laconicd/app/ante/eth.go
Federico Kunze 261f86fdf2
bump SDK to v0.39.1 (#386)
* bump sdk version to v0.39.0 candidate

* updates

* update evm

* bump commit

* more changes

* build

* genesis

* fix tests

* fix tests

* bump commit

* bump commit

* bump commit

* add keygen func

* bump version to 0.39.0-rc0

* update AnteHandler

* fix TxDecoder

* lint

* fix test

* update statedb

* changelog

* fixes

* remove extra files

* update make test-import

* rename test

* bump SDK version to final release

* update to 0.39.1-rc1

* fix evm tests

* update RPC

* minor fixes

* update to rc2

* bump to v0.39.1

* fix personal API

* fix string type cast ambiguity (#449)

* init

* fix estimate gas test

* minor genesis change

* remove comments from unstable commit (stargate release)

Co-authored-by: Alessio Treglia <quadrispro@ubuntu.com>
2020-08-23 17:41:54 -04:00

367 lines
12 KiB
Go
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

package ante
import (
"fmt"
"math/big"
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/cosmos-sdk/x/bank"
emint "github.com/cosmos/ethermint/types"
evmtypes "github.com/cosmos/ethermint/x/evm/types"
"github.com/ethereum/go-ethereum/common"
ethcore "github.com/ethereum/go-ethereum/core"
)
// EthSetupContextDecorator sets the infinite GasMeter in the Context and wraps
// the next AnteHandler with a defer clause to recover from any downstream
// OutOfGas panics in the AnteHandler chain to return an error with information
// on gas provided and gas used.
// CONTRACT: Must be first decorator in the chain
// CONTRACT: Tx must implement GasTx interface
type EthSetupContextDecorator struct{}
// NewEthSetupContextDecorator creates a new EthSetupContextDecorator
func NewEthSetupContextDecorator() EthSetupContextDecorator {
return EthSetupContextDecorator{}
}
// AnteHandle sets the infinite gas meter to done to ignore costs in AnteHandler checks.
// This is undone at the EthGasConsumeDecorator, where the context is set with the
// ethereum tx GasLimit.
func (escd EthSetupContextDecorator) AnteHandle(ctx sdk.Context, tx sdk.Tx, simulate bool, next sdk.AnteHandler) (newCtx sdk.Context, err error) {
ctx = ctx.WithBlockGasMeter(sdk.NewInfiniteGasMeter())
// all transactions must implement GasTx
gasTx, ok := tx.(authante.GasTx)
if !ok {
return ctx, sdkerrors.Wrap(sdkerrors.ErrTxDecode, "Tx must be GasTx")
}
// Decorator will catch an OutOfGasPanic caused in the next antehandler
// AnteHandlers must have their own defer/recover in order for the BaseApp
// to know how much gas was used! This is because the GasMeter is created in
// the AnteHandler, but if it panics the context won't be set properly in
// runTx's recover call.
defer func() {
if r := recover(); r != nil {
switch rType := r.(type) {
case sdk.ErrorOutOfGas:
log := fmt.Sprintf(
"out of gas in location: %v; gasLimit: %d, gasUsed: %d",
rType.Descriptor, gasTx.GetGas(), ctx.GasMeter().GasConsumed(),
)
err = sdkerrors.Wrap(sdkerrors.ErrOutOfGas, log)
default:
panic(r)
}
}
}()
return next(ctx, tx, simulate)
}
// EthMempoolFeeDecorator validates that sufficient fees have been provided that
// meet a minimum threshold defined by the proposer (for mempool purposes during CheckTx).
type EthMempoolFeeDecorator struct{}
// NewEthMempoolFeeDecorator creates a new EthMempoolFeeDecorator
func NewEthMempoolFeeDecorator() EthMempoolFeeDecorator {
return EthMempoolFeeDecorator{}
}
// AnteHandle verifies that enough fees have been provided by the
// Ethereum transaction that meet the minimum threshold set by the block
// proposer.
//
// NOTE: This should only be run during a CheckTx mode.
func (emfd EthMempoolFeeDecorator) 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)
}
// fee = GP * GL
fee := sdk.NewInt64DecCoin(emint.DenomDefault, msgEthTx.Fee().Int64())
minGasPrices := ctx.MinGasPrices()
// check that fee provided is greater than the minimum
// NOTE: we only check if photons are present in min gas prices. It is up to the
// sender if they want to send additional fees in other denominations.
var hasEnoughFees bool
if fee.Amount.GTE(minGasPrices.AmountOf(emint.DenomDefault)) {
hasEnoughFees = true
}
// reject transaction if minimum gas price is positive and the transaction does not
// meet the minimum fee
if !ctx.MinGasPrices().IsZero() && !hasEnoughFees {
return ctx, sdkerrors.Wrap(
sdkerrors.ErrInsufficientFee,
fmt.Sprintf("insufficient fee, got: %q required: %q", fee, ctx.MinGasPrices()),
)
}
return next(ctx, tx, simulate)
}
// EthSigVerificationDecorator validates an ethereum signature
type EthSigVerificationDecorator struct{}
// NewEthSigVerificationDecorator creates a new EthSigVerificationDecorator
func NewEthSigVerificationDecorator() EthSigVerificationDecorator {
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
_, err = msgEthTx.VerifySig(chainID)
if err != nil {
return ctx, sdkerrors.Wrap(sdkerrors.ErrUnauthorized, fmt.Sprintf("signature verification failed: %s", err.Error()))
}
// NOTE: when signature verification succeeds, a non-empty signer address can be
// retrieved from the transaction on the next AnteDecorators.
return next(ctx, msgEthTx, simulate)
}
// AccountVerificationDecorator validates an account balance checks
type AccountVerificationDecorator struct {
ak auth.AccountKeeper
bk bank.Keeper
}
// NewAccountVerificationDecorator creates a new AccountVerificationDecorator
func NewAccountVerificationDecorator(ak auth.AccountKeeper, bk bank.Keeper) AccountVerificationDecorator {
return AccountVerificationDecorator{
ak: ak,
bk: bk,
}
}
// 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 from the previous AnteHandle call
address := msgEthTx.From()
if address.Empty() {
panic("sender address cannot be empty")
}
acc := avd.ak.GetAccount(ctx, address)
if acc == nil {
return ctx, fmt.Errorf("account %s (%s) is nil", common.BytesToAddress(address.Bytes()), 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 to pay for gas cost
balance := sdk.Coin{Denom: emint.DenomDefault, Amount: acc.GetCoins().AmountOf(emint.DenomDefault)}
if balance.Amount.BigInt().Cmp(msgEthTx.Cost()) < 0 {
return ctx, sdkerrors.Wrapf(
sdkerrors.ErrInsufficientFunds,
"sender balance < tx gas cost (%s < %s%s)", balance.String(), msgEthTx.Cost().String(), emint.DenomDefault,
)
}
return next(ctx, tx, simulate)
}
// NonceVerificationDecorator that the account nonce from the transaction matches
// the sender account sequence.
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 accounts
// 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 from the previous AnteHandle call
address := msgEthTx.From()
if address.Empty() {
panic("sender address cannot be empty")
}
acc := nvd.ak.GetAccount(ctx, address)
if acc == nil {
return ctx, fmt.Errorf("account %s (%s) is nil", common.BytesToAddress(address.Bytes()), 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.Empty() {
panic("sender address cannot be empty")
}
// 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 (%s) is nil", common.BytesToAddress(address.Bytes()), address)
}
gasLimit := msgEthTx.GetGas()
gas, err := ethcore.IntrinsicGas(msgEthTx.Data.Payload, msgEthTx.To() == nil, true, false)
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)
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) {
// get and set account must be called with an infinite gas meter in order to prevent
// additional gas from being deducted.
gasMeter := ctx.GasMeter()
ctx = ctx.WithGasMeter(sdk.NewInfiniteGasMeter())
msgEthTx, ok := tx.(evmtypes.MsgEthereumTx)
if !ok {
ctx = ctx.WithGasMeter(gasMeter)
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(ctx, addr)
if err := acc.SetSequence(acc.GetSequence() + 1); err != nil {
panic(err)
}
issd.ak.SetAccount(ctx, acc)
}
// set the original gas meter
ctx = ctx.WithGasMeter(gasMeter)
return next(ctx, tx, simulate)
}