laconicd/app/ante/ante.go
Guillermo Paoletti 3bea3fa1ef
ante: EIP712 support (#950)
* code migrated

* signed_data ported to avoid conficting dependency

* correct payload

* eip712 working with evmos.me

* use geth TypedData types

* fix linter

* minor refactor

* test first try

* fix test

* fix tests

* enforce fee delegated eip712

* verify signature refactor

* SignedTypedData api refactor

* add AnteHandler test for EIP712

* remove comment

* code clean up

* return more detailed error messages

* fix linter

* remove unnecesary global vars

* Update app/ante/eip712.go

Co-authored-by: Federico Kunze Küllmer <31522760+fedekunze@users.noreply.github.com>

* fix pr comments

* remove hardcoded value

* add more tests

* add changelog

* use sdk errors

* add MsgDelegate test

Co-authored-by: Freddy Caceres <freddy.caceres@crypto.com>
Co-authored-by: Federico Kunze Küllmer <federico.kunze94@gmail.com>
Co-authored-by: Federico Kunze Küllmer <31522760+fedekunze@users.noreply.github.com>
Co-authored-by: crypto-facs <84574577+crypto-facs@users.noreply.github.com>
2022-02-26 16:34:43 +00:00

104 lines
3.1 KiB
Go

package ante
import (
"fmt"
"runtime/debug"
tmlog "github.com/tendermint/tendermint/libs/log"
sdk "github.com/cosmos/cosmos-sdk/types"
sdkerrors "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/tharsis/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 {
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":
// handle as normal Cosmos SDK tx, except signature is checked for EIP712 representation
anteHandler = newCosmosAnteHandlerEip712(options)
default:
return ctx, sdkerrors.Wrapf(
sdkerrors.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, sdkerrors.Wrapf(sdkerrors.ErrUnknownRequest, "invalid transaction type: %T", tx)
}
return anteHandler(ctx, tx, sim)
}
}
func Recover(logger tmlog.Logger, err *error) {
if r := recover(); r != nil {
*err = sdkerrors.Wrapf(sdkerrors.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 {
// support for ethereum ECDSA secp256k1 keys
_, ok := sig.PubKey.(*ethsecp256k1.PubKey)
if ok {
meter.ConsumeGas(secp256k1VerifyCost, "ante verify: eth_secp256k1")
return nil
}
return authante.DefaultSigVerificationGasConsumer(meter, sig, params)
}