laconicd/app/ante/ante.go

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package ante
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import (
"fmt"
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"runtime/debug"
tmlog "github.com/tendermint/tendermint/libs/log"
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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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channelkeeper "github.com/cosmos/ibc-go/v2/modules/core/04-channel/keeper"
ibcante "github.com/cosmos/ibc-go/v2/modules/core/ante"
"github.com/tharsis/ethermint/crypto/ethsecp256k1"
evmtypes "github.com/tharsis/ethermint/x/evm/types"
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)
const (
secp256k1VerifyCost uint64 = 21000
)
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// 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(
ak evmtypes.AccountKeeper,
bankKeeper evmtypes.BankKeeper,
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evmKeeper EVMKeeper,
feeGrantKeeper authante.FeegrantKeeper,
channelKeeper channelkeeper.Keeper,
feeMarketKeeper evmtypes.FeeMarketKeeper,
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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(ctx.Logger(), &err)
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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":
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// handle as *evmtypes.MsgEthereumTx
anteHandler = sdk.ChainAnteDecorators(
NewEthSetUpContextDecorator(), // outermost AnteDecorator. SetUpContext must be called first
NewEthMempoolFeeDecorator(evmKeeper, feeMarketKeeper), // Check eth effective gas price against minimal-gas-prices
NewEthValidateBasicDecorator(evmKeeper),
NewEthSigVerificationDecorator(evmKeeper),
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NewEthAccountVerificationDecorator(ak, bankKeeper, evmKeeper),
NewEthNonceVerificationDecorator(ak),
NewEthGasConsumeDecorator(evmKeeper),
NewCanTransferDecorator(evmKeeper, feeMarketKeeper),
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NewEthIncrementSenderSequenceDecorator(ak), // innermost AnteDecorator.
)
default:
return ctx, sdkerrors.Wrapf(
sdkerrors.ErrUnknownExtensionOptions,
"rejecting tx with unsupported extension option: %s",
typeURL,
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)
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}
return anteHandler(ctx, tx, sim)
}
}
// Reject messages that requires specific authentication here.
// For example `MsgEthereumTx` requires fee to be deducted in the antehandler in order to perform the refund.
for _, msg := range tx.GetMsgs() {
if _, ok := msg.(*evmtypes.MsgEthereumTx); ok {
return ctx, sdkerrors.Wrapf(
sdkerrors.ErrInvalidType,
"MsgEthereumTx needs to be contained within a tx with ExtensionOptionsEthereumTx option",
)
}
}
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// 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(),
authante.NewTxTimeoutHeightDecorator(),
authante.NewValidateMemoDecorator(ak),
ibcante.NewAnteDecorator(channelKeeper),
authante.NewConsumeGasForTxSizeDecorator(ak),
authante.NewSetPubKeyDecorator(ak), // SetPubKeyDecorator must be called before all signature verification decorators
authante.NewValidateSigCountDecorator(ak),
authante.NewDeductFeeDecorator(ak, bankKeeper, feeGrantKeeper),
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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)
}
}
func Recover(logger tmlog.Logger, err *error) {
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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()),
)
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} else {
logger.Error(
"ante handler panicked",
"recover", fmt.Sprintf("%v", r),
)
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}
}
}
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)
}