81 lines
3.1 KiB
Go
81 lines
3.1 KiB
Go
// Copyright 2021 Evmos Foundation
|
|
// This file is part of Evmos' Ethermint library.
|
|
//
|
|
// The Ethermint library is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Lesser General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// The Ethermint library is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU Lesser General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Lesser General Public License
|
|
// along with the Ethermint library. If not, see https://github.com/evmos/ethermint/blob/main/LICENSE
|
|
package ante
|
|
|
|
import (
|
|
"math/big"
|
|
|
|
errorsmod "cosmossdk.io/errors"
|
|
sdk "github.com/cosmos/cosmos-sdk/types"
|
|
errortypes "github.com/cosmos/cosmos-sdk/types/errors"
|
|
ethtypes "github.com/ethereum/go-ethereum/core/types"
|
|
evmtypes "github.com/evmos/ethermint/x/evm/types"
|
|
)
|
|
|
|
// EthSigVerificationDecorator validates an ethereum signatures
|
|
type EthSigVerificationDecorator struct {
|
|
evmKeeper EVMKeeper
|
|
}
|
|
|
|
// NewEthSigVerificationDecorator creates a new EthSigVerificationDecorator
|
|
func NewEthSigVerificationDecorator(ek EVMKeeper) EthSigVerificationDecorator {
|
|
return EthSigVerificationDecorator{
|
|
evmKeeper: ek,
|
|
}
|
|
}
|
|
|
|
// AnteHandle validates checks that the registered chain id is the same as the one on the message, and
|
|
// that the signer address matches the one defined on the message.
|
|
// It's not skipped for RecheckTx, because it set `From` address which is critical from other ante handler to work.
|
|
// Failure in RecheckTx will prevent tx to be included into block, especially when CheckTx succeed, in which case user
|
|
// won't see the error message.
|
|
func (esvd EthSigVerificationDecorator) AnteHandle(ctx sdk.Context, tx sdk.Tx, simulate bool, next sdk.AnteHandler) (newCtx sdk.Context, err error) {
|
|
chainID := esvd.evmKeeper.ChainID()
|
|
chainCfg := esvd.evmKeeper.GetChainConfig(ctx)
|
|
ethCfg := chainCfg.EthereumConfig(chainID)
|
|
blockNum := big.NewInt(ctx.BlockHeight())
|
|
signer := ethtypes.MakeSigner(ethCfg, blockNum)
|
|
|
|
for _, msg := range tx.GetMsgs() {
|
|
msgEthTx, ok := msg.(*evmtypes.MsgEthereumTx)
|
|
if !ok {
|
|
return ctx, errorsmod.Wrapf(errortypes.ErrUnknownRequest, "invalid message type %T, expected %T", msg, (*evmtypes.MsgEthereumTx)(nil))
|
|
}
|
|
|
|
allowUnprotectedTxs := esvd.evmKeeper.GetAllowUnprotectedTxs(ctx)
|
|
ethTx := msgEthTx.AsTransaction()
|
|
if !allowUnprotectedTxs && !ethTx.Protected() {
|
|
return ctx, errorsmod.Wrapf(
|
|
errortypes.ErrNotSupported,
|
|
"rejected unprotected Ethereum transaction. Please EIP155 sign your transaction to protect it against replay-attacks")
|
|
}
|
|
|
|
sender, err := signer.Sender(ethTx)
|
|
if err != nil {
|
|
return ctx, errorsmod.Wrapf(
|
|
errortypes.ErrorInvalidSigner,
|
|
"couldn't retrieve sender address from the ethereum transaction: %s",
|
|
err.Error(),
|
|
)
|
|
}
|
|
|
|
// set up the sender to the transaction field if not already
|
|
msgEthTx.From = sender.Hex()
|
|
}
|
|
|
|
return next(ctx, tx, simulate)
|
|
}
|