Problem: parallel tx execution is not supported

add basic support in sdk:
- add a TxExecutor baseapp option
- add TxIndex/TxCount/MsgIndex in context

Update CHANGELOG.md

Signed-off-by: yihuang <[email protected]>

fix misspell

fix lint

run gci

fix lint

gci seems not compatible with gofumpt

.golangci.yml

@@ -20,7 +20,6 @@ linters:
     - exportloopref
     - goconst
     - gocritic
-    - gci
     - gofumpt
     - gosec
     - gosimple
@@ -63,14 +62,6 @@ issues:
   max-same-issues: 10000
 
 linters-settings:
-  gci:
-    custom-order: true
-    sections:
-      - standard # Standard section: captures all standard packages.
-      - default # Default section: contains all imports that could not be matched to another section type.
-      - prefix(cosmossdk.io)
-      - prefix(github.com/cosmos/cosmos-sdk)
-
   gosec:
     # To select a subset of rules to run.
     # Available rules: https://github.com/securego/gosec#available-rules

CHANGELOG.md

@@ -38,7 +38,13 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ## [Unreleased]
 
-## Bug Fixes
+### Features
+
+* (baseapp) [#205](https://github.com/crypto-org-chain/cosmos-sdk/pull/205) Add `TxExecutor` baseapp option, add `TxIndex`/`TxCount`/`MsgIndex`/`BlockGasUsed` fields to `Context, to support tx parallel execution.
+
+## [Unreleased-Upstream]
+
+### Bug Fixes
 
 * (crypto) [#19691](https://github.com/cosmos/cosmos-sdk/pull/19745) Fix tx sign doesn't throw an error when incorrect Ledger is used.
 

baseapp/abci.go

@@ -336,11 +336,11 @@ func (app *BaseApp) ApplySnapshotChunk(req *abci.RequestApplySnapshotChunk) (*ab
 func (app *BaseApp) CheckTx(req *abci.RequestCheckTx) (*abci.ResponseCheckTx, error) {
 	var mode execMode
 
-	switch {
-	case req.Type == abci.CheckTxType_New:
+	switch req.Type {
+	case abci.CheckTxType_New:
 		mode = execModeCheck
 
-	case req.Type == abci.CheckTxType_Recheck:
+	case abci.CheckTxType_Recheck:
 		mode = execModeReCheck
 
 	default:
@@ -775,48 +775,34 @@ func (app *BaseApp) internalFinalizeBlock(ctx context.Context, req *abci.Request
 
 	// Reset the gas meter so that the AnteHandlers aren't required to
 	gasMeter = app.getBlockGasMeter(app.finalizeBlockState.Context())
-	app.finalizeBlockState.SetContext(app.finalizeBlockState.Context().WithBlockGasMeter(gasMeter))
+	app.finalizeBlockState.SetContext(
+		app.finalizeBlockState.Context().
+			WithBlockGasMeter(gasMeter).
+			WithTxCount(len(req.Txs)),
+	)
 
 	// Iterate over all raw transactions in the proposal and attempt to execute
 	// them, gathering the execution results.
 	//
 	// NOTE: Not all raw transactions may adhere to the sdk.Tx interface, e.g.
 	// vote extensions, so skip those.
-	txResults := make([]*abci.ExecTxResult, 0, len(req.Txs))
-	for _, rawTx := range req.Txs {
-		var response *abci.ExecTxResult
-
-		if _, err := app.txDecoder(rawTx); err == nil {
-			response = app.deliverTx(rawTx)
-		} else {
-			// In the case where a transaction included in a block proposal is malformed,
-			// we still want to return a default response to comet. This is because comet
-			// expects a response for each transaction included in a block proposal.
-			response = sdkerrors.ResponseExecTxResultWithEvents(
-				sdkerrors.ErrTxDecode,
-				0,
-				0,
-				nil,
-				false,
-			)
-		}
-
-		// check after every tx if we should abort
-		select {
-		case <-ctx.Done():
-			return nil, ctx.Err()
-		default:
-			// continue
-		}
-
-		txResults = append(txResults, response)
+	txResults, err := app.executeTxs(ctx, req.Txs)
+	if err != nil {
+		// usually due to canceled
+		return nil, err
 	}
 
 	if app.finalizeBlockState.ms.TracingEnabled() {
 		app.finalizeBlockState.ms = app.finalizeBlockState.ms.SetTracingContext(nil).(storetypes.CacheMultiStore)
 	}
 
-	endBlock, err := app.endBlock(app.finalizeBlockState.Context())
+	var blockGasUsed uint64
+	for _, res := range txResults {
+		blockGasUsed += uint64(res.GasUsed)
+	}
+	sdkCtx := app.finalizeBlockState.Context().WithBlockGasUsed(blockGasUsed)
+
+	endBlock, err := app.endBlock(sdkCtx)
 	if err != nil {
 		return nil, err
 	}
@@ -840,6 +826,45 @@ func (app *BaseApp) internalFinalizeBlock(ctx context.Context, req *abci.Request
 	}, nil
 }
 
+func (app *BaseApp) executeTxs(ctx context.Context, txs [][]byte) ([]*abci.ExecTxResult, error) {
+	if app.txExecutor != nil {
+		return app.txExecutor(ctx, len(txs), app.finalizeBlockState.ms, func(i int, ms storetypes.MultiStore) *abci.ExecTxResult {
+			return app.deliverTxWithMultiStore(txs[i], i, ms)
+		})
+	}
+
+	txResults := make([]*abci.ExecTxResult, 0, len(txs))
+	for i, rawTx := range txs {
+		var response *abci.ExecTxResult
+
+		if _, err := app.txDecoder(rawTx); err == nil {
+			response = app.deliverTx(rawTx, i)
+		} else {
+			// In the case where a transaction included in a block proposal is malformed,
+			// we still want to return a default response to comet. This is because comet
+			// expects a response for each transaction included in a block proposal.
+			response = sdkerrors.ResponseExecTxResultWithEvents(
+				sdkerrors.ErrTxDecode,
+				0,
+				0,
+				nil,
+				false,
+			)
+		}
+
+		// check after every tx if we should abort
+		select {
+		case <-ctx.Done():
+			return nil, ctx.Err()
+		default:
+			// continue
+		}
+
+		txResults = append(txResults, response)
+	}
+	return txResults, nil
+}
+
 // FinalizeBlock will execute the block proposal provided by RequestFinalizeBlock.
 // Specifically, it will execute an application's BeginBlock (if defined), followed
 // by the transactions in the proposal, finally followed by the application's

baseapp/baseapp.go

@@ -193,6 +193,9 @@ type BaseApp struct {
 	//
 	// SAFETY: it's safe to do if validators validate the total gas wanted in the `ProcessProposal`, which is the case in the default handler.
 	disableBlockGasMeter bool
+
+	// Optional alternative tx executor, used for block-stm parallel transaction execution.
+	txExecutor TxExecutor
 }
 
 // NewBaseApp returns a reference to an initialized BaseApp. It accepts a
@@ -659,13 +662,14 @@ func (app *BaseApp) getBlockGasMeter(ctx sdk.Context) storetypes.GasMeter {
 }
 
 // retrieve the context for the tx w/ txBytes and other memoized values.
-func (app *BaseApp) getContextForTx(mode execMode, txBytes []byte) sdk.Context {
+func (app *BaseApp) getContextForTx(mode execMode, txBytes []byte, txIndex int) sdk.Context {
 	modeState := app.getState(mode)
 	if modeState == nil {
 		panic(fmt.Sprintf("state is nil for mode %v", mode))
 	}
 	ctx := modeState.Context().
-		WithTxBytes(txBytes)
+		WithTxBytes(txBytes).
+		WithTxIndex(txIndex)
 	// WithVoteInfos(app.voteInfos) // TODO: identify if this is needed
 
 	ctx = ctx.WithConsensusParams(app.GetConsensusParams(ctx))
@@ -746,7 +750,11 @@ func (app *BaseApp) beginBlock(req *abci.RequestFinalizeBlock) (sdk.BeginBlock,
 	return resp, nil
 }
 
-func (app *BaseApp) deliverTx(tx []byte) *abci.ExecTxResult {
+func (app *BaseApp) deliverTx(tx []byte, txIndex int) *abci.ExecTxResult {
+	return app.deliverTxWithMultiStore(tx, txIndex, nil)
+}
+
+func (app *BaseApp) deliverTxWithMultiStore(tx []byte, txIndex int, txMultiStore storetypes.MultiStore) *abci.ExecTxResult {
 	gInfo := sdk.GasInfo{}
 	resultStr := "successful"
 
@@ -759,7 +767,7 @@ func (app *BaseApp) deliverTx(tx []byte) *abci.ExecTxResult {
 		telemetry.SetGauge(float32(gInfo.GasWanted), "tx", "gas", "wanted")
 	}()
 
-	gInfo, result, anteEvents, err := app.runTx(execModeFinalize, tx)
+	gInfo, result, anteEvents, err := app.runTxWithMultiStore(execModeFinalize, tx, txIndex, txMultiStore)
 	if err != nil {
 		resultStr = "failed"
 		resp = sdkerrors.ResponseExecTxResultWithEvents(
@@ -817,12 +825,19 @@ func (app *BaseApp) endBlock(ctx context.Context) (sdk.EndBlock, error) {
 // returned if the tx does not run out of gas and if all the messages are valid
 // and execute successfully. An error is returned otherwise.
 func (app *BaseApp) runTx(mode execMode, txBytes []byte) (gInfo sdk.GasInfo, result *sdk.Result, anteEvents []abci.Event, err error) {
+	return app.runTxWithMultiStore(mode, txBytes, -1, nil)
+}
+
+func (app *BaseApp) runTxWithMultiStore(mode execMode, txBytes []byte, txIndex int, txMultiStore storetypes.MultiStore) (gInfo sdk.GasInfo, result *sdk.Result, anteEvents []abci.Event, err error) {
 	// NOTE: GasWanted should be returned by the AnteHandler. GasUsed is
 	// determined by the GasMeter. We need access to the context to get the gas
 	// meter, so we initialize upfront.
 	var gasWanted uint64
 
-	ctx := app.getContextForTx(mode, txBytes)
+	ctx := app.getContextForTx(mode, txBytes, txIndex)
+	if txMultiStore != nil {
+		ctx = ctx.WithMultiStore(txMultiStore)
+	}
 	ms := ctx.MultiStore()
 
 	// only run the tx if there is block gas remaining
@@ -1000,6 +1015,8 @@ func (app *BaseApp) runMsgs(ctx sdk.Context, msgs []sdk.Msg, msgsV2 []protov2.Me
 			break
 		}
 
+		ctx = ctx.WithMsgIndex(i)
+
 		handler := app.msgServiceRouter.Handler(msg)
 		if handler == nil {
 			return nil, errorsmod.Wrapf(sdkerrors.ErrUnknownRequest, "no message handler found for %T", msg)

baseapp/genesis.go

@@ -13,7 +13,7 @@ var _ genesis.TxHandler = (*BaseApp)(nil)
 // ExecuteGenesisTx implements genesis.GenesisState from
 // cosmossdk.io/core/genesis to set initial state in genesis
 func (ba BaseApp) ExecuteGenesisTx(tx []byte) error {
-	res := ba.deliverTx(tx)
+	res := ba.deliverTx(tx, -1)
 
 	if res.Code != types.CodeTypeOK {
 		return errors.New(res.Log)

baseapp/options.go

@@ -122,6 +122,11 @@ func DisableBlockGasMeter() func(*BaseApp) {
 	return func(app *BaseApp) { app.SetDisableBlockGasMeter(true) }
 }
 
+// SetTxExecutor sets a custom tx executor for the BaseApp, usually for parallel execution.
+func SetTxExecutor(executor TxExecutor) func(*BaseApp) {
+	return func(app *BaseApp) { app.txExecutor = executor }
+}
+
 func (app *BaseApp) SetName(name string) {
 	if app.sealed {
 		panic("SetName() on sealed BaseApp")
@@ -372,3 +377,8 @@ func (app *BaseApp) SetStreamingManager(manager storetypes.StreamingManager) {
 func (app *BaseApp) SetDisableBlockGasMeter(disableBlockGasMeter bool) {
 	app.disableBlockGasMeter = disableBlockGasMeter
 }
+
+// SetTxExecutor sets a custom tx executor for the BaseApp, usually for parallel execution.
+func (app *BaseApp) SetTxExecutor(executor TxExecutor) {
+	app.txExecutor = executor
+}

baseapp/test_helpers.go

@@ -70,9 +70,9 @@ func (app *BaseApp) NewUncachedContext(isCheckTx bool, header cmtproto.Header) s
 }
 
 func (app *BaseApp) GetContextForFinalizeBlock(txBytes []byte) sdk.Context {
-	return app.getContextForTx(execModeFinalize, txBytes)
+	return app.getContextForTx(execModeFinalize, txBytes, -1)
 }
 
 func (app *BaseApp) GetContextForCheckTx(txBytes []byte) sdk.Context {
-	return app.getContextForTx(execModeCheck, txBytes)
+	return app.getContextForTx(execModeCheck, txBytes, -1)
 }

baseapp/txexecutor.go

@@ -0,0 +1,16 @@
+package baseapp
+
+import (
+	"context"
+
+	abci "github.com/cometbft/cometbft/abci/types"
+
+	"cosmossdk.io/store/types"
+)
+
+type TxExecutor func(
+	ctx context.Context,
+	blockSize int,
+	cms types.MultiStore,
+	deliverTxWithMultiStore func(int, types.MultiStore) *abci.ExecTxResult,
+) ([]*abci.ExecTxResult, error)

types/context.go

@@ -64,6 +64,15 @@ type Context struct {
 	streamingManager     storetypes.StreamingManager
 	cometInfo            comet.BlockInfo
 	headerInfo           header.Info
+
+	// the index of the current tx in the block, -1 means not in finalize block context
+	txIndex int
+	// the index of the current msg in the tx, -1 means not in finalize block context
+	msgIndex int
+	// the total number of transactions in current block
+	txCount int
+	// sum the gas used by all the transactions in the current block, only accessible by end blocker
+	blockGasUsed uint64
 }
 
 // Proposed rename, not done to avoid API breakage
@@ -91,6 +100,10 @@ func (c Context) TransientKVGasConfig() storetypes.GasConfig    { return c.trans
 func (c Context) StreamingManager() storetypes.StreamingManager { return c.streamingManager }
 func (c Context) CometInfo() comet.BlockInfo                    { return c.cometInfo }
 func (c Context) HeaderInfo() header.Info                       { return c.headerInfo }
+func (c Context) TxIndex() int                                  { return c.txIndex }
+func (c Context) MsgIndex() int                                 { return c.msgIndex }
+func (c Context) TxCount() int                                  { return c.txCount }
+func (c Context) BlockGasUsed() uint64                          { return c.blockGasUsed }
 
 // clone the header before returning
 func (c Context) BlockHeader() cmtproto.Header {
@@ -137,6 +150,8 @@ func NewContext(ms storetypes.MultiStore, header cmtproto.Header, isCheckTx bool
 		eventManager:         NewEventManager(),
 		kvGasConfig:          storetypes.KVGasConfig(),
 		transientKVGasConfig: storetypes.TransientGasConfig(),
+		txIndex:              -1,
+		msgIndex:             -1,
 	}
 }
 
@@ -310,6 +325,26 @@ func (c Context) WithHeaderInfo(headerInfo header.Info) Context {
 	return c
 }
 
+func (c Context) WithTxIndex(txIndex int) Context {
+	c.txIndex = txIndex
+	return c
+}
+
+func (c Context) WithTxCount(txCount int) Context {
+	c.txCount = txCount
+	return c
+}
+
+func (c Context) WithMsgIndex(msgIndex int) Context {
+	c.msgIndex = msgIndex
+	return c
+}
+
+func (c Context) WithBlockGasUsed(gasUsed uint64) Context {
+	c.blockGasUsed = gasUsed
+	return c
+}
+
 // TODO: remove???
 func (c Context) IsZero() bool {
 	return c.ms == nil