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accept.go
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accept.go
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package worker
import (
"encoding/json"
"errors"
"fmt"
"sync"
"sync/atomic"
"time"
"github.com/acentswap/abridge/cmd/utils"
"github.com/acentswap/abridge/common"
"github.com/acentswap/abridge/dcrm"
"github.com/acentswap/abridge/params"
"github.com/acentswap/abridge/tokens"
"github.com/acentswap/abridge/tokens/btc"
mapset "github.com/deckarep/golang-set"
)
const (
acceptAgree = "AGREE"
acceptDisagree = "DISAGREE"
)
var (
acceptSignStarter sync.Once
cachedAcceptInfos = mapset.NewSet()
maxCachedAcceptInfos = 500
maxAcceptSignTimeInterval = int64(600) // seconds
retryInterval = 3 * time.Second
waitInterval = 20 * time.Second
acceptInfoCh = make(chan *dcrm.SignInfoData, 10)
maxAcceptRoutines = int64(10)
curAcceptRoutines = int64(0)
// those errors will be ignored in accepting
errIdentifierMismatch = errors.New("cross chain bridge identifier mismatch")
errInitiatorMismatch = errors.New("initiator mismatch")
errWrongMsgContext = errors.New("wrong msg context")
errInvalidSignInfo = errors.New("invalid sign info")
errExpiredSignInfo = errors.New("expired sign info")
)
// StartAcceptSignJob accept job
func StartAcceptSignJob() {
if !params.IsDcrmEnabled() {
logWorker("accept", "no need to start accept sign job as dcrm is disabled")
return
}
getAcceptListInterval := params.GetOracleConfig().GetAcceptListInterval
if getAcceptListInterval > 0 {
waitInterval = time.Duration(getAcceptListInterval) * time.Second
}
acceptSignStarter.Do(func() {
logWorker("accept", "start accept sign job")
openLeveldb()
go startAcceptProducer()
utils.TopWaitGroup.Add(1)
go startAcceptConsumer()
})
}
func startAcceptProducer() {
i := 0
for {
signInfo, err := dcrm.GetCurNodeSignInfo()
if err != nil {
logWorkerError("accept", "getCurNodeSignInfo failed", err)
time.Sleep(retryInterval)
continue
}
i++
if i%7 == 0 {
logWorker("accept", "getCurNodeSignInfo", "count", len(signInfo))
}
for _, info := range signInfo {
if utils.IsCleanuping() {
return
}
if info == nil { // maybe a dcrm RPC problem
continue
}
keyID := info.Key
if cachedAcceptInfos.Contains(keyID) {
logWorkerTrace("accept", "ignore cached accept sign info before dispatch", "keyID", keyID)
continue
}
logWorker("accept", "dispatch accept sign info", "keyID", keyID)
acceptInfoCh <- info // produce
}
if utils.IsCleanuping() {
return
}
time.Sleep(waitInterval)
}
}
func startAcceptConsumer() {
defer func() {
closeLeveldb()
utils.TopWaitGroup.Done()
}()
for {
select {
case <-utils.CleanupChan:
logWorker("accept", "stop accept sign job")
return
case info := <-acceptInfoCh: // consume
// loop and check, break if free worker exist
for {
if atomic.LoadInt64(&curAcceptRoutines) < maxAcceptRoutines {
break
}
time.Sleep(1 * time.Second)
}
atomic.AddInt64(&curAcceptRoutines, 1)
go processAcceptInfo(info)
}
}
}
func checkAndUpdateCachedAcceptInfoMap(keyID string) (ok bool) {
if cachedAcceptInfos.Contains(keyID) {
logWorkerTrace("accept", "ignore cached accept sign info in process", "keyID", keyID)
return false
}
if cachedAcceptInfos.Cardinality() >= maxCachedAcceptInfos {
cachedAcceptInfos.Pop()
}
cachedAcceptInfos.Add(keyID)
return true
}
func processAcceptInfo(info *dcrm.SignInfoData) {
defer atomic.AddInt64(&curAcceptRoutines, -1)
keyID := info.Key
if !checkAndUpdateCachedAcceptInfoMap(keyID) {
return
}
isProcessed := false
defer func() {
if !isProcessed {
cachedAcceptInfos.Remove(keyID)
}
}()
args, err := verifySignInfo(info)
ctx := []interface{}{
"keyID", keyID,
}
if args != nil {
ctx = append(ctx,
"identifier", args.Identifier,
"swaptype", args.SwapType.String(),
"pairID", args.PairID,
"swapID", args.SwapID,
"bind", args.Bind,
)
}
switch {
case errors.Is(err, tokens.ErrTxNotStable),
errors.Is(err, tokens.ErrTxNotFound),
errors.Is(err, tokens.ErrRPCQueryError):
ctx = append(ctx, "err", err)
logWorkerTrace("accept", "ignore sign", ctx...)
return
case errors.Is(err, errIdentifierMismatch):
ctx = append(ctx, "err", err)
logWorkerTrace("accept", "discard sign", ctx...)
isProcessed = true
return
case errors.Is(err, errInitiatorMismatch),
errors.Is(err, errWrongMsgContext),
errors.Is(err, errExpiredSignInfo),
errors.Is(err, errInvalidSignInfo),
errors.Is(err, tokens.ErrUnknownPairID),
errors.Is(err, tokens.ErrNoBtcBridge):
ctx = append(ctx, "err", err)
logWorker("accept", "discard sign", ctx...)
isProcessed = true
return
}
agreeResult := acceptAgree
if err != nil {
logWorkerError("accept", "DISAGREE sign", err, ctx...)
agreeResult = acceptDisagree
}
ctx = append(ctx, "result", agreeResult)
res, err := dcrm.DoAcceptSign(keyID, agreeResult, info.MsgHash, info.MsgContext)
if err != nil {
ctx = append(ctx, "rpcResult", res)
logWorkerError("accept", "accept sign job failed", err, ctx...)
} else {
logWorker("accept", "accept sign job finish", ctx...)
isProcessed = true
}
}
func getBuildTxArgsFromMsgContext(signInfo *dcrm.SignInfoData) (*tokens.BuildTxArgs, error) {
msgContext := signInfo.MsgContext
if len(msgContext) != 1 {
return nil, errWrongMsgContext
}
var args tokens.BuildTxArgs
err := json.Unmarshal([]byte(msgContext[0]), &args)
if err != nil {
return nil, errWrongMsgContext
}
return &args, nil
}
func verifySignInfo(signInfo *dcrm.SignInfoData) (args *tokens.BuildTxArgs, err error) {
timestamp, err := common.GetUint64FromStr(signInfo.TimeStamp)
if err != nil || int64(timestamp/1000)+maxAcceptSignTimeInterval < time.Now().Unix() {
logWorkerTrace("accept", "expired accept sign info", "signInfo", signInfo)
return nil, errExpiredSignInfo
}
if signInfo.Key == "" || signInfo.Account == "" || signInfo.GroupID == "" {
logWorkerWarn("accept", "invalid accept sign info", "signInfo", signInfo)
return nil, errInvalidSignInfo
}
if !params.IsDcrmInitiator(signInfo.Account) {
return nil, errInitiatorMismatch
}
args, err = getBuildTxArgsFromMsgContext(signInfo)
if err != nil {
return args, err
}
msgHash := signInfo.MsgHash
msgContext := signInfo.MsgContext
switch args.Identifier {
case params.GetIdentifier():
case params.GetReplaceIdentifier():
case tokens.AggregateIdentifier:
if btc.BridgeInstance == nil {
return args, tokens.ErrNoBtcBridge
}
logWorker("accept", "verifySignInfo", "msgHash", msgHash, "msgContext", msgContext)
err = btc.BridgeInstance.VerifyAggregateMsgHash(msgHash, args)
if err != nil {
return args, err
}
return args, nil
default:
return args, errIdentifierMismatch
}
logWorker("accept", "verifySignInfo", "keyID", signInfo.Key, "msgHash", msgHash, "msgContext", msgContext)
if lvldbHandle != nil && args.GetTxNonce() > 0 { // only for eth like chain
err = CheckAcceptRecord(args)
if err != nil {
return args, err
}
}
err = rebuildAndVerifyMsgHash(signInfo.Key, msgHash, args)
if err != nil {
return args, err
}
return args, nil
}
func rebuildAndVerifyMsgHash(keyID string, msgHash []string, args *tokens.BuildTxArgs) error {
var srcBridge, dstBridge tokens.CrossChainBridge
switch args.SwapType {
case tokens.SwapinType:
srcBridge = tokens.SrcBridge
dstBridge = tokens.DstBridge
case tokens.SwapoutType:
srcBridge = tokens.DstBridge
dstBridge = tokens.SrcBridge
default:
return fmt.Errorf("unknown swap type %v", args.SwapType)
}
tokenCfg := dstBridge.GetTokenConfig(args.PairID)
if tokenCfg == nil {
return tokens.ErrUnknownPairID
}
ctx := []interface{}{
"keyID", keyID,
"identifier", args.Identifier,
"swaptype", args.SwapType.String(),
"pairID", args.PairID,
"swapID", args.SwapID,
"bind", args.Bind,
}
swapInfo, err := verifySwapTransaction(srcBridge, args.PairID, args.SwapID, args.Bind, args.TxType)
if err != nil {
logWorkerError("accept", "verifySignInfo failed", err, ctx...)
return err
}
buildTxArgs := &tokens.BuildTxArgs{
SwapInfo: args.SwapInfo,
From: tokenCfg.DcrmAddress,
OriginValue: swapInfo.Value,
Extra: args.Extra,
}
rawTx, err := dstBridge.BuildRawTransaction(buildTxArgs)
if err != nil {
logWorkerError("accept", "build raw tx failed", err, ctx...)
return err
}
err = dstBridge.VerifyMsgHash(rawTx, msgHash)
if err != nil {
logWorkerError("accept", "verify message hash failed", err, ctx...)
return err
}
if lvldbHandle != nil && args.GetTxNonce() > 0 { // only for eth like chain
go saveAcceptRecord(dstBridge, keyID, buildTxArgs, rawTx)
}
logWorker("accept", "verify message hash success", ctx...)
return nil
}
func saveAcceptRecord(bridge tokens.CrossChainBridge, keyID string, args *tokens.BuildTxArgs, rawTx interface{}) {
impl, ok := bridge.(interface {
GetSignedTxHashOfKeyID(keyID, pairID string, rawTx interface{}) (txHash string, err error)
})
if !ok {
return
}
ctx := []interface{}{
"keyID", keyID,
"identifier", args.Identifier,
"swaptype", args.SwapType.String(),
"pairID", args.PairID,
"swapID", args.SwapID,
"bind", args.Bind,
}
swapTx, err := impl.GetSignedTxHashOfKeyID(keyID, args.PairID, rawTx)
if err != nil {
logWorkerError("accept", "get signed tx hash failed", err, ctx...)
return
}
ctx = append(ctx, "swaptx", swapTx)
err = AddAcceptRecord(args, swapTx)
if err != nil {
logWorkerError("accept", "save accept record to db failed", err, ctx...)
return
}
logWorker("accept", "save accept record to db sucess", ctx...)
}