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faucet.go
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faucet.go
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package client
import (
"context"
"net/http"
"github.com/pkg/errors"
"github.com/iotaledger/goshimmer/packages/app/faucet"
"github.com/iotaledger/goshimmer/packages/app/jsonmodels"
"github.com/iotaledger/goshimmer/packages/core/pow"
"github.com/iotaledger/goshimmer/packages/protocol/engine/ledger/vm/devnetvm"
"github.com/iotaledger/hive.go/crypto/identity"
)
const (
routeFaucetRequestBroadcast = "faucetrequest"
routeFaucetRequestAPI = "faucet"
)
var (
defaultPOWTarget = 25
powWorker = pow.New(1)
)
// BroadcastFaucetRequest requests funds from faucet nodes by sending a faucet request payload block.
func (api *GoShimmerAPI) BroadcastFaucetRequest(base58EncodedAddr string, powTarget int, pledgeIDs ...string) (*jsonmodels.FaucetRequestResponse, error) {
var aManaPledgeID identity.ID
var cManaPledgeID identity.ID
if len(pledgeIDs) > 1 {
aManaPledgeIDFromString, err := identity.DecodeIDBase58(pledgeIDs[0])
if err == nil {
aManaPledgeID = aManaPledgeIDFromString
}
cManaPledgeIDFromString, err := identity.DecodeIDBase58(pledgeIDs[1])
if err == nil {
cManaPledgeID = cManaPledgeIDFromString
}
}
address, err := devnetvm.AddressFromBase58EncodedString(base58EncodedAddr)
if err != nil {
return nil, errors.Wrapf(err, "could not decode address from string")
}
nonce, err := computeFaucetPoW(address, aManaPledgeID, cManaPledgeID, powTarget)
if err != nil {
return nil, errors.Wrapf(err, "could not compute faucet PoW")
}
res := &jsonmodels.FaucetRequestResponse{}
if err := api.do(http.MethodPost, routeFaucetRequestBroadcast,
&jsonmodels.FaucetRequest{
Address: base58EncodedAddr,
AccessManaPledgeID: aManaPledgeID.EncodeBase58(),
ConsensusManaPledgeID: cManaPledgeID.EncodeBase58(),
Nonce: nonce,
}, res); err != nil {
return nil, err
}
return res, nil
}
// SendFaucetRequestAPI requests funds from faucet nodes by sending a faucet request directly to the faucet node.
func (api *GoShimmerAPI) SendFaucetRequestAPI(base58EncodedAddr string, powTarget int, accessPledgeID, consensusPledgeID string) (*jsonmodels.FaucetAPIResponse, error) {
var aManaPledgeID identity.ID
var cManaPledgeID identity.ID
if accessPledgeID == "" && consensusPledgeID == "" {
return nil, errors.New("accessPledgeID and consensusPledgeID must not be empty")
}
aManaPledgeIDFromString, err := identity.DecodeIDBase58(accessPledgeID)
if err == nil {
aManaPledgeID = aManaPledgeIDFromString
}
cManaPledgeIDFromString, err := identity.DecodeIDBase58(consensusPledgeID)
if err == nil {
cManaPledgeID = cManaPledgeIDFromString
}
address, err := devnetvm.AddressFromBase58EncodedString(base58EncodedAddr)
if err != nil {
return nil, errors.Wrap(err, "could not decode address from string")
}
nonce, err := computeFaucetPoW(address, aManaPledgeID, cManaPledgeID, powTarget)
if err != nil {
return nil, errors.Wrap(err, "could not compute faucet PoW")
}
res := &jsonmodels.FaucetAPIResponse{}
if err := api.do(http.MethodPost, routeFaucetRequestAPI,
&jsonmodels.FaucetRequest{
Address: base58EncodedAddr,
AccessManaPledgeID: aManaPledgeID.EncodeBase58(),
ConsensusManaPledgeID: cManaPledgeID.EncodeBase58(),
Nonce: nonce,
}, res); err != nil {
return nil, err
}
return res, nil
}
func computeFaucetPoW(address devnetvm.Address, aManaPledgeID, cManaPledgeID identity.ID, powTarget int) (nonce uint64, err error) {
if powTarget < 0 {
powTarget = defaultPOWTarget
}
faucetRequest := faucet.NewRequest(address, aManaPledgeID, cManaPledgeID, 0)
objectBytes, err := faucetRequest.Bytes()
if err != nil {
return
}
powRelevantBytes := objectBytes[:len(objectBytes)-pow.NonceBytes]
return powWorker.Mine(context.Background(), powRelevantBytes, powTarget)
}