laconicd/app/ante/eth.go

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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"
bump Cosmos SDK version to v0.38.2 (#183) * evm: move Keeper and Querier to /keeper package * keeper: update keeper_test.go * fix format * evm: use aliased types * bump SDK version to v0.38.1 * app: updates from new version * errors: switch sdk.Error -> error * errors: switch sdk.Error -> error. Continuation * more fixes * update app/ * update keys and client pkgs * build * fix tests * lint * minor changes * changelog * address @austinbell comments * Fix keyring usage in rpc API and CLI * fix keyring * break line * Misc cleanup (#188) * evm: move Begin and EndBlock to abci.go * evm: use expected keeper interfaces * app: use EthermintApp for integration and unit test setup * evm: remove count type; update codec * go mod verify * evm: rename msgs for consistency * evm: events * minor cleanup * lint * ante: update tests * changelog * nolint * evm: update statedb to create ethermint Account instead of BaseAccount * fix importer test * address @austinabell comments * update README * changelog * evm: update codec * fix event sender * store logs in keeper after transition (#210) * add some comments * begin log handler test * update TransitionCSDB to return ReturnData * use rlp for result data encode/decode * update tests * implement SetBlockLogs * implement GetBlockLogs * test log set/get * update keeper get/set logs to use hash as key * fix test * move logsKey to csdb * attempt to fix test * attempt to fix test * attempt to fix test * lint * lint * lint * save logs after handling msg * update k.Logs * cleanup * remove unused * fix issues * comment out handler test * address comments * lint * fix handler test * address comments * use amino * lint * address comments * merge * fix encoding bug * minor fix * rpc: error handling * rpc: simulate only returns gasConsumed * rpc: error ineffassign * go: bump version to 1.14 and SDK version to latest master * rpc: fix simulation return value * breaking changes from SDK * sdk: breaking changes; build * tests: fixes * minor fix * proto: ethermint types attempt * proto: define EthAccount proto type and extend sdk std.Codec * evm: fix panic on handler test * evm: minor state object changes * cleanup * tests: update test-importer * fix pubkey registration * lint * cleanup * more test checks for importer * minor change * codec fixes * rm init func * fix importer test build * fix marshaling for TxDecoder * use amino codec for evm * fix marshaling for SimulationResponse * use jsonpb for unmarshaling * fix method handler crashed * return err on VerifySig * switch stateObject balance to sdk.Int * fixes to codec and encoding * cleanup * set tmhash -> ethhash in state transition * add tmhash->ethereumhash to csdb.GetLogs * attempt to fix tests * update GetLogs to switch with Has * ante panic * diff changes * update SetLogs * evm/cli: use ethermint codec * use LengthPrefixed for encoding * add check for nil *big.Int * add balance to UpdateAccounts * fix previous balance * fix balance bug * prevent panic on make test-import Co-authored-by: austinabell <austinabell8@gmail.com> Co-authored-by: noot <36753753+noot@users.noreply.github.com> Co-authored-by: noot <elizabethjbinks@gmail.com>
2020-04-22 19:26:01 +00:00
"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 aphotons 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
bump Cosmos SDK version to v0.38.2 (#183) * evm: move Keeper and Querier to /keeper package * keeper: update keeper_test.go * fix format * evm: use aliased types * bump SDK version to v0.38.1 * app: updates from new version * errors: switch sdk.Error -> error * errors: switch sdk.Error -> error. Continuation * more fixes * update app/ * update keys and client pkgs * build * fix tests * lint * minor changes * changelog * address @austinbell comments * Fix keyring usage in rpc API and CLI * fix keyring * break line * Misc cleanup (#188) * evm: move Begin and EndBlock to abci.go * evm: use expected keeper interfaces * app: use EthermintApp for integration and unit test setup * evm: remove count type; update codec * go mod verify * evm: rename msgs for consistency * evm: events * minor cleanup * lint * ante: update tests * changelog * nolint * evm: update statedb to create ethermint Account instead of BaseAccount * fix importer test * address @austinabell comments * update README * changelog * evm: update codec * fix event sender * store logs in keeper after transition (#210) * add some comments * begin log handler test * update TransitionCSDB to return ReturnData * use rlp for result data encode/decode * update tests * implement SetBlockLogs * implement GetBlockLogs * test log set/get * update keeper get/set logs to use hash as key * fix test * move logsKey to csdb * attempt to fix test * attempt to fix test * attempt to fix test * lint * lint * lint * save logs after handling msg * update k.Logs * cleanup * remove unused * fix issues * comment out handler test * address comments * lint * fix handler test * address comments * use amino * lint * address comments * merge * fix encoding bug * minor fix * rpc: error handling * rpc: simulate only returns gasConsumed * rpc: error ineffassign * go: bump version to 1.14 and SDK version to latest master * rpc: fix simulation return value * breaking changes from SDK * sdk: breaking changes; build * tests: fixes * minor fix * proto: ethermint types attempt * proto: define EthAccount proto type and extend sdk std.Codec * evm: fix panic on handler test * evm: minor state object changes * cleanup * tests: update test-importer * fix pubkey registration * lint * cleanup * more test checks for importer * minor change * codec fixes * rm init func * fix importer test build * fix marshaling for TxDecoder * use amino codec for evm * fix marshaling for SimulationResponse * use jsonpb for unmarshaling * fix method handler crashed * return err on VerifySig * switch stateObject balance to sdk.Int * fixes to codec and encoding * cleanup * set tmhash -> ethhash in state transition * add tmhash->ethereumhash to csdb.GetLogs * attempt to fix tests * update GetLogs to switch with Has * ante panic * diff changes * update SetLogs * evm/cli: use ethermint codec * use LengthPrefixed for encoding * add check for nil *big.Int * add balance to UpdateAccounts * fix previous balance * fix balance bug * prevent panic on make test-import Co-authored-by: austinabell <austinabell8@gmail.com> Co-authored-by: noot <36753753+noot@users.noreply.github.com> Co-authored-by: noot <elizabethjbinks@gmail.com>
2020-04-22 19:26:01 +00:00
bk bank.Keeper
}
// NewAccountVerificationDecorator creates a new AccountVerificationDecorator
bump Cosmos SDK version to v0.38.2 (#183) * evm: move Keeper and Querier to /keeper package * keeper: update keeper_test.go * fix format * evm: use aliased types * bump SDK version to v0.38.1 * app: updates from new version * errors: switch sdk.Error -> error * errors: switch sdk.Error -> error. Continuation * more fixes * update app/ * update keys and client pkgs * build * fix tests * lint * minor changes * changelog * address @austinbell comments * Fix keyring usage in rpc API and CLI * fix keyring * break line * Misc cleanup (#188) * evm: move Begin and EndBlock to abci.go * evm: use expected keeper interfaces * app: use EthermintApp for integration and unit test setup * evm: remove count type; update codec * go mod verify * evm: rename msgs for consistency * evm: events * minor cleanup * lint * ante: update tests * changelog * nolint * evm: update statedb to create ethermint Account instead of BaseAccount * fix importer test * address @austinabell comments * update README * changelog * evm: update codec * fix event sender * store logs in keeper after transition (#210) * add some comments * begin log handler test * update TransitionCSDB to return ReturnData * use rlp for result data encode/decode * update tests * implement SetBlockLogs * implement GetBlockLogs * test log set/get * update keeper get/set logs to use hash as key * fix test * move logsKey to csdb * attempt to fix test * attempt to fix test * attempt to fix test * lint * lint * lint * save logs after handling msg * update k.Logs * cleanup * remove unused * fix issues * comment out handler test * address comments * lint * fix handler test * address comments * use amino * lint * address comments * merge * fix encoding bug * minor fix * rpc: error handling * rpc: simulate only returns gasConsumed * rpc: error ineffassign * go: bump version to 1.14 and SDK version to latest master * rpc: fix simulation return value * breaking changes from SDK * sdk: breaking changes; build * tests: fixes * minor fix * proto: ethermint types attempt * proto: define EthAccount proto type and extend sdk std.Codec * evm: fix panic on handler test * evm: minor state object changes * cleanup * tests: update test-importer * fix pubkey registration * lint * cleanup * more test checks for importer * minor change * codec fixes * rm init func * fix importer test build * fix marshaling for TxDecoder * use amino codec for evm * fix marshaling for SimulationResponse * use jsonpb for unmarshaling * fix method handler crashed * return err on VerifySig * switch stateObject balance to sdk.Int * fixes to codec and encoding * cleanup * set tmhash -> ethhash in state transition * add tmhash->ethereumhash to csdb.GetLogs * attempt to fix tests * update GetLogs to switch with Has * ante panic * diff changes * update SetLogs * evm/cli: use ethermint codec * use LengthPrefixed for encoding * add check for nil *big.Int * add balance to UpdateAccounts * fix previous balance * fix balance bug * prevent panic on make test-import Co-authored-by: austinabell <austinabell8@gmail.com> Co-authored-by: noot <36753753+noot@users.noreply.github.com> Co-authored-by: noot <elizabethjbinks@gmail.com>
2020-04-22 19:26:01 +00:00
func NewAccountVerificationDecorator(ak auth.AccountKeeper, bk bank.Keeper) AccountVerificationDecorator {
return AccountVerificationDecorator{
ak: ak,
bump Cosmos SDK version to v0.38.2 (#183) * evm: move Keeper and Querier to /keeper package * keeper: update keeper_test.go * fix format * evm: use aliased types * bump SDK version to v0.38.1 * app: updates from new version * errors: switch sdk.Error -> error * errors: switch sdk.Error -> error. Continuation * more fixes * update app/ * update keys and client pkgs * build * fix tests * lint * minor changes * changelog * address @austinbell comments * Fix keyring usage in rpc API and CLI * fix keyring * break line * Misc cleanup (#188) * evm: move Begin and EndBlock to abci.go * evm: use expected keeper interfaces * app: use EthermintApp for integration and unit test setup * evm: remove count type; update codec * go mod verify * evm: rename msgs for consistency * evm: events * minor cleanup * lint * ante: update tests * changelog * nolint * evm: update statedb to create ethermint Account instead of BaseAccount * fix importer test * address @austinabell comments * update README * changelog * evm: update codec * fix event sender * store logs in keeper after transition (#210) * add some comments * begin log handler test * update TransitionCSDB to return ReturnData * use rlp for result data encode/decode * update tests * implement SetBlockLogs * implement GetBlockLogs * test log set/get * update keeper get/set logs to use hash as key * fix test * move logsKey to csdb * attempt to fix test * attempt to fix test * attempt to fix test * lint * lint * lint * save logs after handling msg * update k.Logs * cleanup * remove unused * fix issues * comment out handler test * address comments * lint * fix handler test * address comments * use amino * lint * address comments * merge * fix encoding bug * minor fix * rpc: error handling * rpc: simulate only returns gasConsumed * rpc: error ineffassign * go: bump version to 1.14 and SDK version to latest master * rpc: fix simulation return value * breaking changes from SDK * sdk: breaking changes; build * tests: fixes * minor fix * proto: ethermint types attempt * proto: define EthAccount proto type and extend sdk std.Codec * evm: fix panic on handler test * evm: minor state object changes * cleanup * tests: update test-importer * fix pubkey registration * lint * cleanup * more test checks for importer * minor change * codec fixes * rm init func * fix importer test build * fix marshaling for TxDecoder * use amino codec for evm * fix marshaling for SimulationResponse * use jsonpb for unmarshaling * fix method handler crashed * return err on VerifySig * switch stateObject balance to sdk.Int * fixes to codec and encoding * cleanup * set tmhash -> ethhash in state transition * add tmhash->ethereumhash to csdb.GetLogs * attempt to fix tests * update GetLogs to switch with Has * ante panic * diff changes * update SetLogs * evm/cli: use ethermint codec * use LengthPrefixed for encoding * add check for nil *big.Int * add balance to UpdateAccounts * fix previous balance * fix balance bug * prevent panic on make test-import Co-authored-by: austinabell <austinabell8@gmail.com> Co-authored-by: noot <36753753+noot@users.noreply.github.com> Co-authored-by: noot <elizabethjbinks@gmail.com>
2020-04-22 19:26:01 +00:00
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)}
bump Cosmos SDK version to v0.38.2 (#183) * evm: move Keeper and Querier to /keeper package * keeper: update keeper_test.go * fix format * evm: use aliased types * bump SDK version to v0.38.1 * app: updates from new version * errors: switch sdk.Error -> error * errors: switch sdk.Error -> error. Continuation * more fixes * update app/ * update keys and client pkgs * build * fix tests * lint * minor changes * changelog * address @austinbell comments * Fix keyring usage in rpc API and CLI * fix keyring * break line * Misc cleanup (#188) * evm: move Begin and EndBlock to abci.go * evm: use expected keeper interfaces * app: use EthermintApp for integration and unit test setup * evm: remove count type; update codec * go mod verify * evm: rename msgs for consistency * evm: events * minor cleanup * lint * ante: update tests * changelog * nolint * evm: update statedb to create ethermint Account instead of BaseAccount * fix importer test * address @austinabell comments * update README * changelog * evm: update codec * fix event sender * store logs in keeper after transition (#210) * add some comments * begin log handler test * update TransitionCSDB to return ReturnData * use rlp for result data encode/decode * update tests * implement SetBlockLogs * implement GetBlockLogs * test log set/get * update keeper get/set logs to use hash as key * fix test * move logsKey to csdb * attempt to fix test * attempt to fix test * attempt to fix test * lint * lint * lint * save logs after handling msg * update k.Logs * cleanup * remove unused * fix issues * comment out handler test * address comments * lint * fix handler test * address comments * use amino * lint * address comments * merge * fix encoding bug * minor fix * rpc: error handling * rpc: simulate only returns gasConsumed * rpc: error ineffassign * go: bump version to 1.14 and SDK version to latest master * rpc: fix simulation return value * breaking changes from SDK * sdk: breaking changes; build * tests: fixes * minor fix * proto: ethermint types attempt * proto: define EthAccount proto type and extend sdk std.Codec * evm: fix panic on handler test * evm: minor state object changes * cleanup * tests: update test-importer * fix pubkey registration * lint * cleanup * more test checks for importer * minor change * codec fixes * rm init func * fix importer test build * fix marshaling for TxDecoder * use amino codec for evm * fix marshaling for SimulationResponse * use jsonpb for unmarshaling * fix method handler crashed * return err on VerifySig * switch stateObject balance to sdk.Int * fixes to codec and encoding * cleanup * set tmhash -> ethhash in state transition * add tmhash->ethereumhash to csdb.GetLogs * attempt to fix tests * update GetLogs to switch with Has * ante panic * diff changes * update SetLogs * evm/cli: use ethermint codec * use LengthPrefixed for encoding * add check for nil *big.Int * add balance to UpdateAccounts * fix previous balance * fix balance bug * prevent panic on make test-import Co-authored-by: austinabell <austinabell8@gmail.com> Co-authored-by: noot <36753753+noot@users.noreply.github.com> Co-authored-by: noot <elizabethjbinks@gmail.com>
2020-04-22 19:26:01 +00:00
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)
}