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signtx.go
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signtx.go
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package cosmos
import (
"encoding/json"
"errors"
"fmt"
"github.com/cosmos/cosmos-sdk/crypto/keys/secp256k1"
"github.com/deltaswapio/swaprouter/v3/common"
"github.com/deltaswapio/swaprouter/v3/log"
"github.com/deltaswapio/swaprouter/v3/mpc"
"github.com/deltaswapio/swaprouter/v3/params"
"github.com/deltaswapio/swaprouter/v3/router"
"github.com/deltaswapio/swaprouter/v3/tokens"
"github.com/deltaswapio/swaprouter/v3/tools/crypto"
)
// MPCSignTransaction mpc sign raw tx
func (b *Bridge) MPCSignTransaction(rawTx interface{}, args *tokens.BuildTxArgs) (signedTx interface{}, txHash string, err error) {
if buildRawTx, ok := rawTx.(*BuildRawTx); !ok {
return nil, txHash, errors.New("wrong raw tx param")
} else {
mpcParams := params.GetMPCConfig(b.UseFastMPC)
if mpcParams.SignWithPrivateKey {
priKey := mpcParams.GetSignerPrivateKey(b.ChainConfig.ChainID)
return b.SignTransactionWithPrivateKey(buildRawTx, priKey)
}
mpcPubkey := router.GetMPCPublicKey(args.From)
if mpcPubkey == "" {
return nil, "", tokens.ErrMissMPCPublicKey
}
pubKey, err := PubKeyFromStr(mpcPubkey)
if err != nil {
return nil, txHash, err
}
if signBytes, err := b.GetSignBytes(buildRawTx); err != nil {
return nil, "", err
} else {
jsondata, _ := json.Marshal(args.GetExtraArgs())
msgContext := string(jsondata)
txid := args.SwapID
logPrefix := b.ChainConfig.BlockChain + " MPCSignTransaction "
log.Info(logPrefix+"start", "txid", txid)
mpcConfig := mpc.GetMPCConfig(b.UseFastMPC)
msgHash := fmt.Sprintf("%X", Sha256Sum(signBytes))
if keyID, rsvs, err := mpcConfig.DoSignOneEC(mpcPubkey, msgHash, msgContext); err != nil {
log.Info(logPrefix+"failed", "keyID", keyID, "txid", txid, "err", err)
return nil, "", err
} else {
if len(rsvs) != 1 {
log.Warn("get sign status require one rsv but return many",
"rsvs", len(rsvs), "keyID", keyID, "txid", txid)
return nil, "", errors.New("get sign status require one rsv but return many")
}
rsv := rsvs[0]
log.Trace(logPrefix+"get rsv signature success", "keyID", keyID, "txid", txid, "rsv", rsv)
signature := common.FromHex(rsv)
if len(signature) == crypto.SignatureLength {
signature = signature[:crypto.SignatureLength-1]
}
if len(signature) != crypto.SignatureLength-1 {
log.Error("wrong signature length", "keyID", keyID, "txid", txid, "have", len(signature), "want", crypto.SignatureLength)
return nil, "", errors.New("wrong signature length")
}
if !pubKey.VerifySignature(signBytes, signature) {
log.Error("verify signature failed", "signBytes", common.ToHex(signBytes), "signature", signature)
return nil, "", errors.New("wrong signature")
}
sequence := buildRawTx.Sequence
sig := BuildSignatures(pubKey, sequence, signature)
txBuilder := buildRawTx.TxBuilder
if err := txBuilder.SetSignatures(sig); err != nil {
return nil, "", err
}
return b.GetSignTx(txBuilder.GetTx())
}
}
}
}
// SignTransactionWithPrivateKey sign tx with ECDSA private key
func (b *Bridge) SignTransactionWithPrivateKey(buildRawTx *BuildRawTx, privKey string) (signedTx interface{}, txHash string, err error) {
if ecPrikey, err := crypto.HexToECDSA(privKey); err != nil {
return nil, "", err
} else {
ecPriv := &secp256k1.PrivKey{Key: ecPrikey.D.Bytes()}
if signBytes, err := b.GetSignBytes(buildRawTx); err != nil {
return nil, "", err
} else {
if signature, err := ecPriv.Sign(signBytes); err != nil {
return nil, "", err
} else {
if len(signature) == crypto.SignatureLength {
signature = signature[:crypto.SignatureLength-1]
}
if len(signature) != crypto.SignatureLength-1 {
log.Error("wrong length of signature", "length", len(signature))
return nil, "", errors.New("wrong signature length")
}
pubKey := ecPriv.PubKey()
if !pubKey.VerifySignature(signBytes, signature) {
log.Error("verify signature failed", "signBytes", common.ToHex(signBytes), "signature", signature)
return nil, "", errors.New("wrong signature")
}
sequence := buildRawTx.Sequence
sig := BuildSignatures(pubKey, sequence, signature)
txBuilder := buildRawTx.TxBuilder
if err := txBuilder.SetSignatures(sig); err != nil {
return nil, "", err
}
if err := txBuilder.GetTx().ValidateBasic(); err != nil {
return nil, "", err
}
return b.GetSignTx(txBuilder.GetTx())
}
}
}
}