feat: allow non-ccc pipelines (#781)

miner/scroll_worker.go

@@ -517,7 +517,11 @@ func (w *worker) startNewPipeline(timestamp int64) {
 	}
 
 	w.currentPipelineStart = time.Now()
-	w.currentPipeline = pipeline.NewPipeline(w.chain, w.chain.GetVMConfig(), parentState, header, nextL1MsgIndex, w.getCCC()).WithBeforeTxHook(w.beforeTxHook)
+	pipelineCCC := w.getCCC()
+	if !w.isRunning() {
+		pipelineCCC = nil
+	}
+	w.currentPipeline = pipeline.NewPipeline(w.chain, w.chain.GetVMConfig(), parentState, header, nextL1MsgIndex, pipelineCCC).WithBeforeTxHook(w.beforeTxHook)
 
 	deadline := time.Unix(int64(header.Time), 0)
 	if w.chainConfig.Clique != nil && w.chainConfig.Clique.RelaxedPeriod {
@@ -579,11 +583,19 @@ func (w *worker) startNewPipeline(timestamp int64) {
 			return
 		}
 	}
+
+	// pipelineCCC was nil, so the block was built for RPC purposes only. Stop the pipeline immediately
+	// and update the pending block.
+	if pipelineCCC == nil {
+		w.currentPipeline.Stop()
+	}
 }
 
 func (w *worker) handlePipelineResult(res *pipeline.Result) error {
-	if !w.isRunning() {
+	// Rows being nil without an OverflowingTx means that block didn't go thru CCC,
-		if res != nil && res.FinalBlock != nil {
+	// which means that we are not the sequencer. Do not attempt to commit.
+	if res != nil && res.Rows == nil && res.OverflowingTx == nil {
+		if res.FinalBlock != nil {
 			w.updateSnapshot(res.FinalBlock)
 		}
 		w.currentPipeline.Release()

miner/scroll_worker_test.go

@@ -1045,3 +1045,47 @@ func TestSealBlockAfterCliquePeriod(t *testing.T) {
 		t.Fatalf("timeout")
 	}
 }
+
+func TestPending(t *testing.T) {
+	var (
+		engine      consensus.Engine
+		chainConfig *params.ChainConfig
+		db          = rawdb.NewMemoryDatabase()
+	)
+	chainConfig = params.AllCliqueProtocolChanges
+	chainConfig.Clique = &params.CliqueConfig{Period: 1, Epoch: 30000}
+	chainConfig.Scroll.FeeVaultAddress = &common.Address{}
+	engine = clique.New(chainConfig.Clique, db)
+	w, b := newTestWorker(t, chainConfig, engine, db, 0)
+	defer w.close()
+
+	// This test chain imports the mined blocks.
+	b.genesis.MustCommit(db)
+	chain, _ := core.NewBlockChain(db, nil, b.chain.Config(), engine, vm.Config{
+		Debug:  true,
+		Tracer: vm.NewStructLogger(&vm.LogConfig{EnableMemory: true, EnableReturnData: true})}, nil, nil)
+	defer chain.Stop()
+
+	// Define 3 transactions:
+	// A --> B (nonce: 0, gas: 20)
+	tx0, _ := types.SignTx(types.NewTransaction(b.txPool.Nonce(testBankAddress), testUserAddress, big.NewInt(100000000000000000), params.TxGas, big.NewInt(20*params.InitialBaseFee), nil), types.HomesteadSigner{}, testBankKey)
+	// A --> B (nonce: 1, gas: 5)
+	tx1, _ := types.SignTx(types.NewTransaction(b.txPool.Nonce(testBankAddress)+1, testUserAddress, big.NewInt(0), params.TxGas, big.NewInt(5*params.InitialBaseFee), nil), types.HomesteadSigner{}, testBankKey)
+	// B --> A (nonce: 0, gas: 20)
+	tx2, _ := types.SignTx(types.NewTransaction(b.txPool.Nonce(testUserAddress), testBankAddress, big.NewInt(0), params.TxGas, big.NewInt(20*params.InitialBaseFee), nil), types.HomesteadSigner{}, testUserKey)
+	// B --> A (nonce: 1, gas: 20)
+	tx3, _ := types.SignTx(types.NewTransaction(b.txPool.Nonce(testUserAddress)+1, testBankAddress, big.NewInt(0), params.TxGas, big.NewInt(20*params.InitialBaseFee), nil), types.HomesteadSigner{}, testUserKey)
+	// B --> A (nonce: 2, gas: 20)
+	tx4, _ := types.SignTx(types.NewTransaction(b.txPool.Nonce(testUserAddress)+2, testBankAddress, big.NewInt(0), params.TxGas, big.NewInt(20*params.InitialBaseFee), nil), types.HomesteadSigner{}, testUserKey)
+	// A --> B (nonce: 2, gas: 5)
+	tx5, _ := types.SignTx(types.NewTransaction(b.txPool.Nonce(testBankAddress)+2, testUserAddress, big.NewInt(0), params.TxGas, big.NewInt(5*params.InitialBaseFee), nil), types.HomesteadSigner{}, testBankKey)
+
+	b.txPool.AddRemotesSync([]*types.Transaction{tx0, tx1, tx2, tx3, tx4, tx5})
+	// start building pending block
+	w.startCh <- struct{}{}
+
+	time.Sleep(time.Second)
+	pending := w.pendingBlock()
+	assert.NotNil(t, pending)
+	assert.NotEmpty(t, pending.Transactions())
+}

params/version.go

@@ -24,7 +24,7 @@ import (
 const (
 	VersionMajor = 5         // Major version component of the current release
 	VersionMinor = 3         // Minor version component of the current release
-	VersionPatch = 30        // Patch version component of the current release
+	VersionPatch = 31        // Patch version component of the current release
 	VersionMeta  = "mainnet" // Version metadata to append to the version string
 )
 

rollup/pipeline/pipeline.go

@@ -110,6 +110,14 @@ func (p *Pipeline) Start(deadline time.Time) error {
 	return nil
 }
 
+// Stop forces pipeline to stop its operation and return whatever progress it has so far
+func (p *Pipeline) Stop() {
+	if p.txnQueue != nil {
+		close(p.txnQueue)
+		p.txnQueue = nil
+	}
+}
+
 func (p *Pipeline) TryPushTxns(txs types.OrderedTransactionSet, onFailingTxn func(txnIndex int, tx *types.Transaction, err error) bool) *Result {
 	for {
 		tx := txs.Peek()
@@ -127,8 +135,7 @@ func (p *Pipeline) TryPushTxns(txs types.OrderedTransactionSet, onFailingTxn fun
 			txs.Shift()
 		default:
 			if errors.Is(err, ErrApplyStageDone) || onFailingTxn(p.txs.Len(), tx, err) {
-				close(p.txnQueue)
+				p.Stop()
-				p.txnQueue = nil
 				return nil
 			}
 
@@ -167,10 +174,7 @@ func (p *Pipeline) TryPushTxn(tx *types.Transaction) (*Result, error) {
 
 // Release releases all resources related to the pipeline
 func (p *Pipeline) Release() {
-	if p.txnQueue != nil {
+	p.Stop()
-		close(p.txnQueue)
-		p.txnQueue = nil
-	}
 
 	select {
 	case <-p.applyStageRespCh:
@@ -303,7 +307,9 @@ type Result struct {
 }
 
 func (p *Pipeline) cccStage(candidates <-chan *BlockCandidate, deadline time.Time) <-chan *Result {
+	if p.ccc != nil {
 		p.ccc.Reset()
+	}
 	resultCh := make(chan *Result)
 	var lastCandidate *BlockCandidate
 	var lastAccRows *types.RowConsumption
@@ -335,7 +341,7 @@ func (p *Pipeline) cccStage(candidates <-chan *BlockCandidate, deadline time.Tim
 				cccStart := time.Now()
 				var accRows *types.RowConsumption
 				var err error
-				if candidate != nil {
+				if candidate != nil && p.ccc != nil {
 					accRows, err = p.ccc.ApplyTransaction(candidate.LastTrace)
 					lastTxn := candidate.Txs[candidate.Txs.Len()-1]
 					cccTimer.UpdateSince(cccStart)
@@ -352,6 +358,8 @@ func (p *Pipeline) cccStage(candidates <-chan *BlockCandidate, deadline time.Tim
 
 					lastCandidate = candidate
 					lastAccRows = accRows
+				} else if candidate != nil && p.ccc == nil {
+					lastCandidate = candidate
 				}
 
 				// immediately close the block if deadline reached or apply stage is done
@@ -381,6 +389,7 @@ func (p *Pipeline) traceAndApply(tx *types.Transaction) (*types.Receipt, *types.
 		return nil, nil, core.ErrGasLimitReached
 	}
 
+	if p.ccc != nil {
 		// don't commit the state during tracing for circuit capacity checker, otherwise we cannot revert.
 		// and even if we don't commit the state, the `refund` value will still be correct, as explained in `CommitTransaction`
 		commitStateAfterApply := false
@@ -401,9 +410,10 @@ func (p *Pipeline) traceAndApply(tx *types.Transaction) (*types.Receipt, *types.
 		if err != nil {
 			return nil, nil, err
 		}
+	}
 
 	// create new snapshot for `core.ApplyTransaction`
-	snap = p.state.Snapshot()
+	snap := p.state.Snapshot()
 
 	var receipt *types.Receipt
 	receipt, err = core.ApplyTransaction(p.chain.Config(), p.chain, nil /* coinbase will default to chainConfig.Scroll.FeeVaultAddress */, p.gasPool,