func (esvd EthSigVerificationDecorator) AnteHandle(
	ctx sdk.Context, tx sdk.Tx, simulate bool, next sdk.AnteHandler,
) (newCtx sdk.Context, err error) {
	chainID := esvd.evmKeeper.EthChainID(ctx)
	ethCfg := evm.EthereumConfig(chainID)
	blockNum := big.NewInt(ctx.BlockHeight())
	signer := gethcore.MakeSigner(ethCfg, blockNum)

	for _, msg := range tx.GetMsgs() {
		msgEthTx, ok := msg.(*evm.MsgEthereumTx)
		if !ok {
			return ctx, errors.Wrapf(
				sdkerrors.ErrUnknownRequest,
				"invalid message type %T, expected %T", msg, (*evm.MsgEthereumTx)(nil),
			)
		}

		allowUnprotectedTxs := false
		ethTx := msgEthTx.AsTransaction()
		if !allowUnprotectedTxs && !ethTx.Protected() {
			return ctx, errors.Wrapf(
				sdkerrors.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, errors.Wrapf(
				sdkerrors.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)
}
func (esvd EthSigVerificationDecorator) AnteHandle(
	ctx sdk.Context, tx sdk.Tx, simulate bool, next sdk.AnteHandler,
) (newCtx sdk.Context, err error) {
	chainID := esvd.evmKeeper.EthChainID(ctx)
	ethCfg := evm.EthereumConfig(chainID)
	blockNum := big.NewInt(ctx.BlockHeight())
	signer := gethcore.MakeSigner(ethCfg, blockNum)

	for _, msg := range tx.GetMsgs() {
		msgEthTx, ok := msg.(*evm.MsgEthereumTx)
		if !ok {
			return ctx, errors.Wrapf(
				sdkerrors.ErrUnknownRequest,
				"invalid message type %T, expected %T", msg, (*evm.MsgEthereumTx)(nil),
			)
		}

-		allowUnprotectedTxs := false
		ethTx := msgEthTx.AsTransaction()
-		if !allowUnprotectedTxs && !ethTx.Protected() {
+		if !ethTx.Protected() {
			return ctx, errors.Wrapf(
				sdkerrors.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, errors.Wrapf(
				sdkerrors.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)
}
