Problem: transient store usage not compatible with parallel tx execution

CHANGELOG.md

@@ -49,6 +49,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 * (statedb) [#446](https://github.com/crypto-org-chain/ethermint/pull/446) Re-use the cache store implementation with sdk.
 * (evm) [#447](https://github.com/crypto-org-chain/ethermint/pull/447) Deduct fee through virtual bank transfer.
 * (evm) [#448](https://github.com/crypto-org-chain/ethermint/pull/448) Refactor the evm transfer to be more efficient.
+* (evm) [#450](https://github.com/crypto-org-chain/ethermint/pull/450) Refactor transient stores to be compatible with parallel tx execution.
 
 ### State Machine Breaking
 

app/ante/handler_options.go

@@ -87,7 +87,7 @@ func newEthAnteHandler(options HandlerOptions) sdk.AnteHandler {
 		}
 
 		// We need to setup an empty gas config so that the gas is consistent with Ethereum.
-		ctx, err = SetupEthContext(ctx, options.EvmKeeper)
+		ctx, err = SetupEthContext(ctx)
 		if err != nil {
 			return ctx, err
 		}

app/ante/interfaces.go

@@ -32,8 +32,6 @@ type EVMKeeper interface {
 	ChainID() *big.Int
 
 	DeductTxCostsFromUserBalance(ctx sdk.Context, fees sdk.Coins, from common.Address) error
-	ResetTransientGasUsed(ctx sdk.Context)
-	GetTxIndexTransient(ctx sdk.Context) uint64
 }
 
 type protoTxProvider interface {

app/ante/setup.go

@@ -30,16 +30,12 @@ import (
 
 // SetupEthContext is adapted from SetUpContextDecorator from cosmos-sdk, it ignores gas consumption
 // by setting the gas meter to infinite
-func SetupEthContext(ctx sdk.Context, evmKeeper EVMKeeper) (newCtx sdk.Context, err error) {
+func SetupEthContext(ctx sdk.Context) (newCtx sdk.Context, err error) {
 	// We need to setup an empty gas config so that the gas is consistent with Ethereum.
 	newCtx = ctx.WithGasMeter(storetypes.NewInfiniteGasMeter()).
 		WithKVGasConfig(storetypes.GasConfig{}).
 		WithTransientKVGasConfig(storetypes.GasConfig{})
 
-	// Reset transient gas used to prepare the execution of current cosmos tx.
-	// Transient gas-used is necessary to sum the gas-used of cosmos tx, when it contains multiple eth msgs.
-	evmKeeper.ResetTransientGasUsed(ctx)
-
 	return newCtx, nil
 }
 

app/ante/setup_test.go

@@ -28,7 +28,7 @@ func (suite *AnteTestSuite) TestEthSetupContextDecorator() {
 
 	for _, tc := range testCases {
 		suite.Run(tc.name, func() {
-			ctx, err := ante.SetupEthContext(suite.ctx, suite.app.EvmKeeper)
+			ctx, err := ante.SetupEthContext(suite.ctx)
 
 			if tc.expPass {
 				suite.Require().NoError(err)

app/app.go

@@ -314,6 +314,7 @@ func NewEthermintApp(
 	bApp.SetVersion(version.Version)
 	bApp.SetInterfaceRegistry(interfaceRegistry)
 	bApp.SetTxEncoder(txConfig.TxEncoder())
+	bApp.SetTxExecutor(DefaultTxExecutor)
 
 	keys := storetypes.NewKVStoreKeys(
 		// SDK keys

app/executor.go

@@ -0,0 +1,21 @@
+package app
+
+import (
+	"context"
+
+	storetypes "cosmossdk.io/store/types"
+	abci "github.com/cometbft/cometbft/abci/types"
+	evmtypes "github.com/evmos/ethermint/x/evm/types"
+)
+
+func DefaultTxExecutor(_ context.Context,
+	blockSize int,
+	ms storetypes.MultiStore,
+	deliverTxWithMultiStore func(int, storetypes.MultiStore) *abci.ExecTxResult,
+) ([]*abci.ExecTxResult, error) {
+	results := make([]*abci.ExecTxResult, blockSize)
+	for i := 0; i < blockSize; i++ {
+		results[i] = deliverTxWithMultiStore(i, ms)
+	}
+	return evmtypes.PatchTxResponses(results), nil
+}

tests/importer/importer_test.go

@@ -144,10 +144,10 @@ func (suite *ImporterTestSuite) TestImportBlocks() {
 			applyDAOHardFork(vmdb)
 		}
 
-		for _, tx := range block.Transactions() {
+		for i, tx := range block.Transactions() {
 
 			receipt, gas, err := applyTransaction(
-				ctx, chainConfig, chainContext, nil, gp, suite.app.EvmKeeper, vmdb, header, tx, usedGas, vmConfig,
+				ctx, chainConfig, chainContext, nil, gp, suite.app.EvmKeeper, vmdb, header, tx, usedGas, vmConfig, uint(i),
 			)
 			suite.Require().NoError(err, "failed to apply tx at block %d; tx: %X; gas %d; receipt:%v", block.NumberU64(), tx.Hash(), gas, receipt)
 			suite.Require().NotNil(receipt)
@@ -230,7 +230,7 @@ func applyDAOHardFork(vmdb ethvm.StateDB) {
 func applyTransaction(
 	ctx sdk.Context, config *ethparams.ChainConfig, bc ethcore.ChainContext, author *common.Address,
 	gp *ethcore.GasPool, evmKeeper *evmkeeper.Keeper, vmdb *statedb.StateDB, header *ethtypes.Header,
-	tx *ethtypes.Transaction, usedGas *uint64, cfg ethvm.Config,
+	tx *ethtypes.Transaction, usedGas *uint64, cfg ethvm.Config, index uint,
 ) (*ethtypes.Receipt, uint64, error) {
 	msg, err := ethcore.TransactionToMessage(tx, ethtypes.MakeSigner(config, header.Number), sdkmath.ZeroInt().BigInt())
 	if err != nil {
@@ -271,7 +271,7 @@ func applyTransaction(
 	receipt.Bloom = ethtypes.CreateBloom(ethtypes.Receipts{receipt})
 	receipt.BlockHash = header.Hash()
 	receipt.BlockNumber = header.Number
-	receipt.TransactionIndex = uint(evmKeeper.GetTxIndexTransient(ctx))
+	receipt.TransactionIndex = index
 
 	return receipt, execResult.UsedGas, err
 }

x/evm/keeper/abci.go

@@ -19,8 +19,6 @@ import (
 	"cosmossdk.io/store/types"
 
 	sdk "github.com/cosmos/cosmos-sdk/types"
-
-	ethtypes "github.com/ethereum/go-ethereum/core/types"
 )
 
 // BeginBlock sets the sdk Context and EIP155 chain id to the Keeper.
@@ -35,9 +33,6 @@ func (k *Keeper) BeginBlock(ctx sdk.Context) error {
 func (k *Keeper) EndBlock(ctx sdk.Context) error {
 	// Gas costs are handled within msg handler so costs should be ignored
 	infCtx := ctx.WithGasMeter(types.NewInfiniteGasMeter())
-
-	bloom := ethtypes.BytesToBloom(k.GetBlockBloomTransient(infCtx).Bytes())
-	k.EmitBlockBloomEvent(infCtx, bloom)
-
+	k.CollectTxBloom(infCtx)
 	return nil
 }

x/evm/keeper/bloom.go

@@ -0,0 +1,27 @@
+package keeper
+
+import (
+	"math/big"
+
+	"cosmossdk.io/store/prefix"
+	sdk "github.com/cosmos/cosmos-sdk/types"
+	"github.com/evmos/ethermint/x/evm/types"
+)
+
+func (k Keeper) SetTxBloom(ctx sdk.Context, bloom []byte) {
+	store := ctx.KVStore(k.transientKey)
+	store.Set(types.TransientBloomKey(ctx.TxIndex(), ctx.MsgIndex()), bloom)
+}
+
+func (k Keeper) CollectTxBloom(ctx sdk.Context) {
+	store := prefix.NewStore(ctx.KVStore(k.transientKey), types.KeyPrefixTransientBloom)
+	it := store.Iterator(nil, nil)
+	defer it.Close()
+
+	bloom := new(big.Int)
+	for ; it.Valid(); it.Next() {
+		bloom.Or(bloom, big.NewInt(0).SetBytes(it.Value()))
+	}
+
+	k.EmitBlockBloomEvent(ctx, bloom.Bytes())
+}

x/evm/keeper/config.go

@@ -89,8 +89,7 @@ func (k *Keeper) TxConfig(ctx sdk.Context, txHash common.Hash) statedb.TxConfig
 	return statedb.NewTxConfig(
 		common.BytesToHash(ctx.HeaderHash()), // BlockHash
 		txHash,                               // TxHash
-		uint(k.GetTxIndexTransient(ctx)),     // TxIndex
-		uint(k.GetLogSizeTransient(ctx)),     // LogIndex
+		0, 0,
 	)
 }
 

x/evm/keeper/keeper.go

@@ -146,11 +146,11 @@ func (k Keeper) ChainID() *big.Int {
 // ----------------------------------------------------------------------------
 
 // EmitBlockBloomEvent emit block bloom events
-func (k Keeper) EmitBlockBloomEvent(ctx sdk.Context, bloom ethtypes.Bloom) {
+func (k Keeper) EmitBlockBloomEvent(ctx sdk.Context, bloom []byte) {
 	ctx.EventManager().EmitEvent(
 		sdk.NewEvent(
 			types.EventTypeBlockBloom,
-			sdk.NewAttribute(types.AttributeKeyEthereumBloom, string(bloom.Bytes())),
+			sdk.NewAttribute(types.AttributeKeyEthereumBloom, string(bloom)),
 		),
 	)
 }
@@ -180,49 +180,6 @@ func (k Keeper) SetBlockBloomTransient(ctx sdk.Context, bloom *big.Int) {
 	store.Set(heightBz, bloom.Bytes())
 }
 
-// ----------------------------------------------------------------------------
-// Tx
-// ----------------------------------------------------------------------------
-
-// SetTxIndexTransient set the index of processing transaction
-func (k Keeper) SetTxIndexTransient(ctx sdk.Context, index uint64) {
-	store := ctx.TransientStore(k.transientKey)
-	store.Set(types.KeyPrefixTransientTxIndex, sdk.Uint64ToBigEndian(index))
-}
-
-// GetTxIndexTransient returns EVM transaction index on the current block.
-func (k Keeper) GetTxIndexTransient(ctx sdk.Context) uint64 {
-	store := ctx.TransientStore(k.transientKey)
-	bz := store.Get(types.KeyPrefixTransientTxIndex)
-	if len(bz) == 0 {
-		return 0
-	}
-
-	return sdk.BigEndianToUint64(bz)
-}
-
-// ----------------------------------------------------------------------------
-// Log
-// ----------------------------------------------------------------------------
-
-// GetLogSizeTransient returns EVM log index on the current block.
-func (k Keeper) GetLogSizeTransient(ctx sdk.Context) uint64 {
-	store := ctx.TransientStore(k.transientKey)
-	bz := store.Get(types.KeyPrefixTransientLogSize)
-	if len(bz) == 0 {
-		return 0
-	}
-
-	return sdk.BigEndianToUint64(bz)
-}
-
-// SetLogSizeTransient fetches the current EVM log index from the transient store, increases its
-// value by one and then sets the new index back to the transient store.
-func (k Keeper) SetLogSizeTransient(ctx sdk.Context, logSize uint64) {
-	store := ctx.TransientStore(k.transientKey)
-	store.Set(types.KeyPrefixTransientLogSize, sdk.Uint64ToBigEndian(logSize))
-}
-
 // ----------------------------------------------------------------------------
 // Storage
 // ----------------------------------------------------------------------------
@@ -349,16 +306,10 @@ func (k Keeper) getBaseFee(ctx sdk.Context, london bool) *big.Int {
 	return baseFee
 }
 
-// ResetTransientGasUsed reset gas used to prepare for execution of current cosmos tx, called in ante handler.
-func (k Keeper) ResetTransientGasUsed(ctx sdk.Context) {
-	store := ctx.TransientStore(k.transientKey)
-	store.Delete(types.KeyPrefixTransientGasUsed)
-}
-
 // GetTransientGasUsed returns the gas used by current cosmos tx.
 func (k Keeper) GetTransientGasUsed(ctx sdk.Context) uint64 {
 	store := ctx.TransientStore(k.transientKey)
-	bz := store.Get(types.KeyPrefixTransientGasUsed)
+	bz := store.Get(types.TransientGasUsedKey(ctx.TxIndex()))
 	if len(bz) == 0 {
 		return 0
 	}
@@ -369,7 +320,7 @@ func (k Keeper) GetTransientGasUsed(ctx sdk.Context) uint64 {
 func (k Keeper) SetTransientGasUsed(ctx sdk.Context, gasUsed uint64) {
 	store := ctx.TransientStore(k.transientKey)
 	bz := sdk.Uint64ToBigEndian(gasUsed)
-	store.Set(types.KeyPrefixTransientGasUsed, bz)
+	store.Set(types.TransientGasUsedKey(ctx.TxIndex()), bz)
 }
 
 // AddTransientGasUsed accumulate gas used by each eth msgs included in current cosmos tx.

x/evm/keeper/msg_server.go

@@ -44,7 +44,6 @@ func (k *Keeper) EthereumTx(goCtx context.Context, msg *types.MsgEthereumTx) (*t
 	ctx := sdk.UnwrapSDKContext(goCtx)
 
 	tx := msg.AsTransaction()
-	txIndex := k.GetTxIndexTransient(ctx)
 
 	labels := []metrics.Label{
 		telemetry.NewLabel("tx_type", fmt.Sprintf("%d", tx.Type())),
@@ -92,8 +91,6 @@ func (k *Keeper) EthereumTx(goCtx context.Context, msg *types.MsgEthereumTx) (*t
 		sdk.NewAttribute(sdk.AttributeKeyAmount, tx.Value().String()),
 		// add event for ethereum transaction hash format
 		sdk.NewAttribute(types.AttributeKeyEthereumTxHash, response.Hash),
-		// add event for index of valid ethereum tx
-		sdk.NewAttribute(types.AttributeKeyTxIndex, strconv.FormatUint(txIndex, 10)),
 		// add event for eth tx gas used, we can't get it from cosmos tx result when it contains multiple eth tx msgs.
 		sdk.NewAttribute(types.AttributeKeyTxGasUsed, strconv.FormatUint(response.GasUsed, 10)),
 	}

x/evm/keeper/state_transition.go

@@ -168,11 +168,6 @@
 //
 // For relevant discussion see: https://github.com/cosmos/cosmos-sdk/discussions/9072
 func (k *Keeper) ApplyTransaction(ctx sdk.Context, msgEth *types.MsgEthereumTx) (*types.MsgEthereumTxResponse, error) {
-	var (
-		bloom        *big.Int
-		bloomReceipt ethtypes.Bloom
-	)
-
 	ethTx := msgEth.AsTransaction()
 	cfg, err := k.EVMConfig(ctx, sdk.ConsAddress(ctx.BlockHeader().ProposerAddress), k.eip155ChainID, ethTx.Hash())
 	if err != nil {
@@ -205,9 +200,7 @@
 
 	// Compute block bloom filter
 	if len(logs) > 0 {
-		bloom = k.GetBlockBloomTransient(ctx)
-		bloom.Or(bloom, big.NewInt(0).SetBytes(ethtypes.LogsBloom(logs)))
-		bloomReceipt = ethtypes.BytesToBloom(bloom.Bytes())
+		k.SetTxBloom(tmpCtx, ethtypes.LogsBloom(logs))
 	}
 
 	cumulativeGasUsed := res.GasUsed
@@ -228,14 +221,12 @@
 		Type:              ethTx.Type(),
 		PostState:         nil, // TODO: intermediate state root
 		CumulativeGasUsed: cumulativeGasUsed,
-		Bloom:             bloomReceipt,
 		Logs:              logs,
 		TxHash:            cfg.TxConfig.TxHash,
 		ContractAddress:   contractAddr,
 		GasUsed:           res.GasUsed,
 		BlockHash:         cfg.TxConfig.BlockHash,
 		BlockNumber:       big.NewInt(ctx.BlockHeight()),
-		TransactionIndex:  cfg.TxConfig.TxIndex,
 	}
 
 	if !res.Failed() {
@@ -258,17 +249,9 @@
 
 	// refund gas in order to match the Ethereum gas consumption instead of the default SDK one.
 	if err = k.RefundGas(ctx, msg, msg.GasLimit-res.GasUsed, cfg.Params.EvmDenom); err != nil {
-		return nil, errorsmod.Wrapf(err, "failed to refund gas leftover gas to sender %s", msg.From)
+		return nil, errorsmod.Wrapf(err, "failed to refund leftover gas to sender %s", msg.From)
 	}
 
-	if len(receipt.Logs) > 0 {
-		// Update transient block bloom filter
-		k.SetBlockBloomTransient(ctx, receipt.Bloom.Big())
-		k.SetLogSizeTransient(ctx, uint64(cfg.TxConfig.LogIndex)+uint64(len(receipt.Logs)))
-	}
-
-	k.SetTxIndexTransient(ctx, uint64(cfg.TxConfig.TxIndex)+1)
-
 	totalGasUsed, err := k.AddTransientGasUsed(ctx, res.GasUsed)
 	if err != nil {
 		return nil, errorsmod.Wrap(err, "failed to add transient gas used")

x/evm/types/key.go

@@ -16,6 +16,8 @@
 package types
 
 import (
+	"encoding/binary"
+
 	"github.com/ethereum/go-ethereum/common"
 )
 
@@ -46,8 +48,6 @@
 // prefix bytes for the EVM transient store
 const (
 	prefixTransientBloom = iota + 1
-	prefixTransientTxIndex
-	prefixTransientLogSize
 	prefixTransientGasUsed
 )
 
@@ -61,8 +61,6 @@
 // Transient Store key prefixes
 var (
 	KeyPrefixTransientBloom   = []byte{prefixTransientBloom}
-	KeyPrefixTransientTxIndex = []byte{prefixTransientTxIndex}
-	KeyPrefixTransientLogSize = []byte{prefixTransientLogSize}
 	KeyPrefixTransientGasUsed = []byte{prefixTransientGasUsed}
 )
 
@@ -75,3 +73,18 @@
 func StateKey(address common.Address, key []byte) []byte {
 	return append(AddressStoragePrefix(address), key...)
 }
+
+func TransientGasUsedKey(txIndex int) []byte {
+	var key [9]byte
+	key[0] = prefixTransientGasUsed
+	binary.BigEndian.PutUint64(key[1:], uint64(txIndex))
+	return key[:]
+}
+
+func TransientBloomKey(txIndex, msgIndex int) []byte {
+	var key [1 + 8 + 8]byte
+	key[0] = prefixTransientBloom
+	binary.BigEndian.PutUint64(key[1:], uint64(txIndex))
+	binary.BigEndian.PutUint64(key[9:], uint64(msgIndex))
+	return key[:]
+}