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tracker.rs
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tracker.rs
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use anyhow::{Context, Result};
use bitcoin::{BlockHash, Transaction, Txid};
use crate::{
cache::Cache,
chain::Chain,
config::Config,
daemon::Daemon,
db::DBStore,
index::Index,
mempool::{FeeHistogram, Mempool},
metrics::Metrics,
signals::ExitFlag,
status::{Balance, ScriptHashStatus, UnspentEntry},
};
/// Electrum protocol subscriptions' tracker
pub struct Tracker {
index: Index,
mempool: Mempool,
metrics: Metrics,
ignore_mempool: bool,
}
pub(crate) enum Error {
NotReady,
}
impl Tracker {
pub fn new(config: &Config, metrics: Metrics) -> Result<Self> {
let store = DBStore::open(&config.db_path, config.auto_reindex)?;
let chain = Chain::new(config.network);
Ok(Self {
index: Index::load(
store,
chain,
&metrics,
config.index_batch_size,
config.index_lookup_limit,
config.reindex_last_blocks,
)
.context("failed to open index")?,
mempool: Mempool::new(&metrics),
metrics,
ignore_mempool: config.ignore_mempool,
})
}
pub(crate) fn chain(&self) -> &Chain {
self.index.chain()
}
pub(crate) fn fees_histogram(&self) -> &FeeHistogram {
self.mempool.fees_histogram()
}
pub(crate) fn metrics(&self) -> &Metrics {
&self.metrics
}
pub(crate) fn get_unspent(&self, status: &ScriptHashStatus) -> Vec<UnspentEntry> {
status.get_unspent(self.index.chain())
}
pub(crate) fn sync(&mut self, daemon: &Daemon, exit_flag: &ExitFlag) -> Result<bool> {
let done = self.index.sync(daemon, exit_flag)?;
if done && !self.ignore_mempool {
self.mempool.sync(daemon);
// TODO: double check tip - and retry on diff
}
Ok(done)
}
pub(crate) fn status(&self) -> Result<(), Error> {
if self.index.is_ready() {
return Ok(());
}
Err(Error::NotReady)
}
pub(crate) fn update_scripthash_status(
&self,
status: &mut ScriptHashStatus,
daemon: &Daemon,
cache: &Cache,
) -> Result<bool> {
let prev_statushash = status.statushash();
status.sync(&self.index, &self.mempool, daemon, cache)?;
Ok(prev_statushash != status.statushash())
}
pub(crate) fn get_balance(&self, status: &ScriptHashStatus) -> Balance {
status.get_balance(self.chain())
}
pub(crate) fn lookup_transaction(
&self,
daemon: &Daemon,
txid: Txid,
) -> Result<Option<(BlockHash, Transaction)>> {
// Note: there are two blocks with coinbase transactions having same txid (see BIP-30)
let blockhashes = self.index.filter_by_txid(txid);
let mut result = None;
daemon.for_blocks(blockhashes, |blockhash, block| {
for tx in block.txdata {
if result.is_some() {
return;
}
if tx.txid() == txid {
result = Some((blockhash, tx));
return;
}
}
})?;
Ok(result)
}
}