forked from cerc-io/laconicd-deprecated
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
This commit is contained in:
Federico Kunze
GitHub
parent
c30205cae9
commit
5b2f068a03
261
app/ante/ante.go
261
app/ante/ante.go
@ -1,9 +1,6 @@
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package ante
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import (
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"fmt"
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"math/big"
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sdk "github.com/cosmos/cosmos-sdk/types"
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sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
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"github.com/cosmos/cosmos-sdk/x/auth"
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@ -11,11 +8,8 @@ import (
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"github.com/cosmos/cosmos-sdk/x/auth/types"
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"github.com/cosmos/ethermint/crypto"
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emint "github.com/cosmos/ethermint/types"
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evmtypes "github.com/cosmos/ethermint/x/evm/types"
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ethcore "github.com/ethereum/go-ethereum/core"
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tmcrypto "github.com/tendermint/tendermint/crypto"
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)
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@ -34,10 +28,10 @@ func NewAnteHandler(ak auth.AccountKeeper, sk types.SupplyKeeper) sdk.AnteHandle
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return func(
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ctx sdk.Context, tx sdk.Tx, sim bool,
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) (newCtx sdk.Context, err error) {
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switch castTx := tx.(type) {
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var anteHandler sdk.AnteHandler
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switch tx.(type) {
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case auth.StdTx:
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stdAnte := sdk.ChainAnteDecorators(
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anteHandler = sdk.ChainAnteDecorators(
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authante.NewSetUpContextDecorator(), // outermost AnteDecorator. SetUpContext must be called first
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authante.NewMempoolFeeDecorator(),
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authante.NewValidateBasicDecorator(),
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@ -51,14 +45,21 @@ func NewAnteHandler(ak auth.AccountKeeper, sk types.SupplyKeeper) sdk.AnteHandle
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authante.NewIncrementSequenceDecorator(ak), // innermost AnteDecorator
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)
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return stdAnte(ctx, tx, sim)
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case evmtypes.MsgEthereumTx:
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return ethAnteHandler(ctx, ak, sk, &castTx, sim)
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anteHandler = sdk.ChainAnteDecorators(
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NewEthSetupContextDecorator(), // outermost AnteDecorator. EthSetUpContext must be called first
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NewEthMempoolFeeDecorator(),
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NewEthSigVerificationDecorator(),
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NewAccountVerificationDecorator(ak),
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NewNonceVerificationDecorator(ak),
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NewEthGasConsumeDecorator(ak, sk),
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NewIncrementSenderSequenceDecorator(ak), // innermost AnteDecorator.
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)
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default:
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return ctx, sdkerrors.Wrapf(sdkerrors.ErrUnknownRequest, "invalid transaction type: %T", tx)
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}
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return anteHandler(ctx, tx, sim)
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}
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}
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@ -78,237 +79,3 @@ func sigGasConsumer(
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return sdkerrors.Wrapf(sdkerrors.ErrInvalidPubKey, "unrecognized public key type: %T", pubkey)
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}
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}
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// ----------------------------------------------------------------------------
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// Ethereum Ante Handler
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// ethAnteHandler defines an internal ante handler for an Ethereum transaction
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// ethTxMsg. During CheckTx, the transaction is passed through a series of
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// pre-message execution validation checks such as signature and account
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// verification in addition to minimum fees being checked. Otherwise, during
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// DeliverTx, the transaction is simply passed to the EVM which will also
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// perform the same series of checks. The distinction is made in CheckTx to
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// prevent spam and DoS attacks.
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func ethAnteHandler(
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ctx sdk.Context, ak auth.AccountKeeper, sk types.SupplyKeeper,
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ethTxMsg *evmtypes.MsgEthereumTx, sim bool,
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) (newCtx sdk.Context, err error) {
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var senderAddr sdk.AccAddress
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// This is done to ignore costs in Ante handler checks
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ctx = ctx.WithBlockGasMeter(sdk.NewInfiniteGasMeter())
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if ctx.IsCheckTx() {
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// Only perform pre-message (Ethereum transaction) execution validation
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// during CheckTx. Otherwise, during DeliverTx the EVM will handle them.
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if senderAddr, err = validateEthTxCheckTx(ctx, ak, ethTxMsg); err != nil {
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return ctx, err
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}
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} else {
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// This is still currently needed to retrieve the sender address
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if senderAddr, err = validateSignature(ctx, ethTxMsg); err != nil {
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return ctx, err
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}
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// Explicit nonce check is also needed in case of multiple txs with same nonce not being handled
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if err := checkNonce(ctx, ak, ethTxMsg, senderAddr); err != nil {
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return ctx, err
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}
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}
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// Recover and catch out of gas error
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defer func() {
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if r := recover(); r != nil {
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switch rType := r.(type) {
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case sdk.ErrorOutOfGas:
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err = sdkerrors.Wrapf(
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sdkerrors.ErrOutOfGas,
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"out of gas in location: %v; gasUsed: %d",
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rType.Descriptor, ctx.GasMeter().GasConsumed(),
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)
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default:
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panic(r)
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}
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}
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}()
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// Fetch sender account from signature
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senderAcc, err := auth.GetSignerAcc(ctx, ak, senderAddr)
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if err != nil {
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return ctx, err
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}
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// Charge sender for gas up to limit
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if ethTxMsg.Data.GasLimit != 0 {
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// Cost calculates the fees paid to validators based on gas limit and price
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cost := new(big.Int).Mul(ethTxMsg.Data.Price, new(big.Int).SetUint64(ethTxMsg.Data.GasLimit))
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feeAmt := sdk.NewCoins(
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sdk.NewCoin(emint.DenomDefault, sdk.NewIntFromBigInt(cost)),
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)
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err = auth.DeductFees(sk, ctx, senderAcc, feeAmt)
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if err != nil {
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return ctx, err
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}
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}
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// Set gas meter after ante handler to ignore gaskv costs
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newCtx = auth.SetGasMeter(sim, ctx, ethTxMsg.Data.GasLimit)
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gas, _ := ethcore.IntrinsicGas(ethTxMsg.Data.Payload, ethTxMsg.To() == nil, true)
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newCtx.GasMeter().ConsumeGas(gas, "eth intrinsic gas")
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// Increment sequence of sender
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acc := ak.GetAccount(ctx, senderAddr)
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if err := acc.SetSequence(acc.GetSequence() + 1); err != nil {
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panic(err)
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}
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ak.SetAccount(ctx, acc)
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return newCtx, nil
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}
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func validateEthTxCheckTx(
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ctx sdk.Context, ak auth.AccountKeeper, ethTxMsg *evmtypes.MsgEthereumTx,
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) (sdk.AccAddress, error) {
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// Validate sufficient fees have been provided that meet a minimum threshold
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// defined by the proposer (for mempool purposes during CheckTx).
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if err := ensureSufficientMempoolFees(ctx, ethTxMsg); err != nil {
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return nil, err
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}
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// validate enough intrinsic gas
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if err := validateIntrinsicGas(ethTxMsg); err != nil {
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return nil, err
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}
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signer, err := validateSignature(ctx, ethTxMsg)
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if err != nil {
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return nil, err
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}
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// validate account (nonce and balance checks)
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if err := validateAccount(ctx, ak, ethTxMsg, signer); err != nil {
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return nil, err
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}
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return sdk.AccAddress(signer.Bytes()), nil
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}
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// Validates signature and returns sender address
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func validateSignature(ctx sdk.Context, ethTxMsg *evmtypes.MsgEthereumTx) (sdk.AccAddress, error) {
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// parse the chainID from a string to a base-10 integer
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chainID, ok := new(big.Int).SetString(ctx.ChainID(), 10)
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if !ok {
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return nil, sdkerrors.Wrap(emint.ErrInvalidChainID, ctx.ChainID())
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}
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// validate sender/signature
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signer, err := ethTxMsg.VerifySig(chainID)
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if err != nil {
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return nil, sdkerrors.Wrap(err, "signature verification failed")
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}
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return sdk.AccAddress(signer.Bytes()), nil
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}
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// validateIntrinsicGas validates that the Ethereum tx message has enough to
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// cover intrinsic gas. Intrinsic gas for a transaction is the amount of gas
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// that the transaction uses before the transaction is executed. The gas is a
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// constant value of 21000 plus any cost inccured by additional bytes of data
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// supplied with the transaction.
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func validateIntrinsicGas(ethTxMsg *evmtypes.MsgEthereumTx) error {
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gas, err := ethcore.IntrinsicGas(ethTxMsg.Data.Payload, ethTxMsg.To() == nil, true)
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if err != nil {
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return sdkerrors.Wrap(err, "failed to compute intrinsic gas cost")
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}
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if ethTxMsg.Data.GasLimit < gas {
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return fmt.Errorf(
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"intrinsic gas too low: %d < %d", ethTxMsg.Data.GasLimit, gas,
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)
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}
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return nil
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}
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// validateAccount validates the account nonce and that the account has enough
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// funds to cover the tx cost.
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func validateAccount(
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ctx sdk.Context, ak auth.AccountKeeper, ethTxMsg *evmtypes.MsgEthereumTx, signer sdk.AccAddress,
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) error {
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acc := ak.GetAccount(ctx, signer)
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// on InitChain make sure account number == 0
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if ctx.BlockHeight() == 0 && acc.GetAccountNumber() != 0 {
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return sdkerrors.Wrapf(
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sdkerrors.ErrInvalidSequence,
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"invalid account number for height zero (got %d)", acc.GetAccountNumber(),
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)
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}
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// Validate nonce is correct
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if err := checkNonce(ctx, ak, ethTxMsg, signer); err != nil {
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return err
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}
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// validate sender has enough funds
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balance := acc.GetCoins().AmountOf(emint.DenomDefault)
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if balance.BigInt().Cmp(ethTxMsg.Cost()) < 0 {
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return sdkerrors.Wrapf(
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sdkerrors.ErrInsufficientFunds,
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"%s < %s%s", balance.String(), ethTxMsg.Cost().String(), emint.DenomDefault,
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)
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}
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return nil
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}
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func checkNonce(
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ctx sdk.Context, ak auth.AccountKeeper, ethTxMsg *evmtypes.MsgEthereumTx, signer sdk.AccAddress,
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) error {
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acc := ak.GetAccount(ctx, signer)
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// Validate the transaction nonce is valid (equivalent to the sender account’s
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// current nonce).
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seq := acc.GetSequence()
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if ethTxMsg.Data.AccountNonce != seq {
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return sdkerrors.Wrapf(
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sdkerrors.ErrInvalidSequence,
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"got nonce %d, expected %d", ethTxMsg.Data.AccountNonce, seq,
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)
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}
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return nil
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}
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// ensureSufficientMempoolFees verifies that enough fees have been provided by the
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// Ethereum transaction that meet the minimum threshold set by the block
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// proposer.
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//
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// NOTE: This should only be ran during a CheckTx mode.
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func ensureSufficientMempoolFees(ctx sdk.Context, ethTxMsg *evmtypes.MsgEthereumTx) error {
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// fee = GP * GL
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fee := sdk.NewDecCoinFromCoin(sdk.NewInt64Coin(emint.DenomDefault, ethTxMsg.Fee().Int64()))
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minGasPrices := ctx.MinGasPrices()
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allGTE := true
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for _, v := range minGasPrices {
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if !fee.IsGTE(v) {
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allGTE = false
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}
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}
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// it is assumed that the minimum fees will only include the single valid denom
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if !ctx.MinGasPrices().IsZero() && !allGTE {
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// reject the transaction that does not meet the minimum fee
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return sdkerrors.Wrapf(
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sdkerrors.ErrInsufficientFee,
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"got: %q required: %q", fee, ctx.MinGasPrices(),
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)
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}
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return nil
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}
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@ -55,7 +55,7 @@ func (suite *AnteTestSuite) TestValidEthTx() {
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to := ethcmn.BytesToAddress(addr2.Bytes())
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amt := big.NewInt(32)
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gas := big.NewInt(20)
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ethMsg := evmtypes.NewMsgEthereumTx(0, &to, amt, 22000, gas, []byte("test"))
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ethMsg := evmtypes.NewMsgEthereumTx(0, &to, amt, 34910, gas, []byte("test"))
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tx := newTestEthTx(suite.ctx, ethMsg, priv1)
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requireValidTx(suite.T(), suite.anteHandler, suite.ctx, tx, false)
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11
app/ante/doc.go
Normal file
11
app/ante/doc.go
Normal file
@ -0,0 +1,11 @@
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/*Package ante defines the SDK auth module's AnteHandler as well as an internal
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AnteHandler for an Ethereum transaction (i.e MsgEthereumTx).
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During CheckTx, the transaction is passed through a series of
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pre-message execution validation checks such as signature and account
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verification in addition to minimum fees being checked. Otherwise, during
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DeliverTx, the transaction is simply passed to the EVM which will also
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perform the same series of checks. The distinction is made in CheckTx to
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prevent spam and DoS attacks.
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*/
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package ante
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361
app/ante/eth.go
Normal file
361
app/ante/eth.go
Normal file
@ -0,0 +1,361 @@
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package ante
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import (
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"fmt"
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"math/big"
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sdk "github.com/cosmos/cosmos-sdk/types"
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sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
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"github.com/cosmos/cosmos-sdk/x/auth"
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authante "github.com/cosmos/cosmos-sdk/x/auth/ante"
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"github.com/cosmos/cosmos-sdk/x/auth/types"
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emint "github.com/cosmos/ethermint/types"
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evmtypes "github.com/cosmos/ethermint/x/evm/types"
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ethcore "github.com/ethereum/go-ethereum/core"
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)
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// EthSetupContextDecorator sets the infinite GasMeter in the Context and wraps
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// the next AnteHandler with a defer clause to recover from any downstream
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// OutOfGas panics in the AnteHandler chain to return an error with information
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// on gas provided and gas used.
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// CONTRACT: Must be first decorator in the chain
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// CONTRACT: Tx must implement GasTx interface
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type EthSetupContextDecorator struct{}
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// NewEthSetupContextDecorator creates a new EthSetupContextDecorator
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func NewEthSetupContextDecorator() EthSetupContextDecorator {
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return EthSetupContextDecorator{}
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}
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// AnteHandle sets the infinite gas meter to done to ignore costs in AnteHandler checks.
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// This is undone at the EthGasConsumeDecorator, where the context is set with the
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// ethereum tx GasLimit.
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func (escd EthSetupContextDecorator) AnteHandle(ctx sdk.Context, tx sdk.Tx, simulate bool, next sdk.AnteHandler) (newCtx sdk.Context, err error) {
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ctx = ctx.WithBlockGasMeter(sdk.NewInfiniteGasMeter())
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// all transactions must implement GasTx
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gasTx, ok := tx.(authante.GasTx)
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if !ok {
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return ctx, sdkerrors.Wrap(sdkerrors.ErrTxDecode, "Tx must be GasTx")
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}
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// Decorator will catch an OutOfGasPanic caused in the next antehandler
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// AnteHandlers must have their own defer/recover in order for the BaseApp
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// to know how much gas was used! This is because the GasMeter is created in
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// the AnteHandler, but if it panics the context won't be set properly in
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// runTx's recover call.
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defer func() {
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if r := recover(); r != nil {
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switch rType := r.(type) {
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case sdk.ErrorOutOfGas:
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log := fmt.Sprintf(
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"out of gas in location: %v; gasLimit: %d, gasUsed: %d",
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rType.Descriptor, gasTx.GetGas(), ctx.GasMeter().GasConsumed(),
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)
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err = sdkerrors.Wrap(sdkerrors.ErrOutOfGas, log)
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default:
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panic(r)
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}
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}
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}()
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return next(ctx, tx, simulate)
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}
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// EthMempoolFeeDecorator validates that sufficient fees have been provided that
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// meet a minimum threshold defined by the proposer (for mempool purposes during CheckTx).
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type EthMempoolFeeDecorator struct{}
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// NewEthMempoolFeeDecorator creates a new EthMempoolFeeDecorator
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func NewEthMempoolFeeDecorator() EthMempoolFeeDecorator {
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return EthMempoolFeeDecorator{}
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}
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// AnteHandle verifies that enough fees have been provided by the
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// Ethereum transaction that meet the minimum threshold set by the block
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// proposer.
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//
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// NOTE: This should only be run during a CheckTx mode.
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func (emfd EthMempoolFeeDecorator) AnteHandle(ctx sdk.Context, tx sdk.Tx, simulate bool, next sdk.AnteHandler) (newCtx sdk.Context, err error) {
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if !ctx.IsCheckTx() {
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return next(ctx, tx, simulate)
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}
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msgEthTx, ok := tx.(evmtypes.MsgEthereumTx)
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if !ok {
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return ctx, sdkerrors.Wrapf(sdkerrors.ErrUnknownRequest, "invalid transaction type: %T", tx)
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}
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// fee = GP * GL
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fee := sdk.NewInt64DecCoin(emint.DenomDefault, msgEthTx.Fee().Int64())
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minGasPrices := ctx.MinGasPrices()
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allGTE := true
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for _, v := range minGasPrices {
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if !fee.IsGTE(v) {
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allGTE = false
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}
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}
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// it is assumed that the minimum fees will only include the single valid denom
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if !ctx.MinGasPrices().IsZero() && !allGTE {
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// reject the transaction that does not meet the minimum fee
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return ctx, sdkerrors.Wrap(
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sdkerrors.ErrInsufficientFee,
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fmt.Sprintf("insufficient fee, got: %q required: %q", fee, ctx.MinGasPrices()),
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)
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}
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return next(ctx, tx, simulate)
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}
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// EthSigVerificationDecorator validates an ethereum signature
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type EthSigVerificationDecorator struct{}
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// NewEthSigVerificationDecorator creates a new EthSigVerificationDecorator
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func NewEthSigVerificationDecorator() EthSigVerificationDecorator {
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return EthSigVerificationDecorator{}
|
||||
}
|
||||
|
||||
// AnteHandle validates the signature and returns sender address
|
||||
func (esvd EthSigVerificationDecorator) AnteHandle(ctx sdk.Context, tx sdk.Tx, simulate bool, next sdk.AnteHandler) (newCtx sdk.Context, err error) {
|
||||
msgEthTx, ok := tx.(evmtypes.MsgEthereumTx)
|
||||
if !ok {
|
||||
return ctx, sdkerrors.Wrapf(sdkerrors.ErrUnknownRequest, "invalid transaction type: %T", tx)
|
||||
}
|
||||
|
||||
// parse the chainID from a string to a base-10 integer
|
||||
chainID, ok := new(big.Int).SetString(ctx.ChainID(), 10)
|
||||
if !ok {
|
||||
return ctx, sdkerrors.Wrap(emint.ErrInvalidChainID, ctx.ChainID())
|
||||
}
|
||||
|
||||
// validate sender/signature
|
||||
// NOTE: signer is retrieved from the transaction on the next AnteDecorator
|
||||
_, err = msgEthTx.VerifySig(chainID)
|
||||
if err != nil {
|
||||
return ctx, sdkerrors.Wrap(sdkerrors.ErrUnauthorized, fmt.Sprintf("signature verification failed"))
|
||||
}
|
||||
|
||||
return next(ctx, msgEthTx, simulate)
|
||||
}
|
||||
|
||||
// AccountVerificationDecorator validates an account balance checks
|
||||
type AccountVerificationDecorator struct {
|
||||
ak auth.AccountKeeper
|
||||
}
|
||||
|
||||
// NewAccountVerificationDecorator creates a new AccountVerificationDecorator
|
||||
func NewAccountVerificationDecorator(ak auth.AccountKeeper) AccountVerificationDecorator {
|
||||
return AccountVerificationDecorator{
|
||||
ak: ak,
|
||||
}
|
||||
}
|
||||
|
||||
// AnteHandle validates the signature and returns sender address
|
||||
func (avd AccountVerificationDecorator) AnteHandle(ctx sdk.Context, tx sdk.Tx, simulate bool, next sdk.AnteHandler) (newCtx sdk.Context, err error) {
|
||||
if !ctx.IsCheckTx() {
|
||||
return next(ctx, tx, simulate)
|
||||
}
|
||||
|
||||
msgEthTx, ok := tx.(evmtypes.MsgEthereumTx)
|
||||
if !ok {
|
||||
return ctx, sdkerrors.Wrapf(sdkerrors.ErrUnknownRequest, "invalid transaction type: %T", tx)
|
||||
}
|
||||
|
||||
// sender address should be in the tx cache
|
||||
address := msgEthTx.From()
|
||||
if address == nil {
|
||||
panic("sender address is nil")
|
||||
}
|
||||
|
||||
acc := avd.ak.GetAccount(ctx, address)
|
||||
if acc == nil {
|
||||
return ctx, fmt.Errorf("account %s is nil", address)
|
||||
}
|
||||
|
||||
// on InitChain make sure account number == 0
|
||||
if ctx.BlockHeight() == 0 && acc.GetAccountNumber() != 0 {
|
||||
return ctx, sdkerrors.Wrapf(
|
||||
sdkerrors.ErrInvalidSequence,
|
||||
"invalid account number for height zero (got %d)", acc.GetAccountNumber(),
|
||||
)
|
||||
}
|
||||
|
||||
// validate sender has enough funds
|
||||
balance := acc.GetCoins().AmountOf(emint.DenomDefault)
|
||||
if balance.BigInt().Cmp(msgEthTx.Cost()) < 0 {
|
||||
return ctx, sdkerrors.Wrapf(
|
||||
sdkerrors.ErrInsufficientFunds,
|
||||
"%s < %s%s", balance.String(), msgEthTx.Cost().String(), emint.DenomDefault,
|
||||
)
|
||||
}
|
||||
|
||||
return next(ctx, tx, simulate)
|
||||
}
|
||||
|
||||
// NonceVerificationDecorator that the nonce matches
|
||||
type NonceVerificationDecorator struct {
|
||||
ak auth.AccountKeeper
|
||||
}
|
||||
|
||||
// NewNonceVerificationDecorator creates a new NonceVerificationDecorator
|
||||
func NewNonceVerificationDecorator(ak auth.AccountKeeper) NonceVerificationDecorator {
|
||||
return NonceVerificationDecorator{
|
||||
ak: ak,
|
||||
}
|
||||
}
|
||||
|
||||
// AnteHandle validates that the transaction nonce is valid (equivalent to the sender account’s
|
||||
// current nonce).
|
||||
func (nvd NonceVerificationDecorator) AnteHandle(ctx sdk.Context, tx sdk.Tx, simulate bool, next sdk.AnteHandler) (newCtx sdk.Context, err error) {
|
||||
msgEthTx, ok := tx.(evmtypes.MsgEthereumTx)
|
||||
if !ok {
|
||||
return ctx, sdkerrors.Wrapf(sdkerrors.ErrUnknownRequest, "invalid transaction type: %T", tx)
|
||||
}
|
||||
|
||||
// sender address should be in the tx cache
|
||||
address := msgEthTx.From()
|
||||
if address == nil {
|
||||
panic("sender address is nil")
|
||||
}
|
||||
|
||||
acc := nvd.ak.GetAccount(ctx, address)
|
||||
if acc == nil {
|
||||
return ctx, fmt.Errorf("account %s is nil", address)
|
||||
}
|
||||
|
||||
seq := acc.GetSequence()
|
||||
if msgEthTx.Data.AccountNonce != seq {
|
||||
return ctx, sdkerrors.Wrap(
|
||||
sdkerrors.ErrInvalidSequence,
|
||||
fmt.Sprintf("invalid nonce; got %d, expected %d", msgEthTx.Data.AccountNonce, seq),
|
||||
)
|
||||
}
|
||||
|
||||
return next(ctx, tx, simulate)
|
||||
}
|
||||
|
||||
// EthGasConsumeDecorator validates enough intrinsic gas for the transaction and
|
||||
// gas consumption.
|
||||
type EthGasConsumeDecorator struct {
|
||||
ak auth.AccountKeeper
|
||||
sk types.SupplyKeeper
|
||||
}
|
||||
|
||||
// NewEthGasConsumeDecorator creates a new EthGasConsumeDecorator
|
||||
func NewEthGasConsumeDecorator(ak auth.AccountKeeper, sk types.SupplyKeeper) EthGasConsumeDecorator {
|
||||
return EthGasConsumeDecorator{
|
||||
ak: ak,
|
||||
sk: sk,
|
||||
}
|
||||
}
|
||||
|
||||
// AnteHandle validates that the Ethereum tx message has enough to cover intrinsic gas
|
||||
// (during CheckTx only) and that the sender has enough balance to pay for the gas cost.
|
||||
//
|
||||
// Intrinsic gas for a transaction is the amount of gas
|
||||
// that the transaction uses before the transaction is executed. The gas is a
|
||||
// constant value of 21000 plus any cost inccured by additional bytes of data
|
||||
// supplied with the transaction.
|
||||
func (egcd EthGasConsumeDecorator) AnteHandle(ctx sdk.Context, tx sdk.Tx, simulate bool, next sdk.AnteHandler) (newCtx sdk.Context, err error) {
|
||||
msgEthTx, ok := tx.(evmtypes.MsgEthereumTx)
|
||||
if !ok {
|
||||
return ctx, sdkerrors.Wrapf(sdkerrors.ErrUnknownRequest, "invalid transaction type: %T", tx)
|
||||
}
|
||||
|
||||
// sender address should be in the tx cache
|
||||
address := msgEthTx.From()
|
||||
if address == nil {
|
||||
panic("sender address is nil")
|
||||
}
|
||||
|
||||
// Fetch sender account from signature
|
||||
senderAcc, err := auth.GetSignerAcc(ctx, egcd.ak, address)
|
||||
if err != nil {
|
||||
return ctx, err
|
||||
}
|
||||
|
||||
if senderAcc == nil {
|
||||
return ctx, fmt.Errorf("sender account %s is nil", address)
|
||||
}
|
||||
|
||||
gasLimit := msgEthTx.GetGas()
|
||||
gas, err := ethcore.IntrinsicGas(msgEthTx.Data.Payload, msgEthTx.To() == nil, true)
|
||||
if err != nil {
|
||||
return ctx, sdkerrors.Wrap(err, "failed to compute intrinsic gas cost")
|
||||
}
|
||||
|
||||
// intrinsic gas verification during CheckTx
|
||||
if ctx.IsCheckTx() && gasLimit < gas {
|
||||
return ctx, fmt.Errorf("intrinsic gas too low: %d < %d", gasLimit, gas)
|
||||
}
|
||||
|
||||
// Charge sender for gas up to limit
|
||||
if gasLimit != 0 {
|
||||
// Cost calculates the fees paid to validators based on gas limit and price
|
||||
cost := new(big.Int).Mul(msgEthTx.Data.Price, new(big.Int).SetUint64(gasLimit))
|
||||
|
||||
feeAmt := sdk.NewCoins(
|
||||
sdk.NewCoin(emint.DenomDefault, sdk.NewIntFromBigInt(cost)),
|
||||
)
|
||||
|
||||
err = auth.DeductFees(egcd.sk, ctx, senderAcc, feeAmt)
|
||||
if err != nil {
|
||||
return ctx, err
|
||||
}
|
||||
}
|
||||
|
||||
// Set gas meter after ante handler to ignore gaskv costs
|
||||
newCtx = auth.SetGasMeter(simulate, ctx, gasLimit)
|
||||
newCtx.GasMeter().ConsumeGas(gas, "eth intrinsic gas")
|
||||
|
||||
return next(newCtx, tx, simulate)
|
||||
}
|
||||
|
||||
// IncrementSenderSequenceDecorator increments the sequence of the signers. The
|
||||
// main difference with the SDK's IncrementSequenceDecorator is that the MsgEthereumTx
|
||||
// doesn't implement the SigVerifiableTx interface.
|
||||
//
|
||||
// CONTRACT: must be called after msg.VerifySig in order to cache the sender address.
|
||||
type IncrementSenderSequenceDecorator struct {
|
||||
ak auth.AccountKeeper
|
||||
}
|
||||
|
||||
// NewIncrementSenderSequenceDecorator creates a new IncrementSenderSequenceDecorator.
|
||||
func NewIncrementSenderSequenceDecorator(ak auth.AccountKeeper) IncrementSenderSequenceDecorator {
|
||||
return IncrementSenderSequenceDecorator{
|
||||
ak: ak,
|
||||
}
|
||||
}
|
||||
|
||||
// AnteHandle handles incrementing the sequence of the sender.
|
||||
func (issd IncrementSenderSequenceDecorator) AnteHandle(ctx sdk.Context, tx sdk.Tx, simulate bool, next sdk.AnteHandler) (sdk.Context, error) {
|
||||
// no need to increment sequence on RecheckTx
|
||||
if ctx.IsReCheckTx() && !simulate {
|
||||
return next(ctx, tx, simulate)
|
||||
}
|
||||
|
||||
// get and set account must be called with an infinite gas meter in order to prevent
|
||||
// additional gas from being deducted.
|
||||
oldCtx := ctx.WithBlockGasMeter(sdk.NewInfiniteGasMeter())
|
||||
|
||||
msgEthTx, ok := tx.(evmtypes.MsgEthereumTx)
|
||||
if !ok {
|
||||
return ctx, sdkerrors.Wrapf(sdkerrors.ErrUnknownRequest, "invalid transaction type: %T", tx)
|
||||
}
|
||||
|
||||
// increment sequence of all signers
|
||||
for _, addr := range msgEthTx.GetSigners() {
|
||||
acc := issd.ak.GetAccount(oldCtx, addr)
|
||||
if err := acc.SetSequence(acc.GetSequence() + 1); err != nil {
|
||||
panic(err)
|
||||
}
|
||||
issd.ak.SetAccount(oldCtx, acc)
|
||||
}
|
||||
|
||||
return next(ctx, tx, simulate)
|
||||
}
|
||||
@ -8,12 +8,18 @@ import (
|
||||
tmtypes "github.com/tendermint/tendermint/types"
|
||||
|
||||
"github.com/cosmos/cosmos-sdk/codec"
|
||||
"github.com/cosmos/cosmos-sdk/simapp"
|
||||
sdk "github.com/cosmos/cosmos-sdk/types"
|
||||
"github.com/cosmos/cosmos-sdk/x/slashing"
|
||||
"github.com/cosmos/cosmos-sdk/x/staking"
|
||||
"github.com/cosmos/cosmos-sdk/x/staking/exported"
|
||||
)
|
||||
|
||||
// NewDefaultGenesisState generates the default state for the application.
|
||||
func NewDefaultGenesisState() simapp.GenesisState {
|
||||
return ModuleBasics.DefaultGenesis()
|
||||
}
|
||||
|
||||
// ExportAppStateAndValidators exports the state of the application for a genesis
|
||||
// file.
|
||||
func (app *EthermintApp) ExportAppStateAndValidators(
|
||||
|
||||
@ -6,16 +6,16 @@ import (
|
||||
dbm "github.com/tendermint/tm-db"
|
||||
|
||||
"github.com/cosmos/cosmos-sdk/codec"
|
||||
"github.com/cosmos/cosmos-sdk/simapp"
|
||||
)
|
||||
|
||||
// Setup initializes a new EthermintApp. A Nop logger is set in EthermintApp.
|
||||
func Setup(isCheckTx bool) *EthermintApp {
|
||||
db := dbm.NewMemDB()
|
||||
app := NewEthermintApp(log.NewNopLogger(), db, nil, true, 0)
|
||||
|
||||
if !isCheckTx {
|
||||
// init chain must be called to stop deliverState from being nil
|
||||
genesisState := simapp.NewDefaultGenesisState()
|
||||
genesisState := NewDefaultGenesisState()
|
||||
stateBytes, err := codec.MarshalJSONIndent(app.Codec(), genesisState)
|
||||
if err != nil {
|
||||
panic(err)
|
||||
|
||||
@ -157,10 +157,13 @@ func (msg MsgEthereumTx) GetMsgs() []sdk.Msg {
|
||||
// GetSigners returns the expected signers for an Ethereum transaction message.
|
||||
// For such a message, there should exist only a single 'signer'.
|
||||
//
|
||||
// NOTE: This method cannot be used as a chain ID is needed to recover the signer
|
||||
// from the signature. Use 'VerifySig' instead.
|
||||
// NOTE: This method panics if 'VerifySig' hasn't been called first.
|
||||
func (msg MsgEthereumTx) GetSigners() []sdk.AccAddress {
|
||||
panic("must use 'VerifySig' with a chain ID to get the signer")
|
||||
sender := msg.From()
|
||||
if sender.Empty() {
|
||||
panic("must use 'VerifySig' with a chain ID to get the signer")
|
||||
}
|
||||
return []sdk.AccAddress{sender}
|
||||
}
|
||||
|
||||
// GetSignBytes returns the Amino bytes of an Ethereum transaction message used
|
||||
@ -271,11 +274,9 @@ func (msg *MsgEthereumTx) VerifySig(chainID *big.Int) (ethcmn.Address, error) {
|
||||
return sender, nil
|
||||
}
|
||||
|
||||
// Cost returns amount + gasprice * gaslimit.
|
||||
func (msg MsgEthereumTx) Cost() *big.Int {
|
||||
total := msg.Fee()
|
||||
total.Add(total, msg.Data.Amount)
|
||||
return total
|
||||
// GetGas implements the GasTx interface. It returns the GasLimit of the transaction.
|
||||
func (msg MsgEthereumTx) GetGas() uint64 {
|
||||
return msg.Data.GasLimit
|
||||
}
|
||||
|
||||
// Fee returns gasprice * gaslimit.
|
||||
@ -288,6 +289,30 @@ func (msg *MsgEthereumTx) ChainID() *big.Int {
|
||||
return deriveChainID(msg.Data.V)
|
||||
}
|
||||
|
||||
// Cost returns amount + gasprice * gaslimit.
|
||||
func (msg MsgEthereumTx) Cost() *big.Int {
|
||||
total := msg.Fee()
|
||||
total.Add(total, msg.Data.Amount)
|
||||
return total
|
||||
}
|
||||
|
||||
// From loads the ethereum sender address from the sigcache and returns an
|
||||
// sdk.AccAddress from its bytes
|
||||
func (msg *MsgEthereumTx) From() sdk.AccAddress {
|
||||
sc := msg.from.Load()
|
||||
if sc == nil {
|
||||
return nil
|
||||
}
|
||||
|
||||
sigCache := sc.(sigCache)
|
||||
|
||||
if len(sigCache.from.Bytes()) == 0 {
|
||||
return nil
|
||||
}
|
||||
|
||||
return sdk.AccAddress(sigCache.from.Bytes())
|
||||
}
|
||||
|
||||
// deriveChainID derives the chain id from the given v parameter
|
||||
func deriveChainID(v *big.Int) *big.Int {
|
||||
if v.BitLen() <= 64 {
|
||||
|
||||
Loading…
Reference in New Issue
Block a user