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ante.go
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ante.go
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// Copyright 2022 Match Foundation
// This file is part of the Match Network packages.
//
// Match 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 Match packages are 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 Match packages. If not, see https://github.com/matchain/match/blob/main/LICENSE
package ante
import (
errorsmod "cosmossdk.io/errors"
sdk "github.com/cosmos/cosmos-sdk/types"
errortypes "github.com/cosmos/cosmos-sdk/types/errors"
authante "github.com/cosmos/cosmos-sdk/x/auth/ante"
)
// NewAnteHandler returns an ante handler responsible for attempting to route an
// Ethereum or SDK transaction to an internal ante handler for performing
// transaction-level processing (e.g. fee payment, signature verification) before
// being passed onto it's respective handler.
func NewAnteHandler(options HandlerOptions) sdk.AnteHandler {
return func(
ctx sdk.Context, tx sdk.Tx, sim bool,
) (newCtx sdk.Context, err error) {
var anteHandler sdk.AnteHandler
txWithExtensions, ok := tx.(authante.HasExtensionOptionsTx)
if ok {
opts := txWithExtensions.GetExtensionOptions()
if len(opts) > 0 {
switch typeURL := opts[0].GetTypeUrl(); typeURL {
case "/ethermint.evm.v1.ExtensionOptionsEthereumTx":
// handle as *evmtypes.MsgEthereumTx
anteHandler = newEVMAnteHandler(options)
case "/ethermint.types.v1.ExtensionOptionsWeb3Tx":
// handle as normal Cosmos SDK tx, except signature is checked for EIP712 representation
anteHandler = newLegacyCosmosAnteHandlerEip712(options)
case "/ethermint.types.v1.ExtensionOptionDynamicFeeTx":
// cosmos-sdk tx with dynamic fee extension
anteHandler = newCosmosAnteHandler(options)
default:
return ctx, errorsmod.Wrapf(
errortypes.ErrUnknownExtensionOptions,
"rejecting tx with unsupported extension option: %s", typeURL,
)
}
return anteHandler(ctx, tx, sim)
}
}
// handle as totally normal Cosmos SDK tx
switch tx.(type) {
case sdk.Tx:
anteHandler = newCosmosAnteHandler(options)
default:
return ctx, errorsmod.Wrapf(errortypes.ErrUnknownRequest, "invalid transaction type: %T", tx)
}
return anteHandler(ctx, tx, sim)
}
}