Check EnableCreate/EnableCall in ante handler

WIP: evmos#1045

Reject tx early in ante handler, avoid deduct user fee for vain.

CHANGELOG.md

@@ -50,6 +50,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 ### Improvements
 
 * (ci, evm) [tharsis#1063](https:/tharsis/ethermint/pull/1063) Run simulations on CI.
+* (ante) [tharsis#1060](https:/tharsis/ethermint/pull/1060) Check EnableCreate/EnableCall in ante handler.
 
 ### Bug Fixes
 

app/ante/eth.go

@@ -410,22 +410,31 @@ func (vbd EthValidateBasicDecorator) AnteHandle(ctx sdk.Context, tx sdk.Tx, simu
  txFee := sdk.Coins{}
  txGasLimit := uint64(0)
 
+ params := vbd.evmKeeper.GetParams(ctx)
+ chainID := vbd.evmKeeper.ChainID()
+ ethCfg := params.ChainConfig.EthereumConfig(chainID)
+ baseFee := vbd.evmKeeper.GetBaseFee(ctx, ethCfg)
+
  for _, msg := range protoTx.GetMsgs() {
  msgEthTx, ok := msg.(*evmtypes.MsgEthereumTx)
  if !ok {
  return ctx, sdkerrors.Wrapf(sdkerrors.ErrUnknownRequest, "invalid message type %T, expected %T", msg, (*evmtypes.MsgEthereumTx)(nil))
  }
+
  txGasLimit += msgEthTx.GetGas()
 
  txData, err := evmtypes.UnpackTxData(msgEthTx.Data)
  if err != nil {
  return ctx, sdkerrors.Wrap(err, "failed to unpack MsgEthereumTx Data")
  }
 
- params := vbd.evmKeeper.GetParams(ctx)
- chainID := vbd.evmKeeper.ChainID()
- ethCfg := params.ChainConfig.EthereumConfig(chainID)
- baseFee := vbd.evmKeeper.GetBaseFee(ctx, ethCfg)
+ // return error if contract creation or call are disabled through governance
+ if !params.EnableCreate && txData.GetTo() == nil {
+ return ctx, sdkerrors.Wrap(evmtypes.ErrCreateDisabled, "failed to create new contract")
+ } else if !params.EnableCall && txData.GetTo() != nil {
+ return ctx, sdkerrors.Wrap(evmtypes.ErrCallDisabled, "failed to call contract")
+ }
+
  if baseFee == nil && txData.TxType() == ethtypes.DynamicFeeTxType {
  return ctx, sdkerrors.Wrap(ethtypes.ErrTxTypeNotSupported, "dynamic fee tx not supported")
  }