laconicd/app/ante/ante.go

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package ante
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import (
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"runtime/debug"
log "github.com/xlab/suplog"
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sdk "github.com/cosmos/cosmos-sdk/types"
sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
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"github.com/cosmos/cosmos-sdk/types/tx/signing"
authante "github.com/cosmos/cosmos-sdk/x/auth/ante"
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authsigning "github.com/cosmos/cosmos-sdk/x/auth/signing"
authtypes "github.com/cosmos/cosmos-sdk/x/auth/types"
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"github.com/cosmos/ethermint/crypto/ethsecp256k1"
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)
const (
secp256k1VerifyCost uint64 = 21000
)
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// AccountKeeper defines an expected keeper interface for the auth module's AccountKeeper
type AccountKeeper interface {
authante.AccountKeeper
NewAccountWithAddress(ctx sdk.Context, addr sdk.AccAddress) authtypes.AccountI
GetSequence(sdk.Context, sdk.AccAddress) (uint64, error)
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}
// BankKeeper defines an expected keeper interface for the bank module's Keeper
type BankKeeper interface {
authtypes.BankKeeper
GetBalance(ctx sdk.Context, addr sdk.AccAddress, denom string) sdk.Coin
SetBalance(ctx sdk.Context, addr sdk.AccAddress, balance sdk.Coin) error
}
// NewAnteHandler returns an ante handler responsible for attempting to route an
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// 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.
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func NewAnteHandler(
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ak AccountKeeper,
bankKeeper BankKeeper,
evmKeeper EVMKeeper,
signModeHandler authsigning.SignModeHandler,
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) sdk.AnteHandler {
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return func(
ctx sdk.Context, tx sdk.Tx, sim bool,
) (newCtx sdk.Context, err error) {
var anteHandler sdk.AnteHandler
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defer Recover(&err)
txWithExtensions, ok := tx.(authante.HasExtensionOptionsTx)
if ok {
opts := txWithExtensions.GetExtensionOptions()
if len(opts) > 0 {
switch typeURL := opts[0].GetTypeUrl(); typeURL {
case "/ethermint.evm.v1alpha1.ExtensionOptionsEthereumTx":
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// handle as *evmtypes.MsgEthereumTx
anteHandler = sdk.ChainAnteDecorators(
authante.NewSetUpContextDecorator(), // outermost AnteDecorator. SetUpContext must be called first
authante.NewMempoolFeeDecorator(),
authante.NewValidateBasicDecorator(),
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authante.TxTimeoutHeightDecorator{},
NewEthSigVerificationDecorator(evmKeeper),
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NewEthAccountVerificationDecorator(ak, bankKeeper, evmKeeper),
NewEthNonceVerificationDecorator(ak),
NewEthGasConsumeDecorator(ak, bankKeeper, evmKeeper),
NewCanTransferDecorator(evmKeeper),
NewAccessListDecorator(evmKeeper),
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NewEthIncrementSenderSequenceDecorator(ak), // innermost AnteDecorator.
)
default:
log.WithField("type_url", typeURL).Errorln("rejecting tx with unsupported extension option")
return ctx, sdkerrors.Wrap(sdkerrors.ErrUnknownExtensionOptions, typeURL)
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}
return anteHandler(ctx, tx, sim)
}
}
// handle as totally normal Cosmos SDK tx
switch tx.(type) {
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case sdk.Tx:
anteHandler = sdk.ChainAnteDecorators(
authante.NewSetUpContextDecorator(), // outermost AnteDecorator. SetUpContext must be called first
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authante.NewRejectExtensionOptionsDecorator(),
authante.NewMempoolFeeDecorator(),
authante.NewValidateBasicDecorator(),
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authante.TxTimeoutHeightDecorator{},
authante.NewValidateMemoDecorator(ak),
authante.NewConsumeGasForTxSizeDecorator(ak),
authante.NewRejectFeeGranterDecorator(),
authante.NewSetPubKeyDecorator(ak), // SetPubKeyDecorator must be called before all signature verification decorators
authante.NewValidateSigCountDecorator(ak),
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authante.NewDeductFeeDecorator(ak, bankKeeper),
authante.NewSigGasConsumeDecorator(ak, DefaultSigVerificationGasConsumer),
authante.NewSigVerificationDecorator(ak, signModeHandler),
authante.NewIncrementSequenceDecorator(ak), // innermost AnteDecorator
)
default:
return ctx, sdkerrors.Wrapf(sdkerrors.ErrUnknownRequest, "invalid transaction type: %T", tx)
}
return anteHandler(ctx, tx, sim)
}
}
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func Recover(err *error) {
if r := recover(); r != nil {
*err = sdkerrors.Wrapf(sdkerrors.ErrPanic, "%v", r)
if e, ok := r.(error); ok {
log.WithError(e).Errorln("ante handler panicked with an error")
log.Debugln(string(debug.Stack()))
} else {
log.Errorln(r)
}
}
}
var _ authante.SignatureVerificationGasConsumer = DefaultSigVerificationGasConsumer
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// 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 {
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// support for ethereum ECDSA secp256k1 keys
_, ok := sig.PubKey.(*ethsecp256k1.PubKey)
if ok {
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meter.ConsumeGas(secp256k1VerifyCost, "ante verify: eth_secp256k1")
return nil
}
return authante.DefaultSigVerificationGasConsumer(meter, sig, params)
}