42 lines
1.7 KiB
Go
42 lines
1.7 KiB
Go
// Copyright 2021 Evmos Foundation
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// This file is part of Evmos' Ethermint library.
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//
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// The Ethermint library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The Ethermint library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the Ethermint library. If not, see https://github.com/evmos/ethermint/blob/main/LICENSE
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package ante
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import (
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errorsmod "cosmossdk.io/errors"
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sdk "github.com/cosmos/cosmos-sdk/types"
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errortypes "github.com/cosmos/cosmos-sdk/types/errors"
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evmtypes "github.com/evmos/ethermint/x/evm/types"
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)
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// RejectMessagesDecorator prevents invalid msg types from being executed
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type RejectMessagesDecorator struct{}
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// AnteHandle rejects messages that requires ethereum-specific authentication.
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// For example `MsgEthereumTx` requires fee to be deducted in the antehandler in
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// order to perform the refund.
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func (rmd RejectMessagesDecorator) AnteHandle(ctx sdk.Context, tx sdk.Tx, simulate bool, next sdk.AnteHandler) (newCtx sdk.Context, err error) {
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for _, msg := range tx.GetMsgs() {
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if _, ok := msg.(*evmtypes.MsgEthereumTx); ok {
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return ctx, errorsmod.Wrapf(
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errortypes.ErrInvalidType,
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"MsgEthereumTx needs to be contained within a tx with 'ExtensionOptionsEthereumTx' option",
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)
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}
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}
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return next(ctx, tx, simulate)
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}
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