/
ante.go
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/
ante.go
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// 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/xpladev/ethermint/blob/main/LICENSE
package ante
import (
"fmt"
"runtime/debug"
tmlog "github.com/cometbft/cometbft/libs/log"
errorsmod "cosmossdk.io/errors"
"github.com/cosmos/cosmos-sdk/crypto/types/multisig"
sdk "github.com/cosmos/cosmos-sdk/types"
errortypes "github.com/cosmos/cosmos-sdk/types/errors"
"github.com/cosmos/cosmos-sdk/types/tx/signing"
authante "github.com/cosmos/cosmos-sdk/x/auth/ante"
authtypes "github.com/cosmos/cosmos-sdk/x/auth/types"
"github.com/xpladev/ethermint/crypto/ethsecp256k1"
)
const (
secp256k1VerifyCost uint64 = 21000
)
// 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, error) {
if err := options.validate(); err != nil {
return nil, err
}
return func(
ctx sdk.Context, tx sdk.Tx, sim bool,
) (newCtx sdk.Context, err error) {
var anteHandler sdk.AnteHandler
defer Recover(ctx.Logger(), &err)
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 = newEthAnteHandler(options)
case "/ethermint.types.v1.ExtensionOptionsWeb3Tx":
// Deprecated: Handle as normal Cosmos SDK tx, except signature is checked for Legacy 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)
}, nil
}
func Recover(logger tmlog.Logger, err *error) {
if r := recover(); r != nil {
*err = errorsmod.Wrapf(errortypes.ErrPanic, "%v", r)
if e, ok := r.(error); ok {
logger.Error(
"ante handler panicked",
"error", e,
"stack trace", string(debug.Stack()),
)
} else {
logger.Error(
"ante handler panicked",
"recover", fmt.Sprintf("%v", r),
)
}
}
}
var _ authante.SignatureVerificationGasConsumer = DefaultSigVerificationGasConsumer
// DefaultSigVerificationGasConsumer is the default implementation of SignatureVerificationGasConsumer. It consumes gas
// for signature verification based upon the public key type. The cost is fetched from the given params and is matched
// by the concrete type.
func DefaultSigVerificationGasConsumer(
meter sdk.GasMeter, sig signing.SignatureV2, params authtypes.Params,
) error {
pubkey := sig.PubKey
switch pubkey := pubkey.(type) {
case *ethsecp256k1.PubKey:
meter.ConsumeGas(secp256k1VerifyCost, "ante verify: eth_secp256k1")
return nil
case multisig.PubKey:
// Multisig keys
multisignature, ok := sig.Data.(*signing.MultiSignatureData)
if !ok {
return fmt.Errorf("expected %T, got, %T", &signing.MultiSignatureData{}, sig.Data)
}
return ConsumeMultisignatureVerificationGas(meter, multisignature, pubkey, params, sig.Sequence)
default:
return authante.DefaultSigVerificationGasConsumer(meter, sig, params)
}
}
// ConsumeMultisignatureVerificationGas consumes gas from a GasMeter for verifying a multisig pubkey signature
func ConsumeMultisignatureVerificationGas(
meter sdk.GasMeter, sig *signing.MultiSignatureData, pubkey multisig.PubKey,
params authtypes.Params, accSeq uint64,
) error {
size := sig.BitArray.Count()
sigIndex := 0
for i := 0; i < size; i++ {
if !sig.BitArray.GetIndex(i) {
continue
}
sigV2 := signing.SignatureV2{
PubKey: pubkey.GetPubKeys()[i],
Data: sig.Signatures[sigIndex],
Sequence: accSeq,
}
err := DefaultSigVerificationGasConsumer(meter, sigV2, params)
if err != nil {
return err
}
sigIndex++
}
return nil
}