtr = 0;
+			if (totalPtr != NULL) *totalPtr = 0;
+			
+			result = NAN;
+		}
+		else
+		{
+            NSUInteger done = self->currentWrite->bytesDone;
+            NSUInteger total = [self->currentWrite->buffer length];
+			
+            if (tagPtr != NULL)   *tagPtr = self->currentWrite->tag;
+			if (donePtr != NULL)  *donePtr = done;
+			if (totalPtr != NULL) *totalPtr = total;
+			
+			result = (float)done / (float)total;
+		}
+	};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_sync(socketQueue, block);
+	
+	return result;
+}
+
+/**
+ * Conditionally starts a new write.
+ * 
+ * It is called when:
+ * - a user requests a write
+ * - after a write request has finished (to handle the next request)
+ * - immediately after the socket opens to handle any pending requests
+ * 
+ * This method also handles auto-disconnect post read/write completion.
+**/
+- (void)maybeDequeueWrite
+{
+	LogTrace();
+	NSAssert(dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey), @"Must be dispatched on socketQueue");
+	
+	
+	// If we're not currently processing a write AND we have an available write stream
+	if ((currentWrite == nil) && (flags & kConnected))
+	{
+		if ([writeQueue count] > 0)
+		{
+			// Dequeue the next object in the write queue
+			currentWrite = [writeQueue objectAtIndex:0];
+			[writeQueue removeObjectAtIndex:0];
+			
+			
+			if ([currentWrite isKindOfClass:[GCDAsyncSpecialPacket class]])
+			{
+				LogVerbose(@"Dequeued GCDAsyncSpecialPacket");
+				
+				// Attempt to start TLS
+				flags |= kStartingWriteTLS;
+				
+				// This method won't do anything unless both kStartingReadTLS and kStartingWriteTLS are set
+				[self maybeStartTLS];
+			}
+			else
+			{
+				LogVerbose(@"Dequeued GCDAsyncWritePacket");
+				
+				// Setup write timer (if needed)
+				[self setupWriteTimerWithTimeout:currentWrite->timeout];
+				
+				// Immediately write, if possible
+				[self doWriteData];
+			}
+		}
+		else if (flags & kDisconnectAfterWrites)
+		{
+			if (flags & kDisconnectAfterReads)
+			{
+				if (([readQueue count] == 0) && (currentRead == nil))
+				{
+					[self closeWithError:nil];
+				}
+			}
+			else
+			{
+				[self closeWithError:nil];
+			}
+		}
+	}
+}
+
+- (void)doWriteData
+{
+	LogTrace();
+	
+	// This method is called by the writeSource via the socketQueue
+	
+	if ((currentWrite == nil) || (flags & kWritesPaused))
+	{
+		LogVerbose(@"No currentWrite or kWritesPaused");
+		
+		// Unable to write at this time
+		
+		if ([self usingCFStreamForTLS])
+		{
+			// CFWriteStream only fires once when there is available data.
+			// It won't fire again until we've invoked CFWriteStreamWrite.
+		}
+		else
+		{
+			// If the writeSource is firing, we need to pause it
+			// or else it will continue to fire over and over again.
+			
+			if (flags & kSocketCanAcceptBytes)
+			{
+				[self suspendWriteSource];
+			}
+		}
+		return;
+	}
+	
+	if (!(flags & kSocketCanAcceptBytes))
+	{
+		LogVerbose(@"No space available to write...");
+		
+		// No space available to write.
+		
+		if (![self usingCFStreamForTLS])
+		{
+			// Need to wait for writeSource to fire and notify us of
+			// available space in the socket's internal write buffer.
+			
+			[self resumeWriteSource];
+		}
+		return;
+	}
+	
+	if (flags & kStartingWriteTLS)
+	{
+		LogVerbose(@"Waiting for SSL/TLS handshake to complete");
+		
+		// The writeQueue is waiting for SSL/TLS handshake to complete.
+		
+		if (flags & kStartingReadTLS)
+		{
+			if ([self usingSecureTransportForTLS] && lastSSLHandshakeError == errSSLWouldBlock)
+			{
+				// We are in the process of a SSL Handshake.
+				// We were waiting for available space in the socket's internal OS buffer to continue writing.
+			
+				[self ssl_continueSSLHandshake];
+			}
+		}
+		else
+		{
+			// We are still waiting for the readQueue to drain and start the SSL/TLS process.
+			// We now know we can write to the socket.
+			
+			if (![self usingCFStreamForTLS])
+			{
+				// Suspend the write source or else it will continue to fire nonstop.
+				
+				[self suspendWriteSource];
+			}
+		}
+		
+		return;
+	}
+	
+	// Note: This method is not called if currentWrite is a GCDAsyncSpecialPacket (startTLS packet)
+	
+	BOOL waiting = NO;
+	NSError *error = nil;
+	size_t bytesWritten = 0;
+	
+	if (flags & kSocketSecure)
+	{
+		if ([self usingCFStreamForTLS])
+		{
+			#if TARGET_OS_IPHONE
+			
+			// 
+			// Writing data using CFStream (over internal TLS)
+			// 
+			
+			const uint8_t *buffer = (const uint8_t *)[currentWrite->buffer bytes] + currentWrite->bytesDone;
+			
+			NSUInteger bytesToWrite = [currentWrite->buffer length] - currentWrite->bytesDone;
+			
+			if (bytesToWrite > SIZE_MAX) // NSUInteger may be bigger than size_t (write param 3)
+			{
+				bytesToWrite = SIZE_MAX;
+			}
+		
+			CFIndex result = CFWriteStreamWrite(writeStream, buffer, (CFIndex)bytesToWrite);
+			LogVerbose(@"CFWriteStreamWrite(%lu) = %li", (unsigned long)bytesToWrite, result);
+		
+			if (result < 0)
+			{
+				error = (__bridge_transfer NSError *)CFWriteStreamCopyError(writeStream);
+			}
+			else
+			{
+				bytesWritten = (size_t)result;
+				
+				// We always set waiting to true in this scenario.
+				// CFStream may have altered our underlying socket to non-blocking.
+				// Thus if we attempt to write without a callback, we may end up blocking our queue.
+				waiting = YES;
+			}
+			
+			#endif
+		}
+		else
+		{
+			// We're going to use the SSLWrite function.
+			// 
+			// OSStatus SSLWrite(SSLContextRef context, const void *data, size_t dataLength, size_t *processed)
+			// 
+			// Parameters:
+			// context     - An SSL session context reference.
+			// data        - A pointer to the buffer of data to write.
+			// dataLength  - The amount, in bytes, of data to write.
+			// processed   - On return, the length, in bytes, of the data actually written.
+			// 
+			// It sounds pretty straight-forward,
+			// but there are a few caveats you should be aware of.
+			// 
+			// The SSLWrite method operates in a non-obvious (and rather annoying) manner.
+			// According to the documentation:
+			// 
+			//   Because you may configure the underlying connection to operate in a non-blocking manner,
+			//   a write operation might return errSSLWouldBlock, indicating that less data than requested
+			//   was actually transferred. In this case, you should repeat the call to SSLWrite until some
+			//   other result is returned.
+			// 
+			// This sounds perfect, but when our SSLWriteFunction returns errSSLWouldBlock,
+			// then the SSLWrite method returns (with the proper errSSLWouldBlock return value),
+			// but it sets processed to dataLength !!
+			// 
+			// In other words, if the SSLWrite function doesn't completely write all the data we tell it to,
+			// then it doesn't tell us how many bytes were actually written. So, for example, if we tell it to
+			// write 256 bytes then it might actually write 128 bytes, but then report 0 bytes written.
+			// 
+			// You might be wondering:
+			// If the SSLWrite function doesn't tell us how many bytes were written,
+			// then how in the world are we supposed to update our parameters (buffer & bytesToWrite)
+			// for the next time we invoke SSLWrite?
+			// 
+			// The answer is that SSLWrite cached all the data we told it to write,
+			// and it will push out that data next time we call SSLWrite.
+			// If we call SSLWrite with new data, it will push out the cached data first, and then the new data.
+			// If we call SSLWrite with empty data, then it will simply push out the cached data.
+			// 
+			// For this purpose we're going to break large writes into a series of smaller writes.
+			// This allows us to report progress back to the delegate.
+			
+			OSStatus result;
+			
+			BOOL hasCachedDataToWrite = (sslWriteCachedLength > 0);
+			BOOL hasNewDataToWrite = YES;
+			
+			if (hasCachedDataToWrite)
+			{
+				size_t processed = 0;
+				
+				result = SSLWrite(sslContext, NULL, 0, &processed);
+				
+				if (result == noErr)
+				{
+					bytesWritten = sslWriteCachedLength;
+					sslWriteCachedLength = 0;
+					
+					if ([currentWrite->buffer length] == (currentWrite->bytesDone + bytesWritten))
+					{
+						// We've written all data for the current write.
+						hasNewDataToWrite = NO;
+					}
+				}
+				else
+				{
+					if (result == errSSLWouldBlock)
+					{
+						waiting = YES;
+					}
+					else
+					{
+						error = [self sslError:result];
+					}
+					
+					// Can't write any new data since we were unable to write the cached data.
+					hasNewDataToWrite = NO;
+				}
+			}
+			
+			if (hasNewDataToWrite)
+			{
+				const uint8_t *buffer = (const uint8_t *)[currentWrite->buffer bytes]
+				                                        + currentWrite->bytesDone
+				                                        + bytesWritten;
+				
+				NSUInteger bytesToWrite = [currentWrite->buffer length] - currentWrite->bytesDone - bytesWritten;
+				
+				if (bytesToWrite > SIZE_MAX) // NSUInteger may be bigger than size_t (write param 3)
+				{
+					bytesToWrite = SIZE_MAX;
+				}
+				
+				size_t bytesRemaining = bytesToWrite;
+				
+				BOOL keepLooping = YES;
+				while (keepLooping)
+				{
+					const size_t sslMaxBytesToWrite = 32768;
+					size_t sslBytesToWrite = MIN(bytesRemaining, sslMaxBytesToWrite);
+					size_t sslBytesWritten = 0;
+					
+					result = SSLWrite(sslContext, buffer, sslBytesToWrite, &sslBytesWritten);
+					
+					if (result == noErr)
+					{
+						buffer += sslBytesWritten;
+						bytesWritten += sslBytesWritten;
+						bytesRemaining -= sslBytesWritten;
+						
+						keepLooping = (bytesRemaining > 0);
+					}
+					else
+					{
+						if (result == errSSLWouldBlock)
+						{
+							waiting = YES;
+							sslWriteCachedLength = sslBytesToWrite;
+						}
+						else
+						{
+							error = [self sslError:result];
+						}
+						
+						keepLooping = NO;
+					}
+					
+				} // while (keepLooping)
+				
+			} // if (hasNewDataToWrite)
+		}
+	}
+	else
+	{
+		// 
+		// Writing data directly over raw socket
+		// 
+		
+		int socketFD = (socket4FD != SOCKET_NULL) ? socket4FD : (socket6FD != SOCKET_NULL) ? socket6FD : socketUN;
+		
+		const uint8_t *buffer = (const uint8_t *)[currentWrite->buffer bytes] + currentWrite->bytesDone;
+		
+		NSUInteger bytesToWrite = [currentWrite->buffer length] - currentWrite->bytesDone;
+		
+		if (bytesToWrite > SIZE_MAX) // NSUInteger may be bigger than size_t (write param 3)
+		{
+			bytesToWrite = SIZE_MAX;
+		}
+		
+		ssize_t result = write(socketFD, buffer, (size_t)bytesToWrite);
+		LogVerbose(@"wrote to socket = %zd", result);
+		
+		// Check results
+		if (result < 0)
+		{
+			if (errno == EWOULDBLOCK)
+			{
+				waiting = YES;
+			}
+			else
+			{
+				error = [self errnoErrorWithReason:@"Error in write() function"];
+			}
+		}
+		else
+		{
+			bytesWritten = result;
+		}
+	}
+	
+	// We're done with our writing.
+	// If we explictly ran into a situation where the socket told us there was no room in the buffer,
+	// then we immediately resume listening for notifications.
+	// 
+	// We must do this before we dequeue another write,
+	// as that may in turn invoke this method again.
+	// 
+	// Note that if CFStream is involved, it may have maliciously put our socket in blocking mode.
+	
+	if (waiting)
+	{
+		flags &= ~kSocketCanAcceptBytes;
+		
+		if (![self usingCFStreamForTLS])
+		{
+			[self resumeWriteSource];
+		}
+	}
+	
+	// Check our results
+	
+	BOOL done = NO;
+	
+	if (bytesWritten > 0)
+	{
+		// Update total amount read for the current write
+		currentWrite->bytesDone += bytesWritten;
+		LogVerbose(@"currentWrite->bytesDone = %lu", (unsigned long)currentWrite->bytesDone);
+		
+		// Is packet done?
+		done = (currentWrite->bytesDone == [currentWrite->buffer length]);
+	}
+	
+	if (done)
+	{
+		[self completeCurrentWrite];
+		
+		if (!error)
+		{
+			dispatch_async(socketQueue, ^{ @autoreleasepool{
+				
+				[self maybeDequeueWrite];
+			}});
+		}
+	}
+	else
+	{
+		// We were unable to finish writing the data,
+		// so we're waiting for another callback to notify us of available space in the lower-level output buffer.
+		
+		if (!waiting && !error)
+		{
+			// This would be the case if our write was able to accept some data, but not all of it.
+			
+			flags &= ~kSocketCanAcceptBytes;
+			
+			if (![self usingCFStreamForTLS])
+			{
+				[self resumeWriteSource];
+			}
+		}
+		
+		if (bytesWritten > 0)
+		{
+			// We're not done with the entire write, but we have written some bytes
+			
+			__strong id theDelegate = delegate;
+
+			if (delegateQueue && [theDelegate respondsToSelector:@selector(socket:didWritePartialDataOfLength:tag:)])
+			{
+				long theWriteTag = currentWrite->tag;
+				
+				dispatch_async(delegateQueue, ^{ @autoreleasepool {
+					
+					[theDelegate socket:self didWritePartialDataOfLength:bytesWritten tag:theWriteTag];
+				}});
+			}
+		}
+	}
+	
+	// Check for errors
+	
+	if (error)
+	{
+		[self closeWithError:[self errnoErrorWithReason:@"Error in write() function"]];
+	}
+	
+	// Do not add any code here without first adding a return statement in the error case above.
+}
+
+- (void)completeCurrentWrite
+{
+	LogTrace();
+	
+	NSAssert(currentWrite, @"Trying to complete current write when there is no current write.");
+	
+
+	__strong id theDelegate = delegate;
+	
+	if (delegateQueue && [theDelegate respondsToSelector:@selector(socket:didWriteDataWithTag:)])
+	{
+		long theWriteTag = currentWrite->tag;
+		
+		dispatch_async(delegateQueue, ^{ @autoreleasepool {
+			
+			[theDelegate socket:self didWriteDataWithTag:theWriteTag];
+		}});
+	}
+	
+	[self endCurrentWrite];
+}
+
+- (void)endCurrentWrite
+{
+	if (writeTimer)
+	{
+		dispatch_source_cancel(writeTimer);
+		writeTimer = NULL;
+	}
+	
+	currentWrite = nil;
+}
+
+- (void)setupWriteTimerWithTimeout:(NSTimeInterval)timeout
+{
+	if (timeout >= 0.0)
+	{
+		writeTimer = dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER, 0, 0, socketQueue);
+		
+		__weak GCDAsyncSocket *weakSelf = self;
+		
+		dispatch_source_set_event_handler(writeTimer, ^{ @autoreleasepool {
+		#pragma clang diagnostic push
+		#pragma clang diagnostic warning "-Wimplicit-retain-self"
+			
+			__strong GCDAsyncSocket *strongSelf = weakSelf;
+			if (strongSelf == nil) return_from_block;
+			
+			[strongSelf doWriteTimeout];
+			
+		#pragma clang diagnostic pop
+		}});
+		
+		#if !OS_OBJECT_USE_OBJC
+		dispatch_source_t theWriteTimer = writeTimer;
+		dispatch_source_set_cancel_handler(writeTimer, ^{
+		#pragma clang diagnostic push
+		#pragma clang diagnostic warning "-Wimplicit-retain-self"
+			
+			LogVerbose(@"dispatch_release(writeTimer)");
+			dispatch_release(theWriteTimer);
+			
+		#pragma clang diagnostic pop
+		});
+		#endif
+		
+		dispatch_time_t tt = dispatch_time(DISPATCH_TIME_NOW, (int64_t)(timeout * NSEC_PER_SEC));
+		
+		dispatch_source_set_timer(writeTimer, tt, DISPATCH_TIME_FOREVER, 0);
+		dispatch_resume(writeTimer);
+	}
+}
+
+- (void)doWriteTimeout
+{
+	// This is a little bit tricky.
+	// Ideally we'd like to synchronously query the delegate about a timeout extension.
+	// But if we do so synchronously we risk a possible deadlock.
+	// So instead we have to do so asynchronously, and callback to ourselves from within the delegate block.
+	
+	flags |= kWritesPaused;
+	
+	__strong id theDelegate = delegate;
+
+	if (delegateQueue && [theDelegate respondsToSelector:@selector(socket:shouldTimeoutWriteWithTag:elapsed:bytesDone:)])
+	{
+		GCDAsyncWritePacket *theWrite = currentWrite;
+		
+		dispatch_async(delegateQueue, ^{ @autoreleasepool {
+			
+			NSTimeInterval timeoutExtension = 0.0;
+			
+			timeoutExtension = [theDelegate socket:self shouldTimeoutWriteWithTag:theWrite->tag
+			                                                              elapsed:theWrite->timeout
+			                                                            bytesDone:theWrite->bytesDone];
+			
+            dispatch_async(self->socketQueue, ^{ @autoreleasepool {
+				
+				[self doWriteTimeoutWithExtension:timeoutExtension];
+			}});
+		}});
+	}
+	else
+	{
+		[self doWriteTimeoutWithExtension:0.0];
+	}
+}
+
+- (void)doWriteTimeoutWithExtension:(NSTimeInterval)timeoutExtension
+{
+	if (currentWrite)
+	{
+		if (timeoutExtension > 0.0)
+		{
+			currentWrite->timeout += timeoutExtension;
+			
+			// Reschedule the timer
+			dispatch_time_t tt = dispatch_time(DISPATCH_TIME_NOW, (int64_t)(timeoutExtension * NSEC_PER_SEC));
+			dispatch_source_set_timer(writeTimer, tt, DISPATCH_TIME_FOREVER, 0);
+			
+			// Unpause writes, and continue
+			flags &= ~kWritesPaused;
+			[self doWriteData];
+		}
+		else
+		{
+			LogVerbose(@"WriteTimeout");
+			
+			[self closeWithError:[self writeTimeoutError]];
+		}
+	}
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+#pragma mark Security
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+- (void)startTLS:(NSDictionary *)tlsSettings
+{
+	LogTrace();
+	
+	if (tlsSettings == nil)
+    {
+        // Passing nil/NULL to CFReadStreamSetProperty will appear to work the same as passing an empty dictionary,
+        // but causes problems if we later try to fetch the remote host's certificate.
+        // 
+        // To be exact, it causes the following to return NULL instead of the normal result:
+        // CFReadStreamCopyProperty(readStream, kCFStreamPropertySSLPeerCertificates)
+        // 
+        // So we use an empty dictionary instead, which works perfectly.
+        
+        tlsSettings = [NSDictionary dictionary];
+    }
+	
+	GCDAsyncSpecialPacket *packet = [[GCDAsyncSpecialPacket alloc] initWithTLSSettings:tlsSettings];
+	
+	dispatch_async(socketQueue, ^{ @autoreleasepool {
+		
+        if ((self->flags & kSocketStarted) && !(self->flags & kQueuedTLS) && !(self->flags & kForbidReadsWrites))
+		{
+            [self->readQueue addObject:packet];
+            [self->writeQueue addObject:packet];
+			
+            self->flags |= kQueuedTLS;
+			
+			[self maybeDequeueRead];
+			[self maybeDequeueWrite];
+		}
+	}});
+	
+}
+
+- (void)maybeStartTLS
+{
+	// We can't start TLS until:
+	// - All queued reads prior to the user calling startTLS are complete
+	// - All queued writes prior to the user calling startTLS are complete
+	// 
+	// We'll know these conditions are met when both kStartingReadTLS and kStartingWriteTLS are set
+	
+	if ((flags & kStartingReadTLS) && (flags & kStartingWriteTLS))
+	{
+		BOOL useSecureTransport = YES;
+		
+		#if TARGET_OS_IPHONE
+		{
+			GCDAsyncSpecialPacket *tlsPacket = (GCDAsyncSpecialPacket *)currentRead;
+            NSDictionary *tlsSettings = @{};
+            if (tlsPacket) {
+                tlsSettings = tlsPacket->tlsSettings;
+            }
+			NSNumber *value = [tlsSettings objectForKey:GCDAsyncSocketUseCFStreamForTLS];
+			if (value && [value boolValue])
+				useSecureTransport = NO;
+		}
+		#endif
+		
+		if (useSecureTransport)
+		{
+			[self ssl_startTLS];
+		}
+		else
+		{
+		#if TARGET_OS_IPHONE
+			[self cf_startTLS];
+		#endif
+		}
+	}
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+#pragma mark Security via SecureTransport
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+- (OSStatus)sslReadWithBuffer:(void *)buffer length:(size_t *)bufferLength
+{
+	LogVerbose(@"sslReadWithBuffer:%p length:%lu", buffer, (unsigned long)*bufferLength);
+	
+	if ((socketFDBytesAvailable == 0) && ([sslPreBuffer availableBytes] == 0))
+	{
+		LogVerbose(@"%@ - No data available to read...", THIS_METHOD);
+		
+		// No data available to read.
+		// 
+		// Need to wait for readSource to fire and notify us of
+		// available data in the socket's internal read buffer.
+		
+		[self resumeReadSource];
+		
+		*bufferLength = 0;
+		return errSSLWouldBlock;
+	}
+	
+	size_t totalBytesRead = 0;
+	size_t totalBytesLeftToBeRead = *bufferLength;
+	
+	BOOL done = NO;
+	BOOL socketError = NO;
+	
+	// 
+	// STEP 1 : READ FROM SSL PRE BUFFER
+	// 
+	
+	size_t sslPreBufferLength = [sslPreBuffer availableBytes];
+	
+	if (sslPreBufferLength > 0)
+	{
+		LogVerbose(@"%@: Reading from SSL pre buffer...", THIS_METHOD);
+		
+		size_t bytesToCopy;
+		if (sslPreBufferLength > totalBytesLeftToBeRead)
+			bytesToCopy = totalBytesLeftToBeRead;
+		else
+			bytesToCopy = sslPreBufferLength;
+		
+		LogVerbose(@"%@: Copying %zu bytes from sslPreBuffer", THIS_METHOD, bytesToCopy);
+		
+		memcpy(buffer, [sslPreBuffer readBuffer], bytesToCopy);
+		[sslPreBuffer didRead:bytesToCopy];
+		
+		LogVerbose(@"%@: sslPreBuffer.length = %zu", THIS_METHOD, [sslPreBuffer availableBytes]);
+		
+		totalBytesRead += bytesToCopy;
+		totalBytesLeftToBeRead -= bytesToCopy;
+		
+		done = (totalBytesLeftToBeRead == 0);
+		
+		if (done) LogVerbose(@"%@: Complete", THIS_METHOD);
+	}
+	
+	// 
+	// STEP 2 : READ FROM SOCKET
+	// 
+	
+	if (!done && (socketFDBytesAvailable > 0))
+	{
+		LogVerbose(@"%@: Reading from socket...", THIS_METHOD);
+		
+		int socketFD = (socket4FD != SOCKET_NULL) ? socket4FD : (socket6FD != SOCKET_NULL) ? socket6FD : socketUN;
+		
+		BOOL readIntoPreBuffer;
+		size_t bytesToRead;
+		uint8_t *buf;
+		
+		if (socketFDBytesAvailable > totalBytesLeftToBeRead)
+		{
+			// Read all available data from socket into sslPreBuffer.
+			// Then copy requested amount into dataBuffer.
+			
+			LogVerbose(@"%@: Reading into sslPreBuffer...", THIS_METHOD);
+			
+			[sslPreBuffer ensureCapacityForWrite:socketFDBytesAvailable];
+			
+			readIntoPreBuffer = YES;
+			bytesToRead = (size_t)socketFDBytesAvailable;
+			buf = [sslPreBuffer writeBuffer];
+		}
+		else
+		{
+			// Read available data from socket directly into dataBuffer.
+			
+			LogVerbose(@"%@: Reading directly into dataBuffer...", THIS_METHOD);
+			
+			readIntoPreBuffer = NO;
+			bytesToRead = totalBytesLeftToBeRead;
+			buf = (uint8_t *)buffer + totalBytesRead;
+		}
+		
+		ssize_t result = read(socketFD, buf, bytesToRead);
+		LogVerbose(@"%@: read from socket = %zd", THIS_METHOD, result);
+		
+		if (result < 0)
+		{
+			LogVerbose(@"%@: read errno = %i", THIS_METHOD, errno);
+			
+			if (errno != EWOULDBLOCK)
+			{
+				socketError = YES;
+			}
+			
+			socketFDBytesAvailable = 0;
+		}
+		else if (result == 0)
+		{
+			LogVerbose(@"%@: read EOF", THIS_METHOD);
+			
+			socketError = YES;
+			socketFDBytesAvailable = 0;
+		}
+		else
+		{
+			size_t bytesReadFromSocket = result;
+			
+			if (socketFDBytesAvailable > bytesReadFromSocket)
+				socketFDBytesAvailable -= bytesReadFromSocket;
+			else
+				socketFDBytesAvailable = 0;
+			
+			if (readIntoPreBuffer)
+			{
+				[sslPreBuffer didWrite:bytesReadFromSocket];
+				
+				size_t bytesToCopy = MIN(totalBytesLeftToBeRead, bytesReadFromSocket);
+				
+				LogVerbose(@"%@: Copying %zu bytes out of sslPreBuffer", THIS_METHOD, bytesToCopy);
+				
+				memcpy((uint8_t *)buffer + totalBytesRead, [sslPreBuffer readBuffer], bytesToCopy);
+				[sslPreBuffer didRead:bytesToCopy];
+				
+				totalBytesRead += bytesToCopy;
+				totalBytesLeftToBeRead -= bytesToCopy;
+				
+				LogVerbose(@"%@: sslPreBuffer.length = %zu", THIS_METHOD, [sslPreBuffer availableBytes]);
+			}
+			else
+			{
+				totalBytesRead += bytesReadFromSocket;
+				totalBytesLeftToBeRead -= bytesReadFromSocket;
+			}
+			
+			done = (totalBytesLeftToBeRead == 0);
+			
+			if (done) LogVerbose(@"%@: Complete", THIS_METHOD);
+		}
+	}
+	
+	*bufferLength = totalBytesRead;
+	
+	if (done)
+		return noErr;
+	
+	if (socketError)
+		return errSSLClosedAbort;
+	
+	return errSSLWouldBlock;
+}
+
+- (OSStatus)sslWriteWithBuffer:(const void *)buffer length:(size_t *)bufferLength
+{
+	if (!(flags & kSocketCanAcceptBytes))
+	{
+		// Unable to write.
+		// 
+		// Need to wait for writeSource to fire and notify us of
+		// available space in the socket's internal write buffer.
+		
+		[self resumeWriteSource];
+		
+		*bufferLength = 0;
+		return errSSLWouldBlock;
+	}
+	
+	size_t bytesToWrite = *bufferLength;
+	size_t bytesWritten = 0;
+	
+	BOOL done = NO;
+	BOOL socketError = NO;
+	
+	int socketFD = (socket4FD != SOCKET_NULL) ? socket4FD : (socket6FD != SOCKET_NULL) ? socket6FD : socketUN;
+	
+	ssize_t result = write(socketFD, buffer, bytesToWrite);
+	
+	if (result < 0)
+	{
+		if (errno != EWOULDBLOCK)
+		{
+			socketError = YES;
+		}
+		
+		flags &= ~kSocketCanAcceptBytes;
+	}
+	else if (result == 0)
+	{
+		flags &= ~kSocketCanAcceptBytes;
+	}
+	else
+	{
+		bytesWritten = result;
+		
+		done = (bytesWritten == bytesToWrite);
+	}
+	
+	*bufferLength = bytesWritten;
+	
+	if (done)
+		return noErr;
+	
+	if (socketError)
+		return errSSLClosedAbort;
+	
+	return errSSLWouldBlock;
+}
+
+static OSStatus SSLReadFunction(SSLConnectionRef connection, void *data, size_t *dataLength)
+{
+	GCDAsyncSocket *asyncSocket = (__bridge GCDAsyncSocket *)connection;
+	
+	NSCAssert(dispatch_get_specific(asyncSocket->IsOnSocketQueueOrTargetQueueKey), @"What the deuce?");
+	
+	return [asyncSocket sslReadWithBuffer:data length:dataLength];
+}
+
+static OSStatus SSLWriteFunction(SSLConnectionRef connection, const void *data, size_t *dataLength)
+{
+	GCDAsyncSocket *asyncSocket = (__bridge GCDAsyncSocket *)connection;
+	
+	NSCAssert(dispatch_get_specific(asyncSocket->IsOnSocketQueueOrTargetQueueKey), @"What the deuce?");
+	
+	return [asyncSocket sslWriteWithBuffer:data length:dataLength];
+}
+
+- (void)ssl_startTLS
+{
+	LogTrace();
+	
+	LogVerbose(@"Starting TLS (via SecureTransport)...");
+	
+	OSStatus status;
+	
+	GCDAsyncSpecialPacket *tlsPacket = (GCDAsyncSpecialPacket *)currentRead;
+	if (tlsPacket == nil) // Code to quiet the analyzer
+	{
+		NSAssert(NO, @"Logic error");
+		
+		[self closeWithError:[self otherError:@"Logic error"]];
+		return;
+	}
+	NSDictionary *tlsSettings = tlsPacket->tlsSettings;
+	
+	// Create SSLContext, and setup IO callbacks and connection ref
+	
+	BOOL isServer = [[tlsSettings objectForKey:(__bridge NSString *)kCFStreamSSLIsServer] boolValue];
+	
+	#if TARGET_OS_IPHONE || (__MAC_OS_X_VERSION_MIN_REQUIRED >= 1080)
+	{
+		if (isServer)
+			sslContext = SSLCreateContext(kCFAllocatorDefault, kSSLServerSide, kSSLStreamType);
+		else
+			sslContext = SSLCreateContext(kCFAllocatorDefault, kSSLClientSide, kSSLStreamType);
+		
+		if (sslContext == NULL)
+		{
+			[self closeWithError:[self otherError:@"Error in SSLCreateContext"]];
+			return;
+		}
+	}
+	#else // (__MAC_OS_X_VERSION_MIN_REQUIRED < 1080)
+	{
+		status = SSLNewContext(isServer, &sslContext);
+		if (status != noErr)
+		{
+			[self closeWithError:[self otherError:@"Error in SSLNewContext"]];
+			return;
+		}
+	}
+	#endif
+	
+	status = SSLSetIOFuncs(sslContext, &SSLReadFunction, &SSLWriteFunction);
+	if (status != noErr)
+	{
+		[self closeWithError:[self otherError:@"Error in SSLSetIOFuncs"]];
+		return;
+	}
+	
+	status = SSLSetConnection(sslContext, (__bridge SSLConnectionRef)self);
+	if (status != noErr)
+	{
+		[self closeWithError:[self otherError:@"Error in SSLSetConnection"]];
+		return;
+	}
+
+
+	BOOL shouldManuallyEvaluateTrust = [[tlsSettings objectForKey:GCDAsyncSocketManuallyEvaluateTrust] boolValue];
+	if (shouldManuallyEvaluateTrust)
+	{
+		if (isServer)
+		{
+			[self closeWithError:[self otherError:@"Manual trust validation is not supported for server sockets"]];
+			return;
+		}
+		
+		status = SSLSetSessionOption(sslContext, kSSLSessionOptionBreakOnServerAuth, true);
+		if (status != noErr)
+		{
+			[self closeWithError:[self otherError:@"Error in SSLSetSessionOption"]];
+			return;
+		}
+		
+		#if !TARGET_OS_IPHONE && (__MAC_OS_X_VERSION_MIN_REQUIRED < 1080)
+		
+		// Note from Apple's documentation:
+		//
+		// It is only necessary to call SSLSetEnableCertVerify on the Mac prior to OS X 10.8.
+		// On OS X 10.8 and later setting kSSLSessionOptionBreakOnServerAuth always disables the
+		// built-in trust evaluation. All versions of iOS behave like OS X 10.8 and thus
+		// SSLSetEnableCertVerify is not available on that platform at all.
+		
+		status = SSLSetEnableCertVerify(sslContext, NO);
+		if (status != noErr)
+		{
+			[self closeWithError:[self otherError:@"Error in SSLSetEnableCertVerify"]];
+			return;
+		}
+		
+		#endif
+	}
+
+	// Configure SSLContext from given settings
+	// 
+	// Checklist:
+	//  1. kCFStreamSSLPeerName
+	//  2. kCFStreamSSLCertificates
+	//  3. GCDAsyncSocketSSLPeerID
+	//  4. GCDAsyncSocketSSLProtocolVersionMin
+	//  5. GCDAsyncSocketSSLProtocolVersionMax
+	//  6. GCDAsyncSocketSSLSessionOptionFalseStart
+	//  7. GCDAsyncSocketSSLSessionOptionSendOneByteRecord
+	//  8. GCDAsyncSocketSSLCipherSuites
+	//  9. GCDAsyncSocketSSLDiffieHellmanParameters (Mac)
+	//
+	// Deprecated (throw error):
+	// 10. kCFStreamSSLAllowsAnyRoot
+	// 11. kCFStreamSSLAllowsExpiredRoots
+	// 12. kCFStreamSSLAllowsExpiredCertificates
+	// 13. kCFStreamSSLValidatesCertificateChain
+	// 14. kCFStreamSSLLevel
+	
+	id value;
+	
+	// 1. kCFStreamSSLPeerName
+	
+	value = [tlsSettings objectForKey:(__bridge NSString *)kCFStreamSSLPeerName];
+	if ([value isKindOfClass:[NSString class]])
+	{
+		NSString *peerName = (NSString *)value;
+		
+		const char *peer = [peerName UTF8String];
+		size_t peerLen = strlen(peer);
+		
+		status = SSLSetPeerDomainName(sslContext, peer, peerLen);
+		if (status != noErr)
+		{
+			[self closeWithError:[self otherError:@"Error in SSLSetPeerDomainName"]];
+			return;
+		}
+	}
+	else if (value)
+	{
+		NSAssert(NO, @"Invalid value for kCFStreamSSLPeerName. Value must be of type NSString.");
+		
+		[self closeWithError:[self otherError:@"Invalid value for kCFStreamSSLPeerName."]];
+		return;
+	}
+	
+	// 2. kCFStreamSSLCertificates
+	
+	value = [tlsSettings objectForKey:(__bridge NSString *)kCFStreamSSLCertificates];
+	if ([value isKindOfClass:[NSArray class]])
+	{
+		CFArrayRef certs = (__bridge CFArrayRef)value;
+		
+		status = SSLSetCertificate(sslContext, certs);
+		if (status != noErr)
+		{
+			[self closeWithError:[self otherError:@"Error in SSLSetCertificate"]];
+			return;
+		}
+	}
+	else if (value)
+	{
+		NSAssert(NO, @"Invalid value for kCFStreamSSLCertificates. Value must be of type NSArray.");
+		
+		[self closeWithError:[self otherError:@"Invalid value for kCFStreamSSLCertificates."]];
+		return;
+	}
+	
+	// 3. GCDAsyncSocketSSLPeerID
+	
+	value = [tlsSettings objectForKey:GCDAsyncSocketSSLPeerID];
+	if ([value isKindOfClass:[NSData class]])
+	{
+		NSData *peerIdData = (NSData *)value;
+		
+		status = SSLSetPeerID(sslContext, [peerIdData bytes], [peerIdData length]);
+		if (status != noErr)
+		{
+			[self closeWithError:[self otherError:@"Error in SSLSetPeerID"]];
+			return;
+		}
+	}
+	else if (value)
+	{
+		NSAssert(NO, @"Invalid value for GCDAsyncSocketSSLPeerID. Value must be of type NSData."
+		             @" (You can convert strings to data using a method like"
+		             @" [string dataUsingEncoding:NSUTF8StringEncoding])");
+		
+		[self closeWithError:[self otherError:@"Invalid value for GCDAsyncSocketSSLPeerID."]];
+		return;
+	}
+	
+	// 4. GCDAsyncSocketSSLProtocolVersionMin
+	
+	value = [tlsSettings objectForKey:GCDAsyncSocketSSLProtocolVersionMin];
+	if ([value isKindOfClass:[NSNumber class]])
+	{
+		SSLProtocol minProtocol = (SSLProtocol)[(NSNumber *)value intValue];
+		if (minProtocol != kSSLProtocolUnknown)
+		{
+			status = SSLSetProtocolVersionMin(sslContext, minProtocol);
+			if (status != noErr)
+			{
+				[self closeWithError:[self otherError:@"Error in SSLSetProtocolVersionMin"]];
+				return;
+			}
+		}
+	}
+	else if (value)
+	{
+		NSAssert(NO, @"Invalid value for GCDAsyncSocketSSLProtocolVersionMin. Value must be of type NSNumber.");
+		
+		[self closeWithError:[self otherError:@"Invalid value for GCDAsyncSocketSSLProtocolVersionMin."]];
+		return;
+	}
+	
+	// 5. GCDAsyncSocketSSLProtocolVersionMax
+	
+	value = [tlsSettings objectForKey:GCDAsyncSocketSSLProtocolVersionMax];
+	if ([value isKindOfClass:[NSNumber class]])
+	{
+		SSLProtocol maxProtocol = (SSLProtocol)[(NSNumber *)value intValue];
+		if (maxProtocol != kSSLProtocolUnknown)
+		{
+			status = SSLSetProtocolVersionMax(sslContext, maxProtocol);
+			if (status != noErr)
+			{
+				[self closeWithError:[self otherError:@"Error in SSLSetProtocolVersionMax"]];
+				return;
+			}
+		}
+	}
+	else if (value)
+	{
+		NSAssert(NO, @"Invalid value for GCDAsyncSocketSSLProtocolVersionMax. Value must be of type NSNumber.");
+		
+		[self closeWithError:[self otherError:@"Invalid value for GCDAsyncSocketSSLProtocolVersionMax."]];
+		return;
+	}
+	
+	// 6. GCDAsyncSocketSSLSessionOptionFalseStart
+	
+	value = [tlsSettings objectForKey:GCDAsyncSocketSSLSessionOptionFalseStart];
+	if ([value isKindOfClass:[NSNumber class]])
+	{
+		status = SSLSetSessionOption(sslContext, kSSLSessionOptionFalseStart, [value boolValue]);
+		if (status != noErr)
+		{
+			[self closeWithError:[self otherError:@"Error in SSLSetSessionOption (kSSLSessionOptionFalseStart)"]];
+			return;
+		}
+	}
+	else if (value)
+	{
+		NSAssert(NO, @"Invalid value for GCDAsyncSocketSSLSessionOptionFalseStart. Value must be of type NSNumber.");
+		
+		[self closeWithError:[self otherError:@"Invalid value for GCDAsyncSocketSSLSessionOptionFalseStart."]];
+		return;
+	}
+	
+	// 7. GCDAsyncSocketSSLSessionOptionSendOneByteRecord
+	
+	value = [tlsSettings objectForKey:GCDAsyncSocketSSLSessionOptionSendOneByteRecord];
+	if ([value isKindOfClass:[NSNumber class]])
+	{
+		status = SSLSetSessionOption(sslContext, kSSLSessionOptionSendOneByteRecord, [value boolValue]);
+		if (status != noErr)
+		{
+			[self closeWithError:
+			  [self otherError:@"Error in SSLSetSessionOption (kSSLSessionOptionSendOneByteRecord)"]];
+			return;
+		}
+	}
+	else if (value)
+	{
+		NSAssert(NO, @"Invalid value for GCDAsyncSocketSSLSessionOptionSendOneByteRecord."
+		             @" Value must be of type NSNumber.");
+		
+		[self closeWithError:[self otherError:@"Invalid value for GCDAsyncSocketSSLSessionOptionSendOneByteRecord."]];
+		return;
+	}
+	
+	// 8. GCDAsyncSocketSSLCipherSuites
+	
+	value = [tlsSettings objectForKey:GCDAsyncSocketSSLCipherSuites];
+	if ([value isKindOfClass:[NSArray class]])
+	{
+		NSArray *cipherSuites = (NSArray *)value;
+		NSUInteger numberCiphers = [cipherSuites count];
+		SSLCipherSuite ciphers[numberCiphers];
+		
+		NSUInteger cipherIndex;
+		for (cipherIndex = 0; cipherIndex < numberCiphers; cipherIndex++)
+		{
+			NSNumber *cipherObject = [cipherSuites objectAtIndex:cipherIndex];
+			ciphers[cipherIndex] = [cipherObject shortValue];
+		}
+		
+		status = SSLSetEnabledCiphers(sslContext, ciphers, numberCiphers);
+		if (status != noErr)
+		{
+			[self closeWithError:[self otherError:@"Error in SSLSetEnabledCiphers"]];
+			return;
+		}
+	}
+	else if (value)
+	{
+		NSAssert(NO, @"Invalid value for GCDAsyncSocketSSLCipherSuites. Value must be of type NSArray.");
+		
+		[self closeWithError:[self otherError:@"Invalid value for GCDAsyncSocketSSLCipherSuites."]];
+		return;
+	}
+	
+	// 9. GCDAsyncSocketSSLDiffieHellmanParameters
+	
+	#if !TARGET_OS_IPHONE
+	value = [tlsSettings objectForKey:GCDAsyncSocketSSLDiffieHellmanParameters];
+	if ([value isKindOfClass:[NSData class]])
+	{
+		NSData *diffieHellmanData = (NSData *)value;
+		
+		status = SSLSetDiffieHellmanParams(sslContext, [diffieHellmanData bytes], [diffieHellmanData length]);
+		if (status != noErr)
+		{
+			[self closeWithError:[self otherError:@"Error in SSLSetDiffieHellmanParams"]];
+			return;
+		}
+	}
+	else if (value)
+	{
+		NSAssert(NO, @"Invalid value for GCDAsyncSocketSSLDiffieHellmanParameters. Value must be of type NSData.");
+		
+		[self closeWithError:[self otherError:@"Invalid value for GCDAsyncSocketSSLDiffieHellmanParameters."]];
+		return;
+	}
+	#endif
+	
+	// DEPRECATED checks
+	
+	// 10. kCFStreamSSLAllowsAnyRoot
+	
+	#pragma clang diagnostic push
+	#pragma clang diagnostic ignored "-Wdeprecated-declarations"
+	value = [tlsSettings objectForKey:(__bridge NSString *)kCFStreamSSLAllowsAnyRoot];
+	#pragma clang diagnostic pop
+	if (value)
+	{
+		NSAssert(NO, @"Security option unavailable - kCFStreamSSLAllowsAnyRoot"
+		             @" - You must use manual trust evaluation");
+		
+		[self closeWithError:[self otherError:@"Security option unavailable - kCFStreamSSLAllowsAnyRoot"]];
+		return;
+	}
+	
+	// 11. kCFStreamSSLAllowsExpiredRoots
+	
+	#pragma clang diagnostic push
+	#pragma clang diagnostic ignored "-Wdeprecated-declarations"
+	value = [tlsSettings objectForKey:(__bridge NSString *)kCFStreamSSLAllowsExpiredRoots];
+	#pragma clang diagnostic pop
+	if (value)
+	{
+		NSAssert(NO, @"Security option unavailable - kCFStreamSSLAllowsExpiredRoots"
+		             @" - You must use manual trust evaluation");
+		
+		[self closeWithError:[self otherError:@"Security option unavailable - kCFStreamSSLAllowsExpiredRoots"]];
+		return;
+	}
+	
+	// 12. kCFStreamSSLValidatesCertificateChain
+	
+	#pragma clang diagnostic push
+	#pragma clang diagnostic ignored "-Wdeprecated-declarations"
+	value = [tlsSettings objectForKey:(__bridge NSString *)kCFStreamSSLValidatesCertificateChain];
+	#pragma clang diagnostic pop
+	if (value)
+	{
+		NSAssert(NO, @"Security option unavailable - kCFStreamSSLValidatesCertificateChain"
+		             @" - You must use manual trust evaluation");
+		
+		[self closeWithError:[self otherError:@"Security option unavailable - kCFStreamSSLValidatesCertificateChain"]];
+		return;
+	}
+	
+	// 13. kCFStreamSSLAllowsExpiredCertificates
+	
+	#pragma clang diagnostic push
+	#pragma clang diagnostic ignored "-Wdeprecated-declarations"
+	value = [tlsSettings objectForKey:(__bridge NSString *)kCFStreamSSLAllowsExpiredCertificates];
+	#pragma clang diagnostic pop
+	if (value)
+	{
+		NSAssert(NO, @"Security option unavailable - kCFStreamSSLAllowsExpiredCertificates"
+		             @" - You must use manual trust evaluation");
+		
+		[self closeWithError:[self otherError:@"Security option unavailable - kCFStreamSSLAllowsExpiredCertificates"]];
+		return;
+	}
+	
+	// 14. kCFStreamSSLLevel
+	
+	#pragma clang diagnostic push
+	#pragma clang diagnostic ignored "-Wdeprecated-declarations"
+	value = [tlsSettings objectForKey:(__bridge NSString *)kCFStreamSSLLevel];
+	#pragma clang diagnostic pop
+	if (value)
+	{
+		NSAssert(NO, @"Security option unavailable - kCFStreamSSLLevel"
+		             @" - You must use GCDAsyncSocketSSLProtocolVersionMin & GCDAsyncSocketSSLProtocolVersionMax");
+		
+		[self closeWithError:[self otherError:@"Security option unavailable - kCFStreamSSLLevel"]];
+		return;
+	}
+	
+	// Setup the sslPreBuffer
+	// 
+	// Any data in the preBuffer needs to be moved into the sslPreBuffer,
+	// as this data is now part of the secure read stream.
+	
+	sslPreBuffer = [[GCDAsyncSocketPreBuffer alloc] initWithCapacity:(1024 * 4)];
+	
+	size_t preBufferLength  = [preBuffer availableBytes];
+	
+	if (preBufferLength > 0)
+	{
+		[sslPreBuffer ensureCapacityForWrite:preBufferLength];
+		
+		memcpy([sslPreBuffer writeBuffer], [preBuffer readBuffer], preBufferLength);
+		[preBuffer didRead:preBufferLength];
+		[sslPreBuffer didWrite:preBufferLength];
+	}
+	
+	sslErrCode = lastSSLHandshakeError = noErr;
+	
+	// Start the SSL Handshake process
+	
+	[self ssl_continueSSLHandshake];
+}
+
+- (void)ssl_continueSSLHandshake
+{
+	LogTrace();
+	
+	// If the return value is noErr, the session is ready for normal secure communication.
+	// If the return value is errSSLWouldBlock, the SSLHandshake function must be called again.
+	// If the return value is errSSLServerAuthCompleted, we ask delegate if we should trust the
+	// server and then call SSLHandshake again to resume the handshake or close the connection
+	// errSSLPeerBadCert SSL error.
+	// Otherwise, the return value indicates an error code.
+	
+	OSStatus status = SSLHandshake(sslContext);
+	lastSSLHandshakeError = status;
+	
+	if (status == noErr)
+	{
+		LogVerbose(@"SSLHandshake complete");
+		
+		flags &= ~kStartingReadTLS;
+		flags &= ~kStartingWriteTLS;
+		
+		flags |=  kSocketSecure;
+		
+		__strong id theDelegate = delegate;
+
+		if (delegateQueue && [theDelegate respondsToSelector:@selector(socketDidSecure:)])
+		{
+			dispatch_async(delegateQueue, ^{ @autoreleasepool {
+				
+				[theDelegate socketDidSecure:self];
+			}});
+		}
+		
+		[self endCurrentRead];
+		[self endCurrentWrite];
+		
+		[self maybeDequeueRead];
+		[self maybeDequeueWrite];
+	}
+	else if (status == errSSLPeerAuthCompleted)
+	{
+		LogVerbose(@"SSLHandshake peerAuthCompleted - awaiting delegate approval");
+		
+		__block SecTrustRef trust = NULL;
+		status = SSLCopyPeerTrust(sslContext, &trust);
+		if (status != noErr)
+		{
+			[self closeWithError:[self sslError:status]];
+			return;
+		}
+		
+		int aStateIndex = stateIndex;
+		dispatch_queue_t theSocketQueue = socketQueue;
+		
+		__weak GCDAsyncSocket *weakSelf = self;
+		
+		void (^comletionHandler)(BOOL) = ^(BOOL shouldTrust){ @autoreleasepool {
+		#pragma clang diagnostic push
+		#pragma clang diagnostic warning "-Wimplicit-retain-self"
+			
+			dispatch_async(theSocketQueue, ^{ @autoreleasepool {
+				
+				if (trust) {
+					CFRelease(trust);
+					trust = NULL;
+				}
+				
+				__strong GCDAsyncSocket *strongSelf = weakSelf;
+				if (strongSelf)
+				{
+					[strongSelf ssl_shouldTrustPeer:shouldTrust stateIndex:aStateIndex];
+				}
+			}});
+			
+		#pragma clang diagnostic pop
+		}};
+		
+		__strong id theDelegate = delegate;
+		
+		if (delegateQueue && [theDelegate respondsToSelector:@selector(socket:didReceiveTrust:completionHandler:)])
+		{
+			dispatch_async(delegateQueue, ^{ @autoreleasepool {
+			
+				[theDelegate socket:self didReceiveTrust:trust completionHandler:comletionHandler];
+			}});
+		}
+		else
+		{
+			if (trust) {
+				CFRelease(trust);
+				trust = NULL;
+			}
+			
+			NSString *msg = @"GCDAsyncSocketManuallyEvaluateTrust specified in tlsSettings,"
+			                @" but delegate doesn't implement socket:shouldTrustPeer:";
+			
+			[self closeWithError:[self otherError:msg]];
+			return;
+		}
+	}
+	else if (status == errSSLWouldBlock)
+	{
+		LogVerbose(@"SSLHandshake continues...");
+		
+		// Handshake continues...
+		// 
+		// This method will be called again from doReadData or doWriteData.
+	}
+	else
+	{
+		[self closeWithError:[self sslError:status]];
+	}
+}
+
+- (void)ssl_shouldTrustPeer:(BOOL)shouldTrust stateIndex:(int)aStateIndex
+{
+	LogTrace();
+	
+	if (aStateIndex != stateIndex)
+	{
+		LogInfo(@"Ignoring ssl_shouldTrustPeer - invalid state (maybe disconnected)");
+		
+		// One of the following is true
+		// - the socket was disconnected
+		// - the startTLS operation timed out
+		// - the completionHandler was already invoked once
+		
+		return;
+	}
+	
+	// Increment stateIndex to ensure completionHandler can only be called once.
+	stateIndex++;
+	
+	if (shouldTrust)
+	{
+        NSAssert(lastSSLHandshakeError == errSSLPeerAuthCompleted, @"ssl_shouldTrustPeer called when last error is %d and not errSSLPeerAuthCompleted", (int)lastSSLHandshakeError);
+		[self ssl_continueSSLHandshake];
+	}
+	else
+	{
+		[self closeWithError:[self sslError:errSSLPeerBadCert]];
+	}
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+#pragma mark Security via CFStream
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+#if TARGET_OS_IPHONE
+
+- (void)cf_finishSSLHandshake
+{
+	LogTrace();
+	
+	if ((flags & kStartingReadTLS) && (flags & kStartingWriteTLS))
+	{
+		flags &= ~kStartingReadTLS;
+		flags &= ~kStartingWriteTLS;
+		
+		flags |= kSocketSecure;
+		
+		__strong id theDelegate = delegate;
+
+		if (delegateQueue && [theDelegate respondsToSelector:@selector(socketDidSecure:)])
+		{
+			dispatch_async(delegateQueue, ^{ @autoreleasepool {
+				
+				[theDelegate socketDidSecure:self];
+			}});
+		}
+		
+		[self endCurrentRead];
+		[self endCurrentWrite];
+		
+		[self maybeDequeueRead];
+		[self maybeDequeueWrite];
+	}
+}
+
+- (void)cf_abortSSLHandshake:(NSError *)error
+{
+	LogTrace();
+	
+	if ((flags & kStartingReadTLS) && (flags & kStartingWriteTLS))
+	{
+		flags &= ~kStartingReadTLS;
+		flags &= ~kStartingWriteTLS;
+		
+		[self closeWithError:error];
+	}
+}
+
+- (void)cf_startTLS
+{
+	LogTrace();
+	
+	LogVerbose(@"Starting TLS (via CFStream)...");
+	
+	if ([preBuffer availableBytes] > 0)
+	{
+		NSString *msg = @"Invalid TLS transition. Handshake has already been read from socket.";
+		
+		[self closeWithError:[self otherError:msg]];
+		return;
+	}
+	
+	[self suspendReadSource];
+	[self suspendWriteSource];
+	
+	socketFDBytesAvailable = 0;
+	flags &= ~kSocketCanAcceptBytes;
+	flags &= ~kSecureSocketHasBytesAvailable;
+	
+	flags |=  kUsingCFStreamForTLS;
+	
+	if (![self createReadAndWriteStream])
+	{
+		[self closeWithError:[self otherError:@"Error in CFStreamCreatePairWithSocket"]];
+		return;
+	}
+	
+	if (![self registerForStreamCallbacksIncludingReadWrite:YES])
+	{
+		[self closeWithError:[self otherError:@"Error in CFStreamSetClient"]];
+		return;
+	}
+	
+	if (![self addStreamsToRunLoop])
+	{
+		[self closeWithError:[self otherError:@"Error in CFStreamScheduleWithRunLoop"]];
+		return;
+	}
+	
+	NSAssert([currentRead isKindOfClass:[GCDAsyncSpecialPacket class]], @"Invalid read packet for startTLS");
+	NSAssert([currentWrite isKindOfClass:[GCDAsyncSpecialPacket class]], @"Invalid write packet for startTLS");
+	
+	GCDAsyncSpecialPacket *tlsPacket = (GCDAsyncSpecialPacket *)currentRead;
+	CFDictionaryRef tlsSettings = (__bridge CFDictionaryRef)tlsPacket->tlsSettings;
+	
+	// Getting an error concerning kCFStreamPropertySSLSettings ?
+	// You need to add the CFNetwork framework to your iOS application.
+	
+	BOOL r1 = CFReadStreamSetProperty(readStream, kCFStreamPropertySSLSettings, tlsSettings);
+	BOOL r2 = CFWriteStreamSetProperty(writeStream, kCFStreamPropertySSLSettings, tlsSettings);
+	
+	// For some reason, starting around the time of iOS 4.3,
+	// the first call to set the kCFStreamPropertySSLSettings will return true,
+	// but the second will return false.
+	// 
+	// Order doesn't seem to matter.
+	// So you could call CFReadStreamSetProperty and then CFWriteStreamSetProperty, or you could reverse the order.
+	// Either way, the first call will return true, and the second returns false.
+	// 
+	// Interestingly, this doesn't seem to affect anything.
+	// Which is not altogether unusual, as the documentation seems to suggest that (for many settings)
+	// setting it on one side of the stream automatically sets it for the other side of the stream.
+	// 
+	// Although there isn't anything in the documentation to suggest that the second attempt would fail.
+	// 
+	// Furthermore, this only seems to affect streams that are negotiating a security upgrade.
+	// In other words, the socket gets connected, there is some back-and-forth communication over the unsecure
+	// connection, and then a startTLS is issued.
+	// So this mostly affects newer protocols (XMPP, IMAP) as opposed to older protocols (HTTPS).
+	
+	if (!r1 && !r2) // Yes, the && is correct - workaround for apple bug.
+	{
+		[self closeWithError:[self otherError:@"Error in CFStreamSetProperty"]];
+		return;
+	}
+	
+	if (![self openStreams])
+	{
+		[self closeWithError:[self otherError:@"Error in CFStreamOpen"]];
+		return;
+	}
+	
+	LogVerbose(@"Waiting for SSL Handshake to complete...");
+}
+
+#endif
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+#pragma mark CFStream
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+#if TARGET_OS_IPHONE
+
++ (void)ignore:(id)_
+{}
+
++ (void)startCFStreamThreadIfNeeded
+{
+	LogTrace();
+	
+	static dispatch_once_t predicate;
+	dispatch_once(&predicate, ^{
+		
+		cfstreamThreadRetainCount = 0;
+		cfstreamThreadSetupQueue = dispatch_queue_create("GCDAsyncSocket-CFStreamThreadSetup", DISPATCH_QUEUE_SERIAL);
+	});
+	
+	dispatch_sync(cfstreamThreadSetupQueue, ^{ @autoreleasepool {
+		
+		if (++cfstreamThreadRetainCount == 1)
+		{
+			cfstreamThread = [[NSThread alloc] initWithTarget:self
+			                                         selector:@selector(cfstreamThread)
+			                                           object:nil];
+			[cfstreamThread start];
+		}
+	}});
+}
+
++ (void)stopCFStreamThreadIfNeeded
+{
+	LogTrace();
+	
+	// The creation of the cfstreamThread is relatively expensive.
+	// So we'd like to keep it available for recycling.
+	// However, there's a tradeoff here, because it shouldn't remain alive forever.
+	// So what we're going to do is use a little delay before taking it down.
+	// This way it can be reused properly in situations where multiple sockets are continually in flux.
+	
+	int delayInSeconds = 30;
+	dispatch_time_t when = dispatch_time(DISPATCH_TIME_NOW, (int64_t)(delayInSeconds * NSEC_PER_SEC));
+	dispatch_after(when, cfstreamThreadSetupQueue, ^{ @autoreleasepool {
+	#pragma clang diagnostic push
+	#pragma clang diagnostic warning "-Wimplicit-retain-self"
+		
+		if (cfstreamThreadRetainCount == 0)
+		{
+			LogWarn(@"Logic error concerning cfstreamThread start / stop");
+			return_from_block;
+		}
+		
+		if (--cfstreamThreadRetainCount == 0)
+		{
+			[cfstreamThread cancel]; // set isCancelled flag
+			
+			// wake up the thread
+            [[self class] performSelector:@selector(ignore:)
+                                 onThread:cfstreamThread
+                               withObject:[NSNull null]
+                            waitUntilDone:NO];
+            
+			cfstreamThread = nil;
+		}
+		
+	#pragma clang diagnostic pop
+	}});
+}
+
++ (void)cfstreamThread { @autoreleasepool
+{
+	[[NSThread currentThread] setName:GCDAsyncSocketThreadName];
+	
+	LogInfo(@"CFStreamThread: Started");
+	
+	// We can't run the run loop unless it has an associated input source or a timer.
+	// So we'll just create a timer that will never fire - unless the server runs for decades.
+	[NSTimer scheduledTimerWithTimeInterval:[[NSDate distantFuture] timeIntervalSinceNow]
+	                                 target:self
+	                               selector:@selector(ignore:)
+	                               userInfo:nil
+	                                repeats:YES];
+	
+	NSThread *currentThread = [NSThread currentThread];
+	NSRunLoop *currentRunLoop = [NSRunLoop currentRunLoop];
+	
+	BOOL isCancelled = [currentThread isCancelled];
+	
+	while (!isCancelled && [currentRunLoop runMode:NSDefaultRunLoopMode beforeDate:[NSDate distantFuture]])
+	{
+		isCancelled = [currentThread isCancelled];
+	}
+	
+	LogInfo(@"CFStreamThread: Stopped");
+}}
+
++ (void)scheduleCFStreams:(GCDAsyncSocket *)asyncSocket
+{
+	LogTrace();
+	NSAssert([NSThread currentThread] == cfstreamThread, @"Invoked on wrong thread");
+	
+	CFRunLoopRef runLoop = CFRunLoopGetCurrent();
+	
+	if (asyncSocket->readStream)
+		CFReadStreamScheduleWithRunLoop(asyncSocket->readStream, runLoop, kCFRunLoopDefaultMode);
+	
+	if (asyncSocket->writeStream)
+		CFWriteStreamScheduleWithRunLoop(asyncSocket->writeStream, runLoop, kCFRunLoopDefaultMode);
+}
+
++ (void)unscheduleCFStreams:(GCDAsyncSocket *)asyncSocket
+{
+	LogTrace();
+	NSAssert([NSThread currentThread] == cfstreamThread, @"Invoked on wrong thread");
+	
+	CFRunLoopRef runLoop = CFRunLoopGetCurrent();
+	
+	if (asyncSocket->readStream)
+		CFReadStreamUnscheduleFromRunLoop(asyncSocket->readStream, runLoop, kCFRunLoopDefaultMode);
+	
+	if (asyncSocket->writeStream)
+		CFWriteStreamUnscheduleFromRunLoop(asyncSocket->writeStream, runLoop, kCFRunLoopDefaultMode);
+}
+
+static void CFReadStreamCallback (CFReadStreamRef stream, CFStreamEventType type, void *pInfo)
+{
+	GCDAsyncSocket *asyncSocket = (__bridge GCDAsyncSocket *)pInfo;
+	
+	switch(type)
+	{
+		case kCFStreamEventHasBytesAvailable:
+		{
+			dispatch_async(asyncSocket->socketQueue, ^{ @autoreleasepool {
+				
+				LogCVerbose(@"CFReadStreamCallback - HasBytesAvailable");
+				
+				if (asyncSocket->readStream != stream)
+					return_from_block;
+				
+				if ((asyncSocket->flags & kStartingReadTLS) && (asyncSocket->flags & kStartingWriteTLS))
+				{
+					// If we set kCFStreamPropertySSLSettings before we opened the streams, this might be a lie.
+					// (A callback related to the tcp stream, but not to the SSL layer).
+					
+					if (CFReadStreamHasBytesAvailable(asyncSocket->readStream))
+					{
+						asyncSocket->flags |= kSecureSocketHasBytesAvailable;
+						[asyncSocket cf_finishSSLHandshake];
+					}
+				}
+				else
+				{
+					asyncSocket->flags |= kSecureSocketHasBytesAvailable;
+					[asyncSocket doReadData];
+				}
+			}});
+			
+			break;
+		}
+		default:
+		{
+			NSError *error = (__bridge_transfer  NSError *)CFReadStreamCopyError(stream);
+			
+			if (error == nil && type == kCFStreamEventEndEncountered)
+			{
+				error = [asyncSocket connectionClosedError];
+			}
+			
+			dispatch_async(asyncSocket->socketQueue, ^{ @autoreleasepool {
+				
+				LogCVerbose(@"CFReadStreamCallback - Other");
+				
+				if (asyncSocket->readStream != stream)
+					return_from_block;
+				
+				if ((asyncSocket->flags & kStartingReadTLS) && (asyncSocket->flags & kStartingWriteTLS))
+				{
+					[asyncSocket cf_abortSSLHandshake:error];
+				}
+				else
+				{
+					[asyncSocket closeWithError:error];
+				}
+			}});
+			
+			break;
+		}
+	}
+	
+}
+
+static void CFWriteStreamCallback (CFWriteStreamRef stream, CFStreamEventType type, void *pInfo)
+{
+	GCDAsyncSocket *asyncSocket = (__bridge GCDAsyncSocket *)pInfo;
+	
+	switch(type)
+	{
+		case kCFStreamEventCanAcceptBytes:
+		{
+			dispatch_async(asyncSocket->socketQueue, ^{ @autoreleasepool {
+				
+				LogCVerbose(@"CFWriteStreamCallback - CanAcceptBytes");
+				
+				if (asyncSocket->writeStream != stream)
+					return_from_block;
+				
+				if ((asyncSocket->flags & kStartingReadTLS) && (asyncSocket->flags & kStartingWriteTLS))
+				{
+					// If we set kCFStreamPropertySSLSettings before we opened the streams, this might be a lie.
+					// (A callback related to the tcp stream, but not to the SSL layer).
+					
+					if (CFWriteStreamCanAcceptBytes(asyncSocket->writeStream))
+					{
+						asyncSocket->flags |= kSocketCanAcceptBytes;
+						[asyncSocket cf_finishSSLHandshake];
+					}
+				}
+				else
+				{
+					asyncSocket->flags |= kSocketCanAcceptBytes;
+					[asyncSocket doWriteData];
+				}
+			}});
+			
+			break;
+		}
+		default:
+		{
+			NSError *error = (__bridge_transfer NSError *)CFWriteStreamCopyError(stream);
+			
+			if (error == nil && type == kCFStreamEventEndEncountered)
+			{
+				error = [asyncSocket connectionClosedError];
+			}
+			
+			dispatch_async(asyncSocket->socketQueue, ^{ @autoreleasepool {
+				
+				LogCVerbose(@"CFWriteStreamCallback - Other");
+				
+				if (asyncSocket->writeStream != stream)
+					return_from_block;
+				
+				if ((asyncSocket->flags & kStartingReadTLS) && (asyncSocket->flags & kStartingWriteTLS))
+				{
+					[asyncSocket cf_abortSSLHandshake:error];
+				}
+				else
+				{
+					[asyncSocket closeWithError:error];
+				}
+			}});
+			
+			break;
+		}
+	}
+	
+}
+
+- (BOOL)createReadAndWriteStream
+{
+	LogTrace();
+	
+	NSAssert(dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey), @"Must be dispatched on socketQueue");
+	
+	
+	if (readStream || writeStream)
+	{
+		// Streams already created
+		return YES;
+	}
+	
+	int socketFD = (socket4FD != SOCKET_NULL) ? socket4FD : (socket6FD != SOCKET_NULL) ? socket6FD : socketUN;
+	
+	if (socketFD == SOCKET_NULL)
+	{
+		// Cannot create streams without a file descriptor
+		return NO;
+	}
+	
+	if (![self isConnected])
+	{
+		// Cannot create streams until file descriptor is connected
+		return NO;
+	}
+	
+	LogVerbose(@"Creating read and write stream...");
+	
+	CFStreamCreatePairWithSocket(NULL, (CFSocketNativeHandle)socketFD, &readStream, &writeStream);
+	
+	// The kCFStreamPropertyShouldCloseNativeSocket property should be false by default (for our case).
+	// But let's not take any chances.
+	
+	if (readStream)
+		CFReadStreamSetProperty(readStream, kCFStreamPropertyShouldCloseNativeSocket, kCFBooleanFalse);
+	if (writeStream)
+		CFWriteStreamSetProperty(writeStream, kCFStreamPropertyShouldCloseNativeSocket, kCFBooleanFalse);
+	
+	if ((readStream == NULL) || (writeStream == NULL))
+	{
+		LogWarn(@"Unable to create read and write stream...");
+		
+		if (readStream)
+		{
+			CFReadStreamClose(readStream);
+			CFRelease(readStream);
+			readStream = NULL;
+		}
+		if (writeStream)
+		{
+			CFWriteStreamClose(writeStream);
+			CFRelease(writeStream);
+			writeStream = NULL;
+		}
+		
+		return NO;
+	}
+	
+	return YES;
+}
+
+- (BOOL)registerForStreamCallbacksIncludingReadWrite:(BOOL)includeReadWrite
+{
+	LogVerbose(@"%@ %@", THIS_METHOD, (includeReadWrite ? @"YES" : @"NO"));
+	
+	NSAssert(dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey), @"Must be dispatched on socketQueue");
+	NSAssert((readStream != NULL && writeStream != NULL), @"Read/Write stream is null");
+	
+	streamContext.version = 0;
+	streamContext.info = (__bridge void *)(self);
+	streamContext.retain = nil;
+	streamContext.release = nil;
+	streamContext.copyDescription = nil;
+	
+	CFOptionFlags readStreamEvents = kCFStreamEventErrorOccurred | kCFStreamEventEndEncountered;
+	if (includeReadWrite)
+		readStreamEvents |= kCFStreamEventHasBytesAvailable;
+	
+	if (!CFReadStreamSetClient(readStream, readStreamEvents, &CFReadStreamCallback, &streamContext))
+	{
+		return NO;
+	}
+	
+	CFOptionFlags writeStreamEvents = kCFStreamEventErrorOccurred | kCFStreamEventEndEncountered;
+	if (includeReadWrite)
+		writeStreamEvents |= kCFStreamEventCanAcceptBytes;
+	
+	if (!CFWriteStreamSetClient(writeStream, writeStreamEvents, &CFWriteStreamCallback, &streamContext))
+	{
+		return NO;
+	}
+	
+	return YES;
+}
+
+- (BOOL)addStreamsToRunLoop
+{
+	LogTrace();
+	
+	NSAssert(dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey), @"Must be dispatched on socketQueue");
+	NSAssert((readStream != NULL && writeStream != NULL), @"Read/Write stream is null");
+	
+	if (!(flags & kAddedStreamsToRunLoop))
+	{
+		LogVerbose(@"Adding streams to runloop...");
+		
+		[[self class] startCFStreamThreadIfNeeded];
+        dispatch_sync(cfstreamThreadSetupQueue, ^{
+            [[self class] performSelector:@selector(scheduleCFStreams:)
+                                 onThread:cfstreamThread
+                               withObject:self
+                            waitUntilDone:YES];
+        });
+		flags |= kAddedStreamsToRunLoop;
+	}
+	
+	return YES;
+}
+
+- (void)removeStreamsFromRunLoop
+{
+	LogTrace();
+	
+	NSAssert(dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey), @"Must be dispatched on socketQueue");
+	NSAssert((readStream != NULL && writeStream != NULL), @"Read/Write stream is null");
+	
+	if (flags & kAddedStreamsToRunLoop)
+	{
+		LogVerbose(@"Removing streams from runloop...");
+        
+        dispatch_sync(cfstreamThreadSetupQueue, ^{
+            [[self class] performSelector:@selector(unscheduleCFStreams:)
+                                 onThread:cfstreamThread
+                               withObject:self
+                            waitUntilDone:YES];
+        });
+		[[self class] stopCFStreamThreadIfNeeded];
+		
+		flags &= ~kAddedStreamsToRunLoop;
+	}
+}
+
+- (BOOL)openStreams
+{
+	LogTrace();
+	
+	NSAssert(dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey), @"Must be dispatched on socketQueue");
+	NSAssert((readStream != NULL && writeStream != NULL), @"Read/Write stream is null");
+	
+	CFStreamStatus readStatus = CFReadStreamGetStatus(readStream);
+	CFStreamStatus writeStatus = CFWriteStreamGetStatus(writeStream);
+	
+	if ((readStatus == kCFStreamStatusNotOpen) || (writeStatus == kCFStreamStatusNotOpen))
+	{
+		LogVerbose(@"Opening read and write stream...");
+		
+		BOOL r1 = CFReadStreamOpen(readStream);
+		BOOL r2 = CFWriteStreamOpen(writeStream);
+		
+		if (!r1 || !r2)
+		{
+			LogError(@"Error in CFStreamOpen");
+			return NO;
+		}
+	}
+	
+	return YES;
+}
+
+#endif
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+#pragma mark Advanced
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+/**
+ * See header file for big discussion of this method.
+**/
+- (BOOL)autoDisconnectOnClosedReadStream
+{
+	// Note: YES means kAllowHalfDuplexConnection is OFF
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+	{
+		return ((config & kAllowHalfDuplexConnection) == 0);
+	}
+	else
+	{
+		__block BOOL result;
+		
+		dispatch_sync(socketQueue, ^{
+            result = ((self->config & kAllowHalfDuplexConnection) == 0);
+		});
+		
+		return result;
+	}
+}
+
+/**
+ * See header file for big discussion of this method.
+**/
+- (void)setAutoDisconnectOnClosedReadStream:(BOOL)flag
+{
+	// Note: YES means kAllowHalfDuplexConnection is OFF
+	
+	dispatch_block_t block = ^{
+		
+		if (flag)
+            self->config &= ~kAllowHalfDuplexConnection;
+		else
+            self->config |= kAllowHalfDuplexConnection;
+	};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_async(socketQueue, block);
+}
+
+
+/**
+ * See header file for big discussion of this method.
+**/
+- (void)markSocketQueueTargetQueue:(dispatch_queue_t)socketNewTargetQueue
+{
+	void *nonNullUnusedPointer = (__bridge void *)self;
+	dispatch_queue_set_specific(socketNewTargetQueue, IsOnSocketQueueOrTargetQueueKey, nonNullUnusedPointer, NULL);
+}
+
+/**
+ * See header file for big discussion of this method.
+**/
+- (void)unmarkSocketQueueTargetQueue:(dispatch_queue_t)socketOldTargetQueue
+{
+	dispatch_queue_set_specific(socketOldTargetQueue, IsOnSocketQueueOrTargetQueueKey, NULL, NULL);
+}
+
+/**
+ * See header file for big discussion of this method.
+**/
+- (void)performBlock:(dispatch_block_t)block
+{
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_sync(socketQueue, block);
+}
+
+/**
+ * Questions? Have you read the header file?
+**/
+- (int)socketFD
+{
+	if (!dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+	{
+		LogWarn(@"%@ - Method only available from within the context of a performBlock: invocation", THIS_METHOD);
+		return SOCKET_NULL;
+	}
+	
+	if (socket4FD != SOCKET_NULL)
+		return socket4FD;
+	else
+		return socket6FD;
+}
+
+/**
+ * Questions? Have you read the header file?
+**/
+- (int)socket4FD
+{
+	if (!dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+	{
+		LogWarn(@"%@ - Method only available from within the context of a performBlock: invocation", THIS_METHOD);
+		return SOCKET_NULL;
+	}
+	
+	return socket4FD;
+}
+
+/**
+ * Questions? Have you read the header file?
+**/
+- (int)socket6FD
+{
+	if (!dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+	{
+		LogWarn(@"%@ - Method only available from within the context of a performBlock: invocation", THIS_METHOD);
+		return SOCKET_NULL;
+	}
+	
+	return socket6FD;
+}
+
+#if TARGET_OS_IPHONE
+
+/**
+ * Questions? Have you read the header file?
+**/
+- (CFReadStreamRef)readStream
+{
+	if (!dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+	{
+		LogWarn(@"%@ - Method only available from within the context of a performBlock: invocation", THIS_METHOD);
+		return NULL;
+	}
+	
+	if (readStream == NULL)
+		[self createReadAndWriteStream];
+	
+	return readStream;
+}
+
+/**
+ * Questions? Have you read the header file?
+**/
+- (CFWriteStreamRef)writeStream
+{
+	if (!dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+	{
+		LogWarn(@"%@ - Method only available from within the context of a performBlock: invocation", THIS_METHOD);
+		return NULL;
+	}
+	
+	if (writeStream == NULL)
+		[self createReadAndWriteStream];
+	
+	return writeStream;
+}
+
+- (BOOL)enableBackgroundingOnSocketWithCaveat:(BOOL)caveat
+{
+	if (![self createReadAndWriteStream])
+	{
+		// Error occurred creating streams (perhaps socket isn't open)
+		return NO;
+	}
+	
+	BOOL r1, r2;
+	
+	LogVerbose(@"Enabling backgrouding on socket");
+	
+	r1 = CFReadStreamSetProperty(readStream, kCFStreamNetworkServiceType, kCFStreamNetworkServiceTypeVoIP);
+	r2 = CFWriteStreamSetProperty(writeStream, kCFStreamNetworkServiceType, kCFStreamNetworkServiceTypeVoIP);
+	
+	if (!r1 || !r2)
+	{
+		return NO;
+	}
+	
+	if (!caveat)
+	{
+		if (![self openStreams])
+		{
+			return NO;
+		}
+	}
+	
+	return YES;
+}
+
+/**
+ * Questions? Have you read the header file?
+**/
+- (BOOL)enableBackgroundingOnSocket
+{
+	LogTrace();
+	
+	if (!dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+	{
+		LogWarn(@"%@ - Method only available from within the context of a performBlock: invocation", THIS_METHOD);
+		return NO;
+	}
+	
+	return [self enableBackgroundingOnSocketWithCaveat:NO];
+}
+
+- (BOOL)enableBackgroundingOnSocketWithCaveat // Deprecated in iOS 4.???
+{
+	// This method was created as a workaround for a bug in iOS.
+	// Apple has since fixed this bug.
+	// I'm not entirely sure which version of iOS they fixed it in...
+	
+	LogTrace();
+	
+	if (!dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+	{
+		LogWarn(@"%@ - Method only available from within the context of a performBlock: invocation", THIS_METHOD);
+		return NO;
+	}
+	
+	return [self enableBackgroundingOnSocketWithCaveat:YES];
+}
+
+#endif
+
+- (SSLContextRef)sslContext
+{
+	if (!dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+	{
+		LogWarn(@"%@ - Method only available from within the context of a performBlock: invocation", THIS_METHOD);
+		return NULL;
+	}
+	
+	return sslContext;
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+#pragma mark Class Utilities
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
++ (NSMutableArray *)lookupHost:(NSString *)host port:(uint16_t)port error:(NSError **)errPtr
+{
+	LogTrace();
+	
+	NSMutableArray *addresses = nil;
+	NSError *error = nil;
+	
+	if ([host isEqualToString:@"localhost"] || [host isEqualToString:@"loopback"])
+	{
+		// Use LOOPBACK address
+		struct sockaddr_in nativeAddr4;
+		nativeAddr4.sin_len         = sizeof(struct sockaddr_in);
+		nativeAddr4.sin_family      = AF_INET;
+		nativeAddr4.sin_port        = htons(port);
+		nativeAddr4.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
+		memset(&(nativeAddr4.sin_zero), 0, sizeof(nativeAddr4.sin_zero));
+		
+		struct sockaddr_in6 nativeAddr6;
+		nativeAddr6.sin6_len        = sizeof(struct sockaddr_in6);
+		nativeAddr6.sin6_family     = AF_INET6;
+		nativeAddr6.sin6_port       = htons(port);
+		nativeAddr6.sin6_flowinfo   = 0;
+		nativeAddr6.sin6_addr       = in6addr_loopback;
+		nativeAddr6.sin6_scope_id   = 0;
+		
+		// Wrap the native address structures
+		
+		NSData *address4 = [NSData dataWithBytes:&nativeAddr4 length:sizeof(nativeAddr4)];
+		NSData *address6 = [NSData dataWithBytes:&nativeAddr6 length:sizeof(nativeAddr6)];
+		
+		addresses = [NSMutableArray arrayWithCapacity:2];
+		[addresses addObject:address4];
+		[addresses addObject:address6];
+	}
+	else
+	{
+		NSString *portStr = [NSString stringWithFormat:@"%hu", port];
+		
+		struct addrinfo hints, *res, *res0;
+		
+		memset(&hints, 0, sizeof(hints));
+		hints.ai_family   = PF_UNSPEC;
+		hints.ai_socktype = SOCK_STREAM;
+		hints.ai_protocol = IPPROTO_TCP;
+		
+		int gai_error = getaddrinfo([host UTF8String], [portStr UTF8String], &hints, &res0);
+		
+		if (gai_error)
+		{
+			error = [self gaiError:gai_error];
+		}
+		else
+		{
+			NSUInteger capacity = 0;
+			for (res = res0; res; res = res->ai_next)
+			{
+				if (res->ai_family == AF_INET || res->ai_family == AF_INET6) {
+					capacity++;
+				}
+			}
+			
+			addresses = [NSMutableArray arrayWithCapacity:capacity];
+			
+			for (res = res0; res; res = res->ai_next)
+			{
+				if (res->ai_family == AF_INET)
+				{
+					// Found IPv4 address.
+					// Wrap the native address structure, and add to results.
+					
+					NSData *address4 = [NSData dataWithBytes:res->ai_addr length:res->ai_addrlen];
+					[addresses addObject:address4];
+				}
+				else if (res->ai_family == AF_INET6)
+				{
+					// Fixes connection issues with IPv6
+					// https://github.com/robbiehanson/CocoaAsyncSocket/issues/429#issuecomment-222477158
+					
+					// Found IPv6 address.
+					// Wrap the native address structure, and add to results.
+					
+					struct sockaddr_in6 *sockaddr = (struct sockaddr_in6 *)res->ai_addr;
+					in_port_t *portPtr = &sockaddr->sin6_port;
+					if ((portPtr != NULL) && (*portPtr == 0)) {
+					        *portPtr = htons(port);
+					}
+
+					NSData *address6 = [NSData dataWithBytes:res->ai_addr length:res->ai_addrlen];
+					[addresses addObject:address6];
+				}
+			}
+			freeaddrinfo(res0);
+			
+			if ([addresses count] == 0)
+			{
+				error = [self gaiError:EAI_FAIL];
+			}
+		}
+	}
+	
+	if (errPtr) *errPtr = error;
+	return addresses;
+}
+
++ (NSString *)hostFromSockaddr4:(const struct sockaddr_in *)pSockaddr4
+{
+	char addrBuf[INET_ADDRSTRLEN];
+	
+	if (inet_ntop(AF_INET, &pSockaddr4->sin_addr, addrBuf, (socklen_t)sizeof(addrBuf)) == NULL)
+	{
+		addrBuf[0] = '\0';
+	}
+	
+	return [NSString stringWithCString:addrBuf encoding:NSASCIIStringEncoding];
+}
+
++ (NSString *)hostFromSockaddr6:(const struct sockaddr_in6 *)pSockaddr6
+{
+	char addrBuf[INET6_ADDRSTRLEN];
+	
+	if (inet_ntop(AF_INET6, &pSockaddr6->sin6_addr, addrBuf, (socklen_t)sizeof(addrBuf)) == NULL)
+	{
+		addrBuf[0] = '\0';
+	}
+	
+	return [NSString stringWithCString:addrBuf encoding:NSASCIIStringEncoding];
+}
+
++ (uint16_t)portFromSockaddr4:(const struct sockaddr_in *)pSockaddr4
+{
+	return ntohs(pSockaddr4->sin_port);
+}
+
++ (uint16_t)portFromSockaddr6:(const struct sockaddr_in6 *)pSockaddr6
+{
+	return ntohs(pSockaddr6->sin6_port);
+}
+
++ (NSURL *)urlFromSockaddrUN:(const struct sockaddr_un *)pSockaddr
+{
+	NSString *path = [NSString stringWithUTF8String:pSockaddr->sun_path];
+	return [NSURL fileURLWithPath:path];
+}
+
++ (NSString *)hostFromAddress:(NSData *)address
+{
+	NSString *host;
+	
+	if ([self getHost:&host port:NULL fromAddress:address])
+		return host;
+	else
+		return nil;
+}
+
++ (uint16_t)portFromAddress:(NSData *)address
+{
+	uint16_t port;
+	
+	if ([self getHost:NULL port:&port fromAddress:address])
+		return port;
+	else
+		return 0;
+}
+
++ (BOOL)isIPv4Address:(NSData *)address
+{
+	if ([address length] >= sizeof(struct sockaddr))
+	{
+		const struct sockaddr *sockaddrX = [address bytes];
+		
+		if (sockaddrX->sa_family == AF_INET) {
+			return YES;
+		}
+	}
+	
+	return NO;
+}
+
++ (BOOL)isIPv6Address:(NSData *)address
+{
+	if ([address length] >= sizeof(struct sockaddr))
+	{
+		const struct sockaddr *sockaddrX = [address bytes];
+		
+		if (sockaddrX->sa_family == AF_INET6) {
+			return YES;
+		}
+	}
+	
+	return NO;
+}
+
++ (BOOL)getHost:(NSString **)hostPtr port:(uint16_t *)portPtr fromAddress:(NSData *)address
+{
+	return [self getHost:hostPtr port:portPtr family:NULL fromAddress:address];
+}
+
++ (BOOL)getHost:(NSString **)hostPtr port:(uint16_t *)portPtr family:(sa_family_t *)afPtr fromAddress:(NSData *)address
+{
+	if ([address length] >= sizeof(struct sockaddr))
+	{
+		const struct sockaddr *sockaddrX = [address bytes];
+		
+		if (sockaddrX->sa_family == AF_INET)
+		{
+			if ([address length] >= sizeof(struct sockaddr_in))
+			{
+				struct sockaddr_in sockaddr4;
+				memcpy(&sockaddr4, sockaddrX, sizeof(sockaddr4));
+				
+				if (hostPtr) *hostPtr = [self hostFromSockaddr4:&sockaddr4];
+				if (portPtr) *portPtr = [self portFromSockaddr4:&sockaddr4];
+				if (afPtr)   *afPtr   = AF_INET;
+				
+				return YES;
+			}
+		}
+		else if (sockaddrX->sa_family == AF_INET6)
+		{
+			if ([address length] >= sizeof(struct sockaddr_in6))
+			{
+				struct sockaddr_in6 sockaddr6;
+				memcpy(&sockaddr6, sockaddrX, sizeof(sockaddr6));
+				
+				if (hostPtr) *hostPtr = [self hostFromSockaddr6:&sockaddr6];
+				if (portPtr) *portPtr = [self portFromSockaddr6:&sockaddr6];
+				if (afPtr)   *afPtr   = AF_INET6;
+				
+				return YES;
+			}
+		}
+	}
+	
+	return NO;
+}
+
++ (NSData *)CRLFData
+{
+	return [NSData dataWithBytes:"\x0D\x0A" length:2];
+}
+
++ (NSData *)CRData
+{
+	return [NSData dataWithBytes:"\x0D" length:1];
+}
+
++ (NSData *)LFData
+{
+	return [NSData dataWithBytes:"\x0A" length:1];
+}
+
++ (NSData *)ZeroData
+{
+	return [NSData dataWithBytes:"" length:1];
+}
+
+@end	
diff --git a/Pods/CocoaAsyncSocket/Source/GCD/GCDAsyncUdpSocket.h b/Pods/CocoaAsyncSocket/Source/GCD/GCDAsyncUdpSocket.h
new file mode 100644
index 0000000..b0b244d
--- /dev/null
+++ b/Pods/CocoaAsyncSocket/Source/GCD/GCDAsyncUdpSocket.h
@@ -0,0 +1,1024 @@
+//  
+//  GCDAsyncUdpSocket
+//  
+//  This class is in the public domain.
+//  Originally created by Robbie Hanson of Deusty LLC.
+//  Updated and maintained by Deusty LLC and the Apple development community.
+//  
+//  https://github.com/robbiehanson/CocoaAsyncSocket
+//
+
+#import <Foundation/Foundation.h>
+#import <dispatch/dispatch.h>
+#import <TargetConditionals.h>
+#import <Availability.h>
+
+NS_ASSUME_NONNULL_BEGIN
+extern NSString *const GCDAsyncUdpSocketException;
+extern NSString *const GCDAsyncUdpSocketErrorDomain;
+
+extern NSString *const GCDAsyncUdpSocketQueueName;
+extern NSString *const GCDAsyncUdpSocketThreadName;
+
+typedef NS_ENUM(NSInteger, GCDAsyncUdpSocketError) {
+	GCDAsyncUdpSocketNoError = 0,          // Never used
+	GCDAsyncUdpSocketBadConfigError,       // Invalid configuration
+	GCDAsyncUdpSocketBadParamError,        // Invalid parameter was passed
+	GCDAsyncUdpSocketSendTimeoutError,     // A send operation timed out
+	GCDAsyncUdpSocketClosedError,          // The socket was closed
+	GCDAsyncUdpSocketOtherError,           // Description provided in userInfo
+};
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+#pragma mark -
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+@class GCDAsyncUdpSocket;
+
+@protocol GCDAsyncUdpSocketDelegate <NSObject>
+@optional
+
+/**
+ * By design, UDP is a connectionless protocol, and connecting is not needed.
+ * However, you may optionally choose to connect to a particular host for reasons
+ * outlined in the documentation for the various connect methods listed above.
+ * 
+ * This method is called if one of the connect methods are invoked, and the connection is successful.
+**/
+- (void)udpSocket:(GCDAsyncUdpSocket *)sock didConnectToAddress:(NSData *)address;
+
+/**
+ * By design, UDP is a connectionless protocol, and connecting is not needed.
+ * However, you may optionally choose to connect to a particular host for reasons
+ * outlined in the documentation for the various connect methods listed above.
+ * 
+ * This method is called if one of the connect methods are invoked, and the connection fails.
+ * This may happen, for example, if a domain name is given for the host and the domain name is unable to be resolved.
+**/
+- (void)udpSocket:(GCDAsyncUdpSocket *)sock didNotConnect:(NSError * _Nullable)error;
+
+/**
+ * Called when the datagram with the given tag has been sent.
+**/
+- (void)udpSocket:(GCDAsyncUdpSocket *)sock didSendDataWithTag:(long)tag;
+
+/**
+ * Called if an error occurs while trying to send a datagram.
+ * This could be due to a timeout, or something more serious such as the data being too large to fit in a sigle packet.
+**/
+- (void)udpSocket:(GCDAsyncUdpSocket *)sock didNotSendDataWithTag:(long)tag dueToError:(NSError * _Nullable)error;
+
+/**
+ * Called when the socket has received the requested datagram.
+**/
+- (void)udpSocket:(GCDAsyncUdpSocket *)sock didReceiveData:(NSData *)data
+                                             fromAddress:(NSData *)address
+                                       withFilterContext:(nullable id)filterContext;
+
+/**
+ * Called when the socket is closed.
+**/
+- (void)udpSocketDidClose:(GCDAsyncUdpSocket *)sock withError:(NSError  * _Nullable)error;
+
+@end
+
+/**
+ * You may optionally set a receive filter for the socket.
+ * A filter can provide several useful features:
+ *    
+ * 1. Many times udp packets need to be parsed.
+ *    Since the filter can run in its own independent queue, you can parallelize this parsing quite easily.
+ *    The end result is a parallel socket io, datagram parsing, and packet processing.
+ * 
+ * 2. Many times udp packets are discarded because they are duplicate/unneeded/unsolicited.
+ *    The filter can prevent such packets from arriving at the delegate.
+ *    And because the filter can run in its own independent queue, this doesn't slow down the delegate.
+ * 
+ *    - Since the udp protocol does not guarantee delivery, udp packets may be lost.
+ *      Many protocols built atop udp thus provide various resend/re-request algorithms.
+ *      This sometimes results in duplicate packets arriving.
+ *      A filter may allow you to architect the duplicate detection code to run in parallel to normal processing.
+ *    
+ *    - Since the udp socket may be connectionless, its possible for unsolicited packets to arrive.
+ *      Such packets need to be ignored.
+ * 
+ * 3. Sometimes traffic shapers are needed to simulate real world environments.
+ *    A filter allows you to write custom code to simulate such environments.
+ *    The ability to code this yourself is especially helpful when your simulated environment
+ *    is more complicated than simple traffic shaping (e.g. simulating a cone port restricted router),
+ *    or the system tools to handle this aren't available (e.g. on a mobile device).
+ * 
+ * @param data    - The packet that was received.
+ * @param address - The address the data was received from.
+ *                  See utilities section for methods to extract info from address.
+ * @param context - Out parameter you may optionally set, which will then be passed to the delegate method.
+ *                  For example, filter block can parse the data and then,
+ *                  pass the parsed data to the delegate.
+ * 
+ * @returns - YES if the received packet should be passed onto the delegate.
+ *            NO if the received packet should be discarded, and not reported to the delegete.
+ * 
+ * Example:
+ * 
+ * GCDAsyncUdpSocketReceiveFilterBlock filter = ^BOOL (NSData *data, NSData *address, id *context) {
+ * 
+ *     MyProtocolMessage *msg = [MyProtocol parseMessage:data];
+ *     
+ *     *context = response;
+ *     return (response != nil);
+ * };
+ * [udpSocket setReceiveFilter:filter withQueue:myParsingQueue];
+ * 
+**/
+typedef BOOL (^GCDAsyncUdpSocketReceiveFilterBlock)(NSData *data, NSData *address, id __nullable * __nonnull context);
+
+/**
+ * You may optionally set a send filter for the socket.
+ * A filter can provide several interesting possibilities:
+ * 
+ * 1. Optional caching of resolved addresses for domain names.
+ *    The cache could later be consulted, resulting in fewer system calls to getaddrinfo.
+ * 
+ * 2. Reusable modules of code for bandwidth monitoring.
+ * 
+ * 3. Sometimes traffic shapers are needed to simulate real world environments.
+ *    A filter allows you to write custom code to simulate such environments.
+ *    The ability to code this yourself is especially helpful when your simulated environment
+ *    is more complicated than simple traffic shaping (e.g. simulating a cone port restricted router),
+ *    or the system tools to handle this aren't available (e.g. on a mobile device).
+ * 
+ * @param data    - The packet that was received.
+ * @param address - The address the data was received from.
+ *                  See utilities section for methods to extract info from address.
+ * @param tag     - The tag that was passed in the send method.
+ * 
+ * @returns - YES if the packet should actually be sent over the socket.
+ *            NO if the packet should be silently dropped (not sent over the socket).
+ * 
+ * Regardless of the return value, the delegate will be informed that the packet was successfully sent.
+ *
+**/
+typedef BOOL (^GCDAsyncUdpSocketSendFilterBlock)(NSData *data, NSData *address, long tag);
+
+
+@interface GCDAsyncUdpSocket : NSObject
+
+/**
+ * GCDAsyncUdpSocket uses the standard delegate paradigm,
+ * but executes all delegate callbacks on a given delegate dispatch queue.
+ * This allows for maximum concurrency, while at the same time providing easy thread safety.
+ * 
+ * You MUST set a delegate AND delegate dispatch queue before attempting to
+ * use the socket, or you will get an error.
+ * 
+ * The socket queue is optional.
+ * If you pass NULL, GCDAsyncSocket will automatically create its own socket queue.
+ * If you choose to provide a socket queue, the socket queue must not be a concurrent queue,
+ * then please see the discussion for the method markSocketQueueTargetQueue.
+ *
+ * The delegate queue and socket queue can optionally be the same.
+**/
+- (instancetype)init;
+- (instancetype)initWithSocketQueue:(nullable dispatch_queue_t)sq;
+- (instancetype)initWithDelegate:(nullable id <GCDAsyncUdpSocketDelegate>)aDelegate delegateQueue:(nullable dispatch_queue_t)dq;
+- (instancetype)initWithDelegate:(nullable id <GCDAsyncUdpSocketDelegate>)aDelegate delegateQueue:(nullable dispatch_queue_t)dq socketQueue:(nullable dispatch_queue_t)sq;
+
+#pragma mark Configuration
+
+- (nullable id <GCDAsyncUdpSocketDelegate>)delegate;
+- (void)setDelegate:(nullable id <GCDAsyncUdpSocketDelegate>)delegate;
+- (void)synchronouslySetDelegate:(nullable id <GCDAsyncUdpSocketDelegate>)delegate;
+
+- (nullable dispatch_queue_t)delegateQueue;
+- (void)setDelegateQueue:(nullable dispatch_queue_t)delegateQueue;
+- (void)synchronouslySetDelegateQueue:(nullable dispatch_queue_t)delegateQueue;
+
+- (void)getDelegate:(id <GCDAsyncUdpSocketDelegate> __nullable * __nullable)delegatePtr delegateQueue:(dispatch_queue_t __nullable * __nullable)delegateQueuePtr;
+- (void)setDelegate:(nullable id <GCDAsyncUdpSocketDelegate>)delegate delegateQueue:(nullable dispatch_queue_t)delegateQueue;
+- (void)synchronouslySetDelegate:(nullable id <GCDAsyncUdpSocketDelegate>)delegate delegateQueue:(nullable dispatch_queue_t)delegateQueue;
+
+/**
+ * By default, both IPv4 and IPv6 are enabled.
+ * 
+ * This means GCDAsyncUdpSocket automatically supports both protocols,
+ * and can send to IPv4 or IPv6 addresses,
+ * as well as receive over IPv4 and IPv6.
+ * 
+ * For operations that require DNS resolution, GCDAsyncUdpSocket supports both IPv4 and IPv6.
+ * If a DNS lookup returns only IPv4 results, GCDAsyncUdpSocket will automatically use IPv4.
+ * If a DNS lookup returns only IPv6 results, GCDAsyncUdpSocket will automatically use IPv6.
+ * If a DNS lookup returns both IPv4 and IPv6 results, then the protocol used depends on the configured preference.
+ * If IPv4 is preferred, then IPv4 is used.
+ * If IPv6 is preferred, then IPv6 is used.
+ * If neutral, then the first IP version in the resolved array will be used.
+ * 
+ * Starting with Mac OS X 10.7 Lion and iOS 5, the default IP preference is neutral.
+ * On prior systems the default IP preference is IPv4.
+ **/
+- (BOOL)isIPv4Enabled;
+- (void)setIPv4Enabled:(BOOL)flag;
+
+- (BOOL)isIPv6Enabled;
+- (void)setIPv6Enabled:(BOOL)flag;
+
+- (BOOL)isIPv4Preferred;
+- (BOOL)isIPv6Preferred;
+- (BOOL)isIPVersionNeutral;
+
+- (void)setPreferIPv4;
+- (void)setPreferIPv6;
+- (void)setIPVersionNeutral;
+
+/**
+ * Gets/Sets the maximum size of the buffer that will be allocated for receive operations.
+ * The default maximum size is 65535 bytes.
+ * 
+ * The theoretical maximum size of any IPv4 UDP packet is UINT16_MAX = 65535.
+ * The theoretical maximum size of any IPv6 UDP packet is UINT32_MAX = 4294967295.
+ * 
+ * Since the OS/GCD notifies us of the size of each received UDP packet,
+ * the actual allocated buffer size for each packet is exact.
+ * And in practice the size of UDP packets is generally much smaller than the max.
+ * Indeed most protocols will send and receive packets of only a few bytes,
+ * or will set a limit on the size of packets to prevent fragmentation in the IP layer.
+ * 
+ * If you set the buffer size too small, the sockets API in the OS will silently discard
+ * any extra data, and you will not be notified of the error.
+**/
+- (uint16_t)maxReceiveIPv4BufferSize;
+- (void)setMaxReceiveIPv4BufferSize:(uint16_t)max;
+
+- (uint32_t)maxReceiveIPv6BufferSize;
+- (void)setMaxReceiveIPv6BufferSize:(uint32_t)max;
+
+/**
+ * Gets/Sets the maximum size of the buffer that will be allocated for send operations.
+ * The default maximum size is 65535 bytes.
+ * 
+ * Given that a typical link MTU is 1500 bytes, a large UDP datagram will have to be 
+ * fragmented, and that’s both expensive and risky (if one fragment goes missing, the
+ * entire datagram is lost).  You are much better off sending a large number of smaller
+ * UDP datagrams, preferably using a path MTU algorithm to avoid fragmentation.
+ *
+ * You must set it before the sockt is created otherwise it won't work.
+ *
+ **/
+- (uint16_t)maxSendBufferSize;
+- (void)setMaxSendBufferSize:(uint16_t)max;
+
+/**
+ * User data allows you to associate arbitrary information with the socket.
+ * This data is not used internally in any way.
+**/
+- (nullable id)userData;
+- (void)setUserData:(nullable id)arbitraryUserData;
+
+#pragma mark Diagnostics
+
+/**
+ * Returns the local address info for the socket.
+ * 
+ * The localAddress method returns a sockaddr structure wrapped in a NSData object.
+ * The localHost method returns the human readable IP address as a string.
+ * 
+ * Note: Address info may not be available until after the socket has been binded, connected
+ * or until after data has been sent.
+**/
+- (nullable NSData *)localAddress;
+- (nullable NSString *)localHost;
+- (uint16_t)localPort;
+
+- (nullable NSData *)localAddress_IPv4;
+- (nullable NSString *)localHost_IPv4;
+- (uint16_t)localPort_IPv4;
+
+- (nullable NSData *)localAddress_IPv6;
+- (nullable NSString *)localHost_IPv6;
+- (uint16_t)localPort_IPv6;
+
+/**
+ * Returns the remote address info for the socket.
+ * 
+ * The connectedAddress method returns a sockaddr structure wrapped in a NSData object.
+ * The connectedHost method returns the human readable IP address as a string.
+ * 
+ * Note: Since UDP is connectionless by design, connected address info
+ * will not be available unless the socket is explicitly connected to a remote host/port.
+ * If the socket is not connected, these methods will return nil / 0.
+**/
+- (nullable NSData *)connectedAddress;
+- (nullable NSString *)connectedHost;
+- (uint16_t)connectedPort;
+
+/**
+ * Returns whether or not this socket has been connected to a single host.
+ * By design, UDP is a connectionless protocol, and connecting is not needed.
+ * If connected, the socket will only be able to send/receive data to/from the connected host.
+**/
+- (BOOL)isConnected;
+
+/**
+ * Returns whether or not this socket has been closed.
+ * The only way a socket can be closed is if you explicitly call one of the close methods.
+**/
+- (BOOL)isClosed;
+
+/**
+ * Returns whether or not this socket is IPv4.
+ * 
+ * By default this will be true, unless:
+ * - IPv4 is disabled (via setIPv4Enabled:)
+ * - The socket is explicitly bound to an IPv6 address
+ * - The socket is connected to an IPv6 address
+**/
+- (BOOL)isIPv4;
+
+/**
+ * Returns whether or not this socket is IPv6.
+ * 
+ * By default this will be true, unless:
+ * - IPv6 is disabled (via setIPv6Enabled:)
+ * - The socket is explicitly bound to an IPv4 address
+ * _ The socket is connected to an IPv4 address
+ * 
+ * This method will also return false on platforms that do not support IPv6.
+ * Note: The iPhone does not currently support IPv6.
+**/
+- (BOOL)isIPv6;
+
+#pragma mark Binding
+
+/**
+ * Binds the UDP socket to the given port.
+ * Binding should be done for server sockets that receive data prior to sending it.
+ * Client sockets can skip binding,
+ * as the OS will automatically assign the socket an available port when it starts sending data.
+ * 
+ * You may optionally pass a port number of zero to immediately bind the socket,
+ * yet still allow the OS to automatically assign an available port.
+ * 
+ * You cannot bind a socket after its been connected.
+ * You can only bind a socket once.
+ * You can still connect a socket (if desired) after binding.
+ * 
+ * On success, returns YES.
+ * Otherwise returns NO, and sets errPtr. If you don't care about the error, you can pass NULL for errPtr.
+**/
+- (BOOL)bindToPort:(uint16_t)port error:(NSError **)errPtr;
+
+/**
+ * Binds the UDP socket to the given port and optional interface.
+ * Binding should be done for server sockets that receive data prior to sending it.
+ * Client sockets can skip binding,
+ * as the OS will automatically assign the socket an available port when it starts sending data.
+ * 
+ * You may optionally pass a port number of zero to immediately bind the socket,
+ * yet still allow the OS to automatically assign an available port.
+ * 
+ * The interface may be a name (e.g. "en1" or "lo0") or the corresponding IP address (e.g. "192.168.4.35").
+ * You may also use the special strings "localhost" or "loopback" to specify that
+ * the socket only accept packets from the local machine.
+ * 
+ * You cannot bind a socket after its been connected.
+ * You can only bind a socket once.
+ * You can still connect a socket (if desired) after binding.
+ * 
+ * On success, returns YES.
+ * Otherwise returns NO, and sets errPtr. If you don't care about the error, you can pass NULL for errPtr.
+**/
+- (BOOL)bindToPort:(uint16_t)port interface:(nullable NSString *)interface error:(NSError **)errPtr;
+
+/**
+ * Binds the UDP socket to the given address, specified as a sockaddr structure wrapped in a NSData object.
+ * 
+ * If you have an existing struct sockaddr you can convert it to a NSData object like so:
+ * struct sockaddr sa  -> NSData *dsa = [NSData dataWithBytes:&remoteAddr length:remoteAddr.sa_len];
+ * struct sockaddr *sa -> NSData *dsa = [NSData dataWithBytes:remoteAddr length:remoteAddr->sa_len];
+ * 
+ * Binding should be done for server sockets that receive data prior to sending it.
+ * Client sockets can skip binding,
+ * as the OS will automatically assign the socket an available port when it starts sending data.
+ * 
+ * You cannot bind a socket after its been connected.
+ * You can only bind a socket once.
+ * You can still connect a socket (if desired) after binding.
+ * 
+ * On success, returns YES.
+ * Otherwise returns NO, and sets errPtr. If you don't care about the error, you can pass NULL for errPtr.
+**/
+- (BOOL)bindToAddress:(NSData *)localAddr error:(NSError **)errPtr;
+
+#pragma mark Connecting
+
+/**
+ * Connects the UDP socket to the given host and port.
+ * By design, UDP is a connectionless protocol, and connecting is not needed.
+ * 
+ * Choosing to connect to a specific host/port has the following effect:
+ * - You will only be able to send data to the connected host/port.
+ * - You will only be able to receive data from the connected host/port.
+ * - You will receive ICMP messages that come from the connected host/port, such as "connection refused".
+ * 
+ * The actual process of connecting a UDP socket does not result in any communication on the socket.
+ * It simply changes the internal state of the socket.
+ * 
+ * You cannot bind a socket after it has been connected.
+ * You can only connect a socket once.
+ * 
+ * The host may be a domain name (e.g. "deusty.com") or an IP address string (e.g. "192.168.0.2").
+ * 
+ * This method is asynchronous as it requires a DNS lookup to resolve the given host name.
+ * If an obvious error is detected, this method immediately returns NO and sets errPtr.
+ * If you don't care about the error, you can pass nil for errPtr.
+ * Otherwise, this method returns YES and begins the asynchronous connection process.
+ * The result of the asynchronous connection process will be reported via the delegate methods.
+ **/
+- (BOOL)connectToHost:(NSString *)host onPort:(uint16_t)port error:(NSError **)errPtr;
+
+/**
+ * Connects the UDP socket to the given address, specified as a sockaddr structure wrapped in a NSData object.
+ * 
+ * If you have an existing struct sockaddr you can convert it to a NSData object like so:
+ * struct sockaddr sa  -> NSData *dsa = [NSData dataWithBytes:&remoteAddr length:remoteAddr.sa_len];
+ * struct sockaddr *sa -> NSData *dsa = [NSData dataWithBytes:remoteAddr length:remoteAddr->sa_len];
+ * 
+ * By design, UDP is a connectionless protocol, and connecting is not needed.
+ * 
+ * Choosing to connect to a specific address has the following effect:
+ * - You will only be able to send data to the connected address.
+ * - You will only be able to receive data from the connected address.
+ * - You will receive ICMP messages that come from the connected address, such as "connection refused".
+ * 
+ * Connecting a UDP socket does not result in any communication on the socket.
+ * It simply changes the internal state of the socket.
+ * 
+ * You cannot bind a socket after its been connected.
+ * You can only connect a socket once.
+ * 
+ * On success, returns YES.
+ * Otherwise returns NO, and sets errPtr. If you don't care about the error, you can pass nil for errPtr.
+ * 
+ * Note: Unlike the connectToHost:onPort:error: method, this method does not require a DNS lookup.
+ * Thus when this method returns, the connection has either failed or fully completed.
+ * In other words, this method is synchronous, unlike the asynchronous connectToHost::: method.
+ * However, for compatibility and simplification of delegate code, if this method returns YES
+ * then the corresponding delegate method (udpSocket:didConnectToHost:port:) is still invoked.
+**/
+- (BOOL)connectToAddress:(NSData *)remoteAddr error:(NSError **)errPtr;
+
+#pragma mark Multicast
+
+/**
+ * Join multicast group.
+ * Group should be an IP address (eg @"225.228.0.1").
+ * 
+ * On success, returns YES.
+ * Otherwise returns NO, and sets errPtr. If you don't care about the error, you can pass nil for errPtr.
+**/
+- (BOOL)joinMulticastGroup:(NSString *)group error:(NSError **)errPtr;
+
+/**
+ * Join multicast group.
+ * Group should be an IP address (eg @"225.228.0.1").
+ * The interface may be a name (e.g. "en1" or "lo0") or the corresponding IP address (e.g. "192.168.4.35").
+ * 
+ * On success, returns YES.
+ * Otherwise returns NO, and sets errPtr. If you don't care about the error, you can pass nil for errPtr.
+**/
+- (BOOL)joinMulticastGroup:(NSString *)group onInterface:(nullable NSString *)interface error:(NSError **)errPtr;
+
+- (BOOL)leaveMulticastGroup:(NSString *)group error:(NSError **)errPtr;
+- (BOOL)leaveMulticastGroup:(NSString *)group onInterface:(nullable NSString *)interface error:(NSError **)errPtr;
+
+#pragma mark Reuse Port
+
+/**
+ * By default, only one socket can be bound to a given IP address + port at a time.
+ * To enable multiple processes to simultaneously bind to the same address+port, 
+ * you need to enable this functionality in the socket.  All processes that wish to
+ * use the address+port simultaneously must all enable reuse port on the socket
+ * bound to that port.
+ **/
+- (BOOL)enableReusePort:(BOOL)flag error:(NSError **)errPtr;
+
+#pragma mark Broadcast
+
+/**
+ * By default, the underlying socket in the OS will not allow you to send broadcast messages.
+ * In order to send broadcast messages, you need to enable this functionality in the socket.
+ * 
+ * A broadcast is a UDP message to addresses like "192.168.255.255" or "255.255.255.255" that is
+ * delivered to every host on the network.
+ * The reason this is generally disabled by default (by the OS) is to prevent
+ * accidental broadcast messages from flooding the network.
+**/
+- (BOOL)enableBroadcast:(BOOL)flag error:(NSError **)errPtr;
+
+#pragma mark Sending
+
+/**
+ * Asynchronously sends the given data, with the given timeout and tag.
+ * 
+ * This method may only be used with a connected socket.
+ * Recall that connecting is optional for a UDP socket.
+ * For connected sockets, data can only be sent to the connected address.
+ * For non-connected sockets, the remote destination is specified for each packet.
+ * For more information about optionally connecting udp sockets, see the documentation for the connect methods above.
+ * 
+ * @param data
+ *     The data to send.
+ *     If data is nil or zero-length, this method does nothing.
+ *     If passing NSMutableData, please read the thread-safety notice below.
+ * 
+ * @param timeout
+ *    The timeout for the send opeartion.
+ *    If the timeout value is negative, the send operation will not use a timeout.
+ * 
+ * @param tag
+ *    The tag is for your convenience.
+ *    It is not sent or received over the socket in any manner what-so-ever.
+ *    It is reported back as a parameter in the udpSocket:didSendDataWithTag:
+ *    or udpSocket:didNotSendDataWithTag:dueToError: methods.
+ *    You can use it as an array index, state id, type constant, etc.
+ * 
+ * 
+ * Thread-Safety Note:
+ * If the given data parameter is mutable (NSMutableData) then you MUST NOT alter the data while
+ * the socket is sending it. In other words, it's not safe to alter the data until after the delegate method
+ * udpSocket:didSendDataWithTag: or udpSocket:didNotSendDataWithTag:dueToError: is invoked signifying
+ * that this particular send operation has completed.
+ * This is due to the fact that GCDAsyncUdpSocket does NOT copy the data.
+ * It simply retains it for performance reasons.
+ * Often times, if NSMutableData is passed, it is because a request/response was built up in memory.
+ * Copying this data adds an unwanted/unneeded overhead.
+ * If you need to write data from an immutable buffer, and you need to alter the buffer before the socket
+ * completes sending the bytes (which is NOT immediately after this method returns, but rather at a later time
+ * when the delegate method notifies you), then you should first copy the bytes, and pass the copy to this method.
+**/
+- (void)sendData:(NSData *)data withTimeout:(NSTimeInterval)timeout tag:(long)tag;
+
+/**
+ * Asynchronously sends the given data, with the given timeout and tag, to the given host and port.
+ * 
+ * This method cannot be used with a connected socket.
+ * Recall that connecting is optional for a UDP socket.
+ * For connected sockets, data can only be sent to the connected address.
+ * For non-connected sockets, the remote destination is specified for each packet.
+ * For more information about optionally connecting udp sockets, see the documentation for the connect methods above.
+ * 
+ * @param data
+ *     The data to send.
+ *     If data is nil or zero-length, this method does nothing.
+ *     If passing NSMutableData, please read the thread-safety notice below.
+ * 
+ * @param host
+ *     The destination to send the udp packet to.
+ *     May be specified as a domain name (e.g. "deusty.com") or an IP address string (e.g. "192.168.0.2").
+ *     You may also use the convenience strings of "loopback" or "localhost".
+ * 
+ * @param port
+ *    The port of the host to send to.
+ * 
+ * @param timeout
+ *    The timeout for the send opeartion.
+ *    If the timeout value is negative, the send operation will not use a timeout.
+ * 
+ * @param tag
+ *    The tag is for your convenience.
+ *    It is not sent or received over the socket in any manner what-so-ever.
+ *    It is reported back as a parameter in the udpSocket:didSendDataWithTag:
+ *    or udpSocket:didNotSendDataWithTag:dueToError: methods.
+ *    You can use it as an array index, state id, type constant, etc.
+ * 
+ * 
+ * Thread-Safety Note:
+ * If the given data parameter is mutable (NSMutableData) then you MUST NOT alter the data while
+ * the socket is sending it. In other words, it's not safe to alter the data until after the delegate method
+ * udpSocket:didSendDataWithTag: or udpSocket:didNotSendDataWithTag:dueToError: is invoked signifying
+ * that this particular send operation has completed.
+ * This is due to the fact that GCDAsyncUdpSocket does NOT copy the data.
+ * It simply retains it for performance reasons.
+ * Often times, if NSMutableData is passed, it is because a request/response was built up in memory.
+ * Copying this data adds an unwanted/unneeded overhead.
+ * If you need to write data from an immutable buffer, and you need to alter the buffer before the socket
+ * completes sending the bytes (which is NOT immediately after this method returns, but rather at a later time
+ * when the delegate method notifies you), then you should first copy the bytes, and pass the copy to this method.
+**/
+- (void)sendData:(NSData *)data
+          toHost:(NSString *)host
+            port:(uint16_t)port
+     withTimeout:(NSTimeInterval)timeout
+             tag:(long)tag;
+
+/**
+ * Asynchronously sends the given data, with the given timeout and tag, to the given address.
+ * 
+ * This method cannot be used with a connected socket.
+ * Recall that connecting is optional for a UDP socket.
+ * For connected sockets, data can only be sent to the connected address.
+ * For non-connected sockets, the remote destination is specified for each packet.
+ * For more information about optionally connecting udp sockets, see the documentation for the connect methods above.
+ * 
+ * @param data
+ *     The data to send.
+ *     If data is nil or zero-length, this method does nothing.
+ *     If passing NSMutableData, please read the thread-safety notice below.
+ * 
+ * @param remoteAddr
+ *     The address to send the data to (specified as a sockaddr structure wrapped in a NSData object).
+ * 
+ * @param timeout
+ *    The timeout for the send opeartion.
+ *    If the timeout value is negative, the send operation will not use a timeout.
+ * 
+ * @param tag
+ *    The tag is for your convenience.
+ *    It is not sent or received over the socket in any manner what-so-ever.
+ *    It is reported back as a parameter in the udpSocket:didSendDataWithTag:
+ *    or udpSocket:didNotSendDataWithTag:dueToError: methods.
+ *    You can use it as an array index, state id, type constant, etc.
+ * 
+ * 
+ * Thread-Safety Note:
+ * If the given data parameter is mutable (NSMutableData) then you MUST NOT alter the data while
+ * the socket is sending it. In other words, it's not safe to alter the data until after the delegate method
+ * udpSocket:didSendDataWithTag: or udpSocket:didNotSendDataWithTag:dueToError: is invoked signifying
+ * that this particular send operation has completed.
+ * This is due to the fact that GCDAsyncUdpSocket does NOT copy the data.
+ * It simply retains it for performance reasons.
+ * Often times, if NSMutableData is passed, it is because a request/response was built up in memory.
+ * Copying this data adds an unwanted/unneeded overhead.
+ * If you need to write data from an immutable buffer, and you need to alter the buffer before the socket
+ * completes sending the bytes (which is NOT immediately after this method returns, but rather at a later time
+ * when the delegate method notifies you), then you should first copy the bytes, and pass the copy to this method.
+**/
+- (void)sendData:(NSData *)data toAddress:(NSData *)remoteAddr withTimeout:(NSTimeInterval)timeout tag:(long)tag;
+
+/**
+ * You may optionally set a send filter for the socket.
+ * A filter can provide several interesting possibilities:
+ * 
+ * 1. Optional caching of resolved addresses for domain names.
+ *    The cache could later be consulted, resulting in fewer system calls to getaddrinfo.
+ * 
+ * 2. Reusable modules of code for bandwidth monitoring.
+ * 
+ * 3. Sometimes traffic shapers are needed to simulate real world environments.
+ *    A filter allows you to write custom code to simulate such environments.
+ *    The ability to code this yourself is especially helpful when your simulated environment
+ *    is more complicated than simple traffic shaping (e.g. simulating a cone port restricted router),
+ *    or the system tools to handle this aren't available (e.g. on a mobile device).
+ * 
+ * For more information about GCDAsyncUdpSocketSendFilterBlock, see the documentation for its typedef.
+ * To remove a previously set filter, invoke this method and pass a nil filterBlock and NULL filterQueue.
+ * 
+ * Note: This method invokes setSendFilter:withQueue:isAsynchronous: (documented below),
+ *       passing YES for the isAsynchronous parameter.
+**/
+- (void)setSendFilter:(nullable GCDAsyncUdpSocketSendFilterBlock)filterBlock withQueue:(nullable dispatch_queue_t)filterQueue;
+
+/**
+ * The receive filter can be run via dispatch_async or dispatch_sync.
+ * Most typical situations call for asynchronous operation.
+ * 
+ * However, there are a few situations in which synchronous operation is preferred.
+ * Such is the case when the filter is extremely minimal and fast.
+ * This is because dispatch_sync is faster than dispatch_async.
+ * 
+ * If you choose synchronous operation, be aware of possible deadlock conditions.
+ * Since the socket queue is executing your block via dispatch_sync,
+ * then you cannot perform any tasks which may invoke dispatch_sync on the socket queue.
+ * For example, you can't query properties on the socket.
+**/
+- (void)setSendFilter:(nullable GCDAsyncUdpSocketSendFilterBlock)filterBlock
+            withQueue:(nullable dispatch_queue_t)filterQueue
+       isAsynchronous:(BOOL)isAsynchronous;
+
+#pragma mark Receiving
+
+/**
+ * There are two modes of operation for receiving packets: one-at-a-time & continuous.
+ * 
+ * In one-at-a-time mode, you call receiveOnce everytime your delegate is ready to process an incoming udp packet.
+ * Receiving packets one-at-a-time may be better suited for implementing certain state machine code,
+ * where your state machine may not always be ready to process incoming packets.
+ * 
+ * In continuous mode, the delegate is invoked immediately everytime incoming udp packets are received.
+ * Receiving packets continuously is better suited to real-time streaming applications.
+ * 
+ * You may switch back and forth between one-at-a-time mode and continuous mode.
+ * If the socket is currently in continuous mode, calling this method will switch it to one-at-a-time mode.
+ * 
+ * When a packet is received (and not filtered by the optional receive filter),
+ * the delegate method (udpSocket:didReceiveData:fromAddress:withFilterContext:) is invoked.
+ * 
+ * If the socket is able to begin receiving packets, this method returns YES.
+ * Otherwise it returns NO, and sets the errPtr with appropriate error information.
+ * 
+ * An example error:
+ * You created a udp socket to act as a server, and immediately called receive.
+ * You forgot to first bind the socket to a port number, and received a error with a message like:
+ * "Must bind socket before you can receive data."
+**/
+- (BOOL)receiveOnce:(NSError **)errPtr;
+
+/**
+ * There are two modes of operation for receiving packets: one-at-a-time & continuous.
+ * 
+ * In one-at-a-time mode, you call receiveOnce everytime your delegate is ready to process an incoming udp packet.
+ * Receiving packets one-at-a-time may be better suited for implementing certain state machine code,
+ * where your state machine may not always be ready to process incoming packets.
+ * 
+ * In continuous mode, the delegate is invoked immediately everytime incoming udp packets are received.
+ * Receiving packets continuously is better suited to real-time streaming applications.
+ * 
+ * You may switch back and forth between one-at-a-time mode and continuous mode.
+ * If the socket is currently in one-at-a-time mode, calling this method will switch it to continuous mode.
+ * 
+ * For every received packet (not filtered by the optional receive filter),
+ * the delegate method (udpSocket:didReceiveData:fromAddress:withFilterContext:) is invoked.
+ * 
+ * If the socket is able to begin receiving packets, this method returns YES.
+ * Otherwise it returns NO, and sets the errPtr with appropriate error information.
+ * 
+ * An example error:
+ * You created a udp socket to act as a server, and immediately called receive.
+ * You forgot to first bind the socket to a port number, and received a error with a message like:
+ * "Must bind socket before you can receive data."
+**/
+- (BOOL)beginReceiving:(NSError **)errPtr;
+
+/**
+ * If the socket is currently receiving (beginReceiving has been called), this method pauses the receiving.
+ * That is, it won't read any more packets from the underlying OS socket until beginReceiving is called again.
+ * 
+ * Important Note:
+ * GCDAsyncUdpSocket may be running in parallel with your code.
+ * That is, your delegate is likely running on a separate thread/dispatch_queue.
+ * When you invoke this method, GCDAsyncUdpSocket may have already dispatched delegate methods to be invoked.
+ * Thus, if those delegate methods have already been dispatch_async'd,
+ * your didReceive delegate method may still be invoked after this method has been called.
+ * You should be aware of this, and program defensively.
+**/
+- (void)pauseReceiving;
+
+/**
+ * You may optionally set a receive filter for the socket.
+ * This receive filter may be set to run in its own queue (independent of delegate queue).
+ * 
+ * A filter can provide several useful features.
+ * 
+ * 1. Many times udp packets need to be parsed.
+ *    Since the filter can run in its own independent queue, you can parallelize this parsing quite easily.
+ *    The end result is a parallel socket io, datagram parsing, and packet processing.
+ * 
+ * 2. Many times udp packets are discarded because they are duplicate/unneeded/unsolicited.
+ *    The filter can prevent such packets from arriving at the delegate.
+ *    And because the filter can run in its own independent queue, this doesn't slow down the delegate.
+ * 
+ *    - Since the udp protocol does not guarantee delivery, udp packets may be lost.
+ *      Many protocols built atop udp thus provide various resend/re-request algorithms.
+ *      This sometimes results in duplicate packets arriving.
+ *      A filter may allow you to architect the duplicate detection code to run in parallel to normal processing.
+ *    
+ *    - Since the udp socket may be connectionless, its possible for unsolicited packets to arrive.
+ *      Such packets need to be ignored.
+ * 
+ * 3. Sometimes traffic shapers are needed to simulate real world environments.
+ *    A filter allows you to write custom code to simulate such environments.
+ *    The ability to code this yourself is especially helpful when your simulated environment
+ *    is more complicated than simple traffic shaping (e.g. simulating a cone port restricted router),
+ *    or the system tools to handle this aren't available (e.g. on a mobile device).
+ * 
+ * Example:
+ * 
+ * GCDAsyncUdpSocketReceiveFilterBlock filter = ^BOOL (NSData *data, NSData *address, id *context) {
+ * 
+ *     MyProtocolMessage *msg = [MyProtocol parseMessage:data];
+ *     
+ *     *context = response;
+ *     return (response != nil);
+ * };
+ * [udpSocket setReceiveFilter:filter withQueue:myParsingQueue];
+ * 
+ * For more information about GCDAsyncUdpSocketReceiveFilterBlock, see the documentation for its typedef.
+ * To remove a previously set filter, invoke this method and pass a nil filterBlock and NULL filterQueue.
+ * 
+ * Note: This method invokes setReceiveFilter:withQueue:isAsynchronous: (documented below),
+ *       passing YES for the isAsynchronous parameter.
+**/
+- (void)setReceiveFilter:(nullable GCDAsyncUdpSocketReceiveFilterBlock)filterBlock withQueue:(nullable dispatch_queue_t)filterQueue;
+
+/**
+ * The receive filter can be run via dispatch_async or dispatch_sync.
+ * Most typical situations call for asynchronous operation.
+ * 
+ * However, there are a few situations in which synchronous operation is preferred.
+ * Such is the case when the filter is extremely minimal and fast.
+ * This is because dispatch_sync is faster than dispatch_async.
+ * 
+ * If you choose synchronous operation, be aware of possible deadlock conditions.
+ * Since the socket queue is executing your block via dispatch_sync,
+ * then you cannot perform any tasks which may invoke dispatch_sync on the socket queue.
+ * For example, you can't query properties on the socket.
+**/
+- (void)setReceiveFilter:(nullable GCDAsyncUdpSocketReceiveFilterBlock)filterBlock
+               withQueue:(nullable dispatch_queue_t)filterQueue
+          isAsynchronous:(BOOL)isAsynchronous;
+
+#pragma mark Closing
+
+/**
+ * Immediately closes the underlying socket.
+ * Any pending send operations are discarded.
+ * 
+ * The GCDAsyncUdpSocket instance may optionally be used again.
+ *   (it will setup/configure/use another unnderlying BSD socket).
+**/
+- (void)close;
+
+/**
+ * Closes the underlying socket after all pending send operations have been sent.
+ * 
+ * The GCDAsyncUdpSocket instance may optionally be used again.
+ *   (it will setup/configure/use another unnderlying BSD socket).
+**/
+- (void)closeAfterSending;
+
+#pragma mark Advanced
+/**
+ * GCDAsyncSocket maintains thread safety by using an internal serial dispatch_queue.
+ * In most cases, the instance creates this queue itself.
+ * However, to allow for maximum flexibility, the internal queue may be passed in the init method.
+ * This allows for some advanced options such as controlling socket priority via target queues.
+ * However, when one begins to use target queues like this, they open the door to some specific deadlock issues.
+ *
+ * For example, imagine there are 2 queues:
+ * dispatch_queue_t socketQueue;
+ * dispatch_queue_t socketTargetQueue;
+ *
+ * If you do this (pseudo-code):
+ * socketQueue.targetQueue = socketTargetQueue;
+ *
+ * Then all socketQueue operations will actually get run on the given socketTargetQueue.
+ * This is fine and works great in most situations.
+ * But if you run code directly from within the socketTargetQueue that accesses the socket,
+ * you could potentially get deadlock. Imagine the following code:
+ *
+ * - (BOOL)socketHasSomething
+ * {
+ *     __block BOOL result = NO;
+ *     dispatch_block_t block = ^{
+ *         result = [self someInternalMethodToBeRunOnlyOnSocketQueue];
+ *     }
+ *     if (is_executing_on_queue(socketQueue))
+ *         block();
+ *     else
+ *         dispatch_sync(socketQueue, block);
+ *
+ *     return result;
+ * }
+ *
+ * What happens if you call this method from the socketTargetQueue? The result is deadlock.
+ * This is because the GCD API offers no mechanism to discover a queue's targetQueue.
+ * Thus we have no idea if our socketQueue is configured with a targetQueue.
+ * If we had this information, we could easily avoid deadlock.
+ * But, since these API's are missing or unfeasible, you'll have to explicitly set it.
+ *
+ * IF you pass a socketQueue via the init method,
+ * AND you've configured the passed socketQueue with a targetQueue,
+ * THEN you should pass the end queue in the target hierarchy.
+ *
+ * For example, consider the following queue hierarchy:
+ * socketQueue -> ipQueue -> moduleQueue
+ *
+ * This example demonstrates priority shaping within some server.
+ * All incoming client connections from the same IP address are executed on the same target queue.
+ * And all connections for a particular module are executed on the same target queue.
+ * Thus, the priority of all networking for the entire module can be changed on the fly.
+ * Additionally, networking traffic from a single IP cannot monopolize the module.
+ *
+ * Here's how you would accomplish something like that:
+ * - (dispatch_queue_t)newSocketQueueForConnectionFromAddress:(NSData *)address onSocket:(GCDAsyncSocket *)sock
+ * {
+ *     dispatch_queue_t socketQueue = dispatch_queue_create("", NULL);
+ *     dispatch_queue_t ipQueue = [self ipQueueForAddress:address];
+ *
+ *     dispatch_set_target_queue(socketQueue, ipQueue);
+ *     dispatch_set_target_queue(iqQueue, moduleQueue);
+ *
+ *     return socketQueue;
+ * }
+ * - (void)socket:(GCDAsyncSocket *)sock didAcceptNewSocket:(GCDAsyncSocket *)newSocket
+ * {
+ *     [clientConnections addObject:newSocket];
+ *     [newSocket markSocketQueueTargetQueue:moduleQueue];
+ * }
+ *
+ * Note: This workaround is ONLY needed if you intend to execute code directly on the ipQueue or moduleQueue.
+ * This is often NOT the case, as such queues are used solely for execution shaping.
+ **/
+- (void)markSocketQueueTargetQueue:(dispatch_queue_t)socketQueuesPreConfiguredTargetQueue;
+- (void)unmarkSocketQueueTargetQueue:(dispatch_queue_t)socketQueuesPreviouslyConfiguredTargetQueue;
+
+/**
+ * It's not thread-safe to access certain variables from outside the socket's internal queue.
+ * 
+ * For example, the socket file descriptor.
+ * File descriptors are simply integers which reference an index in the per-process file table.
+ * However, when one requests a new file descriptor (by opening a file or socket),
+ * the file descriptor returned is guaranteed to be the lowest numbered unused descriptor.
+ * So if we're not careful, the following could be possible:
+ * 
+ * - Thread A invokes a method which returns the socket's file descriptor.
+ * - The socket is closed via the socket's internal queue on thread B.
+ * - Thread C opens a file, and subsequently receives the file descriptor that was previously the socket's FD.
+ * - Thread A is now accessing/altering the file instead of the socket.
+ * 
+ * In addition to this, other variables are not actually objects,
+ * and thus cannot be retained/released or even autoreleased.
+ * An example is the sslContext, of type SSLContextRef, which is actually a malloc'd struct.
+ * 
+ * Although there are internal variables that make it difficult to maintain thread-safety,
+ * it is important to provide access to these variables
+ * to ensure this class can be used in a wide array of environments.
+ * This method helps to accomplish this by invoking the current block on the socket's internal queue.
+ * The methods below can be invoked from within the block to access
+ * those generally thread-unsafe internal variables in a thread-safe manner.
+ * The given block will be invoked synchronously on the socket's internal queue.
+ * 
+ * If you save references to any protected variables and use them outside the block, you do so at your own peril.
+**/
+- (void)performBlock:(dispatch_block_t)block;
+
+/**
+ * These methods are only available from within the context of a performBlock: invocation.
+ * See the documentation for the performBlock: method above.
+ * 
+ * Provides access to the socket's file descriptor(s).
+ * If the socket isn't connected, or explicity bound to a particular interface,
+ * it might actually have multiple internal socket file descriptors - one for IPv4 and one for IPv6.
+**/
+- (int)socketFD;
+- (int)socket4FD;
+- (int)socket6FD;
+
+#if TARGET_OS_IPHONE
+
+/**
+ * These methods are only available from within the context of a performBlock: invocation.
+ * See the documentation for the performBlock: method above.
+ * 
+ * Returns (creating if necessary) a CFReadStream/CFWriteStream for the internal socket.
+ * 
+ * Generally GCDAsyncUdpSocket doesn't use CFStream. (It uses the faster GCD API's.)
+ * However, if you need one for any reason,
+ * these methods are a convenient way to get access to a safe instance of one.
+**/
+- (nullable CFReadStreamRef)readStream;
+- (nullable CFWriteStreamRef)writeStream;
+
+/**
+ * This method is only available from within the context of a performBlock: invocation.
+ * See the documentation for the performBlock: method above.
+ * 
+ * Configures the socket to allow it to operate when the iOS application has been backgrounded.
+ * In other words, this method creates a read & write stream, and invokes:
+ * 
+ * CFReadStreamSetProperty(readStream, kCFStreamNetworkServiceType, kCFStreamNetworkServiceTypeVoIP);
+ * CFWriteStreamSetProperty(writeStream, kCFStreamNetworkServiceType, kCFStreamNetworkServiceTypeVoIP);
+ * 
+ * Returns YES if successful, NO otherwise.
+ * 
+ * Example usage:
+ * 
+ * [asyncUdpSocket performBlock:^{
+ *     [asyncUdpSocket enableBackgroundingOnSocket];
+ * }];
+ * 
+ * 
+ * NOTE : Apple doesn't currently support backgrounding UDP sockets. (Only TCP for now).
+**/
+//- (BOOL)enableBackgroundingOnSockets;
+
+#endif
+
+#pragma mark Utilities
+
+/**
+ * Extracting host/port/family information from raw address data.
+**/
+
++ (nullable NSString *)hostFromAddress:(NSData *)address;
++ (uint16_t)portFromAddress:(NSData *)address;
++ (int)familyFromAddress:(NSData *)address;
+
++ (BOOL)isIPv4Address:(NSData *)address;
++ (BOOL)isIPv6Address:(NSData *)address;
+
++ (BOOL)getHost:(NSString * __nullable * __nullable)hostPtr port:(uint16_t * __nullable)portPtr fromAddress:(NSData *)address;
++ (BOOL)getHost:(NSString * __nullable * __nullable)hostPtr port:(uint16_t * __nullable)portPtr family:(int * __nullable)afPtr fromAddress:(NSData *)address;
+
+@end
+
+NS_ASSUME_NONNULL_END
diff --git a/Pods/CocoaAsyncSocket/Source/GCD/GCDAsyncUdpSocket.m b/Pods/CocoaAsyncSocket/Source/GCD/GCDAsyncUdpSocket.m
new file mode 100755
index 0000000..6fce269
--- /dev/null
+++ b/Pods/CocoaAsyncSocket/Source/GCD/GCDAsyncUdpSocket.m
@@ -0,0 +1,5508 @@
+//  
+//  GCDAsyncUdpSocket
+//  
+//  This class is in the public domain.
+//  Originally created by Robbie Hanson of Deusty LLC.
+//  Updated and maintained by Deusty LLC and the Apple development community.
+//  
+//  https://github.com/robbiehanson/CocoaAsyncSocket
+//
+
+#import "GCDAsyncUdpSocket.h"
+
+#if ! __has_feature(objc_arc)
+#warning This file must be compiled with ARC. Use -fobjc-arc flag (or convert project to ARC).
+// For more information see: https://github.com/robbiehanson/CocoaAsyncSocket/wiki/ARC
+#endif
+
+#if TARGET_OS_IPHONE
+  #import <CFNetwork/CFNetwork.h>
+  #import <UIKit/UIKit.h>
+#endif
+
+#import <arpa/inet.h>
+#import <fcntl.h>
+#import <ifaddrs.h>
+#import <netdb.h>
+#import <net/if.h>
+#import <sys/socket.h>
+#import <sys/types.h>
+
+
+#if 0
+
+// Logging Enabled - See log level below
+
+// Logging uses the CocoaLumberjack framework (which is also GCD based).
+// http://code.google.com/p/cocoalumberjack/
+// 
+// It allows us to do a lot of logging without significantly slowing down the code.
+#import "DDLog.h"
+
+#define LogAsync   NO
+#define LogContext 65535
+
+#define LogObjc(flg, frmt, ...) LOG_OBJC_MAYBE(LogAsync, logLevel, flg, LogContext, frmt, ##__VA_ARGS__)
+#define LogC(flg, frmt, ...)    LOG_C_MAYBE(LogAsync, logLevel, flg, LogContext, frmt, ##__VA_ARGS__)
+
+#define LogError(frmt, ...)     LogObjc(LOG_FLAG_ERROR,   (@"%@: " frmt), THIS_FILE, ##__VA_ARGS__)
+#define LogWarn(frmt, ...)      LogObjc(LOG_FLAG_WARN,    (@"%@: " frmt), THIS_FILE, ##__VA_ARGS__)
+#define LogInfo(frmt, ...)      LogObjc(LOG_FLAG_INFO,    (@"%@: " frmt), THIS_FILE, ##__VA_ARGS__)
+#define LogVerbose(frmt, ...)   LogObjc(LOG_FLAG_VERBOSE, (@"%@: " frmt), THIS_FILE, ##__VA_ARGS__)
+
+#define LogCError(frmt, ...)    LogC(LOG_FLAG_ERROR,   (@"%@: " frmt), THIS_FILE, ##__VA_ARGS__)
+#define LogCWarn(frmt, ...)     LogC(LOG_FLAG_WARN,    (@"%@: " frmt), THIS_FILE, ##__VA_ARGS__)
+#define LogCInfo(frmt, ...)     LogC(LOG_FLAG_INFO,    (@"%@: " frmt), THIS_FILE, ##__VA_ARGS__)
+#define LogCVerbose(frmt, ...)  LogC(LOG_FLAG_VERBOSE, (@"%@: " frmt), THIS_FILE, ##__VA_ARGS__)
+
+#define LogTrace()              LogObjc(LOG_FLAG_VERBOSE, @"%@: %@", THIS_FILE, THIS_METHOD)
+#define LogCTrace()             LogC(LOG_FLAG_VERBOSE, @"%@: %s", THIS_FILE, __FUNCTION__)
+
+// Log levels : off, error, warn, info, verbose
+static const int logLevel = LOG_LEVEL_VERBOSE;
+
+#else
+
+// Logging Disabled
+
+#define LogError(frmt, ...)     {}
+#define LogWarn(frmt, ...)      {}
+#define LogInfo(frmt, ...)      {}
+#define LogVerbose(frmt, ...)   {}
+
+#define LogCError(frmt, ...)    {}
+#define LogCWarn(frmt, ...)     {}
+#define LogCInfo(frmt, ...)     {}
+#define LogCVerbose(frmt, ...)  {}
+
+#define LogTrace()              {}
+#define LogCTrace(frmt, ...)    {}
+
+#endif
+
+/**
+ * Seeing a return statements within an inner block
+ * can sometimes be mistaken for a return point of the enclosing method.
+ * This makes inline blocks a bit easier to read.
+**/
+#define return_from_block  return
+
+/**
+ * A socket file descriptor is really just an integer.
+ * It represents the index of the socket within the kernel.
+ * This makes invalid file descriptor comparisons easier to read.
+**/
+#define SOCKET_NULL -1
+
+/**
+ * Just to type less code.
+**/
+#define AutoreleasedBlock(block) ^{ @autoreleasepool { block(); }} 
+
+
+@class GCDAsyncUdpSendPacket;
+
+NSString *const GCDAsyncUdpSocketException = @"GCDAsyncUdpSocketException";
+NSString *const GCDAsyncUdpSocketErrorDomain = @"GCDAsyncUdpSocketErrorDomain";
+
+NSString *const GCDAsyncUdpSocketQueueName = @"GCDAsyncUdpSocket";
+NSString *const GCDAsyncUdpSocketThreadName = @"GCDAsyncUdpSocket-CFStream";
+
+enum GCDAsyncUdpSocketFlags
+{
+	kDidCreateSockets        = 1 <<  0,  // If set, the sockets have been created.
+	kDidBind                 = 1 <<  1,  // If set, bind has been called.
+	kConnecting              = 1 <<  2,  // If set, a connection attempt is in progress.
+	kDidConnect              = 1 <<  3,  // If set, socket is connected.
+	kReceiveOnce             = 1 <<  4,  // If set, one-at-a-time receive is enabled
+	kReceiveContinuous       = 1 <<  5,  // If set, continuous receive is enabled
+	kIPv4Deactivated         = 1 <<  6,  // If set, socket4 was closed due to bind or connect on IPv6.
+	kIPv6Deactivated         = 1 <<  7,  // If set, socket6 was closed due to bind or connect on IPv4.
+	kSend4SourceSuspended    = 1 <<  8,  // If set, send4Source is suspended.
+	kSend6SourceSuspended    = 1 <<  9,  // If set, send6Source is suspended.
+	kReceive4SourceSuspended = 1 << 10,  // If set, receive4Source is suspended.
+	kReceive6SourceSuspended = 1 << 11,  // If set, receive6Source is suspended.
+	kSock4CanAcceptBytes     = 1 << 12,  // If set, we know socket4 can accept bytes. If unset, it's unknown.
+	kSock6CanAcceptBytes     = 1 << 13,  // If set, we know socket6 can accept bytes. If unset, it's unknown.
+	kForbidSendReceive       = 1 << 14,  // If set, no new send or receive operations are allowed to be queued.
+	kCloseAfterSends         = 1 << 15,  // If set, close as soon as no more sends are queued.
+	kFlipFlop                = 1 << 16,  // Used to alternate between IPv4 and IPv6 sockets.
+#if TARGET_OS_IPHONE
+	kAddedStreamListener     = 1 << 17,  // If set, CFStreams have been added to listener thread
+#endif
+};
+
+enum GCDAsyncUdpSocketConfig
+{
+	kIPv4Disabled  = 1 << 0,  // If set, IPv4 is disabled
+	kIPv6Disabled  = 1 << 1,  // If set, IPv6 is disabled
+	kPreferIPv4    = 1 << 2,  // If set, IPv4 is preferred over IPv6
+	kPreferIPv6    = 1 << 3,  // If set, IPv6 is preferred over IPv4
+};
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+#pragma mark -
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+@interface GCDAsyncUdpSocket ()
+{
+#if __has_feature(objc_arc_weak)
+	__weak id delegate;
+#else
+	__unsafe_unretained id delegate;
+#endif
+	dispatch_queue_t delegateQueue;
+	
+	GCDAsyncUdpSocketReceiveFilterBlock receiveFilterBlock;
+	dispatch_queue_t receiveFilterQueue;
+	BOOL receiveFilterAsync;
+	
+	GCDAsyncUdpSocketSendFilterBlock sendFilterBlock;
+	dispatch_queue_t sendFilterQueue;
+	BOOL sendFilterAsync;
+	
+	uint32_t flags;
+	uint16_t config;
+	
+	uint16_t max4ReceiveSize;
+	uint32_t max6ReceiveSize;
+    
+    uint16_t maxSendSize;
+	
+	int socket4FD;
+	int socket6FD;
+	
+	dispatch_queue_t socketQueue;
+	
+	dispatch_source_t send4Source;
+	dispatch_source_t send6Source;
+	dispatch_source_t receive4Source;
+	dispatch_source_t receive6Source;
+	dispatch_source_t sendTimer;
+	
+	GCDAsyncUdpSendPacket *currentSend;
+	NSMutableArray *sendQueue;
+	
+	unsigned long socket4FDBytesAvailable;
+	unsigned long socket6FDBytesAvailable;
+	
+	uint32_t pendingFilterOperations;
+	
+	NSData   *cachedLocalAddress4;
+	NSString *cachedLocalHost4;
+	uint16_t  cachedLocalPort4;
+	
+	NSData   *cachedLocalAddress6;
+	NSString *cachedLocalHost6;
+	uint16_t  cachedLocalPort6;
+	
+	NSData   *cachedConnectedAddress;
+	NSString *cachedConnectedHost;
+	uint16_t  cachedConnectedPort;
+	int       cachedConnectedFamily;
+
+	void *IsOnSocketQueueOrTargetQueueKey;    
+	
+#if TARGET_OS_IPHONE
+	CFStreamClientContext streamContext;
+	CFReadStreamRef readStream4;
+	CFReadStreamRef readStream6;
+	CFWriteStreamRef writeStream4;
+	CFWriteStreamRef writeStream6;
+#endif
+	
+	id userData;
+}
+
+- (void)resumeSend4Source;
+- (void)resumeSend6Source;
+- (void)resumeReceive4Source;
+- (void)resumeReceive6Source;
+- (void)closeSockets;
+
+- (void)maybeConnect;
+- (BOOL)connectWithAddress4:(NSData *)address4 error:(NSError **)errPtr;
+- (BOOL)connectWithAddress6:(NSData *)address6 error:(NSError **)errPtr;
+
+- (void)maybeDequeueSend;
+- (void)doPreSend;
+- (void)doSend;
+- (void)endCurrentSend;
+- (void)setupSendTimerWithTimeout:(NSTimeInterval)timeout;
+
+- (void)doReceive;
+- (void)doReceiveEOF;
+
+- (void)closeWithError:(NSError *)error;
+
+- (BOOL)performMulticastRequest:(int)requestType forGroup:(NSString *)group onInterface:(NSString *)interface error:(NSError **)errPtr;
+
+#if TARGET_OS_IPHONE
+- (BOOL)createReadAndWriteStreams:(NSError **)errPtr;
+- (BOOL)registerForStreamCallbacks:(NSError **)errPtr;
+- (BOOL)addStreamsToRunLoop:(NSError **)errPtr;
+- (BOOL)openStreams:(NSError **)errPtr;
+- (void)removeStreamsFromRunLoop;
+- (void)closeReadAndWriteStreams;
+#endif
+
++ (NSString *)hostFromSockaddr4:(const struct sockaddr_in *)pSockaddr4;
++ (NSString *)hostFromSockaddr6:(const struct sockaddr_in6 *)pSockaddr6;
++ (uint16_t)portFromSockaddr4:(const struct sockaddr_in *)pSockaddr4;
++ (uint16_t)portFromSockaddr6:(const struct sockaddr_in6 *)pSockaddr6;
+
+#if TARGET_OS_IPHONE
+// Forward declaration
++ (void)listenerThread;
+#endif
+
+@end
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+#pragma mark -
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+/**
+ * The GCDAsyncUdpSendPacket encompasses the instructions for a single send/write.
+**/
+@interface GCDAsyncUdpSendPacket : NSObject {
+@public
+	NSData *buffer;
+	NSTimeInterval timeout;
+	long tag;
+	
+	BOOL resolveInProgress;
+	BOOL filterInProgress;
+	
+	NSArray *resolvedAddresses;
+	NSError *resolveError;
+	
+	NSData *address;
+	int addressFamily;
+}
+
+- (id)initWithData:(NSData *)d timeout:(NSTimeInterval)t tag:(long)i;
+
+@end
+
+@implementation GCDAsyncUdpSendPacket
+
+- (id)initWithData:(NSData *)d timeout:(NSTimeInterval)t tag:(long)i
+{
+	if ((self = [super init]))
+	{
+		buffer = d;
+		timeout = t;
+		tag = i;
+		
+		resolveInProgress = NO;
+	}
+	return self;
+}
+
+
+@end
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+#pragma mark -
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+@interface GCDAsyncUdpSpecialPacket : NSObject {
+@public
+//	uint8_t type;
+	
+	BOOL resolveInProgress;
+	
+	NSArray *addresses;
+	NSError *error;
+}
+
+- (id)init;
+
+@end
+
+@implementation GCDAsyncUdpSpecialPacket
+
+- (id)init
+{
+	self = [super init];
+	return self;
+}
+
+
+@end
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+#pragma mark -
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+@implementation GCDAsyncUdpSocket
+
+- (id)init
+{
+	LogTrace();
+	
+	return [self initWithDelegate:nil delegateQueue:NULL socketQueue:NULL];
+}
+
+- (id)initWithSocketQueue:(dispatch_queue_t)sq
+{
+	LogTrace();
+	
+	return [self initWithDelegate:nil delegateQueue:NULL socketQueue:sq];
+}
+
+- (id)initWithDelegate:(id <GCDAsyncUdpSocketDelegate>)aDelegate delegateQueue:(dispatch_queue_t)dq
+{
+	LogTrace();
+	
+	return [self initWithDelegate:aDelegate delegateQueue:dq socketQueue:NULL];
+}
+
+- (id)initWithDelegate:(id <GCDAsyncUdpSocketDelegate>)aDelegate delegateQueue:(dispatch_queue_t)dq socketQueue:(dispatch_queue_t)sq
+{
+	LogTrace();
+	
+	if ((self = [super init]))
+	{
+		delegate = aDelegate;
+		
+		if (dq)
+		{
+			delegateQueue = dq;
+			#if !OS_OBJECT_USE_OBJC
+			dispatch_retain(delegateQueue);
+			#endif
+		}
+		
+		max4ReceiveSize = 65535;
+		max6ReceiveSize = 65535;
+		
+        maxSendSize = 65535;
+        
+		socket4FD = SOCKET_NULL;
+		socket6FD = SOCKET_NULL;
+		
+		if (sq)
+		{
+			NSAssert(sq != dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_LOW, 0),
+			         @"The given socketQueue parameter must not be a concurrent queue.");
+			NSAssert(sq != dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0),
+			         @"The given socketQueue parameter must not be a concurrent queue.");
+			NSAssert(sq != dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0),
+			         @"The given socketQueue parameter must not be a concurrent queue.");
+			
+			socketQueue = sq;
+			#if !OS_OBJECT_USE_OBJC
+			dispatch_retain(socketQueue);
+			#endif
+		}
+		else
+		{
+			socketQueue = dispatch_queue_create([GCDAsyncUdpSocketQueueName UTF8String], NULL);
+		}
+
+		// The dispatch_queue_set_specific() and dispatch_get_specific() functions take a "void *key" parameter.
+		// From the documentation:
+		//
+		// > Keys are only compared as pointers and are never dereferenced.
+		// > Thus, you can use a pointer to a static variable for a specific subsystem or
+		// > any other value that allows you to identify the value uniquely.
+		//
+		// We're just going to use the memory address of an ivar.
+		// Specifically an ivar that is explicitly named for our purpose to make the code more readable.
+		//
+		// However, it feels tedious (and less readable) to include the "&" all the time:
+		// dispatch_get_specific(&IsOnSocketQueueOrTargetQueueKey)
+		//
+		// So we're going to make it so it doesn't matter if we use the '&' or not,
+		// by assigning the value of the ivar to the address of the ivar.
+		// Thus: IsOnSocketQueueOrTargetQueueKey == &IsOnSocketQueueOrTargetQueueKey;
+
+		IsOnSocketQueueOrTargetQueueKey = &IsOnSocketQueueOrTargetQueueKey;
+
+		void *nonNullUnusedPointer = (__bridge void *)self;
+		dispatch_queue_set_specific(socketQueue, IsOnSocketQueueOrTargetQueueKey, nonNullUnusedPointer, NULL);
+		
+		currentSend = nil;
+		sendQueue = [[NSMutableArray alloc] initWithCapacity:5];
+		
+		#if TARGET_OS_IPHONE
+		[[NSNotificationCenter defaultCenter] addObserver:self
+		                                         selector:@selector(applicationWillEnterForeground:)
+		                                             name:UIApplicationWillEnterForegroundNotification
+		                                           object:nil];
+		#endif
+	}
+	return self;
+}
+
+- (void)dealloc
+{
+	LogInfo(@"%@ - %@ (start)", THIS_METHOD, self);
+	
+#if TARGET_OS_IPHONE
+	[[NSNotificationCenter defaultCenter] removeObserver:self];
+#endif
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+	{
+		[self closeWithError:nil];
+	}
+	else
+	{
+		dispatch_sync(socketQueue, ^{
+			[self closeWithError:nil];
+		});
+	}
+	
+	delegate = nil;
+	#if !OS_OBJECT_USE_OBJC
+	if (delegateQueue) dispatch_release(delegateQueue);
+	#endif
+	delegateQueue = NULL;
+	
+	#if !OS_OBJECT_USE_OBJC
+	if (socketQueue) dispatch_release(socketQueue);
+	#endif
+	socketQueue = NULL;
+	
+	LogInfo(@"%@ - %@ (finish)", THIS_METHOD, self);
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+#pragma mark Configuration
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+- (id)delegate
+{
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+	{
+		return delegate;
+	}
+	else
+	{
+		__block id result = nil;
+		
+		dispatch_sync(socketQueue, ^{
+            result = self->delegate;
+		});
+		
+		return result;
+	}
+}
+
+- (void)setDelegate:(id <GCDAsyncUdpSocketDelegate>)newDelegate synchronously:(BOOL)synchronously
+{
+	dispatch_block_t block = ^{
+        self->delegate = newDelegate;
+	};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey)) {
+		block();
+	}
+	else {
+		if (synchronously)
+			dispatch_sync(socketQueue, block);
+		else
+			dispatch_async(socketQueue, block);
+	}
+}
+
+- (void)setDelegate:(id <GCDAsyncUdpSocketDelegate>)newDelegate
+{
+	[self setDelegate:newDelegate synchronously:NO];
+}
+
+- (void)synchronouslySetDelegate:(id <GCDAsyncUdpSocketDelegate>)newDelegate
+{
+	[self setDelegate:newDelegate synchronously:YES];
+}
+
+- (dispatch_queue_t)delegateQueue
+{
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+	{
+		return delegateQueue;
+	}
+	else
+	{
+		__block dispatch_queue_t result = NULL;
+		
+		dispatch_sync(socketQueue, ^{
+            result = self->delegateQueue;
+		});
+		
+		return result;
+	}
+}
+
+- (void)setDelegateQueue:(dispatch_queue_t)newDelegateQueue synchronously:(BOOL)synchronously
+{
+	dispatch_block_t block = ^{
+		
+		#if !OS_OBJECT_USE_OBJC
+        if (self->delegateQueue) dispatch_release(self->delegateQueue);
+		if (newDelegateQueue) dispatch_retain(newDelegateQueue);
+		#endif
+		
+        self->delegateQueue = newDelegateQueue;
+	};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey)) {
+		block();
+	}
+	else {
+		if (synchronously)
+			dispatch_sync(socketQueue, block);
+		else
+			dispatch_async(socketQueue, block);
+	}
+}
+
+- (void)setDelegateQueue:(dispatch_queue_t)newDelegateQueue
+{
+	[self setDelegateQueue:newDelegateQueue synchronously:NO];
+}
+
+- (void)synchronouslySetDelegateQueue:(dispatch_queue_t)newDelegateQueue
+{
+	[self setDelegateQueue:newDelegateQueue synchronously:YES];
+}
+
+- (void)getDelegate:(id <GCDAsyncUdpSocketDelegate> *)delegatePtr delegateQueue:(dispatch_queue_t *)delegateQueuePtr
+{
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+	{
+		if (delegatePtr) *delegatePtr = delegate;
+		if (delegateQueuePtr) *delegateQueuePtr = delegateQueue;
+	}
+	else
+	{
+		__block id dPtr = NULL;
+		__block dispatch_queue_t dqPtr = NULL;
+		
+		dispatch_sync(socketQueue, ^{
+            dPtr = self->delegate;
+            dqPtr = self->delegateQueue;
+		});
+		
+		if (delegatePtr) *delegatePtr = dPtr;
+		if (delegateQueuePtr) *delegateQueuePtr = dqPtr;
+	}
+}
+
+- (void)setDelegate:(id <GCDAsyncUdpSocketDelegate>)newDelegate delegateQueue:(dispatch_queue_t)newDelegateQueue synchronously:(BOOL)synchronously
+{
+	dispatch_block_t block = ^{
+		
+        self->delegate = newDelegate;
+		
+		#if !OS_OBJECT_USE_OBJC
+        if (self->delegateQueue) dispatch_release(self->delegateQueue);
+		if (newDelegateQueue) dispatch_retain(newDelegateQueue);
+		#endif
+		
+        self->delegateQueue = newDelegateQueue;
+	};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey)) {
+		block();
+	}
+	else {
+		if (synchronously)
+			dispatch_sync(socketQueue, block);
+		else
+			dispatch_async(socketQueue, block);
+	}
+}
+
+- (void)setDelegate:(id <GCDAsyncUdpSocketDelegate>)newDelegate delegateQueue:(dispatch_queue_t)newDelegateQueue
+{
+	[self setDelegate:newDelegate delegateQueue:newDelegateQueue synchronously:NO];
+}
+
+- (void)synchronouslySetDelegate:(id <GCDAsyncUdpSocketDelegate>)newDelegate delegateQueue:(dispatch_queue_t)newDelegateQueue
+{
+	[self setDelegate:newDelegate delegateQueue:newDelegateQueue synchronously:YES];
+}
+
+- (BOOL)isIPv4Enabled
+{
+	// Note: YES means kIPv4Disabled is OFF
+	
+	__block BOOL result = NO;
+	
+	dispatch_block_t block = ^{
+		
+        result = ((self->config & kIPv4Disabled) == 0);
+	};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_sync(socketQueue, block);
+	
+	return result;
+}
+
+- (void)setIPv4Enabled:(BOOL)flag
+{
+	// Note: YES means kIPv4Disabled is OFF
+	
+	dispatch_block_t block = ^{
+		
+		LogVerbose(@"%@ %@", THIS_METHOD, (flag ? @"YES" : @"NO"));
+		
+		if (flag)
+            self->config &= ~kIPv4Disabled;
+		else
+            self->config |= kIPv4Disabled;
+	};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_async(socketQueue, block);
+}
+
+- (BOOL)isIPv6Enabled
+{
+	// Note: YES means kIPv6Disabled is OFF
+	
+	__block BOOL result = NO;
+	
+	dispatch_block_t block = ^{
+		
+        result = ((self->config & kIPv6Disabled) == 0);
+	};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_sync(socketQueue, block);
+	
+	return result;
+}
+
+- (void)setIPv6Enabled:(BOOL)flag
+{
+	// Note: YES means kIPv6Disabled is OFF
+	
+	dispatch_block_t block = ^{
+		
+		LogVerbose(@"%@ %@", THIS_METHOD, (flag ? @"YES" : @"NO"));
+		
+		if (flag)
+            self->config &= ~kIPv6Disabled;
+		else
+            self->config |= kIPv6Disabled;
+	};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_async(socketQueue, block);
+}
+
+- (BOOL)isIPv4Preferred
+{
+	__block BOOL result = NO;
+	
+	dispatch_block_t block = ^{
+        result = (self->config & kPreferIPv4) ? YES : NO;
+	};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_sync(socketQueue, block);
+	
+	return result;
+}
+
+- (BOOL)isIPv6Preferred
+{
+	__block BOOL result = NO;
+	
+	dispatch_block_t block = ^{
+        result = (self->config & kPreferIPv6) ? YES : NO;
+	};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_sync(socketQueue, block);
+	
+	return result;
+}
+
+- (BOOL)isIPVersionNeutral
+{
+	__block BOOL result = NO;
+	
+	dispatch_block_t block = ^{
+        result = (self->config & (kPreferIPv4 | kPreferIPv6)) == 0;
+	};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_sync(socketQueue, block);
+	
+	return result;
+}
+
+- (void)setPreferIPv4
+{
+	dispatch_block_t block = ^{
+		
+		LogTrace();
+		
+        self->config |=  kPreferIPv4;
+        self->config &= ~kPreferIPv6;
+		
+	};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_async(socketQueue, block);
+}
+
+- (void)setPreferIPv6
+{
+	dispatch_block_t block = ^{
+		
+		LogTrace();
+		
+        self->config &= ~kPreferIPv4;
+        self->config |=  kPreferIPv6;
+		
+	};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_async(socketQueue, block);
+}
+
+- (void)setIPVersionNeutral
+{
+	dispatch_block_t block = ^{
+		
+		LogTrace();
+		
+        self->config &= ~kPreferIPv4;
+        self->config &= ~kPreferIPv6;
+		
+	};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_async(socketQueue, block);
+}
+
+- (uint16_t)maxReceiveIPv4BufferSize
+{
+	__block uint16_t result = 0;
+	
+	dispatch_block_t block = ^{
+		
+        result = self->max4ReceiveSize;
+	};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_sync(socketQueue, block);
+	
+	return result;
+}
+
+- (void)setMaxReceiveIPv4BufferSize:(uint16_t)max
+{
+	dispatch_block_t block = ^{
+		
+		LogVerbose(@"%@ %u", THIS_METHOD, (unsigned)max);
+		
+        self->max4ReceiveSize = max;
+	};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_async(socketQueue, block);
+}
+
+- (uint32_t)maxReceiveIPv6BufferSize
+{
+	__block uint32_t result = 0;
+	
+	dispatch_block_t block = ^{
+		
+        result = self->max6ReceiveSize;
+	};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_sync(socketQueue, block);
+	
+	return result;
+}
+
+- (void)setMaxReceiveIPv6BufferSize:(uint32_t)max
+{
+	dispatch_block_t block = ^{
+		
+		LogVerbose(@"%@ %u", THIS_METHOD, (unsigned)max);
+		
+        self->max6ReceiveSize = max;
+	};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_async(socketQueue, block);
+}
+
+- (void)setMaxSendBufferSize:(uint16_t)max
+{
+    dispatch_block_t block = ^{
+        
+        LogVerbose(@"%@ %u", THIS_METHOD, (unsigned)max);
+        
+        self->maxSendSize = max;
+    };
+    
+    if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+        block();
+    else
+        dispatch_async(socketQueue, block);
+}
+
+- (uint16_t)maxSendBufferSize
+{
+    __block uint16_t result = 0;
+    
+    dispatch_block_t block = ^{
+        
+        result = self->maxSendSize;
+    };
+    
+    if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+        block();
+    else
+        dispatch_sync(socketQueue, block);
+    
+    return result;
+}
+
+- (id)userData
+{
+	__block id result = nil;
+	
+	dispatch_block_t block = ^{
+		
+        result = self->userData;
+	};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_sync(socketQueue, block);
+	
+	return result;
+}
+
+- (void)setUserData:(id)arbitraryUserData
+{
+	dispatch_block_t block = ^{
+		
+        if (self->userData != arbitraryUserData)
+		{
+            self->userData = arbitraryUserData;
+		}
+	};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_async(socketQueue, block);
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+#pragma mark Delegate Helpers
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+- (void)notifyDidConnectToAddress:(NSData *)anAddress
+{
+	LogTrace();
+	
+	__strong id theDelegate = delegate;
+	if (delegateQueue && [theDelegate respondsToSelector:@selector(udpSocket:didConnectToAddress:)])
+	{
+		NSData *address = [anAddress copy]; // In case param is NSMutableData
+		
+		dispatch_async(delegateQueue, ^{ @autoreleasepool {
+			
+			[theDelegate udpSocket:self didConnectToAddress:address];
+		}});
+	}
+}
+
+- (void)notifyDidNotConnect:(NSError *)error
+{
+	LogTrace();
+	
+	__strong id theDelegate = delegate;
+	if (delegateQueue && [theDelegate respondsToSelector:@selector(udpSocket:didNotConnect:)])
+	{
+		dispatch_async(delegateQueue, ^{ @autoreleasepool {
+			
+			[theDelegate udpSocket:self didNotConnect:error];
+		}});
+	}
+}
+
+- (void)notifyDidSendDataWithTag:(long)tag
+{
+	LogTrace();
+	
+	__strong id theDelegate = delegate;
+	if (delegateQueue && [theDelegate respondsToSelector:@selector(udpSocket:didSendDataWithTag:)])
+	{
+		dispatch_async(delegateQueue, ^{ @autoreleasepool {
+			
+			[theDelegate udpSocket:self didSendDataWithTag:tag];
+		}});
+	}
+}
+
+- (void)notifyDidNotSendDataWithTag:(long)tag dueToError:(NSError *)error
+{
+	LogTrace();
+	
+	__strong id theDelegate = delegate;
+	if (delegateQueue && [theDelegate respondsToSelector:@selector(udpSocket:didNotSendDataWithTag:dueToError:)])
+	{
+		dispatch_async(delegateQueue, ^{ @autoreleasepool {
+			
+			[theDelegate udpSocket:self didNotSendDataWithTag:tag dueToError:error];
+		}});
+	}
+}
+
+- (void)notifyDidReceiveData:(NSData *)data fromAddress:(NSData *)address withFilterContext:(id)context
+{
+	LogTrace();
+	
+	SEL selector = @selector(udpSocket:didReceiveData:fromAddress:withFilterContext:);
+	
+	__strong id theDelegate = delegate;
+	if (delegateQueue && [theDelegate respondsToSelector:selector])
+	{
+		dispatch_async(delegateQueue, ^{ @autoreleasepool {
+			
+			[theDelegate udpSocket:self didReceiveData:data fromAddress:address withFilterContext:context];
+		}});
+	}
+}
+
+- (void)notifyDidCloseWithError:(NSError *)error
+{
+	LogTrace();
+	
+	__strong id theDelegate = delegate;
+	if (delegateQueue && [theDelegate respondsToSelector:@selector(udpSocketDidClose:withError:)])
+	{
+		dispatch_async(delegateQueue, ^{ @autoreleasepool {
+			
+			[theDelegate udpSocketDidClose:self withError:error];
+		}});
+	}
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+#pragma mark Errors
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+- (NSError *)badConfigError:(NSString *)errMsg
+{
+	NSDictionary *userInfo = [NSDictionary dictionaryWithObject:errMsg forKey:NSLocalizedDescriptionKey];
+	
+	return [NSError errorWithDomain:GCDAsyncUdpSocketErrorDomain
+	                           code:GCDAsyncUdpSocketBadConfigError
+	                       userInfo:userInfo];
+}
+
+- (NSError *)badParamError:(NSString *)errMsg
+{
+	NSDictionary *userInfo = [NSDictionary dictionaryWithObject:errMsg forKey:NSLocalizedDescriptionKey];
+	
+	return [NSError errorWithDomain:GCDAsyncUdpSocketErrorDomain
+	                           code:GCDAsyncUdpSocketBadParamError
+	                       userInfo:userInfo];
+}
+
+- (NSError *)gaiError:(int)gai_error
+{
+	NSString *errMsg = [NSString stringWithCString:gai_strerror(gai_error) encoding:NSASCIIStringEncoding];
+	NSDictionary *userInfo = [NSDictionary dictionaryWithObject:errMsg forKey:NSLocalizedDescriptionKey];
+	
+	return [NSError errorWithDomain:@"kCFStreamErrorDomainNetDB" code:gai_error userInfo:userInfo];
+}
+
+- (NSError *)errnoErrorWithReason:(NSString *)reason
+{
+	NSString *errMsg = [NSString stringWithUTF8String:strerror(errno)];
+	NSDictionary *userInfo;
+	
+	if (reason)
+		userInfo = [NSDictionary dictionaryWithObjectsAndKeys:errMsg, NSLocalizedDescriptionKey,
+		                                                      reason, NSLocalizedFailureReasonErrorKey, nil];
+	else
+		userInfo = [NSDictionary dictionaryWithObjectsAndKeys:errMsg, NSLocalizedDescriptionKey, nil];
+	
+	return [NSError errorWithDomain:NSPOSIXErrorDomain code:errno userInfo:userInfo];
+}
+
+- (NSError *)errnoError
+{
+	return [self errnoErrorWithReason:nil];
+}
+
+/**
+ * Returns a standard send timeout error.
+**/
+- (NSError *)sendTimeoutError
+{
+	NSString *errMsg = NSLocalizedStringWithDefaultValue(@"GCDAsyncUdpSocketSendTimeoutError",
+	                                                     @"GCDAsyncUdpSocket", [NSBundle mainBundle],
+	                                                     @"Send operation timed out", nil);
+	
+	NSDictionary *userInfo = [NSDictionary dictionaryWithObject:errMsg forKey:NSLocalizedDescriptionKey];
+	
+	return [NSError errorWithDomain:GCDAsyncUdpSocketErrorDomain
+	                           code:GCDAsyncUdpSocketSendTimeoutError
+	                       userInfo:userInfo];
+}
+
+- (NSError *)socketClosedError
+{
+	NSString *errMsg = NSLocalizedStringWithDefaultValue(@"GCDAsyncUdpSocketClosedError",
+	                                                     @"GCDAsyncUdpSocket", [NSBundle mainBundle],
+	                                                     @"Socket closed", nil);
+	
+	NSDictionary *userInfo = [NSDictionary dictionaryWithObject:errMsg forKey:NSLocalizedDescriptionKey];
+	
+	return [NSError errorWithDomain:GCDAsyncUdpSocketErrorDomain code:GCDAsyncUdpSocketClosedError userInfo:userInfo];
+}
+
+- (NSError *)otherError:(NSString *)errMsg
+{
+	NSDictionary *userInfo = [NSDictionary dictionaryWithObject:errMsg forKey:NSLocalizedDescriptionKey];
+	
+	return [NSError errorWithDomain:GCDAsyncUdpSocketErrorDomain
+	                           code:GCDAsyncUdpSocketOtherError
+	                       userInfo:userInfo];
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+#pragma mark Utilities
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+- (BOOL)preOp:(NSError **)errPtr
+{
+	NSAssert(dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey), @"Must be dispatched on socketQueue");
+	
+	if (delegate == nil) // Must have delegate set
+	{
+		if (errPtr)
+		{
+			NSString *msg = @"Attempting to use socket without a delegate. Set a delegate first.";
+			*errPtr = [self badConfigError:msg];
+		}
+		return NO;
+	}
+	
+	if (delegateQueue == NULL) // Must have delegate queue set
+	{
+		if (errPtr)
+		{
+			NSString *msg = @"Attempting to use socket without a delegate queue. Set a delegate queue first.";
+			*errPtr = [self badConfigError:msg];
+		}
+		return NO;
+	}
+	
+	return YES;
+}
+
+/**
+ * This method executes on a global concurrent queue.
+ * When complete, it executes the given completion block on the socketQueue.
+**/
+- (void)asyncResolveHost:(NSString *)aHost
+                    port:(uint16_t)port
+     withCompletionBlock:(void (^)(NSArray *addresses, NSError *error))completionBlock
+{
+	LogTrace();
+	
+	// Check parameter(s)
+	
+	if (aHost == nil)
+	{
+		NSString *msg = @"The host param is nil. Should be domain name or IP address string.";
+		NSError *error = [self badParamError:msg];
+		
+		// We should still use dispatch_async since this method is expected to be asynchronous
+		
+		dispatch_async(socketQueue, ^{ @autoreleasepool {
+			
+			completionBlock(nil, error);
+		}});
+		
+		return;
+	}
+	
+	// It's possible that the given aHost parameter is actually a NSMutableString.
+	// So we want to copy it now, within this block that will be executed synchronously.
+	// This way the asynchronous lookup block below doesn't have to worry about it changing.
+	
+	NSString *host = [aHost copy];
+	
+	
+	dispatch_queue_t globalConcurrentQueue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
+	dispatch_async(globalConcurrentQueue, ^{ @autoreleasepool {
+		
+		NSMutableArray *addresses = [NSMutableArray arrayWithCapacity:2];
+		NSError *error = nil;
+		
+		if ([host isEqualToString:@"localhost"] || [host isEqualToString:@"loopback"])
+		{
+			// Use LOOPBACK address
+			struct sockaddr_in sockaddr4;
+			memset(&sockaddr4, 0, sizeof(sockaddr4));
+			
+			sockaddr4.sin_len         = sizeof(struct sockaddr_in);
+			sockaddr4.sin_family      = AF_INET;
+			sockaddr4.sin_port        = htons(port);
+			sockaddr4.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
+			
+			struct sockaddr_in6 sockaddr6;
+			memset(&sockaddr6, 0, sizeof(sockaddr6));
+			
+			sockaddr6.sin6_len       = sizeof(struct sockaddr_in6);
+			sockaddr6.sin6_family    = AF_INET6;
+			sockaddr6.sin6_port      = htons(port);
+			sockaddr6.sin6_addr      = in6addr_loopback;
+			
+			// Wrap the native address structures and add to list
+			[addresses addObject:[NSData dataWithBytes:&sockaddr4 length:sizeof(sockaddr4)]];
+			[addresses addObject:[NSData dataWithBytes:&sockaddr6 length:sizeof(sockaddr6)]];
+		}
+		else
+		{
+			NSString *portStr = [NSString stringWithFormat:@"%hu", port];
+			
+			struct addrinfo hints, *res, *res0;
+			
+			memset(&hints, 0, sizeof(hints));
+			hints.ai_family   = PF_UNSPEC;
+			hints.ai_socktype = SOCK_DGRAM;
+			hints.ai_protocol = IPPROTO_UDP;
+			
+			int gai_error = getaddrinfo([host UTF8String], [portStr UTF8String], &hints, &res0);
+			
+			if (gai_error)
+			{
+				error = [self gaiError:gai_error];
+			}
+			else
+			{
+				for(res = res0; res; res = res->ai_next)
+				{
+					if (res->ai_family == AF_INET)
+					{
+						// Found IPv4 address
+						// Wrap the native address structure and add to list
+						
+						[addresses addObject:[NSData dataWithBytes:res->ai_addr length:res->ai_addrlen]];
+					}
+					else if (res->ai_family == AF_INET6)
+					{
+
+                        // Fixes connection issues with IPv6, it is the same solution for udp socket.
+                        // https://github.com/robbiehanson/CocoaAsyncSocket/issues/429#issuecomment-222477158
+                        struct sockaddr_in6 *sockaddr = (struct sockaddr_in6 *)res->ai_addr;
+                        in_port_t *portPtr = &sockaddr->sin6_port;
+                        if ((portPtr != NULL) && (*portPtr == 0)) {
+                            *portPtr = htons(port);
+                        }
+
+                        // Found IPv6 address
+                        // Wrap the native address structure and add to list
+						[addresses addObject:[NSData dataWithBytes:res->ai_addr length:res->ai_addrlen]];
+					}
+				}
+				freeaddrinfo(res0);
+				
+				if ([addresses count] == 0)
+				{
+					error = [self gaiError:EAI_FAIL];
+				}
+			}
+		}
+		
+        dispatch_async(self->socketQueue, ^{ @autoreleasepool {
+			
+			completionBlock(addresses, error);
+		}});
+		
+	}});
+}
+
+/**
+ * This method picks an address from the given list of addresses.
+ * The address picked depends upon which protocols are disabled, deactived, & preferred.
+ * 
+ * Returns the address family (AF_INET or AF_INET6) of the picked address,
+ * or AF_UNSPEC and the corresponding error is there's a problem.
+**/
+- (int)getAddress:(NSData **)addressPtr error:(NSError **)errorPtr fromAddresses:(NSArray *)addresses
+{
+	NSAssert(dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey), @"Must be dispatched on socketQueue");
+	NSAssert([addresses count] > 0, @"Expected at least one address");
+	
+	int resultAF = AF_UNSPEC;
+	NSData *resultAddress = nil;
+	NSError *resultError = nil;
+	
+	// Check for problems
+	
+	BOOL resolvedIPv4Address = NO;
+	BOOL resolvedIPv6Address = NO;
+	
+	for (NSData *address in addresses)
+	{
+		switch ([[self class] familyFromAddress:address])
+		{
+			case AF_INET  : resolvedIPv4Address = YES; break;
+			case AF_INET6 : resolvedIPv6Address = YES; break;
+			
+			default       : NSAssert(NO, @"Addresses array contains invalid address");
+		}
+	}
+	
+	BOOL isIPv4Disabled = (config & kIPv4Disabled) ? YES : NO;
+	BOOL isIPv6Disabled = (config & kIPv6Disabled) ? YES : NO;
+	
+	if (isIPv4Disabled && !resolvedIPv6Address)
+	{
+		NSString *msg = @"IPv4 has been disabled and DNS lookup found no IPv6 address(es).";
+		resultError = [self otherError:msg];
+		
+		if (addressPtr) *addressPtr = resultAddress;
+		if (errorPtr) *errorPtr = resultError;
+		
+		return resultAF;
+	}
+	
+	if (isIPv6Disabled && !resolvedIPv4Address)
+	{
+		NSString *msg = @"IPv6 has been disabled and DNS lookup found no IPv4 address(es).";
+		resultError = [self otherError:msg];
+		
+		if (addressPtr) *addressPtr = resultAddress;
+		if (errorPtr) *errorPtr = resultError;
+		
+		return resultAF;
+	}
+	
+	BOOL isIPv4Deactivated = (flags & kIPv4Deactivated) ? YES : NO;
+	BOOL isIPv6Deactivated = (flags & kIPv6Deactivated) ? YES : NO;
+	
+	if (isIPv4Deactivated && !resolvedIPv6Address)
+	{
+		NSString *msg = @"IPv4 has been deactivated due to bind/connect, and DNS lookup found no IPv6 address(es).";
+		resultError = [self otherError:msg];
+		
+		if (addressPtr) *addressPtr = resultAddress;
+		if (errorPtr) *errorPtr = resultError;
+		
+		return resultAF;
+	}
+	
+	if (isIPv6Deactivated && !resolvedIPv4Address)
+	{
+		NSString *msg = @"IPv6 has been deactivated due to bind/connect, and DNS lookup found no IPv4 address(es).";
+		resultError = [self otherError:msg];
+		
+		if (addressPtr) *addressPtr = resultAddress;
+		if (errorPtr) *errorPtr = resultError;
+		
+		return resultAF;
+	}
+	
+	// Extract first IPv4 and IPv6 address in list
+	
+	BOOL ipv4WasFirstInList = YES;
+	NSData *address4 = nil;
+	NSData *address6 = nil;
+	
+	for (NSData *address in addresses)
+	{
+		int af = [[self class] familyFromAddress:address];
+		
+		if (af == AF_INET)
+		{
+			if (address4 == nil)
+			{
+				address4 = address;
+				
+				if (address6)
+					break;
+				else
+					ipv4WasFirstInList = YES;
+			}
+		}
+		else // af == AF_INET6
+		{
+			if (address6 == nil)
+			{
+				address6 = address;
+				
+				if (address4)
+					break;
+				else
+					ipv4WasFirstInList = NO;
+			}
+		}
+	}
+	
+	// Determine socket type
+	
+	BOOL preferIPv4 = (config & kPreferIPv4) ? YES : NO;
+	BOOL preferIPv6 = (config & kPreferIPv6) ? YES : NO;
+	
+	BOOL useIPv4 = ((preferIPv4 && address4) || (address6 == nil));
+	BOOL useIPv6 = ((preferIPv6 && address6) || (address4 == nil));
+	
+	NSAssert(!(preferIPv4 && preferIPv6), @"Invalid config state");
+	NSAssert(!(useIPv4 && useIPv6), @"Invalid logic");
+	
+	if (useIPv4 || (!useIPv6 && ipv4WasFirstInList))
+	{
+		resultAF = AF_INET;
+		resultAddress = address4;
+	}
+	else
+	{
+		resultAF = AF_INET6;
+		resultAddress = address6;
+	}
+	
+	if (addressPtr) *addressPtr = resultAddress;
+	if (errorPtr) *errorPtr = resultError;
+		
+	return resultAF;
+}
+
+/**
+ * Finds the address(es) of an interface description.
+ * An inteface description may be an interface name (en0, en1, lo0) or corresponding IP (192.168.4.34).
+**/
+- (void)convertIntefaceDescription:(NSString *)interfaceDescription
+                              port:(uint16_t)port
+                      intoAddress4:(NSData **)interfaceAddr4Ptr
+                          address6:(NSData **)interfaceAddr6Ptr
+{
+	NSData *addr4 = nil;
+	NSData *addr6 = nil;
+	
+	if (interfaceDescription == nil)
+	{
+		// ANY address
+		
+		struct sockaddr_in sockaddr4;
+		memset(&sockaddr4, 0, sizeof(sockaddr4));
+		
+		sockaddr4.sin_len         = sizeof(sockaddr4);
+		sockaddr4.sin_family      = AF_INET;
+		sockaddr4.sin_port        = htons(port);
+		sockaddr4.sin_addr.s_addr = htonl(INADDR_ANY);
+		
+		struct sockaddr_in6 sockaddr6;
+		memset(&sockaddr6, 0, sizeof(sockaddr6));
+		
+		sockaddr6.sin6_len       = sizeof(sockaddr6);
+		sockaddr6.sin6_family    = AF_INET6;
+		sockaddr6.sin6_port      = htons(port);
+		sockaddr6.sin6_addr      = in6addr_any;
+		
+		addr4 = [NSData dataWithBytes:&sockaddr4 length:sizeof(sockaddr4)];
+		addr6 = [NSData dataWithBytes:&sockaddr6 length:sizeof(sockaddr6)];
+	}
+	else if ([interfaceDescription isEqualToString:@"localhost"] ||
+	         [interfaceDescription isEqualToString:@"loopback"])
+	{
+		// LOOPBACK address
+		
+		struct sockaddr_in sockaddr4;
+		memset(&sockaddr4, 0, sizeof(sockaddr4));
+		
+		sockaddr4.sin_len         = sizeof(struct sockaddr_in);
+		sockaddr4.sin_family      = AF_INET;
+		sockaddr4.sin_port        = htons(port);
+		sockaddr4.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
+		
+		struct sockaddr_in6 sockaddr6;
+		memset(&sockaddr6, 0, sizeof(sockaddr6));
+		
+		sockaddr6.sin6_len       = sizeof(struct sockaddr_in6);
+		sockaddr6.sin6_family    = AF_INET6;
+		sockaddr6.sin6_port      = htons(port);
+		sockaddr6.sin6_addr      = in6addr_loopback;
+		
+		addr4 = [NSData dataWithBytes:&sockaddr4 length:sizeof(sockaddr4)];
+		addr6 = [NSData dataWithBytes:&sockaddr6 length:sizeof(sockaddr6)];
+	}
+	else
+	{
+		const char *iface = [interfaceDescription UTF8String];
+		
+		struct ifaddrs *addrs;
+		const struct ifaddrs *cursor;
+		
+		if ((getifaddrs(&addrs) == 0))
+		{
+			cursor = addrs;
+			while (cursor != NULL)
+			{
+				if ((addr4 == nil) && (cursor->ifa_addr->sa_family == AF_INET))
+				{
+					// IPv4
+					
+					struct sockaddr_in *addr = (struct sockaddr_in *)cursor->ifa_addr;
+					
+					if (strcmp(cursor->ifa_name, iface) == 0)
+					{
+						// Name match
+						
+						struct sockaddr_in nativeAddr4 = *addr;
+						nativeAddr4.sin_port = htons(port);
+						
+						addr4 = [NSData dataWithBytes:&nativeAddr4 length:sizeof(nativeAddr4)];
+					}
+					else
+					{
+						char ip[INET_ADDRSTRLEN];
+						
+						const char *conversion;
+						conversion = inet_ntop(AF_INET, &addr->sin_addr, ip, sizeof(ip));
+						
+						if ((conversion != NULL) && (strcmp(ip, iface) == 0))
+						{
+							// IP match
+							
+							struct sockaddr_in nativeAddr4 = *addr;
+							nativeAddr4.sin_port = htons(port);
+							
+							addr4 = [NSData dataWithBytes:&nativeAddr4 length:sizeof(nativeAddr4)];
+						}
+					}
+				}
+				else if ((addr6 == nil) && (cursor->ifa_addr->sa_family == AF_INET6))
+				{
+					// IPv6
+					
+					struct sockaddr_in6 *addr = (struct sockaddr_in6 *)cursor->ifa_addr;
+					
+					if (strcmp(cursor->ifa_name, iface) == 0)
+					{
+						// Name match
+						
+						struct sockaddr_in6 nativeAddr6 = *addr;
+						nativeAddr6.sin6_port = htons(port);
+						
+						addr6 = [NSData dataWithBytes:&nativeAddr6 length:sizeof(nativeAddr6)];
+					}
+					else
+					{
+						char ip[INET6_ADDRSTRLEN];
+						
+						const char *conversion;
+						conversion = inet_ntop(AF_INET6, &addr->sin6_addr, ip, sizeof(ip));
+						
+						if ((conversion != NULL) && (strcmp(ip, iface) == 0))
+						{
+							// IP match
+							
+							struct sockaddr_in6 nativeAddr6 = *addr;
+							nativeAddr6.sin6_port = htons(port);
+							
+							addr6 = [NSData dataWithBytes:&nativeAddr6 length:sizeof(nativeAddr6)];
+						}
+					}
+				}
+				
+				cursor = cursor->ifa_next;
+			}
+			
+			freeifaddrs(addrs);
+		}
+	}
+	
+	if (interfaceAddr4Ptr) *interfaceAddr4Ptr = addr4;
+	if (interfaceAddr6Ptr) *interfaceAddr6Ptr = addr6;
+}
+
+/**
+ * Converts a numeric hostname into its corresponding address.
+ * The hostname is expected to be an IPv4 or IPv6 address represented as a human-readable string. (e.g. 192.168.4.34)
+**/
+- (void)convertNumericHost:(NSString *)numericHost
+                      port:(uint16_t)port
+              intoAddress4:(NSData **)addr4Ptr
+                  address6:(NSData **)addr6Ptr
+{
+	NSData *addr4 = nil;
+	NSData *addr6 = nil;
+	
+	if (numericHost)
+	{
+		NSString *portStr = [NSString stringWithFormat:@"%hu", port];
+		
+		struct addrinfo hints, *res, *res0;
+		
+		memset(&hints, 0, sizeof(hints));
+		hints.ai_family   = PF_UNSPEC;
+		hints.ai_socktype = SOCK_DGRAM;
+		hints.ai_protocol = IPPROTO_UDP;
+		hints.ai_flags    = AI_NUMERICHOST; // No name resolution should be attempted
+		
+		if (getaddrinfo([numericHost UTF8String], [portStr UTF8String], &hints, &res0) == 0)
+		{
+			for (res = res0; res; res = res->ai_next)
+			{
+				if ((addr4 == nil) && (res->ai_family == AF_INET))
+				{
+					// Found IPv4 address
+					// Wrap the native address structure
+					addr4 = [NSData dataWithBytes:res->ai_addr length:res->ai_addrlen];
+				}
+				else if ((addr6 == nil) && (res->ai_family == AF_INET6))
+				{
+					// Found IPv6 address
+					// Wrap the native address structure
+					addr6 = [NSData dataWithBytes:res->ai_addr length:res->ai_addrlen];
+				}
+			}
+			freeaddrinfo(res0);
+		}
+	}
+	
+	if (addr4Ptr) *addr4Ptr = addr4;
+	if (addr6Ptr) *addr6Ptr = addr6;
+}
+
+- (BOOL)isConnectedToAddress4:(NSData *)someAddr4
+{
+	NSAssert(dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey), @"Must be dispatched on socketQueue");
+	NSAssert(flags & kDidConnect, @"Not connected");
+	NSAssert(cachedConnectedAddress, @"Expected cached connected address");
+	
+	if (cachedConnectedFamily != AF_INET)
+	{
+		return NO;
+	}
+	
+	const struct sockaddr_in *sSockaddr4 = (struct sockaddr_in *)[someAddr4 bytes];
+	const struct sockaddr_in *cSockaddr4 = (struct sockaddr_in *)[cachedConnectedAddress bytes];
+	
+	if (memcmp(&sSockaddr4->sin_addr, &cSockaddr4->sin_addr, sizeof(struct in_addr)) != 0)
+	{
+		return NO;
+	}
+	if (memcmp(&sSockaddr4->sin_port, &cSockaddr4->sin_port, sizeof(in_port_t)) != 0)
+	{
+		return NO;
+	}
+	
+	return YES;
+}
+
+- (BOOL)isConnectedToAddress6:(NSData *)someAddr6
+{
+	NSAssert(dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey), @"Must be dispatched on socketQueue");
+	NSAssert(flags & kDidConnect, @"Not connected");
+	NSAssert(cachedConnectedAddress, @"Expected cached connected address");
+	
+	if (cachedConnectedFamily != AF_INET6)
+	{
+		return NO;
+	}
+	
+	const struct sockaddr_in6 *sSockaddr6 = (struct sockaddr_in6 *)[someAddr6 bytes];
+	const struct sockaddr_in6 *cSockaddr6 = (struct sockaddr_in6 *)[cachedConnectedAddress bytes];
+	
+	if (memcmp(&sSockaddr6->sin6_addr, &cSockaddr6->sin6_addr, sizeof(struct in6_addr)) != 0)
+	{
+		return NO;
+	}
+	if (memcmp(&sSockaddr6->sin6_port, &cSockaddr6->sin6_port, sizeof(in_port_t)) != 0)
+	{
+		return NO;
+	}
+	
+	return YES;
+}
+
+- (unsigned int)indexOfInterfaceAddr4:(NSData *)interfaceAddr4
+{
+	if (interfaceAddr4 == nil)
+		return 0;
+	if ([interfaceAddr4 length] != sizeof(struct sockaddr_in))
+		return 0;
+	
+	int result = 0;
+	struct sockaddr_in *ifaceAddr = (struct sockaddr_in *)[interfaceAddr4 bytes];
+	
+	struct ifaddrs *addrs;
+	const struct ifaddrs *cursor;
+	
+	if ((getifaddrs(&addrs) == 0))
+	{
+		cursor = addrs;
+		while (cursor != NULL)
+		{
+			if (cursor->ifa_addr->sa_family == AF_INET)
+			{
+				// IPv4
+				
+				struct sockaddr_in *addr = (struct sockaddr_in *)cursor->ifa_addr;
+				
+				if (memcmp(&addr->sin_addr, &ifaceAddr->sin_addr, sizeof(struct in_addr)) == 0)
+				{
+					result = if_nametoindex(cursor->ifa_name);
+					break;
+				}
+			}
+			
+			cursor = cursor->ifa_next;
+		}
+		
+		freeifaddrs(addrs);
+	}
+	
+	return result;
+}
+
+- (unsigned int)indexOfInterfaceAddr6:(NSData *)interfaceAddr6
+{
+	if (interfaceAddr6 == nil)
+		return 0;
+	if ([interfaceAddr6 length] != sizeof(struct sockaddr_in6))
+		return 0;
+	
+	int result = 0;
+	struct sockaddr_in6 *ifaceAddr = (struct sockaddr_in6 *)[interfaceAddr6 bytes];
+	
+	struct ifaddrs *addrs;
+	const struct ifaddrs *cursor;
+	
+	if ((getifaddrs(&addrs) == 0))
+	{
+		cursor = addrs;
+		while (cursor != NULL)
+		{
+			if (cursor->ifa_addr->sa_family == AF_INET6)
+			{
+				// IPv6
+				
+				struct sockaddr_in6 *addr = (struct sockaddr_in6 *)cursor->ifa_addr;
+				
+				if (memcmp(&addr->sin6_addr, &ifaceAddr->sin6_addr, sizeof(struct in6_addr)) == 0)
+				{
+					result = if_nametoindex(cursor->ifa_name);
+					break;
+				}
+			}
+			
+			cursor = cursor->ifa_next;
+		}
+		
+		freeifaddrs(addrs);
+	}
+	
+	return result;
+}
+
+- (void)setupSendAndReceiveSourcesForSocket4
+{
+	LogTrace();
+	NSAssert(dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey), @"Must be dispatched on socketQueue");
+	
+	send4Source = dispatch_source_create(DISPATCH_SOURCE_TYPE_WRITE, socket4FD, 0, socketQueue);
+	receive4Source = dispatch_source_create(DISPATCH_SOURCE_TYPE_READ, socket4FD, 0, socketQueue);
+	
+	// Setup event handlers
+	
+	dispatch_source_set_event_handler(send4Source, ^{ @autoreleasepool {
+		
+		LogVerbose(@"send4EventBlock");
+		LogVerbose(@"dispatch_source_get_data(send4Source) = %lu", dispatch_source_get_data(send4Source));
+		
+        self->flags |= kSock4CanAcceptBytes;
+		
+		// If we're ready to send data, do so immediately.
+		// Otherwise pause the send source or it will continue to fire over and over again.
+		
+        if (self->currentSend == nil)
+		{
+			LogVerbose(@"Nothing to send");
+			[self suspendSend4Source];
+		}
+        else if (self->currentSend->resolveInProgress)
+		{
+			LogVerbose(@"currentSend - waiting for address resolve");
+			[self suspendSend4Source];
+		}
+        else if (self->currentSend->filterInProgress)
+		{
+			LogVerbose(@"currentSend - waiting on sendFilter");
+			[self suspendSend4Source];
+		}
+		else
+		{
+			[self doSend];
+		}
+		
+	}});
+	
+	dispatch_source_set_event_handler(receive4Source, ^{ @autoreleasepool {
+		
+		LogVerbose(@"receive4EventBlock");
+		
+        self->socket4FDBytesAvailable = dispatch_source_get_data(self->receive4Source);
+		LogVerbose(@"socket4FDBytesAvailable: %lu", socket4FDBytesAvailable);
+		
+        if (self->socket4FDBytesAvailable > 0)
+			[self doReceive];
+		else
+			[self doReceiveEOF];
+		
+	}});
+	
+	// Setup cancel handlers
+	
+	__block int socketFDRefCount = 2;
+	
+	int theSocketFD = socket4FD;
+	
+	#if !OS_OBJECT_USE_OBJC
+	dispatch_source_t theSendSource = send4Source;
+	dispatch_source_t theReceiveSource = receive4Source;
+	#endif
+	
+	dispatch_source_set_cancel_handler(send4Source, ^{
+		
+		LogVerbose(@"send4CancelBlock");
+		
+		#if !OS_OBJECT_USE_OBJC
+		LogVerbose(@"dispatch_release(send4Source)");
+		dispatch_release(theSendSource);
+		#endif
+		
+		if (--socketFDRefCount == 0)
+		{
+			LogVerbose(@"close(socket4FD)");
+			close(theSocketFD);
+		}
+	});
+	
+	dispatch_source_set_cancel_handler(receive4Source, ^{
+		
+		LogVerbose(@"receive4CancelBlock");
+		
+		#if !OS_OBJECT_USE_OBJC
+		LogVerbose(@"dispatch_release(receive4Source)");
+		dispatch_release(theReceiveSource);
+		#endif
+		
+		if (--socketFDRefCount == 0)
+		{
+			LogVerbose(@"close(socket4FD)");
+			close(theSocketFD);
+		}
+	});
+	
+	// We will not be able to receive until the socket is bound to a port,
+	// either explicitly via bind, or implicitly by connect or by sending data.
+	// 
+	// But we should be able to send immediately.
+	
+	socket4FDBytesAvailable = 0;
+	flags |= kSock4CanAcceptBytes;
+	
+	flags |= kSend4SourceSuspended;
+	flags |= kReceive4SourceSuspended;
+}
+
+- (void)setupSendAndReceiveSourcesForSocket6
+{
+	LogTrace();
+	NSAssert(dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey), @"Must be dispatched on socketQueue");
+	
+	send6Source = dispatch_source_create(DISPATCH_SOURCE_TYPE_WRITE, socket6FD, 0, socketQueue);
+	receive6Source = dispatch_source_create(DISPATCH_SOURCE_TYPE_READ, socket6FD, 0, socketQueue);
+	
+	// Setup event handlers
+	
+	dispatch_source_set_event_handler(send6Source, ^{ @autoreleasepool {
+		
+		LogVerbose(@"send6EventBlock");
+		LogVerbose(@"dispatch_source_get_data(send6Source) = %lu", dispatch_source_get_data(send6Source));
+		
+        self->flags |= kSock6CanAcceptBytes;
+		
+		// If we're ready to send data, do so immediately.
+		// Otherwise pause the send source or it will continue to fire over and over again.
+		
+        if (self->currentSend == nil)
+		{
+			LogVerbose(@"Nothing to send");
+			[self suspendSend6Source];
+		}
+        else if (self->currentSend->resolveInProgress)
+		{
+			LogVerbose(@"currentSend - waiting for address resolve");
+			[self suspendSend6Source];
+		}
+        else if (self->currentSend->filterInProgress)
+		{
+			LogVerbose(@"currentSend - waiting on sendFilter");
+			[self suspendSend6Source];
+		}
+		else
+		{
+			[self doSend];
+		}
+		
+	}});
+	
+	dispatch_source_set_event_handler(receive6Source, ^{ @autoreleasepool {
+		
+		LogVerbose(@"receive6EventBlock");
+		
+        self->socket6FDBytesAvailable = dispatch_source_get_data(self->receive6Source);
+		LogVerbose(@"socket6FDBytesAvailable: %lu", socket6FDBytesAvailable);
+		
+        if (self->socket6FDBytesAvailable > 0)
+			[self doReceive];
+		else
+			[self doReceiveEOF];
+		
+	}});
+	
+	// Setup cancel handlers
+	
+	__block int socketFDRefCount = 2;
+	
+	int theSocketFD = socket6FD;
+	
+	#if !OS_OBJECT_USE_OBJC
+	dispatch_source_t theSendSource = send6Source;
+	dispatch_source_t theReceiveSource = receive6Source;
+	#endif
+	
+	dispatch_source_set_cancel_handler(send6Source, ^{
+		
+		LogVerbose(@"send6CancelBlock");
+		
+		#if !OS_OBJECT_USE_OBJC
+		LogVerbose(@"dispatch_release(send6Source)");
+		dispatch_release(theSendSource);
+		#endif
+		
+		if (--socketFDRefCount == 0)
+		{
+			LogVerbose(@"close(socket6FD)");
+			close(theSocketFD);
+		}
+	});
+	
+	dispatch_source_set_cancel_handler(receive6Source, ^{
+		
+		LogVerbose(@"receive6CancelBlock");
+		
+		#if !OS_OBJECT_USE_OBJC
+		LogVerbose(@"dispatch_release(receive6Source)");
+		dispatch_release(theReceiveSource);
+		#endif
+		
+		if (--socketFDRefCount == 0)
+		{
+			LogVerbose(@"close(socket6FD)");
+			close(theSocketFD);
+		}
+	});
+	
+	// We will not be able to receive until the socket is bound to a port,
+	// either explicitly via bind, or implicitly by connect or by sending data.
+	// 
+	// But we should be able to send immediately.
+	
+	socket6FDBytesAvailable = 0;
+	flags |= kSock6CanAcceptBytes;
+	
+	flags |= kSend6SourceSuspended;
+	flags |= kReceive6SourceSuspended;
+}
+
+- (BOOL)createSocket4:(BOOL)useIPv4 socket6:(BOOL)useIPv6 error:(NSError * __autoreleasing *)errPtr
+{
+	LogTrace();
+	
+	NSAssert(dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey), @"Must be dispatched on socketQueue");
+	NSAssert(((flags & kDidCreateSockets) == 0), @"Sockets have already been created");
+	
+	// CreateSocket Block
+	// This block will be invoked below.
+	
+	int(^createSocket)(int) = ^int (int domain) {
+		
+		int socketFD = socket(domain, SOCK_DGRAM, 0);
+		
+		if (socketFD == SOCKET_NULL)
+		{
+			if (errPtr)
+				*errPtr = [self errnoErrorWithReason:@"Error in socket() function"];
+			
+			return SOCKET_NULL;
+		}
+		
+		int status;
+		
+		// Set socket options
+		
+		status = fcntl(socketFD, F_SETFL, O_NONBLOCK);
+		if (status == -1)
+		{
+			if (errPtr)
+				*errPtr = [self errnoErrorWithReason:@"Error enabling non-blocking IO on socket (fcntl)"];
+			
+			close(socketFD);
+			return SOCKET_NULL;
+		}
+		
+		int reuseaddr = 1;
+		status = setsockopt(socketFD, SOL_SOCKET, SO_REUSEADDR, &reuseaddr, sizeof(reuseaddr));
+		if (status == -1)
+		{
+			if (errPtr)
+				*errPtr = [self errnoErrorWithReason:@"Error enabling address reuse (setsockopt)"];
+			
+			close(socketFD);
+			return SOCKET_NULL;
+		}
+		
+		int nosigpipe = 1;
+		status = setsockopt(socketFD, SOL_SOCKET, SO_NOSIGPIPE, &nosigpipe, sizeof(nosigpipe));
+		if (status == -1)
+		{
+			if (errPtr)
+				*errPtr = [self errnoErrorWithReason:@"Error disabling sigpipe (setsockopt)"];
+			
+			close(socketFD);
+			return SOCKET_NULL;
+		}
+        
+        /**
+         * The theoretical maximum size of any IPv4 UDP packet is UINT16_MAX = 65535.
+         * The theoretical maximum size of any IPv6 UDP packet is UINT32_MAX = 4294967295.
+         *
+         * The default maximum size of the UDP buffer in iOS is 9216 bytes.
+         *
+         * This is the reason of #222(GCD does not necessarily return the size of an entire UDP packet) and
+         *  #535(GCDAsyncUDPSocket can not send data when data is greater than 9K)
+         *
+         *
+         * Enlarge the maximum size of UDP packet.
+         * I can not ensure the protocol type now so that the max size is set to 65535 :)
+         **/
+      
+        status = setsockopt(socketFD, SOL_SOCKET, SO_SNDBUF, (const char*)&self->maxSendSize, sizeof(int));
+        if (status == -1)
+        {
+            if (errPtr)
+                *errPtr = [self errnoErrorWithReason:@"Error setting send buffer size (setsockopt)"];
+            close(socketFD);
+            return SOCKET_NULL;
+        }
+        
+        status = setsockopt(socketFD, SOL_SOCKET, SO_RCVBUF, (const char*)&self->maxSendSize, sizeof(int));
+        if (status == -1)
+        {
+            if (errPtr)
+                *errPtr = [self errnoErrorWithReason:@"Error setting receive buffer size (setsockopt)"];
+            close(socketFD);
+            return SOCKET_NULL;
+        }
+
+		
+		return socketFD;
+	};
+	
+	// Create sockets depending upon given configuration.
+	
+	if (useIPv4)
+	{
+		LogVerbose(@"Creating IPv4 socket");
+		
+		socket4FD = createSocket(AF_INET);
+		if (socket4FD == SOCKET_NULL)
+		{
+			// errPtr set in local createSocket() block
+			return NO;
+		}
+	}
+	
+	if (useIPv6)
+	{
+		LogVerbose(@"Creating IPv6 socket");
+		
+		socket6FD = createSocket(AF_INET6);
+		if (socket6FD == SOCKET_NULL)
+		{
+			// errPtr set in local createSocket() block
+			
+			if (socket4FD != SOCKET_NULL)
+			{
+				close(socket4FD);
+				socket4FD = SOCKET_NULL;
+			}
+			
+			return NO;
+		}
+	}
+	
+	// Setup send and receive sources
+	
+	if (useIPv4)
+		[self setupSendAndReceiveSourcesForSocket4];
+	if (useIPv6)
+		[self setupSendAndReceiveSourcesForSocket6];
+	
+	flags |= kDidCreateSockets;
+	return YES;
+}
+
+- (BOOL)createSockets:(NSError **)errPtr
+{
+	LogTrace();
+	
+	BOOL useIPv4 = [self isIPv4Enabled];
+	BOOL useIPv6 = [self isIPv6Enabled];
+	
+	return [self createSocket4:useIPv4 socket6:useIPv6 error:errPtr];
+}
+
+- (void)suspendSend4Source
+{
+	if (send4Source && !(flags & kSend4SourceSuspended))
+	{
+		LogVerbose(@"dispatch_suspend(send4Source)");
+		
+		dispatch_suspend(send4Source);
+		flags |= kSend4SourceSuspended;
+	}
+}
+
+- (void)suspendSend6Source
+{
+	if (send6Source && !(flags & kSend6SourceSuspended))
+	{
+		LogVerbose(@"dispatch_suspend(send6Source)");
+		
+		dispatch_suspend(send6Source);
+		flags |= kSend6SourceSuspended;
+	}
+}
+
+- (void)resumeSend4Source
+{
+	if (send4Source && (flags & kSend4SourceSuspended))
+	{
+		LogVerbose(@"dispatch_resume(send4Source)");
+		
+		dispatch_resume(send4Source);
+		flags &= ~kSend4SourceSuspended;
+	}
+}
+
+- (void)resumeSend6Source
+{
+	if (send6Source && (flags & kSend6SourceSuspended))
+	{
+		LogVerbose(@"dispatch_resume(send6Source)");
+		
+		dispatch_resume(send6Source);
+		flags &= ~kSend6SourceSuspended;
+	}
+}
+
+- (void)suspendReceive4Source
+{
+	if (receive4Source && !(flags & kReceive4SourceSuspended))
+	{
+		LogVerbose(@"dispatch_suspend(receive4Source)");
+		
+		dispatch_suspend(receive4Source);
+		flags |= kReceive4SourceSuspended;
+	}
+}
+
+- (void)suspendReceive6Source
+{
+	if (receive6Source && !(flags & kReceive6SourceSuspended))
+	{
+		LogVerbose(@"dispatch_suspend(receive6Source)");
+		
+		dispatch_suspend(receive6Source);
+		flags |= kReceive6SourceSuspended;
+	}
+}
+
+- (void)resumeReceive4Source
+{
+	if (receive4Source && (flags & kReceive4SourceSuspended))
+	{
+		LogVerbose(@"dispatch_resume(receive4Source)");
+		
+		dispatch_resume(receive4Source);
+		flags &= ~kReceive4SourceSuspended;
+	}
+}
+
+- (void)resumeReceive6Source
+{
+	if (receive6Source && (flags & kReceive6SourceSuspended))
+	{
+		LogVerbose(@"dispatch_resume(receive6Source)");
+		
+		dispatch_resume(receive6Source);
+		flags &= ~kReceive6SourceSuspended;
+	}
+}
+
+- (void)closeSocket4
+{
+	if (socket4FD != SOCKET_NULL)
+	{
+		LogVerbose(@"dispatch_source_cancel(send4Source)");
+		dispatch_source_cancel(send4Source);
+		
+		LogVerbose(@"dispatch_source_cancel(receive4Source)");
+		dispatch_source_cancel(receive4Source);
+		
+		// For some crazy reason (in my opinion), cancelling a dispatch source doesn't
+		// invoke the cancel handler if the dispatch source is paused.
+		// So we have to unpause the source if needed.
+		// This allows the cancel handler to be run, which in turn releases the source and closes the socket.
+		
+		[self resumeSend4Source];
+		[self resumeReceive4Source];
+		
+		// The sockets will be closed by the cancel handlers of the corresponding source
+		
+		send4Source = NULL;
+		receive4Source = NULL;
+		
+		socket4FD = SOCKET_NULL;
+		
+		// Clear socket states
+		
+		socket4FDBytesAvailable = 0;
+		flags &= ~kSock4CanAcceptBytes;
+		
+		// Clear cached info
+		
+		cachedLocalAddress4 = nil;
+		cachedLocalHost4 = nil;
+		cachedLocalPort4 = 0;
+	}
+}
+
+- (void)closeSocket6
+{
+	if (socket6FD != SOCKET_NULL)
+	{
+		LogVerbose(@"dispatch_source_cancel(send6Source)");
+		dispatch_source_cancel(send6Source);
+		
+		LogVerbose(@"dispatch_source_cancel(receive6Source)");
+		dispatch_source_cancel(receive6Source);
+		
+		// For some crazy reason (in my opinion), cancelling a dispatch source doesn't
+		// invoke the cancel handler if the dispatch source is paused.
+		// So we have to unpause the source if needed.
+		// This allows the cancel handler to be run, which in turn releases the source and closes the socket.
+		
+		[self resumeSend6Source];
+		[self resumeReceive6Source];
+		
+		send6Source = NULL;
+		receive6Source = NULL;
+		
+		// The sockets will be closed by the cancel handlers of the corresponding source
+		
+		socket6FD = SOCKET_NULL;
+		
+		// Clear socket states
+		
+		socket6FDBytesAvailable = 0;
+		flags &= ~kSock6CanAcceptBytes;
+		
+		// Clear cached info
+		
+		cachedLocalAddress6 = nil;
+		cachedLocalHost6 = nil;
+		cachedLocalPort6 = 0;
+	}
+}
+
+- (void)closeSockets
+{
+	[self closeSocket4];
+	[self closeSocket6];
+	
+	flags &= ~kDidCreateSockets;
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+#pragma mark Diagnostics
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+- (BOOL)getLocalAddress:(NSData **)dataPtr
+                   host:(NSString **)hostPtr
+                   port:(uint16_t *)portPtr
+              forSocket:(int)socketFD
+             withFamily:(int)socketFamily
+{
+	
+	NSData   *data = nil;
+	NSString *host = nil;
+	uint16_t  port = 0;
+	
+	if (socketFamily == AF_INET)
+	{
+		struct sockaddr_in sockaddr4;
+		socklen_t sockaddr4len = sizeof(sockaddr4);
+		
+		if (getsockname(socketFD, (struct sockaddr *)&sockaddr4, &sockaddr4len) == 0)
+		{
+			data = [NSData dataWithBytes:&sockaddr4 length:sockaddr4len];
+			host = [[self class] hostFromSockaddr4:&sockaddr4];
+			port = [[self class] portFromSockaddr4:&sockaddr4];
+		}
+		else
+		{
+			LogWarn(@"Error in getsockname: %@", [self errnoError]);
+		}
+	}
+	else if (socketFamily == AF_INET6)
+	{
+		struct sockaddr_in6 sockaddr6;
+		socklen_t sockaddr6len = sizeof(sockaddr6);
+		
+		if (getsockname(socketFD, (struct sockaddr *)&sockaddr6, &sockaddr6len) == 0)
+		{
+			data = [NSData dataWithBytes:&sockaddr6 length:sockaddr6len];
+			host = [[self class] hostFromSockaddr6:&sockaddr6];
+			port = [[self class] portFromSockaddr6:&sockaddr6];
+		}
+		else
+		{
+			LogWarn(@"Error in getsockname: %@", [self errnoError]);
+		}
+	}
+	
+	if (dataPtr) *dataPtr = data;
+	if (hostPtr) *hostPtr = host;
+	if (portPtr) *portPtr = port;
+	
+	return (data != nil);
+}
+
+- (void)maybeUpdateCachedLocalAddress4Info
+{
+	NSAssert(dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey), @"Must be dispatched on socketQueue");
+	
+	if ( cachedLocalAddress4 || ((flags & kDidBind) == 0) || (socket4FD == SOCKET_NULL) )
+	{
+		return;
+	}
+	
+	NSData *address = nil;
+	NSString *host = nil;
+	uint16_t port = 0;
+	
+	if ([self getLocalAddress:&address host:&host port:&port forSocket:socket4FD withFamily:AF_INET])
+	{
+		
+		cachedLocalAddress4 = address;
+		cachedLocalHost4 = host;
+		cachedLocalPort4 = port;
+	}
+}
+
+- (void)maybeUpdateCachedLocalAddress6Info
+{
+	NSAssert(dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey), @"Must be dispatched on socketQueue");
+	
+	if ( cachedLocalAddress6 || ((flags & kDidBind) == 0) || (socket6FD == SOCKET_NULL) )
+	{
+		return;
+	}
+	
+	NSData *address = nil;
+	NSString *host = nil;
+	uint16_t port = 0;
+	
+	if ([self getLocalAddress:&address host:&host port:&port forSocket:socket6FD withFamily:AF_INET6])
+	{
+		
+		cachedLocalAddress6 = address;
+		cachedLocalHost6 = host;
+		cachedLocalPort6 = port;
+	}
+}
+
+- (NSData *)localAddress
+{
+	__block NSData *result = nil;
+	
+	dispatch_block_t block = ^{
+		
+        if (self->socket4FD != SOCKET_NULL)
+		{
+			[self maybeUpdateCachedLocalAddress4Info];
+            result = self->cachedLocalAddress4;
+		}
+		else
+		{
+			[self maybeUpdateCachedLocalAddress6Info];
+            result = self->cachedLocalAddress6;
+		}
+		
+	};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_sync(socketQueue, AutoreleasedBlock(block));
+	
+	return result;
+}
+
+- (NSString *)localHost
+{
+	__block NSString *result = nil;
+	
+	dispatch_block_t block = ^{
+		
+        if (self->socket4FD != SOCKET_NULL)
+		{
+			[self maybeUpdateCachedLocalAddress4Info];
+            result = self->cachedLocalHost4;
+		}
+		else
+		{
+			[self maybeUpdateCachedLocalAddress6Info];
+            result = self->cachedLocalHost6;
+		}
+	};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_sync(socketQueue, AutoreleasedBlock(block));
+	
+	return result;
+}
+
+- (uint16_t)localPort
+{
+	__block uint16_t result = 0;
+	
+	dispatch_block_t block = ^{
+		
+        if (self->socket4FD != SOCKET_NULL)
+		{
+			[self maybeUpdateCachedLocalAddress4Info];
+            result = self->cachedLocalPort4;
+		}
+		else
+		{
+			[self maybeUpdateCachedLocalAddress6Info];
+            result = self->cachedLocalPort6;
+		}
+	};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_sync(socketQueue, AutoreleasedBlock(block));
+	
+	return result;
+}
+
+- (NSData *)localAddress_IPv4
+{
+	__block NSData *result = nil;
+	
+	dispatch_block_t block = ^{
+		
+		[self maybeUpdateCachedLocalAddress4Info];
+        result = self->cachedLocalAddress4;
+	};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_sync(socketQueue, AutoreleasedBlock(block));
+	
+	return result;
+}
+
+- (NSString *)localHost_IPv4
+{
+	__block NSString *result = nil;
+	
+	dispatch_block_t block = ^{
+		
+		[self maybeUpdateCachedLocalAddress4Info];
+        result = self->cachedLocalHost4;
+	};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_sync(socketQueue, AutoreleasedBlock(block));
+	
+	return result;
+}
+
+- (uint16_t)localPort_IPv4
+{
+	__block uint16_t result = 0;
+	
+	dispatch_block_t block = ^{
+		
+		[self maybeUpdateCachedLocalAddress4Info];
+        result = self->cachedLocalPort4;
+	};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_sync(socketQueue, AutoreleasedBlock(block));
+	
+	return result;
+}
+
+- (NSData *)localAddress_IPv6
+{
+	__block NSData *result = nil;
+	
+	dispatch_block_t block = ^{
+		
+		[self maybeUpdateCachedLocalAddress6Info];
+        result = self->cachedLocalAddress6;
+	};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_sync(socketQueue, AutoreleasedBlock(block));
+	
+	return result;
+}
+
+- (NSString *)localHost_IPv6
+{
+	__block NSString *result = nil;
+	
+	dispatch_block_t block = ^{
+		
+		[self maybeUpdateCachedLocalAddress6Info];
+        result = self->cachedLocalHost6;
+	};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_sync(socketQueue, AutoreleasedBlock(block));
+	
+	return result;
+}
+
+- (uint16_t)localPort_IPv6
+{
+	__block uint16_t result = 0;
+	
+	dispatch_block_t block = ^{
+		
+		[self maybeUpdateCachedLocalAddress6Info];
+        result = self->cachedLocalPort6;
+	};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_sync(socketQueue, AutoreleasedBlock(block));
+	
+	return result;
+}
+
+- (void)maybeUpdateCachedConnectedAddressInfo
+{
+	NSAssert(dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey), @"Must be dispatched on socketQueue");
+	
+	if (cachedConnectedAddress || (flags & kDidConnect) == 0)
+	{
+		return;
+	}
+	
+	NSData *data = nil;
+	NSString *host = nil;
+	uint16_t port = 0;
+	int family = AF_UNSPEC;
+	
+	if (socket4FD != SOCKET_NULL)
+	{
+		struct sockaddr_in sockaddr4;
+		socklen_t sockaddr4len = sizeof(sockaddr4);
+		
+		if (getpeername(socket4FD, (struct sockaddr *)&sockaddr4, &sockaddr4len) == 0)
+		{
+			data = [NSData dataWithBytes:&sockaddr4 length:sockaddr4len];
+			host = [[self class] hostFromSockaddr4:&sockaddr4];
+			port = [[self class] portFromSockaddr4:&sockaddr4];
+			family = AF_INET;
+		}
+		else
+		{
+			LogWarn(@"Error in getpeername: %@", [self errnoError]);
+		}
+	}
+	else if (socket6FD != SOCKET_NULL)
+	{
+		struct sockaddr_in6 sockaddr6;
+		socklen_t sockaddr6len = sizeof(sockaddr6);
+		
+		if (getpeername(socket6FD, (struct sockaddr *)&sockaddr6, &sockaddr6len) == 0)
+		{
+			data = [NSData dataWithBytes:&sockaddr6 length:sockaddr6len];
+			host = [[self class] hostFromSockaddr6:&sockaddr6];
+			port = [[self class] portFromSockaddr6:&sockaddr6];
+			family = AF_INET6;
+		}
+		else
+		{
+			LogWarn(@"Error in getpeername: %@", [self errnoError]);
+		}
+	}
+	
+	
+	cachedConnectedAddress = data;
+	cachedConnectedHost    = host;
+	cachedConnectedPort    = port;
+	cachedConnectedFamily  = family;
+}
+
+- (NSData *)connectedAddress
+{
+	__block NSData *result = nil;
+	
+	dispatch_block_t block = ^{
+		
+		[self maybeUpdateCachedConnectedAddressInfo];
+        result = self->cachedConnectedAddress;
+	};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_sync(socketQueue, AutoreleasedBlock(block));
+	
+	return result;
+}
+
+- (NSString *)connectedHost
+{
+	__block NSString *result = nil;
+	
+	dispatch_block_t block = ^{
+		
+		[self maybeUpdateCachedConnectedAddressInfo];
+        result = self->cachedConnectedHost;
+	};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_sync(socketQueue, AutoreleasedBlock(block));
+	
+	return result;
+}
+
+- (uint16_t)connectedPort
+{
+	__block uint16_t result = 0;
+	
+	dispatch_block_t block = ^{
+		
+		[self maybeUpdateCachedConnectedAddressInfo];
+        result = self->cachedConnectedPort;
+	};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_sync(socketQueue, AutoreleasedBlock(block));
+	
+	return result;
+}
+
+- (BOOL)isConnected
+{
+	__block BOOL result = NO;
+	
+	dispatch_block_t block = ^{
+        result = (self->flags & kDidConnect) ? YES : NO;
+	};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_sync(socketQueue, block);
+	
+	return result;
+}
+
+- (BOOL)isClosed
+{
+	__block BOOL result = YES;
+	
+	dispatch_block_t block = ^{
+		
+        result = (self->flags & kDidCreateSockets) ? NO : YES;
+	};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_sync(socketQueue, block);
+	
+	return result;
+}
+
+- (BOOL)isIPv4
+{
+	__block BOOL result = NO;
+	
+	dispatch_block_t block = ^{
+		
+        if (self->flags & kDidCreateSockets)
+		{
+            result = (self->socket4FD != SOCKET_NULL);
+		}
+		else
+		{
+			result = [self isIPv4Enabled];
+		}
+	};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_sync(socketQueue, block);
+	
+	return result;
+}
+
+- (BOOL)isIPv6
+{
+	__block BOOL result = NO;
+	
+	dispatch_block_t block = ^{
+		
+        if (self->flags & kDidCreateSockets)
+		{
+            result = (self->socket6FD != SOCKET_NULL);
+		}
+		else
+		{
+			result = [self isIPv6Enabled];
+		}
+	};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_sync(socketQueue, block);
+	
+	return result;
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+#pragma mark Binding
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+/**
+ * This method runs through the various checks required prior to a bind attempt.
+ * It is shared between the various bind methods.
+**/
+- (BOOL)preBind:(NSError **)errPtr
+{
+	if (![self preOp:errPtr])
+	{
+		return NO;
+	}
+	
+	if (flags & kDidBind)
+	{
+		if (errPtr)
+		{
+			NSString *msg = @"Cannot bind a socket more than once.";
+			*errPtr = [self badConfigError:msg];
+		}
+		return NO;
+	}
+	
+	if ((flags & kConnecting) || (flags & kDidConnect))
+	{
+		if (errPtr)
+		{
+			NSString *msg = @"Cannot bind after connecting. If needed, bind first, then connect.";
+			*errPtr = [self badConfigError:msg];
+		}
+		return NO;
+	}
+	
+	BOOL isIPv4Disabled = (config & kIPv4Disabled) ? YES : NO;
+	BOOL isIPv6Disabled = (config & kIPv6Disabled) ? YES : NO;
+	
+	if (isIPv4Disabled && isIPv6Disabled) // Must have IPv4 or IPv6 enabled
+	{
+		if (errPtr)
+		{
+			NSString *msg = @"Both IPv4 and IPv6 have been disabled. Must enable at least one protocol first.";
+			*errPtr = [self badConfigError:msg];
+		}
+		return NO;
+	}
+	
+	return YES;
+}
+
+- (BOOL)bindToPort:(uint16_t)port error:(NSError **)errPtr
+{
+	return [self bindToPort:port interface:nil error:errPtr];
+}
+
+- (BOOL)bindToPort:(uint16_t)port interface:(NSString *)interface error:(NSError **)errPtr
+{
+	__block BOOL result = NO;
+	__block NSError *err = nil;
+	
+	dispatch_block_t block = ^{ @autoreleasepool {
+		
+		// Run through sanity checks
+		
+		if (![self preBind:&err])
+		{
+			return_from_block;
+		}
+		
+		// Check the given interface
+		
+		NSData *interface4 = nil;
+		NSData *interface6 = nil;
+		
+		[self convertIntefaceDescription:interface port:port intoAddress4:&interface4 address6:&interface6];
+		
+		if ((interface4 == nil) && (interface6 == nil))
+		{
+			NSString *msg = @"Unknown interface. Specify valid interface by name (e.g. \"en1\") or IP address.";
+			err = [self badParamError:msg];
+			
+			return_from_block;
+		}
+		
+        BOOL isIPv4Disabled = (self->config & kIPv4Disabled) ? YES : NO;
+        BOOL isIPv6Disabled = (self->config & kIPv6Disabled) ? YES : NO;
+		
+		if (isIPv4Disabled && (interface6 == nil))
+		{
+			NSString *msg = @"IPv4 has been disabled and specified interface doesn't support IPv6.";
+			err = [self badParamError:msg];
+			
+			return_from_block;
+		}
+		
+		if (isIPv6Disabled && (interface4 == nil))
+		{
+			NSString *msg = @"IPv6 has been disabled and specified interface doesn't support IPv4.";
+			err = [self badParamError:msg];
+			
+			return_from_block;
+		}
+		
+		// Determine protocol(s)
+		
+		BOOL useIPv4 = !isIPv4Disabled && (interface4 != nil);
+		BOOL useIPv6 = !isIPv6Disabled && (interface6 != nil);
+		
+		// Create the socket(s) if needed
+		
+        if ((self->flags & kDidCreateSockets) == 0)
+		{
+			if (![self createSocket4:useIPv4 socket6:useIPv6 error:&err])
+			{
+				return_from_block;
+			}
+		}
+		
+		// Bind the socket(s)
+		
+		LogVerbose(@"Binding socket to port(%hu) interface(%@)", port, interface);
+		
+		if (useIPv4)
+		{
+            int status = bind(self->socket4FD, (struct sockaddr *)[interface4 bytes], (socklen_t)[interface4 length]);
+			if (status == -1)
+			{
+				[self closeSockets];
+				
+				NSString *reason = @"Error in bind() function";
+				err = [self errnoErrorWithReason:reason];
+				
+				return_from_block;
+			}
+		}
+		
+		if (useIPv6)
+		{
+            int status = bind(self->socket6FD, (struct sockaddr *)[interface6 bytes], (socklen_t)[interface6 length]);
+			if (status == -1)
+			{
+				[self closeSockets];
+				
+				NSString *reason = @"Error in bind() function";
+				err = [self errnoErrorWithReason:reason];
+				
+				return_from_block;
+			}
+		}
+		
+		// Update flags
+		
+        self->flags |= kDidBind;
+		
+        if (!useIPv4) self->flags |= kIPv4Deactivated;
+        if (!useIPv6) self->flags |= kIPv6Deactivated;
+		
+		result = YES;
+		
+	}};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_sync(socketQueue, block);
+	
+	if (err)
+		LogError(@"Error binding to port/interface: %@", err);
+	
+	if (errPtr)
+		*errPtr = err;
+	
+	return result;
+}
+
+- (BOOL)bindToAddress:(NSData *)localAddr error:(NSError **)errPtr
+{
+	__block BOOL result = NO;
+	__block NSError *err = nil;
+	
+	dispatch_block_t block = ^{ @autoreleasepool {
+		
+		// Run through sanity checks
+		
+		if (![self preBind:&err])
+		{
+			return_from_block;
+		}
+		
+		// Check the given address
+		
+		int addressFamily = [[self class] familyFromAddress:localAddr];
+		
+		if (addressFamily == AF_UNSPEC)
+		{
+			NSString *msg = @"A valid IPv4 or IPv6 address was not given";
+			err = [self badParamError:msg];
+			
+			return_from_block;
+		}
+		
+		NSData *localAddr4 = (addressFamily == AF_INET)  ? localAddr : nil;
+		NSData *localAddr6 = (addressFamily == AF_INET6) ? localAddr : nil;
+		
+        BOOL isIPv4Disabled = (self->config & kIPv4Disabled) ? YES : NO;
+        BOOL isIPv6Disabled = (self->config & kIPv6Disabled) ? YES : NO;
+		
+		if (isIPv4Disabled && localAddr4)
+		{
+			NSString *msg = @"IPv4 has been disabled and an IPv4 address was passed.";
+			err = [self badParamError:msg];
+			
+			return_from_block;
+		}
+		
+		if (isIPv6Disabled && localAddr6)
+		{
+			NSString *msg = @"IPv6 has been disabled and an IPv6 address was passed.";
+			err = [self badParamError:msg];
+			
+			return_from_block;
+		}
+		
+		// Determine protocol(s)
+		
+		BOOL useIPv4 = !isIPv4Disabled && (localAddr4 != nil);
+		BOOL useIPv6 = !isIPv6Disabled && (localAddr6 != nil);
+		
+		// Create the socket(s) if needed
+		
+        if ((self->flags & kDidCreateSockets) == 0)
+		{
+			if (![self createSocket4:useIPv4 socket6:useIPv6 error:&err])
+			{
+				return_from_block;
+			}
+		}
+		
+		// Bind the socket(s)
+		
+		if (useIPv4)
+		{
+			LogVerbose(@"Binding socket to address(%@:%hu)",
+					   [[self class] hostFromAddress:localAddr4],
+					   [[self class] portFromAddress:localAddr4]);
+			
+            int status = bind(self->socket4FD, (struct sockaddr *)[localAddr4 bytes], (socklen_t)[localAddr4 length]);
+			if (status == -1)
+			{
+				[self closeSockets];
+				
+				NSString *reason = @"Error in bind() function";
+				err = [self errnoErrorWithReason:reason];
+				
+				return_from_block;
+			}
+		}
+		else
+		{
+			LogVerbose(@"Binding socket to address(%@:%hu)",
+					   [[self class] hostFromAddress:localAddr6],
+					   [[self class] portFromAddress:localAddr6]);
+			
+            int status = bind(self->socket6FD, (struct sockaddr *)[localAddr6 bytes], (socklen_t)[localAddr6 length]);
+			if (status == -1)
+			{
+				[self closeSockets];
+				
+				NSString *reason = @"Error in bind() function";
+				err = [self errnoErrorWithReason:reason];
+				
+				return_from_block;
+			}
+		}
+		
+		// Update flags
+		
+        self->flags |= kDidBind;
+		
+        if (!useIPv4) self->flags |= kIPv4Deactivated;
+        if (!useIPv6) self->flags |= kIPv6Deactivated;
+		
+		result = YES;
+		
+	}};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_sync(socketQueue, block);
+	
+	if (err)
+		LogError(@"Error binding to address: %@", err);
+	
+	if (errPtr)
+		*errPtr = err;
+	
+	return result;
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+#pragma mark Connecting
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+/**
+ * This method runs through the various checks required prior to a connect attempt.
+ * It is shared between the various connect methods.
+**/
+- (BOOL)preConnect:(NSError **)errPtr
+{
+	if (![self preOp:errPtr])
+	{
+		return NO;
+	}
+	
+	if ((flags & kConnecting) || (flags & kDidConnect))
+	{
+		if (errPtr)
+		{
+			NSString *msg = @"Cannot connect a socket more than once.";
+			*errPtr = [self badConfigError:msg];
+		}
+		return NO;
+	}
+	
+	BOOL isIPv4Disabled = (config & kIPv4Disabled) ? YES : NO;
+	BOOL isIPv6Disabled = (config & kIPv6Disabled) ? YES : NO;
+	
+	if (isIPv4Disabled && isIPv6Disabled) // Must have IPv4 or IPv6 enabled
+	{
+		if (errPtr)
+		{
+			NSString *msg = @"Both IPv4 and IPv6 have been disabled. Must enable at least one protocol first.";
+			*errPtr = [self badConfigError:msg];
+		}
+		return NO;
+	}
+	
+	return YES;
+}
+
+- (BOOL)connectToHost:(NSString *)host onPort:(uint16_t)port error:(NSError **)errPtr
+{
+	__block BOOL result = NO;
+	__block NSError *err = nil;
+	
+	dispatch_block_t block = ^{ @autoreleasepool {
+		
+		// Run through sanity checks.
+		
+		if (![self preConnect:&err])
+		{
+			return_from_block;
+		}
+		
+		// Check parameter(s)
+		
+		if (host == nil)
+		{
+			NSString *msg = @"The host param is nil. Should be domain name or IP address string.";
+			err = [self badParamError:msg];
+			
+			return_from_block;
+		}
+		
+		// Create the socket(s) if needed
+		
+        if ((self->flags & kDidCreateSockets) == 0)
+		{
+			if (![self createSockets:&err])
+			{
+				return_from_block;
+			}
+		}
+		
+		// Create special connect packet
+		
+		GCDAsyncUdpSpecialPacket *packet = [[GCDAsyncUdpSpecialPacket alloc] init];
+		packet->resolveInProgress = YES;
+		
+		// Start asynchronous DNS resolve for host:port on background queue
+		
+		LogVerbose(@"Dispatching DNS resolve for connect...");
+		
+		[self asyncResolveHost:host port:port withCompletionBlock:^(NSArray *addresses, NSError *error) {
+			
+			// The asyncResolveHost:port:: method asynchronously dispatches a task onto the global concurrent queue,
+			// and immediately returns. Once the async resolve task completes,
+			// this block is executed on our socketQueue.
+			
+			packet->resolveInProgress = NO;
+			
+			packet->addresses = addresses;
+			packet->error = error;
+			
+			[self maybeConnect];
+		}];
+		
+		// Updates flags, add connect packet to send queue, and pump send queue
+		
+        self->flags |= kConnecting;
+		
+        [self->sendQueue addObject:packet];
+		[self maybeDequeueSend];
+		
+		result = YES;
+	}};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_sync(socketQueue, block);
+	
+	if (err)
+		LogError(@"Error connecting to host/port: %@", err);
+	
+	if (errPtr)
+		*errPtr = err;
+	
+	return result;
+}
+
+- (BOOL)connectToAddress:(NSData *)remoteAddr error:(NSError **)errPtr
+{
+	__block BOOL result = NO;
+	__block NSError *err = nil;
+	
+	dispatch_block_t block = ^{ @autoreleasepool {
+		
+		// Run through sanity checks.
+		
+		if (![self preConnect:&err])
+		{
+			return_from_block;
+		}
+		
+		// Check parameter(s)
+		
+		if (remoteAddr == nil)
+		{
+			NSString *msg = @"The address param is nil. Should be a valid address.";
+			err = [self badParamError:msg];
+			
+			return_from_block;
+		}
+		
+		// Create the socket(s) if needed
+		
+        if ((self->flags & kDidCreateSockets) == 0)
+		{
+			if (![self createSockets:&err])
+			{
+				return_from_block;
+			}
+		}
+		
+		// The remoteAddr parameter could be of type NSMutableData.
+		// So we copy it to be safe.
+		
+		NSData *address = [remoteAddr copy];
+		NSArray *addresses = [NSArray arrayWithObject:address];
+		
+		GCDAsyncUdpSpecialPacket *packet = [[GCDAsyncUdpSpecialPacket alloc] init];
+		packet->addresses = addresses;
+		
+		// Updates flags, add connect packet to send queue, and pump send queue
+		
+        self->flags |= kConnecting;
+		
+        [self->sendQueue addObject:packet];
+		[self maybeDequeueSend];
+		
+		result = YES;
+	}};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_sync(socketQueue, block);
+	
+	if (err)
+		LogError(@"Error connecting to address: %@", err);
+	
+	if (errPtr)
+		*errPtr = err;
+	
+	return result;
+}
+
+- (void)maybeConnect
+{
+	LogTrace();
+	NSAssert(dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey), @"Must be dispatched on socketQueue");
+	
+	
+	BOOL sendQueueReady = [currentSend isKindOfClass:[GCDAsyncUdpSpecialPacket class]];
+	
+	if (sendQueueReady)
+	{
+		GCDAsyncUdpSpecialPacket *connectPacket = (GCDAsyncUdpSpecialPacket *)currentSend;
+		
+		if (connectPacket->resolveInProgress)
+		{
+			LogVerbose(@"Waiting for DNS resolve...");
+		}
+		else
+		{
+			if (connectPacket->error)
+			{
+				[self notifyDidNotConnect:connectPacket->error];
+			}
+			else
+			{
+				NSData *address = nil;
+				NSError *error = nil;
+				
+				int addressFamily = [self getAddress:&address error:&error fromAddresses:connectPacket->addresses];
+				
+				// Perform connect
+				
+				BOOL result = NO;
+				
+				switch (addressFamily)
+				{
+					case AF_INET  : result = [self connectWithAddress4:address error:&error]; break;
+					case AF_INET6 : result = [self connectWithAddress6:address error:&error]; break;
+				}
+				
+				if (result)
+				{
+					flags |= kDidBind;
+					flags |= kDidConnect;
+					
+					cachedConnectedAddress = address;
+					cachedConnectedHost = [[self class] hostFromAddress:address];
+					cachedConnectedPort = [[self class] portFromAddress:address];
+					cachedConnectedFamily = addressFamily;
+					
+					[self notifyDidConnectToAddress:address];
+				}
+				else
+				{
+					[self notifyDidNotConnect:error];
+				}
+			}
+			
+			flags &= ~kConnecting;
+			
+			[self endCurrentSend];
+			[self maybeDequeueSend];
+		}
+	}
+}
+
+- (BOOL)connectWithAddress4:(NSData *)address4 error:(NSError **)errPtr
+{
+	LogTrace();
+	NSAssert(dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey), @"Must be dispatched on socketQueue");
+	
+	int status = connect(socket4FD, (struct sockaddr *)[address4 bytes], (socklen_t)[address4 length]);
+	if (status != 0)
+	{
+		if (errPtr)
+			*errPtr = [self errnoErrorWithReason:@"Error in connect() function"];
+		
+		return NO;
+	}
+	
+	[self closeSocket6];
+	flags |= kIPv6Deactivated;
+	
+	return YES;
+}
+
+- (BOOL)connectWithAddress6:(NSData *)address6 error:(NSError **)errPtr
+{
+	LogTrace();
+	NSAssert(dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey), @"Must be dispatched on socketQueue");
+	
+	int status = connect(socket6FD, (struct sockaddr *)[address6 bytes], (socklen_t)[address6 length]);
+	if (status != 0)
+	{
+		if (errPtr)
+			*errPtr = [self errnoErrorWithReason:@"Error in connect() function"];
+		
+		return NO;
+	}
+	
+	[self closeSocket4];
+	flags |= kIPv4Deactivated;
+	
+	return YES;
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+#pragma mark Multicast
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+- (BOOL)preJoin:(NSError **)errPtr
+{
+	if (![self preOp:errPtr])
+	{
+		return NO;
+	}
+	
+	if (!(flags & kDidBind))
+	{
+		if (errPtr)
+		{
+			NSString *msg = @"Must bind a socket before joining a multicast group.";
+			*errPtr = [self badConfigError:msg];
+		}
+		return NO;
+	}
+	
+	if ((flags & kConnecting) || (flags & kDidConnect))
+	{
+		if (errPtr)
+		{
+			NSString *msg = @"Cannot join a multicast group if connected.";
+			*errPtr = [self badConfigError:msg];
+		}
+		return NO;
+	}
+	
+	return YES;
+}
+
+- (BOOL)joinMulticastGroup:(NSString *)group error:(NSError **)errPtr
+{
+	return [self joinMulticastGroup:group onInterface:nil error:errPtr];
+}
+
+- (BOOL)joinMulticastGroup:(NSString *)group onInterface:(NSString *)interface error:(NSError **)errPtr
+{
+    // IP_ADD_MEMBERSHIP == IPV6_JOIN_GROUP
+    return [self performMulticastRequest:IP_ADD_MEMBERSHIP forGroup:group onInterface:interface error:errPtr];
+}
+
+- (BOOL)leaveMulticastGroup:(NSString *)group error:(NSError **)errPtr
+{
+	return [self leaveMulticastGroup:group onInterface:nil error:errPtr];
+}
+
+- (BOOL)leaveMulticastGroup:(NSString *)group onInterface:(NSString *)interface error:(NSError **)errPtr
+{
+    // IP_DROP_MEMBERSHIP == IPV6_LEAVE_GROUP
+    return [self performMulticastRequest:IP_DROP_MEMBERSHIP forGroup:group onInterface:interface error:errPtr];
+}
+
+- (BOOL)performMulticastRequest:(int)requestType
+                       forGroup:(NSString *)group
+                    onInterface:(NSString *)interface
+                          error:(NSError **)errPtr
+{
+	__block BOOL result = NO;
+	__block NSError *err = nil;
+	
+	dispatch_block_t block = ^{ @autoreleasepool {
+		
+		// Run through sanity checks
+		
+		if (![self preJoin:&err])
+		{
+			return_from_block;
+		}
+		
+		// Convert group to address
+		
+		NSData *groupAddr4 = nil;
+		NSData *groupAddr6 = nil;
+		
+		[self convertNumericHost:group port:0 intoAddress4:&groupAddr4 address6:&groupAddr6];
+		
+		if ((groupAddr4 == nil) && (groupAddr6 == nil))
+		{
+			NSString *msg = @"Unknown group. Specify valid group IP address.";
+			err = [self badParamError:msg];
+			
+			return_from_block;
+		}
+		
+		// Convert interface to address
+		
+		NSData *interfaceAddr4 = nil;
+		NSData *interfaceAddr6 = nil;
+		
+		[self convertIntefaceDescription:interface port:0 intoAddress4:&interfaceAddr4 address6:&interfaceAddr6];
+		
+		if ((interfaceAddr4 == nil) && (interfaceAddr6 == nil))
+		{
+			NSString *msg = @"Unknown interface. Specify valid interface by name (e.g. \"en1\") or IP address.";
+			err = [self badParamError:msg];
+			
+			return_from_block;
+		}
+		
+		// Perform join
+		
+        if ((self->socket4FD != SOCKET_NULL) && groupAddr4 && interfaceAddr4)
+		{
+			const struct sockaddr_in *nativeGroup = (struct sockaddr_in *)[groupAddr4 bytes];
+			const struct sockaddr_in *nativeIface = (struct sockaddr_in *)[interfaceAddr4 bytes];
+			
+			struct ip_mreq imreq;
+			imreq.imr_multiaddr = nativeGroup->sin_addr;
+			imreq.imr_interface = nativeIface->sin_addr;
+			
+            int status = setsockopt(self->socket4FD, IPPROTO_IP, requestType, (const void *)&imreq, sizeof(imreq));
+			if (status != 0)
+			{
+				err = [self errnoErrorWithReason:@"Error in setsockopt() function"];
+				
+				return_from_block;
+			}
+			
+			// Using IPv4 only
+			[self closeSocket6];
+			
+			result = YES;
+		}
+        else if ((self->socket6FD != SOCKET_NULL) && groupAddr6 && interfaceAddr6)
+		{
+			const struct sockaddr_in6 *nativeGroup = (struct sockaddr_in6 *)[groupAddr6 bytes];
+			
+			struct ipv6_mreq imreq;
+			imreq.ipv6mr_multiaddr = nativeGroup->sin6_addr;
+			imreq.ipv6mr_interface = [self indexOfInterfaceAddr6:interfaceAddr6];
+			
+            int status = setsockopt(self->socket6FD, IPPROTO_IPV6, requestType, (const void *)&imreq, sizeof(imreq));
+			if (status != 0)
+			{
+				err = [self errnoErrorWithReason:@"Error in setsockopt() function"];
+				
+				return_from_block;
+			}
+			
+			// Using IPv6 only
+			[self closeSocket4];
+			
+			result = YES;
+		}
+		else
+		{
+			NSString *msg = @"Socket, group, and interface do not have matching IP versions";
+			err = [self badParamError:msg];
+			
+			return_from_block;
+		}
+		
+	}};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_sync(socketQueue, block);
+	
+	if (errPtr)
+		*errPtr = err;
+	
+	return result;
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+#pragma mark Reuse port
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+- (BOOL)enableReusePort:(BOOL)flag error:(NSError **)errPtr
+{
+	__block BOOL result = NO;
+	__block NSError *err = nil;
+	
+	dispatch_block_t block = ^{ @autoreleasepool {
+		
+		if (![self preOp:&err])
+		{
+			return_from_block;
+		}
+		
+        if ((self->flags & kDidCreateSockets) == 0)
+		{
+			if (![self createSockets:&err])
+			{
+				return_from_block;
+			}
+		}
+		
+		int value = flag ? 1 : 0;
+        if (self->socket4FD != SOCKET_NULL)
+		{
+            int error = setsockopt(self->socket4FD, SOL_SOCKET, SO_REUSEPORT, (const void *)&value, sizeof(value));
+			
+			if (error)
+			{
+				err = [self errnoErrorWithReason:@"Error in setsockopt() function"];
+				
+				return_from_block;
+			}
+			result = YES;
+		}
+		
+        if (self->socket6FD != SOCKET_NULL)
+		{
+            int error = setsockopt(self->socket6FD, SOL_SOCKET, SO_REUSEPORT, (const void *)&value, sizeof(value));
+			
+			if (error)
+			{
+				err = [self errnoErrorWithReason:@"Error in setsockopt() function"];
+				
+				return_from_block;
+			}
+			result = YES;
+		}
+		
+	}};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_sync(socketQueue, block);
+	
+	if (errPtr)
+		*errPtr = err;
+	
+	return result;
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+#pragma mark Broadcast
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+- (BOOL)enableBroadcast:(BOOL)flag error:(NSError **)errPtr
+{
+	__block BOOL result = NO;
+	__block NSError *err = nil;
+	
+	dispatch_block_t block = ^{ @autoreleasepool {
+		
+		if (![self preOp:&err])
+		{
+			return_from_block;
+		}
+		
+        if ((self->flags & kDidCreateSockets) == 0)
+		{
+			if (![self createSockets:&err])
+			{
+				return_from_block;
+			}
+		}
+		
+        if (self->socket4FD != SOCKET_NULL)
+		{
+			int value = flag ? 1 : 0;
+            int error = setsockopt(self->socket4FD, SOL_SOCKET, SO_BROADCAST, (const void *)&value, sizeof(value));
+			
+			if (error)
+			{
+				err = [self errnoErrorWithReason:@"Error in setsockopt() function"];
+				
+				return_from_block;
+			}
+			result = YES;
+		}
+		
+		// IPv6 does not implement broadcast, the ability to send a packet to all hosts on the attached link.
+		// The same effect can be achieved by sending a packet to the link-local all hosts multicast group.
+		
+	}};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_sync(socketQueue, block);
+	
+	if (errPtr)
+		*errPtr = err;
+	
+	return result;
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+#pragma mark Sending
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+- (void)sendData:(NSData *)data withTag:(long)tag
+{
+	[self sendData:data withTimeout:-1.0 tag:tag];
+}
+
+- (void)sendData:(NSData *)data withTimeout:(NSTimeInterval)timeout tag:(long)tag
+{
+	LogTrace();
+	
+	if ([data length] == 0)
+	{
+		LogWarn(@"Ignoring attempt to send nil/empty data.");
+		return;
+	}
+    
+    
+	
+	GCDAsyncUdpSendPacket *packet = [[GCDAsyncUdpSendPacket alloc] initWithData:data timeout:timeout tag:tag];
+	
+	dispatch_async(socketQueue, ^{ @autoreleasepool {
+		
+        [self->sendQueue addObject:packet];
+		[self maybeDequeueSend];
+	}});
+	
+}
+
+- (void)sendData:(NSData *)data
+          toHost:(NSString *)host
+            port:(uint16_t)port
+     withTimeout:(NSTimeInterval)timeout
+             tag:(long)tag
+{
+	LogTrace();
+	
+	if ([data length] == 0)
+	{
+		LogWarn(@"Ignoring attempt to send nil/empty data.");
+		return;
+	}
+	
+	GCDAsyncUdpSendPacket *packet = [[GCDAsyncUdpSendPacket alloc] initWithData:data timeout:timeout tag:tag];
+	packet->resolveInProgress = YES;
+	
+	[self asyncResolveHost:host port:port withCompletionBlock:^(NSArray *addresses, NSError *error) {
+		
+		// The asyncResolveHost:port:: method asynchronously dispatches a task onto the global concurrent queue,
+		// and immediately returns. Once the async resolve task completes,
+		// this block is executed on our socketQueue.
+		
+		packet->resolveInProgress = NO;
+		
+		packet->resolvedAddresses = addresses;
+		packet->resolveError = error;
+		
+        if (packet == self->currentSend)
+		{
+			LogVerbose(@"currentSend - address resolved");
+			[self doPreSend];
+		}
+	}];
+	
+	dispatch_async(socketQueue, ^{ @autoreleasepool {
+		
+        [self->sendQueue addObject:packet];
+		[self maybeDequeueSend];
+		
+	}});
+	
+}
+
+- (void)sendData:(NSData *)data toAddress:(NSData *)remoteAddr withTimeout:(NSTimeInterval)timeout tag:(long)tag
+{
+	LogTrace();
+	
+	if ([data length] == 0)
+	{
+		LogWarn(@"Ignoring attempt to send nil/empty data.");
+		return;
+	}
+	
+	GCDAsyncUdpSendPacket *packet = [[GCDAsyncUdpSendPacket alloc] initWithData:data timeout:timeout tag:tag];
+	packet->addressFamily = [GCDAsyncUdpSocket familyFromAddress:remoteAddr];
+	packet->address = remoteAddr;
+	
+	dispatch_async(socketQueue, ^{ @autoreleasepool {
+		
+        [self->sendQueue addObject:packet];
+		[self maybeDequeueSend];
+	}});
+}
+
+- (void)setSendFilter:(GCDAsyncUdpSocketSendFilterBlock)filterBlock withQueue:(dispatch_queue_t)filterQueue
+{
+	[self setSendFilter:filterBlock withQueue:filterQueue isAsynchronous:YES];
+}
+
+- (void)setSendFilter:(GCDAsyncUdpSocketSendFilterBlock)filterBlock
+            withQueue:(dispatch_queue_t)filterQueue
+       isAsynchronous:(BOOL)isAsynchronous
+{
+	GCDAsyncUdpSocketSendFilterBlock newFilterBlock = NULL;
+	dispatch_queue_t newFilterQueue = NULL;
+	
+	if (filterBlock)
+	{
+		NSAssert(filterQueue, @"Must provide a dispatch_queue in which to run the filter block.");
+		
+		newFilterBlock = [filterBlock copy];
+		newFilterQueue = filterQueue;
+		#if !OS_OBJECT_USE_OBJC
+		dispatch_retain(newFilterQueue);
+		#endif
+	}
+	
+	dispatch_block_t block = ^{
+		
+		#if !OS_OBJECT_USE_OBJC
+        if (self->sendFilterQueue) dispatch_release(self->sendFilterQueue);
+		#endif
+		
+        self->sendFilterBlock = newFilterBlock;
+        self->sendFilterQueue = newFilterQueue;
+        self->sendFilterAsync = isAsynchronous;
+	};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_async(socketQueue, block);
+}
+
+- (void)maybeDequeueSend
+{
+	LogTrace();
+	NSAssert(dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey), @"Must be dispatched on socketQueue");
+	
+	// If we don't have a send operation already in progress
+	if (currentSend == nil)
+	{
+		// Create the sockets if needed
+		if ((flags & kDidCreateSockets) == 0)
+		{
+			NSError *err = nil;
+			if (![self createSockets:&err])
+			{
+				[self closeWithError:err];
+				return;
+			}
+		}
+		
+		while ([sendQueue count] > 0)
+		{
+			// Dequeue the next object in the queue
+			currentSend = [sendQueue objectAtIndex:0];
+			[sendQueue removeObjectAtIndex:0];
+			
+			if ([currentSend isKindOfClass:[GCDAsyncUdpSpecialPacket class]])
+			{
+				[self maybeConnect];
+				
+				return; // The maybeConnect method, if it connects, will invoke this method again
+			}
+			else if (currentSend->resolveError)
+			{
+				// Notify delegate
+				[self notifyDidNotSendDataWithTag:currentSend->tag dueToError:currentSend->resolveError];
+				
+				// Clear currentSend
+				currentSend = nil;
+				
+				continue;
+			}
+			else
+			{
+				// Start preprocessing checks on the send packet
+				[self doPreSend];
+				
+				break;
+			}
+		}
+		
+		if ((currentSend == nil) && (flags & kCloseAfterSends))
+		{
+			[self closeWithError:nil];
+		}
+	}
+}
+
+/**
+ * This method is called after a sendPacket has been dequeued.
+ * It performs various preprocessing checks on the packet,
+ * and queries the sendFilter (if set) to determine if the packet can be sent.
+ * 
+ * If the packet passes all checks, it will be passed on to the doSend method.
+**/
+- (void)doPreSend
+{
+	LogTrace();
+	
+	// 
+	// 1. Check for problems with send packet
+	// 
+	
+	BOOL waitingForResolve = NO;
+	NSError *error = nil;
+	
+	if (flags & kDidConnect)
+	{
+		// Connected socket
+		
+		if (currentSend->resolveInProgress || currentSend->resolvedAddresses || currentSend->resolveError)
+		{
+			NSString *msg = @"Cannot specify destination of packet for connected socket";
+			error = [self badConfigError:msg];
+		}
+		else
+		{
+			currentSend->address = cachedConnectedAddress;
+			currentSend->addressFamily = cachedConnectedFamily;
+		}
+	}
+	else
+	{
+		// Non-Connected socket
+		
+		if (currentSend->resolveInProgress)
+		{
+			// We're waiting for the packet's destination to be resolved.
+			waitingForResolve = YES;
+		}
+		else if (currentSend->resolveError)
+		{
+			error = currentSend->resolveError;
+		}
+		else if (currentSend->address == nil)
+		{
+			if (currentSend->resolvedAddresses == nil)
+			{
+				NSString *msg = @"You must specify destination of packet for a non-connected socket";
+				error = [self badConfigError:msg];
+			}
+			else
+			{
+				// Pick the proper address to use (out of possibly several resolved addresses)
+				
+				NSData *address = nil;
+				int addressFamily = AF_UNSPEC;
+				
+				addressFamily = [self getAddress:&address error:&error fromAddresses:currentSend->resolvedAddresses];
+				
+				currentSend->address = address;
+				currentSend->addressFamily = addressFamily;
+			}
+		}
+	}
+	
+	if (waitingForResolve)
+	{
+		// We're waiting for the packet's destination to be resolved.
+		
+		LogVerbose(@"currentSend - waiting for address resolve");
+		
+		if (flags & kSock4CanAcceptBytes) {
+			[self suspendSend4Source];
+		}
+		if (flags & kSock6CanAcceptBytes) {
+			[self suspendSend6Source];
+		}
+		
+		return;
+	}
+	
+	if (error)
+	{
+		// Unable to send packet due to some error.
+		// Notify delegate and move on.
+		
+		[self notifyDidNotSendDataWithTag:currentSend->tag dueToError:error];
+		[self endCurrentSend];
+		[self maybeDequeueSend];
+		
+		return;
+	}
+	
+	// 
+	// 2. Query sendFilter (if applicable)
+	// 
+	
+	if (sendFilterBlock && sendFilterQueue)
+	{
+		// Query sendFilter
+		
+		if (sendFilterAsync)
+		{
+			// Scenario 1 of 3 - Need to asynchronously query sendFilter
+			
+			currentSend->filterInProgress = YES;
+			GCDAsyncUdpSendPacket *sendPacket = currentSend;
+			
+			dispatch_async(sendFilterQueue, ^{ @autoreleasepool {
+				
+                BOOL allowed = self->sendFilterBlock(sendPacket->buffer, sendPacket->address, sendPacket->tag);
+				
+                dispatch_async(self->socketQueue, ^{ @autoreleasepool {
+					
+					sendPacket->filterInProgress = NO;
+                    if (sendPacket == self->currentSend)
+					{
+						if (allowed)
+						{
+							[self doSend];
+						}
+						else
+						{
+							LogVerbose(@"currentSend - silently dropped by sendFilter");
+							
+                            [self notifyDidSendDataWithTag:self->currentSend->tag];
+							[self endCurrentSend];
+							[self maybeDequeueSend];
+						}
+					}
+				}});
+			}});
+		}
+		else
+		{
+			// Scenario 2 of 3 - Need to synchronously query sendFilter
+			
+			__block BOOL allowed = YES;
+			
+			dispatch_sync(sendFilterQueue, ^{ @autoreleasepool {
+				
+                allowed = self->sendFilterBlock(self->currentSend->buffer, self->currentSend->address, self->currentSend->tag);
+			}});
+			
+			if (allowed)
+			{
+				[self doSend];
+			}
+			else
+			{
+				LogVerbose(@"currentSend - silently dropped by sendFilter");
+				
+				[self notifyDidSendDataWithTag:currentSend->tag];
+				[self endCurrentSend];
+				[self maybeDequeueSend];
+			}
+		}
+	}
+	else // if (!sendFilterBlock || !sendFilterQueue)
+	{
+		// Scenario 3 of 3 - No sendFilter. Just go straight into sending.
+		
+		[self doSend];
+	}
+}
+
+/**
+ * This method performs the actual sending of data in the currentSend packet.
+ * It should only be called if the 
+**/
+- (void)doSend
+{
+	LogTrace();
+	
+	NSAssert(currentSend != nil, @"Invalid logic");
+	
+	// Perform the actual send
+	
+	ssize_t result = 0;
+	
+	if (flags & kDidConnect)
+	{
+		// Connected socket
+		
+		const void *buffer = [currentSend->buffer bytes];
+		size_t length = (size_t)[currentSend->buffer length];
+		
+		if (currentSend->addressFamily == AF_INET)
+		{
+			result = send(socket4FD, buffer, length, 0);
+			LogVerbose(@"send(socket4FD) = %d", result);
+		}
+		else
+		{
+			result = send(socket6FD, buffer, length, 0);
+			LogVerbose(@"send(socket6FD) = %d", result);
+		}
+	}
+	else
+	{
+		// Non-Connected socket
+		
+		const void *buffer = [currentSend->buffer bytes];
+		size_t length = (size_t)[currentSend->buffer length];
+		
+		const void *dst  = [currentSend->address bytes];
+		socklen_t dstSize = (socklen_t)[currentSend->address length];
+		
+		if (currentSend->addressFamily == AF_INET)
+		{
+			result = sendto(socket4FD, buffer, length, 0, dst, dstSize);
+			LogVerbose(@"sendto(socket4FD) = %d", result);
+		}
+		else
+		{
+			result = sendto(socket6FD, buffer, length, 0, dst, dstSize);
+			LogVerbose(@"sendto(socket6FD) = %d", result);
+		}
+	}
+	
+	// If the socket wasn't bound before, it is now
+	
+	if ((flags & kDidBind) == 0)
+	{
+		flags |= kDidBind;
+	}
+	
+	// Check the results.
+	// 
+	// From the send() & sendto() manpage:
+	// 
+	// Upon successful completion, the number of bytes which were sent is returned.
+	// Otherwise, -1 is returned and the global variable errno is set to indicate the error.
+	
+	BOOL waitingForSocket = NO;
+	NSError *socketError = nil;
+	
+	if (result == 0)
+	{
+		waitingForSocket = YES;
+	}
+	else if (result < 0)
+	{
+		if (errno == EAGAIN)
+			waitingForSocket = YES;
+		else
+			socketError = [self errnoErrorWithReason:@"Error in send() function."];
+	}
+	
+	if (waitingForSocket)
+	{
+		// Not enough room in the underlying OS socket send buffer.
+		// Wait for a notification of available space.
+		
+		LogVerbose(@"currentSend - waiting for socket");
+		
+		if (!(flags & kSock4CanAcceptBytes)) {
+			[self resumeSend4Source];
+		}
+		if (!(flags & kSock6CanAcceptBytes)) {
+			[self resumeSend6Source];
+		}
+		
+		if ((sendTimer == NULL) && (currentSend->timeout >= 0.0))
+		{
+			// Unable to send packet right away.
+			// Start timer to timeout the send operation.
+			
+			[self setupSendTimerWithTimeout:currentSend->timeout];
+		}
+	}
+	else if (socketError)
+	{
+		[self closeWithError:socketError];
+	}
+	else // done
+	{
+		[self notifyDidSendDataWithTag:currentSend->tag];
+		[self endCurrentSend];
+		[self maybeDequeueSend];
+	}
+}
+
+/**
+ * Releases all resources associated with the currentSend.
+**/
+- (void)endCurrentSend
+{
+	if (sendTimer)
+	{
+		dispatch_source_cancel(sendTimer);
+		#if !OS_OBJECT_USE_OBJC
+		dispatch_release(sendTimer);
+		#endif
+		sendTimer = NULL;
+	}
+	
+	currentSend = nil;
+}
+
+/**
+ * Performs the operations to timeout the current send operation, and move on.
+**/
+- (void)doSendTimeout
+{
+	LogTrace();
+	
+	[self notifyDidNotSendDataWithTag:currentSend->tag dueToError:[self sendTimeoutError]];
+	[self endCurrentSend];
+	[self maybeDequeueSend];
+}
+
+/**
+ * Sets up a timer that fires to timeout the current send operation.
+ * This method should only be called once per send packet.
+**/
+- (void)setupSendTimerWithTimeout:(NSTimeInterval)timeout
+{
+	NSAssert(sendTimer == NULL, @"Invalid logic");
+	NSAssert(timeout >= 0.0, @"Invalid logic");
+	
+	LogTrace();
+	
+	sendTimer = dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER, 0, 0, socketQueue);
+	
+	dispatch_source_set_event_handler(sendTimer, ^{ @autoreleasepool {
+		
+		[self doSendTimeout];
+	}});
+	
+	dispatch_time_t tt = dispatch_time(DISPATCH_TIME_NOW, (int64_t)(timeout * NSEC_PER_SEC));
+	
+	dispatch_source_set_timer(sendTimer, tt, DISPATCH_TIME_FOREVER, 0);
+	dispatch_resume(sendTimer);
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+#pragma mark Receiving
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+- (BOOL)receiveOnce:(NSError **)errPtr
+{
+	LogTrace();
+	
+	__block BOOL result = NO;
+	__block NSError *err = nil;
+	
+	dispatch_block_t block = ^{
+		
+        if ((self->flags & kReceiveOnce) == 0)
+		{
+            if ((self->flags & kDidCreateSockets) == 0)
+			{
+				NSString *msg = @"Must bind socket before you can receive data. "
+				@"You can do this explicitly via bind, or implicitly via connect or by sending data.";
+				
+				err = [self badConfigError:msg];
+				return_from_block;
+			}
+			
+            self->flags |=  kReceiveOnce;       // Enable
+            self->flags &= ~kReceiveContinuous; // Disable
+			
+            dispatch_async(self->socketQueue, ^{ @autoreleasepool {
+				
+				[self doReceive];
+			}});
+		}
+		
+		result = YES;
+	};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_sync(socketQueue, block);
+	
+	if (err)
+		LogError(@"Error in beginReceiving: %@", err);
+	
+	if (errPtr)
+		*errPtr = err;
+	
+	return result;
+}
+
+- (BOOL)beginReceiving:(NSError **)errPtr
+{
+	LogTrace();
+	
+	__block BOOL result = NO;
+	__block NSError *err = nil;
+	
+	dispatch_block_t block = ^{
+		
+        if ((self->flags & kReceiveContinuous) == 0)
+		{
+            if ((self->flags & kDidCreateSockets) == 0)
+			{
+				NSString *msg = @"Must bind socket before you can receive data. "
+								@"You can do this explicitly via bind, or implicitly via connect or by sending data.";
+				
+				err = [self badConfigError:msg];
+				return_from_block;
+			}
+			
+            self->flags |= kReceiveContinuous; // Enable
+            self->flags &= ~kReceiveOnce;      // Disable
+			
+            dispatch_async(self->socketQueue, ^{ @autoreleasepool {
+				
+				[self doReceive];
+			}});
+		}
+		
+		result = YES;
+	};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_sync(socketQueue, block);
+	
+	if (err)
+		LogError(@"Error in beginReceiving: %@", err);
+	
+	if (errPtr)
+		*errPtr = err;
+	
+	return result;
+}
+
+- (void)pauseReceiving
+{
+	LogTrace();
+	
+	dispatch_block_t block = ^{
+		
+        self->flags &= ~kReceiveOnce;       // Disable
+        self->flags &= ~kReceiveContinuous; // Disable
+		
+        if (self->socket4FDBytesAvailable > 0) {
+			[self suspendReceive4Source];
+		}
+        if (self->socket6FDBytesAvailable > 0) {
+			[self suspendReceive6Source];
+		}
+	};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_async(socketQueue, block);
+}
+
+- (void)setReceiveFilter:(GCDAsyncUdpSocketReceiveFilterBlock)filterBlock withQueue:(dispatch_queue_t)filterQueue
+{
+	[self setReceiveFilter:filterBlock withQueue:filterQueue isAsynchronous:YES];
+}
+
+- (void)setReceiveFilter:(GCDAsyncUdpSocketReceiveFilterBlock)filterBlock
+               withQueue:(dispatch_queue_t)filterQueue
+          isAsynchronous:(BOOL)isAsynchronous
+{
+	GCDAsyncUdpSocketReceiveFilterBlock newFilterBlock = NULL;
+	dispatch_queue_t newFilterQueue = NULL;
+	
+	if (filterBlock)
+	{
+		NSAssert(filterQueue, @"Must provide a dispatch_queue in which to run the filter block.");
+		
+		newFilterBlock = [filterBlock copy];
+		newFilterQueue = filterQueue;
+		#if !OS_OBJECT_USE_OBJC
+		dispatch_retain(newFilterQueue);
+		#endif
+	}
+	
+	dispatch_block_t block = ^{
+		
+		#if !OS_OBJECT_USE_OBJC
+        if (self->receiveFilterQueue) dispatch_release(self->receiveFilterQueue);
+		#endif
+		
+        self->receiveFilterBlock = newFilterBlock;
+        self->receiveFilterQueue = newFilterQueue;
+        self->receiveFilterAsync = isAsynchronous;
+	};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_async(socketQueue, block);
+}
+
+- (void)doReceive
+{
+	LogTrace();
+	
+	if ((flags & (kReceiveOnce | kReceiveContinuous)) == 0)
+	{
+		LogVerbose(@"Receiving is paused...");
+		
+		if (socket4FDBytesAvailable > 0) {
+			[self suspendReceive4Source];
+		}
+		if (socket6FDBytesAvailable > 0) {
+			[self suspendReceive6Source];
+		}
+		
+		return;
+	}
+	
+	if ((flags & kReceiveOnce) && (pendingFilterOperations > 0))
+	{
+		LogVerbose(@"Receiving is temporarily paused (pending filter operations)...");
+		
+		if (socket4FDBytesAvailable > 0) {
+			[self suspendReceive4Source];
+		}
+		if (socket6FDBytesAvailable > 0) {
+			[self suspendReceive6Source];
+		}
+		
+		return;
+	}
+	
+	if ((socket4FDBytesAvailable == 0) && (socket6FDBytesAvailable == 0))
+	{
+		LogVerbose(@"No data available to receive...");
+		
+		if (socket4FDBytesAvailable == 0) {
+			[self resumeReceive4Source];
+		}
+		if (socket6FDBytesAvailable == 0) {
+			[self resumeReceive6Source];
+		}
+		
+		return;
+	}
+	
+	// Figure out if we should receive on socket4 or socket6
+	
+	BOOL doReceive4;
+	
+	if (flags & kDidConnect)
+	{
+		// Connected socket
+		
+		doReceive4 = (socket4FD != SOCKET_NULL);
+	}
+	else
+	{
+		// Non-Connected socket
+		
+		if (socket4FDBytesAvailable > 0)
+		{
+			if (socket6FDBytesAvailable > 0)
+			{
+				// Bytes available on socket4 & socket6
+				
+				doReceive4 = (flags & kFlipFlop) ? YES : NO;
+				
+				flags ^= kFlipFlop; // flags = flags xor kFlipFlop; (toggle flip flop bit)
+			}
+			else {
+				// Bytes available on socket4, but not socket6
+				doReceive4 = YES;
+			}
+		}
+		else {
+			// Bytes available on socket6, but not socket4
+			doReceive4 = NO;
+		}
+	}
+	
+	// Perform socket IO
+	
+	ssize_t result = 0;
+	
+	NSData *data = nil;
+	NSData *addr4 = nil;
+	NSData *addr6 = nil;
+	
+	if (doReceive4)
+	{
+		NSAssert(socket4FDBytesAvailable > 0, @"Invalid logic");
+		LogVerbose(@"Receiving on IPv4");
+		
+		struct sockaddr_in sockaddr4;
+		socklen_t sockaddr4len = sizeof(sockaddr4);
+		
+		// #222: GCD does not necessarily return the size of an entire UDP packet 
+		// from dispatch_source_get_data(), so we must use the maximum packet size.
+		size_t bufSize = max4ReceiveSize;
+		void *buf = malloc(bufSize);
+		
+		result = recvfrom(socket4FD, buf, bufSize, 0, (struct sockaddr *)&sockaddr4, &sockaddr4len);
+		LogVerbose(@"recvfrom(socket4FD) = %i", (int)result);
+		
+		if (result > 0)
+		{
+			if ((size_t)result >= socket4FDBytesAvailable)
+				socket4FDBytesAvailable = 0;
+			else
+				socket4FDBytesAvailable -= result;
+			
+			if ((size_t)result != bufSize) {
+				buf = realloc(buf, result);
+			}
+			
+			data = [NSData dataWithBytesNoCopy:buf length:result freeWhenDone:YES];
+			addr4 = [NSData dataWithBytes:&sockaddr4 length:sockaddr4len];
+		}
+		else
+		{
+			LogVerbose(@"recvfrom(socket4FD) = %@", [self errnoError]);
+			socket4FDBytesAvailable = 0;
+			free(buf);
+		}
+	}
+	else
+	{
+		NSAssert(socket6FDBytesAvailable > 0, @"Invalid logic");
+		LogVerbose(@"Receiving on IPv6");
+		
+		struct sockaddr_in6 sockaddr6;
+		socklen_t sockaddr6len = sizeof(sockaddr6);
+		
+		// #222: GCD does not necessarily return the size of an entire UDP packet 
+		// from dispatch_source_get_data(), so we must use the maximum packet size.
+		size_t bufSize = max6ReceiveSize;
+		void *buf = malloc(bufSize);
+		
+		result = recvfrom(socket6FD, buf, bufSize, 0, (struct sockaddr *)&sockaddr6, &sockaddr6len);
+		LogVerbose(@"recvfrom(socket6FD) -> %i", (int)result);
+		
+		if (result > 0)
+		{
+			if ((size_t)result >= socket6FDBytesAvailable)
+				socket6FDBytesAvailable = 0;
+			else
+				socket6FDBytesAvailable -= result;
+			
+			if ((size_t)result != bufSize) {
+				buf = realloc(buf, result);
+			}
+		
+			data = [NSData dataWithBytesNoCopy:buf length:result freeWhenDone:YES];
+			addr6 = [NSData dataWithBytes:&sockaddr6 length:sockaddr6len];
+		}
+		else
+		{
+			LogVerbose(@"recvfrom(socket6FD) = %@", [self errnoError]);
+			socket6FDBytesAvailable = 0;
+			free(buf);
+		}
+	}
+	
+	
+	BOOL waitingForSocket = NO;
+	BOOL notifiedDelegate = NO;
+	BOOL ignored = NO;
+	
+	NSError *socketError = nil;
+	
+	if (result == 0)
+	{
+		waitingForSocket = YES;
+	}
+	else if (result < 0)
+	{
+		if (errno == EAGAIN)
+			waitingForSocket = YES;
+		else
+			socketError = [self errnoErrorWithReason:@"Error in recvfrom() function"];
+	}
+	else
+	{
+		if (flags & kDidConnect)
+		{
+			if (addr4 && ![self isConnectedToAddress4:addr4])
+				ignored = YES;
+			if (addr6 && ![self isConnectedToAddress6:addr6])
+				ignored = YES;
+		}
+		
+		NSData *addr = (addr4 != nil) ? addr4 : addr6;
+		
+		if (!ignored)
+		{
+			if (receiveFilterBlock && receiveFilterQueue)
+			{
+				// Run data through filter, and if approved, notify delegate
+				
+				__block id filterContext = nil;
+				__block BOOL allowed = NO;
+				
+				if (receiveFilterAsync)
+				{
+					pendingFilterOperations++;
+					dispatch_async(receiveFilterQueue, ^{ @autoreleasepool {
+						
+                        allowed = self->receiveFilterBlock(data, addr, &filterContext);
+						
+						// Transition back to socketQueue to get the current delegate / delegateQueue
+                        dispatch_async(self->socketQueue, ^{ @autoreleasepool {
+							
+                            self->pendingFilterOperations--;
+							
+							if (allowed)
+							{
+								[self notifyDidReceiveData:data fromAddress:addr withFilterContext:filterContext];
+							}
+							else
+							{
+								LogVerbose(@"received packet silently dropped by receiveFilter");
+							}
+							
+                            if (self->flags & kReceiveOnce)
+							{
+								if (allowed)
+								{
+									// The delegate has been notified,
+									// so our receive once operation has completed.
+                                    self->flags &= ~kReceiveOnce;
+								}
+                                else if (self->pendingFilterOperations == 0)
+								{
+									// All pending filter operations have completed,
+									// and none were allowed through.
+									// Our receive once operation hasn't completed yet.
+									[self doReceive];
+								}
+							}
+						}});
+					}});
+				}
+				else // if (!receiveFilterAsync)
+				{
+					dispatch_sync(receiveFilterQueue, ^{ @autoreleasepool {
+						
+                        allowed = self->receiveFilterBlock(data, addr, &filterContext);
+					}});
+					
+					if (allowed)
+					{
+						[self notifyDidReceiveData:data fromAddress:addr withFilterContext:filterContext];
+						notifiedDelegate = YES;
+					}
+					else
+					{
+						LogVerbose(@"received packet silently dropped by receiveFilter");
+						ignored = YES;
+					}
+				}
+			}
+			else // if (!receiveFilterBlock || !receiveFilterQueue)
+			{
+				[self notifyDidReceiveData:data fromAddress:addr withFilterContext:nil];
+				notifiedDelegate = YES;
+			}
+		}
+	}
+	
+	if (waitingForSocket)
+	{
+		// Wait for a notification of available data.
+		
+		if (socket4FDBytesAvailable == 0) {
+			[self resumeReceive4Source];
+		}
+		if (socket6FDBytesAvailable == 0) {
+			[self resumeReceive6Source];
+		}
+	}
+	else if (socketError)
+	{
+		[self closeWithError:socketError];
+	}
+	else
+	{
+		if (flags & kReceiveContinuous)
+		{
+			// Continuous receive mode
+			[self doReceive];
+		}
+		else
+		{
+			// One-at-a-time receive mode
+			if (notifiedDelegate)
+			{
+				// The delegate has been notified (no set filter).
+				// So our receive once operation has completed.
+				flags &= ~kReceiveOnce;
+			}
+			else if (ignored)
+			{
+				[self doReceive];
+			}
+			else
+			{
+				// Waiting on asynchronous receive filter...
+			}
+		}
+	}
+}
+
+- (void)doReceiveEOF
+{
+	LogTrace();
+	
+	[self closeWithError:[self socketClosedError]];
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+#pragma mark Closing
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+- (void)closeWithError:(NSError *)error
+{
+	LogVerbose(@"closeWithError: %@", error);
+	
+	NSAssert(dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey), @"Must be dispatched on socketQueue");
+	
+	if (currentSend) [self endCurrentSend];
+	
+	[sendQueue removeAllObjects];
+	
+	// If a socket has been created, we should notify the delegate.
+	BOOL shouldCallDelegate = (flags & kDidCreateSockets) ? YES : NO;
+	
+	// Close all sockets, send/receive sources, cfstreams, etc
+#if TARGET_OS_IPHONE
+	[self removeStreamsFromRunLoop];
+	[self closeReadAndWriteStreams];
+#endif
+	[self closeSockets];
+	
+	// Clear all flags (config remains as is)
+	flags = 0;
+	
+	if (shouldCallDelegate)
+	{
+		[self notifyDidCloseWithError:error];
+	}
+}
+
+- (void)close
+{
+	LogTrace();
+	
+	dispatch_block_t block = ^{ @autoreleasepool {
+		
+		[self closeWithError:nil];
+	}};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_sync(socketQueue, block);
+}
+
+- (void)closeAfterSending
+{
+	LogTrace();
+	
+	dispatch_block_t block = ^{ @autoreleasepool {
+		
+        self->flags |= kCloseAfterSends;
+		
+        if (self->currentSend == nil && [self->sendQueue count] == 0)
+		{
+			[self closeWithError:nil];
+		}
+	}};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_async(socketQueue, block);
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+#pragma mark CFStream
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+#if TARGET_OS_IPHONE
+
+static NSThread *listenerThread;
+
++ (void)ignore:(id)_
+{}
+
++ (void)startListenerThreadIfNeeded
+{
+	static dispatch_once_t predicate;
+	dispatch_once(&predicate, ^{
+		
+		listenerThread = [[NSThread alloc] initWithTarget:self
+		                                         selector:@selector(listenerThread)
+		                                           object:nil];
+		[listenerThread start];
+	});
+}
+
++ (void)listenerThread
+{
+	@autoreleasepool {
+	
+		[[NSThread currentThread] setName:GCDAsyncUdpSocketThreadName];
+		
+		LogInfo(@"ListenerThread: Started");
+		
+		// We can't run the run loop unless it has an associated input source or a timer.
+		// So we'll just create a timer that will never fire - unless the server runs for a decades.
+		[NSTimer scheduledTimerWithTimeInterval:[[NSDate distantFuture] timeIntervalSinceNow]
+		                                 target:self
+		                               selector:@selector(ignore:)
+		                               userInfo:nil
+		                                repeats:YES];
+		
+		[[NSRunLoop currentRunLoop] run];
+		
+		LogInfo(@"ListenerThread: Stopped");
+	}
+}
+
++ (void)addStreamListener:(GCDAsyncUdpSocket *)asyncUdpSocket
+{
+	LogTrace();
+	NSAssert([NSThread currentThread] == listenerThread, @"Invoked on wrong thread");
+	
+	CFRunLoopRef runLoop = CFRunLoopGetCurrent();
+	
+	if (asyncUdpSocket->readStream4)
+		CFReadStreamScheduleWithRunLoop(asyncUdpSocket->readStream4, runLoop, kCFRunLoopDefaultMode);
+	
+	if (asyncUdpSocket->readStream6)
+		CFReadStreamScheduleWithRunLoop(asyncUdpSocket->readStream6, runLoop, kCFRunLoopDefaultMode);
+	
+	if (asyncUdpSocket->writeStream4)
+		CFWriteStreamScheduleWithRunLoop(asyncUdpSocket->writeStream4, runLoop, kCFRunLoopDefaultMode);
+	
+	if (asyncUdpSocket->writeStream6)
+		CFWriteStreamScheduleWithRunLoop(asyncUdpSocket->writeStream6, runLoop, kCFRunLoopDefaultMode);
+}
+
++ (void)removeStreamListener:(GCDAsyncUdpSocket *)asyncUdpSocket
+{
+	LogTrace();
+	NSAssert([NSThread currentThread] == listenerThread, @"Invoked on wrong thread");
+	
+	CFRunLoopRef runLoop = CFRunLoopGetCurrent();
+	
+	if (asyncUdpSocket->readStream4)
+		CFReadStreamUnscheduleFromRunLoop(asyncUdpSocket->readStream4, runLoop, kCFRunLoopDefaultMode);
+	
+	if (asyncUdpSocket->readStream6)
+		CFReadStreamUnscheduleFromRunLoop(asyncUdpSocket->readStream6, runLoop, kCFRunLoopDefaultMode);
+	
+	if (asyncUdpSocket->writeStream4)
+		CFWriteStreamUnscheduleFromRunLoop(asyncUdpSocket->writeStream4, runLoop, kCFRunLoopDefaultMode);
+	
+	if (asyncUdpSocket->writeStream6)
+		CFWriteStreamUnscheduleFromRunLoop(asyncUdpSocket->writeStream6, runLoop, kCFRunLoopDefaultMode);
+}
+
+static void CFReadStreamCallback(CFReadStreamRef stream, CFStreamEventType type, void *pInfo)
+{
+	@autoreleasepool {
+		GCDAsyncUdpSocket *asyncUdpSocket = (__bridge GCDAsyncUdpSocket *)pInfo;
+	
+		switch(type)
+		{
+			case kCFStreamEventOpenCompleted:
+			{
+				LogCVerbose(@"CFReadStreamCallback - Open");
+				break;
+			}
+			case kCFStreamEventHasBytesAvailable:
+			{
+				LogCVerbose(@"CFReadStreamCallback - HasBytesAvailable");
+				break;
+			}
+			case kCFStreamEventErrorOccurred:
+			case kCFStreamEventEndEncountered:
+			{
+				NSError *error = (__bridge_transfer NSError *)CFReadStreamCopyError(stream);
+				if (error == nil && type == kCFStreamEventEndEncountered)
+				{
+					error = [asyncUdpSocket socketClosedError];
+				}
+				
+				dispatch_async(asyncUdpSocket->socketQueue, ^{ @autoreleasepool {
+					
+					LogCVerbose(@"CFReadStreamCallback - %@",
+					             (type == kCFStreamEventErrorOccurred) ? @"Error" : @"EndEncountered");
+					
+					if (stream != asyncUdpSocket->readStream4 &&
+					    stream != asyncUdpSocket->readStream6  )
+					{
+						LogCVerbose(@"CFReadStreamCallback - Ignored");
+						return_from_block;
+					}
+					
+					[asyncUdpSocket closeWithError:error];
+					
+				}});
+				
+				break;
+			}
+			default:
+			{
+				LogCError(@"CFReadStreamCallback - UnknownType: %i", (int)type);
+			}
+		}
+	}
+}
+
+static void CFWriteStreamCallback(CFWriteStreamRef stream, CFStreamEventType type, void *pInfo)
+{
+	@autoreleasepool {
+		GCDAsyncUdpSocket *asyncUdpSocket = (__bridge GCDAsyncUdpSocket *)pInfo;
+		
+		switch(type)
+		{
+			case kCFStreamEventOpenCompleted:
+			{
+				LogCVerbose(@"CFWriteStreamCallback - Open");
+				break;
+			}
+			case kCFStreamEventCanAcceptBytes:
+			{
+				LogCVerbose(@"CFWriteStreamCallback - CanAcceptBytes");
+				break;
+			}
+			case kCFStreamEventErrorOccurred:
+			case kCFStreamEventEndEncountered:
+			{
+				NSError *error = (__bridge_transfer NSError *)CFWriteStreamCopyError(stream);
+				if (error == nil && type == kCFStreamEventEndEncountered)
+				{
+					error = [asyncUdpSocket socketClosedError];
+				}
+				
+				dispatch_async(asyncUdpSocket->socketQueue, ^{ @autoreleasepool {
+					
+					LogCVerbose(@"CFWriteStreamCallback - %@",
+					             (type == kCFStreamEventErrorOccurred) ? @"Error" : @"EndEncountered");
+					
+					if (stream != asyncUdpSocket->writeStream4 &&
+					    stream != asyncUdpSocket->writeStream6  )
+					{
+						LogCVerbose(@"CFWriteStreamCallback - Ignored");
+						return_from_block;
+					}
+					
+					[asyncUdpSocket closeWithError:error];
+					
+				}});
+				
+				break;
+			}
+			default:
+			{
+				LogCError(@"CFWriteStreamCallback - UnknownType: %i", (int)type);
+			}
+		}
+	}
+}
+
+- (BOOL)createReadAndWriteStreams:(NSError **)errPtr
+{
+	LogTrace();
+	NSAssert(dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey), @"Must be dispatched on socketQueue");
+	
+	NSError *err = nil;
+	
+	if (readStream4 || writeStream4 || readStream6 || writeStream6)
+	{
+		// Streams already created
+		return YES;
+	}
+	
+	if (socket4FD == SOCKET_NULL && socket6FD == SOCKET_NULL)
+	{
+		err = [self otherError:@"Cannot create streams without a file descriptor"];
+		goto Failed;
+	}
+	
+	// Create streams
+	
+	LogVerbose(@"Creating read and write stream(s)...");
+	
+	if (socket4FD != SOCKET_NULL)
+	{
+		CFStreamCreatePairWithSocket(NULL, (CFSocketNativeHandle)socket4FD, &readStream4, &writeStream4);
+		if (!readStream4 || !writeStream4)
+		{
+			err = [self otherError:@"Error in CFStreamCreatePairWithSocket() [IPv4]"];
+			goto Failed;
+		}
+	}
+	
+	if (socket6FD != SOCKET_NULL)
+	{
+		CFStreamCreatePairWithSocket(NULL, (CFSocketNativeHandle)socket6FD, &readStream6, &writeStream6);
+		if (!readStream6 || !writeStream6)
+		{
+			err = [self otherError:@"Error in CFStreamCreatePairWithSocket() [IPv6]"];
+			goto Failed;
+		}
+	}
+	
+	// Ensure the CFStream's don't close our underlying socket
+	
+	CFReadStreamSetProperty(readStream4, kCFStreamPropertyShouldCloseNativeSocket, kCFBooleanFalse);
+	CFWriteStreamSetProperty(writeStream4, kCFStreamPropertyShouldCloseNativeSocket, kCFBooleanFalse);
+	
+	CFReadStreamSetProperty(readStream6, kCFStreamPropertyShouldCloseNativeSocket, kCFBooleanFalse);
+	CFWriteStreamSetProperty(writeStream6, kCFStreamPropertyShouldCloseNativeSocket, kCFBooleanFalse);
+	
+	return YES;
+	
+Failed:
+	if (readStream4)
+	{
+		CFReadStreamClose(readStream4);
+		CFRelease(readStream4);
+		readStream4 = NULL;
+	}
+	if (writeStream4)
+	{
+		CFWriteStreamClose(writeStream4);
+		CFRelease(writeStream4);
+		writeStream4 = NULL;
+	}
+	if (readStream6)
+	{
+		CFReadStreamClose(readStream6);
+		CFRelease(readStream6);
+		readStream6 = NULL;
+	}
+	if (writeStream6)
+	{
+		CFWriteStreamClose(writeStream6);
+		CFRelease(writeStream6);
+		writeStream6 = NULL;
+	}
+	
+	if (errPtr)
+		*errPtr = err;
+	
+	return NO;
+}
+
+- (BOOL)registerForStreamCallbacks:(NSError **)errPtr
+{
+	LogTrace();
+	
+	NSAssert(dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey), @"Must be dispatched on socketQueue");
+	NSAssert(readStream4 || writeStream4 || readStream6 || writeStream6, @"Read/Write streams are null");
+	
+	NSError *err = nil;
+	
+	streamContext.version = 0;
+	streamContext.info = (__bridge void *)self;
+	streamContext.retain = nil;
+	streamContext.release = nil;
+	streamContext.copyDescription = nil;
+	
+	CFOptionFlags readStreamEvents = kCFStreamEventErrorOccurred | kCFStreamEventEndEncountered;
+	CFOptionFlags writeStreamEvents = kCFStreamEventErrorOccurred | kCFStreamEventEndEncountered;
+	
+//	readStreamEvents  |= (kCFStreamEventOpenCompleted | kCFStreamEventHasBytesAvailable);
+//	writeStreamEvents |= (kCFStreamEventOpenCompleted | kCFStreamEventCanAcceptBytes);
+	
+	if (socket4FD != SOCKET_NULL)
+	{
+		if (readStream4 == NULL || writeStream4 == NULL)
+		{
+			err = [self otherError:@"Read/Write stream4 is null"];
+			goto Failed;
+		}
+		
+		BOOL r1 = CFReadStreamSetClient(readStream4, readStreamEvents, &CFReadStreamCallback, &streamContext);
+		BOOL r2 = CFWriteStreamSetClient(writeStream4, writeStreamEvents, &CFWriteStreamCallback, &streamContext);
+		
+		if (!r1 || !r2)
+		{
+			err = [self otherError:@"Error in CFStreamSetClient(), [IPv4]"];
+			goto Failed;
+		}
+	}
+	
+	if (socket6FD != SOCKET_NULL)
+	{
+		if (readStream6 == NULL || writeStream6 == NULL)
+		{
+			err = [self otherError:@"Read/Write stream6 is null"];
+			goto Failed;
+		}
+		
+		BOOL r1 = CFReadStreamSetClient(readStream6, readStreamEvents, &CFReadStreamCallback, &streamContext);
+		BOOL r2 = CFWriteStreamSetClient(writeStream6, writeStreamEvents, &CFWriteStreamCallback, &streamContext);
+		
+		if (!r1 || !r2)
+		{
+			err = [self otherError:@"Error in CFStreamSetClient() [IPv6]"];
+			goto Failed;
+		}
+	}
+	
+	return YES;
+	
+Failed:
+	if (readStream4) {
+		CFReadStreamSetClient(readStream4, kCFStreamEventNone, NULL, NULL);
+	}
+	if (writeStream4) {
+		CFWriteStreamSetClient(writeStream4, kCFStreamEventNone, NULL, NULL);
+	}
+	if (readStream6) {
+		CFReadStreamSetClient(readStream6, kCFStreamEventNone, NULL, NULL);
+	}
+	if (writeStream6) {
+		CFWriteStreamSetClient(writeStream6, kCFStreamEventNone, NULL, NULL);
+	}
+	
+	if (errPtr) *errPtr = err;
+	return NO;
+}
+
+- (BOOL)addStreamsToRunLoop:(NSError **)errPtr
+{
+	LogTrace();
+	
+	NSAssert(dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey), @"Must be dispatched on socketQueue");
+	NSAssert(readStream4 || writeStream4 || readStream6 || writeStream6, @"Read/Write streams are null");
+	
+	if (!(flags & kAddedStreamListener))
+	{
+		[[self class] startListenerThreadIfNeeded];
+		[[self class] performSelector:@selector(addStreamListener:)
+		                     onThread:listenerThread
+		                   withObject:self
+		                waitUntilDone:YES];
+		
+		flags |= kAddedStreamListener;
+	}
+	
+	return YES;
+}
+
+- (BOOL)openStreams:(NSError **)errPtr
+{
+	LogTrace();
+	
+	NSAssert(dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey), @"Must be dispatched on socketQueue");
+	NSAssert(readStream4 || writeStream4 || readStream6 || writeStream6, @"Read/Write streams are null");
+	
+	NSError *err = nil;
+	
+	if (socket4FD != SOCKET_NULL)
+	{
+		BOOL r1 = CFReadStreamOpen(readStream4);
+		BOOL r2 = CFWriteStreamOpen(writeStream4);
+		
+		if (!r1 || !r2)
+		{
+			err = [self otherError:@"Error in CFStreamOpen() [IPv4]"];
+			goto Failed;
+		}
+	}
+	
+	if (socket6FD != SOCKET_NULL)
+	{
+		BOOL r1 = CFReadStreamOpen(readStream6);
+		BOOL r2 = CFWriteStreamOpen(writeStream6);
+		
+		if (!r1 || !r2)
+		{
+			err = [self otherError:@"Error in CFStreamOpen() [IPv6]"];
+			goto Failed;
+		}
+	}
+	
+	return YES;
+	
+Failed:
+	if (errPtr) *errPtr = err;
+	return NO;
+}
+
+- (void)removeStreamsFromRunLoop
+{
+	LogTrace();
+	NSAssert(dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey), @"Must be dispatched on socketQueue");
+	
+	if (flags & kAddedStreamListener)
+	{
+		[[self class] performSelector:@selector(removeStreamListener:)
+		                     onThread:listenerThread
+		                   withObject:self
+		                waitUntilDone:YES];
+		
+		flags &= ~kAddedStreamListener;
+	}
+}
+
+- (void)closeReadAndWriteStreams
+{
+	LogTrace();
+	
+	if (readStream4)
+	{
+		CFReadStreamSetClient(readStream4, kCFStreamEventNone, NULL, NULL);
+		CFReadStreamClose(readStream4);
+		CFRelease(readStream4);
+		readStream4 = NULL;
+	}
+	if (writeStream4)
+	{
+		CFWriteStreamSetClient(writeStream4, kCFStreamEventNone, NULL, NULL);
+		CFWriteStreamClose(writeStream4);
+		CFRelease(writeStream4);
+		writeStream4 = NULL;
+	}
+	if (readStream6)
+	{
+		CFReadStreamSetClient(readStream6, kCFStreamEventNone, NULL, NULL);
+		CFReadStreamClose(readStream6);
+		CFRelease(readStream6);
+		readStream6 = NULL;
+	}
+	if (writeStream6)
+	{
+		CFWriteStreamSetClient(writeStream6, kCFStreamEventNone, NULL, NULL);
+		CFWriteStreamClose(writeStream6);
+		CFRelease(writeStream6);
+		writeStream6 = NULL;
+	}
+}
+
+#endif
+
+- (void)applicationWillEnterForeground:(NSNotification *)notification
+{
+	LogTrace();
+	
+	// If the application was backgrounded, then iOS may have shut down our sockets.
+	// So we take a quick look to see if any of them received an EOF.
+	
+	dispatch_block_t block = ^{ @autoreleasepool {
+		
+		[self resumeReceive4Source];
+		[self resumeReceive6Source];
+	}};
+	
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_async(socketQueue, block);
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+#pragma mark Advanced
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+/**
+ * See header file for big discussion of this method.
+ **/
+- (void)markSocketQueueTargetQueue:(dispatch_queue_t)socketNewTargetQueue
+{
+	void *nonNullUnusedPointer = (__bridge void *)self;
+	dispatch_queue_set_specific(socketNewTargetQueue, IsOnSocketQueueOrTargetQueueKey, nonNullUnusedPointer, NULL);
+}
+
+/**
+ * See header file for big discussion of this method.
+ **/
+- (void)unmarkSocketQueueTargetQueue:(dispatch_queue_t)socketOldTargetQueue
+{
+	dispatch_queue_set_specific(socketOldTargetQueue, IsOnSocketQueueOrTargetQueueKey, NULL, NULL);
+}
+
+- (void)performBlock:(dispatch_block_t)block
+{
+	if (dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+		block();
+	else
+		dispatch_sync(socketQueue, block);
+}
+
+- (int)socketFD
+{
+	if (! dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+	{
+		LogWarn(@"%@: %@ - Method only available from within the context of a performBlock: invocation",
+				THIS_FILE, THIS_METHOD);
+		return SOCKET_NULL;
+	}
+	
+	if (socket4FD != SOCKET_NULL)
+		return socket4FD;
+	else
+		return socket6FD;
+}
+
+- (int)socket4FD
+{
+	if (! dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+	{
+		LogWarn(@"%@: %@ - Method only available from within the context of a performBlock: invocation",
+				THIS_FILE, THIS_METHOD);
+		return SOCKET_NULL;
+	}
+	
+	return socket4FD;
+}
+
+- (int)socket6FD
+{
+	if (! dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+	{
+		LogWarn(@"%@: %@ - Method only available from within the context of a performBlock: invocation",
+				THIS_FILE, THIS_METHOD);
+		return SOCKET_NULL;
+	}
+	
+	return socket6FD;
+}
+
+#if TARGET_OS_IPHONE
+
+- (CFReadStreamRef)readStream
+{
+	if (! dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+	{
+		LogWarn(@"%@: %@ - Method only available from within the context of a performBlock: invocation",
+				THIS_FILE, THIS_METHOD);
+		return NULL;
+	}
+	
+	NSError *err = nil;
+	if (![self createReadAndWriteStreams:&err])
+	{
+		LogError(@"Error creating CFStream(s): %@", err);
+		return NULL;
+	}
+	
+	// Todo...
+	
+	if (readStream4)
+		return readStream4;
+	else
+		return readStream6;
+}
+
+- (CFWriteStreamRef)writeStream
+{
+	if (! dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+	{
+		LogWarn(@"%@: %@ - Method only available from within the context of a performBlock: invocation",
+				THIS_FILE, THIS_METHOD);
+		return NULL;
+	}
+	
+	NSError *err = nil;
+	if (![self createReadAndWriteStreams:&err])
+	{
+		LogError(@"Error creating CFStream(s): %@", err);
+		return NULL;
+	}
+	
+	if (writeStream4)
+		return writeStream4;
+	else
+		return writeStream6;
+}
+
+- (BOOL)enableBackgroundingOnSockets
+{
+	if (! dispatch_get_specific(IsOnSocketQueueOrTargetQueueKey))
+	{
+		LogWarn(@"%@: %@ - Method only available from within the context of a performBlock: invocation",
+				THIS_FILE, THIS_METHOD);
+		return NO;
+	}
+	
+	// Why is this commented out?
+	// See comments below.
+	
+//	NSError *err = nil;
+//	if (![self createReadAndWriteStreams:&err])
+//	{
+//		LogError(@"Error creating CFStream(s): %@", err);
+//		return NO;
+//	}
+//	
+//	LogVerbose(@"Enabling backgrouding on socket");
+//	
+//	BOOL r1, r2;
+//	
+//	if (readStream4 && writeStream4)
+//	{
+//		r1 = CFReadStreamSetProperty(readStream4, kCFStreamNetworkServiceType, kCFStreamNetworkServiceTypeVoIP);
+//		r2 = CFWriteStreamSetProperty(writeStream4, kCFStreamNetworkServiceType, kCFStreamNetworkServiceTypeVoIP);
+//		
+//		if (!r1 || !r2)
+//		{
+//			LogError(@"Error setting voip type (IPv4)");
+//			return NO;
+//		}
+//	}
+//	
+//	if (readStream6 && writeStream6)
+//	{
+//		r1 = CFReadStreamSetProperty(readStream6, kCFStreamNetworkServiceType, kCFStreamNetworkServiceTypeVoIP);
+//		r2 = CFWriteStreamSetProperty(writeStream6, kCFStreamNetworkServiceType, kCFStreamNetworkServiceTypeVoIP);
+//		
+//		if (!r1 || !r2)
+//		{
+//			LogError(@"Error setting voip type (IPv6)");
+//			return NO;
+//		}
+//	}
+//	
+//	return YES;
+	
+	// The above code will actually appear to work.
+	// The methods will return YES, and everything will appear fine.
+	// 
+	// One tiny problem: the sockets will still get closed when the app gets backgrounded.
+	// 
+	// Apple does not officially support backgrounding UDP sockets.
+	
+	return NO;
+}
+
+#endif
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+#pragma mark Class Methods
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
++ (NSString *)hostFromSockaddr4:(const struct sockaddr_in *)pSockaddr4
+{
+	char addrBuf[INET_ADDRSTRLEN];
+	
+	if (inet_ntop(AF_INET, &pSockaddr4->sin_addr, addrBuf, (socklen_t)sizeof(addrBuf)) == NULL)
+	{
+		addrBuf[0] = '\0';
+	}
+	
+	return [NSString stringWithCString:addrBuf encoding:NSASCIIStringEncoding];
+}
+
++ (NSString *)hostFromSockaddr6:(const struct sockaddr_in6 *)pSockaddr6
+{
+	char addrBuf[INET6_ADDRSTRLEN];
+	
+	if (inet_ntop(AF_INET6, &pSockaddr6->sin6_addr, addrBuf, (socklen_t)sizeof(addrBuf)) == NULL)
+	{
+		addrBuf[0] = '\0';
+	}
+	
+	return [NSString stringWithCString:addrBuf encoding:NSASCIIStringEncoding];
+}
+
++ (uint16_t)portFromSockaddr4:(const struct sockaddr_in *)pSockaddr4
+{
+	return ntohs(pSockaddr4->sin_port);
+}
+
++ (uint16_t)portFromSockaddr6:(const struct sockaddr_in6 *)pSockaddr6
+{
+	return ntohs(pSockaddr6->sin6_port);
+}
+
++ (NSString *)hostFromAddress:(NSData *)address
+{
+	NSString *host = nil;
+	[self getHost:&host port:NULL family:NULL fromAddress:address];
+	
+	return host;
+}
+
++ (uint16_t)portFromAddress:(NSData *)address
+{
+	uint16_t port = 0;
+	[self getHost:NULL port:&port family:NULL fromAddress:address];
+	
+	return port;
+}
+
++ (int)familyFromAddress:(NSData *)address
+{
+	int af = AF_UNSPEC;
+	[self getHost:NULL port:NULL family:&af fromAddress:address];
+	
+	return af;
+}
+
++ (BOOL)isIPv4Address:(NSData *)address
+{
+	int af = AF_UNSPEC;
+	[self getHost:NULL port:NULL family:&af fromAddress:address];
+	
+	return (af == AF_INET);
+}
+
++ (BOOL)isIPv6Address:(NSData *)address
+{
+	int af = AF_UNSPEC;
+	[self getHost:NULL port:NULL family:&af fromAddress:address];
+	
+	return (af == AF_INET6);
+}
+
++ (BOOL)getHost:(NSString **)hostPtr port:(uint16_t *)portPtr fromAddress:(NSData *)address
+{
+	return [self getHost:hostPtr port:portPtr family:NULL fromAddress:address];
+}
+
++ (BOOL)getHost:(NSString **)hostPtr port:(uint16_t *)portPtr family:(int *)afPtr fromAddress:(NSData *)address
+{
+	if ([address length] >= sizeof(struct sockaddr))
+	{
+		const struct sockaddr *addrX = (const struct sockaddr *)[address bytes];
+		
+		if (addrX->sa_family == AF_INET)
+		{
+			if ([address length] >= sizeof(struct sockaddr_in))
+			{
+				const struct sockaddr_in *addr4 = (const struct sockaddr_in *)addrX;
+				
+				if (hostPtr) *hostPtr = [self hostFromSockaddr4:addr4];
+				if (portPtr) *portPtr = [self portFromSockaddr4:addr4];
+				if (afPtr)   *afPtr   = AF_INET;
+				
+				return YES;
+			}
+		}
+		else if (addrX->sa_family == AF_INET6)
+		{
+			if ([address length] >= sizeof(struct sockaddr_in6))
+			{
+				const struct sockaddr_in6 *addr6 = (const struct sockaddr_in6 *)addrX;
+				
+				if (hostPtr) *hostPtr = [self hostFromSockaddr6:addr6];
+				if (portPtr) *portPtr = [self portFromSockaddr6:addr6];
+				if (afPtr)   *afPtr   = AF_INET6;
+				
+				return YES;
+			}
+		}
+	}
+	
+	if (hostPtr) *hostPtr = nil;
+	if (portPtr) *portPtr = 0;
+	if (afPtr)   *afPtr   = AF_UNSPEC;
+	
+	return NO;
+}
+
+@end
diff --git a/Pods/HTTPParserC/LICENSE b/Pods/HTTPParserC/LICENSE
new file mode 100644
index 0000000..046305d
--- /dev/null
+++ b/Pods/HTTPParserC/LICENSE
@@ -0,0 +1,25 @@
+MIT License
+
+http_parser.c is based on src/http/ngx_http_parse.c
+from NGINX copyright Igor Sysoev.
+
+Additional changes are licensed under the same terms as NGINX and
+copyright Joyent, Inc. and other Node contributors. All rights reserved.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to
+deal in the Software without restriction, including without limitation the
+rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+sell copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+IN THE SOFTWARE. 
diff --git a/Pods/HTTPParserC/README.md b/Pods/HTTPParserC/README.md
new file mode 100644
index 0000000..8f0aaf3
--- /dev/null
+++ b/Pods/HTTPParserC/README.md
@@ -0,0 +1,79 @@
+HTTP Parser
+===========
+
+[![Build Status](https://travis-ci.org/Building42/HTTPParserC.svg?branch=master)](https://travis-ci.org/Building42/HTTPParserC)
+[![Version](https://img.shields.io/cocoapods/v/HTTPParserC.svg)](https://cocoapods.org/pods/HTTPParserC)
+[![Carthage Compatible](https://img.shields.io/badge/Carthage-compatible-4BC51D.svg)](https://github.com/Carthage/Carthage)
+[![License](https://img.shields.io/cocoapods/l/HTTPParserC.svg)](https://cocoapods.org/pods/HTTPParserC)
+[![Platform](https://img.shields.io/cocoapods/p/HTTPParserC.svg)](https://cocoapods.org/pods/HTTPParserC)
+
+HTTP message parser written in C. It parses both requests and
+responses. The parser is designed to be used in performance HTTP
+applications. It does not make any syscalls nor allocations, it does not
+buffer data, it can be interrupted at anytime. Depending on your
+architecture, it only requires about 40 bytes of data per message
+stream (in a web server that is per connection).
+
+Features:
+
+  * No dependencies
+  * Handles persistent streams (keep-alive).
+  * Decodes chunked encoding.
+  * Upgrade support
+  * Defends against buffer overflow attacks.
+
+The parser extracts the following information from HTTP messages:
+
+  * Header fields and values
+  * Content-Length
+  * Request method
+  * Response status code
+  * Transfer-Encoding
+  * HTTP version
+  * Request URL
+  * Message body
+
+## Installation
+
+### CocoaPods
+
+[CocoaPods](http://cocoapods.org) is a dependency manager for Cocoa projects. You can install it with the following command:
+
+```bash
+$ gem install cocoapods
+```
+
+To integrate the HTTP Parser C library into your Xcode project using CocoaPods, specify it in your `Podfile`:
+
+```ruby
+use_frameworks!
+pod 'Telegraph'
+```
+
+Then, run the following command:
+
+```bash
+$ pod install
+```
+
+### Carthage
+
+[Carthage](https://github.com/Carthage/Carthage) is a decentralized dependency manager that builds your dependencies and provides you with binary frameworks.
+
+You can install Carthage with [Homebrew](http://brew.sh/) using the following command:
+
+```bash
+$ brew update
+$ brew install carthage
+```
+
+To integrate HTTPParserC into your Xcode project using Carthage, specify it in your `Cartfile`:
+
+```ogdl
+github "Building42/HTTPParserC"
+```
+
+Run `carthage update` to build the framework and drag the built `HTTPParserC.framework` into your Xcode project.
+
+## Documentation
+Visit https://github.com/nodejs/http-parser for more information
diff --git a/Pods/HTTPParserC/Sources/http_parser.c b/Pods/HTTPParserC/Sources/http_parser.c
new file mode 100644
index 0000000..4896385
--- /dev/null
+++ b/Pods/HTTPParserC/Sources/http_parser.c
@@ -0,0 +1,2498 @@
+/* Copyright Joyent, Inc. and other Node contributors.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+#include "http_parser.h"
+#include <assert.h>
+#include <stddef.h>
+#include <ctype.h>
+#include <string.h>
+#include <limits.h>
+
+static uint32_t max_header_size = HTTP_MAX_HEADER_SIZE;
+
+#ifndef ULLONG_MAX
+# define ULLONG_MAX ((uint64_t) -1) /* 2^64-1 */
+#endif
+
+#ifndef MIN
+# define MIN(a,b) ((a) < (b) ? (a) : (b))
+#endif
+
+#ifndef ARRAY_SIZE
+# define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
+#endif
+
+#ifndef BIT_AT
+# define BIT_AT(a, i)                                                \
+  (!!((unsigned int) (a)[(unsigned int) (i) >> 3] &                  \
+   (1 << ((unsigned int) (i) & 7))))
+#endif
+
+#ifndef ELEM_AT
+# define ELEM_AT(a, i, v) ((unsigned int) (i) < ARRAY_SIZE(a) ? (a)[(i)] : (v))
+#endif
+
+#define SET_ERRNO(e)                                                 \
+do {                                                                 \
+  parser->nread = nread;                                             \
+  parser->http_errno = (e);                                          \
+} while(0)
+
+#define CURRENT_STATE() p_state
+#define UPDATE_STATE(V) p_state = (enum state) (V);
+#define RETURN(V)                                                    \
+do {                                                                 \
+  parser->nread = nread;                                             \
+  parser->state = CURRENT_STATE();                                   \
+  return (V);                                                        \
+} while (0);
+#define REEXECUTE()                                                  \
+  goto reexecute;                                                    \
+
+
+#ifdef __GNUC__
+# define LIKELY(X) __builtin_expect(!!(X), 1)
+# define UNLIKELY(X) __builtin_expect(!!(X), 0)
+#else
+# define LIKELY(X) (X)
+# define UNLIKELY(X) (X)
+#endif
+
+
+/* Run the notify callback FOR, returning ER if it fails */
+#define CALLBACK_NOTIFY_(FOR, ER)                                    \
+do {                                                                 \
+  assert(HTTP_PARSER_ERRNO(parser) == HPE_OK);                       \
+                                                                     \
+  if (LIKELY(settings->on_##FOR)) {                                  \
+    parser->state = CURRENT_STATE();                                 \
+    if (UNLIKELY(0 != settings->on_##FOR(parser))) {                 \
+      SET_ERRNO(HPE_CB_##FOR);                                       \
+    }                                                                \
+    UPDATE_STATE(parser->state);                                     \
+                                                                     \
+    /* We either errored above or got paused; get out */             \
+    if (UNLIKELY(HTTP_PARSER_ERRNO(parser) != HPE_OK)) {             \
+      return (ER);                                                   \
+    }                                                                \
+  }                                                                  \
+} while (0)
+
+/* Run the notify callback FOR and consume the current byte */
+#define CALLBACK_NOTIFY(FOR)            CALLBACK_NOTIFY_(FOR, p - data + 1)
+
+/* Run the notify callback FOR and don't consume the current byte */
+#define CALLBACK_NOTIFY_NOADVANCE(FOR)  CALLBACK_NOTIFY_(FOR, p - data)
+
+/* Run data callback FOR with LEN bytes, returning ER if it fails */
+#define CALLBACK_DATA_(FOR, LEN, ER)                                 \
+do {                                                                 \
+  assert(HTTP_PARSER_ERRNO(parser) == HPE_OK);                       \
+                                                                     \
+  if (FOR##_mark) {                                                  \
+    if (LIKELY(settings->on_##FOR)) {                                \
+      parser->state = CURRENT_STATE();                               \
+      if (UNLIKELY(0 !=                                              \
+                   settings->on_##FOR(parser, FOR##_mark, (LEN)))) { \
+        SET_ERRNO(HPE_CB_##FOR);                                     \
+      }                                                              \
+      UPDATE_STATE(parser->state);                                   \
+                                                                     \
+      /* We either errored above or got paused; get out */           \
+      if (UNLIKELY(HTTP_PARSER_ERRNO(parser) != HPE_OK)) {           \
+        return (ER);                                                 \
+      }                                                              \
+    }                                                                \
+    FOR##_mark = NULL;                                               \
+  }                                                                  \
+} while (0)
+
+/* Run the data callback FOR and consume the current byte */
+#define CALLBACK_DATA(FOR)                                           \
+    CALLBACK_DATA_(FOR, p - FOR##_mark, p - data + 1)
+
+/* Run the data callback FOR and don't consume the current byte */
+#define CALLBACK_DATA_NOADVANCE(FOR)                                 \
+    CALLBACK_DATA_(FOR, p - FOR##_mark, p - data)
+
+/* Set the mark FOR; non-destructive if mark is already set */
+#define MARK(FOR)                                                    \
+do {                                                                 \
+  if (!FOR##_mark) {                                                 \
+    FOR##_mark = p;                                                  \
+  }                                                                  \
+} while (0)
+
+/* Don't allow the total size of the HTTP headers (including the status
+ * line) to exceed max_header_size.  This check is here to protect
+ * embedders against denial-of-service attacks where the attacker feeds
+ * us a never-ending header that the embedder keeps buffering.
+ *
+ * This check is arguably the responsibility of embedders but we're doing
+ * it on the embedder's behalf because most won't bother and this way we
+ * make the web a little safer.  max_header_size is still far bigger
+ * than any reasonable request or response so this should never affect
+ * day-to-day operation.
+ */
+#define COUNT_HEADER_SIZE(V)                                         \
+do {                                                                 \
+  nread += (uint32_t)(V);                                            \
+  if (UNLIKELY(nread > max_header_size)) {                           \
+    SET_ERRNO(HPE_HEADER_OVERFLOW);                                  \
+    goto error;                                                      \
+  }                                                                  \
+} while (0)
+
+
+#define PROXY_CONNECTION "proxy-connection"
+#define CONNECTION "connection"
+#define CONTENT_LENGTH "content-length"
+#define TRANSFER_ENCODING "transfer-encoding"
+#define UPGRADE "upgrade"
+#define CHUNKED "chunked"
+#define KEEP_ALIVE "keep-alive"
+#define CLOSE "close"
+
+
+static const char *method_strings[] =
+  {
+#define XX(num, name, string) #string,
+  HTTP_METHOD_MAP(XX)
+#undef XX
+  };
+
+
+/* Tokens as defined by rfc 2616. Also lowercases them.
+ *        token       = 1*<any CHAR except CTLs or separators>
+ *     separators     = "(" | ")" | "<" | ">" | "@"
+ *                    | "," | ";" | ":" | "\" | <">
+ *                    | "/" | "[" | "]" | "?" | "="
+ *                    | "{" | "}" | SP | HT
+ */
+static const char tokens[256] = {
+/*   0 nul    1 soh    2 stx    3 etx    4 eot    5 enq    6 ack    7 bel  */
+        0,       0,       0,       0,       0,       0,       0,       0,
+/*   8 bs     9 ht    10 nl    11 vt    12 np    13 cr    14 so    15 si   */
+        0,       0,       0,       0,       0,       0,       0,       0,
+/*  16 dle   17 dc1   18 dc2   19 dc3   20 dc4   21 nak   22 syn   23 etb */
+        0,       0,       0,       0,       0,       0,       0,       0,
+/*  24 can   25 em    26 sub   27 esc   28 fs    29 gs    30 rs    31 us  */
+        0,       0,       0,       0,       0,       0,       0,       0,
+/*  32 sp    33  !    34  "    35  #    36  $    37  %    38  &    39  '  */
+       ' ',     '!',      0,      '#',     '$',     '%',     '&',    '\'',
+/*  40  (    41  )    42  *    43  +    44  ,    45  -    46  .    47  /  */
+        0,       0,      '*',     '+',      0,      '-',     '.',      0,
+/*  48  0    49  1    50  2    51  3    52  4    53  5    54  6    55  7  */
+       '0',     '1',     '2',     '3',     '4',     '5',     '6',     '7',
+/*  56  8    57  9    58  :    59  ;    60  <    61  =    62  >    63  ?  */
+       '8',     '9',      0,       0,       0,       0,       0,       0,
+/*  64  @    65  A    66  B    67  C    68  D    69  E    70  F    71  G  */
+        0,      'a',     'b',     'c',     'd',     'e',     'f',     'g',
+/*  72  H    73  I    74  J    75  K    76  L    77  M    78  N    79  O  */
+       'h',     'i',     'j',     'k',     'l',     'm',     'n',     'o',
+/*  80  P    81  Q    82  R    83  S    84  T    85  U    86  V    87  W  */
+       'p',     'q',     'r',     's',     't',     'u',     'v',     'w',
+/*  88  X    89  Y    90  Z    91  [    92  \    93  ]    94  ^    95  _  */
+       'x',     'y',     'z',      0,       0,       0,      '^',     '_',
+/*  96  `    97  a    98  b    99  c   100  d   101  e   102  f   103  g  */
+       '`',     'a',     'b',     'c',     'd',     'e',     'f',     'g',
+/* 104  h   105  i   106  j   107  k   108  l   109  m   110  n   111  o  */
+       'h',     'i',     'j',     'k',     'l',     'm',     'n',     'o',
+/* 112  p   113  q   114  r   115  s   116  t   117  u   118  v   119  w  */
+       'p',     'q',     'r',     's',     't',     'u',     'v',     'w',
+/* 120  x   121  y   122  z   123  {   124  |   125  }   126  ~   127 del */
+       'x',     'y',     'z',      0,      '|',      0,      '~',       0 };
+
+
+static const int8_t unhex[256] =
+  {-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1
+  ,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1
+  ,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1
+  , 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,-1,-1,-1,-1,-1,-1
+  ,-1,10,11,12,13,14,15,-1,-1,-1,-1,-1,-1,-1,-1,-1
+  ,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1
+  ,-1,10,11,12,13,14,15,-1,-1,-1,-1,-1,-1,-1,-1,-1
+  ,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1
+  };
+
+
+#if HTTP_PARSER_STRICT
+# define T(v) 0
+#else
+# define T(v) v
+#endif
+
+
+static const uint8_t normal_url_char[32] = {
+/*   0 nul    1 soh    2 stx    3 etx    4 eot    5 enq    6 ack    7 bel  */
+        0    |   0    |   0    |   0    |   0    |   0    |   0    |   0,
+/*   8 bs     9 ht    10 nl    11 vt    12 np    13 cr    14 so    15 si   */
+        0    | T(2)   |   0    |   0    | T(16)  |   0    |   0    |   0,
+/*  16 dle   17 dc1   18 dc2   19 dc3   20 dc4   21 nak   22 syn   23 etb */
+        0    |   0    |   0    |   0    |   0    |   0    |   0    |   0,
+/*  24 can   25 em    26 sub   27 esc   28 fs    29 gs    30 rs    31 us  */
+        0    |   0    |   0    |   0    |   0    |   0    |   0    |   0,
+/*  32 sp    33  !    34  "    35  #    36  $    37  %    38  &    39  '  */
+        0    |   2    |   4    |   0    |   16   |   32   |   64   |  128,
+/*  40  (    41  )    42  *    43  +    44  ,    45  -    46  .    47  /  */
+        1    |   2    |   4    |   8    |   16   |   32   |   64   |  128,
+/*  48  0    49  1    50  2    51  3    52  4    53  5    54  6    55  7  */
+        1    |   2    |   4    |   8    |   16   |   32   |   64   |  128,
+/*  56  8    57  9    58  :    59  ;    60  <    61  =    62  >    63  ?  */
+        1    |   2    |   4    |   8    |   16   |   32   |   64   |   0,
+/*  64  @    65  A    66  B    67  C    68  D    69  E    70  F    71  G  */
+        1    |   2    |   4    |   8    |   16   |   32   |   64   |  128,
+/*  72  H    73  I    74  J    75  K    76  L    77  M    78  N    79  O  */
+        1    |   2    |   4    |   8    |   16   |   32   |   64   |  128,
+/*  80  P    81  Q    82  R    83  S    84  T    85  U    86  V    87  W  */
+        1    |   2    |   4    |   8    |   16   |   32   |   64   |  128,
+/*  88  X    89  Y    90  Z    91  [    92  \    93  ]    94  ^    95  _  */
+        1    |   2    |   4    |   8    |   16   |   32   |   64   |  128,
+/*  96  `    97  a    98  b    99  c   100  d   101  e   102  f   103  g  */
+        1    |   2    |   4    |   8    |   16   |   32   |   64   |  128,
+/* 104  h   105  i   106  j   107  k   108  l   109  m   110  n   111  o  */
+        1    |   2    |   4    |   8    |   16   |   32   |   64   |  128,
+/* 112  p   113  q   114  r   115  s   116  t   117  u   118  v   119  w  */
+        1    |   2    |   4    |   8    |   16   |   32   |   64   |  128,
+/* 120  x   121  y   122  z   123  {   124  |   125  }   126  ~   127 del */
+        1    |   2    |   4    |   8    |   16   |   32   |   64   |   0, };
+
+#undef T
+
+enum state
+  { s_dead = 1 /* important that this is > 0 */
+
+  , s_start_req_or_res
+  , s_res_or_resp_H
+  , s_start_res
+  , s_res_H
+  , s_res_HT
+  , s_res_HTT
+  , s_res_HTTP
+  , s_res_http_major
+  , s_res_http_dot
+  , s_res_http_minor
+  , s_res_http_end
+  , s_res_first_status_code
+  , s_res_status_code
+  , s_res_status_start
+  , s_res_status
+  , s_res_line_almost_done
+
+  , s_start_req
+
+  , s_req_method
+  , s_req_spaces_before_url
+  , s_req_schema
+  , s_req_schema_slash
+  , s_req_schema_slash_slash
+  , s_req_server_start
+  , s_req_server
+  , s_req_server_with_at
+  , s_req_path
+  , s_req_query_string_start
+  , s_req_query_string
+  , s_req_fragment_start
+  , s_req_fragment
+  , s_req_http_start
+  , s_req_http_H
+  , s_req_http_HT
+  , s_req_http_HTT
+  , s_req_http_HTTP
+  , s_req_http_I
+  , s_req_http_IC
+  , s_req_http_major
+  , s_req_http_dot
+  , s_req_http_minor
+  , s_req_http_end
+  , s_req_line_almost_done
+
+  , s_header_field_start
+  , s_header_field
+  , s_header_value_discard_ws
+  , s_header_value_discard_ws_almost_done
+  , s_header_value_discard_lws
+  , s_header_value_start
+  , s_header_value
+  , s_header_value_lws
+
+  , s_header_almost_done
+
+  , s_chunk_size_start
+  , s_chunk_size
+  , s_chunk_parameters
+  , s_chunk_size_almost_done
+
+  , s_headers_almost_done
+  , s_headers_done
+
+  /* Important: 's_headers_done' must be the last 'header' state. All
+   * states beyond this must be 'body' states. It is used for overflow
+   * checking. See the PARSING_HEADER() macro.
+   */
+
+  , s_chunk_data
+  , s_chunk_data_almost_done
+  , s_chunk_data_done
+
+  , s_body_identity
+  , s_body_identity_eof
+
+  , s_message_done
+  };
+
+
+#define PARSING_HEADER(state) (state <= s_headers_done)
+
+
+enum header_states
+  { h_general = 0
+  , h_C
+  , h_CO
+  , h_CON
+
+  , h_matching_connection
+  , h_matching_proxy_connection
+  , h_matching_content_length
+  , h_matching_transfer_encoding
+  , h_matching_upgrade
+
+  , h_connection
+  , h_content_length
+  , h_content_length_num
+  , h_content_length_ws
+  , h_transfer_encoding
+  , h_upgrade
+
+  , h_matching_transfer_encoding_chunked
+  , h_matching_connection_token_start
+  , h_matching_connection_keep_alive
+  , h_matching_connection_close
+  , h_matching_connection_upgrade
+  , h_matching_connection_token
+
+  , h_transfer_encoding_chunked
+  , h_connection_keep_alive
+  , h_connection_close
+  , h_connection_upgrade
+  };
+
+enum http_host_state
+  {
+    s_http_host_dead = 1
+  , s_http_userinfo_start
+  , s_http_userinfo
+  , s_http_host_start
+  , s_http_host_v6_start
+  , s_http_host
+  , s_http_host_v6
+  , s_http_host_v6_end
+  , s_http_host_v6_zone_start
+  , s_http_host_v6_zone
+  , s_http_host_port_start
+  , s_http_host_port
+};
+
+/* Macros for character classes; depends on strict-mode  */
+#define CR                  '\r'
+#define LF                  '\n'
+#define LOWER(c)            (unsigned char)(c | 0x20)
+#define IS_ALPHA(c)         (LOWER(c) >= 'a' && LOWER(c) <= 'z')
+#define IS_NUM(c)           ((c) >= '0' && (c) <= '9')
+#define IS_ALPHANUM(c)      (IS_ALPHA(c) || IS_NUM(c))
+#define IS_HEX(c)           (IS_NUM(c) || (LOWER(c) >= 'a' && LOWER(c) <= 'f'))
+#define IS_MARK(c)          ((c) == '-' || (c) == '_' || (c) == '.' || \
+  (c) == '!' || (c) == '~' || (c) == '*' || (c) == '\'' || (c) == '(' || \
+  (c) == ')')
+#define IS_USERINFO_CHAR(c) (IS_ALPHANUM(c) || IS_MARK(c) || (c) == '%' || \
+  (c) == ';' || (c) == ':' || (c) == '&' || (c) == '=' || (c) == '+' || \
+  (c) == '$' || (c) == ',')
+
+#define STRICT_TOKEN(c)     ((c == ' ') ? 0 : tokens[(unsigned char)c])
+
+#if HTTP_PARSER_STRICT
+#define TOKEN(c)            STRICT_TOKEN(c)
+#define IS_URL_CHAR(c)      (BIT_AT(normal_url_char, (unsigned char)c))
+#define IS_HOST_CHAR(c)     (IS_ALPHANUM(c) || (c) == '.' || (c) == '-')
+#else
+#define TOKEN(c)            tokens[(unsigned char)c]
+#define IS_URL_CHAR(c)                                                         \
+  (BIT_AT(normal_url_char, (unsigned char)c) || ((c) & 0x80))
+#define IS_HOST_CHAR(c)                                                        \
+  (IS_ALPHANUM(c) || (c) == '.' || (c) == '-' || (c) == '_')
+#endif
+
+/**
+ * Verify that a char is a valid visible (printable) US-ASCII
+ * character or %x80-FF
+ **/
+#define IS_HEADER_CHAR(ch)                                                     \
+  (ch == CR || ch == LF || ch == 9 || ((unsigned char)ch > 31 && ch != 127))
+
+#define start_state (parser->type == HTTP_REQUEST ? s_start_req : s_start_res)
+
+
+#if HTTP_PARSER_STRICT
+# define STRICT_CHECK(cond)                                          \
+do {                                                                 \
+  if (cond) {                                                        \
+    SET_ERRNO(HPE_STRICT);                                           \
+    goto error;                                                      \
+  }                                                                  \
+} while (0)
+# define NEW_MESSAGE() (http_should_keep_alive(parser) ? start_state : s_dead)
+#else
+# define STRICT_CHECK(cond)
+# define NEW_MESSAGE() start_state
+#endif
+
+
+/* Map errno values to strings for human-readable output */
+#define HTTP_STRERROR_GEN(n, s) { "HPE_" #n, s },
+static struct {
+  const char *name;
+  const char *description;
+} http_strerror_tab[] = {
+  HTTP_ERRNO_MAP(HTTP_STRERROR_GEN)
+};
+#undef HTTP_STRERROR_GEN
+
+int http_message_needs_eof(const http_parser *parser);
+
+/* Our URL parser.
+ *
+ * This is designed to be shared by http_parser_execute() for URL validation,
+ * hence it has a state transition + byte-for-byte interface. In addition, it
+ * is meant to be embedded in http_parser_parse_url(), which does the dirty
+ * work of turning state transitions URL components for its API.
+ *
+ * This function should only be invoked with non-space characters. It is
+ * assumed that the caller cares about (and can detect) the transition between
+ * URL and non-URL states by looking for these.
+ */
+static enum state
+parse_url_char(enum state s, const char ch)
+{
+  if (ch == ' ' || ch == '\r' || ch == '\n') {
+    return s_dead;
+  }
+
+#if HTTP_PARSER_STRICT
+  if (ch == '\t' || ch == '\f') {
+    return s_dead;
+  }
+#endif
+
+  switch (s) {
+    case s_req_spaces_before_url:
+      /* Proxied requests are followed by scheme of an absolute URI (alpha).
+       * All methods except CONNECT are followed by '/' or '*'.
+       */
+
+      if (ch == '/' || ch == '*') {
+        return s_req_path;
+      }
+
+      if (IS_ALPHA(ch)) {
+        return s_req_schema;
+      }
+
+      break;
+
+    case s_req_schema:
+      if (IS_ALPHA(ch)) {
+        return s;
+      }
+
+      if (ch == ':') {
+        return s_req_schema_slash;
+      }
+
+      break;
+
+    case s_req_schema_slash:
+      if (ch == '/') {
+        return s_req_schema_slash_slash;
+      }
+
+      break;
+
+    case s_req_schema_slash_slash:
+      if (ch == '/') {
+        return s_req_server_start;
+      }
+
+      break;
+
+    case s_req_server_with_at:
+      if (ch == '@') {
+        return s_dead;
+      }
+
+    /* fall through */
+    case s_req_server_start:
+    case s_req_server:
+      if (ch == '/') {
+        return s_req_path;
+      }
+
+      if (ch == '?') {
+        return s_req_query_string_start;
+      }
+
+      if (ch == '@') {
+        return s_req_server_with_at;
+      }
+
+      if (IS_USERINFO_CHAR(ch) || ch == '[' || ch == ']') {
+        return s_req_server;
+      }
+
+      break;
+
+    case s_req_path:
+      if (IS_URL_CHAR(ch)) {
+        return s;
+      }
+
+      switch (ch) {
+        case '?':
+          return s_req_query_string_start;
+
+        case '#':
+          return s_req_fragment_start;
+      }
+
+      break;
+
+    case s_req_query_string_start:
+    case s_req_query_string:
+      if (IS_URL_CHAR(ch)) {
+        return s_req_query_string;
+      }
+
+      switch (ch) {
+        case '?':
+          /* allow extra '?' in query string */
+          return s_req_query_string;
+
+        case '#':
+          return s_req_fragment_start;
+      }
+
+      break;
+
+    case s_req_fragment_start:
+      if (IS_URL_CHAR(ch)) {
+        return s_req_fragment;
+      }
+
+      switch (ch) {
+        case '?':
+          return s_req_fragment;
+
+        case '#':
+          return s;
+      }
+
+      break;
+
+    case s_req_fragment:
+      if (IS_URL_CHAR(ch)) {
+        return s;
+      }
+
+      switch (ch) {
+        case '?':
+        case '#':
+          return s;
+      }
+
+      break;
+
+    default:
+      break;
+  }
+
+  /* We should never fall out of the switch above unless there's an error */
+  return s_dead;
+}
+
+size_t http_parser_execute (http_parser *parser,
+                            const http_parser_settings *settings,
+                            const char *data,
+                            size_t len)
+{
+  char c, ch;
+  int8_t unhex_val;
+  const char *p = data;
+  const char *header_field_mark = 0;
+  const char *header_value_mark = 0;
+  const char *url_mark = 0;
+  const char *body_mark = 0;
+  const char *status_mark = 0;
+  enum state p_state = (enum state) parser->state;
+  const unsigned int lenient = parser->lenient_http_headers;
+  uint32_t nread = parser->nread;
+
+  /* We're in an error state. Don't bother doing anything. */
+  if (HTTP_PARSER_ERRNO(parser) != HPE_OK) {
+    return 0;
+  }
+
+  if (len == 0) {
+    switch (CURRENT_STATE()) {
+      case s_body_identity_eof:
+        /* Use of CALLBACK_NOTIFY() here would erroneously return 1 byte read if
+         * we got paused.
+         */
+        CALLBACK_NOTIFY_NOADVANCE(message_complete);
+        return 0;
+
+      case s_dead:
+      case s_start_req_or_res:
+      case s_start_res:
+      case s_start_req:
+        return 0;
+
+      default:
+        SET_ERRNO(HPE_INVALID_EOF_STATE);
+        return 1;
+    }
+  }
+
+
+  if (CURRENT_STATE() == s_header_field)
+    header_field_mark = data;
+  if (CURRENT_STATE() == s_header_value)
+    header_value_mark = data;
+  switch (CURRENT_STATE()) {
+  case s_req_path:
+  case s_req_schema:
+  case s_req_schema_slash:
+  case s_req_schema_slash_slash:
+  case s_req_server_start:
+  case s_req_server:
+  case s_req_server_with_at:
+  case s_req_query_string_start:
+  case s_req_query_string:
+  case s_req_fragment_start:
+  case s_req_fragment:
+    url_mark = data;
+    break;
+  case s_res_status:
+    status_mark = data;
+    break;
+  default:
+    break;
+  }
+
+  for (p=data; p != data + len; p++) {
+    ch = *p;
+
+    if (PARSING_HEADER(CURRENT_STATE()))
+      COUNT_HEADER_SIZE(1);
+
+reexecute:
+    switch (CURRENT_STATE()) {
+
+      case s_dead:
+        /* this state is used after a 'Connection: close' message
+         * the parser will error out if it reads another message
+         */
+        if (LIKELY(ch == CR || ch == LF))
+          break;
+
+        SET_ERRNO(HPE_CLOSED_CONNECTION);
+        goto error;
+
+      case s_start_req_or_res:
+      {
+        if (ch == CR || ch == LF)
+          break;
+        parser->flags = 0;
+        parser->content_length = ULLONG_MAX;
+
+        if (ch == 'H') {
+          UPDATE_STATE(s_res_or_resp_H);
+
+          CALLBACK_NOTIFY(message_begin);
+        } else {
+          parser->type = HTTP_REQUEST;
+          UPDATE_STATE(s_start_req);
+          REEXECUTE();
+        }
+
+        break;
+      }
+
+      case s_res_or_resp_H:
+        if (ch == 'T') {
+          parser->type = HTTP_RESPONSE;
+          UPDATE_STATE(s_res_HT);
+        } else {
+          if (UNLIKELY(ch != 'E')) {
+            SET_ERRNO(HPE_INVALID_CONSTANT);
+            goto error;
+          }
+
+          parser->type = HTTP_REQUEST;
+          parser->method = HTTP_HEAD;
+          parser->index = 2;
+          UPDATE_STATE(s_req_method);
+        }
+        break;
+
+      case s_start_res:
+      {
+        if (ch == CR || ch == LF)
+          break;
+        parser->flags = 0;
+        parser->content_length = ULLONG_MAX;
+
+        if (ch == 'H') {
+          UPDATE_STATE(s_res_H);
+        } else {
+          SET_ERRNO(HPE_INVALID_CONSTANT);
+          goto error;
+        }
+
+        CALLBACK_NOTIFY(message_begin);
+        break;
+      }
+
+      case s_res_H:
+        STRICT_CHECK(ch != 'T');
+        UPDATE_STATE(s_res_HT);
+        break;
+
+      case s_res_HT:
+        STRICT_CHECK(ch != 'T');
+        UPDATE_STATE(s_res_HTT);
+        break;
+
+      case s_res_HTT:
+        STRICT_CHECK(ch != 'P');
+        UPDATE_STATE(s_res_HTTP);
+        break;
+
+      case s_res_HTTP:
+        STRICT_CHECK(ch != '/');
+        UPDATE_STATE(s_res_http_major);
+        break;
+
+      case s_res_http_major:
+        if (UNLIKELY(!IS_NUM(ch))) {
+          SET_ERRNO(HPE_INVALID_VERSION);
+          goto error;
+        }
+
+        parser->http_major = ch - '0';
+        UPDATE_STATE(s_res_http_dot);
+        break;
+
+      case s_res_http_dot:
+      {
+        if (UNLIKELY(ch != '.')) {
+          SET_ERRNO(HPE_INVALID_VERSION);
+          goto error;
+        }
+
+        UPDATE_STATE(s_res_http_minor);
+        break;
+      }
+
+      case s_res_http_minor:
+        if (UNLIKELY(!IS_NUM(ch))) {
+          SET_ERRNO(HPE_INVALID_VERSION);
+          goto error;
+        }
+
+        parser->http_minor = ch - '0';
+        UPDATE_STATE(s_res_http_end);
+        break;
+
+      case s_res_http_end:
+      {
+        if (UNLIKELY(ch != ' ')) {
+          SET_ERRNO(HPE_INVALID_VERSION);
+          goto error;
+        }
+
+        UPDATE_STATE(s_res_first_status_code);
+        break;
+      }
+
+      case s_res_first_status_code:
+      {
+        if (!IS_NUM(ch)) {
+          if (ch == ' ') {
+            break;
+          }
+
+          SET_ERRNO(HPE_INVALID_STATUS);
+          goto error;
+        }
+        parser->status_code = ch - '0';
+        UPDATE_STATE(s_res_status_code);
+        break;
+      }
+
+      case s_res_status_code:
+      {
+        if (!IS_NUM(ch)) {
+          switch (ch) {
+            case ' ':
+              UPDATE_STATE(s_res_status_start);
+              break;
+            case CR:
+            case LF:
+              UPDATE_STATE(s_res_status_start);
+              REEXECUTE();
+              break;
+            default:
+              SET_ERRNO(HPE_INVALID_STATUS);
+              goto error;
+          }
+          break;
+        }
+
+        parser->status_code *= 10;
+        parser->status_code += ch - '0';
+
+        if (UNLIKELY(parser->status_code > 999)) {
+          SET_ERRNO(HPE_INVALID_STATUS);
+          goto error;
+        }
+
+        break;
+      }
+
+      case s_res_status_start:
+      {
+        MARK(status);
+        UPDATE_STATE(s_res_status);
+        parser->index = 0;
+
+        if (ch == CR || ch == LF)
+          REEXECUTE();
+
+        break;
+      }
+
+      case s_res_status:
+        if (ch == CR) {
+          UPDATE_STATE(s_res_line_almost_done);
+          CALLBACK_DATA(status);
+          break;
+        }
+
+        if (ch == LF) {
+          UPDATE_STATE(s_header_field_start);
+          CALLBACK_DATA(status);
+          break;
+        }
+
+        break;
+
+      case s_res_line_almost_done:
+        STRICT_CHECK(ch != LF);
+        UPDATE_STATE(s_header_field_start);
+        break;
+
+      case s_start_req:
+      {
+        if (ch == CR || ch == LF)
+          break;
+        parser->flags = 0;
+        parser->content_length = ULLONG_MAX;
+
+        if (UNLIKELY(!IS_ALPHA(ch))) {
+          SET_ERRNO(HPE_INVALID_METHOD);
+          goto error;
+        }
+
+        parser->method = (enum http_method) 0;
+        parser->index = 1;
+        switch (ch) {
+          case 'A': parser->method = HTTP_ACL; break;
+          case 'B': parser->method = HTTP_BIND; break;
+          case 'C': parser->method = HTTP_CONNECT; /* or COPY, CHECKOUT */ break;
+          case 'D': parser->method = HTTP_DELETE; break;
+          case 'G': parser->method = HTTP_GET; break;
+          case 'H': parser->method = HTTP_HEAD; break;
+          case 'L': parser->method = HTTP_LOCK; /* or LINK */ break;
+          case 'M': parser->method = HTTP_MKCOL; /* or MOVE, MKACTIVITY, MERGE, M-SEARCH, MKCALENDAR */ break;
+          case 'N': parser->method = HTTP_NOTIFY; break;
+          case 'O': parser->method = HTTP_OPTIONS; break;
+          case 'P': parser->method = HTTP_POST;
+            /* or PROPFIND|PROPPATCH|PUT|PATCH|PURGE */
+            break;
+          case 'R': parser->method = HTTP_REPORT; /* or REBIND */ break;
+          case 'S': parser->method = HTTP_SUBSCRIBE; /* or SEARCH, SOURCE */ break;
+          case 'T': parser->method = HTTP_TRACE; break;
+          case 'U': parser->method = HTTP_UNLOCK; /* or UNSUBSCRIBE, UNBIND, UNLINK */ break;
+          default:
+            SET_ERRNO(HPE_INVALID_METHOD);
+            goto error;
+        }
+        UPDATE_STATE(s_req_method);
+
+        CALLBACK_NOTIFY(message_begin);
+
+        break;
+      }
+
+      case s_req_method:
+      {
+        const char *matcher;
+        if (UNLIKELY(ch == '\0')) {
+          SET_ERRNO(HPE_INVALID_METHOD);
+          goto error;
+        }
+
+        matcher = method_strings[parser->method];
+        if (ch == ' ' && matcher[parser->index] == '\0') {
+          UPDATE_STATE(s_req_spaces_before_url);
+        } else if (ch == matcher[parser->index]) {
+          ; /* nada */
+        } else if ((ch >= 'A' && ch <= 'Z') || ch == '-') {
+
+          switch (parser->method << 16 | parser->index << 8 | ch) {
+#define XX(meth, pos, ch, new_meth) \
+            case (HTTP_##meth << 16 | pos << 8 | ch): \
+              parser->method = HTTP_##new_meth; break;
+
+            XX(POST,      1, 'U', PUT)
+            XX(POST,      1, 'A', PATCH)
+            XX(POST,      1, 'R', PROPFIND)
+            XX(PUT,       2, 'R', PURGE)
+            XX(CONNECT,   1, 'H', CHECKOUT)
+            XX(CONNECT,   2, 'P', COPY)
+            XX(MKCOL,     1, 'O', MOVE)
+            XX(MKCOL,     1, 'E', MERGE)
+            XX(MKCOL,     1, '-', MSEARCH)
+            XX(MKCOL,     2, 'A', MKACTIVITY)
+            XX(MKCOL,     3, 'A', MKCALENDAR)
+            XX(SUBSCRIBE, 1, 'E', SEARCH)
+            XX(SUBSCRIBE, 1, 'O', SOURCE)
+            XX(REPORT,    2, 'B', REBIND)
+            XX(PROPFIND,  4, 'P', PROPPATCH)
+            XX(LOCK,      1, 'I', LINK)
+            XX(UNLOCK,    2, 'S', UNSUBSCRIBE)
+            XX(UNLOCK,    2, 'B', UNBIND)
+            XX(UNLOCK,    3, 'I', UNLINK)
+#undef XX
+            default:
+              SET_ERRNO(HPE_INVALID_METHOD);
+              goto error;
+          }
+        } else {
+          SET_ERRNO(HPE_INVALID_METHOD);
+          goto error;
+        }
+
+        ++parser->index;
+        break;
+      }
+
+      case s_req_spaces_before_url:
+      {
+        if (ch == ' ') break;
+
+        MARK(url);
+        if (parser->method == HTTP_CONNECT) {
+          UPDATE_STATE(s_req_server_start);
+        }
+
+        UPDATE_STATE(parse_url_char(CURRENT_STATE(), ch));
+        if (UNLIKELY(CURRENT_STATE() == s_dead)) {
+          SET_ERRNO(HPE_INVALID_URL);
+          goto error;
+        }
+
+        break;
+      }
+
+      case s_req_schema:
+      case s_req_schema_slash:
+      case s_req_schema_slash_slash:
+      case s_req_server_start:
+      {
+        switch (ch) {
+          /* No whitespace allowed here */
+          case ' ':
+          case CR:
+          case LF:
+            SET_ERRNO(HPE_INVALID_URL);
+            goto error;
+          default:
+            UPDATE_STATE(parse_url_char(CURRENT_STATE(), ch));
+            if (UNLIKELY(CURRENT_STATE() == s_dead)) {
+              SET_ERRNO(HPE_INVALID_URL);
+              goto error;
+            }
+        }
+
+        break;
+      }
+
+      case s_req_server:
+      case s_req_server_with_at:
+      case s_req_path:
+      case s_req_query_string_start:
+      case s_req_query_string:
+      case s_req_fragment_start:
+      case s_req_fragment:
+      {
+        switch (ch) {
+          case ' ':
+            UPDATE_STATE(s_req_http_start);
+            CALLBACK_DATA(url);
+            break;
+          case CR:
+          case LF:
+            parser->http_major = 0;
+            parser->http_minor = 9;
+            UPDATE_STATE((ch == CR) ?
+              s_req_line_almost_done :
+              s_header_field_start);
+            CALLBACK_DATA(url);
+            break;
+          default:
+            UPDATE_STATE(parse_url_char(CURRENT_STATE(), ch));
+            if (UNLIKELY(CURRENT_STATE() == s_dead)) {
+              SET_ERRNO(HPE_INVALID_URL);
+              goto error;
+            }
+        }
+        break;
+      }
+
+      case s_req_http_start:
+        switch (ch) {
+          case ' ':
+            break;
+          case 'H':
+            UPDATE_STATE(s_req_http_H);
+            break;
+          case 'I':
+            if (parser->method == HTTP_SOURCE) {
+              UPDATE_STATE(s_req_http_I);
+              break;
+            }
+            /* fall through */
+          default:
+            SET_ERRNO(HPE_INVALID_CONSTANT);
+            goto error;
+        }
+        break;
+
+      case s_req_http_H:
+        STRICT_CHECK(ch != 'T');
+        UPDATE_STATE(s_req_http_HT);
+        break;
+
+      case s_req_http_HT:
+        STRICT_CHECK(ch != 'T');
+        UPDATE_STATE(s_req_http_HTT);
+        break;
+
+      case s_req_http_HTT:
+        STRICT_CHECK(ch != 'P');
+        UPDATE_STATE(s_req_http_HTTP);
+        break;
+
+      case s_req_http_I:
+        STRICT_CHECK(ch != 'C');
+        UPDATE_STATE(s_req_http_IC);
+        break;
+
+      case s_req_http_IC:
+        STRICT_CHECK(ch != 'E');
+        UPDATE_STATE(s_req_http_HTTP);  /* Treat "ICE" as "HTTP". */
+        break;
+
+      case s_req_http_HTTP:
+        STRICT_CHECK(ch != '/');
+        UPDATE_STATE(s_req_http_major);
+        break;
+
+      case s_req_http_major:
+        if (UNLIKELY(!IS_NUM(ch))) {
+          SET_ERRNO(HPE_INVALID_VERSION);
+          goto error;
+        }
+
+        parser->http_major = ch - '0';
+        UPDATE_STATE(s_req_http_dot);
+        break;
+
+      case s_req_http_dot:
+      {
+        if (UNLIKELY(ch != '.')) {
+          SET_ERRNO(HPE_INVALID_VERSION);
+          goto error;
+        }
+
+        UPDATE_STATE(s_req_http_minor);
+        break;
+      }
+
+      case s_req_http_minor:
+        if (UNLIKELY(!IS_NUM(ch))) {
+          SET_ERRNO(HPE_INVALID_VERSION);
+          goto error;
+        }
+
+        parser->http_minor = ch - '0';
+        UPDATE_STATE(s_req_http_end);
+        break;
+
+      case s_req_http_end:
+      {
+        if (ch == CR) {
+          UPDATE_STATE(s_req_line_almost_done);
+          break;
+        }
+
+        if (ch == LF) {
+          UPDATE_STATE(s_header_field_start);
+          break;
+        }
+
+        SET_ERRNO(HPE_INVALID_VERSION);
+        goto error;
+        break;
+      }
+
+      /* end of request line */
+      case s_req_line_almost_done:
+      {
+        if (UNLIKELY(ch != LF)) {
+          SET_ERRNO(HPE_LF_EXPECTED);
+          goto error;
+        }
+
+        UPDATE_STATE(s_header_field_start);
+        break;
+      }
+
+      case s_header_field_start:
+      {
+        if (ch == CR) {
+          UPDATE_STATE(s_headers_almost_done);
+          break;
+        }
+
+        if (ch == LF) {
+          /* they might be just sending \n instead of \r\n so this would be
+           * the second \n to denote the end of headers*/
+          UPDATE_STATE(s_headers_almost_done);
+          REEXECUTE();
+        }
+
+        c = TOKEN(ch);
+
+        if (UNLIKELY(!c)) {
+          SET_ERRNO(HPE_INVALID_HEADER_TOKEN);
+          goto error;
+        }
+
+        MARK(header_field);
+
+        parser->index = 0;
+        UPDATE_STATE(s_header_field);
+
+        switch (c) {
+          case 'c':
+            parser->header_state = h_C;
+            break;
+
+          case 'p':
+            parser->header_state = h_matching_proxy_connection;
+            break;
+
+          case 't':
+            parser->header_state = h_matching_transfer_encoding;
+            break;
+
+          case 'u':
+            parser->header_state = h_matching_upgrade;
+            break;
+
+          default:
+            parser->header_state = h_general;
+            break;
+        }
+        break;
+      }
+
+      case s_header_field:
+      {
+        const char* start = p;
+        for (; p != data + len; p++) {
+          ch = *p;
+          c = TOKEN(ch);
+
+          if (!c)
+            break;
+
+          switch (parser->header_state) {
+            case h_general: {
+              size_t left = data + len - p;
+              const char* pe = p + MIN(left, max_header_size);
+              while (p+1 < pe && TOKEN(p[1])) {
+                p++;
+              }
+              break;
+            }
+
+            case h_C:
+              parser->index++;
+              parser->header_state = (c == 'o' ? h_CO : h_general);
+              break;
+
+            case h_CO:
+              parser->index++;
+              parser->header_state = (c == 'n' ? h_CON : h_general);
+              break;
+
+            case h_CON:
+              parser->index++;
+              switch (c) {
+                case 'n':
+                  parser->header_state = h_matching_connection;
+                  break;
+                case 't':
+                  parser->header_state = h_matching_content_length;
+                  break;
+                default:
+                  parser->header_state = h_general;
+                  break;
+              }
+              break;
+
+            /* connection */
+
+            case h_matching_connection:
+              parser->index++;
+              if (parser->index > sizeof(CONNECTION)-1
+                  || c != CONNECTION[parser->index]) {
+                parser->header_state = h_general;
+              } else if (parser->index == sizeof(CONNECTION)-2) {
+                parser->header_state = h_connection;
+              }
+              break;
+
+            /* proxy-connection */
+
+            case h_matching_proxy_connection:
+              parser->index++;
+              if (parser->index > sizeof(PROXY_CONNECTION)-1
+                  || c != PROXY_CONNECTION[parser->index]) {
+                parser->header_state = h_general;
+              } else if (parser->index == sizeof(PROXY_CONNECTION)-2) {
+                parser->header_state = h_connection;
+              }
+              break;
+
+            /* content-length */
+
+            case h_matching_content_length:
+              parser->index++;
+              if (parser->index > sizeof(CONTENT_LENGTH)-1
+                  || c != CONTENT_LENGTH[parser->index]) {
+                parser->header_state = h_general;
+              } else if (parser->index == sizeof(CONTENT_LENGTH)-2) {
+                parser->header_state = h_content_length;
+              }
+              break;
+
+            /* transfer-encoding */
+
+            case h_matching_transfer_encoding:
+              parser->index++;
+              if (parser->index > sizeof(TRANSFER_ENCODING)-1
+                  || c != TRANSFER_ENCODING[parser->index]) {
+                parser->header_state = h_general;
+              } else if (parser->index == sizeof(TRANSFER_ENCODING)-2) {
+                parser->header_state = h_transfer_encoding;
+              }
+              break;
+
+            /* upgrade */
+
+            case h_matching_upgrade:
+              parser->index++;
+              if (parser->index > sizeof(UPGRADE)-1
+                  || c != UPGRADE[parser->index]) {
+                parser->header_state = h_general;
+              } else if (parser->index == sizeof(UPGRADE)-2) {
+                parser->header_state = h_upgrade;
+              }
+              break;
+
+            case h_connection:
+            case h_content_length:
+            case h_transfer_encoding:
+            case h_upgrade:
+              if (ch != ' ') parser->header_state = h_general;
+              break;
+
+            default:
+              assert(0 && "Unknown header_state");
+              break;
+          }
+        }
+
+        if (p == data + len) {
+          --p;
+          COUNT_HEADER_SIZE(p - start);
+          break;
+        }
+
+        COUNT_HEADER_SIZE(p - start);
+
+        if (ch == ':') {
+          UPDATE_STATE(s_header_value_discard_ws);
+          CALLBACK_DATA(header_field);
+          break;
+        }
+
+        SET_ERRNO(HPE_INVALID_HEADER_TOKEN);
+        goto error;
+      }
+
+      case s_header_value_discard_ws:
+        if (ch == ' ' || ch == '\t') break;
+
+        if (ch == CR) {
+          UPDATE_STATE(s_header_value_discard_ws_almost_done);
+          break;
+        }
+
+        if (ch == LF) {
+          UPDATE_STATE(s_header_value_discard_lws);
+          break;
+        }
+
+        /* fall through */
+
+      case s_header_value_start:
+      {
+        MARK(header_value);
+
+        UPDATE_STATE(s_header_value);
+        parser->index = 0;
+
+        c = LOWER(ch);
+
+        switch (parser->header_state) {
+          case h_upgrade:
+            parser->flags |= F_UPGRADE;
+            parser->header_state = h_general;
+            break;
+
+          case h_transfer_encoding:
+            /* looking for 'Transfer-Encoding: chunked' */
+            if ('c' == c) {
+              parser->header_state = h_matching_transfer_encoding_chunked;
+            } else {
+              parser->header_state = h_general;
+            }
+            break;
+
+          case h_content_length:
+            if (UNLIKELY(!IS_NUM(ch))) {
+              SET_ERRNO(HPE_INVALID_CONTENT_LENGTH);
+              goto error;
+            }
+
+            if (parser->flags & F_CONTENTLENGTH) {
+              SET_ERRNO(HPE_UNEXPECTED_CONTENT_LENGTH);
+              goto error;
+            }
+
+            parser->flags |= F_CONTENTLENGTH;
+            parser->content_length = ch - '0';
+            parser->header_state = h_content_length_num;
+            break;
+
+          /* when obsolete line folding is encountered for content length
+           * continue to the s_header_value state */
+          case h_content_length_ws:
+            break;
+
+          case h_connection:
+            /* looking for 'Connection: keep-alive' */
+            if (c == 'k') {
+              parser->header_state = h_matching_connection_keep_alive;
+            /* looking for 'Connection: close' */
+            } else if (c == 'c') {
+              parser->header_state = h_matching_connection_close;
+            } else if (c == 'u') {
+              parser->header_state = h_matching_connection_upgrade;
+            } else {
+              parser->header_state = h_matching_connection_token;
+            }
+            break;
+
+          /* Multi-value `Connection` header */
+          case h_matching_connection_token_start:
+            break;
+
+          default:
+            parser->header_state = h_general;
+            break;
+        }
+        break;
+      }
+
+      case s_header_value:
+      {
+        const char* start = p;
+        enum header_states h_state = (enum header_states) parser->header_state;
+        for (; p != data + len; p++) {
+          ch = *p;
+          if (ch == CR) {
+            UPDATE_STATE(s_header_almost_done);
+            parser->header_state = h_state;
+            CALLBACK_DATA(header_value);
+            break;
+          }
+
+          if (ch == LF) {
+            UPDATE_STATE(s_header_almost_done);
+            COUNT_HEADER_SIZE(p - start);
+            parser->header_state = h_state;
+            CALLBACK_DATA_NOADVANCE(header_value);
+            REEXECUTE();
+          }
+
+          if (!lenient && !IS_HEADER_CHAR(ch)) {
+            SET_ERRNO(HPE_INVALID_HEADER_TOKEN);
+            goto error;
+          }
+
+          c = LOWER(ch);
+
+          switch (h_state) {
+            case h_general:
+              {
+                size_t left = data + len - p;
+                const char* pe = p + MIN(left, max_header_size);
+
+                for (; p != pe; p++) {
+                  ch = *p;
+                  if (ch == CR || ch == LF) {
+                    --p;
+                    break;
+                  }
+                  if (!lenient && !IS_HEADER_CHAR(ch)) {
+                    SET_ERRNO(HPE_INVALID_HEADER_TOKEN);
+                    goto error;
+                  }
+                }
+                if (p == data + len)
+                  --p;
+                break;
+              }
+
+            case h_connection:
+            case h_transfer_encoding:
+              assert(0 && "Shouldn't get here.");
+              break;
+
+            case h_content_length:
+              if (ch == ' ') break;
+              h_state = h_content_length_num;
+              /* fall through */
+
+            case h_content_length_num:
+            {
+              uint64_t t;
+
+              if (ch == ' ') {
+                h_state = h_content_length_ws;
+                break;
+              }
+
+              if (UNLIKELY(!IS_NUM(ch))) {
+                SET_ERRNO(HPE_INVALID_CONTENT_LENGTH);
+                parser->header_state = h_state;
+                goto error;
+              }
+
+              t = parser->content_length;
+              t *= 10;
+              t += ch - '0';
+
+              /* Overflow? Test against a conservative limit for simplicity. */
+              if (UNLIKELY((ULLONG_MAX - 10) / 10 < parser->content_length)) {
+                SET_ERRNO(HPE_INVALID_CONTENT_LENGTH);
+                parser->header_state = h_state;
+                goto error;
+              }
+
+              parser->content_length = t;
+              break;
+            }
+
+            case h_content_length_ws:
+              if (ch == ' ') break;
+              SET_ERRNO(HPE_INVALID_CONTENT_LENGTH);
+              parser->header_state = h_state;
+              goto error;
+
+            /* Transfer-Encoding: chunked */
+            case h_matching_transfer_encoding_chunked:
+              parser->index++;
+              if (parser->index > sizeof(CHUNKED)-1
+                  || c != CHUNKED[parser->index]) {
+                h_state = h_general;
+              } else if (parser->index == sizeof(CHUNKED)-2) {
+                h_state = h_transfer_encoding_chunked;
+              }
+              break;
+
+            case h_matching_connection_token_start:
+              /* looking for 'Connection: keep-alive' */
+              if (c == 'k') {
+                h_state = h_matching_connection_keep_alive;
+              /* looking for 'Connection: close' */
+              } else if (c == 'c') {
+                h_state = h_matching_connection_close;
+              } else if (c == 'u') {
+                h_state = h_matching_connection_upgrade;
+              } else if (STRICT_TOKEN(c)) {
+                h_state = h_matching_connection_token;
+              } else if (c == ' ' || c == '\t') {
+                /* Skip lws */
+              } else {
+                h_state = h_general;
+              }
+              break;
+
+            /* looking for 'Connection: keep-alive' */
+            case h_matching_connection_keep_alive:
+              parser->index++;
+              if (parser->index > sizeof(KEEP_ALIVE)-1
+                  || c != KEEP_ALIVE[parser->index]) {
+                h_state = h_matching_connection_token;
+              } else if (parser->index == sizeof(KEEP_ALIVE)-2) {
+                h_state = h_connection_keep_alive;
+              }
+              break;
+
+            /* looking for 'Connection: close' */
+            case h_matching_connection_close:
+              parser->index++;
+              if (parser->index > sizeof(CLOSE)-1 || c != CLOSE[parser->index]) {
+                h_state = h_matching_connection_token;
+              } else if (parser->index == sizeof(CLOSE)-2) {
+                h_state = h_connection_close;
+              }
+              break;
+
+            /* looking for 'Connection: upgrade' */
+            case h_matching_connection_upgrade:
+              parser->index++;
+              if (parser->index > sizeof(UPGRADE) - 1 ||
+                  c != UPGRADE[parser->index]) {
+                h_state = h_matching_connection_token;
+              } else if (parser->index == sizeof(UPGRADE)-2) {
+                h_state = h_connection_upgrade;
+              }
+              break;
+
+            case h_matching_connection_token:
+              if (ch == ',') {
+                h_state = h_matching_connection_token_start;
+                parser->index = 0;
+              }
+              break;
+
+            case h_transfer_encoding_chunked:
+              if (ch != ' ') h_state = h_general;
+              break;
+
+            case h_connection_keep_alive:
+            case h_connection_close:
+            case h_connection_upgrade:
+              if (ch == ',') {
+                if (h_state == h_connection_keep_alive) {
+                  parser->flags |= F_CONNECTION_KEEP_ALIVE;
+                } else if (h_state == h_connection_close) {
+                  parser->flags |= F_CONNECTION_CLOSE;
+                } else if (h_state == h_connection_upgrade) {
+                  parser->flags |= F_CONNECTION_UPGRADE;
+                }
+                h_state = h_matching_connection_token_start;
+                parser->index = 0;
+              } else if (ch != ' ') {
+                h_state = h_matching_connection_token;
+              }
+              break;
+
+            default:
+              UPDATE_STATE(s_header_value);
+              h_state = h_general;
+              break;
+          }
+        }
+        parser->header_state = h_state;
+
+        if (p == data + len)
+          --p;
+
+        COUNT_HEADER_SIZE(p - start);
+        break;
+      }
+
+      case s_header_almost_done:
+      {
+        if (UNLIKELY(ch != LF)) {
+          SET_ERRNO(HPE_LF_EXPECTED);
+          goto error;
+        }
+
+        UPDATE_STATE(s_header_value_lws);
+        break;
+      }
+
+      case s_header_value_lws:
+      {
+        if (ch == ' ' || ch == '\t') {
+          if (parser->header_state == h_content_length_num) {
+              /* treat obsolete line folding as space */
+              parser->header_state = h_content_length_ws;
+          }
+          UPDATE_STATE(s_header_value_start);
+          REEXECUTE();
+        }
+
+        /* finished the header */
+        switch (parser->header_state) {
+          case h_connection_keep_alive:
+            parser->flags |= F_CONNECTION_KEEP_ALIVE;
+            break;
+          case h_connection_close:
+            parser->flags |= F_CONNECTION_CLOSE;
+            break;
+          case h_transfer_encoding_chunked:
+            parser->flags |= F_CHUNKED;
+            break;
+          case h_connection_upgrade:
+            parser->flags |= F_CONNECTION_UPGRADE;
+            break;
+          default:
+            break;
+        }
+
+        UPDATE_STATE(s_header_field_start);
+        REEXECUTE();
+      }
+
+      case s_header_value_discard_ws_almost_done:
+      {
+        STRICT_CHECK(ch != LF);
+        UPDATE_STATE(s_header_value_discard_lws);
+        break;
+      }
+
+      case s_header_value_discard_lws:
+      {
+        if (ch == ' ' || ch == '\t') {
+          UPDATE_STATE(s_header_value_discard_ws);
+          break;
+        } else {
+          switch (parser->header_state) {
+            case h_connection_keep_alive:
+              parser->flags |= F_CONNECTION_KEEP_ALIVE;
+              break;
+            case h_connection_close:
+              parser->flags |= F_CONNECTION_CLOSE;
+              break;
+            case h_connection_upgrade:
+              parser->flags |= F_CONNECTION_UPGRADE;
+              break;
+            case h_transfer_encoding_chunked:
+              parser->flags |= F_CHUNKED;
+              break;
+            case h_content_length:
+              /* do not allow empty content length */
+              SET_ERRNO(HPE_INVALID_CONTENT_LENGTH);
+              goto error;
+              break;
+            default:
+              break;
+          }
+
+          /* header value was empty */
+          MARK(header_value);
+          UPDATE_STATE(s_header_field_start);
+          CALLBACK_DATA_NOADVANCE(header_value);
+          REEXECUTE();
+        }
+      }
+
+      case s_headers_almost_done:
+      {
+        STRICT_CHECK(ch != LF);
+
+        if (parser->flags & F_TRAILING) {
+          /* End of a chunked request */
+          UPDATE_STATE(s_message_done);
+          CALLBACK_NOTIFY_NOADVANCE(chunk_complete);
+          REEXECUTE();
+        }
+
+        /* Cannot use chunked encoding and a content-length header together
+           per the HTTP specification. */
+        if ((parser->flags & F_CHUNKED) &&
+            (parser->flags & F_CONTENTLENGTH)) {
+          SET_ERRNO(HPE_UNEXPECTED_CONTENT_LENGTH);
+          goto error;
+        }
+
+        UPDATE_STATE(s_headers_done);
+
+        /* Set this here so that on_headers_complete() callbacks can see it */
+        if ((parser->flags & F_UPGRADE) &&
+            (parser->flags & F_CONNECTION_UPGRADE)) {
+          /* For responses, "Upgrade: foo" and "Connection: upgrade" are
+           * mandatory only when it is a 101 Switching Protocols response,
+           * otherwise it is purely informational, to announce support.
+           */
+          parser->upgrade =
+              (parser->type == HTTP_REQUEST || parser->status_code == 101);
+        } else {
+          parser->upgrade = (parser->method == HTTP_CONNECT);
+        }
+
+        /* Here we call the headers_complete callback. This is somewhat
+         * different than other callbacks because if the user returns 1, we
+         * will interpret that as saying that this message has no body. This
+         * is needed for the annoying case of recieving a response to a HEAD
+         * request.
+         *
+         * We'd like to use CALLBACK_NOTIFY_NOADVANCE() here but we cannot, so
+         * we have to simulate it by handling a change in errno below.
+         */
+        if (settings->on_headers_complete) {
+          switch (settings->on_headers_complete(parser)) {
+            case 0:
+              break;
+
+            case 2:
+              parser->upgrade = 1;
+
+              /* fall through */
+            case 1:
+              parser->flags |= F_SKIPBODY;
+              break;
+
+            default:
+              SET_ERRNO(HPE_CB_headers_complete);
+              RETURN(p - data); /* Error */
+          }
+        }
+
+        if (HTTP_PARSER_ERRNO(parser) != HPE_OK) {
+          RETURN(p - data);
+        }
+
+        REEXECUTE();
+      }
+
+      case s_headers_done:
+      {
+        int hasBody;
+        STRICT_CHECK(ch != LF);
+
+        parser->nread = 0;
+        nread = 0;
+
+        hasBody = parser->flags & F_CHUNKED ||
+          (parser->content_length > 0 && parser->content_length != ULLONG_MAX);
+        if (parser->upgrade && (parser->method == HTTP_CONNECT ||
+                                (parser->flags & F_SKIPBODY) || !hasBody)) {
+          /* Exit, the rest of the message is in a different protocol. */
+          UPDATE_STATE(NEW_MESSAGE());
+          CALLBACK_NOTIFY(message_complete);
+          RETURN((p - data) + 1);
+        }
+
+        if (parser->flags & F_SKIPBODY) {
+          UPDATE_STATE(NEW_MESSAGE());
+          CALLBACK_NOTIFY(message_complete);
+        } else if (parser->flags & F_CHUNKED) {
+          /* chunked encoding - ignore Content-Length header */
+          UPDATE_STATE(s_chunk_size_start);
+        } else {
+          if (parser->content_length == 0) {
+            /* Content-Length header given but zero: Content-Length: 0\r\n */
+            UPDATE_STATE(NEW_MESSAGE());
+            CALLBACK_NOTIFY(message_complete);
+          } else if (parser->content_length != ULLONG_MAX) {
+            /* Content-Length header given and non-zero */
+            UPDATE_STATE(s_body_identity);
+          } else {
+            if (!http_message_needs_eof(parser)) {
+              /* Assume content-length 0 - read the next */
+              UPDATE_STATE(NEW_MESSAGE());
+              CALLBACK_NOTIFY(message_complete);
+            } else {
+              /* Read body until EOF */
+              UPDATE_STATE(s_body_identity_eof);
+            }
+          }
+        }
+
+        break;
+      }
+
+      case s_body_identity:
+      {
+        uint64_t to_read = MIN(parser->content_length,
+                               (uint64_t) ((data + len) - p));
+
+        assert(parser->content_length != 0
+            && parser->content_length != ULLONG_MAX);
+
+        /* The difference between advancing content_length and p is because
+         * the latter will automaticaly advance on the next loop iteration.
+         * Further, if content_length ends up at 0, we want to see the last
+         * byte again for our message complete callback.
+         */
+        MARK(body);
+        parser->content_length -= to_read;
+        p += to_read - 1;
+
+        if (parser->content_length == 0) {
+          UPDATE_STATE(s_message_done);
+
+          /* Mimic CALLBACK_DATA_NOADVANCE() but with one extra byte.
+           *
+           * The alternative to doing this is to wait for the next byte to
+           * trigger the data callback, just as in every other case. The
+           * problem with this is that this makes it difficult for the test
+           * harness to distinguish between complete-on-EOF and
+           * complete-on-length. It's not clear that this distinction is
+           * important for applications, but let's keep it for now.
+           */
+          CALLBACK_DATA_(body, p - body_mark + 1, p - data);
+          REEXECUTE();
+        }
+
+        break;
+      }
+
+      /* read until EOF */
+      case s_body_identity_eof:
+        MARK(body);
+        p = data + len - 1;
+
+        break;
+
+      case s_message_done:
+        UPDATE_STATE(NEW_MESSAGE());
+        CALLBACK_NOTIFY(message_complete);
+        if (parser->upgrade) {
+          /* Exit, the rest of the message is in a different protocol. */
+          RETURN((p - data) + 1);
+        }
+        break;
+
+      case s_chunk_size_start:
+      {
+        assert(nread == 1);
+        assert(parser->flags & F_CHUNKED);
+
+        unhex_val = unhex[(unsigned char)ch];
+        if (UNLIKELY(unhex_val == -1)) {
+          SET_ERRNO(HPE_INVALID_CHUNK_SIZE);
+          goto error;
+        }
+
+        parser->content_length = unhex_val;
+        UPDATE_STATE(s_chunk_size);
+        break;
+      }
+
+      case s_chunk_size:
+      {
+        uint64_t t;
+
+        assert(parser->flags & F_CHUNKED);
+
+        if (ch == CR) {
+          UPDATE_STATE(s_chunk_size_almost_done);
+          break;
+        }
+
+        unhex_val = unhex[(unsigned char)ch];
+
+        if (unhex_val == -1) {
+          if (ch == ';' || ch == ' ') {
+            UPDATE_STATE(s_chunk_parameters);
+            break;
+          }
+
+          SET_ERRNO(HPE_INVALID_CHUNK_SIZE);
+          goto error;
+        }
+
+        t = parser->content_length;
+        t *= 16;
+        t += unhex_val;
+
+        /* Overflow? Test against a conservative limit for simplicity. */
+        if (UNLIKELY((ULLONG_MAX - 16) / 16 < parser->content_length)) {
+          SET_ERRNO(HPE_INVALID_CONTENT_LENGTH);
+          goto error;
+        }
+
+        parser->content_length = t;
+        break;
+      }
+
+      case s_chunk_parameters:
+      {
+        assert(parser->flags & F_CHUNKED);
+        /* just ignore this shit. TODO check for overflow */
+        if (ch == CR) {
+          UPDATE_STATE(s_chunk_size_almost_done);
+          break;
+        }
+        break;
+      }
+
+      case s_chunk_size_almost_done:
+      {
+        assert(parser->flags & F_CHUNKED);
+        STRICT_CHECK(ch != LF);
+
+        parser->nread = 0;
+        nread = 0;
+
+        if (parser->content_length == 0) {
+          parser->flags |= F_TRAILING;
+          UPDATE_STATE(s_header_field_start);
+        } else {
+          UPDATE_STATE(s_chunk_data);
+        }
+        CALLBACK_NOTIFY(chunk_header);
+        break;
+      }
+
+      case s_chunk_data:
+      {
+        uint64_t to_read = MIN(parser->content_length,
+                               (uint64_t) ((data + len) - p));
+
+        assert(parser->flags & F_CHUNKED);
+        assert(parser->content_length != 0
+            && parser->content_length != ULLONG_MAX);
+
+        /* See the explanation in s_body_identity for why the content
+         * length and data pointers are managed this way.
+         */
+        MARK(body);
+        parser->content_length -= to_read;
+        p += to_read - 1;
+
+        if (parser->content_length == 0) {
+          UPDATE_STATE(s_chunk_data_almost_done);
+        }
+
+        break;
+      }
+
+      case s_chunk_data_almost_done:
+        assert(parser->flags & F_CHUNKED);
+        assert(parser->content_length == 0);
+        STRICT_CHECK(ch != CR);
+        UPDATE_STATE(s_chunk_data_done);
+        CALLBACK_DATA(body);
+        break;
+
+      case s_chunk_data_done:
+        assert(parser->flags & F_CHUNKED);
+        STRICT_CHECK(ch != LF);
+        parser->nread = 0;
+        nread = 0;
+        UPDATE_STATE(s_chunk_size_start);
+        CALLBACK_NOTIFY(chunk_complete);
+        break;
+
+      default:
+        assert(0 && "unhandled state");
+        SET_ERRNO(HPE_INVALID_INTERNAL_STATE);
+        goto error;
+    }
+  }
+
+  /* Run callbacks for any marks that we have leftover after we ran out of
+   * bytes. There should be at most one of these set, so it's OK to invoke
+   * them in series (unset marks will not result in callbacks).
+   *
+   * We use the NOADVANCE() variety of callbacks here because 'p' has already
+   * overflowed 'data' and this allows us to correct for the off-by-one that
+   * we'd otherwise have (since CALLBACK_DATA() is meant to be run with a 'p'
+   * value that's in-bounds).
+   */
+
+  assert(((header_field_mark ? 1 : 0) +
+          (header_value_mark ? 1 : 0) +
+          (url_mark ? 1 : 0)  +
+          (body_mark ? 1 : 0) +
+          (status_mark ? 1 : 0)) <= 1);
+
+  CALLBACK_DATA_NOADVANCE(header_field);
+  CALLBACK_DATA_NOADVANCE(header_value);
+  CALLBACK_DATA_NOADVANCE(url);
+  CALLBACK_DATA_NOADVANCE(body);
+  CALLBACK_DATA_NOADVANCE(status);
+
+  RETURN(len);
+
+error:
+  if (HTTP_PARSER_ERRNO(parser) == HPE_OK) {
+    SET_ERRNO(HPE_UNKNOWN);
+  }
+
+  RETURN(p - data);
+}
+
+
+/* Does the parser need to see an EOF to find the end of the message? */
+int
+http_message_needs_eof (const http_parser *parser)
+{
+  if (parser->type == HTTP_REQUEST) {
+    return 0;
+  }
+
+  /* See RFC 2616 section 4.4 */
+  if (parser->status_code / 100 == 1 || /* 1xx e.g. Continue */
+      parser->status_code == 204 ||     /* No Content */
+      parser->status_code == 304 ||     /* Not Modified */
+      parser->flags & F_SKIPBODY) {     /* response to a HEAD request */
+    return 0;
+  }
+
+  if ((parser->flags & F_CHUNKED) || parser->content_length != ULLONG_MAX) {
+    return 0;
+  }
+
+  return 1;
+}
+
+
+int
+http_should_keep_alive (const http_parser *parser)
+{
+  if (parser->http_major > 0 && parser->http_minor > 0) {
+    /* HTTP/1.1 */
+    if (parser->flags & F_CONNECTION_CLOSE) {
+      return 0;
+    }
+  } else {
+    /* HTTP/1.0 or earlier */
+    if (!(parser->flags & F_CONNECTION_KEEP_ALIVE)) {
+      return 0;
+    }
+  }
+
+  return !http_message_needs_eof(parser);
+}
+
+
+const char *
+http_method_str (enum http_method m)
+{
+  return ELEM_AT(method_strings, m, "<unknown>");
+}
+
+const char *
+http_status_str (enum http_status s)
+{
+  switch (s) {
+#define XX(num, name, string) case HTTP_STATUS_##name: return #string;
+    HTTP_STATUS_MAP(XX)
+#undef XX
+    default: return "<unknown>";
+  }
+}
+
+void
+http_parser_init (http_parser *parser, enum http_parser_type t)
+{
+  void *data = parser->data; /* preserve application data */
+  memset(parser, 0, sizeof(*parser));
+  parser->data = data;
+  parser->type = t;
+  parser->state = (t == HTTP_REQUEST ? s_start_req : (t == HTTP_RESPONSE ? s_start_res : s_start_req_or_res));
+  parser->http_errno = HPE_OK;
+}
+
+void
+http_parser_settings_init(http_parser_settings *settings)
+{
+  memset(settings, 0, sizeof(*settings));
+}
+
+const char *
+http_errno_name(enum http_errno err) {
+  assert(((size_t) err) < ARRAY_SIZE(http_strerror_tab));
+  return http_strerror_tab[err].name;
+}
+
+const char *
+http_errno_description(enum http_errno err) {
+  assert(((size_t) err) < ARRAY_SIZE(http_strerror_tab));
+  return http_strerror_tab[err].description;
+}
+
+static enum http_host_state
+http_parse_host_char(enum http_host_state s, const char ch) {
+  switch(s) {
+    case s_http_userinfo:
+    case s_http_userinfo_start:
+      if (ch == '@') {
+        return s_http_host_start;
+      }
+
+      if (IS_USERINFO_CHAR(ch)) {
+        return s_http_userinfo;
+      }
+      break;
+
+    case s_http_host_start:
+      if (ch == '[') {
+        return s_http_host_v6_start;
+      }
+
+      if (IS_HOST_CHAR(ch)) {
+        return s_http_host;
+      }
+
+      break;
+
+    case s_http_host:
+      if (IS_HOST_CHAR(ch)) {
+        return s_http_host;
+      }
+
+    /* fall through */
+    case s_http_host_v6_end:
+      if (ch == ':') {
+        return s_http_host_port_start;
+      }
+
+      break;
+
+    case s_http_host_v6:
+      if (ch == ']') {
+        return s_http_host_v6_end;
+      }
+
+    /* fall through */
+    case s_http_host_v6_start:
+      if (IS_HEX(ch) || ch == ':' || ch == '.') {
+        return s_http_host_v6;
+      }
+
+      if (s == s_http_host_v6 && ch == '%') {
+        return s_http_host_v6_zone_start;
+      }
+      break;
+
+    case s_http_host_v6_zone:
+      if (ch == ']') {
+        return s_http_host_v6_end;
+      }
+
+    /* fall through */
+    case s_http_host_v6_zone_start:
+      /* RFC 6874 Zone ID consists of 1*( unreserved / pct-encoded) */
+      if (IS_ALPHANUM(ch) || ch == '%' || ch == '.' || ch == '-' || ch == '_' ||
+          ch == '~') {
+        return s_http_host_v6_zone;
+      }
+      break;
+
+    case s_http_host_port:
+    case s_http_host_port_start:
+      if (IS_NUM(ch)) {
+        return s_http_host_port;
+      }
+
+      break;
+
+    default:
+      break;
+  }
+  return s_http_host_dead;
+}
+
+static int
+http_parse_host(const char * buf, struct http_parser_url *u, int found_at) {
+  enum http_host_state s;
+
+  const char *p;
+  size_t buflen = u->field_data[UF_HOST].off + u->field_data[UF_HOST].len;
+
+  assert(u->field_set & (1 << UF_HOST));
+
+  u->field_data[UF_HOST].len = 0;
+
+  s = found_at ? s_http_userinfo_start : s_http_host_start;
+
+  for (p = buf + u->field_data[UF_HOST].off; p < buf + buflen; p++) {
+    enum http_host_state new_s = http_parse_host_char(s, *p);
+
+    if (new_s == s_http_host_dead) {
+      return 1;
+    }
+
+    switch(new_s) {
+      case s_http_host:
+        if (s != s_http_host) {
+          u->field_data[UF_HOST].off = (uint16_t)(p - buf);
+        }
+        u->field_data[UF_HOST].len++;
+        break;
+
+      case s_http_host_v6:
+        if (s != s_http_host_v6) {
+          u->field_data[UF_HOST].off = (uint16_t)(p - buf);
+        }
+        u->field_data[UF_HOST].len++;
+        break;
+
+      case s_http_host_v6_zone_start:
+      case s_http_host_v6_zone:
+        u->field_data[UF_HOST].len++;
+        break;
+
+      case s_http_host_port:
+        if (s != s_http_host_port) {
+          u->field_data[UF_PORT].off = (uint16_t)(p - buf);
+          u->field_data[UF_PORT].len = 0;
+          u->field_set |= (1 << UF_PORT);
+        }
+        u->field_data[UF_PORT].len++;
+        break;
+
+      case s_http_userinfo:
+        if (s != s_http_userinfo) {
+          u->field_data[UF_USERINFO].off = (uint16_t)(p - buf);
+          u->field_data[UF_USERINFO].len = 0;
+          u->field_set |= (1 << UF_USERINFO);
+        }
+        u->field_data[UF_USERINFO].len++;
+        break;
+
+      default:
+        break;
+    }
+    s = new_s;
+  }
+
+  /* Make sure we don't end somewhere unexpected */
+  switch (s) {
+    case s_http_host_start:
+    case s_http_host_v6_start:
+    case s_http_host_v6:
+    case s_http_host_v6_zone_start:
+    case s_http_host_v6_zone:
+    case s_http_host_port_start:
+    case s_http_userinfo:
+    case s_http_userinfo_start:
+      return 1;
+    default:
+      break;
+  }
+
+  return 0;
+}
+
+void
+http_parser_url_init(struct http_parser_url *u) {
+  memset(u, 0, sizeof(*u));
+}
+
+int
+http_parser_parse_url(const char *buf, size_t buflen, int is_connect,
+                      struct http_parser_url *u)
+{
+  enum state s;
+  const char *p;
+  enum http_parser_url_fields uf, old_uf;
+  int found_at = 0;
+
+  if (buflen == 0) {
+    return 1;
+  }
+
+  u->port = u->field_set = 0;
+  s = is_connect ? s_req_server_start : s_req_spaces_before_url;
+  old_uf = UF_MAX;
+
+  for (p = buf; p < buf + buflen; p++) {
+    s = parse_url_char(s, *p);
+
+    /* Figure out the next field that we're operating on */
+    switch (s) {
+      case s_dead:
+        return 1;
+
+      /* Skip delimeters */
+      case s_req_schema_slash:
+      case s_req_schema_slash_slash:
+      case s_req_server_start:
+      case s_req_query_string_start:
+      case s_req_fragment_start:
+        continue;
+
+      case s_req_schema:
+        uf = UF_SCHEMA;
+        break;
+
+      case s_req_server_with_at:
+        found_at = 1;
+
+      /* fall through */
+      case s_req_server:
+        uf = UF_HOST;
+        break;
+
+      case s_req_path:
+        uf = UF_PATH;
+        break;
+
+      case s_req_query_string:
+        uf = UF_QUERY;
+        break;
+
+      case s_req_fragment:
+        uf = UF_FRAGMENT;
+        break;
+
+      default:
+        assert(!"Unexpected state");
+        return 1;
+    }
+
+    /* Nothing's changed; soldier on */
+    if (uf == old_uf) {
+      u->field_data[uf].len++;
+      continue;
+    }
+
+    u->field_data[uf].off = (uint16_t)(p - buf);
+    u->field_data[uf].len = 1;
+
+    u->field_set |= (1 << uf);
+    old_uf = uf;
+  }
+
+  /* host must be present if there is a schema */
+  /* parsing http:///toto will fail */
+  if ((u->field_set & (1 << UF_SCHEMA)) &&
+      (u->field_set & (1 << UF_HOST)) == 0) {
+    return 1;
+  }
+
+  if (u->field_set & (1 << UF_HOST)) {
+    if (http_parse_host(buf, u, found_at) != 0) {
+      return 1;
+    }
+  }
+
+  /* CONNECT requests can only contain "hostname:port" */
+  if (is_connect && u->field_set != ((1 << UF_HOST)|(1 << UF_PORT))) {
+    return 1;
+  }
+
+  if (u->field_set & (1 << UF_PORT)) {
+    uint16_t off;
+    uint16_t len;
+    const char* p;
+    const char* end;
+    unsigned long v;
+
+    off = u->field_data[UF_PORT].off;
+    len = u->field_data[UF_PORT].len;
+    end = buf + off + len;
+
+    /* NOTE: The characters are already validated and are in the [0-9] range */
+    assert(off + len <= buflen && "Port number overflow");
+    v = 0;
+    for (p = buf + off; p < end; p++) {
+      v *= 10;
+      v += *p - '0';
+
+      /* Ports have a max value of 2^16 */
+      if (v > 0xffff) {
+        return 1;
+      }
+    }
+
+    u->port = (uint16_t) v;
+  }
+
+  return 0;
+}
+
+void
+http_parser_pause(http_parser *parser, int paused) {
+  /* Users should only be pausing/unpausing a parser that is not in an error
+   * state. In non-debug builds, there's not much that we can do about this
+   * other than ignore it.
+   */
+  if (HTTP_PARSER_ERRNO(parser) == HPE_OK ||
+      HTTP_PARSER_ERRNO(parser) == HPE_PAUSED) {
+    uint32_t nread = parser->nread; /* used by the SET_ERRNO macro */
+    SET_ERRNO((paused) ? HPE_PAUSED : HPE_OK);
+  } else {
+    assert(0 && "Attempting to pause parser in error state");
+  }
+}
+
+int
+http_body_is_final(const struct http_parser *parser) {
+    return parser->state == s_message_done;
+}
+
+unsigned long
+http_parser_version(void) {
+  return HTTP_PARSER_VERSION_MAJOR * 0x10000 |
+         HTTP_PARSER_VERSION_MINOR * 0x00100 |
+         HTTP_PARSER_VERSION_PATCH * 0x00001;
+}
+
+void
+http_parser_set_max_header_size(uint32_t size) {
+  max_header_size = size;
+}
diff --git a/Pods/HTTPParserC/Sources/http_parser.h b/Pods/HTTPParserC/Sources/http_parser.h
new file mode 100644
index 0000000..16b5281
--- /dev/null
+++ b/Pods/HTTPParserC/Sources/http_parser.h
@@ -0,0 +1,439 @@
+/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+#ifndef http_parser_h
+#define http_parser_h
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Also update SONAME in the Makefile whenever you change these. */
+#define HTTP_PARSER_VERSION_MAJOR 2
+#define HTTP_PARSER_VERSION_MINOR 9
+#define HTTP_PARSER_VERSION_PATCH 2
+
+#include <stddef.h>
+#if defined(_WIN32) && !defined(__MINGW32__) && \
+  (!defined(_MSC_VER) || _MSC_VER<1600) && !defined(__WINE__)
+#include <BaseTsd.h>
+typedef __int8 int8_t;
+typedef unsigned __int8 uint8_t;
+typedef __int16 int16_t;
+typedef unsigned __int16 uint16_t;
+typedef __int32 int32_t;
+typedef unsigned __int32 uint32_t;
+typedef __int64 int64_t;
+typedef unsigned __int64 uint64_t;
+#else
+#include <stdint.h>
+#endif
+
+/* Compile with -DHTTP_PARSER_STRICT=0 to make less checks, but run
+ * faster
+ */
+#ifndef HTTP_PARSER_STRICT
+# define HTTP_PARSER_STRICT 1
+#endif
+
+/* Maximium header size allowed. If the macro is not defined
+ * before including this header then the default is used. To
+ * change the maximum header size, define the macro in the build
+ * environment (e.g. -DHTTP_MAX_HEADER_SIZE=<value>). To remove
+ * the effective limit on the size of the header, define the macro
+ * to a very large number (e.g. -DHTTP_MAX_HEADER_SIZE=0x7fffffff)
+ */
+#ifndef HTTP_MAX_HEADER_SIZE
+# define HTTP_MAX_HEADER_SIZE (80*1024)
+#endif
+
+typedef struct http_parser http_parser;
+typedef struct http_parser_settings http_parser_settings;
+
+
+/* Callbacks should return non-zero to indicate an error. The parser will
+ * then halt execution.
+ *
+ * The one exception is on_headers_complete. In a HTTP_RESPONSE parser
+ * returning '1' from on_headers_complete will tell the parser that it
+ * should not expect a body. This is used when receiving a response to a
+ * HEAD request which may contain 'Content-Length' or 'Transfer-Encoding:
+ * chunked' headers that indicate the presence of a body.
+ *
+ * Returning `2` from on_headers_complete will tell parser that it should not
+ * expect neither a body nor any futher responses on this connection. This is
+ * useful for handling responses to a CONNECT request which may not contain
+ * `Upgrade` or `Connection: upgrade` headers.
+ *
+ * http_data_cb does not return data chunks. It will be called arbitrarily
+ * many times for each string. E.G. you might get 10 callbacks for "on_url"
+ * each providing just a few characters more data.
+ */
+typedef int (*http_data_cb) (http_parser*, const char *at, size_t length);
+typedef int (*http_cb) (http_parser*);
+
+
+/* Status Codes */
+#define HTTP_STATUS_MAP(XX)                                                 \
+  XX(100, CONTINUE,                        Continue)                        \
+  XX(101, SWITCHING_PROTOCOLS,             Switching Protocols)             \
+  XX(102, PROCESSING,                      Processing)                      \
+  XX(200, OK,                              OK)                              \
+  XX(201, CREATED,                         Created)                         \
+  XX(202, ACCEPTED,                        Accepted)                        \
+  XX(203, NON_AUTHORITATIVE_INFORMATION,   Non-Authoritative Information)   \
+  XX(204, NO_CONTENT,                      No Content)                      \
+  XX(205, RESET_CONTENT,                   Reset Content)                   \
+  XX(206, PARTIAL_CONTENT,                 Partial Content)                 \
+  XX(207, MULTI_STATUS,                    Multi-Status)                    \
+  XX(208, ALREADY_REPORTED,                Already Reported)                \
+  XX(226, IM_USED,                         IM Used)                         \
+  XX(300, MULTIPLE_CHOICES,                Multiple Choices)                \
+  XX(301, MOVED_PERMANENTLY,               Moved Permanently)               \
+  XX(302, FOUND,                           Found)                           \
+  XX(303, SEE_OTHER,                       See Other)                       \
+  XX(304, NOT_MODIFIED,                    Not Modified)                    \
+  XX(305, USE_PROXY,                       Use Proxy)                       \
+  XX(307, TEMPORARY_REDIRECT,              Temporary Redirect)              \
+  XX(308, PERMANENT_REDIRECT,              Permanent Redirect)              \
+  XX(400, BAD_REQUEST,                     Bad Request)                     \
+  XX(401, UNAUTHORIZED,                    Unauthorized)                    \
+  XX(402, PAYMENT_REQUIRED,                Payment Required)                \
+  XX(403, FORBIDDEN,                       Forbidden)                       \
+  XX(404, NOT_FOUND,                       Not Found)                       \
+  XX(405, METHOD_NOT_ALLOWED,              Method Not Allowed)              \
+  XX(406, NOT_ACCEPTABLE,                  Not Acceptable)                  \
+  XX(407, PROXY_AUTHENTICATION_REQUIRED,   Proxy Authentication Required)   \
+  XX(408, REQUEST_TIMEOUT,                 Request Timeout)                 \
+  XX(409, CONFLICT,                        Conflict)                        \
+  XX(410, GONE,                            Gone)                            \
+  XX(411, LENGTH_REQUIRED,                 Length Required)                 \
+  XX(412, PRECONDITION_FAILED,             Precondition Failed)             \
+  XX(413, PAYLOAD_TOO_LARGE,               Payload Too Large)               \
+  XX(414, URI_TOO_LONG,                    URI Too Long)                    \
+  XX(415, UNSUPPORTED_MEDIA_TYPE,          Unsupported Media Type)          \
+  XX(416, RANGE_NOT_SATISFIABLE,           Range Not Satisfiable)           \
+  XX(417, EXPECTATION_FAILED,              Expectation Failed)              \
+  XX(421, MISDIRECTED_REQUEST,             Misdirected Request)             \
+  XX(422, UNPROCESSABLE_ENTITY,            Unprocessable Entity)            \
+  XX(423, LOCKED,                          Locked)                          \
+  XX(424, FAILED_DEPENDENCY,               Failed Dependency)               \
+  XX(426, UPGRADE_REQUIRED,                Upgrade Required)                \
+  XX(428, PRECONDITION_REQUIRED,           Precondition Required)           \
+  XX(429, TOO_MANY_REQUESTS,               Too Many Requests)               \
+  XX(431, REQUEST_HEADER_FIELDS_TOO_LARGE, Request Header Fields Too Large) \
+  XX(451, UNAVAILABLE_FOR_LEGAL_REASONS,   Unavailable For Legal Reasons)   \
+  XX(500, INTERNAL_SERVER_ERROR,           Internal Server Error)           \
+  XX(501, NOT_IMPLEMENTED,                 Not Implemented)                 \
+  XX(502, BAD_GATEWAY,                     Bad Gateway)                     \
+  XX(503, SERVICE_UNAVAILABLE,             Service Unavailable)             \
+  XX(504, GATEWAY_TIMEOUT,                 Gateway Timeout)                 \
+  XX(505, HTTP_VERSION_NOT_SUPPORTED,      HTTP Version Not Supported)      \
+  XX(506, VARIANT_ALSO_NEGOTIATES,         Variant Also Negotiates)         \
+  XX(507, INSUFFICIENT_STORAGE,            Insufficient Storage)            \
+  XX(508, LOOP_DETECTED,                   Loop Detected)                   \
+  XX(510, NOT_EXTENDED,                    Not Extended)                    \
+  XX(511, NETWORK_AUTHENTICATION_REQUIRED, Network Authentication Required) \
+
+enum http_status
+  {
+#define XX(num, name, string) HTTP_STATUS_##name = num,
+  HTTP_STATUS_MAP(XX)
+#undef XX
+  };
+
+
+/* Request Methods */
+#define HTTP_METHOD_MAP(XX)         \
+  XX(0,  DELETE,      DELETE)       \
+  XX(1,  GET,         GET)          \
+  XX(2,  HEAD,        HEAD)         \
+  XX(3,  POST,        POST)         \
+  XX(4,  PUT,         PUT)          \
+  /* pathological */                \
+  XX(5,  CONNECT,     CONNECT)      \
+  XX(6,  OPTIONS,     OPTIONS)      \
+  XX(7,  TRACE,       TRACE)        \
+  /* WebDAV */                      \
+  XX(8,  COPY,        COPY)         \
+  XX(9,  LOCK,        LOCK)         \
+  XX(10, MKCOL,       MKCOL)        \
+  XX(11, MOVE,        MOVE)         \
+  XX(12, PROPFIND,    PROPFIND)     \
+  XX(13, PROPPATCH,   PROPPATCH)    \
+  XX(14, SEARCH,      SEARCH)       \
+  XX(15, UNLOCK,      UNLOCK)       \
+  XX(16, BIND,        BIND)         \
+  XX(17, REBIND,      REBIND)       \
+  XX(18, UNBIND,      UNBIND)       \
+  XX(19, ACL,         ACL)          \
+  /* subversion */                  \
+  XX(20, REPORT,      REPORT)       \
+  XX(21, MKACTIVITY,  MKACTIVITY)   \
+  XX(22, CHECKOUT,    CHECKOUT)     \
+  XX(23, MERGE,       MERGE)        \
+  /* upnp */                        \
+  XX(24, MSEARCH,     M-SEARCH)     \
+  XX(25, NOTIFY,      NOTIFY)       \
+  XX(26, SUBSCRIBE,   SUBSCRIBE)    \
+  XX(27, UNSUBSCRIBE, UNSUBSCRIBE)  \
+  /* RFC-5789 */                    \
+  XX(28, PATCH,       PATCH)        \
+  XX(29, PURGE,       PURGE)        \
+  /* CalDAV */                      \
+  XX(30, MKCALENDAR,  MKCALENDAR)   \
+  /* RFC-2068, section 19.6.1.2 */  \
+  XX(31, LINK,        LINK)         \
+  XX(32, UNLINK,      UNLINK)       \
+  /* icecast */                     \
+  XX(33, SOURCE,      SOURCE)       \
+
+enum http_method
+  {
+#define XX(num, name, string) HTTP_##name = num,
+  HTTP_METHOD_MAP(XX)
+#undef XX
+  };
+
+
+enum http_parser_type { HTTP_REQUEST, HTTP_RESPONSE, HTTP_BOTH };
+
+
+/* Flag values for http_parser.flags field */
+enum flags
+  { F_CHUNKED               = 1 << 0
+  , F_CONNECTION_KEEP_ALIVE = 1 << 1
+  , F_CONNECTION_CLOSE      = 1 << 2
+  , F_CONNECTION_UPGRADE    = 1 << 3
+  , F_TRAILING              = 1 << 4
+  , F_UPGRADE               = 1 << 5
+  , F_SKIPBODY              = 1 << 6
+  , F_CONTENTLENGTH         = 1 << 7
+  };
+
+
+/* Map for errno-related constants
+ *
+ * The provided argument should be a macro that takes 2 arguments.
+ */
+#define HTTP_ERRNO_MAP(XX)                                           \
+  /* No error */                                                     \
+  XX(OK, "success")                                                  \
+                                                                     \
+  /* Callback-related errors */                                      \
+  XX(CB_message_begin, "the on_message_begin callback failed")       \
+  XX(CB_url, "the on_url callback failed")                           \
+  XX(CB_header_field, "the on_header_field callback failed")         \
+  XX(CB_header_value, "the on_header_value callback failed")         \
+  XX(CB_headers_complete, "the on_headers_complete callback failed") \
+  XX(CB_body, "the on_body callback failed")                         \
+  XX(CB_message_complete, "the on_message_complete callback failed") \
+  XX(CB_status, "the on_status callback failed")                     \
+  XX(CB_chunk_header, "the on_chunk_header callback failed")         \
+  XX(CB_chunk_complete, "the on_chunk_complete callback failed")     \
+                                                                     \
+  /* Parsing-related errors */                                       \
+  XX(INVALID_EOF_STATE, "stream ended at an unexpected time")        \
+  XX(HEADER_OVERFLOW,                                                \
+     "too many header bytes seen; overflow detected")                \
+  XX(CLOSED_CONNECTION,                                              \
+     "data received after completed connection: close message")      \
+  XX(INVALID_VERSION, "invalid HTTP version")                        \
+  XX(INVALID_STATUS, "invalid HTTP status code")                     \
+  XX(INVALID_METHOD, "invalid HTTP method")                          \
+  XX(INVALID_URL, "invalid URL")                                     \
+  XX(INVALID_HOST, "invalid host")                                   \
+  XX(INVALID_PORT, "invalid port")                                   \
+  XX(INVALID_PATH, "invalid path")                                   \
+  XX(INVALID_QUERY_STRING, "invalid query string")                   \
+  XX(INVALID_FRAGMENT, "invalid fragment")                           \
+  XX(LF_EXPECTED, "LF character expected")                           \
+  XX(INVALID_HEADER_TOKEN, "invalid character in header")            \
+  XX(INVALID_CONTENT_LENGTH,                                         \
+     "invalid character in content-length header")                   \
+  XX(UNEXPECTED_CONTENT_LENGTH,                                      \
+     "unexpected content-length header")                             \
+  XX(INVALID_CHUNK_SIZE,                                             \
+     "invalid character in chunk size header")                       \
+  XX(INVALID_CONSTANT, "invalid constant string")                    \
+  XX(INVALID_INTERNAL_STATE, "encountered unexpected internal state")\
+  XX(STRICT, "strict mode assertion failed")                         \
+  XX(PAUSED, "parser is paused")                                     \
+  XX(UNKNOWN, "an unknown error occurred")
+
+
+/* Define HPE_* values for each errno value above */
+#define HTTP_ERRNO_GEN(n, s) HPE_##n,
+enum http_errno {
+  HTTP_ERRNO_MAP(HTTP_ERRNO_GEN)
+};
+#undef HTTP_ERRNO_GEN
+
+
+/* Get an http_errno value from an http_parser */
+#define HTTP_PARSER_ERRNO(p)            ((enum http_errno) (p)->http_errno)
+
+
+struct http_parser {
+  /** PRIVATE **/
+  unsigned int type : 2;         /* enum http_parser_type */
+  unsigned int flags : 8;        /* F_* values from 'flags' enum; semi-public */
+  unsigned int state : 7;        /* enum state from http_parser.c */
+  unsigned int header_state : 7; /* enum header_state from http_parser.c */
+  unsigned int index : 7;        /* index into current matcher */
+  unsigned int lenient_http_headers : 1;
+
+  uint32_t nread;          /* # bytes read in various scenarios */
+  uint64_t content_length; /* # bytes in body (0 if no Content-Length header) */
+
+  /** READ-ONLY **/
+  unsigned short http_major;
+  unsigned short http_minor;
+  unsigned int status_code : 16; /* responses only */
+  unsigned int method : 8;       /* requests only */
+  unsigned int http_errno : 7;
+
+  /* 1 = Upgrade header was present and the parser has exited because of that.
+   * 0 = No upgrade header present.
+   * Should be checked when http_parser_execute() returns in addition to
+   * error checking.
+   */
+  unsigned int upgrade : 1;
+
+  /** PUBLIC **/
+  void *data; /* A pointer to get hook to the "connection" or "socket" object */
+};
+
+
+struct http_parser_settings {
+  http_cb      on_message_begin;
+  http_data_cb on_url;
+  http_data_cb on_status;
+  http_data_cb on_header_field;
+  http_data_cb on_header_value;
+  http_cb      on_headers_complete;
+  http_data_cb on_body;
+  http_cb      on_message_complete;
+  /* When on_chunk_header is called, the current chunk length is stored
+   * in parser->content_length.
+   */
+  http_cb      on_chunk_header;
+  http_cb      on_chunk_complete;
+};
+
+
+enum http_parser_url_fields
+  { UF_SCHEMA           = 0
+  , UF_HOST             = 1
+  , UF_PORT             = 2
+  , UF_PATH             = 3
+  , UF_QUERY            = 4
+  , UF_FRAGMENT         = 5
+  , UF_USERINFO         = 6
+  , UF_MAX              = 7
+  };
+
+
+/* Result structure for http_parser_parse_url().
+ *
+ * Callers should index into field_data[] with UF_* values iff field_set
+ * has the relevant (1 << UF_*) bit set. As a courtesy to clients (and
+ * because we probably have padding left over), we convert any port to
+ * a uint16_t.
+ */
+struct http_parser_url {
+  uint16_t field_set;           /* Bitmask of (1 << UF_*) values */
+  uint16_t port;                /* Converted UF_PORT string */
+
+  struct {
+    uint16_t off;               /* Offset into buffer in which field starts */
+    uint16_t len;               /* Length of run in buffer */
+  } field_data[UF_MAX];
+};
+
+
+/* Returns the library version. Bits 16-23 contain the major version number,
+ * bits 8-15 the minor version number and bits 0-7 the patch level.
+ * Usage example:
+ *
+ *   unsigned long version = http_parser_version();
+ *   unsigned major = (version >> 16) & 255;
+ *   unsigned minor = (version >> 8) & 255;
+ *   unsigned patch = version & 255;
+ *   printf("http_parser v%u.%u.%u\n", major, minor, patch);
+ */
+unsigned long http_parser_version(void);
+
+void http_parser_init(http_parser *parser, enum http_parser_type type);
+
+
+/* Initialize http_parser_settings members to 0
+ */
+void http_parser_settings_init(http_parser_settings *settings);
+
+
+/* Executes the parser. Returns number of parsed bytes. Sets
+ * `parser->http_errno` on error. */
+size_t http_parser_execute(http_parser *parser,
+                           const http_parser_settings *settings,
+                           const char *data,
+                           size_t len);
+
+
+/* If http_should_keep_alive() in the on_headers_complete or
+ * on_message_complete callback returns 0, then this should be
+ * the last message on the connection.
+ * If you are the server, respond with the "Connection: close" header.
+ * If you are the client, close the connection.
+ */
+int http_should_keep_alive(const http_parser *parser);
+
+/* Returns a string version of the HTTP method. */
+const char *http_method_str(enum http_method m);
+
+/* Returns a string version of the HTTP status code. */
+const char *http_status_str(enum http_status s);
+
+/* Return a string name of the given error */
+const char *http_errno_name(enum http_errno err);
+
+/* Return a string description of the given error */
+const char *http_errno_description(enum http_errno err);
+
+/* Initialize all http_parser_url members to 0 */
+void http_parser_url_init(struct http_parser_url *u);
+
+/* Parse a URL; return nonzero on failure */
+int http_parser_parse_url(const char *buf, size_t buflen,
+                          int is_connect,
+                          struct http_parser_url *u);
+
+/* Pause or un-pause the parser; a nonzero value pauses */
+void http_parser_pause(http_parser *parser, int paused);
+
+/* Checks if this is the final chunk of the body. */
+int http_body_is_final(const http_parser *parser);
+
+/* Change the maximum header size provided at compile time. */
+void http_parser_set_max_header_size(uint32_t size);
+
+#ifdef __cplusplus
+}
+#endif
+#endif
diff --git a/Pods/Manifest.lock b/Pods/Manifest.lock
index 7197b9f..1a91a3c 100644
--- a/Pods/Manifest.lock
+++ b/Pods/Manifest.lock
@@ -1,17 +1,26 @@
 PODS:
-  - Realm (3.13.1):
-    - Realm/Headers (= 3.13.1)
-  - Realm/Headers (3.13.1)
-  - RealmSwift (3.13.1):
-    - Realm (= 3.13.1)
+  - CocoaAsyncSocket (7.6.3)
+  - HTTPParserC (2.9.2)
+  - Realm (4.3.0):
+    - Realm/Headers (= 4.3.0)
+  - Realm/Headers (4.3.0)
+  - RealmSwift (4.3.0):
+    - Realm (= 4.3.0)
+  - Telegraph (0.27):
+    - CocoaAsyncSocket (~> 7.5)
+    - HTTPParserC (~> 2.7)
 
 DEPENDENCIES:
   - RealmSwift
+  - Telegraph
 
 SPEC CHECKSUMS:
-  Realm: 50071da38fe079e0735e47c9f2eae738c68c5996
-  RealmSwift: 8a1e6a02b7a08cd17a31e3115143fb69fe5f3fb9
+  CocoaAsyncSocket: eafaa68a7e0ec99ead0a7b35015e0bf25d2c8987
+  HTTPParserC: 1ed389f80bb57a5b967d87d5358b8a94418394ee
+  Realm: 9357c3589555793e1860a7104a7412bca4a48d99
+  RealmSwift: 402f1e379a8ef82c635313037b043f0f06de880c
+  Telegraph: 28cfb24fae20bc1399475062352977cc314aa097
 
-PODFILE CHECKSUM: 119c88ad294b09ac6c692cc9eacc1e76733a8458
+PODFILE CHECKSUM: b112a5394a83be5c825d47408783e80cbf9870ed
 
 COCOAPODS: 1.4.0
diff --git a/Pods/Pods.xcodeproj/project.pbxproj b/Pods/Pods.xcodeproj/project.pbxproj
index 5972992..e67c8d7 100644
--- a/Pods/Pods.xcodeproj/project.pbxproj
+++ b/Pods/Pods.xcodeproj/project.pbxproj
@@ -7,536 +7,892 @@
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+				MACOSX_DEPLOYMENT_TARGET = 10.6;
+				MODULEMAP_FILE = "Target Support Files/HTTPParserC/HTTPParserC.modulemap";
+				PRODUCT_NAME = HTTPParserC;
+				SDKROOT = macosx;
+				SKIP_INSTALL = YES;
+				SWIFT_ACTIVE_COMPILATION_CONDITIONS = "$(inherited) ";
+				SWIFT_VERSION = 4.2.1;
+				VERSIONING_SYSTEM = "apple-generic";
+				VERSION_INFO_PREFIX = "";
+			};
+			name = Release;
+		};
 /* End XCBuildConfiguration section */
 
 /* Begin XCConfigurationList section */
-		13856847B4047FF25A6D3F117CD57A7C /* Build configuration list for PBXNativeTarget "Realm" */ = {
+		18882D75F37F972B4F66B373CD38B26F /* Build configuration list for PBXNativeTarget "HTTPParserC" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				AE00D73733CB57E6CAADABDB08F23929 /* Debug */,
+				C4DDC72D958DD0FEE674BC0C330D1287 /* Release */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
+		3C0CB1EE7CDE278D8027F7C5D3794D8B /* Build configuration list for PBXNativeTarget "CocoaAsyncSocket" */ = {
 			isa = XCConfigurationList;
 			buildConfigurations = (
-				87E61A9A90DD5DB8208CD30F4A41FC29 /* Debug */,
-				8CFEBB6B9804E4DBB54E43C78F2867CA /* Release */,
+				58ED6463284C6FE6978BF5EDC8C14DE2 /* Debug */,
+				1D0CBCE89F0F7051430947C4F733134D /* Release */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
+		4244180099125EF51058BE5F2C8E5EA9 /* Build configuration list for PBXNativeTarget "Realm" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				66D4F5DB1348EE3C1C0B6AA5B328F1A7 /* Debug */,
+				B5256A437A715CB1B6EAE6AED0BD80A3 /* Release */,
 			);
 			defaultConfigurationIsVisible = 0;
 			defaultConfigurationName = Release;
@@ -1476,20 +2313,29 @@
 			defaultConfigurationIsVisible = 0;
 			defaultConfigurationName = Release;
 		};
-		63F9BAB82ADCE6337344244C9165F759 /* Build configuration list for PBXNativeTarget "RealmSwift" */ = {
+		C4E4756D130FEFAFC11F48148D92147D /* Build configuration list for PBXNativeTarget "Telegraph" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				C0C706C125156DE08342E71A1342DCC5 /* Debug */,
+				7B510DB83E0CA91F2904D1EDE79F2BEC /* Release */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
+		CBC2B4F07009B000B05BAF43FD8AEDD1 /* Build configuration list for PBXNativeTarget "RealmSwift" */ = {
 			isa = XCConfigurationList;
 			buildConfigurations = (
-				1630AF23ADF7A1B21CF59524206BBE90 /* Debug */,
-				1844D0DC8BF6CDB7D596F86186509F5A /* Release */,
+				B3C565AE3CD4B46B992CA665CDCFD137 /* Debug */,
+				387FD3F57C25B76D04FDBC738F002541 /* Release */,
 			);
 			defaultConfigurationIsVisible = 0;
 			defaultConfigurationName = Release;
 		};
-		7C7719B6264A0CCD8C6C68351C9EE14D /* Build configuration list for PBXNativeTarget "Pods-Jared" */ = {
+		DF90396D3D5D8A08A95B5F174AE0621C /* Build configuration list for PBXNativeTarget "Pods-Jared" */ = {
 			isa = XCConfigurationList;
 			buildConfigurations = (
-				64038B4CEAE60E4E981686802E0644A7 /* Debug */,
-				B591C454E02963DBDEC6609226AF4D4B /* Release */,
+				5759689BFB275F687EDFE19E5405499A /* Debug */,
+				8B838F5BB146204F8AC82A603FAAD5C8 /* Release */,
 			);
 			defaultConfigurationIsVisible = 0;
 			defaultConfigurationName = Release;
diff --git a/Pods/Pods.xcodeproj/xcuserdata/Zeke.xcuserdatad/xcschemes/xcschememanagement.plist b/Pods/Pods.xcodeproj/xcuserdata/Zeke.xcuserdatad/xcschemes/xcschememanagement.plist
index 3cf9484..3d381bb 100644
--- a/Pods/Pods.xcodeproj/xcuserdata/Zeke.xcuserdatad/xcschemes/xcschememanagement.plist
+++ b/Pods/Pods.xcodeproj/xcuserdata/Zeke.xcuserdatad/xcschemes/xcschememanagement.plist
@@ -4,35 +4,38 @@
 <dict>
 	<key>SchemeUserState</key>
 	<dict>
-		<key>Pods-Jared.xcscheme_^#shared#^_</key>
+		<key>CocoaAsyncSocket.xcscheme</key>
+		<dict>
+			<key>isShown</key>
+			<false/>
+		</dict>
+		<key>HTTPParserC.xcscheme</key>
+		<dict>
+			<key>isShown</key>
+			<false/>
+		</dict>
+		<key>Pods-Jared.xcscheme</key>
 		<dict>
 			<key>isShown</key>
 			<false/>
-			<key>orderHint</key>
-			<integer>3</integer>
 		</dict>
 		<key>Realm.xcscheme</key>
 		<dict>
 			<key>isShown</key>
 			<false/>
-			<key>orderHint</key>
-			<integer>4</integer>
 		</dict>
 		<key>RealmSwift.xcscheme</key>
 		<dict>
 			<key>isShown</key>
 			<false/>
-			<key>orderHint</key>
-			<integer>5</integer>
 		</dict>
-	</dict>
-	<key>SuppressBuildableAutocreation</key>
-	<dict>
-		<key>588125751AAD1527CABB39C5619418C0</key>
+		<key>Telegraph.xcscheme</key>
 		<dict>
-			<key>primary</key>
-			<true/>
+			<key>isShown</key>
+			<false/>
 		</dict>
 	</dict>
+	<key>SuppressBuildableAutocreation</key>
+	<dict/>
 </dict>
 </plist>
diff --git a/Pods/Realm/README.md b/Pods/Realm/README.md
index ae255b2..d111286 100644
--- a/Pods/Realm/README.md
+++ b/Pods/Realm/README.md
@@ -19,19 +19,18 @@ Please see the detailed instructions in our docs to add [Realm Objective-C](http
 ### Realm Objective-C
 
 The documentation can be found at [realm.io/docs/objc/latest](https://realm.io/docs/objc/latest).  
-The API reference is located at [realm.io/docs/objc/latest/api](https://realm.io/docs/objc/latest/api).
+The API reference is located at [realm.io/docs/objc/latest/api/](https://realm.io/docs/objc/latest/api/).
 
 ### Realm Swift
 
 The documentation can be found at [realm.io/docs/swift/latest](https://realm.io/docs/swift/latest).  
-The API reference is located at [realm.io/docs/swift/latest/api](https://realm.io/docs/swift/latest/api).
+The API reference is located at [realm.io/docs/swift/latest/api/](https://realm.io/docs/swift/latest/api/).
 
 ## Getting Help
 
-- **Need help with your code?**: Look for previous questions on the  [#realm tag](https://stackoverflow.com/questions/tagged/realm?sort=newest) — or [ask a new question](https://stackoverflow.com/questions/ask?tags=realm). We actively monitor & answer questions on SO!
-- **Have a bug to report?** [Open an issue](https://github.com/realm/realm-cocoa/issues/new). If possible, include the version of Realm, a full log, the Realm file, and a project that shows the issue.
-- **Have a feature request?** [Open an issue](https://github.com/realm/realm-cocoa/issues/new). Tell us what the feature should do, and why you want the feature.
-- Sign up for our [**Community Newsletter**](https://realm.io/realm-news-subscribe) to get regular tips, learn about other use-cases and get alerted of blogposts and tutorials about Realm.
+- **Need help with your code?**: Look for previous questions with the[`realm` tag](https://stackoverflow.com/questions/tagged/realm?sort=newest) on Stack Overflow or [ask a new question](https://stackoverflow.com/questions/ask?tags=realm). For general discussion that might be considered too broad for Stack Overflow, use the [Realm Forums](https://forums.realm.io).
+- **Have a bug to report?** [Open a GitHub issue](https://github.com/realm/realm-cocoa/issues/new). If possible, include the version of Realm, a full log, the Realm file, and a project that shows the issue.
+- **Have a feature request?** [Open a GitHub issue](https://github.com/realm/realm-cocoa/issues/new). Tell us what the feature should do and why you want the feature.
 
 ## Building Realm
 
diff --git a/Pods/Realm/Realm/ObjectStore/src/impl/apple/external_commit_helper.cpp b/Pods/Realm/Realm/ObjectStore/src/impl/apple/external_commit_helper.cpp
index 60f7a66..fd56c9e 100644
--- a/Pods/Realm/Realm/ObjectStore/src/impl/apple/external_commit_helper.cpp
+++ b/Pods/Realm/Realm/ObjectStore/src/impl/apple/external_commit_helper.cpp
@@ -17,9 +17,11 @@
 ////////////////////////////////////////////////////////////////////////////
 
 #include "impl/external_commit_helper.hpp"
-
 #include "impl/realm_coordinator.hpp"
 
+#include <realm/group_shared_options.hpp>
+#include <realm/util/fifo_helper.hpp>
+
 #include <asl.h>
 #include <assert.h>
 #include <fcntl.h>
@@ -53,6 +55,7 @@ void notify_fd(int fd, int read_fd)
         read(read_fd, buff, sizeof buff);
     }
 }
+
 } // anonymous namespace
 
 void ExternalCommitHelper::FdHolder::close()
@@ -95,27 +98,38 @@ ExternalCommitHelper::ExternalCommitHelper(RealmCoordinator& parent)
     }
 
 #if !TARGET_OS_TV
-    auto path = parent.get_path() + ".note";
 
-    // Create and open the named pipe
-    int ret = mkfifo(path.c_str(), 0600);
-    if (ret == -1) {
-        int err = errno;
-        if (err == ENOTSUP) {
-            // Filesystem doesn't support named pipes, so try putting it in tmp instead
-            // Hash collisions are okay here because they just result in doing
-            // extra work, as opposed to correctness problems
-            std::ostringstream ss;
-            ss << getenv("TMPDIR");
-            ss << "realm_" << std::hash<std::string>()(path) << ".note";
-            path = ss.str();
-            ret = mkfifo(path.c_str(), 0600);
-            err = errno;
-        }
-        // the fifo already existing isn't an error
-        if (ret == -1 && err != EEXIST) {
-            throw std::system_error(err, std::system_category());
-        }
+
+    // Object Store needs to create a named pipe in order to coordinate notifications.
+    // This can be a problem on some file systems (e.g. FAT32) or due to security policies in SELinux. Most commonly
+    // it is a problem when saving Realms on external storage: https://stackoverflow.com/questions/2740321/how-to-create-named-pipe-mkfifo-in-android
+    //
+    // For this reason we attempt to create this file in a temporary location known to be safe to write these files.
+    //
+    // In order of priority we attempt to write the file in the following locations:
+    //  1) Next to the Realm file itself
+    //  2) A location defined by `Realm::Config::fifo_files_fallback_path`
+    //  3) A location defined by `SharedGroupOptions::set_sys_tmp_dir()`
+    //
+    // Core has a similar policy for its named pipes.
+    //
+    // Also see https://github.com/realm/realm-java/issues/3140
+    // Note that hash collisions are okay here because they just result in doing extra work instead of resulting
+    // in correctness problems.
+
+    std::string path;
+    std::string temp_dir = util::normalize_dir(parent.get_config().fifo_files_fallback_path);
+    std::string sys_temp_dir = util::normalize_dir(SharedGroupOptions::get_sys_tmp_dir());
+
+    path = parent.get_path() + ".note";
+    bool fifo_created = realm::util::try_create_fifo(path);
+    if (!fifo_created && !temp_dir.empty()) {
+        path = util::format("%1realm_%2.note", temp_dir, std::hash<std::string>()(parent.get_path()));
+        fifo_created = realm::util::try_create_fifo(path);
+    }
+    if (!fifo_created && !sys_temp_dir.empty()) {
+        path = util::format("%1realm_%2.note", sys_temp_dir, std::hash<std::string>()(parent.get_path()));
+        realm::util::create_fifo(path);
     }
 
     m_notify_fd = open(path.c_str(), O_RDWR);
@@ -125,7 +139,7 @@ ExternalCommitHelper::ExternalCommitHelper(RealmCoordinator& parent)
 
     // Make writing to the pipe return -1 when the pipe's buffer is full
     // rather than blocking until there's space available
-    ret = fcntl(m_notify_fd, F_SETFL, O_NONBLOCK);
+    int ret = fcntl(m_notify_fd, F_SETFL, O_NONBLOCK);
     if (ret == -1) {
         throw std::system_error(errno, std::system_category());
     }
@@ -154,7 +168,7 @@ ExternalCommitHelper::ExternalCommitHelper(RealmCoordinator& parent)
     m_shutdown_read_fd = shutdown_pipe[0];
     m_shutdown_write_fd = shutdown_pipe[1];
 
-    m_thread = std::async(std::launch::async, [=] {
+    m_thread = std::thread([=] {
         try {
             listen();
         }
@@ -177,12 +191,12 @@ ExternalCommitHelper::ExternalCommitHelper(RealmCoordinator& parent)
 ExternalCommitHelper::~ExternalCommitHelper()
 {
     notify_fd(m_shutdown_write_fd, m_shutdown_read_fd);
-    m_thread.wait(); // Wait for the thread to exit
+    m_thread.join(); // Wait for the thread to exit
 }
 
 void ExternalCommitHelper::listen()
 {
-    pthread_setname_np("RLMRealm notification listener");
+    pthread_setname_np("Realm notification listener");
 
     // Set up the kqueue
     // EVFILT_READ indicates that we care about data being available to read
@@ -200,11 +214,11 @@ void ExternalCommitHelper::listen()
         // Wait for data to become on either fd
         // Return code is number of bytes available or -1 on error
         ret = kevent(m_kq, nullptr, 0, &event, 1, nullptr);
-        assert(ret >= 0);
-        if (ret == 0) {
+        if (ret == 0 || (ret < 0 && errno == EINTR)) {
             // Spurious wakeup; just wait again
             continue;
         }
+        assert(ret > 0);
 
         // Check which file descriptor had activity: if it's the shutdown
         // pipe, then someone called -stop; otherwise it's the named pipe
diff --git a/Pods/Realm/Realm/ObjectStore/src/impl/primitive_list_notifier.cpp b/Pods/Realm/Realm/ObjectStore/src/impl/primitive_list_notifier.cpp
index 9be9acb..111807f 100644
--- a/Pods/Realm/Realm/ObjectStore/src/impl/primitive_list_notifier.cpp
+++ b/Pods/Realm/Realm/ObjectStore/src/impl/primitive_list_notifier.cpp
@@ -40,16 +40,17 @@ void PrimitiveListNotifier::release_data() noexcept
 
 void PrimitiveListNotifier::do_attach_to(SharedGroup& sg)
 {
-    REALM_ASSERT(m_table_handover);
     REALM_ASSERT(!m_table);
-    m_table = sg.import_table_from_handover(std::move(m_table_handover));
+    if (m_table_handover)
+        m_table = sg.import_table_from_handover(std::move(m_table_handover));
 }
 
 void PrimitiveListNotifier::do_detach_from(SharedGroup& sg)
 {
     REALM_ASSERT(!m_table_handover);
     if (m_table) {
-        m_table_handover = sg.export_table_for_handover(m_table);
+        if (m_table->is_attached())
+            m_table_handover = sg.export_table_for_handover(m_table);
         m_table = {};
     }
 }
diff --git a/Pods/Realm/Realm/ObjectStore/src/impl/realm_coordinator.cpp b/Pods/Realm/Realm/ObjectStore/src/impl/realm_coordinator.cpp
index 343193a..05f8baf 100644
--- a/Pods/Realm/Realm/ObjectStore/src/impl/realm_coordinator.cpp
+++ b/Pods/Realm/Realm/ObjectStore/src/impl/realm_coordinator.cpp
@@ -25,10 +25,14 @@
 #include "binding_context.hpp"
 #include "object_schema.hpp"
 #include "object_store.hpp"
+#include "property.hpp"
 #include "schema.hpp"
+#include "thread_safe_reference.hpp"
 
 #if REALM_ENABLE_SYNC
 #include "sync/impl/work_queue.hpp"
+#include "sync/async_open_task.hpp"
+#include "sync/partial_sync.hpp"
 #include "sync/sync_config.hpp"
 #include "sync/sync_manager.hpp"
 #include "sync/sync_session.hpp"
@@ -76,7 +80,7 @@ std::shared_ptr<RealmCoordinator> RealmCoordinator::get_existing_coordinator(Str
     return it == s_coordinators_per_path.end() ? nullptr : it->second.lock();
 }
 
-void RealmCoordinator::create_sync_session()
+void RealmCoordinator::create_sync_session(bool force_client_resync, bool validate_sync_history)
 {
 #if REALM_ENABLE_SYNC
     if (m_sync_session)
@@ -93,8 +97,8 @@ void RealmCoordinator::create_sync_session()
     }
 
     auto sync_config = *m_config.sync_config;
-    sync_config.validate_sync_history = false;
-    m_sync_session = SyncManager::shared().get_session(m_config.path, sync_config);
+    sync_config.validate_sync_history = validate_sync_history;
+    m_sync_session = SyncManager::shared().get_session(m_config.path, sync_config, force_client_resync);
 
     std::weak_ptr<RealmCoordinator> weak_self = shared_from_this();
     SyncSession::Internal::set_sync_transact_callback(*m_sync_session,
@@ -106,6 +110,9 @@ void RealmCoordinator::create_sync_session()
                 self->m_notifier->notify_others();
         }
     });
+#else
+    static_cast<void>(force_client_resync);
+    static_cast<void>(validate_sync_history);
 #endif
 }
 
@@ -178,11 +185,40 @@ void RealmCoordinator::set_config(const Realm::Config& config)
             }
         }
 #endif
+        // Mixing cached and uncached Realms is allowed
+        m_config.cache = config.cache;
 
         // Realm::update_schema() handles complaining about schema mismatches
     }
 }
 
+std::shared_ptr<Realm> RealmCoordinator::get_cached_realm(Realm::Config const& config, AnyExecutionContextID execution_context)
+{
+    if (!config.cache)
+        return nullptr;
+    for (auto& cached_realm : m_weak_realm_notifiers) {
+        if (!cached_realm.is_cached_for_execution_context(execution_context))
+            continue;
+        // can be null if we jumped in between ref count hitting zero and
+        // unregister_realm() getting the lock
+        if (auto realm = cached_realm.realm()) {
+            // If the file is uninitialized and was opened without a schema,
+            // do the normal schema init
+            if (realm->schema_version() == ObjectStore::NotVersioned)
+                break;
+
+            // Otherwise if we have a realm schema it needs to be an exact
+            // match (even having the same properties but in different
+            // orders isn't good enough)
+            if (config.schema && realm->schema() != *config.schema)
+                throw MismatchedConfigException("Realm at path '%1' already opened on current thread with different schema.", config.path);
+
+            return realm;
+        }
+    }
+    return nullptr;
+}
+
 std::shared_ptr<Realm> RealmCoordinator::get_realm(Realm::Config config)
 {
     // realm must be declared before lock so that the mutex is released before
@@ -190,68 +226,134 @@ std::shared_ptr<Realm> RealmCoordinator::get_realm(Realm::Config config)
     // to acquire the same lock
     std::shared_ptr<Realm> realm;
     std::unique_lock<std::mutex> lock(m_realm_mutex);
-
     set_config(config);
+    if ((realm = get_cached_realm(config, config.execution_context)))
+        return realm;
+    do_get_realm(std::move(config), realm, lock);
+    return realm;
+}
+
+std::shared_ptr<Realm> RealmCoordinator::get_realm()
+{
+    std::shared_ptr<Realm> realm;
+    std::unique_lock<std::mutex> lock(m_realm_mutex);
+    if ((realm = get_cached_realm(m_config, m_config.execution_context)))
+        return realm;
+    do_get_realm(m_config, realm, lock);
+    return realm;
+}
+
+ThreadSafeReference<Realm> RealmCoordinator::get_unbound_realm()
+{
+    ThreadSafeReference<Realm> ref;
+    std::unique_lock<std::mutex> lock(m_realm_mutex);
+    do_get_realm(m_config, ref.m_realm, lock, false);
+    return ref;
+}
 
+void RealmCoordinator::do_get_realm(Realm::Config config, std::shared_ptr<Realm>& realm,
+                                    std::unique_lock<std::mutex>& realm_lock, bool bind_to_context)
+{
     auto schema = std::move(config.schema);
     auto migration_function = std::move(config.migration_function);
     auto initialization_function = std::move(config.initialization_function);
+    auto audit_factory = std::move(config.audit_factory);
     config.schema = {};
 
-    if (config.cache) {
-        AnyExecutionContextID execution_context(config.execution_context);
-        for (auto& cached_realm : m_weak_realm_notifiers) {
-            if (!cached_realm.is_cached_for_execution_context(execution_context))
-                continue;
-            // can be null if we jumped in between ref count hitting zero and
-            // unregister_realm() getting the lock
-            if ((realm = cached_realm.realm())) {
-                // If the file is uninitialized and was opened without a schema,
-                // do the normal schema init
-                if (realm->schema_version() == ObjectStore::NotVersioned)
-                    break;
-
-                // Otherwise if we have a realm schema it needs to be an exact
-                // match (even having the same properties but in different
-                // orders isn't good enough)
-                if (schema && realm->schema() != *schema)
-                    throw MismatchedConfigException("Realm at path '%1' already opened on current thread with different schema.", config.path);
-
-                return realm;
-            }
+    bool should_initialize_notifier = !config.immutable() && config.automatic_change_notifications;
+    realm = Realm::make_shared_realm(std::move(config), shared_from_this());
+    if (!m_notifier && should_initialize_notifier) {
+        try {
+            m_notifier = std::make_unique<ExternalCommitHelper>(*this);
         }
-    }
-
-    if (!realm) {
-        bool should_initialize_notifier = !config.immutable() && config.automatic_change_notifications;
-        realm = Realm::make_shared_realm(std::move(config), shared_from_this());
-        if (!m_notifier && should_initialize_notifier) {
-            try {
-                m_notifier = std::make_unique<ExternalCommitHelper>(*this);
-            }
-            catch (std::system_error const& ex) {
-                throw RealmFileException(RealmFileException::Kind::AccessError, get_path(), ex.code().message(), "");
-            }
+        catch (std::system_error const& ex) {
+            throw RealmFileException(RealmFileException::Kind::AccessError, get_path(), ex.code().message(), "");
         }
-        m_weak_realm_notifiers.emplace_back(realm, realm->config().cache);
     }
+    m_weak_realm_notifiers.emplace_back(realm, realm->config().cache, bind_to_context);
 
     if (realm->config().sync_config)
-        create_sync_session();
+        create_sync_session(false, false);
+
+    if (!m_audit_context && audit_factory)
+        m_audit_context = audit_factory();
 
+    realm_lock.unlock();
     if (schema) {
-        lock.unlock();
+#if REALM_ENABLE_SYNC && REALM_PLATFORM_JAVA
+        // Workaround for https://github.com/realm/realm-java/issues/6619
+        // Between Realm Java 5.10.0 and 5.13.0 created_at/updated_at was optional
+        // when created from Java, even though the Object Store code specified them as
+        // required. Due to how the Realm was initialized, this wasn't a problem before
+        // 5.13.0, but after that the Object Store initializer code was changed causing
+        // problems when Java clients upgraded. In order to prevent older clients from
+        // breaking with a schema mismatch when upgrading we thus fix the schema in transit.
+        // This means that schema reported back from Realm will be different than the one
+        // specified in the Java model class, but this seemed like the approach with the
+        // least amount of disadvantages.
+        if (realm->is_partial()) {
+            auto& new_schema = schema.value();
+            auto current_schema = realm->schema();
+            auto current_resultsets_schema_obj = current_schema.find("__ResultSets");
+            if (current_resultsets_schema_obj != current_schema.end()) {
+                Property* p = current_resultsets_schema_obj->property_for_public_name("created_at");
+                if (is_nullable(p->type)) {
+                    auto it = new_schema.find("__ResultSets");
+                    if (it != new_schema.end()) {
+                        auto created_at_property = it->property_for_public_name("created_at");
+                        auto updated_at_property = it->property_for_public_name("updated_at");
+                        if (created_at_property && updated_at_property) {
+                            created_at_property->type = created_at_property->type | PropertyType::Nullable;
+                            updated_at_property->type = updated_at_property->type | PropertyType::Nullable;
+                        }
+                    }
+                }
+            }
+        }
+#endif
         realm->update_schema(std::move(*schema), config.schema_version, std::move(migration_function),
                              std::move(initialization_function));
     }
+#if REALM_ENABLE_SYNC
+    else if (realm->is_partial())
+        _impl::ensure_partial_sync_schema_initialized(*realm);
+#endif
+}
+
+void RealmCoordinator::bind_to_context(Realm& realm, AnyExecutionContextID execution_context)
+{
+    std::unique_lock<std::mutex> lock(m_realm_mutex);
+    for (auto& cached_realm : m_weak_realm_notifiers) {
+        if (!cached_realm.is_for_realm(&realm))
+            continue;
+        cached_realm.bind_to_execution_context(execution_context);
+        return;
+    }
+    REALM_TERMINATE("Invalid Realm passed to bind_to_context()");
+}
 
-    return realm;
+#if REALM_ENABLE_SYNC
+std::shared_ptr<AsyncOpenTask> RealmCoordinator::get_synchronized_realm(Realm::Config config)
+{
+    if (!config.sync_config)
+        throw std::logic_error("This method is only available for fully synchronized Realms.");
+
+    std::unique_lock<std::mutex> lock(m_realm_mutex);
+    set_config(config);
+    bool exists = File::exists(m_config.path);
+    create_sync_session(!config.sync_config->is_partial && !exists, exists);
+    return std::make_shared<AsyncOpenTask>(shared_from_this(), m_sync_session);
 }
 
-std::shared_ptr<Realm> RealmCoordinator::get_realm()
+void RealmCoordinator::create_session(const Realm::Config& config)
 {
-    return get_realm(m_config);
+    REALM_ASSERT(config.sync_config);
+    std::unique_lock<std::mutex> lock(m_realm_mutex);
+    set_config(config);
+    bool exists = File::exists(m_config.path);
+    create_sync_session(!config.sync_config->is_partial && !exists, exists);
 }
+#endif
 
 bool RealmCoordinator::get_cached_schema(Schema& schema, uint64_t& schema_version,
                                          uint64_t& transaction) const noexcept
@@ -301,7 +403,7 @@ void RealmCoordinator::advance_schema_cache(uint64_t previous, uint64_t next)
 
 RealmCoordinator::RealmCoordinator()
 #if REALM_ENABLE_SYNC
-: m_partial_sync_work_queue(std::make_unique<partial_sync::WorkQueue>())
+: m_partial_sync_work_queue(std::make_unique<_impl::partial_sync::WorkQueue>())
 #endif
 {
 }
@@ -321,10 +423,19 @@ RealmCoordinator::~RealmCoordinator()
 
 void RealmCoordinator::unregister_realm(Realm* realm)
 {
-    std::lock_guard<std::mutex> lock(m_realm_mutex);
-    auto new_end = remove_if(begin(m_weak_realm_notifiers), end(m_weak_realm_notifiers),
-                             [=](auto& notifier) { return notifier.expired() || notifier.is_for_realm(realm); });
-    m_weak_realm_notifiers.erase(new_end, end(m_weak_realm_notifiers));
+    // Normally results notifiers are cleaned up by the background worker thread
+    // but if that's disabled we need to ensure that any notifiers from this
+    // Realm get cleaned up
+    if (!m_config.automatic_change_notifications) {
+        std::unique_lock<std::mutex> lock(m_notifier_mutex);
+        clean_up_dead_notifiers();
+    }
+    {
+        std::lock_guard<std::mutex> lock(m_realm_mutex);
+        auto new_end = remove_if(begin(m_weak_realm_notifiers), end(m_weak_realm_notifiers),
+                                 [=](auto& notifier) { return notifier.expired() || notifier.is_for_realm(realm); });
+        m_weak_realm_notifiers.erase(new_end, end(m_weak_realm_notifiers));
+    }
 }
 
 void RealmCoordinator::clear_cache()
@@ -630,6 +741,7 @@ void RealmCoordinator::run_async_notifiers()
     clean_up_dead_notifiers();
 
     if (m_notifiers.empty() && m_new_notifiers.empty()) {
+        m_notifier_cv.notify_all();
         return;
     }
 
@@ -640,6 +752,7 @@ void RealmCoordinator::run_async_notifiers()
     if (m_async_error) {
         std::move(m_new_notifiers.begin(), m_new_notifiers.end(), std::back_inserter(m_notifiers));
         m_new_notifiers.clear();
+        m_notifier_cv.notify_all();
         return;
     }
 
@@ -864,11 +977,10 @@ void RealmCoordinator::process_available_async(Realm& realm)
     if (notifiers.empty())
         return;
 
-    if (realm.m_binding_context)
-        realm.m_binding_context->will_send_notifications();
-
     if (auto error = m_async_error) {
         lock.unlock();
+        if (realm.m_binding_context)
+            realm.m_binding_context->will_send_notifications();
         for (auto& notifier : notifiers)
             notifier->deliver_error(m_async_error);
         if (realm.m_binding_context)
@@ -878,19 +990,25 @@ void RealmCoordinator::process_available_async(Realm& realm)
 
     bool in_read = realm.is_in_read_transaction();
     auto& sg = Realm::Internal::get_shared_group(realm);
-    if (!sg) // i.e. the Realm was closed in a callback above
-        return;
     auto version = sg->get_version_of_current_transaction();
     auto package = [&](auto& notifier) {
         return !(notifier->has_run() && (!in_read || notifier->version() == version) && notifier->package_for_delivery());
     };
     notifiers.erase(std::remove_if(begin(notifiers), end(notifiers), package), end(notifiers));
+    if (notifiers.empty())
+        return;
     lock.unlock();
 
     // no before advance because the Realm is already at the given version,
     // because we're either sending initial notifications or the write was
     // done on this Realm instance
 
+    if (realm.m_binding_context) {
+        realm.m_binding_context->will_send_notifications();
+        if (!sg) // i.e. the Realm was closed in the callback above
+            return;
+    }
+
     // Skip delivering if the Realm isn't in a read transaction
     if (in_read) {
         for (auto& notifier : notifiers)
@@ -907,12 +1025,12 @@ void RealmCoordinator::process_available_async(Realm& realm)
 
 void RealmCoordinator::set_transaction_callback(std::function<void(VersionID, VersionID)> fn)
 {
-    create_sync_session();
+    create_sync_session(false, false);
     m_transaction_callback = std::move(fn);
 }
 
 #if REALM_ENABLE_SYNC
-partial_sync::WorkQueue& RealmCoordinator::partial_sync_work_queue()
+_impl::partial_sync::WorkQueue& RealmCoordinator::partial_sync_work_queue()
 {
     return *m_partial_sync_work_queue;
 }
diff --git a/Pods/Realm/Realm/ObjectStore/src/impl/weak_realm_notifier.cpp b/Pods/Realm/Realm/ObjectStore/src/impl/weak_realm_notifier.cpp
index 1620eea..d52c2e6 100644
--- a/Pods/Realm/Realm/ObjectStore/src/impl/weak_realm_notifier.cpp
+++ b/Pods/Realm/Realm/ObjectStore/src/impl/weak_realm_notifier.cpp
@@ -24,13 +24,12 @@
 using namespace realm;
 using namespace realm::_impl;
 
-
-WeakRealmNotifier::WeakRealmNotifier(const std::shared_ptr<Realm>& realm, bool cache)
+WeakRealmNotifier::WeakRealmNotifier(const std::shared_ptr<Realm>& realm, bool cache, bool bind_to_context)
 : m_realm(realm)
 , m_execution_context(realm->config().execution_context)
 , m_realm_key(realm.get())
 , m_cache(cache)
-, m_signal(std::make_shared<util::EventLoopSignal<Callback>>(Callback{realm}))
+, m_signal(bind_to_context ? std::make_shared<util::EventLoopSignal<Callback>>(Callback{realm}) : nullptr)
 {
 }
 
@@ -45,5 +44,13 @@ void WeakRealmNotifier::Callback::operator()() const
 
 void WeakRealmNotifier::notify()
 {
-    m_signal->notify();
+    if (m_signal)
+        m_signal->notify();
+}
+
+void WeakRealmNotifier::bind_to_execution_context(AnyExecutionContextID context)
+{
+    REALM_ASSERT(!m_signal);
+    m_signal = std::make_shared<util::EventLoopSignal<Callback>>(Callback{m_realm});
+    m_execution_context = context;
 }
diff --git a/Pods/Realm/Realm/ObjectStore/src/object_schema.cpp b/Pods/Realm/Realm/ObjectStore/src/object_schema.cpp
index e5082fb..4e6f4d8 100644
--- a/Pods/Realm/Realm/ObjectStore/src/object_schema.cpp
+++ b/Pods/Realm/Realm/ObjectStore/src/object_schema.cpp
@@ -93,7 +93,8 @@ ObjectSchema::ObjectSchema(Group const& group, StringData name, size_t index) :
     set_primary_key_property();
 }
 
-Property *ObjectSchema::property_for_name(StringData name) {
+Property *ObjectSchema::property_for_name(StringData name)
+{
     for (auto& prop : persisted_properties) {
         if (StringData(prop.name) == name) {
             return &prop;
@@ -107,11 +108,36 @@ Property *ObjectSchema::property_for_name(StringData name) {
     return nullptr;
 }
 
-const Property *ObjectSchema::property_for_name(StringData name) const {
+Property *ObjectSchema::property_for_public_name(StringData public_name)
+{
+    // If no `public_name` is defined, the internal `name` is also considered the public name.
+    for (auto& prop : persisted_properties) {
+        if (prop.public_name == public_name || (prop.public_name.empty() && prop.name == public_name))
+            return &prop;
+    }
+
+    // Computed properties are not persisted, so creating a public name for such properties
+    // are a bit pointless since the internal name is already the "public name", but since
+    // this distinction isn't visible in the Property struct we allow it anyway.
+    for (auto& prop : computed_properties) {
+        if ((prop.public_name.empty() ? StringData(prop.name) :  StringData(prop.public_name)) == public_name)
+            return &prop;
+    }
+    return nullptr;
+}
+
+const Property *ObjectSchema::property_for_public_name(StringData public_name) const
+{
+    return const_cast<ObjectSchema *>(this)->property_for_public_name(public_name);
+}
+
+const Property *ObjectSchema::property_for_name(StringData name) const
+{
     return const_cast<ObjectSchema *>(this)->property_for_name(name);
 }
 
-bool ObjectSchema::property_is_computed(Property const& property) const {
+bool ObjectSchema::property_is_computed(Property const& property) const
+{
     auto end = computed_properties.end();
     return std::find(computed_properties.begin(), end, property) != end;
 }
@@ -214,6 +240,62 @@ static void validate_property(Schema const& schema,
 
 void ObjectSchema::validate(Schema const& schema, std::vector<ObjectSchemaValidationException>& exceptions) const
 {
+    std::vector<StringData> public_property_names;
+    std::vector<StringData> internal_property_names;
+    internal_property_names.reserve(persisted_properties.size() + computed_properties.size());
+    auto gather_names = [&](auto const &properties) {
+        for (auto const &prop : properties) {
+            internal_property_names.push_back(prop.name);
+            if (!prop.public_name.empty())
+                public_property_names.push_back(prop.public_name);
+        }
+    };
+    gather_names(persisted_properties);
+    gather_names(computed_properties);
+    std::sort(public_property_names.begin(), public_property_names.end());
+    std::sort(internal_property_names.begin(), internal_property_names.end());
+
+    // Check that property names and aliases are unique
+    auto for_each_duplicate = [](auto &&container, auto &&fn) {
+        auto end = container.end();
+        for (auto it = std::adjacent_find(container.begin(), end); it != end; it = std::adjacent_find(it + 2, end))
+            fn(*it);
+    };
+    for_each_duplicate(public_property_names, [&](auto public_property_name) {
+        exceptions.emplace_back("Alias '%1' appears more than once in the schema for type '%2'.",
+                                public_property_name, name);
+    });
+    for_each_duplicate(internal_property_names, [&](auto internal_name) {
+        exceptions.emplace_back("Property '%1' appears more than once in the schema for type '%2'.",
+                                internal_name, name);
+    });
+
+    // Check that no aliases conflict with property names
+    struct ErrorWriter {
+        ObjectSchema const &os;
+        std::vector<ObjectSchemaValidationException> &exceptions;
+
+        struct Proxy {
+            ObjectSchema const &os;
+            std::vector<ObjectSchemaValidationException> &exceptions;
+
+            Proxy &operator=(StringData name) {
+                exceptions.emplace_back(
+                        "Property '%1.%2' has an alias '%3' that conflicts with a property of the same name.",
+                        os.name, os.property_for_public_name(name)->name, name);
+                return *this;
+            }
+        };
+
+        Proxy operator*() { return Proxy{os, exceptions}; }
+        ErrorWriter &operator=(const ErrorWriter &) { return *this; }
+        ErrorWriter &operator++() { return *this; }
+        ErrorWriter &operator++(int) { return *this; }
+    } writer{*this, exceptions};
+    std::set_intersection(public_property_names.begin(), public_property_names.end(),
+                          internal_property_names.begin(), internal_property_names.end(), writer);
+
+    // Validate all properties
     const Property *primary = nullptr;
     for (auto const& prop : persisted_properties) {
         validate_property(schema, name, prop, &primary, exceptions);
diff --git a/Pods/Realm/Realm/ObjectStore/src/results.cpp b/Pods/Realm/Realm/ObjectStore/src/results.cpp
index 9b0e107..15c21f2 100644
--- a/Pods/Realm/Realm/ObjectStore/src/results.cpp
+++ b/Pods/Realm/Realm/ObjectStore/src/results.cpp
@@ -20,6 +20,7 @@
 
 #include "impl/realm_coordinator.hpp"
 #include "impl/results_notifier.hpp"
+#include "audit.hpp"
 #include "object_schema.hpp"
 #include "object_store.hpp"
 #include "schema.hpp"
@@ -267,6 +268,8 @@ void Results::evaluate_query_if_needed(bool wants_notifications)
                 prepare_async(ForCallback{false});
             m_has_used_table_view = true;
             m_table_view.sync_if_needed();
+            if (auto audit = m_realm->audit_context())
+                audit->record_query(m_realm->read_transaction_version(), m_table_view);
             break;
     }
 }
@@ -624,14 +627,21 @@ Results Results::apply_ordering(DescriptorOrdering&& ordering)
     DescriptorOrdering new_order = m_descriptor_ordering;
     for (size_t i = 0; i < ordering.size(); ++i) {
         auto desc = ordering[i];
-        if (auto sort = dynamic_cast<const SortDescriptor*>(desc))
-            new_order.append_sort(std::move(*sort));
-        else if (auto distinct = dynamic_cast<const DistinctDescriptor*>(desc))
-            new_order.append_distinct(std::move(*distinct));
-        else if (auto limit = dynamic_cast<const LimitDescriptor*>(desc))
-            new_order.append_limit(std::move(*limit));
-        else
-            REALM_COMPILER_HINT_UNREACHABLE();
+        DescriptorType desc_type = ordering.get_type(i);
+        switch (desc_type) {
+            case DescriptorType::Sort:
+                new_order.append_sort(std::move(*dynamic_cast<const SortDescriptor*>(desc)));
+                break;
+            case DescriptorType::Distinct:
+                new_order.append_distinct(std::move(*dynamic_cast<const DistinctDescriptor*>(desc)));
+                break;
+            case DescriptorType::Limit:
+                new_order.append_limit(std::move(*dynamic_cast<const LimitDescriptor*>(desc)));
+                break;
+            case DescriptorType::Include:
+                new_order.append_include(std::move(*dynamic_cast<const IncludeDescriptor*>(desc)));
+                break;
+        }
     }
     return Results(m_realm, get_query(), std::move(new_order));
 }
diff --git a/Pods/Realm/Realm/ObjectStore/src/schema.cpp b/Pods/Realm/Realm/ObjectStore/src/schema.cpp
index 7916fee..4b572e7 100644
--- a/Pods/Realm/Realm/ObjectStore/src/schema.cpp
+++ b/Pods/Realm/Realm/ObjectStore/src/schema.cpp
@@ -80,6 +80,7 @@ void Schema::validate() const
 {
     std::vector<ObjectSchemaValidationException> exceptions;
 
+    // As the types are added sorted by name, we can detect duplicates by just looking at the following element.
     auto find_next_duplicate = [&](const_iterator start) {
         return std::adjacent_find(start, cend(), [](ObjectSchema const& lft, ObjectSchema const& rgt) {
             return lft.name == rgt.name;
diff --git a/Pods/Realm/Realm/ObjectStore/src/shared_realm.cpp b/Pods/Realm/Realm/ObjectStore/src/shared_realm.cpp
index 80f2e24..a3f2665 100644
--- a/Pods/Realm/Realm/ObjectStore/src/shared_realm.cpp
+++ b/Pods/Realm/Realm/ObjectStore/src/shared_realm.cpp
@@ -22,6 +22,7 @@
 #include "impl/realm_coordinator.hpp"
 #include "impl/transact_log_handler.hpp"
 
+#include "audit.hpp"
 #include "binding_context.hpp"
 #include "list.hpp"
 #include "object.hpp"
@@ -33,6 +34,8 @@
 
 #include <realm/history.hpp>
 #include <realm/util/scope_exit.hpp>
+#include <realm/util/fifo_helper.hpp>
+
 
 #if REALM_ENABLE_SYNC
 #include "sync/impl/sync_file.hpp"
@@ -144,7 +147,7 @@ REALM_NOINLINE static void translate_file_exception(StringData path, bool immuta
 static bool is_nonupgradable_history(IncompatibleHistories const& ex)
 {
     // FIXME: Replace this with a proper specific exception type once Core adds support for it.
-    return ex.what() == std::string("Incompatible histories. Nonupgradable history schema");
+    return std::string(ex.what()).find(std::string("Incompatible histories. Nonupgradable history schema")) != npos;
 }
 #endif
 
@@ -180,6 +183,9 @@ void Realm::open_with_config(const Config& config,
             SharedGroupOptions options;
             options.durability = config.in_memory ? SharedGroupOptions::Durability::MemOnly :
                                                     SharedGroupOptions::Durability::Full;
+            if (!config.fifo_files_fallback_path.empty()) {
+                options.temp_dir = util::normalize_dir(config.fifo_files_fallback_path);
+            }
             options.encryption_key = config.encryption_key.data();
             options.allow_file_format_upgrade = !config.disable_format_upgrade &&
                                                 config.schema_mode != SchemaMode::ResetFile;
@@ -205,7 +211,7 @@ void Realm::open_with_config(const Config& config,
             translate_file_exception(config.path, config.immutable()); // Throws
 
         // Move the Realm file into the recovery directory.
-        std::string recovery_directory = SyncManager::shared().recovery_directory_path();
+        std::string recovery_directory = SyncManager::shared().recovery_directory_path(config.sync_config ? config.sync_config->recovery_directory : none);
         std::string new_realm_path = util::reserve_unique_file_name(recovery_directory, "synced-realm-XXXXXXX");
         util::File::move(config.path, new_realm_path);
 
@@ -267,6 +273,26 @@ SharedRealm Realm::get_shared_realm(Config config)
     return coordinator->get_realm(std::move(config));
 }
 
+SharedRealm Realm::get_shared_realm(ThreadSafeReference<Realm> ref, util::Optional<AbstractExecutionContextID> execution_context)
+{
+    REALM_ASSERT(ref.m_realm);
+    auto& config = ref.m_realm->config();
+    auto coordinator = RealmCoordinator::get_coordinator(config.path);
+    if (auto realm = coordinator->get_cached_realm(config, execution_context))
+        return realm;
+    coordinator->bind_to_context(*ref.m_realm, execution_context);
+    ref.m_realm->m_execution_context = execution_context;
+    return std::move(ref.m_realm);
+}
+
+#if REALM_ENABLE_SYNC
+std::shared_ptr<AsyncOpenTask> Realm::get_synchronized_realm(Config config)
+{
+    auto coordinator = RealmCoordinator::get_coordinator(config.path);
+    return coordinator->get_synchronized_realm(std::move(config));
+}
+#endif
+
 void Realm::set_schema(Schema const& reference, Schema schema)
 {
     m_dynamic_schema = false;
@@ -585,14 +611,14 @@ void Realm::notify_schema_changed()
     }
 }
 
-static void check_read_write(Realm *realm)
+static void check_read_write(const Realm* realm)
 {
     if (realm->config().immutable()) {
         throw InvalidTransactionException("Can't perform transactions on read-only Realms.");
     }
 }
 
-static void check_write(Realm* realm)
+static void check_write(const Realm* realm)
 {
     if (realm->config().immutable() || realm->config().read_only_alternative()) {
         throw InvalidTransactionException("Can't perform transactions on read-only Realms.");
@@ -623,6 +649,14 @@ void Realm::verify_open() const
     }
 }
 
+VersionID Realm::read_transaction_version() const
+{
+    verify_thread();
+    verify_open();
+    check_read_write(this);
+    return m_shared_group->get_version_of_current_transaction();
+}
+
 bool Realm::is_in_transaction() const noexcept
 {
     if (!m_shared_group) {
@@ -678,7 +712,15 @@ void Realm::commit_transaction()
         throw InvalidTransactionException("Can't commit a non-existing write transaction");
     }
 
-    m_coordinator->commit_write(*this);
+    if (auto audit = audit_context()) {
+        auto prev_version = m_shared_group->pin_version();
+        m_coordinator->commit_write(*this);
+        audit->record_write(prev_version, m_shared_group->get_version_of_current_transaction());
+        m_shared_group->unpin_version(prev_version);
+    }
+    else {
+        m_coordinator->commit_write(*this);
+    }
     cache_new_schema();
     invalidate_permission_cache();
 }
@@ -779,6 +821,9 @@ void Realm::notify()
 
     if (m_binding_context) {
         m_binding_context->before_notify();
+        if (is_closed() || is_in_transaction()) {
+            return;
+        }
     }
 
     auto cleanup = util::make_scope_exit([this]() noexcept { m_is_sending_notifications = false; });
@@ -864,7 +909,7 @@ bool Realm::refresh()
 
 bool Realm::can_deliver_notifications() const noexcept
 {
-    if (m_config.immutable()) {
+    if (m_config.immutable() || !m_config.automatic_change_notifications) {
         return false;
     }
 
@@ -987,6 +1032,11 @@ template Object Realm::resolve_thread_safe_reference(ThreadSafeReference<Object>
 template List Realm::resolve_thread_safe_reference(ThreadSafeReference<List> reference);
 template Results Realm::resolve_thread_safe_reference(ThreadSafeReference<Results> reference);
 
+AuditInterface* Realm::audit_context() const noexcept
+{
+    return m_coordinator ? m_coordinator->audit_context() : nullptr;
+}
+
 #if REALM_ENABLE_SYNC
 static_assert(static_cast<int>(ComputedPrivileges::Read) == static_cast<int>(sync::Privilege::Read), "");
 static_assert(static_cast<int>(ComputedPrivileges::Update) == static_cast<int>(sync::Privilege::Update), "");
@@ -1107,8 +1157,3 @@ Group& RealmFriend::read_group_to(Realm& realm, VersionID version)
     realm.begin_read(version);
     return *realm.m_group;
 }
-
-std::size_t Realm::compute_size() {
-    Group& group = read_group();
-    return group.compute_aggregated_byte_size();
-}
diff --git a/Pods/Realm/Realm/ObjectStore/src/sync/async_open_task.cpp b/Pods/Realm/Realm/ObjectStore/src/sync/async_open_task.cpp
new file mode 100644
index 0000000..3189cd5
--- /dev/null
+++ b/Pods/Realm/Realm/ObjectStore/src/sync/async_open_task.cpp
@@ -0,0 +1,89 @@
+////////////////////////////////////////////////////////////////////////////
+//
+// Copyright 2019 Realm Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+////////////////////////////////////////////////////////////////////////////
+
+#include "sync/async_open_task.hpp"
+
+#include "impl/realm_coordinator.hpp"
+#include "sync/sync_manager.hpp"
+#include "sync/sync_session.hpp"
+#include "thread_safe_reference.hpp"
+
+namespace realm {
+
+AsyncOpenTask::AsyncOpenTask(std::shared_ptr<_impl::RealmCoordinator> coordinator, std::shared_ptr<realm::SyncSession> session)
+: m_coordinator(coordinator)
+, m_session(session)
+{
+}
+
+void AsyncOpenTask::start(std::function<void(ThreadSafeReference<Realm>, std::exception_ptr)> callback)
+{
+    auto session = m_session.load();
+    if (!session)
+        return;
+
+    std::shared_ptr<AsyncOpenTask> self(shared_from_this());
+    session->wait_for_download_completion([callback, self, this](std::error_code ec) {
+       auto session = m_session.exchange(nullptr);
+        if (!session)
+            return; // Swallow all events if the task as been canceled.
+
+        // Release our references to the coordinator after calling the callback
+        auto coordinator = std::move(m_coordinator);
+        m_coordinator = nullptr;
+
+        if (ec)
+            return callback({}, std::make_exception_ptr(std::system_error(ec)));
+
+        ThreadSafeReference<Realm> realm;
+        try {
+            realm = coordinator->get_unbound_realm();
+        }
+        catch (...) {
+            return callback({}, std::current_exception());
+        }
+        callback(std::move(realm), nullptr);
+    });
+}
+
+void AsyncOpenTask::cancel()
+{
+    if (auto session = m_session.exchange(nullptr)) {
+        // Does a better way exists for canceling the download?
+        session->log_out();
+        m_coordinator = nullptr;
+    }
+}
+
+uint64_t AsyncOpenTask::register_download_progress_notifier(std::function<SyncProgressNotifierCallback> callback)
+{
+    if (auto session = m_session.load()) {
+        return session->register_progress_notifier(callback, realm::SyncSession::NotifierType::download, false);
+    }
+    else {
+        return 0;
+    }
+}
+
+void AsyncOpenTask::unregister_download_progress_notifier(uint64_t token)
+{
+    if (auto session = m_session.load())
+        session->unregister_progress_notifier(token);
+}
+
+}
diff --git a/Pods/Realm/Realm/ObjectStore/src/sync/impl/sync_metadata.cpp b/Pods/Realm/Realm/ObjectStore/src/sync/impl/sync_metadata.cpp
index 5ac9134..99dbee4 100644
--- a/Pods/Realm/Realm/ObjectStore/src/sync/impl/sync_metadata.cpp
+++ b/Pods/Realm/Realm/ObjectStore/src/sync/impl/sync_metadata.cpp
@@ -87,6 +87,7 @@ SyncMetadataManager::SyncMetadataManager(std::string path,
     constexpr uint64_t SCHEMA_VERSION = 2;
 
     Realm::Config config;
+    config.automatic_change_notifications = false;
     config.path = path;
     config.schema = make_schema();
     config.schema_version = SCHEMA_VERSION;
@@ -188,8 +189,7 @@ SyncUserMetadataResults SyncMetadataManager::all_users_marked_for_removal() cons
 
 SyncUserMetadataResults SyncMetadataManager::get_users(bool marked) const
 {
-    SharedRealm realm = Realm::get_shared_realm(m_metadata_config);
-
+    auto realm = get_realm();
     TableRef table = ObjectStore::table_for_object_type(realm->read_group(), c_sync_userMetadata);
     Query query = table->where().equal(m_user_schema.idx_marked_for_removal, marked);
 
@@ -199,34 +199,17 @@ SyncUserMetadataResults SyncMetadataManager::get_users(bool marked) const
 
 SyncFileActionMetadataResults SyncMetadataManager::all_pending_actions() const
 {
-    SharedRealm realm = Realm::get_shared_realm(m_metadata_config);
+    auto realm = get_realm();
     TableRef table = ObjectStore::table_for_object_type(realm->read_group(), c_sync_fileActionMetadata);
     Results results(realm, table->where());
     return SyncFileActionMetadataResults(std::move(results), std::move(realm), m_file_action_schema);
 }
 
-bool SyncMetadataManager::delete_metadata_action(const std::string& original_name) const
-{
-    auto shared_realm = Realm::get_shared_realm(m_metadata_config);
-
-    // Retrieve the row for this object.
-    TableRef table = ObjectStore::table_for_object_type(shared_realm->read_group(), c_sync_fileActionMetadata);
-    shared_realm->begin_transaction();
-    size_t row_idx = table->find_first_string(m_file_action_schema.idx_original_name, original_name);
-    if (row_idx == not_found) {
-        shared_realm->cancel_transaction();
-        return false;
-    }
-    table->move_last_over(row_idx);
-    shared_realm->commit_transaction();
-    return true;
-}
-
 util::Optional<SyncUserMetadata> SyncMetadataManager::get_or_make_user_metadata(const std::string& identity,
                                                                                 const std::string& url,
                                                                                 bool make_if_absent) const
 {
-    auto realm = Realm::get_shared_realm(m_metadata_config);
+    auto realm = get_realm();
     auto& schema = m_user_schema;
 
     // Retrieve or create the row for this object.
@@ -286,38 +269,41 @@ util::Optional<SyncUserMetadata> SyncMetadataManager::get_or_make_user_metadata(
     return SyncUserMetadata(schema, std::move(realm), std::move(*row));
 }
 
-SyncFileActionMetadata SyncMetadataManager::make_file_action_metadata(const std::string &original_name,
-                                                                      const std::string &url,
-                                                                      const std::string &local_uuid,
-                                                                      SyncFileActionMetadata::Action action,
-                                                                      util::Optional<std::string> new_name) const
+void SyncMetadataManager::make_file_action_metadata(StringData original_name,
+                                                    StringData url,
+                                                    StringData local_uuid,
+                                                    SyncFileActionMetadata::Action action,
+                                                    StringData new_name) const
 {
-    size_t raw_action = static_cast<size_t>(action);
-
-    // Open the Realm.
-    auto realm = Realm::get_shared_realm(m_metadata_config);
-    auto& schema = m_file_action_schema;
+    // This function can't use get_shared_realm() because it's called on a
+    // background thread and that's currently not supported by the libuv
+    // implementation of EventLoopSignal
+    std::unique_ptr<Replication> history;
+    std::unique_ptr<SharedGroup> shared_group;
+    std::unique_ptr<Group> read_only_group;
+    Realm::open_with_config(m_metadata_config, history, shared_group, read_only_group, nullptr);
 
     // Retrieve or create the row for this object.
-    TableRef table = ObjectStore::table_for_object_type(realm->read_group(), c_sync_fileActionMetadata);
-    realm->begin_transaction();
+    WriteTransaction wt(*shared_group);
+    TableRef table = ObjectStore::table_for_object_type(wt.get_group(), c_sync_fileActionMetadata);
+
+    auto& schema = m_file_action_schema;
     size_t row_idx = table->find_first_string(schema.idx_original_name, original_name);
     if (row_idx == not_found) {
         row_idx = table->add_empty_row();
         table->set_string(schema.idx_original_name, row_idx, original_name);
     }
     table->set_string(schema.idx_new_name, row_idx, new_name);
-    table->set_int(schema.idx_action, row_idx, raw_action);
+    table->set_int(schema.idx_action, row_idx, static_cast<int64_t>(action));
     table->set_string(schema.idx_url, row_idx, url);
     table->set_string(schema.idx_user_identity, row_idx, local_uuid);
-    realm->commit_transaction();
-    return SyncFileActionMetadata(schema, std::move(realm), table->get(row_idx));
+    wt.commit();
 }
 
-util::Optional<SyncFileActionMetadata> SyncMetadataManager::get_file_action_metadata(const std::string& original_name) const
+util::Optional<SyncFileActionMetadata> SyncMetadataManager::get_file_action_metadata(StringData original_name) const
 {
-    auto realm = Realm::get_shared_realm(m_metadata_config);
-    auto schema = m_file_action_schema;
+    auto realm = get_realm();
+    auto& schema = m_file_action_schema;
     TableRef table = ObjectStore::table_for_object_type(realm->read_group(), c_sync_fileActionMetadata);
     size_t row_idx = table->find_first_string(schema.idx_original_name, original_name);
     if (row_idx == not_found)
@@ -326,6 +312,13 @@ util::Optional<SyncFileActionMetadata> SyncMetadataManager::get_file_action_meta
     return SyncFileActionMetadata(std::move(schema), std::move(realm), table->get(row_idx));
 }
 
+std::shared_ptr<Realm> SyncMetadataManager::get_realm() const
+{
+    auto realm = Realm::get_shared_realm(m_metadata_config);
+    realm->refresh();
+    return realm;
+}
+
 // MARK: - Sync user metadata
 
 SyncUserMetadata::SyncUserMetadata(Schema schema, SharedRealm realm, RowExpr row)
diff --git a/Pods/Realm/Realm/ObjectStore/src/sync/partial_sync.cpp b/Pods/Realm/Realm/ObjectStore/src/sync/partial_sync.cpp
index e70d8ff..1b104c6 100644
--- a/Pods/Realm/Realm/ObjectStore/src/sync/partial_sync.cpp
+++ b/Pods/Realm/Realm/ObjectStore/src/sync/partial_sync.cpp
@@ -33,6 +33,85 @@
 #include <realm/lang_bind_helper.hpp>
 #include <realm/util/scope_exit.hpp>
 
+#include <cstdint>
+#include <limits>
+
+using namespace std::chrono;
+
+namespace {
+
+    // Delete all subscriptions that are no longer relevant.
+    // This method must be called within a write transaction.
+    void cleanup_subscriptions(realm::Group& group, realm::Timestamp now)
+    {
+        // Remove all subscriptions no longer considered "active"
+        // "inactive" is currently defined as any subscription with an `expires_at` < now()`
+        //
+        // Note, that we do not check if someone is actively using the subscription right now (this
+        // is also hard to get right). This does leave some loop holes where a subscription might be
+        // removed while still in use. E.g. consider a Kiosk app showing a screen 24/7 with a background
+        // job that accidentially triggers the cleanup codepath. This case is considered rare, but should
+        // still be documented.
+        auto table = realm::ObjectStore::table_for_object_type(group, realm::partial_sync::result_sets_type_name);
+
+        size_t expires_at_col_ndx = table->get_column_index(realm::partial_sync::property_expires_at);
+        realm::TableView results = table->where().less(expires_at_col_ndx, now).find_all();
+        results.clear(realm::RemoveMode::unordered);
+    }
+
+    // Calculates the expiry date, claming at the high end if a timestamp overflows
+    realm::Timestamp calculate_expiry_date(realm::Timestamp starting_time, int64_t user_ttl_ms)
+    {
+        auto tp = starting_time.get_time_point();
+        using time_point = decltype(tp);
+        milliseconds ttl(user_ttl_ms);
+        if (time_point::max() - ttl < tp)
+            return time_point::max();
+        return tp + ttl;
+    }
+
+    using namespace ::realm;
+    using namespace ::realm::partial_sync;
+    struct ParitalSyncProperty {
+        const char *name;
+        DataType type;
+        bool nullable;
+        bool indexed;
+    };
+
+    static constexpr const ParitalSyncProperty s_partial_sync_schema[] = {
+        {property_query, type_String, false, false},
+        {property_matches_property_name, type_String, false, false},
+        {property_status, type_Int, false, false},
+        {property_error_message, type_String, false, false},
+        {property_query_parse_counter, type_Int, false, false},
+
+        // Add columns not required by Sync, but used by the bindings to offer better tracking of subscriptions.
+        // These columns are not automatically added by the server, so we need to add them manually if needed.
+
+        // Name used to uniquely identify a subscription. If a name isn't provided for a subscription one will be
+        // autogenerated.
+        {property_name, type_String, false, true},
+
+        // Timestamp for when then the subscription is created. This should only be set the first time the subscription
+        // is created.
+        {property_created_at, type_Timestamp, false, false},
+
+        // Timestamp for when the subscription is either updated or someone resubscribes to it.
+        {property_updated_at, type_Timestamp, false, false},
+
+        // Relative time-to-live in milliseconds. This indicates the period from when a subscription was last updated
+        // to when it isn't considered valid anymore and can be safely deleted. Realm will attempt to perform this
+        // cleanup automatically either when the app is started or someone discards the subscription token for it.
+        {property_time_to_live, type_Int, true, false},  // null = infinite TTL
+
+        // Timestamp representing the fixed point in time when this subscription isn't valid anymore and can
+        // be safely deleted. This value should be considered read-only from the perspective of any Bindings
+        // and should never be modified by itself, but only updated whenever the `updatedAt` or `timefield is.
+        {property_expires_at, type_Timestamp, true, false},  // null = Subscription never expires
+    };
+}
+
 namespace realm {
 
 namespace _impl {
@@ -43,28 +122,52 @@ void initialize_schema(Group& group)
     std::string result_sets_table_name = ObjectStore::table_name_for_object_type(result_sets_type_name);
     TableRef table = group.get_table(result_sets_table_name);
     if (!table) {
+        // Create the schema required by Sync
         table = sync::create_table(group, result_sets_table_name);
-        table->add_column(type_String, "query");
-        table->add_column(type_String, "matches_property");
-        table->add_column(type_Int, "status");
-        table->add_column(type_String, "error_message");
-        table->add_column(type_Int, "query_parse_counter");
-    }
-    else {
-        // The table already existed, so it should have all of the columns that are in the shared schema.
-        REALM_ASSERT(table->get_column_index("query") != npos);
-        REALM_ASSERT(table->get_column_index("matches_property") != npos);
-        REALM_ASSERT(table->get_column_index("status") != npos);
-        REALM_ASSERT(table->get_column_index("error_message") != npos);
-        REALM_ASSERT(table->get_column_index("query_parse_counter") != npos);
     }
 
-    // We may need to add the "name" column even if the __ResultSets table already existed
-    // as it's not added by the server when it creates the table.
-    if (table->get_column_index("name") == npos) {
-        size_t idx = table->add_column(type_String, "name");
-        table->add_search_index(idx);
+    // Create all required properties which don't already exist
+    for (auto& property : s_partial_sync_schema) {
+        if (table->get_column_index(property.name) != npos)
+            continue;
+        size_t idx = table->add_column(property.type, property.name, property.nullable);
+        if (property.indexed)
+            table->add_search_index(idx);
     }
+
+    // Remove any subscriptions no longer relevant
+    cleanup_subscriptions(group, system_clock::now());
+}
+
+void ensure_partial_sync_schema_initialized(Realm& realm)
+{
+    auto was_in_read = realm.is_in_read_transaction();
+    auto cleanup = util::make_scope_exit([&]() noexcept {
+        if (realm.is_in_transaction())
+            realm.cancel_transaction();
+        if (!was_in_read)
+            realm.invalidate();
+    });
+
+    auto has_all_required_columns = [](auto& table) -> bool {
+        return std::all_of(std::begin(s_partial_sync_schema), std::end(s_partial_sync_schema),
+                           [&](auto& property) { return table.get_column_index(property.name) != npos; });
+    };
+
+    auto& group = realm.read_group();
+    // Check if the result sets table already has the expected number of columns
+    auto table = ObjectStore::table_for_object_type(group, result_sets_type_name);
+    if (table && has_all_required_columns(*table))
+        return;
+
+    realm.begin_transaction();
+    // Recheck after starting the transaction as it refreshes
+    if (!table)
+        table = ObjectStore::table_for_object_type(group, result_sets_type_name);
+    if (table && has_all_required_columns(*table))
+        return;
+    initialize_schema(group);
+    realm.commit_transaction();
 }
 
 // A stripped-down version of WriteTransaction that can promote an existing read transaction
@@ -93,7 +196,7 @@ class WriteTransactionNotifyingSync {
         auto version = m_shared_group->commit();
         m_shared_group = nullptr;
 
-        auto session = SyncManager::shared().get_session(m_config.path, *m_config.sync_config);
+        auto session = SyncManager::shared().get_session(m_config.path, *m_config.sync_config, false);
         SyncSession::Internal::nonsync_transact_notify(*session, version);
         return version;
     }
@@ -131,24 +234,25 @@ class PartialSyncHelper {
     }
 };
 
-struct RowHandover {
-    RowHandover(Realm& realm, Row row)
-    : source_shared_group(*PartialSyncHelper::get_shared_group(realm))
-    , row(source_shared_group.export_for_handover(std::move(row)))
-    , version(source_shared_group.pin_version())
-    {
-    }
-
-    ~RowHandover()
-    {
-        // If the row isn't already null we've not been imported and the version pin will leak.
-        REALM_ASSERT(!row);
-    }
+template<typename... Args>
+static auto export_for_handover(Realm& realm, Args&&... args)
+{
+    auto& sg = *PartialSyncHelper::get_shared_group(realm);
+    sg.pin_version();
+    auto handover = sg.export_for_handover(std::forward<Args>(args)...);
+    // We need to store the handover object in a shared_ptr because it's captured
+    // in a std::function<>, which requires copyable objects
+    return std::make_shared<decltype(handover)>(std::move(handover));
+}
 
-    SharedGroup& source_shared_group;
-    std::unique_ptr<SharedGroup::Handover<Row>> row;
-    VersionID version;
-};
+template<typename T>
+static auto import_from_handover(SharedGroup& sg, std::unique_ptr<SharedGroup::Handover<T>>& handover)
+{
+    sg.begin_read(handover->version);
+    auto obj = sg.import_from_handover(std::move(handover));
+    sg.unpin_version(sg.get_version_of_current_transaction());
+    return *obj;
+}
 
 } // namespace _impl
 
@@ -162,6 +266,10 @@ ExistingSubscriptionException::ExistingSubscriptionException(const std::string&
 : std::runtime_error(msg)
 {}
 
+QueryTypeMismatchException::QueryTypeMismatchException(const std::string& msg)
+: std::logic_error(msg)
+{}
+
 namespace {
 
 template<typename F>
@@ -178,51 +286,49 @@ void with_open_shared_group(Realm::Config const& config, F&& function)
 struct ResultSetsColumns {
     ResultSetsColumns(Table& table, std::string const& matches_property_name)
     {
-        name = table.get_column_index("name");
+        name = table.get_column_index(property_name);
         REALM_ASSERT(name != npos);
 
-        query = table.get_column_index("query");
+        query = table.get_column_index(property_query);
         REALM_ASSERT(query != npos);
 
-        this->matches_property_name = table.get_column_index("matches_property");
+        error_message = table.get_column_index(property_error_message);
+        REALM_ASSERT(error_message != npos);
+
+        status = table.get_column_index(property_status);
+        REALM_ASSERT(status != npos);
+
+        this->matches_property_name = table.get_column_index(property_matches_property_name);
         REALM_ASSERT(this->matches_property_name != npos);
 
+        created_at = table.get_column_index(property_created_at);
+        REALM_ASSERT(created_at != npos);
+
+        updated_at = table.get_column_index(property_updated_at);
+        REALM_ASSERT(updated_at != npos);
+
+        expires_at = table.get_column_index(property_expires_at);
+        REALM_ASSERT(expires_at != npos);
+
+        time_to_live = table.get_column_index(property_time_to_live);
+        REALM_ASSERT(time_to_live != npos);
+
         // This may be `npos` if the column does not yet exist.
         matches_property = table.get_column_index(matches_property_name);
     }
 
     size_t name;
     size_t query;
+    size_t error_message;
+    size_t status;
     size_t matches_property_name;
     size_t matches_property;
+    size_t created_at;
+    size_t updated_at;
+    size_t expires_at;
+    size_t time_to_live;
 };
 
-// Validate the subscription about to be created against existing subscription.
-// If an existing subscription already exists that matches the one  we are about to create, the
-// index of that Subscription is returned. If no current matching subscription exists `npos` is
-// returned.
-size_t validate_existing_subscription(Table& table, ResultSetsColumns const& columns, std::string const& name,
-                                      std::string const& query, std::string const& matches_property)
-{
-    auto existing_row_ndx = table.find_first_string(columns.name, name);
-    if (existing_row_ndx == npos)
-        return npos;
-
-    StringData existing_query = table.get_string(columns.query, existing_row_ndx);
-    if (existing_query != query)
-        throw ExistingSubscriptionException(util::format("An existing subscription exists with the same name, "
-                                                         "but a different query ('%1' vs '%2').",
-                                                         existing_query, query));
-
-    StringData existing_matches_property = table.get_string(columns.matches_property_name, existing_row_ndx);
-    if (existing_matches_property != matches_property)
-        throw ExistingSubscriptionException(util::format("An existing subscription exists with the same name, "
-                                                         "but a different result type ('%1' vs '%2').",
-                                                         existing_matches_property, matches_property));
-
-    return existing_row_ndx;
-}
-
 // Performs the logic of actually writing the subscription (if needed) to the Realm and making sure
 // that the `matches_property` field is setup correctly. This method will throw if the query cannot
 // be serialized or the name is already used by another subscription.
@@ -230,8 +336,14 @@ size_t validate_existing_subscription(Table& table, ResultSetsColumns const& col
 // The row of the resulting subscription is returned. If an old subscription exists that matches
 // the one about to be created, a new subscription is not created, but the old one is returned
 // instead.
-RowExpr write_subscription(std::string const& object_type, std::string const& name, std::string const& query, Group& group)
+//
+// If `update = true` and  if a subscription with `name` already exists, its query and time_to_live
+// will be updated instead of an exception being thrown if the query parsed in was different than
+// the persisted query.
+Row write_subscription(std::string const& object_type, std::string const& name, std::string const& query,
+        util::Optional<int64_t> time_to_live_ms, bool update, Group& group)
 {
+    Timestamp now = system_clock::now();
     auto matches_property = std::string(object_type) + "_matches";
 
     auto table = ObjectStore::table_for_object_type(group, result_sets_type_name);
@@ -241,32 +353,86 @@ RowExpr write_subscription(std::string const& object_type, std::string const& na
     if (columns.matches_property == npos) {
         auto target_table = ObjectStore::table_for_object_type(group, object_type);
         columns.matches_property = table->add_column_link(type_LinkList, matches_property, *target_table);
-    } else {
+    }
+    else {
         // FIXME: Validate that the column type and link target are correct.
     }
 
-    size_t row_ndx = validate_existing_subscription(*table, columns, name, query, matches_property);
-    if (row_ndx == npos) {
+    // Find existing subscription (if any)
+    auto row_ndx = table->find_first_string(columns.name, name);
+    if (row_ndx != npos) {
+
+        // Check that we don't attempt to replace an existing query with a query on a new type.
+        // There is nothing that prevents Sync from handling this, but allowing it will complicate
+        // Binding API's, so for now it is disallowed.
+        auto existing_matching_property = table->get_string(columns.matches_property_name, row_ndx);
+        if (existing_matching_property != matches_property) {
+            throw QueryTypeMismatchException(util::format("Replacing an existing query with a query on "
+                                                          "a different type is not allowed: %1 vs. %2 for %3",
+                                                          existing_matching_property, matches_property, name));
+        }
+
+        // If an subscription exist, we only update the query and TTL if allowed to.
+        // TODO: Consider how Binding API's are going to use this. It might make sense to disallow
+        // updating TTL using this API and instead require updates to TTL to go through a managed Subscription.
+        if (update) {
+            // If the query changed we must reset state to force the server to re-evaluate the subscription.
+            if (table->get_string(columns.query, row_ndx) != query) {
+                table->set_string(columns.error_message, row_ndx, "");
+                table->set_int(columns.status, row_ndx, 0);
+            }
+            table->set_string(columns.query, row_ndx, query);
+            table->set(columns.time_to_live, row_ndx, time_to_live_ms);
+        }
+        else {
+            StringData existing_query = table->get_string(columns.query, row_ndx);
+            if (existing_query != query)
+                throw ExistingSubscriptionException(util::format("An existing subscription exists with the name '%1' "
+                                                                 "but with a different query: '%1' vs '%2'",
+                                                                 name, existing_query, query));
+        }
+
+    }
+    else {
+        // No existing subscription was found. Create a new one
         row_ndx = sync::create_object(group, *table);
         table->set_string(columns.name, row_ndx, name);
         table->set_string(columns.query, row_ndx, query);
         table->set_string(columns.matches_property_name, row_ndx, matches_property);
+        table->set_timestamp(columns.created_at, row_ndx, now);
+        table->set(columns.time_to_live, row_ndx, time_to_live_ms);
+    }
+
+    // Always set updated_at/expires_at when a subscription is touched, no matter if it is new, updated or someone just
+    // resubscribes.
+    table->set_timestamp(columns.updated_at, row_ndx, now);
+    if (table->is_null(columns.time_to_live, row_ndx) || table->get_int(columns.time_to_live, row_ndx) == std::numeric_limits<int64_t>::max()) {
+        table->set_null(columns.expires_at, row_ndx);
+    }
+    else {
+        table->set_timestamp(columns.expires_at, row_ndx, calculate_expiry_date(now, table->get_int(columns.time_to_live, row_ndx)));
     }
-    return table->get(row_ndx);
+
+    // Fetch subscription first and return it. Cleanup needs to be performed after as it might delete subscription
+    // causing the row_ndx to change.
+    Row subscription = table->get(row_ndx);
+    cleanup_subscriptions(group, now);
+    return subscription;
 }
 
 void enqueue_registration(Realm& realm, std::string object_type, std::string query, std::string name,
+                          util::Optional<int64_t> time_to_live, bool update,
                           std::function<void(std::exception_ptr)> callback)
 {
     auto config = realm.config();
 
     auto& work_queue = _impl::PartialSyncHelper::get_coordinator(realm).partial_sync_work_queue();
     work_queue.enqueue([object_type=std::move(object_type), query=std::move(query), name=std::move(name),
-                        callback=std::move(callback), config=std::move(config)] {
+                        callback=std::move(callback), config=std::move(config), time_to_live=time_to_live, update=update] {
         try {
             with_open_shared_group(config, [&](SharedGroup& sg) {
                 _impl::WriteTransactionNotifyingSync write(config, sg);
-                write_subscription(object_type, name, query, write.get_group());
+                write_subscription(object_type, name, query, time_to_live, update, write.get_group());
                 write.commit();
             });
         } catch (...) {
@@ -285,18 +451,12 @@ void enqueue_unregistration(Object result_set, std::function<void()> callback)
     auto& work_queue = _impl::PartialSyncHelper::get_coordinator(*realm).partial_sync_work_queue();
 
     // Export a reference to the __ResultSets row so we can hand it to the worker thread.
-    // We store it in a shared_ptr as it would otherwise prevent the lambda from being copyable,
-    // which `std::function` requires.
-    auto handover = std::make_shared<_impl::RowHandover>(*realm, result_set.row());
+    auto handover = _impl::export_for_handover(*realm, Row(result_set.row()));
 
     work_queue.enqueue([handover=std::move(handover), callback=std::move(callback),
                         config=std::move(config)] () {
         with_open_shared_group(config, [&](SharedGroup& sg) {
-            // Import handed-over object.
-            sg.begin_read(handover->version);
-            Row row = *sg.import_from_handover(std::move(handover->row));
-            sg.unpin_version(handover->version);
-
+            Row row = _impl::import_from_handover(sg, *handover);
             _impl::WriteTransactionNotifyingSync write(config, sg);
             if (row.is_attached()) {
                 row.move_last_over();
@@ -310,6 +470,46 @@ void enqueue_unregistration(Object result_set, std::function<void()> callback)
     });
 }
 
+template<typename Notifier>
+void enqueue_unregistration(Results const& result_set, std::shared_ptr<Notifier> notifier,
+                            std::function<void()> callback)
+{
+    auto realm = result_set.get_realm();
+    auto config = realm->config();
+    auto& work_queue = _impl::PartialSyncHelper::get_coordinator(*realm).partial_sync_work_queue();
+
+    // Export a reference to the query which will match the __ResultSets row
+    // once it's created so we can hand it to the worker thread
+    Query q = result_set.get_query();
+    auto handover = _impl::export_for_handover(*realm, q, MutableSourcePayload::Move);
+
+    work_queue.enqueue([handover=std::move(handover), callback=std::move(callback),
+                        config=std::move(config), notifier=std::move(notifier)] () {
+        with_open_shared_group(config, [&](SharedGroup& sg) {
+            Query query = _impl::import_from_handover(sg, *handover);
+
+            // If creating the subscription failed there might be another
+            // pre-existing subscription which matches our query, so we need to
+            // not remove that
+            if (notifier->failed())
+                return;
+
+            _impl::WriteTransactionNotifyingSync write(config, sg);
+            size_t row = query.find();
+            if (row != npos) {
+                query.get_table()->move_last_over(row);
+                write.commit();
+            }
+            else {
+                // If unsubscribe() is called twice before the subscription is
+                // even created the row might already be gone
+                write.rollback();
+            }
+        });
+        callback();
+    });
+}
+
 std::string default_name_for_query(const std::string& query, const std::string& object_type)
 {
     return util::format("[%1] %2", object_type, query);
@@ -359,6 +559,7 @@ struct Subscription::Notifier : public _impl::CollectionNotifier {
             m_pending_error = error;
             m_pending_state = Complete;
             m_has_results_to_deliver = true;
+            m_failed = error != nullptr;
         }
 
         // Trigger processing of change notifications.
@@ -390,6 +591,12 @@ struct Subscription::Notifier : public _impl::CollectionNotifier {
         return m_state;
     }
 
+    bool failed() const
+    {
+        std::unique_lock<std::mutex> lock(m_mutex);
+        return m_failed;
+    }
+
 private:
     void do_attach_to(SharedGroup&) override { }
     void do_detach_from(SharedGroup&) override { }
@@ -400,7 +607,12 @@ struct Subscription::Notifier : public _impl::CollectionNotifier {
     }
 
     bool do_add_required_change_info(_impl::TransactionChangeInfo&) override { return false; }
-    bool prepare_to_deliver() override { return m_has_results_to_deliver; }
+    bool prepare_to_deliver() override
+    {
+        std::lock_guard<std::mutex> lock(m_mutex);
+        return m_has_results_to_deliver;
+
+    }
 
     _impl::RealmCoordinator *m_coordinator;
 
@@ -409,12 +621,13 @@ struct Subscription::Notifier : public _impl::CollectionNotifier {
     std::exception_ptr m_pending_error = nullptr;
     std::exception_ptr m_error = nullptr;
     bool m_has_results_to_deliver = false;
+    bool m_failed = false;
 
     State m_state = Creating;
     State m_pending_state = Creating;
 };
 
-Subscription subscribe(Results const& results, util::Optional<std::string> user_provided_name)
+Subscription subscribe(Results const& results, SubscriptionOptions options)
 {
     auto realm = results.get_realm();
 
@@ -423,14 +636,20 @@ Subscription subscribe(Results const& results, util::Optional<std::string> user_
         throw InvalidRealmStateException("A Subscription can only be created in a Query-based Realm.");
 
     auto query = results.get_query().get_description(); // Throws if the query cannot be serialized.
-    query += " " + results.get_descriptor_ordering().get_description(results.get_query().get_table());
+    if (!results.get_descriptor_ordering().is_empty()) {
+        query += " " + results.get_descriptor_ordering().get_description(results.get_query().get_table());
+    }
 
-    std::string name = user_provided_name ? std::move(*user_provided_name)
-                                          : default_name_for_query(query, results.get_object_type());
+    if (options.inclusions.is_valid()) {
+        query += " " + options.inclusions.get_description(results.get_query().get_table());
+    }
+
+    std::string name = options.user_provided_name ? std::move(*options.user_provided_name)
+                                                  : default_name_for_query(query, results.get_object_type());
 
     Subscription subscription(name, results.get_object_type(), realm);
     std::weak_ptr<Subscription::Notifier> weak_notifier = subscription.m_notifier;
-    enqueue_registration(*realm, results.get_object_type(), std::move(query), std::move(name),
+    enqueue_registration(*realm, results.get_object_type(), std::move(query), std::move(name), std::move(options.time_to_live_ms), options.update,
                          [weak_notifier=std::move(weak_notifier)](std::exception_ptr error) {
         if (auto notifier = weak_notifier.lock())
             notifier->finished_subscribing(error);
@@ -438,7 +657,8 @@ Subscription subscribe(Results const& results, util::Optional<std::string> user_
     return subscription;
 }
 
-RowExpr subscribe_blocking(Results const& results, util::Optional<std::string> user_provided_name)
+Row subscribe_blocking(Results const& results, util::Optional<std::string> user_provided_name,
+                       util::Optional<int64_t> time_to_live_ms, bool update)
 {
 
     auto realm = results.get_realm();
@@ -451,11 +671,12 @@ RowExpr subscribe_blocking(Results const& results, util::Optional<std::string> u
     }
 
     auto query = results.get_query().get_description(); // Throws if the query cannot be serialized.
-    query += " " + results.get_descriptor_ordering().get_description(results.get_query().get_table());
+    if (!results.get_descriptor_ordering().is_empty()) {
+        query += " " + results.get_descriptor_ordering().get_description(results.get_query().get_table());
+    }
     std::string name = user_provided_name ? std::move(*user_provided_name)
                                           : default_name_for_query(query, results.get_object_type());
-
-    return write_subscription(results.get_object_type(), name, query, realm->read_group());
+    return write_subscription(results.get_object_type(), name, query, time_to_live_ms, update, realm->read_group());
 }
 
 void unsubscribe(Subscription& subscription)
@@ -473,15 +694,10 @@ void unsubscribe(Subscription& subscription)
     switch (subscription.state()) {
         case SubscriptionState::Creating: {
             // The result set object is in the process of being created. Try unsubscribing again once it exists.
-            auto token = std::make_shared<SubscriptionNotificationToken>();
-            *token = subscription.add_notification_callback([token, &subscription] () {
-                if (subscription.state() == SubscriptionState::Creating)
-                    return;
-
-                unsubscribe(subscription);
-
-                // Invalidate the notification token so we do not receive further callbacks.
-                *token = SubscriptionNotificationToken();
+            std::weak_ptr<Subscription::Notifier> weak_notifier = subscription.m_notifier;
+            enqueue_unregistration(subscription.m_result_sets, subscription.m_notifier, [weak_notifier=std::move(weak_notifier)]() {
+                if (auto notifier = weak_notifier.lock())
+                    notifier->finished_unsubscribing();
             });
             return;
         }
@@ -525,10 +741,11 @@ Subscription::Subscription(std::string name, std::string object_type, std::share
 
     auto matches_property = std::string(object_type) + "_matches";
 
+    m_wrapper_created_at = system_clock::now();
     TableRef table = ObjectStore::table_for_object_type(realm->read_group(), result_sets_type_name);
     Query query = table->where();
-    query.equal(m_object_schema.property_for_name("name")->table_column, name);
-    query.equal(m_object_schema.property_for_name("matches_property")->table_column, matches_property);
+    query.equal(m_object_schema.property_for_name(property_name)->table_column, name);
+    query.equal(m_object_schema.property_for_name(property_matches_property_name)->table_column, matches_property);
     m_result_sets = Results(std::move(realm), std::move(query));
 }
 
@@ -538,12 +755,14 @@ Subscription& Subscription::operator=(Subscription&&) = default;
 
 SubscriptionNotificationToken Subscription::add_notification_callback(std::function<void ()> callback)
 {
-    auto result_sets_token = m_result_sets.add_notification_callback([callback] (CollectionChangeSet, std::exception_ptr) {
-        callback();
+    auto callback_wrapper = std::make_shared<SubscriptionCallbackWrapper>(SubscriptionCallbackWrapper{callback, none});
+    auto result_sets_token = m_result_sets.add_notification_callback([this, callback_wrapper] (CollectionChangeSet, std::exception_ptr) {
+        run_callback(*callback_wrapper);
     });
-    NotificationToken registration_token(m_notifier, m_notifier->add_callback([callback] (CollectionChangeSet, std::exception_ptr) {
-        callback();
+    NotificationToken registration_token(m_notifier, m_notifier->add_callback([this, callback_wrapper] (CollectionChangeSet, std::exception_ptr) {
+        run_callback(*callback_wrapper);
     }));
+
     return SubscriptionNotificationToken{std::move(registration_token), std::move(result_sets_token)};
 }
 
@@ -557,8 +776,68 @@ util::Optional<Object> Subscription::result_set_object() const
     return util::none;
 }
 
+void Subscription::run_callback(SubscriptionCallbackWrapper& callback_wrapper) {
+    // Store reference to underlying subscription object the first time we encounter it.
+    // Used to track if anyone is later deleting it.
+    if (!m_result_sets_object && m_result_sets.size() > 0) {
+        auto row = m_result_sets.first().value();
+        m_result_sets_object = util::Optional<Row>(row);
+    }
+
+    // Verify this is a state change we actually want to report to the user
+    auto new_state = state();
+    if (callback_wrapper.last_state && callback_wrapper.last_state.value() == new_state)
+        return;
+
+    callback_wrapper.last_state = util::Optional<SubscriptionState>(new_state);
+
+    // Finally trigger callback
+    callback_wrapper.callback();
+}
+
 SubscriptionState Subscription::state() const
 {
+    // State transitions are complex due to multiple source being able to create and modify the subscriptions.
+    // This means that there are unavoidable race conditions with regard to the states and we just make
+    // a best effort to provide a sensible experience for the end user.
+    //
+    // In particular this means the following:
+    //
+    // - There is no guarantee that a user will see all the states from `Creating -> Pending -> Complete`
+    //   They might only see `Pending -> Complete` or `Complete`
+    //
+    // What we do guarantee is:
+    //
+    // - States will never be reported twice in a row for the same callback. This could e.g. happen if some property
+    //   like `updated_at` was updated while the status was still `Pending`, but these properties are not important
+    //   until the subscription is actually created. So we intentionally swallow all duplicated state notifications.
+    //
+    // - When calling `subscribe()` with `update = true` we will never report `Complete` until the updated subscription
+    //   reaches that state.
+
+    // Errors take precedence over all other notifications
+    if (m_notifier->error())
+        return SubscriptionState::Error;
+
+    // In some cases the subscription already exists. In that case we just report the state of the __ResultSets object.
+    if (auto object = result_set_object()) {
+        CppContext context;
+        auto state = static_cast<SubscriptionState>(any_cast<int64_t>(object->get_property_value<util::Any>(context, property_status)));
+        auto updated_at = any_cast<Timestamp>(object->get_property_value<util::Any>(context, property_updated_at));
+
+        if (updated_at < m_wrapper_created_at) {
+            // If the `updated_at` property on an existing subscription wasn't updated after the wrapper was created,
+            // it meant the query callback triggered before the async write completed. In that case we don't want
+            // to return the state associated with the subscription before it was updated. So we override the state
+            // in the actual subscription and return the expected state after the update.
+            return partial_sync::SubscriptionState::Pending;
+        } else {
+            return state;
+        }
+    }
+
+    // If no existing subscription exist, we can use the state of the Notifier as an indication of the underlying
+    // progress.
     switch (m_notifier->state()) {
         case Notifier::Creating:
             return SubscriptionState::Creating;
@@ -568,13 +847,10 @@ SubscriptionState Subscription::state() const
             break;
     }
 
-    if (m_notifier->error())
-        return SubscriptionState::Error;
-
-    if (auto object = result_set_object()) {
-        CppContext context;
-        auto value = any_cast<int64_t>(object->get_property_value<util::Any>(context, "status"));
-        return (SubscriptionState)value;
+    // If we previously had a reference to the subscription and that is now gone, we interpret that as
+    // someone deleted the subscription (without using the explict unsubscribe API).
+    if (m_result_sets_object && !m_result_sets_object->is_attached()) {
+        return SubscriptionState::Invalidated;
     }
 
     // We may not have an object even if the subscription has completed if the completion callback fired
diff --git a/Pods/Realm/Realm/ObjectStore/src/sync/sync_manager.cpp b/Pods/Realm/Realm/ObjectStore/src/sync/sync_manager.cpp
index ffaa415..757e3b8 100644
--- a/Pods/Realm/Realm/ObjectStore/src/sync/sync_manager.cpp
+++ b/Pods/Realm/Realm/ObjectStore/src/sync/sync_manager.cpp
@@ -37,12 +37,15 @@ SyncManager& SyncManager::shared()
     return manager;
 }
 
-void SyncManager::configure(const std::string& base_file_path,
-                                        MetadataMode metadata_mode,
-                                        const std::string& user_agent_binding_info,
-                                        util::Optional<std::vector<char>> custom_encryption_key,
-                                        bool reset_metadata_on_error)
+void SyncManager::configure(SyncClientConfig config)
 {
+    {
+        std::lock_guard<std::mutex> lock(m_mutex);
+        m_config = std::move(config);
+        if (m_sync_client)
+            return;
+    }
+
     struct UserCreationData {
         std::string identity;
         std::string user_token;
@@ -50,51 +53,44 @@ void SyncManager::configure(const std::string& base_file_path,
         bool is_admin;
     };
 
-    m_user_agent_binding_info = user_agent_binding_info;
-
     std::vector<UserCreationData> users_to_add;
     {
         std::lock_guard<std::mutex> lock(m_file_system_mutex);
 
         // Set up the file manager.
         if (m_file_manager) {
-            REALM_ASSERT(m_file_manager->base_path() == base_file_path);
+            // Changing the base path for tests requires calling reset_for_testing()
+            // first, and otherwise isn't supported
+            REALM_ASSERT(m_file_manager->base_path() == m_config.base_file_path);
         } else {
-            m_file_manager = std::make_unique<SyncFileManager>(base_file_path);
+            m_file_manager = std::make_unique<SyncFileManager>(m_config.base_file_path);
         }
 
         // Set up the metadata manager, and perform initial loading/purging work.
-        if (m_metadata_manager) {
+        if (m_metadata_manager || m_config.metadata_mode == MetadataMode::NoMetadata) {
             return;
         }
-        switch (metadata_mode) {
-            case MetadataMode::NoEncryption:
+
+        bool encrypt = m_config.metadata_mode == MetadataMode::Encryption;
+        try {
+            m_metadata_manager = std::make_unique<SyncMetadataManager>(m_file_manager->metadata_path(),
+                                                                       encrypt,
+                                                                       m_config.custom_encryption_key);
+        } catch (RealmFileException const& ex) {
+            if (m_config.reset_metadata_on_error && m_file_manager->remove_metadata_realm()) {
                 m_metadata_manager = std::make_unique<SyncMetadataManager>(m_file_manager->metadata_path(),
-                                                                           false);
-                break;
-            case MetadataMode::Encryption:
-                try {
-                    m_metadata_manager = std::make_unique<SyncMetadataManager>(m_file_manager->metadata_path(),
-                                                                               true,
-                                                                               custom_encryption_key);
-                } catch (RealmFileException const& ex) {
-                    if (reset_metadata_on_error && m_file_manager->remove_metadata_realm()) {
-                        m_metadata_manager = std::make_unique<SyncMetadataManager>(m_file_manager->metadata_path(),
-                                                                                   true,
-                                                                                   std::move(custom_encryption_key));
-                    } else {
-                        throw;
-                    }
-                }
-                break;
-            case MetadataMode::NoMetadata:
-                return;
+                                                                           encrypt,
+                                                                           std::move(m_config.custom_encryption_key));
+            } else {
+                throw;
+            }
         }
 
         REALM_ASSERT(m_metadata_manager);
         m_client_uuid = m_metadata_manager->client_uuid();
 
-        // Perform any necessary file actions.
+        // Perform our "on next startup" actions such as deleting Realm files
+        // which we couldn't delete immediately due to them being in use
         std::vector<SyncFileActionMetadata> completed_actions;
         SyncFileActionMetadataResults file_actions = m_metadata_manager->all_pending_actions();
         for (size_t i = 0; i < file_actions.size(); i++) {
@@ -106,25 +102,22 @@ void SyncManager::configure(const std::string& base_file_path,
         for (auto& action : completed_actions) {
             action.remove();
         }
+
         // Load persisted users into the users map.
         SyncUserMetadataResults users = m_metadata_manager->all_unmarked_users();
         for (size_t i = 0; i < users.size(); i++) {
             // Note that 'admin' style users are not persisted.
             auto user_data = users.get(i);
-            auto user_token = user_data.user_token();
-            auto identity = user_data.identity();
-            auto server_url = user_data.auth_server_url();
-            bool is_admin = user_data.is_admin();
-            if (user_token) {
-                UserCreationData data = {
-                    std::move(identity),
+            if (auto user_token = user_data.user_token()) {
+                users_to_add.push_back(UserCreationData{
+                    user_data.identity(),
                     std::move(*user_token),
-                    std::move(server_url),
-                    is_admin,
-                };
-                users_to_add.emplace_back(std::move(data));
+                    user_data.auth_server_url(),
+                    user_data.is_admin()
+                });
             }
         }
+
         // Delete any users marked for death.
         std::vector<SyncUserMetadata> dead_users;
         SyncUserMetadataResults users_to_remove = m_metadata_manager->all_users_marked_for_removal();
@@ -218,13 +211,10 @@ void SyncManager::reset_for_testing()
 
         {
             std::lock_guard<std::mutex> lock(m_session_mutex);
-
-            // Callers of `SyncManager::reset_for_testing` should ensure there are no active sessions
+            // Callers of `SyncManager::reset_for_testing` should ensure there are no existing sessions
             // prior to calling `reset_for_testing`.
-            auto no_active_sessions = std::none_of(m_sessions.begin(), m_sessions.end(), [](auto& element){
-                return element.second->existing_external_reference();
-            });
-            REALM_ASSERT_RELEASE(no_active_sessions);
+            bool no_sessions = !do_has_existing_sessions();
+            REALM_ASSERT_RELEASE(no_sessions);
 
             // Destroy any inactive sessions.
             // FIXME: We shouldn't have any inactive sessions at this point! Sessions are expected to
@@ -238,30 +228,43 @@ void SyncManager::reset_for_testing()
         m_sync_client = nullptr;
 
         // Reset even more state.
-        // NOTE: these should always match the defaults.
-        m_log_level = util::Logger::Level::info;
-        m_logger_factory = nullptr;
-        m_client_reconnect_mode = ReconnectMode::normal;
-        m_multiplex_sessions = false;
+        m_config = {};
     }
 }
 
 void SyncManager::set_log_level(util::Logger::Level level) noexcept
 {
     std::lock_guard<std::mutex> lock(m_mutex);
-    m_log_level = level;
+    m_config.log_level = level;
 }
 
 void SyncManager::set_logger_factory(SyncLoggerFactory& factory) noexcept
 {
     std::lock_guard<std::mutex> lock(m_mutex);
-    m_logger_factory = &factory;
+    m_config.logger_factory = &factory;
+}
+
+std::unique_ptr<util::Logger> SyncManager::make_logger() const
+{
+    if (m_config.logger_factory) {
+        return m_config.logger_factory->make_logger(m_config.log_level); // Throws
+    }
+
+    auto stderr_logger = std::make_unique<util::StderrLogger>(); // Throws
+    stderr_logger->set_level_threshold(m_config.log_level);
+    return std::unique_ptr<util::Logger>(stderr_logger.release());
 }
 
 void SyncManager::set_user_agent(std::string user_agent)
 {
     std::lock_guard<std::mutex> lock(m_mutex);
-    m_user_agent_application_info = std::move(user_agent);
+    m_config.user_agent_application_info = std::move(user_agent);
+}
+
+void SyncManager::set_timeouts(SyncClientTimeouts timeouts)
+{
+    std::lock_guard<std::mutex> lock(m_mutex);
+    m_config.timeouts = timeouts;
 }
 
 void SyncManager::reconnect()
@@ -275,7 +278,7 @@ void SyncManager::reconnect()
 util::Logger::Level SyncManager::log_level() const noexcept
 {
     std::lock_guard<std::mutex> lock(m_mutex);
-    return m_log_level;
+    return m_config.log_level;
 }
 
 bool SyncManager::perform_metadata_update(std::function<void(const SyncMetadataManager&)> update_function) const
@@ -415,11 +418,11 @@ std::string SyncManager::path_for_realm(const SyncUser& user, const std::string&
     return m_file_manager->path(user.local_identity(), raw_realm_url);
 }
 
-std::string SyncManager::recovery_directory_path() const
+std::string SyncManager::recovery_directory_path(util::Optional<std::string> const& custom_dir_name) const
 {
     std::lock_guard<std::mutex> lock(m_file_system_mutex);
     REALM_ASSERT(m_file_manager);
-    return m_file_manager->recovery_directory_path();
+    return m_file_manager->recovery_directory_path(custom_dir_name);
 }
 
 std::shared_ptr<SyncSession> SyncManager::get_existing_active_session(const std::string& path) const
@@ -448,7 +451,7 @@ std::shared_ptr<SyncSession> SyncManager::get_existing_session(const std::string
     return nullptr;
 }
 
-std::shared_ptr<SyncSession> SyncManager::get_session(const std::string& path, const SyncConfig& sync_config)
+std::shared_ptr<SyncSession> SyncManager::get_session(const std::string& path, const SyncConfig& sync_config, bool force_client_resync)
 {
     auto& client = get_sync_client(); // Throws
 
@@ -458,7 +461,7 @@ std::shared_ptr<SyncSession> SyncManager::get_session(const std::string& path, c
         return session->external_reference();
     }
 
-    auto shared_session = SyncSession::create(client, path, sync_config);
+    auto shared_session = SyncSession::create(client, path, sync_config, force_client_resync);
     m_sessions[path] = shared_session;
 
     // Create the external reference immediately to ensure that the session will become
@@ -470,6 +473,19 @@ std::shared_ptr<SyncSession> SyncManager::get_session(const std::string& path, c
     return external_reference;
 }
 
+
+bool SyncManager::has_existing_sessions()
+{
+    std::lock_guard<std::mutex> lock(m_session_mutex);
+    return do_has_existing_sessions();
+}
+
+bool SyncManager::do_has_existing_sessions(){
+    return std::any_of(m_sessions.begin(), m_sessions.end(), [](auto& element){
+        return element.second->existing_external_reference();
+    });
+}
+
 void SyncManager::unregister_session(const std::string& path)
 {
     std::lock_guard<std::mutex> lock(m_session_mutex);
@@ -488,9 +504,13 @@ void SyncManager::unregister_session(const std::string& path)
 void SyncManager::enable_session_multiplexing()
 {
     std::lock_guard<std::mutex> lock(m_mutex);
+    if (m_config.multiplex_sessions)
+        return; // Already enabled, we can ignore
+
     if (m_sync_client)
         throw std::logic_error("Cannot enable session multiplexing after creating the sync client");
-    m_multiplex_sessions = true;
+
+    m_config.multiplex_sessions = true;
 }
 
 SyncClient& SyncManager::get_sync_client() const
@@ -504,19 +524,7 @@ SyncClient& SyncManager::get_sync_client() const
 std::unique_ptr<SyncClient> SyncManager::create_sync_client() const
 {
     REALM_ASSERT(!m_mutex.try_lock());
-
-    std::unique_ptr<util::Logger> logger;
-    if (m_logger_factory) {
-        logger = m_logger_factory->make_logger(m_log_level); // Throws
-    }
-    else {
-        auto stderr_logger = std::make_unique<util::StderrLogger>(); // Throws
-        stderr_logger->set_level_threshold(m_log_level);
-        logger = std::move(stderr_logger);
-    }
-
-    return std::make_unique<SyncClient>(std::move(logger), m_client_reconnect_mode, m_multiplex_sessions,
-                                        util::format("%1 %2", m_user_agent_binding_info, m_user_agent_application_info));
+    return std::make_unique<SyncClient>(make_logger(), m_config);
 }
 
 std::string SyncManager::client_uuid() const
diff --git a/Pods/Realm/Realm/ObjectStore/src/sync/sync_permission.cpp b/Pods/Realm/Realm/ObjectStore/src/sync/sync_permission.cpp
index d53dad0..4143bb9 100644
--- a/Pods/Realm/Realm/ObjectStore/src/sync/sync_permission.cpp
+++ b/Pods/Realm/Realm/ObjectStore/src/sync/sync_permission.cpp
@@ -258,7 +258,7 @@ void Permissions::perform_async_operation(const std::string& object_type,
 
     // Write the permission object.
     realm->begin_transaction();
-    auto raw = Object::create<util::Any>(context, realm, *realm->schema().find(object_type), std::move(props), false);
+    auto raw = Object::create<util::Any>(context, realm, *realm->schema().find(object_type), std::move(props));
     auto object = std::make_shared<_impl::NotificationWrapper<Object>>(std::move(raw));
     realm->commit_transaction();
 
diff --git a/Pods/Realm/Realm/ObjectStore/src/sync/sync_session.cpp b/Pods/Realm/Realm/ObjectStore/src/sync/sync_session.cpp
index 288362b..f75891c 100644
--- a/Pods/Realm/Realm/ObjectStore/src/sync/sync_session.cpp
+++ b/Pods/Realm/Realm/ObjectStore/src/sync/sync_session.cpp
@@ -109,12 +109,7 @@ struct SyncSession::State {
 
     // Register a handler to wait for sync session uploads, downloads, or synchronization.
     // PRECONDITION: the session state lock must be held at the time this method is called, until after it returns.
-    // Returns true iff the handler was registered, either immediately or placed in a queue for later registration.
-    virtual bool wait_for_completion(SyncSession&,
-                                     std::function<void(std::error_code)>,
-                                     SessionWaiterPointer) const {
-        return false;
-    }
+    virtual void wait_for_completion(SyncSession&, _impl::SyncProgressNotifier::NotifierType) const { }
 
     virtual void override_server(std::unique_lock<std::mutex>&, SyncSession&, std::string, int) const { }
 
@@ -152,12 +147,6 @@ struct sync_session_states::WaitingForAccessToken : public SyncSession::State {
         if (session.m_server_override)
             session.m_session->override_server(session.m_server_override->address, session.m_server_override->port);
 
-        // Register all the pending wait-for-completion blocks.
-        for (auto& package : session.m_completion_wait_packages) {
-            (*session.m_session.*package.waiter)(std::move(package.callback));
-        }
-        session.m_completion_wait_packages.clear();
-
         // Handle any deferred commit notification.
         if (session.m_deferred_commit_notification) {
             session.m_session->nonsync_transact_notify(*session.m_deferred_commit_notification);
@@ -212,14 +201,6 @@ struct sync_session_states::WaitingForAccessToken : public SyncSession::State {
         }
     }
 
-    bool wait_for_completion(SyncSession& session,
-                             std::function<void(std::error_code)> callback,
-                             SessionWaiterPointer waiter) const override
-    {
-        session.m_completion_wait_packages.push_back({ waiter, std::move(callback) });
-        return true;
-    }
-
     void override_server(std::unique_lock<std::mutex>&, SyncSession& session,
                          std::string address, int port) const override
     {
@@ -228,6 +209,17 @@ struct sync_session_states::WaitingForAccessToken : public SyncSession::State {
 };
 
 struct sync_session_states::Active : public SyncSession::State {
+    void enter_state(std::unique_lock<std::mutex>&, SyncSession& session) const override
+    {
+        // Register all the pending wait-for-completion blocks. This can
+        // potentially add a redundant callback if we're coming from the Dying
+        // state, but that's okay (we won't call the user callbacks twice).
+        if (!session.m_upload_completion_callbacks.empty())
+            session.add_completion_callback(_impl::SyncProgressNotifier::NotifierType::upload);
+        if (!session.m_download_completion_callbacks.empty())
+            session.add_completion_callback(_impl::SyncProgressNotifier::NotifierType::download);
+    }
+
     void refresh_access_token(std::unique_lock<std::mutex>&, SyncSession& session,
                               std::string access_token,
                               const util::Optional<std::string>&) const override
@@ -276,13 +268,10 @@ struct sync_session_states::Active : public SyncSession::State {
         }
     }
 
-    bool wait_for_completion(SyncSession& session,
-                             std::function<void(std::error_code)> callback,
-                             SessionWaiterPointer waiter) const override
+    void wait_for_completion(SyncSession& session, _impl::SyncProgressNotifier::NotifierType direction) const override
     {
         REALM_ASSERT(session.m_session);
-        (*session.m_session.*waiter)(std::move(callback));
-        return true;
+        session.add_completion_callback(direction);
     }
 
     void handle_reconnect(std::unique_lock<std::mutex>&, SyncSession& session) const override
@@ -344,13 +333,10 @@ struct sync_session_states::Dying : public SyncSession::State {
         session.advance_state(lock, inactive);
     }
 
-    bool wait_for_completion(SyncSession& session,
-                             std::function<void(std::error_code)> callback,
-                             SessionWaiterPointer waiter) const override
+    void wait_for_completion(SyncSession& session, _impl::SyncProgressNotifier::NotifierType direction) const override
     {
         REALM_ASSERT(session.m_session);
-        (*session.m_session.*waiter)(std::move(callback));
-        return true;
+        session.add_completion_callback(direction);
     }
 
     void override_server(std::unique_lock<std::mutex>&, SyncSession& session,
@@ -364,25 +350,30 @@ struct sync_session_states::Dying : public SyncSession::State {
 struct sync_session_states::Inactive : public SyncSession::State {
     void enter_state(std::unique_lock<std::mutex>& lock, SyncSession& session) const override
     {
-        auto completion_wait_packages = std::move(session.m_completion_wait_packages);
-        session.m_completion_wait_packages.clear();
+        // Manually set the disconnected state. Sync would also do this, but
+        // since the underlying SyncSession object already have been destroyed,
+        // we are not able to get the callback.
+        auto old_state = session.m_connection_state;
+        auto new_state = session.m_connection_state = SyncSession::ConnectionState::Disconnected;
+
+        auto download_waits = std::move(session.m_download_completion_callbacks);
+        auto upload_waits = std::move(session.m_upload_completion_callbacks);
+        session.m_download_completion_callbacks.clear();
+        session.m_upload_completion_callbacks.clear();
+
         session.m_session = nullptr;
         session.unregister(lock); // releases lock
 
         // Send notifications after releasing the lock to prevent deadlocks in the callback.
-
-        // Manually set the disconnected state. Sync would also do this, but since the underlying SyncSession object
-        // already have been destroyed, we are not able to get the callback.
-        SyncSession::ConnectionState old_state = session.connection_state();
-        session.m_connection_state = realm::sync::Session::ConnectionState::disconnected;
-        SyncSession::ConnectionState new_state = session.connection_state();
         if (old_state != new_state) {
             session.m_connection_change_notifier.invoke_callbacks(old_state, session.connection_state());
         }
 
         // Inform any queued-up completion handlers that they were cancelled.
-        for (auto& package : completion_wait_packages)
-            package.callback(util::error::operation_aborted);
+        for (auto& callback : download_waits)
+            callback(make_error_code(util::error::operation_aborted));
+        for (auto& callback : upload_waits)
+            callback(make_error_code(util::error::operation_aborted));
     }
 
     bool revive_if_needed(std::unique_lock<std::mutex>& lock, SyncSession& session) const override
@@ -391,19 +382,16 @@ struct sync_session_states::Inactive : public SyncSession::State {
         return true;
     }
 
-    bool wait_for_completion(SyncSession& session,
-                             std::function<void(std::error_code)> callback,
-                             SessionWaiterPointer waiter) const override
-    {
-        session.m_completion_wait_packages.push_back({ waiter, std::move(callback) });
-        return true;
-    }
-
     void override_server(std::unique_lock<std::mutex>&, SyncSession& session,
                          std::string address, int port) const override
     {
         session.m_server_override = SyncSession::ServerOverride{address, port};
     }
+
+    void close(std::unique_lock<std::mutex>& lock, SyncSession& session) const override
+    {
+        session.unregister(lock); // releases lock
+    }
 };
 
 
@@ -412,9 +400,10 @@ const SyncSession::State& SyncSession::State::active = Active();
 const SyncSession::State& SyncSession::State::dying = Dying();
 const SyncSession::State& SyncSession::State::inactive = Inactive();
 
-SyncSession::SyncSession(SyncClient& client, std::string realm_path, SyncConfig config)
+SyncSession::SyncSession(SyncClient& client, std::string realm_path, SyncConfig config, bool force_client_resync)
 : m_state(&State::inactive)
 , m_config(std::move(config))
+, m_force_client_resync(force_client_resync)
 , m_realm_path(std::move(realm_path))
 , m_client(client)
 {
@@ -436,15 +425,16 @@ SyncSession::SyncSession(SyncClient& client, std::string realm_path, SyncConfig
                       realm_config.encryption_key.begin());
         }
 
-        // FIXME: Opening a Realm only to discard it is relatively expensive. It may be preferable to have
-        // realm-sync open the Realm when the `sync::Session` is created since it can continue to use it.
-        Realm::get_shared_realm(realm_config); // Throws
+        std::unique_ptr<Replication> history;
+        std::unique_ptr<SharedGroup> shared_group;
+        std::unique_ptr<Group> read_only_group;
+        Realm::open_with_config(realm_config, history, shared_group, read_only_group, nullptr);
    }
 }
 
 std::string SyncSession::get_recovery_file_path()
 {
-    return util::reserve_unique_file_name(SyncManager::shared().recovery_directory_path(),
+    return util::reserve_unique_file_name(SyncManager::shared().recovery_directory_path(m_config.recovery_directory),
                                           util::create_timestamped_template("recovered_realm"));
 }
 
@@ -460,12 +450,11 @@ void SyncSession::update_error_and_mark_file_for_deletion(SyncError& error, Shou
     }
     using Action = SyncFileActionMetadata::Action;
     auto action = should_backup == ShouldBackup::yes ? Action::BackUpThenDeleteRealm : Action::DeleteRealm;
-    SyncManager::shared().perform_metadata_update([this,
-                                                   action,
+    SyncManager::shared().perform_metadata_update([this, action,
                                                    original_path=std::move(original_path),
                                                    recovery_path=std::move(recovery_path)](const auto& manager) {
-        manager.make_file_action_metadata(original_path, m_config.realm_url(), m_config.user->identity(),
-                                          action, std::move(recovery_path));
+        auto realm_url = m_config.realm_url();
+        manager.make_file_action_metadata(original_path, realm_url, m_config.user->identity(), action, recovery_path);
     });
 }
 
@@ -484,6 +473,42 @@ void SyncSession::handle_error(SyncError error)
         }
     }
 
+    if (error.is_client_reset_requested()) {
+        switch (m_config.client_resync_mode) {
+            case ClientResyncMode::Manual:
+                break;
+            case ClientResyncMode::DiscardLocal:
+            case ClientResyncMode::Recover: {
+                // Performing a client resync requires tearing down our current
+                // sync session and creating a new one with a forced client
+                // reset. This will result in session completion handlers firing
+                // when the old session is torn down, which we don't want as this
+                // is supposed to be transparent to the user.
+                //
+                // To avoid this, we need to do two things: move the completion
+                // handlers aside temporarily so that moving to the inactive
+                // state doesn't clear them, and track which sync::Session each
+                // completion notification came from so that we can ignore
+                // notifications from the old session.
+                {
+                    std::unique_lock<std::mutex> lock(m_state_mutex);
+                    m_force_client_resync = true;
+
+                    ++m_client_resync_counter;
+                    auto download_handlers = std::move(m_download_completion_callbacks);
+                    auto upload_handlers = std::move(m_upload_completion_callbacks);
+
+                    advance_state(lock, State::inactive);
+
+                    m_download_completion_callbacks = std::move(download_handlers);
+                    m_upload_completion_callbacks = std::move(upload_handlers);
+                }
+                revive_if_needed();
+                return;
+            }
+        }
+    }
+
     if (error_code.category() == realm::sync::protocol_error_category()) {
         using ProtocolError = realm::sync::ProtocolError;
         switch (static_cast<ProtocolError>(error_code.value())) {
@@ -510,6 +535,7 @@ void SyncSession::handle_error(SyncError error)
             case ProtocolError::bad_decompression:
             case ProtocolError::partial_sync_disabled:
             case ProtocolError::unsupported_session_feature:
+            case ProtocolError::transact_before_upload:
                 break;
             // Session errors
             case ProtocolError::session_closed:
@@ -531,7 +557,7 @@ void SyncSession::handle_error(SyncError error)
                 {
                     std::unique_lock<std::mutex> lock(m_state_mutex);
                     user_to_invalidate = user();
-                    cancel_pending_waits(lock);
+                    cancel_pending_waits(lock, error.error_code);
                 }
                 if (user_to_invalidate)
                     user_to_invalidate->invalidate();
@@ -542,11 +568,16 @@ void SyncSession::handle_error(SyncError error)
                 update_error_and_mark_file_for_deletion(error, ShouldBackup::no);
                 break;
             }
+            case ProtocolError::bad_client_file:
+            case ProtocolError::bad_client_file_ident:
             case ProtocolError::bad_origin_file_ident:
             case ProtocolError::bad_server_file_ident:
-            case ProtocolError::bad_client_file_ident:
             case ProtocolError::bad_server_version:
+            case ProtocolError::client_file_blacklisted:
             case ProtocolError::diverging_histories:
+            case ProtocolError::server_file_deleted:
+            case ProtocolError::user_blacklisted:
+            case ProtocolError::client_file_expired:
                 next_state = NextStateAfterError::inactive;
                 update_error_and_mark_file_for_deletion(error, ShouldBackup::yes);
                 break;
@@ -558,27 +589,36 @@ void SyncSession::handle_error(SyncError error)
             case ClientError::pong_timeout:
                 // Not real errors, don't need to be reported to the binding.
                 return;
-            case ClientError::bad_timestamp:
-            case ClientError::connect_timeout:
-            case ClientError::unknown_message:
-            case ClientError::bad_syntax:
-            case ClientError::limits_exceeded:
-            case ClientError::bad_session_ident:
-            case ClientError::bad_message_order:
-            case ClientError::bad_progress:
+            case ClientError::bad_changeset:
             case ClientError::bad_changeset_header_syntax:
             case ClientError::bad_changeset_size:
+            case ClientError::bad_client_file_ident:
+            case ClientError::bad_client_file_ident_salt:
+            case ClientError::bad_client_version:
+            case ClientError::bad_compression:
+            case ClientError::bad_error_code:
+            case ClientError::bad_file_ident:
+            case ClientError::bad_message_order:
             case ClientError::bad_origin_file_ident:
-            case ClientError::bad_server_version:
-            case ClientError::bad_changeset:
+            case ClientError::bad_progress:
+            case ClientError::bad_protocol_from_server:
             case ClientError::bad_request_ident:
-            case ClientError::bad_error_code:
-            case ClientError::bad_compression:
-            case ClientError::bad_client_version:
+            case ClientError::bad_server_version:
+            case ClientError::bad_session_ident:
+            case ClientError::bad_state_message:
+            case ClientError::bad_syntax:
+            case ClientError::bad_timestamp:
+            case ClientError::client_too_new_for_server:
+            case ClientError::client_too_old_for_server:
+            case ClientError::connect_timeout:
+            case ClientError::limits_exceeded:
+            case ClientError::protocol_mismatch:
             case ClientError::ssl_server_cert_rejected:
-            case ClientError::bad_file_ident:
-            case ClientError::bad_client_file_ident:
-            case ClientError::bad_client_file_ident_salt:
+            case ClientError::unknown_message:
+            case ClientError::missing_protocol_feature:
+            case ClientError::bad_serial_transact_status:
+            case ClientError::bad_object_id_substitutions:
+            case ClientError::http_tunnel_failed:
                 // Don't do anything special for these errors.
                 // Future functionality may require special-case handling for existing
                 // errors, or newly introduced error codes.
@@ -590,6 +630,10 @@ void SyncSession::handle_error(SyncError error)
     }
     switch (next_state) {
         case NextStateAfterError::none:
+            if (m_config.cancel_waits_on_nonfatal_error) {
+                std::unique_lock<std::mutex> lock(m_state_mutex);
+                cancel_pending_waits(lock, error.error_code);
+            }
             break;
         case NextStateAfterError::inactive: {
             std::unique_lock<std::mutex> lock(m_state_mutex);
@@ -598,7 +642,7 @@ void SyncSession::handle_error(SyncError error)
         }
         case NextStateAfterError::error: {
             std::unique_lock<std::mutex> lock(m_state_mutex);
-            cancel_pending_waits(lock);
+            cancel_pending_waits(lock, error.error_code);
             break;
         }
     }
@@ -607,15 +651,17 @@ void SyncSession::handle_error(SyncError error)
     }
 }
 
-void SyncSession::cancel_pending_waits(std::unique_lock<std::mutex>& lock)
+void SyncSession::cancel_pending_waits(std::unique_lock<std::mutex>& lock, std::error_code error)
 {
-    auto packages = std::move(m_completion_wait_packages);
+    auto download = std::move(m_download_completion_callbacks);
+    auto upload = std::move(m_upload_completion_callbacks);
     lock.unlock();
 
     // Inform any queued-up completion handlers that they were cancelled.
-    for (auto& package : packages) {
-        package.callback(util::error::operation_aborted);
-    }
+    for (auto& callback : download)
+        callback(error);
+    for (auto& callback : upload)
+        callback(error);
 }
 
 void SyncSession::handle_progress_update(uint64_t downloaded, uint64_t downloadable,
@@ -636,6 +682,7 @@ void SyncSession::create_sync_session()
     session_config.verify_servers_ssl_certificate = m_config.client_validate_ssl;
     session_config.ssl_trust_certificate_path = m_config.ssl_trust_certificate_path;
     session_config.ssl_verify_callback = m_config.ssl_verify_callback;
+    session_config.proxy_config = m_config.proxy_config;
     session_config.multiplex_ident = m_multiplex_identity;
 
     if (m_config.authorization_header_name) {
@@ -647,6 +694,17 @@ void SyncSession::create_sync_session()
         session_config.url_prefix = *m_config.url_prefix;
     }
 
+    if (m_force_client_resync) {
+        std::string metadata_dir = m_realm_path + ".resync";
+        util::try_make_dir(metadata_dir);
+
+        sync::Session::Config::ClientReset config;
+        config.metadata_dir = metadata_dir;
+        if (m_config.client_resync_mode != ClientResyncMode::Recover)
+            config.recover_local_changes = false;
+        session_config.client_reset_config = config;
+    }
+
     m_session = m_client.make_session(m_realm_path, std::move(session_config));
 
     // The next time we get a token, call `bind()` instead of `refresh()`.
@@ -676,14 +734,23 @@ void SyncSession::create_sync_session()
 
     // Sets up the connection state listener. This callback is used for both reporting errors as well as changes to the
     // connection state.
-    m_session->set_connection_state_change_listener([weak_self](realm::sync::Session::ConnectionState state, const realm::sync::Session::ErrorInfo* error) {
+    m_session->set_connection_state_change_listener([weak_self](sync::Session::ConnectionState state,
+                                                                const sync::Session::ErrorInfo* error) {
         // If the OS SyncSession object is destroyed, we ignore any events from the underlying Session as there is
         // nothing useful we can do with them.
         if (auto self = weak_self.lock()) {
-            ConnectionState last_state = self->connection_state();
-            self->m_connection_state = state;
-            ConnectionState new_state = self->connection_state();
-            self->m_connection_change_notifier.invoke_callbacks(last_state, new_state);
+            std::unique_lock<std::mutex> lock(self->m_state_mutex);
+            auto old_state = self->m_connection_state;
+            using cs = sync::Session::ConnectionState;
+            switch (state) {
+                case cs::disconnected: self->m_connection_state = ConnectionState::Disconnected; break;
+                case cs::connecting:   self->m_connection_state = ConnectionState::Connecting;   break;
+                case cs::connected:    self->m_connection_state = ConnectionState::Connected;    break;
+                default: REALM_UNREACHABLE();
+            }
+            auto new_state = self->m_connection_state;
+            lock.unlock();
+            self->m_connection_change_notifier.invoke_callbacks(old_state, new_state);
             if (error) {
                 self->handle_error(SyncError{error->error_code, std::move(error->detailed_message), error->is_fatal});
             }
@@ -751,16 +818,47 @@ void SyncSession::unregister(std::unique_lock<std::mutex>& lock)
     SyncManager::shared().unregister_session(m_realm_path);
 }
 
-bool SyncSession::wait_for_upload_completion(std::function<void(std::error_code)> callback)
+void SyncSession::add_completion_callback(_impl::SyncProgressNotifier::NotifierType direction)
+{
+    bool is_download = direction == _impl::SyncProgressNotifier::NotifierType::download;
+
+    int resync_counter = m_client_resync_counter;
+    std::weak_ptr<SyncSession> weak_self = shared_from_this();
+    auto waiter = is_download ? &sync::Session::async_wait_for_download_completion
+                              : &sync::Session::async_wait_for_upload_completion;
+    (m_session.get()->*waiter)([resync_counter, weak_self, is_download](std::error_code ec) {
+        auto self = weak_self.lock();
+        if (!self)
+            return;
+        std::unique_lock<std::mutex> lock(self->m_state_mutex);
+        if (resync_counter != self->m_client_resync_counter) {
+            // This callback was registered on a previous sync session and not
+            // the current one, so we want to simply discard completion
+            // notifications from it
+            return;
+        }
+        auto callbacks = std::move(is_download ? self->m_download_completion_callbacks
+                                               : self->m_upload_completion_callbacks);
+        lock.unlock();
+        for (auto& callback : callbacks)
+            callback(ec);
+    });
+}
+
+void SyncSession::wait_for_upload_completion(std::function<void(std::error_code)> callback)
 {
     std::unique_lock<std::mutex> lock(m_state_mutex);
-    return m_state->wait_for_completion(*this, std::move(callback), &sync::Session::async_wait_for_upload_completion);
+    if (m_upload_completion_callbacks.empty())
+        m_state->wait_for_completion(*this, _impl::SyncProgressNotifier::NotifierType::upload);
+    m_upload_completion_callbacks.push_back(std::move(callback));
 }
 
-bool SyncSession::wait_for_download_completion(std::function<void(std::error_code)> callback)
+void SyncSession::wait_for_download_completion(std::function<void(std::error_code)> callback)
 {
     std::unique_lock<std::mutex> lock(m_state_mutex);
-    return m_state->wait_for_completion(*this, std::move(callback), &sync::Session::async_wait_for_download_completion);
+    if (m_download_completion_callbacks.empty())
+        m_state->wait_for_completion(*this, _impl::SyncProgressNotifier::NotifierType::download);
+    m_download_completion_callbacks.push_back(std::move(callback));
 }
 
 uint64_t SyncSession::register_progress_notifier(std::function<SyncProgressNotifierCallback> notifier,
@@ -805,6 +903,10 @@ void SyncSession::set_multiplex_identifier(std::string multiplex_identity)
     m_multiplex_identity = std::move(multiplex_identity);
 }
 
+void SyncSession::set_url_prefix(std::string url_prefix)
+{
+    m_config.url_prefix = std::move(url_prefix);
+}
 
 SyncSession::PublicState SyncSession::get_public_state() const
 {
@@ -822,7 +924,6 @@ SyncSession::PublicState SyncSession::get_public_state() const
     REALM_UNREACHABLE();
 }
 
-
 SyncSession::PublicState SyncSession::state() const
 {
     std::unique_lock<std::mutex> lock(m_state_mutex);
@@ -831,13 +932,33 @@ SyncSession::PublicState SyncSession::state() const
 
 SyncSession::ConnectionState SyncSession::connection_state() const
 {
-    switch (m_connection_state) {
-        case realm::sync::Session::ConnectionState::disconnected: return ConnectionState::Disconnected;
-        case realm::sync::Session::ConnectionState::connecting: return ConnectionState::Connecting;
-        case realm::sync::Session::ConnectionState::connected: return ConnectionState::Connected;
-        default:
-            REALM_UNREACHABLE();
+    std::unique_lock<std::mutex> lock(m_state_mutex);
+    return m_connection_state;
+}
+
+void SyncSession::update_configuration(SyncConfig new_config)
+{
+    while (true) {
+        std::unique_lock<std::mutex> lock(m_state_mutex);
+        if (m_state != &State::inactive) {
+            // Changing the state releases the lock, which means that by the
+            // time we reacquire the lock the state may have changed again
+            // (either due to one of the callbacks being invoked or another
+            // thread coincidentally doing something). We just attempt to keep
+            // switching it to inactive until it stays there.
+            advance_state(lock, State::inactive);
+            continue;
+        }
+
+        REALM_ASSERT(m_state == &State::inactive);
+        REALM_ASSERT(!m_session);
+        REALM_ASSERT(m_config.user == new_config.user);
+        REALM_ASSERT(m_config.reference_realm_url == new_config.reference_realm_url);
+        REALM_ASSERT(m_config.is_partial == new_config.is_partial);
+        m_config = std::move(new_config);
+        break;
     }
+    revive_if_needed();
 }
 
 // Represents a reference to the SyncSession from outside of the sync subsystem.
diff --git a/Pods/Realm/Realm/RLMAccessor.mm b/Pods/Realm/Realm/RLMAccessor.mm
index 818f857..48a288a 100644
--- a/Pods/Realm/Realm/RLMAccessor.mm
+++ b/Pods/Realm/Realm/RLMAccessor.mm
@@ -114,7 +114,7 @@ void setValue(__unsafe_unretained RLMObjectBase *const obj, NSUInteger colIndex,
         return;
     }
 
-    RLMAddObjectToRealm(val, obj->_realm, false);
+    RLMAddObjectToRealm(val, obj->_realm, RLMUpdatePolicyError);
 
     // make sure it is the correct type
     if (val->_row.get_table() != obj->_row.get_table()->get_link_target(colIndex)) {
@@ -143,8 +143,10 @@ void setValue(__unsafe_unretained RLMObjectBase *const obj, NSUInteger colIndex,
     if (list.get_type() == realm::PropertyType::Object) {
         info = &obj->_info->linkTargetType(prop.index);
     }
-    RLMAccessorContext ctx(obj->_realm, *info);
-    translateError([&] { list.assign(ctx, value, false); });
+    RLMAccessorContext ctx(*info);
+    translateError([&] {
+        list.assign(ctx, value, realm::CreatePolicy::ForceCreate);
+    });
 }
 
 void setValue(__unsafe_unretained RLMObjectBase *const obj, NSUInteger colIndex,
@@ -550,7 +552,7 @@ void RLMDynamicSet(__unsafe_unretained RLMObjectBase *const obj,
     realm::Object o(obj->_info->realm->_realm, *obj->_info->objectSchema, obj->_row);
     RLMAccessorContext c(obj);
     translateError([&] {
-        o.set_property_value(c, prop.columnName.UTF8String, val ?: NSNull.null, false);
+        o.set_property_value(c, prop.columnName.UTF8String, val ?: NSNull.null);
     });
 }
 
@@ -564,20 +566,12 @@ id RLMDynamicGet(__unsafe_unretained RLMObjectBase *const obj, __unsafe_unretain
 }
 
 id RLMDynamicGetByName(__unsafe_unretained RLMObjectBase *const obj,
-                       __unsafe_unretained NSString *const propName, bool asList) {
+                       __unsafe_unretained NSString *const propName) {
     RLMProperty *prop = obj->_objectSchema[propName];
     if (!prop) {
         @throw RLMException(@"Invalid property name '%@' for class '%@'.",
                             propName, obj->_objectSchema.className);
     }
-    if (asList && prop.array && prop.swiftIvar) {
-        RLMListBase *list = object_getIvar(obj, prop.swiftIvar);
-        if (prop.type != RLMPropertyTypeLinkingObjects && !list._rlmArray) {
-            list._rlmArray = RLMDynamicGet(obj, prop);
-        }
-        return list;
-    }
-
     return RLMDynamicGet(obj, prop);
 }
 
@@ -588,8 +582,8 @@ id RLMDynamicGetByName(__unsafe_unretained RLMObjectBase *const obj,
 {
 }
 
-RLMAccessorContext::RLMAccessorContext(RLMRealm *realm, RLMClassInfo& info, bool promote)
-: _realm(realm), _info(info), _promote_existing(promote)
+RLMAccessorContext::RLMAccessorContext(RLMClassInfo& info, bool promote)
+: _realm(info.realm), _info(info), _promote_existing(promote)
 {
 }
 
@@ -627,11 +621,6 @@ id RLMDynamicGetByName(__unsafe_unretained RLMObjectBase *const obj,
         if (prop.array) {
             return static_cast<RLMListBase *>(object_getIvar(obj, prop.swiftIvar))._rlmArray;
         }
-        else if (prop.swiftIvar == RLMDummySwiftIvar) {
-            // FIXME: An invalid property which we're pretending is nil until 4.0
-            // https://github.com/realm/realm-cocoa/issues/5784
-            return NSNull.null;
-        }
         else { // optional
             value = RLMGetOptional(static_cast<RLMOptionalBase *>(object_getIvar(obj, prop.swiftIvar)));
         }
@@ -647,18 +636,18 @@ id RLMDynamicGetByName(__unsafe_unretained RLMObjectBase *const obj,
 id RLMAccessorContext::box(realm::List&& l) {
     REALM_ASSERT(_parentObject);
     REALM_ASSERT(currentProperty);
-    return [[RLMManagedArray alloc] initWithList:std::move(l) realm:_realm
+    return [[RLMManagedArray alloc] initWithList:std::move(l)
                                       parentInfo:_parentObject->_info
                                         property:currentProperty];
 }
 
 id RLMAccessorContext::box(realm::Object&& o) {
     REALM_ASSERT(currentProperty);
-    return RLMCreateObjectAccessor(_realm, _info.linkTargetType(currentProperty.index), o.row());
+    return RLMCreateObjectAccessor(_info.linkTargetType(currentProperty.index), o.row());
 }
 
 id RLMAccessorContext::box(realm::RowExpr r) {
-    return RLMCreateObjectAccessor(_realm, _info, r);
+    return RLMCreateObjectAccessor(_info, r);
 }
 
 id RLMAccessorContext::box(realm::Results&& r) {
@@ -668,34 +657,34 @@ id RLMDynamicGetByName(__unsafe_unretained RLMObjectBase *const obj,
 }
 
 template<>
-realm::Timestamp RLMAccessorContext::unbox(__unsafe_unretained id const value, bool, bool, bool, size_t) {
+realm::Timestamp RLMAccessorContext::unbox(__unsafe_unretained id const value, realm::CreatePolicy, size_t) {
     id v = RLMCoerceToNil(value);
     return RLMTimestampForNSDate(v);
 }
 
 template<>
-bool RLMAccessorContext::unbox(__unsafe_unretained id const v, bool, bool, bool, size_t) {
+bool RLMAccessorContext::unbox(__unsafe_unretained id const v, realm::CreatePolicy, size_t) {
     return [v boolValue];
 }
 template<>
-double RLMAccessorContext::unbox(__unsafe_unretained id const v, bool, bool, bool, size_t) {
+double RLMAccessorContext::unbox(__unsafe_unretained id const v, realm::CreatePolicy, size_t) {
     return [v doubleValue];
 }
 template<>
-float RLMAccessorContext::unbox(__unsafe_unretained id const v, bool, bool, bool, size_t) {
+float RLMAccessorContext::unbox(__unsafe_unretained id const v, realm::CreatePolicy, size_t) {
     return [v floatValue];
 }
 template<>
-long long RLMAccessorContext::unbox(__unsafe_unretained id const v, bool, bool, bool, size_t) {
+long long RLMAccessorContext::unbox(__unsafe_unretained id const v, realm::CreatePolicy, size_t) {
     return [v longLongValue];
 }
 template<>
-realm::BinaryData RLMAccessorContext::unbox(id v, bool, bool, bool, size_t) {
+realm::BinaryData RLMAccessorContext::unbox(id v, realm::CreatePolicy, size_t) {
     v = RLMCoerceToNil(v);
     return RLMBinaryDataForNSData(v);
 }
 template<>
-realm::StringData RLMAccessorContext::unbox(id v, bool, bool, bool, size_t) {
+realm::StringData RLMAccessorContext::unbox(id v, realm::CreatePolicy, size_t) {
     v = RLMCoerceToNil(v);
     return RLMStringDataWithNSString(v);
 }
@@ -707,29 +696,31 @@ static auto to_optional(__unsafe_unretained id const value, Fn&& fn) {
 }
 
 template<>
-realm::util::Optional<bool> RLMAccessorContext::unbox(__unsafe_unretained id const v, bool, bool, bool, size_t) {
+realm::util::Optional<bool> RLMAccessorContext::unbox(__unsafe_unretained id const v, realm::CreatePolicy, size_t) {
     return to_optional(v, [&](__unsafe_unretained id v) { return (bool)[v boolValue]; });
 }
 template<>
-realm::util::Optional<double> RLMAccessorContext::unbox(__unsafe_unretained id const v, bool, bool, bool, size_t) {
+realm::util::Optional<double> RLMAccessorContext::unbox(__unsafe_unretained id const v, realm::CreatePolicy, size_t) {
     return to_optional(v, [&](__unsafe_unretained id v) { return [v doubleValue]; });
 }
 template<>
-realm::util::Optional<float> RLMAccessorContext::unbox(__unsafe_unretained id const v, bool, bool, bool, size_t) {
+realm::util::Optional<float> RLMAccessorContext::unbox(__unsafe_unretained id const v, realm::CreatePolicy, size_t) {
     return to_optional(v, [&](__unsafe_unretained id v) { return [v floatValue]; });
 }
 template<>
-realm::util::Optional<int64_t> RLMAccessorContext::unbox(__unsafe_unretained id const v, bool, bool, bool, size_t) {
+realm::util::Optional<int64_t> RLMAccessorContext::unbox(__unsafe_unretained id const v, realm::CreatePolicy, size_t) {
     return to_optional(v, [&](__unsafe_unretained id v) { return [v longLongValue]; });
 }
 
 template<>
-realm::RowExpr RLMAccessorContext::unbox(__unsafe_unretained id const v, bool create, bool update, bool, size_t) {
+realm::RowExpr RLMAccessorContext::unbox(__unsafe_unretained id const v, realm::CreatePolicy createPolicy, size_t) {
+    bool create = createPolicy != realm::CreatePolicy::Skip;
+    auto policy = static_cast<RLMUpdatePolicy>(createPolicy);
     RLMObjectBase *link = RLMDynamicCast<RLMObjectBase>(v);
     if (!link) {
         if (!create)
             return realm::RowExpr();
-        return RLMCreateObjectInRealmWithValue(_realm, _info.rlmObjectSchema.className, v, update)->_row;
+        return RLMCreateObjectInRealmWithValue(_realm, _info.rlmObjectSchema.className, v, policy)->_row;
     }
 
     if (link.isInvalidated) {
@@ -743,7 +734,7 @@ static auto to_optional(__unsafe_unretained id const value, Fn&& fn) {
 
     if (![link->_objectSchema.className isEqualToString:_info.rlmObjectSchema.className]) {
         if (create && !_promote_existing)
-            return RLMCreateObjectInRealmWithValue(_realm, _info.rlmObjectSchema.className, link, update)->_row;
+            return RLMCreateObjectInRealmWithValue(_realm, _info.rlmObjectSchema.className, link, policy)->_row;
         return link->_row;
     }
 
@@ -751,13 +742,13 @@ static auto to_optional(__unsafe_unretained id const value, Fn&& fn) {
         if (!create)
             return realm::RowExpr();
         if (!_promote_existing)
-            return RLMCreateObjectInRealmWithValue(_realm, _info.rlmObjectSchema.className, link, update)->_row;
-        RLMAddObjectToRealm(link, _realm, update);
+            return RLMCreateObjectInRealmWithValue(_realm, _info.rlmObjectSchema.className, link, policy)->_row;
+        RLMAddObjectToRealm(link, _realm, policy);
     }
     else if (link->_realm != _realm) {
         if (_promote_existing)
             @throw RLMException(@"Object is already managed by another Realm. Use create instead to copy it into this Realm.");
-        return RLMCreateObjectInRealmWithValue(_realm, _info.rlmObjectSchema.className, v, update)->_row;
+        return RLMCreateObjectInRealmWithValue(_realm, _info.rlmObjectSchema.className, v, policy)->_row;
     }
     return link->_row;
 }
@@ -809,3 +800,9 @@ static auto to_optional(__unsafe_unretained id const value, Fn&& fn) {
 bool RLMAccessorContext::is_same_list(realm::List const& list, __unsafe_unretained id const v) const noexcept {
     return [v respondsToSelector:@selector(isBackedByList:)] && [v isBackedByList:list];
 }
+
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wincomplete-implementation"
+@implementation RLMManagedPropertyAccessor
+@end
+#pragma clang diagnostic pop
diff --git a/Pods/Realm/Realm/RLMAnalytics.mm b/Pods/Realm/Realm/RLMAnalytics.mm
index b6d750a..b1cd5ac 100644
--- a/Pods/Realm/Realm/RLMAnalytics.mm
+++ b/Pods/Realm/Realm/RLMAnalytics.mm
@@ -72,7 +72,9 @@
 #import "RLMVersion.h"
 #endif
 
+#if REALM_ENABLE_SYNC
 #import <realm/sync/version.hpp>
+#endif
 
 // Declared for RealmSwiftObjectUtil
 @interface NSObject (SwiftVersion)
@@ -199,7 +201,9 @@ static auto RLMSysCtl(int *mib, u_int mibSize, size_t *bufferSize) {
                      @"Binding": @"cocoa",
                      @"Language": isSwift ? @"swift" : @"objc",
                      @"Realm Version": REALM_COCOA_VERSION,
+#if REALM_ENABLE_SYNC
                      @"Sync Version": @(REALM_SYNC_VER_STRING),
+#endif
 #if TARGET_OS_WATCH
                      @"Target OS Type": @"watchos",
 #elif TARGET_OS_TV
diff --git a/Pods/Realm/Realm/RLMCollection.mm b/Pods/Realm/Realm/RLMCollection.mm
index 360789a..b7e68ae 100644
--- a/Pods/Realm/Realm/RLMCollection.mm
+++ b/Pods/Realm/Realm/RLMCollection.mm
@@ -54,44 +54,42 @@ @implementation RLMFastEnumerator {
 
 - (instancetype)initWithList:(realm::List&)list
                   collection:(id)collection
-                       realm:(RLMRealm *)realm
                    classInfo:(RLMClassInfo&)info
 {
     self = [super init];
     if (self) {
-        if (realm.inWriteTransaction) {
+        _info = &info;
+        _realm = _info->realm;
+        if (_realm.inWriteTransaction) {
             _snapshot = list.snapshot();
         }
         else {
             _snapshot = list.as_results();
             _collection = collection;
-            [realm registerEnumerator:self];
+            [_realm registerEnumerator:self];
         }
         _results = &_snapshot;
-        _realm = realm;
-        _info = &info;
     }
     return self;
 }
 
 - (instancetype)initWithResults:(realm::Results&)results
                      collection:(id)collection
-                          realm:(RLMRealm *)realm
                       classInfo:(RLMClassInfo&)info
 {
     self = [super init];
     if (self) {
-        if (realm.inWriteTransaction) {
+        _info = &info;
+        _realm = _info->realm;
+        if (_realm.inWriteTransaction) {
             _snapshot = results.snapshot();
             _results = &_snapshot;
         }
         else {
             _results = &results;
             _collection = collection;
-            [realm registerEnumerator:self];
+            [_realm registerEnumerator:self];
         }
-        _realm = realm;
-        _info = &info;
     }
     return self;
 }
@@ -124,7 +122,7 @@ - (NSUInteger)countByEnumeratingWithState:(NSFastEnumerationState *)state
     NSUInteger batchCount = 0, count = state->extra[1];
 
     @autoreleasepool {
-        RLMAccessorContext ctx(_realm, *_info);
+        RLMAccessorContext ctx(*_info);
         for (NSUInteger index = state->state; index < count && batchCount < len; ++index) {
             _strongBuffer[batchCount] = _results->get(ctx, index);
             batchCount++;
@@ -168,8 +166,7 @@ NSUInteger RLMFastEnumerate(NSFastEnumerationState *state, NSUInteger len, id<RL
 }
 
 template<typename Collection>
-NSArray *RLMCollectionValueForKey(Collection& collection, NSString *key,
-                                  RLMRealm *realm, RLMClassInfo& info) {
+NSArray *RLMCollectionValueForKey(Collection& collection, NSString *key, RLMClassInfo& info) {
     size_t count = collection.size();
     if (count == 0) {
         return @[];
@@ -177,7 +174,7 @@ NSUInteger RLMFastEnumerate(NSFastEnumerationState *state, NSUInteger len, id<RL
 
     NSMutableArray *array = [NSMutableArray arrayWithCapacity:count];
     if ([key isEqualToString:@"self"]) {
-        RLMAccessorContext context(realm, info);
+        RLMAccessorContext context(info);
         for (size_t i = 0; i < count; ++i) {
             [array addObject:collection.get(context, i) ?: NSNull.null];
         }
@@ -185,14 +182,14 @@ NSUInteger RLMFastEnumerate(NSFastEnumerationState *state, NSUInteger len, id<RL
     }
 
     if (collection.get_type() != realm::PropertyType::Object) {
-        RLMAccessorContext context(realm, info);
+        RLMAccessorContext context(info);
         for (size_t i = 0; i < count; ++i) {
             [array addObject:[collection.get(context, i) valueForKey:key] ?: NSNull.null];
         }
         return array;
     }
 
-    RLMObject *accessor = RLMCreateManagedAccessor(info.rlmObjectSchema.accessorClass, realm, &info);
+    RLMObject *accessor = RLMCreateManagedAccessor(info.rlmObjectSchema.accessorClass, &info);
 
     // List properties need to be handled specially since we need to create a
     // new List each time
@@ -203,13 +200,13 @@ NSUInteger RLMFastEnumerate(NSFastEnumerationState *state, NSUInteger len, id<RL
             // so that we can make instances of the List without creating a new
             // object accessor each time
             Class cls = [object_getIvar(accessor, prop.swiftIvar) class];
-            RLMAccessorContext context(realm, info);
+            RLMAccessorContext context(info);
             for (size_t i = 0; i < count; ++i) {
                 RLMListBase *list = [[cls alloc] init];
-                list._rlmArray = [[RLMManagedArray alloc] initWithList:realm::List(realm->_realm, *info.table(),
+                list._rlmArray = [[RLMManagedArray alloc] initWithList:realm::List(info.realm->_realm, *info.table(),
                                                                                    info.tableColumn(prop),
                                                                                    collection.get(i).get_index())
-                                                                 realm:realm parentInfo:&info
+                                                            parentInfo:&info
                                                               property:prop];
                 [array addObject:list];
             }
@@ -225,8 +222,8 @@ NSUInteger RLMFastEnumerate(NSFastEnumerationState *state, NSUInteger len, id<RL
     return array;
 }
 
-template NSArray *RLMCollectionValueForKey(realm::Results&, NSString *, RLMRealm *, RLMClassInfo&);
-template NSArray *RLMCollectionValueForKey(realm::List&, NSString *, RLMRealm *, RLMClassInfo&);
+template NSArray *RLMCollectionValueForKey(realm::Results&, NSString *, RLMClassInfo&);
+template NSArray *RLMCollectionValueForKey(realm::List&, NSString *, RLMClassInfo&);
 
 void RLMCollectionSetValueForKey(id<RLMFastEnumerable> collection, NSString *key, id value) {
     realm::TableView tv = [collection tableView];
@@ -234,9 +231,8 @@ void RLMCollectionSetValueForKey(id<RLMFastEnumerable> collection, NSString *key
         return;
     }
 
-    RLMRealm *realm = collection.realm;
     RLMClassInfo *info = collection.objectInfo;
-    RLMObject *accessor = RLMCreateManagedAccessor(info->rlmObjectSchema.accessorClass, realm, info);
+    RLMObject *accessor = RLMCreateManagedAccessor(info->rlmObjectSchema.accessorClass, info);
     for (size_t i = 0; i < tv.size(); i++) {
         accessor->_row = tv[i];
         RLMInitializeSwiftAccessorGenerics(accessor);
diff --git a/Pods/Realm/Realm/RLMJSONModels.m b/Pods/Realm/Realm/RLMJSONModels.m
index 3dc03ea..8934d38 100644
--- a/Pods/Realm/Realm/RLMJSONModels.m
+++ b/Pods/Realm/Realm/RLMJSONModels.m
@@ -46,7 +46,6 @@ @interface RLMTokenDataModel ()
 @property (nonatomic, readwrite) NSString *path;
 @property (nonatomic, readwrite) NSTimeInterval expires;
 @property (nonatomic, readwrite) BOOL isAdmin;
-//@property (nonatomic, readwrite) NSArray *access;
 
 @end
 
@@ -97,6 +96,7 @@ @interface RLMAuthResponseModel ()
 
 @property (nonatomic, readwrite) RLMTokenModel *accessToken;
 @property (nonatomic, readwrite) RLMTokenModel *refreshToken;
+@property (nonatomic, readwrite) NSString *urlPrefix;
 
 @end
 
@@ -118,6 +118,7 @@ - (instancetype)initWithDictionary:(NSDictionary *)jsonDictionary
         } else {
             RLM_SYNC_PARSE_OPTIONAL_MODEL(jsonDictionary, kRLMSyncRefreshTokenKey, RLMTokenModel, refreshToken);
         }
+        self.urlPrefix = jsonDictionary[@"sync_worker"][@"path"];
         return self;
     }
     return nil;
diff --git a/Pods/Realm/Realm/RLMListBase.mm b/Pods/Realm/Realm/RLMListBase.mm
index 6988acc..bcc8169 100644
--- a/Pods/Realm/Realm/RLMListBase.mm
+++ b/Pods/Realm/Realm/RLMListBase.mm
@@ -19,7 +19,11 @@
 #import "RLMListBase.h"
 
 #import "RLMArray_Private.hpp"
+#import "RLMObjectSchema_Private.h"
+#import "RLMObject_Private.hpp"
 #import "RLMObservation.hpp"
+#import "RLMProperty_Private.h"
+#import "RLMRealm_Private.hpp"
 
 @interface RLMArray (KVO)
 - (NSArray *)objectsAtIndexes:(__unused NSIndexSet *)indexes;
@@ -29,6 +33,14 @@ @implementation RLMListBase {
     std::unique_ptr<RLMObservationInfo> _observationInfo;
 }
 
++ (RLMArray *)_unmanagedArray {
+    return nil;
+}
+
+- (instancetype)init {
+    return self = [super init];
+}
+
 - (instancetype)initWithArray:(RLMArray *)array {
     self = [super init];
     if (self) {
@@ -37,28 +49,87 @@ - (instancetype)initWithArray:(RLMArray *)array {
     return self;
 }
 
+- (RLMArray *)_rlmArray {
+    if (!__rlmArray) {
+        __rlmArray = self.class._unmanagedArray;
+    }
+    return __rlmArray;
+}
+
 - (id)valueForKey:(NSString *)key {
-    return [__rlmArray valueForKey:key];
+    return [self._rlmArray valueForKey:key];
 }
 
 - (id)valueForKeyPath:(NSString *)keyPath {
-    return [__rlmArray valueForKeyPath:keyPath];
+    return [self._rlmArray valueForKeyPath:keyPath];
 }
 
-- (NSUInteger)countByEnumeratingWithState:(NSFastEnumerationState *)state objects:(id __unsafe_unretained [])buffer count:(NSUInteger)len {
-    return [__rlmArray countByEnumeratingWithState:state objects:buffer count:len];
+- (NSUInteger)countByEnumeratingWithState:(NSFastEnumerationState *)state
+                                  objects:(id __unsafe_unretained [])buffer
+                                    count:(NSUInteger)len {
+    return [self._rlmArray countByEnumeratingWithState:state objects:buffer count:len];
 }
 
 - (NSArray *)objectsAtIndexes:(NSIndexSet *)indexes {
-    return [__rlmArray objectsAtIndexes:indexes];
+    return [self._rlmArray objectsAtIndexes:indexes];
 }
 
 - (void)addObserver:(id)observer
          forKeyPath:(NSString *)keyPath
             options:(NSKeyValueObservingOptions)options
             context:(void *)context {
-    RLMEnsureArrayObservationInfo(_observationInfo, keyPath, __rlmArray, self);
+    RLMEnsureArrayObservationInfo(_observationInfo, keyPath, self._rlmArray, self);
     [super addObserver:observer forKeyPath:keyPath options:options context:context];
 }
 
 @end
+
+@implementation RLMLinkingObjectsHandle {
+    realm::Row _row;
+    RLMClassInfo *_info;
+    RLMRealm *_realm;
+    RLMProperty *_property;
+
+    RLMResults *_results;
+}
+
+- (instancetype)initWithObject:(RLMObjectBase *)object property:(RLMProperty *)prop {
+    if (!(self = [super init])) {
+        return nil;
+    }
+
+    _row = object->_row;
+    _info = object->_info;
+    _realm = object->_realm;
+    _property = prop;
+
+    return self;
+}
+
+- (RLMResults *)results {
+    if (_results) {
+        return _results;
+    }
+    if (!_row.is_attached()) {
+        @throw RLMException(@"Object has been deleted or invalidated.");
+    }
+    [_realm verifyThread];
+
+    auto& objectInfo = _realm->_info[_property.objectClassName];
+    auto& linkOrigin = _info->objectSchema->computed_properties[_property.index].link_origin_property_name;
+    auto linkingProperty = objectInfo.objectSchema->property_for_name(linkOrigin);
+    auto backlinkView = _row.get_table()->get_backlink_view(_row.get_index(),
+                                                            objectInfo.table(),
+                                                            linkingProperty->table_column);
+    realm::Results results(_realm->_realm, std::move(backlinkView));
+    _results = [RLMLinkingObjects resultsWithObjectInfo:objectInfo results:std::move(results)];
+    _realm = nil;
+    return _results;
+}
+
+- (RLMObjectBase *)parent {
+    RLMObjectBase *obj = RLMCreateManagedAccessor(_info->rlmObjectSchema.accessorClass, _info);
+    obj->_row = _row;
+    return obj;
+}
+@end
diff --git a/Pods/Realm/Realm/RLMManagedArray.mm b/Pods/Realm/Realm/RLMManagedArray.mm
index 2593618..0b9e393 100644
--- a/Pods/Realm/Realm/RLMManagedArray.mm
+++ b/Pods/Realm/Realm/RLMManagedArray.mm
@@ -61,7 +61,6 @@ @implementation RLMManagedArray {
 }
 
 - (RLMManagedArray *)initWithList:(realm::List)list
-                            realm:(__unsafe_unretained RLMRealm *const)realm
                        parentInfo:(RLMClassInfo *)parentInfo
                          property:(__unsafe_unretained RLMProperty *const)property {
     if (property.type == RLMPropertyTypeObject)
@@ -69,8 +68,8 @@ - (RLMManagedArray *)initWithList:(realm::List)list
     else
         self = [self initWithObjectType:property.type optional:property.optional];
     if (self) {
-        _realm = realm;
-        REALM_ASSERT(list.get_realm() == realm->_realm);
+        _realm = parentInfo->realm;
+        REALM_ASSERT(list.get_realm() == _realm->_realm);
         _backingList = std::move(list);
         _ownerInfo = parentInfo;
         if (property.type == RLMPropertyTypeObject)
@@ -88,7 +87,6 @@ - (RLMManagedArray *)initWithParent:(__unsafe_unretained RLMObjectBase *const)pa
     auto col = parentObject->_info->tableColumn(property);
     auto& row = parentObject->_row;
     return [self initWithList:realm::List(realm->_realm, *row.get_table(), col, row.get_index())
-                        realm:realm
                    parentInfo:parentObject->_info
                      property:property];
 }
@@ -252,7 +250,7 @@ - (NSUInteger)countByEnumeratingWithState:(NSFastEnumerationState *)state
 
 - (id)objectAtIndex:(NSUInteger)index {
     return translateErrors([&] {
-        RLMAccessorContext context(_realm, *_objectInfo);
+        RLMAccessorContext context(*_objectInfo);
         return _backingList.get(context, index);
     });
 }
@@ -264,7 +262,7 @@ static void RLMInsertObject(RLMManagedArray *ar, id object, NSUInteger index) {
     }
 
     changeArray(ar, NSKeyValueChangeInsertion, index, ^{
-        RLMAccessorContext context(ar->_realm, *ar->_objectInfo);
+        RLMAccessorContext context(*ar->_objectInfo);
         ar->_backingList.insert(context, index, object);
     });
 }
@@ -280,7 +278,7 @@ - (void)insertObject:(id)object atIndex:(NSUInteger)index {
 - (void)insertObjects:(id<NSFastEnumeration>)objects atIndexes:(NSIndexSet *)indexes {
     changeArray(self, NSKeyValueChangeInsertion, indexes, ^{
         NSUInteger index = [indexes firstIndex];
-        RLMAccessorContext context(_realm, *_objectInfo);
+        RLMAccessorContext context(*_objectInfo);
         for (id obj in objects) {
             RLMArrayValidateMatchingObjectType(self, obj);
             _backingList.insert(context, index, obj);
@@ -306,7 +304,7 @@ - (void)removeObjectsAtIndexes:(NSIndexSet *)indexes {
 
 - (void)addObjectsFromArray:(NSArray *)array {
     changeArray(self, NSKeyValueChangeInsertion, NSMakeRange(self.count, array.count), ^{
-        RLMAccessorContext context(_realm, *_objectInfo);
+        RLMAccessorContext context(*_objectInfo);
         for (id obj in array) {
             RLMArrayValidateMatchingObjectType(self, obj);
             _backingList.add(context, obj);
@@ -323,7 +321,7 @@ - (void)removeAllObjects {
 - (void)replaceObjectAtIndex:(NSUInteger)index withObject:(id)object {
     RLMArrayValidateMatchingObjectType(self, object);
     changeArray(self, NSKeyValueChangeReplacement, index, ^{
-        RLMAccessorContext context(_realm, *_objectInfo);
+        RLMAccessorContext context(*_objectInfo);
         _backingList.set(context, index, object);
     });
 }
@@ -349,7 +347,7 @@ - (void)exchangeObjectAtIndex:(NSUInteger)index1 withObjectAtIndex:(NSUInteger)i
 - (NSUInteger)indexOfObject:(id)object {
     RLMArrayValidateMatchingObjectType(self, object);
     return translateErrors([&] {
-        RLMAccessorContext context(_realm, *_objectInfo);
+        RLMAccessorContext context(*_objectInfo);
         return RLMConvertNotFound(_backingList.find(context, object));
     });
 }
@@ -378,14 +376,14 @@ - (id)valueForKey:(NSString *)key {
         }
 
         _backingList.verify_attached();
-        return RLMCollectionValueForKey(_backingList, key, _realm, *_objectInfo);
+        return RLMCollectionValueForKey(_backingList, key, *_objectInfo);
     });
 }
 
 - (void)setValue:(id)value forKey:(NSString *)key {
     if ([key isEqualToString:@"self"]) {
         RLMArrayValidateMatchingObjectType(self, value);
-        RLMAccessorContext context(_realm, *_objectInfo);
+        RLMAccessorContext context(*_objectInfo);
         translateErrors([&] {
             for (size_t i = 0, count = _backingList.size(); i < count; ++i) {
                 _backingList.set(context, i, value);
@@ -495,7 +493,7 @@ - (void)addObserver:(id)observer
 - (RLMFastEnumerator *)fastEnumerator {
     return translateErrors([&] {
         return [[RLMFastEnumerator alloc] initWithList:_backingList collection:self
-                                                 realm:_realm classInfo:*_objectInfo];
+                                             classInfo:*_objectInfo];
     });
 }
 
@@ -537,7 +535,6 @@ + (instancetype)objectWithThreadSafeReference:(std::unique_ptr<realm::ThreadSafe
     }
     RLMClassInfo *parentInfo = &realm->_info[metadata.parentClassName];
     return [[RLMManagedArray alloc] initWithList:std::move(list)
-                                            realm:realm
                                        parentInfo:parentInfo
                                          property:parentInfo->rlmObjectSchema[metadata.key]];
 }
diff --git a/Pods/Realm/Realm/RLMNetworkClient.mm b/Pods/Realm/Realm/RLMNetworkClient.mm
index db1f67a..009795e 100644
--- a/Pods/Realm/Realm/RLMNetworkClient.mm
+++ b/Pods/Realm/Realm/RLMNetworkClient.mm
@@ -21,6 +21,7 @@
 #import "RLMRealmConfiguration.h"
 #import "RLMJSONModels.h"
 #import "RLMSyncUtil_Private.hpp"
+#import "RLMSyncManager_Private.h"
 #import "RLMUtil.hpp"
 
 #import <realm/util/scope_exit.hpp>
@@ -41,22 +42,25 @@ static NSRange rangeForErrorType(RLMServerHTTPErrorCodeType type) {
     return NSMakeRange(type*100, kHTTPCodeRange);
 }
 
-static std::atomic<NSTimeInterval> g_defaultTimeout{60.0};
+#pragma mark Network client
 
-@interface RLMSyncServerEndpoint ()
-- (instancetype)initPrivate NS_DESIGNATED_INITIALIZER;
+@interface RLMSessionDelegate <NSURLSessionDelegate> : NSObject
++ (instancetype)delegateWithCertificatePaths:(NSDictionary *)paths
+                                  completion:(void (^)(NSError *, NSDictionary *))completion;
+@end
 
+@interface RLMSyncServerEndpoint ()
 /// The HTTP method the endpoint expects. Defaults to POST.
-- (NSString *)httpMethod;
++ (NSString *)httpMethod;
 
 /// The URL to which the request should be made. Must be implemented.
-- (NSURL *)urlForAuthServer:(NSURL *)authServerURL payload:(NSDictionary *)json;
++ (NSURL *)urlForAuthServer:(NSURL *)authServerURL payload:(NSDictionary *)json;
 
 /// The body for the request, if any.
-- (NSData *)httpBodyForPayload:(NSDictionary *)json error:(NSError **)error;
++ (NSData *)httpBodyForPayload:(NSDictionary *)json error:(NSError **)error;
 
 /// The HTTP headers to be added to the request, if any.
-- (NSDictionary<NSString *, NSString *> *)httpHeadersForPayload:(NSDictionary *)json
++ (NSDictionary<NSString *, NSString *> *)httpHeadersForPayload:(NSDictionary *)json
                                                         options:(nullable RLMNetworkRequestOptions *)options;
 @end
 
@@ -64,36 +68,63 @@ @implementation RLMSyncServerEndpoint
 
 + (void)sendRequestToServer:(NSURL *)serverURL
                        JSON:(NSDictionary *)jsonDictionary
-                    options:(nullable RLMNetworkRequestOptions *)options
                  completion:(void (^)(NSError *))completionBlock {
-    [RLMNetworkClient sendRequestToEndpoint:[self endpoint]
-                                     server:serverURL
-                                       JSON:jsonDictionary
-                                    timeout:g_defaultTimeout.load()
-                                    options:options
-                                 completion:^(NSError *error, NSDictionary *) {
-                                     completionBlock(error);
-                                 }];
+    [self sendRequestToServer:serverURL JSON:jsonDictionary timeout:0
+                   completion:^(NSError *error, NSDictionary *) {
+        completionBlock(error);
+    }];
 }
++ (void)sendRequestToServer:(NSURL *)serverURL
+                       JSON:(NSDictionary *)jsonDictionary
+                    timeout:(NSTimeInterval)timeout
+                 completion:(void (^)(NSError *, NSDictionary *))completionBlock {
+    // If the timeout isn't set then use the timeout set on the sync manager,
+    // or 60 seconds if it isn't set there either.
+    RLMSyncManager *syncManager = RLMSyncManager.sharedManager;
+    if (timeout < 1)
+        timeout = syncManager.timeoutOptions.connectTimeout / 1000.0;
+    if (timeout < 1)
+        timeout = 60.0;
 
-+ (instancetype)endpoint {
-    return [[self alloc] initPrivate];
-}
+    // Create the request
+    NSError *localError = nil;
+    NSURL *requestURL = [self urlForAuthServer:serverURL payload:jsonDictionary];
+    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:requestURL];
+    request.HTTPMethod = [self httpMethod];
+    if (![request.HTTPMethod isEqualToString:@"GET"]) {
+        request.HTTPBody = [self httpBodyForPayload:jsonDictionary error:&localError];
+        if (localError) {
+            completionBlock(localError, nil);
+            return;
+        }
+    }
+    request.timeoutInterval = timeout;
+    RLMNetworkRequestOptions *options = syncManager.networkRequestOptions;
+    NSDictionary<NSString *, NSString *> *headers = [self httpHeadersForPayload:jsonDictionary options:options];
+    for (NSString *key in headers) {
+        [request addValue:headers[key] forHTTPHeaderField:key];
+    }
+    id delegate = [RLMSessionDelegate delegateWithCertificatePaths:options.pinnedCertificatePaths
+                                                        completion:completionBlock];
+    auto session = [NSURLSession sessionWithConfiguration:NSURLSessionConfiguration.defaultSessionConfiguration
+                                                 delegate:delegate delegateQueue:nil];
 
-- (instancetype)initPrivate {
-    return (self = [super init]);
+    // Add the request to a task and start it
+    [[session dataTaskWithRequest:request] resume];
+    // Tell the session to destroy itself once it's done with the request
+    [session finishTasksAndInvalidate];
 }
 
-- (NSString *)httpMethod {
++ (NSString *)httpMethod {
     return @"POST";
 }
 
-- (NSURL *)urlForAuthServer:(__unused NSURL *)authServerURL payload:(__unused NSDictionary *)json {
++ (NSURL *)urlForAuthServer:(__unused NSURL *)authServerURL payload:(__unused NSDictionary *)json {
     NSAssert(NO, @"This method must be overriden by concrete subclasses.");
     return nil;
 }
 
-- (NSData *)httpBodyForPayload:(NSDictionary *)json error:(NSError **)error {
++ (NSData *)httpBodyForPayload:(NSDictionary *)json error:(NSError **)error {
     NSError *localError = nil;
     NSData *jsonData = [NSJSONSerialization dataWithJSONObject:json
                                                        options:(NSJSONWritingOptions)0
@@ -108,7 +139,8 @@ - (NSData *)httpBodyForPayload:(NSDictionary *)json error:(NSError **)error {
     return nil;
 }
 
-- (NSDictionary<NSString *, NSString *> *)httpHeadersForPayload:(__unused NSDictionary *)json options:(nullable RLMNetworkRequestOptions *)options {
++ (NSDictionary<NSString *, NSString *> *)httpHeadersForPayload:(NSDictionary *)json
+                                                        options:(nullable RLMNetworkRequestOptions *)options {
     NSMutableDictionary<NSString *, NSString *> *headers = [[NSMutableDictionary alloc] init];
     headers[@"Content-Type"] = @"application/json;charset=utf-8";
     headers[@"Accept"] = @"application/json";
@@ -116,85 +148,22 @@ - (NSData *)httpBodyForPayload:(NSDictionary *)json error:(NSError **)error {
     if (NSDictionary<NSString *, NSString *> *customHeaders = options.customHeaders) {
         [headers addEntriesFromDictionary:customHeaders];
     }
-
-    return headers;
-}
-@end
-
-@implementation RLMSyncAuthEndpoint
-- (NSURL *)urlForAuthServer:(NSURL *)authServerURL payload:(__unused NSDictionary *)json {
-    return [authServerURL URLByAppendingPathComponent:@"auth"];
-}
-@end
-
-@implementation RLMSyncChangePasswordEndpoint
-- (NSString *)httpMethod {
-    return @"PUT";
-}
-
-- (NSURL *)urlForAuthServer:(NSURL *)authServerURL payload:(__unused NSDictionary *)json {
-    return [authServerURL URLByAppendingPathComponent:@"auth/password"];
-}
-
-- (NSDictionary *)httpHeadersForPayload:(NSDictionary *)json options:(nullable RLMNetworkRequestOptions *)options {
-    NSString *authToken = [json objectForKey:kRLMSyncTokenKey];
-    if (!authToken) {
-        @throw RLMException(@"Malformed request; this indicates an internal error.");
+    if (NSString *authToken = [json objectForKey:kRLMSyncTokenKey]) {
+        headers[options.authorizationHeaderName ?: @"Authorization"] = authToken;
     }
-    NSMutableDictionary *headers = [[super httpHeadersForPayload:json options:options] mutableCopy];
-    headers[options.authorizationHeaderName ?: @"Authorization"] = authToken;
-    return headers;
-}
-@end
-
-@implementation RLMSyncUpdateAccountEndpoint
-- (NSURL *)urlForAuthServer:(NSURL *)authServerURL payload:(__unused NSDictionary *)json {
-    return [authServerURL URLByAppendingPathComponent:@"auth/password/updateAccount"];
-}
-@end
 
-@implementation RLMSyncGetUserInfoEndpoint
-- (NSString *)httpMethod {
-    return @"GET";
-}
-
-- (NSURL *)urlForAuthServer:(NSURL *)authServerURL payload:(NSDictionary *)json {
-    NSString *provider = json[kRLMSyncProviderKey];
-    NSString *providerID = json[kRLMSyncProviderIDKey];
-    NSAssert([provider isKindOfClass:[NSString class]] && [providerID isKindOfClass:[NSString class]],
-             @"malformed request; this indicates a logic error in the binding.");
-    NSCharacterSet *allowed = [NSCharacterSet URLQueryAllowedCharacterSet];
-    NSString *pathComponent = [NSString stringWithFormat:@"auth/users/%@/%@",
-                               [provider stringByAddingPercentEncodingWithAllowedCharacters:allowed],
-                               [providerID stringByAddingPercentEncodingWithAllowedCharacters:allowed]];
-    return [authServerURL URLByAppendingPathComponent:pathComponent];
-}
-
-- (NSData *)httpBodyForPayload:(__unused NSDictionary *)json error:(__unused NSError **)error {
-    return nil;
-}
-
-- (NSDictionary<NSString *, NSString *> *)httpHeadersForPayload:(NSDictionary *)json options:(nullable RLMNetworkRequestOptions *)options {
-    NSString *authToken = [json objectForKey:kRLMSyncTokenKey];
-    if (!authToken) {
-        @throw RLMException(@"Malformed request; this indicates an internal error.");
-    }
-    NSMutableDictionary *headers = [[super httpHeadersForPayload:json options:options] mutableCopy];
-    headers[options.authorizationHeaderName ?: @"Authorization"] = authToken;
     return headers;
 }
 @end
 
-@interface RLMSessionDelegate <NSURLSessionDelegate> : NSObject
-@end
-
 @implementation RLMSessionDelegate {
     NSDictionary<NSString *, NSURL *> *_certificatePaths;
     NSData *_data;
     void (^_completionBlock)(NSError *, NSDictionary *);
 }
 
-+ (instancetype)delegateWithCertificatePaths:(NSDictionary *)paths completion:(void (^)(NSError *, NSDictionary *))completion {
++ (instancetype)delegateWithCertificatePaths:(NSDictionary *)paths
+                                  completion:(void (^)(NSError *, NSDictionary *))completion {
     RLMSessionDelegate *delegate = [RLMSessionDelegate new];
     delegate->_certificatePaths = paths;
     delegate->_completionBlock = completion;
@@ -310,7 +279,7 @@ - (void)URLSession:(__unused NSURLSession *)session
         return;
     }
 
-    if (![self validateResponse:task.response data:_data error:&error]) {
+    if (NSError *error = [self validateResponse:task.response data:_data]) {
         _completionBlock(error, nil);
         return;
     }
@@ -330,11 +299,10 @@ - (void)URLSession:(__unused NSURLSession *)session
     _completionBlock(nil, (NSDictionary *)json);
 }
 
-- (BOOL)validateResponse:(NSURLResponse *)response data:(NSData *)data error:(NSError * __autoreleasing *)error {
+- (NSError *)validateResponse:(NSURLResponse *)response data:(NSData *)data {
     if (![response isKindOfClass:[NSHTTPURLResponse class]]) {
         // FIXME: Provide error message
-        *error = make_auth_error_bad_response();
-        return NO;
+        return make_auth_error_bad_response();
     }
 
     NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse *)response;
@@ -353,28 +321,22 @@ - (BOOL)validateResponse:(NSURLResponse *)response data:(NSData *)data error:(NS
                 case RLMSyncAuthErrorExpiredPermissionOffer:
                 case RLMSyncAuthErrorAmbiguousPermissionOffer:
                 case RLMSyncAuthErrorFileCannotBeShared:
-                    *error = make_auth_error(responseModel);
-                    break;
+                    return make_auth_error(responseModel);
                 default:
                     // Right now we assume that any codes not described
                     // above are generic HTTP error codes.
-                    *error = make_auth_error_http_status(responseModel.status);
-                    break;
+                    return make_auth_error_http_status(responseModel.status);
             }
-        } else {
-            *error = make_auth_error_http_status(httpResponse.statusCode);
         }
-
-        return NO;
+        return make_auth_error_http_status(httpResponse.statusCode);
     }
 
     if (!data) {
         // FIXME: provide error message
-        *error = make_auth_error_bad_response();
-        return NO;
+        return make_auth_error_bad_response();
     }
 
-    return YES;
+    return nil;
 }
 
 - (RLMSyncErrorResponseModel *)responseModelFromData:(NSData *)data {
@@ -392,42 +354,96 @@ - (RLMSyncErrorResponseModel *)responseModelFromData:(NSData *)data {
 
 @end
 
-@implementation RLMNetworkClient
-+ (void)setDefaultTimeout:(NSTimeInterval)timeOut {
-    g_defaultTimeout = timeOut;
+@implementation RLMNetworkRequestOptions
+@end
+
+#pragma mark - Endpoint Implementations
+
+@implementation RLMSyncAuthEndpoint
++ (NSURL *)urlForAuthServer:(NSURL *)authServerURL payload:(__unused NSDictionary *)json {
+    return [authServerURL URLByAppendingPathComponent:@"auth"];
 }
+@end
 
-+ (void)sendRequestToEndpoint:(RLMSyncServerEndpoint *)endpoint
-                       server:(NSURL *)serverURL
-                         JSON:(NSDictionary *)jsonDictionary
-                      timeout:(NSTimeInterval)timeout
-                      options:(nullable RLMNetworkRequestOptions *)options
-                   completion:(RLMSyncCompletionBlock)completionBlock {
-    // Create the request
-    NSError *localError = nil;
-    NSURL *requestURL = [endpoint urlForAuthServer:serverURL payload:jsonDictionary];
-    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:requestURL];
-    request.HTTPBody = [endpoint httpBodyForPayload:jsonDictionary error:&localError];
-    if (localError) {
-        completionBlock(localError, nil);
-        return;
-    }
-    request.HTTPMethod = [endpoint httpMethod];
-    request.timeoutInterval = MAX(timeout, 10);
-    NSDictionary<NSString *, NSString *> *headers = [endpoint httpHeadersForPayload:jsonDictionary options:options];
-    for (NSString *key in headers) {
-        [request addValue:headers[key] forHTTPHeaderField:key];
-    }
-    id delegate = [RLMSessionDelegate delegateWithCertificatePaths:options.pinnedCertificatePaths
-                                                        completion:completionBlock];
-    auto session = [NSURLSession sessionWithConfiguration:NSURLSessionConfiguration.defaultSessionConfiguration
-                                                 delegate:delegate delegateQueue:nil];
+@implementation RLMSyncChangePasswordEndpoint
++ (NSString *)httpMethod {
+    return @"PUT";
+}
 
-    // Add the request to a task and start it
-    [[session dataTaskWithRequest:request] resume];
++ (NSURL *)urlForAuthServer:(NSURL *)authServerURL payload:(__unused NSDictionary *)json {
+    return [authServerURL URLByAppendingPathComponent:@"auth/password"];
 }
 @end
 
-@implementation RLMNetworkRequestOptions
+@implementation RLMSyncUpdateAccountEndpoint
++ (NSURL *)urlForAuthServer:(NSURL *)authServerURL payload:(__unused NSDictionary *)json {
+    return [authServerURL URLByAppendingPathComponent:@"auth/password/updateAccount"];
+}
+@end
+
+@implementation RLMSyncGetUserInfoEndpoint
++ (NSString *)httpMethod {
+    return @"GET";
+}
+
++ (NSURL *)urlForAuthServer:(NSURL *)authServerURL payload:(NSDictionary *)json {
+    NSString *provider = json[kRLMSyncProviderKey];
+    NSString *providerID = json[kRLMSyncProviderIDKey];
+    NSAssert([provider isKindOfClass:[NSString class]] && [providerID isKindOfClass:[NSString class]],
+             @"malformed request; this indicates a logic error in the binding.");
+    NSCharacterSet *allowed = [NSCharacterSet URLQueryAllowedCharacterSet];
+    NSString *pathComponent = [NSString stringWithFormat:@"auth/users/%@/%@",
+                               [provider stringByAddingPercentEncodingWithAllowedCharacters:allowed],
+                               [providerID stringByAddingPercentEncodingWithAllowedCharacters:allowed]];
+    return [authServerURL URLByAppendingPathComponent:pathComponent];
+}
+
++ (NSData *)httpBodyForPayload:(__unused NSDictionary *)json error:(__unused NSError **)error {
+    return nil;
+}
+@end
 
+@implementation RLMSyncGetPermissionsEndpoint
++ (NSString *)httpMethod {
+    return @"GET";
+}
++ (NSURL *)urlForAuthServer:(NSURL *)authServerURL payload:(__unused NSDictionary *)json {
+    return [authServerURL URLByAppendingPathComponent:@"permissions"];
+}
+@end
+
+@implementation RLMSyncGetPermissionOffersEndpoint
++ (NSString *)httpMethod {
+    return @"GET";
+}
++ (NSURL *)urlForAuthServer:(NSURL *)authServerURL payload:(__unused NSDictionary *)json {
+    return [authServerURL URLByAppendingPathComponent:@"permissions/offers"];
+}
+@end
+
+@implementation RLMSyncApplyPermissionsEndpoint
++ (NSURL *)urlForAuthServer:(NSURL *)authServerURL payload:(__unused NSDictionary *)json {
+    return [authServerURL URLByAppendingPathComponent:@"permissions/apply"];
+}
+@end
+
+@implementation RLMSyncOfferPermissionsEndpoint
++ (NSURL *)urlForAuthServer:(NSURL *)authServerURL payload:(__unused NSDictionary *)json {
+    return [authServerURL URLByAppendingPathComponent:@"permissions/offers"];
+}
+@end
+
+@implementation RLMSyncAcceptPermissionOfferEndpoint
++ (NSURL *)urlForAuthServer:(NSURL *)authServerURL payload:(NSDictionary *)json {
+    return [authServerURL URLByAppendingPathComponent:[NSString stringWithFormat:@"permissions/offers/%@/accept", json[@"offerToken"]]];
+}
+@end
+
+@implementation RLMSyncInvalidatePermissionOfferEndpoint
++ (NSString *)httpMethod {
+    return @"DELETE";
+}
++ (NSURL *)urlForAuthServer:(NSURL *)authServerURL payload:(NSDictionary *)json {
+    return [authServerURL URLByAppendingPathComponent:[NSString stringWithFormat:@"permissions/offers/%@", json[@"offerToken"]]];
+}
 @end
diff --git a/Pods/Realm/Realm/RLMObject.mm b/Pods/Realm/Realm/RLMObject.mm
index 1ace411..663ec64 100644
--- a/Pods/Realm/Realm/RLMObject.mm
+++ b/Pods/Realm/Realm/RLMObject.mm
@@ -24,7 +24,7 @@
 #import "RLMObjectBase_Private.h"
 #import "RLMObjectSchema_Private.hpp"
 #import "RLMObjectStore.h"
-#import "RLMProperty.h"
+#import "RLMProperty_Private.h"
 #import "RLMQueryUtil.hpp"
 #import "RLMRealm_Private.hpp"
 #import "RLMSchema_Private.h"
@@ -55,42 +55,42 @@ - (instancetype)init {
     return [super init];
 }
 
-- (instancetype)initWithValue:(id)value schema:(RLMSchema *)schema {
-    return [super initWithValue:value schema:schema];
-}
-
-- (instancetype)initWithRealm:(__unsafe_unretained RLMRealm *const)realm schema:(RLMObjectSchema *)schema {
-    return [super initWithRealm:realm schema:schema];
-}
-
 #pragma mark - Convenience Initializers
 
 - (instancetype)initWithValue:(id)value {
-    return [super initWithValue:value schema:RLMSchema.partialPrivateSharedSchema];
+    if (!(self = [self init])) {
+        return nil;
+    }
+    RLMInitializeWithValue(self, value, RLMSchema.partialPrivateSharedSchema);
+    return self;
 }
 
 #pragma mark - Class-based Object Creation
 
 + (instancetype)createInDefaultRealmWithValue:(id)value {
-    return (RLMObject *)RLMCreateObjectInRealmWithValue([RLMRealm defaultRealm], [self className], value, false);
+    return (RLMObject *)RLMCreateObjectInRealmWithValue([RLMRealm defaultRealm], [self className], value, RLMUpdatePolicyError);
 }
 
 + (instancetype)createInRealm:(RLMRealm *)realm withValue:(id)value {
-    return (RLMObject *)RLMCreateObjectInRealmWithValue(realm, [self className], value, false);
+    return (RLMObject *)RLMCreateObjectInRealmWithValue(realm, [self className], value, RLMUpdatePolicyError);
 }
 
 + (instancetype)createOrUpdateInDefaultRealmWithValue:(id)value {
     return [self createOrUpdateInRealm:[RLMRealm defaultRealm] withValue:value];
 }
 
++ (instancetype)createOrUpdateModifiedInDefaultRealmWithValue:(id)value {
+    return [self createOrUpdateModifiedInRealm:[RLMRealm defaultRealm] withValue:value];
+}
+
 + (instancetype)createOrUpdateInRealm:(RLMRealm *)realm withValue:(id)value {
-    // verify primary key
-    RLMObjectSchema *schema = [self sharedSchema];
-    if (!schema.primaryKeyProperty) {
-        NSString *reason = [NSString stringWithFormat:@"'%@' does not have a primary key and can not be updated", schema.className];
-        @throw [NSException exceptionWithName:@"RLMExecption" reason:reason userInfo:nil];
-    }
-    return (RLMObject *)RLMCreateObjectInRealmWithValue(realm, [self className], value, true);
+    RLMVerifyHasPrimaryKey(self);
+    return (RLMObject *)RLMCreateObjectInRealmWithValue(realm, [self className], value, RLMUpdatePolicyUpdateAll);
+}
+
++ (instancetype)createOrUpdateModifiedInRealm:(RLMRealm *)realm withValue:(id)value {
+    RLMVerifyHasPrimaryKey(self);
+    return (RLMObject *)RLMCreateObjectInRealmWithValue(realm, [self className], value, RLMUpdatePolicyUpdateChanged);
 }
 
 #pragma mark - Subscripting
@@ -212,89 +212,42 @@ + (NSArray *)requiredProperties {
     return @[];
 }
 
++ (bool)_realmIgnoreClass {
+    return false;
+}
+
 @end
 
 @implementation RLMDynamicObject
 
++ (bool)_realmIgnoreClass {
+    return true;
+}
+
 + (BOOL)shouldIncludeInDefaultSchema {
     return NO;
 }
 
 - (id)valueForUndefinedKey:(NSString *)key {
-    return RLMDynamicGetByName(self, key, false);
+    return RLMDynamicGetByName(self, key);
 }
 
 - (void)setValue:(id)value forUndefinedKey:(NSString *)key {
     RLMDynamicValidatedSet(self, key, value);
 }
 
-@end
-
-@implementation RLMWeakObjectHandle {
-    realm::Row _row;
-    RLMClassInfo *_info;
-    Class _objectClass;
-}
-
-- (instancetype)initWithObject:(RLMObjectBase *)object {
-    if (!(self = [super init])) {
-        return nil;
-    }
-
-    _row = object->_row;
-    _info = object->_info;
-    _objectClass = object.class;
-
-    return self;
-}
-
-- (RLMObjectBase *)object {
-    RLMObjectBase *object = RLMCreateManagedAccessor(_objectClass, _info->realm, _info);
-    object->_row = std::move(_row);
-    return object;
-}
-
-- (id)copyWithZone:(__unused NSZone *)zone {
-    RLMWeakObjectHandle *copy = [[RLMWeakObjectHandle alloc] init];
-    copy->_row = _row;
-    copy->_info = _info;
-    copy->_objectClass = _objectClass;
-    return copy;
++ (RLMObjectSchema *)sharedSchema {
+    return nil;
 }
 
 @end
 
-static bool treatFakeObjectAsRLMObject = false;
-void RLMSetTreatFakeObjectAsRLMObject(BOOL flag) {
-    treatFakeObjectAsRLMObject = flag;
-}
-
 BOOL RLMIsObjectOrSubclass(Class klass) {
-    if (RLMIsKindOfClass(klass, RLMObjectBase.class)) {
-        return YES;
-    }
-
-    if (treatFakeObjectAsRLMObject) {
-        static Class FakeObjectClass = NSClassFromString(@"FakeObject");
-        return RLMIsKindOfClass(klass, FakeObjectClass);
-    }
-    return NO;
+    return RLMIsKindOfClass(klass, RLMObjectBase.class);
 }
 
 BOOL RLMIsObjectSubclass(Class klass) {
-    auto isSubclass = [](Class class1, Class class2) {
-        class1 = class_getSuperclass(class1);
-        return RLMIsKindOfClass(class1, class2);
-    };
-    if (isSubclass(class_getSuperclass(klass), RLMObjectBase.class)) {
-        return YES;
-    }
-
-    if (treatFakeObjectAsRLMObject) {
-        static Class FakeObjectClass = NSClassFromString(@"FakeObject");
-        return isSubclass(klass, FakeObjectClass);
-    }
-    return NO;
+    return RLMIsKindOfClass(class_getSuperclass(class_getSuperclass(klass)), RLMObjectBase.class);
 }
 
 @interface RLMObjectNotificationToken : RLMCancellationToken
diff --git a/Pods/Realm/Realm/RLMObjectBase.mm b/Pods/Realm/Realm/RLMObjectBase.mm
index 2e33a85..3b264c8 100644
--- a/Pods/Realm/Realm/RLMObjectBase.mm
+++ b/Pods/Realm/Realm/RLMObjectBase.mm
@@ -40,8 +40,20 @@
 
 const NSUInteger RLMDescriptionMaxDepth = 5;
 
+
+static bool isManagedAccessorClass(Class cls) {
+    const char *className = class_getName(cls);
+    const char accessorClassPrefix[] = "RLM:Managed";
+    return strncmp(className, accessorClassPrefix, sizeof(accessorClassPrefix) - 1) == 0;
+}
+
 static bool maybeInitObjectSchemaForUnmanaged(RLMObjectBase *obj) {
-    obj->_objectSchema = [obj.class sharedSchema];
+    Class cls = obj.class;
+    if (isManagedAccessorClass(cls)) {
+        return false;
+    }
+
+    obj->_objectSchema = [cls sharedSchema];
     if (!obj->_objectSchema) {
         return false;
     }
@@ -80,7 +92,12 @@ - (void)dealloc {
 }
 
 static id coerceToObjectType(id obj, Class cls, RLMSchema *schema) {
-    return [obj isKindOfClass:cls] ? obj : [[cls alloc] initWithValue:obj schema:schema];
+    if ([obj isKindOfClass:cls]) {
+        return obj;
+    }
+    id value = [[cls alloc] init];
+    RLMInitializeWithValue(value, obj, schema);
+    return value;
 }
 
 static id validatedObjectForProperty(__unsafe_unretained id const obj,
@@ -105,22 +122,19 @@ static id validatedObjectForProperty(__unsafe_unretained id const obj,
     return obj;
 }
 
-- (instancetype)initWithValue:(id)value schema:(RLMSchema *)schema {
-    if (!(self = [super init])) {
-        return self;
-    }
-
+void RLMInitializeWithValue(RLMObjectBase *self, id value, RLMSchema *schema) {
     if (!value || value == NSNull.null) {
         @throw RLMException(@"Must provide a non-nil value.");
     }
 
-    if (!maybeInitObjectSchemaForUnmanaged(self)) {
-        // Don't populate fields from the passed-in object if we're called
-        // during schema init
-        return self;
+    RLMObjectSchema *objectSchema = self->_objectSchema;
+    if (!objectSchema) {
+        // Will be nil if we're called during schema init, when we don't want
+        // to actually populate the object anyway
+        return;
     }
 
-    NSArray *properties = _objectSchema.properties;
+    NSArray *properties = objectSchema.properties;
     if (NSArray *array = RLMDynamicCast<NSArray>(value)) {
         if (array.count > properties.count) {
             @throw RLMException(@"Invalid array input: more values (%llu) than properties (%llu).",
@@ -129,44 +143,34 @@ - (instancetype)initWithValue:(id)value schema:(RLMSchema *)schema {
         NSUInteger i = 0;
         for (id val in array) {
             RLMProperty *prop = properties[i++];
-            [self setValue:validatedObjectForProperty(RLMCoerceToNil(val), _objectSchema, prop, schema)
+            [self setValue:validatedObjectForProperty(RLMCoerceToNil(val), objectSchema, prop, schema)
                     forKey:prop.name];
         }
     }
     else {
         // assume our object is an NSDictionary or an object with kvc properties
         for (RLMProperty *prop in properties) {
-            id obj = RLMValidatedValueForProperty(value, prop.name, _objectSchema.className);
+            id obj = RLMValidatedValueForProperty(value, prop.name, objectSchema.className);
 
             // don't set unspecified properties
             if (!obj) {
                 continue;
             }
 
-            [self setValue:validatedObjectForProperty(RLMCoerceToNil(obj), _objectSchema, prop, schema)
+            [self setValue:validatedObjectForProperty(RLMCoerceToNil(obj), objectSchema, prop, schema)
                     forKey:prop.name];
         }
     }
-
-    return self;
 }
 
-id RLMCreateManagedAccessor(Class cls, __unsafe_unretained RLMRealm *realm, RLMClassInfo *info) {
-    RLMObjectBase *obj = [[cls alloc] initWithRealm:realm schema:info->rlmObjectSchema];
+id RLMCreateManagedAccessor(Class cls, RLMClassInfo *info) {
+    RLMObjectBase *obj = [[cls alloc] init];
     obj->_info = info;
+    obj->_realm = info->realm;
+    obj->_objectSchema = info->rlmObjectSchema;
     return obj;
 }
 
-- (instancetype)initWithRealm:(__unsafe_unretained RLMRealm *const)realm
-                       schema:(RLMObjectSchema *)schema {
-    self = [super init];
-    if (self) {
-        _realm = realm;
-        _objectSchema = schema;
-    }
-    return self;
-}
-
 - (id)valueForKey:(NSString *)key {
     if (_observationInfo) {
         return _observationInfo->valueForKey(key);
@@ -176,7 +180,11 @@ - (id)valueForKey:(NSString *)key {
 
 // Generic Swift properties can't be dynamic, so KVO doesn't work for them by default
 - (id)valueForUndefinedKey:(NSString *)key {
-    if (Ivar ivar = _objectSchema[key].swiftIvar) {
+    RLMProperty *prop = _objectSchema[key];
+    if (Class accessor = prop.swiftAccessor) {
+        return [accessor get:(char *)(__bridge void *)self + ivar_getOffset(prop.swiftIvar)];
+    }
+    if (Ivar ivar = prop.swiftIvar) {
         return RLMCoerceToNil(object_getIvar(self, ivar));
     }
     return [super valueForUndefinedKey:key];
@@ -186,7 +194,8 @@ - (void)setValue:(id)value forUndefinedKey:(NSString *)key {
     value = RLMCoerceToNil(value);
     RLMProperty *property = _objectSchema[key];
     if (Ivar ivar = property.swiftIvar) {
-        if (property.array && (!value || [value conformsToProtocol:@protocol(NSFastEnumeration)])) {
+        if (property.array) {
+            value = RLMAsFastEnumeration(value);
             RLMArray *array = [object_getIvar(self, ivar) _rlmArray];
             [array removeAllObjects];
 
@@ -225,12 +234,11 @@ + (void)initializeLinkedObjectSchemas {
     }
 }
 
-+ (Class)objectUtilClass:(BOOL)isSwift {
-    return RLMObjectUtilClass(isSwift);
++ (nullable NSArray<RLMProperty *> *)_getPropertiesWithInstance:(__unused id)obj {
+    return nil;
 }
 
-- (NSString *)description
-{
+- (NSString *)description {
     if (self.isInvalidated) {
         return @"[invalid object]";
     }
@@ -318,6 +326,10 @@ + (NSDictionary *)_realmColumnNames {
     return nil;
 }
 
++ (bool)_realmIgnoreClass {
+    return false;
+}
+
 - (id)mutableArrayValueForKey:(NSString *)key {
     id obj = [self valueForKey:key];
     if ([obj isKindOfClass:[RLMArray class]]) {
@@ -345,12 +357,8 @@ - (void)removeObserver:(NSObject *)observer forKeyPath:(NSString *)keyPath {
 }
 
 + (BOOL)automaticallyNotifiesObserversForKey:(NSString *)key {
-    const char *className = class_getName(self);
-    const char accessorClassPrefix[] = "RLM:Managed";
-    if (!strncmp(className, accessorClassPrefix, sizeof(accessorClassPrefix) - 1)) {
-        if ([class_getSuperclass(self.class) sharedSchema][key]) {
-            return NO;
-        }
+    if (isManagedAccessorClass(self) && [class_getSuperclass(self.class) sharedSchema][key]) {
+        return NO;
     }
 
     return [super automaticallyNotifiesObserversForKey:key];
@@ -380,7 +388,7 @@ + (instancetype)objectWithThreadSafeReference:(std::unique_ptr<realm::ThreadSafe
     }
     NSString *objectClassName = @(object.get_object_schema().name.c_str());
 
-    return RLMCreateObjectAccessor(realm, realm->_info[objectClassName], object.row().get_index());
+    return RLMCreateObjectAccessor(realm->_info[objectClassName], object.row().get_index());
 }
 
 @end
@@ -399,7 +407,7 @@ id RLMObjectBaseObjectForKeyedSubscript(RLMObjectBase *object, NSString *key) {
     }
 
     if (object->_realm) {
-        return RLMDynamicGetByName(object, key, false);
+        return RLMDynamicGetByName(object, key);
     }
     else {
         return [object valueForKey:key];
@@ -458,85 +466,3 @@ id RLMValidatedValueForProperty(id object, NSString *key, NSString *className) {
         @throw;
     }
 }
-
-Class RLMObjectUtilClass(BOOL isSwift) {
-    static Class objectUtilObjc = [RLMObjectUtil class];
-    static Class objectUtilSwift = NSClassFromString(@"RealmSwiftObjectUtil");
-    return isSwift && objectUtilSwift ? objectUtilSwift : objectUtilObjc;
-}
-
-@implementation RLMObjectUtil
-
-+ (NSArray *)ignoredPropertiesForClass:(Class)cls {
-    return [cls ignoredProperties];
-}
-
-+ (NSArray *)indexedPropertiesForClass:(Class)cls {
-    return [cls indexedProperties];
-}
-
-+ (NSDictionary *)linkingObjectsPropertiesForClass:(Class)cls {
-    return [cls linkingObjectsProperties];
-}
-
-+ (NSDictionary *)linkingObjectProperties:(__unused id)object {
-    return nil;
-}
-
-+ (NSArray *)getSwiftProperties:(__unused id)obj {
-    return nil;
-}
-
-+ (NSDictionary *)getOptionalProperties:(__unused id)obj {
-    return nil;
-}
-
-+ (NSArray *)requiredPropertiesForClass:(Class)cls {
-    return [cls requiredProperties];
-}
-
-@end
-
-@implementation RLMSwiftPropertyMetadata
-
-+ (instancetype)metadataForOtherProperty:(NSString *)propertyName {
-    RLMSwiftPropertyMetadata *md = [RLMSwiftPropertyMetadata new];
-    md.propertyName = propertyName;
-    md.kind = RLMSwiftPropertyKindOther;
-    return md;
-}
-
-+ (instancetype)metadataForListProperty:(NSString *)propertyName {
-    RLMSwiftPropertyMetadata *md = [RLMSwiftPropertyMetadata new];
-    md.propertyName = propertyName;
-    md.kind = RLMSwiftPropertyKindList;
-    return md;
-}
-
-+ (instancetype)metadataForLinkingObjectsProperty:(NSString *)propertyName
-                                        className:(NSString *)className
-                               linkedPropertyName:(NSString *)linkedPropertyName {
-    RLMSwiftPropertyMetadata *md = [RLMSwiftPropertyMetadata new];
-    md.propertyName = propertyName;
-    md.className = className;
-    md.linkedPropertyName = linkedPropertyName;
-    md.kind = RLMSwiftPropertyKindLinkingObjects;
-    return md;
-}
-
-+ (instancetype)metadataForOptionalProperty:(NSString *)propertyName type:(RLMPropertyType)type {
-    RLMSwiftPropertyMetadata *md = [RLMSwiftPropertyMetadata new];
-    md.propertyName = propertyName;
-    md.propertyType = type;
-    md.kind = RLMSwiftPropertyKindOptional;
-    return md;
-}
-
-+ (instancetype)metadataForNilLiteralOptionalProperty:(NSString *)propertyName {
-    RLMSwiftPropertyMetadata *md = [RLMSwiftPropertyMetadata new];
-    md.propertyName = propertyName;
-    md.kind = RLMSwiftPropertyKindNilLiteralOptional;
-    return md;
-}
-
-@end
diff --git a/Pods/Realm/Realm/RLMObjectSchema.mm b/Pods/Realm/Realm/RLMObjectSchema.mm
index 91d86f5..4bbd1c1 100644
--- a/Pods/Realm/Realm/RLMObjectSchema.mm
+++ b/Pods/Realm/Realm/RLMObjectSchema.mm
@@ -33,11 +33,6 @@
 
 using namespace realm;
 
-const Ivar RLMDummySwiftIvar = []() {
-    static int dummy;
-    return reinterpret_cast<objc_ivar *>(&dummy);
-}();
-
 // private properties
 @interface RLMObjectSchema ()
 @property (nonatomic, readwrite) NSDictionary<id, RLMProperty *> *allPropertiesByName;
@@ -181,18 +176,21 @@ + (instancetype)schemaForObjectClass:(Class)objectClass {
 }
 
 + (NSArray *)propertiesForClass:(Class)objectClass isSwift:(bool)isSwiftClass {
-    Class objectUtil = [objectClass objectUtilClass:isSwiftClass];
-    NSArray *ignoredProperties = [objectUtil ignoredPropertiesForClass:objectClass];
-    NSDictionary *linkingObjectsProperties = [objectUtil linkingObjectsPropertiesForClass:objectClass];
-    NSDictionary *columnNameMap = [objectClass _realmColumnNames];
-
     // For Swift classes we need an instance of the object when parsing properties
     id swiftObjectInstance = isSwiftClass ? [[objectClass alloc] init] : nil;
 
+    if (NSArray<RLMProperty *> *props = [objectClass _getPropertiesWithInstance:swiftObjectInstance]) {
+        return props;
+    }
+
+    NSArray *ignoredProperties = [objectClass ignoredProperties];
+    NSDictionary *linkingObjectsProperties = [objectClass linkingObjectsProperties];
+    NSDictionary *columnNameMap = [objectClass _realmColumnNames];
+
     unsigned int count;
     std::unique_ptr<objc_property_t[], decltype(&free)> props(class_copyPropertyList(objectClass, &count), &free);
     NSMutableArray<RLMProperty *> *propArray = [NSMutableArray arrayWithCapacity:count];
-    NSSet *indexed = [[NSSet alloc] initWithArray:[objectUtil indexedPropertiesForClass:objectClass]];
+    NSSet *indexed = [[NSSet alloc] initWithArray:[objectClass indexedProperties]];
     for (unsigned int i = 0; i < count; i++) {
         NSString *propertyName = @(property_getName(props[i]));
         if ([ignoredProperties containsObject:propertyName]) {
@@ -222,12 +220,7 @@ + (NSArray *)propertiesForClass:(Class)objectClass isSwift:(bool)isSwiftClass {
         }
     }
 
-    if (isSwiftClass) {
-        [self addSwiftProperties:propArray objectUtil:objectUtil instance:swiftObjectInstance
-                         indexed:indexed nameMap:columnNameMap];
-    }
-
-    if (auto requiredProperties = [objectUtil requiredPropertiesForClass:objectClass]) {
+    if (auto requiredProperties = [objectClass requiredProperties]) {
         for (RLMProperty *property in propArray) {
             bool required = [requiredProperties containsObject:property.name];
             if (required && property.type == RLMPropertyTypeObject && !property.array) {
@@ -248,108 +241,6 @@ + (NSArray *)propertiesForClass:(Class)objectClass isSwift:(bool)isSwiftClass {
     return propArray;
 }
 
-+ (void)addSwiftProperties:(NSMutableArray<RLMProperty *> *)propArray
-                objectUtil:(Class)objectUtil
-                  instance:(id)instance
-                   indexed:(NSSet<NSString *> *)indexed
-                   nameMap:(NSDictionary<NSString *, NSString *> *)columnNameMap {
-    // The property list reported to the obj-c runtime for Swift objects is
-    // incomplete and doesn't include Swift generics like List<> and
-    // RealmOptional<>, and is missing information for some properties that
-    // are reported, such as the difference between `String` and `String?`. To
-    // deal with this, we also get the properties from Swift reflection, and
-    // merge the results.
-
-    NSArray<RLMSwiftPropertyMetadata *> *props = [objectUtil getSwiftProperties:instance];
-    if (!props) {
-        // A Swift subclass of RLMObject, which operates under obj-c rules
-        return;
-    }
-
-    // Track the index that we expect the next property to go in, for inserting
-    // generic properties into the correct place
-    NSUInteger nextIndex = 0;
-    for (RLMSwiftPropertyMetadata *md in props) {
-        // In theory existing should only ever be nextIndex or NSNotFound, and
-        // this search is just a waste of time.
-        // FIXME: verify if this is actually true
-        NSUInteger existing = [propArray indexOfObjectPassingTest:^(RLMProperty *obj, NSUInteger, BOOL *) {
-            return [obj.name isEqualToString:md.propertyName];
-        }];
-
-        RLMProperty *prop;
-        switch (md.kind) {
-            case RLMSwiftPropertyKindList: // List<>
-                prop = [[RLMProperty alloc] initSwiftListPropertyWithName:md.propertyName instance:instance];
-                break;
-            case RLMSwiftPropertyKindLinkingObjects: { // LinkingObjects<>
-                Ivar ivar = class_getInstanceVariable([instance class], md.propertyName.UTF8String);
-                prop = [[RLMProperty alloc] initSwiftLinkingObjectsPropertyWithName:md.propertyName
-                                                                               ivar:ivar
-                                                                    objectClassName:md.className
-                                                             linkOriginPropertyName:md.linkedPropertyName];
-                break;
-            }
-            case RLMSwiftPropertyKindOptional: {
-                if (existing != NSNotFound) {
-                    // String?, Data?, Date? with a non-nil default value
-                    // We already know about this property from obj-c and we
-                    // defaulted to optional, so nothing to do
-                    break;
-                }
-
-                Ivar ivar;
-                if (md.propertyType == RLMPropertyTypeString) {
-                    // FIXME: A non-@objc dynamic String? property which we
-                    // can't actually read so we're always just going to pretend it's nil
-                    // https://github.com/realm/realm-cocoa/issues/5784
-                    ivar = RLMDummySwiftIvar;
-                }
-                else {
-                    // RealmOptional<>
-                    ivar = class_getInstanceVariable([instance class], md.propertyName.UTF8String);
-                }
-
-                prop = [[RLMProperty alloc] initSwiftOptionalPropertyWithName:md.propertyName
-                                                                      indexed:[indexed containsObject:md.propertyName]
-                                                                         ivar:ivar
-                                                                 propertyType:md.propertyType];
-                break;
-            }
-
-            case RLMSwiftPropertyKindOther:
-            case RLMSwiftPropertyKindNilLiteralOptional:
-                // This might be a property which wasn't reported to obj-c and
-                // isn't one of our supported generic types, in which case we
-                // ignore it
-                if (existing == NSNotFound) {
-                    --nextIndex;
-                }
-                // or it might be a String?, Data?, Date? or object field with
-                // a nil default value
-                else if (md.kind == RLMSwiftPropertyKindNilLiteralOptional) {
-                    propArray[existing].optional = true;
-                }
-                // or it may be some non-optional property which may have been
-                // previously marked as optional due to that being the default
-                // in obj-c
-                else {
-                    propArray[existing].optional = false;
-                }
-                break;
-        }
-
-        if (prop) {
-            if (columnNameMap) {
-                prop.columnName = columnNameMap[prop.name];
-            }
-            [propArray insertObject:prop atIndex:nextIndex];
-        }
-
-        ++nextIndex;
-    }
-}
-
 - (id)copyWithZone:(NSZone *)zone {
     RLMObjectSchema *schema = [[RLMObjectSchema allocWithZone:zone] init];
     schema->_objectClass = _objectClass;
diff --git a/Pods/Realm/Realm/RLMObjectStore.mm b/Pods/Realm/Realm/RLMObjectStore.mm
index 232a29b..3625004 100644
--- a/Pods/Realm/Realm/RLMObjectStore.mm
+++ b/Pods/Realm/Realm/RLMObjectStore.mm
@@ -36,14 +36,15 @@
 #import "results.hpp"
 #import "shared_realm.hpp"
 
+#import <realm/group.hpp>
+
 #import <objc/message.h>
 
 using namespace realm;
 
-@interface LinkingObjectsBase : NSObject
-@property (nonatomic, nullable) RLMWeakObjectHandle *object;
-@property (nonatomic, nullable) RLMProperty *property;
-@end
+static_assert(RLMUpdatePolicyError == static_cast<int>(CreatePolicy::ForceCreate), "");
+static_assert(RLMUpdatePolicyUpdateAll == static_cast<int>(CreatePolicy::UpdateAll), "");
+static_assert(RLMUpdatePolicyUpdateChanged == static_cast<int>(CreatePolicy::UpdateModified), "");
 
 void RLMRealmCreateAccessors(RLMSchema *schema) {
     const size_t bufferSize = sizeof("RLM:Managed  ") // includes null terminator
@@ -90,31 +91,33 @@ void RLMInitializeSwiftAccessorGenerics(__unsafe_unretained RLMObjectBase *const
     }
 
     for (RLMProperty *prop in object->_objectSchema.swiftGenericProperties) {
-        if (prop.swiftIvar == RLMDummySwiftIvar) {
-            // FIXME: this should actually be an error as it's the result of an
-            // invalid object definition, but that's a breaking change so
-            // instead preserve the old behavior until the next major version bump
-            // https://github.com/realm/realm-cocoa/issues/5784
-            continue;
-        }
-        id ivar = object_getIvar(object, prop.swiftIvar);
         if (prop.type == RLMPropertyTypeLinkingObjects) {
-            [ivar setObject:(id)[[RLMWeakObjectHandle alloc] initWithObject:object]];
-            [ivar setProperty:prop];
+            [prop.swiftAccessor initializeObject:(char *)(__bridge void *)object + ivar_getOffset(prop.swiftIvar)
+                                          parent:object property:prop];
         }
         else if (prop.array) {
+            id ivar = object_getIvar(object, prop.swiftIvar);
             RLMArray *array = [[RLMManagedArray alloc] initWithParent:object property:prop];
             [ivar set_rlmArray:array];
         }
         else {
+            id ivar = object_getIvar(object, prop.swiftIvar);
             RLMInitializeManagedOptional(ivar, object, prop);
         }
     }
 }
 
+void RLMVerifyHasPrimaryKey(Class cls) {
+    RLMObjectSchema *schema = [cls sharedSchema];
+    if (!schema.primaryKeyProperty) {
+        NSString *reason = [NSString stringWithFormat:@"'%@' does not have a primary key and can not be updated", schema.className];
+        @throw [NSException exceptionWithName:@"RLMException" reason:reason userInfo:nil];
+    }
+}
+
 void RLMAddObjectToRealm(__unsafe_unretained RLMObjectBase *const object,
                          __unsafe_unretained RLMRealm *const realm,
-                         bool createOrUpdate) {
+                         RLMUpdatePolicy updatePolicy) {
     RLMVerifyInWriteTransaction(realm);
 
     // verify that object is unmanaged
@@ -134,13 +137,14 @@ void RLMAddObjectToRealm(__unsafe_unretained RLMObjectBase *const object,
     }
 
     auto& info = realm->_info[object->_objectSchema.className];
-    RLMAccessorContext c{realm, info, true};
+    RLMAccessorContext c{info, true};
     object->_info = &info;
     object->_realm = realm;
     object->_objectSchema = info.rlmObjectSchema;
     try {
         realm::Object::create(c, realm->_realm, *info.objectSchema, (id)object,
-                              createOrUpdate, /* diff */ false, -1, &object->_row);
+                              static_cast<CreatePolicy>(updatePolicy),
+                              -1, &object->_row);
     }
     catch (std::exception const& e) {
         @throw RLMException(e);
@@ -150,10 +154,10 @@ void RLMAddObjectToRealm(__unsafe_unretained RLMObjectBase *const object,
 }
 
 RLMObjectBase *RLMCreateObjectInRealmWithValue(RLMRealm *realm, NSString *className,
-                                               id value, bool createOrUpdate = false) {
+                                               id value, RLMUpdatePolicy updatePolicy) {
     RLMVerifyInWriteTransaction(realm);
 
-    if (createOrUpdate && RLMIsObjectSubclass([value class])) {
+    if (updatePolicy != RLMUpdatePolicyError && RLMIsObjectSubclass([value class])) {
         RLMObjectBase *obj = value;
         if (obj->_realm == realm && [obj->_objectSchema.className isEqualToString:className]) {
             // This is a no-op if value is an RLMObject of the same type already backed by the target realm.
@@ -172,11 +176,11 @@ void RLMAddObjectToRealm(__unsafe_unretained RLMObjectBase *const object,
                             (unsigned long long)info.objectSchema->persisted_properties.size());
     }
 
-    RLMAccessorContext c{realm, info, false};
-    RLMObjectBase *object = RLMCreateManagedAccessor(info.rlmObjectSchema.accessorClass, realm, &info);
+    RLMAccessorContext c{info, false};
+    RLMObjectBase *object = RLMCreateManagedAccessor(info.rlmObjectSchema.accessorClass, &info);
     try {
-        object->_row = realm::Object::create(c, realm->_realm, *info.objectSchema,
-                                             (id)value, createOrUpdate).row();
+        object->_row = realm::Object::create(c, realm->_realm, *info.objectSchema, (id)value,
+                                             static_cast<realm::CreatePolicy>(updatePolicy)).row();
     }
     catch (std::exception const& e) {
         @throw RLMException(e);
@@ -244,29 +248,25 @@ id RLMGetObject(RLMRealm *realm, NSString *objectClassName, id key) {
         RLMValidateValueForProperty(key, info.rlmObjectSchema, prop);
     }
     try {
-        RLMAccessorContext c{realm, info};
+        RLMAccessorContext c{info};
         auto obj = realm::Object::get_for_primary_key(c, realm->_realm, *info.objectSchema,
                                                       key ?: NSNull.null);
         if (!obj.is_valid())
             return nil;
-        return RLMCreateObjectAccessor(realm, info, obj.row());
+        return RLMCreateObjectAccessor(info, obj.row());
     }
     catch (std::exception const& e) {
         @throw RLMException(e);
     }
 }
 
-RLMObjectBase *RLMCreateObjectAccessor(__unsafe_unretained RLMRealm *const realm,
-                                       RLMClassInfo& info,
-                                       NSUInteger index) {
-    return RLMCreateObjectAccessor(realm, info, (*info.table())[index]);
+RLMObjectBase *RLMCreateObjectAccessor(RLMClassInfo& info, NSUInteger index) {
+    return RLMCreateObjectAccessor(info, (*info.table())[index]);
 }
 
 // Create accessor and register with realm
-RLMObjectBase *RLMCreateObjectAccessor(__unsafe_unretained RLMRealm *const realm,
-                                       RLMClassInfo& info,
-                                       realm::RowExpr row) {
-    RLMObjectBase *accessor = RLMCreateManagedAccessor(info.rlmObjectSchema.accessorClass, realm, &info);
+RLMObjectBase *RLMCreateObjectAccessor(RLMClassInfo& info, realm::RowExpr row) {
+    RLMObjectBase *accessor = RLMCreateManagedAccessor(info.rlmObjectSchema.accessorClass, &info);
     accessor->_row = row;
     RLMInitializeSwiftAccessorGenerics(accessor);
     return accessor;
diff --git a/Pods/Realm/Realm/RLMOptionalBase.mm b/Pods/Realm/Realm/RLMOptionalBase.mm
index ab7e0b2..2617f0b 100644
--- a/Pods/Realm/Realm/RLMOptionalBase.mm
+++ b/Pods/Realm/Realm/RLMOptionalBase.mm
@@ -66,7 +66,7 @@ void attach(__unsafe_unretained RLMObjectBase *const obj, NSString *property) {
     : _realm(obj->_realm)
     , _object(obj->_realm->_realm, *obj->_info->objectSchema, obj->_row)
     , _propertyName(prop.name.UTF8String)
-    , _ctx(obj->_realm, *obj->_info)
+    , _ctx(*obj->_info)
     {
     }
 
@@ -75,7 +75,7 @@ id get() override {
     }
 
     void set(__unsafe_unretained id const value) override {
-        _object.set_property_value(_ctx, _propertyName, value ?: NSNull.null, false);
+        _object.set_property_value(_ctx, _propertyName, value ?: NSNull.null);
     }
 
 private:
diff --git a/Pods/Realm/Realm/RLMProperty.mm b/Pods/Realm/Realm/RLMProperty.mm
index 490fadc..7b4e5ec 100644
--- a/Pods/Realm/Realm/RLMProperty.mm
+++ b/Pods/Realm/Realm/RLMProperty.mm
@@ -92,6 +92,10 @@ + (instancetype)propertyForObjectStoreProperty:(const realm::Property &)prop {
     if (is_array(prop.type)) {
         ret->_array = true;
     }
+    if (!prop.public_name.empty()) {
+        ret->_columnName = ret->_name;
+        ret->_name = @(prop.public_name.c_str());
+    }
     return ret;
 }
 
@@ -314,12 +318,6 @@ - (void)parseObjcProperty:(objc_property_t)property
             case 'R':
                 *readOnly = true;
                 break;
-            case 'N':
-                // nonatomic
-                break;
-            case 'D':
-                // dynamic
-                break;
             case 'G':
                 _getterName = @(attrs[i].value);
                 break;
@@ -329,6 +327,25 @@ - (void)parseObjcProperty:(objc_property_t)property
             case 'V': // backing ivar name
                 *computed = false;
                 break;
+
+            case '&':
+                // retain/assign
+                break;
+            case 'C':
+                // copy
+                break;
+            case 'D':
+                // dynamic
+                break;
+            case 'N':
+                // nonatomic
+                break;
+            case 'P':
+                // GC'able
+                break;
+            case 'W':
+                // weak
+                break;
             default:
                 break;
         }
@@ -360,12 +377,26 @@ - (instancetype)initSwiftPropertyWithName:(NSString *)name
     bool readOnly = false;
     bool isComputed = false;
     [self parseObjcProperty:property readOnly:&readOnly computed:&isComputed rawType:&rawType];
+
+    // Swift sometimes doesn't explicitly set the ivar name in the metadata, so check if
+    // there's an ivar with the same name as the property.
+    if (!readOnly && isComputed && class_getInstanceVariable([obj class], name.UTF8String)) {
+        isComputed = false;
+    }
+
+    // Check if there's a storage ivar for a lazy property in this name. We don't honor
+    // @lazy in managed objects, but allow it for unmanaged objects which are
+    // subclasses of RLMObject (but not RealmSwift.Object). It's unclear if there's a
+    // good reason for this difference.
     if (!readOnly && isComputed) {
-        // Check for lazy property.
+        // Xcode 10 and earlier
         NSString *backingPropertyName = [NSString stringWithFormat:@"%@.storage", name];
-        if (class_getInstanceVariable([obj class], backingPropertyName.UTF8String)) {
-            isComputed = false;
-        }
+        isComputed = !class_getInstanceVariable([obj class], backingPropertyName.UTF8String);
+    }
+    if (!readOnly && isComputed) {
+        // Xcode 11
+        NSString *backingPropertyName = [NSString stringWithFormat:@"$__lazy_storage_$_%@", name];
+        isComputed = !class_getInstanceVariable([obj class], backingPropertyName.UTF8String);
     }
 
     if (readOnly || isComputed) {
@@ -488,67 +519,6 @@ - (instancetype)initWithName:(NSString *)name
     return self;
 }
 
-- (instancetype)initSwiftListPropertyWithName:(NSString *)name
-                                     instance:(id)object {
-    self = [super init];
-    if (!self) {
-        return nil;
-    }
-    _name = name;
-    _array = true;
-    _swiftIvar = class_getInstanceVariable([object class], name.UTF8String);
-
-    RLMArray *array = [object_getIvar(object, _swiftIvar) _rlmArray];
-    _type = array.type;
-    _optional = array.optional;
-    _objectClassName = array.objectClassName;
-
-    // no obj-c property for generic lists, and thus no getter/setter names
-
-    return self;
-}
-
-- (instancetype)initSwiftOptionalPropertyWithName:(NSString *)name
-                                          indexed:(BOOL)indexed
-                                             ivar:(Ivar)ivar
-                                     propertyType:(RLMPropertyType)propertyType {
-    self = [super init];
-    if (!self) {
-        return nil;
-    }
-
-    _name = name;
-    _type = propertyType;
-    _indexed = indexed;
-    _swiftIvar = ivar;
-    _optional = true;
-
-    // no obj-c property for generic optionals, and thus no getter/setter names
-
-    return self;
-}
-
-- (instancetype)initSwiftLinkingObjectsPropertyWithName:(NSString *)name
-                                                   ivar:(Ivar)ivar
-                                        objectClassName:(NSString *)objectClassName
-                                 linkOriginPropertyName:(NSString *)linkOriginPropertyName {
-    self = [super init];
-    if (!self) {
-        return nil;
-    }
-
-    _name = name;
-    _type = RLMPropertyTypeLinkingObjects;
-    _array = true;
-    _objectClassName = objectClassName;
-    _linkOriginPropertyName = linkOriginPropertyName;
-    _swiftIvar = ivar;
-
-    // no obj-c property for generic linking objects properties, and thus no getter/setter names
-
-    return self;
-}
-
 - (id)copyWithZone:(NSZone *)zone {
     RLMProperty *prop = [[RLMProperty allocWithZone:zone] init];
     prop->_name = _name;
@@ -565,7 +535,6 @@ - (id)copyWithZone:(NSZone *)zone {
     prop->_swiftIvar = _swiftIvar;
     prop->_optional = _optional;
     prop->_linkOriginPropertyName = _linkOriginPropertyName;
-
     return prop;
 }
 
diff --git a/Pods/Realm/Realm/RLMQueryUtil.mm b/Pods/Realm/Realm/RLMQueryUtil.mm
index 11e3884..93fe03b 100644
--- a/Pods/Realm/Realm/RLMQueryUtil.mm
+++ b/Pods/Realm/Realm/RLMQueryUtil.mm
@@ -842,8 +842,8 @@ void validate_and_extract_between_range(id value, RLMProperty *prop, id *from, i
 // one and ORing them together
 template<typename Func>
 void process_or_group(Query &query, id array, Func&& func) {
-    RLMPrecondition([array conformsToProtocol:@protocol(NSFastEnumeration)],
-                    @"Invalid value", @"IN clause requires an array of items");
+    array = RLMAsFastEnumeration(array);
+    RLMPrecondition(array, @"Invalid value", @"IN clause requires an array of items");
 
     query.group();
 
diff --git a/Pods/Realm/Realm/RLMRealm+Sync.mm b/Pods/Realm/Realm/RLMRealm+Sync.mm
index 159c953..02f10d7 100644
--- a/Pods/Realm/Realm/RLMRealm+Sync.mm
+++ b/Pods/Realm/Realm/RLMRealm+Sync.mm
@@ -47,7 +47,7 @@ - (void)subscribeToObjects:(Class)type where:(NSString *)query callback:(RLMPart
 
         Holder(partial_sync::Subscription&& s) : subscription(std::move(s)) { }
     };
-    auto state = std::make_shared<Holder>(partial_sync::subscribe(Results(_realm, std::move(q)), util::none));
+    auto state = std::make_shared<Holder>(partial_sync::subscribe(Results(_realm, std::move(q)), {}));
     state->token = state->subscription.add_notification_callback([=]() mutable {
         if (!callback) {
             return;
diff --git a/Pods/Realm/Realm/RLMRealm.mm b/Pods/Realm/Realm/RLMRealm.mm
index d077c78..2ec9b2b 100644
--- a/Pods/Realm/Realm/RLMRealm.mm
+++ b/Pods/Realm/Realm/RLMRealm.mm
@@ -32,8 +32,6 @@
 #import "RLMRealmConfiguration_Private.hpp"
 #import "RLMRealmUtil.hpp"
 #import "RLMSchema_Private.hpp"
-#import "RLMSyncManager_Private.h"
-#import "RLMSyncUtil_Private.hpp"
 #import "RLMThreadSafeReference_Private.hpp"
 #import "RLMUpdateChecker.hpp"
 #import "RLMUtil.hpp"
@@ -42,12 +40,20 @@
 #include "object_store.hpp"
 #include "schema.hpp"
 #include "shared_realm.hpp"
+#include "thread_safe_reference.hpp"
 
 #include <realm/disable_sync_to_disk.hpp>
 #include <realm/util/scope_exit.hpp>
 #include <realm/version.hpp>
 
+#if REALM_ENABLE_SYNC
+#import "RLMSyncManager_Private.h"
+#import "RLMSyncSession_Private.hpp"
+#import "RLMSyncUtil_Private.hpp"
+
+#import "sync/async_open_task.hpp"
 #import "sync/sync_session.hpp"
+#endif
 
 using namespace realm;
 using util::File;
@@ -102,6 +108,13 @@ - (void)dealloc {
 }
 @end
 
+#if !REALM_ENABLE_SYNC
+@interface RLMAsyncOpenTask : NSObject
+@end
+@implementation RLMAsyncOpenTask
+@end
+#endif
+
 static bool shouldForciblyDisableEncryption() {
     static bool disableEncryption = getenv("REALM_DISABLE_ENCRYPTION");
     return disableEncryption;
@@ -183,69 +196,123 @@ + (instancetype)realmWithURL:(NSURL *)fileURL {
     return [RLMRealm realmWithConfiguration:configuration error:nil];
 }
 
-+ (void)asyncOpenWithConfiguration:(RLMRealmConfiguration *)configuration
-                     callbackQueue:(dispatch_queue_t)callbackQueue
-                          callback:(RLMAsyncOpenRealmCallback)callback {
-    RLMRealm *strongReferenceToSyncedRealm = nil;
-    if (configuration.config.sync_config) {
-        NSError *error = nil;
-        strongReferenceToSyncedRealm = [RLMRealm uncachedSchemalessRealmWithConfiguration:configuration error:&error];
-        if (error) {
-            dispatch_async(callbackQueue, ^{
-                callback(nil, error);
-            });
-            return;
-        }
-    }
-    static dispatch_queue_t queue = dispatch_queue_create("io.realm.asyncOpenDispatchQueue", DISPATCH_QUEUE_CONCURRENT);
-    dispatch_async(queue, ^{
+// The server doesn't send us the subscriptions for permission types until the
+// first subscription is created. This is fine for synchronous opens (if we're
+// creating a new Realm we create the permission objects ourselves), but it
+// causes issues for asyncOpen because it means that when our download completes
+// we don't actually have the full Realm state yet.
+static void waitForPartialSyncSubscriptions(Realm::Config const& config) {
+#if REALM_ENABLE_SYNC
+    auto realm = Realm::get_shared_realm(config);
+    auto table = ObjectStore::table_for_object_type(realm->read_group(), "__ResultSets");
+
+    realm->begin_transaction();
+    size_t row = realm::sync::create_object(realm->read_group(), *table);
+
+    // Set expires_at to time 0 so that this object will be cleaned up the first
+    // time the user creates a subscription
+    size_t expires_at_col = table->get_column_index("expires_at");
+    if (expires_at_col == npos) {
+        expires_at_col = table->add_column(type_Timestamp, "expires_at", true);
+    }
+    table->set_timestamp(expires_at_col, row, Timestamp(0, 0));
+    realm->commit_transaction();
+
+    NotificationToken token;
+    Results results(realm, *table);
+    CFRunLoopRef runLoop = CFRunLoopGetCurrent();
+    CFRunLoopPerformBlock(runLoop, kCFRunLoopDefaultMode, [&]() mutable {
+        token = results.add_notification_callback([&](CollectionChangeSet const&, std::exception_ptr) mutable {
+            if (table->size() > 1) {
+                token = {};
+                CFRunLoopStop(runLoop);
+            }
+        });
+    });
+    CFRunLoopRun();
+#else
+    static_cast<void>(config);
+#endif
+}
+
+static dispatch_queue_t s_async_open_queue = dispatch_queue_create("io.realm.asyncOpenDispatchQueue",
+                                                                   DISPATCH_QUEUE_CONCURRENT);
+void RLMSetAsyncOpenQueue(dispatch_queue_t queue) {
+    s_async_open_queue = queue;
+}
+
++ (RLMAsyncOpenTask *)asyncOpenWithConfiguration:(RLMRealmConfiguration *)configuration
+                                   callbackQueue:(dispatch_queue_t)callbackQueue
+                                        callback:(RLMAsyncOpenRealmCallback)callback {
+    auto openCompletion = [=](ThreadSafeReference<Realm> ref, std::exception_ptr err) {
         @autoreleasepool {
-            if (strongReferenceToSyncedRealm) {
-                // Sync behavior: get the raw session, then wait for it to download.
-                if (auto session = sync_session_for_realm(strongReferenceToSyncedRealm)) {
-                    // Wait for the session to download, then open it.
-                    session->wait_for_download_completion([=](std::error_code error_code) {
-                        dispatch_async(callbackQueue, ^{
-                            (void)strongReferenceToSyncedRealm;
-                            NSError *error = nil;
-                            if (error_code == std::error_code{}) {
-                                // Success
-                                @autoreleasepool {
-                                    // Try opening the Realm on the destination queue.
-                                    RLMRealm *localRealm = [RLMRealm realmWithConfiguration:configuration error:&error];
-                                    callback(localRealm, error);
-                                }
-                            } else {
-                                // Failure
-                                callback(nil, make_sync_error(RLMSyncSystemErrorKindSession,
-                                                              @(error_code.message().c_str()),
-                                                              error_code.value(),
-                                                              nil));
-                            }
-                        });
-                    });
-                } else {
+            if (err) {
+                try {
+                    std::rethrow_exception(err);
+                }
+                catch (...) {
+                    NSError *error;
+                    RLMRealmTranslateException(&error);
                     dispatch_async(callbackQueue, ^{
-                        callback(nil, make_sync_error(RLMSyncSystemErrorKindSession,
-                                                      @"Cannot asynchronously open synced Realm, because the associated session previously experienced a fatal error",
-                                                      NSNotFound,
-                                                      nil));
+                        callback(nil, error);
                     });
-                    return;
                 }
-            } else {
-                // Default behavior: just dispatch onto the destination queue and open the Realm.
+                return;
+            }
+
+            auto complete = ^{
                 dispatch_async(callbackQueue, ^{
                     @autoreleasepool {
-                        NSError *error = nil;
+                        NSError *error;
                         RLMRealm *localRealm = [RLMRealm realmWithConfiguration:configuration error:&error];
                         callback(localRealm, error);
                     }
                 });
-                return;
+            };
+
+            auto realm = Realm::get_shared_realm(std::move(ref));
+            bool needsSubscriptions = realm->is_partial() && ObjectStore::table_for_object_type(realm->read_group(), "__ResultSets")->size() == 0;
+            if (needsSubscriptions) {
+                // We need to dispatch back to the work queue to wait for the
+                // subscriptions as we're currently running on the sync worker
+                // thread and blocking it to wait for subscriptions means no syncing
+                dispatch_async(s_async_open_queue, ^{
+                    @autoreleasepool {
+                        waitForPartialSyncSubscriptions(realm->config());
+                        complete();
+                    }
+                });
+            }
+            else {
+                complete();
+            }
+        }
+    };
+
+    RLMAsyncOpenTask *ret = [RLMAsyncOpenTask new];
+    dispatch_async(s_async_open_queue, ^{
+        @autoreleasepool {
+            Realm::Config& config = configuration.config;
+            if (config.sync_config) {
+#if REALM_ENABLE_SYNC
+                auto task = realm::Realm::get_synchronized_realm(config);
+                ret.task = task;
+                task->start(openCompletion);
+#else
+                @throw RLMException(@"Realm was not built with sync enabled");
+#endif
+            }
+            else {
+                try {
+                    openCompletion(realm::_impl::RealmCoordinator::get_coordinator(config)->get_unbound_realm(), nullptr);
+                }
+                catch (...) {
+                    openCompletion({}, std::current_exception());
+                }
             }
         }
     });
+    return ret;
 }
 
 // ARC tries to eliminate calls to autorelease when the value is then immediately
@@ -389,7 +456,7 @@ + (instancetype)realmWithConfiguration:(RLMRealmConfiguration *)configuration er
     configuration = [configuration copy];
     Realm::Config& config = configuration.config;
 
-    RLMRealm *realm = [[RLMRealm alloc] initPrivate];
+    RLMRealm *realm = [[self alloc] initPrivate];
     realm->_dynamic = dynamic;
 
     // protects the realm cache and accessors cache
@@ -580,15 +647,8 @@ - (void)commitWriteTransaction {
     [self commitWriteTransaction:nil];
 }
 
-- (BOOL)commitWriteTransaction:(NSError **)outError {
-    try {
-        _realm->commit_transaction();
-        return YES;
-    }
-    catch (...) {
-        RLMRealmTranslateException(outError);
-        return NO;
-    }
+- (BOOL)commitWriteTransaction:(NSError **)error {
+    return [self commitWriteTransactionWithoutNotifying:@[] error:error];
 }
 
 - (BOOL)commitWriteTransactionWithoutNotifying:(NSArray<RLMNotificationToken *> *)tokens error:(NSError **)error {
@@ -614,10 +674,18 @@ - (void)transactionWithBlock:(__attribute__((noescape)) void(^)(void))block {
 }
 
 - (BOOL)transactionWithBlock:(__attribute__((noescape)) void(^)(void))block error:(NSError **)outError {
+    return [self transactionWithoutNotifying:@[] block:block error:outError];
+}
+
+- (void)transactionWithoutNotifying:(NSArray<RLMNotificationToken *> *)tokens block:(__attribute__((noescape)) void(^)(void))block {
+    [self transactionWithoutNotifying:tokens block:block error:nil];
+}
+
+- (BOOL)transactionWithoutNotifying:(NSArray<RLMNotificationToken *> *)tokens block:(__attribute__((noescape)) void(^)(void))block error:(NSError **)error {
     [self beginWriteTransaction];
     block();
     if (_realm->is_in_transaction()) {
-        return [self commitWriteTransaction:outError];
+        return [self commitWriteTransactionWithoutNotifying:tokens error:error];
     }
     return YES;
 }
@@ -712,7 +780,7 @@ - (BOOL)refresh {
 }
 
 - (void)addObject:(__unsafe_unretained RLMObject *const)object {
-    RLMAddObjectToRealm(object, self, false);
+    RLMAddObjectToRealm(object, self, RLMUpdatePolicyError);
 }
 
 - (void)addObjects:(id<NSFastEnumeration>)objects {
@@ -731,7 +799,7 @@ - (void)addOrUpdateObject:(RLMObject *)object {
         @throw RLMException(@"'%@' does not have a primary key and can not be updated", object.objectSchema.className);
     }
 
-    RLMAddObjectToRealm(object, self, true);
+    RLMAddObjectToRealm(object, self, RLMUpdatePolicyUpdateAll);
 }
 
 - (void)addOrUpdateObjects:(id<NSFastEnumeration>)objects {
@@ -837,7 +905,7 @@ + (BOOL)performMigrationForConfiguration:(RLMRealmConfiguration *)configuration
 }
 
 - (RLMObject *)createObject:(NSString *)className withValue:(id)value {
-    return (RLMObject *)RLMCreateObjectInRealmWithValue(self, className, value, false);
+    return (RLMObject *)RLMCreateObjectInRealmWithValue(self, className, value, RLMUpdatePolicyError);
 }
 
 - (BOOL)writeCopyToURL:(NSURL *)fileURL encryptionKey:(NSData *)key error:(NSError **)error {
@@ -860,6 +928,45 @@ - (BOOL)writeCopyToURL:(NSURL *)fileURL encryptionKey:(NSData *)key error:(NSErr
     return NO;
 }
 
++ (BOOL)fileExistsForConfiguration:(RLMRealmConfiguration *)config {
+    return [NSFileManager.defaultManager fileExistsAtPath:config.pathOnDisk];
+}
+
++ (BOOL)deleteFilesForConfiguration:(RLMRealmConfiguration *)config error:(NSError **)error {
+    auto& path = config.config.path;
+    bool anyDeleted = false;
+    NSError *localError;
+    bool didCall = SharedGroup::call_with_lock(path, [&](auto const& path) {
+        NSURL *url = [NSURL fileURLWithPath:@(path.c_str())];
+        NSFileManager *fm = NSFileManager.defaultManager;
+
+        anyDeleted = [fm removeItemAtURL:url error:&localError];
+        if (localError && localError.code != NSFileNoSuchFileError) {
+            return;
+        }
+
+        [fm removeItemAtURL:[url URLByAppendingPathExtension:@"management"] error:&localError];
+        if (localError && localError.code != NSFileNoSuchFileError) {
+            return;
+        }
+
+        [fm removeItemAtURL:[url URLByAppendingPathExtension:@"note"] error:&localError];
+    });
+    if (error && localError && localError.code != NSFileNoSuchFileError) {
+        *error = localError;
+    }
+    else if (!didCall) {
+        if (error) {
+            NSString *msg = [NSString stringWithFormat:@"Realm file at path %s cannot be deleted because it is currently opened.", path.c_str()];
+            *error = [NSError errorWithDomain:RLMErrorDomain
+                                         code:RLMErrorAlreadyOpen
+                                     userInfo:@{NSLocalizedDescriptionKey: msg}];
+        }
+    }
+    return anyDeleted;
+}
+
+#if REALM_ENABLE_SYNC
 using Privilege = realm::ComputedPrivileges;
 static bool hasPrivilege(realm::ComputedPrivileges actual, realm::ComputedPrivileges expected) {
     return (static_cast<int>(actual) & static_cast<int>(expected)) == static_cast<int>(expected);
@@ -903,6 +1010,7 @@ - (RLMClassPrivileges)privilegesForClassNamed:(NSString *)className {
         .create = hasPrivilege(p, Privilege::Create),
     };
 }
+#endif
 
 - (void)registerEnumerator:(RLMFastEnumerator *)enumerator {
     if (!_collectionEnumerators) {
diff --git a/Pods/Realm/Realm/RLMRealmConfiguration.mm b/Pods/Realm/Realm/RLMRealmConfiguration.mm
index 3635f81..114b8d6 100644
--- a/Pods/Realm/Realm/RLMRealmConfiguration.mm
+++ b/Pods/Realm/Realm/RLMRealmConfiguration.mm
@@ -25,7 +25,12 @@
 
 #import "schema.hpp"
 #import "shared_realm.hpp"
+
+#if REALM_ENABLE_SYNC
 #import "sync/sync_config.hpp"
+#else
+@class RLMSyncConfiguration;
+#endif
 
 static NSString *const c_RLMRealmConfigurationProperties[] = {
     @"fileURL",
@@ -190,16 +195,20 @@ - (void)setEncryptionKey:(NSData * __nullable)encryptionKey {
     if (NSData *key = RLMRealmValidatedEncryptionKey(encryptionKey)) {
         auto bytes = static_cast<const char *>(key.bytes);
         _config.encryption_key.assign(bytes, bytes + key.length);
+#if REALM_ENABLE_SYNC
         if (_config.sync_config) {
             auto& sync_encryption_key = self.config.sync_config->realm_encryption_key;
             sync_encryption_key = std::array<char, 64>();
             std::copy_n(_config.encryption_key.begin(), 64, sync_encryption_key->begin());
         }
+#endif
     }
     else {
         _config.encryption_key.clear();
+#if REALM_ENABLE_SYNC
         if (_config.sync_config)
             _config.sync_config->realm_encryption_key = realm::util::none;
+#endif
     }
 }
 
@@ -300,4 +309,10 @@ - (void)setCustomSchemaWithoutCopying:(RLMSchema *)schema {
     _customSchema = schema;
 }
 
+#if !REALM_ENABLE_SYNC
+- (RLMSyncConfiguration *)syncConfiguration {
+    return nil;
+}
+#endif
+
 @end
diff --git a/Pods/Realm/Realm/RLMResults.mm b/Pods/Realm/Realm/RLMResults.mm
index de086ce..77b1471 100644
--- a/Pods/Realm/Realm/RLMResults.mm
+++ b/Pods/Realm/Realm/RLMResults.mm
@@ -208,7 +208,7 @@ - (NSUInteger)indexOfObjectWithPredicate:(NSPredicate *)predicate {
 }
 
 - (id)objectAtIndex:(NSUInteger)index {
-    RLMAccessorContext ctx(_realm, *_info);
+    RLMAccessorContext ctx(*_info);
     return translateRLMResultsErrors([&] {
         return _results.get(ctx, index);
     });
@@ -218,7 +218,7 @@ - (id)firstObject {
     if (!_info) {
         return nil;
     }
-    RLMAccessorContext ctx(_realm, *_info);
+    RLMAccessorContext ctx(*_info);
     return translateRLMResultsErrors([&] {
         return _results.first(ctx);
     });
@@ -228,7 +228,7 @@ - (id)lastObject {
     if (!_info) {
         return nil;
     }
-    RLMAccessorContext ctx(_realm, *_info);
+    RLMAccessorContext ctx(*_info);
     return translateRLMResultsErrors([&] {
         return _results.last(ctx);
     });
@@ -238,7 +238,7 @@ - (NSUInteger)indexOfObject:(RLMObject *)object {
     if (!_info || !object || (!object->_realm && !object.invalidated)) {
         return NSNotFound;
     }
-    RLMAccessorContext ctx(_realm, *_info);
+    RLMAccessorContext ctx(*_info);
     return translateRLMResultsErrors([&] {
         return RLMConvertNotFound(_results.index_of(ctx, object));
     });
@@ -273,7 +273,7 @@ - (id)valueForKey:(NSString *)key {
         return @[];
     }
     return translateRLMResultsErrors([&] {
-        return RLMCollectionValueForKey(_results, key, _realm, *_info);
+        return RLMCollectionValueForKey(_results, key, *_info);
     });
 }
 
@@ -309,7 +309,7 @@ - (NSNumber *)_avgForKeyPath:(NSString *)keyPath {
 - (NSArray *)_unionOfObjectsForKeyPath:(NSString *)keyPath {
     assertKeyPathIsNotNested(keyPath);
     return translateRLMResultsErrors([&] {
-        return RLMCollectionValueForKey(_results, keyPath, _realm, *_info);
+        return RLMCollectionValueForKey(_results, keyPath, *_info);
     });
 }
 
@@ -325,7 +325,7 @@ - (NSArray *)_unionOfArraysForKeyPath:(NSString *)keyPath {
 
     return translateRLMResultsErrors([&] {
         NSMutableArray *flatArray = [NSMutableArray new];
-        for (id<NSFastEnumeration> array in RLMCollectionValueForKey(_results, keyPath, _realm, *_info)) {
+        for (id<NSFastEnumeration> array in RLMCollectionValueForKey(_results, keyPath, *_info)) {
             for (id value in array) {
                 [flatArray addObject:value];
             }
@@ -472,7 +472,7 @@ - (NSString *)description {
 - (RLMFastEnumerator *)fastEnumerator {
     return translateRLMResultsErrors([&] {
         return [[RLMFastEnumerator alloc] initWithResults:_results collection:self
-                                                    realm:_realm classInfo:*_info];
+                                                classInfo:*_info];
     });
 }
 
@@ -483,6 +483,9 @@ - (RLMFastEnumerator *)fastEnumerator {
 #pragma clang diagnostic push
 #pragma clang diagnostic ignored "-Wmismatched-parameter-types"
 - (RLMNotificationToken *)addNotificationBlock:(void (^)(RLMResults *, RLMCollectionChange *, NSError *))block {
+    if (!_realm) {
+        @throw RLMException(@"Linking objects notifications are only supported on managed objects.");
+    }
     [_realm verifyNotificationsAreSupported:true];
     return RLMAddNotificationBlock(self, _results, block, true);
 }
diff --git a/Pods/Realm/Realm/RLMSchema.mm b/Pods/Realm/Realm/RLMSchema.mm
index d32440b..0787125 100644
--- a/Pods/Realm/Realm/RLMSchema.mm
+++ b/Pods/Realm/Realm/RLMSchema.mm
@@ -105,6 +105,9 @@ static void RLMRegisterClassLocalNames(Class *classes, NSUInteger count) {
         if (!RLMIsObjectSubclass(cls)) {
             continue;
         }
+        if ([cls _realmIgnoreClass]) {
+            continue;
+        }
 
         NSString *className = NSStringFromClass(cls);
         if ([className hasPrefix:@"RLM:"] || [className hasPrefix:@"NSKVONotifying"]) {
diff --git a/Pods/Realm/Realm/RLMSyncConfiguration.mm b/Pods/Realm/Realm/RLMSyncConfiguration.mm
index fa48291..b082477 100644
--- a/Pods/Realm/Realm/RLMSyncConfiguration.mm
+++ b/Pods/Realm/Realm/RLMSyncConfiguration.mm
@@ -68,8 +68,7 @@ - (instancetype)initWithUser:(RLMSyncUser *)user
                     realmURL:(NSURL *)url
                customFileURL:(nullable NSURL *)customFileURL
                    isPartial:(BOOL)isPartial
-                  stopPolicy:(RLMSyncStopPolicy)stopPolicy
-                errorHandler:(std::function<realm::SyncSessionErrorHandler>)errorHandler;
+                  stopPolicy:(RLMSyncStopPolicy)stopPolicy;
 @end
 
 @implementation RLMSyncConfiguration
@@ -106,6 +105,10 @@ - (void)setIsPartial:(BOOL)isPartial {
     _config->is_partial = (bool)isPartial;
 }
 
+- (BOOL)isPartial {
+    return (BOOL)_config->is_partial;
+}
+
 - (NSURL *)pinnedCertificateURL {
     if (auto& path = _config->ssl_trust_certificate_path) {
         return [NSURL fileURLWithPath:RLMStringDataToNSString(*path)];
@@ -127,11 +130,6 @@ - (void)setPinnedCertificateURL:(NSURL *)pinnedCertificateURL {
     }
 }
 
-
-- (BOOL)isPartial {
-    return (BOOL)_config->is_partial;
-}
-
 - (void)setFullSynchronization:(BOOL)fullSynchronization {
     _config->is_partial = !(bool)fullSynchronization;
 }
@@ -140,7 +138,7 @@ - (BOOL)fullSynchronization {
     return !(BOOL)_config->is_partial;
 }
 
-- (realm::SyncConfig)rawConfiguration {
+- (realm::SyncConfig&)rawConfiguration {
     return *_config;
 }
 
@@ -171,6 +169,14 @@ - (void)setUrlPrefix:(NSString *)urlPrefix {
     }
 }
 
+- (bool)cancelAsyncOpenOnNonFatalErrors {
+    return _config->cancel_waits_on_nonfatal_error;
+}
+
+- (void)setCancelAsyncOpenOnNonFatalErrors:(bool)cancelAsyncOpenOnNonFatalErrors {
+    _config->cancel_waits_on_nonfatal_error = cancelAsyncOpenOnNonFatalErrors;
+}
+
 - (NSURL *)realmURL {
     NSString *rawStringURL = @(_config->reference_realm_url.c_str());
     return [NSURL URLWithString:rawStringURL];
@@ -181,8 +187,7 @@ - (instancetype)initWithUser:(RLMSyncUser *)user realmURL:(NSURL *)url {
                      realmURL:url
                 customFileURL:nil
                     isPartial:NO
-                   stopPolicy:RLMSyncStopPolicyAfterChangesUploaded
-                 errorHandler:nullptr];
+                   stopPolicy:RLMSyncStopPolicyAfterChangesUploaded];
 }
 
 - (instancetype)initWithUser:(RLMSyncUser *)user
@@ -196,63 +201,91 @@ - (instancetype)initWithUser:(RLMSyncUser *)user
                             realmURL:url
                        customFileURL:nil
                            isPartial:isPartial
-                          stopPolicy:stopPolicy
-                        errorHandler:nullptr];
+                          stopPolicy:stopPolicy];
     config.urlPrefix = urlPrefix;
     config.enableSSLValidation = enableSSLValidation;
     config.pinnedCertificateURL = certificatePath;
     return config;
 }
 
+static void bindHandler(std::string const&, SyncConfig const& config, std::shared_ptr<SyncSession> session) {
+    const std::shared_ptr<SyncUser>& user = config.user;
+    NSURL *realmURL = [NSURL URLWithString:@(config.realm_url().c_str())];
+    NSString *path = [realmURL path];
+    REALM_ASSERT(realmURL && path);
+    auto handle = [[RLMSyncSessionRefreshHandle alloc] initWithRealmURL:realmURL
+                                                                   user:user
+                                                                session:std::move(session)
+                                                        completionBlock:RLMSyncManager.sharedManager.sessionCompletionNotifier];
+    context_for(user).register_refresh_handle([path UTF8String], handle);
+}
+
+static void errorHandler(std::shared_ptr<SyncSession> errored_session, SyncError error) {
+    NSString *recoveryPath;
+    RLMSyncErrorActionToken *token;
+    for (auto& pair : error.user_info) {
+        if (pair.first == realm::SyncError::c_original_file_path_key) {
+            token = [[RLMSyncErrorActionToken alloc] initWithOriginalPath:pair.second];
+        }
+        else if (pair.first == realm::SyncError::c_recovery_file_path_key) {
+            recoveryPath = @(pair.second.c_str());
+        }
+    }
+
+    BOOL shouldMakeError = YES;
+    NSDictionary *custom = nil;
+    // Note that certain types of errors are 'interactive'; users have several options
+    // as to how to proceed after the error is reported.
+    auto errorClass = errorKindForSyncError(error);
+    switch (errorClass) {
+        case RLMSyncSystemErrorKindClientReset: {
+            custom = @{kRLMSyncPathOfRealmBackupCopyKey: recoveryPath, kRLMSyncErrorActionTokenKey: token};
+            break;
+        }
+        case RLMSyncSystemErrorKindPermissionDenied: {
+            custom = @{kRLMSyncErrorActionTokenKey: token};
+            break;
+        }
+        case RLMSyncSystemErrorKindUser:
+        case RLMSyncSystemErrorKindSession:
+            break;
+        case RLMSyncSystemErrorKindConnection:
+        case RLMSyncSystemErrorKindClient:
+        case RLMSyncSystemErrorKindUnknown:
+            // Report the error. There's nothing the user can do about it, though.
+            shouldMakeError = error.is_fatal;
+            break;
+    }
+    auto errorHandler = RLMSyncManager.sharedManager.errorHandler;
+    if (!shouldMakeError || !errorHandler) {
+        return;
+    }
+    NSError *nsError = make_sync_error(errorClass, @(error.message.c_str()), error.error_code.value(), custom);
+    RLMSyncSession *session = [[RLMSyncSession alloc] initWithSyncSession:errored_session];
+    dispatch_async(dispatch_get_main_queue(), ^{
+        errorHandler(nsError, session);
+    });
+};
+
 - (instancetype)initWithUser:(RLMSyncUser *)user
                     realmURL:(NSURL *)url
                customFileURL:(nullable NSURL *)customFileURL
                    isPartial:(BOOL)isPartial
-                  stopPolicy:(RLMSyncStopPolicy)stopPolicy
-                errorHandler:(std::function<realm::SyncSessionErrorHandler>)errorHandler {
+                  stopPolicy:(RLMSyncStopPolicy)stopPolicy {
     if (self = [super init]) {
         if (!isValidRealmURL(url)) {
             @throw RLMException(@"The provided URL (%@) was not a valid Realm URL.", [url absoluteString]);
         }
-        auto bindHandler = [=](auto&,
-                               const SyncConfig& config,
-                               const std::shared_ptr<SyncSession>& session) {
-            const std::shared_ptr<SyncUser>& user = config.user;
-            NSURL *realmURL = [NSURL URLWithString:@(config.realm_url().c_str())];
-            NSString *path = [realmURL path];
-            REALM_ASSERT(realmURL && path);
-            RLMSyncSessionRefreshHandle *handle = [[RLMSyncSessionRefreshHandle alloc] initWithRealmURL:realmURL
-                                                                                                   user:user
-                                                                                                session:std::move(session)
-                                                                                        completionBlock:[RLMSyncManager sharedManager].sessionCompletionNotifier];
-            context_for(user).register_refresh_handle([path UTF8String], handle);
-        };
-        if (!errorHandler) {
-            errorHandler = [=](std::shared_ptr<SyncSession> errored_session,
-                               SyncError error) {
-                RLMSyncSession *session = [[RLMSyncSession alloc] initWithSyncSession:errored_session];
-                NSMutableDictionary *userInfo = [NSMutableDictionary dictionaryWithCapacity:error.user_info.size()];
-                for (auto& pair : error.user_info) {
-                    userInfo[@(pair.first.c_str())] = @(pair.second.c_str());
-                }
-                // FIXME: how should the binding respond if the `is_fatal` bool is true?
-                [[RLMSyncManager sharedManager] _fireErrorWithCode:error.error_code.value()
-                                                           message:@(error.message.c_str())
-                                                           isFatal:error.is_fatal
-                                                           session:session
-                                                          userInfo:userInfo
-                                                        errorClass:errorKindForSyncError(error)];
-            };
-        }
 
         _config = std::make_unique<SyncConfig>(SyncConfig{
             [user _syncUser],
             [[url absoluteString] UTF8String]
         });
         _config->stop_policy = translateStopPolicy(stopPolicy);
-        _config->bind_session_handler = std::move(bindHandler);
-        _config->error_handler = std::move(errorHandler);
+        _config->bind_session_handler = bindHandler;
+        _config->error_handler = errorHandler;
         _config->is_partial = isPartial;
+        _config->client_resync_mode = realm::ClientResyncMode::Manual;
 
         if (NSString *authorizationHeaderName = [RLMSyncManager sharedManager].authorizationHeaderName) {
             _config->authorization_header_name.emplace(authorizationHeaderName.UTF8String);
@@ -281,8 +314,7 @@ + (RLMRealmConfiguration *)automaticConfigurationForUser:(RLMSyncUser *)user {
                                                                          realmURL:user.defaultRealmURL
                                                                     customFileURL:nil
                                                                         isPartial:YES
-                                                                       stopPolicy:RLMSyncStopPolicyAfterChangesUploaded
-                                                                     errorHandler:nullptr];
+                                                                       stopPolicy:RLMSyncStopPolicyAfterChangesUploaded];
     RLMRealmConfiguration *config = [[RLMRealmConfiguration alloc] init];
     config.syncConfiguration = syncConfig;
     return config;
diff --git a/Pods/Realm/Realm/RLMSyncCredentials.m b/Pods/Realm/Realm/RLMSyncCredentials.m
index a1521a2..480c539 100644
--- a/Pods/Realm/Realm/RLMSyncCredentials.m
+++ b/Pods/Realm/Realm/RLMSyncCredentials.m
@@ -32,6 +32,7 @@
 RLMIdentityProvider const RLMIdentityProviderJWT                    = @"jwt";
 RLMIdentityProvider const RLMIdentityProviderAnonymous              = @"anonymous";
 RLMIdentityProvider const RLMIdentityProviderNickname               = @"nickname";
+RLMIdentityProvider const RLMIdentityProviderCustomRefreshToken     = @"customrefreshtoken";
 
 @interface RLMSyncCredentials ()
 
@@ -95,6 +96,17 @@ + (instancetype)credentialsWithAccessToken:(RLMServerToken)accessToken identity:
                                     userInfo:@{kRLMSyncIdentityKey: identity}];
 }
 
++ (instancetype)credentialsWithCustomRefreshToken:(NSString *)token identity:(NSString *)identity isAdmin:(BOOL)isAdmin {
+    NSDictionary *userInfo = @{
+        kRLMSyncIdentityKey: identity,
+        kRLMSyncIsAdminKey: @(isAdmin)
+    };
+    return [[self alloc] initWithCustomToken:token
+                                    provider:RLMIdentityProviderCustomRefreshToken
+                                    userInfo:userInfo];
+
+}
+
 - (BOOL)isEqual:(id)object {
     if (![object isKindOfClass:[RLMSyncCredentials class]]) {
         return NO;
diff --git a/Pods/Realm/Realm/RLMSyncManager.mm b/Pods/Realm/Realm/RLMSyncManager.mm
index 8fbb205..cb2e1d3 100644
--- a/Pods/Realm/Realm/RLMSyncManager.mm
+++ b/Pods/Realm/Realm/RLMSyncManager.mm
@@ -68,6 +68,8 @@ RLMSyncLogLevel logLevelForLevel(Level logLevel) {
     REALM_UNREACHABLE();    // Unrecognized log level.
 }
 
+#pragma mark - Loggers
+
 struct CocoaSyncLogger : public realm::util::RootLogger {
     void do_log(Level, std::string message) override {
         NSLog(@"Sync: %@", RLMStringDataToNSString(message));
@@ -82,21 +84,53 @@ void do_log(Level, std::string message) override {
     }
 } s_syncLoggerFactory;
 
+struct CallbackLogger : public realm::util::RootLogger {
+    RLMSyncLogFunction logFn;
+    void do_log(Level level, std::string message) override {
+        @autoreleasepool {
+            logFn(logLevelForLevel(level), RLMStringDataToNSString(message));
+        }
+    }
+};
+struct CallbackLoggerFactory : public realm::SyncLoggerFactory {
+    RLMSyncLogFunction logFn;
+    std::unique_ptr<realm::util::Logger> make_logger(realm::util::Logger::Level level) override {
+        auto logger = std::make_unique<CallbackLogger>();
+        logger->logFn = logFn;
+        logger->set_level_threshold(level);
+        return std::move(logger); // not a redundant move because it's a different type
+    }
+
+    CallbackLoggerFactory(RLMSyncLogFunction logFn) : logFn(logFn) { }
+};
+
 } // anonymous namespace
 
-@interface RLMSyncManager ()
-- (instancetype)initWithCustomRootDirectory:(nullable NSURL *)rootDirectory NS_DESIGNATED_INITIALIZER;
+#pragma mark - RLMSyncManager
+
+@interface RLMSyncTimeoutOptions () {
+    @public
+    realm::SyncClientTimeouts _options;
+}
 @end
 
-@implementation RLMSyncManager
+@implementation RLMSyncManager {
+    std::unique_ptr<CallbackLoggerFactory> _loggerFactory;
+}
 
 static RLMSyncManager *s_sharedManager = nil;
 
+- (instancetype)initPrivate {
+    return self = [super init];
+}
+
 + (instancetype)sharedManager {
     static std::once_flag flag;
     std::call_once(flag, [] {
         try {
-            s_sharedManager = [[RLMSyncManager alloc] initWithCustomRootDirectory:nil];
+            [RLMSyncUser _setUpBindingContextFactory];
+            s_sharedManager = [[RLMSyncManager alloc] initPrivate];
+            [s_sharedManager configureWithRootDirectory:nil];
         }
         catch (std::exception const& e) {
             @throw RLMException(e);
@@ -105,25 +139,23 @@ + (instancetype)sharedManager {
     return s_sharedManager;
 }
 
-- (instancetype)initWithCustomRootDirectory:(NSURL *)rootDirectory {
-    if (self = [super init]) {
-        [RLMSyncUser _setUpBindingContextFactory];
-
-        // Initialize the sync engine.
-        SyncManager::shared().set_logger_factory(s_syncLoggerFactory);
-        bool should_encrypt = !getenv("REALM_DISABLE_METADATA_ENCRYPTION") && !RLMIsRunningInPlayground();
-        auto mode = should_encrypt ? SyncManager::MetadataMode::Encryption : SyncManager::MetadataMode::NoEncryption;
+- (void)configureWithRootDirectory:(NSURL *)rootDirectory {
+    SyncClientConfig config;
+    bool should_encrypt = !getenv("REALM_DISABLE_METADATA_ENCRYPTION") && !RLMIsRunningInPlayground();
+    config.logger_factory = &s_syncLoggerFactory;
+    config.metadata_mode = should_encrypt ? SyncManager::MetadataMode::Encryption
+                                          : SyncManager::MetadataMode::NoEncryption;
+    @autoreleasepool {
         rootDirectory = rootDirectory ?: [NSURL fileURLWithPath:RLMDefaultDirectoryForBundleIdentifier(nil)];
-        @autoreleasepool {
-            bool isSwift = !!NSClassFromString(@"RealmSwiftObjectUtil");
-            auto userAgent = [[NSMutableString alloc] initWithFormat:@"Realm%@/%@",
-                              isSwift ? @"Swift" : @"ObjectiveC", REALM_COCOA_VERSION];
-            SyncManager::shared().configure(rootDirectory.path.UTF8String, mode, RLMStringDataWithNSString(userAgent), none, true);
-            SyncManager::shared().set_user_agent(RLMStringDataWithNSString(self.appID));
-        }
-        return self;
+        config.base_file_path = rootDirectory.path.UTF8String;
+
+        bool isSwift = !!NSClassFromString(@"RealmSwiftObjectUtil");
+        config.user_agent_binding_info =
+            util::format("Realm%1/%2", isSwift ? "Swift" : "ObjectiveC",
+                         RLMStringDataWithNSString(REALM_COCOA_VERSION));
+        config.user_agent_application_info = RLMStringDataWithNSString(self.appID);
     }
-    return nil;
+    SyncManager::shared().configure(config);
 }
 
 - (NSString *)appID {
@@ -138,6 +170,38 @@ - (void)setUserAgent:(NSString *)userAgent {
     _userAgent = userAgent;
 }
 
+- (void)setCustomRequestHeaders:(NSDictionary<NSString *,NSString *> *)customRequestHeaders {
+    _customRequestHeaders = customRequestHeaders.copy;
+
+    for (auto&& user : SyncManager::shared().all_logged_in_users()) {
+        for (auto&& session : user->all_sessions()) {
+            auto config = session->config();
+            config.custom_http_headers.clear();;
+            for (NSString *key in customRequestHeaders) {
+                config.custom_http_headers.emplace(key.UTF8String, customRequestHeaders[key].UTF8String);
+            }
+            session->update_configuration(std::move(config));
+        }
+    }
+}
+
+- (void)setLogger:(RLMSyncLogFunction)logFn {
+    _logger = logFn;
+    if (_logger) {
+        _loggerFactory = std::make_unique<CallbackLoggerFactory>(logFn);
+        SyncManager::shared().set_logger_factory(*_loggerFactory);
+    }
+    else {
+        _loggerFactory = nullptr;
+        SyncManager::shared().set_logger_factory(s_syncLoggerFactory);
+    }
+}
+
+- (void)setTimeoutOptions:(RLMSyncTimeoutOptions *)timeoutOptions {
+    _timeoutOptions = timeoutOptions;
+    SyncManager::shared().set_timeouts(timeoutOptions->_options);
+}
+
 #pragma mark - Passthrough properties
 
 - (RLMSyncLogLevel)logLevel {
@@ -158,53 +222,6 @@ - (void)_fireError:(NSError *)error {
     });
 }
 
-- (void)_fireErrorWithCode:(int)errorCode
-                   message:(NSString *)message
-                   isFatal:(BOOL)fatal
-                   session:(RLMSyncSession *)session
-                  userInfo:(NSDictionary *)userInfo
-                errorClass:(RLMSyncSystemErrorKind)errorClass {
-    NSError *error = nil;
-    BOOL shouldMakeError = YES;
-    NSDictionary *custom = nil;
-    // Note that certain types of errors are 'interactive'; users have several options
-    // as to how to proceed after the error is reported.
-    switch (errorClass) {
-        case RLMSyncSystemErrorKindClientReset: {
-            std::string path = [userInfo[@(realm::SyncError::c_original_file_path_key)] UTF8String];
-            custom = @{kRLMSyncPathOfRealmBackupCopyKey:
-                           userInfo[@(realm::SyncError::c_recovery_file_path_key)],
-                       kRLMSyncErrorActionTokenKey:
-                           [[RLMSyncErrorActionToken alloc] initWithOriginalPath:std::move(path)]
-                       };;
-            break;
-        }
-        case RLMSyncSystemErrorKindPermissionDenied: {
-            std::string path = [userInfo[@(realm::SyncError::c_original_file_path_key)] UTF8String];
-            custom = @{kRLMSyncErrorActionTokenKey:
-                           [[RLMSyncErrorActionToken alloc] initWithOriginalPath:std::move(path)]
-                       };
-            break;
-        }
-        case RLMSyncSystemErrorKindUser:
-        case RLMSyncSystemErrorKindSession:
-            break;
-        case RLMSyncSystemErrorKindConnection:
-        case RLMSyncSystemErrorKindClient:
-        case RLMSyncSystemErrorKindUnknown:
-            // Report the error. There's nothing the user can do about it, though.
-            shouldMakeError = fatal;
-            break;
-    }
-    error = shouldMakeError ? make_sync_error(errorClass, message, errorCode, custom) : nil;
-    dispatch_async(dispatch_get_main_queue(), ^{
-        if (!self.errorHandler || !error) {
-            return;
-        }
-        self.errorHandler(error, session);
-    });
-}
-
 - (NSArray<RLMSyncUser *> *)_allUsers {
     NSMutableArray<RLMSyncUser *> *buffer = [NSMutableArray array];
     for (auto user : SyncManager::shared().all_logged_in_users()) {
@@ -214,6 +231,16 @@ - (void)_fireErrorWithCode:(int)errorCode
 }
 
 + (void)resetForTesting {
+    RLMSyncManager *manager = self.sharedManager;
+    manager->_errorHandler = nil;
+    manager->_appID = nil;
+    manager->_userAgent = nil;
+    manager->_logger = nil;
+    manager->_authorizationHeaderName = nil;
+    manager->_customRequestHeaders = nil;
+    manager->_pinnedCertificatePaths = nil;
+    manager->_timeoutOptions = nil;
+
     SyncManager::shared().reset_for_testing();
 }
 
@@ -226,3 +253,43 @@ - (RLMNetworkRequestOptions *)networkRequestOptions {
 }
 
 @end
+
+#pragma mark - RLMSyncTimeoutOptions
+
+@implementation RLMSyncTimeoutOptions
+- (NSUInteger)connectTimeout {
+    return _options.connect_timeout;
+}
+- (void)setConnectTimeout:(NSUInteger)connectTimeout {
+    _options.connect_timeout = connectTimeout;
+}
+
+- (NSUInteger)connectLingerTime {
+    return _options.connection_linger_time;
+}
+- (void)setConnectionLingerTime:(NSUInteger)connectionLingerTime {
+    _options.connection_linger_time = connectionLingerTime;
+}
+
+- (NSUInteger)pingKeepalivePeriod {
+    return _options.ping_keepalive_period;
+}
+- (void)setPingKeepalivePeriod:(NSUInteger)pingKeepalivePeriod {
+    _options.ping_keepalive_period = pingKeepalivePeriod;
+}
+
+- (NSUInteger)pongKeepaliveTimeout {
+    return _options.pong_keepalive_timeout;
+}
+- (void)setPongKeepaliveTimeout:(NSUInteger)pongKeepaliveTimeout {
+    _options.pong_keepalive_timeout = pongKeepaliveTimeout;
+}
+
+- (NSUInteger)fastReconnectLimit {
+    return _options.fast_reconnect_limit;
+}
+- (void)setFastReconnectLimit:(NSUInteger)fastReconnectLimit {
+    _options.fast_reconnect_limit = fastReconnectLimit;
+}
+
+@end
diff --git a/Pods/Realm/Realm/RLMSyncPermission.mm b/Pods/Realm/Realm/RLMSyncPermission.mm
index 879a107..6cbd0eb 100644
--- a/Pods/Realm/Realm/RLMSyncPermission.mm
+++ b/Pods/Realm/Realm/RLMSyncPermission.mm
@@ -16,19 +16,18 @@
 //
 ////////////////////////////////////////////////////////////////////////////
 
-#import "RLMSyncPermission_Private.hpp"
+#import "RLMSyncPermission.h"
 
 #import "RLMArray.h"
 #import "RLMObjectSchema.h"
 #import "RLMRealm_Dynamic.h"
+#import "RLMResults.h"
+#import "RLMSyncUser.h"
 #import "RLMSyncUtil_Private.hpp"
 #import "RLMUtil.hpp"
-#import "RLMResults.h"
 
 using namespace realm;
 
-using ConditionType = Permission::Condition::Type;
-
 static void verifyInWriteTransaction(__unsafe_unretained RLMRealm *const realm, SEL sel) {
     if (!realm) {
         @throw RLMException(@"Cannot call %@ on an unmanaged object.", NSStringFromSelector(sel));
@@ -219,18 +218,6 @@ + (instancetype)objectInRealm:(RLMRealm *)realm {
 
 #pragma mark - Permission
 
-@interface RLMSyncPermission () {
-@private
-    NSString *_identity;
-    NSString *_key;
-    NSString *_value;
-    util::Optional<Permission> _underlying;
-    RLMSyncAccessLevel _accessLevel;
-    NSString *_path;
-    NSDate *_updatedAt;
-}
-@end
-
 @implementation RLMSyncPermission
 
 - (instancetype)initWithRealmPath:(NSString *)path
@@ -262,27 +249,8 @@ - (instancetype)initWithRealmPath:(NSString *)path
     return self;
 }
 
-- (instancetype)initWithPermission:(Permission)permission {
-    if (self = [super init]) {
-        _underlying = util::make_optional<Permission>(std::move(permission));
-        return self;
-    }
-    return nil;
-}
-
-- (NSString *)path {
-    if (!_underlying) {
-        REALM_ASSERT(_path);
-        return _path;
-    }
-    return @(_underlying->path.c_str());
-}
-
-- (RLMSyncAccessLevel)accessLevel {
-    if (!_underlying) {
-        return _accessLevel;
-    }
-    return objCAccessLevelForAccessLevel(_underlying->access);
++ (BOOL)accessInstanceVariablesDirectly {
+    return NO;
 }
 
 - (BOOL)mayRead {
@@ -297,73 +265,47 @@ - (BOOL)mayManage {
     return self.accessLevel == RLMSyncAccessLevelAdmin;
 }
 
-- (NSString *)identity {
-    if (!_underlying) {
-        return _identity;
-    }
-    if (_underlying->condition.type == ConditionType::UserId) {
-        return @(_underlying->condition.user_id.c_str());
-    }
-    return nil;
+- (NSUInteger)hash {
+    return self.identity.hash ^ self.accessLevel ^ self.path.hash ^ self.key.hash ^ self.value.hash;
 }
 
-- (NSString *)key {
-    if (!_underlying) {
-        return _key;
+- (BOOL)isEqual:(id)object {
+    if (self == object) {
+        return YES;
     }
-    if (_underlying->condition.type == ConditionType::KeyValue) {
-        return @(_underlying->condition.key_value.first.c_str());
+    if (![object isKindOfClass:[RLMSyncPermission class]]) {
+        return NO;
     }
-    return nil;
-}
 
-- (NSString *)value {
-    if (!_underlying) {
-        return _value;
+    RLMSyncPermission *that = (RLMSyncPermission *)object;
+    if (self.accessLevel != that.accessLevel) {
+        return NO;
     }
-    if (_underlying->condition.type == ConditionType::KeyValue) {
-        return @(_underlying->condition.key_value.second.c_str());
+    if (![self.path isEqualToString:that.path]) {
+        return NO;
     }
-    return nil;
-}
-
-- (NSDate *)updatedAt {
-    if (!_underlying) {
-        return _updatedAt;
+    if (self.identity) {
+        if (!that.identity || ![self.identity isEqualToString:that.identity]) {
+            return NO;
+        }
     }
-    return RLMTimestampToNSDate(_underlying->updated_at);
-}
-
-- (realm::Permission)rawPermission {
-    if (_underlying) {
-        return *_underlying;
+    else {
+        if (that.identity || ![self.key isEqualToString:that.key] || ![self.value isEqualToString:that.value]) {
+            return NO;
+        }
     }
-    auto condition = (_identity
-                      ? Permission::Condition([_identity UTF8String])
-                      : Permission::Condition([_key UTF8String], [_value UTF8String]));
-    return Permission{
-        [_path UTF8String],
-        accessLevelForObjCAccessLevel(_accessLevel),
-        std::move(condition)
-    };
-}
-
-- (NSUInteger)hash {
-    return [self.identity hash] ^ self.accessLevel;
+    return YES;
 }
 
-- (BOOL)isEqual:(id)object {
-    if (self == object) {
-        return YES;
+- (RLMSyncPermission *)tildeExpandedSyncPermissionForUser:(RLMSyncUser *)user {
+    if (![self.path hasPrefix:@"/~/"]) {
+        return self;
     }
-    if ([object isKindOfClass:[RLMSyncPermission class]]) {
-        RLMSyncPermission *that = (RLMSyncPermission *)object;
-        return (self.accessLevel == that.accessLevel
-                && Permission::paths_are_equivalent([self.path UTF8String], [that.path UTF8String],
-                                                    [self.identity UTF8String], [that.identity UTF8String])
-                && [self.identity isEqualToString:that.identity]);
+    NSString *path = [self.path stringByReplacingCharactersInRange:{1, 1} withString:user.identity];
+    if (_identity) {
+        return [[RLMSyncPermission alloc] initWithRealmPath:path identity:_identity accessLevel:_accessLevel];
     }
-    return NO;
+    return [[RLMSyncPermission alloc] initWithRealmPath:path username:_value accessLevel:_accessLevel];
 }
 
 - (NSString *)description {
@@ -374,9 +316,60 @@ - (NSString *)description {
         typeDescription = [NSString stringWithFormat:@"key: %@, value: %@", self.key, self.value];
     }
     return [NSString stringWithFormat:@"<RLMSyncPermission> %@, path: %@, access level: %@",
-            typeDescription,
-            self.path,
-            @(Permission::description_for_access_level(accessLevelForObjCAccessLevel(self.accessLevel)).c_str())];
+            typeDescription, self.path, RLMSyncAccessLevelToString(self.accessLevel)];
+}
+
+NSString *RLMSyncAccessLevelToString(RLMSyncAccessLevel level) {
+    switch (level) {
+        case RLMSyncAccessLevelNone:  return @"none";
+        case RLMSyncAccessLevelRead:  return @"read";
+        case RLMSyncAccessLevelWrite: return @"write";
+        case RLMSyncAccessLevelAdmin: return @"admin";
+    }
+    return @"unknown";
+}
+
+RLMSyncAccessLevel RLMSyncAccessLevelFromString(NSString *level) {
+    if ([level isEqualToString:@"none"]) {
+        return RLMSyncAccessLevelNone;
+    }
+    if ([level isEqualToString:@"read"]) {
+        return RLMSyncAccessLevelRead;
+    }
+    if ([level isEqualToString:@"write"]) {
+        return RLMSyncAccessLevelWrite;
+    }
+    if ([level isEqualToString:@"admin"]) {
+        return RLMSyncAccessLevelAdmin;
+    }
+    @throw RLMException(@"Invalid access level %@", level);
 }
 
 @end
+
+@implementation RLMSyncPermissionOffer
+- (instancetype)initWithRealmPath:(NSString *)path
+                            token:(NSString *)token
+                        expiresAt:(NSDate *)expiresAt
+                        createdAt:(NSDate *)createdAt
+                      accessLevel:(RLMSyncAccessLevel)accessLevel {
+    if (self = [super init]) {
+        _realmPath = path;
+        _token = token;
+        _expiresAt = expiresAt;
+        _createdAt = createdAt;
+        _accessLevel = accessLevel;
+    }
+    return self;
+}
+
++ (BOOL)accessInstanceVariablesDirectly {
+    return NO;
+}
+
+- (NSString *)description {
+    return [NSString stringWithFormat:@"<RLMSyncPermissionOffer: %p> path: %@, access level: %@, token: %@, createdAt: %@, expiresAt: %@",
+            self, _realmPath, RLMSyncAccessLevelToString(_accessLevel),
+            _token, _createdAt, _expiresAt];
+}
+@end
diff --git a/Pods/Realm/Realm/RLMSyncPermissionResults.mm b/Pods/Realm/Realm/RLMSyncPermissionResults.mm
deleted file mode 100644
index da3bcb9..0000000
--- a/Pods/Realm/Realm/RLMSyncPermissionResults.mm
+++ /dev/null
@@ -1,258 +0,0 @@
-////////////////////////////////////////////////////////////////////////////
-//
-// Copyright 2017 Realm Inc.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-////////////////////////////////////////////////////////////////////////////
-
-#import "RLMSyncPermissionResults.h"
-
-#import "RLMCollection_Private.hpp"
-#import "RLMObjectSchema_Private.hpp"
-#import "RLMQueryUtil.hpp"
-#import "RLMResults_Private.hpp"
-#import "RLMSchema_Private.hpp"
-#import "RLMSyncPermission_Private.hpp"
-#import "RLMSyncUtil_Private.hpp"
-#import "RLMUtil.hpp"
-
-#import "object.hpp"
-
-using namespace realm;
-
-namespace {
-
-bool keypath_is_valid(NSString *keypath)
-{
-    static auto valid = [NSSet setWithArray:@[RLMSyncPermissionSortPropertyPath,
-                                              RLMSyncPermissionSortPropertyUserID,
-                                              RLMSyncPermissionSortPropertyUpdated]];
-    return [valid containsObject:keypath];
-}
-
-}
-
-/// Sort by the Realm Object Server path to the Realm to which the permission applies.
-RLMSyncPermissionSortProperty const RLMSyncPermissionSortPropertyPath       = @"path";
-/// Sort by the identity of the user to whom the permission applies.
-RLMSyncPermissionSortProperty const RLMSyncPermissionSortPropertyUserID     = @"userId";
-/// Sort by the date the permissions were last updated.
-RLMSyncPermissionSortProperty const RLMSyncPermissionSortPropertyUpdated    = @"updatedAt";
-
-@interface RLMSyncPermissionResults ()
-@property (nonatomic, strong) RLMSchema *schema;
-@property (nonatomic, strong) RLMObjectSchema *objectSchema;
-@end
-
-@implementation RLMSyncPermissionResults
-
-#pragma mark - Public API
-
-- (RLMPropertyType)type {
-    return RLMPropertyTypeObject;
-}
-
-- (NSString *)objectClassName {
-    return NSStringFromClass([RLMSyncPermission class]);
-}
-
-- (RLMRealm *)realm {
-    return nil;
-}
-
-- (RLMSyncPermission *)objectAtIndex:(NSUInteger)index {
-    return translateRLMResultsErrors([&] {
-        Object permission(_results.get_realm(), _results.get_object_schema(), _results.get(index));
-        return [[RLMSyncPermission alloc] initWithPermission:Permission(permission)];
-    });
-}
-
-- (RLMSyncPermission *)firstObject {
-    return self.count == 0 ? nil : [self objectAtIndex:0];
-}
-
-- (RLMSyncPermission *)lastObject {
-    return self.count == 0 ? nil : [self objectAtIndex:(self.count - 1)];
-}
-
-- (NSUInteger)indexOfObject:(RLMSyncPermission *)object {
-    if (object.key) {
-        // Key-value permissions are only used for setting; they are never returned.
-        return NSNotFound;
-    }
-    // Canonicalize the path.
-    NSString *path = object.path;
-    if ([path rangeOfString:@"~"].location != NSNotFound) {
-        path = [path stringByReplacingOccurrencesOfString:@"~" withString:object.identity];
-    }
-    NSString *topPrivilege;
-    switch (object.accessLevel) {
-        case RLMSyncAccessLevelNone:
-            // Deleted permissions are removed from the permissions Realm by ROS.
-            return NSNotFound;
-        case RLMSyncAccessLevelRead:
-            topPrivilege = @"mayRead";
-            break;
-        case RLMSyncAccessLevelWrite:
-            topPrivilege = @"mayWrite";
-            break;
-        case RLMSyncAccessLevelAdmin:
-            topPrivilege = @"mayManage";
-            break;
-    }
-    // Build the predicate.
-    NSPredicate *p = [NSPredicate predicateWithFormat:@"%K = %@ AND %K = %@ AND %K == YES",
-                      RLMSyncPermissionSortPropertyPath, path,
-                      RLMSyncPermissionSortPropertyUserID, object.identity,
-                      topPrivilege];
-    return [self indexOfObjectWithPredicate:p];
-}
-
-- (NSUInteger)indexOfObjectWithPredicate:(NSPredicate *)predicate {
-    return translateRLMResultsErrors([&] {
-        auto& group = _results.get_realm()->read_group();
-        auto query = RLMPredicateToQuery(predicate, self.objectSchema, self.schema, group);
-        return RLMConvertNotFound(_results.index_of(std::move(query)));
-    });
-}
-
-- (RLMResults<RLMSyncPermission *> *)objectsWithPredicate:(NSPredicate *)predicate {
-    return translateRLMResultsErrors([&] {
-        auto query = RLMPredicateToQuery(predicate, self.objectSchema, self.schema, _results.get_realm()->read_group());
-        return [[RLMSyncPermissionResults alloc] initWithResults:_results.filter(std::move(query))];
-    });
-}
-
-- (RLMResults<RLMSyncPermission *> *)sortedResultsUsingDescriptors:(NSArray<RLMSortDescriptor *> *)properties {
-    if (properties.count == 0) {
-        return self;
-    }
-    for (RLMSortDescriptor *descriptor in properties) {
-        if (!keypath_is_valid(descriptor.keyPath)) {
-            @throw RLMException(@"Invalid keypath specified. Use one of the constants defined in "
-                                @" `RLMSyncPermissionSortProperty`.");
-        }
-    }
-    return translateRLMResultsErrors([&] {
-        auto sorted = _results.sort(RLMSortDescriptorsToKeypathArray(properties));
-        return [[RLMSyncPermissionResults alloc] initWithResults:std::move(sorted)];
-    });
-}
-
-#pragma clang diagnostic push
-#pragma clang diagnostic ignored "-Wmismatched-parameter-types"
-- (RLMNotificationToken *)addNotificationBlock:(void(^)(RLMSyncPermissionResults *results,
-                                                        RLMCollectionChange *change,
-                                                        NSError *error))block {
-    auto cb = [=](const realm::CollectionChangeSet& changes, std::exception_ptr ptr) {
-        if (ptr) {
-            NSError *error = translateSyncExceptionPtrToError(std::move(ptr), RLMPermissionActionTypeGet);
-            REALM_ASSERT(error);
-            block(nil, nil, error);
-        } else {
-            // Finished successfully
-            block(self, [[RLMCollectionChange alloc] initWithChanges:changes], nil);
-        }
-    };
-    return [[RLMCancellationToken alloc] initWithToken:_results.add_notification_callback(std::move(cb)) realm:nil];
-}
-#pragma clang diagnostic pop
-
-- (id)aggregate:(__unused NSString *)property
-         method:(__unused util::Optional<Mixed> (Results::*)(size_t))method
-     methodName:(__unused NSString *)methodName returnNilForEmpty:(__unused BOOL)returnNilForEmpty {
-    // We don't support any of the min/max/average/sum APIs; they don't make sense for this collection type.
-    return nil;
-}
-
-- (id)valueForKey:(NSString *)key {
-    size_t count = self.count;
-    if (count == 0) {
-        return @[];
-    }
-    NSMutableArray *results = [NSMutableArray arrayWithCapacity:count];
-    if ([key isEqualToString:@"self"]) {
-        for (size_t i = 0; i < count; i++) {
-            [results addObject:[self objectAtIndex:i]];
-        }
-    } else {
-        for (size_t i = 0; i < count; i++) {
-            [results addObject:[[self objectAtIndex:i] valueForKey:key] ?: NSNull.null];
-        }
-    }
-    return results;
-}
-
-- (void)setValue:(__unused id)value forKey:(__unused NSString *)key {
-    @throw RLMException(@"Cannot set values for the read-only type `RLMSyncPermission`.");
-}
-
-#pragma mark - System
-
-- (RLMSchema *)schema {
-    if (!_schema) {
-        _schema = [RLMSchema dynamicSchemaFromObjectStoreSchema:_results.get_realm()->schema()];
-    }
-    return _schema;
-}
-
-- (RLMObjectSchema *)objectSchema {
-    if (!_objectSchema) {
-        _objectSchema = [RLMObjectSchema objectSchemaForObjectStoreSchema:_results.get_object_schema()];
-    }
-    return _objectSchema;
-}
-
-- (NSString *)description {
-    return RLMDescriptionWithMaxDepth(@"RLMSyncPermissionResults", self, 1);
-}
-
-- (NSUInteger)countByEnumeratingWithState:(NSFastEnumerationState *)state
-                                  objects:(id __unsafe_unretained [])buffer
-                                    count:(NSUInteger)len {
-    // FIXME: It would be nice to have a shared fast enumeration implementation for `realm::Results`-only RLMResults.
-    NSUInteger thisSize = self.count;
-    if (state->state == 0) {
-        state->extra[0] = 0;
-        state->extra[1] = (long)thisSize;
-        state->state = 1;
-    }
-    NSUInteger objectsInBuffer = 0;
-    long idx = state->extra[0];
-    if ((unsigned long)idx == thisSize) {
-        // finished
-        return 0;
-    }
-    state->itemsPtr = buffer;
-    state->mutationsPtr = state->extra + 1;
-    while (true) {
-        if (objectsInBuffer == len) {
-            // Buffer is full.
-            state->extra[0] = idx;
-            return objectsInBuffer;
-        }
-        if ((unsigned long)idx == thisSize) {
-            // finished
-            state->extra[0] = idx;
-            return objectsInBuffer;
-        }
-        // Otherwise, add an object and advance the index pointer.
-        RLMSyncPermission * __autoreleasing thisPermission = [self objectAtIndex:idx];
-        buffer[objectsInBuffer] = thisPermission;
-        idx++;
-        objectsInBuffer++;
-    }
-}
-
-@end
diff --git a/Pods/Realm/Realm/RLMSyncSession.mm b/Pods/Realm/Realm/RLMSyncSession.mm
index cb38484..cddaade 100644
--- a/Pods/Realm/Realm/RLMSyncSession.mm
+++ b/Pods/Realm/Realm/RLMSyncSession.mm
@@ -22,6 +22,8 @@
 #import "RLMSyncConfiguration_Private.hpp"
 #import "RLMSyncUser_Private.hpp"
 #import "RLMSyncUtil_Private.hpp"
+
+#import "sync/async_open_task.hpp"
 #import "sync/sync_session.hpp"
 
 using namespace realm;
@@ -109,7 +111,9 @@ - (instancetype)initWithSyncSession:(std::shared_ptr<SyncSession> const&)session
         // No need to save the token as RLMSyncSession always outlives the
         // underlying SyncSession
         session->register_connection_change_callback([=](auto, auto newState) {
-            self.connectionState = convertConnectionState(newState);
+            dispatch_async(dispatch_get_main_queue(), ^{
+                self.connectionState = convertConnectionState(newState);
+            });
         });
         return self;
     }
@@ -243,3 +247,60 @@ - (instancetype)initWithOriginalPath:(std::string)originalPath {
 }
 
 @end
+
+@implementation RLMAsyncOpenTask {
+    bool _cancel;
+    NSMutableArray<RLMProgressNotificationBlock> *_blocks;
+}
+
+- (void)addProgressNotificationOnQueue:(dispatch_queue_t)queue block:(RLMProgressNotificationBlock)block {
+    auto wrappedBlock = ^(NSUInteger transferred_bytes, NSUInteger transferrable_bytes) {
+        dispatch_async(queue, ^{
+            @autoreleasepool {
+                block(transferred_bytes, transferrable_bytes);
+            }
+        });
+    };
+
+    @synchronized (self) {
+        if (_task) {
+            _task->register_download_progress_notifier(wrappedBlock);
+        }
+        else if (!_cancel) {
+            if (!_blocks) {
+                _blocks = [NSMutableArray new];
+            }
+            [_blocks addObject:wrappedBlock];
+        }
+    }
+}
+
+- (void)addProgressNotificationBlock:(RLMProgressNotificationBlock)block {
+    [self addProgressNotificationOnQueue:dispatch_get_main_queue() block:block];
+}
+
+- (void)cancel {
+    @synchronized (self) {
+        if (_task) {
+            _task->cancel();
+        }
+        else {
+            _cancel = true;
+            _blocks = nil;
+        }
+    }
+}
+
+- (void)setTask:(std::shared_ptr<realm::AsyncOpenTask>)task {
+    @synchronized (self) {
+        _task = task;
+        if (_cancel) {
+            _task->cancel();
+        }
+        for (RLMProgressNotificationBlock block in _blocks) {
+            _task->register_download_progress_notifier(block);
+        }
+        _blocks = nil;
+    }
+}
+@end
diff --git a/Pods/Realm/Realm/RLMSyncSessionRefreshHandle.mm b/Pods/Realm/Realm/RLMSyncSessionRefreshHandle.mm
index 14ca9b3..b2de98d 100644
--- a/Pods/Realm/Realm/RLMSyncSessionRefreshHandle.mm
+++ b/Pods/Realm/Realm/RLMSyncSessionRefreshHandle.mm
@@ -58,7 +58,7 @@ @interface RLMSyncSessionRefreshHandle () {
     std::shared_ptr<SyncSession> _strongSession;
 }
 
-@property (nonatomic) NSTimer *timer;
+@property (nonatomic) dispatch_source_t timer;
 
 @property (nonatomic) NSURL *realmURL;
 @property (nonatomic) NSURL *authServerURL;
@@ -86,19 +86,26 @@ - (instancetype)initWithRealmURL:(NSURL *)realmURL
         _session = _strongSession;
         _user = user;
         // Immediately fire off the network request.
-        [self _timerFired:nil];
+        [self _timerFired];
         return self;
     }
     return nil;
 }
 
 - (void)dealloc {
-    [self.timer invalidate];
+    [self cancelTimer];
 }
 
 - (void)invalidate {
     _strongSession = nullptr;
-    [self.timer invalidate];
+    [self cancelTimer];
+}
+
+- (void)cancelTimer {
+    if (self.timer) {
+        dispatch_source_cancel(self.timer);
+        self.timer = nil;
+    }
 }
 
 + (NSDate *)fireDateForTokenExpirationDate:(NSDate *)date nowDate:(NSDate *)nowDate {
@@ -108,37 +115,30 @@ + (NSDate *)fireDateForTokenExpirationDate:(NSDate *)date nowDate:(NSDate *)nowD
 }
 
 - (void)scheduleRefreshTimer:(NSDate *)dateWhenTokenExpires {
-    // Schedule the timer on the main queue.
-    // It's very likely that this method will be run on a side thread, for example
-    // on the thread that runs `NSURLSession`'s completion blocks. We can't be
-    // guaranteed that there's an existing runloop on those threads, and we don't want
-    // to create and start a new one if one doesn't already exist.
-    dispatch_async(dispatch_get_main_queue(), ^{
-        [self.timer invalidate];
-        NSDate *fireDate = [RLMSyncSessionRefreshHandle fireDateForTokenExpirationDate:dateWhenTokenExpires
-                                                                               nowDate:[NSDate date]];
-        if (!fireDate) {
-            unregisterRefreshHandle(_user, _path);
-            return;
-        }
-        self.timer = [[NSTimer alloc] initWithFireDate:fireDate
-                                              interval:0
-                                                target:self
-                                              selector:@selector(_timerFired:)
-                                              userInfo:nil
-                                               repeats:NO];
-        [[NSRunLoop currentRunLoop] addTimer:self.timer forMode:NSDefaultRunLoopMode];
-    });
+    [self cancelTimer];
+
+    NSDate *fireDate = [RLMSyncSessionRefreshHandle fireDateForTokenExpirationDate:dateWhenTokenExpires
+                                                                           nowDate:[NSDate date]];
+    if (!fireDate) {
+        unregisterRefreshHandle(_user, _path);
+        return;
+    }
+
+    NSTimeInterval timeToExpiration = [fireDate timeIntervalSinceNow];
+    self.timer = dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER, 0, 0, dispatch_get_main_queue());
+    dispatch_source_set_timer(self.timer, dispatch_time(DISPATCH_TIME_NOW, timeToExpiration * NSEC_PER_SEC),
+                              /* interval */ DISPATCH_TIME_FOREVER,
+                              /* leeway */ NSEC_PER_SEC * (timeToExpiration / 10));
+    dispatch_source_set_event_handler(self.timer, ^{ [self _timerFired]; });
+    dispatch_resume(self.timer);
 }
 
 /// Handler for network requests whose responses successfully parse into an auth response model.
-- (BOOL)_handleSuccessfulRequest:(RLMAuthResponseModel *)model {
-    std::shared_ptr<SyncSession> session = _session.lock();
-    if (!session) {
-        // The session is dead or in a fatal error state.
-        unregisterRefreshHandle(_user, _path);
-        [self invalidate];
-        return NO;
+- (BOOL)_handleSuccessfulRequest:(RLMAuthResponseModel *)model session:(SyncSession&)session {
+    // Realm Cloud will give us a url prefix in the auth response that we need
+    // to pass onto objectstore to have it connect to the proper sync worker
+    if (model.urlPrefix) {
+        session.set_url_prefix(model.urlPrefix.UTF8String);
     }
 
     // Calculate the resolved path.
@@ -153,7 +153,7 @@ - (BOOL)_handleSuccessfulRequest:(RLMAuthResponseModel *)model {
         @throw RLMException(@"Resolved path returned from the server was invalid (%@).", resolvedPath);
     }
     // Pass the token and resolved path to the underlying sync subsystem.
-    session->refresh_access_token([model.accessToken.token UTF8String], {resolvedURLString.UTF8String});
+    session.refresh_access_token([model.accessToken.token UTF8String], {resolvedURLString.UTF8String});
 
     // Schedule a refresh. If we're successful we must already have `bind()`ed the session
     // initially, so we can null out the strong pointer.
@@ -219,16 +219,23 @@ - (void)_handleFailedRequest:(NSError *)error {
 
 /// Callback handler for network requests.
 - (BOOL)_onRefreshCompletionWithError:(NSError *)error json:(NSDictionary *)json {
+    std::shared_ptr<SyncSession> session = _session.lock();
+    if (!session) {
+        // The session is dead or in a fatal error state.
+        unregisterRefreshHandle(_user, _path);
+        [self invalidate];
+        return NO;
+    }
+
     if (json && !error) {
         RLMAuthResponseModel *model = [[RLMAuthResponseModel alloc] initWithDictionary:json
                                                                     requireAccessToken:YES
                                                                    requireRefreshToken:NO];
         if (model) {
-            return [self _handleSuccessfulRequest:model];
+            return [self _handleSuccessfulRequest:model session:*session];
         }
         // Otherwise, malformed JSON
         unregisterRefreshHandle(_user, _path);
-        [self.timer invalidate];
         NSError *error = make_sync_error(make_auth_error_bad_response(json));
         if (self.completionBlock) {
             self.completionBlock(error);
@@ -241,14 +248,13 @@ - (BOOL)_onRefreshCompletionWithError:(NSError *)error json:(NSDictionary *)json
     return NO;
 }
 
-- (void)_timerFired:(__unused NSTimer *)timer {
+- (void)_timerFired {
     RLMServerToken refreshToken = nil;
     if (auto user = _user.lock()) {
         refreshToken = @(user->refresh_token().c_str());
     }
     if (!refreshToken) {
         unregisterRefreshHandle(_user, _path);
-        [self.timer invalidate];
         return;
     }
 
@@ -263,12 +269,10 @@ - (void)_timerFired:(__unused NSTimer *)timer {
     RLMSyncCompletionBlock handler = ^(NSError *error, NSDictionary *json) {
         [weakSelf _onRefreshCompletionWithError:error json:json];
     };
-    [RLMNetworkClient sendRequestToEndpoint:[RLMSyncAuthEndpoint endpoint]
-                                     server:self.authServerURL
-                                       JSON:json
-                                    timeout:60
-                                    options:[[RLMSyncManager sharedManager] networkRequestOptions]
-                                 completion:handler];
+    [RLMSyncAuthEndpoint sendRequestToServer:self.authServerURL
+                                        JSON:json
+                                     timeout:60.0
+                                  completion:handler];
 }
 
 @end
diff --git a/Pods/Realm/Realm/RLMSyncSubscription.mm b/Pods/Realm/Realm/RLMSyncSubscription.mm
index e33a478..b17c033 100644
--- a/Pods/Realm/Realm/RLMSyncSubscription.mm
+++ b/Pods/Realm/Realm/RLMSyncSubscription.mm
@@ -30,25 +30,94 @@
 
 using namespace realm;
 
+@implementation RLMSyncSubscriptionOptions
+@end
+
 @interface RLMSyncSubscription ()
 @property (nonatomic, readwrite) RLMSyncSubscriptionState state;
 @property (nonatomic, readwrite, nullable) NSError *error;
+@property (nonatomic, readwrite) NSString *query;
+@property (nonatomic, readwrite, nullable) NSDate *createdAt;
+@property (nonatomic, readwrite, nullable) NSDate *updatedAt;
+@property (nonatomic, readwrite, nullable) NSDate *expiresAt;
+@property (nonatomic, readwrite) NSTimeInterval timeToLive;
 @end
 
 @implementation RLMSyncSubscription {
     partial_sync::SubscriptionNotificationToken _token;
     util::Optional<partial_sync::Subscription> _subscription;
+    Object _obj;
     RLMRealm *_realm;
 }
 
-- (instancetype)initWithName:(NSString *)name results:(Results const&)results realm:(RLMRealm *)realm {
+static std::vector<LinkPathPart> parseKeypath(StringData keypath, Group const& group,
+                                              Schema const& schema, const ObjectSchema *objectSchema) {
+    auto check = [&](bool condition, const char* fmt, auto... args) {
+        if (!condition) {
+            throw std::invalid_argument(util::format("Invalid LinkingObjects inclusion from key path '%1': %2.",
+                                                     keypath, util::format(fmt, args...)));
+        }
+    };
+
+    const char* begin = keypath.data();
+    const char* end = keypath.data() + keypath.size();
+    check(begin != end, "missing property name");
+
+    std::vector<LinkPathPart> ret;
+    while (begin != end) {
+        auto sep = std::find(begin, end, '.');
+        check(sep != begin && sep + 1 != end, "missing property name");
+        StringData key(begin, sep - begin);
+        begin = sep + (sep != end);
+
+        auto prop = objectSchema->property_for_name(key);
+        check(prop, "property '%1.%2' does not exist", objectSchema->name, key);
+        check(prop->type == PropertyType::Object || prop->type == PropertyType::LinkingObjects,
+              "property '%1.%2' is of unsupported type '%3'",
+              objectSchema->name, key, string_for_property_type(prop->type));
+
+        objectSchema = &*schema.find(prop->object_type);
+
+        if (prop->type == PropertyType::Object) {
+            check(begin != end, "key path must end in a LinkingObjects property and '%1.%2' is of type '%3'",
+                  objectSchema->name, key, string_for_property_type(prop->type));
+            ret.emplace_back(prop->table_column);
+        }
+        else {
+            ret.emplace_back(objectSchema->property_for_name(prop->link_origin_property_name)->table_column,
+                             ObjectStore::table_for_object_type(group, objectSchema->name));
+        }
+    }
+    return ret;
+}
+
+- (instancetype)initWithOptions:(RLMSyncSubscriptionOptions *)options results:(Results const&)results realm:(RLMRealm *)realm {
     if (!(self = [super init]))
         return nil;
 
-    _name = [name copy];
+    _name = [options.name copy];
+    _timeToLive = NAN;
     _realm = realm;
+    _createdAt = _updatedAt = NSDate.date;
     try {
-        _subscription = partial_sync::subscribe(results, name ? util::make_optional<std::string>(name.UTF8String) : util::none);
+        partial_sync::SubscriptionOptions opt;
+        if (options.name) {
+            opt.user_provided_name = std::string(RLMStringDataWithNSString(options.name));
+        }
+        if (options.timeToLive > 0) {
+            opt.time_to_live_ms = options.timeToLive * 1000;
+        }
+        opt.update = options.overwriteExisting;
+        if (options.includeLinkingObjectProperties) {
+            std::vector<std::vector<LinkPathPart>> keypaths;
+            for (NSString *keyPath in options.includeLinkingObjectProperties) {
+                keypaths.push_back(parseKeypath(keyPath.UTF8String, realm.group,
+                                                realm->_realm->schema(),
+                                                &results.get_object_schema()));
+            }
+            opt.inclusions = IncludeDescriptor{*ObjectStore::table_for_object_type(realm.group, results.get_object_type()), keypaths};
+        }
+        _subscription = partial_sync::subscribe(options.limit ? results.limit(options.limit) : results, std::move(opt));
     }
     catch (std::exception const& e) {
         @throw RLMException(e);
@@ -56,9 +125,12 @@ - (instancetype)initWithName:(NSString *)name results:(Results const&)results re
     self.state = (RLMSyncSubscriptionState)_subscription->state();
     __weak auto weakSelf = self;
     _token = _subscription->add_notification_callback([weakSelf] {
-        auto self = weakSelf;
-        if (!self)
-            return;
+        RLMSyncSubscription *self;
+        @autoreleasepool {
+            self = weakSelf;
+            if (!self)
+                return;
+        }
 
         // Retrieve the current error and status. Update our properties only if the values have changed,
         // since clients use KVO to observe these properties.
@@ -91,6 +163,22 @@ - (instancetype)initWithName:(NSString *)name results:(Results const&)results re
                 self.state = status;
             }
         }
+
+        if (status != RLMSyncSubscriptionStateComplete) {
+            return;
+        }
+
+        auto obj = self->_subscription->result_set_object();
+        if (obj && obj->is_valid()) {
+            _obj = std::move(*obj);
+            _token = {};
+            _token.result_sets_token = _obj.add_notification_callback([weakSelf](CollectionChangeSet const&, std::exception_ptr) {
+                @autoreleasepool {
+                    [weakSelf updateFromRow];
+                }
+            });
+            [self updateFromRow];
+        }
     });
 
     return self;
@@ -99,6 +187,36 @@ - (instancetype)initWithName:(NSString *)name results:(Results const&)results re
 - (void)unsubscribe {
     partial_sync::unsubscribe(*_subscription);
 }
+
+- (void)updateFromRow {
+    // We only want to call the setter if the value actually changed because of KVO
+#define REALM_SET_IF_CHANGED(prop, value) do { \
+    auto newValue = value; \
+    if (prop != newValue) { \
+        prop = newValue; \
+    } \
+} while (0)
+
+    if (!_obj.is_valid()) {
+        REALM_SET_IF_CHANGED(self.state, RLMSyncSubscriptionStateInvalidated);
+        return;
+    }
+
+    auto row = _obj.row();
+    REALM_SET_IF_CHANGED(self.query, RLMStringDataToNSString(row.get_string(row.get_column_index("query"))));
+    REALM_SET_IF_CHANGED(self.createdAt, RLMTimestampToNSDate(row.get_timestamp(row.get_column_index("created_at"))));
+    REALM_SET_IF_CHANGED(self.updatedAt, RLMTimestampToNSDate(row.get_timestamp(row.get_column_index("updated_at"))));
+    REALM_SET_IF_CHANGED(self.expiresAt, RLMTimestampToNSDate(row.get_timestamp(row.get_column_index("expires_at"))));
+#undef REALM_SET_IF_CHANGED
+
+    auto ttl = row.get<util::Optional<int64_t>>(row.get_column_index("time_to_live"));
+    if (ttl && _timeToLive != *ttl / 1000.0) {
+        self.timeToLive = *ttl / 1000.0;
+    }
+    else if (!ttl && !isnan(_timeToLive)) {
+        self.timeToLive = NAN;
+    }
+}
 @end
 
 @interface RLMSyncSubscriptionObject : RLMObjectBase
@@ -108,10 +226,22 @@ @implementation RLMSyncSubscriptionObject {
     Object _obj;
 }
 
++ (NSString *)primaryKey {
+    return nil;
+}
+
++ (NSDictionary *)defaultPropertyValues {
+    return nil;
+}
+
 - (NSString *)name {
     return _row.is_attached() ? RLMStringDataToNSString(_row.get_string(_row.get_column_index("name"))) : nil;
 }
 
+- (NSString *)query {
+    return _row.is_attached() ? RLMStringDataToNSString(_row.get_string(_row.get_column_index("query"))) : nil;
+}
+
 - (RLMSyncSubscriptionState)state {
     if (!_row.is_attached()) {
         return RLMSyncSubscriptionStateInvalidated;
@@ -132,6 +262,29 @@ - (NSError *)error {
                            userInfo:@{NSLocalizedDescriptionKey: RLMStringDataToNSString(err)}];
 }
 
+- (NSDate *)createdAt {
+    return _row.is_attached() ? RLMTimestampToNSDate(_row.get_timestamp(_row.get_column_index("created_at"))) : nil;
+}
+
+- (NSDate *)updatedAt {
+    return _row.is_attached() ? RLMTimestampToNSDate(_row.get_timestamp(_row.get_column_index("updated_at"))) : nil;
+}
+
+- (NSDate *)expiresAt {
+    return _row.is_attached() ? RLMTimestampToNSDate(_row.get_timestamp(_row.get_column_index("expires_at"))) : nil;
+}
+
+- (NSTimeInterval)timeToLive {
+    if (!_row.is_attached()) {
+        return NAN;
+    }
+    auto columnIndex = _row.get_column_index("time_to_live");
+    if (_row.is_null(columnIndex)) {
+        return NAN;
+    }
+    return _row.get_int(columnIndex) / 1000.0;
+}
+
 - (NSString *)descriptionWithMaxDepth:(NSUInteger)depth {
     if (depth == 0) {
         return @"<Maximum depth exceeded>";
@@ -139,10 +292,10 @@ - (NSString *)descriptionWithMaxDepth:(NSUInteger)depth {
 
     auto objectType = _row.get_string(_row.get_column_index("matches_property"));
     objectType = objectType.substr(0, objectType.size() - strlen("_matches"));
-    return [NSString stringWithFormat:@"RLMSyncSubscription {\n\tname = %@\n\tobjectType = %@\n\tquery = %@\n\tstatus = %@\n\terror = %@\n}",
+    return [NSString stringWithFormat:@"RLMSyncSubscription {\n\tname = %@\n\tobjectType = %@\n\tquery = %@\n\tstatus = %@\n\terror = %@\n\tcreatedAt = %@\n\tupdatedAt = %@\n\texpiresAt = %@\n\ttimeToLive = %@\n}",
             self.name, RLMStringDataToNSString(objectType),
             RLMStringDataToNSString(_row.get_string(_row.get_column_index("query"))),
-            @(self.state), self.error];
+            @(self.state), self.error, self.createdAt, self.updatedAt, self.expiresAt, @(self.timeToLive)];
 }
 
 - (void)unsubscribe {
@@ -183,12 +336,22 @@ void error(std::exception_ptr) {}
 }
 @end
 
+static ObjectSchema& addPublicNames(ObjectSchema& os) {
+    using namespace partial_sync;
+    os.property_for_name(property_created_at)->public_name    = "createdAt";
+    os.property_for_name(property_updated_at)->public_name    = "updatedAt";
+    os.property_for_name(property_expires_at)->public_name    = "expiresAt";
+    os.property_for_name(property_time_to_live)->public_name  = "timeToLive";
+    os.property_for_name(property_error_message)->public_name = "error";
+    return os;
+}
+
 // RLMClassInfo stores pointers into the schema rather than owning the objects
 // it points to, so for a ClassInfo that's not part of the schema we need a
 // wrapper object that owns them
 RLMResultsSetInfo::RLMResultsSetInfo(__unsafe_unretained RLMRealm *const realm)
-: osObjectSchema(ObjectSchema(realm->_realm->read_group(), partial_sync::result_sets_type_name))
-, rlmObjectSchema([RLMObjectSchema objectSchemaForObjectStoreSchema:osObjectSchema])
+: osObjectSchema(realm->_realm->read_group(), partial_sync::result_sets_type_name)
+, rlmObjectSchema([RLMObjectSchema objectSchemaForObjectStoreSchema:addPublicNames(osObjectSchema)])
 , info(realm, rlmObjectSchema, &osObjectSchema)
 {
     rlmObjectSchema.accessorClass = [RLMSyncSubscriptionObject class];
@@ -231,15 +394,24 @@ - (RLMResults *)distinctResultsUsingKeyPaths:(__unused NSArray<NSString *> *)key
 
 @implementation RLMResults (SyncSubscription)
 - (RLMSyncSubscription *)subscribe {
-    return [[RLMSyncSubscription alloc] initWithName:nil results:_results realm:self.realm];
+    return [[RLMSyncSubscription alloc] initWithOptions:nil results:_results realm:self.realm];
 }
 
 - (RLMSyncSubscription *)subscribeWithName:(NSString *)subscriptionName {
-    return [[RLMSyncSubscription alloc] initWithName:subscriptionName results:_results realm:self.realm];
+    auto options = [[RLMSyncSubscriptionOptions alloc] init];
+    options.name = subscriptionName;
+    return [[RLMSyncSubscription alloc] initWithOptions:options results:_results realm:self.realm];
 }
 
 - (RLMSyncSubscription *)subscribeWithName:(NSString *)subscriptionName limit:(NSUInteger)limit {
-    return [[RLMSyncSubscription alloc] initWithName:subscriptionName results:_results.limit(limit) realm:self.realm];
+    auto options = [[RLMSyncSubscriptionOptions alloc] init];
+    options.name = subscriptionName;
+    options.limit = limit;
+    return [[RLMSyncSubscription alloc] initWithOptions:options results:_results realm:self.realm];
+}
+
+- (RLMSyncSubscription *)subscribeWithOptions:(RLMSyncSubscriptionOptions *)options {
+    return [[RLMSyncSubscription alloc] initWithOptions:options results:_results realm:self.realm];
 }
 @end
 
@@ -260,7 +432,7 @@ - (nullable RLMSyncSubscription *)subscriptionWithName:(NSString *)name {
     if (row == npos) {
         return nil;
     }
-    RLMObjectBase *acc = RLMCreateManagedAccessor(info.rlmObjectSchema.accessorClass, self, &info);
+    RLMObjectBase *acc = RLMCreateManagedAccessor(info.rlmObjectSchema.accessorClass, &info);
     acc->_row = info.table()->get(row);
     return (RLMSyncSubscription *)acc;
 }
diff --git a/Pods/Realm/Realm/RLMSyncUser.mm b/Pods/Realm/Realm/RLMSyncUser.mm
index 63d14ac..1c60cd2 100644
--- a/Pods/Realm/Realm/RLMSyncUser.mm
+++ b/Pods/Realm/Realm/RLMSyncUser.mm
@@ -27,8 +27,7 @@
 #import "RLMSyncConfiguration.h"
 #import "RLMSyncConfiguration_Private.hpp"
 #import "RLMSyncManager_Private.h"
-#import "RLMSyncPermissionResults.h"
-#import "RLMSyncPermission_Private.hpp"
+#import "RLMSyncPermission.h"
 #import "RLMSyncSessionRefreshHandle.hpp"
 #import "RLMSyncSession_Private.hpp"
 #import "RLMSyncUtil_Private.hpp"
@@ -39,39 +38,14 @@
 #import "sync/sync_user.hpp"
 
 using namespace realm;
-using ConfigMaker = std::function<Realm::Config(std::shared_ptr<SyncUser>, std::string)>;
-
-namespace {
-
-std::function<void(Results, std::exception_ptr)> RLMWrapPermissionResultsCallback(RLMPermissionResultsBlock callback) {
-    return [callback](Results results, std::exception_ptr ptr) {
-        if (ptr) {
-            NSError *error = translateSyncExceptionPtrToError(std::move(ptr), RLMPermissionActionTypeGet);
-            REALM_ASSERT(error);
-            callback(nil, error);
-        } else {
-            // Finished successfully
-            callback([[RLMSyncPermissionResults alloc] initWithResults:std::move(results)], nil);
-        }
-    };
-}
-
-NSString *tildeSubstitutedPathForRealmURL(NSURL *url, NSString *identity) {
-    return [[url path] stringByReplacingOccurrencesOfString:@"~" withString:identity];
-}
-
-}
 
 void CocoaSyncUserContext::register_refresh_handle(const std::string& path, RLMSyncSessionRefreshHandle *handle)
 {
     REALM_ASSERT(handle);
     std::lock_guard<std::mutex> lock(m_mutex);
-    auto it = m_refresh_handles.find(path);
-    if (it != m_refresh_handles.end()) {
-        [it->second invalidate];
-        m_refresh_handles.erase(it);
-    }
-    m_refresh_handles.insert({path, handle});
+    auto& refresh_handle = m_refresh_handles[path];
+    [refresh_handle invalidate];
+    refresh_handle = handle;
 }
 
 void CocoaSyncUserContext::unregister_refresh_handle(const std::string& path)
@@ -101,19 +75,6 @@
     m_error_handler = block;
 }
 
-PermissionChangeCallback RLMWrapPermissionStatusCallback(RLMPermissionStatusBlock callback) {
-    return [callback](std::exception_ptr ptr) {
-        if (ptr) {
-            NSError *error = translateSyncExceptionPtrToError(std::move(ptr), RLMPermissionActionTypeChange);
-            REALM_ASSERT(error);
-            callback(error);
-        } else {
-            // Finished successfully
-            callback(nil);
-        }
-    };
-}
-
 @interface RLMSyncUserInfo ()
 
 @property (nonatomic, readwrite) NSArray *accounts;
@@ -127,12 +88,7 @@ + (instancetype)syncUserInfoWithModel:(RLMUserResponseModel *)model;
 
 @interface RLMSyncUser () {
     std::shared_ptr<SyncUser> _user;
-    // FIXME: remove this when the object store ConfigMaker goes away
-    std::unique_ptr<ConfigMaker> _configMaker;
 }
-
-- (instancetype)initPrivate NS_DESIGNATED_INITIALIZER;
-
 @end
 
 @implementation RLMSyncUser
@@ -147,7 +103,7 @@ + (NSDictionary *)allUsers {
 
 + (RLMSyncUser *)currentUser {
     NSArray *allUsers = [[RLMSyncManager sharedManager] _allUsers];
-    if (allUsers.count > 1) {
+    if (allUsers.count > 1 && [NSSet setWithArray:[allUsers valueForKey:@"identity"]].count > 1) {
         @throw RLMException(@"+currentUser cannot be called if more that one valid, logged-in user exists.");
     }
     return allUsers.firstObject;
@@ -155,20 +111,8 @@ + (RLMSyncUser *)currentUser {
 
 #pragma mark - API
 
-- (instancetype)initPrivate {
-    if (self = [super init]) {
-        _configMaker = std::make_unique<ConfigMaker>([](std::shared_ptr<SyncUser> user, std::string url) {
-            NSURL *objCUrl = [NSURL URLWithString:@(url.c_str())];
-            RLMSyncUser *objCUser = [[RLMSyncUser alloc] initWithSyncUser:std::move(user)];
-            return [objCUser configurationWithURL:objCUrl fullSynchronization:true].config;
-        });
-        return self;
-    }
-    return nil;
-}
-
 - (instancetype)initWithSyncUser:(std::shared_ptr<SyncUser>)user {
-    if (self = [self initPrivate]) {
+    if (self = [super init]) {
         _user = user;
         return self;
     }
@@ -187,23 +131,75 @@ + (void)logInWithCredentials:(RLMSyncCredentials *)credential
                 onCompletion:(RLMUserCompletionBlock)completion {
     [self logInWithCredentials:credential
                  authServerURL:authServerURL
-                       timeout:30
+                       timeout:0 // use timeout from RLMSyncManager
                  callbackQueue:dispatch_get_main_queue()
                   onCompletion:completion];
 }
 
-+ (void)logInWithCredentials:(RLMSyncCredentials *)credential
++ (void)logInWithCredentials:(RLMSyncCredentials *)credentials
                authServerURL:(NSURL *)authServerURL
                      timeout:(NSTimeInterval)timeout
                callbackQueue:(dispatch_queue_t)callbackQueue
                 onCompletion:(RLMUserCompletionBlock)completion {
-    RLMSyncUser *user = [[RLMSyncUser alloc] initPrivate];
-    [RLMSyncUser _performLogInForUser:user
-                          credentials:credential
-                        authServerURL:authServerURL
-                              timeout:timeout
-                        callbackQueue:callbackQueue
-                      completionBlock:completion];
+    // Special credential login should be treated differently.
+    if (credentials.provider == RLMIdentityProviderAccessToken) {
+        [self _performLoginForDirectAccessTokenCredentials:credentials
+                                             authServerURL:authServerURL
+                                           completionBlock:completion];
+        return;
+    }
+    if (credentials.provider == RLMIdentityProviderCustomRefreshToken) {
+        [self _performLoginForCustomRefreshTokenCredentials:credentials
+                                              authServerURL:authServerURL
+                                            completionBlock:completion];
+        return;
+    }
+    if (!authServerURL) {
+        @throw RLMException(@"A user cannot be logged in without specifying an authentication server URL.");
+    }
+
+    // Prepare login network request
+    NSMutableDictionary *json = [@{
+        kRLMSyncProviderKey: credentials.provider,
+        kRLMSyncDataKey: credentials.token,
+        kRLMSyncAppIDKey: RLMSyncManager.sharedManager.appID,
+    } mutableCopy];
+    if (credentials.userInfo.count) {
+        // Munge user info into the JSON request.
+        json[@"user_info"] = credentials.userInfo;
+    }
+
+    RLMSyncCompletionBlock handler = ^(NSError *error, NSDictionary *json) {
+        if (error) {
+            return completion(nil, error);
+        }
+
+        RLMAuthResponseModel *model = [[RLMAuthResponseModel alloc] initWithDictionary:json
+                                                                    requireAccessToken:NO
+                                                                   requireRefreshToken:YES];
+        if (!model) {
+            // Malformed JSON
+            return completion(nil, make_auth_error_bad_response(json));
+        }
+
+        SyncUserIdentifier identity{model.refreshToken.tokenData.identity.UTF8String,
+            authServerURL.absoluteString.UTF8String};
+        auto sync_user = SyncManager::shared().get_user(identity , [model.refreshToken.token UTF8String]);
+        if (!sync_user) {
+            return completion(nil, make_auth_error_client_issue());
+        }
+        sync_user->set_is_admin(model.refreshToken.tokenData.isAdmin);
+        return completion([[RLMSyncUser alloc] initWithSyncUser:std::move(sync_user)], nil);
+    };
+
+    [RLMSyncAuthEndpoint sendRequestToServer:authServerURL
+                                        JSON:json
+                                     timeout:timeout
+                                  completion:^(NSError *error, NSDictionary *dictionary) {
+        dispatch_async(callbackQueue, ^{
+            handler(error, dictionary);
+        });
+    }];
 }
 
 - (RLMRealmConfiguration *)configuration {
@@ -235,8 +231,7 @@ - (RLMRealmConfiguration *)configurationWithURL:(NSURL *)url
                                                         realmURL:url ?: self.defaultRealmURL
                                                    customFileURL:nil
                                                        isPartial:!fullSynchronization
-                                                      stopPolicy:RLMSyncStopPolicyAfterChangesUploaded
-                                                    errorHandler:nullptr];
+                                                      stopPolicy:RLMSyncStopPolicyAfterChangesUploaded];
     syncConfig.urlPrefix = urlPrefix;
     syncConfig.enableSSLValidation = enableSSLValidation;
     syncConfig.pinnedCertificateURL = RLMSyncManager.sharedManager.pinnedCertificatePaths[syncConfig.realmURL.host];
@@ -253,6 +248,14 @@ - (void)logOut {
     context_for(_user).invalidate_all_handles();
 }
 
+- (void)invalidate {
+    if (!_user) {
+        return;
+    }
+    context_for(_user).invalidate_all_handles();
+    _user = nullptr;
+}
+
 - (RLMUserErrorReportingBlock)errorHandler {
     if (!_user) {
         return nil;
@@ -342,7 +345,6 @@ - (void)changePassword:(NSString *)newPassword forUserID:(NSString *)userID comp
                                        JSON:@{kRLMSyncTokenKey: self.refreshToken,
                                               kRLMSyncUserIDKey: userID,
                                               kRLMSyncDataKey: @{kRLMSyncNewPasswordKey: newPassword}}
-                                    options:[[RLMSyncManager sharedManager] networkRequestOptions]
                                  completion:completion];
 }
 
@@ -351,7 +353,6 @@ + (void)requestPasswordResetForAuthServer:(NSURL *)serverURL
                                completion:(RLMPasswordChangeStatusBlock)completion {
     [RLMSyncUpdateAccountEndpoint sendRequestToServer:serverURL
                                                  JSON:@{@"provider_id": email, @"data": @{@"action": @"reset_password"}}
-                                              options:[[RLMSyncManager sharedManager] networkRequestOptions]
                                            completion:completion];
 }
 
@@ -363,7 +364,6 @@ + (void)completePasswordResetForAuthServer:(NSURL *)serverURL
                                                  JSON:@{@"data": @{@"action": @"complete_reset",
                                                                    @"token": token,
                                                                    @"new_password": newPassword}}
-                                              options:[[RLMSyncManager sharedManager] networkRequestOptions]
                                            completion:completion];
 }
 
@@ -371,8 +371,8 @@ + (void)requestEmailConfirmationForAuthServer:(NSURL *)serverURL
                                     userEmail:(NSString *)email
                                    completion:(RLMPasswordChangeStatusBlock)completion {
     [RLMSyncUpdateAccountEndpoint sendRequestToServer:serverURL
-                                                 JSON:@{@"provider_id": email, @"data": @{@"action": @"request_email_confirmation"}}
-                                              options:[[RLMSyncManager sharedManager] networkRequestOptions]
+                                                 JSON:@{@"provider_id": email,
+                                                        @"data": @{@"action": @"request_email_confirmation"}}
                                            completion:completion];
 }
 
@@ -382,7 +382,6 @@ + (void)confirmEmailForAuthServer:(NSURL *)serverURL
     [RLMSyncUpdateAccountEndpoint sendRequestToServer:serverURL
                                                  JSON:@{@"data": @{@"action": @"confirm_email",
                                                                    @"token": token}}
-                                              options:[[RLMSyncManager sharedManager] networkRequestOptions]
                                            completion:completion];
 }
 
@@ -391,130 +390,188 @@ + (void)confirmEmailForAuthServer:(NSURL *)serverURL
 - (void)retrieveInfoForUser:(NSString *)providerUserIdentity
            identityProvider:(RLMIdentityProvider)provider
                  completion:(RLMRetrieveUserBlock)completion {
-    [RLMNetworkClient sendRequestToEndpoint:[RLMSyncGetUserInfoEndpoint endpoint]
-                                     server:self.authenticationServer
-                                       JSON:@{
-                                              kRLMSyncProviderKey: provider,
-                                              kRLMSyncProviderIDKey: providerUserIdentity,
-                                              kRLMSyncTokenKey: self.refreshToken
-                                              }
-                                    timeout:60
-                                    options:[[RLMSyncManager sharedManager] networkRequestOptions]
-                                 completion:^(NSError *error, NSDictionary *json) {
-                                     if (error) {
-                                         completion(nil, error);
-                                         return;
-                                     }
-                                     RLMUserResponseModel *model = [[RLMUserResponseModel alloc] initWithDictionary:json];
-                                     if (!model) {
-                                         completion(nil, make_auth_error_bad_response(json));
-                                         return;
-                                     }
-                                     completion([RLMSyncUserInfo syncUserInfoWithModel:model], nil);
-                                 }];
+    [RLMSyncGetUserInfoEndpoint sendRequestToServer:self.authenticationServer
+                                               JSON:@{kRLMSyncProviderKey: provider,
+                                                      kRLMSyncProviderIDKey: providerUserIdentity,
+                                                      kRLMSyncTokenKey: self.refreshToken}
+                                            timeout:60
+                                         completion:^(NSError *error, NSDictionary *json) {
+        if (error) {
+            return completion(nil, error);
+        }
+        RLMUserResponseModel *model = [[RLMUserResponseModel alloc] initWithDictionary:json];
+        if (!model) {
+            return completion(nil, make_auth_error_bad_response(json));
+        }
+        completion([RLMSyncUserInfo syncUserInfoWithModel:model], nil);
+    }];
 }
 
 #pragma mark - Permissions API
 
-static void verifyInRunLoop() {
-    if (!RLMIsInRunLoop()) {
-        @throw RLMException(@"Can only access or modify permissions from a thread which has a run loop (by default, only the main thread).");
+namespace {
+NSError *checkUser(std::shared_ptr<SyncUser> const& user, NSString *msg) {
+    if (user && user->state() != SyncUser::State::Error) {
+        return nil;
     }
+    msg = [NSString stringWithFormat:@"Permissions cannot be %@ using an invalid user.", msg];
+    return [NSError errorWithDomain:RLMSyncPermissionErrorDomain code:RLMSyncAuthErrorInvalidParameters
+                           userInfo:@{NSLocalizedFailureReasonErrorKey: msg}];
+}
 }
 
 - (void)retrievePermissionsWithCallback:(RLMPermissionResultsBlock)callback {
-    verifyInRunLoop();
-    if (!_user || _user->state() == SyncUser::State::Error) {
-        callback(nullptr, make_permission_error_get(@"Permissions cannot be retrieved using an invalid user."));
+    if (NSError *error = checkUser(_user, @"retrieved")) {
+        callback(nullptr, error);
         return;
     }
-    Permissions::get_permissions(_user, RLMWrapPermissionResultsCallback(callback), *_configMaker);
+
+    [RLMSyncGetPermissionsEndpoint
+     sendRequestToServer:self.authenticationServer
+     JSON:@{kRLMSyncTokenKey: self.refreshToken}
+     timeout:60.0
+     completion:^(NSError *error, NSDictionary *json) {
+        if (error) {
+            return callback(nil, error);
+        }
+        // FIXME: ROS currently gives duplicated results for 'all' due to an incorrect query
+        NSMutableSet *permissions = [NSMutableSet new];
+        for (NSDictionary *permission in json[@"permissions"]) {
+            // ROS reports the permission for __wildcardpermissions, which we
+            // don't want to include
+            if ([permission[@"path"] hasPrefix:@"/__"]) {
+                continue;
+            }
+
+            // Wildcard permissions are reported as a null userId
+            id userId = permission[@"userId"];
+            if (userId == NSNull.null) {
+                userId = @"*";
+            }
+
+            [permissions addObject:[[RLMSyncPermission alloc]
+                                    initWithRealmPath:permission[@"path"]
+                                    identity:userId
+                                    accessLevel:RLMSyncAccessLevelFromString(permission[@"accessLevel"])]];
+        }
+        callback(permissions.allObjects, nil);
+    }];
 }
 
 - (void)applyPermission:(RLMSyncPermission *)permission callback:(RLMPermissionStatusBlock)callback {
-    verifyInRunLoop();
-    if (!_user || _user->state() == SyncUser::State::Error) {
-        callback(make_permission_error_change(@"Permissions cannot be applied using an invalid user."));
+    if (NSError *error = checkUser(_user, @"applied")) {
+        callback(error);
         return;
     }
-    Permissions::set_permission(_user,
-                                [permission rawPermission],
-                                RLMWrapPermissionStatusCallback(callback),
-                                *_configMaker);
-}
-
-- (void)revokePermission:(RLMSyncPermission *)permission callback:(RLMPermissionStatusBlock)callback {
-    verifyInRunLoop();
-    if (!_user || _user->state() == SyncUser::State::Error) {
-        callback(make_permission_error_change(@"Permissions cannot be revoked using an invalid user."));
-        return;
+    id condition;
+    if (permission.identity) {
+        condition = @{@"userId": permission.identity};
+    }
+    else {
+        condition = @{@"metadataKey": permission.key, @"metadataValue": permission.value};
     }
-    Permissions::delete_permission(_user,
-                                   [permission rawPermission],
-                                   RLMWrapPermissionStatusCallback(callback),
-                                   *_configMaker);
+    [RLMSyncApplyPermissionsEndpoint
+     sendRequestToServer:self.authenticationServer
+     JSON:@{kRLMSyncTokenKey: self.refreshToken,
+            @"condition": condition,
+            @"realmPath": permission.path,
+            @"accessLevel": RLMSyncAccessLevelToString(permission.accessLevel)}
+     completion:callback];
 }
 
 - (void)createOfferForRealmAtURL:(NSURL *)url
                      accessLevel:(RLMSyncAccessLevel)accessLevel
                       expiration:(NSDate *)expirationDate
                         callback:(RLMPermissionOfferStatusBlock)callback {
-    verifyInRunLoop();
-    if (!_user || _user->state() == SyncUser::State::Error) {
-        callback(nil, make_permission_error_change(@"A permission offer cannot be created using an invalid user."));
+    if (NSError *error = checkUser(_user, @"offered")) {
+        callback(nil, error);
         return;
     }
-    auto cb = [callback](util::Optional<std::string> token, std::exception_ptr ptr) {
-        if (ptr) {
-            NSError *error = translateSyncExceptionPtrToError(std::move(ptr), RLMPermissionActionTypeOffer);
-            REALM_ASSERT_DEBUG(error);
-            callback(nil, error);
-        } else {
-            REALM_ASSERT_DEBUG(token);
-            callback(@(token->c_str()), nil);
-        }
-    };
-    auto offer = PermissionOffer{
-        [tildeSubstitutedPathForRealmURL(url, self.identity) UTF8String],
-        accessLevelForObjCAccessLevel(accessLevel),
-        RLMTimestampForNSDate(expirationDate),
-    };
-    Permissions::make_offer(_user, std::move(offer), std::move(cb), *_configMaker);
+
+    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
+    dateFormatter.locale = [NSLocale localeWithLocaleIdentifier:@"en_US_POSIX"];
+    dateFormatter.dateFormat = @"yyyy-MM-dd'T'HH:mm:ssZZZZZ";
+    dateFormatter.calendar = [NSCalendar calendarWithIdentifier:NSCalendarIdentifierGregorian];
+
+    [RLMSyncOfferPermissionsEndpoint
+     sendRequestToServer:self.authenticationServer
+     JSON:@{kRLMSyncTokenKey: self.refreshToken,
+            @"expiresAt": expirationDate ? [RLMISO8601Formatter() stringFromDate:expirationDate] : NSNull.null,
+            @"realmPath": url.path,
+            @"accessLevel": RLMSyncAccessLevelToString(accessLevel)}
+     timeout:60.0
+     completion:^(NSError *error, NSDictionary *json) {
+        callback(json[@"token"], error);
+    }];
 }
 
 - (void)acceptOfferForToken:(NSString *)token
                    callback:(RLMPermissionOfferResponseStatusBlock)callback {
-    verifyInRunLoop();
-    if (!_user || _user->state() == SyncUser::State::Error) {
-        callback(nil, make_permission_error_change(@"A permission offer cannot be accepted by an invalid user."));
+    if (NSError *error = checkUser(_user, @"accepted")) {
+        callback(nil, error);
+        return;
+    }
+    [RLMSyncAcceptPermissionOfferEndpoint
+     sendRequestToServer:self.authenticationServer
+     JSON:@{kRLMSyncTokenKey: self.refreshToken, @"offerToken": token}
+     timeout:60.0
+     completion:^(NSError *error, NSDictionary *json) {
+        callback([self urlForPath:json[@"path"]], error);
+    }];
+}
+
+- (void)invalidateOfferForToken:(NSString *)token
+                       callback:(RLMPermissionStatusBlock)callback {
+    if (NSError *error = checkUser(_user, @"invalidated")) {
+        callback(error);
+        return;
+    }
+    [RLMSyncInvalidatePermissionOfferEndpoint
+     sendRequestToServer:self.authenticationServer
+     JSON:@{kRLMSyncTokenKey: self.refreshToken, @"offerToken": token}
+     timeout:60.0
+     completion:^(NSError *error, NSDictionary *) {
+        callback(error);
+    }];
+}
+
+- (void)retrievePermissionOffersWithCallback:(RLMPermissionOfferResultsBlock)callback {
+    if (NSError *error = checkUser(_user, @"retrieved")) {
+        callback(nullptr, error);
         return;
     }
-    NSURLComponents *baseURL = [NSURLComponents componentsWithURL:self.authenticationServer
-                                          resolvingAgainstBaseURL:YES];
-    if ([baseURL.scheme isEqualToString:@"http"]) {
-        baseURL.scheme = @"realm";
-    } else if ([baseURL.scheme isEqualToString:@"https"]) {
-        baseURL.scheme = @"realms";
-    }
-    auto cb = [baseURL, callback](util::Optional<std::string> raw_path, std::exception_ptr ptr) {
-        if (ptr) {
-            NSError *error = translateSyncExceptionPtrToError(std::move(ptr), RLMPermissionActionTypeAcceptOffer);
-            REALM_ASSERT_DEBUG(error);
-            callback(nil, error);
-        } else {
-            // Note that ROS currently vends the path to the Realm, so we need to construct the full URL ourselves.
-            REALM_ASSERT_DEBUG(raw_path);
-            baseURL.path = @(raw_path->c_str());
-            callback([baseURL URL], nil);
+
+    [RLMSyncGetPermissionOffersEndpoint
+     sendRequestToServer:self.authenticationServer
+     JSON:@{kRLMSyncTokenKey: self.refreshToken}
+     timeout:60.0
+     completion:^(NSError *error, NSDictionary *json) {
+        if (error) {
+            return callback(nil, error);
         }
-    };
-    Permissions::accept_offer(_user, [token UTF8String], std::move(cb), *_configMaker);
+        NSMutableArray *offers = [NSMutableArray new];
+        NSDateFormatter *formatter = RLMISO8601Formatter();
+        for (NSDictionary *offer in json[@"offers"]) {
+            NSString *expiresAt = RLMCoerceToNil(offer[@"expiresAt"]);
+            NSString *createdAt = RLMCoerceToNil(offer[@"createdAt"]);
+            [offers addObject:[[RLMSyncPermissionOffer alloc]
+                               initWithRealmPath:offer[@"realmPath"]
+                               token:offer[@"token"]
+                               expiresAt:expiresAt ? [formatter dateFromString:expiresAt] : nil
+                               createdAt:createdAt ? [formatter dateFromString:createdAt] : nil
+                               accessLevel:RLMSyncAccessLevelFromString(offer[@"accessLevel"])]];
+        }
+        callback(offers, nil);
+    }];
 }
 
 #pragma mark - Private API
 
-- (NSURL *)defaultRealmURL
-{
+- (NSURL *)urlForPath:(nullable NSString *)path {
+    if (!path) {
+        return nil;
+    }
+
     NSURLComponents *components = [NSURLComponents componentsWithURL:self.authenticationServer resolvingAgainstBaseURL:YES];
     if ([components.scheme caseInsensitiveCompare:@"http"] == NSOrderedSame)
         components.scheme = @"realm";
@@ -523,8 +580,13 @@ - (NSURL *)defaultRealmURL
     else
         @throw RLMException(@"The provided user's authentication server URL (%@) was not valid.", self.authenticationServer);
 
-    components.path = @"/default";
+    components.path = path;
     return components.URL;
+
+}
+
+- (NSURL *)defaultRealmURL {
+    return [self urlForPath:@"/default"];
 }
 
 + (void)_setUpBindingContextFactory {
@@ -544,88 +606,7 @@ - (NSString *)refreshToken {
     return _user;
 }
 
-+ (void)_performLogInForUser:(RLMSyncUser *)user
-                 credentials:(RLMSyncCredentials *)credentials
-               authServerURL:(NSURL *)authServerURL
-                     timeout:(NSTimeInterval)timeout
-               callbackQueue:(dispatch_queue_t)callbackQueue
-             completionBlock:(RLMUserCompletionBlock)completion {
-    // Special credential login should be treated differently.
-    if (credentials.provider == RLMIdentityProviderAccessToken) {
-        [self _performLoginForDirectAccessTokenCredentials:credentials
-                                                      user:user
-                                             authServerURL:authServerURL
-                                           completionBlock:completion];
-        return;
-    }
-    if (!authServerURL) {
-        @throw RLMException(@"A user cannot be logged in without specifying an authentication server URL.");
-    }
-
-    // Prepare login network request
-    NSMutableDictionary *json = [@{
-                                   kRLMSyncProviderKey: credentials.provider,
-                                   kRLMSyncDataKey: credentials.token,
-                                   kRLMSyncAppIDKey: [RLMSyncManager sharedManager].appID,
-                                   } mutableCopy];
-    NSMutableDictionary *info = [(credentials.userInfo ?: @{}) mutableCopy];
-
-    if ([info count] > 0) {
-        // Munge user info into the JSON request.
-        json[@"user_info"] = info;
-    }
-
-    RLMSyncCompletionBlock handler = ^(NSError *error, NSDictionary *json) {
-        if (json && !error) {
-            RLMAuthResponseModel *model = [[RLMAuthResponseModel alloc] initWithDictionary:json
-                                                                        requireAccessToken:NO
-                                                                       requireRefreshToken:YES];
-            if (!model) {
-                // Malformed JSON
-                NSError *badResponseError = make_auth_error_bad_response(json);
-                dispatch_async(callbackQueue, ^{
-                    completion(nil, badResponseError);
-                });
-                return;
-            } else {
-                std::string server_url = authServerURL.absoluteString.UTF8String;
-                SyncUserIdentifier identity{[model.refreshToken.tokenData.identity UTF8String], std::move(server_url)};
-                auto sync_user = SyncManager::shared().get_user(identity , [model.refreshToken.token UTF8String]);
-                if (!sync_user) {
-                    NSError *authError = make_auth_error_client_issue();
-                    dispatch_async(callbackQueue, ^{
-                        completion(nil, authError);
-                    });
-                    return;
-                }
-                sync_user->set_is_admin(model.refreshToken.tokenData.isAdmin);
-                user->_user = sync_user;
-                dispatch_async(callbackQueue, ^{
-                    completion(user, nil);
-                });
-            }
-        } else {
-            // Something else went wrong
-            dispatch_async(callbackQueue, ^{
-                completion(nil, error);
-            });
-        }
-    };
-
-    [RLMNetworkClient sendRequestToEndpoint:[RLMSyncAuthEndpoint endpoint]
-                                     server:authServerURL
-                                       JSON:json
-                                    timeout:timeout
-                                    options:[[RLMSyncManager sharedManager] networkRequestOptions]
-                                 completion:^(NSError *error, NSDictionary *dictionary) {
-                                     dispatch_async(callbackQueue, ^{
-                                         handler(error, dictionary);
-                                     });
-                                 }];
-}
-
 + (void)_performLoginForDirectAccessTokenCredentials:(RLMSyncCredentials *)credentials
-                                                user:(RLMSyncUser *)user
                                        authServerURL:(NSURL *)serverURL
                                      completionBlock:(nonnull RLMUserCompletionBlock)completion {
     NSString *identity = credentials.userInfo[kRLMSyncIdentityKey];
@@ -657,8 +638,30 @@ + (void)_performLoginForDirectAccessTokenCredentials:(RLMSyncCredentials *)crede
         completion(nil, make_auth_error_client_issue());
         return;
     }
-    user->_user = sync_user;
-    completion(user, nil);
+    completion([[RLMSyncUser alloc] initWithSyncUser:std::move(sync_user)], nil);
+}
+
++ (void)_performLoginForCustomRefreshTokenCredentials:(RLMSyncCredentials *)credentials
+                                        authServerURL:(NSURL *)serverURL
+                                      completionBlock:(nonnull RLMUserCompletionBlock)completion {
+    NSString *scheme = serverURL.scheme;
+    if (![scheme isEqualToString:@"http"] && ![scheme isEqualToString:@"https"]) {
+        @throw RLMException(@"The Realm Object Server authentication URL provided for this user, \"%@\", "
+                            @" is invalid. It must begin with http:// or https://.", serverURL);
+    }
+
+    NSString *identity = credentials.userInfo[kRLMSyncIdentityKey];
+    SyncUserIdentifier identifier{identity.UTF8String, serverURL.absoluteString.UTF8String};
+
+    std::shared_ptr<SyncUser> sync_user = SyncManager::shared().get_user(std::move(identifier), credentials.token.UTF8String);
+    if (!sync_user) {
+        completion(nil, make_auth_error_client_issue());
+        return;
+    }
+
+    NSNumber *isAdmin = credentials.userInfo[kRLMSyncIsAdminKey];
+    sync_user->set_is_admin(isAdmin.boolValue);
+    completion([[RLMSyncUser alloc] initWithSyncUser:std::move(sync_user)], nil);
 }
 
 @end
diff --git a/Pods/Realm/Realm/RLMSyncUtil.mm b/Pods/Realm/Realm/RLMSyncUtil.mm
index 46c90c5..980ba46 100644
--- a/Pods/Realm/Realm/RLMSyncUtil.mm
+++ b/Pods/Realm/Realm/RLMSyncUtil.mm
@@ -29,7 +29,6 @@
 
 #import "shared_realm.hpp"
 
-#import "sync/sync_permission.hpp"
 #import "sync/sync_user.hpp"
 
 RLMIdentityProvider const RLMIdentityProviderAccessToken = @"_access_token";
@@ -73,21 +72,6 @@ uint8_t RLMGetComputedPermissions(RLMRealm *realm, id _Nullable object) {
 
 #pragma mark - C++ APIs
 
-namespace {
-
-NSError *make_permission_error(NSString *description, util::Optional<NSInteger> code, RLMSyncPermissionError type) {
-    NSMutableDictionary *userInfo = [NSMutableDictionary dictionary];
-    if (description) {
-        userInfo[NSLocalizedDescriptionKey] = description;
-    }
-    if (code) {
-        userInfo[kRLMSyncErrorStatusCodeKey] = @(*code);
-    }
-    return [NSError errorWithDomain:RLMSyncPermissionErrorDomain code:type userInfo:userInfo];
-}
-
-}
-
 SyncSessionStopPolicy translateStopPolicy(RLMSyncStopPolicy stopPolicy) {
     switch (stopPolicy) {
         case RLMSyncStopPolicyImmediately:              return SyncSessionStopPolicy::Immediately;
@@ -106,32 +90,6 @@ RLMSyncStopPolicy translateStopPolicy(SyncSessionStopPolicy stop_policy) {
     REALM_UNREACHABLE();
 }
 
-NSError *translateSyncExceptionPtrToError(std::exception_ptr ptr, RLMPermissionActionType type) {
-    NSError *error = nil;
-    try {
-        std::rethrow_exception(ptr);
-    } catch (PermissionActionException const& ex) {
-        switch (type) {
-            case RLMPermissionActionTypeGet:
-                error = make_permission_error_get(@(ex.what()), ex.code);
-                break;
-            case RLMPermissionActionTypeChange:
-                error = make_permission_error_change(@(ex.what()), ex.code);
-                break;
-            case RLMPermissionActionTypeOffer:
-                error = make_permission_error_offer(@(ex.what()), ex.code);
-                break;
-            case RLMPermissionActionTypeAcceptOffer:
-                error = make_permission_error_accept_offer(@(ex.what()), ex.code);
-                break;
-        }
-    }
-    catch (const std::exception &exp) {
-        RLMSetErrorOrThrow(RLMMakeError(RLMErrorFail, exp), &error);
-    }
-    return error;
-}
-
 std::shared_ptr<SyncSession> sync_session_for_realm(RLMRealm *realm) {
     Realm::Config realmConfig = realm.configuration.config;
     if (auto config = realmConfig.sync_config) {
@@ -148,34 +106,6 @@ RLMSyncStopPolicy translateStopPolicy(SyncSessionStopPolicy stop_policy) {
     return *std::static_pointer_cast<CocoaSyncUserContext>(user->binding_context());
 }
 
-AccessLevel accessLevelForObjCAccessLevel(RLMSyncAccessLevel level) {
-    switch (level) {
-        case RLMSyncAccessLevelNone:
-            return AccessLevel::None;
-        case RLMSyncAccessLevelRead:
-            return AccessLevel::Read;
-        case RLMSyncAccessLevelWrite:
-            return AccessLevel::Write;
-        case RLMSyncAccessLevelAdmin:
-            return AccessLevel::Admin;
-    }
-    REALM_UNREACHABLE();
-}
-
-RLMSyncAccessLevel objCAccessLevelForAccessLevel(AccessLevel level) {
-    switch (level) {
-        case AccessLevel::None:
-            return RLMSyncAccessLevelNone;
-        case AccessLevel::Read:
-            return RLMSyncAccessLevelRead;
-        case AccessLevel::Write:
-            return RLMSyncAccessLevelWrite;
-        case AccessLevel::Admin:
-            return RLMSyncAccessLevelAdmin;
-    }
-    REALM_UNREACHABLE();
-}
-
 NSError *make_auth_error_bad_response(NSDictionary *json) {
     return [NSError errorWithDomain:RLMSyncAuthErrorDomain
                                code:RLMSyncAuthErrorBadResponse
@@ -205,22 +135,6 @@ RLMSyncAccessLevel objCAccessLevelForAccessLevel(AccessLevel level) {
     return [NSError errorWithDomain:RLMSyncAuthErrorDomain code:model.code userInfo:userInfo];
 }
 
-NSError *make_permission_error_get(NSString *description, util::Optional<NSInteger> code) {
-    return make_permission_error(description, std::move(code), RLMSyncPermissionErrorGetFailed);
-}
-
-NSError *make_permission_error_change(NSString *description, util::Optional<NSInteger> code) {
-    return make_permission_error(description, std::move(code), RLMSyncPermissionErrorChangeFailed);
-}
-
-NSError *make_permission_error_offer(NSString *description, util::Optional<NSInteger> code) {
-    return make_permission_error(description, std::move(code), RLMSyncPermissionErrorOfferFailed);
-}
-
-NSError *make_permission_error_accept_offer(NSString *description, util::Optional<NSInteger> code) {
-    return make_permission_error(description, std::move(code), RLMSyncPermissionErrorAcceptOfferFailed);
-}
-
 NSError *make_sync_error(RLMSyncSystemErrorKind kind, NSString *description, NSInteger code, NSDictionary *custom) {
     NSMutableDictionary *buffer = [custom ?: @{} mutableCopy];
     buffer[NSLocalizedDescriptionKey] = description;
diff --git a/Pods/Realm/Realm/RLMUtil.mm b/Pods/Realm/Realm/RLMUtil.mm
index 1298602..1a9307c 100644
--- a/Pods/Realm/Realm/RLMUtil.mm
+++ b/Pods/Realm/Realm/RLMUtil.mm
@@ -29,6 +29,10 @@
 
 #import "shared_realm.hpp"
 
+#if REALM_ENABLE_SYNC
+#import "RLMSyncUtil.h"
+#endif
+
 #import <realm/mixed.hpp>
 #import <realm/table_view.hpp>
 
@@ -108,6 +112,20 @@ static inline bool checkArrayType(__unsafe_unretained RLMArray *const array,
         && (type != RLMPropertyTypeObject || [array.objectClassName isEqualToString:objectClassName]);
 }
 
+id (*RLMSwiftAsFastEnumeration)(id);
+id<NSFastEnumeration> RLMAsFastEnumeration(__unsafe_unretained id obj) {
+    if (!obj) {
+        return nil;
+    }
+    if ([obj conformsToProtocol:@protocol(NSFastEnumeration)]) {
+        return obj;
+    }
+    if (RLMSwiftAsFastEnumeration) {
+        return RLMSwiftAsFastEnumeration(obj);
+    }
+    return nil;
+}
+
 BOOL RLMValidateValue(__unsafe_unretained id const value,
                       RLMPropertyType type, bool optional, bool array,
                       __unsafe_unretained NSString *const objectClassName) {
@@ -118,9 +136,9 @@ BOOL RLMValidateValue(__unsafe_unretained id const value,
         if (auto rlmArray = asRLMArray(value)) {
             return checkArrayType(rlmArray, type, optional, objectClassName);
         }
-        if ([value conformsToProtocol:@protocol(NSFastEnumeration)]) {
+        if (id enumeration = RLMAsFastEnumeration(value)) {
             // check each element for compliance
-            for (id el in (id<NSFastEnumeration>)value) {
+            for (id el in enumeration) {
                 if (!RLMValidateValue(el, type, optional, false, objectClassName)) {
                     return NO;
                 }
@@ -196,7 +214,8 @@ void RLMValidateValueForProperty(__unsafe_unretained id const obj,
         if (!obj || obj == NSNull.null) {
             return;
         }
-        if (![obj conformsToProtocol:@protocol(NSFastEnumeration)]) {
+        id enumeration = RLMAsFastEnumeration(obj);
+        if (!enumeration) {
             @throw RLMException(@"Invalid value (%@) for '%@%s' array property '%@.%@': value is not enumerable.",
                                 obj, prop.objectClassName ?: RLMTypeToString(prop.type), prop.optional ? "?" : "",
                                 objectSchema.className, prop.name);
@@ -215,7 +234,7 @@ void RLMValidateValueForProperty(__unsafe_unretained id const obj,
             return;
         }
 
-        for (id value in obj) {
+        for (id value in enumeration) {
             if (!RLMValidateValue(value, prop.type, prop.optional, false, prop.objectClassName)) {
                 RLMThrowTypeError(value, objectSchema, prop);
             }
@@ -313,12 +332,23 @@ BOOL RLMIsObjectValidForProperty(__unsafe_unretained id const obj,
 }
 
 NSError *RLMMakeError(std::system_error const& exception) {
+    int code = exception.code().value();
     BOOL isGenericCategoryError = (exception.code().category() == std::generic_category());
     NSString *category = @(exception.code().category().name());
     NSString *errorDomain = isGenericCategoryError ? NSPOSIXErrorDomain : RLMUnknownSystemErrorDomain;
+#if REALM_ENABLE_SYNC
+    if (exception.code().category() == realm::sync::client_error_category()) {
+        if (exception.code().value() == static_cast<int>(realm::sync::Client::Error::connect_timeout)) {
+            errorDomain = NSPOSIXErrorDomain;
+            code = ETIMEDOUT;
+        }
+        else {
+            errorDomain = RLMSyncErrorDomain;
+        }
+    }
+#endif
 
-    return [NSError errorWithDomain:errorDomain
-                               code:exception.code().value()
+    return [NSError errorWithDomain:errorDomain code:code
                            userInfo:@{NSLocalizedDescriptionKey: @(exception.what()),
                                       @"Error Code": @(exception.code().value()),
                                       @"Category": category}];
@@ -416,3 +446,12 @@ id RLMMixedToObjc(realm::Mixed const& mixed) {
     return path;
 #endif
 }
+
+NSDateFormatter *RLMISO8601Formatter() {
+    // note: NSISO8601DateFormatter can't be used as it doesn't support milliseconds
+    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
+    dateFormatter.locale = [NSLocale localeWithLocaleIdentifier:@"en_US_POSIX"];
+    dateFormatter.dateFormat = @"yyyy-MM-dd'T'HH:mm:ss.SSSZ";
+    dateFormatter.calendar = [NSCalendar calendarWithIdentifier:NSCalendarIdentifierGregorian];
+    return dateFormatter;
+}
diff --git a/Pods/Realm/build.sh b/Pods/Realm/build.sh
index 558a1ce..210c0aa 100755
--- a/Pods/Realm/build.sh
+++ b/Pods/Realm/build.sh
@@ -6,8 +6,8 @@
 # (C) Copyright 2011-2015 by realm.io.
 ##################################################################################
 
-# Warning: pipefail is not a POSIX compatible option, but on OS X it works just fine.
-#          OS X uses a POSIX complain version of bash as /bin/sh, but apparently it does
+# Warning: pipefail is not a POSIX compatible option, but on macOS it works just fine.
+#          macOS uses a POSIX complain version of bash as /bin/sh, but apparently it does
 #          not strip away this feature. Also, this will fail if somebody forces the script
 #          to be run with zsh.
 set -o pipefail
@@ -16,6 +16,8 @@ set -e
 source_root="$(dirname "$0")"
 
 # You can override the version of the core library
+: ${REALM_BASE_URL:="https://static.realm.io/downloads"} # set it if you need to use a remote repo
+
 : ${REALM_CORE_VERSION:=$(sed -n 's/^REALM_CORE_VERSION=\(.*\)$/\1/p' ${source_root}/dependencies.list)} # set to "current" to always use the current build
 
 : ${REALM_SYNC_VERSION:=$(sed -n 's/^REALM_SYNC_VERSION=\(.*\)$/\1/p' ${source_root}/dependencies.list)}
@@ -43,7 +45,7 @@ command:
   clean:                clean up/remove all generated files
   download-core:        downloads core library (binary version)
   download-sync:        downloads sync library (binary version, core+sync)
-  build:                builds all iOS  and OS X frameworks
+  build:                builds all iOS and macOS frameworks
   ios-static:           builds fat iOS static framework
   ios-dynamic:          builds iOS dynamic frameworks
   ios-swift:            builds RealmSwift frameworks for iOS
@@ -51,11 +53,12 @@ command:
   watchos-swift:        builds RealmSwift framework for watchOS
   tvos:                 builds tvOS framework
   tvos-swift:           builds RealmSwift framework for tvOS
-  osx:                  builds OS X framework
-  osx-swift:            builds RealmSwift framework for OS X
-  analyze-osx:          analyzes OS X framework
-  test:                 tests all iOS and OS X frameworks
-  test-all:             tests all iOS and OS X frameworks in both Debug and Release configurations
+  osx:                  builds macOS framework
+  osx-swift:            builds RealmSwift framework for macOS
+  xcframework [plats]:  builds xcframeworks for Realm and RealmSwift for given platforms
+  analyze-osx:          analyzes macOS framework
+  test:                 tests all iOS and macOS frameworks
+  test-all:             tests all iOS and macOS frameworks in both Debug and Release configurations
   test-ios-static:      tests static iOS framework on 32-bit and 64-bit simulators
   test-ios-dynamic:     tests dynamic iOS framework on 32-bit and 64-bit simulators
   test-ios-swift:       tests RealmSwift iOS framework on 32-bit and 64-bit simulators
@@ -65,15 +68,16 @@ command:
   test-tvos:            tests tvOS framework
   test-tvos-swift:      tests RealmSwift tvOS framework
   test-tvos-devices:    tests ObjC & Swift tvOS frameworks on all attached tvOS devices
-  test-osx:             tests OS X framework
-  test-osx-swift:       tests RealmSwift OS X framework
+  test-osx:             tests macOS framework
+  test-osx-swift:       tests RealmSwift macOS framework
+  test-swiftpm:         tests ObjC and Swift macOS frameworks via SwiftPM
   verify:               verifies docs, osx, osx-swift, ios-static, ios-dynamic, ios-swift, ios-device in both Debug and Release configurations, swiftlint
   verify-osx-object-server:  downloads the Realm Object Server and runs the Objective-C and Swift integration tests
   docs:                 builds docs in docs/output
   examples:             builds all examples
   examples-ios:         builds all static iOS examples
   examples-ios-swift:   builds all Swift iOS examples
-  examples-osx:         builds all OS X examples
+  examples-osx:         builds all macOS examples
   get-version:          get the current version
   set-version version:  set the version
   cocoapods-setup:      download realm-core and create a stub RLMPlatform.h file to enable building via CocoaPods
@@ -124,7 +128,7 @@ xc() {
 }
 
 xctest() {
-  xc "$@" build
+  xc "$@" build-for-testing
   xc "$@" test
 }
 
@@ -145,25 +149,18 @@ build_combined() {
     local os_name=""
     if [[ "$os" == "iphoneos" ]]; then
         os_name="ios"
-        destination="iPhone 6"
+        destination="iPhone 8"
     elif [[ "$os" == "watchos"  ]]; then
         os_name="$os"
-        if (( $(xcode_version_major) >= 10 )); then
-            destination="Apple Watch Series 3 - 42mm"
-        else
-            destination="Apple Watch - 42mm"
-        fi
+        destination="Apple Watch Series 3 - 42mm"
     elif [[ "$os" == "appletvos"  ]]; then
         os_name="tvos"
-        if (( $(xcode_version_major) >= 9 )); then
-            destination="Apple TV"
-        else
-            destination="Apple TV 1080p"
-        fi
+        destination="Apple TV"
     fi
 
     # Derive build paths
     local build_products_path="build/DerivedData/Realm/Build/Products"
+    local build_intermediates_path="build/DerivedData/Realm/Build/Intermediates.noindex"
     local product_name="$module_name.framework"
     local binary_path="$module_name"
     local os_path="$build_products_path/$config-$os$scope_suffix/$product_name"
@@ -179,6 +176,20 @@ build_combined() {
       cp $simulator_path/Modules/$module_name.swiftmodule/* $os_path/Modules/$module_name.swiftmodule/
     fi
 
+    # Xcode 10.2 merges the generated headers together with ifdef guards for
+    # each of the target platforms. This doesn't handle merging
+    # device/simulator builds, so we need to take care of that ourselves.
+    # Currently all platforms have identical headers, so we just pick one and
+    # use that rather than merging, but this may change in the future.
+    if [ -f $os_path/Headers/$module_name-Swift.h ]; then
+      unique_headers=$(find $build_intermediates_path -name $module_name-Swift.h -exec shasum {} \; | cut -d' ' -f 1 | uniq | grep -c '^')
+      if [ $unique_headers != "1" ]; then
+        echo "Platform-specific Swift generated headers are not identical. Merging them is required and is not yet implemented."
+        exit 1
+      fi
+      find $build_intermediates_path -name $module_name-Swift.h -exec cp {} $os_path/Headers \; -quit
+    fi
+
     # Copy *.bcsymbolmap to .framework for submitting app with bitcode
     copy_bcsymbolmap "$build_products_path/$config-$os$scope_suffix" "$os_path"
 
@@ -196,6 +207,12 @@ build_combined() {
     fi
 }
 
+copy_realm_framework() {
+    local platform="$1"
+    rm -rf build/$platform/swift-$REALM_XCODE_VERSION/Realm.framework
+    cp -R build/$platform/Realm.framework build/$platform/swift-$REALM_XCODE_VERSION
+}
+
 clean_retrieve() {
   mkdir -p "$2"
   rm -rf "$2/$3"
@@ -210,20 +227,14 @@ move_to_clean_dir() {
 
 test_ios_static() {
     destination="$1"
-    xc "-scheme 'Realm iOS static' -configuration $CONFIGURATION -sdk iphonesimulator -destination '$destination' build"
-    if (( $(xcode_version_major) < 9 )); then
-        xc "-scheme 'Realm iOS static' -configuration $CONFIGURATION -sdk iphonesimulator -destination '$destination' test 'ARCHS=\$(ARCHS_STANDARD_32_BIT)'"
-    fi
-
-    # Xcode's depending tracking is lacking and it doesn't realize that the Realm static framework's static library
-    # needs to be recreated when the active architectures change. Help Xcode out by removing the static library.
-    settings=$(xcode "-scheme 'Realm iOS static' -configuration $CONFIGURATION -sdk iphonesimulator -destination '$destination' -showBuildSettings")
-    path=$(echo "$settings" | awk '/CONFIGURATION_BUILD_DIR/ { cbd = $3; } /EXECUTABLE_PATH/ { ep = $3; } END { printf "%s/%s\n", cbd, ep; }')
-    rm "$path"
-
+    xc "-scheme 'Realm iOS static' -configuration $CONFIGURATION -sdk iphonesimulator -destination '$destination' build-for-testing"
     xc "-scheme 'Realm iOS static' -configuration $CONFIGURATION -sdk iphonesimulator -destination '$destination' test"
 }
 
+plist_get() {
+    /usr/libexec/PlistBuddy -c "Print :$2" $1 2> /dev/null
+}
+
 ######################################
 # Device Test Helper
 ######################################
@@ -319,16 +330,16 @@ download_common() {
 
     if [ "$download_type" == "core" ]; then
         version=$REALM_CORE_VERSION
-        url="https://static.realm.io/downloads/core/realm-core-${version}.tar.xz"
+        url="${REALM_BASE_URL}/core/realm-core-${version}.tar.xz"
     elif [ "$download_type" == "sync" ]; then
         version=$REALM_SYNC_VERSION
-        url="https://static.realm.io/downloads/sync/realm-sync-cocoa-${version}.tar.xz"
+        url="${REALM_BASE_URL}/sync/realm-sync-cocoa-${version}.tar.xz"
     else
         echo "Unknown dowload_type: $download_type"
         exit 1
     fi
 
-    echo "Downloading dependency: ${download_type} ${version}"
+    echo "Downloading dependency: ${download_type} ${version} from ${url}"
 
     if [ -z "$TMPDIR" ]; then
         TMPDIR='/tmp'
@@ -378,18 +389,13 @@ download_sync() {
 COMMAND="$1"
 
 # Use Debug config if command ends with -debug, otherwise default to Release
-# Set IS_RUNNING_PACKAGING when running packaging steps to avoid running iOS static tests with Xcode 8.3.3
 case "$COMMAND" in
     *-debug)
         COMMAND="${COMMAND%-debug}"
         CONFIGURATION="Debug"
         ;;
-    package-*)
-        IS_RUNNING_PACKAGING=1
-        ;;
 esac
 export CONFIGURATION=${CONFIGURATION:-Release}
-export IS_RUNNING_PACKAGING=${IS_RUNNING_PACKAGING:-0}
 
 # Pre-choose Xcode and Swift versions for those operations that do not set them
 REALM_XCODE_VERSION=${xcode_version:-$REALM_XCODE_VERSION}
@@ -512,8 +518,8 @@ case "$COMMAND" in
 
     "ios-swift")
         sh build.sh ios-dynamic
-        build_combined RealmSwift RealmSwift iphoneos iphonesimulator '' "/swift-$REALM_SWIFT_VERSION"
-        cp -R build/ios/Realm.framework build/ios/swift-$REALM_SWIFT_VERSION
+        build_combined RealmSwift RealmSwift iphoneos iphonesimulator '' "/swift-$REALM_XCODE_VERSION"
+        copy_realm_framework ios
         exit 0
         ;;
 
@@ -524,8 +530,8 @@ case "$COMMAND" in
 
     "watchos-swift")
         sh build.sh watchos
-        build_combined RealmSwift RealmSwift watchos watchsimulator '' "/swift-$REALM_SWIFT_VERSION"
-        cp -R build/watchos/Realm.framework build/watchos/swift-$REALM_SWIFT_VERSION
+        build_combined RealmSwift RealmSwift watchos watchsimulator '' "/swift-$REALM_XCODE_VERSION"
+        copy_realm_framework watchos
         exit 0
         ;;
 
@@ -536,8 +542,8 @@ case "$COMMAND" in
 
     "tvos-swift")
         sh build.sh tvos
-        build_combined RealmSwift RealmSwift appletvos appletvsimulator '' "/swift-$REALM_SWIFT_VERSION"
-        cp -R build/tvos/Realm.framework build/tvos/swift-$REALM_SWIFT_VERSION
+        build_combined RealmSwift RealmSwift appletvos appletvsimulator '' "/swift-$REALM_XCODE_VERSION"
+        copy_realm_framework tvos
         exit 0
         ;;
 
@@ -550,12 +556,183 @@ case "$COMMAND" in
     "osx-swift")
         sh build.sh osx
         xc "-scheme 'RealmSwift' -configuration $CONFIGURATION build"
-        destination="build/osx/swift-$REALM_SWIFT_VERSION"
+        destination="build/osx/swift-$REALM_XCODE_VERSION"
         clean_retrieve "build/DerivedData/Realm/Build/Products/$CONFIGURATION/RealmSwift.framework" "$destination" "RealmSwift.framework"
+        rm -rf "$destination/Realm.framework"
         cp -R build/osx/Realm.framework "$destination"
         exit 0
         ;;
 
+    "catalyst")
+        if (( $(xcode_version_major) < 11 )); then
+            echo 'Building for Catalyst requires Xcode 11'
+            exit 1
+        fi
+
+        xc "-scheme Realm -configuration $CONFIGURATION REALM_CATALYST_FLAGS='-target x86_64-apple-ios13.0-macabi' REALM_PLATFORM_SUFFIX='maccatalyst'"
+        clean_retrieve "build/DerivedData/Realm/Build/Products/$CONFIGURATION/Realm.framework" "build/catalyst" "Realm.framework"
+        ;;
+
+    "catalyst-swift")
+        if (( $(xcode_version_major) < 11 )); then
+            echo 'Building for Catalyst requires Xcode 11'
+            exit 1
+        fi
+
+        sh build.sh catalyst
+        # FIXME: change this to just "-destination variant='Mac Catalyst'" once the CI machines are running 10.15
+        xc "-scheme 'RealmSwift' -configuration $CONFIGURATION build \
+            REALM_CATALYST_FLAGS='-target x86_64-apple-ios13.0-macabi' \
+            REALM_PLATFORM_SUFFIX='maccatalyst' \
+            SWIFT_DEPLOYMENT_TARGET='13.0-macabi' \
+            SWIFT_PLATFORM_TARGET_PREFIX='ios'"
+        destination="build/catalyst/swift-$REALM_XCODE_VERSION"
+        clean_retrieve "build/DerivedData/Realm/Build/Products/$CONFIGURATION/RealmSwift.framework" "$destination" "RealmSwift.framework"
+        rm -rf "$destination/Realm.framework"
+        cp -R build/catalyst/Realm.framework "$destination"
+        ;;
+
+    "xcframework")
+        if (( $(xcode_version_major) < 11 )); then
+            echo 'Building a xcframework requires Xcode 11'
+            exit 1
+        fi
+
+        export REALM_EXTRA_BUILD_ARGUMENTS="$REALM_EXTRA_BUILD_ARGUMENTS BUILD_LIBRARY_FOR_DISTRIBUTION=YES REALM_OBJC_MACH_O_TYPE=staticlib"
+
+        # Build all of the requested frameworks
+        shift
+        PLATFORMS="${*:-osx ios watchos tvos catalyst}"
+        for platform in $PLATFORMS; do
+            sh build.sh $platform-swift
+        done
+
+        # Assemble them into xcframeworks
+        rm -rf build/*.xcframework
+        find build/DerivedData/Realm/Build/Products -name 'Realm.framework' \
+            | grep -v '\-static' \
+            | sed 's/.*/-framework &/' \
+            | xargs xcodebuild -create-xcframework -output build/Realm.xcframework
+        find build/DerivedData/Realm/Build/Products -name 'RealmSwift.framework' \
+            | sed 's/.*/-framework &/' \
+            | xargs xcodebuild -create-xcframework -output build/RealmSwift.xcframework
+
+        # strip-frameworks.sh isn't needed with xcframeworks since we don't
+        # lipo together device/simulator libs
+        find build/Realm.xcframework -name 'strip-frameworks.sh' -delete
+        find build/RealmSwift.xcframework -name 'strip-frameworks.sh' -delete
+
+        # swiftinterface files currently have incorrect name resolution which
+        # results in the RealmSwift.Realm class name clashing with the Realm
+        # module name. Work around this by renaming the Realm module to
+        # RealmObjc. This is safe to do with a pre-built library because the
+        # module name is unrelated to what symbols are exported by an obj-c
+        # library, and we're statically linking the obj-c library into the
+        # swift library so it doesn't need to be loaded at runtime.
+        cd build
+        cp -R Realm.xcframework RealmObjc.xcframework
+        find RealmObjc.xcframework -name 'Realm.framework' \
+            -execdir mv {} RealmObjc.framework \; || true 2> /dev/null
+        find RealmObjc.xcframework -name '*.h' \
+            -exec sed -i '' 's/Realm\//RealmObjc\//' {} \;
+        find RealmObjc.xcframework -name 'module.modulemap' \
+            -exec sed -i '' 's/module Realm/module RealmObjc/' {} \;
+        sed -i '' 's/Realm.framework/RealmObjc.framework/' RealmObjc.xcframework/Info.plist
+
+        find RealmSwift.xcframework -name '*.swiftinterface' \
+            -exec sed -i '' 's/import Realm/import RealmObjc/' {} \;
+        find RealmSwift.xcframework -name '*.swiftinterface' \
+            -exec sed -i '' 's/Realm.RLM/RealmObjc.RLM/g' {} \;
+
+        # Realm is statically linked into RealmSwift so we no longer actually
+        # need the obj-c static library, and just need the framework shell.
+        # Remove everything but placeholder.o so that there's still a library
+        # to link against that just doesn't define any symbols.
+        find RealmObjc.xcframework -name 'Realm' | while read file; do
+            (
+                cd $(dirname $file)
+                if readlink Realm > /dev/null; then
+                    ln -sf Versions/Current/RealmObjc Realm
+                elif lipo -info Realm | grep -q 'Non-fat'; then
+                    ar -t Realm | grep -v placeholder | tr '\n' '\0' | xargs -0 ar -d Realm >/dev/null 2>&1
+                    ranlib Realm >/dev/null 2>&1
+                else
+                    for arch in $(lipo -info Realm | cut -f3 -d':'); do
+                        lipo Realm -thin $arch -output tmp.a
+                        ar -t tmp.a | grep -v placeholder | tr '\n' '\0' | xargs -0 ar -d tmp.a >/dev/null 2>&1
+                        ranlib tmp.a >/dev/null 2>&1
+                        lipo Realm -replace $arch tmp.a -output Realm
+                        rm tmp.a
+                    done
+                fi
+                mv Realm RealmObjc
+            )
+        done
+
+        # We built Realm.framework as a static framework so that we could link
+        # it into RealmSwift.framework and not have to deal with the runtime
+        # implications of renaming the shared library, but we want the end
+        # result to be that Realm.xcframework is a dynamic framework. Our build
+        # system isn't really set up to build both static and dynamic versions
+        # of it, so instead just turn each of the static libraries in
+        # Realm.xcframework into a shared library.
+        cd Realm.xcframework
+        i=0
+        while plist_get Info.plist "AvailableLibraries:$i" > /dev/null; do
+            arch_dir_name="$(plist_get Info.plist "AvailableLibraries:$i:LibraryIdentifier")"
+            platform="$(plist_get Info.plist "AvailableLibraries:$i:SupportedPlatform")"
+            variant="$(plist_get Info.plist "AvailableLibraries:$i:SupportedPlatformVariant" 2> /dev/null || echo 'os')"
+            deployment_target_name="$platform"
+            install_name='@rpath/Realm.framework/Realm'
+            bitcode_flag='-fembed-bitcode'
+            if [ "$variant" = 'simulator' ]; then
+                bitcode_flag=''
+            fi
+            case "$platform" in
+              "macos")   sdk='macosx'; install_name='@rpath/Realm.framework/Versions/A/Realm'; bitcode_flag='';;
+              "ios")     sdk="iphone$variant"; deployment_target_name='iphoneos';;
+              "watchos") sdk="watch$variant";;
+              "tvos")    sdk="appletv$variant";;
+            esac
+            deployment_target=$(grep -i "$deployment_target_name.*_DEPLOYMENT_TARGET" ../../Configuration/Base.xcconfig \
+                                | sed 's/.*= \(.*\);/\1/')
+            architectures=""
+            j=0
+            while plist_get Info.plist "AvailableLibraries:$i:SupportedArchitectures:$j" > /dev/null; do
+                architectures="${architectures} -arch $(plist_get Info.plist "AvailableLibraries:$i:SupportedArchitectures:$j")"
+                j=$(($j + 1))
+            done
+
+            (
+                cd $arch_dir_name/Realm.framework
+                realm_lib=$(readlink Realm || echo 'Realm')
+                # feature_token.cpp.o depends on PKey, which isn't actually
+                # present in the macOS build of the sync library. This normally
+                # works fine because we never reference any symbols from
+                # feature_token.cpp.o so it doesn't get pulled in at all, but
+                # -all_load makes every object file in the input get linked
+                # into the shared library.
+                ar -d $realm_lib feature_token.cpp.o 2> /dev/null || true
+                clang++ -shared $architectures \
+                    -target ${platform}${deployment_target} \
+                    -isysroot $(xcrun --sdk ${sdk} --show-sdk-path) \
+                    -install_name "$install_name" \
+                    -compatibility_version 1 -current_version 1 \
+                    -fapplication-extension \
+                    $bitcode_flag \
+                    -Wl,-all_load \
+                    -Wl,-unexported_symbol,'__Z*' \
+                    -o realm.dylib \
+                    Realm -lz
+                mv realm.dylib $realm_lib
+            )
+
+            i=$(($i + 1))
+        done
+
+        exit 0
+        ;;
+
     ######################################
     # Analysis
     ######################################
@@ -590,25 +767,19 @@ case "$COMMAND" in
         ;;
 
     "test-ios-static")
-        test_ios_static "name=iPhone 6"
+        test_ios_static "name=iPhone 8"
         exit 0
         ;;
 
     "test-ios-dynamic")
-        xc "-scheme Realm -configuration $CONFIGURATION -sdk iphonesimulator -destination 'name=iPhone 6' build"
-        if (( $(xcode_version_major) < 9 )); then
-            xc "-scheme Realm -configuration $CONFIGURATION -sdk iphonesimulator -destination 'name=iPhone 6' test 'ARCHS=\$(ARCHS_STANDARD_32_BIT)'"
-        fi
-        xc "-scheme Realm -configuration $CONFIGURATION -sdk iphonesimulator -destination 'name=iPhone 6' test"
+        xc "-scheme Realm -configuration $CONFIGURATION -sdk iphonesimulator -destination 'name=iPhone 8' build-for-testing"
+        xc "-scheme Realm -configuration $CONFIGURATION -sdk iphonesimulator -destination 'name=iPhone 8' test"
         exit 0
         ;;
 
     "test-ios-swift")
-        xc "-scheme RealmSwift -configuration $CONFIGURATION -sdk iphonesimulator -destination 'name=iPhone 6' build"
-        if (( $(xcode_version_major) < 9 )); then
-            xc "-scheme RealmSwift -configuration $CONFIGURATION -sdk iphonesimulator -destination 'name=iPhone 6' test 'ARCHS=\$(ARCHS_STANDARD_32_BIT)'"
-        fi
-        xc "-scheme RealmSwift -configuration $CONFIGURATION -sdk iphonesimulator -destination 'name=iPhone 6' test"
+        xc "-scheme RealmSwift -configuration $CONFIGURATION -sdk iphonesimulator -destination 'name=iPhone 8' build-for-testing"
+        xc "-scheme RealmSwift -configuration $CONFIGURATION -sdk iphonesimulator -destination 'name=iPhone 8' test"
         exit 0
         ;;
 
@@ -631,21 +802,13 @@ case "$COMMAND" in
         ;;
 
     "test-tvos")
-        if (( $(xcode_version_major) >= 9 )); then
-            destination="Apple TV"
-        else
-            destination="Apple TV 1080p"
-        fi
+        destination="Apple TV"
         xctest "-scheme Realm -configuration $CONFIGURATION -sdk appletvsimulator -destination 'name=$destination'"
         exit $?
         ;;
 
     "test-tvos-swift")
-        if (( $(xcode_version_major) >= 9 )); then
-            destination="Apple TV"
-        else
-            destination="Apple TV 1080p"
-        fi
+        destination="Apple TV"
         xctest "-scheme RealmSwift -configuration $CONFIGURATION -sdk appletvsimulator -destination 'name=$destination'"
         exit $?
         ;;
@@ -673,6 +836,16 @@ case "$COMMAND" in
         exit 0
         ;;
 
+    test-swiftpm*)
+        SANITIZER=$(echo $COMMAND | cut -d - -f 3)
+        if [ -n "$SANITIZER" ]; then
+            SANITIZER="--sanitize $SANITIZER"
+            export ASAN_OPTIONS='check_initialization_order=true:detect_stack_use_after_return=true'
+        fi
+        xcrun swift test --configuration $(echo $CONFIGURATION | tr "[:upper:]" "[:lower:]") $SANITIZER
+        exit 0
+        ;;
+
     ######################################
     # Full verification
     ######################################
@@ -696,6 +869,7 @@ case "$COMMAND" in
         sh build.sh verify-tvos-debug
         sh build.sh verify-tvos-device
         sh build.sh verify-swiftlint
+        sh build.sh verify-swiftpm
         sh build.sh verify-osx-object-server
         ;;
 
@@ -714,6 +888,11 @@ case "$COMMAND" in
           fi
         fi
 
+        sh build.sh verify-cocoapods-ios
+        sh build.sh verify-cocoapods-ios-dynamic
+        sh build.sh verify-cocoapods-osx
+        sh build.sh verify-cocoapods-watchos
+
         # https://github.com/CocoaPods/CocoaPods/issues/7708
         export EXPANDED_CODE_SIGN_IDENTITY=''
         cd examples/installation
@@ -726,6 +905,23 @@ case "$COMMAND" in
         sh build.sh test-watchos-swift-cocoapods
         ;;
 
+    verify-cocoapods-ios-dynamic)
+        PLATFORM=$(echo $COMMAND | cut -d - -f 3)
+        # https://github.com/CocoaPods/CocoaPods/issues/7708
+        export EXPANDED_CODE_SIGN_IDENTITY=''
+        cd examples/installation
+        sh build.sh test-ios-objc-cocoapods-dynamic
+        ;;
+
+    verify-cocoapods-*)
+        PLATFORM=$(echo $COMMAND | cut -d - -f 3)
+        # https://github.com/CocoaPods/CocoaPods/issues/7708
+        export EXPANDED_CODE_SIGN_IDENTITY=''
+        cd examples/installation
+        sh build.sh test-$PLATFORM-objc-cocoapods
+        sh build.sh test-$PLATFORM-swift-cocoapods
+        ;;
+
     "verify-osx-encryption")
         REALM_ENCRYPT_ALL=YES sh build.sh test-osx
         exit 0
@@ -733,7 +929,6 @@ case "$COMMAND" in
 
     "verify-osx")
         sh build.sh test-osx
-        sh build.sh analyze-osx
         sh build.sh examples-osx
 
         (
@@ -749,7 +944,7 @@ case "$COMMAND" in
         ;;
 
     "verify-ios-static")
-        sh build.sh test-ios-static
+        REALM_EXTRA_BUILD_ARGUMENTS="$REALM_EXTRA_BUILD_ARGUMENTS -workspace examples/ios/objc/RealmExamples.xcworkspace" sh build.sh test-ios-static
         sh build.sh examples-ios
         ;;
 
@@ -758,7 +953,7 @@ case "$COMMAND" in
         ;;
 
     "verify-ios-swift")
-        sh build.sh test-ios-swift
+        REALM_EXTRA_BUILD_ARGUMENTS="$REALM_EXTRA_BUILD_ARGUMENTS -workspace examples/ios/swift/RealmExamples.xcworkspace" sh build.sh test-ios-swift
         sh build.sh examples-ios-swift
         ;;
 
@@ -792,8 +987,12 @@ case "$COMMAND" in
 
     "verify-tvos")
         sh build.sh test-tvos
-        sh build.sh test-tvos-swift
         sh build.sh examples-tvos
+        exit 0
+        ;;
+
+    "verify-tvos-swift")
+        sh build.sh test-tvos-swift
         sh build.sh examples-tvos-swift
         exit 0
         ;;
@@ -808,6 +1007,11 @@ case "$COMMAND" in
         exit 0
         ;;
 
+    verify-swiftpm*)
+        sh build.sh test-$(echo $COMMAND | cut -d - -f 2-)
+        exit 0
+        ;;
+
     "verify-osx-object-server")
         sh build.sh test-osx-object-server
         exit 0
@@ -839,17 +1043,17 @@ case "$COMMAND" in
         sh build.sh prelaunch-simulator
         workspace="examples/ios/objc/RealmExamples.xcworkspace"
         pod install --project-directory="$workspace/.." --no-repo-update
-        xc "-workspace $workspace -scheme Simple -configuration $CONFIGURATION -destination 'name=iPhone 6' build ${CODESIGN_PARAMS}"
-        xc "-workspace $workspace -scheme TableView -configuration $CONFIGURATION -destination 'name=iPhone 6' build ${CODESIGN_PARAMS}"
-        xc "-workspace $workspace -scheme Migration -configuration $CONFIGURATION -destination 'name=iPhone 6' build ${CODESIGN_PARAMS}"
-        xc "-workspace $workspace -scheme Backlink -configuration $CONFIGURATION -destination 'name=iPhone 6' build ${CODESIGN_PARAMS}"
-        xc "-workspace $workspace -scheme GroupedTableView -configuration $CONFIGURATION -destination 'name=iPhone 6' build ${CODESIGN_PARAMS}"
-        xc "-workspace $workspace -scheme RACTableView -configuration $CONFIGURATION -destination 'name=iPhone 6' build ${CODESIGN_PARAMS}"
-        xc "-workspace $workspace -scheme Encryption -configuration $CONFIGURATION -destination 'name=iPhone 6' build ${CODESIGN_PARAMS}"
-        xc "-workspace $workspace -scheme Draw -configuration $CONFIGURATION -destination 'name=iPhone 6' build ${CODESIGN_PARAMS}"
+        xc "-workspace $workspace -scheme Simple -configuration $CONFIGURATION -destination 'name=iPhone 8' build ${CODESIGN_PARAMS}"
+        xc "-workspace $workspace -scheme TableView -configuration $CONFIGURATION -destination 'name=iPhone 8' build ${CODESIGN_PARAMS}"
+        xc "-workspace $workspace -scheme Migration -configuration $CONFIGURATION -destination 'name=iPhone 8' build ${CODESIGN_PARAMS}"
+        xc "-workspace $workspace -scheme Backlink -configuration $CONFIGURATION -destination 'name=iPhone 8' build ${CODESIGN_PARAMS}"
+        xc "-workspace $workspace -scheme GroupedTableView -configuration $CONFIGURATION -destination 'name=iPhone 8' build ${CODESIGN_PARAMS}"
+        xc "-workspace $workspace -scheme RACTableView -configuration $CONFIGURATION -destination 'name=iPhone 8' build ${CODESIGN_PARAMS}"
+        xc "-workspace $workspace -scheme Encryption -configuration $CONFIGURATION -destination 'name=iPhone 8' build ${CODESIGN_PARAMS}"
+        xc "-workspace $workspace -scheme Draw -configuration $CONFIGURATION -destination 'name=iPhone 8' build ${CODESIGN_PARAMS}"
 
         if [ ! -z "${JENKINS_HOME}" ]; then
-            xc "-workspace $workspace -scheme Extension -configuration $CONFIGURATION -destination 'name=iPhone 6' build ${CODESIGN_PARAMS}"
+            xc "-workspace $workspace -scheme Extension -configuration $CONFIGURATION -destination 'name=iPhone 8' build ${CODESIGN_PARAMS}"
         fi
 
         exit 0
@@ -859,15 +1063,15 @@ case "$COMMAND" in
         sh build.sh prelaunch-simulator
         workspace="examples/ios/swift/RealmExamples.xcworkspace"
         if [[ ! -d "$workspace" ]]; then
-            workspace="${workspace/swift/swift-$REALM_SWIFT_VERSION}"
+            workspace="${workspace/swift/swift-$REALM_XCODE_VERSION}"
         fi
 
-        xc "-workspace $workspace -scheme Simple -configuration $CONFIGURATION -destination 'name=iPhone 6' build ${CODESIGN_PARAMS}"
-        xc "-workspace $workspace -scheme TableView -configuration $CONFIGURATION -destination 'name=iPhone 6' build ${CODESIGN_PARAMS}"
-        xc "-workspace $workspace -scheme Migration -configuration $CONFIGURATION -destination 'name=iPhone 6' build ${CODESIGN_PARAMS}"
-        xc "-workspace $workspace -scheme Encryption -configuration $CONFIGURATION -destination 'name=iPhone 6' build ${CODESIGN_PARAMS}"
-        xc "-workspace $workspace -scheme Backlink -configuration $CONFIGURATION -destination 'name=iPhone 6' build ${CODESIGN_PARAMS}"
-        xc "-workspace $workspace -scheme GroupedTableView -configuration $CONFIGURATION -destination 'name=iPhone 6' build ${CODESIGN_PARAMS}"
+        xc "-workspace $workspace -scheme Simple -configuration $CONFIGURATION -destination 'name=iPhone 8' build ${CODESIGN_PARAMS}"
+        xc "-workspace $workspace -scheme TableView -configuration $CONFIGURATION -destination 'name=iPhone 8' build ${CODESIGN_PARAMS}"
+        xc "-workspace $workspace -scheme Migration -configuration $CONFIGURATION -destination 'name=iPhone 8' build ${CODESIGN_PARAMS}"
+        xc "-workspace $workspace -scheme Encryption -configuration $CONFIGURATION -destination 'name=iPhone 8' build ${CODESIGN_PARAMS}"
+        xc "-workspace $workspace -scheme Backlink -configuration $CONFIGURATION -destination 'name=iPhone 8' build ${CODESIGN_PARAMS}"
+        xc "-workspace $workspace -scheme GroupedTableView -configuration $CONFIGURATION -destination 'name=iPhone 8' build ${CODESIGN_PARAMS}"
         exit 0
         ;;
 
@@ -877,11 +1081,7 @@ case "$COMMAND" in
 
     "examples-tvos")
         workspace="examples/tvos/objc/RealmExamples.xcworkspace"
-        if (( $(xcode_version_major) >= 9 )); then
-            destination="Apple TV"
-        else
-            destination="Apple TV 1080p"
-        fi
+        destination="Apple TV"
 
         xc "-workspace $workspace -scheme DownloadCache -configuration $CONFIGURATION -destination 'name=$destination' build ${CODESIGN_PARAMS}"
         xc "-workspace $workspace -scheme PreloadedData -configuration $CONFIGURATION -destination 'name=$destination' build ${CODESIGN_PARAMS}"
@@ -891,15 +1091,10 @@ case "$COMMAND" in
     "examples-tvos-swift")
         workspace="examples/tvos/swift/RealmExamples.xcworkspace"
         if [[ ! -d "$workspace" ]]; then
-            workspace="${workspace/swift/swift-$REALM_SWIFT_VERSION}"
-        fi
-
-        if (( $(xcode_version_major) >= 9 )); then
-            destination="Apple TV"
-        else
-            destination="Apple TV 1080p"
+            workspace="${workspace/swift/swift-$REALM_XCODE_VERSION}"
         fi
 
+        destination="Apple TV"
         xc "-workspace $workspace -scheme DownloadCache -configuration $CONFIGURATION -destination 'name=$destination' build ${CODESIGN_PARAMS}"
         xc "-workspace $workspace -scheme PreloadedData -configuration $CONFIGURATION -destination 'name=$destination' build ${CODESIGN_PARAMS}"
         exit 0
@@ -909,8 +1104,7 @@ case "$COMMAND" in
     # Versioning
     ######################################
     "get-version")
-        version_file="Realm/Realm-Info.plist"
-        echo "$(PlistBuddy -c "Print :CFBundleShortVersionString" "$version_file")"
+        echo "$(plist_get 'Realm/Realm-Info.plist' 'CFBundleShortVersionString')"
         exit 0
         ;;
 
@@ -930,6 +1124,8 @@ case "$COMMAND" in
             PlistBuddy -c "Set :CFBundleShortVersionString $realm_version" "$version_file"
         done
         sed -i '' "s/^VERSION=.*/VERSION=$realm_version/" dependencies.list
+        sed -i '' "s/^let coreVersionStr =.*/let coreVersionStr = \"$REALM_CORE_VERSION\"/" Package.swift
+        sed -i '' "s/^let cocoaVersionStr =.*/let cocoaVersionStr = \"$realm_version\"/" Package.swift
         exit 0
         ;;
 
@@ -1056,7 +1252,9 @@ EOM
             export sha=$GITHUB_PR_SOURCE_BRANCH
             export CONFIGURATION=$configuration
             export REALM_EXTRA_BUILD_ARGUMENTS='GCC_GENERATE_DEBUGGING_SYMBOLS=NO -allowProvisioningUpdates'
-            sh build.sh prelaunch-simulator
+            if [[ ${target} != *"osx"* ]];then
+                sh build.sh prelaunch-simulator
+            fi
 
             source $(brew --prefix nvm)/nvm.sh
             export REALM_NODE_PATH="$(nvm which 8)"
@@ -1107,12 +1305,11 @@ EOM
         zip --symlinks -r realm-examples.zip examples -x "examples/installation/*"
         ;;
 
-    "package-test-examples")
+    "package-test-examples-objc")
         if ! VERSION=$(echo realm-objc-*.zip | egrep -o '\d*\.\d*\.\d*-[a-z]*(\.\d*)?'); then
             VERSION=$(echo realm-objc-*.zip | egrep -o '\d*\.\d*\.\d*')
         fi
         OBJC="realm-objc-${VERSION}"
-        SWIFT="realm-swift-${VERSION}"
         unzip ${OBJC}.zip
 
         cp $0 ${OBJC}
@@ -1123,7 +1320,13 @@ EOM
         sh build.sh examples-osx
         cd ..
         rm -rf ${OBJC}
+        ;;
 
+    "package-test-examples-swift")
+        if ! VERSION=$(echo realm-swift-*.zip | egrep -o '\d*\.\d*\.\d*-[a-z]*(\.\d*)?'); then
+            VERSION=$(echo realm-swift-*.zip | egrep -o '\d*\.\d*\.\d*')
+        fi
+        SWIFT="realm-swift-${VERSION}"
         unzip ${SWIFT}.zip
 
         cp $0 ${SWIFT}
@@ -1143,124 +1346,21 @@ EOM
         zip --symlinks -r realm-framework-ios-static.zip Realm.framework
         ;;
 
-    "package-ios")
-        sh build.sh prelaunch-simulator
-        sh build.sh ios-dynamic
-        cd build/ios
-        zip --symlinks -r realm-framework-ios.zip Realm.framework
-        ;;
+    "package")
+        PLATFORM="$2"
+        REALM_SWIFT_VERSION=
 
-    "package-osx")
-        sh build.sh osx
-
-        cd build/DerivedData/Realm/Build/Products/Release
-        zip --symlinks -r realm-framework-osx.zip Realm.framework
-        ;;
-
-    "package-watchos")
-        sh build.sh prelaunch-simulator
-        sh build.sh watchos
-
-        # If we're building the obj-c library with an Xcode version older than
-        # 10, we need to also build the arm64_32 slice with Xcode 10 and lipo
-        # it in
-        if (( $(xcode_version_major) < 10 )); then
-            (
-                REALM_XCODE_VERSION=10.0
-                REALM_SWIFT_VERSION=
-                set_xcode_and_swift_versions
-                sh build.sh prelaunch-simulator
-                xc "-scheme Realm -configuration $CONFIGURATION -sdk watchos ARCHS='arm64_32'"
-                cp build/DerivedData/Realm/Build/Products/Release-watchos/Realm.framework/*.bcsymbolmap build/watchos/Realm.framework
-                xcrun lipo \
-                  -create build/watchos/Realm.framework/Realm build/DerivedData/Realm/Build/Products/Release-watchos/Realm.framework/Realm \
-                  -output build/watchos-tmp
-                mv build/watchos-tmp build/watchos/Realm.framework/Realm
-            )
-        fi
-
-        cd build/watchos
-        zip --symlinks -r realm-framework-watchos.zip Realm.framework
-        ;;
-
-    "package-tvos")
-        sh build.sh prelaunch-simulator
-        sh build.sh tvos
-
-        cd build/tvos
-        zip --symlinks -r realm-framework-tvos.zip Realm.framework
-        ;;
+        set_xcode_and_swift_versions
 
-    package-*-swift)
-        PLATFORM=$(echo $COMMAND | cut -d - -f 2)
-        for version in 9.2 9.3 9.4 10.0 10.1; do
-            REALM_XCODE_VERSION=$version
-            REALM_SWIFT_VERSION=
-            set_xcode_and_swift_versions
+        if [[ "$PLATFORM" = "catalyst" ]] && (( $(xcode_version_major) < 11 )); then
+            mkdir -p build/catalyst/swift-$REALM_XCODE_VERSION
+        else
             sh build.sh prelaunch-simulator
             sh build.sh $PLATFORM-swift
-        done
-
-        cd build/$PLATFORM
-        ln -s swift-4.0.3 swift-3.2.3
-        ln -s swift-4.1 swift-3.3
-        ln -s swift-4.1.2 swift-3.3.2
-        ln -s swift-4.2 swift-3.4
-        ln -s swift-4.2.1 swift-3.4.1
-        zip --symlinks -r realm-swift-framework-$PLATFORM.zip swift-3.2.3 swift-3.3 swift-3.3.2 swift-3.4 swift-3.4.1 swift-4.0.3 swift-4.1 swift-4.1.2 swift-4.2 swift-4.2.1
-        ;;
-
-    package-*-swift-3.2.3)
-        PLATFORM=$(echo $COMMAND | cut -d - -f 2)
-        mkdir -p build/$PLATFORM
-        cd build/$PLATFORM
-        ln -s swift-4.0.2 swift-3.2.3
-        zip --symlinks -r realm-swift-framework-$PLATFORM-swift-3.2.3.zip swift-3.2.3
-        ;;
-
-    package-*-swift-3.3)
-        PLATFORM=$(echo $COMMAND | cut -d - -f 2)
-        mkdir -p build/$PLATFORM
-        cd build/$PLATFORM
-        ln -s swift-4.1 swift-3.3
-        zip --symlinks -r realm-swift-framework-$PLATFORM-swift-3.3.zip swift-3.3
-        ;;
-
-    package-*-swift-3.3.2)
-        PLATFORM=$(echo $COMMAND | cut -d - -f 2)
-        mkdir -p build/$PLATFORM
-        cd build/$PLATFORM
-        ln -s swift-4.1.2 swift-3.3.2
-        zip --symlinks -r realm-swift-framework-$PLATFORM-swift-3.3.2.zip swift-3.3.2
-        ;;
-
-    package-*-swift-3.4)
-        PLATFORM=$(echo $COMMAND | cut -d - -f 2)
-        mkdir -p build/$PLATFORM
-        cd build/$PLATFORM
-        ln -s swift-4.2 swift-3.4
-        zip --symlinks -r realm-swift-framework-$PLATFORM-swift-3.4.zip swift-3.4
-        ;;
-
-    package-*-swift-3.4.1)
-        PLATFORM=$(echo $COMMAND | cut -d - -f 2)
-        mkdir -p build/$PLATFORM
-        cd build/$PLATFORM
-        ln -s swift-4.2.1 swift-3.4.1
-        zip --symlinks -r realm-swift-framework-$PLATFORM-swift-3.4.1.zip swift-3.4.1
-        ;;
-
-    package-*-swift-*)
-        PLATFORM=$(echo $COMMAND | cut -d - -f 2)
-        REALM_SWIFT_VERSION=$(echo $COMMAND | cut -d - -f 4)
-        REALM_XCODE_VERSION=
-
-        set_xcode_and_swift_versions
-        sh build.sh prelaunch-simulator
-        sh build.sh $PLATFORM-swift
+        fi
 
         cd build/$PLATFORM
-        zip --symlinks -r realm-swift-framework-$PLATFORM-swift-$REALM_SWIFT_VERSION.zip swift-$REALM_SWIFT_VERSION
+        zip --symlinks -r realm-framework-$PLATFORM-$REALM_XCODE_VERSION.zip swift-$REALM_XCODE_VERSION
         ;;
 
     "package-release")
@@ -1278,58 +1378,20 @@ EOM
             mkdir -p ${FOLDER}/ios/dynamic
             mkdir -p ${FOLDER}/Swift
 
-            (
-                cd ${FOLDER}/osx
-                unzip ${WORKSPACE}/realm-framework-osx.zip
-            )
-
-            (
-                cd ${FOLDER}/ios/static
-                unzip ${WORKSPACE}/realm-framework-ios-static.zip
-            )
-
-            (
-                cd ${FOLDER}/ios/dynamic
-                unzip ${WORKSPACE}/realm-framework-ios.zip
-            )
+            unzip ${WORKSPACE}/realm-framework-ios-static.zip -d ${FOLDER}/ios/static
+            for platform in osx ios watchos tvos catalyst; do
+                unzip ${WORKSPACE}/realm-framework-${platform}-${REALM_XCODE_VERSION}.zip -d ${FOLDER}/${platform}
+                mv ${FOLDER}/${platform}/swift-*/Realm.framework ${FOLDER}/${platform}
+                rm -r ${FOLDER}/${platform}/swift-*
+            done
 
-            (
-                cd ${FOLDER}/watchos
-                unzip ${WORKSPACE}/realm-framework-watchos.zip
-            )
-
-            (
-                cd ${FOLDER}/tvos
-                unzip ${WORKSPACE}/realm-framework-tvos.zip
-            )
+            mv ${FOLDER}/ios/Realm.framework ${FOLDER}/ios/dynamic
         else
-            (
-                cd ${FOLDER}/osx
-                for f in ${WORKSPACE}/realm-swift-framework-osx-swift-*.zip; do
-                    unzip "$f"
-                done
-            )
-
-            (
-                cd ${FOLDER}/ios
-                for f in ${WORKSPACE}/realm-swift-framework-ios-swift-*.zip; do
-                    unzip "$f"
-                done
-            )
-
-            (
-                cd ${FOLDER}/watchos
-                for f in ${WORKSPACE}/realm-swift-framework-watchos-swift-*.zip; do
-                    unzip "$f"
-                done
-            )
-
-            (
-                cd ${FOLDER}/tvos
-                for f in ${WORKSPACE}/realm-swift-framework-tvos-swift-*.zip; do
-                    unzip "$f"
-                done
-            )
+            for platform in osx ios watchos tvos catalyst; do
+                find ${WORKSPACE} -name "realm-framework-$platform-*.zip" \
+                                  -maxdepth 1 \
+                                  -exec unzip {} -d ${FOLDER}/${platform} \;
+            done
         fi
 
         (
@@ -1392,40 +1454,37 @@ EOF
 
         echo 'Packaging iOS'
         sh build.sh package-ios-static
-        cp build/ios-static/realm-framework-ios-static.zip ..
-        sh build.sh package-ios
-        cp build/ios/realm-framework-ios.zip ..
-        sh build.sh package-ios-swift
-        cp build/ios/realm-swift-framework-ios.zip ..
-
-        echo 'Packaging OS X'
-        sh build.sh package-osx
-        cp build/DerivedData/Realm/Build/Products/Release/realm-framework-osx.zip ..
-        sh build.sh package-osx-swift
-        cp build/osx/realm-swift-framework-osx.zip ..
+        cp build/ios-static/realm-framework-ios-static.zip .
+        sh build.sh package ios
+        cp build/ios/realm-framework-ios-$REALM_XCODE_VERSION.zip .
+
+        echo 'Packaging macOS'
+        sh build.sh package osx
+        cp build/osx/realm-framework-osx-$REALM_XCODE_VERSION.zip .
 
         echo 'Packaging watchOS'
-        sh build.sh package-watchos
-        cp build/watchos/realm-framework-watchos.zip ..
-        sh build.sh package-watchos-swift
-        cp build/watchos/realm-swift-framework-watchos.zip ..
+        sh build.sh package watchos
+        cp build/watchos/realm-framework-watchos-$REALM_XCODE_VERSION.zip .
 
         echo 'Packaging tvOS'
-        sh build.sh package-tvos
-        cp build/tvos/realm-framework-tvos.zip ..
-        sh build.sh package-tvos-swift
-        cp build/tvos/realm-swift-framework-tvos.zip ..
+        sh build.sh package tvos
+        cp build/tvos/realm-framework-tvos-$REALM_XCODE_VERSION.zip .
+
+        echo 'Packaging Catalyst'
+        sh build.sh package catalyst
+        cp build/catalyst/realm-framework-catalyst-$REALM_XCODE_VERSION.zip .
 
         echo 'Packaging examples'
         sh build.sh package-examples
-        cp realm-examples.zip ..
 
         echo 'Building final release packages'
+        export WORKSPACE="${WORKSPACE}/realm-cocoa"
         sh build.sh package-release objc
         sh build.sh package-release swift
 
         echo 'Testing packaged examples'
-        sh build.sh package-test-examples
+        sh build.sh package-test-examples-objc
+        sh build.sh package-test-examples-swift
         ;;
 
     "github-release")
@@ -1451,8 +1510,14 @@ x.y.z Release notes (yyyy-MM-dd)
 
 ### Compatibility
 * File format: Generates Realms with format v9 (Reads and upgrades all previous formats)
-* Realm Object Server: 3.11.0 or later.
-* APIs are backwards compatible with all previous releases in the 3.x.y series.
+* Realm Object Server: 3.21.0 or later.
+* APIs are backwards compatible with all previous releases in the 4.x.y series.
+* Carthage release for Swift is built with Xcode 11.3.
+
+### Internal
+Upgraded realm-core from ? to ?
+Upgraded realm-sync from ? to ?
+
 EOS)
         changelog=$(cat CHANGELOG.md)
         echo "$empty_section" > CHANGELOG.md
diff --git a/Pods/Realm/core/librealmcore-macosx.a b/Pods/Realm/core/librealmcore-macosx.a
index 8ad7088..9969226 100644
Binary files a/Pods/Realm/core/librealmcore-macosx.a and b/Pods/Realm/core/librealmcore-macosx.a differ
diff --git a/Pods/Realm/include/RLMAccessor.h b/Pods/Realm/include/RLMAccessor.h
index 59c625a..bcf5dfb 100644
--- a/Pods/Realm/include/RLMAccessor.h
+++ b/Pods/Realm/include/RLMAccessor.h
@@ -35,7 +35,7 @@ Class RLMUnmanagedAccessorClassForObjectClass(Class objectClass, RLMObjectSchema
 //
 FOUNDATION_EXTERN void RLMDynamicValidatedSet(RLMObjectBase *obj, NSString *propName, id __nullable val);
 FOUNDATION_EXTERN id __nullable RLMDynamicGet(RLMObjectBase *obj, RLMProperty *prop);
-FOUNDATION_EXTERN id __nullable RLMDynamicGetByName(RLMObjectBase *obj, NSString *propName, bool asList);
+FOUNDATION_EXTERN id __nullable RLMDynamicGetByName(RLMObjectBase *obj, NSString *propName);
 
 // by property/column
 void RLMDynamicSet(RLMObjectBase *obj, RLMProperty *prop, id val);
diff --git a/Pods/Realm/include/RLMAccessor.hpp b/Pods/Realm/include/RLMAccessor.hpp
index 785dd40..88884e2 100644
--- a/Pods/Realm/include/RLMAccessor.hpp
+++ b/Pods/Realm/include/RLMAccessor.hpp
@@ -72,13 +72,14 @@ class RLMAccessorContext {
 
     template<typename Func>
     void enumerate_list(__unsafe_unretained const id v, Func&& func) {
-        for (id value in v) {
+        id enumerable = RLMAsFastEnumeration(v) ?: v;
+        for (id value in enumerable) {
             func(value);
         }
     }
 
     template<typename T>
-    T unbox(id v, bool create = false, bool update = false, bool = false, size_t = 0);
+    T unbox(id v, realm::CreatePolicy = realm::CreatePolicy::Skip, size_t = 0);
 
     bool is_null(id v) { return v == NSNull.null; }
     id null_value() { return NSNull.null; }
@@ -89,7 +90,7 @@ class RLMAccessorContext {
 
     // Internal API
     RLMAccessorContext(RLMObjectBase *parentObject, const realm::Property *property = nullptr);
-    RLMAccessorContext(RLMRealm *realm, RLMClassInfo& info, bool promote=true);
+    RLMAccessorContext(RLMClassInfo& info, bool promote=true);
 
     // The property currently being accessed; needed for KVO things for boxing
     // List and Results
diff --git a/Pods/Realm/include/RLMArray_Private.hpp b/Pods/Realm/include/RLMArray_Private.hpp
index 08a4487..9626a16 100644
--- a/Pods/Realm/include/RLMArray_Private.hpp
+++ b/Pods/Realm/include/RLMArray_Private.hpp
@@ -48,7 +48,6 @@ class RLMObservationInfo;
 @interface RLMManagedArray : RLMArray <RLMFastEnumerable>
 - (instancetype)initWithParent:(RLMObjectBase *)parentObject property:(RLMProperty *)property;
 - (RLMManagedArray *)initWithList:(realm::List)list
-                            realm:(__unsafe_unretained RLMRealm *const)realm
                        parentInfo:(RLMClassInfo *)parentInfo
                          property:(__unsafe_unretained RLMProperty *const)property;
 
diff --git a/Pods/Realm/include/RLMCollection.h b/Pods/Realm/include/RLMCollection.h
index 9d3fa7e..8d8ca49 100644
--- a/Pods/Realm/include/RLMCollection.h
+++ b/Pods/Realm/include/RLMCollection.h
@@ -18,12 +18,13 @@
 
 #import <Foundation/Foundation.h>
 
+#import <Realm/RLMConstants.h>
 #import <Realm/RLMThreadSafeReference.h>
 
 NS_ASSUME_NONNULL_BEGIN
 
 @class RLMRealm, RLMResults, RLMSortDescriptor, RLMNotificationToken, RLMCollectionChange;
-typedef NS_ENUM(int32_t, RLMPropertyType);
+typedef RLM_CLOSED_ENUM(int32_t, RLMPropertyType);
 
 /**
  A homogenous collection of Realm-managed objects. Examples of conforming types
diff --git a/Pods/Realm/include/RLMCollection_Private.h b/Pods/Realm/include/RLMCollection_Private.h
index 4c3f882..eec5aea 100644
--- a/Pods/Realm/include/RLMCollection_Private.h
+++ b/Pods/Realm/include/RLMCollection_Private.h
@@ -22,5 +22,10 @@
 
 @protocol RLMFastEnumerable;
 
-void RLMCollectionSetValueForKey(id<RLMFastEnumerable> collection, NSString *key, id value);
+NS_ASSUME_NONNULL_BEGIN
+
+void RLMCollectionSetValueForKey(id<RLMFastEnumerable> collection, NSString *key, id _Nullable value);
 FOUNDATION_EXTERN NSString *RLMDescriptionWithMaxDepth(NSString *name, id<RLMCollection> collection, NSUInteger depth);
+FOUNDATION_EXTERN id _Nullable (*_Nullable RLMSwiftAsFastEnumeration)(id);
+
+NS_ASSUME_NONNULL_END
diff --git a/Pods/Realm/include/RLMCollection_Private.hpp b/Pods/Realm/include/RLMCollection_Private.hpp
index 908c886..2d13016 100644
--- a/Pods/Realm/include/RLMCollection_Private.hpp
+++ b/Pods/Realm/include/RLMCollection_Private.hpp
@@ -45,11 +45,9 @@ class RLMClassInfo;
 @interface RLMFastEnumerator : NSObject
 - (instancetype)initWithList:(realm::List&)list
                   collection:(id)collection
-                       realm:(RLMRealm *)realm
                    classInfo:(RLMClassInfo&)info;
 - (instancetype)initWithResults:(realm::Results&)results
                      collection:(id)collection
-                          realm:(RLMRealm *)realm
                       classInfo:(RLMClassInfo&)info;
 
 // Detach this enumerator from the source collection. Must be called before the
@@ -81,7 +79,6 @@ RLMNotificationToken *RLMAddNotificationBlock(id objcCollection,
                                               bool suppressInitialChange=false);
 
 template<typename Collection>
-NSArray *RLMCollectionValueForKey(Collection& collection, NSString *key,
-                                  RLMRealm *realm, RLMClassInfo& info);
+NSArray *RLMCollectionValueForKey(Collection& collection, NSString *key, RLMClassInfo& info);
 
 std::vector<std::pair<std::string, bool>> RLMSortDescriptorsToKeypathArray(NSArray<RLMSortDescriptor *> *properties);
diff --git a/Pods/Realm/include/RLMConstants.h b/Pods/Realm/include/RLMConstants.h
index f73fe83..c4c1093 100644
--- a/Pods/Realm/include/RLMConstants.h
+++ b/Pods/Realm/include/RLMConstants.h
@@ -29,6 +29,15 @@ NS_ASSUME_NONNULL_BEGIN
 #define RLM_EXTENSIBLE_STRING_ENUM_CASE_SWIFT_NAME(fully_qualified, _) NS_SWIFT_NAME(fully_qualified)
 #endif
 
+// Swift 5 considers NS_ENUM to be "open", meaning there could be values present
+// other than the defined cases (which allows adding more cases later without
+// it being a breaking change), while older versions consider it "closed".
+#ifdef NS_CLOSED_ENUM
+#define RLM_CLOSED_ENUM NS_CLOSED_ENUM
+#else
+#define RLM_CLOSED_ENUM NS_ENUM
+#endif
+
 #if __has_attribute(ns_error_domain) && (!defined(__cplusplus) || !__cplusplus || __cplusplus >= 201103L)
 #define RLM_ERROR_ENUM(type, name, domain) \
     _Pragma("clang diagnostic push") \
@@ -47,7 +56,7 @@ NS_ASSUME_NONNULL_BEGIN
 
  For more information, see [Realm Models](https://realm.io/docs/objc/latest/#models).
  */
-typedef NS_ENUM(int32_t, RLMPropertyType) {
+typedef RLM_CLOSED_ENUM(int32_t, RLMPropertyType) {
 
 #pragma mark - Primitive types
 
@@ -152,6 +161,10 @@ typedef RLM_ERROR_ENUM(NSInteger, RLMError, RLMErrorDomain) {
      If you wish to migrate any data from the backup Realm, you can open it using the provided Realm configuration.
      */
     RLMErrorIncompatibleSyncedFile = 11,
+    /**
+     Denotates an error where an operation was requested which cannot be performed on an open file.
+     */
+    RLMErrorAlreadyOpen = 12,
 };
 
 #pragma mark - Constants
@@ -164,12 +177,15 @@ typedef RLM_ERROR_ENUM(NSInteger, RLMError, RLMErrorDomain) {
 typedef NSString * RLMNotification RLM_EXTENSIBLE_STRING_ENUM;
 
 /**
- This notification is posted by a Realm when the data in that Realm has changed.
+ This notification is posted when a write transaction has been committed to a Realm on a different thread for
+ the same file.
+
+ It is not posted if `autorefresh` is enabled, or if the Realm is refreshed before the notification has a chance
+ to run.
 
- More specifically, this notification is posted after a Realm has been refreshed to
- reflect a write transaction. This can happen when an autorefresh occurs, when
- `-[RLMRealm refresh]` is called, after an implicit refresh from `-[RLMRealm beginWriteTransaction]`,
- or after a local write transaction is completed.
+ Realms with autorefresh disabled should normally install a handler for this notification which calls
+ `-[RLMRealm refresh]` after doing some work. Refreshing the Realm is optional, but not refreshing the Realm may lead to
+ large Realm files. This is because an extra copy of the data must be kept for the stale Realm.
  */
 extern RLMNotification const RLMRealmRefreshRequiredNotification
 RLM_EXTENSIBLE_STRING_ENUM_CASE_SWIFT_NAME(RLMRealmRefreshRequiredNotification, RefreshRequired);
diff --git a/Pods/Realm/include/RLMJSONModels.h b/Pods/Realm/include/RLMJSONModels.h
index 9cc650b..82b8555 100644
--- a/Pods/Realm/include/RLMJSONModels.h
+++ b/Pods/Realm/include/RLMJSONModels.h
@@ -45,7 +45,6 @@ NS_ASSUME_NONNULL_BEGIN
 @property (nonatomic, nullable, readonly) NSString *path;
 @property (nonatomic, readonly) NSTimeInterval expires;
 @property (nonatomic, readonly) BOOL isAdmin;
-//@property (nonatomic, readonly) NSArray *access;
 
 - (instancetype)initWithDictionary:(NSDictionary *)jsonDictionary;
 
@@ -67,6 +66,7 @@ NS_ASSUME_NONNULL_BEGIN
 
 @property (nonatomic, readonly, nullable) RLMTokenModel *accessToken;
 @property (nonatomic, readonly, nullable) RLMTokenModel *refreshToken;
+@property (nonatomic, readonly, nullable) NSString *urlPrefix;
 
 - (instancetype)initWithDictionary:(NSDictionary *)jsonDictionary
                 requireAccessToken:(BOOL)requireAccessToken
diff --git a/Pods/Realm/include/RLMListBase.h b/Pods/Realm/include/RLMListBase.h
index 0151cfb..7ed1988 100644
--- a/Pods/Realm/include/RLMListBase.h
+++ b/Pods/Realm/include/RLMListBase.h
@@ -18,7 +18,7 @@
 
 #import <Foundation/Foundation.h>
 
-@class RLMArray;
+@class RLMArray, RLMObjectBase, RLMResults, RLMProperty;
 
 NS_ASSUME_NONNULL_BEGIN
 
@@ -27,7 +27,16 @@ NS_ASSUME_NONNULL_BEGIN
 @interface RLMListBase : NSObject <NSFastEnumeration>
 @property (nonatomic, strong) RLMArray *_rlmArray;
 
+- (instancetype)init;
 - (instancetype)initWithArray:(RLMArray *)array;
 @end
 
+@interface RLMLinkingObjectsHandle : NSObject
+- (instancetype)initWithObject:(RLMObjectBase *)object property:(RLMProperty *)property;
+
+@property (nonatomic, readonly) RLMResults *results;
+@property (nonatomic, readonly) RLMObjectBase *parent;
+@property (nonatomic, readonly) RLMProperty *property;
+@end
+
 NS_ASSUME_NONNULL_END
diff --git a/Pods/Realm/include/RLMNetworkClient.h b/Pods/Realm/include/RLMNetworkClient.h
index 4e2a3ce..7f86ff2 100644
--- a/Pods/Realm/include/RLMNetworkClient.h
+++ b/Pods/Realm/include/RLMNetworkClient.h
@@ -30,44 +30,36 @@ NS_ASSUME_NONNULL_BEGIN
 
 /// An abstract class representing a server endpoint.
 @interface RLMSyncServerEndpoint : NSObject RLM_SYNC_UNINITIALIZABLE
-+ (instancetype)endpoint;
-
 + (void)sendRequestToServer:(NSURL *)serverURL
                        JSON:(NSDictionary *)jsonDictionary
-                    options:(nullable RLMNetworkRequestOptions *)options
                  completion:(void (^)(NSError *))completionBlock;
+
++ (void)sendRequestToServer:(NSURL *)serverURL
+                       JSON:(NSDictionary *)jsonDictionary
+                    timeout:(NSTimeInterval)timeout
+                 completion:(void (^)(NSError *, NSDictionary *))completionBlock;
 @end
 
-/// The authentication endpoint.
 @interface RLMSyncAuthEndpoint : RLMSyncServerEndpoint RLM_SYNC_UNINITIALIZABLE
 @end
-
-/// The password change endpoint.
 @interface RLMSyncChangePasswordEndpoint : RLMSyncServerEndpoint RLM_SYNC_UNINITIALIZABLE
 @end
-
 @interface RLMSyncUpdateAccountEndpoint : RLMSyncServerEndpoint RLM_SYNC_UNINITIALIZABLE
 @end
-
-/// The get user info endpoint.
 @interface RLMSyncGetUserInfoEndpoint : RLMSyncServerEndpoint RLM_SYNC_UNINITIALIZABLE
 @end
 
-/**
- A simple Realm Object Server network client that wraps `NSURLSession`.
- */
-@interface RLMNetworkClient : NSObject
-
-// Set the timeout in seconds for requests which do not take an explicit timeout.
-+ (void)setDefaultTimeout:(NSTimeInterval)timeout;
-
-+ (void)sendRequestToEndpoint:(RLMSyncServerEndpoint *)endpoint
-                       server:(NSURL *)serverURL
-                         JSON:(NSDictionary *)jsonDictionary
-                      timeout:(NSTimeInterval)timeout
-                      options:(nullable RLMNetworkRequestOptions *)options
-                   completion:(RLMSyncCompletionBlock)completionBlock;
+@interface RLMSyncGetPermissionsEndpoint : RLMSyncServerEndpoint RLM_SYNC_UNINITIALIZABLE
+@end
+@interface RLMSyncGetPermissionOffersEndpoint : RLMSyncServerEndpoint RLM_SYNC_UNINITIALIZABLE
+@end
+@interface RLMSyncApplyPermissionsEndpoint : RLMSyncServerEndpoint RLM_SYNC_UNINITIALIZABLE
+@end
+@interface RLMSyncOfferPermissionsEndpoint : RLMSyncServerEndpoint RLM_SYNC_UNINITIALIZABLE
+@end
+@interface RLMSyncAcceptPermissionOfferEndpoint : RLMSyncServerEndpoint RLM_SYNC_UNINITIALIZABLE
+@end
+@interface RLMSyncInvalidatePermissionOfferEndpoint : RLMSyncServerEndpoint RLM_SYNC_UNINITIALIZABLE
+@end
 
 NS_ASSUME_NONNULL_END
-
-@end
diff --git a/Pods/Realm/include/RLMObject.h b/Pods/Realm/include/RLMObject.h
index 2b55a3e..23d99e5 100644
--- a/Pods/Realm/include/RLMObject.h
+++ b/Pods/Realm/include/RLMObject.h
@@ -117,7 +117,7 @@ NS_ASSUME_NONNULL_BEGIN
 
  @see `[RLMRealm addObject:]`
  */
-- (instancetype)initWithValue:(id)value NS_DESIGNATED_INITIALIZER;
+- (instancetype)initWithValue:(id)value;
 
 
 /**
@@ -194,10 +194,13 @@ NS_ASSUME_NONNULL_BEGIN
  argument's type is the same as the receiver, and the objects have identical values for
  their managed properties, this method does nothing.
 
- If the object is being updated, all properties defined in its schema will be set by copying from
+ If the object is being updated, each property defined in its schema will be set by copying from
  `value` using key-value coding. If the `value` argument does not respond to `valueForKey:` for a
  given property name (or getter name, if defined), that value will remain untouched.
  Nullable properties on the object can be set to nil by using `NSNull` as the updated value.
+ Each property is set even if the existing value is the same as the new value being set, and
+ notifications will report them all being changed. See `createOrUpdateModifiedInDefaultRealmWithValue:`
+ for a version of this function which only sets the values which have changed.
 
  If the `value` argument is an array, all properties must be present, valid and in the same
  order as the properties defined in the model.
@@ -208,6 +211,50 @@ NS_ASSUME_NONNULL_BEGIN
  */
 + (instancetype)createOrUpdateInDefaultRealmWithValue:(id)value;
 
+/**
+ Creates or updates a Realm object within the default Realm.
+
+ This method may only be called on Realm object types with a primary key defined. If there is already
+ an object with the same primary key value in the default Realm, its values are updated and the object
+ is returned. Otherwise, this method creates and populates a new instance of the object in the default Realm.
+
+ If nested objects are included in the argument, `createOrUpdateModifiedInDefaultRealmWithValue:` will be
+ recursively called on them if they have primary keys, `createInDefaultRealmWithValue:` if they do not.
+
+ The `value` argument is used to populate the object. It can be a Realm object, a key-value coding
+ compliant object, an array or dictionary returned from the methods in `NSJSONSerialization`, or an
+ array containing one element for each managed property.
+
+ If the object is being created, an exception will be thrown if any required properties
+ are not present and those properties were not defined with default values.
+
+ If the `value` argument is a Realm object already managed by the default Realm, the
+ argument's type is the same as the receiver, and the objects have identical values for
+ their managed properties, this method does nothing.
+
+ If the object is being updated, each property defined in its schema will be set by copying from
+ `value` using key-value coding. If the `value` argument does not respond to `valueForKey:` for a
+ given property name (or getter name, if defined), that value will remain untouched.
+ Nullable properties on the object can be set to nil by using `NSNull` as the updated value.
+ Unlike `createOrUpdateInDefaultRealmWithValue:`, only properties which have changed in value are
+ set, and any change notifications produced by this call will report only which properies have
+ actually changed.
+
+ Checking which properties have changed imposes a small amount of overhead, and so this method
+ may be slower when all or nearly all of the properties being set have changed. If most or all
+ of the properties being set have not changed, this method will be much faster than unconditionally
+ setting all of them, and will also reduce how much data has to be written to the Realm, saving
+ both i/o time and disk space.
+
+ If the `value` argument is an array, all properties must be present, valid and in the same
+ order as the properties defined in the model.
+
+ @param value    The value used to populate the object.
+
+ @see   `defaultPropertyValues`, `primaryKey`
+ */
++ (instancetype)createOrUpdateModifiedInDefaultRealmWithValue:(id)value;
+
 /**
  Creates or updates an Realm object within a specified Realm.
 
@@ -229,10 +276,13 @@ NS_ASSUME_NONNULL_BEGIN
  argument's type is the same as the receiver, and the objects have identical values for
  their managed properties, this method does nothing.
 
- If the object is being updated, all properties defined in its schema will be set by copying from
+ If the object is being updated, each property defined in its schema will be set by copying from
  `value` using key-value coding. If the `value` argument does not respond to `valueForKey:` for a
  given property name (or getter name, if defined), that value will remain untouched.
  Nullable properties on the object can be set to nil by using `NSNull` as the updated value.
+ Each property is set even if the existing value is the same as the new value being set, and
+ notifications will report them all being changed. See `createOrUpdateModifiedInRealm:withValue:`
+ for a version of this function which only sets the values which have changed.
 
  If the `value` argument is an array, all properties must be present, valid and in the same
  order as the properties defined in the model.
@@ -244,6 +294,51 @@ NS_ASSUME_NONNULL_BEGIN
  */
 + (instancetype)createOrUpdateInRealm:(RLMRealm *)realm withValue:(id)value;
 
+/**
+ Creates or updates an Realm object within a specified Realm.
+
+ This method may only be called on Realm object types with a primary key defined. If there is already
+ an object with the same primary key value in the given Realm, its values are updated and the object
+ is returned. Otherwise this method creates and populates a new instance of this object in the given Realm.
+
+ If nested objects are included in the argument, `createOrUpdateInRealm:withValue:` will be
+ recursively called on them if they have primary keys, `createInRealm:withValue:` if they do not.
+
+ The `value` argument is used to populate the object. It can be a Realm object, a key-value coding
+ compliant object, an array or dictionary returned from the methods in `NSJSONSerialization`, or an
+ array containing one element for each managed property.
+
+ If the object is being created, an exception will be thrown if any required properties
+ are not present and those properties were not defined with default values.
+
+ If the `value` argument is a Realm object already managed by the given Realm, the
+ argument's type is the same as the receiver, and the objects have identical values for
+ their managed properties, this method does nothing.
+
+ If the object is being updated, each property defined in its schema will be set by copying from
+ `value` using key-value coding. If the `value` argument does not respond to `valueForKey:` for a
+ given property name (or getter name, if defined), that value will remain untouched.
+ Nullable properties on the object can be set to nil by using `NSNull` as the updated value.
+ Unlike `createOrUpdateInRealm:withValue:`, only properties which have changed in value are
+ set, and any change notifications produced by this call will report only which properies have
+ actually changed.
+
+ Checking which properties have changed imposes a small amount of overhead, and so this method
+ may be slower when all or nearly all of the properties being set have changed. If most or all
+ of the properties being set have not changed, this method will be much faster than unconditionally
+ setting all of them, and will also reduce how much data has to be written to the Realm, saving
+ both i/o time and disk space.
+
+ If the `value` argument is an array, all properties must be present, valid and in the same
+ order as the properties defined in the model.
+
+ @param realm    The Realm which should own the object.
+ @param value    The value used to populate the object.
+
+ @see   `defaultPropertyValues`, `primaryKey`
+ */
++ (instancetype)createOrUpdateModifiedInRealm:(RLMRealm *)realm withValue:(id)value;
+
 #pragma mark - Properties
 
 /**
diff --git a/Pods/Realm/include/RLMObjectBase_Private.h b/Pods/Realm/include/RLMObjectBase_Private.h
index c2d0722..74a54f1 100644
--- a/Pods/Realm/include/RLMObjectBase_Private.h
+++ b/Pods/Realm/include/RLMObjectBase_Private.h
@@ -18,6 +18,8 @@
 
 #import <Realm/RLMObjectBase.h>
 
+@class RLMArray<RLMObjectType>;
+
 NS_ASSUME_NONNULL_BEGIN
 
 // RLMObjectBase private
diff --git a/Pods/Realm/include/RLMObjectSchema_Private.hpp b/Pods/Realm/include/RLMObjectSchema_Private.hpp
index 7ccf177..cb00dc8 100644
--- a/Pods/Realm/include/RLMObjectSchema_Private.hpp
+++ b/Pods/Realm/include/RLMObjectSchema_Private.hpp
@@ -30,7 +30,3 @@ namespace realm {
 // initialize with realm::ObjectSchema
 + (instancetype)objectSchemaForObjectStoreSchema:(realm::ObjectSchema const&)objectSchema;
 @end
-
-// An objc_ivar pointer which is guaranteed to not point to any actually-existing
-// ivar. Used as part of https://github.com/realm/realm-cocoa/issues/5784
-extern const Ivar RLMDummySwiftIvar;
diff --git a/Pods/Realm/include/RLMObjectStore.h b/Pods/Realm/include/RLMObjectStore.h
index b44e7e6..fb431d7 100644
--- a/Pods/Realm/include/RLMObjectStore.h
+++ b/Pods/Realm/include/RLMObjectStore.h
@@ -24,8 +24,16 @@ extern "C" {
 
 @class RLMRealm, RLMSchema, RLMObjectBase, RLMResults, RLMProperty;
 
+typedef NS_ENUM(NSUInteger, RLMUpdatePolicy) {
+    RLMUpdatePolicyError = 1,
+    RLMUpdatePolicyUpdateChanged = 3,
+    RLMUpdatePolicyUpdateAll = 2,
+};
+
 NS_ASSUME_NONNULL_BEGIN
 
+void RLMVerifyHasPrimaryKey(Class cls);
+
 //
 // Accessor Creation
 //
@@ -39,7 +47,7 @@ void RLMRealmCreateAccessors(RLMSchema *schema);
 //
 
 // add an object to the given realm
-void RLMAddObjectToRealm(RLMObjectBase *object, RLMRealm *realm, bool createOrUpdate);
+void RLMAddObjectToRealm(RLMObjectBase *object, RLMRealm *realm, RLMUpdatePolicy);
 
 // delete an object from its realm
 void RLMDeleteObjectFromRealm(RLMObjectBase *object, RLMRealm *realm);
@@ -56,10 +64,9 @@ id _Nullable RLMGetObject(RLMRealm *realm, NSString *objectClassName, id _Nullab
 
 // create object from array or dictionary
 RLMObjectBase *RLMCreateObjectInRealmWithValue(RLMRealm *realm, NSString *className,
-                                               id _Nullable value, bool createOrUpdate)
+                                               id _Nullable value, RLMUpdatePolicy updatePolicy)
 NS_RETURNS_RETAINED;
 
-
 //
 // Accessor Creation
 //
@@ -79,10 +86,8 @@ namespace realm {
 class RLMClassInfo;
 
 // Create accessors
-RLMObjectBase *RLMCreateObjectAccessor(RLMRealm *realm, RLMClassInfo& info,
-                                       NSUInteger index) NS_RETURNS_RETAINED;
-RLMObjectBase *RLMCreateObjectAccessor(RLMRealm *realm, RLMClassInfo& info,
-                                       realm::RowExpr row) NS_RETURNS_RETAINED;
+RLMObjectBase *RLMCreateObjectAccessor(RLMClassInfo& info, NSUInteger index) NS_RETURNS_RETAINED;
+RLMObjectBase *RLMCreateObjectAccessor(RLMClassInfo& info, realm::RowExpr row) NS_RETURNS_RETAINED;
 #endif
 
 NS_ASSUME_NONNULL_END
diff --git a/Pods/Realm/include/RLMObject_Private.h b/Pods/Realm/include/RLMObject_Private.h
index 33a13ae..430051a 100644
--- a/Pods/Realm/include/RLMObject_Private.h
+++ b/Pods/Realm/include/RLMObject_Private.h
@@ -20,9 +20,11 @@
 
 NS_ASSUME_NONNULL_BEGIN
 
-@class RLMProperty, RLMArray, RLMSwiftPropertyMetadata;
+@class RLMProperty, RLMArray;
 typedef NS_ENUM(int32_t, RLMPropertyType);
 
+FOUNDATION_EXTERN void RLMInitializeWithValue(RLMObjectBase *, id, RLMSchema *);
+
 // RLMObject accessor and read/write realm
 @interface RLMObjectBase () {
 @public
@@ -30,29 +32,11 @@ typedef NS_ENUM(int32_t, RLMPropertyType);
     __unsafe_unretained RLMObjectSchema *_objectSchema;
 }
 
-// unmanaged initializer
-- (instancetype)initWithValue:(id)value schema:(RLMSchema *)schema NS_DESIGNATED_INITIALIZER;
-
-// live accessor initializer
-- (instancetype)initWithRealm:(__unsafe_unretained RLMRealm *const)realm
-                       schema:(RLMObjectSchema *)schema NS_DESIGNATED_INITIALIZER;
-
 // shared schema for this class
 + (nullable RLMObjectSchema *)sharedSchema;
 
-// provide injection point for alternative Swift object util class
-+ (Class)objectUtilClass:(BOOL)isSwift;
-
-@end
-
-@interface RLMObject ()
-
-// unmanaged initializer
-- (instancetype)initWithValue:(id)value schema:(RLMSchema *)schema NS_DESIGNATED_INITIALIZER;
-
-// live accessor initializer
-- (instancetype)initWithRealm:(__unsafe_unretained RLMRealm *const)realm
-                       schema:(RLMObjectSchema *)schema NS_DESIGNATED_INITIALIZER;
++ (nullable NSArray<RLMProperty *> *)_getPropertiesWithInstance:(id)obj;
++ (bool)_realmIgnoreClass;
 
 @end
 
@@ -60,18 +44,6 @@ typedef NS_ENUM(int32_t, RLMPropertyType);
 
 @end
 
-// A reference to an object's row that doesn't keep the object accessor alive.
-// Used by some Swift property types, such as LinkingObjects, to avoid retain cycles
-// with their containing object.
-@interface RLMWeakObjectHandle : NSObject<NSCopying>
-
-- (instancetype)initWithObject:(RLMObjectBase *)object;
-
-// Consumes the row, so can only usefully be called once.
-@property (nonatomic, readonly) RLMObjectBase *object;
-
-@end
-
 // Calls valueForKey: and re-raises NSUndefinedKeyExceptions
 FOUNDATION_EXTERN id _Nullable RLMValidatedValueForProperty(id object, NSString *key, NSString *className);
 
@@ -90,58 +62,11 @@ FOUNDATION_EXTERN BOOL RLMIsObjectOrSubclass(Class klass);
 // Returns whether the class is an indirect descendant of RLMObjectBase
 FOUNDATION_EXTERN BOOL RLMIsObjectSubclass(Class klass);
 
-// For unit testing purposes, allow an Objective-C class named FakeObject to also be used
-// as the base class of managed objects. This allows for testing invalid schemas.
-FOUNDATION_EXTERN void RLMSetTreatFakeObjectAsRLMObject(BOOL flag);
-
-// Get ObjectUil class for objc or swift
-FOUNDATION_EXTERN Class RLMObjectUtilClass(BOOL isSwift);
-
 FOUNDATION_EXTERN const NSUInteger RLMDescriptionMaxDepth;
 
-@interface RLMObjectUtil : NSObject
-
-+ (nullable NSArray<NSString *> *)ignoredPropertiesForClass:(Class)cls;
-+ (nullable NSArray<NSString *> *)indexedPropertiesForClass:(Class)cls;
-+ (nullable NSDictionary<NSString *, NSDictionary<NSString *, NSString *> *> *)linkingObjectsPropertiesForClass:(Class)cls;
-
-// Precondition: these must be returned in ascending order.
-+ (nullable NSArray<RLMSwiftPropertyMetadata *> *)getSwiftProperties:(id)obj;
-
-+ (nullable NSDictionary<NSString *, NSNumber *> *)getOptionalProperties:(id)obj;
-+ (nullable NSArray<NSString *> *)requiredPropertiesForClass:(Class)cls;
-
-@end
-
-typedef NS_ENUM(NSUInteger, RLMSwiftPropertyKind) {
-    RLMSwiftPropertyKindList,
-    RLMSwiftPropertyKindLinkingObjects,
-    RLMSwiftPropertyKindOptional,
-    RLMSwiftPropertyKindNilLiteralOptional,   // For Swift optional properties that reflect as nil
-    RLMSwiftPropertyKindOther,
-};
-
-// Metadata that describes a Swift generic property.
-@interface RLMSwiftPropertyMetadata : NSObject
-
-@property (nonatomic, strong) NSString *propertyName;
-@property (nullable, nonatomic, strong) NSString *className;
-@property (nullable, nonatomic, strong) NSString *linkedPropertyName;
-@property (nonatomic) RLMPropertyType propertyType;
-@property (nonatomic) RLMSwiftPropertyKind kind;
-
-+ (instancetype)metadataForOtherProperty:(NSString *)propertyName;
-
-+ (instancetype)metadataForListProperty:(NSString *)propertyName;
-
-+ (instancetype)metadataForLinkingObjectsProperty:(NSString *)propertyName
-                                        className:(NSString *)className
-                               linkedPropertyName:(NSString *)linkedPropertyName;
-
-+ (instancetype)metadataForOptionalProperty:(NSString *)propertyName type:(RLMPropertyType)type;
-
-+ (instancetype)metadataForNilLiteralOptionalProperty:(NSString *)propertyName;
-
+@interface RLMManagedPropertyAccessor : NSObject
++ (void)initializeObject:(void *)object parent:(RLMObjectBase *)parent property:(RLMProperty *)property;
++ (id)get:(void *)pointer;
 @end
 
 NS_ASSUME_NONNULL_END
diff --git a/Pods/Realm/include/RLMObject_Private.hpp b/Pods/Realm/include/RLMObject_Private.hpp
index 7f79dd6..3113961 100644
--- a/Pods/Realm/include/RLMObject_Private.hpp
+++ b/Pods/Realm/include/RLMObject_Private.hpp
@@ -35,9 +35,7 @@ class RLMObservationInfo;
 }
 @end
 
-// FIXME-2.0: This should be folded into initWithRealm:schema:, but changing the
-// signature of that is a breaking change for Swift
-id RLMCreateManagedAccessor(Class cls, RLMRealm *realm, RLMClassInfo *info) NS_RETURNS_RETAINED;
+id RLMCreateManagedAccessor(Class cls, RLMClassInfo *info) NS_RETURNS_RETAINED;
 
 // throw an exception if the object is invalidated or on the wrong thread
 static inline void RLMVerifyAttached(__unsafe_unretained RLMObjectBase *const obj) {
diff --git a/Pods/Realm/include/RLMProperty_Private.h b/Pods/Realm/include/RLMProperty_Private.h
index 1e4e5ec..5829f7e 100644
--- a/Pods/Realm/include/RLMProperty_Private.h
+++ b/Pods/Realm/include/RLMProperty_Private.h
@@ -72,31 +72,23 @@ static inline NSString *RLMTypeToString(RLMPropertyType type) {
                                  property:(objc_property_t)property
                                  instance:(RLMObjectBase *)objectInstance;
 
-- (instancetype)initSwiftListPropertyWithName:(NSString *)name
-                                     instance:(id)object;
-
-- (instancetype)initSwiftOptionalPropertyWithName:(NSString *)name
-                                          indexed:(BOOL)indexed
-                                             ivar:(Ivar)ivar
-                                     propertyType:(RLMPropertyType)propertyType;
-
-- (instancetype)initSwiftLinkingObjectsPropertyWithName:(NSString *)name
-                                                   ivar:(Ivar)ivar
-                                        objectClassName:(nullable NSString *)objectClassName
-                                 linkOriginPropertyName:(nullable NSString *)linkOriginPropertyName;
+- (void)updateAccessors;
 
 // private setters
 @property (nonatomic, readwrite) NSString *name;
 @property (nonatomic, readwrite, assign) RLMPropertyType type;
 @property (nonatomic, readwrite) BOOL indexed;
 @property (nonatomic, readwrite) BOOL optional;
+@property (nonatomic, readwrite) BOOL array;
 @property (nonatomic, copy, nullable) NSString *objectClassName;
+@property (nonatomic, copy, nullable) NSString *linkOriginPropertyName;
 
 // private properties
-@property (nonatomic, readwrite) NSString *columnName;
+@property (nonatomic, readwrite, nullable) NSString *columnName;
 @property (nonatomic, assign) NSUInteger index;
 @property (nonatomic, assign) BOOL isPrimary;
-@property (nonatomic, assign) Ivar swiftIvar;
+@property (nonatomic, assign, nullable) Ivar swiftIvar;
+@property (nonatomic, assign, nullable) Class swiftAccessor;
 
 // getter and setter names
 @property (nonatomic, copy) NSString *getterName;
diff --git a/Pods/Realm/include/RLMRealm+Sync.h b/Pods/Realm/include/RLMRealm+Sync.h
index ccfcb02..42f1616 100644
--- a/Pods/Realm/include/RLMRealm+Sync.h
+++ b/Pods/Realm/include/RLMRealm+Sync.h
@@ -32,18 +32,9 @@ NS_ASSUME_NONNULL_BEGIN
 ///
 @interface RLMRealm (Sync)
 
-/**
- If the Realm is a partially synchronized Realm, fetch and synchronize the objects
- of a given object type that match the given query (in string format).
-
- The results will be returned asynchronously in the callback.
- Use `-[RLMResults addNotificationBlock:]` to be notified to changes to the set of
- synchronized objects.
-
- @warning Partial synchronization is a tech preview. Its APIs are subject to change.
-*/
+/// :nodoc:
 - (void)subscribeToObjects:(Class)type where:(NSString *)query callback:(RLMPartialSyncFetchCallback)callback
-__deprecated_msg("Use -[RLMResults subscribe]");
+__attribute__((unavailable("Use -[RLMResults subscribe]")));
 
 /**
  Get the RLMSyncSession used by this Realm. Will be nil if this is not a
diff --git a/Pods/Realm/include/RLMRealm.h b/Pods/Realm/include/RLMRealm.h
index aa55417..cbc99ce 100644
--- a/Pods/Realm/include/RLMRealm.h
+++ b/Pods/Realm/include/RLMRealm.h
@@ -19,7 +19,7 @@
 #import <Foundation/Foundation.h>
 #import "RLMConstants.h"
 
-@class RLMRealmConfiguration, RLMRealm, RLMObject, RLMSchema, RLMMigration, RLMNotificationToken, RLMThreadSafeReference;
+@class RLMRealmConfiguration, RLMRealm, RLMObject, RLMSchema, RLMMigration, RLMNotificationToken, RLMThreadSafeReference, RLMAsyncOpenTask;
 struct RLMRealmPrivileges;
 struct RLMClassPrivileges;
 struct RLMObjectPrivileges;
@@ -121,7 +121,7 @@ NS_ASSUME_NONNULL_BEGIN
        thread, accessing the returned Realm outside the callback block (even if
        accessed from `callbackQueue`) is unsafe.
  */
-+ (void)asyncOpenWithConfiguration:(RLMRealmConfiguration *)configuration
++ (RLMAsyncOpenTask *)asyncOpenWithConfiguration:(RLMRealmConfiguration *)configuration
                      callbackQueue:(dispatch_queue_t)callbackQueue
                           callback:(RLMAsyncOpenRealmCallback)callback;
 
@@ -149,6 +149,61 @@ NS_ASSUME_NONNULL_BEGIN
  */
 @property (nonatomic, readonly) BOOL isEmpty;
 
+#pragma mark - File Management
+
+/**
+ Writes a compacted and optionally encrypted copy of the Realm to the given local URL.
+
+ The destination file cannot already exist.
+
+ Note that if this method is called from within a write transaction, the
+ *current* data is written, not the data from the point when the previous write
+ transaction was committed.
+
+ @param fileURL Local URL to save the Realm to.
+ @param key     Optional 64-byte encryption key to encrypt the new file with.
+ @param error   If an error occurs, upon return contains an `NSError` object
+ that describes the problem. If you are not interested in
+ possible errors, pass in `NULL`.
+
+ @return `YES` if the Realm was successfully written to disk, `NO` if an error occurred.
+ */
+- (BOOL)writeCopyToURL:(NSURL *)fileURL encryptionKey:(nullable NSData *)key error:(NSError **)error;
+
+/**
+ Checks if the Realm file for the given configuration exists locally on disk.
+
+ For non-synchronized, non-in-memory Realms, this is equivalent to
+ `-[NSFileManager.defaultManager fileExistsAtPath:config.path]`. For
+ synchronized Realms, it takes care of computing the actual path on disk based
+ on the server, virtual path, and user as is done when opening the Realm.
+
+ @param config A Realm configuration to check the existence of.
+ @return YES if the Realm file for the given configuration exists on disk, NO otherwise.
+ */
++ (BOOL)fileExistsForConfiguration:(RLMRealmConfiguration *)config;
+
+/**
+ Deletes the local Realm file and associated temporary files for the given configuration.
+
+ This deletes the ".realm", ".note" and ".management" files which would be
+ created by opening the Realm with the given configuration. It does not delete
+ the ".lock" file (which contains no persisted data and is recreated from
+ scratch every time the Realm file is opened).
+
+ The Realm must not be currently open on any thread or in another process. If
+ it is, this will return NO and report the error RLMErrorAlreadyOpen. Attempting to open
+ the Realm on another thread while the deletion is happening will block (and
+ then create a new Realm and open that afterwards).
+
+ If the Realm already does not exist this will return `NO` and report the error NSFileNoSuchFileError;
+
+ @param config A Realm configuration identifying the Realm to be deleted.
+ @return YES if any files were deleted, NO otherwise.
+ */
++ (BOOL)deleteFilesForConfiguration:(RLMRealmConfiguration *)config error:(NSError **)error
+ __attribute__((swift_error(nonnull_error)));
+
 #pragma mark - Notifications
 
 /**
@@ -189,9 +244,6 @@ typedef void (^RLMNotificationBlock)(RLMNotification notification, RLMRealm *rea
  */
 - (RLMNotificationToken *)addNotificationBlock:(RLMNotificationBlock)block __attribute__((warn_unused_result));
 
-#pragma mark - Transactions
-
-
 #pragma mark - Writing to a Realm
 
 /**
@@ -326,10 +378,24 @@ typedef void (^RLMNotificationBlock)(RLMNotification notification, RLMRealm *rea
 /**
  Performs actions contained within the given block inside a write transaction.
 
- @see `[RLMRealm transactionWithBlock:error:]`
+ @see `[RLMRealm transactionWithoutNotifying:block:error:]`
  */
 - (void)transactionWithBlock:(__attribute__((noescape)) void(^)(void))block NS_SWIFT_UNAVAILABLE("");
 
+/**
+ Performs actions contained within the given block inside a write transaction.
+
+ @see `[RLMRealm transactionWithoutNotifying:block:error:]`
+ */
+- (BOOL)transactionWithBlock:(__attribute__((noescape)) void(^)(void))block error:(NSError **)error;
+
+/**
+ Performs actions contained within the given block inside a write transaction.
+
+ @see `[RLMRealm transactionWithoutNotifying:block:error:]`
+ */
+- (void)transactionWithoutNotifying:(NSArray<RLMNotificationToken *> *)tokens block:(__attribute__((noescape)) void(^)(void))block;
+
 /**
  Performs actions contained within the given block inside a write transaction.
 
@@ -343,6 +409,19 @@ typedef void (^RLMNotificationBlock)(RLMNotification notification, RLMRealm *rea
  generates notifications if applicable. This has no effect if the Realm
  was already up to date.
 
+ You can skip notifiying specific notification blocks about the changes made
+ in this write transaction by passing in their associated notification tokens.
+ This is primarily useful when the write transaction is saving changes already
+ made in the UI and you do not want to have the notification block attempt to
+ re-apply the same changes.
+
+ The tokens passed to this method must be for notifications for this specific
+ `RLMRealm` instance. Notifications for different threads cannot be skipped
+ using this method.
+
+ @param tokens An array of notification tokens which were returned from adding
+               callbacks which you do not want to be notified for the changes
+               made in this write transaction.
  @param block The block containing actions to perform.
  @param error If an error occurs, upon return contains an `NSError` object
               that describes the problem. If you are not interested in
@@ -350,7 +429,7 @@ typedef void (^RLMNotificationBlock)(RLMNotification notification, RLMRealm *rea
 
  @return Whether the transaction succeeded.
  */
-- (BOOL)transactionWithBlock:(__attribute__((noescape)) void(^)(void))block error:(NSError **)error;
+- (BOOL)transactionWithoutNotifying:(NSArray<RLMNotificationToken *> *)tokens block:(__attribute__((noescape)) void(^)(void))block error:(NSError **)error;
 
 /**
  Updates the Realm and outstanding objects managed by the Realm to point to the
@@ -398,25 +477,6 @@ typedef void (^RLMNotificationBlock)(RLMNotification notification, RLMRealm *rea
  */
 @property (nonatomic) BOOL autorefresh;
 
-/**
- Writes a compacted and optionally encrypted copy of the Realm to the given local URL.
-
- The destination file cannot already exist.
-
- Note that if this method is called from within a write transaction, the
- *current* data is written, not the data from the point when the previous write
- transaction was committed.
-
- @param fileURL Local URL to save the Realm to.
- @param key     Optional 64-byte encryption key to encrypt the new file with.
- @param error   If an error occurs, upon return contains an `NSError` object
-                that describes the problem. If you are not interested in
-                possible errors, pass in `NULL`.
-
- @return `YES` if the Realm was successfully written to disk, `NO` if an error occurred.
-*/
-- (BOOL)writeCopyToURL:(NSURL *)fileURL encryptionKey:(nullable NSData *)key error:(NSError **)error;
-
 /**
  Invalidates all `RLMObject`s, `RLMResults`, `RLMLinkingObjects`, and `RLMArray`s managed by the Realm.
 
diff --git a/Pods/Realm/include/RLMRealm_Private.h b/Pods/Realm/include/RLMRealm_Private.h
index a2368c3..ae13f1e 100644
--- a/Pods/Realm/include/RLMRealm_Private.h
+++ b/Pods/Realm/include/RLMRealm_Private.h
@@ -29,6 +29,9 @@ FOUNDATION_EXTERN NSData * _Nullable RLMRealmValidatedEncryptionKey(NSData *key)
 
 FOUNDATION_EXTERN RLMSyncSubscription *RLMCastToSyncSubscription(id obj);
 
+// Set the queue used for async open. For testing purposes only.
+FOUNDATION_EXTERN void RLMSetAsyncOpenQueue(dispatch_queue_t queue);
+
 // Translate an in-flight exception resulting from an operation on a SharedGroup to
 // an NSError or NSException (if error is nil)
 void RLMRealmTranslateException(NSError **error);
diff --git a/Pods/Realm/include/RLMSyncConfiguration.h b/Pods/Realm/include/RLMSyncConfiguration.h
index 7aaca81..5a74db2 100644
--- a/Pods/Realm/include/RLMSyncConfiguration.h
+++ b/Pods/Realm/include/RLMSyncConfiguration.h
@@ -62,14 +62,8 @@ NS_ASSUME_NONNULL_BEGIN
  */
 @property (nonatomic) BOOL enableSSLValidation;
 
-/**
- Whether this Realm should be opened in 'partial synchronization' mode.
- Partial synchronization mode means that no objects are synchronized from the remote Realm
- except those matching queries that the user explicitly specifies.
-
- @warning Partial synchronization is a tech preview. Its APIs are subject to change.
- */
-@property (nonatomic) BOOL isPartial DEPRECATED_MSG_ATTRIBUTE("Use 'fullSynchronization' instead.");
+/// :nodoc:
+@property (nonatomic) BOOL isPartial __attribute__((unavailable("Use 'fullSynchronization' instead.")));
 
 /**
  Whether this Realm should be a fully synchronized Realm.
@@ -92,29 +86,22 @@ NS_ASSUME_NONNULL_BEGIN
 @property (nonatomic, nullable, copy) NSString *urlPrefix;
 
 /**
- Create a sync configuration instance.
+ Whether nonfatal connection errors should cancel async opens.
 
- @param user    A `RLMSyncUser` that owns the Realm at the given URL.
- @param url     The unresolved absolute URL to the Realm on the Realm Object Server, e.g.
-                `realm://example.org/~/path/to/realm`. "Unresolved" means the path should
-                contain the wildcard marker `~`, which will automatically be filled in with
-                the user identity by the Realm Object Server.
- */
-- (instancetype)initWithUser:(RLMSyncUser *)user realmURL:(NSURL *)url __attribute__((deprecated("Use [RLMSyncUser configurationWithURL] instead")));
-
-/**
-Return a Realm configuration for syncing with the default Realm of the currently logged-in sync user.
+ By default, if a nonfatal connection error such as a connection timing out occurs, any currently pending asyncOpen operations will ignore the error and continue to retry until it succeeds. If this is set to true, the open will instead fail and report the error.
 
-Partial synchronization is enabled in the returned configuration.
+  FIXME: This should probably be true by default in the next major version.
  */
-+ (RLMRealmConfiguration *)automaticConfiguration __attribute__((deprecated("Use [RLMSyncUser configuration] instead")));
+@property (nonatomic) bool cancelAsyncOpenOnNonFatalErrors;
 
-/**
- Return a Realm configuration for syncing with the default Realm of the given sync user.
+/// :nodoc:
+- (instancetype)initWithUser:(RLMSyncUser *)user realmURL:(NSURL *)url __attribute__((unavailable("Use [RLMSyncUser configurationWithURL:] instead")));
 
- Partial synchronization is enabled in the returned configuration.
- */
-+ (RLMRealmConfiguration *)automaticConfigurationForUser:(RLMSyncUser *)user __attribute__((deprecated("Use [RLMSyncUser configuration] instead")));
+/// :nodoc:
++ (RLMRealmConfiguration *)automaticConfiguration __attribute__((unavailable("Use [RLMSyncUser configuration] instead")));
+
+/// :nodoc:
++ (RLMRealmConfiguration *)automaticConfigurationForUser:(RLMSyncUser *)user __attribute__((unavailable("Use [RLMSyncUser configuration] instead")));
 
 /// :nodoc:
 - (instancetype)init __attribute__((unavailable("This type cannot be created directly")));
diff --git a/Pods/Realm/include/RLMSyncConfiguration_Private.h b/Pods/Realm/include/RLMSyncConfiguration_Private.h
index b3c4a7e..07bf0a2 100644
--- a/Pods/Realm/include/RLMSyncConfiguration_Private.h
+++ b/Pods/Realm/include/RLMSyncConfiguration_Private.h
@@ -18,9 +18,11 @@
 
 #import <Realm/RLMSyncConfiguration.h>
 
+#import <Realm/RLMConstants.h>
+
 NS_ASSUME_NONNULL_BEGIN
 
-typedef NS_ENUM(NSUInteger, RLMSyncStopPolicy) {
+typedef RLM_CLOSED_ENUM(NSUInteger, RLMSyncStopPolicy) {
     RLMSyncStopPolicyImmediately,
     RLMSyncStopPolicyLiveIndefinitely,
     RLMSyncStopPolicyAfterChangesUploaded,
diff --git a/Pods/Realm/include/RLMSyncConfiguration_Private.hpp b/Pods/Realm/include/RLMSyncConfiguration_Private.hpp
index e80095e..6314e4c 100644
--- a/Pods/Realm/include/RLMSyncConfiguration_Private.hpp
+++ b/Pods/Realm/include/RLMSyncConfiguration_Private.hpp
@@ -36,12 +36,11 @@ NS_ASSUME_NONNULL_BEGIN
                     realmURL:(NSURL *)url
                customFileURL:(nullable NSURL *)customFileURL
                    isPartial:(BOOL)isPartial
-                  stopPolicy:(RLMSyncStopPolicy)stopPolicy
-                errorHandler:(std::function<realm::SyncSessionErrorHandler>)errorHandler;
+                  stopPolicy:(RLMSyncStopPolicy)stopPolicy;
 
 - (instancetype)initWithRawConfig:(realm::SyncConfig)config;
 
-- (realm::SyncConfig)rawConfiguration;
+- (realm::SyncConfig&)rawConfiguration;
 
 @end
 
diff --git a/Pods/Realm/include/RLMSyncCredentials.h b/Pods/Realm/include/RLMSyncCredentials.h
index c90fb4c..6c99ce5 100644
--- a/Pods/Realm/include/RLMSyncCredentials.h
+++ b/Pods/Realm/include/RLMSyncCredentials.h
@@ -52,7 +52,7 @@ extern RLMIdentityProvider const RLMIdentityProviderJWT;
 extern RLMIdentityProvider const RLMIdentityProviderAnonymous;
 
 /// A Nickname account as an identity provider.
-extern RLMIdentityProvider const RLMIdentityProviderNickname;
+extern RLMIdentityProvider const RLMIdentityProviderNickname __deprecated_msg("Use RLMIdentityProviderUsernamePassword instead");
 
 /**
  Opaque credentials representing a specific Realm Object Server user.
@@ -103,7 +103,7 @@ extern RLMIdentityProvider const RLMIdentityProviderNickname;
 /**
  Construct and return credentials from a nickname
  */
-+ (instancetype)credentialsWithNickname:(NSString *)nickname isAdmin:(BOOL)isAdmin;
++ (instancetype)credentialsWithNickname:(NSString *)nickname isAdmin:(BOOL)isAdmin __deprecated_msg("Use +credentialsWithUsername instead");
 
 /**
  Construct and return special credentials representing a token that can
@@ -121,6 +121,24 @@ extern RLMIdentityProvider const RLMIdentityProviderNickname;
  */
 + (instancetype)credentialsWithAccessToken:(RLMServerToken)accessToken identity:(NSString *)identity;
 
+/**
+ Construct and return special credentials representing a token issued by an external entity
+ that will be used instead of a ROS refresh token.
+
+ @discussion Unlike other types of credentials, CustomRefreshToken credentials do not
+             participate in the regular login flow, because they take place of the refresh tokens login produces.
+             Instead, the token will be used to authorize each server operation such as opening a Realm or
+             editing permissions. When the token expires the SyncUser object will still be valid, but server operations will
+             fail until the token is updated.
+
+ @remark ROS must be configured to accept the external issuing identity as a refresh token validator.
+
+ @warning The values of @c identity and @c isAdmin are used for client-side validation only.
+          The server will compute their values based on the token string and the token validator configuration,
+          but it's important for  correct functioning that the values here match the server.
+ */
++ (instancetype)credentialsWithCustomRefreshToken:(NSString *)token identity:(NSString *)identity isAdmin:(BOOL)isAdmin;
+
 /**
  Construct and return credentials with a custom token string, identity provider string, and optional user info. In most
  cases, the convenience initializers should be used instead.
diff --git a/Pods/Realm/include/RLMSyncManager.h b/Pods/Realm/include/RLMSyncManager.h
index c6b401e..debb5d4 100644
--- a/Pods/Realm/include/RLMSyncManager.h
+++ b/Pods/Realm/include/RLMSyncManager.h
@@ -20,10 +20,12 @@
 
 #import "RLMSyncUtil.h"
 
-@class RLMSyncSession;
+@class RLMSyncSession, RLMSyncTimeoutOptions;
+
+NS_ASSUME_NONNULL_BEGIN
 
 /// An enum representing different levels of sync-related logging that can be configured.
-typedef NS_ENUM(NSUInteger, RLMSyncLogLevel) {
+typedef RLM_CLOSED_ENUM(NSUInteger, RLMSyncLogLevel) {
     /// Nothing will ever be logged.
     RLMSyncLogLevelOff,
     /// Only fatal errors will be logged.
@@ -50,7 +52,11 @@ typedef NS_ENUM(NSUInteger, RLMSyncLogLevel) {
     RLMSyncLogLevelAll
 };
 
-NS_ASSUME_NONNULL_BEGIN
+/// A log callback function which can be set on RLMSyncManager.
+///
+/// The log function may be called from multiple threads simultaneously, and is
+/// responsible for performing its own synchronization if any is required.
+typedef void (*RLMSyncLogFunction)(RLMSyncLogLevel level, NSString *message);
 
 /// A block type representing a block which can be used to report a sync-related error to the application. If the error
 /// pertains to a specific session, that session will also be passed into the block.
@@ -95,13 +101,24 @@ typedef void(^RLMSyncErrorReportingBlock)(NSError *, RLMSyncSession * _Nullable)
  The logging threshold which newly opened synced Realms will use. Defaults to
  `RLMSyncLogLevelInfo`.
 
- Logging strings are output to Apple System Logger.
+ By default logging strings are output to Apple System Logger. Set `logger` to
+ perform custom logging logic instead.
 
  @warning This property must be set before any synced Realms are opened. Setting it after
           opening any synced Realm will do nothing.
  */
 @property (nonatomic) RLMSyncLogLevel logLevel;
 
+/**
+ The function which will be invoked whenever the sync client has a log message.
+
+ If nil, log strings are output to Apple System Logger instead.
+
+ @warning This property must be set before any synced Realms are opened. Setting
+ it after opening any synced Realm will do nothing.
+ */
+@property (nonatomic, nullable) RLMSyncLogFunction logger;
+
 /**
  The name of the HTTP header to send authorization data in when making requests to a Realm Object Server which has
  been configured to expect a custom authorization header.
@@ -110,6 +127,9 @@ typedef void(^RLMSyncErrorReportingBlock)(NSError *, RLMSyncSession * _Nullable)
 
 /**
  Extra HTTP headers to append to every request to a Realm Object Server.
+
+ Modifying this property while sync sessions are active will result in all
+ sessions disconnecting and reconnecting using the new headers.
  */
 @property (nullable, nonatomic, copy) NSDictionary<NSString *, NSString *> *customRequestHeaders;
 
@@ -138,6 +158,16 @@ typedef void(^RLMSyncErrorReportingBlock)(NSError *, RLMSyncSession * _Nullable)
  */
 @property (nullable, nonatomic, copy) NSDictionary<NSString *, NSURL *> *pinnedCertificatePaths;
 
+/**
+ Options for the assorted types of connection timeouts for sync connections.
+
+ If nil default values for all timeouts are used instead.
+
+ @warning This property must be set before any synced Realms are opened. Setting
+ it after opening any synced Realm will do nothing.
+ */
+@property (nullable, nonatomic, copy) RLMSyncTimeoutOptions *timeoutOptions;
+
 /// The sole instance of the singleton.
 + (instancetype)sharedManager NS_REFINED_FOR_SWIFT;
 
@@ -147,6 +177,69 @@ typedef void(^RLMSyncErrorReportingBlock)(NSError *, RLMSyncSession * _Nullable)
 /// :nodoc:
 + (instancetype)new __attribute__((unavailable("RLMSyncManager cannot be created directly")));
 
-NS_ASSUME_NONNULL_END
+@end
 
+/**
+  Options for configuring timeouts and intervals in the sync client.
+ */
+@interface RLMSyncTimeoutOptions : NSObject
+/// The maximum number of milliseconds to allow for a connection to
+/// become fully established. This includes the time to resolve the
+/// network address, the TCP connect operation, the SSL handshake, and
+/// the WebSocket handshake.
+///
+/// Defaults to 2 minutes.
+@property (nonatomic) NSUInteger connectTimeout;
+
+/// The number of milliseconds to keep a connection open after all
+/// sessions have been abandoned.
+///
+/// After all synchronized Realms have been closed for a given server, the
+/// connection is kept open until the linger time has expire to avoid the
+/// overhead of reestablishing the connection when Realms are being closed and
+/// reopened.
+///
+/// Defaults to 30 seconds.
+@property (nonatomic) NSUInteger connectionLingerTime;
+
+/// The number of milliseconds between each heartbeat ping message.
+///
+/// The client periodically sends ping messages to the server to check if the
+/// connection is still alive. Shorter periods make connection state change
+/// notifications more responsive at the cost of battery life (as the antenna
+/// will have to wake up more often).
+///
+/// Defaults to 1 minute.
+@property (nonatomic) NSUInteger pingKeepalivePeriod;
+
+/// How long in milliseconds to wait for a reponse to a heartbeat ping before
+/// concluding that the connection has dropped.
+///
+/// Shorter values will make connection state change notifications more
+/// responsive as it will only change to `disconnected` after this much time has
+/// elapsed, but overly short values may result in spurious disconnection
+/// notifications when the server is simply taking a long time to respond.
+///
+/// Defaults to 2 minutes.
+@property (nonatomic) NSUInteger pongKeepaliveTimeout;
+
+/// The maximum amount of time, in milliseconds, since the loss of a
+/// prior connection, for a new connection to be considered a "fast
+/// reconnect".
+///
+/// When a client first connects to the server, it defers uploading any local
+/// changes until it has downloaded all changesets from the server. This
+/// typically reduces the total amount of merging that has to be done, and is
+/// particularly beneficial the first time that a specific client ever connects
+/// to the server.
+///
+/// When an existing client disconnects and then reconnects within the "fact
+/// reconnect" time this is skipped and any local changes are uploaded
+/// immediately without waiting for downloads, just as if the client was online
+/// the whole time.
+///
+/// Defaults to 1 minute.
+@property (nonatomic) NSUInteger fastReconnectLimit;
 @end
+
+NS_ASSUME_NONNULL_END
diff --git a/Pods/Realm/include/RLMSyncManager_Private.h b/Pods/Realm/include/RLMSyncManager_Private.h
index 7cb660b..0284aee 100644
--- a/Pods/Realm/include/RLMSyncManager_Private.h
+++ b/Pods/Realm/include/RLMSyncManager_Private.h
@@ -34,13 +34,6 @@ NS_ASSUME_NONNULL_BEGIN
 
 - (void)_fireError:(NSError *)error;
 
-- (void)_fireErrorWithCode:(int)errorCode
-                   message:(NSString *)message
-                   isFatal:(BOOL)fatal
-                   session:(RLMSyncSession *)session
-                  userInfo:(NSDictionary *)userInfo
-                errorClass:(RLMSyncSystemErrorKind)errorClass;
-
 - (NSArray<RLMSyncUser *> *)_allUsers;
 
 + (void)resetForTesting;
diff --git a/Pods/Realm/include/RLMSyncPermission.h b/Pods/Realm/include/RLMSyncPermission.h
index c0677a0..96835cc 100644
--- a/Pods/Realm/include/RLMSyncPermission.h
+++ b/Pods/Realm/include/RLMSyncPermission.h
@@ -16,6 +16,7 @@
 //
 ////////////////////////////////////////////////////////////////////////////
 
+#import <Realm/RLMConstants.h>
 #import <Realm/RLMObject.h>
 
 @protocol RLMPermission, RLMPermissionUser;
@@ -362,7 +363,7 @@ FOUNDATION_EXTERN id RLMPermissionForRole(RLMArray *array, id role);
  access to a Realm can always read from that Realm, and users with
  administrative access can always read or write from the Realm.
  */
-typedef NS_ENUM(NSUInteger, RLMSyncAccessLevel) {
+typedef RLM_CLOSED_ENUM(NSUInteger, RLMSyncAccessLevel) {
     /// No access whatsoever.
     RLMSyncAccessLevelNone          = 0,
     /**
@@ -381,20 +382,13 @@ typedef NS_ENUM(NSUInteger, RLMSyncAccessLevel) {
     RLMSyncAccessLevelAdmin         = 3,
 };
 
-/**
- A property on which a `RLMResults<RLMSyncPermission *>` can be queried or filtered.
-
- @warning If building `NSPredicate`s using format strings including these string
-          constants, use %K instead of %@ as the substitution parameter.
- */
-typedef NSString * RLMSyncPermissionSortProperty NS_STRING_ENUM;
+/// Get a string representing a sync acces level
+FOUNDATION_EXTERN NSString *RLMSyncAccessLevelToString(RLMSyncAccessLevel);
 
-/// Sort by the Realm Object Server path to the Realm to which the permission applies.
-extern RLMSyncPermissionSortProperty const RLMSyncPermissionSortPropertyPath;
-/// Sort by the identity of the user to whom the permission applies.
-extern RLMSyncPermissionSortProperty const RLMSyncPermissionSortPropertyUserID;
-/// Sort by the date the permissions were last updated.
-extern RLMSyncPermissionSortProperty const RLMSyncPermissionSortPropertyUpdated;
+/// Get a sync access level for the given string.
+///
+/// Throws an exception if the string is not a valid access level.
+FOUNDATION_EXTERN RLMSyncAccessLevel RLMSyncAccessLevelFromString(NSString *);
 
 /**
  A value representing a permission granted to the specified user(s) to access the specified Realm(s).
@@ -498,4 +492,36 @@ __attribute__((unavailable("Renamed to `-initWithRealmPath:identity:accessLevel:
 
 @end
 
+/**
+ A pending offer to grant permissions on a Realm path.
+
+ This type is immutable and can be safely read from any thread.
+
+ @see -[RLMSyncUser retrievePermissionOffersWithCallback:]
+ */
+@interface RLMSyncPermissionOffer : NSObject
+/// The Realm Object Server path to the Realm to which this permission applies (e.g. "/path/to/realm").
+@property (nonatomic, readonly) NSString *realmPath;
+/// The token which can be used to aceept or revoke this offer.
+@property (nonatomic, readonly) NSString *token;
+/// The date when this offer will expire, or nil for a non-expiring offer.
+@property (nonatomic, nullable, readonly) NSDate *expiresAt;
+/// The date when this offer was created.
+@property (nonatomic, nullable, readonly) NSDate *createdAt;
+/// The access level which this offer grants.
+@property (nonatomic, readonly) RLMSyncAccessLevel accessLevel;
+
+/// :nodoc:
+- (instancetype)init __attribute__((unavailable("Use the designated initializer")));
+/// :nodoc:
++ (instancetype)new __attribute__((unavailable("Use the designated initializer")));
+
+/// :nodoc:
+- (instancetype)initWithRealmPath:(NSString *)path
+                            token:(NSString *)token
+                        expiresAt:(NSDate *)expiresAt
+                        createdAt:(NSDate *)createdAt
+                      accessLevel:(RLMSyncAccessLevel)accessLevel;
+@end
+
 NS_ASSUME_NONNULL_END
diff --git a/Pods/Realm/include/RLMSyncPermission_Private.hpp b/Pods/Realm/include/RLMSyncPermission_Private.hpp
deleted file mode 100644
index 9d01adc..0000000
--- a/Pods/Realm/include/RLMSyncPermission_Private.hpp
+++ /dev/null
@@ -1,29 +0,0 @@
-////////////////////////////////////////////////////////////////////////////
-//
-// Copyright 2017 Realm Inc.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-////////////////////////////////////////////////////////////////////////////
-
-#import "RLMSyncPermission.h"
-
-#import "sync/sync_permission.hpp"
-
-@interface RLMSyncPermission ()
-
-- (instancetype)initWithPermission:(realm::Permission)permission;
-
-- (realm::Permission)rawPermission;
-
-@end
diff --git a/Pods/Realm/include/RLMSyncSession.h b/Pods/Realm/include/RLMSyncSession.h
index 0d809a4..3b26184 100644
--- a/Pods/Realm/include/RLMSyncSession.h
+++ b/Pods/Realm/include/RLMSyncSession.h
@@ -57,7 +57,7 @@ typedef NS_ENUM(NSUInteger, RLMSyncConnectionState) {
  Progress notification blocks can be registered on sessions if your app wishes to be informed
  how many bytes have been uploaded or downloaded, for example to show progress indicator UIs.
  */
-typedef NS_ENUM(NSUInteger, RLMSyncProgressDirection) {
+typedef RLM_CLOSED_ENUM(NSUInteger, RLMSyncProgressDirection) {
     /// For monitoring upload progress.
     RLMSyncProgressDirectionUpload,
     /// For monitoring download progress.
@@ -233,4 +233,46 @@ NS_REFINED_FOR_SWIFT;
 
 @end
 
+/**
+ A task object which can be used to observe or cancel an async open.
+
+ When a synchronized Realm is opened asynchronously, the latest state of the
+ Realm is downloaded from the server before the completion callback is invoked.
+ This task object can be used to observe the state of the download or to cancel
+ it. This should be used instead of trying to observe the download via the sync
+ session as the sync session itself is created asynchronously, and may not exist
+ yet when -[RLMRealm asyncOpenWithConfiguration:completion:] returns.
+ */
+@interface RLMAsyncOpenTask : NSObject
+/**
+ Register a progress notification block.
+
+ Each registered progress notification block is called whenever the sync
+ subsystem has new progress data to report until the task is either cancelled
+ or the completion callback is called. Progress notifications are delivered on
+ the main queue.
+ */
+- (void)addProgressNotificationBlock:(RLMProgressNotificationBlock)block;
+
+/**
+ Register a progress notification block which is called on the given queue.
+
+ Each registered progress notification block is called whenever the sync
+ subsystem has new progress data to report until the task is either cancelled
+ or the completion callback is called. Progress notifications are delivered on
+ the supplied queue.
+ */
+- (void)addProgressNotificationOnQueue:(dispatch_queue_t)queue
+                                 block:(RLMProgressNotificationBlock)block;
+
+/**
+ Cancel the asynchronous open.
+
+ Any download in progress will be cancelled, and the completion block for this
+ async open will never be called. If multiple async opens on the same Realm are
+ happening concurrently, all other opens will fail with the error "operation cancelled".
+ */
+- (void)cancel;
+@end
+
 NS_ASSUME_NONNULL_END
diff --git a/Pods/Realm/include/RLMSyncSession_Private.hpp b/Pods/Realm/include/RLMSyncSession_Private.hpp
index 76a06ad..b14d2f6 100644
--- a/Pods/Realm/include/RLMSyncSession_Private.hpp
+++ b/Pods/Realm/include/RLMSyncSession_Private.hpp
@@ -22,6 +22,7 @@
 #import <memory>
 
 namespace realm {
+class AsyncOpenTask;
 class SyncSession;
 }
 
@@ -48,4 +49,8 @@ NS_ASSUME_NONNULL_BEGIN
 
 @end
 
+@interface RLMAsyncOpenTask ()
+@property (nonatomic) std::shared_ptr<realm::AsyncOpenTask> task;
+@end
+
 NS_ASSUME_NONNULL_END
diff --git a/Pods/Realm/include/RLMSyncSubscription.h b/Pods/Realm/include/RLMSyncSubscription.h
index 13a8083..307daef 100644
--- a/Pods/Realm/include/RLMSyncSubscription.h
+++ b/Pods/Realm/include/RLMSyncSubscription.h
@@ -24,7 +24,7 @@ NS_ASSUME_NONNULL_BEGIN
 /**
  `RLMSyncSubscriptionState` is an enumeration representing the possible state of a sync subscription.
  */
-typedef NS_ENUM(NSInteger, RLMSyncSubscriptionState) {
+typedef RLM_CLOSED_ENUM(NSInteger, RLMSyncSubscriptionState) {
     /**
      An error occurred while creating the subscription or while the server was processing it.
      */
@@ -92,6 +92,63 @@ typedef NS_ENUM(NSInteger, RLMSyncSubscriptionState) {
  */
 @property (nonatomic, readonly, nullable) NSError *error;
 
+/**
+ The raw query which this subscription is running on the server.
+
+ This string is a serialized representation of the RLMResults which the
+ subscription was created from. This representation does *not* use NSPredicate
+ syntax, and is not guaranteed to remain consistent between versions of Realm.
+ Any use of this other than manual inspection when debugging is likely to be
+ incorrect.
+
+ This is `nil` while the subscription is in the Creating state.
+ */
+@property (nonatomic, readonly, nullable) NSString *query;
+
+/**
+ When this subscription was first created.
+
+ This value will be `nil` for subscriptions created with older versions of Realm
+ which did not store the creation date. Newly created subscriptions should
+ always have a non-nil creation date.
+ */
+@property (nonatomic, readonly, nullable) NSDate *createdAt;
+
+/**
+ When this subscription was last updated.
+
+ This value will be `nil` for subscriptions created with older versions of Realm
+ which did not store the update date. Newly created subscriptions should
+ always have a non-nil update date.
+
+ The update date is the time when the subscription was last updated by a call
+ to `-[RLMResults subscribeWithOptions:]`, and not when the set of objects which
+ match the subscription last changed.
+ */
+@property (nonatomic, readonly, nullable) NSDate *updatedAt;
+
+/**
+ When this subscription will be automatically removed.
+
+ If the `timeToLive` parameter is set when creating a sync subscription, the
+ subscription will be automatically removed the first time that any subscription
+ is created, modified, or deleted after that time has elapsed.
+
+ This property will be `nil` if the `timeToLive` option was not enabled.
+ */
+@property (nonatomic, readonly, nullable) NSDate *expiresAt;
+
+/**
+ How long this subscription will persist after last being updated.
+
+ If the `timeToLive` parameter is set when creating a sync subscription, the
+ subscription will be automatically removed the first time that any subscription
+ is created, modified, or deleted after that time has elapsed.
+
+ This property will be NaN if the `timeToLive` option was not enabled.
+ */
+@property (nonatomic, readonly) NSTimeInterval timeToLive;
+
 /**
  Remove this subscription.
 
@@ -121,6 +178,82 @@ typedef NS_ENUM(NSInteger, RLMSyncSubscriptionState) {
 
 @end
 
+/**
+ Configuration options for query-based sync subscriptions.
+ */
+@interface RLMSyncSubscriptionOptions : NSObject
+/**
+ The name of the subscription.
+
+ Naming a subscription makes it possible to look up a subscription by name
+ (using `-[RLMRealm subscriptionWithName:]`) or update an existing
+ subscription rather than creating a new one.
+ */
+@property (nonatomic, copy, nullable) NSString *name;
+
+/**
+ Whether this should update an existing subscription with the same name.
+
+ By default trying to create a subscription with a name that's already in use
+ will fail unless the new subscription is an exact match for the existing one.
+ If this is set to YES, instead the existing subscription will be updated using
+ the query and options from the new subscription. This only works if the new
+ subscription is for the same type of objects as the existing subscription.
+ Trying to overwrite a subscription with a subscription of a different type of
+ objects will fail.
+
+ The `updatedAt` and (if `timeToLive` is used) `expiresAt` properties are
+ updated whenever a subscription is overwritten even if nothing else has changed.
+ */
+@property (nonatomic) BOOL overwriteExisting;
+
+/**
+ How long (in seconds) a subscription should persist after being created.
+
+ By default subscriptions are persistent, and last until they are explicitly
+ removed by calling `unsubscribe()`. Subscriptions can instead be made temporary
+ by setting the time to live to how long the subscription should remain. After
+ that time has elapsed the subscription will be automatically removed.
+
+ A time to live of 0 or less disables subscription expiration.
+ */
+@property (nonatomic) NSTimeInterval timeToLive;
+
+/**
+ The maximum number of top-level matches to include in this subscription.
+
+ If more top-level objects than the limit match the query, only the first
+ `limit` objects will be included. This respects the sort and distinct order of
+ the query being subscribed to for the determination of what the "first" objects
+ are.
+
+ The limit does not count or apply to objects which are added indirectly due to
+ being linked to by the objects in the subscription or due to being listed in
+ `includeLinkingObjectProperties`. If the limit is larger than the number of
+ objects which match the query, all objects will be included. A limit of zero is
+ treated as unlimited.
+ */
+@property (nonatomic) NSUInteger limit;
+
+/**
+ Which RLMLinkingObjects properties should be included in the subscription.
+
+ Outgoing links (i.e. `RLMArray` and `RLMObject` properties) are automatically
+ included in sync subscriptions. That is, if you subscribe to a query which
+ matches one object, every object which is reachable via links from that object
+ are also included in the subscription.
+
+ By default, RLMLinkingObjects properties do not work this way. Instead, they
+ only report objects which happen to be included in a subscription. By naming
+ a RLMLinkingObjects property in this array, it can instead be treated as if
+ it was a RLMArray and include all objects which link to this object.
+
+ Any keypath which ends in a RLMLinkingObject property can be included in this
+ array, including ones involving intermediate links.
+ */
+@property (nonatomic, copy, nullable) NSArray<NSString *> *includeLinkingObjectProperties;
+@end
+
 /**
  Support for subscribing to the results of object queries in a synced Realm.
  */
@@ -214,6 +347,35 @@ typedef NS_ENUM(NSInteger, RLMSyncSubscriptionState) {
  @see RLMSyncSubscription
  */
 - (RLMSyncSubscription *)subscribeWithName:(nullable NSString *)subscriptionName limit:(NSUInteger)limit;
+
+/**
+ Subscribe to a subset of the query represented by this `RLMResults`.
+
+ Subscribing to a query asks the server to synchronize all objects to the
+ client which match the query, along with all objects which are reachable
+ from those objects via links. This happens asynchronously, and the local
+ client Realm may not immediately have all objects which match the query.
+ Observe the `state` property of the returned subscription object to be
+ notified of when the subscription has been processed by the server and
+ all objects matching the query are available.
+
+ Creating a new subscription with the same name and query as an existing
+ subscription will not create a new subscription, but instead will return
+ an object referring to the existing sync subscription. This means that
+ performing the same subscription twice followed by removing it once will
+ result in no subscription existing.
+
+ The newly created subscription will not be reported by
+ `-[RLMRealm subscriptions]` or `-[RLMRealm subscriptionWithName:]` until
+ `state` has transitioned from `RLMSyncSubscriptionStateCreating` to any of the
+ other states.
+
+ @param options The additional configuration options for the subscription.
+ @return The subscription.
+
+ @see RLMSyncSubscription
+ */
+- (RLMSyncSubscription *)subscribeWithOptions:(RLMSyncSubscriptionOptions *)options;
 @end
 
 /**
diff --git a/Pods/Realm/include/RLMSyncUser.h b/Pods/Realm/include/RLMSyncUser.h
index a412b84..d871490 100644
--- a/Pods/Realm/include/RLMSyncUser.h
+++ b/Pods/Realm/include/RLMSyncUser.h
@@ -19,11 +19,10 @@
 #import <Foundation/Foundation.h>
 
 #import "RLMRealmConfiguration.h"
-#import "RLMResults.h"
 #import "RLMSyncCredentials.h"
 #import "RLMSyncPermission.h"
 
-@class RLMSyncUser, RLMSyncUserInfo, RLMSyncCredentials, RLMSyncPermission, RLMSyncSession, RLMRealm;
+@class RLMSyncUser, RLMSyncUserInfo, RLMSyncCredentials, RLMSyncPermission, RLMSyncSession, RLMRealm, RLMSyncPermissionOffer;
 
 /**
  The state of the user object.
@@ -56,7 +55,11 @@ typedef void(^RLMPermissionOfferResponseStatusBlock)(NSURL * _Nullable, NSError
 
 /// A block type used to asynchronously report results of a permissions get operation.
 /// Exactly one of the two arguments will be populated.
-typedef void(^RLMPermissionResultsBlock)(RLMResults<RLMSyncPermission *> * _Nullable, NSError * _Nullable);
+typedef void(^RLMPermissionResultsBlock)(NSArray<RLMSyncPermission *> * _Nullable, NSError * _Nullable);
+
+/// A block type used to asynchronously report results of a permission offerss get operation.
+/// Exactly one of the two arguments will be populated.
+typedef void(^RLMPermissionOfferResultsBlock)(NSArray<RLMSyncPermissionOffer *> * _Nullable, NSError * _Nullable);
 
 /// A block type used to asynchronously report results of a user info retrieval.
 /// Exactly one of the two arguments will be populated.
@@ -391,13 +394,9 @@ NS_SWIFT_UNAVAILABLE("Use the full version of this API.");
  Asynchronously retrieve all permissions associated with the user calling this method.
 
  The results will be returned through the callback block, or an error if the operation failed.
- The callback block will be run on the same thread the method was called on.
-
- @warning This method must be called from a thread with a currently active run loop. Unless
-          you have manually configured a run loop on a side thread, this will usually be the
-          main thread.
+ The callback block will be run on a background thread and not the calling thread.
  */
-- (void)retrievePermissionsWithCallback:(RLMPermissionResultsBlock)callback NS_REFINED_FOR_SWIFT;
+- (void)retrievePermissionsWithCallback:(RLMPermissionResultsBlock)callback;
 
 /**
  Apply a given permission.
@@ -410,17 +409,6 @@ NS_SWIFT_UNAVAILABLE("Use the full version of this API.");
  */
 - (void)applyPermission:(RLMSyncPermission *)permission callback:(RLMPermissionStatusBlock)callback;
 
-/**
- Revoke a given permission.
-
- The operation will take place asynchronously, and the callback will be used to report whether
- the permission change succeeded or failed. The user calling this method must have the right
- to grant the given permission, or else the operation will fail.
-
- @see `RLMSyncPermission`
- */
-- (void)revokePermission:(RLMSyncPermission *)permission callback:(RLMPermissionStatusBlock)callback;
-
 /**
  Create a permission offer for a Realm.
 
@@ -462,6 +450,28 @@ NS_SWIFT_UNAVAILABLE("Use the full version of this API.");
 - (void)acceptOfferForToken:(NSString *)token
                    callback:(RLMPermissionOfferResponseStatusBlock)callback;
 
+/**
+ Revoke a permission offer.
+
+ Pass in a token representing a permission offer which was created by this
+ user. The operation will take place asynchronously. If the operation succeeds,
+ the callback will be passed the URL of the Realm for which the offer was
+ revoked. After this operation completes, the token can no longer be accepted
+ by the recipient.
+
+ @see `createOfferForRealmAtURL:accessLevel:expiration:callback:`
+ */
+- (void)invalidateOfferForToken:(NSString *)token
+                       callback:(RLMPermissionStatusBlock)callback;
+
+/**
+ Asynchronously retrieve all pending permission offers created by the calling user.
+
+ The results will be returned through the callback block, or an error if the operation failed.
+ The callback block will be run on a background thread and not the calling thread.
+ */
+- (void)retrievePermissionOffersWithCallback:(RLMPermissionOfferResultsBlock)callback;
+
 /// :nodoc:
 - (instancetype)init __attribute__((unavailable("RLMSyncUser cannot be created directly")));
 /// :nodoc:
diff --git a/Pods/Realm/include/RLMSyncUser_Private.hpp b/Pods/Realm/include/RLMSyncUser_Private.hpp
index f49a37e..4c414f6 100644
--- a/Pods/Realm/include/RLMSyncUser_Private.hpp
+++ b/Pods/Realm/include/RLMSyncUser_Private.hpp
@@ -68,8 +68,4 @@ class CocoaSyncUserContext : public SyncUserContext {
 + (void)_setUpBindingContextFactory;
 @end
 
-using PermissionChangeCallback = std::function<void(std::exception_ptr)>;
-
-PermissionChangeCallback RLMWrapPermissionStatusCallback(RLMPermissionStatusBlock callback);
-
 NS_ASSUME_NONNULL_END
diff --git a/Pods/Realm/include/RLMSyncUtil.h b/Pods/Realm/include/RLMSyncUtil.h
index 5867d74..222dcb7 100644
--- a/Pods/Realm/include/RLMSyncUtil.h
+++ b/Pods/Realm/include/RLMSyncUtil.h
@@ -188,35 +188,4 @@ typedef RLM_ERROR_ENUM(NSInteger, RLMSyncAuthError, RLMSyncAuthErrorDomain) {
     RLMSyncAuthErrorFileCannotBeShared              = 703,
 };
 
-/**
- An error related to the permissions subsystem.
- */
-typedef RLM_ERROR_ENUM(NSInteger, RLMSyncPermissionError, RLMSyncPermissionErrorDomain) {
-    /**
-     An error that indicates a permission change operation failed. The `userInfo`
-     dictionary contains the underlying error code and a message (if any).
-     */
-    RLMSyncPermissionErrorChangeFailed          = 1,
-
-    /**
-     An error that indicates that attempting to retrieve permissions failed.
-     */
-    RLMSyncPermissionErrorGetFailed             = 2,
-
-    /**
-     An error that indicates that trying to create a permission offer failed.
-     */
-    RLMSyncPermissionErrorOfferFailed           = 3,
-
-    /**
-     An error that indicates that trying to accept a permission offer failed.
-     */
-    RLMSyncPermissionErrorAcceptOfferFailed     = 4,
-
-    /**
-     An error that indicates that an internal error occurred.
-     */
-    RLMSyncPermissionErrorInternal              = 5,
-};
-
 NS_ASSUME_NONNULL_END
diff --git a/Pods/Realm/include/RLMSyncUtil_Private.h b/Pods/Realm/include/RLMSyncUtil_Private.h
index d4c044f..6b2c9c4 100644
--- a/Pods/Realm/include/RLMSyncUtil_Private.h
+++ b/Pods/Realm/include/RLMSyncUtil_Private.h
@@ -45,6 +45,7 @@ NS_ASSUME_NONNULL_BEGIN
 
 extern RLMIdentityProvider const RLMIdentityProviderAccessToken;
 extern RLMIdentityProvider const RLMIdentityProviderRealm;
+extern RLMIdentityProvider const RLMIdentityProviderCustomRefreshToken;
 
 extern NSString *const kRLMSyncAppIDKey;
 extern NSString *const kRLMSyncDataKey;
diff --git a/Pods/Realm/include/RLMSyncUtil_Private.hpp b/Pods/Realm/include/RLMSyncUtil_Private.hpp
index 3ea2130..8e622d1 100644
--- a/Pods/Realm/include/RLMSyncUtil_Private.hpp
+++ b/Pods/Realm/include/RLMSyncUtil_Private.hpp
@@ -40,22 +40,6 @@ std::shared_ptr<realm::SyncSession> sync_session_for_realm(RLMRealm *realm);
 
 CocoaSyncUserContext& context_for(const std::shared_ptr<realm::SyncUser>& user);
 
-#pragma mark - Access level conversion
-
-realm::AccessLevel accessLevelForObjCAccessLevel(RLMSyncAccessLevel level);
-RLMSyncAccessLevel objCAccessLevelForAccessLevel(realm::AccessLevel level);
-
-#pragma mark - Error conversion
-
-typedef enum : NSUInteger {
-    RLMPermissionActionTypeGet,
-    RLMPermissionActionTypeChange,
-    RLMPermissionActionTypeOffer,
-    RLMPermissionActionTypeAcceptOffer,
-} RLMPermissionActionType;
-
-NSError *translateSyncExceptionPtrToError(std::exception_ptr ptr, RLMPermissionActionType type);
-
 #pragma mark - Error construction
 
 NSError *make_auth_error_bad_response(NSDictionary *json=nil);
@@ -63,11 +47,6 @@ NSError *make_auth_error_http_status(NSInteger status);
 NSError *make_auth_error_client_issue();
 NSError *make_auth_error(RLMSyncErrorResponseModel *responseModel);
 
-NSError *make_permission_error_get(NSString *description, realm::util::Optional<NSInteger> code=none);
-NSError *make_permission_error_change(NSString *description, realm::util::Optional<NSInteger> code=none);
-NSError *make_permission_error_offer(NSString *description, realm::util::Optional<NSInteger> code=none);
-NSError *make_permission_error_accept_offer(NSString *description, realm::util::Optional<NSInteger> code=none);
-
 // Set 'code' to NSNotFound to not actually have an error code.
 NSError *make_sync_error(RLMSyncSystemErrorKind kind, NSString *description, NSInteger code, NSDictionary *custom);
 NSError *make_sync_error(NSError *wrapped_auth_error);
diff --git a/Pods/Realm/include/RLMUtil.hpp b/Pods/Realm/include/RLMUtil.hpp
index f567469..6e72dd5 100644
--- a/Pods/Realm/include/RLMUtil.hpp
+++ b/Pods/Realm/include/RLMUtil.hpp
@@ -97,6 +97,8 @@ static inline T RLMCoerceToNil(__unsafe_unretained T obj) {
     return RLMCoerceToNil(static_cast<id>(obj));
 }
 
+id<NSFastEnumeration> RLMAsFastEnumeration(id obj);
+
 // String conversion utilities
 static inline NSString * RLMStringDataToNSString(realm::StringData stringData) {
     static_assert(sizeof(NSUInteger) >= sizeof(size_t),
@@ -175,3 +177,6 @@ id RLMMixedToObjc(realm::Mixed const& value);
 // Given a bundle identifier, return the base directory on the disk within which Realm database and support files should
 // be stored.
 NSString *RLMDefaultDirectoryForBundleIdentifier(NSString *bundleIdentifier);
+
+// Get a NSDateFormatter for ISO8601-formatted strings
+NSDateFormatter *RLMISO8601Formatter();
diff --git a/Pods/Realm/include/RLMSyncPermissionResults.h b/Pods/Realm/include/audit.hpp
similarity index 61%
rename from Pods/Realm/include/RLMSyncPermissionResults.h
rename to Pods/Realm/include/audit.hpp
index 461da2b..81ea76b 100644
--- a/Pods/Realm/include/RLMSyncPermissionResults.h
+++ b/Pods/Realm/include/audit.hpp
@@ -1,6 +1,6 @@
 ////////////////////////////////////////////////////////////////////////////
 //
-// Copyright 2017 Realm Inc.
+// Copyright 2018 Realm Inc.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -16,12 +16,19 @@
 //
 ////////////////////////////////////////////////////////////////////////////
 
-#import <Foundation/Foundation.h>
+namespace realm {
+class Table;
+class TableView;
+template<typename> class BasicRowExpr;
+using RowExpr = BasicRowExpr<Table>;
+struct VersionID;
 
-#import "RLMResults.h"
+class AuditInterface {
+public:
+    virtual ~AuditInterface() {}
 
-@class RLMSyncPermission;
-
-// A private subclass of `RLMResults`.
-@interface RLMSyncPermissionResults : RLMResults<RLMSyncPermission *>
-@end
+    virtual void record_query(realm::VersionID, realm::TableView const&) = 0;
+    virtual void record_read(realm::VersionID, realm::RowExpr) = 0;
+    virtual void record_write(realm::VersionID, realm::VersionID) = 0;
+};
+}
diff --git a/Pods/Realm/include/core/realm/alloc_slab.hpp b/Pods/Realm/include/core/realm/alloc_slab.hpp
index ce20705..e07edea 100644
--- a/Pods/Realm/include/core/realm/alloc_slab.hpp
+++ b/Pods/Realm/include/core/realm/alloc_slab.hpp
@@ -107,6 +107,7 @@ class SlabAlloc : public Allocator {
         bool skip_validate = false;
         bool session_initiator = false;
         bool clear_file = false;
+        bool disable_sync = false;
         const char* encryption_key = nullptr;
     };
 
@@ -164,6 +165,12 @@ class SlabAlloc : public Allocator {
     /// transaction.
     int get_committed_file_format_version() const noexcept;
 
+    bool is_file_on_streaming_form() const
+    {
+        const Header& header = *reinterpret_cast<const Header*>(m_data);
+        return is_file_on_streaming_form(header);
+    }
+
     /// Attach this allocator to an empty buffer.
     ///
     /// It is an error to call this function on an attached
@@ -288,6 +295,23 @@ class SlabAlloc : public Allocator {
     /// call to SlabAlloc::alloc() corresponds to a mutation event.
     bool is_free_space_clean() const noexcept;
 
+    /// Returns the amount of memory requested by calls to SlabAlloc::alloc().
+    size_t get_commit_size() const
+    {
+        return m_commit_size;
+    }
+
+    /// Returns the total amount of memory currently allocated in slab area
+    size_t get_allocated_size() const noexcept;
+
+    /// Returns total amount of slab for all slab allocators
+    static size_t get_total_slab_size() noexcept;
+
+    /// Hooks used to keep the encryption layer informed of the start and stop
+    /// of transactions.
+    void note_reader_start(const void* reader_id);
+    void note_reader_end(const void* reader_id) noexcept;
+
     void verify() const override;
 #ifdef REALM_DEBUG
     void enable_debug(bool enable)
@@ -350,12 +374,24 @@ class SlabAlloc : public Allocator {
     // extend the amount of space available for database node
     // storage. Inter-node references are represented as file offsets
     // (a.k.a. "refs"), and each slab creates an apparently seamless extension
-    // of this file offset addressable space. Slabes are stored as rows in the
+    // of this file offset addressable space. Slabs are stored as rows in the
     // Slabs table in order of ascending file offsets.
     struct Slab {
         ref_type ref_end;
-        char* addr;
+        std::unique_ptr<char[]> addr;
+        size_t size;
+
+        Slab(ref_type r, size_t s);
+        Slab(Slab&& slab)
+            : ref_end(slab.ref_end)
+            , addr(std::move(slab.addr))
+            , size(slab.size)
+        {
+            slab.size = 0;
+        }
+        ~Slab();
     };
+
     struct Chunk { // describes a freed in-file block
         ref_type ref;
         size_t size;
@@ -370,52 +406,63 @@ class SlabAlloc : public Allocator {
     // Each slab (area obtained from the underlying system) has a terminating BetweenBlocks
     // at the beginning and at the end of the Slab.
     struct FreeBlock {
-    	ref_type ref; // ref for this entry. Saves a reverse translate / representing links as refs
-    	FreeBlock* prev; // circular doubly linked list
-    	FreeBlock* next;
-    	void clear_links() { prev = next = nullptr; }
-    	void unlink();
+        ref_type ref;    // ref for this entry. Saves a reverse translate / representing links as refs
+        FreeBlock* prev; // circular doubly linked list
+        FreeBlock* next;
+        void clear_links()
+        {
+            prev = next = nullptr;
+        }
+        void unlink();
     };
     struct BetweenBlocks { // stores sizes and used/free status of blocks before and after.
-    	int32_t block_before_size; // negated if block is in use,
-    	int32_t block_after_size;  // positive if block is free - and zero at end
+        int32_t block_before_size; // negated if block is in use,
+        int32_t block_after_size;  // positive if block is free - and zero at end
     };
 
+    Config m_cfg;
     using FreeListMap = std::map<int, FreeBlock*>;  // log(N) addressing for larger blocks
     FreeListMap m_block_map;
 
     // abstract notion of a freelist - used to hide whether a freelist
     // is residing in the small blocks or the large blocks structures.
     struct FreeList {
-    	int size = 0; // size of every element in the list, 0 if not found
-    	FreeListMap::iterator it;
-    	bool found_something() { return size != 0; }
-    	bool found_exact(int sz) { return size == sz; }
+        int size = 0; // size of every element in the list, 0 if not found
+        FreeListMap::iterator it;
+        bool found_something()
+        {
+            return size != 0;
+        }
+        bool found_exact(int sz)
+        {
+            return size == sz;
+        }
     };
 
     // simple helper functions for accessing/navigating blocks and betweenblocks (TM)
     BetweenBlocks* bb_before(FreeBlock* entry) const {
-    	return reinterpret_cast<BetweenBlocks*>(entry) - 1;
+        return reinterpret_cast<BetweenBlocks*>(entry) - 1;
     }
     BetweenBlocks* bb_after(FreeBlock* entry) const {
-    	auto bb = bb_before(entry);
-    	size_t sz = bb->block_after_size;
-    	char* addr = reinterpret_cast<char*>(entry) + sz;
-    	return reinterpret_cast<BetweenBlocks*>(addr);
+        auto bb = bb_before(entry);
+        size_t sz = bb->block_after_size;
+        char* addr = reinterpret_cast<char*>(entry) + sz;
+        return reinterpret_cast<BetweenBlocks*>(addr);
     }
     FreeBlock* block_before(BetweenBlocks* bb) const {
-    	size_t sz = bb->block_before_size;
-    	if (sz <= 0) return nullptr; // only blocks that are not in use
-    	char* addr = reinterpret_cast<char*>(bb) - sz;
-    	return reinterpret_cast<FreeBlock*>(addr);
+        size_t sz = bb->block_before_size;
+        if (sz <= 0)
+            return nullptr; // only blocks that are not in use
+        char* addr = reinterpret_cast<char*>(bb) - sz;
+        return reinterpret_cast<FreeBlock*>(addr);
     }
     FreeBlock* block_after(BetweenBlocks* bb) const {
-    	if (bb->block_after_size <= 0)
-    		return nullptr;
-    	return reinterpret_cast<FreeBlock*>(bb + 1);
+        if (bb->block_after_size <= 0)
+            return nullptr;
+        return reinterpret_cast<FreeBlock*>(bb + 1);
     }
     int size_from_block(FreeBlock* entry) const {
-    	return bb_before(entry)->block_after_size;
+        return bb_before(entry)->block_after_size;
     }
     void mark_allocated(FreeBlock* entry);
     // mark the entry freed in bordering BetweenBlocks. Also validate size.
@@ -444,7 +491,7 @@ class SlabAlloc : public Allocator {
     // create a single free chunk with "BetweenBlocks" at both ends and a
     // single free chunk between them. This free chunk will be of size:
     //   slab_size - 2 * sizeof(BetweenBlocks)
-    FreeBlock* slab_to_entry(Slab slab, ref_type ref_start);
+    FreeBlock* slab_to_entry(const Slab& slab, ref_type ref_start);
 
     // breaking/merging of blocks
     FreeBlock* get_prev_block_if_mergeable(FreeBlock* block);
@@ -518,10 +565,11 @@ class SlabAlloc : public Allocator {
     /// less padding between members due to alignment requirements.
     FeeeSpaceState m_free_space_state = free_space_Clean;
 
-    typedef std::vector<Slab> slabs;
+    typedef std::vector<Slab> Slabs;
     using Chunks = std::map<ref_type, size_t>;
-    slabs m_slabs;
+    Slabs m_slabs;
     Chunks m_free_read_only;
+    size_t m_commit_size = 0;
 
     bool m_debug_out = false;
     struct hash_entry {
@@ -548,6 +596,9 @@ class SlabAlloc : public Allocator {
     /// if the buffer contains a file in streaming form
     static ref_type get_top_ref(const char* data, size_t len);
 
+    // Gets the path of the attached file, or other relevant debugging info.
+    std::string get_file_path_for_assertions() const;
+
     class ChunkRefEq;
     class ChunkRefEndEq;
     class SlabRefEndEq;
@@ -665,28 +716,28 @@ inline size_t SlabAlloc::get_section_base(size_t index) const noexcept
 template<typename Func>
 void SlabAlloc::for_all_free_entries(Func f) const
 {
-	ref_type ref = m_baseline;
-	for (auto& e : m_slabs) {
-		BetweenBlocks* bb = reinterpret_cast<BetweenBlocks*>(e.addr);
-		REALM_ASSERT(bb->block_before_size == 0);
-		while (1) {
-			int size = bb->block_after_size;
-			f(ref, sizeof(BetweenBlocks));
-			ref += sizeof(BetweenBlocks);
-			if (size == 0) {
-				break;
-			}
-			if (size > 0) { // freeblock.
-				f(ref, size);
-				bb = reinterpret_cast<BetweenBlocks*>(reinterpret_cast<char*>(bb) + sizeof(BetweenBlocks) + size);
-				ref += size;
-			}
-			else {
-				bb = reinterpret_cast<BetweenBlocks*>(reinterpret_cast<char*>(bb) + sizeof(BetweenBlocks) - size);
-				ref -= size;
-			}
-		}
-	}
+    ref_type ref = m_baseline;
+    for (auto& e : m_slabs) {
+        BetweenBlocks* bb = reinterpret_cast<BetweenBlocks*>(e.addr.get());
+        REALM_ASSERT(bb->block_before_size == 0);
+        while (1) {
+            int size = bb->block_after_size;
+            f(ref, sizeof(BetweenBlocks));
+            ref += sizeof(BetweenBlocks);
+            if (size == 0) {
+                break;
+            }
+            if (size > 0) { // freeblock.
+                f(ref, size);
+                bb = reinterpret_cast<BetweenBlocks*>(reinterpret_cast<char*>(bb) + sizeof(BetweenBlocks) + size);
+                ref += size;
+            }
+            else {
+                bb = reinterpret_cast<BetweenBlocks*>(reinterpret_cast<char*>(bb) + sizeof(BetweenBlocks) - size);
+                ref -= size;
+            }
+        }
+    }
 }
 
 } // namespace realm
diff --git a/Pods/Realm/include/core/realm/array.hpp b/Pods/Realm/include/core/realm/array.hpp
index e0c2684..a948943 100644
--- a/Pods/Realm/include/core/realm/array.hpp
+++ b/Pods/Realm/include/core/realm/array.hpp
@@ -2219,17 +2219,38 @@ bool Array::find_optimized(int64_t value, size_t start, size_t end, size_t basei
         end = nullable_array ? size() - 1 : size();
 
     if (nullable_array) {
-        // We were called by find() of a nullable array. So skip first entry, take nulls in count, etc, etc. Fixme:
-        // Huge speed optimizations are possible here! This is a very simple generic method.
-        for (; start2 < end; start2++) {
-            int64_t v = get<bitwidth>(start2 + 1);
-            if (c(v, value, v == get(0), find_null)) {
-                util::Optional<int64_t> v2(v == get(0) ? util::none : util::make_optional(v));
-                if (!find_action<action, Callback>(start2 + baseindex, v2, state, callback))
-                    return false; // tell caller to stop aggregating/search
+        if (std::is_same<cond, Equal>::value) {
+            // In case of Equal it is safe to use the optimized logic. We just have to fetch the null value
+            // if this is what we are looking for. And we have to adjust the indexes to compensate for the
+            // null value at position 0.
+            if (find_null) {
+                value = get(0);
             }
+            else {
+                // If the value to search for is equal to the null value, the value cannot be in the array
+                if (value == get(0)) {
+                    return true;
+                }
+            }
+            start2++;
+            end++;
+            baseindex--;
+        }
+        else {
+            // We were called by find() of a nullable array. So skip first entry, take nulls in count, etc, etc. Fixme:
+            // Huge speed optimizations are possible here! This is a very simple generic method.
+            auto null_value = get(0);
+            for (; start2 < end; start2++) {
+                int64_t v = get<bitwidth>(start2 + 1);
+                bool value_is_null = (v == null_value);
+                if (c(v, value, value_is_null, find_null)) {
+                    util::Optional<int64_t> v2(value_is_null ? util::none : util::make_optional(v));
+                    if (!find_action<action, Callback>(start2 + baseindex, v2, state, callback))
+                        return false; // tell caller to stop aggregating/search
+                }
+            }
+            return true; // tell caller to continue aggregating/search (on next array leafs)
         }
-        return true; // tell caller to continue aggregating/search (on next array leafs)
     }
 
 
@@ -2687,7 +2708,7 @@ inline bool Array::compare_equality(int64_t value, size_t start, size_t end, siz
                 if (a >= 64 / no0(width))
                     break;
 
-                if (!find_action<action, Callback>(a + start + baseindex, get<width>(start + t), state, callback))
+                if (!find_action<action, Callback>(a + start + baseindex, get<width>(start + a), state, callback))
                     return false;
                 v2 >>= (t + 1) * width;
                 a += 1;
@@ -2929,33 +2950,36 @@ bool Array::compare_leafs_4(const Array* foreign, size_t start, size_t end, size
 #if defined(REALM_COMPILER_SSE)
     if (sseavx<42>() && width == foreign_width && (width == 8 || width == 16 || width == 32)) {
         // We can only use SSE if both bitwidths are equal and above 8 bits and all values are signed
-        while (start < end && (((reinterpret_cast<size_t>(m_data) & 0xf) * 8 + start * width) % (128) != 0)) {
-            int64_t v = get_universal<width>(m_data, start);
-            int64_t fv = get_universal<foreign_width>(foreign_m_data, start);
-            if (c(v, fv)) {
-                if (!find_action<action, Callback>(start + baseindex, v, state, callback))
-                    return false;
+        // and the two arrays are aligned the same way
+        if ((reinterpret_cast<size_t>(m_data) & 0xf) == (reinterpret_cast<size_t>(foreign_m_data) & 0xf)) {
+            while (start < end && (((reinterpret_cast<size_t>(m_data) & 0xf) * 8 + start * width) % (128) != 0)) {
+                int64_t v = get_universal<width>(m_data, start);
+                int64_t fv = get_universal<foreign_width>(foreign_m_data, start);
+                if (c(v, fv)) {
+                    if (!find_action<action, Callback>(start + baseindex, v, state, callback))
+                        return false;
+                }
+                start++;
             }
-            start++;
-        }
-        if (start == end)
-            return true;
+            if (start == end)
+                return true;
 
 
-        size_t sse_items = (end - start) * width / 128;
-        size_t sse_end = start + sse_items * 128 / no0(width);
+            size_t sse_items = (end - start) * width / 128;
+            size_t sse_end = start + sse_items * 128 / no0(width);
 
-        while (start < sse_end) {
-            __m128i* a = reinterpret_cast<__m128i*>(m_data + start * width / 8);
-            __m128i* b = reinterpret_cast<__m128i*>(foreign_m_data + start * width / 8);
+            while (start < sse_end) {
+                __m128i* a = reinterpret_cast<__m128i*>(m_data + start * width / 8);
+                __m128i* b = reinterpret_cast<__m128i*>(foreign_m_data + start * width / 8);
 
-            bool continue_search =
-                find_sse_intern<cond, action, width, Callback>(a, b, 1, state, baseindex + start, callback);
+                bool continue_search =
+                    find_sse_intern<cond, action, width, Callback>(a, b, 1, state, baseindex + start, callback);
 
-            if (!continue_search)
-                return false;
+                if (!continue_search)
+                    return false;
 
-            start += 128 / no0(width);
+                start += 128 / no0(width);
+            }
         }
     }
 #endif
diff --git a/Pods/Realm/include/core/realm/array_string.hpp b/Pods/Realm/include/core/realm/array_string.hpp
index bbf3203..a533f32 100644
--- a/Pods/Realm/include/core/realm/array_string.hpp
+++ b/Pods/Realm/include/core/realm/array_string.hpp
@@ -54,6 +54,7 @@ class ArrayString : public Array {
     bool is_null(size_t ndx) const;
     void set_null(size_t ndx);
     StringData get(size_t ndx) const noexcept;
+    StringData get_string(size_t ndx) const noexcept { return get(ndx); }
     void add();
     void add(StringData value);
     void set(size_t ndx, StringData value);
diff --git a/Pods/Realm/include/core/realm/array_string_long.hpp b/Pods/Realm/include/core/realm/array_string_long.hpp
index 8f5878d..b03d8b4 100644
--- a/Pods/Realm/include/core/realm/array_string_long.hpp
+++ b/Pods/Realm/include/core/realm/array_string_long.hpp
@@ -57,6 +57,7 @@ class ArrayStringLong : public Array {
     size_t size() const noexcept;
 
     StringData get(size_t ndx) const noexcept;
+    StringData get_string(size_t ndx) const noexcept { return get(ndx); }
 
 
     void add(StringData value);
diff --git a/Pods/Realm/include/core/realm/column_binary.hpp b/Pods/Realm/include/core/realm/column_binary.hpp
index 7802e03..48e1d11 100644
--- a/Pods/Realm/include/core/realm/column_binary.hpp
+++ b/Pods/Realm/include/core/realm/column_binary.hpp
@@ -101,6 +101,12 @@ class BinaryColumn : public ColumnBaseSimple {
     void verify() const override;
     void to_dot(std::ostream&, StringData title) const override;
     void do_dump_node_structure(std::ostream&, int) const override;
+    void find_all(IntegerColumn&, BinaryData, size_t, size_t) const
+    {
+        // Dummy implementation
+        REALM_ASSERT(false);
+    }
+
 
 private:
     /// \param row_ndx Must be `realm::npos` if appending.
diff --git a/Pods/Realm/include/core/realm/column_timestamp.hpp b/Pods/Realm/include/core/realm/column_timestamp.hpp
index d5c4859..0cc6d07 100644
--- a/Pods/Realm/include/core/realm/column_timestamp.hpp
+++ b/Pods/Realm/include/core/realm/column_timestamp.hpp
@@ -83,6 +83,9 @@ class TimestampColumn : public ColumnBaseSimple {
     void to_dot(std::ostream&, StringData title = StringData()) const override;
     void do_dump_node_structure(std::ostream&, int level) const override;
     void leaf_to_dot(MemRef, ArrayParent*, size_t ndx_in_parent, std::ostream&) const override;
+    void get_seconds_leaf(size_t ndx, size_t& ndx_in_leaf,
+                          BpTree<util::Optional<int64_t>>::LeafInfo& inout_leaf) const noexcept;
+    void get_nanoseconds_leaf(size_t ndx, size_t& ndx_in_leaf, BpTree<int64_t>::LeafInfo& inout_leaf) const noexcept;
 
     void add(const Timestamp& ts = Timestamp{});
     Timestamp get(size_t row_ndx) const noexcept;
@@ -110,6 +113,15 @@ class TimestampColumn : public ColumnBaseSimple {
         return npos;
     }
 
+    void find_all(IntegerColumn& result, Timestamp value, size_t begin, size_t end) const
+    {
+        if (m_search_index && begin == 0 && end == npos) {
+            m_search_index->find_all(result, value); // Throws
+            return;
+        }
+        REALM_ASSERT(false);
+    }
+
     typedef Timestamp value_type;
 
 private:
diff --git a/Pods/Realm/include/core/realm/column_type_traits.hpp b/Pods/Realm/include/core/realm/column_type_traits.hpp
index 39a3208..78441de 100644
--- a/Pods/Realm/include/core/realm/column_type_traits.hpp
+++ b/Pods/Realm/include/core/realm/column_type_traits.hpp
@@ -98,6 +98,13 @@ struct ColumnTypeTraits<OldDateTime> : ColumnTypeTraits<int64_t> {
     static const ColumnType column_id = col_type_OldDateTime;
 };
 
+template <>
+struct ColumnTypeTraits<Timestamp> {
+    using column_type = TimestampColumn;
+    static const DataType id = type_Timestamp;
+    static const ColumnType column_id = col_type_Timestamp;
+};
+
 template <>
 struct ColumnTypeTraits<util::Optional<OldDateTime>> : ColumnTypeTraits<util::Optional<int64_t>> {
     static const DataType id = type_OldDateTime;
@@ -106,6 +113,7 @@ struct ColumnTypeTraits<util::Optional<OldDateTime>> : ColumnTypeTraits<util::Op
 
 template <>
 struct ColumnTypeTraits<StringData> {
+    using column_type = StringColumn;
     static const DataType id = type_String;
     static const ColumnType column_id = col_type_String;
 };
diff --git a/Pods/Realm/include/core/realm/data_type.hpp b/Pods/Realm/include/core/realm/data_type.hpp
index 859d1cf..37e8a1b 100644
--- a/Pods/Realm/include/core/realm/data_type.hpp
+++ b/Pods/Realm/include/core/realm/data_type.hpp
@@ -25,6 +25,7 @@ namespace realm {
 
 class StringData;
 class BinaryData;
+class Timestamp;
 
 typedef int64_t Int;
 typedef bool Bool;
@@ -32,6 +33,7 @@ typedef float Float;
 typedef double Double;
 typedef realm::StringData String;
 typedef realm::BinaryData Binary;
+typedef realm::Timestamp Timestamp;
 
 
 // Note: Value assignments must be kept in sync with <realm/column_type.h>
diff --git a/Pods/Realm/include/core/realm/exceptions.hpp b/Pods/Realm/include/core/realm/exceptions.hpp
index 3ddf607..7db8d18 100644
--- a/Pods/Realm/include/core/realm/exceptions.hpp
+++ b/Pods/Realm/include/core/realm/exceptions.hpp
@@ -102,13 +102,26 @@ class OutOfDiskSpace : public std::runtime_error {
     /// runtime_error::what() returns the msg provided in the constructor.
 };
 
-
-class SerialisationError : public ExceptionWithBacktrace<std::runtime_error> {
+// SerialisationError intentionally does not inherit ExceptionWithBacktrace
+// because the query-based-sync permissions queries generated on the server
+// use a LinksToNode which is not currently serialisable (this limitation can
+// be lifted in core 6 given stable ids). Coupled with query metrics which
+// serialize all queries, the capturing of the stack for these frequent
+// permission queries shows up in performance profiles.
+class SerialisationError : public std::runtime_error {
 public:
     SerialisationError(const std::string& msg);
     /// runtime_error::what() returns the msg provided in the constructor.
 };
 
+// thrown when a user constructed link path is not a valid input
+class InvalidPathError : public std::runtime_error {
+public:
+    InvalidPathError(const std::string& msg);
+    /// runtime_error::what() returns the msg provided in the constructor.
+};
+
+
 /// The \c LogicError exception class is intended to be thrown only when
 /// applications (or bindings) violate rules that are stated (or ought to have
 /// been stated) in the documentation of the public API, and only in cases
@@ -299,7 +312,12 @@ inline OutOfDiskSpace::OutOfDiskSpace(const std::string& msg)
 }
 
 inline SerialisationError::SerialisationError(const std::string& msg)
-    : ExceptionWithBacktrace<std::runtime_error>(msg)
+    : std::runtime_error(msg)
+{
+}
+
+inline InvalidPathError::InvalidPathError(const std::string& msg)
+    : runtime_error(msg)
 {
 }
 
diff --git a/Pods/Realm/include/core/realm/group.hpp b/Pods/Realm/include/core/realm/group.hpp
index f98787a..3386c6a 100644
--- a/Pods/Realm/include/core/realm/group.hpp
+++ b/Pods/Realm/include/core/realm/group.hpp
@@ -380,7 +380,8 @@ class Group : private Table::Parent {
     /// types that are derived from util::File::AccessError, the
     /// derived exception type is thrown. In particular,
     /// util::File::Exists will be thrown if the file exists already.
-    void write(const std::string& file, const char* encryption_key = nullptr, uint64_t version = 0) const;
+    void write(const std::string& file, const char* encryption_key = nullptr, uint64_t version = 0,
+               bool write_history = true) const;
 
     /// Write this database to a memory buffer.
     ///
@@ -695,8 +696,8 @@ class Group : private Table::Parent {
 
     void mark_all_table_accessors() noexcept;
 
-    void write(util::File& file, const char* encryption_key, uint_fast64_t version_number) const;
-    void write(std::ostream&, bool pad, uint_fast64_t version_numer) const;
+    void write(util::File& file, const char* encryption_key, uint_fast64_t version_number, bool write_history) const;
+    void write(std::ostream&, bool pad, uint_fast64_t version_numer, bool write_history) const;
 
     Replication* get_replication() const noexcept;
     void set_replication(Replication*) noexcept;
@@ -796,6 +797,7 @@ class Group : private Table::Parent {
     void set_history_schema_version(int version);
     void set_history_parent(Array& history_root) noexcept;
     void prepare_history_parent(Array& history_root, int history_type, int history_schema_version);
+    static void validate_top_array(const Array& arr, const SlabAlloc& alloc);
 
     friend class Table;
     friend class GroupWriter;
diff --git a/Pods/Realm/include/core/realm/group_shared.hpp b/Pods/Realm/include/core/realm/group_shared.hpp
index f167440..e607409 100644
--- a/Pods/Realm/include/core/realm/group_shared.hpp
+++ b/Pods/Realm/include/core/realm/group_shared.hpp
@@ -369,8 +369,11 @@ class SharedGroup {
     // by compact(). This may not correspond to the space which is free
     // at the point where get_stats() is called, since that will include
     // memory required to hold older versions of data, which still
-    // needs to be available.
-    void get_stats(size_t& free_space, size_t& used_space);
+    // needs to be available. The locked space is the amount of memory
+    // that is free in current version, but being used in still live versions.
+    // Notice that we will always have two live versions - the current and the
+    // previous.
+    void get_stats(size_t& free_space, size_t& used_space, util::Optional<size_t&> locked_space = util::none) const;
     //@}
 
     enum TransactStage {
@@ -391,6 +394,15 @@ class SharedGroup {
     /// a read transaction will not immediately release any versions.
     uint_fast64_t get_number_of_versions();
 
+    /// Get the approximate size of the data that would be written to the file if
+    /// a commit were done at this point. The reported size will always be bigger
+    /// than what will eventually be needed as we reserve a bit more memory that
+    /// will be needed.
+    size_t get_commit_size() const;
+
+    /// Get the size of the currently allocated slab area
+    size_t get_allocated_size() const;
+
     /// Compact the database file.
     /// - The method will throw if called inside a transaction.
     /// - The method will throw if called in unattached state.
@@ -533,9 +545,7 @@ class SharedGroup {
     // Release pinned version (not thread safe)
     void unpin_version(VersionID version);
 
-#if REALM_METRICS
     std::shared_ptr<metrics::Metrics> get_metrics();
-#endif // REALM_METRICS
 
     // Try to grab a exclusive lock of the given realm path's lock file. If the lock
     // can be acquired, the callback will be executed with the lock and then return true.
@@ -567,6 +577,7 @@ class SharedGroup {
 
     // Member variables
     size_t m_free_space = 0;
+    size_t m_locked_space = 0;
     size_t m_used_space = 0;
     Group m_group;
     ReadLockInfo m_read_lock;
@@ -694,9 +705,13 @@ class SharedGroup {
 };
 
 
-inline void SharedGroup::get_stats(size_t& free_space, size_t& used_space) {
+inline void SharedGroup::get_stats(size_t& free_space, size_t& used_space, util::Optional<size_t&> locked_space) const
+{
     free_space = m_free_space;
     used_space = m_used_space;
+    if (locked_space) {
+        *locked_space = m_locked_space;
+    }
 }
 
 
@@ -963,11 +978,14 @@ inline void SharedGroup::advance_read(O* observer, VersionID version_id)
     if (version_id.version < m_read_lock.m_version)
         throw LogicError(LogicError::bad_version);
 
-    _impl::History* hist = get_history(); // Throws
+    Replication* repl = m_group.get_replication();
+    _impl::History* hist = repl ? repl->get_history() : nullptr; // Throws
+
     if (!hist)
         throw LogicError(LogicError::no_history);
 
-    do_advance_read(observer, version_id, *hist); // Throws
+    bool hist_updated = do_advance_read(observer, version_id, *hist); // Throws
+    repl->initiate_transact(Replication::TransactionType::trans_Read, version_id.version, hist_updated);
 }
 
 template <class O>
@@ -988,7 +1006,8 @@ inline void SharedGroup::promote_to_write(O* observer)
         Replication* repl = m_group.get_replication();
         REALM_ASSERT(repl); // Presence of `repl` follows from the presence of `hist`
         version_type current_version = m_read_lock.m_version;
-        repl->initiate_transact(current_version, history_updated); // Throws
+        repl->initiate_transact(Replication::TransactionType::trans_Write, current_version,
+                                history_updated); // Throws
 
         // If the group has no top array (top_ref == 0), create a new node
         // structure for an empty group now, to be ready for modifications. See
@@ -1056,7 +1075,7 @@ inline bool SharedGroup::do_advance_read(O* observer, VersionID version_id, _imp
     REALM_ASSERT(new_read_lock.m_version >= m_read_lock.m_version);
     if (new_read_lock.m_version == m_read_lock.m_version) {
         release_read_lock(new_read_lock);
-        // _impl::History::update_early_from_top_ref() was not called
+        // _impl::History::update_from_ref() was not called
         return false;
     }
 
@@ -1064,13 +1083,13 @@ inline bool SharedGroup::do_advance_read(O* observer, VersionID version_id, _imp
     {
         version_type new_version = new_read_lock.m_version;
         size_t new_file_size = new_read_lock.m_file_size;
-        ref_type new_top_ref = new_read_lock.m_top_ref;
 
         // Synchronize readers view of the file
         SlabAlloc& alloc = m_group.m_alloc;
         alloc.update_reader_view(new_file_size);
 
-        hist.update_early_from_top_ref(new_version, new_file_size, new_top_ref); // Throws
+        ref_type hist_ref = _impl::GroupFriend::get_history_ref(alloc, new_read_lock.m_top_ref);
+        hist.update_from_ref_and_version(hist_ref, new_version); // Throws
     }
 
     if (observer) {
diff --git a/Pods/Realm/include/core/realm/group_shared_options.hpp b/Pods/Realm/include/core/realm/group_shared_options.hpp
index 75d5bda..73f7d3e 100644
--- a/Pods/Realm/include/core/realm/group_shared_options.hpp
+++ b/Pods/Realm/include/core/realm/group_shared_options.hpp
@@ -31,20 +31,22 @@ struct SharedGroupOptions {
     enum class Durability : uint16_t {
         Full,
         MemOnly,
-        Async ///< Not yet supported on windows.
+        Async, ///< Not yet supported on windows.
+        Unsafe  // If you use this, you loose ACID property
     };
 
     explicit SharedGroupOptions(Durability level = Durability::Full, const char* key = nullptr,
                                 bool allow_upgrade = true,
                                 std::function<void(int, int)> file_upgrade_callback = std::function<void(int, int)>(),
-                                std::string temp_directory = sys_tmp_dir,
-                                bool track_metrics = false)
+                                std::string temp_directory = sys_tmp_dir, bool track_metrics = false,
+                                size_t metrics_history_size = 10000)
         : durability(level)
         , encryption_key(key)
         , allow_file_format_upgrade(allow_upgrade)
         , upgrade_callback(file_upgrade_callback)
         , temp_dir(temp_directory)
         , enable_metrics(track_metrics)
+        , metrics_buffer_size(metrics_history_size)
 
     {
     }
@@ -56,6 +58,7 @@ struct SharedGroupOptions {
         , upgrade_callback(std::function<void(int, int)>())
         , temp_dir(sys_tmp_dir)
         , enable_metrics(false)
+        , metrics_buffer_size(10000)
     {
     }
 
@@ -95,6 +98,10 @@ struct SharedGroupOptions {
     /// A prerequisite is compiling with REALM_METRICS=ON.
     bool enable_metrics;
 
+    /// The maximum number of entries stored by the metrics (if enabled). If this number
+    /// is exceeded without being consumed, only the most recent entries will be stored.
+    size_t metrics_buffer_size;
+
     /// sys_tmp_dir will be used if the temp_dir is empty when creating SharedGroupOptions.
     /// It must be writable and allowed to create pipe/fifo file on it.
     /// set_sys_tmp_dir is not a thread-safe call and it is only supposed to be called once
diff --git a/Pods/Realm/include/core/realm/group_writer.hpp b/Pods/Realm/include/core/realm/group_writer.hpp
index 75f3baf..5721a3e 100644
--- a/Pods/Realm/include/core/realm/group_writer.hpp
+++ b/Pods/Realm/include/core/realm/group_writer.hpp
@@ -27,6 +27,7 @@
 #include <realm/alloc.hpp>
 #include <realm/impl/array_writer.hpp>
 #include <realm/array_integer.hpp>
+#include <realm/group_shared_options.hpp>
 
 
 namespace realm {
@@ -51,7 +52,8 @@ class GroupWriter : public _impl::ArrayWriterBase {
     // (Group::m_is_shared), the constructor also adds version tracking
     // information to the group, if it is not already present (6th and 7th entry
     // in Group::m_top).
-    GroupWriter(Group&);
+    using Durability = SharedGroupOptions::Durability;
+    GroupWriter(Group&, Durability dura = Durability::Full);
     ~GroupWriter();
 
     void set_versions(uint64_t current, uint64_t read_lock) noexcept;
@@ -69,20 +71,22 @@ class GroupWriter : public _impl::ArrayWriterBase {
 
     size_t get_file_size() const noexcept;
 
-    /// Write the specified chunk into free space.
-    void write(const char* data, size_t size);
-
     ref_type write_array(const char*, size_t, uint32_t) override;
 
 #ifdef REALM_DEBUG
     void dump();
 #endif
 
-    size_t get_free_space_size()
+    size_t get_free_space_size() const
     {
         return m_free_space_size;
     }
 
+    size_t get_locked_space_size() const
+    {
+        return m_locked_space_size;
+    }
+
 private:
     class MapWindow;
     Group& m_group;
@@ -90,10 +94,12 @@ class GroupWriter : public _impl::ArrayWriterBase {
     ArrayInteger m_free_positions; // 4th slot in Group::m_top
     ArrayInteger m_free_lengths;   // 5th slot in Group::m_top
     ArrayInteger m_free_versions;  // 6th slot in Group::m_top
-    uint64_t m_current_version;
+    uint64_t m_current_version = 0;
     uint64_t m_readlock_version;
     size_t m_window_alignment;
-    size_t m_free_space_size;
+    size_t m_free_space_size = 0;
+    size_t m_locked_space_size = 0;
+    Durability m_durability;
 
     struct FreeSpaceEntry {
         FreeSpaceEntry(size_t r, size_t s, uint64_t v)
@@ -106,16 +112,21 @@ class GroupWriter : public _impl::ArrayWriterBase {
         size_t size;
         uint64_t released_at_version;
     };
-    std::vector<FreeSpaceEntry> m_free_in_file;
+    class FreeList : public std::vector<FreeSpaceEntry> {
+    public:
+        FreeList() = default;
+        // Merge adjacent chunks
+        void merge_adjacent_entries_in_freelist();
+        // Copy free space entries to structure where entries are sorted by size
+        void move_free_in_file_to_size_map(std::multimap<size_t, size_t>& size_map);
+    };
+    //  m_free_in_file;
     std::vector<FreeSpaceEntry> m_not_free_in_file;
     std::multimap<size_t, size_t> m_size_map;
     using FreeListElement = std::multimap<size_t, size_t>::iterator;
 
-    void sort_freelist();
-    // Merge adjacent chunks
-    void merge_adjacent_entries_in_freelist();
     void read_in_freelist();
-    size_t recreate_freelist(size_t reserve_pos, size_t& free_space_size);
+    size_t recreate_freelist(size_t reserve_pos);
     // Currently cached memory mappings. We keep as many as 16 1MB windows
     // open for writing. The allocator will favor sequential allocation
     // from a modest number of windows, depending upon fragmentation, so
@@ -133,9 +144,6 @@ class GroupWriter : public _impl::ArrayWriterBase {
     // Sync all cached memory mappings
     void sync_all_mappings();
 
-    // Copy free space entries to structure where entries are sorted by size
-    void move_free_in_file_to_size_map();
-
     /// Allocate a chunk of free space of the specified size. The
     /// specified size must be 8-byte aligned. Extend the file if
     /// required. The returned chunk is removed from the amount of
diff --git a/Pods/Realm/include/core/realm/handover_defs.hpp b/Pods/Realm/include/core/realm/handover_defs.hpp
index ad57b5c..cd8be27 100644
--- a/Pods/Realm/include/core/realm/handover_defs.hpp
+++ b/Pods/Realm/include/core/realm/handover_defs.hpp
@@ -57,15 +57,24 @@ struct QueryHandoverPatch {
     QueryNodeHandoverPatches m_node_data;
 };
 
-enum class DescriptorType {
-    Sort,
-    Distinct,
-    Limit
+enum class DescriptorType { Sort, Distinct, Limit, Include };
+
+struct DescriptorLinkPath {
+    DescriptorLinkPath(size_t column_index, size_t table_index, bool column_is_backlink)
+        : col_ndx(column_index)
+        , table_ndx(table_index)
+        , is_backlink(column_is_backlink)
+    {
+    }
+
+    size_t col_ndx;
+    size_t table_ndx;
+    bool is_backlink = false;
 };
 
 struct DescriptorExport {
     DescriptorType type;
-    std::vector<std::vector<size_t>> columns;
+    std::vector<std::vector<DescriptorLinkPath>> columns;
     std::vector<bool> ordering;
     size_t limit;
 };
diff --git a/Pods/Realm/include/core/realm/impl/cont_transact_hist.hpp b/Pods/Realm/include/core/realm/impl/cont_transact_hist.hpp
index 4aa07dd..deb0f8b 100644
--- a/Pods/Realm/include/core/realm/impl/cont_transact_hist.hpp
+++ b/Pods/Realm/include/core/realm/impl/cont_transact_hist.hpp
@@ -37,34 +37,16 @@ class History {
 public:
     using version_type = VersionID::version_type;
 
-    /// May be called during a read transaction to gain early access to the
-    /// history as it appears in a new snapshot that succeeds the one bound in
-    /// the current read transaction.
-    ///
-    /// May also be called at other times as long as the caller owns a read lock
-    /// (SharedGroup::grab_read_lock()) on the Realm for the specified file size
-    /// and top ref, and the allocator is in a 'free space clean' state
-    /// (SlabAlloc::is_free_space_clean()).
-    ///
-    /// This function may cause a remapping of the Realm file
-    /// (SlabAlloc::remap()) if it needs to make the new snapshot fully visible
-    /// in memory.
+    virtual ~History() noexcept {}
+
+    /// May be called during any transaction
     ///
-    /// Note that this method of gaining early access to the history in a new
-    /// snapshot only gives read access. It does not allow for modifications of
-    /// the history or any other part of the new snapshot. For modifications to
-    /// be allowed, `Group::m_top` (the parent of the history) would first have
-    /// to be updated to reflect the new snapshot, but at that time we are no
-    /// longer in an 'early access' situation.
+    /// It is a precondition for calls to this function that the reader view is
+    /// updated - that is, the mapping is updated to provide full visibility to
+    /// the file.
     ///
-    /// This is not a problem from the point of view of this history interface,
-    /// as it only contains methods for reading from the history, but some
-    /// implementations will want to also provide for ways to modify the
-    /// history, but in those cases, modifications must occur only after the
-    /// Group accessor has been fully updated to reflect the new snapshot.
-    virtual void update_early_from_top_ref(version_type new_version, size_t new_file_size, ref_type new_top_ref) = 0;
-
-    virtual void update_from_parent(version_type current_version) = 0;
+    virtual void update_from_ref_and_version(ref_type ref, version_type version) = 0;
+    virtual void update_from_parent(version_type version) = 0;
 
     /// Get all changesets between the specified versions. References to those
     /// changesets will be made available in successive entries of `buffer`. The
@@ -142,9 +124,21 @@ class History {
 
     virtual void verify() const = 0;
 
-    virtual ~History() noexcept
+    void set_updated(bool updated)
     {
+        m_updated = updated;
     }
+
+    void ensure_updated(version_type version) const
+    {
+        if (!m_updated) {
+            const_cast<History*>(this)->update_from_parent(version);
+            m_updated = true;
+        }
+    }
+
+private:
+    mutable bool m_updated = false;
 };
 
 } // namespace _impl
diff --git a/Pods/Realm/include/core/realm/impl/transact_log.hpp b/Pods/Realm/include/core/realm/impl/transact_log.hpp
index ee3c710..edace6c 100644
--- a/Pods/Realm/include/core/realm/impl/transact_log.hpp
+++ b/Pods/Realm/include/core/realm/impl/transact_log.hpp
@@ -1725,7 +1725,7 @@ inline bool TransactLogParser::has_next() noexcept
 template <class InstructionHandler>
 void TransactLogParser::parse_one(InstructionHandler& handler)
 {
-    char instr_ch;
+    char instr_ch = 0;
     if (!read_char(instr_ch))
         parser_error(); // Throws
     //    std::cerr << "parsing " << util::promote(instr) << " @ " << std::hex << long(m_input_begin) << std::dec <<
diff --git a/Pods/Realm/include/core/realm/index_string.hpp b/Pods/Realm/include/core/realm/index_string.hpp
index b357c19..1c27039 100644
--- a/Pods/Realm/include/core/realm/index_string.hpp
+++ b/Pods/Realm/include/core/realm/index_string.hpp
@@ -226,7 +226,7 @@ class StringIndex {
     struct NodeChange {
         size_t ref1;
         size_t ref2;
-        enum ChangeType { none, insert_before, insert_after, split } type;
+        enum ChangeType { change_None, change_InsertBefore, change_InsertAfter, change_Split } type;
         NodeChange(ChangeType t, size_t r1 = 0, size_t r2 = 0)
             : ref1(r1)
             , ref2(r2)
@@ -236,7 +236,7 @@ class StringIndex {
         NodeChange()
             : ref1(0)
             , ref2(0)
-            , type(none)
+            , type(change_None)
         {
         }
     };
diff --git a/Pods/Realm/include/core/realm/metrics/metric_timer.hpp b/Pods/Realm/include/core/realm/metrics/metric_timer.hpp
index 505a23c..27ff716 100644
--- a/Pods/Realm/include/core/realm/metrics/metric_timer.hpp
+++ b/Pods/Realm/include/core/realm/metrics/metric_timer.hpp
@@ -25,21 +25,20 @@
 #include <memory>
 #include <ostream>
 
-#if REALM_METRICS
-
 namespace realm {
 namespace metrics {
 
+using nanosecond_storage_t = int64_t;
 
 class MetricTimerResult
 {
 public:
     MetricTimerResult();
     ~MetricTimerResult();
-    double get_elapsed_seconds() const;
-    void report_seconds(double time);
+    nanosecond_storage_t get_elapsed_nanoseconds() const;
+    void report_nanoseconds(nanosecond_storage_t time);
 protected:
-    double m_elapsed_seconds;
+    nanosecond_storage_t m_elapsed_nanoseconds;
 };
 
 
@@ -50,16 +49,16 @@ class MetricTimer {
 
     void reset();
 
-    /// Returns elapsed time in seconds since last call to reset().
-    double get_elapsed_time() const;
+    /// Returns elapsed time in nanoseconds since last call to reset().
+    nanosecond_storage_t get_elapsed_nanoseconds() const;
     /// Same as get_elapsed_time().
-    operator double() const;
+    operator nanosecond_storage_t() const;
 
     /// Format the elapsed time on the form 0h00m, 00m00s, 00.00s, or
     /// 000.0ms depending on magnitude.
-    static void format(double seconds, std::ostream&);
+    static void format(nanosecond_storage_t nanoseconds, std::ostream&);
 
-    static std::string format(double seconds);
+    static std::string format(nanosecond_storage_t nanoseconds);
 
 private:
     using clock_type = std::chrono::high_resolution_clock;
@@ -69,7 +68,7 @@ class MetricTimer {
     std::shared_ptr<MetricTimerResult> m_dest;
 
     time_point get_timer_ticks() const;
-    double calc_elapsed_seconds(time_point begin, time_point end) const;
+    nanosecond_storage_t calc_elapsed_nanoseconds(time_point begin, time_point end) const;
 };
 
 
@@ -78,14 +77,14 @@ inline void MetricTimer::reset()
     m_start = get_timer_ticks();
 }
 
-inline double MetricTimer::get_elapsed_time() const
+inline nanosecond_storage_t MetricTimer::get_elapsed_nanoseconds() const
 {
-    return calc_elapsed_seconds(m_start, get_timer_ticks());
+    return calc_elapsed_nanoseconds(m_start, get_timer_ticks());
 }
 
-inline MetricTimer::operator double() const
+inline MetricTimer::operator nanosecond_storage_t() const
 {
-    return get_elapsed_time();
+    return get_elapsed_nanoseconds();
 }
 
 inline std::ostream& operator<<(std::ostream& out, const MetricTimer& timer)
@@ -98,6 +97,4 @@ inline std::ostream& operator<<(std::ostream& out, const MetricTimer& timer)
 } // namespace metrics
 } // namespace realm
 
-#endif // REALM_METRICS
-
 #endif // REALM_METRIC_TIMER_HPP
diff --git a/Pods/Realm/include/core/realm/metrics/metrics.hpp b/Pods/Realm/include/core/realm/metrics/metrics.hpp
index 73e8d59..27a526d 100644
--- a/Pods/Realm/include/core/realm/metrics/metrics.hpp
+++ b/Pods/Realm/include/core/realm/metrics/metrics.hpp
@@ -20,11 +20,11 @@
 #define REALM_METRICS_HPP
 
 #include <memory>
-#include <vector>
 
 #include <realm/metrics/query_info.hpp>
 #include <realm/metrics/transaction_info.hpp>
 #include <realm/util/features.h>
+#include "realm/util/fixed_size_buffer.hpp"
 
 namespace realm {
 
@@ -32,11 +32,9 @@ class Group;
 
 namespace metrics {
 
-#if REALM_METRICS
-
 class Metrics {
 public:
-    Metrics();
+    Metrics(size_t max_history_size);
     ~Metrics() noexcept;
     size_t num_query_metrics() const;
     size_t num_transaction_metrics() const;
@@ -46,13 +44,15 @@ class Metrics {
 
     void start_read_transaction();
     void start_write_transaction();
-    void end_read_transaction(size_t total_size, size_t free_space, size_t num_objects, size_t num_versions);
-    void end_write_transaction(size_t total_size, size_t free_space, size_t num_objects, size_t num_versions);
+    void end_read_transaction(size_t total_size, size_t free_space, size_t num_objects, size_t num_versions,
+                              size_t num_decrypted_pages);
+    void end_write_transaction(size_t total_size, size_t free_space, size_t num_objects, size_t num_versions,
+                               size_t num_decrypted_pages);
     static std::unique_ptr<MetricTimer> report_fsync_time(const Group& g);
     static std::unique_ptr<MetricTimer> report_write_time(const Group& g);
 
-    using QueryInfoList = std::vector<QueryInfo>;
-    using TransactionInfoList = std::vector<TransactionInfo>;
+    using QueryInfoList = util::FixedSizeBuffer<QueryInfo>;
+    using TransactionInfoList = util::FixedSizeBuffer<TransactionInfo>;
 
     // Get the list of metric objects tracked since the last take
     std::unique_ptr<QueryInfoList> take_queries();
@@ -63,17 +63,11 @@ class Metrics {
 
     std::unique_ptr<TransactionInfo> m_pending_read;
     std::unique_ptr<TransactionInfo> m_pending_write;
-};
-
 
-#else
-
-class Metrics
-{
+    size_t m_max_num_queries;
+    size_t m_max_num_transactions;
 };
 
-#endif // REALM_METRICS
-
 } // namespace metrics
 } // namespace realm
 
diff --git a/Pods/Realm/include/core/realm/metrics/query_info.hpp b/Pods/Realm/include/core/realm/metrics/query_info.hpp
index 020eaa5..54b78d8 100644
--- a/Pods/Realm/include/core/realm/metrics/query_info.hpp
+++ b/Pods/Realm/include/core/realm/metrics/query_info.hpp
@@ -27,8 +27,6 @@
 #include <realm/util/features.h>
 #include <realm/metrics/metric_timer.hpp>
 
-#if REALM_METRICS
-
 namespace realm {
 
 class Query; // forward declare in namespace realm
@@ -53,14 +51,16 @@ class QueryInfo {
     ~QueryInfo() noexcept;
 
     std::string get_description() const;
+    std::string get_table_name() const;
     QueryType get_type() const;
-    double get_query_time() const;
+    nanosecond_storage_t get_query_time_nanoseconds() const;
 
     static std::unique_ptr<MetricTimer> track(const Query* query, QueryType type);
     static QueryType type_from_action(Action action);
 
 private:
     std::string m_description;
+    std::string m_table_name;
     QueryType m_type;
     std::shared_ptr<MetricTimerResult> m_query_time;
 };
@@ -68,5 +68,4 @@ class QueryInfo {
 } // namespace metrics
 } // namespace realm
 
-#endif // REALM_METRICS
 #endif // REALM_QUERY_INFO_HPP
diff --git a/Pods/Realm/include/core/realm/metrics/transaction_info.hpp b/Pods/Realm/include/core/realm/metrics/transaction_info.hpp
index c647e34..efcc2a6 100644
--- a/Pods/Realm/include/core/realm/metrics/transaction_info.hpp
+++ b/Pods/Realm/include/core/realm/metrics/transaction_info.hpp
@@ -25,8 +25,6 @@
 #include <realm/metrics/metric_timer.hpp>
 #include <realm/util/features.h>
 
-#if REALM_METRICS
-
 namespace realm {
 namespace metrics {
 
@@ -44,13 +42,14 @@ class TransactionInfo {
 
     TransactionType get_transaction_type() const;
     // the transaction time is a total amount which includes fsync_time + write_time + user_time
-    double get_transaction_time() const;
-    double get_fsync_time() const;
-    double get_write_time() const;
+    nanosecond_storage_t get_transaction_time_nanoseconds() const;
+    nanosecond_storage_t get_fsync_time_nanoseconds() const;
+    nanosecond_storage_t get_write_time_nanoseconds() const;
     size_t get_disk_size() const;
     size_t get_free_space() const;
     size_t get_total_objects() const;
     size_t get_num_available_versions() const;
+    size_t get_num_decrypted_pages() const;
 
 private:
     MetricTimerResult m_transaction_time;
@@ -63,15 +62,15 @@ class TransactionInfo {
     size_t m_total_objects;
     TransactionType m_type;
     size_t m_num_versions;
+    size_t m_num_decrypted_pages;
 
     friend class Metrics;
-    void update_stats(size_t disk_size, size_t free_space, size_t total_objects, size_t available_versions);
+    void update_stats(size_t disk_size, size_t free_space, size_t total_objects, size_t available_versions,
+                      size_t num_decrypted_pages);
     void finish_timer();
 };
 
 } // namespace metrics
 } // namespace realm
 
-#endif // REALM_METRICS
-
 #endif // REALM_TRANSACTION_INFO_HPP
diff --git a/Pods/Realm/include/core/realm/mixed.hpp b/Pods/Realm/include/core/realm/mixed.hpp
index f50f4a0..243ed45 100644
--- a/Pods/Realm/include/core/realm/mixed.hpp
+++ b/Pods/Realm/include/core/realm/mixed.hpp
@@ -138,6 +138,9 @@ class Mixed {
         return m_type;
     }
 
+    template <class T>
+    T get() const noexcept;
+
     int64_t get_int() const noexcept;
     bool get_bool() const noexcept;
     float get_float() const noexcept;
@@ -349,6 +352,55 @@ inline Timestamp Mixed::get_timestamp() const noexcept
     return m_timestamp;
 }
 
+template <>
+inline int64_t Mixed::get<Int>() const noexcept
+{
+    return get_int();
+}
+
+template <>
+inline bool Mixed::get<bool>() const noexcept
+{
+    return get_bool();
+}
+
+template <>
+inline float Mixed::get<float>() const noexcept
+{
+    return get_float();
+}
+
+template <>
+inline double Mixed::get<double>() const noexcept
+{
+    return get_double();
+}
+
+template <>
+inline OldDateTime Mixed::get<OldDateTime>() const noexcept
+{
+    return get_olddatetime();
+}
+
+template <>
+inline StringData Mixed::get<StringData>() const noexcept
+{
+    return get_string();
+}
+
+template <>
+inline BinaryData Mixed::get<BinaryData>() const noexcept
+{
+    return get_binary();
+}
+
+template <>
+inline Timestamp Mixed::get<Timestamp>() const noexcept
+{
+    return get_timestamp();
+}
+
+
 inline void Mixed::set_int(int64_t v) noexcept
 {
     m_type = type_Int;
diff --git a/Pods/Realm/include/core/realm/parser/keypath_mapping.hpp b/Pods/Realm/include/core/realm/parser/keypath_mapping.hpp
index ef71d8d..01ea65f 100644
--- a/Pods/Realm/include/core/realm/parser/keypath_mapping.hpp
+++ b/Pods/Realm/include/core/realm/parser/keypath_mapping.hpp
@@ -61,6 +61,10 @@ class KeyPathMapping
     bool has_mapping(ConstTableRef table, std::string name);
     KeyPathElement process_next_path(ConstTableRef table, KeyPath& path, size_t& index);
     void set_allow_backlinks(bool allow);
+    bool backlinks_allowed() const
+    {
+        return m_allow_backlinks;
+    }
     void set_backlink_class_prefix(std::string prefix);
     static Table* table_getter(TableRef table, const std::vector<KeyPathElement>& links);
 protected:
diff --git a/Pods/Realm/include/core/realm/parser/parser.hpp b/Pods/Realm/include/core/realm/parser/parser.hpp
index 7ce72e4..f04edc2 100644
--- a/Pods/Realm/include/core/realm/parser/parser.hpp
+++ b/Pods/Realm/include/core/realm/parser/parser.hpp
@@ -22,6 +22,7 @@
 #include <memory>
 #include <string>
 #include <vector>
+#include <realm/string_data.hpp>
 
 namespace realm {
 
@@ -110,13 +111,14 @@ struct DescriptorOrderingState
     struct PropertyState
     {
         std::string key_path;
+        std::string table_name;
         bool ascending;
     };
     struct SingleOrderingState
     {
         std::vector<PropertyState> properties;
         size_t limit;
-        enum class DescriptorType { Sort, Distinct, Limit } type;
+        enum class DescriptorType { Sort, Distinct, Limit, Include } type;
     };
     std::vector<SingleOrderingState> orderings;
 };
@@ -130,7 +132,11 @@ struct ParserResult
     DescriptorOrderingState ordering;
 };
 
-ParserResult parse(const std::string &query);
+ParserResult parse(const char* query); // assumes c-style null termination
+ParserResult parse(const std::string& query);
+ParserResult parse(const realm::StringData& query);
+
+DescriptorOrderingState parse_include_path(const realm::StringData& path);
 
 // run the analysis tool to check for cycles in the grammar
 // returns the number of problems found and prints some info to std::cout
diff --git a/Pods/Realm/include/core/realm/parser/query_builder.hpp b/Pods/Realm/include/core/realm/parser/query_builder.hpp
index ef91bb1..34a72b6 100644
--- a/Pods/Realm/include/core/realm/parser/query_builder.hpp
+++ b/Pods/Realm/include/core/realm/parser/query_builder.hpp
@@ -47,10 +47,13 @@ namespace parser {
 namespace query_builder {
 class Arguments;
 
-void apply_predicate(Query& query, const parser::Predicate& predicate, Arguments& arguments, parser::KeyPathMapping = parser::KeyPathMapping());
+void apply_predicate(Query& query, const parser::Predicate& predicate, Arguments& arguments,
+                     parser::KeyPathMapping mapping = parser::KeyPathMapping());
 
-void apply_ordering(DescriptorOrdering& ordering, ConstTableRef target, const parser::DescriptorOrderingState& state, Arguments& arguments);
-void apply_ordering(DescriptorOrdering& ordering, ConstTableRef target, const parser::DescriptorOrderingState& state);
+void apply_ordering(DescriptorOrdering& ordering, ConstTableRef target, const parser::DescriptorOrderingState& state,
+                    Arguments& arguments, parser::KeyPathMapping mapping = parser::KeyPathMapping());
+void apply_ordering(DescriptorOrdering& ordering, ConstTableRef target, const parser::DescriptorOrderingState& state,
+                    parser::KeyPathMapping mapping = parser::KeyPathMapping());
 
 
 struct AnyContext
diff --git a/Pods/Realm/include/core/realm/query.hpp b/Pods/Realm/include/core/realm/query.hpp
index 59a764f..6d9e5a3 100644
--- a/Pods/Realm/include/core/realm/query.hpp
+++ b/Pods/Realm/include/core/realm/query.hpp
@@ -103,6 +103,8 @@ class Query final {
 
     // Find links that point to a specific target row
     Query& links_to(size_t column_ndx, const ConstRow& target_row);
+    // Find links that point to specific target rows
+    Query& links_to(size_t column_ndx, const std::vector<ConstRow>& target_row);
 
     // Conditions: null
     Query& equal(size_t column_ndx, null);
diff --git a/Pods/Realm/include/core/realm/query_conditions.hpp b/Pods/Realm/include/core/realm/query_conditions.hpp
index f9d66fb..bc13bbe 100644
--- a/Pods/Realm/include/core/realm/query_conditions.hpp
+++ b/Pods/Realm/include/core/realm/query_conditions.hpp
@@ -282,11 +282,7 @@ struct NotEqual {
     }
 
     template <class A, class B, class C, class D>
-    bool operator()(A, B, C, D) const
-    {
-        REALM_ASSERT(false);
-        return false;
-    }
+    bool operator()(A, B, C, D) const = delete;
 
     static std::string description()
     {
diff --git a/Pods/Realm/include/core/realm/query_engine.hpp b/Pods/Realm/include/core/realm/query_engine.hpp
index 3bf2949..806bc2a 100644
--- a/Pods/Realm/include/core/realm/query_engine.hpp
+++ b/Pods/Realm/include/core/realm/query_engine.hpp
@@ -113,9 +113,11 @@ AggregateState      State of the aggregate - contains a state variable that stor
 #include <realm/util/miscellaneous.hpp>
 #include <realm/util/serializer.hpp>
 #include <realm/util/shared_ptr.hpp>
+#include <realm/util/string_buffer.hpp>
 #include <realm/utilities.hpp>
 
 #include <map>
+#include <unordered_set>
 
 #if REALM_X86_OR_X64_TRUE && defined(_MSC_FULL_VER) && _MSC_FULL_VER >= 160040219
 #include <immintrin.h>
@@ -725,7 +727,6 @@ class IntegerNodeBase : public ColumnNodeBase {
 };
 
 
-// FIXME: Add specialization that uses index for TConditionFunction = Equal
 template <class ColType, class TConditionFunction>
 class IntegerNode : public IntegerNodeBase<ColType> {
     using BaseType = IntegerNodeBase<ColType>;
@@ -744,11 +745,11 @@ class IntegerNode : public IntegerNodeBase<ColType> {
     {
     }
 
-    void aggregate_local_prepare(Action action, DataType col_id, bool nullable) override
+    void aggregate_local_prepare(Action action, DataType col_id, bool is_nullable) override
     {
         this->m_fastmode_disabled = (col_id == type_Float || col_id == type_Double);
         this->m_action = action;
-        this->m_find_callback_specialized = get_specialized_callback(action, col_id, nullable);
+        this->m_find_callback_specialized = get_specialized_callback(action, col_id, is_nullable);
     }
 
     size_t aggregate_local(QueryStateBase* st, size_t start, size_t end, size_t local_limit,
@@ -794,13 +795,13 @@ class IntegerNode : public IntegerNodeBase<ColType> {
         return not_found;
     }
 
-    virtual std::string describe(util::serializer::SerialisationState& state) const override
+    std::string describe(util::serializer::SerialisationState& state) const override
     {
         return state.describe_column(ParentNode::m_table, IntegerNodeBase<ColType>::m_condition_column->get_column_index())
             + " " + describe_condition() + " " + util::serializer::print_value(IntegerNodeBase<ColType>::m_value);
     }
 
-    virtual std::string describe_condition() const override
+    std::string describe_condition() const override
     {
         return TConditionFunction::description();
     }
@@ -813,21 +814,21 @@ class IntegerNode : public IntegerNodeBase<ColType> {
 protected:
     using TFind_callback_specialized = typename BaseType::TFind_callback_specialized;
 
-    static TFind_callback_specialized get_specialized_callback(Action action, DataType col_id, bool nullable)
+    static TFind_callback_specialized get_specialized_callback(Action action, DataType col_id, bool is_nullable)
     {
         switch (action) {
             case act_Count:
-                return get_specialized_callback_2_int<act_Count>(col_id, nullable);
+                return get_specialized_callback_2_int<act_Count>(col_id, is_nullable);
             case act_Sum:
-                return get_specialized_callback_2<act_Sum>(col_id, nullable);
+                return get_specialized_callback_2<act_Sum>(col_id, is_nullable);
             case act_Max:
-                return get_specialized_callback_2<act_Max>(col_id, nullable);
+                return get_specialized_callback_2<act_Max>(col_id, is_nullable);
             case act_Min:
-                return get_specialized_callback_2<act_Min>(col_id, nullable);
+                return get_specialized_callback_2<act_Min>(col_id, is_nullable);
             case act_FindAll:
-                return get_specialized_callback_2_int<act_FindAll>(col_id, nullable);
+                return get_specialized_callback_2_int<act_FindAll>(col_id, is_nullable);
             case act_CallbackIdx:
-                return get_specialized_callback_2_int<act_CallbackIdx>(col_id, nullable);
+                return get_specialized_callback_2_int<act_CallbackIdx>(col_id, is_nullable);
             default:
                 break;
         }
@@ -836,15 +837,15 @@ class IntegerNode : public IntegerNodeBase<ColType> {
     }
 
     template <Action TAction>
-    static TFind_callback_specialized get_specialized_callback_2(DataType col_id, bool nullable)
+    static TFind_callback_specialized get_specialized_callback_2(DataType col_id, bool is_nullable)
     {
         switch (col_id) {
             case type_Int:
-                return get_specialized_callback_3<TAction, type_Int>(nullable);
+                return get_specialized_callback_3<TAction, type_Int>(is_nullable);
             case type_Float:
-                return get_specialized_callback_3<TAction, type_Float>(nullable);
+                return get_specialized_callback_3<TAction, type_Float>(is_nullable);
             case type_Double:
-                return get_specialized_callback_3<TAction, type_Double>(nullable);
+                return get_specialized_callback_3<TAction, type_Double>(is_nullable);
             default:
                 break;
         }
@@ -853,19 +854,19 @@ class IntegerNode : public IntegerNodeBase<ColType> {
     }
 
     template <Action TAction>
-    static TFind_callback_specialized get_specialized_callback_2_int(DataType col_id, bool nullable)
+    static TFind_callback_specialized get_specialized_callback_2_int(DataType col_id, bool is_nullable)
     {
         if (col_id == type_Int) {
-            return get_specialized_callback_3<TAction, type_Int>(nullable);
+            return get_specialized_callback_3<TAction, type_Int>(is_nullable);
         }
         REALM_ASSERT(false); // Invalid aggregate source column
         return nullptr;
     }
 
     template <Action TAction, DataType TDataType>
-    static TFind_callback_specialized get_specialized_callback_3(bool nullable)
+    static TFind_callback_specialized get_specialized_callback_3(bool is_nullable)
     {
-        if (nullable) {
+        if (is_nullable) {
             return &BaseType::template find_callback_specialization<TConditionFunction, TAction, TDataType, true>;
         }
         else {
@@ -874,6 +875,193 @@ class IntegerNode : public IntegerNodeBase<ColType> {
     }
 };
 
+template <class ColType>
+class IntegerNode<ColType, Equal> : public IntegerNodeBase<ColType> {
+public:
+    using BaseType = IntegerNodeBase<ColType>;
+    using TConditionValue = typename BaseType::TConditionValue;
+
+    IntegerNode(TConditionValue value, size_t column_ndx)
+        : BaseType(value, column_ndx)
+    {
+    }
+    ~IntegerNode()
+    {
+        if (m_result) {
+            m_result->destroy();
+        }
+    }
+
+    void init() override
+    {
+        BaseType::init();
+        m_nb_needles = m_needles.size();
+
+        if (has_search_index()) {
+            if (m_result) {
+                m_result->clear();
+            }
+            else {
+                ref_type ref = IntegerColumn::create(Allocator::get_default());
+                m_result = std::make_unique<IntegerColumn>();
+                m_result->init_from_ref(Allocator::get_default(), ref);
+            }
+
+            IntegerNodeBase<ColType>::m_condition_column->find_all(*m_result, this->m_value, 0, realm::npos);
+            m_index_get = 0;
+            m_index_end = m_result->size();
+            IntegerNodeBase<ColType>::m_dT = 0;
+        }
+    }
+
+    void consume_condition(IntegerNode<ColType, Equal>* other)
+    {
+        REALM_ASSERT(this->m_condition_column == other->m_condition_column);
+        REALM_ASSERT(other->m_needles.empty());
+        if (m_needles.empty()) {
+            m_needles.insert(this->m_value);
+        }
+        m_needles.insert(other->m_value);
+    }
+
+    bool has_search_index() const
+    {
+        return IntegerNodeBase<ColType>::m_condition_column->has_search_index();
+    }
+
+    size_t find_first_local(size_t start, size_t end) override
+    {
+        REALM_ASSERT(this->m_table);
+
+        if (has_search_index()) {
+            if (m_index_end == 0)
+                return not_found;
+
+            if (start <= m_index_last_start)
+                m_index_get = 0;
+            else
+                m_index_last_start = start;
+
+            REALM_ASSERT(m_result);
+            while (m_index_get < m_index_end) {
+                // m_results are stored in sorted ascending order, guaranteed by the string index
+                size_t ndx = size_t(m_result->get(m_index_get));
+                if (ndx >= end) {
+                    break;
+                }
+                m_index_get++;
+                if (ndx >= start) {
+                    return ndx;
+                }
+            }
+            return not_found;
+        }
+
+
+        while (start < end) {
+            // Cache internal leaves
+            this->cache_leaf(start);
+
+            size_t end2;
+            if (end > this->m_leaf_end)
+                end2 = this->m_leaf_end - this->m_leaf_start;
+            else
+                end2 = end - this->m_leaf_start;
+
+            auto start2 = start - this->m_leaf_start;
+            size_t s = realm::npos;
+            if (m_nb_needles) {
+                s = find_first_haystack(start2, end2);
+            }
+            else if (end2 - start2 == 1) {
+                if (this->m_leaf_ptr->get(start2) == this->m_value) {
+                    s = start2;
+                }
+            }
+            else {
+                s = this->m_leaf_ptr->template find_first<Equal>(this->m_value, start2, end2);
+            }
+
+            if (s == not_found) {
+                start = this->m_leaf_end;
+                continue;
+            }
+            else
+                return s + this->m_leaf_start;
+        }
+
+        return not_found;
+    }
+
+    std::string describe(util::serializer::SerialisationState& state) const override
+    {
+        REALM_ASSERT(this->m_condition_column != nullptr);
+        std::string col_descr = state.describe_column(this->m_table, this->m_condition_column->get_column_index());
+
+        if (m_needles.empty()) {
+            return col_descr + " " + Equal::description() + " " +
+                   util::serializer::print_value(IntegerNodeBase<ColType>::m_value);
+        }
+
+        // FIXME: once the parser supports it, print something like "column IN {n1, n2, n3}"
+        std::string desc = "(";
+        bool is_first = true;
+        for (auto it : m_needles) {
+            if (!is_first)
+                desc += " or ";
+            desc +=
+                col_descr + " " + Equal::description() + " " + util::serializer::print_value(it); // "it" may be null
+            is_first = false;
+        }
+        desc += ")";
+        return desc;
+    }
+    std::unique_ptr<ParentNode> clone(QueryNodeHandoverPatches* patches) const override
+    {
+        return std::unique_ptr<ParentNode>(new IntegerNode<ColType, Equal>(*this, patches));
+    }
+
+private:
+    std::unordered_set<TConditionValue> m_needles;
+    std::unique_ptr<IntegerColumn> m_result;
+    size_t m_nb_needles = 0;
+    size_t m_index_get = 0;
+    size_t m_index_last_start = 0;
+    size_t m_index_end = 0;
+
+    IntegerNode(const IntegerNode<ColType, Equal>& from, QueryNodeHandoverPatches* patches)
+        : BaseType(from, patches)
+        , m_needles(from.m_needles)
+    {
+    }
+    size_t find_first_haystack(size_t start, size_t end)
+    {
+        const auto not_in_set = m_needles.end();
+        // for a small number of conditions, it is faster to do a linear search than to compute the hash
+        // the decision threshold was determined experimentally to be 22 conditions
+        bool search = m_nb_needles < 22;
+        auto cmp_fn = [this, search, not_in_set](const auto& v) {
+            if (search) {
+                for (auto it = m_needles.begin(); it != not_in_set; ++it) {
+                    if (*it == v)
+                        return true;
+                }
+                return false;
+            }
+            else {
+                return (m_needles.find(v) != not_in_set);
+            }
+        };
+        for (size_t i = start; i < end; ++i) {
+            auto val = this->m_leaf_ptr->get(i);
+            if (cmp_fn(val)) {
+                return i;
+            }
+        }
+        return realm::npos;
+    }
+};
+
 
 // This node is currently used for floats and doubles only
 template <class ColType, class TConditionFunction>
@@ -933,13 +1121,13 @@ class FloatDoubleNode : public ParentNode {
             return find(false);
     }
 
-    virtual std::string describe(util::serializer::SerialisationState& state) const override
+    std::string describe(util::serializer::SerialisationState& state) const override
     {
         REALM_ASSERT(m_condition_column.m_column != nullptr);
         return state.describe_column(ParentNode::m_table, m_condition_column.m_column->get_column_index())
             + " " + describe_condition() + " " + util::serializer::print_value(FloatDoubleNode::m_value);
     }
-    virtual std::string describe_condition() const override
+    std::string describe_condition() const override
     {
         return TConditionFunction::description();
     }
@@ -1096,20 +1284,25 @@ class BinaryNode : public ParentNode {
 };
 
 
-template <class TConditionFunction>
-class TimestampNode : public ParentNode {
+class TimestampNodeBase : public ParentNode {
 public:
     using TConditionValue = Timestamp;
     static const bool special_null_node = false;
+    using LeafTypeSeconds = typename IntNullColumn::LeafType;
+    using LeafInfoSeconds = typename IntNullColumn::LeafInfo;
+    using LeafTypeNanos = typename IntegerColumn::LeafType;
+    using LeafInfoNanos = typename IntegerColumn::LeafInfo;
+
 
-    TimestampNode(Timestamp v, size_t column)
+    TimestampNodeBase(Timestamp v, size_t column)
         : m_value(v)
+        , m_needle_seconds(m_value.is_null() ? util::none : util::make_optional(m_value.get_seconds()))
     {
         m_condition_column_idx = column;
     }
 
-    TimestampNode(null, size_t column)
-        : TimestampNode(Timestamp{}, column)
+    TimestampNodeBase(null, size_t column)
+        : TimestampNodeBase(Timestamp{}, column)
     {
     }
 
@@ -1128,40 +1321,158 @@ class TimestampNode : public ParentNode {
         ParentNode::init();
 
         m_dD = 100.0;
+
+        // Clear leaf cache
+        m_leaf_end_seconds = 0;
+        m_array_ptr_seconds.reset(); // Explicitly destroy the old one first, because we're reusing the memory.
+        m_array_ptr_seconds.reset(new (&m_leaf_cache_storage_seconds) LeafTypeSeconds(m_table->get_alloc()));
+        m_leaf_end_nanos = 0;
+        m_array_ptr_nanos.reset(); // Explicitly destroy the old one first, because we're reusing the memory.
+        m_array_ptr_nanos.reset(new (&m_leaf_cache_storage_nanos) LeafTypeNanos(m_table->get_alloc()));
+        m_condition_column_is_nullable = m_condition_column->is_nullable();
     }
 
-    size_t find_first_local(size_t start, size_t end) override
+protected:
+    void get_leaf_seconds(const TimestampColumn& col, size_t ndx)
     {
-        size_t ret = m_condition_column->find<TConditionFunction>(m_value, start, end);
-        return ret;
+        size_t ndx_in_leaf;
+        LeafInfoSeconds leaf_info_seconds{&m_leaf_ptr_seconds, m_array_ptr_seconds.get()};
+        col.get_seconds_leaf(ndx, ndx_in_leaf, leaf_info_seconds);
+        m_leaf_start_seconds = ndx - ndx_in_leaf;
+        m_leaf_end_seconds = m_leaf_start_seconds + m_leaf_ptr_seconds->size();
     }
 
-    virtual std::string describe(util::serializer::SerialisationState& state) const override
+    void get_leaf_nanos(const TimestampColumn& col, size_t ndx)
     {
-        REALM_ASSERT(m_condition_column != nullptr);
-        return state.describe_column(ParentNode::m_table, m_condition_column->get_column_index())
-            + " " + TConditionFunction::description() + " " + util::serializer::print_value(TimestampNode::m_value);
+        size_t ndx_in_leaf;
+        LeafInfoNanos leaf_info_nanos{&m_leaf_ptr_nanos, m_array_ptr_nanos.get()};
+        col.get_nanoseconds_leaf(ndx, ndx_in_leaf, leaf_info_nanos);
+        m_leaf_start_nanos = ndx - ndx_in_leaf;
+        m_leaf_end_nanos = m_leaf_start_nanos + m_leaf_ptr_nanos->size();
     }
 
-    std::unique_ptr<ParentNode> clone(QueryNodeHandoverPatches* patches) const override
+    util::Optional<int64_t> get_seconds_and_cache(size_t ndx)
     {
-        return std::unique_ptr<ParentNode>(new TimestampNode(*this, patches));
+        // Cache internal leaves
+        if (ndx >= this->m_leaf_end_seconds || ndx < this->m_leaf_start_seconds) {
+            this->get_leaf_seconds(*this->m_condition_column, ndx);
+        }
+        const size_t ndx_in_leaf = ndx - m_leaf_start_seconds;
+        return this->m_leaf_ptr_seconds->get(ndx_in_leaf);
     }
 
-    TimestampNode(const TimestampNode& from, QueryNodeHandoverPatches* patches)
+    int32_t get_nanoseconds_and_cache(size_t ndx)
+    {
+        // Cache internal leaves
+        if (ndx >= this->m_leaf_end_nanos || ndx < this->m_leaf_start_nanos) {
+            this->get_leaf_nanos(*this->m_condition_column, ndx);
+        }
+        return int32_t(this->m_leaf_ptr_nanos->get(ndx - this->m_leaf_start_nanos));
+    }
+
+    TimestampNodeBase(const TimestampNodeBase& from, QueryNodeHandoverPatches* patches)
         : ParentNode(from, patches)
         , m_value(from.m_value)
+        , m_needle_seconds(from.m_needle_seconds)
         , m_condition_column(from.m_condition_column)
+        , m_condition_column_is_nullable(from.m_condition_column_is_nullable)
     {
         if (m_condition_column && patches)
             m_condition_column_idx = m_condition_column->get_column_index();
     }
 
-private:
     Timestamp m_value;
+    util::Optional<int64_t> m_needle_seconds;
     const TimestampColumn* m_condition_column;
+    bool m_condition_column_is_nullable = false;
+
+    // Leaf cache seconds
+    using LeafCacheStorageSeconds =
+        typename std::aligned_storage<sizeof(LeafTypeSeconds), alignof(LeafTypeSeconds)>::type;
+    LeafCacheStorageSeconds m_leaf_cache_storage_seconds;
+    std::unique_ptr<LeafTypeSeconds, PlacementDelete> m_array_ptr_seconds;
+    const LeafTypeSeconds* m_leaf_ptr_seconds = nullptr;
+    size_t m_leaf_start_seconds = npos;
+    size_t m_leaf_end_seconds = 0;
+
+    // Leaf cache nanoseconds
+    using LeafCacheStorageNanos = typename std::aligned_storage<sizeof(LeafTypeNanos), alignof(LeafTypeNanos)>::type;
+    LeafCacheStorageNanos m_leaf_cache_storage_nanos;
+    std::unique_ptr<LeafTypeNanos, PlacementDelete> m_array_ptr_nanos;
+    const LeafTypeNanos* m_leaf_ptr_nanos = nullptr;
+    size_t m_leaf_start_nanos = npos;
+    size_t m_leaf_end_nanos = 0;
+};
+
+template <class TConditionFunction>
+class TimestampNode : public TimestampNodeBase {
+public:
+    using TimestampNodeBase::TimestampNodeBase;
+
+    template <class Condition>
+    size_t find_first_local_seconds(size_t start, size_t end)
+    {
+        while (start < end) {
+            // Cache internal leaves
+            if (start >= this->m_leaf_end_seconds || start < this->m_leaf_start_seconds) {
+                this->get_leaf_seconds(*this->m_condition_column, start);
+            }
+
+            size_t end2;
+            if (end > this->m_leaf_end_seconds)
+                end2 = this->m_leaf_end_seconds - this->m_leaf_start_seconds;
+            else
+                end2 = end - this->m_leaf_start_seconds;
+
+            size_t s = this->m_leaf_ptr_seconds->template find_first<Condition>(
+                m_needle_seconds, start - this->m_leaf_start_seconds, end2);
+
+            if (s == not_found) {
+                start = this->m_leaf_end_seconds;
+                continue;
+            }
+            return s + this->m_leaf_start_seconds;
+        }
+        return not_found;
+    }
+
+    // see query_engine.cpp for operator specialisations
+    size_t find_first_local(size_t start, size_t end) override
+    {
+        REALM_ASSERT(this->m_table);
+
+        size_t ret = m_condition_column->find<TConditionFunction>(m_value, start, end);
+        return ret;
+    }
+
+    virtual std::string describe(util::serializer::SerialisationState& state) const override
+    {
+        REALM_ASSERT(m_condition_column != nullptr);
+        return state.describe_column(ParentNode::m_table, m_condition_column->get_column_index()) + " " +
+               TConditionFunction::description() + " " + util::serializer::print_value(TimestampNode::m_value);
+    }
+
+    std::unique_ptr<ParentNode> clone(QueryNodeHandoverPatches* patches) const override
+    {
+        return std::unique_ptr<ParentNode>(new TimestampNode(*this, patches));
+    }
 };
 
+template <>
+size_t TimestampNode<Greater>::find_first_local(size_t start, size_t end);
+template <>
+size_t TimestampNode<Less>::find_first_local(size_t start, size_t end);
+template <>
+size_t TimestampNode<GreaterEqual>::find_first_local(size_t start, size_t end);
+template <>
+size_t TimestampNode<LessEqual>::find_first_local(size_t start, size_t end);
+template <>
+size_t TimestampNode<Equal>::find_first_local(size_t start, size_t end);
+template <>
+size_t TimestampNode<NotEqual>::find_first_local(size_t start, size_t end);
+template <>
+size_t TimestampNode<NotNull>::find_first_local(size_t start, size_t end);
+
 class StringNodeBase : public ParentNode {
 public:
     using TConditionValue = StringData;
@@ -1184,6 +1495,11 @@ class StringNodeBase : public ParentNode {
         do_verify_column(m_condition_column);
     }
 
+    bool has_search_index() const
+    {
+        return m_condition_column->has_search_index();
+    }
+
     void init() override
     {
         ParentNode::init();
@@ -1301,7 +1617,6 @@ class StringNode : public StringNodeBase {
         StringNodeBase::init();
     }
 
-
     size_t find_first_local(size_t start, size_t end) override
     {
         TConditionFunction cond;
@@ -1309,7 +1624,7 @@ class StringNode : public StringNodeBase {
         for (size_t s = start; s < end; ++s) {
             StringData t = get_string(s);
             
-            if (cond(StringData(m_value), m_ucase.data(), m_lcase.data(), t))
+            if (cond(StringData(m_value), m_ucase.c_str(), m_lcase.c_str(), t))
                 return s;
         }
         return not_found;
@@ -1459,7 +1774,7 @@ class StringNode<ContainsIns> : public StringNodeBase {
             if (!bool(m_value)) {
                 return s;
             }
-            if (cond(StringData(m_value), m_ucase.data(), m_lcase.data(), m_charmap, t))
+            if (cond(StringData(m_value), m_ucase.c_str(), m_lcase.c_str(), m_charmap, t))
                 return s;
         }
         return not_found;
@@ -1537,9 +1852,9 @@ class StringNodeEqualBase : public StringNodeBase {
     size_t m_last_start;
 };
 
-
 // Specialization for Equal condition on Strings - we specialize because we can utilize indexes (if they exist) for
-// Equal.
+// Equal. This specialisation also supports combining other StringNode<Equal> conditions into itself in order to
+// optimise the non-indexed linear search that can be happen when many conditions are OR'd together in an "IN" query.
 // Future optimization: make specialization for greater, notequal, etc
 template <>
 class StringNode<Equal> : public StringNodeEqualBase {
@@ -1548,13 +1863,37 @@ class StringNode<Equal> : public StringNodeEqualBase {
 
     void _search_index_init() override;
 
+    void consume_condition(StringNode<Equal>* other);
+
     std::unique_ptr<ParentNode> clone(QueryNodeHandoverPatches* patches) const override
     {
         return std::unique_ptr<ParentNode>(new StringNode<Equal>(*this, patches));
     }
 
+    std::string describe(util::serializer::SerialisationState& state) const override;
+
+    StringNode<Equal>(const StringNode& from, QueryNodeHandoverPatches* patches)
+    : StringNodeEqualBase(from, patches)
+    {
+        for (auto it = from.m_needles.begin(); it != from.m_needles.end(); ++it) {
+            if (it->data() == nullptr && it->size() == 0) {
+                m_needles.insert(StringData()); // nulls
+            }
+            else {
+                m_needle_storage.emplace_back(StringBuffer());
+                m_needle_storage.back().append(it->data(), it->size());
+                m_needles.insert(StringData(m_needle_storage.back().data(), m_needle_storage.back().size()));
+            }
+        }
+    }
+
 private:
+    template <class ArrayType>
+    size_t find_first_in(ArrayType& array, size_t begin, size_t end);
+
     size_t _find_first_local(size_t start, size_t end) override;
+    std::unordered_set<StringData> m_needles;
+    std::vector<StringBuffer> m_needle_storage;
 };
 
 
@@ -1603,7 +1942,6 @@ class StringNode<EqualIns> : public StringNodeEqualBase {
     size_t _find_first_local(size_t start, size_t end) override;
 };
 
-
 // OR node contains at least two node pointers: Two or more conditions to OR
 // together in m_conditions, and the next AND condition (if any) in m_child.
 //
@@ -1641,11 +1979,9 @@ class OrNode : public ParentNode {
             condition->verify_column();
         }
     }
+
     std::string describe(util::serializer::SerialisationState& state) const override
     {
-        if (m_conditions.size() >= 2) {
-
-        }
         std::string s;
         for (size_t i = 0; i < m_conditions.size(); ++i) {
             if (m_conditions[i]) {
@@ -1661,13 +1997,19 @@ class OrNode : public ParentNode {
         return s;
     }
 
-
     void init() override
     {
         ParentNode::init();
 
         m_dD = 10.0;
 
+        std::sort(m_conditions.begin(), m_conditions.end(),
+                  [](auto& a, auto& b) { return a->m_condition_column_idx < b->m_condition_column_idx; });
+
+        combine_conditions<StringNode<Equal>>();
+        combine_conditions<IntegerNode<IntegerColumn, Equal>>();
+        combine_conditions<IntegerNode<IntNullColumn, Equal>>();
+
         m_start.clear();
         m_start.resize(m_conditions.size(), 0);
 
@@ -1757,6 +2099,36 @@ class OrNode : public ParentNode {
     std::vector<std::unique_ptr<ParentNode>> m_conditions;
 
 private:
+    template<class QueryNodeType>
+    void combine_conditions() {
+        QueryNodeType* first_match = nullptr;
+        QueryNodeType* advance = nullptr;
+        auto it = m_conditions.begin();
+        while (it != m_conditions.end()) {
+            // Only try to optimize on QueryNodeType conditions without search index
+            auto node = it->get();
+            if ((first_match = dynamic_cast<QueryNodeType*>(node)) && first_match->m_child == nullptr &&
+                !first_match->has_search_index()) {
+                auto col_ndx = first_match->m_condition_column_idx;
+                auto next = it + 1;
+                while (next != m_conditions.end() && (*next)->m_condition_column_idx == col_ndx) {
+                    auto next_node = next->get();
+                    if ((advance = dynamic_cast<QueryNodeType*>(next_node)) && next_node->m_child == nullptr) {
+                        first_match->consume_condition(advance);
+                        next = m_conditions.erase(next);
+                    }
+                    else {
+                        ++next;
+                    }
+                }
+                it = next;
+            }
+            else {
+                ++it;
+            }
+        }
+    }
+
     // start index of the last find for each cond
     std::vector<size_t> m_start;
     // last looked at index of the lasft find for each cond
@@ -2000,10 +2372,10 @@ class TwoColumnsNode : public ParentNode {
 
 // For Next-Generation expressions like col1 / col2 + 123 > col4 * 100.
 class ExpressionNode : public ParentNode {
-
 public:
     ExpressionNode(std::unique_ptr<Expression>);
 
+    void init() override;
     size_t find_first_local(size_t start, size_t end) override;
 
     void table_changed() override;
@@ -2022,7 +2394,7 @@ class ExpressionNode : public ParentNode {
 
 
 struct LinksToNodeHandoverPatch : public QueryNodeHandoverPatch {
-    std::unique_ptr<RowBaseHandoverPatch> m_target_row;
+    std::vector<std::unique_ptr<RowBaseHandoverPatch>> m_target_rows;
     size_t m_origin_column;
 };
 
@@ -2030,7 +2402,15 @@ class LinksToNode : public ParentNode {
 public:
     LinksToNode(size_t origin_column_index, const ConstRow& target_row)
         : m_origin_column(origin_column_index)
-        , m_target_row(target_row)
+        , m_target_rows(1, target_row)
+    {
+        m_dD = 10.0;
+        m_dT = 50.0;
+    }
+
+    LinksToNode(size_t origin_column_index, const std::vector<ConstRow>& target_rows)
+        : m_origin_column(origin_column_index)
+        , m_target_rows(target_rows)
     {
         m_dD = 10.0;
         m_dT = 50.0;
@@ -2063,21 +2443,29 @@ class LinksToNode : public ParentNode {
     size_t find_first_local(size_t start, size_t end) override
     {
         REALM_ASSERT(m_column);
-        if (!m_target_row.is_attached())
-            return not_found;
-
         if (m_column_type == type_Link) {
             LinkColumn& cl = static_cast<LinkColumn&>(*m_column);
-            return cl.find_first(m_target_row.get_index() + 1, start,
-                                 end); // LinkColumn stores link to row N as the integer N + 1
+            for (auto& row : m_target_rows) {
+                if (row.is_attached()) {
+                    // LinkColumn stores link to row N as the integer N + 1
+                    auto pos = cl.find_first(row.get_index() + 1, start, end);
+                    if (pos != realm::npos) {
+                        return pos;
+                    }
+                }
+            }
         }
         else if (m_column_type == type_LinkList) {
             LinkListColumn& cll = static_cast<LinkListColumn&>(*m_column);
 
             for (size_t i = start; i < end; i++) {
                 LinkViewRef lv = cll.get(i);
-                if (lv->find(m_target_row.get_index()) != not_found)
-                    return i;
+                for (auto& row : m_target_rows) {
+                    if (row.is_attached()) {
+                        if (lv->find(row.get_index()) != not_found)
+                            return i;
+                    }
+                }
             }
         }
 
@@ -2099,14 +2487,18 @@ class LinksToNode : public ParentNode {
         REALM_ASSERT(patch);
 
         m_origin_column = patch->m_origin_column;
-        m_target_row.apply_and_consume_patch(patch->m_target_row, group);
+        auto sz = patch->m_target_rows.size();
+        m_target_rows.resize(sz);
+        for (size_t i = 0; i < sz; i++) {
+            m_target_rows[i].apply_and_consume_patch(patch->m_target_rows[i], group);
+        }
 
         ParentNode::apply_handover_patch(patches, group);
     }
 
 private:
     size_t m_origin_column = npos;
-    ConstRow m_target_row;
+    std::vector<ConstRow> m_target_rows;
     LinkColumnBase* m_column = nullptr;
     DataType m_column_type;
 
@@ -2115,7 +2507,11 @@ class LinksToNode : public ParentNode {
     {
         auto patch = std::make_unique<LinksToNodeHandoverPatch>();
         patch->m_origin_column = source.m_column->get_column_index();
-        ConstRow::generate_patch(source.m_target_row, patch->m_target_row);
+        auto sz = source.m_target_rows.size();
+        patch->m_target_rows.resize(sz);
+        for (size_t i = 0; i < sz; i++) {
+            ConstRow::generate_patch(source.m_target_rows[i], patch->m_target_rows[i]);
+        }
         patches->push_back(std::move(patch));
     }
 };
diff --git a/Pods/Realm/include/core/realm/query_expression.hpp b/Pods/Realm/include/core/realm/query_expression.hpp
index 330cc03..bd6e1a8 100644
--- a/Pods/Realm/include/core/realm/query_expression.hpp
+++ b/Pods/Realm/include/core/realm/query_expression.hpp
@@ -130,6 +130,8 @@ The Columns class encapsulates all this into a simple class that, for any type T
 #include <realm/column_link.hpp>
 #include <realm/column_linklist.hpp>
 #include <realm/column_table.hpp>
+#include <realm/column_string.hpp>
+#include <realm/column_timestamp.hpp>
 #include <realm/column_type_traits.hpp>
 #include <realm/impl/sequential_getter.hpp>
 #include <realm/link_view.hpp>
@@ -139,6 +141,7 @@ The Columns class encapsulates all this into a simple class that, for any type T
 #include <realm/util/serializer.hpp>
 
 #include <numeric>
+#include <algorithm>
 
 // Normally, if a next-generation-syntax condition is supported by the old query_engine.hpp, a query_engine node is
 // created because it's faster (by a factor of 5 - 10). Because many of our existing next-generation-syntax unit
@@ -348,7 +351,7 @@ struct RowIndex {
 };
 
 struct ValueBase {
-    static const size_t default_size = 8;
+    static const size_t chunk_size = 8;
     virtual void export_bool(ValueBase& destination) const = 0;
     virtual void export_Timestamp(ValueBase& destination) const = 0;
     virtual void export_int(ValueBase& destination) const = 0;
@@ -378,6 +381,11 @@ class Expression {
     {
     }
 
+    virtual double init()
+    {
+        return 50.0; // Default dT
+    }
+
     virtual size_t find_first(size_t start, size_t end) const = 0;
     virtual void set_base_table(const Table* table) = 0;
     virtual void verify_column() const = 0;
@@ -429,6 +437,21 @@ class Subexpr {
         return nullptr;
     }
 
+    virtual bool has_constant_evaluation() const
+    {
+        return false;
+    }
+
+    virtual bool has_search_index() const
+    {
+        return false;
+    }
+
+    virtual std::vector<size_t> find_all(util::Optional<Mixed>) const
+    {
+        return {};
+    }
+
     virtual void evaluate(size_t index, ValueBase& destination) = 0;
 };
 
@@ -1172,11 +1195,11 @@ class Value : public ValueBase, public Subexpr2<T> {
 public:
     Value()
     {
-        init(false, ValueBase::default_size, T());
+        init(false, 1, T());
     }
     Value(T v)
     {
-        init(false, ValueBase::default_size, v);
+        init(false, 1, v);
     }
 
     Value(bool from_link_list, size_t values)
@@ -1210,7 +1233,7 @@ class Value : public ValueBase, public Subexpr2<T> {
     {
     }
 
-    virtual std::string description(util::serializer::SerialisationState&) const override
+    std::string description(util::serializer::SerialisationState&) const override
     {
         if (ValueBase::m_from_link_list) {
             return util::serializer::print_value(util::to_string(ValueBase::m_values)
@@ -1222,6 +1245,11 @@ class Value : public ValueBase, public Subexpr2<T> {
         return "";
     }
 
+    bool has_constant_evaluation() const override
+    {
+        return true;
+    }
+
     void evaluate(size_t, ValueBase& destination) override
     {
         destination.import(*this);
@@ -1379,6 +1407,21 @@ class Value : public ValueBase, public Subexpr2<T> {
     }
 
     // Given a TCond (==, !=, >, <, >=, <=) and two Value<T>, return index of first match
+    template <class TCond>
+    REALM_FORCEINLINE static size_t compare_const(const Value<T>* left, Value<T>* right)
+    {
+        TCond c;
+
+        size_t sz = right->ValueBase::m_values;
+        bool left_is_null = left->m_storage.is_null(0);
+        for (size_t m = 0; m < sz; m++) {
+            if (c(left->m_storage[0], right->m_storage[m], left_is_null, right->m_storage.is_null(m)))
+                return right->m_from_link_list ? 0 : m;
+        }
+
+        return not_found; // no match
+    }
+
     template <class TCond>
     REALM_FORCEINLINE static size_t compare(Value<T>* left, Value<T>* right)
     {
@@ -1435,7 +1478,7 @@ class ConstantStringValue : public Value<StringData> {
         : Value()
         , m_string(string.is_null() ? util::none : util::make_optional(std::string(string)))
     {
-        init(false, ValueBase::default_size, m_string);
+        init(false, 1, m_string);
     }
 
     std::unique_ptr<Subexpr> clone(QueryNodeHandoverPatches*) const override
@@ -1736,6 +1779,19 @@ struct MakeLinkVector : public LinkMapFunction {
     std::vector<size_t>& m_links;
 };
 
+struct UnaryLinkResult : public LinkMapFunction {
+    UnaryLinkResult()
+        : m_result(realm::not_found)
+    {
+    }
+    bool consume(size_t row_index) override
+    {
+        m_result = row_index;
+        return false; // exit search, only one result ever expected
+    }
+    size_t m_result;
+};
+
 struct CountLinks : public LinkMapFunction {
     bool consume(size_t) override
     {
@@ -1874,13 +1930,23 @@ class LinkMap {
         return s;
     }
 
-    std::vector<size_t> get_links(size_t index)
+    size_t get_unary_link_or_not_found(size_t index) const
+    {
+        REALM_ASSERT(m_only_unary_links);
+        UnaryLinkResult res;
+        map_links(index, res);
+        return res.m_result;
+    }
+
+    std::vector<size_t> get_links(size_t index) const
     {
         std::vector<size_t> res;
         get_links(index, res);
         return res;
     }
 
+    std::vector<size_t> get_origin_ndxs(size_t index, size_t column = 0) const;
+
     size_t count_links(size_t row)
     {
         CountLinks counter;
@@ -1895,7 +1961,7 @@ class LinkMap {
         return counter.result();
     }
 
-    void map_links(size_t row, LinkMapFunction& lm)
+    void map_links(size_t row, LinkMapFunction& lm) const
     {
         map_links(0, row, lm);
     }
@@ -1924,7 +1990,7 @@ class LinkMap {
     std::vector<const ColumnBase*> m_link_columns;
 
 private:
-    void map_links(size_t column, size_t row, LinkMapFunction& lm)
+    void map_links(size_t column, size_t row, LinkMapFunction& lm) const
     {
         bool last = (column + 1 == m_link_columns.size());
         ColumnType type = m_link_types[column];
@@ -1972,8 +2038,7 @@ class LinkMap {
         }
     }
 
-
-    void get_links(size_t row, std::vector<size_t>& result)
+    void get_links(size_t row, std::vector<size_t>& result) const
     {
         MakeLinkVector mlv = MakeLinkVector(result);
         map_links(row, mlv);
@@ -2044,6 +2109,36 @@ class SimpleQuerySupport : public Subexpr2<T> {
         }
     }
 
+    bool has_search_index() const override
+    {
+        return m_link_map.target_table()->has_search_index(m_column_ndx);
+    }
+
+    std::vector<size_t> find_all(util::Optional<Mixed> value) const override
+    {
+        std::vector<size_t> ret;
+        ref_type ref = IntegerColumn::create(Allocator::get_default());
+        IntegerColumn result;
+        result.init_from_ref(Allocator::get_default(), ref);
+
+        T val{};
+        if (value) {
+            val = value->get<T>();
+        }
+
+        auto col = dynamic_cast<const typename ColumnTypeTraits<T>::column_type*>(m_column);
+        col->find_all(result, val, 0, realm::npos);
+
+        auto sz = result.size();
+        for (size_t i = 0; i < sz; i++) {
+            auto ndxs = m_link_map.get_origin_ndxs(size_t(result.get(i)));
+            ret.insert(ret.end(), ndxs.begin(), ndxs.end());
+        }
+        result.destroy();
+
+        return ret;
+    }
+
     void verify_column() const override
     {
         // verify links
@@ -2061,14 +2156,25 @@ class SimpleQuerySupport : public Subexpr2<T> {
         size_t col = column_ndx();
 
         if (links_exist()) {
-            std::vector<size_t> links = m_link_map.get_links(index);
-            Value<T> v = make_value_for_link<T>(m_link_map.only_unary_links(), links.size());
-
-            for (size_t t = 0; t < links.size(); t++) {
-                size_t link_to = links[t];
-                v.m_storage.set(t, m_link_map.target_table()->template get<T>(col, link_to));
+            if (m_link_map.only_unary_links()) {
+                const Table* target_table = m_link_map.target_table();
+                d.init(false, 1);
+                d.m_storage.set_null(0);
+                size_t link_translation_index = this->m_link_map.get_unary_link_or_not_found(index);
+                if (link_translation_index != realm::not_found) {
+                    d.m_storage.set(0, target_table->get<T>(col, link_translation_index));
+                }
+            }
+            else {
+                std::vector<size_t> links = m_link_map.get_links(index);
+                constexpr bool has_only_unary_links = false;
+                Value<T> v = make_value_for_link<T>(has_only_unary_links, links.size());
+                for (size_t t = 0; t < links.size(); t++) {
+                    size_t link_to = links[t];
+                    v.m_storage.set(t, m_link_map.target_table()->template get<T>(col, link_to));
+                }
+                destination.import(v);
             }
-            destination.import(v);
         }
         else {
             // Not a link column
@@ -2084,6 +2190,16 @@ class SimpleQuerySupport : public Subexpr2<T> {
         return m_link_map.m_link_columns.size() > 0;
     }
 
+    bool only_unary_links() const
+    {
+        return m_link_map.only_unary_links();
+    }
+
+    LinkMap get_link_map() const
+    {
+        return m_link_map;
+    }
+
     virtual std::string description(util::serializer::SerialisationState& state) const override
     {
         return state.describe_columns(m_link_map, m_column_ndx);
@@ -2721,7 +2837,7 @@ class Columns<SubTable> : public Subexpr2<SubTable> {
 
     void evaluate(size_t index, ValueBase& destination) override
     {
-        evaluate_internal(index, destination, ValueBase::default_size);
+        evaluate_internal(index, destination, ValueBase::chunk_size);
     }
 
     void evaluate_internal(size_t index, ValueBase& destination, size_t nb_elements);
@@ -3106,6 +3222,45 @@ class Columns : public Subexpr2<T> {
         }
     }
 
+    bool has_search_index() const override
+    {
+        return m_link_map.target_table()->has_search_index(m_column_ndx);
+    }
+
+    std::vector<size_t> find_all(util::Optional<Mixed> value) const override
+    {
+        std::vector<size_t> ret;
+        ref_type ref = IntegerColumn::create(Allocator::get_default());
+        IntegerColumn result;
+        result.init_from_ref(Allocator::get_default(), ref);
+        if (m_nullable && std::is_same<typename ColType::value_type, int64_t>::value) {
+            util::Optional<int64_t> val;
+            if (value) {
+                val = value->get_int();
+            }
+            auto sgc = static_cast<SequentialGetter<IntNullColumn>*>(m_sg.get());
+            sgc->m_column->find_all(result, val, 0, realm::npos);
+        }
+        else {
+            T val{};
+            if (value) {
+                val = value->get<T>();
+            }
+            auto sgc = static_cast<SequentialGetter<ColType>*>(m_sg.get());
+            sgc->m_column->find_all(result, val, 0, realm::npos);
+        }
+
+        auto sz = result.size();
+        for (size_t i = 0; i < sz; i++) {
+            auto ndxs = m_link_map.get_origin_ndxs(size_t(result.get(i)));
+            ret.insert(ret.end(), ndxs.begin(), ndxs.end());
+        }
+        result.destroy();
+
+        return ret;
+    }
+
+
     void verify_column() const override
     {
         // verify links
@@ -3168,14 +3323,14 @@ class Columns : public Subexpr2<T> {
             sgc->cache_next(index);
             size_t colsize = sgc->m_column->size();
 
-            // Now load `ValueBase::default_size` rows from from the leaf into m_storage. If it's an integer
+            // Now load `ValueBase::chunk_size` rows from from the leaf into m_storage. If it's an integer
             // leaf, then it contains the method get_chunk() which copies these values in a super fast way (first
             // case of the `if` below. Otherwise, copy the values one by one in a for-loop (the `else` case).
-            if (std::is_same<U, int64_t>::value && index + ValueBase::default_size <= sgc->m_leaf_end) {
-                Value<int64_t> v;
+            if (std::is_same<U, int64_t>::value && index + ValueBase::chunk_size <= sgc->m_leaf_end) {
+                Value<int64_t> v(false, ValueBase::chunk_size);
 
                 // If you want to modify 'default_size' then update Array::get_chunk()
-                REALM_ASSERT_3(ValueBase::default_size, ==, 8);
+                REALM_ASSERT_3(ValueBase::chunk_size, ==, 8);
 
                 auto sgc_2 = static_cast<SequentialGetter<ColType>*>(m_sg.get());
                 sgc_2->m_leaf_ptr->get_chunk(index - sgc->m_leaf_start, v.m_storage.m_first);
@@ -3184,8 +3339,8 @@ class Columns : public Subexpr2<T> {
             }
             else {
                 size_t rows = colsize - index;
-                if (rows > ValueBase::default_size)
-                    rows = ValueBase::default_size;
+                if (rows > ValueBase::chunk_size)
+                    rows = ValueBase::chunk_size;
                 Value<typename util::RemoveOptional<U>::type> v(false, rows);
 
                 for (size_t t = 0; t < rows; t++)
@@ -3217,11 +3372,21 @@ class Columns : public Subexpr2<T> {
         return m_link_map.m_link_columns.size() > 0;
     }
 
+    bool only_unary_links() const
+    {
+        return m_link_map.only_unary_links();
+    }
+
     bool is_nullable() const
     {
         return m_nullable;
     }
 
+    LinkMap get_link_map() const
+    {
+        return m_link_map;
+    }
+
     size_t column_ndx() const noexcept
     {
         return m_sg ? get_column_base().get_column_index() : m_column_ndx;
@@ -3788,6 +3953,26 @@ class Operator : public Subexpr2<typename oper::type> {
     std::unique_ptr<TRight> m_right;
 };
 
+namespace {
+template <class T>
+inline Mixed get_mixed(const Value<T>& val)
+{
+    return Mixed(val.m_storage[0]);
+}
+
+template <>
+inline Mixed get_mixed(const Value<RowIndex>&)
+{
+    REALM_ASSERT(false);
+    return Mixed();
+}
+
+template <>
+inline Mixed get_mixed(const Value<int>& val)
+{
+    return Mixed(int64_t(val.m_storage[0]));
+}
+} // namespace
 
 template <class TCond, class T, class TLeft, class TRight>
 class Compare : public Expression {
@@ -3796,6 +3981,10 @@ class Compare : public Expression {
         : m_left(std::move(left))
         , m_right(std::move(right))
     {
+        m_left_is_const = m_left->has_constant_evaluation();
+        if (m_left_is_const) {
+            m_left->evaluate(-1/*unused*/, m_left_value);
+        }
     }
 
     // See comment in base class
@@ -3805,6 +3994,30 @@ class Compare : public Expression {
         m_right->set_base_table(table);
     }
 
+    double init() override
+    {
+        double dT = m_left_is_const ? 10.0 : 50.0;
+        if (std::is_same<TCond, Equal>::value && m_left_is_const && m_right->has_search_index()) {
+            if (m_left_value.m_storage.is_null(0)) {
+                m_matches = m_right->find_all(util::Optional<Mixed>());
+            }
+            else {
+                m_matches = m_right->find_all(get_mixed(m_left_value));
+            }
+            // Sort
+            std::sort(m_matches.begin(), m_matches.end());
+            // Remove all duplicates
+            m_matches.erase(std::unique(m_matches.begin(), m_matches.end()), m_matches.end());
+
+            m_has_matches = true;
+            m_index_get = 0;
+            m_index_end = m_matches.size();
+            dT = 0;
+        }
+
+        return dT;
+    }
+
     void verify_column() const override
     {
         m_left->verify_column();
@@ -3812,8 +4025,7 @@ class Compare : public Expression {
     }
 
     // Recursively fetch tables of columns in expression tree. Used when user first builds a stand-alone expression
-    // and
-    // binds it to a Query at a later time
+    // and binds it to a Query at a later time
     const Table* get_base_table() const override
     {
         const Table* l = m_left->get_base_table();
@@ -3828,14 +4040,43 @@ class Compare : public Expression {
 
     size_t find_first(size_t start, size_t end) const override
     {
+        if (m_has_matches) {
+            if (m_index_end == 0)
+                return not_found;
+
+            if (start <= m_index_last_start)
+                m_index_get = 0;
+            else
+                m_index_last_start = start;
+
+            while (m_index_get < m_index_end) {
+                size_t ndx = m_matches[m_index_get];
+                if (ndx >= end) {
+                    break;
+                }
+                m_index_get++;
+                if (ndx >= start) {
+                    return ndx;
+                }
+            }
+            return not_found;
+        }
+
         size_t match;
-        Value<T> right;
+
         Value<T> left;
+        Value<T> right;
 
         for (; start < end;) {
-            m_left->evaluate(start, left);
-            m_right->evaluate(start, right);
-            match = Value<T>::template compare<TCond>(&left, &right);
+            if (m_left_is_const) {
+                m_right->evaluate(start, right);
+                match = Value<T>::template compare_const<TCond>(&m_left_value, &right);
+            }
+            else {
+                m_left->evaluate(start, left);
+                m_right->evaluate(start, right);
+                match = Value<T>::template compare<TCond>(&left, &right);
+            }
 
             if (match != not_found && match + start < end)
                 return start + match;
@@ -3882,11 +4123,23 @@ class Compare : public Expression {
     Compare(const Compare& other, QueryNodeHandoverPatches* patches)
         : m_left(other.m_left->clone(patches))
         , m_right(other.m_right->clone(patches))
+        , m_left_is_const(other.m_left_is_const)
     {
+        if (m_left_is_const) {
+            m_left->evaluate(-1/*unused*/, m_left_value);
+        }
     }
 
     std::unique_ptr<TLeft> m_left;
     std::unique_ptr<TRight> m_right;
+    bool m_left_is_const;
+    Value<T> m_left_value;
+    bool m_has_matches = false;
+    std::vector<size_t> m_matches;
+    mutable size_t m_index_get = 0;
+    mutable size_t m_index_last_start = 0;
+    size_t m_index_end = 0;
 };
+
 }
 #endif // REALM_QUERY_EXPRESSION_HPP
diff --git a/Pods/Realm/include/core/realm/replication.hpp b/Pods/Realm/include/core/realm/replication.hpp
index 4cb024f..92a5782 100644
--- a/Pods/Realm/include/core/realm/replication.hpp
+++ b/Pods/Realm/include/core/realm/replication.hpp
@@ -59,6 +59,34 @@ class Replication : public _impl::TransactLogConvenientEncoder, protected _impl:
     class Interrupted; // Exception
     class SimpleIndexTranslator;
 
+    enum class TransactionType { trans_Read, trans_Write };
+
+    /// CAUTION: These values are stored in Realm files, so value reassignment
+    /// is not allowed.
+    enum HistoryType {
+        /// No history available. No support for either continuous transactions
+        /// or inter-client synchronization.
+        hist_None = 0,
+
+        /// Out-of-Realm history supporting continuous transactions.
+        ///
+        /// NOTE: This history type is no longer in use. The value needs to stay
+        /// reserved in case someone tries to open an old Realm file.
+        hist_OutOfRealm = 1,
+
+        /// In-Realm history supporting continuous transactions
+        /// (make_in_realm_history()).
+        hist_InRealm = 2,
+
+        /// In-Realm history supporting continuous transactions and client-side
+        /// synchronization protocol (realm::sync::ClientHistory).
+        hist_SyncClient = 3,
+
+        /// In-Realm history supporting continuous transactions and server-side
+        /// synchronization protocol (realm::_impl::ServerHistory).
+        hist_SyncServer = 4
+    };
+
     virtual std::string get_database_path() const = 0;
 
     /// Called during construction of the associated SharedGroup object.
@@ -173,7 +201,7 @@ class Replication : public _impl::TransactLogConvenientEncoder, protected _impl:
     /// \throw Interrupted Thrown by initiate_transact() and prepare_commit() if
     /// a blocking operation was interrupted.
 
-    void initiate_transact(version_type current_version, bool history_updated);
+    void initiate_transact(TransactionType transaction_type, version_type current_version, bool history_updated);
     version_type prepare_commit(version_type current_version);
     void finalize_commit() noexcept;
     void abort_transact() noexcept;
@@ -217,32 +245,6 @@ class Replication : public _impl::TransactLogConvenientEncoder, protected _impl:
     /// or ended prematurely.
     static void apply_changeset(InputStream& changeset, Group& group, util::Logger* logger = nullptr);
 
-    /// CAUTION: These values are stored in Realm files, so value reassignment
-    /// is not allowed.
-    enum HistoryType {
-        /// No history available. No support for either continuous transactions
-        /// or inter-client synchronization.
-        hist_None = 0,
-
-        /// Out-of-Realm history supporting continuous transactions.
-        ///
-        /// NOTE: This history type is no longer in use. The value needs to stay
-        /// reserved in case someone tries to open an old Realm file.
-        hist_OutOfRealm = 1,
-
-        /// In-Realm history supporting continuous transactions
-        /// (make_in_realm_history()).
-        hist_InRealm = 2,
-
-        /// In-Realm history supporting continuous transactions and client-side
-        /// synchronization protocol (realm::sync::ClientHistory).
-        hist_SyncClient = 3,
-
-        /// In-Realm history supporting continuous transactions and server-side
-        /// synchronization protocol (realm::_impl::ServerHistory).
-        hist_SyncServer = 4
-    };
-
     /// Returns the type of history maintained by this Replication
     /// implementation, or \ref hist_None if no history is maintained by it.
     ///
@@ -363,7 +365,7 @@ class Replication : public _impl::TransactLogConvenientEncoder, protected _impl:
     /// changeset during the next invocation of do_initiate_transact() if
     /// `current_version` indicates that the previous transaction failed.
 
-    virtual void do_initiate_transact(version_type current_version, bool history_updated) = 0;
+    virtual void do_initiate_transact(TransactionType, version_type current_version) = 0;
     virtual version_type do_prepare_commit(version_type orig_version) = 0;
     virtual void do_finalize_commit() noexcept = 0;
     virtual void do_abort_transact() noexcept = 0;
@@ -405,12 +407,10 @@ class TrivialReplication : public Replication {
 
     static void apply_changeset(const char* data, size_t size, SharedGroup& target, util::Logger* logger = nullptr);
 
-    bool is_history_updated() const noexcept;
-
     BinaryData get_uncommitted_changes() const noexcept;
 
     void initialize(SharedGroup&) override;
-    void do_initiate_transact(version_type, bool) override;
+    void do_initiate_transact(TransactionType, version_type) override;
     version_type do_prepare_commit(version_type orig_version) override;
     void do_finalize_commit() noexcept override;
     void do_abort_transact() noexcept override;
@@ -422,7 +422,6 @@ class TrivialReplication : public Replication {
 private:
     const std::string m_database_file;
     util::Buffer<char> m_transact_log_buffer;
-    bool m_history_updated;
     void internal_transact_log_reserve(size_t, char** new_begin, char** new_end);
 
     size_t transact_log_size();
@@ -436,9 +435,13 @@ inline Replication::Replication()
 {
 }
 
-inline void Replication::initiate_transact(version_type current_version, bool history_updated)
+inline void Replication::initiate_transact(TransactionType transaction_type, version_type current_version,
+                                           bool history_updated)
 {
-    do_initiate_transact(current_version, history_updated);
+    if (auto hist = get_history()) {
+        hist->set_updated(history_updated);
+    }
+    do_initiate_transact(transaction_type, current_version);
     reset_selection_caches();
 }
 
@@ -477,11 +480,6 @@ inline TrivialReplication::TrivialReplication(const std::string& database_file)
 {
 }
 
-inline bool TrivialReplication::is_history_updated() const noexcept
-{
-    return m_history_updated;
-}
-
 inline BinaryData TrivialReplication::get_uncommitted_changes() const noexcept
 {
     const char* data = m_transact_log_buffer.data();
diff --git a/Pods/Realm/include/core/realm/row.hpp b/Pods/Realm/include/core/realm/row.hpp
index c1439b7..66b7c58 100644
--- a/Pods/Realm/include/core/realm/row.hpp
+++ b/Pods/Realm/include/core/realm/row.hpp
@@ -236,7 +236,7 @@ class Group;
 class RowBase {
 protected:
     TableRef m_table; // nullptr if detached.
-    size_t m_row_ndx; // Undefined if detached.
+    size_t m_row_ndx = -1; // Undefined if detached.
 
     void attach(Table*, size_t row_ndx) noexcept;
     void reattach(Table*, size_t row_ndx) noexcept;
diff --git a/Pods/Realm/include/core/realm/sync/changeset.hpp b/Pods/Realm/include/core/realm/sync/changeset.hpp
index 66d97be..7a79240 100644
--- a/Pods/Realm/include/core/realm/sync/changeset.hpp
+++ b/Pods/Realm/include/core/realm/sync/changeset.hpp
@@ -48,7 +48,7 @@ struct Changeset {
     using timestamp_type = uint_fast64_t;
     using file_ident_type = uint_fast64_t;
     using version_type = uint_fast64_t; // FIXME: Get from `History`.
-    using StringBuffer = util::BasicStringBuffer<AllocationMetric>;
+    using StringBuffer = util::BasicStringBuffer<MeteredAllocator>;
 
     Changeset();
     struct share_buffers_tag {};
@@ -59,6 +59,7 @@ struct Changeset {
     Changeset& operator=(const Changeset&) = delete;
 
     InternString intern_string(StringData); // Slow!
+    InternString find_string(StringData) const noexcept; // Slow!
     StringData string_data() const noexcept;
 
     StringBuffer& string_buffer() noexcept;
@@ -160,10 +161,28 @@ struct Changeset {
     /// version produced by this changeset on the client on which this changeset
     /// originated, but may for instance be the version produced on the server
     /// after receiving and re-sending this changeset to another client.
+    ///
+    /// FIXME: The explanation above is confusing. The truth is that if this
+    /// changeset was received by a client from the server, then \a version is
+    /// the version that was produced on the server by this changeset.
+    ///
+    /// FIXME: This property, as well as \a last_integrated_remote_version, \a
+    /// origin_timestamp, and \a origin_file_ident should probably be removed
+    /// from this class, as they are not a logical part of a changeset, and also
+    /// are difficult to document without knowing more about what context the
+    /// changeset object occurs. Also, functions such as
+    /// InstructionApplier::apply() that a changeset as argument, but do not
+    /// care about those properties.
     version_type version = 0;
 
     /// On clients, the last integrated server version. On the server, this is
     /// the last integrated client version.
+    ///
+    /// FIXME: The explanation above is confusing. The truth is that if this
+    /// changeset was received by a client from the server, then \a
+    /// last_integrated_remote_version is the last client version that was
+    /// integrated by the server at the server version referencened by \a
+    /// version.
     version_type last_integrated_remote_version = 0;
 
     /// Timestamp at origin when the original untransformed changeset was
@@ -218,6 +237,7 @@ struct Changeset {
         void insert(size_t position, Instruction instr);
         void erase(size_t position);
         size_t size() const noexcept;
+        bool is_empty() const noexcept;
 
         Instruction& at(size_t pos) noexcept;
         const Instruction& at(size_t pos) const noexcept;
@@ -255,7 +275,6 @@ struct Changeset::IteratorImpl {
     using difference_type = std::ptrdiff_t;
 
     IteratorImpl() : m_pos(0) {}
-    IteratorImpl(const IteratorImpl& other) : m_inner(other.m_inner), m_pos(other.m_pos) {}
     template <bool is_const_ = is_const>
     IteratorImpl(const IteratorImpl<false>& other, std::enable_if_t<is_const_>* = nullptr)
         : m_inner(other.m_inner), m_pos(other.m_pos) {}
@@ -590,7 +609,7 @@ inline Changeset::iterator Changeset::erase_stable(const_iterator cpos)
     if (pos.m_pos >= pos.m_inner->size()) {
         do {
             ++pos.m_inner;
-        } while (pos.m_inner != end && pos.m_inner->size() == 0);
+        } while (pos.m_inner != end && pos.m_inner->is_empty());
         pos.m_pos = 0;
     }
     return pos;
@@ -630,6 +649,14 @@ inline size_t Changeset::InstructionContainer::size() const noexcept
     return 1;
 }
 
+inline bool Changeset::InstructionContainer::is_empty() const noexcept
+{
+    if (is_multi()) {
+        return get_multi().instructions.empty();
+    }
+    return false;
+}
+
 inline Instruction& Changeset::InstructionContainer::at(size_t pos) noexcept
 {
     REALM_ASSERT(pos < size());
diff --git a/Pods/Realm/include/core/realm/sync/changeset_encoder.hpp b/Pods/Realm/include/core/realm/sync/changeset_encoder.hpp
index 0bff586..5c3618a 100644
--- a/Pods/Realm/include/core/realm/sync/changeset_encoder.hpp
+++ b/Pods/Realm/include/core/realm/sync/changeset_encoder.hpp
@@ -29,7 +29,7 @@ namespace realm {
 namespace sync {
 
 struct ChangesetEncoder: InstructionHandler {
-    using Buffer = util::AppendBuffer<char, AllocationMetric>;
+    using Buffer = util::AppendBuffer<char, MeteredAllocator>;
 
     Buffer release() noexcept;
     void reset() noexcept;
@@ -61,7 +61,6 @@ struct ChangesetEncoder: InstructionHandler {
     void append_bytes(const void*, size_t);
 
     template<class T> void append_int(T);
-    template<class T> char* encode_int(char* buffer, T value);
     void append_payload(const Instruction::Payload&);
     void append_value(DataType);
     void append_value(bool);
@@ -76,7 +75,7 @@ struct ChangesetEncoder: InstructionHandler {
     void append_value(Timestamp);
 
     Buffer m_buffer;
-    util::metered::unordered_map<std::string, uint32_t> m_intern_strings_rev;
+    util::metered::map<std::string, uint32_t> m_intern_strings_rev;
     StringData m_string_range;
 };
 
@@ -109,10 +108,10 @@ inline StringData ChangesetEncoder::get_string(StringBufferRange range) const no
 }
 
 template <class Allocator>
-void encode_changeset(const Changeset& log, util::AppendBuffer<char, Allocator>& out_buffer)
+void encode_changeset(const Changeset& changeset, util::AppendBuffer<char, Allocator>& out_buffer)
 {
     ChangesetEncoder encoder;
-    encoder.encode_single(log); // Throws
+    encoder.encode_single(changeset); // Throws
     auto& buffer = encoder.buffer();
     out_buffer.append(buffer.data(), buffer.size()); // Throws
 }
diff --git a/Pods/Realm/include/core/realm/sync/client.hpp b/Pods/Realm/include/core/realm/sync/client.hpp
index 316118a..f5e477b 100644
--- a/Pods/Realm/include/core/realm/sync/client.hpp
+++ b/Pods/Realm/include/core/realm/sync/client.hpp
@@ -28,6 +28,7 @@
 #include <exception>
 #include <string>
 
+#include <realm/util/buffer.hpp>
 #include <realm/util/logger.hpp>
 #include <realm/util/network.hpp>
 #include <realm/impl/cont_transact_hist.hpp>
@@ -37,18 +38,6 @@
 namespace realm {
 namespace sync {
 
-/// Supported protocols:
-///
-///      Protocol    URL scheme     Default port
-///     -----------------------------------------------------------------------------------
-///      realm       "realm:"       7800 (80 if Client::Config::enable_default_port_hack)
-///      realm_ssl   "realms:"      7801 (443 if Client::Config::enable_default_port_hack)
-///
-enum class Protocol {
-    realm,
-    realm_ssl
-};
-
 
 class Client {
 public:
@@ -77,15 +66,10 @@ class Client {
     using port_type = util::network::Endpoint::port_type;
     using RoundtripTimeHandler = void(milliseconds_type roundtrip_time);
 
-    // FIXME: The default values for `connect_timeout`, `ping_keepalive_period`,
-    // and `pong_keepalive_timeout` ought to be much lower (2 minutes, 1 minute,
-    // and 2 minutes) than they are. Their current values are due to the fact
-    // that the server is single threaded, and that some operations take more
-    // than 5 minutes to complete.
-    static constexpr milliseconds_type default_connect_timeout        = 600000; // 10 minutes
+    static constexpr milliseconds_type default_connect_timeout        = 120000; // 2 minutes
     static constexpr milliseconds_type default_connection_linger_time =  30000; // 30 seconds
-    static constexpr milliseconds_type default_ping_keepalive_period  = 600000; // 10 minutes
-    static constexpr milliseconds_type default_pong_keepalive_timeout = 600000; // 10 minutes
+    static constexpr milliseconds_type default_ping_keepalive_period  =  60000; // 1 minute
+    static constexpr milliseconds_type default_pong_keepalive_timeout = 120000; // 2 minutes
     static constexpr milliseconds_type default_fast_reconnect_limit   =  60000; // 1 minute
 
     struct Config {
@@ -158,6 +142,9 @@ class Client {
         /// file. Received DOWNLOAD messages will be accepted, but otherwise
         /// ignored. No UPLOAD messages will be generated. For testing purposes
         /// only.
+        ///
+        /// Many operations, such as serialized transactions, are not suppored
+        /// in this mode.
         bool dry_run = false;
 
         /// The default changeset cooker to be used by new sessions. Can be
@@ -237,13 +224,13 @@ class Client {
         /// For testing purposes only.
         bool disable_upload_activation_delay = false;
 
-        /// If enable_upload_log_compaction is true, every changeset will be
+        /// If `disable_upload_compaction` is true, every changeset will be
         /// compacted before it is uploaded to the server. Compaction will
         /// reduce the size of a changeset if the same field is set multiple
         /// times or if newly created objects are deleted within the same
         /// transaction. Log compaction increeses CPU usage and memory
         /// consumption.
-        bool enable_upload_log_compaction = true;
+        bool disable_upload_compaction = false;
 
         /// Set the `TCP_NODELAY` option on all TCP/IP sockets. This disables
         /// the Nagle algorithm. Disabling it, can in some cases be used to
@@ -257,6 +244,12 @@ class Client {
         /// called by the client's event loop thread, i.e., the thread that
         /// calls `Client::run()`. This feature is mainly for testing purposes.
         std::function<RoundtripTimeHandler> roundtrip_time_handler;
+
+        /// Disable sync to disk (fsync(), msync()) for all realm files managed
+        /// by this client.
+        ///
+        /// Testing/debugging feature. Should never be enabled in production.
+        bool disable_sync_to_disk = false;
     };
 
     /// \throw util::EventLoop::Implementation::NotAvailable if no event loop
@@ -322,8 +315,8 @@ class Client {
     bool wait_for_session_terminations_or_client_stopped();
 
     /// Returns false if the specified URL is invalid.
-    bool decompose_server_url(const std::string& url, Protocol& protocol, std::string& address,
-                              port_type& port, std::string& path) const;
+    bool decompose_server_url(const std::string& url, ProtocolEnvelope& protocol,
+                              std::string& address, port_type& port, std::string& path) const;
 
 private:
     class Impl;
@@ -400,6 +393,9 @@ class Session {
                                  std::uint_fast64_t progress_version,
                                  std::uint_fast64_t snapshot_version);
     using WaitOperCompletionHandler = std::function<void(std::error_code)>;
+    using SerialTransactChangeset = util::Buffer<char>;
+    using SerialTransactInitiationHandler = std::function<void(std::error_code)>;
+    using SerialTransactCompletionHandler = std::function<void(std::error_code, bool accepted)>;
     using SSLVerifyCallback = bool(const std::string& server_address,
                                    port_type server_port,
                                    const char* pem_data,
@@ -416,8 +412,8 @@ class Session {
         std::string server_address = "localhost";
 
         /// server_port is the port at which the server listens. If server_port
-        /// is zero, the default port for the specified protocol is used. See \ref
-        /// Protocol for information on default ports.
+        /// is zero, the default port for the specified protocol is used. See
+        /// ProtocolEnvelope for information on default ports.
         port_type server_port = 0;
 
         /// server_path is  the virtual path by which the server identifies the
@@ -433,8 +429,9 @@ class Session {
         /// virtual paths from actual file system paths.
         std::string server_path = "/";
 
-        /// The protocol used for communicating with the server. See \ref Protocol.
-        Protocol protocol = Protocol::realm;
+        /// The protocol used for communicating with the server. See
+        /// ProtocolEnvelope.
+        ProtocolEnvelope protocol_envelope = ProtocolEnvelope::realm;
 
         /// url_prefix is a prefix that is prepended to the server_path
         /// in the HTTP GET request that initiates a sync connection. The value
@@ -468,9 +465,8 @@ class Session {
         /// for partitioning the sessions.
         std::string multiplex_ident;
 
-        /// verify_servers_ssl_certificate controls whether the server
-        /// certificate is verified for SSL connections. It should generally be
-        /// true in production.
+        /// Controls whether the server certificate is verified for SSL
+        /// connections. It should generally be true in production.
         bool verify_servers_ssl_certificate = true;
 
         /// ssl_trust_certificate_path is the path of a trust/anchor
@@ -488,7 +484,7 @@ class Session {
         /// If ssl_trust_certificate_path is None (default), ssl_verify_callback
         /// (see below) is used if set, and the default device trust/anchor
         /// store is used otherwise.
-        Optional<std::string> ssl_trust_certificate_path;
+        util::Optional<std::string> ssl_trust_certificate_path;
 
         /// If Client::Config::ssl_verify_callback is set, that function is called
         /// to verify the certificate, unless verify_servers_ssl_certificate is
@@ -566,14 +562,134 @@ class Session {
         std::shared_ptr<ClientHistory::ChangesetCooker> changeset_cooker;
 
         /// The encryption key the SharedGroup will be opened with.
-        Optional<std::array<char, 64>> encryption_key;
+        util::Optional<std::array<char, 64>> encryption_key;
+
+        /// ClientReset is used for both async open and client reset. If
+        /// client_reset is not util::none, the sync client will perform
+        /// async open for this session if the local Realm does not exist, and
+        /// client reset if the local Realm exists. If client_reset is
+        /// util::none, an ordinary sync session will take place.
+        ///
+        /// A session will perform async open by downloading a state Realm, and
+        /// some metadata, from the server, patching up the metadata part of
+        /// the Realm and finally move the downloaded Realm into the path of
+        /// the local Realm. After completion of async open, the application
+        /// can open and use the Realm.
+        ///
+        /// A session will perform client reset by downloading a state Realm, and
+        /// some metadata, from the server. After download, the state Realm will
+        /// be integrated into the local Realm in a write transaction. The
+        /// application is free to use the local realm during the entire client
+        /// reset. Like a DOWNLOAD message, the application will not be able
+        /// to perform a write transaction at the same time as the sync client
+        /// performs its own write transaction. Client reset is not more
+        /// disturbing for the application than any DOWNLOAD message. The
+        /// application can listen to change notifications from the client
+        /// reset exactly as in a DOWNLOAD message.
+        ///
+        /// The client reset will recover non-uploaded changes in the local
+        /// Realm if and only if 'recover_local_changes' is true. In case,
+        /// 'recover_local_changes' is false, the local Realm state will hence
+        /// be set to the server's state (server wins).
+        ///
+        /// Async open and client reset require a private directory for
+        /// metadata. This directory must be specified in the option
+        /// 'metadata_dir'. The metadata_dir must not be touched during async
+        /// open or client reset. The metadata_dir can safely be removed at
+        /// times where async open or client reset do not take place. The sync
+        /// client attempts to clean up metadata_dir. The metadata_dir can be
+        /// reused across app restarts to resume an interrupted download. It is
+        /// recommended to leave the metadata_dir unchanged except when it is
+        /// known that async open or client reset is done.
+        ///
+        /// The recommended usage of async open is to use it for the initial
+        /// bootstrap if Realm usage is not needed until after the server state
+        /// has been downloaded.
+        ///
+        /// The recommended usage of client reset is after a previous session
+        /// encountered an error that implies the need for a client reset. It
+        /// is not recommended to persist the need for a client reset. The
+        /// application should just attempt to synchronize in the usual fashion
+        /// and only after hitting an error, start a new session with a client
+        /// reset. In other words, if the application crashes during a client reset,
+        /// the application should attempt to perform ordinary synchronization
+        /// after restart and switch to client reset if needed.
+        ///
+        /// Error codes that imply the need for a client reset are the session
+        /// level error codes:
+        ///
+        /// bad_client_file_ident        = 208, // Bad client file identifier (IDENT)
+        /// bad_server_version           = 209, // Bad server version (IDENT, UPLOAD)
+        /// bad_client_version           = 210, // Bad client version (IDENT, UPLOAD)
+        /// diverging_histories          = 211, // Diverging histories (IDENT)
+        ///
+        /// However, other errors such as bad changeset (UPLOAD) could also be resolved
+        /// with a client reset. Client reset can even be used without any prior error
+        /// if so desired.
+        ///
+        /// After completion of async open and client reset, the sync client
+        /// will continue synchronizing with the server in the usual fashion.
+        ///
+        /// The progress of async open and client reset can be tracked with the
+        /// standard progress handler.
+        ///
+        /// Async open and client reset are done when the progress handler
+        /// arguments satisfy "progress_version > 0". However, if the
+        /// application wants to ensure that it has all data present on the
+        /// server, it should wait for download completion using either
+        /// void async_wait_for_download_completion(WaitOperCompletionHandler)
+        /// or
+        /// bool wait_for_download_complete_or_client_stopped().
+        ///
+        /// The option 'require_recent_state_realm' is used for async open to
+        /// request a recent state Realm. A recent state Realm is never empty
+        /// (unless there is no data), and is recent in the sense that it was
+        /// produced by the current incarnation of the server. Recent does not
+        /// mean the absolutely newest possible state Realm, since that might
+        /// lead to too excessive work on the server. Setting
+        /// 'require_recent_state_realm' to true might lead to more work
+        /// performed by the server but it ensures that more data is downloaded
+        /// using async open instead of ordinary synchronization. It is
+        /// recommended to set 'require_recent_state_realm' to true. Client
+        /// reset always downloads a recent state Realm.
+        struct ClientReset {
+            std::string metadata_dir;
+            bool recover_local_changes = true;
+            bool require_recent_state_realm = true;
+        };
+        util::Optional<ClientReset> client_reset_config;
+
+        struct ProxyConfig {
+            enum class Type { HTTP, HTTPS } type;
+            std::string address;
+            port_type port;
+        };
+        util::Optional<ProxyConfig> proxy_config;
+
+        /// Set to true to disable the upload process for this session. This
+        /// includes the sending of empty UPLOAD messages.
+        ///
+        /// This feature exists exclusively for testing purposes at this time.
+        bool disable_upload = false;
+
+        /// Set to true to disable sending of empty UPLOAD messages for this
+        /// session.
+        ///
+        /// This feature exists exclusively for testing purposes at this time.
+        bool disable_empty_upload = false;
+
+        /// Set to true to cause the integration of the first received changeset
+        /// (in a DOWNLOAD message) to fail.
+        ///
+        /// This feature exists exclusively for testing purposes at this time.
+        bool simulate_integration_error = false;
     };
 
     /// \brief Start a new session for the specified client-side Realm.
     ///
-    /// Note that the session is not fully activated until you call bind(). Also
-    /// note that if you call set_sync_transact_callback(), it must be done
-    /// before calling bind().
+    /// Note that the session is not fully activated until you call bind().
+    /// Also note that if you call set_sync_transact_callback(), it must be
+    /// done before calling bind().
     ///
     /// \param realm_path The file-system path of a local client-side Realm
     /// file.
@@ -651,8 +767,8 @@ class Session {
     ///          uint_fast64_t progress_version);
     ///
     /// downloaded_bytes is the size in bytes of all downloaded changesets.
-    /// downloadable_bytes is the size in bytes of the part of the server
-    /// history that do not originate from this client.
+    /// downloadable_bytes is equal to downloaded_bytes plus an estimate of
+    /// the size of the remaining server history.
     ///
     /// uploaded_bytes is the size in bytes of all locally produced changesets
     /// that have been received and acknowledged by the server.
@@ -673,11 +789,10 @@ class Session {
     ///     bool download_complete = (downloaded_bytes == downloadable_bytes);
     ///
     /// However, download completion might never be reached because the server
-    /// can receive new changesets from other clients.
-    /// An alternative strategy is to cache downloadable_bytes from the callback,
-    /// and use the cached value as the threshold.
-    ///
-    ///     bool download_complete = (downloaded_bytes == cached_downloadable_bytes);
+    /// can receive new changesets from other clients. downloadable_bytes can
+    /// decrease for two reasons: server side compaction and changesets of
+    /// local origin. Code using downloadable_bytes must not assume that it
+    /// is increasing.
     ///
     /// Upload progress can be calculated by caching an initial value of
     /// uploaded_bytes from the last, or next, callback. Then
@@ -819,7 +934,7 @@ class Session {
     /// The two other forms of bind() are convenience functions.
     /// void bind(std::string server_address, std::string server_path,
     ///           std::string signed_user_token, port_type server_port = 0,
-    ///           Protocol protocol = Protocol::realm);
+    ///           ProtocolEnvelope protocol = ProtocolEnvelope::realm);
     /// replaces the corresponding parameters from the Session::Config object
     /// before the session is bound.
     /// void bind(std::string server_url, std::string signed_user_token) parses
@@ -827,22 +942,23 @@ class Session {
     /// before the session is bound.
     ///
     /// \param server_url For example "realm://sync.realm.io/test". See
-    /// server_address, server_path, and server_port in Session::Config for information
-    /// about the individual components of the URL. See \ref Protocol for the list of
-    /// available URL schemes and the associated default ports.
+    /// server_address, server_path, and server_port in Session::Config for
+    /// information about the individual components of the URL. See
+    /// ProtocolEnvelope for the list of available URL schemes and the
+    /// associated default ports.
     ///
     /// \throw BadServerUrl if the specified server URL is malformed.
     void bind();
     void bind(std::string server_url, std::string signed_user_token);
     void bind(std::string server_address, std::string server_path,
               std::string signed_user_token, port_type server_port = 0,
-              Protocol protocol = Protocol::realm);
+              ProtocolEnvelope protocol = ProtocolEnvelope::realm);
     /// @}
 
     /// \brief Refresh the access token associated with this session.
     ///
     /// This causes the REFRESH protocol message to be sent to the server. See
-    /// \ref Protocol. It is an error to pass a token with a different user
+    /// ProtocolEnvelope. It is an error to pass a token with a different user
     /// identity than the token used to initiate the session.
     ///
     /// In an on-going session the application may expect the access token to
@@ -868,7 +984,7 @@ class Session {
     /// Note: This function is thread-safe.
     ///
     /// \param signed_user_token A cryptographically signed token describing the
-    /// identity and access rights of the current user. See \ref Protocol.
+    /// identity and access rights of the current user. See ProtocolEnvelope.
     void refresh(std::string signed_user_token);
 
     /// \brief Inform the synchronization agent about changes of local origin.
@@ -954,7 +1070,7 @@ class Session {
 
     /// @{ \brief Synchronous wait for upload or download completion.
     ///
-    /// These functions are synchronous equivalents to
+    /// These functions are synchronous equivalents of
     /// async_wait_for_upload_completion() and
     /// async_wait_for_download_completion() respectively. This means that they
     /// block the caller until the completion condition is satisfied, or the
@@ -1005,6 +1121,96 @@ class Session {
     /// \brief Change address of server for this session.
     void override_server(std::string address, port_type);
 
+    /// \brief Initiate a serialized transaction.
+    ///
+    /// Asynchronously waits for completion of any serialized transactions, that
+    /// are already in progress via the same session object, then waits for
+    /// the download process to complete (async_wait_for_download_completion()),
+    /// then pauses the upload process. The upload process will be resumed when
+    /// async_try_complete_serial_transact() or abort_serial_transact() is
+    /// called.
+    ///
+    /// Changesets produced by local transactions, that are committed after the
+    /// completion of the initiation of a serialized transaction, are guaranteed
+    /// to not be uploaded until after (or during) the completion of that
+    /// serialized transaction (async_try_complete_serial_transact()).
+    ///
+    /// If the initiation of a serialized transaction is successfully completed,
+    /// that is, if the specified handler gets called with an std::error_code
+    /// argument that evaluates to false in a boolean context, then the
+    /// application is required to eventually call
+    /// async_try_complete_serial_transact() to complete the transaction, or
+    /// abort_serial_transact() to abort it. If
+    /// async_try_complete_serial_transact() fails (throws), the application is
+    /// required to follow up with a call to abort_serial_transact().
+    ///
+    /// If the session object is destroyed before initiation process completes,
+    /// the specified handler will be called with error
+    /// `util::error::operation_aborted`. Currently, this is the only possible
+    /// error that can be reported through this handler.
+    ///
+    /// This feature is only available when the server supports version 28, or
+    /// later, of the synchronization protocol. See
+    /// get_current_protocol_version().
+    ///
+    /// This feature is not currently supported with Partial Synchronization,
+    /// and in a server cluster, it is currently only supported on the root
+    /// node.
+    void async_initiate_serial_transact(SerialTransactInitiationHandler);
+
+    /// \brief Complete a serialized transaction.
+    ///
+    /// Initiate the completion of the serialized transaction. This involves
+    /// sending the specified changeset to the server, and waiting for the
+    /// servers response.
+    ///
+    /// If the session object is destroyed before completion process completes,
+    /// the specified handler will be called with error
+    /// `util::error::operation_aborted`.
+    ///
+    /// Otherwise, if the server does not support serialized transactions, the
+    /// specified handler will be called with error
+    /// `util::MiscExtErrors::operation_not_supported`. This happens if the
+    /// negotiated protocol version is too old, if serialized transactions are
+    /// disallowed by the server, or if it is not allowed for the Realm file in
+    /// question (partial synchronization).
+    ///
+    /// Otherwise, the specified handler will be called with an error code
+    /// argument that evaluates to false in a boolean context, and the
+    /// `accepted` argument will be true if, and only if the transaction was
+    /// accepted by the server.
+    ///
+    /// \param upload_anchor The upload cursor associated with the snapshot on
+    /// which the specified changeset is based. Use
+    /// sync::ClientHistory::get_upload_anchor_of_current_transact() to obtain
+    /// it. Note that
+    /// sync::ClientHistory::get_upload_anchor_of_current_transact() needs to be
+    /// called during the transaction that is used to produce the changeset of
+    /// the serialized transaction.
+    ///
+    /// \param changeset A changeset obtained from an aborted transaction on the
+    /// Realm file associated with this session. Use
+    /// sync::ClientHistory::get_sync_changeset() to obtain it. The transaction,
+    /// which is used to produce teh changeset, needs to be rolled back rather
+    /// than committed, because the decision of whether to accept the changes
+    /// need to be delegated to the server. Note that
+    /// sync::ClientHistory::get_sync_Changeset_of_current_transact() needs to
+    /// be called at the end of the transaction, that is used to produce the
+    /// changeset, but before the rollback operation.
+    void async_try_complete_serial_transact(UploadCursor upload_anchor,
+                                            SerialTransactChangeset changeset,
+                                            SerialTransactCompletionHandler);
+
+    /// \brief Abort a serialized transaction.
+    ///
+    /// Must be called if async_try_complete_serial_transact() fails, i.e., if
+    /// it throws, or if async_try_complete_serial_transact() is not called at
+    /// all. Must not be called if async_try_complete_serial_transact()
+    /// succeeds, i.e., if it does not throw.
+    ///
+    /// Will resume upload process.
+    void abort_serial_transact() noexcept;
+
 private:
     class Impl;
     Impl* m_impl = nullptr;
@@ -1045,12 +1251,23 @@ enum class Client::Error {
     bad_file_ident              = 120, ///< Bad file identifier (ALLOC)
     connect_timeout             = 121, ///< Sync connection was not fully established in time
     bad_timestamp               = 122, ///< Bad timestamp (PONG)
+    bad_protocol_from_server    = 123, ///< Bad or missing protocol version information from server
+    client_too_old_for_server   = 124, ///< Protocol version negotiation failed: Client is too old for server
+    client_too_new_for_server   = 125, ///< Protocol version negotiation failed: Client is too new for server
+    protocol_mismatch           = 126, ///< Protocol version negotiation failed: No version supported by both client and server
+    bad_state_message           = 127, ///< Bad values in state message (STATE)
+    missing_protocol_feature    = 128, ///< Requested feature missing in negotiated protocol version
+    bad_serial_transact_status  = 129, ///< Bad status of serialized transaction (TRANSACT)
+    bad_object_id_substitutions = 130, ///< Bad encoded object identifier substitutions (TRANSACT)
+    http_tunnel_failed          = 131, ///< Failed to establish HTTP tunnel with configured proxy
 };
 
 const std::error_category& client_error_category() noexcept;
 
 std::error_code make_error_code(Client::Error) noexcept;
 
+std::ostream& operator<<(std::ostream& os, Session::Config::ProxyConfig::Type);
+
 } // namespace sync
 } // namespace realm
 
diff --git a/Pods/Realm/include/core/realm/sync/fingerprint.hpp b/Pods/Realm/include/core/realm/sync/fingerprint.hpp
new file mode 100644
index 0000000..13b54ab
--- /dev/null
+++ b/Pods/Realm/include/core/realm/sync/fingerprint.hpp
@@ -0,0 +1,53 @@
+/*************************************************************************
+ *
+ * REALM CONFIDENTIAL
+ * __________________
+ *
+ *  [2011] - [2018] Realm Inc
+ *  All Rights Reserved.
+ *
+ * NOTICE:  All information contained herein is, and remains
+ * the property of Realm Incorporated and its suppliers,
+ * if any.  The intellectual and technical concepts contained
+ * herein are proprietary to Realm Incorporated
+ * and its suppliers and may be covered by U.S. and Foreign Patents,
+ * patents in process, and are protected by trade secret or copyright law.
+ * Dissemination of this information or reproduction of this material
+ * is strictly forbidden unless prior written permission is obtained
+ * from Realm Incorporated.
+ *
+ **************************************************************************/
+#ifndef REALM_ENCRYPT_FINGERPRINT_HPP
+#define REALM_ENCRYPT_FINGERPRINT_HPP
+
+#include <string>
+#include <array>
+
+#include <realm/util/optional.hpp>
+
+namespace realm {
+namespace encrypt {
+
+// calculate_fingerprint() calculates, and returns, a fingerprint of an
+// encryption key. The input key can be util::none in order to calculate a
+// fingerprint even in the case of unencrypted Realms.
+//
+// An intruder cannot recover an unknown encryption_key from the fingerprint,
+// and it is safe to save the fingerprint in a file together with the encrypted
+// Realms.
+//
+// calculate_fingerprint() can be considered opaque, but currently the
+// fingerprint is a colon separated hex representation of the SHA-256 hash of
+// the encryption key.
+std::string calculate_fingerprint(const util::Optional<std::array<char, 64>> encryption_key);
+
+// verify_fingerprint() returns true if `fingerprint` was obtained previously
+// from calculate_fingerprint() with `encryption_key` as argument.  Otherwise,
+// verify_fingerprint() returns false with extremely high probability.
+bool verify_fingerprint(const std::string& fingerprint,
+                        const util::Optional<std::array<char, 64>> encryption_key);
+
+} // namespace encrypt
+} // namespace realm
+
+#endif // REALM_ENCRYPT_FINGERPRINT_HPP
diff --git a/Pods/Realm/include/core/realm/sync/history.hpp b/Pods/Realm/include/core/realm/sync/history.hpp
index 6c83c0f..5fc571f 100644
--- a/Pods/Realm/include/core/realm/sync/history.hpp
+++ b/Pods/Realm/include/core/realm/sync/history.hpp
@@ -18,17 +18,32 @@
  *
  **************************************************************************/
 
+#include <cstdint>
 #include <memory>
+#include <chrono>
 #include <string>
 
+#include <realm/util/string_view.hpp>
 #include <realm/impl/cont_transact_hist.hpp>
 #include <realm/sync/instruction_replication.hpp>
 #include <realm/sync/protocol.hpp>
 #include <realm/sync/transform.hpp>
+#include <realm/sync/object_id.hpp>
+#include <realm/sync/instructions.hpp>
 
 #ifndef REALM_SYNC_HISTORY_HPP
 #define REALM_SYNC_HISTORY_HPP
 
+
+namespace realm {
+namespace _impl {
+
+struct ObjectIDHistoryState;
+
+} // namespace _impl
+} // namespace realm
+
+
 namespace realm {
 namespace sync {
 
@@ -45,6 +60,34 @@ struct VersionInfo {
 };
 
 
+struct SerialTransactSubstitutions {
+    struct Class {
+        InternString name;
+        std::size_t substitutions_end;
+    };
+    std::vector<Class> classes;
+    std::vector<std::pair<ObjectID, ObjectID>> substitutions;
+};
+
+
+timestamp_type generate_changeset_timestamp() noexcept;
+
+// FIXME: in C++17, switch to using std::timespec in place of last two
+// arguments.
+void map_changeset_timestamp(timestamp_type, std::time_t& seconds_since_epoch,
+                             long& nanoseconds) noexcept;
+
+
+/// Thrown if changeset cooking is not either consistently on or consistently
+/// off during synchronization (ClientHistory::set_sync_progress() and
+/// ClientHistory::integrate_server_changesets()).
+class InconsistentUseOfCookedHistory;
+
+/// Thrown if a bad server version is passed to
+/// ClientHistory::get_cooked_status().
+class BadCookedServerVersion;
+
+
 class ClientHistoryBase :
         public InstructionReplication {
 public:
@@ -54,22 +97,6 @@ class ClientHistoryBase :
     /// as the client file identifier and the synchronization progress as they
     /// are stored in that snapshot.
     ///
-    /// Note: The value of `progress.upload.last_integrated_server_version` may
-    /// currently be wrong when the caller is the synchronization client
-    /// (`_impl::ClientImplBase`), in the sense that the server version number
-    /// may not actually be the version upon which the client version was based.
-    /// On the client, it must therefore only be used in a limited capacity,
-    /// namely to report download progress to the server. The number reflects a
-    /// lower bound on the server version that any changeset produced by the
-    /// client in the future can be based upon. The caller passes the returned
-    /// value back to find_uploadable_changesets() or set_sync_progress(), so if
-    /// the history implementation does not care about the value of
-    /// `progress.upload.last_integrated_server_version`, it is allowed to not
-    /// persist it. However, the implementation of find_uploadable_changesets()
-    /// must still be prepared for its value to be determined by an incoming
-    /// DOWNLOAD message, rather than being whatever was returned by
-    /// get_status().
-    ///
     /// The returned current client version is the version produced by the last
     /// changeset in the history. The type of version returned here, is the one
     /// that identifies an entry in the sync history. Whether this is the same
@@ -77,12 +104,12 @@ class ClientHistoryBase :
     /// implementation.
     ///
     /// The returned client file identifier is the one that was last stored by
-    /// set_client_file_ident(). If no identifier has been stored yet, the
-    /// `ident` field of \a client_file_ident is set to zero.
+    /// set_client_file_ident(), or `SaltedFileIdent{0, 0}` if
+    /// set_client_file_ident() has never been called.
     ///
     /// The returned SyncProgress is the one that was last stored by
-    /// set_sync_progress(), or {} if set_sync_progress() has never been called
-    /// for the associated Realm file.
+    /// set_sync_progress(), or `SyncProgress{}` if set_sync_progress() has
+    /// never been called.
     virtual void get_status(version_type& current_client_version,
                             SaltedFileIdent& client_file_ident,
                             SyncProgress& progress) const = 0;
@@ -100,51 +127,36 @@ class ClientHistoryBase :
     /// identical identifiers for two client files if they are associated with
     /// different server Realms.
     ///
+    /// \param fix_up_object_ids The object ids that depend on client file ident
+    /// will be fixed in both state and history if this parameter is true. If
+    /// it is known that there are no objects to fix, it can be set to false to
+    /// achieve higher performance.
+    ///
     /// The client is required to obtain the file identifier before engaging in
     /// synchronization proper, and it must store the identifier and use it to
     /// reestablish the connection between the client file and the server file
     /// when engaging in future synchronization sessions.
-    virtual void set_client_file_ident(SaltedFileIdent client_file_ident) = 0;
-
-    /// Stores the SyncProgress progress in the associated Realm file in a way
-    /// that makes it available via get_status() during future synchronization
-    /// sessions. Progress is reported by the server in the DOWNLOAD message.
-    ///
-    /// See struct SyncProgress for a description of \param progress.
-    ///
-    /// Note: The implementation is not obligated to store the value of
-    /// `progress.upload.last_integrated_server_version`, however, if the
-    /// implementation chooses to not store it, then its value will be
-    /// unreliable when passed to the implementation through functions such as
-    /// find_uploadable_changesets(). It may, or may not be the value last
-    /// returned for it by get_status().
-    virtual void set_sync_progress(const SyncProgress& progress, VersionInfo&) = 0;
-
-/*
-    /// Get the first history entry whose changeset produced a version that
-    /// succeeds `begin_version` and, and does not succeed `end_version`, whose
-    /// changeset was not produced by integration of a changeset received from
-    /// the server, and whose changeset was not empty.
-    ///
-    /// \param begin_version, end_version The range of versions to consider. If
-    /// `begin_version` is equal to `end_version`, this is the empty range. If
-    /// `begin_version` is zero, it means that everything preceding
-    /// `end_version` is to be considered, which is again the empty range if
-    /// `end_version` is also zero. Zero is a special value in that no changeset
-    /// produces that version. It is an error if `end_version` precedes
-    /// `begin_version`, or if `end_version` is zero and `begin_version` is not.
-    ///
-    /// \param buffer Owner of memory referenced by entry.changeset upon return.
-    ///
-    /// \return The version produced by the changeset of the located history
-    /// entry, or zero if no history entry exists matching the specified
-    /// criteria.
-    virtual version_type find_history_entry_for_upload(version_type begin_version,
-                                                       version_type end_version,
-                                                       HistoryEntry& entry,
-                                                       std::unique_ptr<char[]>& buffer) const = 0;
-*/
+    virtual void set_client_file_ident(SaltedFileIdent client_file_ident,
+                                       bool fix_up_object_ids) = 0;
 
+    /// Stores the synchronization progress in the associated Realm file in a
+    /// way that makes it available via get_status() during future
+    /// synchronization sessions. Progress is reported by the server in the
+    /// DOWNLOAD message.
+    ///
+    /// See struct SyncProgress for a description of \a progress.
+    ///
+    /// \param downloadable_bytes If specified, and if the implementation cares
+    /// about byte-level progress, this function updates the persistent record
+    /// of the estimate of the number of remaining bytes to be downloaded.
+    ///
+    /// \throw InconsistentUseOfCookedHistory If a changeset cooker has been
+    /// attached to this history object, and the Realm file does not have a
+    /// cooked history, and a cooked history can no longer be added because some
+    /// synchronization has already happened. Or if no changeset cooker has been
+    /// attached, and the Realm file does have a cooked history.
+    virtual void set_sync_progress(const SyncProgress& progress,
+                                   const std::uint_fast64_t* downloadable_bytes, VersionInfo&) = 0;
 
     struct UploadChangeset {
         timestamp_type origin_timestamp;
@@ -181,10 +193,16 @@ class ClientHistoryBase :
     /// reflect a value of UploadChangeset::progress produced by an earlier
     /// invocation of find_uploadable_changesets().
     ///
+    /// Found changesets are added to \a uploadable_changesets.
+    ///
+    /// \param locked_server_version will be set to the value that should be
+    /// used as `<locked server version>` in a DOWNLOAD message.
+    ///
     /// For changesets of local origin, UploadChangeset::origin_file_ident will
     /// be zero.
-    virtual std::vector<UploadChangeset> find_uploadable_changesets(UploadCursor& upload_progress,
-                                                                    version_type end_version) const = 0;
+    virtual void find_uploadable_changesets(UploadCursor& upload_progress, version_type end_version,
+                                            std::vector<UploadChangeset>& uploadable_changesets,
+                                            version_type& locked_server_version) const = 0;
 
     using RemoteChangeset = Transformer::RemoteChangeset;
 
@@ -223,19 +241,32 @@ class ClientHistoryBase :
     /// deemed valid, this function updates \a version_info to reflect the new
     /// version produced by the transaction.
     ///
-    /// \param progress is the SyncProgress received in the download message.
-    /// Progress will be persisted along with the changesets.
+    /// \param progress The synchronization progress is what was received in the
+    /// DOWNLOAD message along with the specified changesets. The progress will
+    /// be persisted along with the changesets.
+    ///
+    /// \param downloadable_bytes If specified, and if the implementation cares
+    /// about byte-level progress, this function updates the persistent record
+    /// of the estimate of the number of remaining bytes to be downloaded.
     ///
     /// \param num_changesets The number of passed changesets. Must be non-zero.
     ///
     /// \param transact_reporter An optional callback which will be called with the
     /// version immediately processing the sync transaction and that of the sync
     /// transaction.
+    ///
+    /// \throw InconsistentUseOfCookedHistory If a changeset cooker has been
+    /// attached to this history object, and the Realm file does not have a
+    /// cooked history, and a cooked history can no longer be added because some
+    /// synchronization has already happened. Or if no changeset cooker has been
+    /// attached, and the Realm file does have a cooked history.
     virtual bool integrate_server_changesets(const SyncProgress& progress,
+                                             const std::uint_fast64_t* downloadable_bytes,
                                              const RemoteChangeset* changesets,
                                              std::size_t num_changesets, VersionInfo& new_version,
                                              IntegrationError& integration_error, util::Logger&,
-                                             SyncTransactReporter* transact_reporter = nullptr) = 0;
+                                             SyncTransactReporter* transact_reporter = nullptr,
+                                             const SerialTransactSubstitutions* = nullptr) = 0;
 
 protected:
     ClientHistoryBase(const std::string& realm_path);
@@ -261,52 +292,138 @@ class ClientHistory : public ClientHistoryBase {
         std::int_fast64_t intrachangeset_progress = 0;
     };
 
-    /// Returns the persisted progress that was last stored by
-    /// set_cooked_progress().
+    /// Get information about the current state of the cooked history including
+    /// the point of progress of its consumption.
+    ///
+    /// \param server_version The server version associated with the last cooked
+    /// changeset that should be skipped. See `/doc/cooked_history.md` for an
+    /// explanation of the rationale behind this. Specifying zero means that no
+    /// changesets should be skipped. It is an error to specify a nonzero server
+    /// version that is not the server version associated with any of of the
+    /// cooked changesets, or to specify a nonzero server version that precedes
+    /// the one, that is associated with the last cooked changeset that was
+    /// marked as consumed. Doing so, will cause BadCookedServerVersion to be
+    /// thrown.
+    ///
+    /// \param num_changesets Set to the total number of produced cooked
+    /// changesets over the lifetime of the Realm file to which this history
+    /// accessor object is attached. This is the number of previously consumed
+    /// changesets plus the number of unconsumed changesets remaining in the
+    /// Realm file.
+    ///
+    /// \param progress The point of progress of the consumption of the cooked
+    /// history. Initially, and until explicitly modified by
+    /// set_cooked_progress(), both `CookedProgress::changeset_index` and
+    /// `CookedProgress::intrachangeset_progress` are zero. If a nonzero value
+    /// was passed for \a server_version, \a progress will be transparently
+    /// adjusted to account for the skipped changesets. See also \a
+    /// num_skipped_changesets. If one or more changesets are skipped,
+    /// `CookedProgress::intrachangeset_progress` will be set to zero.
+    ///
+    /// \param num_skipped_changesets The number of skipped changesets. See also
+    /// \a server_version.
+    ///
+    /// \throw BadCookedServerVersion See \a server_version.
+    virtual void get_cooked_status(version_type server_version, std::int_fast64_t& num_changesets,
+                                   CookedProgress& progress,
+                                   std::int_fast64_t& num_skipped_changesets) const = 0;
+
+    /// Fetch the cooked changeset at the specified index.
+    ///
+    /// Cooked changesets are made available in the order they are produced by
+    /// the changeset cooker (ChangesetCooker).
+    ///
+    /// Behaviour is undefined if the specified index is less than the index
+    /// (CookedProgress::changeset_index) returned by get_cooked_progress(), or
+    /// if it is greater than, or equal to the total number of cooked changesets
+    /// (as returned by get_num_cooked_changesets()).
     ///
-    /// Initially, until explicitly modified, both
-    /// `CookedProgress::changeset_index` and
-    /// `CookedProgress::intrachangeset_progress` are zero.
-    virtual CookedProgress get_cooked_progress() const = 0;
+    /// The callee must append the bytes of the located cooked changeset to the
+    /// specified buffer, which does not have to be empty initially.
+    ///
+    /// \param server_version Will be set to the version produced on the server
+    /// by an earlier form of the retreived changeset. If the cooked changeset
+    /// was produced (as output of cooker) before migration of the client-side
+    /// history compartment to schema version 2, then \a server_version will be
+    /// set to zero instead, because the real value is unkown. Zero is not a
+    /// possible value in any other case.
+    virtual void get_cooked_changeset(std::int_fast64_t index,
+                                      util::AppendBuffer<char>&,
+                                      version_type& server_version) const = 0;
 
     /// Persistently stores the point of progress of the consumer of cooked
     /// changesets.
     ///
-    /// As well as allowing for later retrieval, the specification of the point
-    /// of progress of the consumer of cooked changesets also has the effect of
-    /// trimming obsolete cooked changesets from the Realm file. Indeed, if this
-    /// function is never called, but cooked changesets are continually being
-    /// produced, then the Realm file will grow without bounds.
-    ///
-    /// Behavior is undefined if the specified index
-    /// (CookedProgress::changeset_index) is lower than the index returned by
-    /// get_cooked_progress().
+    /// The changeset index (CookedProgress::changeset_index) is the index (as
+    /// passed to get_cooked_changeset()) of the first unconsumed cooked
+    /// changset. Changesets at lower indexes will no longer be available.
     ///
     /// The intrachangeset progress field
     /// (CookedProgress::intrachangeset_progress) will be faithfully persisted,
     /// but will otherwise be treated as an opaque object by the history
     /// internals.
-    virtual void set_cooked_progress(CookedProgress) = 0;
+    ///
+    /// As well as allowing for later retrieval, the specification of the point
+    /// of progress of the consumer of cooked changesets also has the effect of
+    /// trimming obsolete cooked changesets from the Realm file (i.e., removal
+    /// of all changesets at indexes lower than
+    /// CookedProgress::intrachangeset_progress).  Indeed, if this function is
+    /// never called, but cooked changesets are continually being produced, then
+    /// the Realm file will grow without bounds.
+    ///
+    /// It is an error if the specified index (CookedProgress::changeset_index)
+    /// is lower than the index returned by get_cooked_progress(), and if it is
+    /// higher that the value returned by get_num_cooked_changesets().
+    ///
+    /// \return The snapshot number produced by the transaction performed
+    /// internally in set_cooked_progress(). This is also the client-side sync
+    /// version, and it should be passed to
+    /// sync::Session::nonsync_transact_notify() if a synchronization session is
+    /// in progress for the same file while set_cooked_progress() is
+    /// called. Doing so, ensures that the server will be notified about the
+    /// released server versions as soon as possible.
+    ///
+    /// \throw InconsistentUseOfCookedHistory If this file does not have a
+    /// cooked history and one can no longer be added because changesets of
+    /// remote origin has already been integrated.
+    virtual version_type set_cooked_progress(CookedProgress) = 0;
+
+    /// \brief Get the number of cooked changesets so far produced for this
+    /// Realm.
+    ///
+    /// This is the same thing as is returned via \a num_changesets by
+    /// get_cooked_status().
+    std::int_fast64_t get_num_cooked_changesets() const noexcept;
+
+    /// \brief Returns the persisted progress that was last stored by
+    /// set_cooked_progress().
+    ///
+    /// This is the same thing as is returned via \a progress by
+    /// get_cooked_status() when invoked with a server version of zero.
+    CookedProgress get_cooked_progress() const noexcept;
 
-    /// Get the number of cooked changesets so far produced for this Realm. This
-    /// is the number of cooked changesets that are currently in the Realm file
-    /// plus the number of cooked changesets that have been trimmed off so far.
-    virtual std::int_fast64_t get_num_cooked_changesets() const = 0;
+    /// Same as get_cooked_changeset(std::int_fast64_t,
+    /// util::AppendBuffer<char>&, version_type&) but does not retreived the
+    /// server version.
+    void get_cooked_changeset(std::int_fast64_t index, util::AppendBuffer<char>&) const;
 
-    /// Fetch the cooked changeset at the specified index.
+    /// Return an upload cursor as it would be when the uploading process
+    /// reaches the snapshot to which the current transaction is bound.
     ///
-    /// Cooked changesets are made available in the order they are produced by
-    /// the changeset cooker (ChangesetCooker).
+    /// **CAUTION:** Must be called only while a transaction (read or write) is
+    /// in progress via the SharedGroup object associated with this history
+    /// object.
+    virtual UploadCursor get_upload_anchor_of_current_transact() const = 0;
+
+    /// Return the synchronization changeset of the current transaction as it
+    /// would be if that transaction was committed at this time.
     ///
-    /// Behaviour is undefined if the specified index is less than the index
-    /// (CookedProgress::changeset_index) returned by get_cooked_progress(), or
-    /// if it is greater than, or equal to the toal number of cooked changesets
-    /// (as returned by get_num_cooked_changesets()).
+    /// The returned memory reference may be invalidated by subsequent
+    /// operations on the Realm state.
     ///
-    /// The callee must append the bytes of the located cooked changeset to the
-    /// specified buffer, which does not have to be empty initially.
-    virtual void get_cooked_changeset(std::int_fast64_t index,
-                                      util::AppendBuffer<char>&) const = 0;
+    /// **CAUTION:** Must be called only while a write transaction is in
+    /// progress via the SharedGroup object associated with this history object.
+    virtual util::StringView get_sync_changeset_of_current_transact() const noexcept = 0;
 
 protected:
     ClientHistory(const std::string& realm_path);
@@ -385,16 +502,111 @@ std::unique_ptr<ClientHistory> make_client_history(const std::string& realm_path
 
 // Implementation
 
-inline ClientHistoryBase::ClientHistoryBase(const std::string& realm_path):
+inline timestamp_type generate_changeset_timestamp() noexcept
+{
+    namespace chrono = std::chrono;
+    // Unfortunately, C++11 does not specify what the epoch is for
+    // `chrono::system_clock` (or for any other clock). It is believed, however,
+    // that there is a de-facto standard, that the Epoch for
+    // `chrono::system_clock` is the Unix epoch, i.e., 1970-01-01T00:00:00Z. See
+    // http://stackoverflow.com/a/29800557/1698548. Additionally, it is assumed
+    // that leap seconds are not included in the value returned by
+    // time_since_epoch(), i.e., that it conforms to POSIX time. This is known
+    // to be true on Linux.
+    //
+    // FIXME: Investigate under which conditions OS X agrees with POSIX about
+    // not including leap seconds in the value returned by time_since_epoch().
+    //
+    // FIXME: Investigate whether Microsoft Windows agrees with POSIX about
+    // about not including leap seconds in the value returned by
+    // time_since_epoch().
+    auto time_since_epoch = chrono::system_clock::now().time_since_epoch();
+    std::uint_fast64_t millis_since_epoch =
+        chrono::duration_cast<chrono::milliseconds>(time_since_epoch).count();
+    // `offset_in_millis` is the number of milliseconds between
+    // 1970-01-01T00:00:00Z and 2015-01-01T00:00:00Z not counting leap seconds.
+    std::uint_fast64_t offset_in_millis = 1420070400000ULL;
+    return timestamp_type(millis_since_epoch - offset_in_millis);
+}
+
+inline void map_changeset_timestamp(timestamp_type timestamp, std::time_t& seconds_since_epoch,
+                                    long& nanoseconds) noexcept
+{
+    std::uint_fast64_t offset_in_millis = 1420070400000ULL;
+    std::uint_fast64_t millis_since_epoch = std::uint_fast64_t(offset_in_millis + timestamp);
+    seconds_since_epoch = std::time_t(millis_since_epoch / 1000);
+    nanoseconds = long(millis_since_epoch % 1000 * 1000000L);
+}
+
+class InconsistentUseOfCookedHistory : public std::exception {
+public:
+    InconsistentUseOfCookedHistory(const char* message) noexcept :
+        m_message{message}
+    {
+    }
+    const char* what() const noexcept override final
+    {
+        return m_message;
+    }
+private:
+    const char* m_message;
+};
+
+class BadCookedServerVersion : public std::exception {
+public:
+    BadCookedServerVersion(const char* message) noexcept :
+        m_message{message}
+    {
+    }
+    const char* what() const noexcept override final
+    {
+        return m_message;
+    }
+private:
+    const char* m_message;
+};
+
+inline ClientHistoryBase::ClientHistoryBase(const std::string& realm_path) :
     InstructionReplication{realm_path} // Throws
 {
 }
 
-inline ClientHistory::ClientHistory(const std::string& realm_path):
+inline ClientHistory::ClientHistory(const std::string& realm_path) :
     ClientHistoryBase{realm_path} // Throws
 {
 }
 
+inline std::int_fast64_t ClientHistory::get_num_cooked_changesets() const noexcept
+{
+    version_type server_version = 0; // Skip nothing
+    std::int_fast64_t num_changesets = 0;
+    ClientHistory::CookedProgress progress;
+    std::int_fast64_t num_skipped_changesets = 0;
+    get_cooked_status(server_version, num_changesets, progress, num_skipped_changesets);
+    REALM_ASSERT(progress.changeset_index <= num_changesets);
+    REALM_ASSERT(num_skipped_changesets == 0);
+    return num_changesets;
+}
+
+inline auto ClientHistory::get_cooked_progress() const noexcept -> CookedProgress
+{
+    version_type server_version = 0; // Skip nothing
+    std::int_fast64_t num_changesets = 0;
+    ClientHistory::CookedProgress progress;
+    std::int_fast64_t num_skipped_changesets = 0;
+    get_cooked_status(server_version, num_changesets, progress, num_skipped_changesets);
+    REALM_ASSERT(progress.changeset_index <= num_changesets);
+    REALM_ASSERT(num_skipped_changesets == 0);
+    return progress;
+}
+
+inline void ClientHistory::get_cooked_changeset(std::int_fast64_t index,
+                                                util::AppendBuffer<char>& buffer) const
+{
+    version_type server_version; // Dummy
+    get_cooked_changeset(index, buffer, server_version); // Throws
+}
+
 } // namespace sync
 } // namespace realm
 
diff --git a/Pods/Realm/include/core/realm/sync/instruction_applier.hpp b/Pods/Realm/include/core/realm/sync/instruction_applier.hpp
index 5b1b36f..92bb573 100644
--- a/Pods/Realm/include/core/realm/sync/instruction_applier.hpp
+++ b/Pods/Realm/include/core/realm/sync/instruction_applier.hpp
@@ -24,22 +24,23 @@
 #include <realm/sync/object.hpp>
 #include <realm/util/logger.hpp>
 
+
 namespace realm {
 namespace sync {
 
 struct Changeset;
 
 struct InstructionApplier {
-    explicit InstructionApplier(Group& group, TableInfoCache& table_info_cache) noexcept;
+    explicit InstructionApplier(Group&, TableInfoCache&) noexcept;
 
     /// Throws BadChangesetError if application fails due to a problem with the
     /// changeset.
     ///
     /// FIXME: Consider using std::error_code instead of throwing
     /// BadChangesetError.
-    void apply(const Changeset& log, util::Logger* logger);
+    void apply(const Changeset&, util::Logger*);
 
-    void begin_apply(const Changeset& log, util::Logger* logger) noexcept;
+    void begin_apply(const Changeset&, util::Logger*) noexcept;
     void end_apply() noexcept;
 
 protected:
@@ -50,16 +51,19 @@ struct InstructionApplier {
 #undef REALM_DECLARE_INSTRUCTION_HANDLER
     friend struct Instruction; // to allow visitor
 
-    template<class A> static void apply(A& applier, const Changeset& log, util::Logger* logger);
+    template<class A> static void apply(A& applier, const Changeset&, util::Logger*);
+
+    // Allows for in-place modification of changeset while applying it
+    template<class A> static void apply(A& applier, Changeset&, util::Logger*);
+
+    TableRef table_for_class_name(StringData) const; // Throws
+    REALM_NORETURN void bad_transaction_log(const char*) const;
 
     Group& m_group;
     TableInfoCache& m_table_info_cache;
-private:
-    const Changeset* m_log = nullptr;
-    util::Logger* m_logger = nullptr;
+    LinkViewRef m_selected_link_list;
     TableRef m_selected_table;
     TableRef m_selected_array;
-    LinkViewRef m_selected_link_list;
     TableRef m_link_target_table;
 
     template <class... Args>
@@ -70,9 +74,9 @@ struct InstructionApplier {
         }
     }
 
-    void bad_transaction_log(const char*) const; // Throws
-
-    TableRef table_for_class_name(StringData) const; // Throws
+private:
+    const Changeset* m_log = nullptr;
+    util::Logger* m_logger = nullptr;
 };
 
 
@@ -103,10 +107,25 @@ inline void InstructionApplier::end_apply() noexcept
 }
 
 template<class A>
-inline void InstructionApplier::apply(A& applier, const Changeset& log, util::Logger* logger)
+inline void InstructionApplier::apply(A& applier, const Changeset& changeset, util::Logger* logger)
+{
+    applier.begin_apply(changeset, logger);
+    for (auto instr : changeset) {
+        if (!instr)
+            continue;
+        instr->visit(applier); // Throws
+#if REALM_DEBUG
+        applier.m_table_info_cache.verify();
+#endif
+    }
+    applier.end_apply();
+}
+
+template<class A>
+inline void InstructionApplier::apply(A& applier, Changeset& changeset, util::Logger* logger)
 {
-    applier.begin_apply(log, logger);
-    for (auto instr: log) {
+    applier.begin_apply(changeset, logger);
+    for (auto instr : changeset) {
         if (!instr)
             continue;
         instr->visit(applier); // Throws
diff --git a/Pods/Realm/include/core/realm/sync/instruction_replication.hpp b/Pods/Realm/include/core/realm/sync/instruction_replication.hpp
index 243bf21..b66e332 100644
--- a/Pods/Realm/include/core/realm/sync/instruction_replication.hpp
+++ b/Pods/Realm/include/core/realm/sync/instruction_replication.hpp
@@ -30,6 +30,12 @@ namespace sync {
 
 class InstructionReplication: public TrivialReplication, public ObjectIDProvider {
 public:
+    enum class TableBehavior {
+        Class,
+        Array,
+        Ignore
+    };
+
     explicit InstructionReplication(const std::string& realm_path);
     void set_short_circuit(bool) noexcept;
     bool is_short_circuited() const noexcept;
@@ -40,6 +46,7 @@ class InstructionReplication: public TrivialReplication, public ObjectIDProvider
     virtual void reset();
 
     ChangesetEncoder& get_instruction_encoder() noexcept;
+    const ChangesetEncoder& get_instruction_encoder() const noexcept;
 
     //@{
     /// Generate instructions for Object Store tables. These must be called
@@ -117,9 +124,15 @@ class InstructionReplication: public TrivialReplication, public ObjectIDProvider
     void nullify_link(const Table*, size_t col_ndx, size_t ndx) override;
     void link_list_nullify(const LinkView&, size_t ndx) override;
 
+    template <class T>
+    void emit(T instruction);
+
+    TableBehavior select_table(const Table*);
+    const Table* selected_table() const noexcept;
+
 protected:
     // Replication interface:
-    void do_initiate_transact(version_type current_version, bool history_updated) override;
+    void do_initiate_transact(TransactionType, version_type current_version) override;
 private:
     bool m_short_circuit = false;
 
@@ -127,11 +140,6 @@ class InstructionReplication: public TrivialReplication, public ObjectIDProvider
     SharedGroup* m_sg = nullptr;
     std::unique_ptr<TableInfoCache> m_cache;
 
-    enum class TableBehavior {
-        Class,
-        Array,
-        Ignore
-    };
 
     // FIXME: The base class already caches this.
     ConstTableRef m_selected_table;
@@ -144,9 +152,9 @@ class InstructionReplication: public TrivialReplication, public ObjectIDProvider
     std::string m_table_being_erased;
     util::Optional<ObjectID> m_object_being_created;
 
-    void unsupported_instruction(); // Throws TransformError
-    TableBehavior select_table(const Table*);
+    REALM_NORETURN void unsupported_instruction(); // Throws TransformError
     TableBehavior select_table(const Descriptor&);
+    TableBehavior select_table_inner(const Table* table);
     bool select_link_list(const LinkView&); // returns true if table behavior != ignored
 
     TableBehavior get_table_behavior(const Table*) const;
@@ -159,8 +167,6 @@ class InstructionReplication: public TrivialReplication, public ObjectIDProvider
                 _impl::Instruction variant);
     template <class T>
     auto as_payload(T value);
-    template <class T>
-    void emit(T instruction);
 };
 
 inline void InstructionReplication::set_short_circuit(bool b) noexcept
@@ -178,6 +184,31 @@ inline ChangesetEncoder& InstructionReplication::get_instruction_encoder() noexc
     return m_encoder;
 }
 
+inline const ChangesetEncoder& InstructionReplication::get_instruction_encoder() const noexcept
+{
+    return m_encoder;
+}
+
+template <class T>
+inline void InstructionReplication::emit(T instruction)
+{
+    REALM_ASSERT(!m_short_circuit);
+    m_encoder(instruction);
+}
+
+inline auto InstructionReplication::select_table(const Table* table) -> TableBehavior
+{
+    if (m_selected_table == table) {
+        return m_selected_table_behavior;
+    }
+    return select_table_inner(table);
+}
+
+inline const Table* InstructionReplication::selected_table() const noexcept
+{
+    return m_selected_table.get();
+}
+
 // Temporarily short-circuit replication
 class TempShortCircuitReplication {
 public:
@@ -191,6 +222,11 @@ class TempShortCircuitReplication {
     {
         m_bridge.set_short_circuit(m_was_short_circuited);
     }
+
+    bool was_short_circuited() const noexcept
+    {
+        return m_was_short_circuited;
+    }
 private:
     InstructionReplication& m_bridge;
     bool m_was_short_circuited;
diff --git a/Pods/Realm/include/core/realm/sync/instructions.hpp b/Pods/Realm/include/core/realm/sync/instructions.hpp
index 93e7aa2..4c8051a 100644
--- a/Pods/Realm/include/core/realm/sync/instructions.hpp
+++ b/Pods/Realm/include/core/realm/sync/instructions.hpp
@@ -95,32 +95,28 @@ struct Instruction {
     template <class T> struct GetInstructionType;
 
     Instruction() {}
-    template <class T>
-    Instruction(T instr);
+    template<class T> Instruction(T instr);
 
     static const size_t max_instruction_size = 64;
-    std::aligned_storage_t<max_instruction_size, 16> m_storage;
+    std::aligned_storage_t<max_instruction_size> m_storage;
     Type type;
 
-    template <class F>
-    auto visit(F&& lambda);
-    template <class F>
-    auto visit(F&& lambda) const;
+    template<class F> auto visit(F&& lambda);
+    template<class F> auto visit(F&& lambda) const;
 
-    template <class T>
-    T& get_as()
+    template<class T> T& get_as()
     {
         REALM_ASSERT(type == GetInstructionType<T>::value);
         return *reinterpret_cast<T*>(&m_storage);
     }
 
-    template <class T>
-    const T& get_as() const
+    template<class T> const T& get_as() const
     {
         return const_cast<Instruction*>(this)->template get_as<T>();
     }
 
     bool operator==(const Instruction& other) const noexcept;
+
     bool operator!=(const Instruction& other) const noexcept
     {
         return !(*this == other);
@@ -142,11 +138,14 @@ struct StringBufferRange {
 
 struct InternString {
     static const InternString npos;
-    explicit constexpr InternString(uint32_t v = uint32_t(-1)): value(v) {}
+    explicit constexpr InternString(uint32_t v = uint32_t(-1)) noexcept : value(v) {}
 
     uint32_t value;
 
     bool operator==(const InternString& other) const noexcept { return value == other.value; }
+    bool operator<(const InternString& other) const noexcept { return value < other.value; }
+
+    explicit operator bool() const noexcept { return (value != npos.value); }
 };
 
 struct Instruction::Payload {
@@ -176,12 +175,15 @@ struct Instruction::Payload {
     explicit Payload(int64_t value)   noexcept: type(type_Int) { data.integer = value; }
     explicit Payload(float value)     noexcept: type(type_Float) { data.fnum = value; }
     explicit Payload(double value)    noexcept: type(type_Double) { data.dnum = value; }
-    explicit Payload(Timestamp value) noexcept: type(type_Timestamp) { data.timestamp = value; }
     explicit Payload(Link value)      noexcept: type(type_Link) { data.link = value; }
     explicit Payload(StringBufferRange value) noexcept: type(type_String) { data.str = value; }
     explicit Payload(realm::util::None, bool implicit_null = false) noexcept {
         type = (implicit_null ? -2 : -1);
     }
+    explicit Payload(Timestamp value) noexcept: type(value.is_null() ? -1 : type_Timestamp)
+    {
+        data.timestamp = value;
+    }
 
     Payload(const Payload&) noexcept = default;
     Payload& operator=(const Payload&) noexcept = default;
@@ -346,29 +348,14 @@ struct InstructionHandler {
 
 /// Implementation:
 
-#if !defined(__GNUC__) || defined(__clang__) || __GNUC__ > 4 // GCC 4.x does not support std::is_trivially_copyable
-#define REALM_CHECK_TRIVIALLY_COPYABLE(X) static_assert(std::is_trivially_copyable<Instruction::X>::value, #X" Instructions must be trivially copyable.");
-    REALM_FOR_EACH_INSTRUCTION_TYPE(REALM_CHECK_TRIVIALLY_COPYABLE)
-#undef REALM_CHECK_TRIVIALLY_COPYABLE
-#endif // __GNUC__
-
-#ifdef _WIN32 // FIXME: Fails in VS. 
-#define REALM_CHECK_INSTRUCTION_SIZE(X)
-#else
-#define REALM_CHECK_INSTRUCTION_SIZE(X) static_assert(sizeof(Instruction::X) <= Instruction::max_instruction_size, #X" Instruction too big.");
-    REALM_FOR_EACH_INSTRUCTION_TYPE(REALM_CHECK_INSTRUCTION_SIZE)
-#undef REALM_CHECK_INSTRUCTION_SIZE
-#endif
-
 #define REALM_DEFINE_INSTRUCTION_GET_TYPE(X) \
     template <> struct Instruction::GetType<Instruction::Type::X> { using Type = Instruction::X; }; \
     template <> struct Instruction::GetInstructionType<Instruction::X> { static const Instruction::Type value = Instruction::Type::X; };
     REALM_FOR_EACH_INSTRUCTION_TYPE(REALM_DEFINE_INSTRUCTION_GET_TYPE)
 #undef REALM_DEFINE_INSTRUCTION_GET_TYPE
 
-
 template <class T>
-Instruction::Instruction(T instr): type(GetInstructionType<T>::value)
+Instruction::Instruction(T instr) : type(GetInstructionType<T>::value)
 {
     new(&m_storage) T(std::move(instr));
 }
@@ -378,7 +365,21 @@ inline auto Instruction::visit(F&& lambda)
 {
     switch (type) {
 #define REALM_VISIT_INSTRUCTION(X) \
-        case Type::X: return lambda(get_as<Instruction::X>());
+        case Type::X: \
+            return lambda(get_as<Instruction::X>());
+        REALM_FOR_EACH_INSTRUCTION_TYPE(REALM_VISIT_INSTRUCTION)
+#undef REALM_VISIT_INSTRUCTION
+    }
+    REALM_UNREACHABLE();
+}
+
+template <class F>
+inline auto Instruction::visit(F&& lambda) const
+{
+    switch (type) {
+#define REALM_VISIT_INSTRUCTION(X) \
+        case Type::X: \
+            return lambda(get_as<Instruction::X>());
         REALM_FOR_EACH_INSTRUCTION_TYPE(REALM_VISIT_INSTRUCTION)
 #undef REALM_VISIT_INSTRUCTION
     }
@@ -402,10 +403,14 @@ inline bool Instruction::operator==(const Instruction& other) const noexcept
     return std::memcmp(&m_storage, &other.m_storage, valid_size) == 0;
 }
 
-template <class F>
-auto Instruction::visit(F&& lambda) const
+inline bool Instruction::Payload::is_null() const
+{
+    return type < 0;
+}
+
+inline bool Instruction::Payload::is_implicit_null() const
 {
-    return const_cast<Instruction*>(this)->visit(std::forward<F>(lambda));
+    return type == -2;
 }
 
 std::ostream& operator<<(std::ostream&, Instruction::Type);
diff --git a/Pods/Realm/include/core/realm/sync/object.hpp b/Pods/Realm/include/core/realm/sync/object.hpp
index 2774648..8529fa0 100644
--- a/Pods/Realm/include/core/realm/sync/object.hpp
+++ b/Pods/Realm/include/core/realm/sync/object.hpp
@@ -41,8 +41,8 @@ namespace sync {
 
 class SyncHistory;
 
-static const char object_id_column_name[] = "!OID";
-static const char array_value_column_name[] = "!ARRAY_VALUE"; // FIXME call Jorgen
+extern const char object_id_column_name[]; // "!OID"
+extern const char array_value_column_name[]; // "!ARRAY_VALUE"
 
 struct TableInfoCache;
 
@@ -113,10 +113,10 @@ void erase_table(Group& g, TableInfoCache& table_info_cache, TableRef);
 /// Create an array column with the specified element type.
 ///
 /// The result will be a column of type type_Table with one subcolumn named
-/// "!ARRAY_VALUE" of the specified element type.
+/// "!ARRAY_VALUE" of the specified element type and nullability.
 ///
 /// Return the column index of the inserted array column.
-size_t add_array_column(Table&, DataType element_type, StringData column_name);
+size_t add_array_column(Table&, DataType element_type, StringData column_name, bool is_nullable = false);
 
 
 //@{
diff --git a/Pods/Realm/include/core/realm/sync/object_id.hpp b/Pods/Realm/include/core/realm/sync/object_id.hpp
index 181542b..e3e96e0 100644
--- a/Pods/Realm/include/core/realm/sync/object_id.hpp
+++ b/Pods/Realm/include/core/realm/sync/object_id.hpp
@@ -46,12 +46,13 @@ class Group;
 
 namespace sync {
 
-/// ObjectIDs are globally unique, and up to 128 bits wide. They are represented
-/// as two 64-bit integers, each of which may frequently be small, for best
-/// on-wire compressibility.
+/// ObjectIDs are globally unique for a given class (table), and up to 128 bits
+/// wide. They are represented as two 64-bit integers, each of which may
+/// frequently be small, for best on-wire compressibility.
 struct ObjectID {
     constexpr ObjectID(uint64_t hi, uint64_t lo);
     static ObjectID from_string(StringData);
+    static bool from_string(StringData, ObjectID&) noexcept;
 
     // FIXME: Remove "empty" ObjectIDs, wrap in Optional instead.
     constexpr ObjectID(realm::util::None = realm::util::none);
@@ -67,6 +68,8 @@ struct ObjectID {
     constexpr bool operator==(const ObjectID& other) const;
     constexpr bool operator!=(const ObjectID& other) const;
 
+    explicit constexpr operator bool() const noexcept;
+
 private:
     uint64_t m_lo;
     uint64_t m_hi;
@@ -139,6 +142,7 @@ class ObjectIDSet {
     void insert(StringData table, ObjectID object_id);
     void erase(StringData table, ObjectID object_id);
     bool contains(StringData table, ObjectID object_id) const noexcept;
+    bool empty() const noexcept;
 
     // A map from table name to a set of object ids.
     util::metered::map<std::string, util::metered::set<ObjectID>> m_objects;
@@ -153,6 +157,7 @@ class FieldSet {
     void erase(StringData table, StringData column, ObjectID object_id);
     bool contains(StringData table, ObjectID object_id) const noexcept;
     bool contains(StringData table, StringData column, ObjectID object_id) const noexcept;
+    bool empty() const noexcept;
 
     // A map from table name to a map from column name to a set of
     // object ids.
@@ -171,14 +176,16 @@ struct GlobalID {
     bool operator<(const GlobalID& other) const;
 };
 
-/// Implementation:
 
 
-constexpr ObjectID::ObjectID(uint64_t hi, uint64_t lo): m_lo(lo), m_hi(hi)
+
+/// Implementation
+
+constexpr ObjectID::ObjectID(uint64_t hi, uint64_t lo) : m_lo(lo), m_hi(hi)
 {
 }
 
-constexpr ObjectID::ObjectID(realm::util::None): m_lo(-1), m_hi(-1)
+constexpr ObjectID::ObjectID(realm::util::None) : m_lo(-1), m_hi(-1)
 {
 }
 
@@ -197,6 +204,11 @@ constexpr bool ObjectID::operator!=(const ObjectID& other) const
     return !(*this == other);
 }
 
+constexpr ObjectID::operator bool() const noexcept
+{
+    return (*this != ObjectID{});
+}
+
 inline bool GlobalID::operator==(const GlobalID& other) const
 {
     return object_id == other.object_id && table_name == other.table_name;
@@ -216,6 +228,7 @@ inline bool GlobalID::operator<(const GlobalID& other) const
 
 
 std::ostream& operator<<(std::ostream&, const realm::sync::ObjectID&);
+std::istream& operator>>(std::istream&, realm::sync::ObjectID&);
 
 inline ObjectIDProvider::LocalObjectID
 ObjectIDProvider::get_optimistic_local_id_hashed(ObjectID global_id)
@@ -270,6 +283,16 @@ ObjectIDProvider::local_to_global_object_id_squeezed(LocalObjectID squeezed)
     return ObjectID{hi, lo};
 }
 
+inline bool ObjectIDSet::empty() const noexcept
+{
+    return m_objects.empty();
+}
+
+inline bool FieldSet::empty() const noexcept
+{
+    return m_fields.empty();
+}
+
 } // namespace sync
 } // namespace realm
 
diff --git a/Pods/Realm/include/core/realm/sync/permissions.hpp b/Pods/Realm/include/core/realm/sync/permissions.hpp
index e6fd2d9..073f2d6 100644
--- a/Pods/Realm/include/core/realm/sync/permissions.hpp
+++ b/Pods/Realm/include/core/realm/sync/permissions.hpp
@@ -84,10 +84,9 @@ void set_up_basic_permissions(Group& group, TableInfoCache& table_info_cache, bo
 // Convenience function that creates a new TableInfoCache.
 void set_up_basic_permissions(Group& group, bool permissive = true);
 
-void set_up_basic_permissions_for_class(Group&, StringData class_name, bool permissive = true);
-
 /// Set up some basic permissions for the class. The default is to set up some
 /// very permissive default, where "everyone" can do everything in the class.
+void set_up_basic_permissions_for_class(Group&, StringData class_name, bool permissive = true);
 // void set_up_basic_default_permissions_for_class(Group&, TableRef klass, bool permissive = true);
 
 /// Return the index of the ACL in the class, if one exists. If no ACL column is
@@ -102,6 +101,32 @@ bool permissions_schema_exist(const Group&);
 bool user_exist(const Group&, StringData user_id);
 //@}
 
+
+/// Perform a query as user \a user_id, returning only the results that the
+/// user has access to read. If the user is an admin, there is no need to call
+/// this function, since admins can always read everything.
+///
+/// If the target table of the query does not have object-level permissions,
+/// the query results will be returned without any additional filtering.
+///
+/// If the target table of the query has object-level permissions, but the
+/// permissions schema of this Realm is invalid, an exception of type
+/// `InvalidPermissionsSchema` is thrown.
+///
+/// LIMIT and DISTINCT will be applied *after* permission filters.
+///
+/// The resulting TableView can be used like any other query result.
+///
+/// Note: Class-level and Realm-level permissions are not taken into account in
+/// the resulting TableView, since there is no way to represent this in the
+/// query engine.
+ConstTableView query_with_permissions(Query query, StringData user_id,
+                                      const DescriptorOrdering* ordering = nullptr);
+
+struct InvalidPermissionsSchema : util::runtime_error {
+    using util::runtime_error::runtime_error;
+};
+
 //@{
 /// Convenience function to modify permission data.
 ///
@@ -372,6 +397,8 @@ struct PermissionCorrections {
 
     // Tables that were illegally removed by the client.
     TableSet recreate_tables;
+
+    bool empty() const noexcept;
 };
 
 // Function for printing out a permission correction object. Useful for debugging purposes.
@@ -401,6 +428,17 @@ struct InstructionApplierWithPermissionCheck {
     std::unique_ptr<Impl> m_impl;
 };
 
+
+// Implementation:
+
+inline bool PermissionCorrections::empty() const noexcept
+{
+    return recreate_objects.empty() && erase_objects.empty()
+        && reset_fields.empty() && erase_columns.empty()
+        && recreate_columns.empty() && erase_tables.empty()
+        && recreate_tables.empty();
+}
+
 } // namespace sync
 } // namespace realm
 
diff --git a/Pods/Realm/include/core/realm/sync/protocol.hpp b/Pods/Realm/include/core/realm/sync/protocol.hpp
index 004acd0..1178218 100644
--- a/Pods/Realm/include/core/realm/sync/protocol.hpp
+++ b/Pods/Realm/include/core/realm/sync/protocol.hpp
@@ -121,10 +121,74 @@ namespace sync {
 //
 //  25 Include "last server version" in the UPLOAD message for history trimming
 //     on the server.
-
+//
+//  26 Four new protocol error codes, 217, 218, 219, and 220.
+//
+//     The downloadable_bytes field in the DOWNLOAD message denotes the byte
+//     size of the changesets following those in the DOWNLOAD
+//     message. Previously, downloadable_bytes denoted the total byte size of
+//     the entire history.
+//
+//     Introduction of protocol version flexibility on client side (strictly
+//     speaking, this is a change that transcends the sync protocol).
+//
+//  27 STATE_REQUEST, STATE, CLIENT_VERSION_REQUEST and CLIENT_VERSION messages
+//     introduced. These messages are used for client reset and async open.
+//
+//  28 Introduction of TRANSACT message (serialized transactions). New session
+//     level error code 221 "Serialized transaction before upload completion".
+//
+//     Also added new parameters `<min file format version>`, `<max file format
+//     version>`, `<min history schema version>`, and `<max history schema
+//     version>` to STATE_REQUEST message.
+//
+//  29 Addition of `<progress client version>` and `<progress server version>`
+//     to the UPLOAD message. Together, these constitute an upload cursor that
+//     marks the reached position in the client-side history of the uploading
+//     process.
+//
+//     Removal of `<last server version>`, and addition of `<locked server
+//     version>`. `<last server version>` was replaced in part by `<progress
+//     server version>` as described above, and in part by the new `<locked
+//     server version>`. The purpose of `<locked server version>` is to allow
+//     the client to lock parts of the server-side history that precede
+//     `<progress server version>`. It is intended to be used in the future in
+//     conjunction with the cooked history.
+//
+//  30 New error code, 222 "Client file has expired", was added. New parameter
+//     `<is subserver>` added to BIND message.
+//
 constexpr int get_current_protocol_version() noexcept
 {
-    return 25;
+    return 30;
+}
+
+
+/// Supported protocol envelopes:
+///
+///                                                             Alternative (*)
+///      Name     Envelope          URL scheme   Default port   default port
+///     ------------------------------------------------------------------------
+///      realm    WebSocket         realm:       7800           80
+///      realms   WebSocket + SSL   realms:      7801           443
+///      ws       WebSocket         ws:          80
+///      wss      WebSocket + SSL   wss:         443
+///
+///       *) When Client::Config::enable_default_port_hack is true
+///
+enum class ProtocolEnvelope { realm, realms, ws, wss };
+
+inline bool is_ssl(ProtocolEnvelope protocol) noexcept
+{
+    switch (protocol) {
+        case ProtocolEnvelope::realm:
+        case ProtocolEnvelope::ws:
+            break;
+        case ProtocolEnvelope::realms:
+        case ProtocolEnvelope::wss:
+            return true;
+    }
+    return false;
 }
 
 
@@ -175,6 +239,19 @@ struct DownloadCursor {
     version_type last_integrated_client_version;
 };
 
+/// Checks that `dc.last_integrated_client_version` is zero if
+/// `dc.server_version` is zero.
+bool is_consistent(DownloadCursor dc) noexcept;
+
+/// Checks that `a.last_integrated_client_version` and
+/// `b.last_integrated_client_version` are equal, if `a.server_version` and
+/// `b.server_version` are equal. Otherwise checks that
+/// `a.last_integrated_client_version` is less than, or equal to
+/// `b.last_integrated_client_version`, if `a.server_version` is less than
+/// `b.server_version`. Otherwise checks that `a.last_integrated_client_version`
+/// is greater than, or equal to `b.last_integrated_client_version`.
+bool are_mutually_consistent(DownloadCursor a, DownloadCursor b) noexcept;
+
 
 /// \brief The server's reference to a position in the client-side history.
 ///
@@ -194,14 +271,49 @@ struct UploadCursor {
     version_type last_integrated_server_version;
 };
 
+/// Checks that `uc.last_integrated_server_version` is zero if
+/// `uc.client_version` is zero.
+bool is_consistent(UploadCursor uc) noexcept;
+
+/// Checks that `a.last_integrated_server_version` and
+/// `b.last_integrated_server_version` are equal, if `a.client_version` and
+/// `b.client_version` are equal. Otherwise checks that
+/// `a.last_integrated_server_version` is less than, or equal to
+/// `b.last_integrated_server_version`, if `a.client_version` is less than
+/// `b.client_version`. Otherwise checks that `a.last_integrated_server_version`
+/// is greater than, or equal to `b.last_integrated_server_version`.
+bool are_mutually_consistent(UploadCursor a, UploadCursor b) noexcept;
+
 
 /// A client's record of the current point of progress of the synchronization
 /// process. The client must store this persistently in the local Realm file.
 struct SyncProgress {
-    SaltedVersion     latest_server_version{0, 0};
-    DownloadCursor    download{0, 0};
-    UploadCursor      upload{0, 0};
-    std::int_fast64_t downloadable_bytes = 0;
+    /// The last server version that the client has heard about.
+    SaltedVersion latest_server_version = {0, 0};
+
+    /// The last server version integrated, or about to be integrated by the
+    /// client.
+    DownloadCursor download = {0, 0};
+
+    /// The last client version integrated by the server.
+    UploadCursor upload = {0, 0};
+};
+
+
+/// An indication of the final status of an attempt at performing a serialized
+/// transaction.
+enum class SerialTransactStatus {
+    /// The transaction was accepted and successful.
+    accepted = 1,
+
+    /// The transaction was rejected because the servers history contained
+    /// causally unrelated changes. I.e., the requesting client lost a race to
+    /// be served first. The client should try again.
+    rejected = 2,
+
+    /// The server did not support serialized transactions at all, or did not
+    /// support it on the targeted Realm in particular.
+    not_supported = 3,
 };
 
 
@@ -221,7 +333,7 @@ enum class ProtocolError {
     unknown_message              = 102, // Unknown type of input message
     bad_syntax                   = 103, // Bad syntax in input message head
     limits_exceeded              = 104, // Limits exceeded in input message
-    wrong_protocol_version       = 105, // Wrong protocol version (CLIENT)
+    wrong_protocol_version       = 105, // Wrong protocol version (CLIENT) (obsolete)
     bad_session_ident            = 106, // Bad session identifier in input message
     reuse_of_session_ident       = 107, // Overlapping reuse of session identifier (BIND)
     bound_in_other_session       = 108, // Client file bound in other session (IDENT)
@@ -238,24 +350,27 @@ enum class ProtocolError {
     bad_authentication           = 203, // Bad user authentication (BIND, REFRESH)
     illegal_realm_path           = 204, // Illegal Realm path (BIND)
     no_such_realm                = 205, // No such Realm (BIND)
-    permission_denied            = 206, // Permission denied (BIND, REFRESH)
+    permission_denied            = 206, // Permission denied (STATE_REQUEST, BIND, REFRESH)
     bad_server_file_ident        = 207, // Bad server file identifier (IDENT) (obsolete!)
     bad_client_file_ident        = 208, // Bad client file identifier (IDENT)
-    bad_server_version           = 209, // Bad server version (IDENT, UPLOAD)
+    bad_server_version           = 209, // Bad server version (IDENT, UPLOAD, TRANSACT)
     bad_client_version           = 210, // Bad client version (IDENT, UPLOAD)
     diverging_histories          = 211, // Diverging histories (IDENT)
     bad_changeset                = 212, // Bad changeset (UPLOAD)
     superseded                   = 213, // Superseded by new session for same client-side file (deprecated)
     disabled_session             = 213, // Alias for `superseded` (deprecated)
-    partial_sync_disabled        = 214, // Partial sync disabled (BIND)
+    partial_sync_disabled        = 214, // Partial sync disabled (BIND, STATE_REQUEST)
     unsupported_session_feature  = 215, // Unsupported session-level feature
     bad_origin_file_ident        = 216, // Bad origin file identifier (UPLOAD)
+    bad_client_file              = 217, // Synchronization no longer possible for client-side file
+    server_file_deleted          = 218, // Server file was deleted while session was bound to it
+    client_file_blacklisted      = 219, // Client file has been blacklisted (IDENT)
+    user_blacklisted             = 220, // User has been blacklisted (BIND)
+    transact_before_upload       = 221, // Serialized transaction before upload completion
+    client_file_expired          = 222, // Client file has expired
 };
 
-inline constexpr bool is_session_level_error(ProtocolError error)
-{
-    return int(error) >= 200 && int(error) <= 299;
-}
+constexpr bool is_session_level_error(ProtocolError);
 
 /// Returns null if the specified protocol error code is not defined by
 /// ProtocolError.
@@ -279,6 +394,45 @@ template<> struct is_error_code_enum<realm::sync::ProtocolError> {
 namespace realm {
 namespace sync {
 
+
+
+
+
+// Implementation
+
+inline bool is_consistent(DownloadCursor dc) noexcept
+{
+    return (dc.server_version != 0 || dc.last_integrated_client_version == 0);
+}
+
+inline bool are_mutually_consistent(DownloadCursor a, DownloadCursor b) noexcept
+{
+    if (a.server_version < b.server_version)
+        return (a.last_integrated_client_version <= b.last_integrated_client_version);
+    if (a.server_version > b.server_version)
+        return (a.last_integrated_client_version >= b.last_integrated_client_version);
+    return (a.last_integrated_client_version == b.last_integrated_client_version);
+}
+
+inline bool is_consistent(UploadCursor uc) noexcept
+{
+    return (uc.client_version != 0 || uc.last_integrated_server_version == 0);
+}
+
+inline bool are_mutually_consistent(UploadCursor a, UploadCursor b) noexcept
+{
+    if (a.client_version < b.client_version)
+        return (a.last_integrated_server_version <= b.last_integrated_server_version);
+    if (a.client_version > b.client_version)
+        return (a.last_integrated_server_version >= b.last_integrated_server_version);
+    return (a.last_integrated_server_version == b.last_integrated_server_version);
+}
+
+constexpr bool is_session_level_error(ProtocolError error)
+{
+    return int(error) >= 200 && int(error) <= 299;
+}
+
 } // namespace sync
 } // namespace realm
 
diff --git a/Pods/Realm/include/core/realm/sync/transform.hpp b/Pods/Realm/include/core/realm/sync/transform.hpp
index 29e4f63..1f74fa6 100644
--- a/Pods/Realm/include/core/realm/sync/transform.hpp
+++ b/Pods/Realm/include/core/realm/sync/transform.hpp
@@ -245,7 +245,7 @@ class Transformer::RemoteChangeset {
 
     /// If the changeset was compacted during download, the size of the original
     /// changeset.
-    size_t original_changeset_size = 0;
+    std::size_t original_changeset_size = 0;
 
     RemoteChangeset() {}
     RemoteChangeset(version_type rv, version_type lv, ChunkedBinaryData d, timestamp_type ot,
diff --git a/Pods/Realm/include/core/realm/sync/version.hpp b/Pods/Realm/include/core/realm/sync/version.hpp
index b39a09e..36f98c8 100644
--- a/Pods/Realm/include/core/realm/sync/version.hpp
+++ b/Pods/Realm/include/core/realm/sync/version.hpp
@@ -22,9 +22,9 @@
 
 #include <realm/util/features.h>
 
-#define REALM_SYNC_VER_MAJOR 3
-#define REALM_SYNC_VER_MINOR 13
-#define REALM_SYNC_VER_PATCH 3
+#define REALM_SYNC_VER_MAJOR 4
+#define REALM_SYNC_VER_MINOR 9
+#define REALM_SYNC_VER_PATCH 0
 #define REALM_SYNC_PRODUCT_NAME "realm-sync"
 
 #define REALM_SYNC_VER_STRING REALM_QUOTE(REALM_SYNC_VER_MAJOR) "." \
diff --git a/Pods/Realm/include/core/realm/table_view.hpp b/Pods/Realm/include/core/realm/table_view.hpp
index bfc4376..3989da0 100644
--- a/Pods/Realm/include/core/realm/table_view.hpp
+++ b/Pods/Realm/include/core/realm/table_view.hpp
@@ -258,7 +258,7 @@ class TableViewBase : public RowIndexes {
     size_t find_by_source_ndx(size_t source_ndx) const noexcept;
 
     // Conversion
-    void to_json(std::ostream&) const;
+    void to_json(std::ostream&, size_t link_depth = 0, std::map<std::string, std::string>* renames = nullptr) const;
     void to_string(std::ostream&, size_t limit = 500) const;
     void row_to_string(size_t row_ndx, std::ostream&) const;
 
@@ -301,6 +301,8 @@ class TableViewBase : public RowIndexes {
     void distinct(size_t column);
     void distinct(DistinctDescriptor columns);
     void limit(LimitDescriptor limit);
+    void include(IncludeDescriptor include_paths);
+    IncludeDescriptor get_include_descriptors();
 
     // Replace the order of sort and distinct operations, bypassing manually
     // calling sort and distinct. This is a convenience method for bindings.
diff --git a/Pods/Realm/include/core/realm/timestamp.hpp b/Pods/Realm/include/core/realm/timestamp.hpp
index 1e847e4..2108245 100644
--- a/Pods/Realm/include/core/realm/timestamp.hpp
+++ b/Pods/Realm/include/core/realm/timestamp.hpp
@@ -21,6 +21,7 @@
 
 #include <cstdint>
 #include <ostream>
+#include <chrono>
 #include <realm/util/assert.hpp>
 #include <realm/null.hpp>
 
@@ -76,6 +77,14 @@ class Timestamp {
         : m_is_null(true)
     {
     }
+    template <typename C = std::chrono::system_clock, typename D = typename C::duration>
+    Timestamp(std::chrono::time_point<C, D> tp)
+        : m_is_null(false)
+    {
+        int64_t native_nano = std::chrono::duration_cast<std::chrono::nanoseconds>(tp.time_since_epoch()).count();
+        m_seconds = native_nano / nanoseconds_per_second;
+        m_nanoseconds = static_cast<int32_t>(native_nano % nanoseconds_per_second);
+    }
     Timestamp()
         : Timestamp(null{})
     {
@@ -98,6 +107,17 @@ class Timestamp {
         return m_nanoseconds;
     }
 
+    template <typename C = std::chrono::system_clock, typename D = typename C::duration>
+    std::chrono::time_point<C, D> get_time_point()
+    {
+        REALM_ASSERT(!m_is_null);
+
+        int64_t native_nano = m_seconds * nanoseconds_per_second + m_nanoseconds;
+        auto duration = std::chrono::duration_cast<D>(std::chrono::duration<int64_t, std::nano>{native_nano});
+
+        return std::chrono::time_point<C, D>(duration);
+    }
+
     // Note that only == and != operators work if one of the Timestamps are null! Else use realm::Greater,
     // realm::Less, etc, instead. This is in order to collect all treatment of null behaviour in a single place for all
     // types (query_conditions.hpp) to ensure that all types sort and compare null vs. non-null in the same manner,
diff --git a/Pods/Realm/include/core/realm/util/aes_cryptor.hpp b/Pods/Realm/include/core/realm/util/aes_cryptor.hpp
index 86adb96..23720b1 100644
--- a/Pods/Realm/include/core/realm/util/aes_cryptor.hpp
+++ b/Pods/Realm/include/core/realm/util/aes_cryptor.hpp
@@ -33,8 +33,8 @@
 #include <bcrypt.h>
 #pragma comment(lib, "bcrypt.lib")
 #else
-#include <openssl/aes.h>
 #include <openssl/sha.h>
+#include <openssl/evp.h>
 #endif
 
 namespace realm {
@@ -62,8 +62,8 @@ class AESCryptor {
         mode_Encrypt = 0,
         mode_Decrypt = 1
 #else
-        mode_Encrypt = AES_ENCRYPT,
-        mode_Decrypt = AES_DECRYPT
+        mode_Encrypt = 1,
+        mode_Decrypt = 0
 #endif
     };
 
@@ -73,8 +73,8 @@ class AESCryptor {
 #elif defined(_WIN32)
     BCRYPT_KEY_HANDLE m_aes_key_handle;
 #else
-    AES_KEY m_ectx;
-    AES_KEY m_dctx;
+    uint8_t m_aesKey[32];
+    EVP_CIPHER_CTX* m_ctx;
 #endif
 
     uint8_t m_hmacKey[32];
@@ -86,12 +86,24 @@ class AESCryptor {
     bool check_hmac(const void* data, size_t len, const uint8_t* hmac) const;
     void crypt(EncryptionMode mode, off_t pos, char* dst, const char* src, const char* stored_iv) noexcept;
     iv_table& get_iv_table(FileDesc fd, off_t data_pos) noexcept;
+    void handle_error();
+};
+
+struct ReaderInfo {
+    const void* reader_ID;
+    uint64_t version;
 };
 
 struct SharedFileInfo {
     FileDesc fd;
     AESCryptor cryptor;
     std::vector<EncryptedFileMapping*> mappings;
+    uint64_t last_scanned_version = 0;
+    uint64_t current_version = 0;
+    size_t num_decrypted_pages = 0;
+    size_t num_reclaimed_pages = 0;
+    size_t progress_index = 0;
+    std::vector<ReaderInfo> readers;
 
     SharedFileInfo(const uint8_t* key, FileDesc file_descriptor);
 };
diff --git a/Pods/Realm/include/core/realm/util/allocation_metrics.hpp b/Pods/Realm/include/core/realm/util/allocation_metrics.hpp
index acf8a38..10176e7 100644
--- a/Pods/Realm/include/core/realm/util/allocation_metrics.hpp
+++ b/Pods/Realm/include/core/realm/util/allocation_metrics.hpp
@@ -21,38 +21,80 @@
 #define REALM_UTIL_ALLOCATION_METRICS_HPP
 
 #include <atomic>
+#include <vector>
 
 #include <realm/util/allocator.hpp>
 
 namespace realm {
 namespace util {
 
-class AllocationMetric : public AllocatorBase {
-public:
-    /// Warning: Instances of AllocationMetric must be statically
-    /// allocated. When an instance has been initialized, it must not be
-    /// destroyed until the program terminates. This is to ensure that
-    /// iterating over existing components is thread-safe and lock-free.
-    explicit AllocationMetric(const char* name) noexcept;
+/// Designate a name to be used in heap allocation metrics.
+///
+/// An instance can be used with `AllocationMetricsContext::get_metric()` to
+/// obtain an instance of `MeteredAllocator` that counts
+/// allocations/deallocations towards this name, within that context.
+///
+/// Instances of `AllocationMetricName` should be statically allocated. When an
+/// instance has been initialized, it must not be destroyed until the program
+/// terminates. This is to ensure that iterating over existing names is
+/// thread-safe and lock-free.
+///
+/// Similarly, when an instance of `AllocationMetricsContext` has been
+/// allocated, no further instances of AllocationMetricName must be
+/// instantiated.
+struct AllocationMetricName {
+    explicit AllocationMetricName(const char* name) noexcept;
 
-    /// Return the name of this metric.
+    /// Get the string name.
     ///
     /// This method is thread-safe.
     const char* name() const noexcept;
 
-    /// Get the first component in the list of components. This method is
-    /// thread-safe.
-    static const AllocationMetric* get_top() noexcept;
-    static const AllocationMetric* find(const char* name) noexcept;
-    static const AllocationMetric* unknown() noexcept;
+    /// Get the index of this metric. The index corresponds to an allocator
+    /// inside the current instance of AllocatorMetricTenant.
+    ///
+    /// This method is thread-safe.
+    size_t index() const noexcept;
 
-    /// Get the next component in the list. This method is thread-safe.
-    const AllocationMetric* next() const noexcept;
+    /// Get the next name. The names are returned in no particular order.
+    ///
+    /// This method is thread-safe.
+    const AllocationMetricName* next() const noexcept;
 
-    /// Return the currently allocated number of bytes.
+    /// Get the first name in the internal list of names, for the purpose
+    /// of iterating over all names in the program.
     ///
     /// This method is thread-safe.
-    std::size_t get_allocated_bytes() const noexcept;
+    static const AllocationMetricName* get_top() noexcept;
+    static const AllocationMetricName* find(const char* name) noexcept;
+private:
+    const char* m_name;
+    size_t m_index; // Index into `AllocationMetricsContext::m_metrics`.
+
+    // This is used to iterate over all existing components. Instances of
+    // AllocationMetricName are expected to be statically allocated.
+    const AllocationMetricName* m_next = nullptr;
+};
+
+
+/// A heap memory allocator that keeps track of how much was
+/// allocated/deallocated throughout its lifetime.
+///
+/// Memory is allocated with `DefaultAllocator`.
+///
+/// All methods on instances of this class are thread-safe.
+class MeteredAllocator final : public AllocatorBase {
+public:
+    MeteredAllocator() noexcept;
+
+    static MeteredAllocator& unknown() noexcept;
+
+    /// Return the currently allocated number of bytes.
+    ///
+    /// This method is thread-safe, but may temporarily return slightly
+    /// inaccurate results if allocations/deallocations are happening while it
+    /// is being called.
+    std::size_t get_currently_allocated_bytes() const noexcept;
 
     /// Return the total number of bytes that have been allocated (including
     /// allocations that have since been freed).
@@ -60,93 +102,208 @@ class AllocationMetric : public AllocatorBase {
     /// This method is thread-safe.
     std::size_t get_total_allocated_bytes() const noexcept;
 
-    /// Return the number of bytes that have been freed.
+    /// Return the total number of bytes that have been freed.
     ///
-    /// This method is thread-safe, but may return slightly inaccurate results
-    /// due if allocations are happening while this method is being called.
+    /// This method is thread-safe.
     std::size_t get_total_deallocated_bytes() const noexcept;
 
     // AllocatorBase interface:
-    static AllocationMetric& get_default() noexcept; // Returns the component currently in scope.
+
+    /// Return a reference to an MeteredAllocator that belongs to the current
+    /// AllocationMetricsContext (if any) and the current AllocationMetricNameScope
+    /// (if any).
+    ///
+    /// The returned reference is valid for the duration of the lifetime of the
+    /// instance of AllocationMetricsContext that is "current" at the time of
+    /// calling this function, and namely it is valid beyond the lifetime of
+    /// the current AllocationMetricNameScope.
+    ///
+    /// If there is no current AllocationMetricsContext, the global "unknown"
+    /// tenant will be used.
+    ///
+    /// If no metric name is currently in scope (through the use of
+    /// AllocationMetricNameScope), allocations and deallocations will be counted
+    /// towards the default "unknown" metric.
+    ///
+    /// This method is thread-safe.
+    static MeteredAllocator& get_default() noexcept;
+
+    /// Allocate memory, accounting for the allocation in metrics.
+    ///
+    /// This method is thread-safe.
     void* allocate(size_t size, size_t align) override final;
+
+    /// Free memory, accounting for the deallocation in metrics.
+    ///
+    /// This method is thread-safe.
     void free(void* ptr, size_t size) noexcept override final;
-private:
-    const char* m_name;
-    // This is used to iterate over all existing components. Instances of
-    // AllocationMetric are expected to be statically allocated.
-    const AllocationMetric* m_next = nullptr;
 
-    // These members are aligned at 64 bytes to prevent false sharing
+    /// Notify metrics that an allocation happened.
+    ///
+    /// This method is thread-safe.
+    void did_allocate_bytes(std::size_t) noexcept;
+
+    /// Notify metrics that a deallocation happened.
+    ///
+    /// This method is thread-safe.
+    void did_free_bytes(std::size_t) noexcept;
+
+private:
+    std::atomic<std::size_t> m_allocated_bytes;
+    // These members are spaced by 64 bytes to prevent false sharing
     // (inter-processor CPU locks when multiple processes are modifying them
     // concurrently).
-    alignas(64) std::atomic<std::size_t> m_allocated_bytes;
-    alignas(64) std::atomic<std::size_t> m_deallocated_bytes;
-
-    void on_alloc(std::size_t) noexcept;
-    void on_free(std::size_t) noexcept;
+    char dummy[56];
+    std::atomic<std::size_t> m_deallocated_bytes;
+    char dummy2[56]; // Prevent false sharing with the next element.
 };
 
+/// `AllocationMetricsContext` represents a runtime scope for metrics, such as
+/// for instance a server running in a multi-tenant scenario, where each tenant
+/// would have one context associated with it.
+///
+/// `AllocationMetricsContext` is not available on mobile, due to lack of
+/// thread-local storage support on iOS.
+struct AllocationMetricsContext {
+public:
+    AllocationMetricsContext();
+    ~AllocationMetricsContext();
+
+#if !REALM_MOBILE
+    /// Get the thread-specific AllocationMetricsContext. If none has been set, a
+    /// reference to a  globally-allocated "unknown" tenant will be returned.
+    static AllocationMetricsContext& get_current() noexcept;
+#endif
+
+    /// Get the statically-allocated "unknown" tenant.
+    static AllocationMetricsContext& get_unknown();
 
-class AllocationMetricScope {
+    MeteredAllocator& get_metric(const AllocationMetricName& name) noexcept;
+private:
+    std::unique_ptr<MeteredAllocator[]> m_metrics;
+
+    // In debug builds, this is incremented/decremented by
+    // `AllocationMetricsContextScope`, and checked in the destructor, to avoid
+    // dangling references.
+    std::atomic<std::size_t> m_refcount;
+    friend class AllocationMetricsContextScope;
+};
+
+/// Open a scope where metered memory allocations are counted towards the given
+/// name.
+///
+/// Creating an instance of this class causes calls to
+/// `MeteredAllocator::get_default()` from the current thread to return a
+/// reference to an allocator that accounts for allocations/deallocations
+/// under the named metric specified as the constructor argument.
+///
+/// When such an instance is destroyed, the previous scope will come back
+/// in effect (if one exists; if none exists, the "unknown" metric will be
+/// used).
+///
+/// It is usually an error to create instances of this class with non-scope
+/// lifetime, for example on the heap. For that reason, `operator new` is
+/// disabled as a precaution.
+///
+/// If no `AllocationMetricsContext` is current (by instantiation of
+/// `AllocationMetricsContextScope`), metrics recorded in the scope introduced
+/// by this instance will count towards the "unknown" context, accessible by
+/// calling `AllocationMetricsContext::get_unknown()`.
+class AllocationMetricNameScope final {
 public:
     /// Establish a scope under which all allocations will be tracked as
-    /// belonging to \a component (for statistical purposes).
-    AllocationMetricScope(AllocationMetric& metric) noexcept;
-    ~AllocationMetricScope();
-    AllocationMetricScope(AllocationMetricScope&&) = delete;
-    AllocationMetricScope& operator=(AllocationMetricScope&&) = delete;
+    /// belonging to \a name.
+    explicit AllocationMetricNameScope(const AllocationMetricName& name) noexcept;
+    ~AllocationMetricNameScope();
+    AllocationMetricNameScope(AllocationMetricNameScope&&) = delete;
+    AllocationMetricNameScope& operator=(AllocationMetricNameScope&&) = delete;
+
+    void* operator new(std::size_t) = delete;
 private:
-    AllocationMetric& m_component;
-    AllocationMetric* m_previous = nullptr;
+    const AllocationMetricName& m_name;
+    const AllocationMetricName* m_previous = nullptr;
+};
+
+/// Open a scope using the given context for allocation metrics.
+///
+/// Creating an instance of this class causes calls to
+/// `AllocationMetricsContext::get_current()` to return the provided
+/// instance. This function is called when by `MeteredAllocator::get_default()`
+/// to return an instance that belongs to the given context.
+///
+/// When the instance is destroyed, the previous context will become active, or
+/// the "unknown" context if there was none.
+///
+/// It is usually an error to create instances of this class with non-scope
+/// lifetime, for example on the heap. For that reason, `operator new` is
+/// disabled as a precaution.
+class AllocationMetricsContextScope final {
+public:
+    explicit AllocationMetricsContextScope(AllocationMetricsContext& context) noexcept;
+    ~AllocationMetricsContextScope();
+    AllocationMetricsContextScope(AllocationMetricsContextScope&&) = delete;
+    AllocationMetricsContextScope& operator=(AllocationMetricsContextScope&&) = delete;
+
+    void* operator new(std::size_t) = delete;
+
+private:
+    AllocationMetricsContext& m_context;
+    AllocationMetricsContext& m_previous;
 };
 
 
 /// Convenience STL-compatible allocator that counts allocations as part of the
-/// current AllocationMetricScope.
+/// current AllocationMetricNameScope.
 template <class T>
-using MeteredAllocator = STLAllocator<T, AllocationMetric>;
+using MeteredSTLAllocator = STLAllocator<T, MeteredAllocator>;
+
 
 // Implementation:
 
-inline const char* AllocationMetric::name() const noexcept
+inline const char* AllocationMetricName::name() const noexcept
 {
     return m_name;
 }
 
-inline const AllocationMetric* AllocationMetric::next() const noexcept
+inline size_t AllocationMetricName::index() const noexcept
+{
+    return m_index;
+}
+
+inline const AllocationMetricName* AllocationMetricName::next() const noexcept
 {
     return m_next;
 }
 
-inline std::size_t AllocationMetric::get_allocated_bytes() const noexcept
+inline std::size_t MeteredAllocator::get_currently_allocated_bytes() const noexcept
 {
     return get_total_allocated_bytes() - get_total_deallocated_bytes();
 }
 
-inline std::size_t AllocationMetric::get_total_allocated_bytes() const noexcept
+inline std::size_t MeteredAllocator::get_total_allocated_bytes() const noexcept
 {
     return m_allocated_bytes.load(std::memory_order_relaxed);
 }
 
-inline std::size_t AllocationMetric::get_total_deallocated_bytes() const noexcept
+inline std::size_t MeteredAllocator::get_total_deallocated_bytes() const noexcept
 {
     return m_deallocated_bytes.load(std::memory_order_relaxed);
 }
 
-inline void* AllocationMetric::allocate(size_t size, size_t align)
+inline void* MeteredAllocator::allocate(size_t size, size_t align)
 {
     void* ptr = DefaultAllocator::get_default().allocate(size, align);
-    on_alloc(size);
+    did_allocate_bytes(size);
     return ptr;
 }
 
-inline void AllocationMetric::free(void* ptr, size_t size) noexcept
+inline void MeteredAllocator::free(void* ptr, size_t size) noexcept
 {
     DefaultAllocator::get_default().free(ptr, size);
-    on_free(size);
+    did_free_bytes(size);
 }
 
-inline void AllocationMetric::on_alloc(std::size_t size) noexcept
+inline void MeteredAllocator::did_allocate_bytes(std::size_t size) noexcept
 {
 #if !REALM_MOBILE
     m_allocated_bytes.fetch_add(size, std::memory_order_relaxed);
@@ -155,7 +312,7 @@ inline void AllocationMetric::on_alloc(std::size_t size) noexcept
 #endif
 }
 
-inline void AllocationMetric::on_free(std::size_t size) noexcept
+inline void MeteredAllocator::did_free_bytes(std::size_t size) noexcept
 {
 #if !REALM_MOBILE
     m_deallocated_bytes.fetch_add(size, std::memory_order_relaxed);
diff --git a/Pods/Realm/include/core/realm/util/buffer_stream.hpp b/Pods/Realm/include/core/realm/util/buffer_stream.hpp
index 65feb8b..be5064e 100644
--- a/Pods/Realm/include/core/realm/util/buffer_stream.hpp
+++ b/Pods/Realm/include/core/realm/util/buffer_stream.hpp
@@ -21,6 +21,7 @@
 #ifndef REALM_UTIL_BUFFER_STREAM_HPP
 #define REALM_UTIL_BUFFER_STREAM_HPP
 
+#include <cstddef>
 #include <sstream>
 
 namespace realm {
@@ -36,16 +37,18 @@ class BasicResettableExpandableOutputStreambuf: public std::basic_stringbuf<C,T,
     /// beginning of the output buffer without reallocating buffer memory.
     void reset() noexcept;
 
+    //@{
     /// Get a pointer to the beginning of the output buffer
     /// (std::basic_streambuf::pbase()). Note that this will change as the
     /// buffer is reallocated.
     char_type* data() noexcept;
     const char_type* data() const noexcept;
+    //@}
 
     /// Get the number of bytes written to the output buffer since the creation
     /// of the stream buffer, or since the last invocation of reset()
     /// (std::basic_streambuf::pptr() - std::basic_streambuf::pbase()).
-    std::streamsize size() const noexcept;
+    std::size_t size() const noexcept;
 };
 
 
@@ -59,12 +62,14 @@ class BasicResettableExpandableBufferOutputStream: public std::basic_ostream<C,T
     /// Calls BasicResettableExpandableOutputStreambuf::reset().
     void reset() noexcept;
 
+    //@{
     /// Calls BasicResettableExpandableOutputStreambuf::data().
     char_type* data() noexcept;
     const char_type* data() const noexcept;
+    //@}
 
     /// Calls BasicResettableExpandableOutputStreambuf::size().
-    std::streamsize size() const noexcept;
+    std::size_t size() const noexcept;
 
 private:
     BasicResettableExpandableOutputStreambuf<C,T,A> m_streambuf;
@@ -101,10 +106,10 @@ BasicResettableExpandableOutputStreambuf<C,T,A>::data() const noexcept
 }
 
 template<class C, class T, class A>
-inline std::streamsize BasicResettableExpandableOutputStreambuf<C,T,A>::size() const noexcept
+inline std::size_t BasicResettableExpandableOutputStreambuf<C,T,A>::size() const noexcept
 {
-    std::streamsize s = std::streamsize(this->pptr() - this->pbase());
-    return s;
+    std::size_t size = std::size_t(this->pptr() - this->pbase());
+    return size;
 }
 
 template<class C, class T, class A>
@@ -135,7 +140,7 @@ BasicResettableExpandableBufferOutputStream<C,T,A>::data() const noexcept
 }
 
 template<class C, class T, class A>
-inline std::streamsize BasicResettableExpandableBufferOutputStream<C,T,A>::size() const noexcept
+inline std::size_t BasicResettableExpandableBufferOutputStream<C,T,A>::size() const noexcept
 {
     return m_streambuf.size();
 }
diff --git a/Pods/Realm/include/core/realm/util/compression.hpp b/Pods/Realm/include/core/realm/util/compression.hpp
deleted file mode 100644
index 475a641..0000000
--- a/Pods/Realm/include/core/realm/util/compression.hpp
+++ /dev/null
@@ -1,159 +0,0 @@
-/*************************************************************************
- *
- * REALM CONFIDENTIAL
- * __________________
- *
- *  [2011] - [2016] Realm Inc
- *  All Rights Reserved.
- *
- * NOTICE:  All information contained herein is, and remains
- * the property of Realm Incorporated and its suppliers,
- * if any.  The intellectual and technical concepts contained
- * herein are proprietary to Realm Incorporated
- * and its suppliers and may be covered by U.S. and Foreign Patents,
- * patents in process, and are protected by trade secret or copyright law.
- * Dissemination of this information or reproduction of this material
- * is strictly forbidden unless prior written permission is obtained
- * from Realm Incorporated.
- *
- **************************************************************************/
-
-#ifndef REALM_UTIL_COMPRESSION_HPP
-#define REALM_UTIL_COMPRESSION_HPP
-
-#include <system_error>
-#include <vector>
-#include <string>
-#include <stdint.h>
-#include <stddef.h>
-#include <memory>
-
-#include <realm/binary_data.hpp>
-
-namespace realm {
-namespace util {
-namespace compression {
-
-enum class error {
-    out_of_memory = 1,
-    compress_buffer_too_small = 2,
-    compress_error = 3,
-    corrupt_input = 4,
-    incorrect_decompressed_size = 5,
-    decompress_error = 6
-};
-
-const std::error_category& error_category() noexcept;
-
-std::error_code make_error_code(error) noexcept;
-
-} // namespace compression
-} // namespace util
-} // namespace realm
-
-namespace std {
-
-template<> struct is_error_code_enum<realm::util::compression::error> {
-    static const bool value = true;
-};
-
-} // namespace std
-
-namespace realm {
-namespace util {
-namespace compression {
-
-class Alloc {
-public:
-    // Returns null on "out of memory"
-    virtual void* alloc(size_t size) = 0;
-    virtual void free(void* addr) noexcept = 0;
-    virtual ~Alloc() {}
-};
-
-class CompressMemoryArena: public Alloc {
-public:
-    void* alloc(size_t size) override final
-    {
-        size_t offset = m_offset;
-        size_t padding = offset % alignof (std::max_align_t);
-        if (padding > m_size - offset)
-            return nullptr;
-        offset += padding;
-        void* addr = m_buffer.get() + offset;
-        if (size > m_size - offset)
-            return nullptr;
-        m_offset = offset + size;
-        return addr;
-    }
-
-    void free(void*) noexcept override final
-    {
-        // No-op
-    }
-
-    void reset() noexcept
-    {
-        m_offset = 0;
-    }
-
-    size_t size() const noexcept
-    {
-        return m_size;
-    }
-
-    void resize(size_t size)
-    {
-        m_buffer = std::make_unique<char[]>(size); // Throws
-        m_size = size;
-        m_offset = 0;
-    }
-
-private:
-    size_t m_size = 0, m_offset = 0;
-    std::unique_ptr<char[]> m_buffer;
-};
-
-
-/// compress_bound() calculates an upper bound on the size of the compressed
-/// data. The caller can use this function to allocate memory buffer calling
-/// compress(). \a uncompressed_buf is the buffer with uncompressed data. The
-/// size of the uncompressed data is \a uncompressed_size. \a compression_level
-/// is described under compress(). \a bound is set to the upper bound at
-/// return. The returned error code is of category compression::error_category.
-std::error_code compress_bound(const char* uncompressed_buf, size_t uncompressed_size,
-                               size_t& bound, int compression_level = 1);
-
-/// compress() compresses the data in the \a uncompressed_buf of size \a
-/// uncompressed_size into \a compressed_buf. compress() resizes \a
-/// compressed_buf. At return, \a compressed_buf has the size of the compressed
-/// data. \a compression_level is [1-9] with 1 the fastest for the current zlib
-/// implementation. The returned error code is of category
-/// compression::error_category.
-std::error_code compress(const char* uncompressed_buf, size_t uncompressed_size,
-                         char* compressed_buf, size_t compressed_buf_size,
-                         size_t& compressed_size, int compression_level = 1,
-                         Alloc* custom_allocator = nullptr);
-
-/// decompress() decompresses the data in \param compressed_buf of size \a
-/// compresed_size into \a decompressed_buf. \a decompressed_size is the
-/// expected size of the decompressed data. \a decompressed_buf must have size
-/// at least \a decompressed_size. decompress() throws on errors, including the
-/// error where the size of the decompressed data is unequal to
-/// decompressed_size.  The returned error code is of category
-/// compression::error_category.
-std::error_code decompress(const char* compressed_buf, size_t compressed_size,
-                           char* decompressed_buf, size_t decompressed_size);
-
-
-size_t allocate_and_compress(CompressMemoryArena& compress_memory_arena,
-                             BinaryData uncompressed_buf,
-                             std::vector<char>& compressed_buf);
-
-
-
-} // namespace compression
-} // namespace util
-} // namespace realm
-
-#endif // REALM_UTIL_COMPRESSION_HPP
diff --git a/Pods/Realm/include/core/realm/util/config.h b/Pods/Realm/include/core/realm/util/config.h
index e0566a1..0ebbbe2 100644
--- a/Pods/Realm/include/core/realm/util/config.h
+++ b/Pods/Realm/include/core/realm/util/config.h
@@ -6,7 +6,7 @@
 
 // Realm-specific configuration
 #define REALM_MAX_BPNODE_SIZE 1000
-#define REALM_ENABLE_ASSERTIONS 0
+#define REALM_ENABLE_ASSERTIONS 1
 #define REALM_ENABLE_ALLOC_SET_ZERO 0
 #define REALM_ENABLE_ENCRYPTION 1
 #define REALM_ENABLE_MEMDEBUG 0
diff --git a/Pods/Realm/include/core/realm/util/duplicating_logger.hpp b/Pods/Realm/include/core/realm/util/duplicating_logger.hpp
new file mode 100644
index 0000000..774df3c
--- /dev/null
+++ b/Pods/Realm/include/core/realm/util/duplicating_logger.hpp
@@ -0,0 +1,63 @@
+/*************************************************************************
+ *
+ * REALM CONFIDENTIAL
+ * __________________
+ *
+ *  [2011] - [2016] Realm Inc
+ *  All Rights Reserved.
+ *
+ * NOTICE:  All information contained herein is, and remains
+ * the property of Realm Incorporated and its suppliers,
+ * if any.  The intellectual and technical concepts contained
+ * herein are proprietary to Realm Incorporated
+ * and its suppliers and may be covered by U.S. and Foreign Patents,
+ * patents in process, and are protected by trade secret or copyright law.
+ * Dissemination of this information or reproduction of this material
+ * is strictly forbidden unless prior written permission is obtained
+ * from Realm Incorporated.
+ *
+ **************************************************************************/
+
+#ifndef REALM_UTIL_DUPLICATING_LOGGER_HPP
+#define REALM_UTIL_DUPLICATING_LOGGER_HPP
+
+#include <realm/util/logger.hpp>
+
+
+namespace realm {
+namespace util {
+
+/// The log level threshold of a logger of this type will be decided by the
+/// associated base logger. Therefore, the log level threshold specified via the
+/// auxiliary logger will be ignored.
+///
+/// Loggers of this type are thread-safe if the base logger and the auxiliary
+/// loggers are both thread-safe.
+class DuplicatingLogger : public Logger {
+public:
+    explicit DuplicatingLogger(Logger& base_logger, Logger& aux_logger) noexcept;
+
+protected:
+    void do_log(Logger::Level, std::string message) override;
+
+private:
+    Logger& m_base_logger;
+    Logger& m_aux_logger;
+};
+
+
+
+
+// Implementation
+
+inline DuplicatingLogger::DuplicatingLogger(Logger& base_logger, Logger& aux_logger) noexcept :
+    Logger{base_logger.level_threshold},
+    m_base_logger{base_logger}, m_aux_logger{aux_logger}
+{
+}
+
+
+} // namespace util
+} // namespace realm
+
+#endif // REALM_UTIL_DUPLICATING_LOGGER_HPP
diff --git a/Pods/Realm/include/core/realm/util/encrypted_file_mapping.hpp b/Pods/Realm/include/core/realm/util/encrypted_file_mapping.hpp
index e110e97..6f5fd3c 100644
--- a/Pods/Realm/include/core/realm/util/encrypted_file_mapping.hpp
+++ b/Pods/Realm/include/core/realm/util/encrypted_file_mapping.hpp
@@ -54,7 +54,7 @@ class EncryptedFileMapping {
 
     // Make sure that memory in the specified range is synchronized with any
     // changes made globally visible through call to write_barrier
-    void read_barrier(const void* addr, size_t size, UniqueLock& lock, Header_to_size header_to_size);
+    void read_barrier(const void* addr, size_t size, Header_to_size header_to_size);
 
     // Ensures that any changes made to memory in the specified range
     // becomes visible to any later calls to read_barrier()
@@ -64,9 +64,26 @@ class EncryptedFileMapping {
     // Flushes any remaining dirty pages from the old mapping
     void set(void* new_addr, size_t new_size, size_t new_file_offset);
 
+    size_t collect_decryption_count()
+    {
+        return m_num_decrypted;
+    }
+    // reclaim any untouched pages - this is thread safe with respect to
+    // concurrent access/touching of pages - but must be called with the mutex locked.
+    void reclaim_untouched(size_t& progress_ptr, size_t& accumulated_savings) noexcept;
+
     bool contains_page(size_t page_in_file) const;
     size_t get_local_index_of_address(const void* addr, size_t offset = 0) const;
 
+    size_t get_end_index()
+    {
+        return m_first_page + m_page_state.size();
+    }
+    size_t get_start_index()
+    {
+        return m_first_page;
+    }
+
 private:
     SharedFileInfo& m_file;
 
@@ -76,11 +93,36 @@ class EncryptedFileMapping {
     void* m_addr = nullptr;
 
     size_t m_first_page;
-
-    // MUST be of type char because of coherence issues when writing inside mutex and reading outside 
-    // it. FIXME: We're investigating if this is good enough, or if we need further mechanisms
-    std::vector<char> m_up_to_date_pages;
-    std::vector<bool> m_dirty_pages;
+    size_t m_num_decrypted; // 1 for every page decrypted
+
+    enum PageState {
+        Touched = 1,           // a ref->ptr translation has taken place
+        UpToDate = 2,          // the page is fully up to date
+        PartiallyUpToDate = 4, // the page is valid for old translations, but requires re-decryption for new
+        Dirty = 8              // the page has been modified with respect to what's on file.
+    };
+    std::vector<PageState> m_page_state;
+    // little helpers:
+    inline void clear(PageState& ps, int p)
+    {
+        ps = PageState(ps & ~p);
+    }
+    inline bool is_not(PageState& ps, int p)
+    {
+        return (ps & p) == 0;
+    }
+    inline bool is(PageState& ps, int p)
+    {
+        return (ps & p) != 0;
+    }
+    inline void set(PageState& ps, int p)
+    {
+        ps = PageState(ps | p);
+    }
+    // 1K pages form a chunk - this array allows us to skip entire chunks during scanning
+    std::vector<bool> m_chunk_dont_scan;
+    static constexpr int page_to_chunk_shift = 10;
+    static constexpr size_t page_to_chunk_factor = size_t(1) << page_to_chunk_shift;
 
     File::AccessMode m_access;
 
@@ -94,7 +136,8 @@ class EncryptedFileMapping {
     bool copy_up_to_date_page(size_t local_page_ndx) noexcept;
     void refresh_page(size_t local_page_ndx);
     void write_page(size_t local_page_ndx) noexcept;
-
+    void write_and_update_all(size_t local_page_ndx, size_t begin_offset, size_t end_offset) noexcept;
+    void reclaim_page(size_t page_ndx);
     void validate_page(size_t local_page_ndx) noexcept;
     void validate() noexcept;
 };
@@ -104,7 +147,7 @@ inline size_t EncryptedFileMapping::get_local_index_of_address(const void* addr,
     REALM_ASSERT_EX(addr >= m_addr, addr, m_addr);
 
     size_t local_ndx = ((reinterpret_cast<uintptr_t>(addr) - reinterpret_cast<uintptr_t>(m_addr) + offset) >> m_page_shift);
-    REALM_ASSERT_EX(local_ndx < m_up_to_date_pages.size(), local_ndx, m_up_to_date_pages.size());
+    REALM_ASSERT_EX(local_ndx < m_page_state.size(), local_ndx, m_page_state.size());
     return local_ndx;
 }
 
@@ -112,48 +155,10 @@ inline bool EncryptedFileMapping::contains_page(size_t page_in_file) const
 {
     // first check for (page_in_file >= m_first_page) so that the following
     // subtraction using unsigned types never wraps under 0
-    return page_in_file >= m_first_page && page_in_file - m_first_page < m_up_to_date_pages.size();
+    return page_in_file >= m_first_page && page_in_file - m_first_page < m_page_state.size();
 }
 
-inline void EncryptedFileMapping::read_barrier(const void* addr, size_t size, UniqueLock& lock,
-                                               Header_to_size header_to_size)
-{
-    size_t first_accessed_local_page = get_local_index_of_address(addr);
-
-    // make sure the first page is available
-    // Checking before taking the lock is important to performance.
-    if (!m_up_to_date_pages[first_accessed_local_page]) {
-        if (!lock.holds_lock())
-            lock.lock();
-        // after taking the lock, we must repeat the check so that we never
-        // call refresh_page() on a page which is already up to date.
-        if (!m_up_to_date_pages[first_accessed_local_page])
-            refresh_page(first_accessed_local_page);
-    }
-
-    if (header_to_size) {
-
-        // We know it's an array, and array headers are 8-byte aligned, so it is
-        // included in the first page which was handled above.
-        size = header_to_size(static_cast<const char*>(addr));
-    }
 
-    size_t last_idx = get_local_index_of_address(addr, size == 0 ? 0 : size - 1);
-    size_t up_to_date_pages_size = m_up_to_date_pages.size();
-
-    // We already checked first_accessed_local_page above, so we start the loop
-    // at first_accessed_local_page + 1 to check the following page.
-    for (size_t idx = first_accessed_local_page + 1; idx <= last_idx && idx < up_to_date_pages_size; ++idx) {
-        if (!m_up_to_date_pages[idx]) {
-            if (!lock.holds_lock())
-                lock.lock();
-            // after taking the lock, we must repeat the check so that we never
-            // call refresh_page() on a page which is already up to date.
-            if (!m_up_to_date_pages[idx])
-                refresh_page(idx);
-        }
-    }
-}
 }
 }
 
diff --git a/Pods/Realm/include/core/realm/util/features.h b/Pods/Realm/include/core/realm/util/features.h
index 59e3d14..ed6d55a 100644
--- a/Pods/Realm/include/core/realm/util/features.h
+++ b/Pods/Realm/include/core/realm/util/features.h
@@ -27,7 +27,9 @@
 #define NOMINMAX
 #endif
 
+#ifndef REALM_NO_CONFIG
 #include <realm/util/config.h>
+#endif
 
 /* The maximum number of elements in a B+-tree node. Applies to inner nodes and
  * to leaves. The minimum allowable value is 2.
@@ -71,6 +73,8 @@
 
 #if REALM_HAS_CPP_ATTRIBUTE(clang::fallthrough)
 #define REALM_FALLTHROUGH [[clang::fallthrough]]
+#elif REALM_HAS_CPP_ATTRIBUTE(gnu::fallthrough)
+#define REALM_FALLTHROUGH [[gnu::fallthrough]]
 #elif REALM_HAS_CPP_ATTRIBUTE(fallthrough)
 #define REALM_FALLTHROUGH [[fallthrough]]
 #else
@@ -311,4 +315,30 @@
 #define REALM_ARCHITECTURE_X86_64 0
 #endif
 
+// Address Sanitizer
+#if defined(__has_feature) // Clang
+#  if __has_feature(address_sanitizer)
+#    define REALM_SANITIZE_ADDRESS 1
+#  else
+#    define REALM_SANITIZE_ADDRESS 0
+#  endif
+#elif defined(__SANITIZE_ADDRESS__) && __SANITIZE_ADDRESS__ // GCC
+#  define REALM_SANITIZE_ADDRESS 1
+#else
+#  define REALM_SANITIZE_ADDRESS 0
+#endif
+
+// Thread Sanitizer
+#if defined(__has_feature) // Clang
+#  if __has_feature(thread_sanitizer)
+#    define REALM_SANITIZE_THREAD 1
+#  else
+#    define REALM_SANITIZE_THREAD 0
+#  endif
+#elif defined(__SANITIZE_THREAD__) && __SANITIZE_THREAD__ // GCC
+#  define REALM_SANITIZE_THREAD 1
+#else
+#  define REALM_SANITIZE_THREAD 0
+#endif
+
 #endif /* REALM_UTIL_FEATURES_H */
diff --git a/Pods/Realm/include/core/realm/util/fifo_helper.hpp b/Pods/Realm/include/core/realm/util/fifo_helper.hpp
new file mode 100644
index 0000000..6ca8d75
--- /dev/null
+++ b/Pods/Realm/include/core/realm/util/fifo_helper.hpp
@@ -0,0 +1,43 @@
+/*************************************************************************
+ *
+ * Copyright 2019 Realm Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ **************************************************************************/
+
+#ifndef REALM_UTIL_FIFO_HELPER_HPP
+#define REALM_UTIL_FIFO_HELPER_HPP
+
+#include <string>
+
+namespace realm {
+namespace util {
+
+// Attempts to create a FIFO file at the location determined by `path`.
+// If creating the FIFO at this location fails, an exception is thrown.
+// If a FIFO already exists at the given location, this method does nothing.
+void create_fifo(std::string path); // throws
+
+// Same as above, but returns `false` if the FIFO could not be created instead of throwing.
+bool try_create_fifo(const std::string& path);
+
+// Ensure that a path representing a directory ends with `/`
+inline std::string normalize_dir(const std::string& path) {
+    return (!path.empty() && path.back() != '/') ? path + '/' : path;
+}
+
+} // namespace util
+} // namespace realm
+
+#endif // REALM_UTIL_FIFO_HELPER_HPP
diff --git a/Pods/Realm/include/core/realm/util/file.hpp b/Pods/Realm/include/core/realm/util/file.hpp
index d85d222..797dd88 100644
--- a/Pods/Realm/include/core/realm/util/file.hpp
+++ b/Pods/Realm/include/core/realm/util/file.hpp
@@ -26,6 +26,7 @@
 #include <stdexcept>
 #include <string>
 #include <streambuf>
+#include <iostream>
 
 #ifndef _WIN32
 #include <dirent.h> // POSIX.1-2001
@@ -300,7 +301,7 @@ class File {
     ///
     /// \sa prealloc()
     /// \sa is_prealloc_supported()
-    void prealloc_if_supported(SizeType offset, size_t size);
+    bool prealloc_if_supported(SizeType offset, size_t size);
 
     /// See prealloc_if_supported().
     static bool is_prealloc_supported();
@@ -544,13 +545,18 @@ class File {
 #else
         // NDK r10e has a bug in sys/stat.h dev_t ino_t are 4 bytes,
         // but stat.st_dev and st_ino are 8 bytes. So we just use uint64 instead.
-        uint_fast64_t device;
+        dev_t device;
         uint_fast64_t inode;
 #endif
     };
     // Return the unique id for the current opened file descriptor.
     // Same UniqueID means they are the same file.
     UniqueID get_unique_id() const;
+    // Return the file descriptor for the file
+    FileDesc get_descriptor() const;
+    // Return the path of the open file, or an empty string if
+    // this file has never been opened.
+    std::string get_path() const;
     // Return false if the file doesn't exist. Otherwise uid will be set.
     static bool get_unique_id(const std::string& path, UniqueID& uid);
 
@@ -580,6 +586,7 @@ class File {
     int m_fd;
 #endif
     std::unique_ptr<const char[]> m_encryption_key = nullptr;
+    std::string m_path;
 
     bool lock(bool exclusive, bool non_blocking);
     void open_internal(const std::string& path, AccessMode, CreateMode, int flags, bool* success);
@@ -853,7 +860,7 @@ class File::UnmapGuard {
 /// Only output is supported at this point.
 class File::Streambuf : public std::streambuf {
 public:
-    explicit Streambuf(File*);
+    explicit Streambuf(File*, size_t = 4096);
     ~Streambuf() noexcept;
 
     // Disable copying
@@ -861,8 +868,6 @@ class File::Streambuf : public std::streambuf {
     Streambuf& operator=(const Streambuf&) = delete;
 
 private:
-    static const size_t buffer_size = 4096;
-
     File& m_file;
     std::unique_ptr<char[]> const m_buffer;
 
@@ -872,10 +877,9 @@ class File::Streambuf : public std::streambuf {
     void flush();
 };
 
-
 /// Used for any I/O related exception. Note the derived exception
 /// types that are used for various specific types of errors.
-class File::AccessError : public std::runtime_error {
+class File::AccessError : public ExceptionWithBacktrace<std::runtime_error> {
 public:
     AccessError(const std::string& msg, const std::string& path);
 
@@ -883,8 +887,17 @@ class File::AccessError : public std::runtime_error {
     /// no associated file system path, or if the file system path is unknown.
     std::string get_path() const;
 
+    const char* message() const noexcept
+    {
+        m_buffer = std::runtime_error::what();
+        if (m_path.size() > 0)
+            m_buffer += (std::string(" Path: ") + m_path);
+        return m_buffer.c_str();
+    }
+
 private:
     std::string m_path;
+    mutable std::string m_buffer;
 };
 
 
@@ -1096,7 +1109,10 @@ inline void File::MapBase::remap(const File& f, AccessMode a, size_t size, int m
 {
     REALM_ASSERT(m_addr);
 
-    m_addr = f.remap(m_addr, m_size, a, size, map_flags);
+    //m_addr = f.remap(m_addr, m_size, a, size, map_flags);
+    // missing sync() here?
+    unmap();
+    map(f, a, size, map_flags);
     m_size = size;
     m_fd = f.m_fd;
 }
@@ -1184,7 +1200,7 @@ inline T* File::Map<T>::release() noexcept
 }
 
 
-inline File::Streambuf::Streambuf(File* f)
+inline File::Streambuf::Streambuf(File* f, size_t buffer_size)
     : m_file(*f)
     , m_buffer(new char[buffer_size])
 {
@@ -1239,7 +1255,7 @@ inline void File::Streambuf::flush()
 }
 
 inline File::AccessError::AccessError(const std::string& msg, const std::string& path)
-    : std::runtime_error(msg)
+    : ExceptionWithBacktrace<std::runtime_error>(msg)
     , m_path(path)
 {
 }
diff --git a/Pods/Realm/include/core/realm/util/file_mapper.hpp b/Pods/Realm/include/core/realm/util/file_mapper.hpp
index 488ae94..d02f15d 100644
--- a/Pods/Realm/include/core/realm/util/file_mapper.hpp
+++ b/Pods/Realm/include/core/realm/util/file_mapper.hpp
@@ -24,6 +24,8 @@
 #include <realm/util/thread.hpp>
 #include <realm/util/encrypted_file_mapping.hpp>
 
+#include <functional>
+
 namespace realm {
 namespace util {
 
@@ -40,8 +42,54 @@ void msync(FileDesc fd, void* addr, size_t size);
 using HeaderToSize = size_t (*)(const char* addr);
 class EncryptedFileMapping;
 
+class PageReclaimGovernor {
+public:
+    // Called by the page reclaimer with the current load (in bytes) and
+    // must return the target load (also in bytes). Returns no_match if no
+	// target can be set
+	static constexpr int64_t no_match = -1;
+    virtual std::function<int64_t()> current_target_getter(size_t load) = 0;
+    virtual void report_target_result(int64_t) = 0;
+};
+
+// Set a page reclaim governor. The governor is an object with a method which will be called periodically
+// and must return a 'target' amount of memory to hold decrypted pages. The page reclaim daemon
+// will then try to release pages to meet the target. The governor is called with the current
+// amount of data used, for the purpose of logging - or possibly for computing the target
+//
+// The governor is called approximately once per second.
+//
+// If no governor is installed, the page reclaim daemon will not start.
+void set_page_reclaim_governor(PageReclaimGovernor* governor);
+
+// Use the default governor. The default governor is used automatically if nothing else is set, so
+// this funciton is mostly useful for tests where changing back to the default could be desirable.
+inline void set_page_reclaim_governor_to_default()
+{
+    set_page_reclaim_governor(nullptr);
+}
+
+// Retrieves the number of in memory decrypted pages, across all open files.
+size_t get_num_decrypted_pages();
+
+// Retrieves the
+// - amount of memory used for decrypted pages, across all open files.
+// - current target for the reclaimer (desired number of decrypted pages)
+// - current workload size for the reclaimer, across all open files.
+struct decrypted_memory_stats_t {
+    size_t memory_size;
+    size_t reclaimer_target;
+    size_t reclaimer_workload;
+};
+
+decrypted_memory_stats_t get_decrypted_memory_stats();
+
 #if REALM_ENABLE_ENCRYPTION
 
+void encryption_note_reader_start(SharedFileInfo& info, const void* reader_id);
+void encryption_note_reader_end(SharedFileInfo& info, const void* reader_id) noexcept;
+
+SharedFileInfo* get_file_info_for_file(File& file);
 
 // This variant allows the caller to obtain direct access to the encrypted file mapping
 // for optimization purposes.
@@ -72,8 +120,8 @@ extern util::Mutex& mapping_mutex;
 inline void do_encryption_read_barrier(const void* addr, size_t size, HeaderToSize header_to_size,
                                        EncryptedFileMapping* mapping)
 {
-    UniqueLock lock(mapping_mutex, defer_lock_tag());
-    mapping->read_barrier(addr, size, lock, header_to_size);
+    UniqueLock lock(mapping_mutex);
+    mapping->read_barrier(addr, size, header_to_size);
 }
 
 inline void do_encryption_write_barrier(const void* addr, size_t size, EncryptedFileMapping* mapping)
@@ -82,18 +130,29 @@ inline void do_encryption_write_barrier(const void* addr, size_t size, Encrypted
     mapping->write_barrier(addr, size);
 }
 
-
 #else
-void inline encryption_read_barrier(const void*, size_t, EncryptedFileMapping*, HeaderToSize header_to_size = nullptr)
+
+void inline set_page_reclaim_governor(PageReclaimGovernor*)
 {
-    static_cast<void>(header_to_size);
 }
+
+size_t inline get_num_decrypted_pages()
+{
+    return 0;
+}
+
+void inline encryption_read_barrier(const void*, size_t, EncryptedFileMapping*, HeaderToSize = nullptr)
+{
+}
+
 void inline encryption_write_barrier(const void*, size_t)
 {
 }
+
 void inline encryption_write_barrier(const void*, size_t, EncryptedFileMapping*)
 {
 }
+
 #endif
 
 // helpers for encrypted Maps
diff --git a/Pods/Realm/include/core/realm/util/fixed_size_buffer.hpp b/Pods/Realm/include/core/realm/util/fixed_size_buffer.hpp
new file mode 100644
index 0000000..8a512ee
--- /dev/null
+++ b/Pods/Realm/include/core/realm/util/fixed_size_buffer.hpp
@@ -0,0 +1,135 @@
+/*************************************************************************
+ *
+ * Copyright 2019 Realm Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ **************************************************************************/
+
+#ifndef REALM_UTIL_FIXED_SIZE_BUFFER_HPP
+#define REALM_UTIL_FIXED_SIZE_BUFFER_HPP
+
+#include <vector>
+#include <cstddef>
+#include <stdexcept>
+
+namespace realm {
+namespace util {
+
+/// This is a buffer with a fixed size. You can only insert elements.
+/// When the number of elements inserted matches the size of the buffer,
+/// additional insertions will overwrite the oldest elements.
+template <class T>
+class FixedSizeBuffer {
+public:
+    class iterator;
+
+    FixedSizeBuffer(size_t sz)
+        : m_size(sz)
+    {
+        if (sz == 0)
+            throw std::runtime_error("FixedSizeBuffer size cannot be 0");
+        m_buffer.reserve(sz);
+    }
+    size_t size()
+    {
+        return m_buffer.size();
+    }
+    void insert(const T& val)
+    {
+        if (m_buffer.size() < m_size) {
+            m_buffer.emplace_back(val);
+        }
+        else {
+            m_buffer[m_oldest] = val;
+            ++m_oldest;
+            if (m_oldest == m_size)
+                m_oldest = 0;
+        }
+    }
+    T& at(size_t n)
+    {
+        auto idx = (n + m_oldest) % m_size;
+        return m_buffer[idx];
+    }
+    T& operator[](size_t n)
+    {
+        return at(n);
+    }
+    iterator begin()
+    {
+        return iterator(*this, 0);
+    }
+    iterator end()
+    {
+        return iterator(*this, m_buffer.size());
+    }
+
+private:
+    std::vector<T> m_buffer;
+    size_t m_size;
+    size_t m_oldest = 0;
+};
+
+template <class T>
+class FixedSizeBuffer<T>::iterator {
+public:
+    typedef std::forward_iterator_tag iterator_category;
+    typedef T value_type;
+    typedef ptrdiff_t difference_type;
+    typedef T* pointer;
+    typedef T& reference;
+
+    iterator(FixedSizeBuffer<T>& b, size_t ndx)
+        : m_cb(b)
+        , m_ndx(ndx)
+    {
+    }
+    pointer operator->()
+    {
+        return &m_cb[m_ndx];
+    }
+    reference operator*()
+    {
+        return m_cb[m_ndx];
+    }
+    iterator& operator++()
+    {
+        ++m_ndx;
+        return *this;
+    }
+    iterator operator++(int)
+    {
+        iterator tmp(*this);
+        operator++();
+        return tmp;
+    }
+    bool operator!=(const iterator& rhs)
+    {
+        return m_ndx != rhs.m_ndx;
+    }
+    bool operator==(const iterator& rhs)
+    {
+        return m_ndx == rhs.m_ndx;
+    }
+
+private:
+    FixedSizeBuffer<T>& m_cb;
+    size_t m_ndx;
+};
+
+} // namespace util
+} // namespace realm
+
+
+#endif /* REALM_UTIL_FIXED_SIZE_BUFFER_HPP */
diff --git a/Pods/Realm/include/core/realm/util/http.hpp b/Pods/Realm/include/core/realm/util/http.hpp
index 5b15fe6..91da876 100644
--- a/Pods/Realm/include/core/realm/util/http.hpp
+++ b/Pods/Realm/include/core/realm/util/http.hpp
@@ -21,6 +21,8 @@
 #ifndef REALM_UTIL_HTTP_HPP
 #define REALM_UTIL_HTTP_HPP
 
+#include <cstdint>
+#include <type_traits>
 #include <map>
 #include <system_error>
 #include <iosfwd>
@@ -29,6 +31,7 @@
 #include <realm/util/optional.hpp>
 #include <realm/util/network.hpp>
 #include <realm/util/logger.hpp>
+#include <realm/util/string_view.hpp>
 #include <realm/string_data.hpp>
 
 namespace realm {
@@ -46,8 +49,7 @@ std::error_code make_error_code(HTTPParserError);
 } // namespace realm
 
 namespace std {
-    template<>
-    struct is_error_code_enum<realm::util::HTTPParserError>: std::true_type {};
+template<> struct is_error_code_enum<realm::util::HTTPParserError> : std::true_type {};
 }
 
 namespace realm {
@@ -139,8 +141,15 @@ struct HTTPAuthorization {
 
 HTTPAuthorization parse_authorization(const std::string&);
 
-struct CaseInsensitiveCompare {
-    bool operator()(const std::string& a, const std::string& b) const
+class HeterogeneousCaseInsensitiveCompare {
+public:
+    using is_transparent = std::true_type;
+    template<class A, class B> bool operator()(const A& a, const B& b) const noexcept
+    {
+        return comp(StringView(a), StringView(b));
+    }
+private:
+    bool comp(StringView a, StringView b) const noexcept
     {
         auto cmp = [](char lhs, char rhs) {
             return std::tolower(lhs, std::locale::classic()) <
@@ -151,7 +160,7 @@ struct CaseInsensitiveCompare {
 };
 
 /// Case-insensitive map suitable for storing HTTP headers.
-using HTTPHeaders = std::map<std::string, std::string, CaseInsensitiveCompare>;
+using HTTPHeaders = std::map<std::string, std::string, HeterogeneousCaseInsensitiveCompare>;
 
 struct HTTPRequest {
     HTTPMethod method = HTTPMethod::Get;
@@ -167,6 +176,7 @@ struct HTTPRequest {
 
 struct HTTPResponse {
     HTTPStatus status = HTTPStatus::Unknown;
+    std::string reason;
     HTTPHeaders headers;
 
     // A body is only read from the response stream if the server sent the
@@ -186,6 +196,7 @@ std::ostream& operator<<(std::ostream&, HTTPMethod);
 /// Serialize HTTP status to output stream, include reason string ("200 OK" etc.)
 std::ostream& operator<<(std::ostream&, HTTPStatus);
 
+
 struct HTTPParserBase {
     util::Logger& logger;
 
@@ -244,6 +255,7 @@ struct HTTPParserBase {
     void set_write_buffer(const HTTPResponse&);
 };
 
+
 template<class Socket>
 struct HTTPParser: protected HTTPParserBase {
     explicit HTTPParser(Socket& socket, util::Logger& logger):
@@ -335,6 +347,7 @@ struct HTTPParser: protected HTTPParserBase {
     Socket& m_socket;
 };
 
+
 template<class Socket>
 struct HTTPClient: protected HTTPParser<Socket> {
     using Handler = void(HTTPResponse, std::error_code);
@@ -387,7 +400,7 @@ struct HTTPClient: protected HTTPParser<Socket> {
         StringData reason;
         if (this->parse_first_line_of_response(line, status, reason, this->logger)) {
             m_response.status = status;
-            static_cast<void>(reason); // Ignore for now.
+            m_response.reason = reason;
             return std::error_code{};
         }
         return HTTPParserError::MalformedResponse;
@@ -413,6 +426,7 @@ struct HTTPClient: protected HTTPParser<Socket> {
     }
 };
 
+
 template<class Socket>
 struct HTTPServer: protected HTTPParser<Socket> {
     using RequestHandler = void(HTTPRequest, std::error_code);
@@ -517,9 +531,11 @@ struct HTTPServer: protected HTTPParser<Socket> {
     }
 };
 
+
+std::string make_http_host(bool is_ssl, StringView address, std::uint_fast16_t port);
+
 } // namespace util
 } // namespace realm
 
 
 #endif // REALM_UTIL_HTTP_HPP
-
diff --git a/Pods/Realm/include/core/realm/util/memory_stream.hpp b/Pods/Realm/include/core/realm/util/memory_stream.hpp
index 51584e8..81a4852 100644
--- a/Pods/Realm/include/core/realm/util/memory_stream.hpp
+++ b/Pods/Realm/include/core/realm/util/memory_stream.hpp
@@ -116,11 +116,11 @@ inline MemoryInputStreambuf::~MemoryInputStreambuf() noexcept
 {
 }
 
-inline void MemoryInputStreambuf::set_buffer(const char* begin, const char* end) noexcept
+inline void MemoryInputStreambuf::set_buffer(const char* b, const char* e) noexcept
 {
-    m_begin = begin;
-    m_end = end;
-    m_curr = begin;
+    m_begin = b;
+    m_end = e;
+    m_curr = b;
 }
 
 
@@ -132,9 +132,9 @@ inline MemoryOutputStreambuf::~MemoryOutputStreambuf() noexcept
 {
 }
 
-inline void MemoryOutputStreambuf::set_buffer(char* begin, char* end) noexcept
+inline void MemoryOutputStreambuf::set_buffer(char* b, char* e) noexcept
 {
-    setp(begin, end);
+    setp(b, e);
 }
 
 inline size_t MemoryOutputStreambuf::size() const noexcept
@@ -152,31 +152,31 @@ inline MemoryInputStream::~MemoryInputStream() noexcept
 {
 }
 
-inline void MemoryInputStream::set_buffer(const char* begin, const char* end) noexcept
+inline void MemoryInputStream::set_buffer(const char* b, const char* e) noexcept
 {
-    m_streambuf.set_buffer(begin, end);
+    m_streambuf.set_buffer(b, e);
     clear();
 }
 
 template <size_t N> inline void MemoryInputStream::set_buffer(const char (&buffer)[N]) noexcept
 {
-    const char* begin = buffer;
-    const char* end = begin + N;
-    set_buffer(begin, end);
+    const char* b = buffer;
+    const char* e = b + N;
+    set_buffer(b, e);
 }
 
 inline void MemoryInputStream::set_string(const std::string& str) noexcept
 {
-    const char* begin = str.data();
-    const char* end = begin + str.size();
-    set_buffer(begin, end);
+    const char* b = str.data();
+    const char* e = b + str.size();
+    set_buffer(b, e);
 }
 
 inline void MemoryInputStream::set_c_string(const char* c_str) noexcept
 {
-    const char* begin = c_str;
-    const char* end = begin + traits_type::length(c_str);
-    set_buffer(begin, end);
+    const char* b = c_str;
+    const char* e = b + traits_type::length(c_str);
+    set_buffer(b, e);
 }
 
 
@@ -189,9 +189,9 @@ inline MemoryOutputStream::~MemoryOutputStream() noexcept
 {
 }
 
-inline void MemoryOutputStream::set_buffer(char* begin, char* end) noexcept
+inline void MemoryOutputStream::set_buffer(char* b, char* e) noexcept
 {
-    m_streambuf.set_buffer(begin, end);
+    m_streambuf.set_buffer(b, e);
     clear();
 }
 
diff --git a/Pods/Realm/include/core/realm/util/metered/deque.hpp b/Pods/Realm/include/core/realm/util/metered/deque.hpp
index 792656d..41c1b71 100644
--- a/Pods/Realm/include/core/realm/util/metered/deque.hpp
+++ b/Pods/Realm/include/core/realm/util/metered/deque.hpp
@@ -27,7 +27,7 @@ namespace realm {
 namespace util {
 namespace metered {
 /// Vector with metered allocation
-template <class T, class Alloc = MeteredAllocator<T>>
+template <class T, class Alloc = MeteredSTLAllocator<T>>
 using deque = std::deque<T, Alloc>;
 } // namespace metered
 } // namespace util
diff --git a/Pods/Realm/include/core/realm/util/metered/map.hpp b/Pods/Realm/include/core/realm/util/metered/map.hpp
index 7e11f97..be03f9e 100644
--- a/Pods/Realm/include/core/realm/util/metered/map.hpp
+++ b/Pods/Realm/include/core/realm/util/metered/map.hpp
@@ -31,7 +31,7 @@ namespace metered {
 template <class K,
           class V,
           class Compare = std::less<>,
-          class Alloc = MeteredAllocator<std::pair<const K, V>>>
+          class Alloc = MeteredSTLAllocator<std::pair<const K, V>>>
 using map = std::map<K, V, Compare, Alloc>;
 } // namespace metered
 } // namespace util
diff --git a/Pods/Realm/include/core/realm/util/metered/set.hpp b/Pods/Realm/include/core/realm/util/metered/set.hpp
index 6962bca..95f1e73 100644
--- a/Pods/Realm/include/core/realm/util/metered/set.hpp
+++ b/Pods/Realm/include/core/realm/util/metered/set.hpp
@@ -28,7 +28,7 @@ namespace util {
 namespace metered {
 /// Set with metered allocation. Additionally, the default Compare is changed to
 /// `std::less<>` instead of `std::less<K>`, which allows heterogenous lookup.
-template <class T, class Compare = std::less<>, class Alloc = MeteredAllocator<T>>
+template <class T, class Compare = std::less<>, class Alloc = MeteredSTLAllocator<T>>
 using set = std::set<T, Compare, Alloc>;
 } // namespace metered
 } // namespace util
diff --git a/Pods/Realm/include/core/realm/util/metered/string.hpp b/Pods/Realm/include/core/realm/util/metered/string.hpp
index a879fba..b3a52db 100644
--- a/Pods/Realm/include/core/realm/util/metered/string.hpp
+++ b/Pods/Realm/include/core/realm/util/metered/string.hpp
@@ -27,7 +27,7 @@ namespace realm {
 namespace util {
 namespace metered {
 /// String with metered allocation
-using string = std::basic_string<char, std::char_traits<char>, MeteredAllocator<char>>;
+using string = std::basic_string<char, std::char_traits<char>, MeteredSTLAllocator<char>>;
 } // namespace metered
 } // namespace util
 } // namespace realm
diff --git a/Pods/Realm/include/core/realm/util/metered/unordered_map.hpp b/Pods/Realm/include/core/realm/util/metered/unordered_map.hpp
index 222aa8a..8ead21a 100644
--- a/Pods/Realm/include/core/realm/util/metered/unordered_map.hpp
+++ b/Pods/Realm/include/core/realm/util/metered/unordered_map.hpp
@@ -31,7 +31,7 @@ template <class K,
           class V,
           class Hash = std::hash<K>,
           class KeyEqual = std::equal_to<K>,
-          class Alloc = MeteredAllocator<std::pair<const K, V>>>
+          class Alloc = MeteredSTLAllocator<std::pair<const K, V>>>
 using unordered_map = std::unordered_map<K, V, Hash, KeyEqual, Alloc>;
 } // namespace metered
 } // namespace util
diff --git a/Pods/Realm/include/core/realm/util/metered/unordered_set.hpp b/Pods/Realm/include/core/realm/util/metered/unordered_set.hpp
index 28c3391..ad0dc5f 100644
--- a/Pods/Realm/include/core/realm/util/metered/unordered_set.hpp
+++ b/Pods/Realm/include/core/realm/util/metered/unordered_set.hpp
@@ -30,7 +30,7 @@ namespace metered {
 template <class T,
           class Hash = std::hash<T>,
           class KeyEqual = std::equal_to<T>,
-          class Alloc = MeteredAllocator<T>>
+          class Alloc = MeteredSTLAllocator<T>>
 using unordered_set = std::unordered_set<T, Hash, KeyEqual, Alloc>;
 } // namespace metered
 } // namespace util
diff --git a/Pods/Realm/include/core/realm/util/metered/vector.hpp b/Pods/Realm/include/core/realm/util/metered/vector.hpp
index bcd0ed8..cbbf177 100644
--- a/Pods/Realm/include/core/realm/util/metered/vector.hpp
+++ b/Pods/Realm/include/core/realm/util/metered/vector.hpp
@@ -27,7 +27,7 @@ namespace realm {
 namespace util {
 namespace metered {
 /// Vector with metered allocation
-template <class T, class Alloc = MeteredAllocator<T>>
+template <class T, class Alloc = MeteredSTLAllocator<T>>
 using vector = std::vector<T, Alloc>;
 } // namespace metered
 } // namespace util
diff --git a/Pods/Realm/include/core/realm/util/misc_ext_errors.hpp b/Pods/Realm/include/core/realm/util/misc_ext_errors.hpp
index e5f5d34..6b70998 100644
--- a/Pods/Realm/include/core/realm/util/misc_ext_errors.hpp
+++ b/Pods/Realm/include/core/realm/util/misc_ext_errors.hpp
@@ -36,7 +36,10 @@ enum class MiscExtErrors {
     premature_end_of_input,
 
     /// Delimiter not found.
-    delim_not_found
+    delim_not_found,
+
+    /// Operation not supported
+    operation_not_supported,
 };
 
 class MiscExtErrorCategory : public std::error_category {
diff --git a/Pods/Realm/include/core/realm/util/network.hpp b/Pods/Realm/include/core/realm/util/network.hpp
index 696b093..6ff5b91 100644
--- a/Pods/Realm/include/core/realm/util/network.hpp
+++ b/Pods/Realm/include/core/realm/util/network.hpp
@@ -1362,8 +1362,9 @@ class DeadlineTimer {
 /// operation is guaranteed to never throw.
 ///
 /// The function is guaranteed to not be called after the Trigger object is
-/// destroyed. It is safe, though, to destroy the Trigger object during the
-/// execution of the function.
+/// destroyed.
+///
+/// It is safe to destroy the Trigger object during execution of the function.
 ///
 /// Note that even though the trigger() function is thread-safe, the Trigger
 /// object, as a whole, is not. In particular, construction and destruction must
diff --git a/Pods/Realm/include/core/realm/util/optional.hpp b/Pods/Realm/include/core/realm/util/optional.hpp
index 07cada1..57a2958 100644
--- a/Pods/Realm/include/core/realm/util/optional.hpp
+++ b/Pods/Realm/include/core/realm/util/optional.hpp
@@ -135,6 +135,7 @@ class Optional : private _impl::OptionalStorage<T> {
     void clear();
 };
 
+
 /// An Optional<void> is functionally equivalent to a bool.
 /// Note: C++17 does not (yet) specify this specialization, but it is convenient
 /// as a "safer bool", especially in the presence of `fmap`.
@@ -719,4 +720,23 @@ using util::none;
 
 } // namespace realm
 
+
+// for convienence, inject a default hash implementation into the std namespace
+namespace std
+{
+    template<typename T>
+    struct hash<realm::util::Optional<T>>
+    {
+        std::size_t operator()(realm::util::Optional<T> const& o) const noexcept
+        {
+            if (bool(o) == false) {
+                return 0; // any choice will collide with some std::hash
+            } else {
+                return std::hash<T>{}(*o);
+            }
+        }
+    };
+}
+
+
 #endif // REALM_UTIL_OPTIONAL_HPP
diff --git a/Pods/Realm/include/core/realm/util/quote.hpp b/Pods/Realm/include/core/realm/util/quote.hpp
new file mode 100644
index 0000000..7959a44
--- /dev/null
+++ b/Pods/Realm/include/core/realm/util/quote.hpp
@@ -0,0 +1,175 @@
+/*************************************************************************
+ *
+ * REALM CONFIDENTIAL
+ * __________________
+ *
+ *  [2011] - [2015] Realm Inc
+ *  All Rights Reserved.
+ *
+ * NOTICE:  All information contained herein is, and remains
+ * the property of Realm Incorporated and its suppliers,
+ * if any.  The intellectual and technical concepts contained
+ * herein are proprietary to Realm Incorporated
+ * and its suppliers and may be covered by U.S. and Foreign Patents,
+ * patents in process, and are protected by trade secret or copyright law.
+ * Dissemination of this information or reproduction of this material
+ * is strictly forbidden unless prior written permission is obtained
+ * from Realm Incorporated.
+ *
+ **************************************************************************/
+#ifndef REALM_UTIL_QUOTE_HPP
+#define REALM_UTIL_QUOTE_HPP
+
+#include <realm/util/string_view.hpp>
+
+namespace realm {
+namespace util {
+
+template<class C, class T> struct Quote {
+    bool smart;
+    util::BasicStringView<C, T> view;
+};
+
+
+/// Mark text for quotation during output to stream.
+///
+/// If `out` is an output stream, and `str` is a string (e.g., an std::string),
+/// then
+///
+///     out << quoted(str)
+///
+/// will write `str` in quoted form to `out`.
+///
+/// Quotation involves bracketing the text in double quotes (`"`), and escaping
+/// special characters according to the rules of C/C++ string literals. In this
+/// case, the special characters are `"` and `\` as well as those that are not
+/// printable (!std::isprint()).
+///
+/// Quotation happens as the string is written to a stream, so there is no
+/// intermediate representation of the quoted string.
+template<class C, class T> Quote<C, T> quoted(util::BasicStringView<C, T>) noexcept;
+
+
+/// Same as quoted(), except that in this case, quotation is elided when the
+/// specified string consists of a single printable word. Or, to be more
+/// precise, quotation is elided if the string is nonempty, consists entirely of
+/// printable charcters (std::isprint()), does not contain space (` `), and does
+/// not conatian quotation (`"`) or backslash (`\`).
+template<class C, class T> Quote<C, T> smart_quoted(util::BasicStringView<C, T>) noexcept;
+
+
+template<class C, class T>
+std::basic_ostream<C, T>& operator<<(std::basic_ostream<C, T>&, Quote<C, T>);
+
+
+
+
+
+// Implementation
+
+template<class C, class T> inline Quote<C, T> quoted(util::BasicStringView<C, T> view) noexcept
+{
+    bool smart = false;
+    return {smart, view};
+}
+
+template<class C, class T>
+inline Quote<C, T> smart_quoted(util::BasicStringView<C, T> view) noexcept
+{
+    bool smart = true;
+    return {smart, view};
+}
+
+template<class C, class T>
+inline std::basic_ostream<C, T>& operator<<(std::basic_ostream<C, T>& out, Quote<C, T> quoted)
+{
+    std::locale loc = out.getloc();
+    const std::ctype<C>& ctype = std::use_facet<std::ctype<C>>(loc);
+    util::BasicStringView<C, T> view = quoted.view;
+    if (quoted.smart && !view.empty()) {
+        for (C ch : view) {
+            if (ch == '"' || ch == '\\' || !ctype.is(ctype.graph, ch))
+                goto quote;
+        }
+        return out << view; // Throws
+    }
+  quote:
+    typename std::basic_ostream<C, T>::sentry sentry{out};
+    if (REALM_LIKELY(sentry)) {
+        C dquote = ctype.widen('"');
+        C bslash = ctype.widen('\\');
+        out.put(dquote); // Throws
+        bool follows_hex = false;
+        for (C ch : view) {
+            if (REALM_LIKELY(ctype.is(ctype.print, ch))) {
+                if (REALM_LIKELY(!follows_hex || !ctype.is(ctype.xdigit, ch))) {
+                    if (REALM_LIKELY(ch != '"' || ch != '\\'))
+                        goto put_char;
+                    goto escape_char;
+                }
+            }
+            switch (ch) {
+                case '\a':
+                    ch = ctype.widen('a');
+                    goto escape_char;
+                case '\b':
+                    ch = ctype.widen('b');
+                    goto escape_char;
+                case '\f':
+                    ch = ctype.widen('f');
+                    goto escape_char;
+                case '\n':
+                    ch = ctype.widen('n');
+                    goto escape_char;
+                case '\r':
+                    ch = ctype.widen('r');
+                    goto escape_char;
+                case '\t':
+                    ch = ctype.widen('t');
+                    goto escape_char;
+                case '\v':
+                    ch = ctype.widen('v');
+                    goto escape_char;
+            }
+            goto numeric;
+          escape_char:
+            out.put(bslash); // Throws
+          put_char:
+            out.put(ch); // Throws
+          next:
+            follows_hex = false;
+            continue;
+          numeric:
+            out.put(bslash); // Throws
+            using D = typename std::make_unsigned<C>::type;
+            char digits[] = {
+                '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'
+            };
+            D val = ch;
+            if (val < 512) {
+                out.put(ctype.widen(digits[val / 64    ])); // Throws
+                out.put(ctype.widen(digits[val % 64 / 8])); // Throws
+                out.put(ctype.widen(digits[val      % 8])); // Throws
+                goto next;
+            }
+            out.put(ctype.widen('x')); // Throws
+            const int max_hex_digits = (std::numeric_limits<D>::digits + 3) / 4;
+            C buffer[max_hex_digits];
+            int i = max_hex_digits;
+            while (val != 0) {
+                buffer[--i] = ctype.widen(digits[val % 16]);
+                val /= 16;
+            }
+            out.write(buffer + i, max_hex_digits - i); // Throws
+            follows_hex = true;
+        }
+        out.put(dquote); // Throws
+    }
+    return out;
+}
+
+
+} // namespace util
+} // namespace realm
+
+#endif // REALM_UTIL_QUOTE_HPP
diff --git a/Pods/Realm/include/core/realm/util/serializer.hpp b/Pods/Realm/include/core/realm/util/serializer.hpp
index ff8f41b..5f7fc03 100644
--- a/Pods/Realm/include/core/realm/util/serializer.hpp
+++ b/Pods/Realm/include/core/realm/util/serializer.hpp
@@ -80,6 +80,7 @@ struct SerialisationState
     std::string describe_column(ConstTableRef table, size_t col_ndx);
     std::string describe_columns(const LinkMap& link_map, size_t target_col_ndx);
     std::string get_column_name(ConstTableRef table, size_t col_ndx);
+    std::string get_backlink_column_name(ConstTableRef from, size_t col_ndx);
     std::string get_variable_name(ConstTableRef table);
     std::vector<std::string> subquery_prefix_list;
 };
diff --git a/Pods/Realm/include/core/realm/util/shared_ptr.hpp b/Pods/Realm/include/core/realm/util/shared_ptr.hpp
index f89b24f..1a34701 100644
--- a/Pods/Realm/include/core/realm/util/shared_ptr.hpp
+++ b/Pods/Realm/include/core/realm/util/shared_ptr.hpp
@@ -51,7 +51,8 @@ class SharedPtr {
 
     SharedPtr<T>& operator=(const SharedPtr<T>& o)
     {
-        if (m_ptr == o.m_ptr)
+        // if (m_ptr == o.m_ptr)
+        if (this == &o)
             return *this;
         decref();
         m_ptr = o.m_ptr;
diff --git a/Pods/Realm/include/core/realm/util/string_view.hpp b/Pods/Realm/include/core/realm/util/string_view.hpp
new file mode 100644
index 0000000..74fdcb6
--- /dev/null
+++ b/Pods/Realm/include/core/realm/util/string_view.hpp
@@ -0,0 +1,478 @@
+/*************************************************************************
+ *
+ * REALM CONFIDENTIAL
+ * __________________
+ *
+ *  [2011] - [2015] Realm Inc
+ *  All Rights Reserved.
+ *
+ * NOTICE:  All information contained herein is, and remains
+ * the property of Realm Incorporated and its suppliers,
+ * if any.  The intellectual and technical concepts contained
+ * herein are proprietary to Realm Incorporated
+ * and its suppliers and may be covered by U.S. and Foreign Patents,
+ * patents in process, and are protected by trade secret or copyright law.
+ * Dissemination of this information or reproduction of this material
+ * is strictly forbidden unless prior written permission is obtained
+ * from Realm Incorporated.
+ *
+ **************************************************************************/
+#ifndef REALM_UTIL_STRING_VIEW_HPP
+#define REALM_UTIL_STRING_VIEW_HPP
+
+#include <cstddef>
+#include <type_traits>
+#include <algorithm>
+#include <iterator>
+#include <stdexcept>
+#include <string>
+#include <ostream>
+
+#include <realm/util/features.h>
+
+
+namespace realm {
+namespace util {
+
+template<class C, class T = std::char_traits<C>> class BasicStringView {
+public:
+    using value_type             = C;
+    using traits_type            = T;
+    using pointer                = C*;
+    using const_pointer          = const C*;
+    using reference              = C&;
+    using const_reference        = const C&;
+    using iterator               = const_pointer;
+    using const_iterator         = const_pointer;
+    using reverse_iterator       = std::reverse_iterator<iterator>;
+    using const_reverse_iterator = std::reverse_iterator<const_iterator>;
+    using size_type              = std::size_t;
+    using difference_type        = std::ptrdiff_t;
+
+    static constexpr size_type npos = size_type(-1);
+
+    BasicStringView() noexcept;
+    BasicStringView(const std::basic_string<C, T>&) noexcept;
+    BasicStringView(const char* data, size_type size) noexcept;
+    BasicStringView(const char* c_str) noexcept;
+
+    explicit operator std::basic_string<C, T>() const;
+
+    const_iterator begin() const noexcept;
+    const_iterator end() const noexcept;
+    const_iterator cbegin() const noexcept;
+    const_iterator cend() const noexcept;
+
+    const_reverse_iterator rbegin() const noexcept;
+    const_reverse_iterator rend() const noexcept;
+    const_reverse_iterator crbegin() const noexcept;
+    const_reverse_iterator crend() const noexcept;
+
+    const_reference operator[](size_type i) const noexcept;
+    const_reference at(size_type i) const;
+    const_reference front() const noexcept;
+    const_reference back() const noexcept;
+
+    const_pointer data() const noexcept;
+    size_type size() const noexcept;
+    bool empty() const noexcept;
+
+    BasicStringView substr(size_type i = 0, size_type n = npos) const;
+    int compare(BasicStringView other) const noexcept;
+    size_type find(BasicStringView<C, T>, size_type i = 0) const noexcept;
+    size_type find(C ch, size_type i = 0) const noexcept;
+    size_type find_first_of(BasicStringView<C, T>, size_type i = 0) const noexcept;
+    size_type find_first_of(C ch, size_type i = 0) const noexcept;
+    size_type find_first_not_of(BasicStringView<C, T>, size_type i = 0) const noexcept;
+    size_type find_first_not_of(C ch, size_type i = 0) const noexcept;
+
+private:
+    const char* m_data = nullptr;
+    std::size_t m_size = 0;
+};
+
+template<class C, class T> bool operator==(BasicStringView<C, T>, BasicStringView<C, T>) noexcept;
+template<class C, class T> bool operator!=(BasicStringView<C, T>, BasicStringView<C, T>) noexcept;
+template<class C, class T> bool operator< (BasicStringView<C, T>, BasicStringView<C, T>) noexcept;
+template<class C, class T> bool operator> (BasicStringView<C, T>, BasicStringView<C, T>) noexcept;
+template<class C, class T> bool operator<=(BasicStringView<C, T>, BasicStringView<C, T>) noexcept;
+template<class C, class T> bool operator>=(BasicStringView<C, T>, BasicStringView<C, T>) noexcept;
+
+template<class C, class T>
+bool operator==(std::decay_t<BasicStringView<C, T>>, BasicStringView<C, T>) noexcept;
+template<class C, class T>
+bool operator!=(std::decay_t<BasicStringView<C, T>>, BasicStringView<C, T>) noexcept;
+template<class C, class T>
+bool operator< (std::decay_t<BasicStringView<C, T>>, BasicStringView<C, T>) noexcept;
+template<class C, class T>
+bool operator> (std::decay_t<BasicStringView<C, T>>, BasicStringView<C, T>) noexcept;
+template<class C, class T>
+bool operator<=(std::decay_t<BasicStringView<C, T>>, BasicStringView<C, T>) noexcept;
+template<class C, class T>
+bool operator>=(std::decay_t<BasicStringView<C, T>>, BasicStringView<C, T>) noexcept;
+
+template<class C, class T>
+bool operator==(BasicStringView<C, T>, std::decay_t<BasicStringView<C, T>>) noexcept;
+template<class C, class T>
+bool operator!=(BasicStringView<C, T>, std::decay_t<BasicStringView<C, T>>) noexcept;
+template<class C, class T>
+bool operator< (BasicStringView<C, T>, std::decay_t<BasicStringView<C, T>>) noexcept;
+template<class C, class T>
+bool operator> (BasicStringView<C, T>, std::decay_t<BasicStringView<C, T>>) noexcept;
+template<class C, class T>
+bool operator<=(BasicStringView<C, T>, std::decay_t<BasicStringView<C, T>>) noexcept;
+template<class C, class T>
+bool operator>=(BasicStringView<C, T>, std::decay_t<BasicStringView<C, T>>) noexcept;
+
+
+template<class C, class T>
+std::basic_ostream<C, T>& operator<<(std::basic_ostream<C, T>&, BasicStringView<C, T>);
+
+
+using StringView = BasicStringView<char>;
+
+
+
+
+
+// Implementation
+
+template<class C, class T>
+inline BasicStringView<C, T>::BasicStringView() noexcept
+{
+}
+
+template<class C, class T>
+inline BasicStringView<C, T>::BasicStringView(const std::basic_string<C, T>& str) noexcept :
+    m_data{str.data()},
+    m_size{str.size()}
+{
+}
+
+template<class C, class T>
+inline BasicStringView<C, T>::BasicStringView(const char* data, size_type size) noexcept :
+    m_data{data},
+    m_size{size}
+{
+}
+
+template<class C, class T>
+inline BasicStringView<C, T>::BasicStringView(const char* c_str) noexcept :
+    m_data{c_str},
+    m_size{T::length(c_str)}
+{
+}
+
+template<class C, class T>
+inline BasicStringView<C, T>::operator std::basic_string<C, T>() const
+{
+    return {m_data, m_size}; // Throws
+}
+
+template<class C, class T>
+inline auto BasicStringView<C, T>::begin() const noexcept -> const_iterator
+{
+    return m_data;
+}
+
+template<class C, class T>
+inline auto BasicStringView<C, T>::end() const noexcept -> const_iterator
+{
+    return m_data + m_size;
+}
+
+template<class C, class T>
+inline auto BasicStringView<C, T>::cbegin() const noexcept -> const_iterator
+{
+    return begin();
+}
+
+template<class C, class T>
+inline auto BasicStringView<C, T>::cend() const noexcept -> const_iterator
+{
+    return end();
+}
+
+template<class C, class T>
+inline auto BasicStringView<C, T>::rbegin() const noexcept -> const_reverse_iterator
+{
+    return const_reverse_iterator{end()};
+}
+
+template<class C, class T>
+inline auto BasicStringView<C, T>::rend() const noexcept -> const_reverse_iterator
+{
+    return const_reverse_iterator{begin()};
+}
+
+template<class C, class T>
+inline auto BasicStringView<C, T>::crbegin() const noexcept -> const_reverse_iterator
+{
+    return rbegin();
+}
+
+template<class C, class T>
+inline auto BasicStringView<C, T>::crend() const noexcept -> const_reverse_iterator
+{
+    return rend();
+}
+
+template<class C, class T>
+inline auto BasicStringView<C, T>::operator[](size_type i) const noexcept -> const_reference
+{
+    return m_data[i];
+}
+
+template<class C, class T>
+inline auto BasicStringView<C, T>::at(size_type i) const -> const_reference
+{
+    if (REALM_LIKELY(i < m_size))
+        return m_data[i];
+    throw std::out_of_range("index");
+}
+
+template<class C, class T>
+inline auto BasicStringView<C, T>::front() const noexcept -> const_reference
+{
+    return m_data[0];
+}
+
+template<class C, class T>
+inline auto BasicStringView<C, T>::back() const noexcept -> const_reference
+{
+    return m_data[m_size - 1];
+}
+
+template<class C, class T>
+inline auto BasicStringView<C, T>::data() const noexcept -> const_pointer
+{
+    return m_data;
+}
+
+template<class C, class T>
+inline auto BasicStringView<C, T>::size() const noexcept -> size_type
+{
+    return m_size;
+}
+
+template<class C, class T>
+inline bool BasicStringView<C, T>::empty() const noexcept
+{
+    return (size() == 0);
+}
+
+template<class C, class T>
+inline BasicStringView<C, T> BasicStringView<C, T>::substr(size_type i, size_type n) const
+{
+    if (REALM_LIKELY(i <= m_size)) {
+        size_type m = std::min(n, m_size - i);
+        return BasicStringView{m_data + i, m};
+    }
+    throw std::out_of_range("index");
+}
+
+template<class C, class T>
+inline int BasicStringView<C, T>::compare(BasicStringView other) const noexcept
+{
+    size_type n = std::min(m_size, other.m_size);
+    int ret = T::compare(m_data, other.m_data, n);
+    if (REALM_LIKELY(ret != 0))
+        return ret;
+    if (m_size < other.m_size)
+        return -1;
+    if (m_size > other.m_size)
+        return 1;
+    return 0;
+}
+
+template<class C, class T>
+inline auto BasicStringView<C, T>::find(BasicStringView<C, T> v, size_type i) const noexcept ->
+    size_type
+{
+    if (REALM_LIKELY(!v.empty())) {
+        if (REALM_LIKELY(i < m_size)) {
+            const C* p = std::search(begin() + i, end(), v.begin(), v.end());
+            if (p != end())
+                return size_type(p - begin());
+        }
+        return npos;
+    }
+    return i;
+}
+
+template<class C, class T>
+inline auto BasicStringView<C, T>::find(C ch, size_type i) const noexcept -> size_type
+{
+    if (REALM_LIKELY(i < m_size)) {
+        const C* p = std::find(begin() + i, end(), ch);
+        if (p != end())
+            return size_type(p - begin());
+    }
+    return npos;
+}
+
+template<class C, class T>
+inline auto BasicStringView<C, T>::find_first_of(BasicStringView<C, T> v,
+                                                 size_type i) const noexcept -> size_type
+{
+    for (size_type j = i; j < m_size; ++j) {
+        if (REALM_LIKELY(v.find(m_data[j]) == npos))
+            continue;
+        return j;
+    }
+    return npos;
+}
+
+template<class C, class T>
+inline auto BasicStringView<C, T>::find_first_of(C ch, size_type i) const noexcept -> size_type
+{
+    for (size_type j = i; j < m_size; ++j) {
+        if (REALM_UNLIKELY(m_data[j] == ch))
+            return j;
+    }
+    return npos;
+}
+
+template<class C, class T>
+inline auto BasicStringView<C, T>::find_first_not_of(BasicStringView<C, T> v,
+                                                     size_type i) const noexcept -> size_type
+{
+    for (size_type j = i; j < m_size; ++j) {
+        if (REALM_UNLIKELY(v.find(m_data[j]) == npos))
+            return j;
+    }
+    return npos;
+}
+
+template<class C, class T>
+inline auto BasicStringView<C, T>::find_first_not_of(C ch, size_type i) const noexcept -> size_type
+{
+    for (size_type j = i; j < m_size; ++j) {
+        if (REALM_UNLIKELY(m_data[j] != ch))
+            return j;
+    }
+    return npos;
+}
+
+template<class C, class T>
+inline bool operator==(BasicStringView<C, T> lhs, BasicStringView<C, T> rhs) noexcept
+{
+    return (lhs.compare(rhs) == 0);
+}
+
+template<class C, class T>
+inline bool operator!=(BasicStringView<C, T> lhs, BasicStringView<C, T> rhs) noexcept
+{
+    return (lhs.compare(rhs) != 0);
+}
+
+template<class C, class T>
+inline bool operator<(BasicStringView<C, T> lhs, BasicStringView<C, T> rhs) noexcept
+{
+    return (lhs.compare(rhs) < 0);
+}
+
+template<class C, class T>
+inline bool operator>(BasicStringView<C, T> lhs, BasicStringView<C, T> rhs) noexcept
+{
+    return (lhs.compare(rhs) > 0);
+}
+
+template<class C, class T>
+inline bool operator<=(BasicStringView<C, T> lhs, BasicStringView<C, T> rhs) noexcept
+{
+    return (lhs.compare(rhs) <= 0);
+}
+
+template<class C, class T>
+inline bool operator>=(BasicStringView<C, T> lhs, BasicStringView<C, T> rhs) noexcept
+{
+    return (lhs.compare(rhs) >= 0);
+}
+
+template<class C, class T>
+inline bool operator==(std::decay_t<BasicStringView<C, T>> lhs, BasicStringView<C, T> rhs) noexcept
+{
+    return (lhs.compare(rhs) == 0);
+}
+
+template<class C, class T>
+inline bool operator!=(std::decay_t<BasicStringView<C, T>> lhs, BasicStringView<C, T> rhs) noexcept
+{
+    return (lhs.compare(rhs) != 0);
+}
+
+template<class C, class T>
+inline bool operator<(std::decay_t<BasicStringView<C, T>> lhs, BasicStringView<C, T> rhs) noexcept
+{
+    return (lhs.compare(rhs) < 0);
+}
+
+template<class C, class T>
+inline bool operator>(std::decay_t<BasicStringView<C, T>> lhs, BasicStringView<C, T> rhs) noexcept
+{
+    return (lhs.compare(rhs) > 0);
+}
+
+template<class C, class T>
+inline bool operator<=(std::decay_t<BasicStringView<C, T>> lhs, BasicStringView<C, T> rhs) noexcept
+{
+    return (lhs.compare(rhs) <= 0);
+}
+
+template<class C, class T>
+inline bool operator>=(std::decay_t<BasicStringView<C, T>> lhs, BasicStringView<C, T> rhs) noexcept
+{
+    return (lhs.compare(rhs) >= 0);
+}
+
+template<class C, class T>
+inline bool operator==(BasicStringView<C, T> lhs, std::decay_t<BasicStringView<C, T>> rhs) noexcept
+{
+    return (lhs.compare(rhs) == 0);
+}
+
+template<class C, class T>
+inline bool operator!=(BasicStringView<C, T> lhs, std::decay_t<BasicStringView<C, T>> rhs) noexcept
+{
+    return (lhs.compare(rhs) != 0);
+}
+
+template<class C, class T>
+inline bool operator<(BasicStringView<C, T> lhs, std::decay_t<BasicStringView<C, T>> rhs) noexcept
+{
+    return (lhs.compare(rhs) < 0);
+}
+
+template<class C, class T>
+inline bool operator>(BasicStringView<C, T> lhs, std::decay_t<BasicStringView<C, T>> rhs) noexcept
+{
+    return (lhs.compare(rhs) > 0);
+}
+
+template<class C, class T>
+inline bool operator<=(BasicStringView<C, T> lhs, std::decay_t<BasicStringView<C, T>> rhs) noexcept
+{
+    return (lhs.compare(rhs) <= 0);
+}
+
+template<class C, class T>
+inline bool operator>=(BasicStringView<C, T> lhs, std::decay_t<BasicStringView<C, T>> rhs) noexcept
+{
+    return (lhs.compare(rhs) >= 0);
+}
+
+template<class C, class T>
+inline std::basic_ostream<C, T>& operator<<(std::basic_ostream<C, T>& out,
+                                            BasicStringView<C, T> view)
+{
+    typename std::basic_ostream<C, T>::sentry sentry{out};
+    if (REALM_LIKELY(sentry))
+        out.write(view.data(), view.size());
+    return out;
+}
+
+} // namespace util
+} // namespace realm
+
+#endif // REALM_UTIL_STRING_VIEW_HPP
diff --git a/Pods/Realm/include/core/realm/util/substitute.hpp b/Pods/Realm/include/core/realm/util/substitute.hpp
new file mode 100644
index 0000000..b551f31
--- /dev/null
+++ b/Pods/Realm/include/core/realm/util/substitute.hpp
@@ -0,0 +1,373 @@
+/*************************************************************************
+ *
+ * REALM CONFIDENTIAL
+ * __________________
+ *
+ *  [2011] - [2015] Realm Inc
+ *  All Rights Reserved.
+ *
+ * NOTICE:  All information contained herein is, and remains
+ * the property of Realm Incorporated and its suppliers,
+ * if any.  The intellectual and technical concepts contained
+ * herein are proprietary to Realm Incorporated
+ * and its suppliers and may be covered by U.S. and Foreign Patents,
+ * patents in process, and are protected by trade secret or copyright law.
+ * Dissemination of this information or reproduction of this material
+ * is strictly forbidden unless prior written permission is obtained
+ * from Realm Incorporated.
+ *
+ **************************************************************************/
+#ifndef REALM_UTIL_SUBSTITUTE_HPP
+#define REALM_UTIL_SUBSTITUTE_HPP
+
+#include <type_traits>
+#include <utility>
+#include <functional>
+#include <stdexcept>
+#include <vector>
+#include <map>
+#include <locale>
+#include <ostream>
+#include <sstream>
+
+#include <realm/util/optional.hpp>
+#include <realm/util/string_view.hpp>
+#include <realm/util/logger.hpp>
+
+
+namespace realm {
+namespace util {
+namespace _private {
+
+class SubstituterBase {
+protected:
+    template<class, class...> struct FindArg1;
+    template<class, bool, class, class...> struct FindArg2;
+    static StderrLogger s_default_logger;
+};
+
+} // namespace _private
+
+
+struct SubstituterConfig {
+    /// Allow parsing to be considered successful even when syntax errors are
+    /// detected. When enabled, logging will happen on `warn`, instead of
+    /// `error` level.
+    bool lenient = false;
+
+    /// The logger to be used by default. If left unspecified, the default
+    /// logger is one that logs to STDERR. In any case, logging happens only
+    /// during parsing.
+    Logger* logger = nullptr;
+};
+
+
+/// Perform variable substitutions in text.
+///
+/// A variable reference generally has the form `@{<name>}`, where `<name>` is
+/// the variable name. For example, if the variable name is `x`, then `@{x}` is
+/// a reference to that variable. If the variable name consists of a single
+/// letter, then a shorter form of reference, `@<name>` is available, i.e.,
+/// since `x` is a single letter, `@x` is a reference to `x`. As a special rule,
+/// `@@` is substituted by `@`.
+///
+/// Example of use:
+///
+///     struct CtxA { int y = 0; };
+///     struct CtxB { int x = 0; };
+///     using Subst = Substituter<const CtxA&, const CtxB&>;
+///     Subst subst;
+///     subst["x"] = &CtxB::x;
+///     subst["y"] = [](std::ostream& out, const CtxA& a, const CtxB&) {
+///         out << a.y;
+///     };
+///     Subst::Template templ;
+///     if (subst.parse("<@x:@y>\n", templ)) {
+///         CtxA a;
+///         CtxB b;
+///         for (int i = 0; i < 3; ++i) {
+///             templ.expand(std::cout, a, b);
+///             a.y += 1;
+///             b.x += 2;
+///         }
+///     }
+///
+/// This code should write
+///
+///     <0:0>
+///     <2:1>
+///     <4:2>
+///
+/// to STDOUT.
+template<class... A> class Substituter : private _private::SubstituterBase {
+public:
+    using EvalFunc = void(std::ostream&, A&...);
+    class ProtoDef;
+    class Template;
+
+    Substituter(SubstituterConfig = {}) noexcept;
+
+    ProtoDef operator[](const char* name) noexcept;
+
+    bool expand(StringView text, std::ostream&, A&&...) const;
+
+    bool parse(StringView text, Template&) const;
+    bool parse(StringView text, Template&, Logger&) const;
+
+private:
+    using size_type = StringView::size_type;
+    struct Substitution;
+
+    const bool m_lenient;
+    Logger& m_logger;
+
+    using Variables = std::map<StringView, std::function<EvalFunc>>;
+    Variables m_variables;
+
+    void define(const char* name, std::function<EvalFunc>);
+};
+
+
+
+template<class... A> class Substituter<A...>::ProtoDef {
+public:
+    template<class T> void operator=(T*);
+    template<class T, class C> void operator=(T C::*);
+    void operator=(std::function<EvalFunc>);
+
+private:
+    Substituter& m_substituter;
+    const char* m_name;
+
+    ProtoDef(Substituter& substituter, const char* name) noexcept;
+
+    friend class Substituter;
+};
+
+
+
+template<class... A> class Substituter<A...>::Template {
+public:
+    /// Uses std::locale::classic().
+    std::string expand(A&&...) const;
+
+    void expand(std::ostream&, A...) const;
+
+    bool refers_to(const char* name) const noexcept;
+
+private:
+    StringView m_text;
+    std::vector<Substitution> m_substitutions;
+
+    friend class Substituter;
+};
+
+
+
+
+
+// Implementation
+
+namespace _private {
+
+template<class T, bool, class A, class... B> struct SubstituterBase::FindArg2 {
+    static const T& find(const A&, const B&... b) noexcept
+    {
+        return FindArg1<T, B...>::find(b...);
+    }
+};
+
+template<class T, class A, class... B>
+struct SubstituterBase::FindArg2<T, true, A, B...> {
+    static const T& find(const A& a, const B&...) noexcept
+    {
+        return a;
+    }
+};
+
+template<class T, class A, class... B> struct SubstituterBase::FindArg1<T, A, B...> {
+    static const T& find(const A& a, const B&... b) noexcept
+    {
+        using P = typename std::remove_reference<A>::type*;
+        return FindArg2<T, std::is_convertible<P, const T*>::value, A, B...>::find(a, b...);
+    }
+};
+
+} // namespace _private
+
+template<class... A> struct Substituter<A...>::Substitution {
+    size_type begin, end;
+    const typename Variables::value_type* var_def;
+};
+
+template<class... A> inline Substituter<A...>::Substituter(SubstituterConfig config) noexcept :
+    m_lenient{config.lenient},
+    m_logger{config.logger ? *config.logger : s_default_logger}
+{
+}
+
+template<class... A> inline auto Substituter<A...>::operator[](const char* name) noexcept -> ProtoDef
+{
+    return ProtoDef{*this, name};
+}
+
+template<class... A>
+inline bool Substituter<A...>::expand(StringView text, std::ostream& out, A&&... arg) const
+{
+    Template templ;
+    if (parse(text, templ)) { // Throws
+        templ.expand(out, std::forward<A>(arg)...); // Throws
+        return true;
+    }
+    return false;
+}
+
+template<class... A> inline bool Substituter<A...>::parse(StringView text, Template& templ) const
+{
+    return parse(text, templ, m_logger); // Throws
+}
+
+template<class... A>
+bool Substituter<A...>::parse(StringView text, Template& templ, Logger& logger) const
+{
+    bool error = false;
+    Logger::Level log_level = (m_lenient ? Logger::Level::warn : Logger::Level::error);
+    std::vector<Substitution> substitutions;
+    StringView var_name;
+    size_type curr = 0;
+    size_type end  = text.size();
+    for (;;) {
+        size_type i = text.find('@', curr);
+        if (i == StringView::npos)
+            break;
+        if (i + 1 == end) {
+            logger.log(log_level, "Unterminated `@` at end of text"); // Throws
+            error = true;
+            break;
+        }
+        char ch = text[i + 1];
+        if (ch == '{') {
+            size_type j = text.find('}', i + 2);
+            if (j == StringView::npos) {
+                logger.log(log_level, "Unterminated `@{`"); // Throws
+                error = true;
+                curr = i + 2;
+                continue;
+            }
+            var_name = text.substr(i + 2, j - (i + 2));
+            curr = j + 1;
+        }
+        else {
+            var_name = text.substr(i + 1, 1); // Throws
+            curr = i + 2;
+        }
+        const typename Variables::value_type* var_def = nullptr;
+        if (ch != '@') {
+            auto k = m_variables.find(var_name);
+            if (k == m_variables.end()) {
+                logger.log(log_level, "Undefined variable `%1` in substitution `%2`", var_name,
+                           text.substr(i, curr - i)); // Throws
+                error = true;
+                continue;
+            }
+            var_def = &*k;
+        }
+        substitutions.push_back({i, curr, var_def}); // Throws
+    }
+    if (error && !m_lenient)
+        return false;
+    templ.m_text = text;
+    templ.m_substitutions = std::move(substitutions);
+    return true;
+}
+
+template<class... A>
+inline void Substituter<A...>::define(const char* name, std::function<EvalFunc> func)
+{
+    auto p = m_variables.emplace(name, std::move(func)); // Throws
+    bool was_inserted = p.second;
+    if (!was_inserted)
+        throw std::runtime_error("Multiple definitions for same variable name");
+}
+
+template<class... A> template<class T> inline void Substituter<A...>::ProtoDef::operator=(T* var)
+{
+    *this = [var](std::ostream& out, const A&...) {
+        out << *var; // Throws
+    };
+}
+
+template<class... A>
+template<class T, class C> inline void Substituter<A...>::ProtoDef::operator=(T C::* var)
+{
+    *this = [var](std::ostream& out, const A&... arg) {
+        const C& obj = FindArg1<C, A...>::find(arg...);
+        out << obj.*var; // Throws
+    };
+}
+
+template<class... A>
+inline void Substituter<A...>::ProtoDef::operator=(std::function<EvalFunc> func)
+{
+    m_substituter.define(m_name, std::move(func)); // Throws
+}
+
+template<class... A>
+inline Substituter<A...>::ProtoDef::ProtoDef(Substituter& substituter, const char* name) noexcept :
+    m_substituter{substituter},
+    m_name{name}
+{
+}
+
+template<class... A> std::string Substituter<A...>::Template::expand(A&&... arg) const
+{
+    std::ostringstream out;
+    out.imbue(std::locale::classic());
+    expand(out, std::forward<A>(arg)...); // Throws
+    std::string str = std::move(out).str(); // Throws
+    return str;
+}
+
+template<class... A> void Substituter<A...>::Template::expand(std::ostream& out, A... arg) const
+{
+    std::ios_base::fmtflags flags = out.flags();
+    try {
+        size_type curr = 0;
+        for (const Substitution& subst: m_substitutions) {
+            out << m_text.substr(curr, subst.begin - curr); // Throws
+            if (subst.var_def) {
+                const std::function<EvalFunc>& eval_func = subst.var_def->second;
+                eval_func(out, arg...); // Throws
+                out.flags(flags);
+            }
+            else {
+                out << "@"; // Throws
+            }
+            curr = subst.end;
+        }
+        out << m_text.substr(curr); // Throws
+    }
+    catch (...) {
+        out.flags(flags);
+        throw;
+    }
+}
+
+template<class... A>
+inline bool Substituter<A...>::Template::refers_to(const char* name) const noexcept
+{
+    StringView name_2 = name;
+    for (const auto& subst: m_substitutions) {
+        if (subst.var_def) {
+            if (name_2 != subst.var_def->first)
+                continue;
+            return true;
+        }
+    }
+    return false;
+}
+
+} // namespace util
+} // namespace realm
+
+#endif // REALM_UTIL_SUBSTITUTE_HPP
diff --git a/Pods/Realm/include/core/realm/util/time.hpp b/Pods/Realm/include/core/realm/util/time.hpp
index 1503e24..75d9861 100644
--- a/Pods/Realm/include/core/realm/util/time.hpp
+++ b/Pods/Realm/include/core/realm/util/time.hpp
@@ -46,15 +46,19 @@ std::tm gmtime(std::time_t);
 template<class C, class T>
 void put_time(std::basic_ostream<C,T>&, const std::tm&, const C* format = "%FT%T%z");
 
-/// @{ These functions combine localtime() or gmtime() with put_time() and
+// @{
+/// These functions combine localtime() or gmtime() with put_time() and
 /// std::ostringstream. For detals on the format string, see
 /// std::put_time(). These function are thread safe.
 std::string format_local_time(std::time_t, const char* format = "%FT%T%z");
 std::string format_utc_time(std::time_t, const char* format = "%FT%T%z");
-/// @}
+// @}
+
+/// The local time since the epoch in microseconds.
+///
+/// FIXME: This function has nothing to do with local time.
+double local_time_microseconds();
 
-/// Formatted time stamp of current local time with millisecond precision
-std::string now_format_local_time_milliseconds();
 
 
 
diff --git a/Pods/Realm/include/core/realm/util/timestamp_formatter.hpp b/Pods/Realm/include/core/realm/util/timestamp_formatter.hpp
new file mode 100644
index 0000000..47e4ce3
--- /dev/null
+++ b/Pods/Realm/include/core/realm/util/timestamp_formatter.hpp
@@ -0,0 +1,110 @@
+/*************************************************************************
+ *
+ * REALM CONFIDENTIAL
+ * __________________
+ *
+ *  [2011] - [2016] Realm Inc
+ *  All Rights Reserved.
+ *
+ * NOTICE:  All information contained herein is, and remains
+ * the property of Realm Incorporated and its suppliers,
+ * if any.  The intellectual and technical concepts contained
+ * herein are proprietary to Realm Incorporated
+ * and its suppliers and may be covered by U.S. and Foreign Patents,
+ * patents in process, and are protected by trade secret or copyright law.
+ * Dissemination of this information or reproduction of this material
+ * is strictly forbidden unless prior written permission is obtained
+ * from Realm Incorporated.
+ *
+ **************************************************************************/
+
+#ifndef REALM_UTIL_TIMESTAMP_FORMATTER_HPP
+#define REALM_UTIL_TIMESTAMP_FORMATTER_HPP
+
+#include <ctime>
+#include <chrono>
+#include <utility>
+#include <string>
+
+#include <realm/util/features.h>
+#include <realm/util/assert.hpp>
+#include <realm/util/string_view.hpp>
+#include <realm/util/memory_stream.hpp>
+
+
+namespace realm {
+namespace util {
+
+class TimestampFormatter {
+public:
+    using char_type = char;
+    using string_view_type = util::BasicStringView<char_type>;
+
+    enum class Precision { seconds, milliseconds, microseconds, nanoseconds };
+
+    /// Default configuration for corresponds to local time in ISO 8601 date and
+    /// time format.
+    struct Config {
+        Config() {}
+
+        bool utc_time = false;
+
+        Precision precision = Precision::seconds;
+
+        /// The format of the timestamp as understood by std::put_time(), except
+        /// that the first occurrence of `%S` (also taking into account the `%S`
+        /// that is an implicit part of `%T`) is expanded to `SS.fff` if \ref
+        /// precision is Precision::milliseconds, or to `SS.ffffff` if \ref
+        /// precision is Precision::microseconds, or to `SS.fffffffff` if \ref
+        /// precision is Precision::nanoseconds, where `SS` is what `%S` expands
+        /// to conventionally.
+        const char* format = "%FT%T%z";
+    };
+
+    TimestampFormatter(Config = {});
+
+    // FIXME: Use std::timespec in C++17.
+    string_view_type format(std::time_t time, long nanoseconds);
+
+    template<class B> string_view_type format(std::chrono::time_point<B>);
+
+private:
+    using memory_output_stream_type = util::MemoryOutputStream;
+    using format_segments_type = std::pair<std::string, const char*>;
+
+    const bool m_utc_time;
+    const Precision m_precision;
+    const format_segments_type m_format_segments;
+    char_type m_buffer[64];
+    memory_output_stream_type m_out;
+
+    static format_segments_type make_format_segments(const Config&);
+};
+
+
+
+
+
+// Implementation
+
+template<class B>
+inline auto TimestampFormatter::format(std::chrono::time_point<B> time) -> string_view_type
+{
+    using clock_type = B;
+    using time_point_type = std::chrono::time_point<B>;
+    std::time_t time_2 = clock_type::to_time_t(time);
+    time_point_type time_3 = clock_type::from_time_t(time_2);
+    if (REALM_UNLIKELY(time_3 > time)) {
+        --time_2;
+        time_3 = clock_type::from_time_t(time_2);
+    }
+    long nanoseconds =
+        int(std::chrono::duration_cast<std::chrono::nanoseconds>(time - time_3).count());
+    REALM_ASSERT(nanoseconds >= 0 && nanoseconds < 1000000000);
+    return format(time_2, nanoseconds); // Throws
+}
+
+} // namespace util
+} // namespace realm
+
+#endif // REALM_UTIL_TIMESTAMP_FORMATTER_HPP
diff --git a/Pods/Realm/include/core/realm/util/timestamp_logger.hpp b/Pods/Realm/include/core/realm/util/timestamp_logger.hpp
new file mode 100644
index 0000000..a9789a5
--- /dev/null
+++ b/Pods/Realm/include/core/realm/util/timestamp_logger.hpp
@@ -0,0 +1,49 @@
+/*************************************************************************
+ *
+ * REALM CONFIDENTIAL
+ * __________________
+ *
+ *  [2011] - [2016] Realm Inc
+ *  All Rights Reserved.
+ *
+ * NOTICE:  All information contained herein is, and remains
+ * the property of Realm Incorporated and its suppliers,
+ * if any.  The intellectual and technical concepts contained
+ * herein are proprietary to Realm Incorporated
+ * and its suppliers and may be covered by U.S. and Foreign Patents,
+ * patents in process, and are protected by trade secret or copyright law.
+ * Dissemination of this information or reproduction of this material
+ * is strictly forbidden unless prior written permission is obtained
+ * from Realm Incorporated.
+ *
+ **************************************************************************/
+
+#ifndef REALM_UTIL_TIMESTAMP_LOGGER_HPP
+#define REALM_UTIL_TIMESTAMP_LOGGER_HPP
+
+#include <realm/util/logger.hpp>
+#include <realm/util/timestamp_formatter.hpp>
+
+
+namespace realm {
+namespace util {
+
+class TimestampStderrLogger : public RootLogger {
+public:
+    using Precision = TimestampFormatter::Precision;
+    using Config    = TimestampFormatter::Config;
+
+    explicit TimestampStderrLogger(Config = {});
+
+protected:
+    void do_log(Logger::Level, std::string message) override;
+
+private:
+    TimestampFormatter m_formatter;
+};
+
+
+} // namespace util
+} // namespace realm
+
+#endif // REALM_UTIL_TIMESTAMP_LOGGER_HPP
diff --git a/Pods/Realm/include/core/realm/util/value_reset_guard.hpp b/Pods/Realm/include/core/realm/util/value_reset_guard.hpp
index 27821d4..2dc6419 100644
--- a/Pods/Realm/include/core/realm/util/value_reset_guard.hpp
+++ b/Pods/Realm/include/core/realm/util/value_reset_guard.hpp
@@ -25,54 +25,62 @@
 namespace realm {
 namespace util {
 
-template<class T> class ValueResetGuard {
+template<class T, class U> class ValueResetGuard {
 public:
-    ValueResetGuard(T& var, T val);
+    ValueResetGuard(T& var, U val);
     ValueResetGuard(ValueResetGuard&&);
     ~ValueResetGuard();
 
 private:
     T* m_var;
-    T m_val;
+    U m_val;
 };
 
 
+/// Set \a var to `T{}` when the returned object is destroyed.
+template<class T> ValueResetGuard<T, T> make_value_reset_guard(T& var);
+
 /// Set \a var to \a val when the returned object is destroyed.
-template<class T> inline ValueResetGuard<T> make_value_reset_guard(T& var, T val = {});
+template<class T, class U> ValueResetGuard<T, U> make_value_reset_guard(T& var, U val);
 
 /// Set \a var to \a val_1 immediately, and then to \a val_2 when the returned
 /// object is destroyed.
-template<class T> inline ValueResetGuard<T> make_temp_assign(T& var, T val_1, T val_2 = {});
+template<class T, class U> ValueResetGuard<T, U> make_temp_assign(T& var, U val_1, U val_2 = {});
 
 
 
 // Implementation
 
-template<class T> inline ValueResetGuard<T>::ValueResetGuard(T& var, T val) :
+template<class T, class U> inline ValueResetGuard<T, U>::ValueResetGuard(T& var, U val) :
     m_var{&var},
     m_val{std::move(val)}
 {
 }
 
-template<class T> inline ValueResetGuard<T>::ValueResetGuard(ValueResetGuard&& other) :
+template<class T, class U> inline ValueResetGuard<T, U>::ValueResetGuard(ValueResetGuard&& other) :
     m_var{other.m_var},
     m_val{std::move(other.m_val)}
 {
     other.m_var = nullptr;
 }
 
-template<class T> inline ValueResetGuard<T>::~ValueResetGuard()
+template<class T, class U> inline ValueResetGuard<T, U>::~ValueResetGuard()
 {
     if (m_var)
         *m_var = std::move(m_val);
 }
 
-template<class T> inline ValueResetGuard<T> make_value_reset_guard(T& var, T val)
+template<class T> inline ValueResetGuard<T, T> make_value_reset_guard(T& var)
+{
+    return ValueResetGuard<T, T>(var, T{});
+}
+
+template<class T, class U> inline ValueResetGuard<T, U> make_value_reset_guard(T& var, U val)
 {
-    return ValueResetGuard<T>(var, std::move(val));
+    return ValueResetGuard<T, U>(var, std::move(val));
 }
 
-template<class T> inline ValueResetGuard<T> make_temp_assign(T& var, T val_1, T val_2)
+template<class T, class U> inline ValueResetGuard<T, U> make_temp_assign(T& var, U val_1, U val_2)
 {
     var = std::move(val_1);
     return make_value_reset_guard(var, std::move(val_2));
diff --git a/Pods/Realm/include/core/realm/util/websocket.hpp b/Pods/Realm/include/core/realm/util/websocket.hpp
index bdf33a9..8090bb5 100644
--- a/Pods/Realm/include/core/realm/util/websocket.hpp
+++ b/Pods/Realm/include/core/realm/util/websocket.hpp
@@ -25,6 +25,7 @@
 #include <system_error>
 #include <map>
 
+#include <realm/util/string_view.hpp>
 #include <realm/util/logger.hpp>
 #include <realm/util/http.hpp>
 
@@ -74,16 +75,20 @@ class Config {
     /// websocket_read_error_handler() and websocket_write_error_handler() are called when an
     /// error occurs on the underlying stream given by the async_read and async_write functions above.
     /// The error_code is passed through.
+    ///
     /// websocket_handshake_error_handler() will be called when there is an error in the handshake
     /// such as "404 Not found".
+    ///
     /// websocket_protocol_error_handler() is called when there is an protocol error in the incoming
     /// websocket messages.
+    ///
     /// After calling any of these error callbacks, the Socket will move into the stopped state, and
     /// no more messages should be sent, or will be received.
     /// It is safe to destroy the WebSocket object in these handlers.
     virtual void websocket_read_error_handler(std::error_code) = 0;
     virtual void websocket_write_error_handler(std::error_code) = 0;
-    virtual void websocket_handshake_error_handler(std::error_code, const HTTPHeaders&) = 0;
+    virtual void websocket_handshake_error_handler(std::error_code, const HTTPHeaders*,
+                                                   const util::StringView* body) = 0;
     virtual void websocket_protocol_error_handler(std::error_code) = 0;
     //@}
 
diff --git a/Pods/Realm/include/core/realm/version.hpp b/Pods/Realm/include/core/realm/version.hpp
index 24b1582..eb6d8f7 100644
--- a/Pods/Realm/include/core/realm/version.hpp
+++ b/Pods/Realm/include/core/realm/version.hpp
@@ -21,13 +21,9 @@
 
 #include <string>
 
-// Do not use `cmakedefine` here, as certain versions can be 0, which CMake
-// interprets as being undefined.
-#define REALM_VERSION_MAJOR 5
-#define REALM_VERSION_MINOR 12
-#define REALM_VERSION_PATCH 1
-#define REALM_VERSION_EXTRA ""
-#define REALM_VERSION_STRING "5.12.1"
+#ifndef REALM_VERSION_MAJOR
+#include <realm/version_numbers.hpp>
+#endif
 
 #define REALM_PRODUCT_NAME "realm-core"
 #define REALM_VER_CHUNK "[" REALM_PRODUCT_NAME "-" REALM_VERSION_STRING "]"
diff --git a/Pods/Realm/include/core/realm/version_id.hpp b/Pods/Realm/include/core/realm/version_id.hpp
index 069b2c7..807146b 100644
--- a/Pods/Realm/include/core/realm/version_id.hpp
+++ b/Pods/Realm/include/core/realm/version_id.hpp
@@ -41,27 +41,27 @@ struct VersionID {
         index = initial_index;
     }
 
-    bool operator==(const VersionID& other)
+    bool operator==(const VersionID& other) const
     {
         return version == other.version;
     }
-    bool operator!=(const VersionID& other)
+    bool operator!=(const VersionID& other) const
     {
         return version != other.version;
     }
-    bool operator<(const VersionID& other)
+    bool operator<(const VersionID& other) const
     {
         return version < other.version;
     }
-    bool operator<=(const VersionID& other)
+    bool operator<=(const VersionID& other) const
     {
         return version <= other.version;
     }
-    bool operator>(const VersionID& other)
+    bool operator>(const VersionID& other) const
     {
         return version > other.version;
     }
-    bool operator>=(const VersionID& other)
+    bool operator>=(const VersionID& other) const
     {
         return version >= other.version;
     }
diff --git a/Pods/Realm/include/core/realm/version_numbers.hpp b/Pods/Realm/include/core/realm/version_numbers.hpp
new file mode 100644
index 0000000..89c50a2
--- /dev/null
+++ b/Pods/Realm/include/core/realm/version_numbers.hpp
@@ -0,0 +1,30 @@
+/*************************************************************************
+ *
+ * Copyright 2016 Realm Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ **************************************************************************/
+
+#ifndef REALM_VERSION_NUMBERS_HPP
+#define REALM_VERSION_NUMBERS_HPP
+
+// Do not use `cmakedefine` here, as certain versions can be 0, which CMake
+// interprets as being undefined.
+#define REALM_VERSION_MAJOR 5
+#define REALM_VERSION_MINOR 23
+#define REALM_VERSION_PATCH 6
+#define REALM_VERSION_EXTRA ""
+#define REALM_VERSION_STRING "5.23.6"
+
+#endif // REALM_VERSION_NUMBERS_HPP
diff --git a/Pods/Realm/include/core/realm/views.hpp b/Pods/Realm/include/core/realm/views.hpp
index 7925b27..ee54c6f 100644
--- a/Pods/Realm/include/core/realm/views.hpp
+++ b/Pods/Realm/include/core/realm/views.hpp
@@ -21,10 +21,10 @@
 
 #include <realm/column.hpp>
 #include <realm/handover_defs.hpp>
-
 #include <realm/util/optional.hpp>
 
 #include <vector>
+#include <unordered_set>
 
 namespace realm {
 
@@ -37,7 +37,7 @@ class BaseDescriptor {
     BaseDescriptor() = default;
     virtual ~BaseDescriptor() = default;
     virtual bool is_valid() const noexcept = 0;
-    virtual std::string get_description(TableRef attached_table) const = 0;
+    virtual std::string get_description(ConstTableRef attached_table) const = 0;
     virtual std::unique_ptr<BaseDescriptor> clone() const = 0;
     virtual DescriptorExport export_for_handover() const = 0;
     virtual DescriptorType get_type() const = 0;
@@ -46,6 +46,24 @@ class BaseDescriptor {
 // Forward declaration needed for deleted ColumnsDescriptor constructor
 class SortDescriptor;
 
+struct LinkPathPart {
+    LinkPathPart(size_t col_ndx)
+        : column_ndx(col_ndx)
+    {
+    }
+
+    LinkPathPart(size_t col_ndx, ConstTableRef source)
+        : column_ndx(col_ndx)
+        , from(source)
+    {
+    }
+
+    size_t column_ndx;
+    // "from" is omitted for forward links, if it is valid then
+    // this path describes a backlink originating from the column from[column_ndx]
+    ConstTableRef from;
+};
+
 // ColumnsDescriptor encapsulates a reference to a set of columns (possibly over
 // links), which is used to indicate the criteria columns for sort and distinct.
 // Although the input is column indices, it does not rely on those indices
@@ -87,12 +105,38 @@ class ColumnsDescriptor : public BaseDescriptor {
     // handover support
     DescriptorExport export_for_handover() const override;
 
-    std::string get_description(TableRef attached_table) const override;
+    std::string get_description(ConstTableRef attached_table) const override;
 
 protected:
+    std::string description_for_prefix(std::string prefix, ConstTableRef attached_table) const;
+
     std::vector<std::vector<const ColumnBase*>> m_columns;
 };
 
+class IncludeDescriptor : public ColumnsDescriptor {
+public:
+    IncludeDescriptor() = default;
+    // This constructor may throw an InvalidPathError exception if the path is not valid.
+    // A valid path consists of any number of connected link/list/backlink paths and always ends with a backlink
+    // column.
+    IncludeDescriptor(const Table& table, const std::vector<std::vector<LinkPathPart>>& column_indices);
+    ~IncludeDescriptor() = default;
+    std::string get_description(ConstTableRef attached_table) const override;
+    std::unique_ptr<BaseDescriptor> clone() const override;
+    DescriptorExport export_for_handover() const override;
+    DescriptorType get_type() const override
+    {
+        return DescriptorType::Include;
+    }
+    void append(const IncludeDescriptor& other);
+    void
+    report_included_backlinks(const Table* origin, size_t row_ndx,
+                              std::function<void(const Table*, const std::unordered_set<size_t>&)> reporter) const;
+
+private:
+    std::vector<std::vector<ConstTableRef>> m_backlink_sources; // stores a detached TableRef for non-backlink columns
+};
+
 class SortDescriptor : public ColumnsDescriptor {
 public:
     // Create a sort descriptor for the given columns on the given table.
@@ -115,7 +159,7 @@ class SortDescriptor : public ColumnsDescriptor {
 
     // handover support
     DescriptorExport export_for_handover() const override;
-    std::string get_description(TableRef attached_table) const override;
+    std::string get_description(ConstTableRef attached_table) const override;
 
 private:
     std::vector<bool> m_ascending;
@@ -126,7 +170,7 @@ class LimitDescriptor : public BaseDescriptor {
     LimitDescriptor(size_t limit);
     virtual ~LimitDescriptor() = default;
     bool is_valid() const noexcept override { return true; }
-    std::string get_description(TableRef attached_table) const override;
+    std::string get_description(ConstTableRef attached_table) const override;
     std::unique_ptr<BaseDescriptor> clone() const override;
     DescriptorExport export_for_handover() const override;
     size_t get_limit() const noexcept { return m_limit; }
@@ -154,9 +198,18 @@ class DescriptorOrdering {
     void append_sort(SortDescriptor sort);
     void append_distinct(DistinctDescriptor distinct);
     void append_limit(LimitDescriptor limit);
+    void append_include(IncludeDescriptor include);
+
+    /// Remove all LIMIT statements from this descriptor ordering, returning the
+    /// minimum LIMIT value that existed. If there was no LIMIT statement,
+    /// returns `none`.
+    util::Optional<size_t> remove_all_limits();
+
     bool descriptor_is_sort(size_t index) const;
     bool descriptor_is_distinct(size_t index) const;
     bool descriptor_is_limit(size_t index) const;
+    bool descriptor_is_include(size_t index) const;
+
     DescriptorType get_type(size_t index) const;
     bool is_empty() const { return m_descriptors.empty(); }
     size_t size() const { return m_descriptors.size(); }
@@ -164,9 +217,11 @@ class DescriptorOrdering {
     bool will_apply_sort() const;
     bool will_apply_distinct() const;
     bool will_apply_limit() const;
+    bool will_apply_include() const;
     realm::util::Optional<size_t> get_min_limit() const;
     bool will_limit_to_zero() const;
-    std::string get_description(TableRef target_table) const;
+    IncludeDescriptor compile_included_backlinks() const;
+    std::string get_description(ConstTableRef target_table) const;
 
     // handover support
     using HandoverPatch = std::unique_ptr<DescriptorOrderingHandoverPatch>;
diff --git a/Pods/Realm/include/impl/apple/external_commit_helper.hpp b/Pods/Realm/include/impl/apple/external_commit_helper.hpp
index c87d8b2..1fc99ed 100644
--- a/Pods/Realm/include/impl/apple/external_commit_helper.hpp
+++ b/Pods/Realm/include/impl/apple/external_commit_helper.hpp
@@ -16,7 +16,7 @@
 //
 ////////////////////////////////////////////////////////////////////////////
 
-#include <future>
+#include <thread>
 
 namespace realm {
 class Realm;
@@ -59,7 +59,7 @@ class ExternalCommitHelper {
     RealmCoordinator& m_parent;
 
     // The listener thread
-    std::future<void> m_thread;
+    std::thread m_thread;
 
     // Pipe which is waited on for changes and written to when there is a new
     // commit to notify others of. When using a named pipe m_notify_fd is
diff --git a/Pods/Realm/include/impl/object_accessor_impl.hpp b/Pods/Realm/include/impl/object_accessor_impl.hpp
index 6b985ef..48b0327 100644
--- a/Pods/Realm/include/impl/object_accessor_impl.hpp
+++ b/Pods/Realm/include/impl/object_accessor_impl.hpp
@@ -127,7 +127,7 @@ class CppContext {
     // is true, `current_row` may hold a reference to the object that should
     // be compared against.
     template<typename T>
-    T unbox(util::Any& v, bool /*create*/= false, bool /*update*/= false, bool /*update_only_diff*/ = false, size_t /*current_row*/ = realm::npos) const { return any_cast<T>(v); }
+    T unbox(util::Any& v, CreatePolicy = CreatePolicy::Skip, size_t /*current_row*/ = realm::npos) const { return any_cast<T>(v); }
 
     bool is_null(util::Any const& v) const noexcept { return !v.has_value(); }
     util::Any null_value() const noexcept { return {}; }
@@ -159,7 +159,7 @@ inline util::Any CppContext::box(RowExpr row) const
 }
 
 template<>
-inline StringData CppContext::unbox(util::Any& v, bool, bool, bool, size_t) const
+inline StringData CppContext::unbox(util::Any& v, CreatePolicy, size_t) const
 {
     if (!v.has_value())
         return StringData();
@@ -168,7 +168,7 @@ inline StringData CppContext::unbox(util::Any& v, bool, bool, bool, size_t) cons
 }
 
 template<>
-inline BinaryData CppContext::unbox(util::Any& v, bool, bool, bool, size_t) const
+inline BinaryData CppContext::unbox(util::Any& v, CreatePolicy, size_t) const
 {
     if (!v.has_value())
         return BinaryData();
@@ -177,45 +177,45 @@ inline BinaryData CppContext::unbox(util::Any& v, bool, bool, bool, size_t) cons
 }
 
 template<>
-inline RowExpr CppContext::unbox(util::Any& v, bool create, bool update, bool update_only_diff, size_t current_row) const
+inline RowExpr CppContext::unbox(util::Any& v, CreatePolicy policy, size_t current_row) const
 {
     if (auto object = any_cast<Object>(&v))
         return object->row();
     if (auto row = any_cast<RowExpr>(&v))
         return *row;
-    if (!create)
+    if (policy == CreatePolicy::Skip)
         return RowExpr();
 
     REALM_ASSERT(object_schema);
-    return Object::create(const_cast<CppContext&>(*this), realm, *object_schema, v, update, update_only_diff, current_row).row();
+    return Object::create(const_cast<CppContext&>(*this), realm, *object_schema, v, policy, current_row).row();
 }
 
 template<>
-inline util::Optional<bool> CppContext::unbox(util::Any& v, bool, bool, bool, size_t) const
+inline util::Optional<bool> CppContext::unbox(util::Any& v, CreatePolicy, size_t) const
 {
     return v.has_value() ? util::make_optional(unbox<bool>(v)) : util::none;
 }
 
 template<>
-inline util::Optional<int64_t> CppContext::unbox(util::Any& v, bool, bool, bool, size_t) const
+inline util::Optional<int64_t> CppContext::unbox(util::Any& v, CreatePolicy, size_t) const
 {
     return v.has_value() ? util::make_optional(unbox<int64_t>(v)) : util::none;
 }
 
 template<>
-inline util::Optional<double> CppContext::unbox(util::Any& v, bool, bool, bool, size_t) const
+inline util::Optional<double> CppContext::unbox(util::Any& v, CreatePolicy, size_t) const
 {
     return v.has_value() ? util::make_optional(unbox<double>(v)) : util::none;
 }
 
 template<>
-inline util::Optional<float> CppContext::unbox(util::Any& v, bool, bool, bool, size_t) const
+inline util::Optional<float> CppContext::unbox(util::Any& v, CreatePolicy, size_t) const
 {
     return v.has_value() ? util::make_optional(unbox<float>(v)) : util::none;
 }
 
 template<>
-inline Mixed CppContext::unbox(util::Any&, bool, bool, bool, size_t) const
+inline Mixed CppContext::unbox(util::Any&, CreatePolicy, size_t) const
 {
     throw std::logic_error("'Any' type is unsupported");
 }
diff --git a/Pods/Realm/include/impl/realm_coordinator.hpp b/Pods/Realm/include/impl/realm_coordinator.hpp
index e67e0ee..769b95d 100644
--- a/Pods/Realm/include/impl/realm_coordinator.hpp
+++ b/Pods/Realm/include/impl/realm_coordinator.hpp
@@ -58,6 +58,28 @@ class RealmCoordinator : public std::enable_shared_from_this<RealmCoordinator> {
     // configuration is compatible with the existing one
     std::shared_ptr<Realm> get_realm(Realm::Config config);
     std::shared_ptr<Realm> get_realm();
+#if REALM_ENABLE_SYNC
+    // Get a thread-local shared Realm with the given configuration
+    // If the Realm is not already present, it will be fully downloaded before being returned.
+    // If the Realm is already on disk, it will be fully synchronized before being returned.
+    // Timeouts and interruptions are not handled by this method and must be handled by upper layers.
+    std::shared_ptr<AsyncOpenTask> get_synchronized_realm(Realm::Config config);
+
+    // Creates the underlying sync session if it doesn't already exists.
+    // This is also created as part of opening a Realm, so only use this
+    // method if the session needs to exist before the Realm does.
+    void create_session(const Realm::Config& config);
+#endif
+
+    // Get a Realm which is not bound to the current execution context
+    ThreadSafeReference<Realm> get_unbound_realm();
+
+    // Get the existing cached Realm for the given execution context if it exists
+    std::shared_ptr<Realm> get_cached_realm(Realm::Config const&, AnyExecutionContextID);
+
+    // Bind an unbound Realm to a specific execution context. The Realm must
+    // be managed by this coordinator.
+    void bind_to_context(Realm& realm, AnyExecutionContextID);
 
     Realm::Config get_config() const { return m_config; }
 
@@ -143,9 +165,11 @@ class RealmCoordinator : public std::enable_shared_from_this<RealmCoordinator> {
 
 #if REALM_ENABLE_SYNC
     // A work queue that can be used to perform background work related to partial sync.
-    partial_sync::WorkQueue& partial_sync_work_queue();
+    _impl::partial_sync::WorkQueue& partial_sync_work_queue();
 #endif
 
+    AuditInterface* audit_context() const noexcept { return m_audit_context.get(); }
+
 private:
     Realm::Config m_config;
 
@@ -184,11 +208,15 @@ class RealmCoordinator : public std::enable_shared_from_this<RealmCoordinator> {
     std::unique_ptr<partial_sync::WorkQueue> m_partial_sync_work_queue;
 #endif
 
+    std::shared_ptr<AuditInterface> m_audit_context;
+
     // must be called with m_notifier_mutex locked
     void pin_version(VersionID version);
 
     void set_config(const Realm::Config&);
-    void create_sync_session();
+    void create_sync_session(bool force_client_resync, bool validate_sync_history);
+    void do_get_realm(Realm::Config config, std::shared_ptr<Realm>& realm,
+                      std::unique_lock<std::mutex>& realm_lock, bool bind_to_context=true);
 
     void run_async_notifiers();
     void open_helper_shared_group();
diff --git a/Pods/Realm/include/impl/weak_realm_notifier.hpp b/Pods/Realm/include/impl/weak_realm_notifier.hpp
index f0b3ad4..4a70343 100644
--- a/Pods/Realm/include/impl/weak_realm_notifier.hpp
+++ b/Pods/Realm/include/impl/weak_realm_notifier.hpp
@@ -39,7 +39,7 @@ namespace _impl {
 // a Realm instance is released from within a function holding the cache lock.
 class WeakRealmNotifier {
 public:
-    WeakRealmNotifier(const std::shared_ptr<Realm>& realm, bool cache);
+    WeakRealmNotifier(const std::shared_ptr<Realm>& realm, bool cache, bool bind_to_context);
     ~WeakRealmNotifier();
 
     // Get a strong reference to the cached realm
@@ -59,6 +59,8 @@ class WeakRealmNotifier {
 
     void notify();
 
+    void bind_to_execution_context(AnyExecutionContextID context);
+
 private:
     std::weak_ptr<Realm> m_realm;
     AnyExecutionContextID m_execution_context;
diff --git a/Pods/Realm/include/keypath_helpers.hpp b/Pods/Realm/include/keypath_helpers.hpp
new file mode 100644
index 0000000..ac165be
--- /dev/null
+++ b/Pods/Realm/include/keypath_helpers.hpp
@@ -0,0 +1,106 @@
+////////////////////////////////////////////////////////////////////////////
+//
+// Copyright 2017 Realm Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+////////////////////////////////////////////////////////////////////////////
+
+#include "object_schema.hpp"
+#include "object_store.hpp"
+#include "shared_realm.hpp"
+
+#include <realm/parser/keypath_mapping.hpp>
+
+namespace realm {
+/// Populate the mapping from public name to internal name for queries.
+static void populate_keypath_mapping(parser::KeyPathMapping& mapping, Realm& realm)
+{
+    mapping.set_backlink_class_prefix("class_");
+
+    for (auto& object_schema : realm.schema()) {
+        TableRef table;
+        auto get_table = [&] {
+            if (!table)
+                table = ObjectStore::table_for_object_type(realm.read_group(), object_schema.name);
+            return table;
+        };
+
+        for (auto& property : object_schema.persisted_properties) {
+            if (!property.public_name.empty() && property.public_name != property.name)
+                mapping.add_mapping(get_table(), property.public_name, property.name);
+        }
+
+        for (auto& property : object_schema.computed_properties) {
+            if (property.type != PropertyType::LinkingObjects)
+                continue;
+            auto native_name = util::format("@links.%1.%2", property.object_type,
+                                            property.link_origin_property_name);
+            mapping.add_mapping(get_table(), property.name, std::move(native_name));
+        }
+    }
+}
+
+/// Generate an IncludeDescriptor from a list of key paths.
+///
+/// Each key path in the list is a period ('.') seperated property path, beginning
+/// at the class defined by `object_schema` and ending with a linkingObjects relationship.
+inline IncludeDescriptor generate_include_from_keypaths(std::vector<StringData> const& paths,
+                                                        Realm& realm, ObjectSchema const& object_schema,
+                                                        parser::KeyPathMapping& mapping)
+{
+    auto base_table = ObjectStore::table_for_object_type(realm.read_group(), object_schema.name);
+    REALM_ASSERT(base_table);
+    // FIXME: the following is mostly copied from core's query_builder::apply_ordering
+    std::vector<std::vector<LinkPathPart>> properties;
+    for (size_t i = 0; i < paths.size(); ++i) {
+        StringData keypath = paths[i];
+        if (keypath.size() == 0) {
+            throw InvalidPathError("missing property name while generating INCLUDE from keypaths");
+        }
+
+        util::KeyPath path = util::key_path_from_string(keypath);
+        size_t index = 0;
+        std::vector<LinkPathPart> links;
+        ConstTableRef cur_table = base_table;
+
+        while (index < path.size()) {
+            parser::KeyPathElement element = mapping.process_next_path(cur_table, path, index); // throws if invalid
+            // backlinks use type_LinkList since list operations apply to them (and is_backlink is set)
+            if (element.col_type != type_Link && element.col_type != type_LinkList) {
+                throw InvalidPathError(util::format("Property '%1' is not a link in object of type '%2' in 'INCLUDE' clause",
+                                                    element.table->get_column_name(element.col_ndx),
+                                                    get_printable_table_name(*element.table)));
+            }
+            if (element.table == cur_table) {
+                if (element.col_ndx == realm::npos) {
+                    cur_table = element.table;
+                }
+                else {
+                    cur_table = element.table->get_link_target(element.col_ndx); // advance through forward link
+                }
+            }
+            else {
+                cur_table = element.table; // advance through backlink
+            }
+            ConstTableRef tr;
+            if (element.is_backlink) {
+                tr = element.table;
+            }
+            links.emplace_back(element.col_ndx, tr);
+        }
+        properties.push_back(std::move(links));
+    }
+    return IncludeDescriptor{*base_table, properties};
+}
+}
diff --git a/Pods/Realm/include/list.hpp b/Pods/Realm/include/list.hpp
index 532d9d8..3cf7e4a 100644
--- a/Pods/Realm/include/list.hpp
+++ b/Pods/Realm/include/list.hpp
@@ -21,12 +21,12 @@
 
 #include "collection_notifications.hpp"
 #include "impl/collection_notifier.hpp"
+#include "object.hpp"
 #include "property.hpp"
 
 #include <realm/link_view_fwd.hpp>
 #include <realm/row.hpp>
 #include <realm/table_ref.hpp>
-#include <realm/util/any.hpp>
 
 #include <functional>
 #include <memory>
@@ -125,15 +125,15 @@ class List {
     size_t find(Context&, T&& value) const;
 
     template<typename T, typename Context>
-    void add(Context&, T&& value, bool update=false);
+    void add(Context&, T&& value, CreatePolicy=CreatePolicy::ForceCreate);
     template<typename T, typename Context>
-    void insert(Context&, size_t list_ndx, T&& value, bool update=false);
+    void insert(Context&, size_t list_ndx, T&& value, CreatePolicy=CreatePolicy::ForceCreate);
     template<typename T, typename Context>
-    void set(Context&, size_t row_ndx, T&& value, bool update=false);
+    void set(Context&, size_t row_ndx, T&& value, CreatePolicy=CreatePolicy::ForceCreate);
 
     // Replace the values in this list with the values from an enumerable object
     template<typename T, typename Context>
-    void assign(Context&, T&& value, bool update=false, bool update_only_diff = false);
+    void assign(Context&, T&& value, CreatePolicy=CreatePolicy::ForceCreate);
 
     // The List object has been invalidated (due to the Realm being invalidated,
     // or the containing object being deleted)
@@ -165,7 +165,7 @@ class List {
     auto dispatch(Fn&&) const;
 
     template<typename T, typename Context>
-    void set_if_different(Context&, size_t row_ndx, T&& value, bool update=false);
+    void set_if_different(Context&, size_t row_ndx, T&& value, CreatePolicy);
 
     size_t to_table_ndx(size_t row) const noexcept;
 
@@ -187,25 +187,25 @@ auto List::get(Context& ctx, size_t row_ndx) const
 template<typename T, typename Context>
 size_t List::find(Context& ctx, T&& value) const
 {
-    return dispatch([&](auto t) { return this->find(ctx.template unbox<std::decay_t<decltype(*t)>>(value)); });
+    return dispatch([&](auto t) { return this->find(ctx.template unbox<std::decay_t<decltype(*t)>>(value, CreatePolicy::Skip)); });
 }
 
 template<typename T, typename Context>
-void List::add(Context& ctx, T&& value, bool update)
+void List::add(Context& ctx, T&& value, CreatePolicy policy)
 {
-    dispatch([&](auto t) { this->add(ctx.template unbox<std::decay_t<decltype(*t)>>(value, true, update)); });
+    dispatch([&](auto t) { this->add(ctx.template unbox<std::decay_t<decltype(*t)>>(value, policy)); });
 }
 
 template<typename T, typename Context>
-void List::insert(Context& ctx, size_t list_ndx, T&& value, bool update)
+void List::insert(Context& ctx, size_t list_ndx, T&& value, CreatePolicy policy)
 {
-    dispatch([&](auto t) { this->insert(list_ndx, ctx.template unbox<std::decay_t<decltype(*t)>>(value, true, update)); });
+    dispatch([&](auto t) { this->insert(list_ndx, ctx.template unbox<std::decay_t<decltype(*t)>>(value, policy)); });
 }
 
 template<typename T, typename Context>
-void List::set(Context& ctx, size_t row_ndx, T&& value, bool update)
+void List::set(Context& ctx, size_t row_ndx, T&& value, CreatePolicy policy)
 {
-    dispatch([&](auto t) { this->set(row_ndx, ctx.template unbox<std::decay_t<decltype(*t)>>(value, true, update)); });
+    dispatch([&](auto t) { this->set(row_ndx, ctx.template unbox<std::decay_t<decltype(*t)>>(value, policy)); });
 }
 
 namespace _impl {
@@ -234,12 +234,12 @@ inline bool help_compare_values(const RowExpr& v1, const RowExpr& v2)
 }
 
 template<typename T, typename Context>
-void List::set_if_different(Context& ctx, size_t row_ndx, T&& value, bool update)
+void List::set_if_different(Context& ctx, size_t row_ndx, T&& value, CreatePolicy policy)
 {
     dispatch([&](auto t) {
         using U = std::decay_t<decltype(*t)>;
         auto old_value =  this->get<U>(row_ndx);
-        auto new_value = ctx.template unbox<U>(value, true, update, true, _impl::help_get_current_row(old_value));
+        auto new_value = ctx.template unbox<U>(value, policy, _impl::help_get_current_row(old_value));
         if (_impl::help_compare_values(old_value, new_value))
             this->set(row_ndx, new_value);
     });
@@ -247,7 +247,7 @@ void List::set_if_different(Context& ctx, size_t row_ndx, T&& value, bool update
 
 
 template<typename T, typename Context>
-void List::assign(Context& ctx, T&& values, bool update, bool update_only_diff)
+void List::assign(Context& ctx, T&& values, CreatePolicy policy)
 {
     if (ctx.is_same_list(*this, values))
         return;
@@ -257,27 +257,26 @@ void List::assign(Context& ctx, T&& values, bool update, bool update_only_diff)
         return;
     }
 
-    if (update_only_diff) {
+    if (policy == CreatePolicy::UpdateModified) {
         size_t sz = size();
         size_t index = 0;
         ctx.enumerate_list(values, [&](auto&& element) {
             if (index < sz) {
-                this->set_if_different(ctx, index, element, update);
+                this->set_if_different(ctx, index, element, policy);
             }
             else {
-                this->add(ctx, element, update);
+                this->add(ctx, element, policy);
             }
             index++;
         });
         while (index < sz) {
-            remove(index);
-            sz--;
+            remove(--sz);
         }
     }
     else {
         remove_all();
         ctx.enumerate_list(values, [&](auto&& element) {
-            this->add(ctx, element, update);
+            this->add(ctx, element, policy);
         });
     }
 }
diff --git a/Pods/Realm/include/object.hpp b/Pods/Realm/include/object.hpp
index 67f85a1..23ccd6e 100644
--- a/Pods/Realm/include/object.hpp
+++ b/Pods/Realm/include/object.hpp
@@ -32,6 +32,18 @@ namespace _impl {
     class ObjectNotifier;
 }
 
+enum class CreatePolicy : int8_t {
+    // Do not create objects if given something that could be converted to a
+    // Realm object but isn't. Used for things like find().
+    Skip,
+    // Throw an exception if an object with the same PK already exists.
+    ForceCreate,
+    // If an object with the same PK already exists, set all fields in the input.
+    UpdateAll,
+    // If an object with the same PK already exists, only set fields which have changed.
+    UpdateModified
+};
+
 class Object {
 public:
     Object();
@@ -65,22 +77,25 @@ class Object {
     // property getter/setter
     template<typename ValueType, typename ContextType>
     void set_property_value(ContextType& ctx, StringData prop_name,
-                            ValueType value, bool try_update);
+                            ValueType value, CreatePolicy policy = CreatePolicy::ForceCreate);
 
     template<typename ValueType, typename ContextType>
     ValueType get_property_value(ContextType& ctx, StringData prop_name);
 
+    template<typename ValueType, typename ContextType>
+    ValueType get_property_value(ContextType& ctx, const Property& property);
+
     // create an Object from a native representation
     template<typename ValueType, typename ContextType>
     static Object create(ContextType& ctx, std::shared_ptr<Realm> const& realm,
                          const ObjectSchema &object_schema, ValueType value,
-                         bool try_update = false, bool update_only_diff = false,
+                         CreatePolicy policy = CreatePolicy::ForceCreate,
                          size_t current_row = size_t(-1), Row* = nullptr);
 
     template<typename ValueType, typename ContextType>
     static Object create(ContextType& ctx, std::shared_ptr<Realm> const& realm,
                          StringData object_type, ValueType value,
-                         bool try_update = false, bool update_only_diff = false,
+                         CreatePolicy policy = CreatePolicy::ForceCreate,
                          size_t current_row = size_t(-1), Row* = nullptr);
 
     template<typename ValueType, typename ContextType>
@@ -106,7 +121,7 @@ class Object {
 
     template<typename ValueType, typename ContextType>
     void set_property_value_impl(ContextType& ctx, const Property &property,
-                                 ValueType value, bool try_update, bool update_only_diff, bool is_default);
+                                 ValueType value, CreatePolicy policy, bool is_default);
     template<typename ValueType, typename ContextType>
     ValueType get_property_value_impl(ContextType& ctx, const Property &property);
 
diff --git a/Pods/Realm/include/object_accessor.hpp b/Pods/Realm/include/object_accessor.hpp
index 829a013..fff7865 100644
--- a/Pods/Realm/include/object_accessor.hpp
+++ b/Pods/Realm/include/object_accessor.hpp
@@ -41,7 +41,7 @@
 
 namespace realm {
 template <typename ValueType, typename ContextType>
-void Object::set_property_value(ContextType& ctx, StringData prop_name, ValueType value, bool try_update)
+void Object::set_property_value(ContextType& ctx, StringData prop_name, ValueType value, CreatePolicy policy)
 {
     verify_attached();
     m_realm->verify_in_write();
@@ -53,7 +53,13 @@ void Object::set_property_value(ContextType& ctx, StringData prop_name, ValueTyp
     if (property.is_primary && !m_realm->is_in_migration())
         throw ModifyPrimaryKeyException(m_object_schema->name, property.name);
 
-    set_property_value_impl(ctx, property, value, try_update, false, false);
+    set_property_value_impl(ctx, property, value, policy, false);
+}
+
+template <typename ValueType, typename ContextType>
+ValueType Object::get_property_value(ContextType& ctx, const Property& property)
+{
+    return get_property_value_impl<ValueType>(ctx, property);
 }
 
 template <typename ValueType, typename ContextType>
@@ -63,19 +69,40 @@ ValueType Object::get_property_value(ContextType& ctx, StringData prop_name)
 }
 
 namespace {
-template <class T, typename ValueType, typename ContextType>
-inline void do_update_value(ContextType& ctx, Table& table, ValueType& value, size_t col, size_t row, bool update_only_diff, bool is_default)
-{
-    auto new_val = ctx.template unbox<T>(value);
-    if (!update_only_diff || table.get<T>(col, row) != new_val) {
-        table.set(col, row, new_val, is_default);
+template <typename ValueType, typename ContextType>
+struct ValueUpdater {
+    ContextType& ctx;
+    Property const& property;
+    ValueType& value;
+    RowExpr row;
+    size_t col;
+    CreatePolicy policy;
+    bool is_default;
+
+    void operator()(RowExpr*)
+    {
+        ContextType child_ctx(ctx, property);
+        auto curr_link = row.get_link(col);
+        auto link = child_ctx.template unbox<RowExpr>(value, policy, curr_link);
+        if (policy != CreatePolicy::UpdateModified || curr_link != link.get_index()) {
+            row.set_link(col, link.get_index());
+        }
     }
-}
+
+    template<typename T>
+    void operator()(T*)
+    {
+        auto new_val = ctx.template unbox<T>(value);
+        if (policy != CreatePolicy::UpdateModified || row.get<T>(col) != new_val) {
+            row.set(col, new_val, is_default);
+        }
+    }
+};
 }
 
 template <typename ValueType, typename ContextType>
 void Object::set_property_value_impl(ContextType& ctx, const Property &property,
-                                     ValueType value, bool try_update, bool update_only_diff, bool is_default)
+                                     ValueType value, CreatePolicy policy, bool is_default)
 {
     ctx.will_change(*this, property);
 
@@ -83,7 +110,7 @@ void Object::set_property_value_impl(ContextType& ctx, const Property &property,
     size_t col = property.table_column;
     size_t row = m_row.get_index();
     if (is_nullable(property.type) && ctx.is_null(value)) {
-        if (!update_only_diff || !table.is_null(col, row)) {
+        if (policy != CreatePolicy::UpdateModified || !table.is_null(col, row)) {
             if (property.type == PropertyType::Object) {
                 if (!is_default)
                     table.nullify_link(col, row);
@@ -103,47 +130,14 @@ void Object::set_property_value_impl(ContextType& ctx, const Property &property,
 
         ContextType child_ctx(ctx, property);
         List list(m_realm, table, col, m_row.get_index());
-        list.assign(child_ctx, value, try_update, update_only_diff);
+        list.assign(child_ctx, value, policy);
         ctx.did_change();
         return;
     }
 
-    switch (property.type & ~PropertyType::Nullable) {
-        case PropertyType::Object: {
-            ContextType child_ctx(ctx, property);
-            auto curr_link = table.get_link(col,row);
-            auto link = child_ctx.template unbox<RowExpr>(value, true, try_update, update_only_diff, curr_link);
-            if (!update_only_diff || curr_link != link.get_index()) {
-                table.set_link(col, row, link.get_index(), is_default);
-            }
-            break;
-        }
-        case PropertyType::Bool:
-            do_update_value<bool>(ctx, table, value, col, row, update_only_diff, is_default);
-            break;
-        case PropertyType::Int:
-            do_update_value<int64_t>(ctx, table, value, col, row, update_only_diff, is_default);
-            break;
-        case PropertyType::Float:
-            do_update_value<float>(ctx, table, value, col, row, update_only_diff, is_default);
-            break;
-        case PropertyType::Double:
-            do_update_value<double>(ctx, table, value, col, row, update_only_diff, is_default);
-            break;
-        case PropertyType::String:
-            do_update_value<StringData>(ctx, table, value, col, row, update_only_diff, is_default);
-            break;
-        case PropertyType::Data:
-            do_update_value<BinaryData>(ctx, table, value, col, row, update_only_diff, is_default);
-            break;
-        case PropertyType::Date:
-            do_update_value<Timestamp>(ctx, table, value, col, row, update_only_diff, is_default);
-            break;
-        case PropertyType::Any:
-            throw std::logic_error("not supported");
-        default:
-            REALM_COMPILER_HINT_UNREACHABLE();
-    }
+    ValueUpdater<ValueType, ContextType> updater{ctx, property, value,
+        table.get(row),col, policy, is_default};
+    switch_on_type(property.type, updater);
     ctx.did_change();
 }
 
@@ -186,17 +180,17 @@ ValueType Object::get_property_value_impl(ContextType& ctx, const Property &prop
 template<typename ValueType, typename ContextType>
 Object Object::create(ContextType& ctx, std::shared_ptr<Realm> const& realm,
                       StringData object_type, ValueType value,
-                      bool try_update, bool update_only_diff, size_t current_row, Row* out_row)
+                      CreatePolicy policy, size_t current_row, Row* out_row)
 {
     auto object_schema = realm->schema().find(object_type);
     REALM_ASSERT(object_schema != realm->schema().end());
-    return create(ctx, realm, *object_schema, value, try_update, update_only_diff, current_row, out_row);
+    return create(ctx, realm, *object_schema, value, policy, current_row, out_row);
 }
 
 template<typename ValueType, typename ContextType>
 Object Object::create(ContextType& ctx, std::shared_ptr<Realm> const& realm,
                       ObjectSchema const& object_schema, ValueType value,
-                      bool try_update, bool update_only_diff, size_t current_row, Row* out_row)
+                      CreatePolicy policy, size_t current_row, Row* out_row)
 {
     realm->verify_in_write();
 
@@ -247,7 +241,7 @@ Object Object::create(ContextType& ctx, std::shared_ptr<Realm> const& realm,
                 REALM_TERMINATE("Unsupported primary key type.");
             }
         }
-        else if (!try_update) {
+        else if (policy == CreatePolicy::ForceCreate) {
             if (realm->is_in_migration()) {
                 // Creating objects with duplicate primary keys is allowed in migrations
                 // as long as there are no duplicates at the end, as adding an entirely
@@ -263,7 +257,7 @@ Object Object::create(ContextType& ctx, std::shared_ptr<Realm> const& realm,
         }
     }
     else {
-        if (update_only_diff && current_row != realm::not_found) {
+        if (policy == CreatePolicy::UpdateModified && current_row != realm::not_found) {
             row_index = current_row;
         }
         else {
@@ -299,7 +293,7 @@ Object Object::create(ContextType& ctx, std::shared_ptr<Realm> const& realm,
                 throw MissingPropertyValueException(object_schema.name, prop.name);
         }
         if (v)
-            object.set_property_value_impl(ctx, prop, *v, try_update, update_only_diff, is_default);
+            object.set_property_value_impl(ctx, prop, *v, policy, is_default);
     }
 #if REALM_ENABLE_SYNC
     if (realm->is_partial() && object_schema.name == "__User") {
diff --git a/Pods/Realm/include/object_schema.hpp b/Pods/Realm/include/object_schema.hpp
index 66cb118..3637122 100644
--- a/Pods/Realm/include/object_schema.hpp
+++ b/Pods/Realm/include/object_schema.hpp
@@ -49,6 +49,8 @@ class ObjectSchema {
     std::vector<Property> computed_properties;
     std::string primary_key;
 
+    Property *property_for_public_name(StringData public_name);
+    const Property *property_for_public_name(StringData public_name) const;
     Property *property_for_name(StringData name);
     const Property *property_for_name(StringData name) const;
     Property *primary_key_property() {
diff --git a/Pods/Realm/include/property.hpp b/Pods/Realm/include/property.hpp
index ad76b9d..f0a384a 100644
--- a/Pods/Realm/include/property.hpp
+++ b/Pods/Realm/include/property.hpp
@@ -62,7 +62,24 @@ struct Property {
     using IsPrimary = util::TaggedBool<class IsPrimaryTag>;
     using IsIndexed = util::TaggedBool<class IsIndexedTag>;
 
+    // The internal column name used in the Realm file.
     std::string name;
+
+    // The public name used by the binding to represent the internal column name in the Realm file. Bindings can use
+    // this to expose a different name in the binding API, e.g. to map between different naming conventions.
+    //
+    // Public names are only ever user defined, they are not persisted on disk, so reading the schema from the file
+    // will leave this field empty. If `public_name` is empty, the internal and public name are considered to be the same.
+    //
+    // ObjectStore will ensure that no conflicts occur between persisted properties and the public name, so
+    // the public name is just as unique an identifier as the internal name in the file.
+    //
+    // In order to respect public names bindings should use `ObjectSchema::property_for_public_name()` in the schema
+    // and `Object::value_for_property()` in the Object accessor for reading fields defined by the public name.
+    //
+    // For queries, bindings should provide an appropriate `KeyPathMapping` definition. Bindings are responsible
+    // for creating this.
+    std::string public_name;
     PropertyType type = PropertyType::Int;
     std::string object_type;
     std::string link_origin_property_name;
@@ -73,10 +90,10 @@ struct Property {
 
     Property() = default;
 
-    Property(std::string name, PropertyType type, IsPrimary primary = false, IsIndexed indexed = false);
+    Property(std::string name, PropertyType type, IsPrimary primary = false, IsIndexed indexed = false, std::string public_name = "");
 
     Property(std::string name, PropertyType type, std::string object_type,
-             std::string link_origin_property_name = "");
+             std::string link_origin_property_name = "", std::string public_name = "");
 
     Property(Property const&) = default;
     Property(Property&&) = default;
@@ -196,8 +213,10 @@ static const char *string_for_property_type(PropertyType type)
 }
 
 inline Property::Property(std::string name, PropertyType type,
-                          IsPrimary primary, IsIndexed indexed)
+                          IsPrimary primary, IsIndexed indexed,
+                          std::string public_name)
 : name(std::move(name))
+, public_name(std::move(public_name))
 , type(type)
 , is_primary(primary)
 , is_indexed(indexed)
@@ -206,8 +225,10 @@ inline Property::Property(std::string name, PropertyType type,
 
 inline Property::Property(std::string name, PropertyType type,
                           std::string object_type,
-                          std::string link_origin_property_name)
+                          std::string link_origin_property_name,
+                          std::string public_name)
 : name(std::move(name))
+, public_name(std::move(public_name))
 , type(type)
 , object_type(std::move(object_type))
 , link_origin_property_name(std::move(link_origin_property_name))
diff --git a/Pods/Realm/include/results.hpp b/Pods/Realm/include/results.hpp
index ee8a298..e1c82bc 100644
--- a/Pods/Realm/include/results.hpp
+++ b/Pods/Realm/include/results.hpp
@@ -328,7 +328,9 @@ auto Results::last(Context& ctx)
 template<typename Context, typename T>
 size_t Results::index_of(Context& ctx, T value)
 {
-    return dispatch([&](auto t) { return this->index_of(ctx.template unbox<std::decay_t<decltype(*t)>>(value)); });
+    return dispatch([&](auto t) {
+        return this->index_of(ctx.template unbox<std::decay_t<decltype(*t)>>(value, CreatePolicy::Skip));
+    });
 }
 
 template <typename ValueType, typename ContextType>
@@ -345,11 +347,14 @@ void Results::set_property_value(ContextType& ctx, StringData prop_name, ValueTy
         throw ModifyPrimaryKeyException(m_object_schema->name, prop->name);
     }
 
-    // Update all objects in this ResultSets
-    size_t size = this->size();
+    // Update all objects in this ResultSets. Use snapshot to avoid correctness problems if the
+    // object is removed from the TableView after the property update as well as avoiding to
+    // re-evaluating the query too many times.
+    auto snapshot = this->snapshot();
+    size_t size = snapshot.size();
     for (size_t i = 0; i < size; ++i) {
-        Object obj(m_realm, *m_object_schema, get(i));
-        obj.set_property_value_impl(ctx, *prop, value, true, false, false);
+        Object obj(m_realm, *m_object_schema, snapshot.get(i));
+        obj.set_property_value_impl(ctx, *prop, value, CreatePolicy::ForceCreate, false);
     }
 }
 
diff --git a/Pods/Realm/include/shared_realm.hpp b/Pods/Realm/include/shared_realm.hpp
index 4a7b701..a2db0ba 100644
--- a/Pods/Realm/include/shared_realm.hpp
+++ b/Pods/Realm/include/shared_realm.hpp
@@ -32,6 +32,8 @@
 #include <memory>
 
 namespace realm {
+class AsyncOpenTask;
+class AuditInterface;
 class BindingContext;
 class Group;
 class Realm;
@@ -188,6 +190,11 @@ class Realm : public std::enable_shared_from_this<Realm> {
         // User-supplied encryption key. Must be either empty or 64 bytes.
         std::vector<char> encryption_key;
 
+        // Core and Object Store will in some cases need to create named pipes alongside the Realm file.
+        // But on some filesystems this can be a problem (e.g. external storage on Android that uses FAT32).
+        // In order to work around this, a separate path can be specified for these files.
+        std::string fifo_files_fallback_path;
+
         bool in_memory = false;
         SchemaMode schema_mode = SchemaMode::Automatic;
 
@@ -242,9 +249,12 @@ class Realm : public std::enable_shared_from_this<Realm> {
         /// A data structure storing data used to configure the Realm for sync support.
         std::shared_ptr<SyncConfig> sync_config;
 
-        // FIXME: Realm Java manages sync at the Java level, so it needs to create Realms using the sync history
-        //        format.
+        // Open the Realm using the sync history mode even if a sync
+        // configuration is not supplied.
         bool force_sync_history = false;
+
+        // A factory function which produces an audit implementation.
+        std::function<std::shared_ptr<AuditInterface>()> audit_factory;
     };
 
     // Get a cached Realm or create a new one if no cached copies exists
@@ -252,6 +262,20 @@ class Realm : public std::enable_shared_from_this<Realm> {
     // encryption key will raise an exception.
     static SharedRealm get_shared_realm(Config config);
 
+    // Get a Realm for the given execution context (or current thread if `none`)
+    // from the thread safe reference. May return a cached Realm or create a new one.
+    static SharedRealm get_shared_realm(ThreadSafeReference<Realm>, util::Optional<AbstractExecutionContextID> = util::none);
+
+#if REALM_ENABLE_SYNC
+    // Open a synchronized Realm and make sure it is fully up to date before
+    // returning it.
+    //
+    // It is possible to both cancel the download and listen to download progress
+    // using the `AsyncOpenTask` returned. Note that the download doesn't actually
+    // start until you call `AsyncOpenTask::start(callback)`
+    static std::shared_ptr<AsyncOpenTask> get_synchronized_realm(Config config);
+#endif
+
     // Updates a Realm to a given schema, using the Realm's pre-set schema mode.
     void update_schema(Schema schema, uint64_t version=0,
                        MigrationFunction migration_function=nullptr,
@@ -279,7 +303,10 @@ class Realm : public std::enable_shared_from_this<Realm> {
     void commit_transaction();
     void cancel_transaction();
     bool is_in_transaction() const noexcept;
+
     bool is_in_read_transaction() const { return !!m_group; }
+    VersionID read_transaction_version() const;
+    Group& read_group();
 
     bool is_in_migration() const noexcept { return m_in_migration; }
 
@@ -329,6 +356,8 @@ class Realm : public std::enable_shared_from_this<Realm> {
     ComputedPrivileges get_privileges(StringData object_type);
     ComputedPrivileges get_privileges(RowExpr row);
 
+    AuditInterface* audit_context() const noexcept;
+
     static SharedRealm make_shared_realm(Config config, std::shared_ptr<_impl::RealmCoordinator> coordinator = nullptr) {
         struct make_shared_enabler : public Realm {
             make_shared_enabler(Config config, std::shared_ptr<_impl::RealmCoordinator> coordinator)
@@ -426,12 +455,8 @@ class Realm : public std::enable_shared_from_this<Realm> {
 public:
     std::unique_ptr<BindingContext> m_binding_context;
 
-    // FIXME private
-    Group& read_group();
-
-    std::size_t compute_size();
-    
-    Replication *history() { return m_history.get(); }
+    // FIXME: This is currently needed by the adapter to get access to its changeset cooker
+    Replication* history() { return m_history.get(); }
 
     friend class _impl::RealmFriend;
 };
diff --git a/Pods/Realm/include/sync/async_open_task.hpp b/Pods/Realm/include/sync/async_open_task.hpp
new file mode 100644
index 0000000..a69c443
--- /dev/null
+++ b/Pods/Realm/include/sync/async_open_task.hpp
@@ -0,0 +1,60 @@
+////////////////////////////////////////////////////////////////////////////
+//
+// Copyright 2019 Realm Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+////////////////////////////////////////////////////////////////////////////
+
+#ifndef ASYNC_OPEN_TASK_HPP
+#define ASYNC_OPEN_TASK_HPP
+
+#include "util/atomic_shared_ptr.hpp"
+
+#include <functional>
+#include <memory>
+
+namespace realm {
+class Realm;
+class SyncSession;
+template<typename> class ThreadSafeReference;
+namespace _impl {
+class RealmCoordinator;
+}
+
+// Class used to wrap the intent of opening a new Realm or fully synchronize it before returning it to the user
+// Timeouts are not handled by this class but must be handled by each binding.
+class AsyncOpenTask : public std::enable_shared_from_this<AsyncOpenTask> {
+public:
+    AsyncOpenTask(std::shared_ptr<_impl::RealmCoordinator> coordinator, std::shared_ptr<realm::SyncSession> session);
+    // Starts downloading the Realm. The callback will be triggered either when the download completes
+    // or an error is encountered.
+    //
+    // If multiple AsyncOpenTasks all attempt to download the same Realm and one of them is canceled,
+    // the other tasks will receive a "Cancelled" exception.
+    void start(std::function<void(ThreadSafeReference<Realm>, std::exception_ptr)> callback);
+
+    // Cancels the download and stops the session. No further functions should be called on this class.
+    void cancel();
+
+    uint64_t register_download_progress_notifier(std::function<void(uint64_t transferred_bytes, uint64_t transferrable_bytes)> callback);
+    void unregister_download_progress_notifier(uint64_t token);
+
+private:
+    std::shared_ptr<_impl::RealmCoordinator> m_coordinator;
+    util::AtomicSharedPtr<SyncSession> m_session;
+};
+
+}
+
+#endif // // ASYNC_OPEN_TASK_HPP
diff --git a/Pods/Realm/include/sync/impl/sync_client.hpp b/Pods/Realm/include/sync/impl/sync_client.hpp
index 53c3f50..40ef227 100644
--- a/Pods/Realm/include/sync/impl/sync_client.hpp
+++ b/Pods/Realm/include/sync/impl/sync_client.hpp
@@ -39,26 +39,47 @@ namespace _impl {
 using ReconnectMode = sync::Client::ReconnectMode;
 
 struct SyncClient {
-    SyncClient(std::unique_ptr<util::Logger> logger, ReconnectMode reconnect_mode, bool multiplex_sessions, const std::string& user_agent_application_info)
-        : m_client(make_client(*logger, reconnect_mode, multiplex_sessions, user_agent_application_info)) // Throws
-        , m_logger(std::move(logger))
-        , m_thread([this] {
-            if (g_binding_callback_thread_observer) {
-                g_binding_callback_thread_observer->did_create_thread();
-                auto will_destroy_thread = util::make_scope_exit([&]() noexcept {
-                    g_binding_callback_thread_observer->will_destroy_thread();
-                });
-                try {
-                    m_client.run(); // Throws
-                }
-                catch (std::exception const& e) {
-                    g_binding_callback_thread_observer->handle_error(e);
-                }
-            }
-            else {
+    SyncClient(std::unique_ptr<util::Logger> logger, SyncClientConfig const& config)
+    : m_client([&] {
+        sync::Client::Config c;
+        c.logger = logger.get();
+        c.reconnect_mode = config.reconnect_mode;
+        c.one_connection_per_session = !config.multiplex_sessions;
+        c.user_agent_application_info = util::format("%1 %2", config.user_agent_binding_info,
+                                                     config.user_agent_application_info);
+
+        // Only set the timeouts if they have sensible values
+        if (config.timeouts.connect_timeout >= 1000)
+            c.connect_timeout = config.timeouts.connect_timeout;
+        if (config.timeouts.connection_linger_time > 0)
+            c.connection_linger_time = config.timeouts.connection_linger_time;
+        if (config.timeouts.ping_keepalive_period > 5000)
+            c.ping_keepalive_period = config.timeouts.ping_keepalive_period;
+        if (config.timeouts.pong_keepalive_timeout > 5000)
+            c.pong_keepalive_timeout = config.timeouts.pong_keepalive_timeout;
+        if (config.timeouts.fast_reconnect_limit > 1000)
+            c.fast_reconnect_limit = config.timeouts.fast_reconnect_limit;
+
+        return c;
+    }())
+    , m_logger(std::move(logger))
+    , m_thread([this] {
+        if (g_binding_callback_thread_observer) {
+            g_binding_callback_thread_observer->did_create_thread();
+            auto will_destroy_thread = util::make_scope_exit([&]() noexcept {
+                g_binding_callback_thread_observer->will_destroy_thread();
+            });
+            try {
                 m_client.run(); // Throws
             }
-        }) // Throws
+            catch (std::exception const& e) {
+                g_binding_callback_thread_observer->handle_error(e);
+            }
+        }
+        else {
+            m_client.run(); // Throws
+        }
+    }) // Throws
 #if NETWORK_REACHABILITY_AVAILABLE
     , m_reachability_observer(none, [=](const NetworkReachabilityStatus status) {
         if (status != NotReachable)
@@ -89,23 +110,12 @@ struct SyncClient {
         return std::make_unique<sync::Session>(m_client, std::move(path), std::move(config));
     }
 
-
     ~SyncClient()
     {
         stop();
     }
 
 private:
-    static sync::Client make_client(util::Logger& logger, ReconnectMode reconnect_mode, bool multiplex_sessions, const std::string& user_agent_application_info)
-    {
-        sync::Client::Config config;
-        config.logger = &logger;
-        config.reconnect_mode = std::move(reconnect_mode);
-        config.one_connection_per_session = !multiplex_sessions;
-        config.user_agent_application_info = user_agent_application_info;
-        return sync::Client(std::move(config)); // Throws
-    }
-
     sync::Client m_client;
     const std::unique_ptr<util::Logger> m_logger;
     std::thread m_thread;
diff --git a/Pods/Realm/include/sync/impl/sync_file.hpp b/Pods/Realm/include/sync/impl/sync_file.hpp
index 67ce5f8..9863f19 100644
--- a/Pods/Realm/include/sync/impl/sync_file.hpp
+++ b/Pods/Realm/include/sync/impl/sync_file.hpp
@@ -97,13 +97,13 @@ class SyncFileManager {
         return m_base_path;
     }
 
-    std::string recovery_directory_path() const
+    std::string recovery_directory_path(util::Optional<std::string> const& directory=none) const
     {
-        return get_special_directory(c_recovery_directory);
+        return get_special_directory(directory.value_or(c_recovery_directory));
     }
 
 private:
-    std::string m_base_path;
+    const std::string m_base_path;
 
     static constexpr const char c_sync_directory[] = "realm-object-server";
     static constexpr const char c_utility_directory[] = "io.realm.object-server-utility";
diff --git a/Pods/Realm/include/sync/impl/sync_metadata.hpp b/Pods/Realm/include/sync/impl/sync_metadata.hpp
index 7414d9d..a6e8bed 100644
--- a/Pods/Realm/include/sync/impl/sync_metadata.hpp
+++ b/Pods/Realm/include/sync/impl/sync_metadata.hpp
@@ -185,24 +185,19 @@ friend class SyncFileActionMetadata;
     // Return a Results object containing all pending actions.
     SyncFileActionMetadataResults all_pending_actions() const;
 
-    // Delete an existing metadata action given the original name of the Realm it involves.
-    // Returns true iff there was an existing metadata action and it was deleted.
-    bool delete_metadata_action(const std::string&) const;
-
     // Retrieve or create user metadata.
     // Note: if `make_is_absent` is true and the user has been marked for deletion, it will be unmarked.
     util::Optional<SyncUserMetadata> get_or_make_user_metadata(const std::string& identity, const std::string& url,
                                                                bool make_if_absent=true) const;
 
     // Retrieve file action metadata.
-    util::Optional<SyncFileActionMetadata> get_file_action_metadata(const std::string& path) const;
+    util::Optional<SyncFileActionMetadata> get_file_action_metadata(StringData path) const;
 
     // Create file action metadata.
-    SyncFileActionMetadata make_file_action_metadata(const std::string& original_name,
-                                                     const std::string& url,
-                                                     const std::string& local_uuid,
-                                                     SyncFileActionMetadata::Action action,
-                                                     util::Optional<std::string> new_name=none) const;
+    void make_file_action_metadata(StringData original_name, StringData url,
+                                   StringData local_uuid,
+                                   SyncFileActionMetadata::Action action,
+                                   StringData new_name = {}) const;
 
     // Get the unique identifier of this client.
     const std::string& client_uuid() const { return m_client_uuid; }
@@ -223,6 +218,8 @@ friend class SyncFileActionMetadata;
     SyncFileActionMetadata::Schema m_file_action_schema;
     SyncClientMetadata::Schema m_client_schema;
     std::string m_client_uuid;
+
+    std::shared_ptr<Realm> get_realm() const;
 };
 
 }
diff --git a/Pods/Realm/include/sync/partial_sync.hpp b/Pods/Realm/include/sync/partial_sync.hpp
index 04c9022..bfce163 100644
--- a/Pods/Realm/include/sync/partial_sync.hpp
+++ b/Pods/Realm/include/sync/partial_sync.hpp
@@ -36,6 +36,17 @@ class Realm;
 
 namespace partial_sync {
 static constexpr const char* result_sets_type_name = "__ResultSets";
+static constexpr const char* property_name = "name";
+static constexpr const char* property_query = "query";
+static constexpr const char* property_matches_property_name = "matches_property";
+static constexpr const char* property_status = "status";
+static constexpr const char* property_error_message = "error_message";
+static constexpr const char* property_query_parse_counter = "query_parse_counter";
+static constexpr const char* property_created_at = "created_at";
+static constexpr const char* property_updated_at = "updated_at";
+static constexpr const char* property_expires_at = "expires_at";
+static constexpr const char* property_time_to_live = "time_to_live";
+static constexpr const size_t result_sets_property_count = 10;
 
 struct InvalidRealmStateException : public std::logic_error {
     InvalidRealmStateException(const std::string& msg);
@@ -45,6 +56,10 @@ struct ExistingSubscriptionException : public std::runtime_error {
     ExistingSubscriptionException(const std::string& msg);
 };
 
+struct QueryTypeMismatchException: public std::logic_error {
+    QueryTypeMismatchException(const std::string& msg);
+};
+
 enum class SubscriptionState : int8_t;
 
 struct SubscriptionNotificationToken {
@@ -52,6 +67,29 @@ struct SubscriptionNotificationToken {
     NotificationToken result_sets_token;
 };
 
+struct SubscriptionCallbackWrapper {
+    std::function<void()> callback;
+    util::Optional<SubscriptionState> last_state;
+};
+
+struct SubscriptionOptions {
+    // A user defined name for referencing this subscription later. If no name is provided,
+    // a default name will be generated based off the contents of the query.
+    util::Optional<std::string> user_provided_name;
+    // `time_to_live` is expressed in milliseconds and indicates for how long a subscription should
+    // be persisted when not used. If no value is provided, the subscription will live until manually
+    // deleted.
+    util::Optional<int64_t> time_to_live_ms = none;
+    // If a subscription with the given name already exists the behaviour depends on `update`. If
+    // `update = true` the existing subscription will replace its query and time_to_live with the
+    // provided values. If `update = false` an exception is thrown if the new query doesn't match
+    // the old one. If no name is provided, the `update` flag is ignored.
+    bool update = false;
+    // A container which denotes a set of backlinks (linkingObjects) which should be included
+    // in the subscription.
+    IncludeDescriptor inclusions;
+};
+
 class Subscription {
 public:
     ~Subscription();
@@ -63,22 +101,33 @@ class Subscription {
 
     SubscriptionNotificationToken add_notification_callback(std::function<void()> callback);
 
+    util::Optional<Object> result_set_object() const;
+
 private:
     Subscription(std::string name, std::string object_type, std::shared_ptr<Realm>);
 
-    util::Optional<Object> result_set_object() const;
-
     void error_occurred(std::exception_ptr);
+    void run_callback(SubscriptionCallbackWrapper& callback_wrapper);
 
     ObjectSchema m_object_schema;
 
     mutable Results m_result_sets;
 
+    // Timestamp indicating when the subscription wrapper is created. This is used when checking the Results notifications
+    // By comparing this timestamp against the real subscriptions `created_at` and `updated_at` fields we can determine
+    // whether the subscription is in progress of being updated or created.
+    Timestamp m_wrapper_created_at;
+
+    // Track the actual underlying subscription object once it is available. This is used to better track
+    // unsubscriptions.
+    util::Optional<Row> m_result_sets_object = none;
+
     struct Notifier;
     _impl::CollectionNotifier::Handle<Notifier> m_notifier;
 
-    friend Subscription subscribe(Results const&, util::Optional<std::string>);
+    friend Subscription subscribe(Results const&, SubscriptionOptions);
     friend void unsubscribe(Subscription&);
+
 };
 
 /// Create a Query-based subscription from the query associated with the `Results`.
@@ -90,7 +139,7 @@ class Subscription {
 ///
 /// Programming errors, such as attempting to create a subscription in a Realm that is not
 /// Query-based, or subscribing to an unsupported query, will throw an exception.
-Subscription subscribe(Results const&, util::Optional<std::string> name);
+Subscription subscribe(Results const&, SubscriptionOptions options);
 
 // Create a subscription from the query associated with the `Results`
 //
@@ -101,7 +150,16 @@ Subscription subscribe(Results const&, util::Optional<std::string> name);
 // a Realm that is not Query-based, or subscribing to an unsupported query, will throw an exception.
 //
 // The Row that represents the Subscription in the  __ResultsSets table is returned.
-RowExpr subscribe_blocking(Results const&, util::Optional<std::string> name);
+//
+// If a subscription with the given name already exists the behaviour depends on `update`. If
+// `update = true` the existing subscription will replace its query and time_to_live with the
+// provided values. If `update = false` an exception is thrown if the new query doesn't match
+// the old one. If no name is provided, the `update` flag is ignored.
+//
+// `time_to_live` is expressed in milliseconds and indicates for how long a subscription should
+// be persisted when not used. If no value is provided, the subscription will live until manually
+// deleted.
+Row subscribe_blocking(Results const&, util::Optional<std::string> name, util::Optional<int64_t> time_to_live_ms = none, bool update = false);
 
 /// Remove a partial sync subscription.
 ///
@@ -121,6 +179,7 @@ void unsubscribe(Object&&);
 namespace _impl {
 
 void initialize_schema(Group&);
+void ensure_partial_sync_schema_initialized(Realm&);
 
 } // namespace _impl
 } // namespace realm
diff --git a/Pods/Realm/include/sync/sync_config.hpp b/Pods/Realm/include/sync/sync_config.hpp
index 56cca28..bab82e5 100644
--- a/Pods/Realm/include/sync/sync_config.hpp
+++ b/Pods/Realm/include/sync/sync_config.hpp
@@ -108,11 +108,23 @@ struct SyncError {
         return (error_code == ProtocolError::bad_server_file_ident
                 || error_code == ProtocolError::bad_client_file_ident
                 || error_code == ProtocolError::bad_server_version
-                || error_code == ProtocolError::diverging_histories);
+                || error_code == ProtocolError::diverging_histories
+                || error_code == ProtocolError::client_file_expired);
     }
 };
 
+enum class ClientResyncMode : unsigned char {
+    // Enable automatic client resync with local transaction recovery
+    Recover = 0,
+    // Enable automatic client resync without local transaction recovery
+    DiscardLocal = 1,
+    // Fire a client reset error
+    Manual = 2,
+};
+
 struct SyncConfig {
+    using ProxyConfig = sync::Session::Config::ProxyConfig;
+
     std::shared_ptr<SyncUser> user;
     // The URL of the Realm, or of the reference Realm if partial sync is being used.
     // The URL that will be used when connecting to the object server is that returned by `realm_url()`,
@@ -120,23 +132,34 @@ struct SyncConfig {
     // Set this field, but read from `realm_url()`.
     std::string reference_realm_url;
     SyncSessionStopPolicy stop_policy = SyncSessionStopPolicy::AfterChangesUploaded;
-    std::function<SyncBindSessionHandler> bind_session_handler = nullptr;
-    std::function<SyncSessionErrorHandler> error_handler = nullptr;
-    std::shared_ptr<ChangesetTransformer> transformer = nullptr;
-    util::Optional<std::array<char, 64>> realm_encryption_key = none;
+    std::function<SyncBindSessionHandler> bind_session_handler;
+    std::function<SyncSessionErrorHandler> error_handler;
+    std::shared_ptr<ChangesetTransformer> transformer;
+    util::Optional<std::array<char, 64>> realm_encryption_key;
     bool client_validate_ssl = true;
-    util::Optional<std::string> ssl_trust_certificate_path = none;
-    std::function<sync::Session::SSLVerifyCallback> ssl_verify_callback = nullptr;
+    util::Optional<std::string> ssl_trust_certificate_path;
+    std::function<sync::Session::SSLVerifyCallback> ssl_verify_callback;
+    util::Optional<ProxyConfig> proxy_config;
     bool is_partial = false;
-    util::Optional<std::string> custom_partial_sync_identifier = none;
+    util::Optional<std::string> custom_partial_sync_identifier;
+
+    // If true, upload/download waits are canceled on any sync error and not just fatal ones
+    bool cancel_waits_on_nonfatal_error = false;
 
     bool validate_sync_history = true;
 
-    util::Optional<std::string> authorization_header_name = none;
+    util::Optional<std::string> authorization_header_name;
     std::map<std::string, std::string> custom_http_headers;
 
+    // Set the URL path prefix sync will use when opening a websocket for this session. Default is `/realm-sync`.
+    // Useful when the sync worker sits behind a firewall or load-balancer that rewrites incoming requests.
     util::Optional<std::string> url_prefix = none;
 
+    // The name of the directory which Realms should be backed up to following
+    // a client reset
+    util::Optional<std::string> recovery_directory;
+    ClientResyncMode client_resync_mode = ClientResyncMode::Recover;
+
     // The URL that will be used when connecting to the object server.
     // This will differ from `reference_realm_url` when partial sync is being used.
     std::string realm_url() const;
diff --git a/Pods/Realm/include/sync/sync_manager.hpp b/Pods/Realm/include/sync/sync_manager.hpp
index 764a57d..2e298c6 100644
--- a/Pods/Realm/include/sync/sync_manager.hpp
+++ b/Pods/Realm/include/sync/sync_manager.hpp
@@ -55,23 +55,53 @@ class SyncLoggerFactory {
     virtual std::unique_ptr<util::Logger> make_logger(util::Logger::Level) = 0;
 };
 
-class SyncManager {
-friend class SyncSession;
-public:
+struct SyncClientTimeouts {
+    // See sync::Client::Config for the meaning of these fields.
+    uint64_t connect_timeout = sync::Client::default_connect_timeout;
+    uint64_t connection_linger_time = sync::Client::default_connection_linger_time;
+    uint64_t ping_keepalive_period = sync::Client::default_ping_keepalive_period;
+    uint64_t pong_keepalive_timeout = sync::Client::default_pong_keepalive_timeout;
+    uint64_t fast_reconnect_limit = sync::Client::default_fast_reconnect_limit;
+};
+
+struct SyncClientConfig {
+    using ReconnectMode = sync::Client::ReconnectMode;
     enum class MetadataMode {
         NoEncryption,                   // Enable metadata, but disable encryption.
         Encryption,                     // Enable metadata, and use encryption (automatic if possible).
         NoMetadata,                     // Disable metadata.
     };
 
+    std::string base_file_path;
+    MetadataMode metadata_mode = MetadataMode::Encryption;
+    util::Optional<std::vector<char>> custom_encryption_key;
+    bool reset_metadata_on_error = false;;
+
+    SyncLoggerFactory* logger_factory = nullptr;
+    // FIXME: Should probably be util::Logger::Level::error
+    util::Logger::Level log_level = util::Logger::Level::info;
+    ReconnectMode reconnect_mode = ReconnectMode::normal;
+    bool multiplex_sessions = false;
+
+    // Optional information about the binding/application that is sent as part of the User-Agent
+    // when establishing a connection to the server.
+    std::string user_agent_binding_info;
+    std::string user_agent_application_info;
+
+    SyncClientTimeouts timeouts;
+};
+
+class SyncManager {
+friend class SyncSession;
+public:
+    using MetadataMode = SyncClientConfig::MetadataMode;
+
     static SyncManager& shared();
 
-    // Configure the metadata and file management subsystems. This MUST be called upon startup.
-    void configure(const std::string& base_file_path,
-                               MetadataMode metadata_mode=MetadataMode::Encryption,
-                               const std::string& user_agent_binding_info = "",
-                               util::Optional<std::vector<char>> custom_encryption_key=none,
-                               bool reset_metadata_on_error=false);
+    // Configure the metadata and file management subsystems and sync client
+    // options. This must be called before a SyncSession is first created, and
+    // will not reconfigure anything if the SyncClient already exists.
+    void configure(SyncClientConfig config);
 
     // Immediately run file actions for a single Realm at a given original path.
     // Returns whether or not a file action was successfully executed for the specified Realm.
@@ -82,8 +112,7 @@ friend class SyncSession;
     // Use a single connection for all sync sessions for each host/port rather
     // than one per session.
     // This must be called before any sync sessions are created, cannot be
-    // disabled afterwards, and currently is incompatible with using a load
-    // balancer or automatic failover.
+    // disabled afterwards, and currently is incompatible with automatic failover.
     void enable_session_multiplexing();
 
     // Sets the log level for the Sync Client.
@@ -92,12 +121,20 @@ friend class SyncSession;
     void set_log_level(util::Logger::Level) noexcept;
     void set_logger_factory(SyncLoggerFactory&) noexcept;
 
+    // Create a new logger of the type which will be used by the sync client
+    std::unique_ptr<util::Logger> make_logger() const;
+
     // Sets the application level user agent string.
     // This should have the format specified here: https://github.com/realm/realm-sync/blob/develop/src/realm/sync/client.hpp#L126
     // The user agent can only be set up  until the  point the Sync Client is created. This happens when the first
     // Session is created.
     void set_user_agent(std::string user_agent);
 
+    // Sets client timeout settings.
+    // The timeout settings can only be set up until the point the Sync Client is created.
+    // This happens when the first Session is created.
+    void set_timeouts(SyncClientTimeouts timeouts);
+
     /// Ask all valid sync sessions to perform whatever tasks might be necessary to
     /// re-establish connectivity with the Realm Object Server. It is presumed that
     /// the caller knows that network connectivity has been restored.
@@ -108,10 +145,15 @@ friend class SyncSession;
 
     util::Logger::Level log_level() const noexcept;
 
-    std::shared_ptr<SyncSession> get_session(const std::string& path, const SyncConfig& config);
+    std::shared_ptr<SyncSession> get_session(const std::string& path, const SyncConfig& config, bool force_client_resync=false);
     std::shared_ptr<SyncSession> get_existing_session(const std::string& path) const;
     std::shared_ptr<SyncSession> get_existing_active_session(const std::string& path) const;
 
+    // Returns `true` if the SyncManager still contains any existing sessions not yet fully cleaned up.
+    // This will return true as long as there is an external reference to a session object, no matter
+    // the state of that session.
+    bool has_existing_sessions();
+
     // If the metadata manager is configured, perform an update. Returns `true` iff the code was run.
     bool perform_metadata_update(std::function<void(const SyncMetadataManager&)> update_function) const;
 
@@ -149,7 +191,7 @@ friend class SyncSession;
     std::string path_for_realm(const SyncUser& user, const std::string& raw_realm_url) const;
 
     // Get the path of the recovery directory for backed-up or recovered Realms.
-    std::string recovery_directory_path() const;
+    std::string recovery_directory_path(util::Optional<std::string> const& custom_dir_name=none) const;
 
     // Get the unique identifier of this client.
     std::string client_uuid() const;
@@ -180,11 +222,6 @@ friend class SyncSession;
 
     mutable std::mutex m_mutex;
 
-    // FIXME: Should probably be util::Logger::Level::error
-    util::Logger::Level m_log_level = util::Logger::Level::info;
-    SyncLoggerFactory* m_logger_factory = nullptr;
-    ReconnectMode m_client_reconnect_mode = ReconnectMode::normal;
-
     bool run_file_action(const SyncFileActionMetadata&);
 
     // Protects m_users
@@ -196,12 +233,8 @@ friend class SyncSession;
     std::unordered_map<std::string, std::shared_ptr<SyncUser>> m_admin_token_users;
 
     mutable std::unique_ptr<_impl::SyncClient> m_sync_client;
-    bool m_multiplex_sessions = false;
 
-    // Optional information about the binding/application that is sent as part of the User-Agent
-    // when establishing a connection to the server.
-    std::string m_user_agent_binding_info;
-    std::string m_user_agent_application_info;
+    SyncClientConfig m_config;
 
     // Protects m_file_manager and m_metadata_manager
     mutable std::mutex m_file_system_mutex;
@@ -216,6 +249,10 @@ friend class SyncSession;
     // inactive and have performed any necessary cleanup work.
     std::unordered_map<std::string, std::shared_ptr<SyncSession>> m_sessions;
 
+    // Internal method returning `true` if the SyncManager still contains sessions not yet fully closed.
+    // Callers of this method should hold the `m_session_mutex` themselves.
+    bool do_has_existing_sessions();
+
     // The unique identifier of this client.
     util::Optional<std::string> m_client_uuid;
 };
diff --git a/Pods/Realm/include/sync/sync_session.hpp b/Pods/Realm/include/sync/sync_session.hpp
index 0513729..f0755ef 100644
--- a/Pods/Realm/include/sync/sync_session.hpp
+++ b/Pods/Realm/include/sync/sync_session.hpp
@@ -136,17 +136,12 @@ class SyncSession : public std::enable_shared_from_this<SyncSession> {
 
     // Register a callback that will be called when all pending uploads have completed.
     // The callback is run asynchronously, and upon whatever thread the underlying sync client
-    // chooses to run it on. The method returns immediately with true if the callback was
-    // successfully registered, false otherwise. If the method returns false the callback will
-    // never be run.
-    // This method will return true if the completion handler was registered, either immediately
-    // or placed in a queue. If it returns true the completion handler will always be called
-    // at least once, except in the case where a logged-out session is never logged back in.
-    bool wait_for_upload_completion(std::function<void(std::error_code)> callback);
+    // chooses to run it on.
+    void wait_for_upload_completion(std::function<void(std::error_code)> callback);
 
     // Register a callback that will be called when all pending downloads have been completed.
     // Works the same way as `wait_for_upload_completion()`.
-    bool wait_for_download_completion(std::function<void(std::error_code)> callback);
+    void wait_for_download_completion(std::function<void(std::error_code)> callback);
 
     using NotifierType = _impl::SyncProgressNotifier::NotifierType;
     // Register a notifier that updates the app regarding progress.
@@ -213,6 +208,13 @@ class SyncSession : public std::enable_shared_from_this<SyncSession> {
     // not make the session reconnect.
     void set_multiplex_identifier(std::string multiplex_identity);
 
+    // See SyncConfig::url_prefix
+    //
+    // This method allows to override this value after the session is created but before it is bound
+    // because of Realm Cloud's token refresh service returning the sync worker ingress path with the token response.
+    // Prefer using the SyncConfig field in all other cases.
+    void set_url_prefix(std::string url_prefix);
+
     // Inform the sync session that it should close.
     void close();
 
@@ -227,6 +229,11 @@ class SyncSession : public std::enable_shared_from_this<SyncSession> {
     // object store team before using it.
     void override_server(std::string address, int port);
 
+    // Update the sync configuration used for this session. The new configuration must have the
+    // same user and reference realm url as the old configuration. The session will immediately
+    // disconnect (if it was active), and then attempt to connect using the new configuration.
+    void update_configuration(SyncConfig new_config);
+
     // An object representing the user who owns the Realm this `SyncSession` represents.
     std::shared_ptr<SyncUser> user() const
     {
@@ -310,24 +317,25 @@ class SyncSession : public std::enable_shared_from_this<SyncSession> {
 
     friend class realm::SyncManager;
     // Called by SyncManager {
-    static std::shared_ptr<SyncSession> create(_impl::SyncClient& client, std::string realm_path, SyncConfig config)
+    static std::shared_ptr<SyncSession> create(_impl::SyncClient& client, std::string realm_path,
+                                               SyncConfig config, bool force_client_resync)
     {
         struct MakeSharedEnabler : public SyncSession {
-            MakeSharedEnabler(_impl::SyncClient& client, std::string realm_path, SyncConfig config)
-            : SyncSession(client, std::move(realm_path), std::move(config))
+            MakeSharedEnabler(_impl::SyncClient& client, std::string realm_path, SyncConfig config, bool force_client_resync)
+            : SyncSession(client, std::move(realm_path), std::move(config), force_client_resync)
             {}
         };
-        return std::make_shared<MakeSharedEnabler>(client, std::move(realm_path), std::move(config));
+        return std::make_shared<MakeSharedEnabler>(client, std::move(realm_path), std::move(config), force_client_resync);
     }
     // }
 
-    SyncSession(_impl::SyncClient&, std::string realm_path, SyncConfig);
+    SyncSession(_impl::SyncClient&, std::string realm_path, SyncConfig, bool force_client_resync);
 
     void handle_error(SyncError);
-    void cancel_pending_waits(std::unique_lock<std::mutex>&);
+    void cancel_pending_waits(std::unique_lock<std::mutex>&, std::error_code);
     enum class ShouldBackup { yes, no };
     void update_error_and_mark_file_for_deletion(SyncError&, ShouldBackup);
-    static std::string get_recovery_file_path();
+    std::string get_recovery_file_path();
     void handle_progress_update(uint64_t, uint64_t, uint64_t, uint64_t, uint64_t, uint64_t);
 
     void set_sync_transact_callback(std::function<SyncSessionTransactCallback>);
@@ -341,6 +349,8 @@ class SyncSession : public std::enable_shared_from_this<SyncSession> {
     void unregister(std::unique_lock<std::mutex>& lock);
     void did_drop_external_reference();
 
+    void add_completion_callback(_impl::SyncProgressNotifier::NotifierType direction);
+
     std::function<SyncSessionTransactCallback> m_sync_transact_callback;
 
     mutable std::mutex m_state_mutex;
@@ -350,20 +360,20 @@ class SyncSession : public std::enable_shared_from_this<SyncSession> {
     // The underlying state of the connection. Even when sharing connections, the underlying session
     // will always start out as diconnected and then immediately transition to the correct state when calling
     // bind().
-    sync::Session::ConnectionState m_connection_state = sync::Session::ConnectionState::disconnected;
+    ConnectionState m_connection_state = ConnectionState::Disconnected;
     size_t m_death_count = 0;
 
     SyncConfig m_config;
+    bool m_force_client_resync;
 
     std::string m_realm_path;
     _impl::SyncClient& m_client;
 
-    // For storing wait-for-completion requests if the session isn't yet ready to handle them.
-    struct CompletionWaitPackage {
-        void(sync::Session::*waiter)(std::function<void(std::error_code)>);
-        std::function<void(std::error_code)> callback;
-    };
-    std::vector<CompletionWaitPackage> m_completion_wait_packages;
+    std::vector<std::function<void(std::error_code)>> m_download_completion_callbacks;
+    std::vector<std::function<void(std::error_code)>> m_upload_completion_callbacks;
+    // How many times a client resync has occurred. Used to discard session
+    // completion notifications from before the most recent client resync.
+    int m_client_resync_counter = 0;
 
     struct ServerOverride {
         std::string address;
diff --git a/Pods/Realm/include/thread_safe_reference.hpp b/Pods/Realm/include/thread_safe_reference.hpp
index ca3cc19..b1a8255 100644
--- a/Pods/Realm/include/thread_safe_reference.hpp
+++ b/Pods/Realm/include/thread_safe_reference.hpp
@@ -19,7 +19,6 @@
 #ifndef REALM_THREAD_SAFE_REFERENCE_HPP
 #define REALM_THREAD_SAFE_REFERENCE_HPP
 
-
 #include <realm/group_shared.hpp>
 
 namespace realm {
@@ -32,6 +31,7 @@ class Results;
 class TableView;
 template<typename T> class BasicRow;
 typedef BasicRow<Table> Row;
+namespace _impl { class RealmCoordinator; }
 
 // Opaque type representing an object for handover
 class ThreadSafeReferenceBase {
@@ -108,6 +108,24 @@ class ThreadSafeReference<Results>: public ThreadSafeReferenceBase {
     // Precondition: Realm and handover are on same version.
     Results import_into_realm(std::shared_ptr<Realm> realm) &&;
 };
+
+template<>
+class ThreadSafeReference<Realm> {
+    friend class Realm;
+    friend class _impl::RealmCoordinator;
+
+    std::shared_ptr<Realm> m_realm;
+
+    ThreadSafeReference(std::shared_ptr<Realm>);
+    std::shared_ptr<Realm> resolve() &&;
+public:
+
+    ThreadSafeReference() = default;
+    ThreadSafeReference(ThreadSafeReference const&) = delete;
+    ThreadSafeReference(ThreadSafeReference &&) = default;
+    ThreadSafeReference& operator=(ThreadSafeReference const&) = delete;
+    ThreadSafeReference& operator=(ThreadSafeReference&&) = default;
+};
 }
 
 #endif /* REALM_THREAD_SAFE_REFERENCE_HPP */
diff --git a/Pods/Realm/include/util/event_loop_dispatcher.hpp b/Pods/Realm/include/util/event_loop_dispatcher.hpp
new file mode 100644
index 0000000..342c34d
--- /dev/null
+++ b/Pods/Realm/include/util/event_loop_dispatcher.hpp
@@ -0,0 +1,111 @@
+////////////////////////////////////////////////////////////////////////////
+//
+// Copyright 2019 Realm Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+////////////////////////////////////////////////////////////////////////////
+
+#ifndef REALM_OS_UTIL_EVENT_LOOP_DISPATCHER_HPP
+#define REALM_OS_UTIL_EVENT_LOOP_DISPATCHER_HPP
+
+#include "util/event_loop_signal.hpp"
+
+#include <mutex>
+#include <queue>
+#include <tuple>
+
+namespace realm {
+// FIXME: remove once we switch to C++ 17 where we can use std::apply
+namespace _apply_polyfill {
+template <class Tuple, class F, size_t... Is>
+constexpr auto apply_impl(Tuple&& t, F f, std::index_sequence<Is...>) {
+    return f(std::get<Is>(std::forward<Tuple>(t))...);
+}
+
+template <class Tuple, class F>
+constexpr auto apply(Tuple&& t, F f) {
+    return apply_impl(std::forward<Tuple>(t), f, std::make_index_sequence<std::tuple_size<Tuple>{}>{});
+}
+}
+
+namespace util {
+template <class F>
+class EventLoopDispatcher;
+
+template <typename... Args>
+class EventLoopDispatcher<void(Args...)> {
+    using Tuple = std::tuple<typename std::remove_reference<Args>::type...>;
+private:
+    struct Callback;
+
+    struct State {
+    public:
+        State(std::function<void(Args...)> func)
+        : m_func(std::move(func))
+        {
+        }
+
+        const std::function<void(Args...)> m_func;
+        std::queue<Tuple> m_invocations;
+        std::mutex m_mutex;
+        std::shared_ptr<EventLoopSignal<Callback>> m_signal;
+    };
+    const std::shared_ptr<State> m_state;
+
+    struct Callback {
+        void operator()()
+        {
+            std::unique_lock<std::mutex> lock(m_state->m_mutex);
+            while (!m_state->m_invocations.empty()) {
+                auto& tuple = m_state->m_invocations.front();
+                _apply_polyfill::apply(std::move(tuple), m_state->m_func);
+                m_state->m_invocations.pop();
+            }
+            m_state->m_signal.reset();
+        }
+
+        std::shared_ptr<State> m_state;
+    };
+    const std::shared_ptr<EventLoopSignal<Callback>> m_signal;
+    const std::thread::id m_thread = std::this_thread::get_id();
+
+public:
+    EventLoopDispatcher(std::function<void(Args...)> func)
+    : m_state(std::make_shared<State>(func))
+    , m_signal(std::make_shared<EventLoopSignal<Callback>>(Callback{m_state}))
+    {
+    }
+
+    const std::function<void(Args...)>& func() const { return m_state->m_func; }
+
+    void operator()(Args... args)
+    {
+        if (m_thread == std::this_thread::get_id()) {
+            m_state->m_func(std::forward<Args>(args)...);
+            return;
+        }
+
+        {
+            std::unique_lock<std::mutex> lock(m_state->m_mutex);
+            m_state->m_signal = m_signal;
+            m_state->m_invocations.push(std::make_tuple(std::forward<Args>(args)...));
+        }
+        m_signal->notify();
+    }
+};
+} // namespace util
+} // namespace realm
+
+#endif
+
diff --git a/Pods/RealmSwift/README.md b/Pods/RealmSwift/README.md
index ae255b2..d111286 100644
--- a/Pods/RealmSwift/README.md
+++ b/Pods/RealmSwift/README.md
@@ -19,19 +19,18 @@ Please see the detailed instructions in our docs to add [Realm Objective-C](http
 ### Realm Objective-C
 
 The documentation can be found at [realm.io/docs/objc/latest](https://realm.io/docs/objc/latest).  
-The API reference is located at [realm.io/docs/objc/latest/api](https://realm.io/docs/objc/latest/api).
+The API reference is located at [realm.io/docs/objc/latest/api/](https://realm.io/docs/objc/latest/api/).
 
 ### Realm Swift
 
 The documentation can be found at [realm.io/docs/swift/latest](https://realm.io/docs/swift/latest).  
-The API reference is located at [realm.io/docs/swift/latest/api](https://realm.io/docs/swift/latest/api).
+The API reference is located at [realm.io/docs/swift/latest/api/](https://realm.io/docs/swift/latest/api/).
 
 ## Getting Help
 
-- **Need help with your code?**: Look for previous questions on the  [#realm tag](https://stackoverflow.com/questions/tagged/realm?sort=newest) — or [ask a new question](https://stackoverflow.com/questions/ask?tags=realm). We actively monitor & answer questions on SO!
-- **Have a bug to report?** [Open an issue](https://github.com/realm/realm-cocoa/issues/new). If possible, include the version of Realm, a full log, the Realm file, and a project that shows the issue.
-- **Have a feature request?** [Open an issue](https://github.com/realm/realm-cocoa/issues/new). Tell us what the feature should do, and why you want the feature.
-- Sign up for our [**Community Newsletter**](https://realm.io/realm-news-subscribe) to get regular tips, learn about other use-cases and get alerted of blogposts and tutorials about Realm.
+- **Need help with your code?**: Look for previous questions with the[`realm` tag](https://stackoverflow.com/questions/tagged/realm?sort=newest) on Stack Overflow or [ask a new question](https://stackoverflow.com/questions/ask?tags=realm). For general discussion that might be considered too broad for Stack Overflow, use the [Realm Forums](https://forums.realm.io).
+- **Have a bug to report?** [Open a GitHub issue](https://github.com/realm/realm-cocoa/issues/new). If possible, include the version of Realm, a full log, the Realm file, and a project that shows the issue.
+- **Have a feature request?** [Open a GitHub issue](https://github.com/realm/realm-cocoa/issues/new). Tell us what the feature should do and why you want the feature.
 
 ## Building Realm
 
diff --git a/Pods/RealmSwift/RealmSwift/Aliases.swift b/Pods/RealmSwift/RealmSwift/Aliases.swift
index 3437e5c..493fcf9 100644
--- a/Pods/RealmSwift/RealmSwift/Aliases.swift
+++ b/Pods/RealmSwift/RealmSwift/Aliases.swift
@@ -55,8 +55,3 @@ public typealias PropertyType = RLMPropertyType
  - see: `Realm.observe(_:)`
  */
 public typealias NotificationToken = RLMNotificationToken
-
-extension NotificationToken {
-    @available(*, unavailable, renamed: "invalidate()")
-    @nonobjc public func stop() { fatalError() }
-}
diff --git a/Pods/RealmSwift/RealmSwift/LinkingObjects.swift b/Pods/RealmSwift/RealmSwift/LinkingObjects.swift
index 962415f..1906d0c 100644
--- a/Pods/RealmSwift/RealmSwift/LinkingObjects.swift
+++ b/Pods/RealmSwift/RealmSwift/LinkingObjects.swift
@@ -19,44 +19,6 @@
 import Foundation
 import Realm
 
-/// :nodoc:
-/// Internal class. Do not use directly. Used for reflection and initialization
-public class LinkingObjectsBase: NSObject, NSFastEnumeration {
-    internal let objectClassName: String
-    internal let propertyName: String
-
-    fileprivate var cachedRLMResults: RLMResults<AnyObject>?
-    @objc fileprivate var object: RLMWeakObjectHandle?
-    @objc fileprivate var property: RLMProperty?
-
-    internal var rlmResults: RLMResults<AnyObject> {
-        if cachedRLMResults == nil {
-            if let object = self.object, let property = self.property {
-                cachedRLMResults = RLMDynamicGet(object.object, property)! as? RLMResults
-                self.object = nil
-                self.property = nil
-            } else {
-                cachedRLMResults = RLMResults.emptyDetached()
-            }
-        }
-        return cachedRLMResults!
-    }
-
-    init(fromClassName objectClassName: String, property propertyName: String) {
-        self.objectClassName = objectClassName
-        self.propertyName = propertyName
-    }
-
-    // MARK: Fast Enumeration
-    public func countByEnumerating(with state: UnsafeMutablePointer<NSFastEnumerationState>,
-                                   objects buffer: AutoreleasingUnsafeMutablePointer<AnyObject?>,
-                                   count len: Int) -> Int {
-        return Int(rlmResults.countByEnumerating(with: state,
-                                                 objects: buffer,
-                                                 count: UInt(len)))
-    }
-}
-
 /**
  `LinkingObjects` is an auto-updating container type. It represents zero or more objects that are linked to its owning
  model object through a property relationship.
@@ -71,7 +33,7 @@ public class LinkingObjectsBase: NSObject, NSFastEnumeration {
  `LinkingObjects` can only be used as a property on `Object` models. Properties of this type must be declared as `let`
  and cannot be `dynamic`.
  */
-public final class LinkingObjects<Element: Object>: LinkingObjectsBase {
+public struct LinkingObjects<Element: Object> {
     /// The type of the objects represented by the linking objects.
     public typealias ElementType = Element
 
@@ -99,17 +61,16 @@ public final class LinkingObjects<Element: Object>: LinkingObjectsBase {
      - parameter type:         The type of the object owning the property the linking objects should refer to.
      - parameter propertyName: The property name of the property the linking objects should refer to.
      */
-    public init(fromType type: Element.Type, property propertyName: String) {
-        let className = (Element.self as Object.Type).className()
-        super.init(fromClassName: className, property: propertyName)
+    public init(fromType _: Element.Type, property propertyName: String) {
+        self.propertyName = propertyName
     }
 
     /// A human-readable description of the objects represented by the linking objects.
-    public override var description: String {
+    public var description: String {
         if realm == nil {
             var this = self
             return withUnsafePointer(to: &this) {
-                return "LinkingObjects<\(objectClassName)> <\($0)> (\n\n)"
+                return "LinkingObjects<\(Element.className())> <\($0)> (\n\n)"
             }
         }
         return RLMDescriptionWithMaxDepth("LinkingObjects", rlmResults, RLMDescriptionMaxDepth)
@@ -170,7 +131,7 @@ public final class LinkingObjects<Element: Object>: LinkingObjectsBase {
 
      - parameter key: The name of the property whose values are desired.
      */
-    public override func value(forKey key: String) -> Any? {
+    public func value(forKey key: String) -> Any? {
         return value(forKeyPath: key)
     }
 
@@ -180,7 +141,7 @@ public final class LinkingObjects<Element: Object>: LinkingObjectsBase {
 
      - parameter keyPath: The key path to the property whose values are desired.
      */
-    public override func value(forKeyPath keyPath: String) -> Any? {
+    public func value(forKeyPath keyPath: String) -> Any? {
         return rlmResults.value(forKeyPath: keyPath)
     }
 
@@ -192,7 +153,7 @@ public final class LinkingObjects<Element: Object>: LinkingObjectsBase {
      - parameter value: The value to set the property to.
      - parameter key:   The name of the property whose value should be set on each object.
      */
-    public override func setValue(_ value: Any?, forKey key: String) {
+    public func setValue(_ value: Any?, forKey key: String) {
         return rlmResults.setValue(value, forKeyPath: key)
     }
 
@@ -362,6 +323,13 @@ public final class LinkingObjects<Element: Object>: LinkingObjectsBase {
             block(RealmCollectionChange.fromObjc(value: self, change: change, error: error))
         }
     }
+
+    internal var rlmResults: RLMResults<AnyObject> {
+        return handle?.results ?? RLMResults<AnyObject>.emptyDetached()
+    }
+
+    internal var propertyName: String
+    internal var handle: RLMLinkingObjectsHandle?
 }
 
 extension LinkingObjects: RealmCollection {
@@ -372,6 +340,12 @@ extension LinkingObjects: RealmCollection {
         return RLMIterator(collection: rlmResults)
     }
 
+    /// :nodoc:
+    // swiftlint:disable:next identifier_name
+    public func _asNSFastEnumerator() -> Any {
+        return rlmResults
+    }
+
     // MARK: Collection Support
 
     /// The position of the first element in a non-empty collection.
@@ -405,40 +379,15 @@ extension LinkingObjects: RealmCollection {
 
 extension LinkingObjects: AssistedObjectiveCBridgeable {
     internal static func bridging(from objectiveCValue: Any, with metadata: Any?) -> LinkingObjects {
-        guard let metadata = metadata as? LinkingObjectsBridgingMetadata else { preconditionFailure() }
-
-        let swiftValue = LinkingObjects(fromType: Element.self, property: metadata.propertyName)
-        switch (objectiveCValue, metadata) {
-        case (let object as RLMObjectBase, .uncached(let property)):
-            swiftValue.object = RLMWeakObjectHandle(object: object)
-            swiftValue.property = property
-        case (let results as RLMResults<AnyObject>, .cached):
-            swiftValue.cachedRLMResults = results
-        default:
-            preconditionFailure()
-        }
-        return swiftValue
-    }
+        guard let object = objectiveCValue as? RLMObjectBase else { preconditionFailure() }
+        guard let propertyName = metadata as? String else { preconditionFailure() }
 
-    internal var bridged: (objectiveCValue: Any, metadata: Any?) {
-        if let results = cachedRLMResults {
-            return (objectiveCValue: results,
-                    metadata: LinkingObjectsBridgingMetadata.cached(propertyName: propertyName))
-        } else {
-            return (objectiveCValue: (object!.copy() as! RLMWeakObjectHandle).object,
-                    metadata: LinkingObjectsBridgingMetadata.uncached(property: property!))
-        }
+        var ret = LinkingObjects(fromType: Element.self, property: propertyName)
+        ret.handle = RLMLinkingObjectsHandle(object: object, property: RLMObjectBaseObjectSchema(object)![propertyName]!)
+        return ret
     }
-}
 
-internal enum LinkingObjectsBridgingMetadata {
-    case uncached(property: RLMProperty)
-    case cached(propertyName: String)
-
-    fileprivate var propertyName: String {
-        switch self {
-        case .uncached(let property):   return property.name
-        case .cached(let propertyName): return propertyName
-        }
+    internal var bridged: (objectiveCValue: Any, metadata: Any?) {
+        return (objectiveCValue: handle!.parent, metadata: handle!.property.name)
     }
 }
diff --git a/Pods/RealmSwift/RealmSwift/List.swift b/Pods/RealmSwift/RealmSwift/List.swift
index 3b4f9d1..81e5899 100644
--- a/Pods/RealmSwift/RealmSwift/List.swift
+++ b/Pods/RealmSwift/RealmSwift/List.swift
@@ -69,7 +69,7 @@ public final class List<Element: RealmCollectionValue>: ListBase {
 
     /// Creates a `List` that holds Realm model objects of type `Element`.
     public override init() {
-        super.init(array: Element._rlmArray())
+        super.init()
     }
 
     internal init(rlmArray: RLMArray<AnyObject>) {
@@ -438,6 +438,11 @@ public final class List<Element: RealmCollectionValue>: ListBase {
             block(RealmCollectionChange.fromObjc(value: self, change: change, error: error))
         }
     }
+
+    // swiftlint:disable:next identifier_name
+    @objc class func _unmanagedArray() -> RLMArray<AnyObject> {
+        return Element._rlmArray()
+    }
 }
 
 extension List where Element: MinMaxType {
@@ -483,6 +488,12 @@ extension List: RealmCollection {
         return RLMIterator(collection: _rlmArray)
     }
 
+    /// :nodoc:
+    // swiftlint:disable:next identifier_name
+    public func _asNSFastEnumerator() -> Any {
+        return _rlmArray
+    }
+
 #if swift(>=4)
     /**
      Replace the given `subRange` of elements with `newElements`.
@@ -576,7 +587,6 @@ extension List: MutableCollection {
         guard number <= count else {
             throwRealmException("It is not possible to remove more objects (\(number)) from a list"
                 + " than it already contains (\(count)).")
-            return
         }
         for _ in 0..<number {
             _rlmArray.removeObject(at: 0)
@@ -594,7 +604,6 @@ extension List: MutableCollection {
         guard number <= count else {
             throwRealmException("It is not possible to remove more objects (\(number)) from a list"
                 + " than it already contains (\(count)).")
-            return
         }
         for _ in 0..<number {
             _rlmArray.removeLastObject()
@@ -705,19 +714,29 @@ extension List: RangeReplaceableCollection {
         _rlmArray.removeLastObject()
     }
 
-#if swift(>=3.2)
-    // The issue described below is fixed in Swift 3.2 and above.
-#else
-    // These should not be necessary, but Swift 3.1's compiler fails to infer the `SubSequence`,
-    // and the standard library neglects to provide the default implementation of `subscript`
-    /// :nodoc:
-    public typealias SubSequence = RangeReplaceableRandomAccessSlice<List>
+}
+#endif
 
-    /// :nodoc:
-    public subscript(slice: Range<Int>) -> SubSequence {
-        return SubSequence(base: self, bounds: slice)
+// MARK: - Codable
+
+#if swift(>=4.1)
+extension List: Decodable where Element: Decodable {
+    public convenience init(from decoder: Decoder) throws {
+        self.init()
+        var container = try decoder.unkeyedContainer()
+        while !container.isAtEnd {
+            append(try container.decode(Element.self))
+        }
+    }
+}
+
+extension List: Encodable where Element: Encodable {
+    public func encode(to encoder: Encoder) throws {
+        var container = encoder.unkeyedContainer()
+        for value in self {
+            try container.encode(value)
+        }
     }
-#endif
 }
 #endif
 
@@ -733,9 +752,3 @@ extension List: AssistedObjectiveCBridgeable {
         return (objectiveCValue: _rlmArray, metadata: nil)
     }
 }
-// MARK: - Unavailable
-
-extension List {
-    @available(*, unavailable, renamed: "remove(at:)")
-    public func remove(objectAtIndex: Int) { fatalError() }
-}
diff --git a/Pods/RealmSwift/RealmSwift/Object.swift b/Pods/RealmSwift/RealmSwift/Object.swift
index 86b8a62..4d29ab5 100644
--- a/Pods/RealmSwift/RealmSwift/Object.swift
+++ b/Pods/RealmSwift/RealmSwift/Object.swift
@@ -44,14 +44,15 @@ import Realm.Private
  - `Bool`
  - `Date`, `NSDate`
  - `Data`, `NSData`
+ - `@objc enum` which has been delcared as conforming to `RealmEnum`.
  - `RealmOptional<Value>` for optional numeric properties
  - `Object` subclasses, to model many-to-one relationships
  - `List<Element>`, to model many-to-many relationships
 
  `String`, `NSString`, `Date`, `NSDate`, `Data`, `NSData` and `Object` subclass properties can be declared as optional.
- `Int`, `Int8`, `Int16`, `Int32`, `Int64`, `Float`, `Double`, `Bool`, and `List` properties cannot. To store an optional
- number, use `RealmOptional<Int>`, `RealmOptional<Float>`, `RealmOptional<Double>`, or `RealmOptional<Bool>` instead,
- which wraps an optional numeric value.
+ `Int`, `Int8`, `Int16`, `Int32`, `Int64`, `Float`, `Double`, `Bool`,  enum, and `List` properties cannot.
+ To store an optional number, use `RealmOptional<Int>`, `RealmOptional<Float>`, `RealmOptional<Double>`, or
+ `RealmOptional<Bool>` instead, which wraps an optional numeric value. Lists cannot be optional at all.
 
  All property types except for `List` and `RealmOptional` *must* be declared as `@objc dynamic var`. `List` and
  `RealmOptional` properties must be declared as non-dynamic `let` properties. Swift `lazy` properties are not allowed.
@@ -101,8 +102,9 @@ open class Object: RLMObjectBase, ThreadConfined, RealmCollectionValue {
 
      - parameter value:  The value used to populate the object.
      */
-    public init(value: Any) {
-        super.init(value: value, schema: .partialPrivateShared())
+    public convenience init(value: Any) {
+        self.init()
+        RLMInitializeWithValue(self, value, .partialPrivateShared())
     }
 
 
@@ -135,11 +137,10 @@ open class Object: RLMObjectBase, ThreadConfined, RealmCollectionValue {
      It is not considered part of the public API.
      :nodoc:
      */
-    public override final class func objectUtilClass(_ isSwift: Bool) -> AnyClass {
-        return ObjectUtil.self
+    public override final class func _getProperties(withInstance instance: Any) -> [RLMProperty] {
+        return ObjectUtil.getSwiftProperties(instance as! RLMObjectBase)
     }
 
-
     // MARK: Object Customization
 
     /**
@@ -178,7 +179,7 @@ open class Object: RLMObjectBase, ThreadConfined, RealmCollectionValue {
             if realm == nil {
                 return value(forKey: key)
             }
-            return RLMDynamicGetByName(self, key, true)
+            return dynamicGet(key: key)
         }
         set(value) {
             if realm == nil {
@@ -189,6 +190,20 @@ open class Object: RLMObjectBase, ThreadConfined, RealmCollectionValue {
         }
     }
 
+    private func dynamicGet(key: String) -> Any? {
+        let objectSchema = RLMObjectBaseObjectSchema(self)!
+        guard let prop = objectSchema[key] else {
+            throwRealmException("Invalid property name '\(key) for class \(objectSchema.className)")
+        }
+        if let accessor = prop.swiftAccessor {
+            return accessor.get(Unmanaged.passUnretained(self).toOpaque() + ivar_getOffset(prop.swiftIvar!))
+        }
+        if let ivar = prop.swiftIvar, prop.array {
+            return object_getIvar(self, ivar)
+        }
+        return RLMDynamicGet(self, prop)
+    }
+
     // MARK: Notifications
 
     /**
@@ -259,7 +274,7 @@ open class Object: RLMObjectBase, ThreadConfined, RealmCollectionValue {
      :nodoc:
      */
     public func dynamicList(_ propertyName: String) -> List<DynamicObject> {
-        return noWarnUnsafeBitCast(RLMDynamicGetByName(self, propertyName, true) as! RLMListBase,
+        return noWarnUnsafeBitCast(dynamicGet(key: propertyName) as! RLMListBase,
                                    to: List<DynamicObject>.self)
     }
 
@@ -269,7 +284,7 @@ open class Object: RLMObjectBase, ThreadConfined, RealmCollectionValue {
 
      Objects are considered the same if and only if they are both managed by the same
      Realm and point to the same underlying object in the database.
-     
+
      - note: Equality comparison is implemented by `isEqual(_:)`. If the object type
              is defined with a primary key, `isEqual(_:)` behaves identically to this
              method. If the object type is not defined with a primary key,
@@ -282,26 +297,6 @@ open class Object: RLMObjectBase, ThreadConfined, RealmCollectionValue {
     public func isSameObject(as object: Object?) -> Bool {
         return RLMObjectBaseAreEqual(self, object)
     }
-
-    // MARK: Private functions
-
-    // FIXME: None of these functions should be exposed in the public interface.
-
-    /**
-    WARNING: This is an internal initializer not intended for public use.
-    :nodoc:
-    */
-    public override required init(realm: RLMRealm, schema: RLMObjectSchema) {
-        super.init(realm: realm, schema: schema)
-    }
-
-    /**
-    WARNING: This is an internal initializer not intended for public use.
-    :nodoc:
-    */
-    public override required init(value: Any, schema: RLMSchema) {
-        super.init(value: value, schema: schema)
-    }
 }
 
 /**
@@ -359,7 +354,7 @@ public enum ObjectChange {
 public final class DynamicObject: Object {
     public override subscript(key: String) -> Any? {
         get {
-            let value = RLMDynamicGetByName(self, key, false)
+            let value = RLMDynamicGetByName(self, key)
             if let array = value as? RLMArray<AnyObject> {
                 return List<DynamicObject>(rlmArray: array)
             }
@@ -391,31 +386,261 @@ public final class DynamicObject: Object {
     }
 }
 
+/**
+ An enum type which can be stored on a Realm Object.
+
+ Only `@objc` enums backed by an Int can be stored on a Realm object, and the
+ enum type must explicitly conform to this protocol. For example:
+
+ ```
+ @objc enum class MyEnum: Int, RealmEnum {
+    case first = 1
+    case second = 2
+    case third = 7
+ }
+
+ class MyModel: Object {
+    @objc dynamic enumProperty = MyEnum.first
+    let optionalEnumProperty = RealmOptional<MyEnum>()
+ }
+ ```
+ */
+public protocol RealmEnum: RealmOptionalType, _ManagedPropertyType {
+    /// :nodoc:
+    // swiftlint:disable:next identifier_name
+    static func _rlmToRawValue(_ value: Any) -> Any
+    /// :nodoc:
+    // swiftlint:disable:next identifier_name
+    static func _rlmFromRawValue(_ value: Any) -> Any
+}
+
+// MARK: - Implementation
+
 /// :nodoc:
-/// Internal class. Do not use directly.
-@objc(RealmSwiftObjectUtil)
-public class ObjectUtil: NSObject {
-    @objc private class func swiftVersion() -> NSString {
-        return swiftLanguageVersion as NSString
+public extension RealmEnum where Self: RawRepresentable, Self.RawValue: _ManagedPropertyType {
+    // swiftlint:disable:next identifier_name
+    static func _rlmToRawValue(_ value: Any) -> Any {
+        return (value as! Self).rawValue
+    }
+    // swiftlint:disable:next identifier_name
+    static func _rlmFromRawValue(_ value: Any) -> Any {
+        return Self.init(rawValue: value as! RawValue)!
     }
+    // swiftlint:disable:next identifier_name
+    static func _rlmProperty(_ prop: RLMProperty) {
+        RawValue._rlmProperty(prop)
+    }
+}
 
-    @objc private class func ignoredPropertiesForClass(_ type: AnyClass) -> NSArray? {
-        if let type = type as? Object.Type {
-            return type.ignoredProperties() as NSArray?
-        }
-        return nil
+// A type which can be a managed property on a Realm object
+/// :nodoc:
+public protocol _ManagedPropertyType {
+    // swiftlint:disable:next identifier_name
+    func _rlmProperty(_ prop: RLMProperty)
+    // swiftlint:disable:next identifier_name
+    static func _rlmProperty(_ prop: RLMProperty)
+    // swiftlint:disable:next identifier_name
+    static func _rlmRequireObjc() -> Bool
+}
+/// :nodoc:
+extension _ManagedPropertyType {
+    // swiftlint:disable:next identifier_name
+    public func _rlmProperty(_ prop: RLMProperty) { }
+    // swiftlint:disable:next identifier_name
+    public static func _rlmRequireObjc() -> Bool { return true }
+}
+
+/// :nodoc:
+extension Int: _ManagedPropertyType {
+    // swiftlint:disable:next identifier_name
+    public static func _rlmProperty(_ prop: RLMProperty) {
+        prop.type = .int
+    }
+}
+/// :nodoc:
+extension Int8: _ManagedPropertyType {
+    // swiftlint:disable:next identifier_name
+    public static func _rlmProperty(_ prop: RLMProperty) {
+        prop.type = .int
+    }
+}
+/// :nodoc:
+extension Int16: _ManagedPropertyType {
+    // swiftlint:disable:next identifier_name
+    public static func _rlmProperty(_ prop: RLMProperty) {
+        prop.type = .int
+    }
+}
+/// :nodoc:
+extension Int32: _ManagedPropertyType {
+    // swiftlint:disable:next identifier_name
+    public static func _rlmProperty(_ prop: RLMProperty) {
+        prop.type = .int
+    }
+}
+/// :nodoc:
+extension Int64: _ManagedPropertyType {
+    // swiftlint:disable:next identifier_name
+    public static func _rlmProperty(_ prop: RLMProperty) {
+        prop.type = .int
+    }
+}
+/// :nodoc:
+extension Float: _ManagedPropertyType {
+    // swiftlint:disable:next identifier_name
+    public static func _rlmProperty(_ prop: RLMProperty) {
+        prop.type = .float
+    }
+}
+/// :nodoc:
+extension Double: _ManagedPropertyType {
+    // swiftlint:disable:next identifier_name
+    public static func _rlmProperty(_ prop: RLMProperty) {
+        prop.type = .double
+    }
+}
+/// :nodoc:
+extension Bool: _ManagedPropertyType {
+    // swiftlint:disable:next identifier_name
+    public static func _rlmProperty(_ prop: RLMProperty) {
+        prop.type = .bool
+    }
+}
+/// :nodoc:
+extension String: _ManagedPropertyType {
+    // swiftlint:disable:next identifier_name
+    public static func _rlmProperty(_ prop: RLMProperty) {
+        prop.type = .string
+    }
+}
+/// :nodoc:
+extension NSString: _ManagedPropertyType {
+    // swiftlint:disable:next identifier_name
+    public static func _rlmProperty(_ prop: RLMProperty) {
+        prop.type = .string
+    }
+}
+/// :nodoc:
+extension Data: _ManagedPropertyType {
+    // swiftlint:disable:next identifier_name
+    public static func _rlmProperty(_ prop: RLMProperty) {
+        prop.type = .data
+    }
+}
+/// :nodoc:
+extension NSData: _ManagedPropertyType {
+    // swiftlint:disable:next identifier_name
+    public static func _rlmProperty(_ prop: RLMProperty) {
+        prop.type = .data
+    }
+}
+/// :nodoc:
+extension Date: _ManagedPropertyType {
+    // swiftlint:disable:next identifier_name
+    public static func _rlmProperty(_ prop: RLMProperty) {
+        prop.type = .date
     }
+}
+/// :nodoc:
+extension NSDate: _ManagedPropertyType {
+    // swiftlint:disable:next identifier_name
+    public static func _rlmProperty(_ prop: RLMProperty) {
+        prop.type = .date
+    }
+}
 
-    @objc private class func indexedPropertiesForClass(_ type: AnyClass) -> NSArray? {
-        if let type = type as? Object.Type {
-            return type.indexedProperties() as NSArray?
+/// :nodoc:
+extension Object: _ManagedPropertyType {
+    // swiftlint:disable:next identifier_name
+    public static func _rlmProperty(_ prop: RLMProperty) {
+        if !prop.optional && !prop.array {
+            throwRealmException("Object property '\(prop.name)' must be marked as optional.")
         }
-        return nil
+        if prop.optional && prop.array {
+            throwRealmException("List<\(className())> property '\(prop.name)' must not be marked as optional.")
+        }
+        prop.type = .object
+        prop.objectClassName = className()
     }
+}
 
-    @objc private class func linkingObjectsPropertiesForClass(_ type: AnyClass) -> NSDictionary? {
-        // Not used for Swift. getLinkingObjectsProperties(_:) is used instead.
-        return nil
+/// :nodoc:
+extension List: _ManagedPropertyType where Element: _ManagedPropertyType {
+    // swiftlint:disable:next identifier_name
+    public static func _rlmProperty(_ prop: RLMProperty) {
+        prop.array = true
+        Element._rlmProperty(prop)
+    }
+    // swiftlint:disable:next identifier_name
+    public static func _rlmRequireObjc() -> Bool { return false }
+}
+
+/// :nodoc:
+class LinkingObjectsAccessor<Element: Object>: RLMManagedPropertyAccessor {
+    @objc override class func initializeObject(_ ptr: UnsafeMutableRawPointer,
+                                               parent: RLMObjectBase, property: RLMProperty) {
+        ptr.assumingMemoryBound(to: LinkingObjects.self).pointee.handle = RLMLinkingObjectsHandle(object: parent, property: property)
+    }
+    @objc override class func get(_ ptr: UnsafeMutableRawPointer) -> Any {
+        return ptr.assumingMemoryBound(to: LinkingObjects<Element>.self).pointee
+    }
+}
+
+/// :nodoc:
+extension LinkingObjects: _ManagedPropertyType {
+    // swiftlint:disable:next identifier_name
+    public static func _rlmProperty(_ prop: RLMProperty) {
+        prop.array = true
+        prop.type = .linkingObjects
+        prop.objectClassName = Element.className()
+        prop.swiftAccessor = LinkingObjectsAccessor<Element>.self
+    }
+    // swiftlint:disable:next identifier_name
+    public func _rlmProperty(_ prop: RLMProperty) {
+        prop.linkOriginPropertyName = self.propertyName
+    }
+    // swiftlint:disable:next identifier_name
+    public static func _rlmRequireObjc() -> Bool { return false }
+}
+
+/// :nodoc:
+extension Optional: _ManagedPropertyType where Wrapped: _ManagedPropertyType {
+    // swiftlint:disable:next identifier_name
+    public static func _rlmProperty(_ prop: RLMProperty) {
+        prop.optional = true
+        Wrapped._rlmProperty(prop)
+    }
+}
+
+/// :nodoc:
+extension RealmOptional: _ManagedPropertyType where Value: _ManagedPropertyType {
+    // swiftlint:disable:next identifier_name
+    public static func _rlmProperty(_ prop: RLMProperty) {
+        prop.optional = true
+        Value._rlmProperty(prop)
+    }
+    // swiftlint:disable:next identifier_name
+    public static func _rlmRequireObjc() -> Bool { return false }
+}
+
+/// :nodoc:
+internal class ObjectUtil {
+    private static let runOnce: Void = {
+        RLMSwiftAsFastEnumeration = { (obj: Any) -> Any? in
+            // Intermediate cast to AnyObject due to https://bugs.swift.org/browse/SR-8651
+            if let collection = obj as AnyObject as? _RealmCollectionEnumerator {
+                return collection._asNSFastEnumerator()
+            }
+            return nil
+        }
+    }()
+
+    private class func swiftVersion() -> NSString {
+#if SWIFT_PACKAGE
+        return "5.1"
+#else
+        return swiftLanguageVersion as NSString
+#endif
     }
 
     // If the property is a storage property for a lazy Swift property, return
@@ -431,6 +656,12 @@ public class ObjectUtil: NSObject {
                 return name.substring(to: storageRange.lowerBound)
             #endif
         }
+        // Xcode 11 changed the name of the storage property to "$__lazy_storage_$_propName"
+        #if swift(>=4.0)
+            if let storageRange = name.range(of: "$__lazy_storage_$_", options: [.anchored]) {
+                return String(name[storageRange.upperBound...])
+            }
+        #endif
         return nil
     }
 
@@ -442,18 +673,15 @@ public class ObjectUtil: NSObject {
         } else {
             ignoredPropNames = Set()
         }
-        // No HKT in Swift, unfortunately
         return Mirror(reflecting: object).children.filter { (prop: Mirror.Child) -> Bool in
             guard let label = prop.label else {
                 return false
             }
             if ignoredPropNames.contains(label) {
-                // Ignored property.
                 return false
             }
             if let lazyBaseName = baseName(forLazySwiftProperty: label) {
                 if ignoredPropNames.contains(lazyBaseName) {
-                    // Ignored lazy property.
                     return false
                 }
                 // Managed lazy property; not currently supported.
@@ -465,64 +693,82 @@ public class ObjectUtil: NSObject {
         }
     }
 
-    // Build optional property metadata for a given property.
-    // swiftlint:disable:next cyclomatic_complexity
-    private static func getOptionalPropertyMetadata(for child: Mirror.Child, at index: Int) -> RLMSwiftPropertyMetadata? {
-        guard let name = child.label else {
-            return nil
-        }
-        let mirror = Mirror(reflecting: child.value)
-        let type = mirror.subjectType
-        let code: PropertyType
-        if type is Optional<String>.Type || type is Optional<NSString>.Type {
-            code = .string
-        } else if type is Optional<Date>.Type {
-            code = .date
-        } else if type is Optional<Data>.Type {
-            code = .data
-        } else if type is Optional<Object>.Type {
-            code = .object
-        } else if type is RealmOptional<Int>.Type ||
-            type is RealmOptional<Int8>.Type ||
-            type is RealmOptional<Int16>.Type ||
-            type is RealmOptional<Int32>.Type ||
-            type is RealmOptional<Int64>.Type {
-            code = .int
-        } else if type is RealmOptional<Float>.Type {
-            code = .float
-        } else if type is RealmOptional<Double>.Type {
-            code = .double
-        } else if type is RealmOptional<Bool>.Type {
-            code = .bool
-        } else if child.value is RLMOptionalBase {
-            throwRealmException("'\(type)' is not a valid RealmOptional type.")
-            code = .int // ignored
-        } else if mirror.displayStyle == .optional || type is ExpressibleByNilLiteral.Type {
-            return RLMSwiftPropertyMetadata(forNilLiteralOptionalProperty: name)
+    internal class func getSwiftProperties(_ object: RLMObjectBase) -> [RLMProperty] {
+        _ = ObjectUtil.runOnce
+
+        let cls = type(of: object)
+
+        var indexedProperties: Set<String>!
+        let columnNames = cls._realmColumnNames()
+        if let realmObject = object as? Object {
+            indexedProperties = Set(type(of: realmObject).indexedProperties())
         } else {
-            return nil
+            indexedProperties = Set()
         }
-        return RLMSwiftPropertyMetadata(forOptionalProperty: name, type: code)
-    }
-
-    @objc private class func getSwiftProperties(_ object: Any) -> [RLMSwiftPropertyMetadata] {
-        return getNonIgnoredMirrorChildren(for: object).enumerated().map { idx, prop in
-            if let value = prop.value as? LinkingObjectsBase {
-                return RLMSwiftPropertyMetadata(forLinkingObjectsProperty: prop.label!,
-                                                className: value.objectClassName,
-                                                linkedPropertyName: value.propertyName)
-            } else if prop.value is RLMListBase {
-                return RLMSwiftPropertyMetadata(forListProperty: prop.label!)
-            } else if let optional = getOptionalPropertyMetadata(for: prop, at: idx) {
-                return optional
+
+        return getNonIgnoredMirrorChildren(for: object).compactMap { prop in
+            guard let label = prop.label else { return nil }
+            var rawValue = prop.value
+            if let value = rawValue as? RealmEnum {
+                rawValue = type(of: value)._rlmToRawValue(value)
+            }
+
+            guard let value = rawValue as? _ManagedPropertyType else {
+                if class_getProperty(cls, label) != nil {
+                    throwRealmException("Property \(cls).\(label) is declared as \(type(of: prop.value)), which is not a supported managed Object property type. If it is not supposed to be a managed property, either add it to `ignoredProperties()` or do not declare it as `@objc dynamic`. See https://realm.io/docs/swift/latest/api/Classes/Object.html for more information.")
+                }
+                if prop.value as? RealmOptionalProtocol != nil {
+                    throwRealmException("Property \(cls).\(label) has unsupported RealmOptional type \(type(of: prop.value)). Extending RealmOptionalType with custom types is not currently supported. ")
+                }
+                return nil
+            }
+
+            RLMValidateSwiftPropertyName(label)
+            let valueType = type(of: value)
+
+            let property = RLMProperty()
+            property.name = label
+            property.indexed = indexedProperties.contains(label)
+            property.columnName = columnNames?[label]
+            valueType._rlmProperty(property)
+            value._rlmProperty(property)
+
+            if let objcProp = class_getProperty(cls, label) {
+                var count: UInt32 = 0
+                let attrs = property_copyAttributeList(objcProp, &count)!
+                var computed = true
+                for i in 0..<Int(count) {
+                    let attr = attrs[i]
+                    switch attr.name[0] {
+                    case Int8(UInt8(ascii: "R")): // Read only
+                        return nil
+                    case Int8(UInt8(ascii: "V")): // Ivar name
+                        computed = false
+                    case Int8(UInt8(ascii: "G")): // Getter name
+                        property.getterName = String(cString: attr.value)
+                    case Int8(UInt8(ascii: "S")): // Setter name
+                        property.setterName = String(cString: attr.value)
+                    default:
+                        break
+                    }
+                }
+
+                // If there's no ivar name and no ivar with the same name as
+                // the property then this is a computed property and we should
+                // implicitly ignore it
+                if computed && class_getInstanceVariable(cls, label) == nil {
+                    return nil
+                }
+            } else if valueType._rlmRequireObjc() {
+                // Implicitly ignore non-@objc dynamic properties
+                return nil
             } else {
-                return RLMSwiftPropertyMetadata(forOtherProperty: prop.label!)
+                property.swiftIvar = class_getInstanceVariable(cls, label)
             }
-        }
-    }
 
-    @objc private class func requiredPropertiesForClass(_: Any) -> [String] {
-        return []
+            property.updateAccessors()
+            return property
+        }
     }
 }
 
@@ -542,21 +788,3 @@ extension Object: AssistedObjectiveCBridgeable {
         return (objectiveCValue: unsafeCastToRLMObject(), metadata: nil)
     }
 }
-
-// MARK: - Migration assistance
-
-extension Object {
-    /// :nodoc:
-    @available(*, unavailable, renamed: "observe()")
-    public func addNotificationBlock(_ block: @escaping (ObjectChange) -> Void) -> NotificationToken {
-        fatalError()
-    }
-
-#if os(OSX)
-#else
-    /// :nodoc:
-    @available(*, unavailable, renamed: "isSameObject(as:)") public func isEqual(to object: Any?) -> Bool {
-        fatalError()
-    }
-#endif
-}
diff --git a/Pods/RealmSwift/RealmSwift/ObjectSchema.swift b/Pods/RealmSwift/RealmSwift/ObjectSchema.swift
index ce5b3b8..54fafcb 100644
--- a/Pods/RealmSwift/RealmSwift/ObjectSchema.swift
+++ b/Pods/RealmSwift/RealmSwift/ObjectSchema.swift
@@ -18,6 +18,7 @@
 
 import Foundation
 import Realm
+import Realm.Private
 
 /**
  This class represents Realm model object schemas.
@@ -44,6 +45,9 @@ public struct ObjectSchema: CustomStringConvertible {
     /// The name of the class the schema describes.
     public var className: String { return rlmObjectSchema.className }
 
+    /// The object class the schema describes.
+    public var objectClass: AnyClass { return rlmObjectSchema.objectClass }
+
     /// The property which serves as the primary key for the class the schema describes, if any.
     public var primaryKeyProperty: Property? {
         if let rlmProperty = rlmObjectSchema.primaryKeyProperty {
diff --git a/Pods/RealmSwift/RealmSwift/ObjectiveCSupport+Sync.swift b/Pods/RealmSwift/RealmSwift/ObjectiveCSupport+Sync.swift
new file mode 100644
index 0000000..ac230c4
--- /dev/null
+++ b/Pods/RealmSwift/RealmSwift/ObjectiveCSupport+Sync.swift
@@ -0,0 +1,49 @@
+////////////////////////////////////////////////////////////////////////////
+//
+// Copyright 2015 Realm Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+////////////////////////////////////////////////////////////////////////////
+
+import Realm
+
+/**
+ :nodoc:
+ **/
+public extension ObjectiveCSupport {
+    /// Convert a `SyncCredentials` to a `RLMSyncCredentials`.
+    static func convert(object: SyncCredentials) -> RLMSyncCredentials {
+        return RLMSyncCredentials(object)
+    }
+
+    /// Convert a `RLMSyncCredentials` to a `SyncCredentials`.
+    static func convert(object: RLMSyncCredentials) -> SyncCredentials {
+        return SyncCredentials(object)
+    }
+
+    /// Convert a `SyncConfiguration` to a `RLMSyncConfiguration`.
+    static func convert(object: SyncConfiguration) -> RLMSyncConfiguration {
+        return object.asConfig()
+    }
+
+    /// Convert a `RLMSyncConfiguration` to a `SyncConfiguration`.
+    static func convert(object: RLMSyncConfiguration) -> SyncConfiguration {
+        return SyncConfiguration(config: object)
+    }
+
+    /// Convert a `RLMSyncSubscription` to a `SyncSubscription`.
+    static func convert(object: RLMSyncSubscription) -> SyncSubscription {
+        return SyncSubscription(object)
+    }
+}
diff --git a/Pods/RealmSwift/RealmSwift/ObjectiveCSupport.swift b/Pods/RealmSwift/RealmSwift/ObjectiveCSupport.swift
index 46a1dc3..3de35be 100644
--- a/Pods/RealmSwift/RealmSwift/ObjectiveCSupport.swift
+++ b/Pods/RealmSwift/RealmSwift/ObjectiveCSupport.swift
@@ -28,7 +28,7 @@ import Realm
 
  :nodoc:
  **/
-public final class ObjectiveCSupport {
+public struct ObjectiveCSupport {
 
     /// Convert a `Results` to a `RLMResults`.
     public static func convert<T>(object: Results<T>) -> RLMResults<AnyObject> {
@@ -130,16 +130,6 @@ public final class ObjectiveCSupport {
         return SortDescriptor(keyPath: object.keyPath, ascending: object.ascending)
     }
 
-    /// Convert a `SyncCredentials` to a `RLMSyncCredentials`.
-    public static func convert(object: SyncCredentials) -> RLMSyncCredentials {
-        return RLMSyncCredentials(object)
-    }
-
-    /// Convert a `RLMSyncCredentials` to a `SyncCredentials`.
-    public static func convert(object: RLMSyncCredentials) -> SyncCredentials {
-        return SyncCredentials(object)
-    }
-
     /// Convert a `RLMShouldCompactOnLaunchBlock` to a Realm Swift compact block.
     public static func convert(object: @escaping RLMShouldCompactOnLaunchBlock) -> (Int, Int) -> Bool {
         return { totalBytes, usedBytes in
@@ -153,14 +143,4 @@ public final class ObjectiveCSupport {
             return object(Int(totalBytes), Int(usedBytes))
         }
     }
-
-    /// Convert a `SyncConfiguration` to a `RLMSyncConfiguration`.
-    public static func convert(object: SyncConfiguration) -> RLMSyncConfiguration {
-        return object.asConfig()
-    }
-
-    /// Convert a `RLMSyncConfiguration` to a `SyncConfiguration`.
-    public static func convert(object: RLMSyncConfiguration) -> SyncConfiguration {
-        return SyncConfiguration(config: object)
-    }
 }
diff --git a/Pods/RealmSwift/RealmSwift/Optional.swift b/Pods/RealmSwift/RealmSwift/Optional.swift
index 6cf5838..ec0b571 100644
--- a/Pods/RealmSwift/RealmSwift/Optional.swift
+++ b/Pods/RealmSwift/RealmSwift/Optional.swift
@@ -24,7 +24,7 @@ public protocol RealmOptionalType {
 
 public extension RealmOptionalType {
     /// :nodoc:
-    public static func className() -> String {
+    static func className() -> String {
         return ""
     }
 }
@@ -64,3 +64,22 @@ public final class RealmOptional<Value: RealmOptionalType>: RLMOptionalBase {
         self.value = value
     }
 }
+
+#if swift(>=4.1)
+extension RealmOptional: Codable where Value: Codable {
+    public convenience init(from decoder: Decoder) throws {
+        self.init()
+        // `try decoder.singleValueContainer().decode(Value?.self)` incorrectly
+        // rejects null values: https://bugs.swift.org/browse/SR-7404
+        let container = try decoder.singleValueContainer()
+        self.value = container.decodeNil() ? nil : try container.decode(Value.self)
+    }
+
+    public func encode(to encoder: Encoder) throws {
+        try self.value.encode(to: encoder)
+    }
+}
+#endif
+
+internal protocol RealmOptionalProtocol { }
+extension RealmOptional: RealmOptionalProtocol { }
diff --git a/Pods/RealmSwift/RealmSwift/Realm.swift b/Pods/RealmSwift/RealmSwift/Realm.swift
index def1432..4ef7ea7 100644
--- a/Pods/RealmSwift/RealmSwift/Realm.swift
+++ b/Pods/RealmSwift/RealmSwift/Realm.swift
@@ -37,7 +37,7 @@ import Realm.Private
  that you must construct a new instance in each block which is dispatched, as a queue is not guaranteed to
  run all of its blocks on the same thread.
  */
-public final class Realm {
+public struct Realm {
 
     // MARK: Properties
 
@@ -63,7 +63,7 @@ public final class Realm {
 
      - throws: An `NSError` if the Realm could not be initialized.
      */
-    public convenience init() throws {
+    public init() throws {
         let rlmRealm = try RLMRealm(configuration: RLMRealmConfiguration.default())
         self.init(rlmRealm)
     }
@@ -75,7 +75,7 @@ public final class Realm {
 
      - throws: An `NSError` if the Realm could not be initialized.
      */
-    public convenience init(configuration: Configuration) throws {
+    public init(configuration: Configuration) throws {
         let rlmRealm = try RLMRealm(configuration: configuration.rlmConfiguration)
         self.init(rlmRealm)
     }
@@ -87,7 +87,7 @@ public final class Realm {
 
      - throws: An `NSError` if the Realm could not be initialized.
      */
-    public convenience init(fileURL: URL) throws {
+    public init(fileURL: URL) throws {
         var configuration = Configuration.defaultConfiguration
         configuration.fileURL = fileURL
         try self.init(configuration: configuration)
@@ -110,17 +110,60 @@ public final class Realm {
                                 it will be passed in as an argument.
                                 Otherwise, a `Swift.Error` describing what went wrong will be
                                 passed to the block instead.
+     - returns: A task object which can be used to observe or cancel the async open.
 
      - note: The returned Realm is confined to the thread on which it was created.
              Because GCD does not guarantee that queues will always use the same
              thread, accessing the returned Realm outside the callback block (even if
              accessed from `callbackQueue`) is unsafe.
      */
+    @discardableResult
     public static func asyncOpen(configuration: Realm.Configuration = .defaultConfiguration,
                                  callbackQueue: DispatchQueue = .main,
-                                 callback: @escaping (Realm?, Swift.Error?) -> Void) {
-        RLMRealm.asyncOpen(with: configuration.rlmConfiguration, callbackQueue: callbackQueue) { rlmRealm, error in
+                                 callback: @escaping (Realm?, Swift.Error?) -> Void) -> AsyncOpenTask {
+        return AsyncOpenTask(rlmTask: RLMRealm.asyncOpen(with: configuration.rlmConfiguration, callbackQueue: callbackQueue) { rlmRealm, error in
             callback(rlmRealm.flatMap(Realm.init), error)
+        })
+    }
+
+    /**
+     A task object which can be used to observe or cancel an async open.
+
+     When a synchronized Realm is opened asynchronously, the latest state of the
+     Realm is downloaded from the server before the completion callback is
+     invoked. This task object can be used to observe the state of the download
+     or to cancel it. This should be used instead of trying to observe the
+     download via the sync session as the sync session itself is created
+     asynchronously, and may not exist yet when Realm.asyncOpen() returns.
+     */
+    public struct AsyncOpenTask {
+        fileprivate let rlmTask: RLMAsyncOpenTask
+
+        /**
+         Cancel the asynchronous open.
+
+         Any download in progress will be cancelled, and the completion block for this
+         async open will never be called. If multiple async opens on the same Realm are
+         happening concurrently, all other opens will fail with the error "operation cancelled".
+         */
+        public func cancel() { rlmTask.cancel() }
+
+        /**
+         Register a progress notification block.
+
+         Each registered progress notification block is called whenever the sync
+         subsystem has new progress data to report until the task is either cancelled
+         or the completion callback is called. Progress notifications are delivered on
+         the supplied queue.
+
+         - parameter queue: The queue to deliver progress notifications on.
+         - parameter block: The block to invoke when notifications are available.
+         */
+        public func addProgressNotification(queue: DispatchQueue = .main,
+                                            block: @escaping (SyncSession.Progress) -> Void) {
+            rlmTask.addProgressNotification(on: queue) { transferred, transferrable in
+                block(SyncSession.Progress(transferred: transferred, transferrable: transferrable))
+            }
         }
     }
 
@@ -144,12 +187,27 @@ public final class Realm {
      and generates notifications if applicable. This has no effect if the Realm
      was already up to date.
 
+     You can skip notifiying specific notification blocks about the changes made
+     in this write transaction by passing in their associated notification
+     tokens. This is primarily useful when the write transaction is saving
+     changes already made in the UI and you do not want to have the notification
+     block attempt to re-apply the same changes.
+
+     The tokens passed to this function must be for notifications for this Realm
+     which were added on the same thread as the write transaction is being
+     performed on. Notifications for different threads cannot be skipped using
+     this method.
+
+     - parameter tokens: An array of notification tokens which were returned
+                         from adding callbacks which you do not want to be
+                         notified for the changes made in this write transaction.
+
      - parameter block: The block containing actions to perform.
 
      - throws: An `NSError` if the transaction could not be completed successfully.
                If `block` throws, the function throws the propagated `ErrorType` instead.
      */
-    public func write(_ block: (() throws -> Void)) throws {
+    public func write(withoutNotifying tokens: [NotificationToken] = [], _ block: (() throws -> Void)) throws {
         beginWrite()
         do {
             try block()
@@ -157,7 +215,7 @@ public final class Realm {
             if isInWriteTransaction { cancelWrite() }
             throw error
         }
-        if isInWriteTransaction { try commitWrite() }
+        if isInWriteTransaction { try commitWrite(withoutNotifying: tokens) }
     }
 
     /**
@@ -207,6 +265,10 @@ public final class Realm {
 
      - warning: This method may only be called during a write transaction.
 
+     - parameter tokens: An array of notification tokens which were returned
+                         from adding callbacks which you do not want to be
+                         notified for the changes made in this write transaction.
+
      - throws: An `NSError` if the transaction could not be written due to
                running out of disk space or other i/o errors.
      */
@@ -264,60 +326,114 @@ public final class Realm {
     // MARK: Adding and Creating objects
 
     /**
-     Adds or updates an existing object into the Realm.
+     What to do when an object being added to or created in a Realm has a primary key that already exists.
+     */
+    public enum UpdatePolicy: Int {
+        /**
+         Throw an exception. This is the default when no policy is specified for `add()` or `create()`.
 
-     Only pass `true` to `update` if the object has a primary key. If no object exists in the Realm with the same
-     primary key value, the object is inserted. Otherwise, the existing object is updated with any changed values.
+         This behavior is the same as passing `update: false` to `add()` or `create()`.
+         */
+        case error = 1
+        /**
+         Overwrite only properties in the existing object which are different from the new values. This results
+         in change notifications reporting only the properties which changed, and influences the sync merge logic.
 
-     When added, all child relationships referenced by this object will also be added to the Realm if they are not
-     already in it. If the object or any related objects are already being managed by a different Realm an error will be
-     thrown. Instead, use one of the `create` functions to insert a copy of a managed object into a different Realm.
+         If few or no of the properties are changing this will be faster than .all and reduce how much data has
+         to be written to the Realm file. If all of the properties are changing, it may be slower than .all (but
+         will never result in *more* data being written).
+         */
+        case modified = 3
+        /**
+         Overwrite all properties in the existing object with the new values, even if they have not changed. This
+         results in change notifications reporting all properties as changed, and influences the sync merge logic.
 
-     The object to be added must be valid and cannot have been previously deleted from a Realm (i.e. `isInvalidated`
-     must be `false`).
+         This behavior is the same as passing `update: true` to `add()` or `create()`.
+         */
+        case all = 2
+    }
+
+    /// :nodoc:
+    @available(*, unavailable, message: "Pass .error, .modified or .all rather than a boolean. .error is equivalent to false and .all is equivalent to true.")
+    public func add(_ object: Object, update: Bool) {
+        fatalError()
+    }
+
+    /**
+     Adds an unmanaged object to this Realm.
+
+     If an object with the same primary key already exists in this Realm, it is updated with the property values from
+     this object as specified by the `UpdatePolicy` selected. The update policy must be `.error` for objects with no
+     primary key.
+
+     Adding an object to a Realm will also add all child relationships referenced by that object (via `Object` and
+     `List<Object>` properties). Those objects must also be valid objects to add to this Realm, and the value of
+     the `update:` parameter is propagated to those adds.
+
+     The object to be added must either be an unmanaged object or a valid object which is already managed by this
+     Realm. Adding an object already managed by this Realm is a no-op, while adding an object which is managed by
+     another Realm or which has been deleted from any Realm (i.e. one where `isInvalidated` is `true`) is an error.
+
+     To copy a managed object from one Realm to another, use `create()` instead.
+
+     - warning: This method may only be called during a write transaction.
 
      - parameter object: The object to be added to this Realm.
-     - parameter update: If `true`, the Realm will try to find an existing copy of the object (with the same primary
-                         key), and update it. Otherwise, the object will be added.
+     - parameter update: What to do if an object with the same primary key alredy exists. Must be `.error` for objects
+     without a primary key.
      */
-    public func add(_ object: Object, update: Bool = false) {
-        if update && object.objectSchema.primaryKeyProperty == nil {
+    public func add(_ object: Object, update: UpdatePolicy = .error) {
+        if update != .error && object.objectSchema.primaryKeyProperty == nil {
             throwRealmException("'\(object.objectSchema.className)' does not have a primary key and can not be updated")
         }
-        RLMAddObjectToRealm(object, rlmRealm, update)
+        RLMAddObjectToRealm(object, rlmRealm, RLMUpdatePolicy(rawValue: UInt(update.rawValue))!)
+    }
+
+    /// :nodoc:
+    @available(*, unavailable, message: "Pass .error, .modified or .all rather than a boolean. .error is equivalent to false and .all is equivalent to true.")
+    public func add<S: Sequence>(_ objects: S, update: Bool) where S.Iterator.Element: Object {
+        fatalError()
     }
 
     /**
-     Adds or updates all the objects in a collection into the Realm.
+     Adds all the objects in a collection into the Realm.
 
      - see: `add(_:update:)`
 
      - warning: This method may only be called during a write transaction.
 
      - parameter objects: A sequence which contains objects to be added to the Realm.
-     - parameter update: If `true`, objects that are already in the Realm will be updated instead of added anew.
+     - parameter update: How to handle
+     without a primary key.
+     - parameter update: How to handle objects in the collection with a primary key that alredy exists in this
+     Realm. Must be `.error` for object types without a primary key.
      */
-    public func add<S: Sequence>(_ objects: S, update: Bool = false) where S.Iterator.Element: Object {
+    public func add<S: Sequence>(_ objects: S, update: UpdatePolicy = .error) where S.Iterator.Element: Object {
         for obj in objects {
             add(obj, update: update)
         }
     }
 
-    /**
-     Creates or updates a Realm object with a given value, adding it to the Realm and returning it.
+    /// :nodoc:
+    @discardableResult
+    @available(*, unavailable, message: "Pass .error, .modified or .all rather than a boolean. .error is equivalent to false and .all is equivalent to true.")
+    public func create<T: Object>(_ type: T.Type, value: Any = [:], update: Bool) -> T {
+        fatalError()
+    }
 
-     You may only pass `true` to `update` if the object has a primary key. If no object exists
-     in the Realm with the same primary key value, the object is inserted. Otherwise, the
-     existing object is updated with any changed values.
+    /**
+     Creates a Realm object with a given value, adding it to the Realm and returning it.
 
      The `value` argument can be a Realm object, a key-value coding compliant object, an array
      or dictionary returned from the methods in `NSJSONSerialization`, or an `Array` containing
      one element for each managed property. Do not pass in a `LinkingObjects` instance, either
-     by itself or as a member of a collection.
+     by itself or as a member of a collection. If the `value` argument is an array, all properties
+     must be present, valid and in the same order as the properties defined in the model.
 
-     If the object is being created, all required properties that were not defined with default
-     values must be given initial values through the `value` argument. Otherwise, an Objective-C
-     exception will be thrown.
+     If the object type does not have a primary key or no object with the specified primary key
+     already exists, a new object is created in the Realm. If an object already exists in the Realm
+     with the specified primary key and the update policy is `.modified` or `.all`, the existing
+     object will be updated and a reference to that object will be returned.
 
      If the object is being updated, all properties defined in its schema will be set by copying
      from `value` using key-value coding. If the `value` argument does not respond to `value(forKey:)`
@@ -326,25 +442,30 @@ public final class Realm {
      or (if you are passing in an instance of an `Object` subclass) setting the corresponding
      property on `value` to nil.
 
-     If the `value` argument is an array, all properties must be present, valid and in the same
-     order as the properties defined in the model.
-
      - warning: This method may only be called during a write transaction.
 
      - parameter type:   The type of the object to create.
      - parameter value:  The value used to populate the object.
-     - parameter update: If `true`, the Realm will try to find an existing copy of the object (with the same primary
-                         key), and update it. Otherwise, the object will be added.
+     - parameter update: What to do if an object with the same primary key alredy exists. Must be `.error` for object
+     types without a primary key.
 
      - returns: The newly created object.
      */
     @discardableResult
-    public func create<T: Object>(_ type: T.Type, value: Any = [:], update: Bool = false) -> T {
-        let typeName = (type as Object.Type).className()
-        if update && schema[typeName]?.primaryKeyProperty == nil {
-            throwRealmException("'\(typeName)' does not have a primary key and can not be updated")
+    public func create<T: Object>(_ type: T.Type, value: Any = [:], update: UpdatePolicy = .error) -> T {
+        if update != .error {
+            RLMVerifyHasPrimaryKey(type)
         }
-        return unsafeDowncast(RLMCreateObjectInRealmWithValue(rlmRealm, typeName, value, update), to: T.self)
+        let typeName = (type as Object.Type).className()
+        return unsafeDowncast(RLMCreateObjectInRealmWithValue(rlmRealm, typeName, value,
+                                                              RLMUpdatePolicy(rawValue: UInt(update.rawValue))!), to: type)
+    }
+
+    /// :nodoc:
+    @discardableResult
+    @available(*, unavailable, message: "Pass .error, .modified or .all rather than a boolean. .error is equivalent to false and .all is equivalent to true.")
+    public func dynamicCreate(_ typeName: String, value: Any = [:], update: Bool) -> DynamicObject {
+        fatalError()
     }
 
     /**
@@ -355,43 +476,43 @@ public final class Realm {
      Creates or updates an object with the given class name and adds it to the `Realm`, populating
      the object with the given value.
 
-     You may only pass `true` to `update` if the object has a primary key. If no object exists
-     in the Realm with the same primary key value, the object is inserted. Otherwise, the
-     existing object is updated with any changed values.
-
      The `value` argument can be a Realm object, a key-value coding compliant object, an array
      or dictionary returned from the methods in `NSJSONSerialization`, or an `Array` containing
      one element for each managed property. Do not pass in a `LinkingObjects` instance, either
-     by itself or as a member of a collection.
+     by itself or as a member of a collection. If the `value` argument is an array, all properties
+     must be present, valid and in the same order as the properties defined in the model.
 
-     If the object is being created, all required properties that were not defined with default
-     values must be given initial values through the `value` argument. Otherwise, an Objective-C
-     exception will be thrown.
+     If the object type does not have a primary key or no object with the specified primary key
+     already exists, a new object is created in the Realm. If an object already exists in the Realm
+     with the specified primary key and the update policy is `.modified` or `.all`, the existing
+     object will be updated and a reference to that object will be returned.
 
      If the object is being updated, all properties defined in its schema will be set by copying
      from `value` using key-value coding. If the `value` argument does not respond to `value(forKey:)`
      for a given property name (or getter name, if defined), that value will remain untouched.
-     Nullable properties on the object can be set to nil by using `NSNull` as the updated value.
+     Nullable properties on the object can be set to nil by using `NSNull` as the updated value,
+     or (if you are passing in an instance of an `Object` subclass) setting the corresponding
+     property on `value` to nil.
 
-     If the `value` argument is an array, all properties must be present, valid and in the same
-     order as the properties defined in the model.
 
      - warning: This method can only be called during a write transaction.
 
      - parameter className:  The class name of the object to create.
      - parameter value:      The value used to populate the object.
-     - parameter update:     If true will try to update existing objects with the same primary key.
+     - parameter update:     What to do if an object with the same primary key alredy exists.
+     Must be `.error` for object types without a primary key.
 
      - returns: The created object.
 
      :nodoc:
      */
     @discardableResult
-    public func dynamicCreate(_ typeName: String, value: Any = [:], update: Bool = false) -> DynamicObject {
-        if update && schema[typeName]?.primaryKeyProperty == nil {
+    public func dynamicCreate(_ typeName: String, value: Any = [:], update: UpdatePolicy = .error) -> DynamicObject {
+        if update != .error && schema[typeName]?.primaryKeyProperty == nil {
             throwRealmException("'\(typeName)' does not have a primary key and can not be updated")
         }
-        return noWarnUnsafeBitCast(RLMCreateObjectInRealmWithValue(rlmRealm, typeName, value, update),
+        return noWarnUnsafeBitCast(RLMCreateObjectInRealmWithValue(rlmRealm, typeName, value,
+                                                                   RLMUpdatePolicy(rawValue: UInt(update.rawValue))!),
                                    to: DynamicObject.self)
     }
 
@@ -602,7 +723,7 @@ public final class Realm {
         get {
             return rlmRealm.autorefresh
         }
-        set {
+        nonmutating set {
             rlmRealm.autorefresh = newValue
         }
     }
@@ -643,7 +764,7 @@ public final class Realm {
         rlmRealm.invalidate()
     }
 
-    // MARK: Writing a Copy
+    // MARK: File Management
 
     /**
      Writes a compacted and optionally encrypted copy of the Realm to the given local URL.
@@ -662,6 +783,43 @@ public final class Realm {
         try rlmRealm.writeCopy(to: fileURL, encryptionKey: encryptionKey)
     }
 
+    /**
+     Checks if the Realm file for the given configuration exists locally on disk.
+
+     For non-synchronized, non-in-memory Realms, this is equivalent to
+     `FileManager.default.fileExists(atPath:)`. For synchronized Realms, it
+     takes care of computing the actual path on disk based on the server,
+     virtual path, and user as is done when opening the Realm.
+
+     @param config A Realm configuration to check the existence of.
+     @return true if the Realm file for the given configuration exists on disk, false otherwise.
+     */
+    public static func fileExists(for config: Configuration) -> Bool {
+        return RLMRealm.fileExists(for: config.rlmConfiguration)
+    }
+
+    /**
+     Deletes the local Realm file and associated temporary files for the given configuration.
+
+     This deletes the ".realm", ".note" and ".management" files which would be
+     created by opening the Realm with the given configuration. It does not
+     delete the ".lock" file (which contains no persisted data and is recreated
+     from scratch every time the Realm file is opened).
+
+     The Realm must not be currently open on any thread or in another process.
+     If it is, this will throw the error .alreadyOpen. Attempting to open the
+     Realm on another thread while the deletion is happening will block, and
+     then create a new Realm and open that afterwards.
+
+     If the Realm already does not exist this will return `false`.
+
+     @param config A Realm configuration identifying the Realm to be deleted.
+     @return true if any files were deleted, false otherwise.
+     */
+    public static func deleteFiles(for config: Configuration) throws -> Bool {
+        return try RLMRealm.deleteFiles(for: config.rlmConfiguration)
+    }
+
     // MARK: Internal
 
     internal var rlmRealm: RLMRealm
diff --git a/Pods/RealmSwift/RealmSwift/RealmCollection.swift b/Pods/RealmSwift/RealmSwift/RealmCollection.swift
index 9c7cae7..be5e3db 100644
--- a/Pods/RealmSwift/RealmSwift/RealmCollection.swift
+++ b/Pods/RealmSwift/RealmSwift/RealmCollection.swift
@@ -32,11 +32,9 @@ public struct RLMIterator<Element: RealmCollectionValue>: IteratorProtocol {
     /// Advance to the next element and return it, or `nil` if no next element exists.
     public mutating func next() -> Element? {
         let next = generatorBase.next()
-        #if swift(>=3.4) && (swift(>=4.1.50) || !swift(>=4))
         if next is NSNull {
             return Element._nilValue()
         }
-        #endif
         if let next = next as? Object? {
             if next == nil {
                 return nil as Element?
@@ -134,7 +132,6 @@ private func forceCast<A, U>(_ from: A, to type: U.Type) -> U {
     return from as! U
 }
 
-#if swift(>=3.4) && (swift(>=4.1.50) || !swift(>=4))
 /// A type which can be stored in a Realm List or Results.
 ///
 /// Declaring additional types as conforming to this protocol will not make them
@@ -147,18 +144,6 @@ public protocol RealmCollectionValue: Equatable {
     /// :nodoc:
     static func _nilValue() -> Self
 }
-#else
-/// A type which can be stored in a Realm List or Results
-///
-/// Declaring additional types as conforming to this protocol will not make them
-/// actually work. Most of the logic for how to store values in Realm is not
-/// implemented in Swift and there is currently no extension mechanism for
-/// supporting more types.
-public protocol RealmCollectionValue {
-    /// :nodoc:
-    static func _rlmArray() -> RLMArray<AnyObject>
-}
-#endif
 
 extension RealmCollectionValue {
     /// :nodoc:
@@ -181,11 +166,10 @@ private func arrayType<T>(_ type: T.Type) -> RLMArray<AnyObject> {
     case is String.Type: return RLMArray(objectType: .string, optional: true)
     case is Data.Type:   return RLMArray(objectType: .data, optional: true)
     case is Date.Type:   return RLMArray(objectType: .date, optional: true)
-    default: fatalError("Unsupported type for List: \(T.self)?")
+    default: fatalError("Unsupported type for List: \(type)?")
     }
 }
 
-#if swift(>=3.4) && (swift(>=4.1.50) || !swift(>=4))
 extension Optional: RealmCollectionValue where Wrapped: RealmCollectionValue {
     /// :nodoc:
     public static func _rlmArray() -> RLMArray<AnyObject> {
@@ -196,18 +180,6 @@ extension Optional: RealmCollectionValue where Wrapped: RealmCollectionValue {
         return nil
     }
 }
-#else
-extension Optional: RealmCollectionValue {
-    /// :nodoc:
-    public static func _rlmArray() -> RLMArray<AnyObject> {
-        return arrayType(Wrapped.self)
-    }
-    /// :nodoc:
-    public static func _nilValue() -> Optional {
-        return nil
-    }
-}
-#endif
 
 extension Int: RealmCollectionValue {}
 extension Int8: RealmCollectionValue {}
@@ -252,26 +224,23 @@ extension Data: RealmCollectionValue {
     }
 }
 
-#if swift(>=3.2)
-// FIXME: When we drop support for Swift 3.1, change ElementType to Element
-// throughout the project (this is a non-breaking change). We use ElementType
-// only because of limitations in Swift 3.1's compiler.
 /// :nodoc:
-public protocol RealmCollectionBase: RandomAccessCollection, LazyCollectionProtocol, CustomStringConvertible, ThreadConfined where Element: RealmCollectionValue {
-    typealias ElementType = Element
+public protocol _RealmCollectionEnumerator {
+    // swiftlint:disable:next identifier_name
+    func _asNSFastEnumerator() -> Any
 }
-#else
+
 /// :nodoc:
-public protocol RealmCollectionBase: RandomAccessCollection, LazyCollectionProtocol, CustomStringConvertible, ThreadConfined {
-    /// The type of the objects contained in the collection.
-    associatedtype ElementType: RealmCollectionValue
+public protocol RealmCollectionBase: RandomAccessCollection, LazyCollectionProtocol, CustomStringConvertible, ThreadConfined where Element: RealmCollectionValue {
+    // This typealias was needed with Swift 3.1. It no longer is, but remains
+    // just in case someone was depending on it
+    typealias ElementType = Element
 }
-#endif
 
 /**
  A homogenous collection of `Object`s which can be retrieved, filtered, sorted, and operated upon.
 */
-public protocol RealmCollection: RealmCollectionBase {
+public protocol RealmCollection: RealmCollectionBase, _RealmCollectionEnumerator {
     // Must also conform to `AssistedObjectiveCBridgeable`
 
     // MARK: Properties
@@ -300,7 +269,7 @@ public protocol RealmCollection: RealmCollectionBase {
 
      - parameter object: An object.
      */
-    func index(of object: ElementType) -> Int?
+    func index(of object: Element) -> Int?
 
     /**
      Returns the index of the first object matching the predicate, or `nil` if no objects match.
@@ -324,14 +293,14 @@ public protocol RealmCollection: RealmCollectionBase {
 
      - parameter predicateFormat: A predicate format string, optionally followed by a variable number of arguments.
      */
-    func filter(_ predicateFormat: String, _ args: Any...) -> Results<ElementType>
+    func filter(_ predicateFormat: String, _ args: Any...) -> Results<Element>
 
     /**
      Returns a `Results` containing all objects matching the given predicate in the collection.
 
      - parameter predicate: The predicate to use to filter the objects.
      */
-    func filter(_ predicate: NSPredicate) -> Results<ElementType>
+    func filter(_ predicate: NSPredicate) -> Results<Element>
 
 
     // MARK: Sorting
@@ -349,7 +318,7 @@ public protocol RealmCollection: RealmCollectionBase {
      - parameter keyPath:   The key path to sort by.
      - parameter ascending: The direction to sort in.
      */
-    func sorted(byKeyPath keyPath: String, ascending: Bool) -> Results<ElementType>
+    func sorted(byKeyPath keyPath: String, ascending: Bool) -> Results<Element>
 
     /**
      Returns a `Results` containing the objects in the collection, but sorted.
@@ -361,7 +330,7 @@ public protocol RealmCollection: RealmCollectionBase {
 
      - parameter sortDescriptors: A sequence of `SortDescriptor`s to sort by.
      */
-    func sorted<S: Sequence>(by sortDescriptors: S) -> Results<ElementType> where S.Iterator.Element == SortDescriptor
+    func sorted<S: Sequence>(by sortDescriptors: S) -> Results<Element> where S.Iterator.Element == SortDescriptor
 
     // MARK: Aggregate Operations
 
@@ -493,7 +462,7 @@ public protocol RealmCollection: RealmCollectionBase {
     func observe(_ block: @escaping (RealmCollectionChange<Self>) -> Void) -> NotificationToken
 
     /// :nodoc:
-    func _observe(_ block: @escaping (RealmCollectionChange<AnyRealmCollection<ElementType>>) -> Void) -> NotificationToken
+    func _observe(_ block: @escaping (RealmCollectionChange<AnyRealmCollection<Element>>) -> Void) -> NotificationToken
 }
 
 /// :nodoc:
@@ -511,19 +480,17 @@ extension Optional: OptionalProtocol {
 }
 
 
-// FIXME: See the declaration of RealmCollectionBase for why this `#if` is required.
-#if swift(>=3.2)
 public extension RealmCollection where Element: MinMaxType {
     /**
      Returns the minimum (lowest) value of the collection, or `nil` if the collection is empty.
      */
-    public func min() -> Element? {
+    func min() -> Element? {
         return min(ofProperty: "self")
     }
     /**
      Returns the maximum (highest) value of the collection, or `nil` if the collection is empty.
      */
-    public func max() -> Element? {
+    func max() -> Element? {
         return max(ofProperty: "self")
     }
 }
@@ -532,13 +499,13 @@ public extension RealmCollection where Element: OptionalProtocol, Element.Wrappe
     /**
      Returns the minimum (lowest) value of the collection, or `nil` if the collection is empty.
      */
-    public func min() -> Element.Wrapped? {
+    func min() -> Element.Wrapped? {
         return min(ofProperty: "self")
     }
     /**
      Returns the maximum (highest) value of the collection, or `nil` if the collection is empty.
      */
-    public func max() -> Element.Wrapped? {
+    func max() -> Element.Wrapped? {
         return max(ofProperty: "self")
     }
 }
@@ -547,13 +514,13 @@ public extension RealmCollection where Element: AddableType {
     /**
      Returns the sum of the values in the collection, or `nil` if the collection is empty.
      */
-    public func sum() -> Element {
+    func sum() -> Element {
         return sum(ofProperty: "self")
     }
     /**
      Returns the average of all of the values in the collection.
      */
-    public func average() -> Double? {
+    func average() -> Double? {
         return average(ofProperty: "self")
     }
 }
@@ -562,13 +529,13 @@ public extension RealmCollection where Element: OptionalProtocol, Element.Wrappe
     /**
      Returns the sum of the values in the collection, or `nil` if the collection is empty.
      */
-    public func sum() -> Element.Wrapped {
+    func sum() -> Element.Wrapped {
         return sum(ofProperty: "self")
     }
     /**
      Returns the average of all of the values in the collection.
      */
-    public func average() -> Double? {
+    func average() -> Double? {
         return average(ofProperty: "self")
     }
 }
@@ -582,7 +549,7 @@ public extension RealmCollection where Element: Comparable {
 
      - parameter ascending: The direction to sort in.
      */
-    public func sorted(ascending: Bool = true) -> Results<Element> {
+    func sorted(ascending: Bool = true) -> Results<Element> {
         return sorted(byKeyPath: "self", ascending: ascending)
     }
 }
@@ -596,99 +563,10 @@ public extension RealmCollection where Element: OptionalProtocol, Element.Wrappe
 
      - parameter ascending: The direction to sort in.
      */
-    public func sorted(ascending: Bool = true) -> Results<Element> {
+    func sorted(ascending: Bool = true) -> Results<Element> {
         return sorted(byKeyPath: "self", ascending: ascending)
     }
 }
-#else
-public extension RealmCollection where ElementType: MinMaxType {
-    /**
-     Returns the minimum (lowest) value of the collection, or `nil` if the collection is empty.
-     */
-    public func min() -> ElementType? {
-        return min(ofProperty: "self")
-    }
-    /**
-     Returns the maximum (highest) value of the collection, or `nil` if the collection is empty.
-     */
-    public func max() -> ElementType? {
-        return max(ofProperty: "self")
-    }
-}
-
-public extension RealmCollection where ElementType: OptionalProtocol, ElementType.Wrapped: MinMaxType {
-    /**
-     Returns the minimum (lowest) value of the collection, or `nil` if the collection is empty.
-     */
-    public func min() -> ElementType.Wrapped? {
-        return min(ofProperty: "self")
-    }
-    /**
-     Returns the maximum (highest) value of the collection, or `nil` if the collection is empty.
-     */
-    public func max() -> ElementType.Wrapped? {
-        return max(ofProperty: "self")
-    }
-}
-
-public extension RealmCollection where ElementType: AddableType {
-    /**
-     Returns the sum of the values in the collection, or `nil` if the collection is empty.
-     */
-    public func sum() -> ElementType {
-        return sum(ofProperty: "self")
-    }
-    /**
-     Returns the average of all of the values in the collection.
-     */
-    public func average() -> Double? {
-        return average(ofProperty: "self")
-    }
-}
-
-public extension RealmCollection where ElementType: OptionalProtocol, ElementType.Wrapped: AddableType {
-    /**
-     Returns the sum of the values in the collection, or `nil` if the collection is empty.
-     */
-    public func sum() -> ElementType.Wrapped {
-        return sum(ofProperty: "self")
-    }
-    /**
-     Returns the average of all of the values in the collection.
-     */
-    public func average() -> Double? {
-        return average(ofProperty: "self")
-    }
-}
-
-public extension RealmCollection where ElementType: Comparable {
-    /**
-     Returns a `Results` containing the objects in the collection, but sorted.
-
-     Objects are sorted based on their values. For example, to sort a collection of `Date`s from
-     neweset to oldest based, you might call `dates.sorted(ascending: true)`.
-
-     - parameter ascending: The direction to sort in.
-     */
-    public func sorted(ascending: Bool = true) -> Results<ElementType> {
-        return sorted(byKeyPath: "self", ascending: ascending)
-    }
-}
-
-public extension RealmCollection where ElementType: OptionalProtocol, ElementType.Wrapped: Comparable {
-    /**
-     Returns a `Results` containing the objects in the collection, but sorted.
-
-     Objects are sorted based on their values. For example, to sort a collection of `Date`s from
-     neweset to oldest based, you might call `dates.sorted(ascending: true)`.
-
-     - parameter ascending: The direction to sort in.
-     */
-    public func sorted(ascending: Bool = true) -> Results<ElementType> {
-        return sorted(byKeyPath: "self", ascending: ascending)
-    }
-}
-#endif
 
 private class _AnyRealmCollectionBase<T: RealmCollectionValue>: AssistedObjectiveCBridgeable {
     typealias Wrapper = AnyRealmCollection<Element>
@@ -721,9 +599,11 @@ private class _AnyRealmCollectionBase<T: RealmCollectionValue>: AssistedObjectiv
         -> NotificationToken { fatalError() }
     class func bridging(from objectiveCValue: Any, with metadata: Any?) -> Self { fatalError() }
     var bridged: (objectiveCValue: Any, metadata: Any?) { fatalError() }
+    // swiftlint:disable:next identifier_name
+    func _asNSFastEnumerator() -> Any { fatalError() }
 }
 
-private final class _AnyRealmCollection<C: RealmCollection>: _AnyRealmCollectionBase<C.ElementType> {
+private final class _AnyRealmCollection<C: RealmCollection>: _AnyRealmCollectionBase<C.Element> {
     let base: C
     init(base: C) {
         self.base = base
@@ -739,7 +619,7 @@ private final class _AnyRealmCollection<C: RealmCollection>: _AnyRealmCollection
 
     // MARK: Index Retrieval
 
-    override func index(of object: C.ElementType) -> Int? { return base.index(of: object) }
+    override func index(of object: C.Element) -> Int? { return base.index(of: object) }
 
     override func index(matching predicate: NSPredicate) -> Int? { return base.index(matching: predicate) }
 
@@ -749,20 +629,20 @@ private final class _AnyRealmCollection<C: RealmCollection>: _AnyRealmCollection
 
     // MARK: Filtering
 
-    override func filter(_ predicateFormat: String, _ args: Any...) -> Results<C.ElementType> {
+    override func filter(_ predicateFormat: String, _ args: Any...) -> Results<C.Element> {
         return base.filter(NSPredicate(format: predicateFormat, argumentArray: unwrapOptionals(in: args)))
     }
 
-    override func filter(_ predicate: NSPredicate) -> Results<C.ElementType> { return base.filter(predicate) }
+    override func filter(_ predicate: NSPredicate) -> Results<C.Element> { return base.filter(predicate) }
 
     // MARK: Sorting
 
-    override func sorted(byKeyPath keyPath: String, ascending: Bool) -> Results<C.ElementType> {
+    override func sorted(byKeyPath keyPath: String, ascending: Bool) -> Results<C.Element> {
         return base.sorted(byKeyPath: keyPath, ascending: ascending)
     }
 
     override func sorted<S: Sequence>
-        (by sortDescriptors: S) -> Results<C.ElementType> where S.Iterator.Element == SortDescriptor {
+        (by sortDescriptors: S) -> Results<C.Element> where S.Iterator.Element == SortDescriptor {
         return base.sorted(by: sortDescriptors)
     }
 
@@ -788,12 +668,8 @@ private final class _AnyRealmCollection<C: RealmCollection>: _AnyRealmCollection
 
     // MARK: Sequence Support
 
-    override subscript(position: Int) -> C.ElementType {
-        #if swift(>=3.2)
-            return base[position as! C.Index]
-        #else
-            return base[position as! C.Index] as! C.ElementType
-        #endif
+    override subscript(position: Int) -> C.Element {
+        return base[position as! C.Index]
     }
 
     override func makeIterator() -> RLMIterator<Element> {
@@ -801,6 +677,10 @@ private final class _AnyRealmCollection<C: RealmCollection>: _AnyRealmCollection
         return base.makeIterator() as! RLMIterator<Element>
     }
 
+    /// :nodoc:
+    override func _asNSFastEnumerator() -> Any {
+        return base._asNSFastEnumerator()
+    }
 
     // MARK: Collection Support
 
@@ -846,7 +726,7 @@ private final class _AnyRealmCollection<C: RealmCollection>: _AnyRealmCollection
 
  Instances of `RealmCollection` forward operations to an opaque underlying collection having the same `Element` type.
  */
-public final class AnyRealmCollection<Element: RealmCollectionValue>: RealmCollection {
+public struct AnyRealmCollection<Element: RealmCollectionValue>: RealmCollection {
 
     /// The type of the objects contained within the collection.
     public typealias ElementType = Element
@@ -862,7 +742,7 @@ public final class AnyRealmCollection<Element: RealmCollectionValue>: RealmColle
     }
 
     /// Creates an `AnyRealmCollection` wrapping `base`.
-    public init<C: RealmCollection>(_ base: C) where C.ElementType == Element {
+    public init<C: RealmCollection>(_ base: C) where C.Element == Element {
         self.base = _AnyRealmCollection(base: base)
     }
 
@@ -1024,6 +904,10 @@ public final class AnyRealmCollection<Element: RealmCollectionValue>: RealmColle
     /// Returns a `RLMIterator` that yields successive elements in the collection.
     public func makeIterator() -> RLMIterator<Element> { return base.makeIterator() }
 
+    /// :nodoc:
+    // swiftlint:disable:next identifier_name
+    public func _asNSFastEnumerator() -> Any { return base._asNSFastEnumerator() }
+
 
     // MARK: Collection Support
 
@@ -1150,15 +1034,3 @@ extension AnyRealmCollection: AssistedObjectiveCBridgeable {
         )
     }
 }
-
-// MARK: Unavailable
-
-extension RealmCollection {
-    @available(*, unavailable, renamed: "sorted(byKeyPath:ascending:)")
-    func sorted(byProperty property: String, ascending: Bool) -> Results<ElementType> { fatalError() }
-
-    @available(*, unavailable, renamed: "observe(_:)")
-    public func addNotificationBlock(_ block: @escaping (RealmCollectionChange<Self>) -> Void) -> NotificationToken {
-        fatalError()
-    }
-}
diff --git a/Pods/RealmSwift/RealmSwift/Results.swift b/Pods/RealmSwift/RealmSwift/Results.swift
index 068c779..c113912 100644
--- a/Pods/RealmSwift/RealmSwift/Results.swift
+++ b/Pods/RealmSwift/RealmSwift/Results.swift
@@ -78,24 +78,15 @@ extension Int64: AddableType {}
 
  Results instances cannot be directly instantiated.
  */
-public final class Results<Element: RealmCollectionValue>: NSObject, NSFastEnumeration {
+public struct Results<Element: RealmCollectionValue>: Equatable {
 
     internal let rlmResults: RLMResults<AnyObject>
 
     /// A human-readable description of the objects represented by the results.
-    public override var description: String {
+    public var description: String {
         return RLMDescriptionWithMaxDepth("Results", rlmResults, RLMDescriptionMaxDepth)
     }
 
-    // MARK: Fast Enumeration
-
-    /// :nodoc:
-    public func countByEnumerating(with state: UnsafeMutablePointer<NSFastEnumerationState>,
-                                   objects buffer: AutoreleasingUnsafeMutablePointer<AnyObject?>,
-                                   count len: Int) -> Int {
-        return Int(rlmResults.countByEnumerating(with: state, objects: buffer, count: UInt(len)))
-    }
-
     /// The type of the objects described by the results.
     public typealias ElementType = Element
 
@@ -174,7 +165,7 @@ public final class Results<Element: RealmCollectionValue>: NSObject, NSFastEnume
 
      - parameter key: The name of the property whose values are desired.
      */
-    public override func value(forKey key: String) -> Any? {
+    public func value(forKey key: String) -> Any? {
         return value(forKeyPath: key)
     }
 
@@ -183,7 +174,7 @@ public final class Results<Element: RealmCollectionValue>: NSObject, NSFastEnume
 
      - parameter keyPath: The key path to the property whose values are desired.
      */
-    public override func value(forKeyPath keyPath: String) -> Any? {
+    public func value(forKeyPath keyPath: String) -> Any? {
         return rlmResults.value(forKeyPath: keyPath)
     }
 
@@ -196,7 +187,7 @@ public final class Results<Element: RealmCollectionValue>: NSObject, NSFastEnume
      - parameter value: The object value.
      - parameter key:   The name of the property whose value should be set on each object.
      */
-    public override func setValue(_ value: Any?, forKey key: String) {
+    public func setValue(_ value: Any?, forKey key: String) {
         return rlmResults.setValue(value, forKeyPath: key)
     }
 
@@ -257,7 +248,7 @@ public final class Results<Element: RealmCollectionValue>: NSObject, NSFastEnume
 
     /**
      Returns a `Results` containing distinct objects based on the specified key paths
-     
+
      - parameter keyPaths:  The key paths used produce distinct results
      */
     public func distinct<S: Sequence>(by keyPaths: S) -> Results<Element>
@@ -337,7 +328,7 @@ public final class Results<Element: RealmCollectionValue>: NSObject, NSFastEnume
      will reflect the state of the Realm after the write transaction.
 
      ```swift
-     let results = realm.objects(Dog.self)
+     let dogs = realm.objects(Dog.self)
      print("dogs.count: \(dogs?.count)") // => 0
      let token = dogs.observe { changes in
          switch changes {
@@ -383,6 +374,13 @@ extension Results: RealmCollection {
         return RLMIterator(collection: rlmResults)
     }
 
+    /// :nodoc:
+    // swiftlint:disable:next identifier_name
+    public func _asNSFastEnumerator() -> Any {
+        return rlmResults
+
+    }
+
     // MARK: Collection Support
 
     /// The position of the first element in a non-empty collection.
@@ -418,3 +416,16 @@ extension Results: AssistedObjectiveCBridgeable {
         return (objectiveCValue: rlmResults, metadata: nil)
     }
 }
+
+// MARK: - Codable
+
+#if swift(>=4.1)
+extension Results: Encodable where Element: Encodable {
+    public func encode(to encoder: Encoder) throws {
+        var container = encoder.unkeyedContainer()
+        for value in self {
+            try container.encode(value)
+        }
+    }
+}
+#endif
diff --git a/Pods/RealmSwift/RealmSwift/SortDescriptor.swift b/Pods/RealmSwift/RealmSwift/SortDescriptor.swift
index ef9548d..c3396e2 100644
--- a/Pods/RealmSwift/RealmSwift/SortDescriptor.swift
+++ b/Pods/RealmSwift/RealmSwift/SortDescriptor.swift
@@ -113,13 +113,3 @@ extension SortDescriptor: ExpressibleByStringLiteral {
         self.init(keyPath: value)
     }
 }
-
-// MARK: Unavailable
-
-extension SortDescriptor {
-    @available(*, unavailable, renamed: "init(keyPath:ascending:)")
-    public init(property: String, ascending: Bool = true) { fatalError() }
-
-    @available(*, unavailable, renamed: "keyPath")
-    public var property: String { fatalError() }
-}
diff --git a/Pods/RealmSwift/RealmSwift/SwiftVersion.swift b/Pods/RealmSwift/RealmSwift/SwiftVersion.swift
index 5b893bd..3ad7bfe 100644
--- a/Pods/RealmSwift/RealmSwift/SwiftVersion.swift
+++ b/Pods/RealmSwift/RealmSwift/SwiftVersion.swift
@@ -1 +1 @@
-let swiftLanguageVersion = "4.2.1"
+let swiftLanguageVersion = "5.1.3"
diff --git a/Pods/RealmSwift/RealmSwift/Sync.swift b/Pods/RealmSwift/RealmSwift/Sync.swift
index 2f47586..a57b571 100644
--- a/Pods/RealmSwift/RealmSwift/Sync.swift
+++ b/Pods/RealmSwift/RealmSwift/Sync.swift
@@ -56,6 +56,13 @@ extension SyncManager {
     }
 }
 
+/**
+ Options for configuring timeouts and intervals in the sync client.
+
+  - see: `RLMSyncTimeoutOptions`
+ */
+public typealias SyncTimeoutOptions = RLMSyncTimeoutOptions
+
 /**
  A session object which represents communication between the client and server for a specific
  Realm.
@@ -154,13 +161,6 @@ extension SyncError {
  */
 public typealias SyncAuthError = RLMSyncAuthError
 
-/**
- An error associated with retrieving or modifying user permissions to access a synchronized Realm.
-
- - see: `RLMSyncPermissionError`
- */
-public typealias SyncPermissionError = RLMSyncPermissionError
-
 /**
  An enum which can be used to specify the level of logging.
 
@@ -188,7 +188,7 @@ public typealias Provider = RLMIdentityProvider
 public enum ServerValidationPolicy {
     /// Perform no validation and accept potentially invalid certificates.
     ///
-    /// -warning: DO NOT USE THIS OPTION IN PRODUCTION.
+    /// - warning: DO NOT USE THIS OPTION IN PRODUCTION.
     case none
 
     /// Use the default server trust evaluation based on the system-wide CA
@@ -235,25 +235,16 @@ public struct SyncConfiguration {
      */
     public let serverValidationPolicy: ServerValidationPolicy
 
-    /**
-     Whether the SSL certificate of the Realm Object Server should be validated.
-     */
-    @available(*, deprecated, message: "Use serverValidationPolicy instead")
+    /// :nodoc:
+    @available(*, unavailable, message: "Use serverValidationPolicy instead")
     public var enableSSLValidation: Bool {
-        if case .none = serverValidationPolicy { return true }
-        return false
+        fatalError()
     }
 
-    /**
-     Whether this Realm should be opened in 'partial synchronization' mode.
-     Partial synchronization mode means that no objects are synchronized from the remote Realm
-     except those matching queries that the user explicitly specifies.
-
-     -warning: Partial synchronization is a tech preview. Its APIs are subject to change.
-     */
-    @available(*, deprecated, message: "Use fullSynchronization instead")
+    /// :nodoc:
+    @available(*, unavailable, message: "Use fullSynchronization instead")
     public var isPartial: Bool {
-        return !fullSynchronization
+        fatalError()
     }
 
     /**
@@ -275,6 +266,14 @@ public struct SyncConfiguration {
      */
     public let urlPrefix: String?
 
+    /**
+     By default, Realm.asyncOpen() swallows non-fatal connection errors such as
+     a connection attempt timing out and simply retries until it succeeds. If
+     this is set to `true`, instead the error will be reported to the callback
+     and the async open will be cancelled.
+     */
+    public let cancelAsyncOpenOnNonFatalErrors: Bool
+
     internal init(config: RLMSyncConfiguration) {
         self.user = config.user
         self.realmURL = config.realmURL
@@ -286,6 +285,7 @@ public struct SyncConfiguration {
         }
         self.fullSynchronization = config.fullSynchronization
         self.urlPrefix = config.urlPrefix
+        self.cancelAsyncOpenOnNonFatalErrors = config.cancelAsyncOpenOnNonFatalErrors
     }
 
     func asConfig() -> RLMSyncConfiguration {
@@ -299,58 +299,32 @@ public struct SyncConfiguration {
         case .pinCertificate(let path):
             certificate = path
         }
-        return RLMSyncConfiguration(user: user, realmURL: realmURL,
-                                    isPartial: !fullSynchronization,
-                                    urlPrefix: urlPrefix,
-                                    stopPolicy: stopPolicy,
-                                    enableSSLValidation: validateSSL,
-                                    certificatePath: certificate)
+        let c = RLMSyncConfiguration(user: user, realmURL: realmURL,
+                                     isPartial: !fullSynchronization,
+                                     urlPrefix: urlPrefix,
+                                     stopPolicy: stopPolicy,
+                                     enableSSLValidation: validateSSL,
+                                     certificatePath: certificate)
+        c.cancelAsyncOpenOnNonFatalErrors = cancelAsyncOpenOnNonFatalErrors
+        return c
     }
 
-    /**
-     Initialize a sync configuration with a user and a Realm URL.
-
-     Additional settings can be optionally specified. Descriptions of these
-     settings follow.
-
-     `enableSSLValidation` is true by default. It can be disabled for debugging
-     purposes.
-
-     - warning: The URL must be absolute (e.g. `realms://example.com/~/foo`), and cannot end with
-                `.realm`, `.realm.lock` or `.realm.management`.
-
-     - warning: NEVER disable SSL validation for a system running in production.
-     */
-    @available(*, deprecated, message: "Use SyncUser.configuration() instead")
+    /// :nodoc:
+    @available(*, unavailable, message: "Use SyncUser.configuration() instead")
     public init(user: SyncUser, realmURL: URL, enableSSLValidation: Bool = true, isPartial: Bool = false, urlPrefix: String? = nil) {
-        self.user = user
-        self.realmURL = realmURL
-        self.stopPolicy = .afterChangesUploaded
-        self.serverValidationPolicy = enableSSLValidation ? .system : .none
-        self.fullSynchronization = !isPartial
-        self.urlPrefix = urlPrefix
+        fatalError()
     }
 
-    /**
-     Return a Realm configuration for syncing with the default Realm of the currently logged-in sync user.
-
-     Partial synchronization is enabled in the returned configuration.
-
-     - requires: There be exactly one logged-in `SyncUser`
-     */
-    @available(*, deprecated, message: "Use SyncUser.configuration() instead")
+    /// :nodoc:
+    @available(*, unavailable, message: "Use SyncUser.configuration() instead")
     public static func automatic() -> Realm.Configuration {
-        return ObjectiveCSupport.convert(object: RLMSyncConfiguration.automaticConfiguration())
+        fatalError()
     }
 
-    /**
-     Return a Realm configuration for syncing with the default Realm of the given sync user.
-
-     Partial synchronization is enabled in the returned configuration.
-    */
-    @available(*, deprecated, message: "Use SyncUser.configuration() instead")
+    /// :nodoc:
+    @available(*, unavailable, message: "Use SyncUser.configuration() instead")
     public static func automatic(user: SyncUser) -> Realm.Configuration {
-        return ObjectiveCSupport.convert(object: RLMSyncConfiguration.automaticConfiguration(for: user))
+        fatalError()
     }
 }
 
@@ -412,6 +386,7 @@ public struct SyncCredentials {
     }
 
     /// Initialize new credentials using a nickname.
+    @available(*, deprecated, message: "Use usernamePassword instead.")
     public static func nickname(_ nickname: String, isAdmin: Bool = false) -> SyncCredentials {
         return SyncCredentials(RLMSyncCredentials(nickname: nickname, isAdmin: isAdmin))
     }
@@ -420,6 +395,11 @@ public struct SyncCredentials {
     public static func anonymous() -> SyncCredentials {
         return SyncCredentials(RLMSyncCredentials.anonymous())
     }
+
+    /// Initialize new credentials using an externally-issued refresh token
+    public static func customRefreshToken(_ token: String, identity: String, isAdmin: Bool = false) -> SyncCredentials {
+        return SyncCredentials(RLMSyncCredentials(customRefreshToken: token, identity: identity, isAdmin: isAdmin))
+    }
 }
 
 extension RLMSyncCredentials {
@@ -496,31 +476,6 @@ extension SyncUser {
         }
     }
 
-    /**
-     Retrieve permissions for this user. Permissions describe which synchronized
-     Realms this user has access to and what they are allowed to do with them.
-
-     Permissions are retrieved asynchronously and returned via the callback. The
-     callback is run on the same thread that the method is invoked upon.
-
-     - warning: This method must be invoked on a thread with an active run loop.
-
-     - warning: Do not pass the `Results` returned by the callback between threads.
-
-     - parameter callback: A callback providing either a `Results` containing the
-                           permissions, or an error describing what went wrong.
-     */
-    public func retrievePermissions(callback: @escaping (SyncPermissionResults?, SyncPermissionError?) -> Void) {
-        self.__retrievePermissions { (results, error) in
-            guard let results = results else {
-                callback(nil, error as! SyncPermissionError?)
-                return
-            }
-            let upcasted: RLMResults<SyncPermission> = results
-            callback(Results(upcasted as! RLMResults<AnyObject>), nil)
-        }
-    }
-
     /**
      Create a permission offer for a Realm.
 
@@ -544,14 +499,8 @@ extension SyncUser {
     public func createOfferForRealm(at url: URL,
                                     accessLevel: SyncAccessLevel,
                                     expiration: Date? = nil,
-                                    callback: @escaping (String?, SyncPermissionError?) -> Void) {
-        self.__createOfferForRealm(at: url, accessLevel: accessLevel, expiration: expiration) { (token, error) in
-            guard let token = token else {
-                callback(nil, error as! SyncPermissionError?)
-                return
-            }
-            callback(token, nil)
-        }
+                                    callback: @escaping (String?, Error?) -> Void) {
+        self.__createOfferForRealm(at: url, accessLevel: accessLevel, expiration: expiration, callback: callback)
     }
 
     /**
@@ -569,7 +518,7 @@ extension SyncUser {
      - warning: NEVER disable SSL validation for a system running in production.
      */
     public func configuration(realmURL: URL? = nil, fullSynchronization: Bool = false,
-                              enableSSLValidation: Bool = true, urlPrefix: String? = nil) -> Realm.Configuration {
+                              enableSSLValidation: Bool, urlPrefix: String? = nil) -> Realm.Configuration {
         let config = self.__configuration(with: realmURL,
                                           fullSynchronization: fullSynchronization,
                                           enableSSLValidation: enableSSLValidation,
@@ -580,24 +529,36 @@ extension SyncUser {
     /**
      Create a sync configuration instance.
 
-     Additional settings can be optionally specified. Descriptions of these
-     settings follow.
-
-     `serverValidationPolicy` defaults to `.system`. It can be set to
-     `.pinCertificate` to pin a specific SSL certificate, or `.none` for
-     debugging purposes.
-
-     - warning: The URL must be absolute (e.g. `realms://example.com/~/foo`), and cannot end with
-     `.realm`, `.realm.lock` or `.realm.management`.
+     - parameter realmURL: The URL to connect to. If not set, the default Realm
+     derived from the authentication URL is used. The URL must be absolute (e.g.
+     `realms://example.com/~/foo`), and cannot end with `.realm`, `.realm.lock`
+     or `.realm.management`.
+     - parameter serverValidationPolicy: How the SSL certificate of the Realm Object
+     Server should be validated. By default the system SSL validation is used,
+     but it can be set to `.pinCertificate` to pin a specific SSL certificate,
+     or `.none` for debugging.
+     - parameter fullSynchronization: Whether this Realm should be a fully
+     synchronized or a query-based Realm.
+     - parameter urlPrefix: The prefix that is prepended to the path in the HTTP
+     request that initiates a sync connection. The value specified must match
+     with the server's expectation, and this parameter only needs to be set if
+     you have changed the configuration of the server.
+     - parameter cancelAsyncOpenOnNonFatalErrors: By default, Realm.asyncOpen()
+     swallows non-fatal connection errors such as a connection attempt timing
+     out and simply retries until it succeeds. If this is set to `true`, instead
+     the error will be reported to the callback and the async open will be
+     cancelled.
 
      - warning: NEVER disable SSL validation for a system running in production.
      */
     public func configuration(realmURL: URL? = nil, fullSynchronization: Bool = false,
-                              serverValidationPolicy: ServerValidationPolicy,
-                              urlPrefix: String? = nil) -> Realm.Configuration {
+                              serverValidationPolicy: ServerValidationPolicy = .system,
+                              urlPrefix: String? = nil,
+                              cancelAsyncOpenOnNonFatalErrors: Bool = false) -> Realm.Configuration {
         let config = self.__configuration(with: realmURL, fullSynchronization: fullSynchronization)
         let syncConfig = config.syncConfiguration!
         syncConfig.urlPrefix = urlPrefix
+        syncConfig.cancelAsyncOpenOnNonFatalErrors = cancelAsyncOpenOnNonFatalErrors
         switch serverValidationPolicy {
         case .none:
             syncConfig.enableSSLValidation = false
@@ -633,14 +594,14 @@ public extension SyncSession {
 
      - see: `RLMSyncSessionState`
      */
-    public typealias State = RLMSyncSessionState
+    typealias State = RLMSyncSessionState
 
     /**
      The current state of a sync session's connection.
 
      - see: `RLMSyncConnectionState`
      */
-    public typealias ConnectionState = RLMSyncConnectionState
+    typealias ConnectionState = RLMSyncConnectionState
 
     /**
      The transfer direction (upload or download) tracked by a given progress notification block.
@@ -648,7 +609,7 @@ public extension SyncSession {
      Progress notification blocks can be registered on sessions if your app wishes to be informed
      how many bytes have been uploaded or downloaded, for example to show progress indicator UIs.
      */
-    public enum ProgressDirection {
+    enum ProgressDirection {
         /// For monitoring upload progress.
         case upload
         /// For monitoring download progress.
@@ -661,7 +622,7 @@ public extension SyncSession {
      Progress notification blocks can be registered on sessions if your app wishes to be informed
      how many bytes have been uploaded or downloaded, for example to show progress indicator UIs.
      */
-    public enum ProgressMode {
+    enum ProgressMode {
         /**
          The block will be called forever, or until it is unregistered by calling
          `ProgressNotificationToken.invalidate()`.
@@ -688,12 +649,12 @@ public extension SyncSession {
      been automatically stopped, calling `invalidate()` does nothing. `invalidate()` should be called
      before the token is destroyed.
      */
-    public typealias ProgressNotificationToken = RLMProgressNotificationToken
+    typealias ProgressNotificationToken = RLMProgressNotificationToken
 
     /**
      A struct encapsulating progress information, as well as useful helper methods.
      */
-    public struct Progress {
+    struct Progress {
         /// The number of bytes that have been transferred.
         public let transferredBytes: Int
 
@@ -724,7 +685,7 @@ public extension SyncSession {
             return transferredBytes >= transferrableBytes
         }
 
-        fileprivate init(transferred: UInt, transferrable: UInt) {
+        internal init(transferred: UInt, transferrable: UInt) {
             transferredBytes = Int(transferred)
             transferrableBytes = Int(transferrable)
         }
@@ -759,9 +720,9 @@ public extension SyncSession {
 
      - see: `ProgressDirection`, `Progress`, `ProgressNotificationToken`
      */
-    public func addProgressNotification(for direction: ProgressDirection,
-                                        mode: ProgressMode,
-                                        block: @escaping (Progress) -> Void) -> ProgressNotificationToken? {
+    func addProgressNotification(for direction: ProgressDirection,
+                                 mode: ProgressMode,
+                                 block: @escaping (Progress) -> Void) -> ProgressNotificationToken? {
         return __addProgressNotification(for: (direction == .upload ? .upload : .download),
                                          mode: (mode == .reportIndefinitely
                                             ? .reportIndefinitely
@@ -772,21 +733,11 @@ public extension SyncSession {
 }
 
 extension Realm {
-    /**
-     If the Realm is a partially synchronized Realm, fetch and synchronize the objects
-     of a given object type that match the given query (in string format).
-
-     The results will be returned asynchronously in the callback.
-     Use `Results.observe(_:)` to be notified to changes to the set of synchronized objects.
-
-     -warning: Partial synchronization is a tech preview. Its APIs are subject to change.
-     */
-    @available(*, deprecated, message: "Use Results.subscribe()")
+    /// :nodoc:
+    @available(*, unavailable, message: "Use Results.subscribe()")
     public func subscribe<T: Object>(to objects: T.Type, where: String,
                                      completion: @escaping (Results<T>?, Swift.Error?) -> Void) {
-        rlmRealm.subscribe(toObjects: objects, where: `where`) { (results, error) in
-            completion(results.map { Results<T>($0) }, error)
-        }
+        fatalError()
     }
 
     /**
@@ -803,44 +754,9 @@ extension Realm {
 extension SyncPermission: RealmCollectionValue { }
 
 /**
- A `Results` collection containing sync permission results.
- */
-public typealias SyncPermissionResults = Results<SyncPermission>
-
-/**
- A property upon which a `SyncPermissionResults` can be sorted or queried.
- The raw value string can be used to construct predicates and queries
- manually.
-
- - warning: If building `NSPredicate`s using format strings including these
-            raw values, use `%K` instead of `%@` as the substitution
-            parameter.
-
- - see: `RLMSyncPermissionSortProperty`
+ An array containing sync permission results.
  */
-public typealias SyncPermissionSortProperty = RLMSyncPermissionSortProperty
-
-extension SortDescriptor {
-    /**
-     Construct a sort descriptor using a `SyncPermissionSortProperty`.
-     */
-    public init(sortProperty: SyncPermissionSortProperty, ascending: Bool = true) {
-        self.init(keyPath: sortProperty.rawValue, ascending: ascending)
-    }
-}
-
-extension Results where Element == SyncPermission {
-    /**
-     Return a `Results<SyncPermissionValue>` containing the objects represented
-     by the results, but sorted on the specified property.
-
-     - see: `sorted(byKeyPath:, ascending:)`
-     */
-    public func sorted(bySortProperty sortProperty: SyncPermissionSortProperty,
-                       ascending: Bool = true) -> Results<Element> {
-        return sorted(by: [SortDescriptor(sortProperty: sortProperty, ascending: ascending)])
-    }
-}
+public typealias SyncPermissionResults = [SyncPermission]
 
 // MARK: - Partial sync subscriptions
 
@@ -898,7 +814,7 @@ public enum SyncSubscriptionState: Equatable {
 /// Changes to the state of the subscription can be observed using `SyncSubscription.observe(_:options:_:)`.
 ///
 /// Subscriptions are created using `Results.subscribe()` or `Results.subscribe(named:)`.
-public class SyncSubscription<T: RealmCollectionValue>: RealmCollectionValue {
+public struct SyncSubscription: RealmCollectionValue {
     private let rlmSubscription: RLMSyncSubscription
 
     /// The name of the subscription.
@@ -909,6 +825,66 @@ public class SyncSubscription<T: RealmCollectionValue>: RealmCollectionValue {
     /// The state of the subscription.
     public var state: SyncSubscriptionState { return SyncSubscriptionState(rlmSubscription) }
 
+    /**
+     The raw query which this subscription is running on the server.
+
+     This string is a serialized representation of the Results which the
+     subscription was created from. This representation does *not* use NSPredicate
+     syntax, and is not guaranteed to remain consistent between versions of Realm.
+     Any use of this other than manual inspection when debugging is likely to be
+     incorrect.
+
+     This is `nil` while the subscription is in the Creating state.
+     */
+    public var query: String? { return rlmSubscription.query }
+
+    /**
+     When this subscription was first created.
+
+     This value will be `nil` for subscriptions created with older versions of
+     Realm which did not store the creation date. Newly created subscriptions
+     should always have a non-nil creation date.
+     */
+    public var createdAt: Date? { return rlmSubscription.createdAt }
+
+    /**
+     When this subscription was last updated.
+
+     This value will be `nil` for subscriptions created with older versions of
+     Realm which did not store the update date. Newly created subscriptions
+     should always have a non-nil update date.
+
+     The update date is the time when the subscription was last updated by a call
+     to `Results.subscribe()`, and not when the set of objects which match the
+     subscription last changed.
+     */
+    public var updatedAt: Date? { return rlmSubscription.updatedAt }
+
+    /**
+     When this subscription will be automatically removed.
+
+     If the `timeToLive` parameter is set when creating a sync subscription, the
+     subscription will be automatically removed the first time that any subscription
+     is created, modified, or deleted after that time has elapsed.
+
+     This property will be `nil` if the `timeToLive` option was not enabled.
+     */
+    public var expiresAt: Date? { return rlmSubscription.expiresAt }
+
+    /**
+     How long this subscription will persist after last being updated.
+
+     If the `timeToLive` parameter is set when creating a sync subscription, the
+     subscription will be automatically removed the first time that any subscription
+     is created, modified, or deleted after that time has elapsed.
+
+     This property will be nil if the `timeToLive` option was not enabled.
+     */
+    public var timeToLive: TimeInterval? {
+        let ttl = rlmSubscription.timeToLive
+        return ttl.isNaN ? nil : ttl
+    }
+
     internal init(_ rlmSubscription: RLMSyncSubscription) {
         self.rlmSubscription = rlmSubscription
     }
@@ -917,9 +893,6 @@ public class SyncSubscription<T: RealmCollectionValue>: RealmCollectionValue {
         return lhs.rlmSubscription == rhs.rlmSubscription
     }
 
-// Partial sync subscriptions are only observable in Swift 3.2 and newer.
-#if swift(>=3.2)
-
     /// Observe the subscription for state changes.
     ///
     /// When the state of the subscription changes, `block` will be invoked and
@@ -944,8 +917,6 @@ public class SyncSubscription<T: RealmCollectionValue>: RealmCollectionValue {
         return KeyValueObservationNotificationToken(observation)
     }
 
-#endif // Swift >= 3.2
-
     /// Remove this subscription
     ///
     /// Removing a subscription will delete all objects from the local Realm that were matched
@@ -957,7 +928,19 @@ public class SyncSubscription<T: RealmCollectionValue>: RealmCollectionValue {
     }
 }
 
+// :nodoc:
+extension SyncSubscription: CustomObjectiveCBridgeable {
+    static func bridging(objCValue: Any) -> SyncSubscription {
+        return ObjectiveCSupport.convert(object: RLMCastToSyncSubscription(objCValue))
+    }
+    var objCValue: Any {
+        return 0
+    }
+}
+
 extension Results {
+    // MARK: Sync
+
     /// Subscribe to the query represented by this `Results`
     ///
     /// Subscribing to a query asks the server to synchronize all objects to the
@@ -968,18 +951,59 @@ extension Results {
     /// notified of when the subscription has been processed by the server and
     /// all objects matching the query are available.
     ///
+    /// ---
+    ///
     /// Creating a new subscription with the same name and query as an existing
     /// subscription will not create a new subscription, but instead will return
     /// an object referring to the existing sync subscription. This means that
     /// performing the same subscription twice followed by removing it once will
     /// result in no subscription existing.
     ///
-    /// The number of top-level matches may optionally be limited. This limit
-    /// respects the sort and distinct order of the query being subscribed to,
-    /// if any. Please note that the limit does not count or apply to objects
-    /// which are added indirectly due to being linked to by the objects in the
-    /// subscription. If the limit is larger than the number of objects which
-    /// match the query, all objects will be included.
+    /// By default trying to create a subscription with a name as an existing
+    /// subscription with a different query or options will fail. If `update` is
+    /// `true`, instead the existing subscription will be changed to use the
+    /// query and options from the new subscription. This only works if the new
+    /// subscription is for the same type of objects as the existing
+    /// subscription, and trying to overwrite a subscription with a subscription
+    /// of a different type of objects will still fail.
+    ///
+    /// ---
+    ///
+    /// The number of top-level objects which are included in the subscription
+    /// can optionally be limited by setting the `limit` paramter. If more
+    /// top-level objects than the limit match the query, only the first
+    /// `limit` objects will be included. This respects the sort and distinct
+    /// order of the query being subscribed to for the determination of what the
+    /// "first" objects are.
+    ///
+    /// The limit does not count or apply to objects which are added indirectly
+    /// due to being linked to by the objects in the subscription or due to
+    /// being listed in `includeLinkingObjects`. If the limit is larger than the
+    /// number of objects which match the query, all objects will be
+    /// included.
+    ///
+    /// ---
+    ///
+    /// By default subscriptions are persistent, and last until they are
+    /// explicitly removed by calling `unsubscribe()`. Subscriptions can instead
+    /// be made temporary by setting the time to live to how long the
+    /// subscription should remain. After that time has elapsed the subscription
+    /// will be automatically removed.
+    ///
+    /// ---
+    ///
+    /// Outgoing links (i.e. `List` and `Object` properties) are automatically
+    /// included in sync subscriptions. That is, if you subscribe to a query
+    /// which matches one object, every object which is reachable via links
+    /// from that object are also included in the subscription. By default,
+    /// `LinkingObjects` properties do not work this way and instead, they only
+    /// report objects which happen to be included in a subscription. Specific
+    /// `LinkingObjects` properties can be explicitly included in the
+    /// subscription by naming them in the `includingLinkingObjects` array. Any
+    /// keypath which ends in a `LinkingObjects` property can be included in
+    /// this array, including ones involving intermediate links.
+    ///
+    /// ---
     ///
     /// Creating a subscription is an asynchronous operation and the newly
     /// created subscription will not be reported by Realm.subscriptions() until
@@ -987,20 +1011,32 @@ extension Results {
     /// `.created` or `.error`.
     ///
     /// - parameter subscriptionName: An optional name for the subscription.
-    /// - parameter limit: The maximum number of objects to include in the subscription.
+    /// - parameter limit: The maximum number of top-level objects to include
+    /// in the subscription.
+    /// - parameter update: Whether an existing subscription with the same name
+    /// should be updated or if it should be an error.
+    /// - parameter timeToLive: How long in seconds this subscription should
+    /// remain active.
+    /// - parameter includingLinkingObjects: Which `LinkingObjects` properties
+    /// should pull in the contained objects.
     /// - returns: The subscription.
-    public func subscribe(named subscriptionName: String? = nil, limit: Int? = nil) -> SyncSubscription<Element> {
+    public func subscribe(named subscriptionName: String? = nil, limit: Int? = nil,
+                          update: Bool = false, timeToLive: TimeInterval? = nil,
+                          includingLinkingObjects: [String] = []) -> SyncSubscription {
+        let options = RLMSyncSubscriptionOptions()
+        options.name = subscriptionName
+        options.overwriteExisting = update
         if let limit = limit {
-            return SyncSubscription(rlmResults.subscribe(withName: subscriptionName, limit: UInt(limit)))
+            options.limit = UInt(limit)
         }
-        if let name = subscriptionName {
-            return SyncSubscription(rlmResults.subscribe(withName: name))
+        if let timeToLive = timeToLive {
+            options.timeToLive = timeToLive
         }
-        return SyncSubscription(rlmResults.subscribe())
+        options.includeLinkingObjectProperties = includingLinkingObjects
+        return SyncSubscription(rlmResults.subscribe(with: options))
     }
 }
 
-#if swift(>=3.2)
 internal class KeyValueObservationNotificationToken: NotificationToken {
     public var observation: NSKeyValueObservation?
 
@@ -1013,13 +1049,6 @@ internal class KeyValueObservationNotificationToken: NotificationToken {
         self.observation = nil
     }
 }
-#endif // Swift >= 3.2
-
-// MARK: - Migration assistance
-
-/// :nodoc:
-@available(*, unavailable, renamed: "SyncPermission")
-public final class SyncPermissionValue { }
 
 // MARK: - Permissions
 
@@ -1390,6 +1419,8 @@ public struct ObjectPrivileges: OptionSet, CustomDebugStringConvertible {
 }
 
 extension Realm {
+    // MARK: Sync - Permissions
+
     /**
     Returns the computed privileges which the current user has for this Realm.
 
@@ -1514,6 +1545,8 @@ extension Realm {
         return object(ofType: RealmPermission.self, forPrimaryKey: 0)!.permissions
     }
 
+    // MARK: Sync - Subscriptions
+
     /**
     Returns this list of the query-based sync subscriptions made for this Realm.
 
@@ -1527,7 +1560,7 @@ extension Realm {
 
      - requires: This must only be called on a Realm using query-based sync.
     */
-    public func subscriptions() -> Results<SyncSubscription<Object>> {
+    public func subscriptions() -> Results<SyncSubscription> {
         return Results(rlmRealm.subscriptions() as! RLMResults<AnyObject>)
     }
 
@@ -1541,7 +1574,7 @@ extension Realm {
 
      - requires: This must only be called on a Realm using query-based sync.
     */
-    public func subscription(named: String) -> SyncSubscription<Object>? {
+    public func subscription(named: String) -> SyncSubscription? {
         return rlmRealm.subscription(withName: named).map(SyncSubscription.init)
     }
 }
@@ -1562,7 +1595,7 @@ extension List where Element == Permission {
     */
     public func findOrCreate(forRoleNamed roleName: String) -> Permission {
         precondition(realm != nil, "Cannot be called on an unmanaged object")
-        return RLMPermissionForRole(_rlmArray, realm!.create(PermissionRole.self, value: [roleName], update: true)) as! Permission
+        return RLMPermissionForRole(_rlmArray, realm!.create(PermissionRole.self, value: [roleName], update: .modified)) as! Permission
     }
 
     /**
diff --git a/Pods/RealmSwift/RealmSwift/ThreadSafeReference.swift b/Pods/RealmSwift/RealmSwift/ThreadSafeReference.swift
index 37379fd..a0b10c2 100644
--- a/Pods/RealmSwift/RealmSwift/ThreadSafeReference.swift
+++ b/Pods/RealmSwift/RealmSwift/ThreadSafeReference.swift
@@ -61,7 +61,7 @@ public protocol ThreadConfined {
  - see: `ThreadConfined`
  - see: `Realm.resolve(_:)`
  */
-public class ThreadSafeReference<Confined: ThreadConfined> {
+public struct ThreadSafeReference<Confined: ThreadConfined> {
     private let swiftMetadata: Any?
 
     /**
@@ -93,6 +93,8 @@ public class ThreadSafeReference<Confined: ThreadConfined> {
 }
 
 extension Realm {
+    // MARK: Thread Safe Reference
+
     /**
      Returns the same object as the one referenced when the `ThreadSafeReference` was first
      created, but resolved for the current Realm for this thread. Returns `nil` if this object was
diff --git a/Pods/RealmSwift/RealmSwift/Util.swift b/Pods/RealmSwift/RealmSwift/Util.swift
index 767aa54..151c06d 100644
--- a/Pods/RealmSwift/RealmSwift/Util.swift
+++ b/Pods/RealmSwift/RealmSwift/Util.swift
@@ -49,8 +49,9 @@ internal func notFoundToNil(index: UInt) -> Int? {
     return Int(index)
 }
 
-internal func throwRealmException(_ message: String, userInfo: [AnyHashable: Any]? = nil) {
+internal func throwRealmException(_ message: String, userInfo: [AnyHashable: Any]? = nil) -> Never {
     NSException(name: NSExceptionName(rawValue: RLMExceptionName), reason: message, userInfo: userInfo).raise()
+    fatalError() // unreachable
 }
 
 internal func throwForNegativeIndex(_ int: Int, parameterName: String = "index") {
@@ -83,27 +84,25 @@ extension Object {
 
 // MARK: CustomObjectiveCBridgeable
 
-fileprivate extension SyncSubscription {
-    fileprivate convenience init(_ rlmSubscription: Any) {
-        self.init(RLMCastToSyncSubscription(rlmSubscription as AnyObject))
-    }
-}
-
-internal func dynamicBridgeCast<T>(fromObjectiveC x: Any) -> T {
+/// :nodoc:
+public func dynamicBridgeCast<T>(fromObjectiveC x: Any) -> T {
     if T.self == DynamicObject.self {
         return unsafeBitCast(x as AnyObject, to: T.self)
     } else if let bridgeableType = T.self as? CustomObjectiveCBridgeable.Type {
         return bridgeableType.bridging(objCValue: x) as! T
-    } else if T.self == SyncSubscription<Object>.self {
-        return SyncSubscription<Object>(x) as! T
+    } else if let bridgeableType = T.self as? RealmEnum.Type {
+        return bridgeableType._rlmFromRawValue(x) as! T
     } else {
         return x as! T
     }
 }
 
-internal func dynamicBridgeCast<T>(fromSwift x: T) -> Any {
+/// :nodoc:
+public func dynamicBridgeCast<T>(fromSwift x: T) -> Any {
     if let x = x as? CustomObjectiveCBridgeable {
         return x.objCValue
+    } else if let bridgeableType = T.self as? RealmEnum.Type {
+        return bridgeableType._rlmToRawValue(x)
     } else {
         return x
     }
diff --git a/Pods/RealmSwift/build.sh b/Pods/RealmSwift/build.sh
index 558a1ce..210c0aa 100755
--- a/Pods/RealmSwift/build.sh
+++ b/Pods/RealmSwift/build.sh
@@ -6,8 +6,8 @@
 # (C) Copyright 2011-2015 by realm.io.
 ##################################################################################
 
-# Warning: pipefail is not a POSIX compatible option, but on OS X it works just fine.
-#          OS X uses a POSIX complain version of bash as /bin/sh, but apparently it does
+# Warning: pipefail is not a POSIX compatible option, but on macOS it works just fine.
+#          macOS uses a POSIX complain version of bash as /bin/sh, but apparently it does
 #          not strip away this feature. Also, this will fail if somebody forces the script
 #          to be run with zsh.
 set -o pipefail
@@ -16,6 +16,8 @@ set -e
 source_root="$(dirname "$0")"
 
 # You can override the version of the core library
+: ${REALM_BASE_URL:="https://static.realm.io/downloads"} # set it if you need to use a remote repo
+
 : ${REALM_CORE_VERSION:=$(sed -n 's/^REALM_CORE_VERSION=\(.*\)$/\1/p' ${source_root}/dependencies.list)} # set to "current" to always use the current build
 
 : ${REALM_SYNC_VERSION:=$(sed -n 's/^REALM_SYNC_VERSION=\(.*\)$/\1/p' ${source_root}/dependencies.list)}
@@ -43,7 +45,7 @@ command:
   clean:                clean up/remove all generated files
   download-core:        downloads core library (binary version)
   download-sync:        downloads sync library (binary version, core+sync)
-  build:                builds all iOS  and OS X frameworks
+  build:                builds all iOS and macOS frameworks
   ios-static:           builds fat iOS static framework
   ios-dynamic:          builds iOS dynamic frameworks
   ios-swift:            builds RealmSwift frameworks for iOS
@@ -51,11 +53,12 @@ command:
   watchos-swift:        builds RealmSwift framework for watchOS
   tvos:                 builds tvOS framework
   tvos-swift:           builds RealmSwift framework for tvOS
-  osx:                  builds OS X framework
-  osx-swift:            builds RealmSwift framework for OS X
-  analyze-osx:          analyzes OS X framework
-  test:                 tests all iOS and OS X frameworks
-  test-all:             tests all iOS and OS X frameworks in both Debug and Release configurations
+  osx:                  builds macOS framework
+  osx-swift:            builds RealmSwift framework for macOS
+  xcframework [plats]:  builds xcframeworks for Realm and RealmSwift for given platforms
+  analyze-osx:          analyzes macOS framework
+  test:                 tests all iOS and macOS frameworks
+  test-all:             tests all iOS and macOS frameworks in both Debug and Release configurations
   test-ios-static:      tests static iOS framework on 32-bit and 64-bit simulators
   test-ios-dynamic:     tests dynamic iOS framework on 32-bit and 64-bit simulators
   test-ios-swift:       tests RealmSwift iOS framework on 32-bit and 64-bit simulators
@@ -65,15 +68,16 @@ command:
   test-tvos:            tests tvOS framework
   test-tvos-swift:      tests RealmSwift tvOS framework
   test-tvos-devices:    tests ObjC & Swift tvOS frameworks on all attached tvOS devices
-  test-osx:             tests OS X framework
-  test-osx-swift:       tests RealmSwift OS X framework
+  test-osx:             tests macOS framework
+  test-osx-swift:       tests RealmSwift macOS framework
+  test-swiftpm:         tests ObjC and Swift macOS frameworks via SwiftPM
   verify:               verifies docs, osx, osx-swift, ios-static, ios-dynamic, ios-swift, ios-device in both Debug and Release configurations, swiftlint
   verify-osx-object-server:  downloads the Realm Object Server and runs the Objective-C and Swift integration tests
   docs:                 builds docs in docs/output
   examples:             builds all examples
   examples-ios:         builds all static iOS examples
   examples-ios-swift:   builds all Swift iOS examples
-  examples-osx:         builds all OS X examples
+  examples-osx:         builds all macOS examples
   get-version:          get the current version
   set-version version:  set the version
   cocoapods-setup:      download realm-core and create a stub RLMPlatform.h file to enable building via CocoaPods
@@ -124,7 +128,7 @@ xc() {
 }
 
 xctest() {
-  xc "$@" build
+  xc "$@" build-for-testing
   xc "$@" test
 }
 
@@ -145,25 +149,18 @@ build_combined() {
     local os_name=""
     if [[ "$os" == "iphoneos" ]]; then
         os_name="ios"
-        destination="iPhone 6"
+        destination="iPhone 8"
     elif [[ "$os" == "watchos"  ]]; then
         os_name="$os"
-        if (( $(xcode_version_major) >= 10 )); then
-            destination="Apple Watch Series 3 - 42mm"
-        else
-            destination="Apple Watch - 42mm"
-        fi
+        destination="Apple Watch Series 3 - 42mm"
     elif [[ "$os" == "appletvos"  ]]; then
         os_name="tvos"
-        if (( $(xcode_version_major) >= 9 )); then
-            destination="Apple TV"
-        else
-            destination="Apple TV 1080p"
-        fi
+        destination="Apple TV"
     fi
 
     # Derive build paths
     local build_products_path="build/DerivedData/Realm/Build/Products"
+    local build_intermediates_path="build/DerivedData/Realm/Build/Intermediates.noindex"
     local product_name="$module_name.framework"
     local binary_path="$module_name"
     local os_path="$build_products_path/$config-$os$scope_suffix/$product_name"
@@ -179,6 +176,20 @@ build_combined() {
       cp $simulator_path/Modules/$module_name.swiftmodule/* $os_path/Modules/$module_name.swiftmodule/
     fi
 
+    # Xcode 10.2 merges the generated headers together with ifdef guards for
+    # each of the target platforms. This doesn't handle merging
+    # device/simulator builds, so we need to take care of that ourselves.
+    # Currently all platforms have identical headers, so we just pick one and
+    # use that rather than merging, but this may change in the future.
+    if [ -f $os_path/Headers/$module_name-Swift.h ]; then
+      unique_headers=$(find $build_intermediates_path -name $module_name-Swift.h -exec shasum {} \; | cut -d' ' -f 1 | uniq | grep -c '^')
+      if [ $unique_headers != "1" ]; then
+        echo "Platform-specific Swift generated headers are not identical. Merging them is required and is not yet implemented."
+        exit 1
+      fi
+      find $build_intermediates_path -name $module_name-Swift.h -exec cp {} $os_path/Headers \; -quit
+    fi
+
     # Copy *.bcsymbolmap to .framework for submitting app with bitcode
     copy_bcsymbolmap "$build_products_path/$config-$os$scope_suffix" "$os_path"
 
@@ -196,6 +207,12 @@ build_combined() {
     fi
 }
 
+copy_realm_framework() {
+    local platform="$1"
+    rm -rf build/$platform/swift-$REALM_XCODE_VERSION/Realm.framework
+    cp -R build/$platform/Realm.framework build/$platform/swift-$REALM_XCODE_VERSION
+}
+
 clean_retrieve() {
   mkdir -p "$2"
   rm -rf "$2/$3"
@@ -210,20 +227,14 @@ move_to_clean_dir() {
 
 test_ios_static() {
     destination="$1"
-    xc "-scheme 'Realm iOS static' -configuration $CONFIGURATION -sdk iphonesimulator -destination '$destination' build"
-    if (( $(xcode_version_major) < 9 )); then
-        xc "-scheme 'Realm iOS static' -configuration $CONFIGURATION -sdk iphonesimulator -destination '$destination' test 'ARCHS=\$(ARCHS_STANDARD_32_BIT)'"
-    fi
-
-    # Xcode's depending tracking is lacking and it doesn't realize that the Realm static framework's static library
-    # needs to be recreated when the active architectures change. Help Xcode out by removing the static library.
-    settings=$(xcode "-scheme 'Realm iOS static' -configuration $CONFIGURATION -sdk iphonesimulator -destination '$destination' -showBuildSettings")
-    path=$(echo "$settings" | awk '/CONFIGURATION_BUILD_DIR/ { cbd = $3; } /EXECUTABLE_PATH/ { ep = $3; } END { printf "%s/%s\n", cbd, ep; }')
-    rm "$path"
-
+    xc "-scheme 'Realm iOS static' -configuration $CONFIGURATION -sdk iphonesimulator -destination '$destination' build-for-testing"
     xc "-scheme 'Realm iOS static' -configuration $CONFIGURATION -sdk iphonesimulator -destination '$destination' test"
 }
 
+plist_get() {
+    /usr/libexec/PlistBuddy -c "Print :$2" $1 2> /dev/null
+}
+
 ######################################
 # Device Test Helper
 ######################################
@@ -319,16 +330,16 @@ download_common() {
 
     if [ "$download_type" == "core" ]; then
         version=$REALM_CORE_VERSION
-        url="https://static.realm.io/downloads/core/realm-core-${version}.tar.xz"
+        url="${REALM_BASE_URL}/core/realm-core-${version}.tar.xz"
     elif [ "$download_type" == "sync" ]; then
         version=$REALM_SYNC_VERSION
-        url="https://static.realm.io/downloads/sync/realm-sync-cocoa-${version}.tar.xz"
+        url="${REALM_BASE_URL}/sync/realm-sync-cocoa-${version}.tar.xz"
     else
         echo "Unknown dowload_type: $download_type"
         exit 1
     fi
 
-    echo "Downloading dependency: ${download_type} ${version}"
+    echo "Downloading dependency: ${download_type} ${version} from ${url}"
 
     if [ -z "$TMPDIR" ]; then
         TMPDIR='/tmp'
@@ -378,18 +389,13 @@ download_sync() {
 COMMAND="$1"
 
 # Use Debug config if command ends with -debug, otherwise default to Release
-# Set IS_RUNNING_PACKAGING when running packaging steps to avoid running iOS static tests with Xcode 8.3.3
 case "$COMMAND" in
     *-debug)
         COMMAND="${COMMAND%-debug}"
         CONFIGURATION="Debug"
         ;;
-    package-*)
-        IS_RUNNING_PACKAGING=1
-        ;;
 esac
 export CONFIGURATION=${CONFIGURATION:-Release}
-export IS_RUNNING_PACKAGING=${IS_RUNNING_PACKAGING:-0}
 
 # Pre-choose Xcode and Swift versions for those operations that do not set them
 REALM_XCODE_VERSION=${xcode_version:-$REALM_XCODE_VERSION}
@@ -512,8 +518,8 @@ case "$COMMAND" in
 
     "ios-swift")
         sh build.sh ios-dynamic
-        build_combined RealmSwift RealmSwift iphoneos iphonesimulator '' "/swift-$REALM_SWIFT_VERSION"
-        cp -R build/ios/Realm.framework build/ios/swift-$REALM_SWIFT_VERSION
+        build_combined RealmSwift RealmSwift iphoneos iphonesimulator '' "/swift-$REALM_XCODE_VERSION"
+        copy_realm_framework ios
         exit 0
         ;;
 
@@ -524,8 +530,8 @@ case "$COMMAND" in
 
     "watchos-swift")
         sh build.sh watchos
-        build_combined RealmSwift RealmSwift watchos watchsimulator '' "/swift-$REALM_SWIFT_VERSION"
-        cp -R build/watchos/Realm.framework build/watchos/swift-$REALM_SWIFT_VERSION
+        build_combined RealmSwift RealmSwift watchos watchsimulator '' "/swift-$REALM_XCODE_VERSION"
+        copy_realm_framework watchos
         exit 0
         ;;
 
@@ -536,8 +542,8 @@ case "$COMMAND" in
 
     "tvos-swift")
         sh build.sh tvos
-        build_combined RealmSwift RealmSwift appletvos appletvsimulator '' "/swift-$REALM_SWIFT_VERSION"
-        cp -R build/tvos/Realm.framework build/tvos/swift-$REALM_SWIFT_VERSION
+        build_combined RealmSwift RealmSwift appletvos appletvsimulator '' "/swift-$REALM_XCODE_VERSION"
+        copy_realm_framework tvos
         exit 0
         ;;
 
@@ -550,12 +556,183 @@ case "$COMMAND" in
     "osx-swift")
         sh build.sh osx
         xc "-scheme 'RealmSwift' -configuration $CONFIGURATION build"
-        destination="build/osx/swift-$REALM_SWIFT_VERSION"
+        destination="build/osx/swift-$REALM_XCODE_VERSION"
         clean_retrieve "build/DerivedData/Realm/Build/Products/$CONFIGURATION/RealmSwift.framework" "$destination" "RealmSwift.framework"
+        rm -rf "$destination/Realm.framework"
         cp -R build/osx/Realm.framework "$destination"
         exit 0
         ;;
 
+    "catalyst")
+        if (( $(xcode_version_major) < 11 )); then
+            echo 'Building for Catalyst requires Xcode 11'
+            exit 1
+        fi
+
+        xc "-scheme Realm -configuration $CONFIGURATION REALM_CATALYST_FLAGS='-target x86_64-apple-ios13.0-macabi' REALM_PLATFORM_SUFFIX='maccatalyst'"
+        clean_retrieve "build/DerivedData/Realm/Build/Products/$CONFIGURATION/Realm.framework" "build/catalyst" "Realm.framework"
+        ;;
+
+    "catalyst-swift")
+        if (( $(xcode_version_major) < 11 )); then
+            echo 'Building for Catalyst requires Xcode 11'
+            exit 1
+        fi
+
+        sh build.sh catalyst
+        # FIXME: change this to just "-destination variant='Mac Catalyst'" once the CI machines are running 10.15
+        xc "-scheme 'RealmSwift' -configuration $CONFIGURATION build \
+            REALM_CATALYST_FLAGS='-target x86_64-apple-ios13.0-macabi' \
+            REALM_PLATFORM_SUFFIX='maccatalyst' \
+            SWIFT_DEPLOYMENT_TARGET='13.0-macabi' \
+            SWIFT_PLATFORM_TARGET_PREFIX='ios'"
+        destination="build/catalyst/swift-$REALM_XCODE_VERSION"
+        clean_retrieve "build/DerivedData/Realm/Build/Products/$CONFIGURATION/RealmSwift.framework" "$destination" "RealmSwift.framework"
+        rm -rf "$destination/Realm.framework"
+        cp -R build/catalyst/Realm.framework "$destination"
+        ;;
+
+    "xcframework")
+        if (( $(xcode_version_major) < 11 )); then
+            echo 'Building a xcframework requires Xcode 11'
+            exit 1
+        fi
+
+        export REALM_EXTRA_BUILD_ARGUMENTS="$REALM_EXTRA_BUILD_ARGUMENTS BUILD_LIBRARY_FOR_DISTRIBUTION=YES REALM_OBJC_MACH_O_TYPE=staticlib"
+
+        # Build all of the requested frameworks
+        shift
+        PLATFORMS="${*:-osx ios watchos tvos catalyst}"
+        for platform in $PLATFORMS; do
+            sh build.sh $platform-swift
+        done
+
+        # Assemble them into xcframeworks
+        rm -rf build/*.xcframework
+        find build/DerivedData/Realm/Build/Products -name 'Realm.framework' \
+            | grep -v '\-static' \
+            | sed 's/.*/-framework &/' \
+            | xargs xcodebuild -create-xcframework -output build/Realm.xcframework
+        find build/DerivedData/Realm/Build/Products -name 'RealmSwift.framework' \
+            | sed 's/.*/-framework &/' \
+            | xargs xcodebuild -create-xcframework -output build/RealmSwift.xcframework
+
+        # strip-frameworks.sh isn't needed with xcframeworks since we don't
+        # lipo together device/simulator libs
+        find build/Realm.xcframework -name 'strip-frameworks.sh' -delete
+        find build/RealmSwift.xcframework -name 'strip-frameworks.sh' -delete
+
+        # swiftinterface files currently have incorrect name resolution which
+        # results in the RealmSwift.Realm class name clashing with the Realm
+        # module name. Work around this by renaming the Realm module to
+        # RealmObjc. This is safe to do with a pre-built library because the
+        # module name is unrelated to what symbols are exported by an obj-c
+        # library, and we're statically linking the obj-c library into the
+        # swift library so it doesn't need to be loaded at runtime.
+        cd build
+        cp -R Realm.xcframework RealmObjc.xcframework
+        find RealmObjc.xcframework -name 'Realm.framework' \
+            -execdir mv {} RealmObjc.framework \; || true 2> /dev/null
+        find RealmObjc.xcframework -name '*.h' \
+            -exec sed -i '' 's/Realm\//RealmObjc\//' {} \;
+        find RealmObjc.xcframework -name 'module.modulemap' \
+            -exec sed -i '' 's/module Realm/module RealmObjc/' {} \;
+        sed -i '' 's/Realm.framework/RealmObjc.framework/' RealmObjc.xcframework/Info.plist
+
+        find RealmSwift.xcframework -name '*.swiftinterface' \
+            -exec sed -i '' 's/import Realm/import RealmObjc/' {} \;
+        find RealmSwift.xcframework -name '*.swiftinterface' \
+            -exec sed -i '' 's/Realm.RLM/RealmObjc.RLM/g' {} \;
+
+        # Realm is statically linked into RealmSwift so we no longer actually
+        # need the obj-c static library, and just need the framework shell.
+        # Remove everything but placeholder.o so that there's still a library
+        # to link against that just doesn't define any symbols.
+        find RealmObjc.xcframework -name 'Realm' | while read file; do
+            (
+                cd $(dirname $file)
+                if readlink Realm > /dev/null; then
+                    ln -sf Versions/Current/RealmObjc Realm
+                elif lipo -info Realm | grep -q 'Non-fat'; then
+                    ar -t Realm | grep -v placeholder | tr '\n' '\0' | xargs -0 ar -d Realm >/dev/null 2>&1
+                    ranlib Realm >/dev/null 2>&1
+                else
+                    for arch in $(lipo -info Realm | cut -f3 -d':'); do
+                        lipo Realm -thin $arch -output tmp.a
+                        ar -t tmp.a | grep -v placeholder | tr '\n' '\0' | xargs -0 ar -d tmp.a >/dev/null 2>&1
+                        ranlib tmp.a >/dev/null 2>&1
+                        lipo Realm -replace $arch tmp.a -output Realm
+                        rm tmp.a
+                    done
+                fi
+                mv Realm RealmObjc
+            )
+        done
+
+        # We built Realm.framework as a static framework so that we could link
+        # it into RealmSwift.framework and not have to deal with the runtime
+        # implications of renaming the shared library, but we want the end
+        # result to be that Realm.xcframework is a dynamic framework. Our build
+        # system isn't really set up to build both static and dynamic versions
+        # of it, so instead just turn each of the static libraries in
+        # Realm.xcframework into a shared library.
+        cd Realm.xcframework
+        i=0
+        while plist_get Info.plist "AvailableLibraries:$i" > /dev/null; do
+            arch_dir_name="$(plist_get Info.plist "AvailableLibraries:$i:LibraryIdentifier")"
+            platform="$(plist_get Info.plist "AvailableLibraries:$i:SupportedPlatform")"
+            variant="$(plist_get Info.plist "AvailableLibraries:$i:SupportedPlatformVariant" 2> /dev/null || echo 'os')"
+            deployment_target_name="$platform"
+            install_name='@rpath/Realm.framework/Realm'
+            bitcode_flag='-fembed-bitcode'
+            if [ "$variant" = 'simulator' ]; then
+                bitcode_flag=''
+            fi
+            case "$platform" in
+              "macos")   sdk='macosx'; install_name='@rpath/Realm.framework/Versions/A/Realm'; bitcode_flag='';;
+              "ios")     sdk="iphone$variant"; deployment_target_name='iphoneos';;
+              "watchos") sdk="watch$variant";;
+              "tvos")    sdk="appletv$variant";;
+            esac
+            deployment_target=$(grep -i "$deployment_target_name.*_DEPLOYMENT_TARGET" ../../Configuration/Base.xcconfig \
+                                | sed 's/.*= \(.*\);/\1/')
+            architectures=""
+            j=0
+            while plist_get Info.plist "AvailableLibraries:$i:SupportedArchitectures:$j" > /dev/null; do
+                architectures="${architectures} -arch $(plist_get Info.plist "AvailableLibraries:$i:SupportedArchitectures:$j")"
+                j=$(($j + 1))
+            done
+
+            (
+                cd $arch_dir_name/Realm.framework
+                realm_lib=$(readlink Realm || echo 'Realm')
+                # feature_token.cpp.o depends on PKey, which isn't actually
+                # present in the macOS build of the sync library. This normally
+                # works fine because we never reference any symbols from
+                # feature_token.cpp.o so it doesn't get pulled in at all, but
+                # -all_load makes every object file in the input get linked
+                # into the shared library.
+                ar -d $realm_lib feature_token.cpp.o 2> /dev/null || true
+                clang++ -shared $architectures \
+                    -target ${platform}${deployment_target} \
+                    -isysroot $(xcrun --sdk ${sdk} --show-sdk-path) \
+                    -install_name "$install_name" \
+                    -compatibility_version 1 -current_version 1 \
+                    -fapplication-extension \
+                    $bitcode_flag \
+                    -Wl,-all_load \
+                    -Wl,-unexported_symbol,'__Z*' \
+                    -o realm.dylib \
+                    Realm -lz
+                mv realm.dylib $realm_lib
+            )
+
+            i=$(($i + 1))
+        done
+
+        exit 0
+        ;;
+
     ######################################
     # Analysis
     ######################################
@@ -590,25 +767,19 @@ case "$COMMAND" in
         ;;
 
     "test-ios-static")
-        test_ios_static "name=iPhone 6"
+        test_ios_static "name=iPhone 8"
         exit 0
         ;;
 
     "test-ios-dynamic")
-        xc "-scheme Realm -configuration $CONFIGURATION -sdk iphonesimulator -destination 'name=iPhone 6' build"
-        if (( $(xcode_version_major) < 9 )); then
-            xc "-scheme Realm -configuration $CONFIGURATION -sdk iphonesimulator -destination 'name=iPhone 6' test 'ARCHS=\$(ARCHS_STANDARD_32_BIT)'"
-        fi
-        xc "-scheme Realm -configuration $CONFIGURATION -sdk iphonesimulator -destination 'name=iPhone 6' test"
+        xc "-scheme Realm -configuration $CONFIGURATION -sdk iphonesimulator -destination 'name=iPhone 8' build-for-testing"
+        xc "-scheme Realm -configuration $CONFIGURATION -sdk iphonesimulator -destination 'name=iPhone 8' test"
         exit 0
         ;;
 
     "test-ios-swift")
-        xc "-scheme RealmSwift -configuration $CONFIGURATION -sdk iphonesimulator -destination 'name=iPhone 6' build"
-        if (( $(xcode_version_major) < 9 )); then
-            xc "-scheme RealmSwift -configuration $CONFIGURATION -sdk iphonesimulator -destination 'name=iPhone 6' test 'ARCHS=\$(ARCHS_STANDARD_32_BIT)'"
-        fi
-        xc "-scheme RealmSwift -configuration $CONFIGURATION -sdk iphonesimulator -destination 'name=iPhone 6' test"
+        xc "-scheme RealmSwift -configuration $CONFIGURATION -sdk iphonesimulator -destination 'name=iPhone 8' build-for-testing"
+        xc "-scheme RealmSwift -configuration $CONFIGURATION -sdk iphonesimulator -destination 'name=iPhone 8' test"
         exit 0
         ;;
 
@@ -631,21 +802,13 @@ case "$COMMAND" in
         ;;
 
     "test-tvos")
-        if (( $(xcode_version_major) >= 9 )); then
-            destination="Apple TV"
-        else
-            destination="Apple TV 1080p"
-        fi
+        destination="Apple TV"
         xctest "-scheme Realm -configuration $CONFIGURATION -sdk appletvsimulator -destination 'name=$destination'"
         exit $?
         ;;
 
     "test-tvos-swift")
-        if (( $(xcode_version_major) >= 9 )); then
-            destination="Apple TV"
-        else
-            destination="Apple TV 1080p"
-        fi
+        destination="Apple TV"
         xctest "-scheme RealmSwift -configuration $CONFIGURATION -sdk appletvsimulator -destination 'name=$destination'"
         exit $?
         ;;
@@ -673,6 +836,16 @@ case "$COMMAND" in
         exit 0
         ;;
 
+    test-swiftpm*)
+        SANITIZER=$(echo $COMMAND | cut -d - -f 3)
+        if [ -n "$SANITIZER" ]; then
+            SANITIZER="--sanitize $SANITIZER"
+            export ASAN_OPTIONS='check_initialization_order=true:detect_stack_use_after_return=true'
+        fi
+        xcrun swift test --configuration $(echo $CONFIGURATION | tr "[:upper:]" "[:lower:]") $SANITIZER
+        exit 0
+        ;;
+
     ######################################
     # Full verification
     ######################################
@@ -696,6 +869,7 @@ case "$COMMAND" in
         sh build.sh verify-tvos-debug
         sh build.sh verify-tvos-device
         sh build.sh verify-swiftlint
+        sh build.sh verify-swiftpm
         sh build.sh verify-osx-object-server
         ;;
 
@@ -714,6 +888,11 @@ case "$COMMAND" in
           fi
         fi
 
+        sh build.sh verify-cocoapods-ios
+        sh build.sh verify-cocoapods-ios-dynamic
+        sh build.sh verify-cocoapods-osx
+        sh build.sh verify-cocoapods-watchos
+
         # https://github.com/CocoaPods/CocoaPods/issues/7708
         export EXPANDED_CODE_SIGN_IDENTITY=''
         cd examples/installation
@@ -726,6 +905,23 @@ case "$COMMAND" in
         sh build.sh test-watchos-swift-cocoapods
         ;;
 
+    verify-cocoapods-ios-dynamic)
+        PLATFORM=$(echo $COMMAND | cut -d - -f 3)
+        # https://github.com/CocoaPods/CocoaPods/issues/7708
+        export EXPANDED_CODE_SIGN_IDENTITY=''
+        cd examples/installation
+        sh build.sh test-ios-objc-cocoapods-dynamic
+        ;;
+
+    verify-cocoapods-*)
+        PLATFORM=$(echo $COMMAND | cut -d - -f 3)
+        # https://github.com/CocoaPods/CocoaPods/issues/7708
+        export EXPANDED_CODE_SIGN_IDENTITY=''
+        cd examples/installation
+        sh build.sh test-$PLATFORM-objc-cocoapods
+        sh build.sh test-$PLATFORM-swift-cocoapods
+        ;;
+
     "verify-osx-encryption")
         REALM_ENCRYPT_ALL=YES sh build.sh test-osx
         exit 0
@@ -733,7 +929,6 @@ case "$COMMAND" in
 
     "verify-osx")
         sh build.sh test-osx
-        sh build.sh analyze-osx
         sh build.sh examples-osx
 
         (
@@ -749,7 +944,7 @@ case "$COMMAND" in
         ;;
 
     "verify-ios-static")
-        sh build.sh test-ios-static
+        REALM_EXTRA_BUILD_ARGUMENTS="$REALM_EXTRA_BUILD_ARGUMENTS -workspace examples/ios/objc/RealmExamples.xcworkspace" sh build.sh test-ios-static
         sh build.sh examples-ios
         ;;
 
@@ -758,7 +953,7 @@ case "$COMMAND" in
         ;;
 
     "verify-ios-swift")
-        sh build.sh test-ios-swift
+        REALM_EXTRA_BUILD_ARGUMENTS="$REALM_EXTRA_BUILD_ARGUMENTS -workspace examples/ios/swift/RealmExamples.xcworkspace" sh build.sh test-ios-swift
         sh build.sh examples-ios-swift
         ;;
 
@@ -792,8 +987,12 @@ case "$COMMAND" in
 
     "verify-tvos")
         sh build.sh test-tvos
-        sh build.sh test-tvos-swift
         sh build.sh examples-tvos
+        exit 0
+        ;;
+
+    "verify-tvos-swift")
+        sh build.sh test-tvos-swift
         sh build.sh examples-tvos-swift
         exit 0
         ;;
@@ -808,6 +1007,11 @@ case "$COMMAND" in
         exit 0
         ;;
 
+    verify-swiftpm*)
+        sh build.sh test-$(echo $COMMAND | cut -d - -f 2-)
+        exit 0
+        ;;
+
     "verify-osx-object-server")
         sh build.sh test-osx-object-server
         exit 0
@@ -839,17 +1043,17 @@ case "$COMMAND" in
         sh build.sh prelaunch-simulator
         workspace="examples/ios/objc/RealmExamples.xcworkspace"
         pod install --project-directory="$workspace/.." --no-repo-update
-        xc "-workspace $workspace -scheme Simple -configuration $CONFIGURATION -destination 'name=iPhone 6' build ${CODESIGN_PARAMS}"
-        xc "-workspace $workspace -scheme TableView -configuration $CONFIGURATION -destination 'name=iPhone 6' build ${CODESIGN_PARAMS}"
-        xc "-workspace $workspace -scheme Migration -configuration $CONFIGURATION -destination 'name=iPhone 6' build ${CODESIGN_PARAMS}"
-        xc "-workspace $workspace -scheme Backlink -configuration $CONFIGURATION -destination 'name=iPhone 6' build ${CODESIGN_PARAMS}"
-        xc "-workspace $workspace -scheme GroupedTableView -configuration $CONFIGURATION -destination 'name=iPhone 6' build ${CODESIGN_PARAMS}"
-        xc "-workspace $workspace -scheme RACTableView -configuration $CONFIGURATION -destination 'name=iPhone 6' build ${CODESIGN_PARAMS}"
-        xc "-workspace $workspace -scheme Encryption -configuration $CONFIGURATION -destination 'name=iPhone 6' build ${CODESIGN_PARAMS}"
-        xc "-workspace $workspace -scheme Draw -configuration $CONFIGURATION -destination 'name=iPhone 6' build ${CODESIGN_PARAMS}"
+        xc "-workspace $workspace -scheme Simple -configuration $CONFIGURATION -destination 'name=iPhone 8' build ${CODESIGN_PARAMS}"
+        xc "-workspace $workspace -scheme TableView -configuration $CONFIGURATION -destination 'name=iPhone 8' build ${CODESIGN_PARAMS}"
+        xc "-workspace $workspace -scheme Migration -configuration $CONFIGURATION -destination 'name=iPhone 8' build ${CODESIGN_PARAMS}"
+        xc "-workspace $workspace -scheme Backlink -configuration $CONFIGURATION -destination 'name=iPhone 8' build ${CODESIGN_PARAMS}"
+        xc "-workspace $workspace -scheme GroupedTableView -configuration $CONFIGURATION -destination 'name=iPhone 8' build ${CODESIGN_PARAMS}"
+        xc "-workspace $workspace -scheme RACTableView -configuration $CONFIGURATION -destination 'name=iPhone 8' build ${CODESIGN_PARAMS}"
+        xc "-workspace $workspace -scheme Encryption -configuration $CONFIGURATION -destination 'name=iPhone 8' build ${CODESIGN_PARAMS}"
+        xc "-workspace $workspace -scheme Draw -configuration $CONFIGURATION -destination 'name=iPhone 8' build ${CODESIGN_PARAMS}"
 
         if [ ! -z "${JENKINS_HOME}" ]; then
-            xc "-workspace $workspace -scheme Extension -configuration $CONFIGURATION -destination 'name=iPhone 6' build ${CODESIGN_PARAMS}"
+            xc "-workspace $workspace -scheme Extension -configuration $CONFIGURATION -destination 'name=iPhone 8' build ${CODESIGN_PARAMS}"
         fi
 
         exit 0
@@ -859,15 +1063,15 @@ case "$COMMAND" in
         sh build.sh prelaunch-simulator
         workspace="examples/ios/swift/RealmExamples.xcworkspace"
         if [[ ! -d "$workspace" ]]; then
-            workspace="${workspace/swift/swift-$REALM_SWIFT_VERSION}"
+            workspace="${workspace/swift/swift-$REALM_XCODE_VERSION}"
         fi
 
-        xc "-workspace $workspace -scheme Simple -configuration $CONFIGURATION -destination 'name=iPhone 6' build ${CODESIGN_PARAMS}"
-        xc "-workspace $workspace -scheme TableView -configuration $CONFIGURATION -destination 'name=iPhone 6' build ${CODESIGN_PARAMS}"
-        xc "-workspace $workspace -scheme Migration -configuration $CONFIGURATION -destination 'name=iPhone 6' build ${CODESIGN_PARAMS}"
-        xc "-workspace $workspace -scheme Encryption -configuration $CONFIGURATION -destination 'name=iPhone 6' build ${CODESIGN_PARAMS}"
-        xc "-workspace $workspace -scheme Backlink -configuration $CONFIGURATION -destination 'name=iPhone 6' build ${CODESIGN_PARAMS}"
-        xc "-workspace $workspace -scheme GroupedTableView -configuration $CONFIGURATION -destination 'name=iPhone 6' build ${CODESIGN_PARAMS}"
+        xc "-workspace $workspace -scheme Simple -configuration $CONFIGURATION -destination 'name=iPhone 8' build ${CODESIGN_PARAMS}"
+        xc "-workspace $workspace -scheme TableView -configuration $CONFIGURATION -destination 'name=iPhone 8' build ${CODESIGN_PARAMS}"
+        xc "-workspace $workspace -scheme Migration -configuration $CONFIGURATION -destination 'name=iPhone 8' build ${CODESIGN_PARAMS}"
+        xc "-workspace $workspace -scheme Encryption -configuration $CONFIGURATION -destination 'name=iPhone 8' build ${CODESIGN_PARAMS}"
+        xc "-workspace $workspace -scheme Backlink -configuration $CONFIGURATION -destination 'name=iPhone 8' build ${CODESIGN_PARAMS}"
+        xc "-workspace $workspace -scheme GroupedTableView -configuration $CONFIGURATION -destination 'name=iPhone 8' build ${CODESIGN_PARAMS}"
         exit 0
         ;;
 
@@ -877,11 +1081,7 @@ case "$COMMAND" in
 
     "examples-tvos")
         workspace="examples/tvos/objc/RealmExamples.xcworkspace"
-        if (( $(xcode_version_major) >= 9 )); then
-            destination="Apple TV"
-        else
-            destination="Apple TV 1080p"
-        fi
+        destination="Apple TV"
 
         xc "-workspace $workspace -scheme DownloadCache -configuration $CONFIGURATION -destination 'name=$destination' build ${CODESIGN_PARAMS}"
         xc "-workspace $workspace -scheme PreloadedData -configuration $CONFIGURATION -destination 'name=$destination' build ${CODESIGN_PARAMS}"
@@ -891,15 +1091,10 @@ case "$COMMAND" in
     "examples-tvos-swift")
         workspace="examples/tvos/swift/RealmExamples.xcworkspace"
         if [[ ! -d "$workspace" ]]; then
-            workspace="${workspace/swift/swift-$REALM_SWIFT_VERSION}"
-        fi
-
-        if (( $(xcode_version_major) >= 9 )); then
-            destination="Apple TV"
-        else
-            destination="Apple TV 1080p"
+            workspace="${workspace/swift/swift-$REALM_XCODE_VERSION}"
         fi
 
+        destination="Apple TV"
         xc "-workspace $workspace -scheme DownloadCache -configuration $CONFIGURATION -destination 'name=$destination' build ${CODESIGN_PARAMS}"
         xc "-workspace $workspace -scheme PreloadedData -configuration $CONFIGURATION -destination 'name=$destination' build ${CODESIGN_PARAMS}"
         exit 0
@@ -909,8 +1104,7 @@ case "$COMMAND" in
     # Versioning
     ######################################
     "get-version")
-        version_file="Realm/Realm-Info.plist"
-        echo "$(PlistBuddy -c "Print :CFBundleShortVersionString" "$version_file")"
+        echo "$(plist_get 'Realm/Realm-Info.plist' 'CFBundleShortVersionString')"
         exit 0
         ;;
 
@@ -930,6 +1124,8 @@ case "$COMMAND" in
             PlistBuddy -c "Set :CFBundleShortVersionString $realm_version" "$version_file"
         done
         sed -i '' "s/^VERSION=.*/VERSION=$realm_version/" dependencies.list
+        sed -i '' "s/^let coreVersionStr =.*/let coreVersionStr = \"$REALM_CORE_VERSION\"/" Package.swift
+        sed -i '' "s/^let cocoaVersionStr =.*/let cocoaVersionStr = \"$realm_version\"/" Package.swift
         exit 0
         ;;
 
@@ -1056,7 +1252,9 @@ EOM
             export sha=$GITHUB_PR_SOURCE_BRANCH
             export CONFIGURATION=$configuration
             export REALM_EXTRA_BUILD_ARGUMENTS='GCC_GENERATE_DEBUGGING_SYMBOLS=NO -allowProvisioningUpdates'
-            sh build.sh prelaunch-simulator
+            if [[ ${target} != *"osx"* ]];then
+                sh build.sh prelaunch-simulator
+            fi
 
             source $(brew --prefix nvm)/nvm.sh
             export REALM_NODE_PATH="$(nvm which 8)"
@@ -1107,12 +1305,11 @@ EOM
         zip --symlinks -r realm-examples.zip examples -x "examples/installation/*"
         ;;
 
-    "package-test-examples")
+    "package-test-examples-objc")
         if ! VERSION=$(echo realm-objc-*.zip | egrep -o '\d*\.\d*\.\d*-[a-z]*(\.\d*)?'); then
             VERSION=$(echo realm-objc-*.zip | egrep -o '\d*\.\d*\.\d*')
         fi
         OBJC="realm-objc-${VERSION}"
-        SWIFT="realm-swift-${VERSION}"
         unzip ${OBJC}.zip
 
         cp $0 ${OBJC}
@@ -1123,7 +1320,13 @@ EOM
         sh build.sh examples-osx
         cd ..
         rm -rf ${OBJC}
+        ;;
 
+    "package-test-examples-swift")
+        if ! VERSION=$(echo realm-swift-*.zip | egrep -o '\d*\.\d*\.\d*-[a-z]*(\.\d*)?'); then
+            VERSION=$(echo realm-swift-*.zip | egrep -o '\d*\.\d*\.\d*')
+        fi
+        SWIFT="realm-swift-${VERSION}"
         unzip ${SWIFT}.zip
 
         cp $0 ${SWIFT}
@@ -1143,124 +1346,21 @@ EOM
         zip --symlinks -r realm-framework-ios-static.zip Realm.framework
         ;;
 
-    "package-ios")
-        sh build.sh prelaunch-simulator
-        sh build.sh ios-dynamic
-        cd build/ios
-        zip --symlinks -r realm-framework-ios.zip Realm.framework
-        ;;
+    "package")
+        PLATFORM="$2"
+        REALM_SWIFT_VERSION=
 
-    "package-osx")
-        sh build.sh osx
-
-        cd build/DerivedData/Realm/Build/Products/Release
-        zip --symlinks -r realm-framework-osx.zip Realm.framework
-        ;;
-
-    "package-watchos")
-        sh build.sh prelaunch-simulator
-        sh build.sh watchos
-
-        # If we're building the obj-c library with an Xcode version older than
-        # 10, we need to also build the arm64_32 slice with Xcode 10 and lipo
-        # it in
-        if (( $(xcode_version_major) < 10 )); then
-            (
-                REALM_XCODE_VERSION=10.0
-                REALM_SWIFT_VERSION=
-                set_xcode_and_swift_versions
-                sh build.sh prelaunch-simulator
-                xc "-scheme Realm -configuration $CONFIGURATION -sdk watchos ARCHS='arm64_32'"
-                cp build/DerivedData/Realm/Build/Products/Release-watchos/Realm.framework/*.bcsymbolmap build/watchos/Realm.framework
-                xcrun lipo \
-                  -create build/watchos/Realm.framework/Realm build/DerivedData/Realm/Build/Products/Release-watchos/Realm.framework/Realm \
-                  -output build/watchos-tmp
-                mv build/watchos-tmp build/watchos/Realm.framework/Realm
-            )
-        fi
-
-        cd build/watchos
-        zip --symlinks -r realm-framework-watchos.zip Realm.framework
-        ;;
-
-    "package-tvos")
-        sh build.sh prelaunch-simulator
-        sh build.sh tvos
-
-        cd build/tvos
-        zip --symlinks -r realm-framework-tvos.zip Realm.framework
-        ;;
+        set_xcode_and_swift_versions
 
-    package-*-swift)
-        PLATFORM=$(echo $COMMAND | cut -d - -f 2)
-        for version in 9.2 9.3 9.4 10.0 10.1; do
-            REALM_XCODE_VERSION=$version
-            REALM_SWIFT_VERSION=
-            set_xcode_and_swift_versions
+        if [[ "$PLATFORM" = "catalyst" ]] && (( $(xcode_version_major) < 11 )); then
+            mkdir -p build/catalyst/swift-$REALM_XCODE_VERSION
+        else
             sh build.sh prelaunch-simulator
             sh build.sh $PLATFORM-swift
-        done
-
-        cd build/$PLATFORM
-        ln -s swift-4.0.3 swift-3.2.3
-        ln -s swift-4.1 swift-3.3
-        ln -s swift-4.1.2 swift-3.3.2
-        ln -s swift-4.2 swift-3.4
-        ln -s swift-4.2.1 swift-3.4.1
-        zip --symlinks -r realm-swift-framework-$PLATFORM.zip swift-3.2.3 swift-3.3 swift-3.3.2 swift-3.4 swift-3.4.1 swift-4.0.3 swift-4.1 swift-4.1.2 swift-4.2 swift-4.2.1
-        ;;
-
-    package-*-swift-3.2.3)
-        PLATFORM=$(echo $COMMAND | cut -d - -f 2)
-        mkdir -p build/$PLATFORM
-        cd build/$PLATFORM
-        ln -s swift-4.0.2 swift-3.2.3
-        zip --symlinks -r realm-swift-framework-$PLATFORM-swift-3.2.3.zip swift-3.2.3
-        ;;
-
-    package-*-swift-3.3)
-        PLATFORM=$(echo $COMMAND | cut -d - -f 2)
-        mkdir -p build/$PLATFORM
-        cd build/$PLATFORM
-        ln -s swift-4.1 swift-3.3
-        zip --symlinks -r realm-swift-framework-$PLATFORM-swift-3.3.zip swift-3.3
-        ;;
-
-    package-*-swift-3.3.2)
-        PLATFORM=$(echo $COMMAND | cut -d - -f 2)
-        mkdir -p build/$PLATFORM
-        cd build/$PLATFORM
-        ln -s swift-4.1.2 swift-3.3.2
-        zip --symlinks -r realm-swift-framework-$PLATFORM-swift-3.3.2.zip swift-3.3.2
-        ;;
-
-    package-*-swift-3.4)
-        PLATFORM=$(echo $COMMAND | cut -d - -f 2)
-        mkdir -p build/$PLATFORM
-        cd build/$PLATFORM
-        ln -s swift-4.2 swift-3.4
-        zip --symlinks -r realm-swift-framework-$PLATFORM-swift-3.4.zip swift-3.4
-        ;;
-
-    package-*-swift-3.4.1)
-        PLATFORM=$(echo $COMMAND | cut -d - -f 2)
-        mkdir -p build/$PLATFORM
-        cd build/$PLATFORM
-        ln -s swift-4.2.1 swift-3.4.1
-        zip --symlinks -r realm-swift-framework-$PLATFORM-swift-3.4.1.zip swift-3.4.1
-        ;;
-
-    package-*-swift-*)
-        PLATFORM=$(echo $COMMAND | cut -d - -f 2)
-        REALM_SWIFT_VERSION=$(echo $COMMAND | cut -d - -f 4)
-        REALM_XCODE_VERSION=
-
-        set_xcode_and_swift_versions
-        sh build.sh prelaunch-simulator
-        sh build.sh $PLATFORM-swift
+        fi
 
         cd build/$PLATFORM
-        zip --symlinks -r realm-swift-framework-$PLATFORM-swift-$REALM_SWIFT_VERSION.zip swift-$REALM_SWIFT_VERSION
+        zip --symlinks -r realm-framework-$PLATFORM-$REALM_XCODE_VERSION.zip swift-$REALM_XCODE_VERSION
         ;;
 
     "package-release")
@@ -1278,58 +1378,20 @@ EOM
             mkdir -p ${FOLDER}/ios/dynamic
             mkdir -p ${FOLDER}/Swift
 
-            (
-                cd ${FOLDER}/osx
-                unzip ${WORKSPACE}/realm-framework-osx.zip
-            )
-
-            (
-                cd ${FOLDER}/ios/static
-                unzip ${WORKSPACE}/realm-framework-ios-static.zip
-            )
-
-            (
-                cd ${FOLDER}/ios/dynamic
-                unzip ${WORKSPACE}/realm-framework-ios.zip
-            )
+            unzip ${WORKSPACE}/realm-framework-ios-static.zip -d ${FOLDER}/ios/static
+            for platform in osx ios watchos tvos catalyst; do
+                unzip ${WORKSPACE}/realm-framework-${platform}-${REALM_XCODE_VERSION}.zip -d ${FOLDER}/${platform}
+                mv ${FOLDER}/${platform}/swift-*/Realm.framework ${FOLDER}/${platform}
+                rm -r ${FOLDER}/${platform}/swift-*
+            done
 
-            (
-                cd ${FOLDER}/watchos
-                unzip ${WORKSPACE}/realm-framework-watchos.zip
-            )
-
-            (
-                cd ${FOLDER}/tvos
-                unzip ${WORKSPACE}/realm-framework-tvos.zip
-            )
+            mv ${FOLDER}/ios/Realm.framework ${FOLDER}/ios/dynamic
         else
-            (
-                cd ${FOLDER}/osx
-                for f in ${WORKSPACE}/realm-swift-framework-osx-swift-*.zip; do
-                    unzip "$f"
-                done
-            )
-
-            (
-                cd ${FOLDER}/ios
-                for f in ${WORKSPACE}/realm-swift-framework-ios-swift-*.zip; do
-                    unzip "$f"
-                done
-            )
-
-            (
-                cd ${FOLDER}/watchos
-                for f in ${WORKSPACE}/realm-swift-framework-watchos-swift-*.zip; do
-                    unzip "$f"
-                done
-            )
-
-            (
-                cd ${FOLDER}/tvos
-                for f in ${WORKSPACE}/realm-swift-framework-tvos-swift-*.zip; do
-                    unzip "$f"
-                done
-            )
+            for platform in osx ios watchos tvos catalyst; do
+                find ${WORKSPACE} -name "realm-framework-$platform-*.zip" \
+                                  -maxdepth 1 \
+                                  -exec unzip {} -d ${FOLDER}/${platform} \;
+            done
         fi
 
         (
@@ -1392,40 +1454,37 @@ EOF
 
         echo 'Packaging iOS'
         sh build.sh package-ios-static
-        cp build/ios-static/realm-framework-ios-static.zip ..
-        sh build.sh package-ios
-        cp build/ios/realm-framework-ios.zip ..
-        sh build.sh package-ios-swift
-        cp build/ios/realm-swift-framework-ios.zip ..
-
-        echo 'Packaging OS X'
-        sh build.sh package-osx
-        cp build/DerivedData/Realm/Build/Products/Release/realm-framework-osx.zip ..
-        sh build.sh package-osx-swift
-        cp build/osx/realm-swift-framework-osx.zip ..
+        cp build/ios-static/realm-framework-ios-static.zip .
+        sh build.sh package ios
+        cp build/ios/realm-framework-ios-$REALM_XCODE_VERSION.zip .
+
+        echo 'Packaging macOS'
+        sh build.sh package osx
+        cp build/osx/realm-framework-osx-$REALM_XCODE_VERSION.zip .
 
         echo 'Packaging watchOS'
-        sh build.sh package-watchos
-        cp build/watchos/realm-framework-watchos.zip ..
-        sh build.sh package-watchos-swift
-        cp build/watchos/realm-swift-framework-watchos.zip ..
+        sh build.sh package watchos
+        cp build/watchos/realm-framework-watchos-$REALM_XCODE_VERSION.zip .
 
         echo 'Packaging tvOS'
-        sh build.sh package-tvos
-        cp build/tvos/realm-framework-tvos.zip ..
-        sh build.sh package-tvos-swift
-        cp build/tvos/realm-swift-framework-tvos.zip ..
+        sh build.sh package tvos
+        cp build/tvos/realm-framework-tvos-$REALM_XCODE_VERSION.zip .
+
+        echo 'Packaging Catalyst'
+        sh build.sh package catalyst
+        cp build/catalyst/realm-framework-catalyst-$REALM_XCODE_VERSION.zip .
 
         echo 'Packaging examples'
         sh build.sh package-examples
-        cp realm-examples.zip ..
 
         echo 'Building final release packages'
+        export WORKSPACE="${WORKSPACE}/realm-cocoa"
         sh build.sh package-release objc
         sh build.sh package-release swift
 
         echo 'Testing packaged examples'
-        sh build.sh package-test-examples
+        sh build.sh package-test-examples-objc
+        sh build.sh package-test-examples-swift
         ;;
 
     "github-release")
@@ -1451,8 +1510,14 @@ x.y.z Release notes (yyyy-MM-dd)
 
 ### Compatibility
 * File format: Generates Realms with format v9 (Reads and upgrades all previous formats)
-* Realm Object Server: 3.11.0 or later.
-* APIs are backwards compatible with all previous releases in the 3.x.y series.
+* Realm Object Server: 3.21.0 or later.
+* APIs are backwards compatible with all previous releases in the 4.x.y series.
+* Carthage release for Swift is built with Xcode 11.3.
+
+### Internal
+Upgraded realm-core from ? to ?
+Upgraded realm-sync from ? to ?
+
 EOS)
         changelog=$(cat CHANGELOG.md)
         echo "$empty_section" > CHANGELOG.md
diff --git a/Pods/Target Support Files/CocoaAsyncSocket/CocoaAsyncSocket-dummy.m b/Pods/Target Support Files/CocoaAsyncSocket/CocoaAsyncSocket-dummy.m
new file mode 100644
index 0000000..6b5b167
--- /dev/null
+++ b/Pods/Target Support Files/CocoaAsyncSocket/CocoaAsyncSocket-dummy.m	
@@ -0,0 +1,5 @@
+#import <Foundation/Foundation.h>
+@interface PodsDummy_CocoaAsyncSocket : NSObject
+@end
+@implementation PodsDummy_CocoaAsyncSocket
+@end
diff --git a/Pods/Target Support Files/CocoaAsyncSocket/CocoaAsyncSocket-prefix.pch b/Pods/Target Support Files/CocoaAsyncSocket/CocoaAsyncSocket-prefix.pch
new file mode 100644
index 0000000..082f8af
--- /dev/null
+++ b/Pods/Target Support Files/CocoaAsyncSocket/CocoaAsyncSocket-prefix.pch	
@@ -0,0 +1,12 @@
+#ifdef __OBJC__
+#import <Cocoa/Cocoa.h>
+#else
+#ifndef FOUNDATION_EXPORT
+#if defined(__cplusplus)
+#define FOUNDATION_EXPORT extern "C"
+#else
+#define FOUNDATION_EXPORT extern
+#endif
+#endif
+#endif
+
diff --git a/Pods/Target Support Files/CocoaAsyncSocket/CocoaAsyncSocket-umbrella.h b/Pods/Target Support Files/CocoaAsyncSocket/CocoaAsyncSocket-umbrella.h
new file mode 100644
index 0000000..8ba7f48
--- /dev/null
+++ b/Pods/Target Support Files/CocoaAsyncSocket/CocoaAsyncSocket-umbrella.h	
@@ -0,0 +1,18 @@
+#ifdef __OBJC__
+#import <Cocoa/Cocoa.h>
+#else
+#ifndef FOUNDATION_EXPORT
+#if defined(__cplusplus)
+#define FOUNDATION_EXPORT extern "C"
+#else
+#define FOUNDATION_EXPORT extern
+#endif
+#endif
+#endif
+
+#import "GCDAsyncSocket.h"
+#import "GCDAsyncUdpSocket.h"
+
+FOUNDATION_EXPORT double CocoaAsyncSocketVersionNumber;
+FOUNDATION_EXPORT const unsigned char CocoaAsyncSocketVersionString[];
+
diff --git a/Pods/Target Support Files/CocoaAsyncSocket/CocoaAsyncSocket.modulemap b/Pods/Target Support Files/CocoaAsyncSocket/CocoaAsyncSocket.modulemap
new file mode 100644
index 0000000..ec550b0
--- /dev/null
+++ b/Pods/Target Support Files/CocoaAsyncSocket/CocoaAsyncSocket.modulemap	
@@ -0,0 +1,6 @@
+framework module CocoaAsyncSocket {
+  umbrella header "CocoaAsyncSocket-umbrella.h"
+
+  export *
+  module * { export * }
+}
diff --git a/Pods/Target Support Files/CocoaAsyncSocket/CocoaAsyncSocket.xcconfig b/Pods/Target Support Files/CocoaAsyncSocket/CocoaAsyncSocket.xcconfig
new file mode 100644
index 0000000..4ca55fa
--- /dev/null
+++ b/Pods/Target Support Files/CocoaAsyncSocket/CocoaAsyncSocket.xcconfig	
@@ -0,0 +1,11 @@
+CODE_SIGN_IDENTITY =
+CONFIGURATION_BUILD_DIR = ${PODS_CONFIGURATION_BUILD_DIR}/CocoaAsyncSocket
+GCC_PREPROCESSOR_DEFINITIONS = $(inherited) COCOAPODS=1
+HEADER_SEARCH_PATHS = "${PODS_ROOT}/Headers/Private" "${PODS_ROOT}/Headers/Public"
+OTHER_LDFLAGS = -framework "CoreServices" -framework "Security"
+PODS_BUILD_DIR = ${BUILD_DIR}
+PODS_CONFIGURATION_BUILD_DIR = ${PODS_BUILD_DIR}/$(CONFIGURATION)$(EFFECTIVE_PLATFORM_NAME)
+PODS_ROOT = ${SRCROOT}
+PODS_TARGET_SRCROOT = ${PODS_ROOT}/CocoaAsyncSocket
+PRODUCT_BUNDLE_IDENTIFIER = org.cocoapods.${PRODUCT_NAME:rfc1034identifier}
+SKIP_INSTALL = YES
diff --git a/Pods/Target Support Files/CocoaAsyncSocket/Info.plist b/Pods/Target Support Files/CocoaAsyncSocket/Info.plist
new file mode 100644
index 0000000..55c676b
--- /dev/null
+++ b/Pods/Target Support Files/CocoaAsyncSocket/Info.plist	
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+  <key>CFBundleDevelopmentRegion</key>
+  <string>en</string>
+  <key>CFBundleExecutable</key>
+  <string>${EXECUTABLE_NAME}</string>
+  <key>CFBundleIdentifier</key>
+  <string>${PRODUCT_BUNDLE_IDENTIFIER}</string>
+  <key>CFBundleInfoDictionaryVersion</key>
+  <string>6.0</string>
+  <key>CFBundleName</key>
+  <string>${PRODUCT_NAME}</string>
+  <key>CFBundlePackageType</key>
+  <string>FMWK</string>
+  <key>CFBundleShortVersionString</key>
+  <string>7.6.3</string>
+  <key>CFBundleSignature</key>
+  <string>????</string>
+  <key>CFBundleVersion</key>
+  <string>${CURRENT_PROJECT_VERSION}</string>
+  <key>NSPrincipalClass</key>
+  <string></string>
+</dict>
+</plist>
diff --git a/Pods/Target Support Files/HTTPParserC/HTTPParserC-dummy.m b/Pods/Target Support Files/HTTPParserC/HTTPParserC-dummy.m
new file mode 100644
index 0000000..58225db
--- /dev/null
+++ b/Pods/Target Support Files/HTTPParserC/HTTPParserC-dummy.m	
@@ -0,0 +1,5 @@
+#import <Foundation/Foundation.h>
+@interface PodsDummy_HTTPParserC : NSObject
+@end
+@implementation PodsDummy_HTTPParserC
+@end
diff --git a/Pods/Target Support Files/HTTPParserC/HTTPParserC-prefix.pch b/Pods/Target Support Files/HTTPParserC/HTTPParserC-prefix.pch
new file mode 100644
index 0000000..082f8af
--- /dev/null
+++ b/Pods/Target Support Files/HTTPParserC/HTTPParserC-prefix.pch	
@@ -0,0 +1,12 @@
+#ifdef __OBJC__
+#import <Cocoa/Cocoa.h>
+#else
+#ifndef FOUNDATION_EXPORT
+#if defined(__cplusplus)
+#define FOUNDATION_EXPORT extern "C"
+#else
+#define FOUNDATION_EXPORT extern
+#endif
+#endif
+#endif
+
diff --git a/Pods/Target Support Files/HTTPParserC/HTTPParserC-umbrella.h b/Pods/Target Support Files/HTTPParserC/HTTPParserC-umbrella.h
new file mode 100644
index 0000000..f3dfcd7
--- /dev/null
+++ b/Pods/Target Support Files/HTTPParserC/HTTPParserC-umbrella.h	
@@ -0,0 +1,17 @@
+#ifdef __OBJC__
+#import <Cocoa/Cocoa.h>
+#else
+#ifndef FOUNDATION_EXPORT
+#if defined(__cplusplus)
+#define FOUNDATION_EXPORT extern "C"
+#else
+#define FOUNDATION_EXPORT extern
+#endif
+#endif
+#endif
+
+#import "http_parser.h"
+
+FOUNDATION_EXPORT double HTTPParserCVersionNumber;
+FOUNDATION_EXPORT const unsigned char HTTPParserCVersionString[];
+
diff --git a/Pods/Target Support Files/HTTPParserC/HTTPParserC.modulemap b/Pods/Target Support Files/HTTPParserC/HTTPParserC.modulemap
new file mode 100644
index 0000000..8a23ecb
--- /dev/null
+++ b/Pods/Target Support Files/HTTPParserC/HTTPParserC.modulemap	
@@ -0,0 +1,6 @@
+framework module HTTPParserC {
+  umbrella header "HTTPParserC-umbrella.h"
+
+  export *
+  module * { export * }
+}
diff --git a/Pods/Target Support Files/HTTPParserC/HTTPParserC.xcconfig b/Pods/Target Support Files/HTTPParserC/HTTPParserC.xcconfig
new file mode 100644
index 0000000..adc5353
--- /dev/null
+++ b/Pods/Target Support Files/HTTPParserC/HTTPParserC.xcconfig	
@@ -0,0 +1,11 @@
+CODE_SIGN_IDENTITY =
+CONFIGURATION_BUILD_DIR = ${PODS_CONFIGURATION_BUILD_DIR}/HTTPParserC
+GCC_PREPROCESSOR_DEFINITIONS = $(inherited) COCOAPODS=1
+HEADER_SEARCH_PATHS = "${PODS_ROOT}/Headers/Private" "${PODS_ROOT}/Headers/Public"
+PODS_BUILD_DIR = ${BUILD_DIR}
+PODS_CONFIGURATION_BUILD_DIR = ${PODS_BUILD_DIR}/$(CONFIGURATION)$(EFFECTIVE_PLATFORM_NAME)
+PODS_ROOT = ${SRCROOT}
+PODS_TARGET_SRCROOT = ${PODS_ROOT}/HTTPParserC
+PRODUCT_BUNDLE_IDENTIFIER = org.cocoapods.${PRODUCT_NAME:rfc1034identifier}
+SKIP_INSTALL = YES
+SWIFT_INCLUDE_PATHS = $(SRCROOT)/HTTPParserC/Sources/**
diff --git a/Pods/Target Support Files/HTTPParserC/Info.plist b/Pods/Target Support Files/HTTPParserC/Info.plist
new file mode 100644
index 0000000..f1c636a
--- /dev/null
+++ b/Pods/Target Support Files/HTTPParserC/Info.plist	
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+  <key>CFBundleDevelopmentRegion</key>
+  <string>en</string>
+  <key>CFBundleExecutable</key>
+  <string>${EXECUTABLE_NAME}</string>
+  <key>CFBundleIdentifier</key>
+  <string>${PRODUCT_BUNDLE_IDENTIFIER}</string>
+  <key>CFBundleInfoDictionaryVersion</key>
+  <string>6.0</string>
+  <key>CFBundleName</key>
+  <string>${PRODUCT_NAME}</string>
+  <key>CFBundlePackageType</key>
+  <string>FMWK</string>
+  <key>CFBundleShortVersionString</key>
+  <string>2.9.2</string>
+  <key>CFBundleSignature</key>
+  <string>????</string>
+  <key>CFBundleVersion</key>
+  <string>${CURRENT_PROJECT_VERSION}</string>
+  <key>NSPrincipalClass</key>
+  <string></string>
+</dict>
+</plist>
diff --git a/Pods/Target Support Files/Pods-Jared/Pods-Jared-acknowledgements.markdown b/Pods/Target Support Files/Pods-Jared/Pods-Jared-acknowledgements.markdown
index 7c0c45e..8a24edd 100644
--- a/Pods/Target Support Files/Pods-Jared/Pods-Jared-acknowledgements.markdown	
+++ b/Pods/Target Support Files/Pods-Jared/Pods-Jared-acknowledgements.markdown	
@@ -1,6 +1,45 @@
 # Acknowledgements
 This application makes use of the following third party libraries:
 
+## CocoaAsyncSocket
+
+Public Domain License
+
+The CocoaAsyncSocket project is in the public domain.
+
+The original TCP version (AsyncSocket) was created by Dustin Voss in January 2003.
+Updated and maintained by Deusty LLC and the Apple development community.
+
+
+## HTTPParserC
+
+MIT License
+
+http_parser.c is based on src/http/ngx_http_parse.c
+from NGINX copyright Igor Sysoev.
+
+Additional changes are licensed under the same terms as NGINX and
+copyright Joyent, Inc. and other Node contributors. All rights reserved.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to
+deal in the Software without restriction, including without limitation the
+rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+sell copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+IN THE SOFTWARE. 
+
+
 ## Realm
 
 TABLE OF CONTENTS
@@ -504,4 +543,29 @@ or authorize the transfer of, directly or indirectly, of the Software to any
 Prohibited Jurisdiction, or otherwise in violation of any such restrictions or
 regulations.
 
+
+## Telegraph
+
+MIT License
+
+Copyright (c) 2018 Building42, Yvo van Beek, Bernd de Graaf
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
 Generated by CocoaPods - https://cocoapods.org
diff --git a/Pods/Target Support Files/Pods-Jared/Pods-Jared-acknowledgements.plist b/Pods/Target Support Files/Pods-Jared/Pods-Jared-acknowledgements.plist
index 1909027..f3aba5f 100644
--- a/Pods/Target Support Files/Pods-Jared/Pods-Jared-acknowledgements.plist	
+++ b/Pods/Target Support Files/Pods-Jared/Pods-Jared-acknowledgements.plist	
@@ -12,6 +12,57 @@
 			<key>Type</key>
 			<string>PSGroupSpecifier</string>
 		</dict>
+		<dict>
+			<key>FooterText</key>
+			<string>Public Domain License
+
+The CocoaAsyncSocket project is in the public domain.
+
+The original TCP version (AsyncSocket) was created by Dustin Voss in January 2003.
+Updated and maintained by Deusty LLC and the Apple development community.
+</string>
+			<key>License</key>
+			<string>public domain</string>
+			<key>Title</key>
+			<string>CocoaAsyncSocket</string>
+			<key>Type</key>
+			<string>PSGroupSpecifier</string>
+		</dict>
+		<dict>
+			<key>FooterText</key>
+			<string>MIT License
+
+http_parser.c is based on src/http/ngx_http_parse.c
+from NGINX copyright Igor Sysoev.
+
+Additional changes are licensed under the same terms as NGINX and
+copyright Joyent, Inc. and other Node contributors. All rights reserved.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to
+deal in the Software without restriction, including without limitation the
+rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+sell copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+IN THE SOFTWARE. 
+</string>
+			<key>License</key>
+			<string>MIT</string>
+			<key>Title</key>
+			<string>HTTPParserC</string>
+			<key>Type</key>
+			<string>PSGroupSpecifier</string>
+		</dict>
 		<dict>
 			<key>FooterText</key>
 			<string>TABLE OF CONTENTS
@@ -528,6 +579,37 @@ regulations.
 			<key>Type</key>
 			<string>PSGroupSpecifier</string>
 		</dict>
+		<dict>
+			<key>FooterText</key>
+			<string>MIT License
+
+Copyright (c) 2018 Building42, Yvo van Beek, Bernd de Graaf
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+</string>
+			<key>License</key>
+			<string>MIT</string>
+			<key>Title</key>
+			<string>Telegraph</string>
+			<key>Type</key>
+			<string>PSGroupSpecifier</string>
+		</dict>
 		<dict>
 			<key>FooterText</key>
 			<string>Generated by CocoaPods - https://cocoapods.org</string>
diff --git a/Pods/Target Support Files/Pods-Jared/Pods-Jared-frameworks.sh b/Pods/Target Support Files/Pods-Jared/Pods-Jared-frameworks.sh
index 300d553..8957a75 100755
--- a/Pods/Target Support Files/Pods-Jared/Pods-Jared-frameworks.sh	
+++ b/Pods/Target Support Files/Pods-Jared/Pods-Jared-frameworks.sh	
@@ -134,12 +134,18 @@ strip_invalid_archs() {
 
 
 if [[ "$CONFIGURATION" == "Debug" ]]; then
+  install_framework "${BUILT_PRODUCTS_DIR}/CocoaAsyncSocket/CocoaAsyncSocket.framework"
+  install_framework "${BUILT_PRODUCTS_DIR}/HTTPParserC/HTTPParserC.framework"
   install_framework "${BUILT_PRODUCTS_DIR}/Realm/Realm.framework"
   install_framework "${BUILT_PRODUCTS_DIR}/RealmSwift/RealmSwift.framework"
+  install_framework "${BUILT_PRODUCTS_DIR}/Telegraph/Telegraph.framework"
 fi
 if [[ "$CONFIGURATION" == "Release" ]]; then
+  install_framework "${BUILT_PRODUCTS_DIR}/CocoaAsyncSocket/CocoaAsyncSocket.framework"
+  install_framework "${BUILT_PRODUCTS_DIR}/HTTPParserC/HTTPParserC.framework"
   install_framework "${BUILT_PRODUCTS_DIR}/Realm/Realm.framework"
   install_framework "${BUILT_PRODUCTS_DIR}/RealmSwift/RealmSwift.framework"
+  install_framework "${BUILT_PRODUCTS_DIR}/Telegraph/Telegraph.framework"
 fi
 if [ "${COCOAPODS_PARALLEL_CODE_SIGN}" == "true" ]; then
   wait
diff --git a/Pods/Target Support Files/Pods-Jared/Pods-Jared.debug.xcconfig b/Pods/Target Support Files/Pods-Jared/Pods-Jared.debug.xcconfig
index a2b0008..e586fd2 100644
--- a/Pods/Target Support Files/Pods-Jared/Pods-Jared.debug.xcconfig	
+++ b/Pods/Target Support Files/Pods-Jared/Pods-Jared.debug.xcconfig	
@@ -1,10 +1,10 @@
 ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES
 CODE_SIGN_IDENTITY =
-FRAMEWORK_SEARCH_PATHS = $(inherited) "${PODS_CONFIGURATION_BUILD_DIR}/Realm" "${PODS_CONFIGURATION_BUILD_DIR}/RealmSwift"
+FRAMEWORK_SEARCH_PATHS = $(inherited) "${PODS_CONFIGURATION_BUILD_DIR}/CocoaAsyncSocket" "${PODS_CONFIGURATION_BUILD_DIR}/HTTPParserC" "${PODS_CONFIGURATION_BUILD_DIR}/Realm" "${PODS_CONFIGURATION_BUILD_DIR}/RealmSwift" "${PODS_CONFIGURATION_BUILD_DIR}/Telegraph"
 GCC_PREPROCESSOR_DEFINITIONS = $(inherited) COCOAPODS=1
 LD_RUNPATH_SEARCH_PATHS = $(inherited) '@executable_path/../Frameworks' '@loader_path/Frameworks'
-OTHER_CFLAGS = $(inherited) -iquote "${PODS_CONFIGURATION_BUILD_DIR}/Realm/Realm.framework/Headers" -iquote "${PODS_CONFIGURATION_BUILD_DIR}/RealmSwift/RealmSwift.framework/Headers"
-OTHER_LDFLAGS = $(inherited) -ObjC -framework "Realm" -framework "RealmSwift"
+OTHER_CFLAGS = $(inherited) -iquote "${PODS_CONFIGURATION_BUILD_DIR}/CocoaAsyncSocket/CocoaAsyncSocket.framework/Headers" -iquote "${PODS_CONFIGURATION_BUILD_DIR}/HTTPParserC/HTTPParserC.framework/Headers" -iquote "${PODS_CONFIGURATION_BUILD_DIR}/Realm/Realm.framework/Headers" -iquote "${PODS_CONFIGURATION_BUILD_DIR}/RealmSwift/RealmSwift.framework/Headers" -iquote "${PODS_CONFIGURATION_BUILD_DIR}/Telegraph/Telegraph.framework/Headers"
+OTHER_LDFLAGS = $(inherited) -ObjC -framework "CocoaAsyncSocket" -framework "HTTPParserC" -framework "Realm" -framework "RealmSwift" -framework "Telegraph"
 OTHER_SWIFT_FLAGS = $(inherited) "-D" "COCOAPODS"
 PODS_BUILD_DIR = ${BUILD_DIR}
 PODS_CONFIGURATION_BUILD_DIR = ${PODS_BUILD_DIR}/$(CONFIGURATION)$(EFFECTIVE_PLATFORM_NAME)
diff --git a/Pods/Target Support Files/Pods-Jared/Pods-Jared.release.xcconfig b/Pods/Target Support Files/Pods-Jared/Pods-Jared.release.xcconfig
index a2b0008..e586fd2 100644
--- a/Pods/Target Support Files/Pods-Jared/Pods-Jared.release.xcconfig	
+++ b/Pods/Target Support Files/Pods-Jared/Pods-Jared.release.xcconfig	
@@ -1,10 +1,10 @@
 ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES
 CODE_SIGN_IDENTITY =
-FRAMEWORK_SEARCH_PATHS = $(inherited) "${PODS_CONFIGURATION_BUILD_DIR}/Realm" "${PODS_CONFIGURATION_BUILD_DIR}/RealmSwift"
+FRAMEWORK_SEARCH_PATHS = $(inherited) "${PODS_CONFIGURATION_BUILD_DIR}/CocoaAsyncSocket" "${PODS_CONFIGURATION_BUILD_DIR}/HTTPParserC" "${PODS_CONFIGURATION_BUILD_DIR}/Realm" "${PODS_CONFIGURATION_BUILD_DIR}/RealmSwift" "${PODS_CONFIGURATION_BUILD_DIR}/Telegraph"
 GCC_PREPROCESSOR_DEFINITIONS = $(inherited) COCOAPODS=1
 LD_RUNPATH_SEARCH_PATHS = $(inherited) '@executable_path/../Frameworks' '@loader_path/Frameworks'
-OTHER_CFLAGS = $(inherited) -iquote "${PODS_CONFIGURATION_BUILD_DIR}/Realm/Realm.framework/Headers" -iquote "${PODS_CONFIGURATION_BUILD_DIR}/RealmSwift/RealmSwift.framework/Headers"
-OTHER_LDFLAGS = $(inherited) -ObjC -framework "Realm" -framework "RealmSwift"
+OTHER_CFLAGS = $(inherited) -iquote "${PODS_CONFIGURATION_BUILD_DIR}/CocoaAsyncSocket/CocoaAsyncSocket.framework/Headers" -iquote "${PODS_CONFIGURATION_BUILD_DIR}/HTTPParserC/HTTPParserC.framework/Headers" -iquote "${PODS_CONFIGURATION_BUILD_DIR}/Realm/Realm.framework/Headers" -iquote "${PODS_CONFIGURATION_BUILD_DIR}/RealmSwift/RealmSwift.framework/Headers" -iquote "${PODS_CONFIGURATION_BUILD_DIR}/Telegraph/Telegraph.framework/Headers"
+OTHER_LDFLAGS = $(inherited) -ObjC -framework "CocoaAsyncSocket" -framework "HTTPParserC" -framework "Realm" -framework "RealmSwift" -framework "Telegraph"
 OTHER_SWIFT_FLAGS = $(inherited) "-D" "COCOAPODS"
 PODS_BUILD_DIR = ${BUILD_DIR}
 PODS_CONFIGURATION_BUILD_DIR = ${PODS_BUILD_DIR}/$(CONFIGURATION)$(EFFECTIVE_PLATFORM_NAME)
diff --git a/Pods/Target Support Files/Realm/Info.plist b/Pods/Target Support Files/Realm/Info.plist
index 6146ffa..a83149a 100644
--- a/Pods/Target Support Files/Realm/Info.plist	
+++ b/Pods/Target Support Files/Realm/Info.plist	
@@ -15,7 +15,7 @@
   <key>CFBundlePackageType</key>
   <string>FMWK</string>
   <key>CFBundleShortVersionString</key>
-  <string>3.13.1</string>
+  <string>4.3.0</string>
   <key>CFBundleSignature</key>
   <string>????</string>
   <key>CFBundleVersion</key>
diff --git a/Pods/Target Support Files/RealmSwift/Info.plist b/Pods/Target Support Files/RealmSwift/Info.plist
index 6146ffa..a83149a 100644
--- a/Pods/Target Support Files/RealmSwift/Info.plist	
+++ b/Pods/Target Support Files/RealmSwift/Info.plist	
@@ -15,7 +15,7 @@
   <key>CFBundlePackageType</key>
   <string>FMWK</string>
   <key>CFBundleShortVersionString</key>
-  <string>3.13.1</string>
+  <string>4.3.0</string>
   <key>CFBundleSignature</key>
   <string>????</string>
   <key>CFBundleVersion</key>
diff --git a/Pods/Target Support Files/Telegraph/Info.plist b/Pods/Target Support Files/Telegraph/Info.plist
new file mode 100644
index 0000000..66fb789
--- /dev/null
+++ b/Pods/Target Support Files/Telegraph/Info.plist	
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+  <key>CFBundleDevelopmentRegion</key>
+  <string>en</string>
+  <key>CFBundleExecutable</key>
+  <string>${EXECUTABLE_NAME}</string>
+  <key>CFBundleIdentifier</key>
+  <string>${PRODUCT_BUNDLE_IDENTIFIER}</string>
+  <key>CFBundleInfoDictionaryVersion</key>
+  <string>6.0</string>
+  <key>CFBundleName</key>
+  <string>${PRODUCT_NAME}</string>
+  <key>CFBundlePackageType</key>
+  <string>FMWK</string>
+  <key>CFBundleShortVersionString</key>
+  <string>0.27.0</string>
+  <key>CFBundleSignature</key>
+  <string>????</string>
+  <key>CFBundleVersion</key>
+  <string>${CURRENT_PROJECT_VERSION}</string>
+  <key>NSPrincipalClass</key>
+  <string></string>
+</dict>
+</plist>
diff --git a/Pods/Target Support Files/Telegraph/Telegraph-dummy.m b/Pods/Target Support Files/Telegraph/Telegraph-dummy.m
new file mode 100644
index 0000000..428776a
--- /dev/null
+++ b/Pods/Target Support Files/Telegraph/Telegraph-dummy.m	
@@ -0,0 +1,5 @@
+#import <Foundation/Foundation.h>
+@interface PodsDummy_Telegraph : NSObject
+@end
+@implementation PodsDummy_Telegraph
+@end
diff --git a/Pods/Target Support Files/Telegraph/Telegraph-prefix.pch b/Pods/Target Support Files/Telegraph/Telegraph-prefix.pch
new file mode 100644
index 0000000..082f8af
--- /dev/null
+++ b/Pods/Target Support Files/Telegraph/Telegraph-prefix.pch	
@@ -0,0 +1,12 @@
+#ifdef __OBJC__
+#import <Cocoa/Cocoa.h>
+#else
+#ifndef FOUNDATION_EXPORT
+#if defined(__cplusplus)
+#define FOUNDATION_EXPORT extern "C"
+#else
+#define FOUNDATION_EXPORT extern
+#endif
+#endif
+#endif
+
diff --git a/Pods/Target Support Files/Telegraph/Telegraph-umbrella.h b/Pods/Target Support Files/Telegraph/Telegraph-umbrella.h
new file mode 100644
index 0000000..bce4c6a
--- /dev/null
+++ b/Pods/Target Support Files/Telegraph/Telegraph-umbrella.h	
@@ -0,0 +1,16 @@
+#ifdef __OBJC__
+#import <Cocoa/Cocoa.h>
+#else
+#ifndef FOUNDATION_EXPORT
+#if defined(__cplusplus)
+#define FOUNDATION_EXPORT extern "C"
+#else
+#define FOUNDATION_EXPORT extern
+#endif
+#endif
+#endif
+
+
+FOUNDATION_EXPORT double TelegraphVersionNumber;
+FOUNDATION_EXPORT const unsigned char TelegraphVersionString[];
+
diff --git a/Pods/Target Support Files/Telegraph/Telegraph.modulemap b/Pods/Target Support Files/Telegraph/Telegraph.modulemap
new file mode 100644
index 0000000..b4761a4
--- /dev/null
+++ b/Pods/Target Support Files/Telegraph/Telegraph.modulemap	
@@ -0,0 +1,6 @@
+framework module Telegraph {
+  umbrella header "Telegraph-umbrella.h"
+
+  export *
+  module * { export * }
+}
diff --git a/Pods/Target Support Files/Telegraph/Telegraph.xcconfig b/Pods/Target Support Files/Telegraph/Telegraph.xcconfig
new file mode 100644
index 0000000..655a81e
--- /dev/null
+++ b/Pods/Target Support Files/Telegraph/Telegraph.xcconfig	
@@ -0,0 +1,12 @@
+CODE_SIGN_IDENTITY =
+CONFIGURATION_BUILD_DIR = ${PODS_CONFIGURATION_BUILD_DIR}/Telegraph
+FRAMEWORK_SEARCH_PATHS = $(inherited) "${PODS_CONFIGURATION_BUILD_DIR}/CocoaAsyncSocket" "${PODS_CONFIGURATION_BUILD_DIR}/HTTPParserC"
+GCC_PREPROCESSOR_DEFINITIONS = $(inherited) COCOAPODS=1
+HEADER_SEARCH_PATHS = "${PODS_ROOT}/Headers/Private" "${PODS_ROOT}/Headers/Public"
+OTHER_SWIFT_FLAGS = $(inherited) "-D" "COCOAPODS"
+PODS_BUILD_DIR = ${BUILD_DIR}
+PODS_CONFIGURATION_BUILD_DIR = ${PODS_BUILD_DIR}/$(CONFIGURATION)$(EFFECTIVE_PLATFORM_NAME)
+PODS_ROOT = ${SRCROOT}
+PODS_TARGET_SRCROOT = ${PODS_ROOT}/Telegraph
+PRODUCT_BUNDLE_IDENTIFIER = org.cocoapods.${PRODUCT_NAME:rfc1034identifier}
+SKIP_INSTALL = YES
diff --git a/Pods/Telegraph/LICENSE b/Pods/Telegraph/LICENSE
new file mode 100644
index 0000000..8b0fbb2
--- /dev/null
+++ b/Pods/Telegraph/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2018 Building42, Yvo van Beek, Bernd de Graaf
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/Pods/Telegraph/README.md b/Pods/Telegraph/README.md
new file mode 100644
index 0000000..2317fe5
--- /dev/null
+++ b/Pods/Telegraph/README.md
@@ -0,0 +1,418 @@
+![Telegraph: Secure Web Server for iOS, tvOS and macOS](https://github.com/Building42/Telegraph/raw/master/Resources/logo.png)
+
+[![Build Status](https://travis-ci.org/Building42/Telegraph.svg?branch=master)](https://travis-ci.org/Building42/Telegraph)
+[![CocoaPods compatible](https://img.shields.io/cocoapods/v/Telegraph.svg?style=flat)](https://cocoapods.org/pods/Telegraph)
+[![Carthage compatible](https://img.shields.io/badge/Carthage-compatible-4BC51D.svg?style=flat)](https://github.com/Carthage/Carthage)
+[![License](https://img.shields.io/cocoapods/l/Telegraph.svg?style=flat)](https://cocoapods.org/pods/Telegraph)
+[![Platform](https://img.shields.io/cocoapods/p/Telegraph.svg?style=flat)](https://cocoapods.org/pods/Telegraph)
+
+Telegraph is a Secure Web Server for iOS, tvOS and macOS written in Swift.
+
+- [Features](#features)
+- [Platforms](#platforms)
+- [Versions](#versions)
+- [Installation](#installation)
+- [Build](#build)
+- [Usage](#usage)
+- [TODOs](#todos)
+- [FAQ](#faq)
+- [Authors](#authors)
+- [License](#license)
+
+## Features
+
+- [x] Handles HTTP 1.0/1.1 requests
+- [x] Secure traffic, HTTPS/TLS encryption
+- [x] WebSocket client and server
+- [x] Uses well tested socket library [CocoaAsyncSocket](https://github.com/robbiehanson/CocoaAsyncSocket)
+- [x] Uses performant, low memory, HTTP parser C library [http-parser](https://github.com/nodejs/http-parser)
+- [x] Customizable, from time-outs to message handlers
+- [x] Simple, well commented code
+
+## Platforms
+
+- iOS 8.0+
+- tvOS 9.0+
+- macOS 10.10+
+
+## Versions
+
+- Swift 5.0: [master branch](https://github.com/Building42/Telegraph/tree/master)
+- Swift 4.2: [swift-4.2 branch](https://github.com/Building42/Telegraph/tree/swift-4.2)
+- Swift 4.0: [swift-4 branch](https://github.com/Building42/Telegraph/tree/swift-4)
+- Swift 3.0: [swift-3 branch](https://github.com/Building42/Telegraph/tree/swift-3)
+
+## Installation
+
+### Carthage
+
+Carthage is a decentralized dependency manager that builds your dependencies into binary frameworks.
+
+```ogdl
+github "Building42/Telegraph"
+```
+
+See [Carthage - Quick Start](https://github.com/Carthage/Carthage/#quick-start) for more information.
+
+### CocoaPods
+
+CocoaPods is a dependency manager for Cocoa projects that makes dependencies a part of your workspace.
+
+```ruby
+target '<Your Target Name>'
+use_frameworks!
+
+pod 'Telegraph'
+```
+
+See [CocoaPods - Getting Started](https://guides.cocoapods.org/using/getting-started.html) for more information.
+
+## Build
+
+You can build the Telegraph framework and the examples with these steps:
+
+1. install [Carthage](https://github.com/Carthage/Carthage) using Homebrew
+2. clone the repository
+3. run `carthage bootstrap --use-submodules --no-build`
+4. open Telegraph.xcworkspace, select a scheme and build
+
+This is only necessary if you want to make changes to the framework or try out the examples.
+
+## Usage
+
+### Configure App Transport Security
+
+With iOS 9 Apple introduced APS (App Transport Security) in an effort to improve user security and privacy by requiring apps to use secure network connections over HTTPS. It means that without additional configuration unsecure HTTP requests in apps that target iOS 9 or higher will fail. In iOS 9, APS is unfortunately also activated for LAN connections. Apple fixed this in iOS 10, by adding `NSAllowsLocalNetworking`.
+
+Even though we are using HTTPS, we have to consider the following:
+
+1. when we are communicating between iPads, it is likely that we'll connect on IP addresses, or at least that the hostname of the device won't match the *common name* of the certificate.
+2. our server will use a certificate signed by our own Certificate Authority instead of a well recognized root Certificate Authority.
+
+You can disable APS by adding the key `App Transport Security Settings` to your Info.plist, with a sub-key where `Allow Arbitrary Loads` is set to `Yes`. For more information see [ATS Configuration Basics](https://developer.apple.com/library/content/documentation/General/Reference/InfoPlistKeyReference/Articles/CocoaKeys.html#//apple_ref/doc/uid/TP40009251-SW35).
+
+### Prepare the certificates
+
+For a secure web server you'll need two things:
+
+1. one or more Certificate Authority certificates in DER format.
+2. a PKCS12 bundle containing a private key and certificate (signed by the CA)
+
+Telegraph contains classes to make it easier to load the certificates:
+
+```swift
+let caCertificateURL = Bundle.main.url(forResource: "ca", withExtension: "der")!
+let caCertificate = Certificate(derURL: caCertificateURL)!
+
+let identityURL = Bundle.main.url(forResource: "localhost", withExtension: "p12")!
+let identity = CertificateIdentity(p12URL: identityURL, passphrase: "test")!
+```
+
+> Note: macOS doesn't accept P12 files without passphrase.
+
+### HTTP: Server
+
+You most likely want to create a secure server by passing in the certificates:
+
+```swift
+serverHTTPs = Server(identity: identity, caCertificates: [caCertificate])
+try! server.start(port: 9000)
+```
+
+Or for a quick test, create an unsecure server:
+
+```swift
+serverHTTP = Server()
+try! server.start(port: 9000)
+```
+
+You can limit the server to localhost connections by specifying an interface when you start it:
+
+```swift
+try! server.start(port: 9000, interface: "localhost")
+```
+
+### HTTP: Routes
+
+Routes consist of three parts: HTTP method, path and a handler:
+
+```swift
+server.route(.POST, "test", handleTest)
+server.route(.GET, "hello/:name", handleGreeting)
+server.route(.GET, "secret/*") { .forbidden }
+server.route(.GET, "status") { (.ok, "Server is running") }
+
+server.serveBundle(.main, "/")
+
+// You can also serve custom urls, for example the Demo folder in your bundle
+let demoBundleURL = Bundle.main.url(forResource: "Demo", withExtension: nil)!
+server.serveDirectory(demoBundleURL, "/demo")
+```
+
+Slashes at the start of the path are optional. Routes are case insensitive. You can specify custom regular expressions for more advanced route matching. When none of the routes are matched, the server will return a 404 not found.
+
+The first route in the example above has a route parameter (name). When the server matches the incoming request to that route it will place the parameter in the `params` array of the request:
+
+```swift
+func handleGreeting(request: HTTPRequest) -> HTTPResponse {
+  let name = request.params["name"] ?? "stranger"
+  return HTTPResponse(content: "Hello \(name.capitalized)")
+}
+```
+
+### HTTP: Middleware
+
+When a HTTP request is handled by the Server it is passed through a chain of message handlers. If you don't change the default configuration, requests will first be passed to the `HTTPWebSocketHandler` and then to the `HTTPRouteHandler`.
+
+Below is an example of a message handler:
+
+```swift
+public class HTTPGETOnlyHandler: HTTPRequestHandler {
+  public func respond(to request: HTTPRequest, nextHandler: HTTPRequest.Handler) throws -> HTTPResponse? {
+    // If this is a GET request, pass it to the next handler
+    if request.method == .GET {
+      return try nextHandler(request)
+    }
+
+    // Otherwise return 403 - Forbidden
+    return HTTPResponse(.forbidden, content: "Only GET requests are allowed")
+  }
+}
+```
+
+You can enable the message handler by setting it in the HTTP configuration:
+
+```swift
+server.httpConfig.requestHandlers.insert(HTTPGETOnlyHandler(), at: 0)
+```
+
+Note that the order of the request handlers is important. You'll probably want to have the `HTTPRouteHandler` as the last request handler or your Server won't handle any route requests. The `HTTPRouteHandler` doesn't call any handlers, so don't specify any handlers after the `HTTPRouteHandler`.
+
+You can also modify the request in handlers. This handler copies the QueryString items into the request's `params` dictionary:
+
+```swift
+public class HTTPRequestParamsHandler: HTTPRequestHandler {
+  public func respond(to request: HTTPRequest, nextHandler: HTTPRequest.Handler) throws -> HTTPResponse? {
+    // Extract the query string items and put them in the HTTPRequest params
+    request.uri.queryItems?.forEach { item in
+      request.params[item.name] = item.value
+    }
+
+    // Continue with the rest of the handlers
+    return try nextHandler(request)
+  }
+}
+```
+
+But what if you want to add headers to a response? Simply call the chain and modify the result:
+
+```swift
+public class HTTPAppDetailsHandler: HTTPRequestHandler {
+  public func respond(to request: HTTPRequest, nextHandler: HTTPRequest.Handler) throws -> HTTPResponse? {
+    //  Let the other handlers create a response
+    let response = try nextHandler(request)
+
+    // Add our own bit of magic
+    response.headers["X-App-Version"] = "My App 1.0"
+    return response
+  }
+}
+```
+
+### HTTP: Cross-Origin Resource Sharing (CORS)
+
+The CORS mechanism controls which sites will have permission to access the resources of your server. You can set CORS by sending the `Access-Control-Allow-Origin` header to the client. For development purposes it can be useful to allow all sites with the `*` value.
+
+```swift
+response.headers.accessControlAllowOrigin = "*"
+```
+
+If you want to make it a bit fancier, you can create a handler:
+
+```swift
+public class HTTPCORSHandler: HTTPRequestHandler {
+  public func respond(to request: HTTPRequest, nextHandler: HTTPRequest.Handler) throws -> HTTPResponse? {
+    let response = try nextHandler(request)
+
+    // Add access control header for GET requests
+    if request.method == .GET {
+      response?.headers.accessControlAllowOrigin = "*"
+    }
+
+    return response
+  }
+}
+```
+
+For increased security you can add additional checks, dig down into the request, and send back different CORS headers for different clients.
+
+### HTTP: Client
+
+For client connections we'll use Apple's [URLSession](https://developer.apple.com/reference/foundation/urlsession) class. Ray Wenderlich has an [excellent tutorial](https://www.raywenderlich.com/110458/nsurlsession-tutorial-getting-started) on it.
+We're going to have to manually verify the TLS handshake (App Transport Security needs to be disabled for this):
+
+```swift
+let session = URLSession(configuration: .default, delegate: self, delegateQueue: nil)
+let tlsPolicy = TLSPolicy(commonName: "localhost", certificates: [caCertificate])
+
+extension YourClass: URLSessionDelegate {
+  func urlSession(_ session: URLSession, didReceive challenge: URLAuthenticationChallenge,
+      completionHandler: @escaping (URLSession.AuthChallengeDisposition, URLCredential?) -> Void) {
+    // The TLSPolicy class will do most of the work for us
+    let credential = tlsPolicy.evaluateSession(trust: challenge.protectionSpace.serverTrust)
+    completionHandler(credential == nil ? .cancelAuthenticationChallenge : .useCredential, credential)
+  }
+}
+```
+
+The common name in the `TLSPolicy` should match the common name of the certificate of the server (that was provided in the P12 archive). Although I don't recommend it, you can disable the common name check by providing an empty string (if you provide `nil`, the common name will be compared to the device's hostname).
+
+For the common name you aren't limited to the hostname or IP address of the device. Your backend could, for example, generate a certificate with a common name that matches the UUID of the device. If the client knows the UUID of device it is connecting to, you could make it part of the `TLSPolicy` check.
+
+### WebSockets: Server-side
+
+Your Server will automatically recognize WebSocket requests, thanks to the `HTTPWebSocketHandler` that is by default in the list of HTTP request handlers. Set the WebSocket delegate to handle incoming messages:
+
+```swift
+server.webSocketDelegate = self
+```
+
+Next step is to implement the `ServerWebSocketDelegate` methods:
+
+```swift
+func server(_ server: Server, webSocketDidConnect webSocket: WebSocket, handshake: HTTPRequest) {
+  // A web socket connected, you can extract additional information from the handshake request
+  webSocket.send(text: "Welcome!")
+}
+
+func server(_ server: Server, webSocketDidDisconnect webSocket: WebSocket, error: Error?) {
+  // One of our web sockets disconnected
+}
+
+func server(_ server: Server, webSocket: WebSocket, didReceiveMessage message: WebSocketMessage) {
+  // One of our web sockets sent us a message
+}
+
+func server(_ server: Server, webSocket: WebSocket, didSendMessage message: WebSocketMessage) {
+  // We sent one of our web sockets a message (often you won't need to implement this one)
+}
+```
+
+### WebSockets: Middleware
+
+Web sockets can have custom handlers too, although instead of a whole chain of handlers you specify a single class. The `WebSocketMessageDefaultHandler` will respond to connection-close messages and handle ping messages.
+
+I recommend creating custom handlers by inheriting from the default handler:
+
+```swift
+public class AwesomeWebSocketHandler: WebSocketMessageHandler {
+  public func incoming(message: WebSocketMessage, from webSocket: WebSocket) throws {
+    // Don't forget to call super (for ping-pong etc.)
+    super.incoming(message: message, from: webSocket)
+
+    // Echo incoming text messages
+    switch message.payload {
+    case let .text(text): webSocket.send(text: text)
+    default: break
+    }
+  }
+}
+```
+
+### WebSockets: Client-side
+
+Now that we have a secure WebSocket server, we can use a secure WebSocket client as well by passing the CA certificate. Note that you only have to specify the CA certificate if the certificate isn't a root CA trusted by Apple or if you want to benefit from [certificate pinning](https://security.stackexchange.com/questions/29988/what-is-certificate-pinning).
+
+```swift
+client = try! WebSocketClient("wss://localhost:9000", certificates: [caCertificate])
+client.delegate = self
+
+// You can specify headers too
+client.headers.authorization = "Bearer secret-token"
+```
+
+The delegate methods look like this:
+
+```swift
+func webSocketClient(_ client: WebSocketClient, didConnectToHost host: String) {
+  // The connection starts off as a HTTP request and then is upgraded to a
+  // web socket connection. This method is called if the handshake was succesful.
+}
+
+func webSocketClient(_ client: WebSocketClient, didDisconnectWithError error: Error?) {
+  // We were disconnected from the server
+}
+
+func webSocketClient(_ client: WebSocketClient, didReceiveData data: Data) {
+  // We received a binary message. Ping, pong and the other opcodes are handled for us.
+}
+
+func webSocketClient(_ client: WebSocketClient, didReceiveText text: String) {
+  // We received a text message, let's send one back
+  client.send(text: "Message received")
+}
+```
+
+## FAQ
+
+### Why Telegraph?
+
+There are only a few web servers available for iOS and many of them don't have SSL support. Our main goal with Telegraph is to offer secure HTTP and Web Socket traffic between iPads. The name is a tribute to the electrical telegraph, the first form of electrical telecommunications.
+
+### How do I create the certificates?
+
+Basically what you want is a Certificate Authority and a Device certificate signed by that authority.
+You can find a nice tutorial at: https://jamielinux.com/docs/openssl-certificate-authority/
+
+### My server isn't working properly
+
+Please check the following:
+
+1. is Application Transport Security disabled?
+2. are your certificates valid?
+3. are your routes valid?
+4. have you customized any handlers? Is the route handler still included?
+
+Have a look at the example project in this repository for a working starting point.
+
+### My browser doesn't display images from my bundle
+
+During the build of your project Apple tries to optimize your images to reduce the size of your bundle. This optimization process sometimes causes the images to become unreadable by Chrome. Test your image url in Safari to double check if this is the case.
+
+To solve this you can go to the property inspector in Xcode and change the type of the resource from `Default - PNG image` to `Data`. After that the build process won't optimize your file. I've also done this with `logo.png` in the example projects.
+
+If you want to reduce the size of your images, I highly recommend [ImageOptim](https://imageoptim.com).
+
+### Why can't I use port 80 and 443?
+
+The first 1024 port numbers are restricted to root access only and your app doesn't have root access on the device. If you try to open a Server on those ports you will get a permission denied error when you start the server. For more information, read [why are the first 1024 ports restricted to the root user only](https://unix.stackexchange.com/questions/16564/why-are-the-first-1024-ports-restricted-to-the-root-user-only).
+
+### What if the device goes on standby?
+
+If your app is send to the background or if the device goes on standby you typically have about 3 minutes to handle requests and close connections.  You can create a background task with `UIApplication.beginBackgroundTask` to let iOS know that you need extra time to complete your operations. The property `UIApplication.shared.backgroundTimeRemaining` tells you the time that is left until a possible forced-kill of your app.
+
+### What about HTTP/2 support?
+
+Ever wondered how the remote server knows that your browser is HTTP/2 compatible? During TLS negotiation, the application-layer protocol negotiation (ALPN) extension field contains "h2" to signal that HTTP/2 is going be used. Apple doesn't offer any (public) methods in Secure Transport or CFNetwork to configure ALPN extensions. A secure HTTP/2 iOS implementation is therefor not possible at the moment.
+
+### Can I use this in my Objective-C project?
+
+This library was written in Swift and for performance reasons I haven't decorated classes with `NSObject` unless absolutely necessary (no dynamic dispatch). If you are willing to add Swift code to your project, you can integrate the server by adding a Swift wrapper class that inherits from `NSObject` and has a Telegraph `Server` variable.
+
+## Authors
+
+This library was created by:
+
+- [Yvo van Beek](https://github.com/Zyphrax)
+- [Bernd de Graaf](https://github.com/Vernadsky)
+
+Code and design was inspired by:
+
+- [CocoaHTTPServer](https://github.com/robbiehanson/CocoaHTTPServer) - a Web Server written in Objective-C
+- [Vapor](https://github.com/vapor/vapor) - a Swift Web framework
+
+Thank you to our contributors, your pull requests are most welcome and appreciated!
+
+## License
+
+Telegraph is released under the MIT license. See [LICENSE](https://github.com/Building42/Telegraph/blob/master/LICENSE) for details.
diff --git a/Pods/Telegraph/Sources/Clients/Client+Config.swift b/Pods/Telegraph/Sources/Clients/Client+Config.swift
new file mode 100644
index 0000000..539f491
--- /dev/null
+++ b/Pods/Telegraph/Sources/Clients/Client+Config.swift
@@ -0,0 +1,24 @@
+//
+//  Client+Config.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 2/23/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+import Foundation
+
+public extension HTTPConfig {
+  static var clientDefault: HTTPConfig {
+    return HTTPConfig(requestHandlers: [])
+  }
+}
+
+public extension WebSocketConfig {
+  static var clientDefault: WebSocketConfig {
+    var config = WebSocketConfig()
+    config.maskMessages = true
+    config.pingInterval = 0
+    return config
+  }
+}
diff --git a/Pods/Telegraph/Sources/Clients/WebSocketClient.swift b/Pods/Telegraph/Sources/Clients/WebSocketClient.swift
new file mode 100644
index 0000000..114cb4d
--- /dev/null
+++ b/Pods/Telegraph/Sources/Clients/WebSocketClient.swift
@@ -0,0 +1,282 @@
+//
+//  WebSocketClient.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 2/9/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+import Foundation
+
+public protocol WebSocketClientDelegate: class {
+  func webSocketClient(_ client: WebSocketClient, didConnectToHost host: String)
+  func webSocketClient(_ client: WebSocketClient, didDisconnectWithError error: Error?)
+
+  func webSocketClient(_ client: WebSocketClient, didReceiveData data: Data)
+  func webSocketClient(_ client: WebSocketClient, didReceiveText text: String)
+}
+
+open class WebSocketClient: WebSocket {
+  public let url: URL
+  public var headers: HTTPHeaders
+
+  public var config = WebSocketConfig.clientDefault
+  public var tlsPolicy: TLSPolicy?
+  public weak var delegate: WebSocketClientDelegate?
+
+  private let workQueue = DispatchQueue(label: "Telegraph.WebSocketClient.work")
+  private let delegateQueue = DispatchQueue(label: "Telegraph.WebSocketClient.delegate")
+
+  private let endpoint: Endpoint
+  private var socket: TCPSocket?
+  private var httpConnection: HTTPConnection?
+  private var webSocketConnection: WebSocketConnection?
+
+  /// Initializes a new WebSocketClient with an url
+  public init(url: URL, headers: HTTPHeaders = .empty) throws {
+    guard url.hasWebSocketScheme else { throw WebSocketClientError.invalidScheme }
+    guard let endpoint = Endpoint(url: url) else { throw WebSocketClientError.invalidHost }
+
+    // Store the connection information
+    self.url = url
+    self.endpoint = endpoint
+    self.headers = headers
+
+    // Only mask unsecure connections
+    config.maskMessages = !url.isSchemeSecure
+  }
+
+  /// Performs the handshake with the host, forming the websocket connection.
+  public func connect(timeout: TimeInterval = 10) {
+    workQueue.async { [weak self] in
+      guard let self = self else { return }
+
+      // Release the old connections
+      self.httpConnection = nil
+      self.webSocketConnection = nil
+
+      // Create and connect the socket
+      self.socket = TCPSocket(endpoint: self.endpoint, tlsPolicy: self.tlsPolicy)
+      self.socket!.setDelegate(self, queue: self.workQueue)
+      self.socket!.connect(timeout: timeout)
+    }
+  }
+
+  /// Disconnects the client. Same as calling close with immediately: false.
+  public func disconnect() {
+    close(immediately: false)
+  }
+
+  /// Disconnects the client.
+  public func close(immediately: Bool) {
+    workQueue.async { [weak self] in
+      self?.socket?.close(when: .immediately)
+      self?.httpConnection?.close(immediately: true)
+      self?.webSocketConnection?.close(immediately: immediately)
+    }
+  }
+
+  /// Sends a raw websocket message.
+  public func send(message: WebSocketMessage) {
+    workQueue.async { [weak self] in
+      self?.webSocketConnection?.send(message: message)
+    }
+  }
+
+  /// Performs a handshake to initiate the websocket connection.
+  private func performHandshake(socket: TCPSocket) {
+    // Create the handshake request
+    let requestURI = URI(path: url.path, query: url.query)
+    let handshakeRequest = HTTPRequest(uri: requestURI, headers: headers)
+    handshakeRequest.webSocketHandshake(host: endpoint.host, port: endpoint.port)
+
+    // Create the HTTP connection (retains the socket)
+    self.httpConnection = HTTPConnection(socket: socket, config: HTTPConfig.clientDefault)
+    self.httpConnection!.delegate = self
+    self.httpConnection!.open()
+
+    // Send the handshake request
+    self.httpConnection!.send(request: handshakeRequest)
+  }
+
+  /// Processes the handshake response.
+  private func handleHandshakeResponse(_ response: HTTPResponse) {
+    // Validate the handshake response
+    guard response.isWebSocketHandshake else {
+      let handShakeError = WebSocketClientError.handshakeFailed(response: response)
+      handleHandshakeError(handShakeError)
+      return
+    }
+
+    // Extract the information from the HTTP connection
+    guard let (socket, webSocketData) = httpConnection?.upgrade() else { return }
+
+    // Release the HTTP connection
+    httpConnection = nil
+
+    // Create a WebSocket connection (retains the socket)
+    webSocketConnection = WebSocketConnection(socket: socket, config: config)
+    webSocketConnection!.delegate = self
+    webSocketConnection!.open(data: webSocketData)
+
+    // Inform the delegate that we are connected
+    delegateQueue.async { [weak self] in
+      guard let self = self else { return }
+      self.delegate?.webSocketClient(self, didConnectToHost: self.endpoint.host)
+    }
+  }
+
+  /// Handles a bad response on the websocket handshake.
+  private func handleHandshakeError(_ error: Error?) {
+    // Prevent any connection delegate calls, we want to provide our own error
+    httpConnection?.delegate = nil
+    webSocketConnection?.delegate = nil
+
+    // Manually close and report the error
+    close(immediately: true)
+    handleConnectionClose(error: error)
+  }
+
+  /// Handles a connection close.
+  private func handleConnectionClose(error: Error?) {
+    httpConnection = nil
+    webSocketConnection = nil
+
+    delegateQueue.async { [weak self] in
+      guard let self = self else { return }
+      self.delegate?.webSocketClient(self, didDisconnectWithError: error)
+    }
+  }
+}
+
+// MARK: WebSocket conformance
+
+public extension WebSocketClient {
+  /// The local endpoint information, only available when connected.
+  var localEndpoint: Endpoint? {
+    return socket?.localEndpoint
+  }
+
+  /// The remote endpoint information, only available when connected.
+  var remoteEndpoint: Endpoint? {
+    return socket?.remoteEndpoint
+  }
+}
+
+// MARK: Convenience initializers
+
+public extension WebSocketClient {
+  /// Creates a new WebSocketClient with an url in string form.
+  convenience init(_ string: String) throws {
+    guard let url = URL(string: string) else { throw WebSocketClientError.invalidURL }
+    try self.init(url: url)
+  }
+
+  /// Creates a new WebSocketClient with an url in string form and certificates to trust.
+  convenience init(_ string: String, certificates: [Certificate]) throws {
+    try self.init(string)
+    self.tlsPolicy = TLSPolicy(certificates: certificates)
+  }
+
+  /// Creates a new WebSocketClient with an url and certificates to trust.
+  convenience init(url: URL, certificates: [Certificate]) throws {
+    try self.init(url: url)
+    self.tlsPolicy = TLSPolicy(certificates: certificates)
+  }
+}
+
+// MARK: TCPSocketDelegate implementation
+
+extension WebSocketClient: TCPSocketDelegate {
+  /// Raised when the socket has connected.
+  public func socketDidOpen(_ socket: TCPSocket) {
+    guard socket == self.socket else { return }
+
+    // Stop retaining the socket
+    self.socket = nil
+
+    // Start TLS for secure hosts
+    if url.isSchemeSecure {
+      socket.startTLS()
+    }
+
+    // Send the handshake request
+    performHandshake(socket: socket)
+  }
+
+  /// Raised when the socket disconnected.
+  public func socketDidClose(_ socket: TCPSocket, error: Error?) {
+    guard socket == self.socket else { return }
+    handleConnectionClose(error: error)
+  }
+
+  /// Raised when the socket reads (ignore, the connections will handle this).
+  public func socketDidRead(_ socket: TCPSocket, data: Data, tag: Int) {}
+
+  /// Raised when the socket writes (ignore).
+  public func socketDidWrite(_ socket: TCPSocket, tag: Int) {}
+}
+
+// MARK: TCPSocketDelegate implementation
+
+extension WebSocketClient: HTTPConnectionDelegate {
+  /// Raised when the HTTPConnecion was closed.
+  public func connection(_ httpConnection: HTTPConnection, didCloseWithError error: Error?) {
+    guard httpConnection == self.httpConnection else { return }
+    handleConnectionClose(error: error)
+  }
+
+  /// Raised when the HTTPConnecion received a response.
+  public func connection(_ httpConnection: HTTPConnection, handleIncomingResponse response: HTTPResponse, error: Error?) {
+    guard httpConnection == self.httpConnection else { return }
+
+    if let error = error {
+      handleHandshakeError(error)
+    } else {
+      handleHandshakeResponse(response)
+    }
+  }
+
+  /// Raised when the HTTPConnecion received a request (client doesn't support requests -> close).
+  public func connection(_ httpConnection: HTTPConnection, handleIncomingRequest request: HTTPRequest, error: Error?) {
+    guard httpConnection == self.httpConnection else { return }
+    httpConnection.close(immediately: true)
+  }
+
+  /// Raised when the HTTPConnecion received a request (client doesn't support request upgrades -> close).
+  public func connection(_ httpConnection: HTTPConnection, handleUpgradeByRequest request: HTTPRequest) {
+    guard httpConnection == self.httpConnection else { return }
+    httpConnection.close(immediately: true)
+  }
+}
+
+// MARK: WebSocketConnectionDelegate implementation
+
+extension WebSocketClient: WebSocketConnectionDelegate {
+  /// Raised when the WebSocketConnection disconnected.
+  public func connection(_ webSocketConnection: WebSocketConnection, didCloseWithError error: Error?) {
+    guard webSocketConnection == self.webSocketConnection else { return }
+    handleConnectionClose(error: error)
+  }
+
+  /// Raised when the WebSocketConnection receives a message.
+  public func connection(_ webSocketConnection: WebSocketConnection, didReceiveMessage message: WebSocketMessage) {
+    guard webSocketConnection == self.webSocketConnection else { return }
+
+    // We are only interested in binary and text messages
+    guard message.opcode == .binaryFrame || message.opcode == .textFrame else { return }
+
+    // Inform the delegate
+    delegateQueue.async { [weak self] in
+      guard let self = self else { return }
+      switch message.payload {
+      case let .binary(data): self.delegate?.webSocketClient(self, didReceiveData: data)
+      case let .text(text): self.delegate?.webSocketClient(self, didReceiveText: text)
+      default: break
+      }
+    }
+  }
+
+  /// Raised when the WebSocketConnection sent a message (ignore).
+  public func connection(_ webSocketConnection: WebSocketConnection, didSendMessage message: WebSocketMessage) {}
+}
diff --git a/Pods/Telegraph/Sources/Clients/WebSocketClientError.swift b/Pods/Telegraph/Sources/Clients/WebSocketClientError.swift
new file mode 100644
index 0000000..0825593
--- /dev/null
+++ b/Pods/Telegraph/Sources/Clients/WebSocketClientError.swift
@@ -0,0 +1,33 @@
+//
+//  WebSocketClientError.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 10/11/18.
+//  Copyright © 2018 Building42. All rights reserved.
+//
+
+import Foundation
+
+enum WebSocketClientError: Error {
+  case invalidURL
+  case invalidScheme
+  case invalidHost
+  case handshakeFailed(response: HTTPResponse)
+}
+
+extension WebSocketClientError: CustomStringConvertible {
+  public var description: String {
+    switch self {
+    case .invalidURL: return "The provided URL is not a valid"
+    case .invalidScheme: return "The provided URL does not have a WebSocket scheme (http, https, ws or wss)"
+    case .invalidHost: return "The provided URL should have a host"
+    case let .handshakeFailed(response): return "The handshake request failed with status \(response.status)"
+    }
+  }
+}
+
+extension WebSocketClientError: LocalizedError {
+  public var errorDescription: String? {
+    return description
+  }
+}
diff --git a/Pods/Telegraph/Sources/Helpers/Deprecations.swift b/Pods/Telegraph/Sources/Helpers/Deprecations.swift
new file mode 100644
index 0000000..8adcd7d
--- /dev/null
+++ b/Pods/Telegraph/Sources/Helpers/Deprecations.swift
@@ -0,0 +1,149 @@
+//
+//  Deprecations.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 11/9/18.
+//  Copyright © 2018 Building42. All rights reserved.
+//
+
+import Foundation
+
+// MARK: - DateFormatter
+
+public extension DateFormatter {
+  @available(*, deprecated, renamed: "rfc1123")
+  var rfc7231: DateFormatter {
+    return .rfc1123
+  }
+}
+
+// MARK: - DispatchTimer
+
+public extension DispatchTimer {
+  /// Creates and starts a timer that runs after a while, optionally repeating with a specific interval.
+  @available(*, deprecated, message: "no longer supported, use start(at:) to run the timer at a later time")
+  static func run(after: TimeInterval, interval: TimeInterval = 0, queue: DispatchQueue, execute block: @escaping () -> Void) -> DispatchTimer {
+    let timer = DispatchTimer(interval: interval, queue: queue, execute: block)
+    timer.start(at: Date() + after)
+    return timer
+  }
+
+  /// (Re)starts the timer, next run will be after the specified interval.
+  @available(*, deprecated, message: "no longer supported, use start(at:) to run the timer at a later time")
+  func start(after: TimeInterval) {
+    start(at: Date() + after)
+  }
+}
+
+// MARK: - HTTPHeader
+
+@available(*, deprecated, renamed: "HTTPHeaderName")
+typealias HTTPHeader = HTTPHeaderName
+
+@available(*, deprecated, message: "use Dictionary")
+typealias CustomKeyIndexable = Dictionary
+
+// MARK: - HTTPHeaderName
+
+public extension HTTPHeaderName {
+  @available(*, deprecated, message: "construct lower cased names manually")
+  static var forceLowerCased = false
+}
+
+// MARK: - HTTPMethod
+
+public extension HTTPMethod {
+  @available(*, deprecated, renamed: "GET")
+  static var get = HTTPMethod.GET
+
+  @available(*, deprecated, renamed: "HEAD")
+  static var head = HTTPMethod.HEAD
+
+  @available(*, deprecated, renamed: "DELETE")
+  static var delete = HTTPMethod.DELETE
+
+  @available(*, deprecated, renamed: "OPTIONS")
+  static var options = HTTPMethod.OPTIONS
+
+  @available(*, deprecated, renamed: "POST")
+  static var post = HTTPMethod.POST
+
+  @available(*, deprecated, renamed: "PUT")
+  static var put = HTTPMethod.PUT
+
+  @available(*, deprecated, renamed: "init(name:)")
+  init(rawValue: String) {
+    self.init(name: rawValue.uppercased())
+  }
+
+  @available(*, deprecated, renamed: "init(name:)")
+  static func method(_ name: String) -> HTTPMethod {
+    return HTTPMethod(name: name)
+  }
+}
+
+// MARK: - HTTPRouteError
+
+@available(*, deprecated, message: "these specific errors are no longer thrown")
+public enum HTTPRouteError: Error {
+  case invalidURI
+}
+
+// MARK: - HTTPStatus
+
+public extension HTTPStatus {
+  @available(*, deprecated, message: "return nil from your handler (this status is used by Nginx, not part of the spec)")
+  static let noResponse = HTTPStatus(code: 444, phrase: "No Response")
+}
+
+// MARK: - HTTPStatusCode
+
+@available(*, deprecated, message: "use HTTPStatus, for example .ok or .notFound")
+public typealias HTTPStatusCode = HTTPStatus
+
+// MARK: - HTTPReponse
+
+public extension HTTPResponse {
+  @available(*, deprecated, message: "use DateFormatter.rfc1123 or Date's rfc1123 variable")
+  static let dateFormatter = DateFormatter.rfc1123
+
+  @available(*, deprecated, renamed: "init(status:data:)")
+  convenience init(_ status: HTTPStatus = .ok, data: Data) {
+    self.init(status, body: data)
+  }
+
+  @available(*, deprecated, message: "use keepAlive instead, this setter only handles true properly")
+  var closeAfterWrite: Bool {
+    get { return !keepAlive }
+    set { if newValue { headers.connection = "close" } }
+  }
+}
+
+// MARK: - HTTPVersion
+
+public extension HTTPVersion {
+  @available(*, deprecated, renamed: "init(major:minor:)")
+  init(_ major: UInt, _ minor: UInt) {
+    self.init(major: major, minor: minor)
+  }
+}
+
+// MARK: - Server
+
+public extension Server {
+  @available(*, deprecated, renamed: "start(port:)")
+  func start(onPort port: UInt16) throws {
+    try start(port: Int(port))
+  }
+
+  @available(*, deprecated, renamed: "start(port:interface:)")
+  func start(onInterface interface: String?, port: UInt16 = 0) throws {
+    try start(port: Int(port), interface: interface)
+  }
+
+  @available(swift, obsoleted: 5, renamed: "responseFor(request:)")
+  func handleIncoming(request: HTTPRequest) throws -> HTTPResponse? { return nil }
+
+  @available(swift, obsoleted: 5, renamed: "responseFor(error:)")
+  func handleIncoming(error: Error) throws -> HTTPResponse? { return nil }
+}
diff --git a/Pods/Telegraph/Sources/Helpers/DispatchTimer.swift b/Pods/Telegraph/Sources/Helpers/DispatchTimer.swift
new file mode 100644
index 0000000..0b8691e
--- /dev/null
+++ b/Pods/Telegraph/Sources/Helpers/DispatchTimer.swift
@@ -0,0 +1,84 @@
+//
+//  DispatchTimer.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 2/23/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+import Foundation
+
+public final class DispatchTimer {
+  private let interval: TimeInterval
+  private let queue: DispatchQueue
+  private let block: () -> Void
+  private var timer: DispatchSourceTimer?
+
+  /// Creates a dispatch timer.
+  init(interval: TimeInterval = 0, queue: DispatchQueue, execute block: @escaping () -> Void) {
+    self.interval = interval
+    self.queue = queue
+    self.block = block
+  }
+
+  /// (Re)starts the timer, next run at a specific date.
+  func start(at startDate: Date) {
+    stop()
+
+    // Create a new timer
+    timer = DispatchSource.makeTimerSource(queue: queue)
+    timer?.setEventHandler(handler: block)
+
+    // Schedule the timer to start at a specific time or after the interval
+    let deadline = DispatchWallTime(date: startDate)
+
+    if interval > 0 {
+      timer?.schedule(wallDeadline: deadline, repeating: interval)
+    } else {
+      timer?.schedule(wallDeadline: deadline)
+    }
+
+    // Activate the timer
+    timer?.resume()
+  }
+
+  /// (Re)starts the timer, next run will be immediately or after the interval.
+  func start() {
+    start(at: Date().addingTimeInterval(interval))
+  }
+
+  /// Stops the timer.
+  func stop() {
+    timer?.cancel()
+    timer = nil
+  }
+}
+
+// MARK: DispatchTimer convenience methods
+
+public extension DispatchTimer {
+  /// Creates and starts a timer that runs multiple times with a specific interval.
+  static func run(interval: TimeInterval, queue: DispatchQueue, execute block: @escaping () -> Void) -> DispatchTimer {
+    let timer = DispatchTimer(interval: interval, queue: queue, execute: block)
+    timer.start()
+    return timer
+  }
+
+  /// Creates and starts a timer that runs at a specfic data, optionally repeating with a specific interval.
+  static func run(at: Date, interval: TimeInterval = 0, queue: DispatchQueue, execute block: @escaping () -> Void) -> DispatchTimer {
+    let timer = DispatchTimer(interval: interval, queue: queue, execute: block)
+    timer.start(at: at)
+    return timer
+  }
+}
+
+// MARK: DispatchWallTime convenience initializers
+
+private extension DispatchWallTime {
+  /// Creates a dispatch wall time from a date.
+  init(date: Date) {
+    let (seconds, frac) = modf(date.timeIntervalSince1970)
+    let wallTime = timespec(tv_sec: Int(seconds), tv_nsec: Int(frac * Double(NSEC_PER_SEC)))
+    self.init(timespec: wallTime)
+  }
+}
diff --git a/Pods/Telegraph/Sources/Helpers/Extensions/Array+Ext.swift b/Pods/Telegraph/Sources/Helpers/Extensions/Array+Ext.swift
new file mode 100644
index 0000000..e2dd4fe
--- /dev/null
+++ b/Pods/Telegraph/Sources/Helpers/Extensions/Array+Ext.swift
@@ -0,0 +1,21 @@
+//
+//  Array+Ext.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 2/19/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+import Foundation
+
+public extension Array {
+  /// Returns the first item in an array that conforms to the provided type.
+  func first<T>(ofType: T.Type) -> T? {
+    return first { $0 as? T != nil } as? T
+  }
+
+  /// Returns only the items that match the provided type.
+  func filter<T>(ofType: T.Type) -> [T] {
+    return compactMap { $0 as? T }
+  }
+}
diff --git a/Pods/Telegraph/Sources/Helpers/Extensions/Data+Ext.swift b/Pods/Telegraph/Sources/Helpers/Extensions/Data+Ext.swift
new file mode 100644
index 0000000..861e1c8
--- /dev/null
+++ b/Pods/Telegraph/Sources/Helpers/Extensions/Data+Ext.swift
@@ -0,0 +1,43 @@
+//
+//  Data+Ext.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 2/13/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+import Foundation
+
+public extension Data {
+  /// The bytes for carriage return, line feed.
+  static let crlf = Data([0xD, 0xA])
+
+  /// Creates data with a random set of bytes.
+  init(randomNumberOfBytes count: Int) {
+    self.init(count: count)
+    withUnsafeMutableBytes { _ = SecRandomCopyBytes(kSecRandomDefault, count, $0.baseAddress!) }
+  }
+
+  /// An hexadecimal string representation of the bytes.
+  func hexEncodedString() -> String {
+    let hexDigits = Array("0123456789abcdef".utf16)
+    var hexChars = [UTF16.CodeUnit]()
+    hexChars.reserveCapacity(count * 2)
+
+    for byte in self {
+      let (index1, index2) = Int(byte).quotientAndRemainder(dividingBy: 16)
+      hexChars.append(hexDigits[index1])
+      hexChars.append(hexDigits[index2])
+    }
+
+    return String(utf16CodeUnits: hexChars, count: hexChars.count)
+  }
+
+  /// Masks the contents of the data with the provided mask bytes.
+  mutating func mask(with maskBytes: [UInt8]) {
+    let maskSize = maskBytes.count
+    for index in 0..<count {
+      self[index] ^= maskBytes[index % maskSize]
+    }
+  }
+}
diff --git a/Pods/Telegraph/Sources/Helpers/Extensions/FileManager+Ext.swift b/Pods/Telegraph/Sources/Helpers/Extensions/FileManager+Ext.swift
new file mode 100644
index 0000000..a97a59a
--- /dev/null
+++ b/Pods/Telegraph/Sources/Helpers/Extensions/FileManager+Ext.swift
@@ -0,0 +1,25 @@
+//
+//  FileManager+Ext.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 5/16/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+import Foundation
+
+#if os(iOS) || os(watchOS) || os(tvOS)
+  import MobileCoreServices
+#endif
+
+public extension FileManager {
+  /// Returns the mime type of a file.
+  func mimeType(of url: URL) -> String {
+    let fallback = "application/octet-stream"
+    let fileExt = url.pathExtension as CFString
+
+    guard let uti = UTTypeCreatePreferredIdentifierForTag(kUTTagClassFilenameExtension, fileExt, nil)?.takeRetainedValue() else { return fallback }
+    guard let mimeType = UTTypeCopyPreferredTagWithClass(uti, kUTTagClassMIMEType)?.takeRetainedValue() else { return fallback }
+    return mimeType as String
+  }
+}
diff --git a/Pods/Telegraph/Sources/Helpers/Extensions/NSRegularExpression+Ext.swift b/Pods/Telegraph/Sources/Helpers/Extensions/NSRegularExpression+Ext.swift
new file mode 100644
index 0000000..3aed46c
--- /dev/null
+++ b/Pods/Telegraph/Sources/Helpers/Extensions/NSRegularExpression+Ext.swift
@@ -0,0 +1,64 @@
+//
+//  NSRegularExpression+Ext.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 2/5/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+import Foundation
+
+public typealias Regex = NSRegularExpression
+
+// MARK: Regex default arguments
+
+extension NSRegularExpression {
+  func firstMatch(in value: String, options: Regex.MatchingOptions = []) -> NSTextCheckingResult? {
+    return firstMatch(in: value, options: options, range: value.fullRange)
+  }
+
+  func matches(value: String) -> Bool {
+    return firstMatch(in: value) != nil
+  }
+
+  func matches(in value: String, options: Regex.MatchingOptions = []) -> [NSTextCheckingResult] {
+    return matches(in: value, options: options, range: value.fullRange)
+  }
+
+  func stringByReplacingMatches(in value: String, withPattern pattern: String, options: Regex.MatchingOptions = []) -> String {
+    return stringByReplacingMatches(in: value, options: options, range: value.fullRange, withTemplate: pattern)
+  }
+}
+
+// MARK: Regex simple matching
+
+struct RegexMatch {
+  let value: String
+  let groupValues: [String]
+
+  init(input: String, result: NSTextCheckingResult) {
+    value = input.substring(with: result.range) ?? ""
+    groupValues = (1..<result.numberOfRanges).compactMap { input.substring(with: result.range(at: $0)) }
+  }
+}
+
+extension NSRegularExpression {
+  func matchAll(in value: String, options: Regex.MatchingOptions = []) -> [RegexMatch] {
+    return matches(in: value, options: options).map { RegexMatch(input: value, result: $0) }
+  }
+}
+
+// MARK: String helpers
+
+private extension String {
+  var fullRange: NSRange {
+    return NSRange(location: 0, length: count)
+  }
+
+  func substring(with range: NSRange) -> String? {
+    guard let range = Range(range) else { return nil }
+    let from = index(startIndex, offsetBy: range.lowerBound)
+    let to = index(startIndex, offsetBy: range.upperBound)
+    return String(self[from..<to])
+  }
+}
diff --git a/Pods/Telegraph/Sources/Helpers/Extensions/String+Ext.swift b/Pods/Telegraph/Sources/Helpers/Extensions/String+Ext.swift
new file mode 100644
index 0000000..2dc97ce
--- /dev/null
+++ b/Pods/Telegraph/Sources/Helpers/Extensions/String+Ext.swift
@@ -0,0 +1,27 @@
+//
+//  String+Ext.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 2/10/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+import Foundation
+
+public extension String {
+  /// Generates a base64 encoded string of this String's contents.
+  var base64: String {
+    return utf8Data.base64EncodedString()
+  }
+
+  /// The character bytes in UTF8 encoding.
+  var utf8Data: Data {
+    return data(using: .utf8)!
+  }
+
+  /// Truncates a string and optionally adds ellipses.
+  func truncate(count: Int, ellipses: Bool = true) -> String {
+    if self.count <= count { return self }
+    return prefix(count) + (ellipses ? "..." : "")
+  }
+}
diff --git a/Pods/Telegraph/Sources/Helpers/Extensions/UInt+Ext.swift b/Pods/Telegraph/Sources/Helpers/Extensions/UInt+Ext.swift
new file mode 100644
index 0000000..6fd8547
--- /dev/null
+++ b/Pods/Telegraph/Sources/Helpers/Extensions/UInt+Ext.swift
@@ -0,0 +1,56 @@
+//
+//  UInt+Ext.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 2/17/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+import Foundation
+
+public extension UInt8 {
+  /// Generates a random UInt8 byte.
+  static var random: UInt8 {
+    var number: UInt8 = 0
+    _ = SecRandomCopyBytes(kSecRandomDefault, 1, &number)
+    return number
+  }
+}
+
+public extension UInt16 {
+  /// The two UInt8 bytes that make up the UInt16.
+  var bytes: [UInt8] {
+    return [
+      UInt8(truncatingIfNeeded: self >> 8),
+      UInt8(truncatingIfNeeded: self)
+    ]
+  }
+}
+
+public extension UInt32 {
+  /// The four UInt8 bytes that make up the UInt32.
+  var bytes: [UInt8] {
+    return [
+      UInt8(truncatingIfNeeded: self >> 24),
+      UInt8(truncatingIfNeeded: self >> 16),
+      UInt8(truncatingIfNeeded: self >> 8),
+      UInt8(truncatingIfNeeded: self)
+    ]
+  }
+}
+
+public extension UInt64 {
+  /// The eight UInt8 bytes that make up the UInt64.
+  var bytes: [UInt8] {
+    return [
+      UInt8(truncatingIfNeeded: self >> 56),
+      UInt8(truncatingIfNeeded: self >> 48),
+      UInt8(truncatingIfNeeded: self >> 40),
+      UInt8(truncatingIfNeeded: self >> 32),
+      UInt8(truncatingIfNeeded: self >> 24),
+      UInt8(truncatingIfNeeded: self >> 16),
+      UInt8(truncatingIfNeeded: self >> 8),
+      UInt8(truncatingIfNeeded: self)
+    ]
+  }
+}
diff --git a/Pods/Telegraph/Sources/Helpers/Extensions/URL+Ext.swift b/Pods/Telegraph/Sources/Helpers/Extensions/URL+Ext.swift
new file mode 100644
index 0000000..d6124e3
--- /dev/null
+++ b/Pods/Telegraph/Sources/Helpers/Extensions/URL+Ext.swift
@@ -0,0 +1,26 @@
+//
+//  URL+Ext.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 2/10/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+import Foundation
+
+public extension URL {
+  /// Indicates if the URL has a https, http, wss or ws scheme.
+  var hasWebSocketScheme: Bool {
+    return scheme == "https" || scheme == "http" || scheme == "wss" || scheme == "ws"
+  }
+
+  /// A simple port determination based on the scheme, 443 for HTTPS and 80 for HTTP.
+  var portBasedOnScheme: Int {
+    return isSchemeSecure ? 443 : 80
+  }
+
+  /// Indicates if the scheme is HTTPS or WSS.
+  var isSchemeSecure: Bool {
+    return scheme == "https" || scheme == "wss"
+  }
+}
diff --git a/Pods/Telegraph/Sources/Helpers/RFC1123.swift b/Pods/Telegraph/Sources/Helpers/RFC1123.swift
new file mode 100644
index 0000000..edb80d5
--- /dev/null
+++ b/Pods/Telegraph/Sources/Helpers/RFC1123.swift
@@ -0,0 +1,32 @@
+//
+//  RFC1123.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 8/3/18.
+//  Copyright © 2018 Building42. All rights reserved.
+//
+
+import Foundation
+
+public struct RFC1123 {
+  /// A shared RFC1123 DateFormatter (thread-safe since iOS 7 and macOS 10.9).
+  public static var formatter = DateFormatter.rfc1123
+}
+
+public extension DateFormatter {
+  /// Creates a new RFC1123 DateFormatter.
+  static var rfc1123: DateFormatter {
+    let formatter = DateFormatter()
+    formatter.dateFormat = "EEE, dd MMM yyyy HH:mm:ss z"
+    formatter.locale = Locale(identifier: "en_US_POSIX")
+    formatter.timeZone = TimeZone(secondsFromGMT: 0)
+    return formatter
+  }
+}
+
+public extension Date {
+  /// Returns the date formatted as RFC1123.
+  var rfc1123: String {
+    return RFC1123.formatter.string(from: self)
+  }
+}
diff --git a/Pods/Telegraph/Sources/Helpers/SynchronizedSet.swift b/Pods/Telegraph/Sources/Helpers/SynchronizedSet.swift
new file mode 100644
index 0000000..5aa72c8
--- /dev/null
+++ b/Pods/Telegraph/Sources/Helpers/SynchronizedSet.swift
@@ -0,0 +1,64 @@
+//
+//  SynchronizedArray.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 7/13/18.
+//  Copyright © 2018 Building42. All rights reserved.
+//
+
+public class SynchronizedSet<Element: Hashable> {
+  private var innerSet = Set<Element>()
+  private let queue = DispatchQueue(label: "Telegraph.SynchronizedSet", attributes: .concurrent)
+}
+
+public extension SynchronizedSet {
+  /// The number of elements in the set.
+  var count: Int {
+    return queue.sync { innerSet.count }
+  }
+
+  /// A boolean indicating if the set is empty.
+  var isEmpty: Bool {
+    return queue.sync { innerSet.isEmpty }
+  }
+
+  /// A textual representation of the set and its elements.
+  var description: String {
+    return queue.sync { innerSet.description }
+  }
+}
+
+public extension SynchronizedSet {
+  /// Inserts a new element into the set.
+  func insert(_ element: Element) {
+    queue.async(flags: .barrier) { [weak self] in
+      self?.innerSet.insert(element)
+    }
+  }
+
+  /// Removes an element from the set.
+  func remove(_ element: Element) {
+    queue.async(flags: .barrier) { [weak self] in
+      self?.innerSet.remove(element)
+    }
+  }
+}
+
+public extension SynchronizedSet {
+  /// Returns a boolean indicating if the set contains the given element.
+  func contains(_ element: Element) -> Bool {
+    return queue.sync { innerSet.contains(element) }
+  }
+
+  /// Calls the given closure on each element in the set.
+  func forEach(_ body: (Element) -> Void) {
+    queue.sync { innerSet.forEach(body) }
+  }
+}
+
+public extension SynchronizedSet {
+  /// Returns an array copy of the set.
+  func toArray() -> [Element] {
+    return queue.sync { Array(innerSet) }
+  }
+}
diff --git a/Pods/Telegraph/Sources/Protocols/HTTP/Handlers/HTTPErrorDefaultHandler.swift b/Pods/Telegraph/Sources/Protocols/HTTP/Handlers/HTTPErrorDefaultHandler.swift
new file mode 100644
index 0000000..6eb906f
--- /dev/null
+++ b/Pods/Telegraph/Sources/Protocols/HTTP/Handlers/HTTPErrorDefaultHandler.swift
@@ -0,0 +1,37 @@
+//
+//  HTTPErrorDefaultHandler.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 3/30/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+import Foundation
+
+public class HTTPErrorDefaultHandler: HTTPErrorHandler {
+  public func respond(to error: Error) -> HTTPResponse? {
+    switch error {
+    // Stream errors, we should disconnect
+    case HTTPError.unexpectedStreamEnd, HTTPError.connectionShouldBeClosed:
+      return nil
+
+    // Protocol errors
+    case HTTPError.protocolNotSupported:
+      return HTTPResponse(.notImplemented, error: error)
+
+    // Request errors
+    case HTTPError.invalidMethod:
+      return HTTPResponse(.methodNotAllowed, error: error)
+    case HTTPError.invalidVersion:
+      return HTTPResponse(.httpVersionNotSupported, error: error)
+    case HTTPError.headerOverflow:
+      return HTTPResponse(.requestHeaderFieldsTooLarge, error: error)
+    case is HTTPError:
+      return HTTPResponse(.badRequest, error: error)
+
+    // Other unknown errors
+    default:
+      return HTTPResponse(error: error)
+    }
+  }
+}
diff --git a/Pods/Telegraph/Sources/Protocols/HTTP/Handlers/HTTPErrorHandler.swift b/Pods/Telegraph/Sources/Protocols/HTTP/Handlers/HTTPErrorHandler.swift
new file mode 100644
index 0000000..cd4775b
--- /dev/null
+++ b/Pods/Telegraph/Sources/Protocols/HTTP/Handlers/HTTPErrorHandler.swift
@@ -0,0 +1,13 @@
+//
+//  HTTPErrorHandler.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 2/4/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+import Foundation
+
+public protocol HTTPErrorHandler {
+  func respond(to error: Error) -> HTTPResponse?
+}
diff --git a/Pods/Telegraph/Sources/Protocols/HTTP/Handlers/HTTPFileHandler.swift b/Pods/Telegraph/Sources/Protocols/HTTP/Handlers/HTTPFileHandler.swift
new file mode 100644
index 0000000..0f14b9a
--- /dev/null
+++ b/Pods/Telegraph/Sources/Protocols/HTTP/Handlers/HTTPFileHandler.swift
@@ -0,0 +1,127 @@
+//
+//  HTTPFileHandler.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 5/16/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+//
+
+import Foundation
+
+open class HTTPFileHandler: HTTPRequestHandler {
+  public private(set) var directoryURL: URL
+  public private(set) var baseURI: URI
+  public private(set) var index: String?
+
+  private typealias ByteRange = (UInt64, UInt64?)
+
+  /// Creates a HTTPFileHandler to serve the provided directory at the provided URI.
+  public init(directoryURL: URL, baseURI: URI = .root, index: String? = "index.html") {
+    self.directoryURL = directoryURL
+    self.baseURI = baseURI
+    self.index = index
+  }
+
+  /// Creates a response to the provided request or passes it to the next handler.
+  open func respond(to request: HTTPRequest, nextHandler: HTTPRequest.Handler) throws -> HTTPResponse? {
+    // Only respond to GET requests targetted at our path
+    guard request.method == .GET, let relativePath = request.uri.relativePath(from: baseURI.path) else {
+      return try nextHandler(request)
+    }
+
+    // Construct the full resource URL
+    let resourceURL = directoryURL.appendingPathComponent(relativePath)
+    var byteRange: ByteRange?
+
+    // Is a specific range requested? Fallback to a non-range request if the range isn't about bytes
+    if let rangeInHeaders = request.headers.range, let byteRangeInHeaders = byteRangeFrom(rangeInHeaders) {
+      byteRange = byteRangeInHeaders
+    }
+
+    return try responseForURL(resourceURL, byteRange: byteRange)
+  }
+
+  /// Creates a response that serves the provided URL.
+  private func responseForURL(_ url: URL, byteRange: ByteRange?) throws -> HTTPResponse {
+    let fileManager = FileManager.default
+
+    // Check if the requested path exists
+    guard let attributes = try? fileManager.attributesOfItem(atPath: url.path) as NSDictionary else {
+      return HTTPResponse(.notFound)
+    }
+
+    // Determine the type of the requested resource
+    guard let rawResourceType = attributes.fileType() else { return HTTPResponse(.forbidden) }
+    let resourceType = FileAttributeType(rawValue: rawResourceType)
+
+    // Allow directories
+    if resourceType == .typeDirectory {
+      guard let index = index else { return HTTPResponse(.forbidden) }
+
+      // Create a response based on the index file in the directory
+      let indexURL = url.appendingPathComponent(index, isDirectory: false)
+      return try responseForURL(indexURL, byteRange: byteRange)
+    }
+
+    // Only provide the data of files and symbolic links
+    guard resourceType == .typeRegular || resourceType == .typeSymbolicLink else {
+      return HTTPResponse(.forbidden)
+    }
+
+    // Construct a response
+    let response = HTTPResponse()
+    response.headers.contentType = fileManager.mimeType(of: url)
+    response.headers.lastModified = attributes.fileModificationDate()?.rfc1123
+
+    // Is a range requested?
+    if let (byteStart, byteEndOrNil) = byteRange {
+      // Open a file handle and move the pointer to the start byte
+      let fileHandle = try FileHandle(forReadingFrom: url)
+      fileHandle.seek(toFileOffset: byteStart)
+
+      // Determine the size of the file and the end of the range
+      let fileSize = attributes.fileSize()
+      let byteEnd = byteEndOrNil ?? fileSize - 1
+
+      // Validate the range, if something is wrong respond with a 416 (Range Not Satisfiable)
+      if byteStart >= fileSize || byteEnd >= fileSize || byteEnd < byteStart {
+        return HTTPResponse(.rangeNotSatisfiable, headers: [.contentRange: "bytes */\(fileSize)"])
+      }
+
+      // Add the header that describes the range in the response
+      response.headers.contentRange = "bytes \(byteStart)-\(byteEnd)/\(fileSize)"
+
+      // Add the segment from the file as the response body (range is inclusive, therefor + 1)
+      response.status = .partialContent
+      response.body = fileHandle.readData(ofLength: Int(byteEnd - byteStart) + 1)
+    } else {
+      // Add the whole file as the response body
+      response.status = .ok
+      response.body = try Data(contentsOf: url)
+    }
+
+    return response
+  }
+
+  /// Extracts the byte range from the provided String.
+  private func byteRangeFrom(_ range: String) -> ByteRange? {
+    // Make sure that the range syntax is valid (e.g. bytes=0-)
+    guard range.count >= 8, range.hasPrefix("bytes=") else { return nil }
+    let bytes = range.suffix(range.count - 6).split(separator: "-")
+
+    switch bytes.count {
+    case 1:
+      // Only a start range? (e.g. bytes=100-)
+      guard let rangeStart = UInt64(bytes[0]) else { return nil }
+      return (rangeStart, nil)
+    case 2:
+      // Both start and end range? (e.g. bytes=0-100)
+      guard let rangeStart = UInt64(bytes[0]), let rangeEnd = UInt64(bytes[1]) else { return nil }
+      return (rangeStart, rangeEnd)
+    default:
+      // The rest is invalid
+      return nil
+    }
+  }
+}
diff --git a/Pods/Telegraph/Sources/Protocols/HTTP/Handlers/HTTPRequestHandler.swift b/Pods/Telegraph/Sources/Protocols/HTTP/Handlers/HTTPRequestHandler.swift
new file mode 100644
index 0000000..73cae84
--- /dev/null
+++ b/Pods/Telegraph/Sources/Protocols/HTTP/Handlers/HTTPRequestHandler.swift
@@ -0,0 +1,26 @@
+//
+//  HTTPRequestHandler.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 2/19/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+import Foundation
+
+public protocol HTTPRequestHandler {
+  func respond(to request: HTTPRequest, nextHandler: HTTPRequest.Handler) throws -> HTTPResponse?
+}
+
+public extension HTTPRequest {
+  typealias Handler = (HTTPRequest) throws -> HTTPResponse?
+}
+
+extension Collection where Element == HTTPRequestHandler {
+  // Creates a closure chain with all of the handlers
+  func chain(lastHandler: @escaping HTTPRequest.Handler = { _ in nil }) -> HTTPRequest.Handler {
+    return reversed().reduce(lastHandler) { nextHandler, handler in
+      return { request in try handler.respond(to: request, nextHandler: nextHandler) }
+    }
+  }
+}
diff --git a/Pods/Telegraph/Sources/Protocols/HTTP/Models/HTTPConfig.swift b/Pods/Telegraph/Sources/Protocols/HTTP/Models/HTTPConfig.swift
new file mode 100644
index 0000000..5fe4019
--- /dev/null
+++ b/Pods/Telegraph/Sources/Protocols/HTTP/Models/HTTPConfig.swift
@@ -0,0 +1,37 @@
+//
+//  HTTPConfig.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 2/20/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+import Foundation
+
+public struct HTTPConfig {
+  /// The maximum time the connection will wait for incoming data.
+  public var readTimeout: TimeInterval = 60
+
+  /// The maximum time the connection will wait for writing header data.
+  public var writeHeaderTimeout: TimeInterval = 30
+
+  /// The maximum time the connection will wait for writing body data.
+  public var writeBodyTimeout: TimeInterval = 300
+
+  /// The handler that will create a response for an error during a request.
+  public var errorHandler: HTTPErrorHandler = HTTPErrorDefaultHandler()
+
+  /// The handlers that will create a response for a request.
+  public var requestHandlers: [HTTPRequestHandler] {
+    didSet { requestChain = requestHandlers.chain() }
+  }
+
+  /// A closure that joins together the request handlers.
+  internal private(set) var requestChain: HTTPRequest.Handler
+
+  /// Initializes a new HTTPConfig.
+  public init(requestHandlers: [HTTPRequestHandler]) {
+    self.requestHandlers = requestHandlers
+    self.requestChain = requestHandlers.chain()
+  }
+}
diff --git a/Pods/Telegraph/Sources/Protocols/HTTP/Models/HTTPConnection.swift b/Pods/Telegraph/Sources/Protocols/HTTP/Models/HTTPConnection.swift
new file mode 100644
index 0000000..7fdef09
--- /dev/null
+++ b/Pods/Telegraph/Sources/Protocols/HTTP/Models/HTTPConnection.swift
@@ -0,0 +1,172 @@
+//
+//  HTTPConnection.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 2/2/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+import Foundation
+
+// MARK: HTTPConnectionDelegate
+
+public protocol HTTPConnectionDelegate: class {
+  func connection(_ httpConnection: HTTPConnection, didCloseWithError error: Error?)
+  func connection(_ httpConnection: HTTPConnection, handleIncomingRequest request: HTTPRequest, error: Error?)
+  func connection(_ httpConnection: HTTPConnection, handleIncomingResponse response: HTTPResponse, error: Error?)
+  func connection(_ httpConnection: HTTPConnection, handleUpgradeByRequest request: HTTPRequest)
+}
+
+// MARK: HTTPConnection
+
+public class HTTPConnection: TCPConnection {
+  public weak var delegate: HTTPConnectionDelegate?
+
+  private let socket: TCPSocket
+  private let config: HTTPConfig
+  private var parser: HTTPParser
+  private var upgrading = false
+  private var upgradeData: Data?
+
+  /// Initializes the HTTP connection.
+  public required init(socket: TCPSocket, config: HTTPConfig) {
+    self.socket = socket
+    self.config = config
+    self.parser = HTTPParser()
+  }
+
+  /// Opens the connection.
+  public func open() {
+    socket.delegate = self
+    socket.read(timeout: config.readTimeout)
+  }
+
+  /// Closes the connection.
+  public func close(immediately: Bool) {
+    socket.close(when: immediately ? .immediately : .afterWriting)
+  }
+
+  /// Upgrades the connection.
+  public func upgrade() -> (TCPSocket, Data?) {
+    upgrading = true
+    return (socket, upgradeData)
+  }
+
+  /// Sends raw data by writing it to the stream. This can be useful for writing body data over time to a keep-alive connection.
+  public func send(data: Data, timeout: TimeInterval) {
+    socket.write(data: data, timeout: timeout)
+  }
+
+  /// Sends the request by writing it to the stream.
+  public func send(request: HTTPRequest) {
+    request.prepareForWrite()
+    request.write(to: socket, headerTimeout: config.writeHeaderTimeout, bodyTimeout: config.writeBodyTimeout)
+  }
+
+  /// Sends the response by writing it to the stream.
+  public func send(response: HTTPResponse, toRequest request: HTTPRequest) {
+    // Do not write the body for HEAD requests
+    if request.method == .HEAD {
+      response.stripBody = true
+    }
+
+    // Do not keep-alive if the request doesn't want keep-alive
+    if request.keepAlive == false {
+      response.headers.connection = "close"
+    }
+
+    // Prepare and send the response
+    response.prepareForWrite()
+    response.write(to: socket, headerTimeout: config.writeHeaderTimeout, bodyTimeout: config.writeBodyTimeout)
+
+    // Does the response request a connection upgrade?
+    if response.isConnectionUpgrade {
+      delegate?.connection(self, handleUpgradeByRequest: request)
+      return
+    }
+
+    // Close the connection after writing if not keep-alive
+    if !response.keepAlive {
+      close(immediately: false)
+    }
+  }
+
+  /// Handles incoming data.
+  private func received(data: Data) {
+    do {
+      let bytesParsed = try parser.parse(data: data)
+
+      // Do we detect a connection upgrade?
+      if parser.isUpgradeDetected {
+        upgrading = true
+
+        // The data might have contained data of the new protocol
+        if bytesParsed < data.count {
+          upgradeData = data.subdata(in: bytesParsed..<data.count)
+        }
+
+        // Handle the message, no need to reset, this connection will end
+        received(message: parser.message, error: nil)
+        return
+      }
+
+      // Do we have a complete message?
+      if parser.isMessageComplete {
+        received(message: parser.message, error: nil)
+        parser.reset()
+      }
+
+      // Continue reading
+      if !upgrading {
+        socket.read(timeout: config.readTimeout)
+      }
+    } catch {
+      // If we encounter a parser error, try to handle it gracefully
+      received(message: parser.message, error: error)
+    }
+  }
+
+  /// Handles an incoming HTTP message.
+  private func received(message: HTTPMessage?, error: Error?) {
+    switch message {
+    case let message as HTTPRequest:
+      delegate?.connection(self, handleIncomingRequest: message, error: error)
+    case let message as HTTPResponse:
+      delegate?.connection(self, handleIncomingResponse: message, error: error)
+    default:
+      close(immediately: true)
+    }
+  }
+}
+
+public extension HTTPConnection {
+  /// The local endpoint information of the connection.
+  var localEndpoint: Endpoint? {
+    return socket.localEndpoint
+  }
+
+  /// The remote endpoint information of the connection.
+  var remoteEndpoint: Endpoint? {
+    return socket.remoteEndpoint
+  }
+}
+
+// MARK: TCPSocketDelegate implementation
+
+extension HTTPConnection: TCPSocketDelegate {
+  /// Raised when the socket is connected (ignore, socket is already connected).
+  public func socketDidOpen(_ socket: TCPSocket) {}
+
+  /// Raised when the socket is disconnected.
+  public func socketDidClose(_ socket: TCPSocket, error: Error?) {
+    delegate?.connection(self, didCloseWithError: error)
+  }
+
+  /// Raised when the socket received data.
+  public func socketDidRead(_ socket: TCPSocket, data: Data, tag: Int) {
+    received(data: data)
+  }
+
+  /// Raised when the socket sent data (ignore).
+  public func socketDidWrite(_ socket: TCPSocket, tag: Int) {}
+}
diff --git a/Pods/Telegraph/Sources/Protocols/HTTP/Models/HTTPError.swift b/Pods/Telegraph/Sources/Protocols/HTTP/Models/HTTPError.swift
new file mode 100644
index 0000000..12001b3
--- /dev/null
+++ b/Pods/Telegraph/Sources/Protocols/HTTP/Models/HTTPError.swift
@@ -0,0 +1,53 @@
+//
+//  HTTPError.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 2/4/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+import Foundation
+
+public enum HTTPError: Error {
+  case unexpectedStreamEnd
+  case connectionShouldBeClosed
+
+  case protocolNotSupported
+
+  case invalidContentLength
+  case invalidHeader
+  case invalidRequest
+  case invalidMethod
+  case invalidURI
+  case invalidVersion
+
+  case headerOverflow
+  case parseFailed(code: Int)
+}
+
+extension HTTPError: CustomStringConvertible {
+  public var description: String {
+    switch self {
+    case .unexpectedStreamEnd: return "Unexpected end of stream"
+    case .connectionShouldBeClosed: return "Connection should be closed"
+
+    case .protocolNotSupported: return "Protocol not supported"
+
+    case .invalidRequest: return "Invalid request"
+    case .invalidVersion: return "Invalid HTTP version"
+    case .invalidMethod: return "Invalid HTTP method"
+    case .invalidURI: return "Invalid URI"
+    case .invalidHeader: return "Invalid Header"
+    case .invalidContentLength: return "Invalid content length"
+
+    case .headerOverflow: return "Received too many headers"
+    case .parseFailed(let code): return "Invalid data, parser failed with code \(code)"
+    }
+  }
+}
+
+extension HTTPError: LocalizedError {
+  public var errorDescription: String? {
+    return description
+  }
+}
diff --git a/Pods/Telegraph/Sources/Protocols/HTTP/Models/HTTPHeader+Common.swift b/Pods/Telegraph/Sources/Protocols/HTTP/Models/HTTPHeader+Common.swift
new file mode 100644
index 0000000..bc846b0
--- /dev/null
+++ b/Pods/Telegraph/Sources/Protocols/HTTP/Models/HTTPHeader+Common.swift
@@ -0,0 +1,236 @@
+//
+//  HTTPHeader+Common.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 7/3/19.
+//  Copyright © 2019 Building42. All rights reserved.
+//
+
+import Foundation
+
+public extension HTTPHeaderName {
+  static let accept = HTTPHeaderName("Accept")
+  static let acceptCharset = HTTPHeaderName("Accept-Charset")
+  static let acceptEncoding = HTTPHeaderName("Accept-Encoding")
+  static let acceptLanguage = HTTPHeaderName("Accept-Language")
+  static let acceptRanges = HTTPHeaderName("Accept-Ranges")
+  static let accessControlAllowOrigin = HTTPHeaderName("Access-Control-Allow-Origin")
+  static let age = HTTPHeaderName("Age")
+  static let allow = HTTPHeaderName("Allow")
+  static let authorization = HTTPHeaderName("Authorization")
+  static let cacheControl = HTTPHeaderName("Cache-Control")
+  static let connection = HTTPHeaderName("Connection")
+  static let cookie = HTTPHeaderName("Cookie")
+  static let contentDisposition = HTTPHeaderName("Content-Disposition")
+  static let contentEncoding = HTTPHeaderName("Content-Encoding")
+  static let contentLanguage = HTTPHeaderName("Content-Language")
+  static let contentLength = HTTPHeaderName("Content-Length")
+  static let contentRange = HTTPHeaderName("Content-Range")
+  static let contentType = HTTPHeaderName("Content-Type")
+  static let date = HTTPHeaderName("Date")
+  static let eTag = HTTPHeaderName("ETag")
+  static let expect = HTTPHeaderName("Expect")
+  static let expires = HTTPHeaderName("Expires")
+  static let forwarded = HTTPHeaderName("Forwarded")
+  static let host = HTTPHeaderName("Host")
+  static let lastModified = HTTPHeaderName("Last-Modified")
+  static let location = HTTPHeaderName("Location")
+  static let origin = HTTPHeaderName("Origin")
+  static let pragma = HTTPHeaderName("Pragma")
+  static let range = HTTPHeaderName("Range")
+  static let referer = HTTPHeaderName("Referer")
+  static let refresh = HTTPHeaderName("Refresh")
+  static let server = HTTPHeaderName("Server")
+  static let setCookie = HTTPHeaderName("Set-Cookie")
+  static let strictTransportSecurity = HTTPHeaderName("Strict-Transport-Security")
+  static let transferEncoding = HTTPHeaderName("Transfer-Encoding")
+  static let userAgent = HTTPHeaderName("User-Agent")
+  static let upgrade = HTTPHeaderName("Upgrade")
+}
+
+public extension Dictionary where Key == HTTPHeaderName, Value == String {
+  var accept: String? {
+    get { return self[.accept] }
+    set { self[.accept] = newValue }
+  }
+
+  var acceptCharset: String? {
+    get { return self[.acceptCharset] }
+    set { self[.acceptCharset] = newValue }
+  }
+
+  var acceptEncoding: String? {
+    get { return self[.acceptEncoding] }
+    set { self[.acceptEncoding] = newValue }
+  }
+
+  var acceptLanguage: String? {
+    get { return self[.acceptLanguage] }
+    set { self[.acceptLanguage] = newValue }
+  }
+
+  var acceptRanges: String? {
+    get { return self[.acceptRanges] }
+    set { self[.acceptRanges] = newValue }
+  }
+
+  var accessControlAllowOrigin: String? {
+    get { return self[.accessControlAllowOrigin] }
+    set { self[.accessControlAllowOrigin] = newValue }
+  }
+
+  var age: String? {
+    get { return self[.age] }
+    set { self[.age] = newValue }
+  }
+
+  var allow: String? {
+    get { return self[.allow] }
+    set { self[.allow] = newValue }
+  }
+
+  var authorization: String? {
+    get { return self[.authorization] }
+    set { self[.authorization] = newValue }
+  }
+
+  var cacheControl: String? {
+    get { return self[.cacheControl] }
+    set { self[.cacheControl] = newValue }
+  }
+
+  var connection: String? {
+    get { return self[.connection] }
+    set { self[.connection] = newValue }
+  }
+
+  var cookie: String? {
+    get { return self[.cookie] }
+    set { self[.cookie] = newValue }
+  }
+
+  var contentDisposition: String? {
+    get { return self[.contentDisposition] }
+    set { self[.contentDisposition] = newValue }
+  }
+
+  var contentEncoding: String? {
+    get { return self[.contentEncoding] }
+    set { self[.contentEncoding] = newValue }
+  }
+
+  var contentLanguage: String? {
+    get { return self[.contentLanguage] }
+    set { self[.contentLanguage] = newValue }
+  }
+
+  var contentLength: Int? {
+    get { return Int(self[.contentLength] ?? "") }
+    set { self[.contentLength] = newValue == nil ? nil : "\(newValue!)" }
+  }
+
+  var contentRange: String? {
+    get { return self[.contentRange] }
+    set { self[.contentRange] = newValue }
+  }
+
+  var contentType: String? {
+    get { return self[.contentType] }
+    set { self[.contentType] = newValue }
+  }
+
+  var date: String? {
+    get { return self[.date] }
+    set { self[.date] = newValue }
+  }
+
+  var eTag: String? {
+    get { return self[.eTag] }
+    set { self[.eTag] = newValue }
+  }
+
+  var expect: String? {
+    get { return self[.expect] }
+    set { self[.expect] = newValue }
+  }
+
+  var expires: String? {
+    get { return self[.expires] }
+    set { self[.expires] = newValue }
+  }
+
+  var forwarded: String? {
+    get { return self[.forwarded] }
+    set { self[.forwarded] = newValue }
+  }
+
+  var host: String? {
+    get { return self[.host] }
+    set { self[.host] = newValue }
+  }
+
+  var lastModified: String? {
+    get { return self[.lastModified] }
+    set { self[.lastModified] = newValue }
+  }
+
+  var location: String? {
+    get { return self[.location] }
+    set { self[.location] = newValue }
+  }
+
+  var origin: String? {
+    get { return self[.origin] }
+    set { self[.origin] = newValue }
+  }
+
+  var pragma: String? {
+    get { return self[.pragma] }
+    set { self[.pragma] = newValue }
+  }
+
+  var range: String? {
+    get { return self[.range] }
+    set { self[.range] = newValue }
+  }
+
+  var referer: String? {
+    get { return self[.referer] }
+    set { self[.referer] = newValue }
+  }
+
+  var refresh: String? {
+    get { return self[.refresh] }
+    set { self[.refresh] = newValue }
+  }
+
+  var server: String? {
+    get { return self[.server] }
+    set { self[.server] = newValue }
+  }
+
+  var setCookie: String? {
+    get { return self[.setCookie] }
+    set { self[.setCookie] = newValue }
+  }
+
+  var strictTransportSecurity: String? {
+    get { return self[.strictTransportSecurity] }
+    set { self[.strictTransportSecurity] = newValue }
+  }
+
+  var transferEncoding: String? {
+    get { return self[.transferEncoding] }
+    set { self[.transferEncoding] = newValue }
+  }
+
+  var userAgent: String? {
+    get { return self[.userAgent] }
+    set { self[.userAgent] = newValue }
+  }
+
+  var upgrade: String? {
+    get { return self[.upgrade] }
+    set { self[.upgrade] = newValue }
+  }
+}
diff --git a/Pods/Telegraph/Sources/Protocols/HTTP/Models/HTTPHeader.swift b/Pods/Telegraph/Sources/Protocols/HTTP/Models/HTTPHeader.swift
new file mode 100644
index 0000000..894c376
--- /dev/null
+++ b/Pods/Telegraph/Sources/Protocols/HTTP/Models/HTTPHeader.swift
@@ -0,0 +1,61 @@
+//
+//  HTTPHeader.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 2/8/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+import Foundation
+
+public typealias HTTPHeaders = [HTTPHeaderName: String]
+
+public struct HTTPHeaderName: Hashable {
+  private let name: String
+  private let nameInLowercase: String
+
+  /// Creates a HTTPHeader name. Header names are case insensitive according to RFC7230.
+  init(_ name: String) {
+    self.name = name
+    self.nameInLowercase = name.lowercased()
+  }
+
+  /// Returns a Boolean value indicating whether two names are equal.
+  public static func == (lhs: HTTPHeaderName, rhs: HTTPHeaderName) -> Bool {
+    return lhs.nameInLowercase == rhs.nameInLowercase
+  }
+
+  /// Hashes the name by feeding it into the given hasher.
+  public func hash(into hasher: inout Hasher) {
+    nameInLowercase.hash(into: &hasher)
+  }
+}
+
+// MARK: CustomStringConvertible implementation
+
+extension HTTPHeaderName: CustomStringConvertible {
+  public var description: String {
+    return name
+  }
+}
+
+// MARK: ExpressibleByStringLiteral implementation
+
+extension HTTPHeaderName: ExpressibleByStringLiteral {
+  public init(stringLiteral string: String) {
+    self.init(string)
+  }
+}
+
+// MARK: Convenience methods
+
+public extension Dictionary where Key == HTTPHeaderName, Value == String {
+  static var empty: HTTPHeaders {
+    return self.init(minimumCapacity: 3)
+  }
+
+  subscript(key: String) -> String? {
+    get { return self[HTTPHeaderName(key)] }
+    set { self[HTTPHeaderName(key)] = newValue }
+  }
+}
diff --git a/Pods/Telegraph/Sources/Protocols/HTTP/Models/HTTPMessage.swift b/Pods/Telegraph/Sources/Protocols/HTTP/Models/HTTPMessage.swift
new file mode 100644
index 0000000..46a0d1c
--- /dev/null
+++ b/Pods/Telegraph/Sources/Protocols/HTTP/Models/HTTPMessage.swift
@@ -0,0 +1,83 @@
+//
+//  HTTPMessage.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 1/30/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+import Foundation
+
+open class HTTPMessage {
+  public var version: HTTPVersion
+  public var headers: HTTPHeaders
+  public var body: Data
+
+  internal var firstLine: String { return "" }
+  internal var stripBody = false
+
+  /// Creates a new HTTPMessage.
+  public init(version: HTTPVersion = .default, headers: HTTPHeaders = .empty, body: Data = Data()) {
+    self.version = version
+    self.headers = headers
+    self.body = body
+  }
+
+  /// Performs last minute changes to the message, just before writing it to the stream.
+  open func prepareForWrite() {
+    // Set the keep alive connection header
+    if headers.connection == nil {
+      headers.connection = keepAlive ? "keep-alive" : "close"
+    }
+  }
+
+  /// Writes the HTTP message to the provided stream.
+  public func write(to stream: WriteStream, headerTimeout: TimeInterval, bodyTimeout: TimeInterval) {
+    writeHeader(to: stream, timeout: headerTimeout)
+    writeBody(to: stream, timeout: bodyTimeout)
+    stream.flush()
+  }
+
+  /// Writes the first line and headers to the provided stream.
+  open func writeHeader(to stream: WriteStream, timeout: TimeInterval) {
+    var head = Data()
+    head.reserveCapacity(100)
+
+    // Write the first line
+    head.append(firstLine.utf8Data)
+    head.append(.crlf)
+
+    // Write the headers
+    headers.forEach { key, value in
+      head.append("\(key): \(value)".utf8Data)
+      head.append(.crlf)
+    }
+
+    // Signal the end of the headers with another crlf
+    head.append(.crlf)
+
+    stream.write(data: head, timeout: timeout)
+  }
+
+  /// Writes the body to the provided stream.
+  open func writeBody(to stream: WriteStream, timeout: TimeInterval) {
+    if !stripBody {
+      stream.write(data: body, timeout: timeout)
+    }
+  }
+}
+
+// MARK: Helper methods
+
+public extension HTTPMessage {
+  /// Returns a boolean indicating if the connection should be kept open.
+  var keepAlive: Bool {
+    guard let connection = headers.connection else { return version.minor != 0 }
+    return connection.caseInsensitiveCompare("close") != .orderedSame
+  }
+
+  /// Returns a boolean indicating if this message carries an instruction to upgrade.
+  var isConnectionUpgrade: Bool {
+    return headers.connection?.caseInsensitiveCompare("upgrade") == .orderedSame
+  }
+}
diff --git a/Pods/Telegraph/Sources/Protocols/HTTP/Models/HTTPMethod.swift b/Pods/Telegraph/Sources/Protocols/HTTP/Models/HTTPMethod.swift
new file mode 100644
index 0000000..c59eab3
--- /dev/null
+++ b/Pods/Telegraph/Sources/Protocols/HTTP/Models/HTTPMethod.swift
@@ -0,0 +1,39 @@
+//
+//  HTTPMethod.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 1/30/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+public struct HTTPMethod: Hashable {
+  public let name: String
+}
+
+public extension HTTPMethod {
+  static let GET = HTTPMethod(name: "GET")
+  static let HEAD = HTTPMethod(name: "HEAD")
+  static let DELETE = HTTPMethod(name: "DELETE")
+  static let POST = HTTPMethod(name: "POST")
+  static let PUT = HTTPMethod(name: "PUT")
+  static let OPTIONS = HTTPMethod(name: "OPTIONS")
+  static let CONNECT = HTTPMethod(name: "CONNECT")
+  static let TRACE = HTTPMethod(name: "TRACE")
+  static let PATCH = HTTPMethod(name: "PATCH")
+}
+
+// MARK: CustomStringConvertible implementation
+
+extension HTTPMethod: CustomStringConvertible {
+  public var description: String {
+    return name
+  }
+}
+
+// MARK: ExpressibleByStringLiteral implementation
+
+extension HTTPMethod: ExpressibleByStringLiteral {
+  public init(stringLiteral string: String) {
+    self.init(name: string)
+  }
+}
diff --git a/Pods/Telegraph/Sources/Protocols/HTTP/Models/HTTPParser+Raw.swift b/Pods/Telegraph/Sources/Protocols/HTTP/Models/HTTPParser+Raw.swift
new file mode 100644
index 0000000..9117a91
--- /dev/null
+++ b/Pods/Telegraph/Sources/Protocols/HTTP/Models/HTTPParser+Raw.swift
@@ -0,0 +1,148 @@
+//
+//  HTTPParser+Raw.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 10/12/18.
+//  Copyright © 2018 Building42. All rights reserved.
+//
+
+import HTTPParserC
+
+// MARK: Types
+
+typealias HTTPRawParser = http_parser
+typealias HTTPRawParserSettings = http_parser_settings
+typealias HTTPRawParserErrorCode = http_errno
+typealias ChunkPointer = UnsafePointer<Int8>
+
+// MARK: HTTPRawParser
+
+extension HTTPRawParser {
+  /// Creates a new HTTPRawParser.
+  static func make() -> HTTPRawParser {
+    var parser = HTTPRawParser()
+    http_parser_init(&parser, HTTP_BOTH)
+    return parser
+  }
+
+  /// Parses the incoming data and returns how many bytes were parsed.
+  static func parse(parser: UnsafeMutablePointer<HTTPRawParser>, settings: UnsafeMutablePointer<HTTPRawParserSettings>, data: Data) -> Int {
+    return data.withUnsafeBytes {
+      let pointer = $0.bindMemory(to: Int8.self).baseAddress
+      return http_parser_execute(parser, settings, pointer, data.count)
+    }
+  }
+
+  /// Resets the parser.
+  static func reset(parser: UnsafeMutablePointer<HTTPRawParser>) {
+    http_parser_init(parser, HTTP_BOTH)
+  }
+
+  /// Returns the context.
+  func context<T: AnyObject>() -> T {
+    return Unmanaged<T>.fromOpaque(data).takeUnretainedValue()
+  }
+
+  /// Sets the context.
+  mutating func setContext<T: AnyObject>(_ context: T) {
+    data = Unmanaged.passUnretained(context).toOpaque()
+  }
+}
+
+extension HTTPRawParser {
+  /// Returns the content length header.
+  var contentLength: Int {
+    return content_length > Int.max ? 0 : Int(content_length)
+  }
+
+  /// Returns the error that occurred during parsing.
+  var httpError: HTTPError? {
+    if http_errno == HPE_OK.rawValue { return nil }
+    return HTTPError(code: HTTPRawParserErrorCode(http_errno))
+  }
+
+  /// Returns the HTTP method.
+  var httpMethod: HTTPMethod {
+    let methodCode = http_method(method)
+    let methodName = String(cString: http_method_str(methodCode))
+    return HTTPMethod(name: methodName)
+  }
+
+  /// Returns the HTTP status.
+  var httpStatusCode: Int {
+    return Int(status_code)
+  }
+
+  /// Returns the HTTP version.
+  var httpVersion: HTTPVersion {
+    return HTTPVersion(major: UInt(http_major), minor: UInt(http_minor))
+  }
+
+  /// Returns a boolean indicating if the parser is parsing a HTTP request.
+  var isParsingRequest: Bool {
+    return type == HTTP_REQUEST.rawValue
+  }
+
+  /// Returns a boolean indicating if the parser is parsing a HTTP request.
+  var isParsingResponse: Bool {
+    return type == HTTP_RESPONSE.rawValue
+  }
+
+  /// Returns a boolean indicating if the parser is ready to parse.
+  var isReady: Bool {
+    return http_errno == HPE_OK.rawValue
+  }
+
+  /// Returns a boolean indicating if the status has been fully parsed.
+  var isStatusComplete: Bool {
+    return state >= 16
+  }
+
+  /// Returns a boolean indicating if the parser detected a connection upgrade.
+  var isUpgradeDetected: Bool {
+    return upgrade == 1
+  }
+
+  /// Returns a boolean indicating if the URL has been fully parsed.
+  var isURLComplete: Bool {
+    return state >= 31
+  }
+}
+
+// MARK: HTTPRawParserSettings
+
+extension HTTPRawParserSettings {
+  /// Creates a new HTTPRawParserSettings.
+  static func make() -> HTTPRawParserSettings {
+    var settings = HTTPRawParserSettings()
+    http_parser_settings_init(&settings)
+    return settings
+  }
+}
+
+// MARK: RawParserErrorCode to HTTPError mapping
+
+extension HTTPError {
+  init(code: HTTPRawParserErrorCode) {
+    switch code {
+    case HPE_INVALID_EOF_STATE:
+      self = .unexpectedStreamEnd
+    case HPE_CLOSED_CONNECTION:
+      self = .connectionShouldBeClosed
+    case HPE_INVALID_VERSION:
+      self = .invalidVersion
+    case HPE_INVALID_METHOD:
+      self = .invalidMethod
+    case HPE_INVALID_URL, HPE_INVALID_HOST, HPE_INVALID_PORT, HPE_INVALID_PATH, HPE_INVALID_QUERY_STRING, HPE_INVALID_FRAGMENT:
+      self = .invalidURI
+    case HPE_INVALID_HEADER_TOKEN:
+      self = .invalidHeader
+    case HPE_INVALID_CONTENT_LENGTH:
+      self = .invalidContentLength
+    case HPE_HEADER_OVERFLOW:
+      self = .headerOverflow
+    default:
+      self = .parseFailed(code: Int(code.rawValue))
+    }
+  }
+}
diff --git a/Pods/Telegraph/Sources/Protocols/HTTP/Models/HTTPParser.swift b/Pods/Telegraph/Sources/Protocols/HTTP/Models/HTTPParser.swift
new file mode 100644
index 0000000..b85edcb
--- /dev/null
+++ b/Pods/Telegraph/Sources/Protocols/HTTP/Models/HTTPParser.swift
@@ -0,0 +1,257 @@
+//
+//  HTTPParser.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 1/31/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+import Foundation
+
+// MARK: Constants
+
+private let continueParsing: Int32 = 0
+private let stopParsing: Int32 = -1
+
+// MARK: HTTPParser
+
+public final class HTTPParser {
+  public private(set) var message: HTTPMessage?
+  public private(set) var isMessageComplete = false
+  public var isUpgradeDetected: Bool { return rawParser.isUpgradeDetected }
+
+  private var request: HTTPRequest? { return message as? HTTPRequest }
+  private var response: HTTPResponse? { return message as? HTTPResponse }
+
+  private var rawParser: HTTPRawParser
+  private var rawParserSettings: HTTPRawParserSettings
+
+  private var urlData = Data()
+  private var statusData = Data()
+  private var headerKeyData = Data()
+  private var headerValueData = Data()
+  private var headerChunkWasValue = false
+
+  /// Creates an HTTP parser.
+  public init() {
+    rawParser = HTTPRawParser.make()
+    rawParserSettings = HTTPRawParserSettings.make()
+
+    // Attach ourself as the context of the raw parser
+    rawParser.setContext(self)
+
+    // Provide the callback for when the parser is starting a new message.
+    rawParserSettings.on_message_begin = { rawParserPointer in
+      parserCall(rawParserPointer) { $0.parserDidBeginMessage($1) }
+    }
+
+    // Provide the callback for when the parser is parsing chunks of the URL.
+    rawParserSettings.on_url = { rawParserPointer, chunk, count in
+      parserCall(rawParserPointer) { $0.parserDidParseURL($1, chunk: chunk, count: count) }
+    }
+
+    // Provide the callback for when the parser is parsing chunks of the HTTP status.
+    rawParserSettings.on_status = { rawParserPointer, chunk, count in
+      parserCall(rawParserPointer) { $0.parserDidParseStatus($1, chunk: chunk, count: count) }
+    }
+
+    // Provide the callback for when the parser is parsing chunks of the header key.
+    rawParserSettings.on_header_field = { rawParserPointer, chunk, count in
+      parserCall(rawParserPointer) { $0.parserDidParseHeaderField($1, chunk: chunk, count: count) }
+    }
+
+    // Provide the callback for when the parser is parsing chunks of the header key.
+    rawParserSettings.on_header_value = { rawParserPointer, chunk, count in
+      parserCall(rawParserPointer) { $0.parserDidParseHeaderValue($1, chunk: chunk, count: count) }
+    }
+
+    // Provide the callback for when the parser is done parsing the headers.
+    rawParserSettings.on_headers_complete = { rawParserPointer in
+      parserCall(rawParserPointer) { $0.parserDidCompleteHeaders($1) }
+    }
+
+    // Provide the callback for when the parser is parsing chunks of the body.
+    rawParserSettings.on_body = { rawParserPointer, chunk, count in
+      parserCall(rawParserPointer) { $0.parserDidParseBody($1, chunk: chunk, count: count) }
+    }
+
+    /// Provide the callback for when the parser is done parsing a whole message.
+    rawParserSettings.on_message_complete = { rawParserPointer in
+      parserCall(rawParserPointer) { $0.parserDidCompleteMessage($1) }
+    }
+  }
+
+  /// Parses the incoming data and returns how many bytes were parsed.
+  @discardableResult public func parse(data: Data) throws -> Int {
+    // Check if the parser is ready, it might need a reset because of previous errors
+    if !rawParser.isReady {
+      HTTPRawParser.reset(parser: &rawParser)
+    }
+
+    // Parse the provided data
+    let bytesParsed = HTTPRawParser.parse(parser: &rawParser, settings: &rawParserSettings, data: data)
+
+    // Was there an error?
+    if let error = rawParser.httpError {
+      cleanup()
+      throw error
+    }
+
+    return bytesParsed
+  }
+
+  /// Resets the parser.
+  public func reset() {
+    isMessageComplete = false
+    message = nil
+  }
+
+  /// Clears the helper variables.
+  private func cleanup() {
+    urlData.count = 0
+    statusData.count = 0
+
+    headerKeyData.count = 0
+    headerValueData.count = 0
+    headerChunkWasValue = false
+  }
+}
+
+// MARK: HTTPParser callbacks
+
+extension HTTPParser {
+  /// Raised when the raw parser starts a new message.
+  func parserDidBeginMessage(_ rawParser: HTTPRawParser) -> Int32 {
+    isMessageComplete = false
+    message = rawParser.isParsingRequest ? HTTPRequest() : HTTPResponse()
+    return continueParsing
+  }
+
+  /// Raised when the raw parser parsed part of the URL.
+  func parserDidParseURL(_ rawParser: HTTPRawParser, chunk: ChunkPointer?, count: Int) -> Int32 {
+    urlData.append(chunk, count: count)
+
+    // Not done parsing the URI? Continue
+    guard rawParser.isURLComplete else { return continueParsing }
+
+    // Check that the URI is valid
+    guard let uriString = String(data: urlData, encoding: .utf8),
+      let uriComponents = URLComponents(string: uriString) else { return stopParsing }
+
+    // Set the URI, method and the host header
+    request?.uri = URI(components: uriComponents)
+    request?.method = rawParser.httpMethod
+    request?.setHostHeader(host: uriComponents.host, port: uriComponents.port)
+
+    return continueParsing
+  }
+
+  /// Raised when the raw parser parsed part of the status.
+  func parserDidParseStatus(_ rawParser: HTTPRawParser, chunk: ChunkPointer?, count: Int) -> Int32 {
+    statusData.append(chunk, count: count)
+
+    // Not done parsing the status? Continue
+    guard rawParser.isStatusComplete else { return continueParsing }
+
+    // Validate and set the status
+    guard let phrase = String(data: statusData, encoding: .utf8) else { return stopParsing }
+    response?.status = HTTPStatus(code: rawParser.httpStatusCode, phrase: phrase)
+
+    return continueParsing
+  }
+
+  /// Raised when the parser parsed part of a header field.
+  func parserDidParseHeaderField(_ rawParser: HTTPRawParser, chunk: ChunkPointer?, count: Int) -> Int32 {
+    // For each header we first get key chunks and then value chunks,
+    // when we get to a key chunk after a value chunk it means a single header is done
+    if headerChunkWasValue {
+      guard headerComplete() else { return stopParsing }
+    }
+
+    headerKeyData.append(chunk, count: count)
+    return continueParsing
+  }
+
+  /// Raised when the parser parsed part of a header value.
+  func parserDidParseHeaderValue(_ rawParser: HTTPRawParser, chunk: ChunkPointer?, count: Int) -> Int32 {
+    headerChunkWasValue = true
+
+    headerValueData.append(chunk, count: count)
+    return continueParsing
+  }
+
+  /// Raised when a single header key and value is complete.
+  private func headerComplete() -> Bool {
+    // Reset variables after we added the header
+    defer {
+      headerKeyData.count = 0
+      headerValueData.count = 0
+      headerChunkWasValue = false
+    }
+
+    // Make sure that the header data consists of valid String content
+    guard let headerKey = String(bytes: headerKeyData, encoding: .utf8) else { return false }
+    guard let headerValue = String(bytes: headerValueData, encoding: .utf8) else { return false }
+
+    // If the header already exists add it comma separated
+    if let existingValue = message?.headers[headerKey] {
+      message?.headers[headerKey] = "\(existingValue),\(headerValue)"
+    } else {
+      message?.headers[headerKey] = headerValue
+    }
+
+    return true
+  }
+
+  /// Raised when the parser parsed the headers.
+  func parserDidCompleteHeaders(_ rawParser: HTTPRawParser) -> Int32 {
+    guard let message = message else { return stopParsing }
+
+    // Set the HTTP version
+    message.version = rawParser.httpVersion
+
+    // Reserve capacity for the body
+    if let contentLength = message.headers.contentLength {
+      message.body.reserveCapacity(contentLength)
+    }
+
+    // Complete the last header
+    if headerChunkWasValue {
+      guard headerComplete() else { return stopParsing }
+    }
+
+    return continueParsing
+  }
+
+  /// Raised when the parser parsed part of the body.
+  func parserDidParseBody(_ rawParser: HTTPRawParser, chunk: ChunkPointer?, count: Int) -> Int32 {
+    message?.body.append(chunk, count: count)
+    return continueParsing
+  }
+
+  /// Raised when the parser parsed the whole message.
+  func parserDidCompleteMessage(_ rawParser: HTTPRawParser) -> Int32 {
+    isMessageComplete = true
+    cleanup()
+
+    return continueParsing
+  }
+}
+
+// MARK: C helpers
+
+private func parserCall(_ rawParserPointer: UnsafeMutablePointer<HTTPRawParser>?, block: (HTTPParser, HTTPRawParser) -> Int32) -> Int32 {
+  guard let rawParser = rawParserPointer?.pointee else { return stopParsing }
+  let parser: HTTPParser = rawParser.context()
+  return block(parser, rawParser)
+}
+
+// MARK: Data extensions
+
+private extension Data {
+  /// Appends the bytes to the data object.
+  mutating func append(_ chunk: ChunkPointer?, count: Int) {
+    guard let chunk = chunk else { return }
+    self.append(UnsafeRawPointer(chunk).assumingMemoryBound(to: UInt8.self), count: count)
+  }
+}
diff --git a/Pods/Telegraph/Sources/Protocols/HTTP/Models/HTTPRequest+Host.swift b/Pods/Telegraph/Sources/Protocols/HTTP/Models/HTTPRequest+Host.swift
new file mode 100644
index 0000000..9599fc9
--- /dev/null
+++ b/Pods/Telegraph/Sources/Protocols/HTTP/Models/HTTPRequest+Host.swift
@@ -0,0 +1,27 @@
+//
+//  HTTPRequest+Host.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 2/20/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+import Foundation
+
+public extension HTTPRequest {
+  // Sets the host header to the specified host and port.
+  func setHostHeader(host: String?, port: Int? = nil) {
+    var value: String?
+
+    if let host = host {
+      value = "\(host)"
+
+      // The default port is 80, no need to send that
+      if let port = port, port != 80 {
+        value?.append(":\(port)")
+      }
+    }
+
+    headers.host = value
+  }
+}
diff --git a/Pods/Telegraph/Sources/Protocols/HTTP/Models/HTTPRequest.swift b/Pods/Telegraph/Sources/Protocols/HTTP/Models/HTTPRequest.swift
new file mode 100644
index 0000000..a073c46
--- /dev/null
+++ b/Pods/Telegraph/Sources/Protocols/HTTP/Models/HTTPRequest.swift
@@ -0,0 +1,44 @@
+//
+//  HTTPRequest.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 1/31/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+open class HTTPRequest: HTTPMessage {
+  public typealias Params = [String: String]
+
+  public var method: HTTPMethod
+  public var uri: URI
+  public var params = Params()
+
+  /// Creates a new HTTPRequest.
+  public init(_ method: HTTPMethod = .GET, uri: URI = .root, version: HTTPVersion = .default,
+              headers: HTTPHeaders = .empty, body: Data = Data()) {
+    self.method = method
+    self.uri = uri
+    super.init(version: version, headers: headers, body: body)
+  }
+
+  override internal var firstLine: String {
+    // The first line looks like this: GET / HTTP/1.1
+    return "\(method) \(uri) \(version)"
+  }
+
+  override open func prepareForWrite() {
+    super.prepareForWrite()
+
+    // Write the content length only if we have a body
+    headers.contentLength = body.isEmpty ? nil : body.count
+  }
+}
+
+// MARK: CustomStringConvertible implementation
+
+extension HTTPRequest: CustomStringConvertible {
+  public var description: String {
+    let typeName = type(of: self)
+    return "<\(typeName): \(method) \(uri) \(version), headers: \(headers.count), body: \(body.count)>"
+  }
+}
diff --git a/Pods/Telegraph/Sources/Protocols/HTTP/Models/HTTPResponse.swift b/Pods/Telegraph/Sources/Protocols/HTTP/Models/HTTPResponse.swift
new file mode 100644
index 0000000..9a050ed
--- /dev/null
+++ b/Pods/Telegraph/Sources/Protocols/HTTP/Models/HTTPResponse.swift
@@ -0,0 +1,69 @@
+//
+//  HTTPResponse.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 1/31/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+import Foundation
+
+open class HTTPResponse: HTTPMessage {
+  public typealias Handler = (HTTPResponse, Error) -> Void
+
+  public var status: HTTPStatus
+
+  /// Initializes a new HTTPResponse
+  public init(_ status: HTTPStatus = .ok, version: HTTPVersion = .default,
+              headers: HTTPHeaders = .empty, body: Data = Data()) {
+    self.status = status
+    super.init(version: version, headers: headers, body: body)
+  }
+
+  /// Writes the first line of the response, e.g. HTTP/1.1 200 OK
+  override internal var firstLine: String {
+    return "\(version) \(status)"
+  }
+
+  /// Prepares the response to be written tot the stream
+  override open func prepareForWrite() {
+    super.prepareForWrite()
+
+    // Set the date header
+    headers.date = Date().rfc1123
+
+    // If a body is allowed set the content length (even when 0)
+    if status.supportsBody {
+      headers.contentLength = body.count
+    } else {
+      headers.contentLength = nil
+      body.count = 0
+    }
+  }
+}
+
+// MARK: Convenience initializers
+
+public extension HTTPResponse {
+  /// Creates an HTTP response to send textual content.
+  convenience init(_ status: HTTPStatus = .ok, headers: HTTPHeaders = .empty, content: String) {
+    self.init(status, headers: headers, body: content.utf8Data)
+  }
+
+  /// Creates an HTTP response to send an error.
+  convenience init(_ status: HTTPStatus = .internalServerError, headers: HTTPHeaders = .empty, error: Error) {
+    var errorHeaders = headers
+    errorHeaders.connection = "close"
+
+    self.init(status, headers: errorHeaders, body: error.localizedDescription.utf8Data)
+  }
+}
+
+// MARK: CustomStringConvertible
+
+extension HTTPResponse: CustomStringConvertible {
+  public var description: String {
+    let typeName = type(of: self)
+    return "<\(typeName): \(version) \(status), headers: \(headers.count), body: \(body.count)>"
+  }
+}
diff --git a/Pods/Telegraph/Sources/Protocols/HTTP/Models/HTTPStatus.swift b/Pods/Telegraph/Sources/Protocols/HTTP/Models/HTTPStatus.swift
new file mode 100644
index 0000000..db49395
--- /dev/null
+++ b/Pods/Telegraph/Sources/Protocols/HTTP/Models/HTTPStatus.swift
@@ -0,0 +1,305 @@
+//
+//  HTTPStatus.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 1/30/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+//  For more information see:
+//  https://httpwg.org/specs/rfc7231.html#status.codes
+//  https://en.wikipedia.org/wiki/List_of_HTTP_status_codes
+//
+
+public struct HTTPStatus: Hashable {
+  /// The numeric code of the status (e.g. 404).
+  public let code: Int
+
+  /// The phrase describing the status (e.g. "Not Found").
+  public let phrase: String
+
+  /// Indicates if the status is compared on code and phrase (true) or code only (false).
+  public let strict: Bool
+
+  /// Creates a HTTPStatus.
+  /// - Parameter code: The numeric code of the status (e.g. 404)
+  /// - Parameter phrase: The phrase describing the status (e.g. "Not Found").
+  /// - Parameter strict: The status is compared on code and phrase (true) or code only (false).
+  public init(code: Int, phrase: String, strict: Bool = false) {
+    self.code = code
+    self.phrase = phrase
+    self.strict = strict
+  }
+}
+
+// MARK: Variables
+
+public extension HTTPStatus {
+  /// Indicates if the status is used for informational purposes.
+  var isInformational: Bool {
+    return code >= 100 && code < 200
+  }
+
+  /// Indicates if the status describes a succesful operation.
+  var isSuccess: Bool {
+    return code >= 200 && code < 300
+  }
+
+  /// Indicates if the status describes a redirection.
+  var isRedirection: Bool {
+    return code >= 300 && code < 400
+  }
+  /// Indicates if the status describes a client error.
+  var isClientError: Bool {
+    return code >= 400 && code < 500
+  }
+  /// Indicates if the status describes a server error.
+  var isServerError: Bool {
+    return code >= 500 && code < 600
+  }
+
+  /// Indicates if the message should have a body when this status is used.
+  var supportsBody: Bool {
+    return !isInformational && self != .noContent && self != .notModified
+  }
+}
+
+// MARK: Equatable implementation
+
+public extension HTTPStatus {
+  static func == (lhs: HTTPStatus, rhs: HTTPStatus) -> Bool {
+    if lhs.code != rhs.code { return false }
+    if lhs.strict == false && rhs.strict == false { return true }
+    return lhs.phrase == rhs.phrase
+  }
+}
+
+// MARK: CustomStringConvertible implementation
+
+extension HTTPStatus: CustomStringConvertible {
+  public var description: String {
+    return "\(code) \(phrase)"
+  }
+}
+
+// MARK: - Status: Informational
+
+public extension HTTPStatus {
+  /// 100 Continue: the server has received the request headers and the client should proceed to send the request body.
+  static let `continue` = HTTPStatus(code: 100, phrase: "Continue")
+
+  /// 101 Switching Protocols: requester has asked the server to switch protocols and the server has agreed to do so.
+  static let switchingProtocols = HTTPStatus(code: 101, phrase: "Switching Protocols")
+
+  /// 102 Processing: server has received and is processing the request, but no response is available yet.
+  static let processing = HTTPStatus(code: 102, phrase: "Processing")
+}
+
+// MARK: - Status: Success
+
+public extension HTTPStatus {
+  /// 200 OK: standard response for successful HTTP requests.
+  static let ok = HTTPStatus(code: 200, phrase: "OK")
+
+  /// 201 Created: request has been fulfilled, resulting in the creation of a new resource.
+  static let created = HTTPStatus(code: 201, phrase: "Created")
+
+  /// 202 Accepted: request has been accepted for processing, but the processing has not been completed.
+  static let accepted = HTTPStatus(code: 202, phrase: "Accepted")
+
+  /// 203 Non-Authoritative Information: server is a transforming proxy that received a 200 OK from its origin,
+  /// but is returning a modified version of the origin's response.
+  static let nonAuthoritativeInformation = HTTPStatus(code: 203, phrase: "Non-Authoritative Information")
+
+  /// 204 No Content: server successfully processed the request and is not returning any content.
+  static let noContent = HTTPStatus(code: 204, phrase: "No Content")
+
+  /// 205 Reset Content: same as 204 No Content, but requires the requester to reset the document view.
+  static let resetContent = HTTPStatus(code: 205, phrase: "Reset Content")
+
+  /// 206 Partial Content: server is delivering only part of the resource due to a range header sent by the client.
+  static let partialContent = HTTPStatus(code: 206, phrase: "Partial Content")
+
+  /// 207 Multi-Status: message body that follows is by default an XML message and can contain a number of separate
+  /// response codes, depending on how many sub-requests were made.
+  static let multiStatus = HTTPStatus(code: 207, phrase: "Multi-Status")
+
+  /// 208 Already Reported: members of a DAV binding have already been enumerated in a preceding part of
+  /// the (multistatus) response, and are not being included again.
+  static let alreadyReported = HTTPStatus(code: 208, phrase: "Already Reported")
+
+  /// 226 IM Used: server has fulfilled a request for the resource, and the response is a representation of
+  /// the result of one or more instance-manipulations applied to the current instance.
+  static let imUsed = HTTPStatus(code: 226, phrase: "IM Used")
+}
+
+// MARK: - Status: Redirection
+
+public extension HTTPStatus {
+  /// 300 Multiple Choices: indicates multiple options for the resource from which the client may
+  /// choose via agent-driven content negotiation.
+  static let multipleChoices = HTTPStatus(code: 300, phrase: "Multiple Choices")
+
+  /// 301 Moved Permanently: this and all future requests should be directed to the given URI.
+  static let movedPermanently = HTTPStatus(code: 301, phrase: "Moved Permanently")
+
+  /// 302 Found: tells the client to browse to another url. 302 has been superseded by 303 and 307.
+  static let found = HTTPStatus(code: 302, phrase: "Found")
+
+  /// 303 See Other: response to the request can be found under another URI using the GET method.
+  static let seeOther = HTTPStatus(code: 303, phrase: "See Other")
+
+  /// 304 Not Modified: the resource has not been modified since the version specified by the request
+  /// headers If-Modified-Since or If-None-Match.
+  static let notModified = HTTPStatus(code: 304, phrase: "Not Modified")
+
+  /// 305 Use Proxy: resource is available only through a proxy, the address is provided in the response.
+  static let useProxy = HTTPStatus(code: 305, phrase: "Use Proxy")
+
+  /// 307 Temporary Redirect: request should be repeated with another URI; however, future requests
+  /// should still use the original URI.
+  static let temporaryRedirect = HTTPStatus(code: 307, phrase: "Temporary Redirect")
+
+  /// 308 Permanent Redirect: request and all future requests should be repeated using another URI.
+  /// 307 and 308 parallel the behaviors of 302 and 301, but do not allow the HTTP method to change.
+  static let permanentRedirect = HTTPStatus(code: 308, phrase: "Permanent Redirect")
+}
+
+// MARK: - Status: Client Errors
+
+public extension HTTPStatus {
+  /// 400 Bad Request: server cannot or will not process the request due to an apparent client error.
+  static let badRequest = HTTPStatus(code: 400, phrase: "Bad Request")
+
+  /// 401 Unauthorized: similar to 403 Forbidden, but specifically for use when authentication is
+  /// required and has failed or has not yet been provided.
+  static let unauthorized = HTTPStatus(code: 401, phrase: "Unauthorized")
+
+  /// 402 Payment Required: reserved for future use, can be used to signal that the resource is
+  /// temporarily not available because fees have not been paid.
+  static let paymentRequired = HTTPStatus(code: 402, phrase: "Payment Required")
+
+  /// 403 Forbidden: request was valid, but the server is refusing action. The user might not
+  /// have the necessary permissions for a resource, or may need an account of some sort.
+  static let forbidden = HTTPStatus(code: 403, phrase: "Forbidden")
+
+  /// 404 Not Found: requested resource could not be found but may be available in the future.
+  static let notFound = HTTPStatus(code: 404, phrase: "Not Found")
+
+  /// 405 Method Not Allowed: request method is not supported for the requested resource.
+  static let methodNotAllowed = HTTPStatus(code: 405, phrase: "Method Not Allowed")
+
+  /// 406 Not Acceptable: equested resource is capable of generating only content not acceptable
+  /// according to the Accept headers sent in the request.
+  static let notAcceptable = HTTPStatus(code: 406, phrase: "Not Acceptable")
+
+  /// 407 Proxy Authentication Required: client must first authenticate itself with the proxy.
+  static let proxyAuthenticationRequired = HTTPStatus(code: 407, phrase: "Proxy Authentication Required")
+
+  /// 408 Request Timneout: server timed out waiting for the request.
+  static let requestTimeout = HTTPStatus(code: 408, phrase: "Request Timeout")
+
+  /// 409 Conflict: the request could not be processed because of conflict in the current state
+  /// of the resource. such as an edit conflict between multiple simultaneous updates.
+  static let conflict = HTTPStatus(code: 409, phrase: "Conflict")
+
+  /// 410 Gone: the resource requested is no longer available and will not be available again.
+  static let gone = HTTPStatus(code: 410, phrase: "Gone")
+
+  /// 411 Length Required: request did not specify the length of its content, which is
+  /// required by the requested resource.
+  static let lengthRequired = HTTPStatus(code: 411, phrase: "Length Required")
+
+  /// 412 Precondition Failed: server does not meet one of the preconditions that the requester put on the request.
+  static let preconditionFailed = HTTPStatus(code: 412, phrase: "Precondition Failed")
+
+  /// 413 Payload Too Large: request is larger than the server is willing or able to process.
+  static let payloadTooLarge = HTTPStatus(code: 413, phrase: "Payload Too Large")
+
+  /// 414 URI Too Long: the URI provided was too long for the server to process.
+  static let uriTooLong = HTTPStatus(code: 414, phrase: "URI Too Long")
+
+  /// 415 Unsupported Media Type: request entity has a media type which the server or resource does not support.
+  static let unsupportedMediaType = HTTPStatus(code: 415, phrase: "Unsupported Media Type")
+
+  /// 416 Range Not Satisfiable: client has asked for a portion of the file, but the server cannot
+  /// supply that portion.
+  static let rangeNotSatisfiable = HTTPStatus(code: 416, phrase: "Range Not Satisfiable")
+
+  /// 417 Expectation Failed: server cannot meet the requirements of the Expect request-header field.
+  static let expectationFailed = HTTPStatus(code: 417, phrase: "Expectation Failed")
+
+  /// 421 Misdirected Request: request was directed at a server that is not able to produce a response
+  /// (for example because of connection reuse).
+  static let misdirectedRequest = HTTPStatus(code: 421, phrase: "Misdirected Request")
+
+  /// 422 Unprocessable Entity: request was well-formed but was unable to be followed due to semantic errors.
+  static let unprocessableEntity = HTTPStatus(code: 422, phrase: "Unprocessable Entity")
+
+  /// 423 Locked: resource that is being accessed is locked.
+  static let locked = HTTPStatus(code: 423, phrase: "Locked")
+
+  /// 424 Failed Dependency: request failed because it depended on another request and that request failed.
+  static let failedDependency = HTTPStatus(code: 424, phrase: "Failed Dependency")
+
+  /// 426 Upgrade Required: client should switch to the protocol specified by the Upgrade header field.
+  static let upgradeRequired = HTTPStatus(code: 426, phrase: "Upgrade Required")
+
+  /// 428 Precondition Required: origin server requires the request to be conditional. Intended to prevent
+  /// the 'lost update' problem, where a client GETs a resource's state, modifies it, and PUTs it back to
+  /// the server, when meanwhile a third party has modified the state on the server, leading to a conflict.
+  static let preconditionRequired = HTTPStatus(code: 428, phrase: "Precondition Required")
+
+  /// 429 Too Many Requests: user has sent too many requests in a given amount of time. Intended for use
+  /// with rate-limiting schemes.
+  static let tooManyRequests = HTTPStatus(code: 429, phrase: "Too Many Requests")
+
+  /// 431 Request Header Fields Too Large: server is unwilling to process the request because either an
+  /// individual header field, or all the header fields collectively, are too large.
+  static let requestHeaderFieldsTooLarge = HTTPStatus(code: 431, phrase: "Request Header Fields Too Large")
+
+  /// 451 Unavailable For Legal Reasons: server operator has received a legal demand to deny access to
+  /// a resource or to a set of resources that includes the requested resource.
+  static let unavailableForLegalReasons = HTTPStatus(code: 451, phrase: "Unavailable For Legal Reasons")
+}
+
+// MARK: - Status: Server Errors
+
+public extension HTTPStatus {
+  /// 500 Internal Server Error: generic error message, given when an unexpected condition was encountered
+  /// and no more specific message is suitable
+  static let internalServerError = HTTPStatus(code: 500, phrase: "Internal Server Error")
+
+  /// 501 Not Implemented: server either does not recognize the request method, or it lacks the ability
+  /// to fulfil the request.
+  static let notImplemented = HTTPStatus(code: 501, phrase: "Not Implemented")
+
+  /// 502 Bad Gateway: server was acting as a gateway or proxy and received an invalid response
+  /// from the upstream server.
+  static let badGateway = HTTPStatus(code: 502, phrase: "Bad Gateway")
+
+  /// 503 Service Unavailable: server is currently unavailable (e.g. overloaded or down for maintenance).
+  static let serviceUnavailable = HTTPStatus(code: 503, phrase: "Service Unavailable")
+
+  /// 504 Gateway Timeout: server was acting as a gateway or proxy and did not receive a timely response
+  /// from the upstream server.
+  static let gatewayTimeout = HTTPStatus(code: 504, phrase: "Gateway Timeout")
+
+  /// 505 HTTP Version Not Supported: server does not support the HTTP protocol version used in the request.
+  static let httpVersionNotSupported = HTTPStatus(code: 505, phrase: "HTTP Version Not Supported")
+
+  /// 506 Vairant Also Negotiates: transparent content negotiation for the request results in a circular reference.
+  static let variantAlsoNegotiates = HTTPStatus(code: 506, phrase: "Variant Also Negotiates")
+
+  /// 507 Insufficient Storage: server is unable to store the representation needed to complete the request.
+  static let insufficientStorage = HTTPStatus(code: 507, phrase: "Insufficient Storage")
+
+  /// 508 Loop Detected: server detected an infinite loop while processing the request.
+  static let loopDetected = HTTPStatus(code: 508, phrase: "Loop Detected")
+
+  /// 510 Not Extended: further extensions to the request are required for the server to fulfill it.
+  static let notExtended = HTTPStatus(code: 510, phrase: "Not Extended")
+
+  /// 511 Network Authentication Required: client needs to authenticate to gain network access.
+  /// Intended for use by intercepting proxies used to control access to the network.
+  static let networkAuthenticationRequired = HTTPStatus(code: 511, phrase: "Network Authentication Required")
+}
diff --git a/Pods/Telegraph/Sources/Protocols/HTTP/Models/HTTPVersion.swift b/Pods/Telegraph/Sources/Protocols/HTTP/Models/HTTPVersion.swift
new file mode 100644
index 0000000..074e324
--- /dev/null
+++ b/Pods/Telegraph/Sources/Protocols/HTTP/Models/HTTPVersion.swift
@@ -0,0 +1,29 @@
+//
+//  HTTPVersion.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 1/31/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+import Foundation
+
+public struct HTTPVersion {
+  public let major: UInt
+  public let minor: UInt
+
+  public init(major: UInt, minor: UInt) {
+    self.major = major
+    self.minor = minor
+  }
+}
+
+public extension HTTPVersion {
+  static let `default` = HTTPVersion(major: 1, minor: 1)
+}
+
+extension HTTPVersion: CustomStringConvertible {
+  public var description: String {
+    return "HTTP/\(major).\(minor)"
+  }
+}
diff --git a/Pods/Telegraph/Sources/Protocols/HTTP/Routing/HTTPRoute.swift b/Pods/Telegraph/Sources/Protocols/HTTP/Routing/HTTPRoute.swift
new file mode 100644
index 0000000..fd8557e
--- /dev/null
+++ b/Pods/Telegraph/Sources/Protocols/HTTP/Routing/HTTPRoute.swift
@@ -0,0 +1,109 @@
+//
+//  HTTPRoute.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 2/4/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+import Foundation
+
+public struct HTTPRoute {
+  public let methods: Set<HTTPMethod>?
+  public let handler: HTTPRequest.Handler
+
+  public let regex: Regex?
+  public let params: [HTTPRequest.Params.Key]
+
+  /// Creates a new HTTPRoute based on a regular expression pattern.
+  public init(methods: Set<HTTPMethod>? = nil, regex pattern: String? = nil, handler: @escaping HTTPRequest.Handler) throws {
+    self.methods = methods
+    self.handler = handler
+
+    let (regex, params) = try HTTPRoute.regexAndParams(pattern: pattern)
+    self.regex = regex
+    self.params = params
+  }
+
+  /// Creates a new HTTPRoute based on a URI.
+  public init(methods: Set<HTTPMethod>? = nil, uri: String, handler: @escaping HTTPRequest.Handler) throws {
+    let pattern = try HTTPRoute.routePattern(basedOn: uri)
+    try self.init(methods: methods, regex: pattern, handler: handler)
+  }
+}
+
+// MARK: Route pattern processing
+
+private extension HTTPRoute {
+  /// The regular expression to extract parameters definitions.
+  static let parameterRegex = try! Regex(pattern: #":([\w]+)"#)
+
+  /// The regular expression replacement pattern to capture parameters.
+  static let parameterCaptureGroupPattern: String = {
+    if #available(iOS 9, *) {
+      return #"(?<$1>[^\/]+)"#
+    } else {
+      return #"([^\/]+)"#
+    }
+  }()
+
+  /// Breaks a route regular expression up into the regular expression that will be used
+  /// for matching routes and a list of path parameters.
+  static func regexAndParams(pattern: String?) throws -> (Regex?, [String]) {
+    // If no regex is specified this route will match all uris
+    guard var pattern = pattern else { return (nil, []) }
+
+    // Extract the route parameters, for example /user/:id and change them to capture groups
+    let params = parameterRegex.matchAll(in: pattern).flatMap { $0.groupValues }
+    pattern = parameterRegex.stringByReplacingMatches(in: pattern, withPattern: parameterCaptureGroupPattern)
+
+    return (try Regex(pattern: pattern, options: .caseInsensitive), params)
+  }
+
+  /// Creates a route regular expression pattern based on the provided URI.
+  static func routePattern(basedOn uri: String) throws -> String {
+    // Clean up invalid paths
+    var pattern = URI(path: uri).path
+
+    // Allow easy optional slash pattern, for example /hello(/)
+    pattern = pattern.replacingOccurrences(of: "(/)", with: "/?")
+
+    // Limit what the regex will match by fixating the start and the end
+    if !pattern.hasPrefix("^") { pattern.insert("^", at: pattern.startIndex) }
+    if !pattern.hasSuffix("*") { pattern.insert("$", at: pattern.endIndex) }
+
+    return pattern
+  }
+}
+
+// MARK: Route handling
+
+public extension HTTPRoute {
+  /// Indicates if the route supports the provided HTTP method.
+  func canHandle(method: HTTPMethod) -> Bool {
+    guard let methods = methods else { return true }
+    return methods.contains(method)
+  }
+
+  /// Indicates if the route matches the provided path. Any route parameters will be extracted
+  /// and returned as a separate list.
+  func canHandle(path: String) -> (Bool, HTTPRequest.Params) {
+    // Should we allow all patterns?
+    guard let routeRegex = regex else { return (true, [:]) }
+
+    // Test if the URI matches our route
+    let matches = routeRegex.matchAll(in: path)
+    if matches.isEmpty { return (false, [:]) }
+
+    // If the URI matches our route, extract the params
+    var routeParams = HTTPRequest.Params()
+    let matchedParams = matches.flatMap { $0.groupValues }
+
+    // Create a dictionary of parameter : parameter value
+    for (key, value) in zip(params, matchedParams) {
+      routeParams[key] = value
+    }
+
+    return (true, routeParams)
+  }
+}
diff --git a/Pods/Telegraph/Sources/Protocols/HTTP/Routing/HTTPRouteHandler.swift b/Pods/Telegraph/Sources/Protocols/HTTP/Routing/HTTPRouteHandler.swift
new file mode 100644
index 0000000..15d6816
--- /dev/null
+++ b/Pods/Telegraph/Sources/Protocols/HTTP/Routing/HTTPRouteHandler.swift
@@ -0,0 +1,47 @@
+//
+//  HTTPRouteHandler.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 2/4/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+open class HTTPRouteHandler: HTTPRequestHandler {
+  public var routes = [HTTPRoute]()
+  public var implicitHeadRequests = true
+
+  open func respond(to request: HTTPRequest, nextHandler: HTTPRequest.Handler) throws -> HTTPResponse? {
+    var matchingRoute: HTTPRoute?
+
+    // Do we want to allow HEAD requests on GET routes?
+    let tryGetForHead = implicitHeadRequests && (request.method == .HEAD)
+
+    for route in routes {
+      // Skip routes that can't handle our method
+      if !route.canHandle(method: request.method) {
+
+        // Is this a HEAD request and do we want to serve this as a GET request?
+        if !tryGetForHead || !route.canHandle(method: .GET) {
+          continue
+        }
+      }
+
+      // Can our route handle the path?
+      let (canHandle, params) = route.canHandle(path: request.uri.path)
+      if !canHandle { continue }
+
+      // We found the route, transfer the URI parameters to the request
+      matchingRoute = route
+      params.forEach { request.params[$0] = $1 }
+      break
+    }
+
+    // If we found a route then call its handler
+    if let route = matchingRoute {
+      return try route.handler(request)
+    }
+
+    // Otherwise return 404 not found
+    return HTTPResponse(.notFound)
+  }
+}
diff --git a/Pods/Telegraph/Sources/Protocols/HTTP/Routing/Server+Routing.swift b/Pods/Telegraph/Sources/Protocols/HTTP/Routing/Server+Routing.swift
new file mode 100644
index 0000000..594f204
--- /dev/null
+++ b/Pods/Telegraph/Sources/Protocols/HTTP/Routing/Server+Routing.swift
@@ -0,0 +1,87 @@
+//
+//  Server+Routing.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 2/19/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+import Foundation
+
+public extension Server {
+  /// Adds a route handler consisting of a HTTP method, uri and handler closure.
+  func route(_ method: HTTPMethod, _ uri: String, _ handler: @escaping HTTPRequest.Handler) {
+    guard let httpRoute = try? HTTPRoute(methods: [method], uri: uri, handler: handler) else {
+      fatalError("Could not add route - invalid uri: \(uri)")
+    }
+
+    route(httpRoute)
+  }
+
+  /// Adds a route handler consisting of a HTTP method, uri regex and handler closure.
+  func route(_ method: HTTPMethod, regex: String, _ handler: @escaping HTTPRequest.Handler) {
+    guard let httpRoute = try? HTTPRoute(methods: [method], regex: regex, handler: handler) else {
+      fatalError("Could not add route - invalid regex: \(regex)")
+    }
+
+    route(httpRoute)
+  }
+
+  /// Adds a route.
+  func route(_ httpRoute: HTTPRoute) {
+    guard let routeHandler = httpConfig.requestHandlers.first(ofType: HTTPRouteHandler.self) else {
+      fatalError("Could not add route - the server doesn't have a route handler")
+    }
+
+    routeHandler.routes.append(httpRoute)
+  }
+}
+
+// MARK: Serve static content methods
+
+public extension Server {
+  /// Adds a route that serves files from a bundle.
+  func serveBundle(_ bundle: Bundle, _ uri: String = "/", index: String? = "index.html") {
+    serveDirectory(bundle.resourceURL!, uri, index: index)
+  }
+
+  /// Adds a route that serves files from a directory.
+  func serveDirectory(_ url: URL, _ uri: String = "/", index: String? = "index.html") {
+    let baseURI = URI(path: uri)
+
+    // Construct the uri, do not match exactly to support subdirectories
+    var routeURI = baseURI.path
+    if !routeURI.hasSuffix("*") {
+      if !routeURI.hasSuffix("/") { routeURI += "/" }
+      routeURI += "*"
+    }
+
+    // Wrap the file handler into a route
+    let handler = HTTPFileHandler(directoryURL: url, baseURI: baseURI, index: index)
+    route(.GET, routeURI) { request in
+      try handler.respond(to: request) { _ in HTTPResponse(.notFound) }
+    }
+  }
+}
+
+// MARK: Response helper methods
+
+public extension Server {
+  /// Adds a route that responds to *method* on *uri* that responds with a *response*.
+  func route(_ method: HTTPMethod, _ uri: String, response: @escaping () -> HTTPResponse) {
+    route(method, uri) { _ in response() }
+  }
+
+  /// Adds a route that responds to *method* on *uri* that responds with a *statusCode*.
+  func route(_ method: HTTPMethod, _ uri: String, status: @escaping () -> HTTPStatus) {
+    route(method, uri) { _ in HTTPResponse(status()) }
+  }
+
+  /// Adds a route that responds to *method* on *uri* that responds with *statusCode* and text content.
+  func route(_ method: HTTPMethod, _ uri: String, content: @escaping () -> (HTTPStatus, String)) {
+    route(method, uri) { _ in
+      let (status, string) = content()
+      return HTTPResponse(status, content: string)
+    }
+  }
+}
diff --git a/Pods/Telegraph/Sources/Protocols/WebSockets/Handlers/HTTPWebSocketHandler.swift b/Pods/Telegraph/Sources/Protocols/WebSockets/Handlers/HTTPWebSocketHandler.swift
new file mode 100644
index 0000000..d775ecf
--- /dev/null
+++ b/Pods/Telegraph/Sources/Protocols/WebSockets/Handlers/HTTPWebSocketHandler.swift
@@ -0,0 +1,49 @@
+//
+//  HTTPWebSocketHandler.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 2/19/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+import Foundation
+
+open class HTTPWebSocketHandler: HTTPRequestHandler {
+  let protocolName: String?
+
+  /// Creates a HTTPWebSocketHandler with the protocol name that will be used for Sec-WebSocket-Protocol.
+  public init(protocolName: String? = nil) {
+    self.protocolName = protocolName
+  }
+
+  open func respond(to request: HTTPRequest, nextHandler: HTTPRequest.Handler) throws -> HTTPResponse? {
+    // Skip if this isn't a websocket upgrade request
+    guard request.isWebSocketUpgrade else {
+      return try nextHandler(request)
+    }
+
+    // Validate the handshake
+    guard request.method == .GET else { throw HTTPError.invalidMethod }
+    guard request.version.minor == 1 else { throw HTTPError.invalidVersion }
+
+    // We must have a websocket key
+    guard let webSocketKey = request.headers.webSocketKey else {
+      return HTTPResponse(.badRequest, content: "Websocket key is missing")
+    }
+
+    // Check that we support the websocket version
+    guard request.headers.webSocketVersion == HTTPMessage.webSocketVersion else {
+      return HTTPResponse(.notImplemented, content: "Websocket version not supported")
+    }
+
+    // Check that we support the websocket protocol
+    if let serverProtocol = protocolName, let clientProtocol = request.headers.webSocketProtocol, !clientProtocol.isEmpty {
+      let clientProtocols = clientProtocol.split(separator: ",")
+      guard clientProtocols.contains(Substring(serverProtocol)) else {
+        return HTTPResponse(.notImplemented, content: "Websocket protocol not supported")
+      }
+    }
+
+    return .webSocketHandshake(key: webSocketKey, protocolName: protocolName)
+  }
+}
diff --git a/Pods/Telegraph/Sources/Protocols/WebSockets/Handlers/WebSocketErrorDefaultHandler.swift b/Pods/Telegraph/Sources/Protocols/WebSockets/Handlers/WebSocketErrorDefaultHandler.swift
new file mode 100644
index 0000000..3b65fb1
--- /dev/null
+++ b/Pods/Telegraph/Sources/Protocols/WebSockets/Handlers/WebSocketErrorDefaultHandler.swift
@@ -0,0 +1,19 @@
+//
+//  WebSocketErrorDefaultHandler.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 3/30/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+import Foundation
+
+public class WebSocketErrorDefaultHandler: WebSocketErrorHandler {
+  // See https://tools.ietf.org/html/rfc6455#page-64
+
+  public func incoming(error: Error, webSocket: WebSocket, message: WebSocketMessage?) {
+    webSocket.close(immediately: false)
+  }
+
+  public func outgoing(error: Error, webSocket: WebSocket, message: WebSocketMessage?) {}
+}
diff --git a/Pods/Telegraph/Sources/Protocols/WebSockets/Handlers/WebSocketErrorHandler.swift b/Pods/Telegraph/Sources/Protocols/WebSockets/Handlers/WebSocketErrorHandler.swift
new file mode 100644
index 0000000..5c63f69
--- /dev/null
+++ b/Pods/Telegraph/Sources/Protocols/WebSockets/Handlers/WebSocketErrorHandler.swift
@@ -0,0 +1,14 @@
+//
+//  WebSocketErrorHandler.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 2/23/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+import Foundation
+
+public protocol WebSocketErrorHandler {
+  func incoming(error: Error, webSocket: WebSocket, message: WebSocketMessage?)
+  func outgoing(error: Error, webSocket: WebSocket, message: WebSocketMessage?)
+}
diff --git a/Pods/Telegraph/Sources/Protocols/WebSockets/Handlers/WebSocketMessageDefaultHandler.swift b/Pods/Telegraph/Sources/Protocols/WebSockets/Handlers/WebSocketMessageDefaultHandler.swift
new file mode 100644
index 0000000..78dc177
--- /dev/null
+++ b/Pods/Telegraph/Sources/Protocols/WebSockets/Handlers/WebSocketMessageDefaultHandler.swift
@@ -0,0 +1,30 @@
+//
+//  WebSocketMessageDefaultHandler.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 3/30/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+import Foundation
+
+public class WebSocketMessageDefaultHandler: WebSocketMessageHandler {
+  public func incoming(message: WebSocketMessage, from webSocket: WebSocket) throws {
+    switch message.opcode {
+
+    case .connectionClose:
+      // The remote wants to close the connection
+      webSocket.close(immediately: false)
+
+    case .ping:
+      // The remote sent a ping message, we should respond with a pong with the same payload
+      webSocket.send(message: WebSocketMessage(opcode: .pong, payload: message.payload))
+
+    case .continuationFrame, .pong, .binaryFrame, .textFrame:
+      // No need to handle these opcodes
+      break
+    }
+  }
+
+  public func outgoing(message: WebSocketMessage, to webSocket: WebSocket) throws {}
+}
diff --git a/Pods/Telegraph/Sources/Protocols/WebSockets/Handlers/WebSocketMessageHandler.swift b/Pods/Telegraph/Sources/Protocols/WebSockets/Handlers/WebSocketMessageHandler.swift
new file mode 100644
index 0000000..9dd9321
--- /dev/null
+++ b/Pods/Telegraph/Sources/Protocols/WebSockets/Handlers/WebSocketMessageHandler.swift
@@ -0,0 +1,12 @@
+//
+//  WebSocketMessageHandler.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 2/23/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+public protocol WebSocketMessageHandler {
+  func incoming(message: WebSocketMessage, from webSocket: WebSocket) throws
+  func outgoing(message: WebSocketMessage, to webSocket: WebSocket) throws
+}
diff --git a/Pods/Telegraph/Sources/Protocols/WebSockets/Models/HTTPHeader+WebSocket.swift b/Pods/Telegraph/Sources/Protocols/WebSockets/Models/HTTPHeader+WebSocket.swift
new file mode 100644
index 0000000..b545f29
--- /dev/null
+++ b/Pods/Telegraph/Sources/Protocols/WebSockets/Models/HTTPHeader+WebSocket.swift
@@ -0,0 +1,38 @@
+//
+//  HTTPHeader+WebSocket.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 2/9/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+import Foundation
+
+public extension HTTPHeaderName {
+  static let webSocketAccept = HTTPHeaderName("Sec-WebSocket-Accept")
+  static let webSocketKey = HTTPHeaderName("Sec-WebSocket-Key")
+  static let webSocketProtocol = HTTPHeaderName("Sec-WebSocket-Protocol")
+  static let webSocketVersion = HTTPHeaderName("Sec-WebSocket-Version")
+}
+
+public extension Dictionary where Key == HTTPHeaderName, Value == String {
+  var webSocketAccept: String? {
+    get { return self[.webSocketAccept] }
+    set { self[.webSocketAccept] = newValue }
+  }
+
+  var webSocketKey: String? {
+    get { return self[.webSocketKey] }
+    set { self[.webSocketKey] = newValue }
+  }
+
+  var webSocketProtocol: String? {
+    get { return self[.webSocketProtocol] }
+    set { self[.webSocketProtocol] = newValue }
+  }
+
+  var webSocketVersion: String? {
+    get { return self[.webSocketVersion] }
+    set { self[.webSocketVersion] = newValue }
+  }
+}
diff --git a/Pods/Telegraph/Sources/Protocols/WebSockets/Models/HTTPMessage+WebSocket.swift b/Pods/Telegraph/Sources/Protocols/WebSockets/Models/HTTPMessage+WebSocket.swift
new file mode 100644
index 0000000..a6ee163
--- /dev/null
+++ b/Pods/Telegraph/Sources/Protocols/WebSockets/Models/HTTPMessage+WebSocket.swift
@@ -0,0 +1,77 @@
+//
+//  HTTPMessage+WebSocket.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 2/16/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+import Foundation
+
+extension HTTPMessage {
+  public static let webSocketMagicGUID = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11"
+  public static let webSocketProtocol = "websocket"
+  public static let webSocketVersion = "13"
+
+  /// Is this an upgrade to the WebSocket protocol?
+  var isWebSocketUpgrade: Bool {
+    return headers.upgrade?.caseInsensitiveCompare(HTTPMessage.webSocketProtocol) == .orderedSame
+  }
+}
+
+extension HTTPRequest {
+  /// Creates a websocket handshake request.
+  static func webSocketHandshake(host: String, port: Int = 80, protocolName: String? = nil) -> HTTPRequest {
+    let request = HTTPRequest()
+    request.webSocketHandshake(host: host, port: port, protocolName: protocolName)
+    return request
+  }
+
+  /// Decorates a request with websocket handshake headers.
+  func webSocketHandshake(host: String, port: Int = 80, protocolName: String? = nil) {
+    method = .GET
+    setHostHeader(host: host, port: port)
+
+    headers.connection = "Upgrade"
+    headers.upgrade = HTTPMessage.webSocketProtocol
+    headers.webSocketKey = Data(randomNumberOfBytes: 16).base64EncodedString()
+    headers.webSocketVersion = HTTPMessage.webSocketVersion
+
+    // Only send the 'Sec-WebSocket-Protocol' if it has a value (according to spec)
+    if let protocolName = protocolName, !protocolName.isEmpty {
+      headers.webSocketProtocol = protocolName
+    }
+  }
+}
+
+public extension HTTPResponse {
+  /// Creates a websocket handshake response.
+  static func webSocketHandshake(key: String, protocolName: String? = nil) -> HTTPResponse {
+    let response = HTTPResponse()
+    response.webSocketHandshake(key: key, protocolName: protocolName)
+    return response
+  }
+
+  /// Decorates a response with websocket handshake headers.
+  func webSocketHandshake(key: String, protocolName: String? = nil) {
+    // Take the incoming key, append the static GUID and return a base64 encoded SHA-1 hash
+    let webSocketKey = key.appending(HTTPMessage.webSocketMagicGUID)
+    let webSocketAccept = SHA1.hash(webSocketKey).base64EncodedString()
+
+    status = .switchingProtocols
+    headers.connection = "Upgrade"
+    headers.upgrade = HTTPMessage.webSocketProtocol
+    headers.webSocketAccept = webSocketAccept
+
+    // Only send the 'Sec-WebSocket-Protocol' if it has a value (according to spec)
+    if let protocolName = protocolName, !protocolName.isEmpty {
+      headers.webSocketProtocol = protocolName
+    }
+  }
+
+  // Returns a boolean indicating if the response is a websocket handshake.
+  var isWebSocketHandshake: Bool {
+    return status == .switchingProtocols && isWebSocketUpgrade &&
+      headers.webSocketAccept?.isEmpty == false
+  }
+}
diff --git a/Pods/Telegraph/Sources/Protocols/WebSockets/Models/WebSocket.swift b/Pods/Telegraph/Sources/Protocols/WebSockets/Models/WebSocket.swift
new file mode 100644
index 0000000..b95a12e
--- /dev/null
+++ b/Pods/Telegraph/Sources/Protocols/WebSockets/Models/WebSocket.swift
@@ -0,0 +1,31 @@
+//
+//  WebSocket.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 2/23/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+import Foundation
+
+public protocol WebSocket: class {
+  var localEndpoint: Endpoint? { get }
+  var remoteEndpoint: Endpoint? { get }
+
+  func close(immediately: Bool)
+  func send(data: Data)
+  func send(text: String)
+  func send(message: WebSocketMessage)
+}
+
+// MARK: Default implementation
+
+public extension WebSocket {
+  func send(data: Data) {
+    send(message: WebSocketMessage(data: data))
+  }
+
+  func send(text: String) {
+    send(message: WebSocketMessage(text: text))
+  }
+}
diff --git a/Pods/Telegraph/Sources/Protocols/WebSockets/Models/WebSocketConfig.swift b/Pods/Telegraph/Sources/Protocols/WebSockets/Models/WebSocketConfig.swift
new file mode 100644
index 0000000..1ed4725
--- /dev/null
+++ b/Pods/Telegraph/Sources/Protocols/WebSockets/Models/WebSocketConfig.swift
@@ -0,0 +1,34 @@
+//
+//  WebSocketConfig.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 2/21/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+import Foundation
+
+public struct WebSocketConfig {
+  /// The maximum time the connection will wait for incoming data.
+  public var readTimeout: TimeInterval = 300
+
+  /// The maximum time the connection will wait for writing header data.
+  public var writeHeaderTimeout: TimeInterval = 30
+
+  /// The maximum time the connection will wait for writing payload data.
+  public var writePayloadTimeout: TimeInterval = 300
+
+  /// Indicates if messages should be masked before sending (normally only applies to client messages on an unecrypted connection).
+  public var maskMessages = true
+
+  /// The interval that ping messages should be send (normally only the server should send ping messages).
+  public var pingInterval: TimeInterval = 0
+
+  /// The handler for websocket message errors.
+  public var errorHandler: WebSocketErrorHandler = WebSocketErrorDefaultHandler()
+
+  /// The handlers for websocket messages.
+  public var messageHandler: WebSocketMessageHandler = WebSocketMessageDefaultHandler()
+
+  public init() {}
+}
diff --git a/Pods/Telegraph/Sources/Protocols/WebSockets/Models/WebSocketConnection.swift b/Pods/Telegraph/Sources/Protocols/WebSockets/Models/WebSocketConnection.swift
new file mode 100644
index 0000000..78ac148
--- /dev/null
+++ b/Pods/Telegraph/Sources/Protocols/WebSockets/Models/WebSocketConnection.swift
@@ -0,0 +1,166 @@
+//
+//  WebSocketConnection.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 2/8/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+import Foundation
+
+// MARK: WebSocketConnectionDelegate
+
+public protocol WebSocketConnectionDelegate: class {
+  func connection(_ webSocketConnection: WebSocketConnection, didReceiveMessage message: WebSocketMessage)
+  func connection(_ webSocketConnection: WebSocketConnection, didSendMessage message: WebSocketMessage)
+  func connection(_ webSocketConnection: WebSocketConnection, didCloseWithError error: Error?)
+}
+
+// MARK: WebSocketConnection
+
+open class WebSocketConnection: TCPConnection, WebSocket {
+  public weak var delegate: WebSocketConnectionDelegate?
+
+  private let socket: TCPSocket
+  private let config: WebSocketConfig
+  private var parser: WebSocketParser
+  private var pingTimer: DispatchTimer?
+  private var closing = false
+
+  /// Initializes a new websocket connection.
+  public required init(socket: TCPSocket, config: WebSocketConfig) {
+    self.socket = socket
+    self.config = config
+    self.parser = WebSocketParser()
+    self.parser.delegate = self
+
+    // Define a ping timer if a ping interval is set
+    if config.pingInterval > 0 {
+      pingTimer = DispatchTimer(interval: config.pingInterval, queue: .global()) { [weak self] in
+        self?.send(message: WebSocketMessage(opcode: .ping))
+      }
+    }
+  }
+
+  /// Opens the connection.
+  public func open() {
+    open(data: nil)
+  }
+
+  /// Opens the connection with an existing chunk of data.
+  public func open(data: Data?) {
+    socket.delegate = self
+
+    // Start the ping timer
+    pingTimer?.start()
+
+    // Is the data relevant?
+    if let data = data, !data.isEmpty {
+      received(data: data)
+    } else {
+      socket.read(timeout: config.readTimeout)
+    }
+  }
+
+  /// Closes the connection.
+  public func close(immediately: Bool) {
+    // Normal close routine is to send a close message and wait for a close reply
+    if !immediately && !closing {
+      send(message: WebSocketMessage(closeCode: 1001))
+      return
+    }
+
+    // Stop the ping timer
+    pingTimer?.stop()
+
+    // Close the socket
+    socket.close(when: immediately ? .immediately : .afterWriting)
+  }
+
+  /// Sends a websocket message
+  public func send(message: WebSocketMessage) {
+    do {
+      // Is this a close handshake? Mark the connection as closing
+      if message.opcode == .connectionClose {
+        closing = true
+      }
+
+      // Pass the message through the handler
+      try config.messageHandler.outgoing(message: message, to: self)
+
+      // Send the message
+      message.maskBit = config.maskMessages
+      message.write(to: socket, headerTimeout: config.writeHeaderTimeout, payloadTimeout: config.writePayloadTimeout)
+
+      delegate?.connection(self, didSendMessage: message)
+    } catch {
+      config.errorHandler.outgoing(error: error, webSocket: self, message: message)
+    }
+  }
+
+  /// Handles incoming data on the socket.
+  private func received(data: Data) {
+    do {
+      try parser.parse(data: data)
+      socket.read(timeout: config.readTimeout)
+    } catch {
+      config.errorHandler.incoming(error: error, webSocket: self, message: nil)
+    }
+  }
+
+  /// Handles an incoming message.
+  private func received(message: WebSocketMessage) {
+    do {
+      // Reset the ping timer
+      pingTimer?.start()
+
+      // Inform the delegate of the incoming message
+      delegate?.connection(self, didReceiveMessage: message)
+
+      // Pass the message through the handler
+      try config.messageHandler.incoming(message: message, from: self)
+    } catch {
+      config.errorHandler.incoming(error: error, webSocket: self, message: message)
+    }
+  }
+}
+
+public extension WebSocketConnection {
+  /// The local endpoint information of the connection.
+  var localEndpoint: Endpoint? {
+    return socket.localEndpoint
+  }
+
+  /// The remote endpoint information of the connection.
+  var remoteEndpoint: Endpoint? {
+    return socket.remoteEndpoint
+  }
+}
+
+// MARK: TCPSocketConnectionDelegate implementation
+
+extension WebSocketConnection: TCPSocketDelegate {
+  /// Raised when the socket is connected (ignore, socket is already connected).
+  public func socketDidOpen(_ socket: TCPSocket) {}
+
+  /// Raised when the socket is disconnected.
+  public func socketDidClose(_ socket: TCPSocket, error: Error?) {
+    delegate?.connection(self, didCloseWithError: error)
+  }
+
+  /// Raised when the socket received data.
+  public func socketDidRead(_ socket: TCPSocket, data: Data, tag: Int) {
+    received(data: data)
+  }
+
+  /// Raised when the socket sent data (ignore).
+  public func socketDidWrite(_ socket: TCPSocket, tag: Int) {}
+}
+
+// MARK: WebSocketParserDelegate implementation
+
+extension WebSocketConnection: WebSocketParserDelegate {
+  public func parser(_ parser: WebSocketParser, didCompleteMessage message: WebSocketMessage) {
+    received(message: message)
+  }
+}
diff --git a/Pods/Telegraph/Sources/Protocols/WebSockets/Models/WebSocketError.swift b/Pods/Telegraph/Sources/Protocols/WebSockets/Models/WebSocketError.swift
new file mode 100644
index 0000000..0d91dfb
--- /dev/null
+++ b/Pods/Telegraph/Sources/Protocols/WebSockets/Models/WebSocketError.swift
@@ -0,0 +1,47 @@
+//
+//  WebSocketError.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 2/17/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+import Foundation
+
+public enum WebSocketError: Error {
+  case invalidMessage
+  case invalidOpcode
+  case invalidPayloadLength
+  case payloadIsNotText
+  case payloadTooLarge
+}
+
+public extension WebSocketError {
+  var code: UInt16 {
+    switch self {
+    case .invalidMessage: return 1002
+    case .invalidOpcode: return 1002
+    case .invalidPayloadLength: return 1002
+    case .payloadIsNotText: return 1007
+    case .payloadTooLarge: return 1009
+    }
+  }
+}
+
+extension WebSocketError: CustomStringConvertible {
+  public var description: String {
+    switch self {
+    case .invalidMessage: return "Invalid message"
+    case .invalidOpcode: return "Invalid opcode"
+    case .invalidPayloadLength: return "Invalid payload length"
+    case .payloadTooLarge: return "Payload is too large"
+    case .payloadIsNotText: return "Payload is not UTF8 string data"
+    }
+  }
+}
+
+extension WebSocketError: LocalizedError {
+  public var errorDescription: String? {
+    return description
+  }
+}
diff --git a/Pods/Telegraph/Sources/Protocols/WebSockets/Models/WebSocketMessage+Write.swift b/Pods/Telegraph/Sources/Protocols/WebSockets/Models/WebSocketMessage+Write.swift
new file mode 100644
index 0000000..991247a
--- /dev/null
+++ b/Pods/Telegraph/Sources/Protocols/WebSockets/Models/WebSocketMessage+Write.swift
@@ -0,0 +1,84 @@
+//
+//  WebSocket+Write.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 2/21/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+import Foundation
+
+public extension WebSocketMessage {
+  func write(to stream: WriteStream, headerTimeout: TimeInterval, payloadTimeout: TimeInterval) {
+    var header = Data()
+
+    // Gather information
+    var payloadData = payload.data
+    let payloadLength = payloadData?.count ?? 0
+    let hasPayload = payloadLength > 0
+
+    // Byte 1: FIN bit + Opcode
+    let firstByte = finBit ? WebSocketMasks.finBit : 0
+    header.append(firstByte | opcode.rawValue)
+
+    // Byte 2: Mask bit + Payload length
+    let secondByte = maskBit ? WebSocketMasks.maskBit : 0
+    switch payloadLength {
+
+    // Small payload: [L]
+    case 0..<126:
+      header.append(secondByte | UInt8(payloadLength))
+
+    // Medium payload: [126][L][L]
+    case 126...Int(UInt16.max):
+      let sizeBytes = UInt16(payloadLength).bytes
+      header.append(secondByte | 126)
+      header.append(sizeBytes[0])
+      header.append(sizeBytes[1])
+
+    // Large payload: [127][L][L][L][L][L][L][L][L]
+    default:
+      let sizeBytes = UInt64(payloadLength).bytes
+      header.append(secondByte | 127)
+      header.append(contentsOf: sizeBytes)
+    }
+
+    // Masking key
+    if maskBit {
+      let maskingKey = generateMask()
+      payloadData?.mask(with: maskingKey)
+      header.append(contentsOf: maskingKey)
+    }
+
+    // Write the header
+    stream.write(data: header, timeout: headerTimeout)
+
+    // Write the payload
+    if hasPayload, let payloadData = payloadData {
+      stream.write(data: payloadData, timeout: payloadTimeout)
+    }
+
+    stream.flush()
+  }
+}
+
+// MARK: WebSocketPayload data conversion
+
+public extension WebSocketPayload {
+  var data: Data? {
+    switch self {
+    case .binary(let data):
+      return data
+    case .text(let text):
+      return text.utf8Data
+    case .close(let code, let reason):
+      var result = Data()
+      result.append(code.bytes[0])
+      result.append(code.bytes[1])
+      result.append(reason.utf8Data)
+      return result
+    case .none:
+      return nil
+    }
+  }
+}
diff --git a/Pods/Telegraph/Sources/Protocols/WebSockets/Models/WebSocketMessage.swift b/Pods/Telegraph/Sources/Protocols/WebSockets/Models/WebSocketMessage.swift
new file mode 100644
index 0000000..84394a2
--- /dev/null
+++ b/Pods/Telegraph/Sources/Protocols/WebSockets/Models/WebSocketMessage.swift
@@ -0,0 +1,99 @@
+//
+//  WebSocketMessage.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 2/17/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+import Foundation
+
+open class WebSocketMessage {
+  public var finBit = true
+  public var maskBit = true
+  public var opcode: WebSocketOpcode
+  public var payload: WebSocketPayload
+
+  /// Creates a WebSocketMessage.
+  public init(opcode: WebSocketOpcode = .connectionClose, payload: WebSocketPayload = .none) {
+    self.opcode = opcode
+    self.payload = payload
+  }
+}
+
+public enum WebSocketOpcode: UInt8 {
+  case continuationFrame = 0x0
+  case textFrame = 0x1
+  case binaryFrame = 0x2
+  case connectionClose = 0x8
+  case ping = 0x9
+  case pong = 0xA
+}
+
+public enum WebSocketPayload {
+  case none
+  case binary(Data)
+  case text(String)
+  case close(code: UInt16, reason: String)
+}
+
+public struct WebSocketMasks {
+  static let finBit: UInt8 = 0b10000000
+  static let opcode: UInt8 = 0b00001111
+  static let maskBit: UInt8 = 0b10000000
+  static let payloadLength: UInt8 = 0b01111111
+}
+
+// MARK: Convenience initializers
+
+public extension WebSocketMessage {
+  /// Creates a WebSocketMessage that instructs to close the connection.
+  convenience init(closeCode: UInt16, reason: String = "") {
+    self.init(opcode: .connectionClose, payload: .close(code: closeCode, reason: reason))
+  }
+
+  /// Creates a WebSocketMessage that reports an error and closes the connection.
+  convenience init(error: WebSocketError) {
+    self.init(closeCode: error.code, reason: error.description)
+  }
+
+  /// Creates a WebSocketMessage with a binary payload.
+  convenience init(data: Data) {
+    self.init(opcode: .binaryFrame, payload: .binary(data))
+  }
+
+  /// Creates a WebSocketMessage with a text payload.
+  convenience init(text: String) {
+    self.init(opcode: .textFrame, payload: .text(text))
+  }
+}
+
+// MARK: Masking
+
+public extension WebSocketMessage {
+  func generateMask() -> [UInt8] {
+    return [UInt8.random, UInt8.random, UInt8.random, UInt8.random]
+  }
+}
+
+// MARK: CustomStringConvertible
+
+extension WebSocketMessage: CustomStringConvertible {
+  public var description: String {
+    let typeName = type(of: self)
+    var info = "<\(typeName): opcode: \(opcode), payload: "
+
+    switch payload {
+    case .binary(let data):
+      info += "\(data.count) bytes>"
+    case .text(let text):
+      info += "'\(text.truncate(count: 50, ellipses: true))'>"
+    case .close(let code, _):
+      info += "close \(code)>"
+    case .none:
+      info += "none>"
+    }
+
+    return info
+  }
+}
diff --git a/Pods/Telegraph/Sources/Protocols/WebSockets/Models/WebSocketParser.swift b/Pods/Telegraph/Sources/Protocols/WebSockets/Models/WebSocketParser.swift
new file mode 100644
index 0000000..929aef9
--- /dev/null
+++ b/Pods/Telegraph/Sources/Protocols/WebSockets/Models/WebSocketParser.swift
@@ -0,0 +1,216 @@
+//
+//  WebSocketParser.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 2/17/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+import Foundation
+
+//
+// Base Framing Protocol (https://tools.ietf.org/html/rfc6455 - 5.2)
+//
+// |0 1 2 3 4 5 6 7|0 1 2 3 4 5 6 7|0 1 2 3 4 5 6 7|0 1 2 3 4 5 6 7|
+// +-+-+-+-+-------+-+-------------+-------------------------------+
+// |F|R|R|R| opcode|M| Payload len |    Extended payload length    |
+// |I|S|S|S|  (4)  |A|     (7)     |             (16/64)           |
+// |N|V|V|V|       |S|             |   (if payload len==126/127)   |
+// | |1|2|3|       |K|             |                               |
+// +-+-+-+-+-------+-+-------------+ - - - - - - - - - - - - - - - +
+// |    Extended payload length continued if payload len == 127    |
+// + - - - - - - - - - - - - - - - +-------------------------------+
+// |                               | Masking-key, if MASK set to 1 |
+// +-------------------------------+-------------------------------+
+// |    Masking-key (continued)    |          Payload Data         |
+// +-------------------------------- - - - - - - - - - - - - - - - +
+// :                     Payload Data continued ...                :
+// + - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - +
+// |                     Payload Data continued ...                |
+// +---------------------------------------------------------------+
+//
+
+// swiftlint:disable function_body_length
+
+public protocol WebSocketParserDelegate: class {
+  func parser(_ parser: WebSocketParser, didCompleteMessage message: WebSocketMessage)
+}
+
+public class WebSocketParser {
+  public let maxPayloadLength: UInt64
+  public weak var delegate: WebSocketParserDelegate?
+  public private(set) lazy var message = WebSocketMessage()
+  public private(set) lazy var maskingKey = [UInt8](repeating: 0, count: 4)
+  public private(set) lazy var payload = Data()
+  public private(set) var nextPart = Part.finAndOpcode
+  public private(set) var bytesParsed = 0
+  public private(set) var payloadLength: UInt64 = 0
+
+  /// Describes the different parts to parse.
+  public enum Part {
+    case finAndOpcode
+    case maskAndPayloadLength
+    case extendedPayloadLength16(byteNo: Int)
+    case extendedPayloadLength64(byteNo: Int)
+    case maskingKey(byteNo: Int)
+    case payload
+    case endOfMessage
+  }
+
+  /// Initializes a websocket parser.
+  public init(maxPayloadLength: Int = 10_485_760) {
+    self.maxPayloadLength = UInt64(maxPayloadLength)
+  }
+
+  /// Parses the incoming data into a websocket message.
+  public func parse(data: Data) throws {
+    let stream = DataStream(data: data)
+
+    while let byte = stream.read() {
+      switch nextPart {
+
+      case .finAndOpcode:
+        // Extract and store the FIN bit
+        message.finBit = byte & WebSocketMasks.finBit != 0
+
+        // Extract and validate the opcode
+        guard let opcode = WebSocketOpcode(rawValue: byte & WebSocketMasks.opcode)
+        else { throw WebSocketError.invalidOpcode }
+
+        // Store the opcode
+        message.opcode = opcode
+        nextPart = .maskAndPayloadLength
+
+      case .maskAndPayloadLength:
+        // Extract the mask bit
+        message.maskBit = byte & WebSocketMasks.maskBit != 0
+
+        // Extract the payload length
+        payloadLength = UInt64(byte & WebSocketMasks.payloadLength)
+
+        switch payloadLength {
+        case 0: nextPart = message.maskBit ? .maskingKey(byteNo: 1) : .endOfMessage
+        case 1..<126: nextPart = message.maskBit ? .maskingKey(byteNo: 1) : .payload
+        case 126: nextPart = .extendedPayloadLength16(byteNo: 1)
+        case 127: nextPart = .extendedPayloadLength64(byteNo: 1)
+        default: throw WebSocketError.invalidPayloadLength
+        }
+
+      case .extendedPayloadLength16(let byteNo):
+        // Extract the extended payload length (2 bytes)
+        switch byteNo {
+        case 1:
+          payloadLength = UInt64(byte) << 8
+          nextPart = .extendedPayloadLength16(byteNo: 2)
+        case 2:
+          payloadLength += UInt64(byte)
+          nextPart = message.maskBit ? .maskingKey(byteNo: 1) : .payload
+        default: break
+        }
+
+      case .extendedPayloadLength64(let byteNo):
+        // Extract the extended payload length (8 bytes)
+        switch byteNo {
+        case 1:
+          payloadLength = UInt64(byte)
+          nextPart = .extendedPayloadLength64(byteNo: 2)
+        case 2..<8:
+          payloadLength = payloadLength << 8 + UInt64(byte)
+          nextPart = .extendedPayloadLength64(byteNo: byteNo + 1)
+        case 8:
+          payloadLength = payloadLength << 8 + UInt64(byte)
+          guard payloadLength <= maxPayloadLength else { throw WebSocketError.payloadTooLarge }
+          nextPart = message.maskBit ? .maskingKey(byteNo: 1) : .payload
+        default: break
+        }
+
+      case .maskingKey(let byteNo):
+        // Extract the masking key
+        switch byteNo {
+        case 1, 2, 3:
+          maskingKey[byteNo - 1] = byte
+          nextPart = .maskingKey(byteNo: byteNo + 1)
+        case 4:
+          maskingKey[3] = byte
+          nextPart = payloadLength > 0 ? .payload : .endOfMessage
+        default: break
+        }
+
+      case .payload:
+        // For now we can only support payloads that can fit into a Data object,
+        // if the payload is any bigger we should probably offload it to a temporary file
+        let payloadSafeLength = payloadLength > Int.max ? Int.max : Int(payloadLength)
+
+        // Is this the first payload byte?
+        if payload.isEmpty {
+          payload.reserveCapacity(payloadSafeLength)
+        }
+
+        // Append the byte we already read
+        payload.append(byte)
+
+        // Append any payload bytes available in the stream
+        let payloadBytesToRead = payloadSafeLength - payload.count
+        payload.append(stream.read(count: payloadBytesToRead))
+
+        // Is the payload complete?
+        if payload.count == payloadSafeLength {
+          nextPart = .endOfMessage
+        }
+
+      case .endOfMessage:
+        // This case should never be reached, because finishMessage resets
+        // the part that is being processed to the .finAndOpcode
+        break
+      }
+
+      // Are we done with the message?
+      if case .endOfMessage = nextPart {
+        try finishMessage()
+      }
+    }
+  }
+
+  /// Resets the parser.
+  public func reset() {
+    message = WebSocketMessage()
+    nextPart = .finAndOpcode
+    maskingKey = [UInt8](repeating: 0, count: 4)
+    payloadLength = 0
+    payload = Data()
+  }
+
+  /// Interprets the payload and calls the delegate to inform of the new message.
+  private func finishMessage() throws {
+    // Do we have to unmask the payload?
+    if message.maskBit {
+      payload.mask(with: maskingKey)
+    }
+
+    switch message.opcode {
+    case .binaryFrame, .continuationFrame:
+      // Binary payload
+      message.payload = .binary(payload)
+    case .textFrame:
+      // Text payload
+      guard let text = String(data: payload, encoding: .utf8) else { throw WebSocketError.payloadIsNotText }
+      message.payload = .text(text)
+    case .connectionClose:
+      // Close payload
+      let buffer = DataStream(data: payload)
+      let code = UInt16(buffer.read() ?? 0) << 8 | UInt16(buffer.read() ?? 0)
+      let reason = String(data: buffer.readToEnd(), encoding: .utf8) ?? ""
+      message.payload = .close(code: code, reason: reason)
+    case .ping, .pong:
+      // Ping / pong with optional payload
+      message.payload = payload.isEmpty ? .none : .binary(payload)
+    }
+
+    // Keep a reference to the message and reset
+    let completedMessage = message
+    reset()
+
+    // Inform the delegate
+    delegate?.parser(self, didCompleteMessage: completedMessage)
+  }
+}
diff --git a/Pods/Telegraph/Sources/Security/Certificate.swift b/Pods/Telegraph/Sources/Security/Certificate.swift
new file mode 100644
index 0000000..9cd6831
--- /dev/null
+++ b/Pods/Telegraph/Sources/Security/Certificate.swift
@@ -0,0 +1,52 @@
+//
+//  Certificate.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 1/26/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+import Foundation
+import Security
+
+open class Certificate: RawRepresentable {
+  public let rawValue: SecCertificate
+
+  public required init(rawValue: SecCertificate) {
+    self.rawValue = rawValue
+  }
+
+  public convenience init?(derData: Data) {
+    guard let rawValue = SecCertificateCreateWithData(kCFAllocatorDefault, derData as CFData) else { return nil }
+    self.init(rawValue: rawValue)
+  }
+
+  public convenience init?(derURL: URL) {
+    guard let data = try? Data(contentsOf: derURL) else { return nil }
+    self.init(derData: data)
+  }
+}
+
+// MARK: Certificate information
+
+public extension Certificate {
+  var commonName: String? {
+    return SecCertificateCopySubjectSummary(rawValue) as String?
+  }
+}
+
+// MARK: Keychain helpers
+
+public extension Certificate {
+  convenience init(fromKeychain label: String) throws {
+    self.init(rawValue: try KeychainManager.shared.find(kSecClassCertificate, label: label))
+  }
+
+  func addToKeychain(label: String) throws {
+    try KeychainManager.shared.add(value: rawValue, label: label)
+  }
+
+  static func removeFromKeychain(label: String) throws {
+    try KeychainManager.shared.remove(kSecClassCertificate, label: label)
+  }
+}
diff --git a/Pods/Telegraph/Sources/Security/CertificateIdentity.swift b/Pods/Telegraph/Sources/Security/CertificateIdentity.swift
new file mode 100644
index 0000000..fac173b
--- /dev/null
+++ b/Pods/Telegraph/Sources/Security/CertificateIdentity.swift
@@ -0,0 +1,64 @@
+//
+//  CertificateIdentity.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 1/26/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+import Foundation
+
+open class CertificateIdentity: RawRepresentable {
+  public let rawValue: SecIdentity
+
+  /// Initializes a new CertificateIdentity instance.
+  public required init(rawValue: SecIdentity) {
+    self.rawValue = rawValue
+  }
+
+  /// Creates a CertificateIdentity by importing PCKS12 data.
+  public convenience init?(p12Data: Data, passphrase: String) {
+    guard let rawValue = KeychainManager.shared.importPKCS12(data: p12Data, passphrase: passphrase) else { return nil }
+    self.init(rawValue: rawValue)
+  }
+
+  /// Creates a CertificateIdentity by importing PCKS12 data from the provided url.
+  public convenience init?(p12URL: URL, passphrase: String) {
+    guard let data = try? Data(contentsOf: p12URL) else { return nil }
+    self.init(p12Data: data, passphrase: passphrase)
+  }
+}
+
+// MARK: Keychain helpers
+
+public extension CertificateIdentity {
+  convenience init(fromKeychain label: String) throws {
+    self.init(rawValue: try KeychainManager.shared.find(kSecClassIdentity, label: label))
+  }
+
+  func addToKeychain(label: String) throws {
+    try KeychainManager.shared.add(value: rawValue, label: label)
+  }
+
+  static func removeFromKeychain(label: String) throws {
+    try KeychainManager.shared.remove(kSecClassIdentity, label: label)
+  }
+}
+
+// MARK: Optional passphrases (passphrases are required on MacOS)
+
+#if os(iOS) || os(watchOS) || os(tvOS)
+
+  public extension CertificateIdentity {
+    /// Creates a CertificateIdentity by importing PCKS12 data, without passphrase.
+    convenience init?(p12Data: Data) {
+      self.init(p12Data: p12Data, passphrase: "")
+    }
+
+    /// Creates a CertificateIdentity by importing PCKS12 data from the provided url, without passphrase.
+    convenience init?(p12URL: URL) {
+      self.init(p12URL: p12URL, passphrase: "")
+    }
+  }
+
+#endif
diff --git a/Pods/Telegraph/Sources/Security/KeychainError.swift b/Pods/Telegraph/Sources/Security/KeychainError.swift
new file mode 100644
index 0000000..063574b
--- /dev/null
+++ b/Pods/Telegraph/Sources/Security/KeychainError.swift
@@ -0,0 +1,48 @@
+//
+//  KeychainError.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 6/26/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+import Foundation
+
+public enum KeychainError: Error {
+  case invalidResult
+  case itemAlreadyExists
+  case itemNotFound
+  case other(code: OSStatus)
+
+  init(code: OSStatus) {
+    switch code {
+    case errSecDuplicateItem:
+      self = .itemAlreadyExists
+    case errSecItemNotFound:
+      self = .itemNotFound
+    default:
+      self = .other(code: code)
+    }
+  }
+}
+
+extension KeychainError: CustomStringConvertible {
+  public var description: String {
+    switch self {
+    case .invalidResult:
+      return "The keychain item returned wasn't of the expected type"
+    case .itemAlreadyExists:
+      return "The keychain item already exists"
+    case .itemNotFound:
+      return "The keychain item doesn't exist"
+    case .other(let code):
+      return "The keychain operation failed with code \(code)"
+    }
+  }
+}
+
+extension KeychainError: LocalizedError {
+  public var errorDescription: String? {
+    return description
+  }
+}
diff --git a/Pods/Telegraph/Sources/Security/KeychainManager.swift b/Pods/Telegraph/Sources/Security/KeychainManager.swift
new file mode 100644
index 0000000..1098262
--- /dev/null
+++ b/Pods/Telegraph/Sources/Security/KeychainManager.swift
@@ -0,0 +1,88 @@
+//
+//  KeychainManager.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 1/26/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+import Foundation
+import Security
+
+public class KeychainManager {
+  public static let shared = KeychainManager()
+  public var accessibility = kSecAttrAccessibleAfterFirstUnlockThisDeviceOnly
+
+  public typealias KeychainClass = CFString
+  public typealias KeychainValue = AnyObject
+  public typealias KeychainQuery = [NSString: AnyObject]
+}
+
+// MARK: PKCS12 methods
+
+public extension KeychainManager {
+  /// Imports the PKCS12 data into the keychain.
+  func importPKCS12(data: Data, passphrase: String, options: KeychainQuery = KeychainQuery()) -> SecIdentity? {
+    var query = options
+    query[kSecImportExportPassphrase] = passphrase as NSString
+
+    // Import the data
+    var importResult: CFArray?
+    let status = withUnsafeMutablePointer(to: &importResult) { SecPKCS12Import(data as NSData, query as CFDictionary, $0) }
+    guard status == errSecSuccess else { return nil }
+
+    // The result is an array of dictionaries, we are looking for the one that contains the identity
+    let importArray = importResult as? [[NSString: AnyObject]]
+    let importIdentity = importArray?.compactMap { dict in dict[kSecImportItemIdentity as NSString] }.first
+
+    // Let's double check that we have a result and that it is a SecIdentity
+    guard let rawResult = importIdentity, CFGetTypeID(rawResult) == SecIdentityGetTypeID() else { return nil }
+    let result = rawResult as! SecIdentity
+
+    return result
+  }
+}
+
+// MARK: Query methods
+
+public extension KeychainManager {
+  /// Adds a value to the keychain.
+  func add(value: KeychainValue, label: String, options: KeychainQuery = KeychainQuery()) throws {
+    // Don't specify kSecClass otherwise SecItemCopyMatching won't be able to find identities
+    var query = options
+    query[kSecAttrLabel] = label as NSString
+    query[kSecAttrAccessible] = accessibility
+    query[kSecValueRef] = value
+
+    var result: AnyObject?
+    let status = withUnsafeMutablePointer(to: &result) { SecItemAdd(query as CFDictionary, $0) }
+    guard status == errSecSuccess else { throw KeychainError(code: status) }
+  }
+
+  /// Finds an item in the keychain.
+  func find<T>(_ kClass: KeychainClass, label: String, options: KeychainQuery = KeychainQuery()) throws -> T {
+    var query = options
+    query[kSecClass] = kClass
+    query[kSecAttrLabel] = label as NSString
+    query[kSecReturnRef] = kCFBooleanTrue
+
+    var result: AnyObject?
+    let status = withUnsafeMutablePointer(to: &result) { SecItemCopyMatching(query as CFDictionary, $0) }
+
+    guard status == errSecSuccess || status == errSecItemNotFound else { throw KeychainError(code: status) }
+    guard let item = result else { throw KeychainError.itemNotFound }
+    guard let typedItem = item as? T else { throw KeychainError.invalidResult }
+
+    return typedItem
+  }
+
+  /// Removes an item from the keychain.
+  func remove(_ kClass: KeychainClass, label: String, options: KeychainQuery = KeychainQuery()) throws {
+    var query = options
+    query[kSecClass] = kClass
+    query[kSecAttrLabel] = label as NSString
+
+    let status = SecItemDelete(query as CFDictionary)
+    guard status == errSecSuccess else { throw KeychainError(code: status) }
+  }
+}
diff --git a/Pods/Telegraph/Sources/Security/SHA1.swift b/Pods/Telegraph/Sources/Security/SHA1.swift
new file mode 100644
index 0000000..8ddcea8
--- /dev/null
+++ b/Pods/Telegraph/Sources/Security/SHA1.swift
@@ -0,0 +1,35 @@
+//
+//  SHA1.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 2/13/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+import Foundation
+import CommonCrypto
+
+public struct SHA1 {
+  /// The message digest.
+  public let digest: Data
+
+  /// Creates a SHA1 digest of the provided data.
+  public init(data: Data) {
+    var buffer = [UInt8](repeating: 0, count: Int(CC_SHA1_DIGEST_LENGTH))
+    data.withUnsafeBytes { _ = CC_SHA1($0.baseAddress, CC_LONG(data.count), &buffer) }
+
+    self.digest = Data(buffer)
+  }
+}
+
+public extension SHA1 {
+  /// Hashes the provided data using the SHA1 algorithm and returns the digest.
+  static func hash(_ data: Data) -> Data {
+    return SHA1(data: data).digest
+  }
+
+  /// Hashes the provided string using the SHA1 algorithm and returns the digest.
+  static func hash(_ string: String) -> Data {
+    return SHA1(data: string.utf8Data).digest
+  }
+}
diff --git a/Pods/Telegraph/Sources/Security/TLSConfig.swift b/Pods/Telegraph/Sources/Security/TLSConfig.swift
new file mode 100644
index 0000000..e1fb034
--- /dev/null
+++ b/Pods/Telegraph/Sources/Security/TLSConfig.swift
@@ -0,0 +1,52 @@
+//
+//  TLSConfig.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 2/7/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+import Foundation
+
+public struct TLSConfig {
+  public let identity: CertificateIdentity?
+  public let certificates: [Certificate]
+
+  public init(serverIdentity: CertificateIdentity, caCertificates: [Certificate]) {
+    self.identity = serverIdentity
+    self.certificates = caCertificates
+  }
+
+  public init(clientCertificates: [Certificate] = []) {
+    self.identity = nil
+    self.certificates = clientCertificates
+  }
+}
+
+// MARK: CFNetwork raw config
+
+extension TLSConfig {
+  internal var rawConfig: [String: NSObject] {
+    var rawConfig = [String: NSObject]()
+    var isServerSide = false
+
+    // Convert the certificates
+    var allCertificates = certificates.map { $0.rawValue as AnyObject }
+
+    // If an identity is set, insert it as the first one
+    if let identity = identity {
+      allCertificates.insert(identity.rawValue, at: 0)
+      isServerSide = true
+    }
+
+    // Set the certificate
+    if !allCertificates.isEmpty {
+      rawConfig[kCFStreamSSLCertificates as String] = allCertificates as CFArray
+    }
+
+    // Inform TLS if we are server or client side
+    rawConfig[kCFStreamSSLIsServer as String] = isServerSide as CFBoolean
+
+    return rawConfig
+  }
+}
diff --git a/Pods/Telegraph/Sources/Security/TLSPolicy.swift b/Pods/Telegraph/Sources/Security/TLSPolicy.swift
new file mode 100644
index 0000000..4dc29c9
--- /dev/null
+++ b/Pods/Telegraph/Sources/Security/TLSPolicy.swift
@@ -0,0 +1,50 @@
+//
+//  TLSPolicy.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 1/30/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+import Foundation
+
+open class TLSPolicy {
+  public var commonName: String?
+  public var certificates: [Certificate]
+
+  /// Creates a policy that can check the common name and certificate chain.
+  public init(commonName: String? = nil, certificates: [Certificate] = []) {
+    self.commonName = commonName
+    self.certificates = certificates
+  }
+
+  /// Evaluates the trust, returns a boolean indicating that it can be trusted or not.
+  public func evaluate(trust: SecTrust) -> Bool {
+    // Perform common name checks?
+    if let commonName = commonName {
+      let hostPolicy = SecPolicyCreateSSL(true, commonName.isEmpty ? nil : commonName as CFString)
+      SecTrustSetPolicies(trust, hostPolicy)
+    }
+
+    // Perform certificate check?
+    if !certificates.isEmpty {
+      SecTrustSetAnchorCertificates(trust, certificates.map { $0.rawValue } as CFArray)
+    }
+
+    // Evaluate the trust
+    var result: SecTrustResultType = .invalid
+    SecTrustEvaluate(trust, &result)
+
+    return result == .unspecified || result == .proceed
+  }
+}
+
+// MARK: URLSession helper
+
+public extension TLSPolicy {
+  /// Evaluates the trust, returns a credential if it can be trusted or nil if not.
+  func evaluateSession(trust: SecTrust?) -> URLCredential? {
+    guard let trust = trust, evaluate(trust: trust) else { return nil }
+    return URLCredential(trust: trust)
+  }
+}
diff --git a/Pods/Telegraph/Sources/Server/Server+Config.swift b/Pods/Telegraph/Sources/Server/Server+Config.swift
new file mode 100644
index 0000000..b7c6820
--- /dev/null
+++ b/Pods/Telegraph/Sources/Server/Server+Config.swift
@@ -0,0 +1,24 @@
+//
+//  Server+Config.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 2/23/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+import Foundation
+
+public extension HTTPConfig {
+  static var serverDefault: HTTPConfig {
+    return HTTPConfig(requestHandlers: [HTTPWebSocketHandler(), HTTPRouteHandler()])
+  }
+}
+
+public extension WebSocketConfig {
+  static var serverDefault: WebSocketConfig {
+    var config = WebSocketConfig()
+    config.maskMessages = false
+    config.pingInterval = 60
+    return config
+  }
+}
diff --git a/Pods/Telegraph/Sources/Server/Server.swift b/Pods/Telegraph/Sources/Server/Server.swift
new file mode 100644
index 0000000..ce79407
--- /dev/null
+++ b/Pods/Telegraph/Sources/Server/Server.swift
@@ -0,0 +1,254 @@
+//
+//  Server.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 1/20/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+import Foundation
+
+open class Server {
+  public weak var delegate: ServerDelegate?
+  public var delegateQueue = DispatchQueue(label: "Telegraph.Server.delegate")
+
+  public var httpConfig = HTTPConfig.serverDefault
+  public var webSocketConfig = WebSocketConfig.serverDefault
+  public weak var webSocketDelegate: ServerWebSocketDelegate?
+
+  private var listener: TCPListener?
+  private var tlsConfig: TLSConfig?
+  private var httpConnections = SynchronizedSet<HTTPConnection>()
+  private var webSocketConnections = SynchronizedSet<WebSocketConnection>()
+
+  private let listenerQueue = DispatchQueue(label: "Telegraph.Server.listener")
+  private let connectionsQueue = DispatchQueue(label: "Telegraph.Server.connections")
+  private let workerQueue = OperationQueue()
+
+  /// Initializes a unsecure Server instance.
+  public init() {}
+
+  /// Initializes a secure Server instance.
+  public init(identity: CertificateIdentity, caCertificates: [Certificate]) {
+    tlsConfig = TLSConfig(serverIdentity: identity, caCertificates: caCertificates)
+  }
+
+  /// Starts the server on the specified port or 0 for automatic port assignment.
+  open func start(port: Endpoint.Port = 0, interface: String? = nil) throws {
+    listener = TCPListener(port: port, interface: interface, tlsConfig: tlsConfig)
+    listener!.delegate = self
+
+    try listener!.start(queue: listenerQueue)
+  }
+
+  /// Stops the server, optionally we wait for requests to finish.
+  open func stop(immediately: Bool = false) {
+    listener?.stop()
+
+    // Close the connections
+    httpConnections.forEach { $0.close(immediately: immediately) }
+    webSocketConnections.forEach { $0.close(immediately: immediately) }
+  }
+
+  /// Handles an incoming socket. The Server normally wraps the socket into a HTTP connection and starts parsing requests.
+  open func handleIncoming(socket: TCPSocket) {
+    // Configure the socket
+    socket.setDelegateQueue(connectionsQueue)
+
+    // Wrap the socket in a HTTP connection
+    let httpConnection = HTTPConnection(socket: socket, config: httpConfig)
+    httpConnections.insert(httpConnection)
+
+    // Open the HTTP connection
+    httpConnection.delegate = self
+    httpConnection.open()
+  }
+
+  /// Handles an incoming request from the HTTP connection. The Server normally offloads the request to a worker queue to allow concurrent requests.
+  open func handleIncoming(request: HTTPRequest, connection: HTTPConnection, error: Error?) {
+    workerQueue.addOperation { [weak self, weak connection] in
+      guard let self = self, let connection = connection else { return }
+
+      // Get a response for the request
+      let response = self.responseFor(request: request, error: error)
+
+      // Send the response or close the connection
+      self.connectionsQueue.async {
+        if let response = response {
+          connection.send(response: response, toRequest: request)
+        } else {
+          connection.close(immediately: true)
+        }
+      }
+    }
+  }
+
+  /// Handles the upgrade of an HTTP request. The Server normally supports the upgrade of an HTTP connection to a WebSocket connection.
+  open func handleUpgrade(request: HTTPRequest, connection: HTTPConnection) {
+    // We can only handle the WebSocket protocol
+    guard request.isWebSocketUpgrade else {
+      connection.close(immediately: true)
+      return
+    }
+
+    // Remove the http connection
+    httpConnections.remove(connection)
+
+    // Extract the socket and any WebSocket data already read
+    let (socket, webSocketData) = connection.upgrade()
+
+    // Add the websocket connection
+    let webSocketConnection = WebSocketConnection(socket: socket, config: webSocketConfig)
+    webSocketConnections.insert(webSocketConnection)
+
+    // Open the websocket connection
+    webSocketConnection.delegate = self
+    webSocketConnection.open(data: webSocketData)
+
+    // Call the delegate
+    delegateQueue.async { [weak self] in
+      guard let self = self else { return }
+      self.webSocketDelegate?.server(self, webSocketDidConnect: webSocketConnection, handshake: request)
+    }
+  }
+
+  /// Creates a reponse to an HTTP request. If an error occurs, it will call respondTo(error:).
+  open func responseFor(request: HTTPRequest) throws -> HTTPResponse? {
+    // Put the request through the chain of handlers
+    let response = try httpConfig.requestChain(request)
+
+    // Check that a possible connection upgrade was handled properly
+    if let response = response, response.status != .switchingProtocols, request.isConnectionUpgrade {
+      throw HTTPError.protocolNotSupported
+    }
+
+    return response
+  }
+
+  /// Creates a response to an error that occured while processing an HTTP request.
+  open func responseFor(error: Error) -> HTTPResponse? {
+    return httpConfig.errorHandler.respond(to: error)
+  }
+
+  /// Called by the worker queue to create a response to an HTTP request or possible errors.
+  private func responseFor(request: HTTPRequest, error: Error?) -> HTTPResponse? {
+    do {
+      if let error = error { throw error }
+      return try responseFor(request: request)
+    } catch {
+      return responseFor(error: error)
+    }
+  }
+}
+
+// MARK: Server properties
+
+public extension Server {
+  /// The number of concurrent requests that can be handled.
+  var concurrency: Int {
+    get { return workerQueue.maxConcurrentOperationCount }
+    set { workerQueue.maxConcurrentOperationCount = newValue }
+  }
+
+  /// The port on which the listener is accepting connections.
+  var port: Endpoint.Port {
+    return listener?.port ?? 0
+  }
+
+  /// Indicates if the server is running.
+  var isRunning: Bool {
+    return listener?.isListening ?? false
+  }
+
+  /// Indicates if the server is secure (HTTPS).
+  var isSecure: Bool {
+    return tlsConfig != nil
+  }
+
+  /// The number of active HTTP connections.
+  var httpConnectionCount: Int {
+    return httpConnections.count
+  }
+
+  /// The number of active WebSocket connections.
+  var webSocketCount: Int {
+    return webSocketConnections.count
+  }
+
+  /// The WebSockets currently connected to this server.
+  var webSockets: [WebSocket] {
+    return webSocketConnections.toArray()
+  }
+}
+
+// MARK: TCPListenerDelegate implementation
+
+extension Server: TCPListenerDelegate {
+  /// Raised when the server's listener accepts an incoming socket connection.
+  public func listener(_ listener: TCPListener, didAcceptSocket socket: TCPSocket) {
+    handleIncoming(socket: socket)
+  }
+
+  /// Raised when the server's listener disconnected.
+  public func listenerDisconnected(_ listener: TCPListener, error: Error?) {
+    delegateQueue.async { [weak self] in
+      guard let self = self else { return }
+      self.delegate?.serverDidStop(self, error: error)
+      self.webSocketDelegate?.serverDidDisconnect(self)
+    }
+  }
+}
+
+// MARK: HTTPConnectionDelegate implementation
+
+extension Server: HTTPConnectionDelegate {
+  /// Raised when an HTTP connection receives a request.
+  public func connection(_ httpConnection: HTTPConnection, handleIncomingRequest request: HTTPRequest, error: Error?) {
+    handleIncoming(request: request, connection: httpConnection, error: error)
+  }
+
+  /// Raised when an HTTP connection receives a response.
+  public func connection(_ httpConnection: HTTPConnection, handleIncomingResponse response: HTTPResponse, error: Error?) {
+    httpConnection.close(immediately: true)
+  }
+
+  /// Raised when an HTTP connection requests a connection upgrade.
+  public func connection(_ httpConnection: HTTPConnection, handleUpgradeByRequest request: HTTPRequest) {
+    handleUpgrade(request: request, connection: httpConnection)
+  }
+
+  /// Raised when an HTTP connection is closed, optionally with an error.
+  public func connection(_ httpConnection: HTTPConnection, didCloseWithError error: Error?) {
+    httpConnections.remove(httpConnection)
+  }
+}
+
+// MARK: WebSocketConnectionDelegate implementation
+
+extension Server: WebSocketConnectionDelegate {
+  /// Raised when a WebSocket connection receives a message.
+  public func connection(_ webSocketConnection: WebSocketConnection, didReceiveMessage message: WebSocketMessage) {
+    delegateQueue.async { [weak self] in
+      guard let self = self else { return }
+      self.webSocketDelegate?.server(self, webSocket: webSocketConnection, didReceiveMessage: message)
+    }
+  }
+
+  /// Raised when a WebSocket connection sends a message.
+  public func connection(_ webSocketConnection: WebSocketConnection, didSendMessage message: WebSocketMessage) {
+    delegateQueue.async { [weak self] in
+      guard let self = self else { return }
+      self.webSocketDelegate?.server(self, webSocket: webSocketConnection, didSendMessage: message)
+    }
+  }
+
+  /// Raised when a WebSocket connection is closed, optionally with an error.
+  public func connection(_ webSocketConnection: WebSocketConnection, didCloseWithError error: Error?) {
+    webSocketConnections.remove(webSocketConnection)
+
+    delegateQueue.async { [weak self] in
+      guard let self = self else { return }
+      self.webSocketDelegate?.server(self, webSocketDidDisconnect: webSocketConnection, error: error)
+    }
+  }
+}
diff --git a/Pods/Telegraph/Sources/Server/ServerDelegates.swift b/Pods/Telegraph/Sources/Server/ServerDelegates.swift
new file mode 100644
index 0000000..729de4b
--- /dev/null
+++ b/Pods/Telegraph/Sources/Server/ServerDelegates.swift
@@ -0,0 +1,38 @@
+//
+//  ServerDelegates.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 4/5/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+import Foundation
+
+public protocol ServerDelegate: class {
+  /// Called when the server has stopped
+  func serverDidStop(_ server: Server, error: Error?)
+}
+
+public protocol ServerWebSocketDelegate: class {
+  /// Called when a web socket connected
+  func server(_ server: Server, webSocketDidConnect webSocket: WebSocket, handshake: HTTPRequest)
+
+  /// Called when a web socket disconnected
+  func server(_ server: Server, webSocketDidDisconnect webSocket: WebSocket, error: Error?)
+
+  /// Called when a message was received from a web socket
+  func server(_ server: Server, webSocket: WebSocket, didReceiveMessage message: WebSocketMessage)
+
+  /// Called when a message was sent to a web socket
+  func server(_ server: Server, webSocket: WebSocket, didSendMessage message: WebSocketMessage)
+
+  /// Deprecated: use ServerDelegate - serverDidStop
+  func serverDidDisconnect(_ server: Server)
+}
+
+// MARK: Default implementation
+
+public extension ServerWebSocketDelegate {
+  func server(_ server: Server, webSocket: WebSocket, didSendMessage message: WebSocketMessage) {}
+  func serverDidDisconnect(_ server: Server) {}
+}
diff --git a/Pods/Telegraph/Sources/Transport/DataStream.swift b/Pods/Telegraph/Sources/Transport/DataStream.swift
new file mode 100644
index 0000000..ab39879
--- /dev/null
+++ b/Pods/Telegraph/Sources/Transport/DataStream.swift
@@ -0,0 +1,48 @@
+//
+//  DataStream.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 7/24/18.
+//  Copyright © 2018 Building42. All rights reserved.
+//
+
+import Foundation
+
+public final class DataStream {
+  private let data: Data
+  public private (set) var position: Int
+
+  /// Initializes a new DataStream.
+  public init(data: Data = Data()) {
+    self.data = data
+    self.position = 0
+  }
+
+  /// Returns if there are more bytes to read.
+  public var hasBytesAvailable: Bool {
+    return position < data.count
+  }
+
+  /// Returns the next byte.
+  public func read() -> UInt8? {
+    guard position < data.count else { return nil }
+
+    defer { position += 1 }
+    return data[position]
+  }
+
+  /// Returns the next chunk of the data. Note: the data is copied.
+  public func read(count: Int) -> Data {
+    guard position < data.count else { return Data() }
+
+    let endPosition = min(position + count, data.count)
+
+    defer { position = endPosition }
+    return data.subdata(in: position..<endPosition)
+  }
+
+  /// Returns the remaining chunk of data. Note: the data is copied.
+  public func readToEnd() -> Data {
+    return read(count: data.count)
+  }
+}
diff --git a/Pods/Telegraph/Sources/Transport/Endpoint.swift b/Pods/Telegraph/Sources/Transport/Endpoint.swift
new file mode 100644
index 0000000..b5621aa
--- /dev/null
+++ b/Pods/Telegraph/Sources/Transport/Endpoint.swift
@@ -0,0 +1,37 @@
+//
+//  Endpoint.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 9/16/18.
+//  Copyright © 2018 Building42. All rights reserved.
+//
+
+public struct Endpoint: Hashable {
+  public typealias Host = String
+  public typealias Port = Int
+
+  public var host: Host
+  public var port: Port
+
+  /// Creates an Endpoint based on a host and port.
+  public init(host: Host, port: Port) {
+    self.host = host
+    self.port = port
+  }
+}
+
+public extension Endpoint {
+  /// Creates an Endpoint based on an URL.
+  init?(url: URL) {
+    guard let host = url.host else { return nil }
+    let port = url.port ?? url.portBasedOnScheme
+
+    self.init(host: host, port: port)
+  }
+
+  /// Creates an Endpoint based on a host and unsigned port.
+  init(host: Host, port: UInt16) {
+    self.host = host
+    self.port = Int(port)
+  }
+}
diff --git a/Pods/Telegraph/Sources/Transport/Streams.swift b/Pods/Telegraph/Sources/Transport/Streams.swift
new file mode 100644
index 0000000..ae822b0
--- /dev/null
+++ b/Pods/Telegraph/Sources/Transport/Streams.swift
@@ -0,0 +1,18 @@
+//
+//  Stream.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 2/2/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+import Foundation
+
+public protocol ReadStream {
+  func read(timeout: TimeInterval)
+}
+
+public protocol WriteStream {
+  func flush()
+  func write(data: Data, timeout: TimeInterval)
+}
diff --git a/Pods/Telegraph/Sources/Transport/TCPConnection.swift b/Pods/Telegraph/Sources/Transport/TCPConnection.swift
new file mode 100644
index 0000000..a363e98
--- /dev/null
+++ b/Pods/Telegraph/Sources/Transport/TCPConnection.swift
@@ -0,0 +1,29 @@
+//
+//  TCPConnection.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 2/10/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+import Foundation
+
+public protocol TCPConnection: class, Hashable {
+  var localEndpoint: Endpoint? { get }
+  var remoteEndpoint: Endpoint? { get }
+
+  func open()
+  func close(immediately: Bool)
+}
+
+// MARK: Hashable implementation
+
+public extension TCPConnection {
+  static func == (lhs: Self, rhs: Self) -> Bool {
+    return ObjectIdentifier(lhs) == ObjectIdentifier(rhs)
+  }
+
+  func hash(into hasher: inout Hasher) {
+    ObjectIdentifier(self).hash(into: &hasher)
+  }
+}
diff --git a/Pods/Telegraph/Sources/Transport/TCPListener.swift b/Pods/Telegraph/Sources/Transport/TCPListener.swift
new file mode 100644
index 0000000..df81253
--- /dev/null
+++ b/Pods/Telegraph/Sources/Transport/TCPListener.swift
@@ -0,0 +1,90 @@
+//
+//  TCPListener.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 2/17/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+import Foundation
+import CocoaAsyncSocket
+
+public protocol TCPListenerDelegate: class {
+  /// Called when the listener accepts a new incoming socket
+  func listener(_ listener: TCPListener, didAcceptSocket socket: TCPSocket)
+
+  /// Called when the listener socket has disconnected
+  func listenerDisconnected(_ listener: TCPListener, error: Error?)
+}
+
+public final class TCPListener: NSObject {
+  /// The delegate to handle listener events.
+  public weak var delegate: TCPListenerDelegate?
+
+  /// The interface the listener listens on.
+  public let interface: String?
+
+  /// The TLS configuration for secure connections.
+  public let tlsConfig: TLSConfig?
+
+  private let listenerPort: UInt16
+  private var listenerSocket: GCDAsyncSocket
+
+  /// Creates a listener that listens on the provided port and interface.
+  public init(port: Endpoint.Port, interface: String? = nil, tlsConfig: TLSConfig? = nil) {
+    self.listenerPort = UInt16(port)
+    self.listenerSocket = GCDAsyncSocket()
+    self.interface = interface
+    self.tlsConfig = tlsConfig
+
+    super.init()
+  }
+
+  /// Indicates if the listener is active.
+  public var isListening: Bool {
+    return listenerSocket.localPort > 0
+  }
+
+  /// The port the listener listens on.
+  public var port: Endpoint.Port {
+    let port = isListening ? listenerSocket.localPort : listenerPort
+    return Endpoint.Port(port)
+  }
+
+  /// The queue for delegate calls.
+  public var queue: DispatchQueue? {
+    return listenerSocket.delegateQueue
+  }
+
+  /// Starts the listener with a queue to perform the delegate calls on.
+  public func start(queue: DispatchQueue) throws {
+    listenerSocket.setDelegate(self, delegateQueue: queue)
+    try listenerSocket.accept(onPort: listenerPort)
+  }
+
+  /// Stops the listener.
+  public func stop() {
+    listenerSocket.disconnect()
+  }
+}
+
+// MARK: GCDAsyncSocketDelegate implementation
+
+extension TCPListener: GCDAsyncSocketDelegate {
+  /// Raised when the socket accepts a new incoming client socket.
+  public func socket(_ sock: GCDAsyncSocket, didAcceptNewSocket newSocket: GCDAsyncSocket) {
+    let socket = TCPSocket(wrapping: newSocket)
+
+    // Is this a secure connection?
+    if let tlsConfig = tlsConfig {
+      socket.startTLS(config: tlsConfig)
+    }
+
+    delegate?.listener(self, didAcceptSocket: socket)
+  }
+
+  /// Raised when the socket disconnects.
+  public func socketDidDisconnect(_ sock: GCDAsyncSocket, withError err: Error?) {
+    delegate?.listenerDisconnected(self, error: err)
+  }
+}
diff --git a/Pods/Telegraph/Sources/Transport/TCPSocket.swift b/Pods/Telegraph/Sources/Transport/TCPSocket.swift
new file mode 100644
index 0000000..13f3f2e
--- /dev/null
+++ b/Pods/Telegraph/Sources/Transport/TCPSocket.swift
@@ -0,0 +1,187 @@
+//
+//  TCPSocket.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 2/2/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+import Foundation
+import CocoaAsyncSocket
+
+// MARK: TCPSocketClose
+
+public enum TCPSocketClose {
+  case immediately
+  case afterReading
+  case afterWriting
+  case afterReadingAndWriting
+}
+
+// MARK: TCPSocketDelegate
+
+public protocol TCPSocketDelegate: class {
+  func socketDidOpen(_ socket: TCPSocket)
+  func socketDidClose(_ socket: TCPSocket, error: Error?)
+  func socketDidRead(_ socket: TCPSocket, data: Data, tag: Int)
+  func socketDidWrite(_ socket: TCPSocket, tag: Int)
+}
+
+// MARK: TCPSocket
+
+public final class TCPSocket: NSObject {
+  /// The endpoint to connect to.
+  public let endpoint: Endpoint
+
+  /// The delegate to handle socket events.
+  public weak var delegate: TCPSocketDelegate?
+
+  private let socket: GCDAsyncSocket
+  private let tlsPolicy: TLSPolicy?
+
+  /// Creates a socket to connect to an endpoint.
+  public init(endpoint: Endpoint, tlsPolicy: TLSPolicy? = nil) {
+    self.endpoint = endpoint
+    self.tlsPolicy = tlsPolicy
+    self.socket = GCDAsyncSocket()
+
+    defer { socket.delegate = self }
+    super.init()
+  }
+
+  /// Creates a socket by wrapping an existing GCDAsyncSocket.
+  internal init(wrapping socket: GCDAsyncSocket) {
+    self.endpoint = Endpoint(host: socket.localHost ?? "", port: socket.localPort)
+    self.tlsPolicy = nil
+    self.socket = socket
+
+    defer { socket.delegate = self }
+    super.init()
+  }
+
+  /// Indicates if the socket is connected.
+  public var isConnected: Bool {
+    return socket.isConnected
+  }
+
+  /// The local endpoint information, only available when connected.
+  public var localEndpoint: Endpoint? {
+    guard let host = socket.localHost else { return nil }
+    return Endpoint(host: host, port: socket.localPort)
+  }
+
+  /// The remote endpoint information, only available when connected.
+  public var remoteEndpoint: Endpoint? {
+    guard let host = socket.connectedHost else { return nil }
+    return Endpoint(host: host, port: socket.connectedPort)
+  }
+
+  /// The queue for delegate calls.
+  public var queue: DispatchQueue? {
+    return socket.delegateQueue
+  }
+
+  /// Sets the delegate that will receive delegate calls on the provided queue.
+  public func setDelegate(_ delegate: TCPSocketDelegate, queue: DispatchQueue) {
+    self.delegate = delegate
+    socket.setDelegate(self, delegateQueue: queue)
+  }
+
+  /// Sets the queue to perform the delegate calls on.
+  public func setDelegateQueue(_ queue: DispatchQueue) {
+    socket.setDelegate(self, delegateQueue: queue)
+  }
+
+  /// Opens the connection, calls the delegate if it succeeds / fails.
+  public func connect(timeout: TimeInterval = 30) {
+    do {
+      try socket.connect(toHost: endpoint.host, onPort: UInt16(endpoint.port), withTimeout: timeout)
+    } catch {
+      delegate?.socketDidClose(self, error: error)
+    }
+  }
+
+  /// Closes the connection.
+  public func close(when: TCPSocketClose = .immediately) {
+    switch when {
+    case .immediately: socket.disconnect()
+    case .afterReading: socket.disconnectAfterReading()
+    case .afterWriting: socket.disconnectAfterWriting()
+    case .afterReadingAndWriting: socket.disconnectAfterReadingAndWriting()
+    }
+  }
+
+  /// Reads data with a timeout and tag.
+  public func read(timeout: TimeInterval = -1, tag: Int = 0) {
+    socket.readData(withTimeout: timeout, tag: tag)
+  }
+
+  /// Reads data with a max length, timeout and tag.
+  public func read(maxLength: Int, timeout: TimeInterval = -1, tag: Int = 0) {
+    socket.readData(toLength: UInt(maxLength), withTimeout: timeout, tag: tag)
+  }
+
+  /// Writes data with a timeout and tag.
+  public func write(data: Data, timeout: TimeInterval = -1, tag: Int = 0) {
+    socket.write(data, withTimeout: timeout, tag: tag)
+  }
+
+  /// Starts the TLS handshake for secure connections.
+  public func startTLS(config: TLSConfig = TLSConfig()) {
+    var rawConfig = config.rawConfig
+
+    // When a TLS policy is set, enable manual trust evaluation
+    if tlsPolicy != nil {
+      rawConfig[GCDAsyncSocketManuallyEvaluateTrust] = true as CFBoolean
+    }
+
+    socket.startTLS(rawConfig)
+  }
+}
+
+/// ReadStream and WriteStream implementation
+
+extension TCPSocket: ReadStream, WriteStream {
+  /// Reads data with a timeout and tag.
+  public func read(timeout: TimeInterval) {
+    read(timeout: timeout, tag: 0)
+  }
+
+  /// Writes data with a timeout and tag.
+  public func write(data: Data, timeout: TimeInterval) {
+    write(data: data, timeout: timeout, tag: 0)
+  }
+
+  /// Flushes any open writes.
+  public func flush() {}
+}
+
+// MARK: GCDAsyncSocketDelegate implementation
+
+extension TCPSocket: GCDAsyncSocketDelegate {
+  /// Raised when the socket has connected to the host.
+  public func socket(_ sock: GCDAsyncSocket, didConnectToHost host: String, port: UInt16) {
+    delegate?.socketDidOpen(self)
+  }
+
+  /// Raised when the socket has disconnected from the host.
+  public func socketDidDisconnect(_ sock: GCDAsyncSocket, withError err: Error?) {
+    delegate?.socketDidClose(self, error: err)
+  }
+
+  /// Raised when the socket is done reading data.
+  public func socket(_ sock: GCDAsyncSocket, didRead data: Data, withTag tag: Int) {
+    delegate?.socketDidRead(self, data: data, tag: tag)
+  }
+
+  /// Raised when the socket is done writing data.
+  public func socket(_ sock: GCDAsyncSocket, didWriteDataWithTag tag: Int) {
+    delegate?.socketDidWrite(self, tag: tag)
+  }
+
+  /// Raised when the socket is asking to evaluate the trust as part of the TLS handshake.
+  public func socket(_ sock: GCDAsyncSocket, didReceive trust: SecTrust, completionHandler: @escaping (Bool) -> Void) {
+    let trusted = tlsPolicy?.evaluate(trust: trust) ?? false
+    completionHandler(trusted)
+  }
+}
diff --git a/Pods/Telegraph/Sources/Transport/URI.swift b/Pods/Telegraph/Sources/Transport/URI.swift
new file mode 100644
index 0000000..2f2ae20
--- /dev/null
+++ b/Pods/Telegraph/Sources/Transport/URI.swift
@@ -0,0 +1,83 @@
+//
+//  URI.swift
+//  Telegraph
+//
+//  Created by Yvo van Beek on 2/5/17.
+//  Copyright © 2017 Building42. All rights reserved.
+//
+
+import Foundation
+
+public struct URI {
+  private var components: URLComponents
+
+  /// Creates a URI from the provided path, query string.
+  public init(path: String = "/", query: String? = nil) {
+    self.components = URLComponents()
+    self.path = path
+    self.query = query
+  }
+
+  /// Creates a URI from URLComponents. Takes only the path, query string.
+  public init(components: URLComponents) {
+    self.init(path: components.path, query: components.query)
+  }
+
+  /// Creates a URI from the provided URL. Takes only the path, query string and fragment.
+  public init?(url: URL) {
+    guard let components = URLComponents(url: url, resolvingAgainstBaseURL: false) else { return nil }
+    self.init(components: components)
+  }
+
+  /// Creates a URI from the provided string. Takes only the path, query string and fragment.
+  public init?(_ string: String) {
+    guard let components = URLComponents(string: string) else { return nil }
+    self.init(components: components)
+  }
+}
+
+public extension URI {
+  /// The path of the URI (e.g. /index.html). Always starts with a slash.
+  var path: String {
+    get { return components.path }
+    set { components.path = newValue.hasPrefix("/") ? newValue : "/\(newValue)" }
+  }
+
+  /// The query string of the URI (e.g. lang=en&page=home). Does not contain a question mark.
+  var query: String? {
+    get { return components.query }
+    set { components.query = newValue }
+  }
+
+  /// The query string items of the URI as an array.
+  var queryItems: [URLQueryItem]? {
+    get { return components.queryItems }
+    set { components.queryItems = newValue }
+  }
+}
+
+public extension URI {
+  /// Returns a URI indicating the root.
+  static let root = URI(path: "/")
+
+  /// Returns the part of the path that doesn't overlap.
+  /// For example '/files/today' with argument '/files' returns 'today'.
+  func relativePath(from path: String) -> String? {
+    var result = self.path
+
+    // Remove the part of the path that overlaps
+    guard let range = result.range(of: path) else { return nil }
+    result = result.replacingCharacters(in: range, with: "")
+
+    // Remove leading slash
+    if result.hasPrefix("/") { result.remove(at: result.startIndex) }
+
+    return result
+  }
+}
+
+extension URI: CustomStringConvertible {
+  public var description: String {
+    return components.description
+  }
+}
diff --git a/Screenshots/MainWindow.png b/Screenshots/MainWindow.png
index dd9a9c7..c9b18b2 100644
Binary files a/Screenshots/MainWindow.png and b/Screenshots/MainWindow.png differ
diff --git a/podfile b/podfile
index 0e1817f..459a639 100644
--- a/podfile
+++ b/podfile
@@ -12,4 +12,5 @@ end
 
 target "Jared" do
 	pod 'RealmSwift'
+    pod 'Telegraph'
 end
diff --git a/readme.md b/readme.md
index 29dbbd0..289cd49 100644
--- a/readme.md
+++ b/readme.md
@@ -1,6 +1,6 @@
 [![Build Status](https://travis-ci.org/ZekeSnider/Jared.svg?branch=master)](https://travis-ci.org/ZekeSnider/Jared)
 [![Carthage compatible](https://img.shields.io/badge/Carthage-compatible-4BC51D.svg?style=flat)](https://github.com/Carthage/Carthage)
-[![Swift 4.0](https://img.shields.io/badge/Swift-4.2-orange.svg?style=flat)](https://developer.apple.com/swift/)
+[![Swift 4.2](https://img.shields.io/badge/Swift-4.2-orange.svg?style=flat)](https://developer.apple.com/swift/)
 
 <a name='Jared'/>
 
@@ -34,9 +34,16 @@ This is required because of macOS permissions that limit access to the messages
 
 3. Run Jared.app
 
-4. Grant access to contacts
+4. (Optional) Grant access to contacts
 You can (optionally) allow Jared access to your contacts so that it can provide and update names of contacts. The contacts are used to set/retrieve names only. Nothing is sent to any server.
 
+5. (Optional) Allow inbound network connections
+If you have a firewall enabled on your mac, and you wish to use the REST API, you will need to allow Jared to accept inbound network connections as necessary. 
+
+6. Grant access to automate Messages
+If you are running macOS Catalina or later, you may see a system dialog requesting access to automate message when using Jared. This allows Jared to send messages.
+
+
 Once you have Jared setup you can type `/help` to get a list of commands. `/help,[command name]` will give you specific information. Use `/reload` to reload plugins.
 
 ## Commands
@@ -57,9 +64,11 @@ For reference, here is a list of the commands built in to Jared. Because functio
 ### Configuration  
 A configuration file is located at `~/Library/Application Support/Jared/config.json` which enables disabling of commands if desired. See [config-sample.json](config-sample.json) for an example.
 
+## REST API
+Jared contains a web server with a REST API that can be enabled. For more information, [check out the REST API documentation](restapi.md).
 
 ## Webhooks
-Jared supports webhooks for sending metadata about incoming and outgoing messages. To configure webhooks, add them to the `config.json` mentioned above. For more info on the webhooks api, [check out the documentation](webhooks.md).
+Jared supports webhooks for sending metadata about incoming and outgoing messages. To configure webhooks, add them to the `config.json` mentioned above. For more info on the webhooks api, [check out the webhook documentation](webhooks.md).
 
 ## Plugins  
 Plugins are loaded dynamically from the `~/Library/Application Support/Jared/Plugins` folder. To install a module, drag it in there and then send `/reload` to Jared. 
diff --git a/restapi.md b/restapi.md
new file mode 100644
index 0000000..70d4906
--- /dev/null
+++ b/restapi.md
@@ -0,0 +1,19 @@
+# REST API
+
+If enabled, Jared exposes a webserver on the port `3000`. You can configure what port it starts up in the `config.json` file under the `webserver.port` property.
+
+## Endpoints
+`POST` `/message` 
+
+This allows you to send text messages to any Person. You will receive a 200 status code if Jared successfully parsed your request and passed it on to the handler. Otherwise, you may receive a 400 bad request exception. Note that the message will not be send if Jared is not "enabled" in the UI.
+
+```
+{
+  "body": {
+    "message": "Jared is an amazing app"
+  },
+  "recipient": {
+    "handle": "handle@email.com",
+  }
+}
+```
\ No newline at end of file