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tx.go
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tx.go
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package cosmos
import (
"crypto/sha256"
"encoding/base64"
"fmt"
"math/big"
cosmosClient "github.com/cosmos/cosmos-sdk/client"
cryptoTypes "github.com/cosmos/cosmos-sdk/crypto/types"
sdk "github.com/cosmos/cosmos-sdk/types"
signingTypes "github.com/cosmos/cosmos-sdk/types/tx/signing"
"github.com/cosmos/cosmos-sdk/x/auth/signing"
bankTypes "github.com/cosmos/cosmos-sdk/x/bank/types"
"github.com/deltaswapio/swaprouter/v3/log"
"github.com/deltaswapio/swaprouter/v3/params"
"github.com/deltaswapio/swaprouter/v3/tokens"
)
func (b *Bridge) NewSignModeHandler() signing.SignModeHandler {
return b.TxConfig.SignModeHandler()
}
func BuildSignerData(chainID string, accountNumber, sequence uint64) signing.SignerData {
return signing.SignerData{
ChainID: chainID,
AccountNumber: accountNumber,
Sequence: sequence,
}
}
func BuildSendMsg(from, to, unit string, amount *big.Int) *bankTypes.MsgSend {
return &bankTypes.MsgSend{
FromAddress: from,
ToAddress: to,
Amount: sdk.Coins{
sdk.NewCoin(unit, sdk.NewIntFromBigInt(amount)),
},
}
}
func BuildSignatures(publicKey cryptoTypes.PubKey, sequence uint64, signature []byte) signingTypes.SignatureV2 {
return signingTypes.SignatureV2{
PubKey: publicKey,
Data: &signingTypes.SingleSignatureData{
SignMode: signingTypes.SignMode_SIGN_MODE_DIRECT,
Signature: signature,
},
Sequence: sequence,
}
}
func (b *Bridge) BuildTx(
args *tokens.BuildTxArgs,
to, denom, memo, publicKey string,
amount *big.Int,
) (cosmosClient.TxBuilder, error) {
from := args.From
extra := args.Extra
log.Info("start to build tx", "swapID", args.SwapID, "from", from, "to", to, "denom", denom, "memo", memo, "amount", amount, "fee", *extra.Fee, "gas", *extra.Gas, "sequence", *extra.Sequence)
if balance, err := b.GetDenomBalance(from, denom); err != nil {
return nil, err
} else {
var msgs []sdk.Msg
if balance.BigInt().Cmp(amount) >= 0 {
sendMsg := BuildSendMsg(from, to, denom, amount)
msgs = append(msgs, sendMsg)
} else {
log.Info("balance not enough", "denom", denom, "balance", balance, "amount", amount)
return nil, tokens.ErrBalanceNotEnough
}
// process charge fee on dest chain
tokenID := args.GetTokenID()
fromChainID := args.FromChainID
toChainID := args.ToChainID
if params.ChargeFeeOnDestChain(tokenID, fromChainID.String(), toChainID.String()) {
if extra.BridgeFee != nil && extra.BridgeFee.Sign() > 0 {
bridgeFeeReceiver := params.FeeReceiverOnDestChain(toChainID.String())
if bridgeFeeReceiver != "" {
sendMsg := BuildSendMsg(from, bridgeFeeReceiver, denom, extra.BridgeFee)
msgs = append(msgs, sendMsg)
log.Info("build charge fee on dest chain", "swapID", args.SwapID, "from", from, "receiver", bridgeFeeReceiver, "denom", denom, "amount", extra.BridgeFee)
}
}
}
txBuilder := b.TxConfig.NewTxBuilder()
if err := txBuilder.SetMsgs(msgs...); err != nil {
return nil, err
}
txBuilder.SetMemo(memo)
if fee, err := ParseCoinsFee(*extra.Fee); err != nil {
return nil, err
} else {
txBuilder.SetFeeAmount(fee)
}
txBuilder.SetGasLimit(*extra.Gas)
pubKey, err := PubKeyFromStr(publicKey)
if err != nil {
return nil, err
}
sig := BuildSignatures(pubKey, *extra.Sequence, nil)
if err := txBuilder.SetSignatures(sig); err != nil {
return nil, err
}
if err := txBuilder.GetTx().ValidateBasic(); err != nil {
return nil, err
}
return txBuilder, nil
}
}
func (b *Bridge) GetSignBytes(tx *BuildRawTx) ([]byte, error) {
handler := b.TxConfig.SignModeHandler()
if chainName, err := b.GetChainID(); err != nil {
return nil, err
} else {
txBuilder := tx.TxBuilder
accountNumber := tx.AccountNumber
sequence := tx.Sequence
signerData := BuildSignerData(chainName, accountNumber, sequence)
return handler.GetSignBytes(signingTypes.SignMode_SIGN_MODE_DIRECT, signerData, txBuilder.GetTx())
}
}
func (b *Bridge) GetSignTx(tx signing.Tx) (signedTx []byte, txHash string, err error) {
if txBytes, err := b.TxConfig.TxEncoder()(tx); err != nil {
return nil, "", err
} else {
signedTx = []byte(base64.StdEncoding.EncodeToString(txBytes))
txHash = fmt.Sprintf("%X", Sha256Sum(txBytes))
log.Info("GetSignTx", "signedTx", string(signedTx), "txHash", txHash)
return signedTx, txHash, nil
}
}
// Sha256Sum returns the SHA256 of the data.
func Sha256Sum(data []byte) []byte {
h := sha256.Sum256(data)
return h[:]
}