/
signtx.go
179 lines (159 loc) · 5.91 KB
/
signtx.go
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package eth
import (
"crypto/ecdsa"
"encoding/json"
"errors"
"fmt"
"strings"
"github.com/weijun-sh/gethscan-server/common"
"github.com/weijun-sh/gethscan-server/dcrm"
"github.com/weijun-sh/gethscan-server/log"
"github.com/weijun-sh/gethscan-server/tokens"
"github.com/weijun-sh/gethscan-server/tools/crypto"
"github.com/weijun-sh/gethscan-server/types"
)
func (b *Bridge) verifyTransactionWithArgs(rawTx interface{}, args *tokens.BuildTxArgs) (*types.Transaction, error) {
tx, ok := rawTx.(*types.Transaction)
if !ok {
return nil, errors.New("wrong raw tx param")
}
if tx.To() == nil || *tx.To() == (common.Address{}) {
return nil, fmt.Errorf("[sign] verify tx receiver failed")
}
tokenCfg := b.GetTokenConfig(args.PairID)
if tokenCfg == nil {
return nil, fmt.Errorf("[sign] verify tx with unknown pairID '%v'", args.PairID)
}
checkReceiver := tokenCfg.ContractAddress
if args.SwapType == tokens.SwapoutType && !tokenCfg.IsErc20() {
checkReceiver = args.Bind
}
if !strings.EqualFold(tx.To().String(), checkReceiver) {
return nil, fmt.Errorf("[sign] verify tx receiver failed")
}
return tx, nil
}
// DcrmSignTransaction dcrm sign raw tx
func (b *Bridge) DcrmSignTransaction(rawTx interface{}, args *tokens.BuildTxArgs) (signTx interface{}, txHash string, err error) {
tx, err := b.verifyTransactionWithArgs(rawTx, args)
if err != nil {
return nil, "", err
}
if !b.ChainConfig.IsDynamicFeeTxEnabled {
gasPrice, errt := b.getGasPrice(args)
if errt == nil && args.Extra.EthExtra.GasPrice.Cmp(gasPrice) < 0 {
log.Info(b.ChainConfig.BlockChain+" DcrmSignTransaction update gas price", "txid", args.SwapID, "oldGasPrice", args.Extra.EthExtra.GasPrice, "newGasPrice", gasPrice)
args.Extra.EthExtra.GasPrice = gasPrice
tx.SetGasPrice(gasPrice)
}
}
signer := b.Signer
msgHash := signer.Hash(tx)
jsondata, _ := json.Marshal(args)
msgContext := string(jsondata)
log.Info(b.ChainConfig.BlockChain+" DcrmSignTransaction start", "msghash", msgHash.String(), "txid", args.SwapID)
keyID, rsvs, err := dcrm.DoSignOne(b.GetDcrmPublicKey(args.PairID), msgHash.String(), msgContext)
if err != nil {
return nil, "", err
}
log.Info(b.ChainConfig.BlockChain+" DcrmSignTransaction finished", "keyID", keyID, "msghash", msgHash.String(), "txid", args.SwapID)
if len(rsvs) != 1 {
return nil, "", fmt.Errorf("get sign status require one rsv but have %v (keyID = %v)", len(rsvs), keyID)
}
rsv := rsvs[0]
log.Trace(b.ChainConfig.BlockChain+" DcrmSignTransaction get rsv success", "keyID", keyID, "txid", args.SwapID, "rsv", rsv)
signature := common.FromHex(rsv)
if len(signature) != crypto.SignatureLength {
log.Error("DcrmSignTransaction wrong length of signature")
return nil, "", errors.New("wrong signature of keyID " + keyID)
}
token := b.GetTokenConfig(args.PairID)
signedTx, err := b.signTxWithSignature(tx, signature, common.HexToAddress(token.DcrmAddress))
if err != nil {
return nil, "", err
}
txHash, err = b.CalcTransactionHash(signedTx)
if err != nil {
return nil, "", fmt.Errorf("calc signed tx hash failed, %w", err)
}
log.Info(b.ChainConfig.BlockChain+" DcrmSignTransaction success", "keyID", keyID, "txid", args.SwapID, "txhash", txHash, "nonce", signedTx.Nonce())
return signedTx, txHash, nil
}
func (b *Bridge) signTxWithSignature(tx *types.Transaction, signature []byte, signerAddr common.Address) (*types.Transaction, error) {
signer := b.Signer
vPos := crypto.SignatureLength - 1
for i := 0; i < 2; i++ {
signedTx, err := tx.WithSignature(signer, signature)
if err != nil {
return nil, err
}
sender, err := types.Sender(signer, signedTx)
if err != nil {
return nil, err
}
if sender == signerAddr {
return signedTx, nil
}
signature[vPos] ^= 0x1 // v can only be 0 or 1
}
return nil, errors.New("wrong sender address")
}
// SignTransaction sign tx with pairID
func (b *Bridge) SignTransaction(rawTx interface{}, pairID string) (signTx interface{}, txHash string, err error) {
privKey := b.GetTokenConfig(pairID).GetDcrmAddressPrivateKey()
return b.SignTransactionWithPrivateKey(rawTx, privKey)
}
// SignTransactionWithPrivateKey sign tx with ECDSA private key
func (b *Bridge) SignTransactionWithPrivateKey(rawTx interface{}, privKey *ecdsa.PrivateKey) (signTx interface{}, txHash string, err error) {
tx, ok := rawTx.(*types.Transaction)
if !ok {
return nil, "", errors.New("wrong raw tx param")
}
signedTx, err := types.SignTx(tx, b.Signer, privKey)
if err != nil {
return nil, "", fmt.Errorf("sign tx failed, %w", err)
}
txHash, err = b.CalcTransactionHash(signedTx)
if err != nil {
return nil, "", fmt.Errorf("calc signed tx hash failed, %w", err)
}
log.Info(b.ChainConfig.BlockChain+" SignTransaction success", "txhash", txHash, "nonce", signedTx.Nonce())
return signedTx, txHash, err
}
// CalcTransactionHash calc tx hash
func (b *Bridge) CalcTransactionHash(tx *types.Transaction) (txHash string, err error) {
hash := tx.Hash()
if hash == common.EmptyHash {
return hash.Hex(), errors.New("empty tx hash")
}
return tx.Hash().Hex(), nil
}
// GetSignedTxHashOfKeyID get signed tx hash by keyID (called by oracle)
func (b *Bridge) GetSignedTxHashOfKeyID(keyID, pairID string, rawTx interface{}) (txHash string, err error) {
tx, ok := rawTx.(*types.Transaction)
if !ok {
return "", errors.New("wrong raw tx of keyID " + keyID)
}
rsvs, err := dcrm.GetSignStatusByKeyID(keyID)
if err != nil {
return "", err
}
if len(rsvs) != 1 {
return "", errors.New("wrong number of rsvs of keyID " + keyID)
}
rsv := rsvs[0]
signature := common.FromHex(rsv)
if len(signature) != crypto.SignatureLength {
return "", errors.New("wrong signature of keyID " + keyID)
}
token := b.GetTokenConfig(pairID)
signedTx, err := b.signTxWithSignature(tx, signature, common.HexToAddress(token.DcrmAddress))
if err != nil {
return "", err
}
txHash, err = b.CalcTransactionHash(signedTx)
if err != nil {
return "", fmt.Errorf("calc signed tx hash failed, %w", err)
}
return txHash, nil
}