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spentsync.go
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spentsync.go
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package spentsync
import (
"compound/core"
"compound/worker"
"context"
"crypto/md5"
"errors"
"fmt"
"io"
"math/big"
"github.com/fox-one/mixin-sdk-go"
"github.com/fox-one/pkg/logger"
"github.com/fox-one/pkg/store/db"
"github.com/gofrs/uuid"
)
// SpentSync spent sync worker
type SpentSync struct {
worker.TickWorker
db *db.DB
walletStore core.WalletStore
transactionStore core.TransactionStore
}
// New new spent sync worker
func New(
db *db.DB,
walletStr core.WalletStore,
transactionStr core.TransactionStore,
) *SpentSync {
return &SpentSync{
db: db,
walletStore: walletStr,
transactionStore: transactionStr,
}
}
// Run worker run
func (w *SpentSync) Run(ctx context.Context) error {
return w.StartTick(ctx, func(ctx context.Context) error {
return w.onWork(ctx)
})
}
func (w *SpentSync) onWork(ctx context.Context) error {
log := logger.FromContext(ctx)
transfers, err := w.walletStore.ListNotPassedTransfers(ctx)
if err != nil {
log.WithError(err).Errorln("wallets.ListNotPassedTransfers")
return err
}
if len(transfers) == 0 {
return errors.New("EOF")
}
for _, transfer := range transfers {
err = w.handleTransfer(ctx, transfer)
if err != nil {
continue
}
}
return nil
}
func (w *SpentSync) handleTransfer(ctx context.Context, transfer *core.Transfer) error {
log := logger.FromContext(ctx).WithField("trace", transfer.TraceID)
log.Debugf("handle transfer")
outputs, err := w.walletStore.ListSpentBy(ctx, transfer.AssetID, transfer.TraceID)
if err != nil {
log.WithError(err).Errorln("wallets.ListSpentBy")
return err
}
if len(outputs) == 0 {
log.Debugln("no outputs spent, skip")
return nil
}
output := outputs[0]
if output.State != mixin.UTXOStateSpent {
log.Debugln("utxo is not spent, skip")
return nil
}
fmt.Println("ID:", output.ID, ":trace:", output.TraceID, "asset", output.AssetID, ":amount:", output.Amount, ":memo:", output.Memo, ":data:", output.Data)
signedTx := output.UTXO.SignedTx
if signedTx == "" {
log.Debugln("signed tx is empty, skip")
return nil
}
//add transaction
snapshotTraceID, err := w.snapshotTraceID(ctx, signedTx)
if err != nil {
log.WithError(err).Errorln("get snapshot trace id error")
return nil
}
transaction, err := core.BuildTransactionFromTransfer(ctx, transfer, snapshotTraceID)
if err != nil {
return err
}
if err = w.transactionStore.Create(ctx, transaction); err != nil {
log.WithError(err).Errorln("create transaction error")
return err
}
//update transfer
transfer.Passed = true
if err := w.walletStore.UpdateTransfer(ctx, transfer); err != nil {
log.WithError(err).Errorln("wallets.UpdateTransfer")
return err
}
return nil
}
func (w *SpentSync) snapshotTraceID(ctx context.Context, signedTx string) (string, error) {
log := logger.FromContext(ctx)
tx, err := mixin.TransactionFromRaw(signedTx)
if err != nil {
log.WithError(err).Debugln("decode transaction from raw tx failed")
return "", err
}
hash, err := tx.TransactionHash()
if err != nil {
return "", err
}
traceID, err := w.mixinRawTransactionTraceID(hash.String(), 0)
if err != nil {
return "", err
}
return traceID, nil
}
func (w *SpentSync) mixinRawTransactionTraceID(hash string, index uint8) (string, error) {
h := md5.New()
_, err := io.WriteString(h, hash)
if err != nil {
return "", err
}
b := new(big.Int).SetInt64(int64(index))
_, err = h.Write(b.Bytes())
if err != nil {
return "", err
}
s := h.Sum(nil)
s[6] = (s[6] & 0x0f) | 0x30
s[8] = (s[8] & 0x3f) | 0x80
sid, err := uuid.FromBytes(s)
if err != nil {
return "", err
}
return sid.String(), nil
}