laconicd-deprecated/app/ante/ante.go
Federico Kunze 5b2f068a03
ante: switch ethAnteHandler to use AnteDecorators (#252)
* ante: switch ethAnteHandler to use AnteDecorators

* ante: cleanup panic recover, update MsgEthereumTx GetSigners

* ante: remove EthIntrinsicGasDecorator in favor of EthGasConsumeDecorator

* migrate errors
2020-04-17 18:32:01 -04:00

82 lines
3.0 KiB
Go

package ante
import (
sdk "github.com/cosmos/cosmos-sdk/types"
sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
"github.com/cosmos/cosmos-sdk/x/auth"
authante "github.com/cosmos/cosmos-sdk/x/auth/ante"
"github.com/cosmos/cosmos-sdk/x/auth/types"
"github.com/cosmos/ethermint/crypto"
evmtypes "github.com/cosmos/ethermint/x/evm/types"
tmcrypto "github.com/tendermint/tendermint/crypto"
)
const (
// TODO: Use this cost per byte through parameter or overriding NewConsumeGasForTxSizeDecorator
// which currently defaults at 10, if intended
// memoCostPerByte sdk.Gas = 3
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(ak auth.AccountKeeper, sk types.SupplyKeeper) sdk.AnteHandler {
return func(
ctx sdk.Context, tx sdk.Tx, sim bool,
) (newCtx sdk.Context, err error) {
var anteHandler sdk.AnteHandler
switch tx.(type) {
case auth.StdTx:
anteHandler = sdk.ChainAnteDecorators(
authante.NewSetUpContextDecorator(), // outermost AnteDecorator. SetUpContext must be called first
authante.NewMempoolFeeDecorator(),
authante.NewValidateBasicDecorator(),
authante.NewValidateMemoDecorator(ak),
authante.NewConsumeGasForTxSizeDecorator(ak),
authante.NewSetPubKeyDecorator(ak), // SetPubKeyDecorator must be called before all signature verification decorators
authante.NewValidateSigCountDecorator(ak),
authante.NewDeductFeeDecorator(ak, sk),
authante.NewSigGasConsumeDecorator(ak, sigGasConsumer),
authante.NewSigVerificationDecorator(ak),
authante.NewIncrementSequenceDecorator(ak), // innermost AnteDecorator
)
case evmtypes.MsgEthereumTx:
anteHandler = sdk.ChainAnteDecorators(
NewEthSetupContextDecorator(), // outermost AnteDecorator. EthSetUpContext must be called first
NewEthMempoolFeeDecorator(),
NewEthSigVerificationDecorator(),
NewAccountVerificationDecorator(ak),
NewNonceVerificationDecorator(ak),
NewEthGasConsumeDecorator(ak, sk),
NewIncrementSenderSequenceDecorator(ak), // innermost AnteDecorator.
)
default:
return ctx, sdkerrors.Wrapf(sdkerrors.ErrUnknownRequest, "invalid transaction type: %T", tx)
}
return anteHandler(ctx, tx, sim)
}
}
// sigGasConsumer overrides the DefaultSigVerificationGasConsumer from the x/auth
// module on the SDK. It doesn't allow ed25519 nor multisig thresholds.
func sigGasConsumer(
meter sdk.GasMeter, sig []byte, pubkey tmcrypto.PubKey, params types.Params,
) error {
switch pubkey.(type) {
case crypto.PubKeySecp256k1:
meter.ConsumeGas(secp256k1VerifyCost, "ante verify: secp256k1")
return nil
case tmcrypto.PubKey:
meter.ConsumeGas(secp256k1VerifyCost, "ante verify: tendermint secp256k1")
return nil
default:
return sdkerrors.Wrapf(sdkerrors.ErrInvalidPubKey, "unrecognized public key type: %T", pubkey)
}
}