feat(batcher): multi-frame altda channels

op-batcher/batcher/channel.go

@@ -135,22 +135,22 @@ func (c *channel) ID() derive.ChannelID {
 // NextTxData should only be called after HasTxData returned true.
 func (c *channel) NextTxData() txData {
 	nf := c.cfg.MaxFramesPerTx()
-	txdata := txData{frames: make([]frameData, 0, nf), asBlob: c.cfg.UseBlobs}
+	txdata := txData{frames: make([]frameData, 0, nf), daType: c.cfg.DaType}
 	for i := 0; i < nf && c.channelBuilder.HasFrame(); i++ {
 		frame := c.channelBuilder.NextFrame()
 		txdata.frames = append(txdata.frames, frame)
 	}
 
 	id := txdata.ID().String()
-	c.log.Debug("returning next tx data", "id", id, "num_frames", len(txdata.frames), "as_blob", txdata.asBlob)
+	c.log.Debug("returning next tx data", "id", id, "num_frames", len(txdata.frames), "da_type", txdata.daType)
 	c.pendingTransactions[id] = txdata
 
 	return txdata
 }
 
 func (c *channel) HasTxData() bool {
 	if c.IsFull() || // If the channel is full, we should start to submit it
-		!c.cfg.UseBlobs { // If using calldata, we only send one frame per tx
+		c.cfg.DaType == DaTypeCalldata { // If using calldata, we only send one frame per tx
 		return c.channelBuilder.HasFrame()
 	}
 	// Collect enough frames if channel is not full yet

op-batcher/batcher/channel_config.go

@@ -46,9 +46,12 @@ type ChannelConfig struct {
 	// BatchType indicates whether the channel uses SingularBatch or SpanBatch.
 	BatchType uint
 
-	// UseBlobs indicates that this channel should be sent as a multi-blob
-	// transaction with one blob per frame.
-	UseBlobs bool
+	// DaType indicates how the frames in this channel should be sent to the L1.
+	DaType DaType
+}
+
+func (cc ChannelConfig) UseBlobs() bool {
+	return cc.DaType == DaTypeBlob
 }
 
 // ChannelConfig returns a copy of the receiver.
@@ -93,7 +96,7 @@ func (cc *ChannelConfig) ReinitCompressorConfig() {
 }
 
 func (cc *ChannelConfig) MaxFramesPerTx() int {
-	if !cc.UseBlobs {
+	if cc.DaType == DaTypeCalldata {
 		return 1
 	}
 	return cc.TargetNumFrames

op-batcher/batcher/channel_config_provider_test.go

@@ -31,11 +31,12 @@ func TestDynamicEthChannelConfig_ChannelConfig(t *testing.T) {
 	calldataCfg := ChannelConfig{
 		MaxFrameSize:    120_000 - 1,
 		TargetNumFrames: 1,
+		DaType:          DaTypeCalldata,
 	}
 	blobCfg := ChannelConfig{
 		MaxFrameSize:    eth.MaxBlobDataSize - 1,
 		TargetNumFrames: 3, // gets closest to amortized fixed tx costs
-		UseBlobs:        true,
+		DaType:          DaTypeBlob,
 	}
 
 	tests := []struct {

op-batcher/batcher/channel_manager.go

@@ -186,16 +186,16 @@ func (s *channelManager) TxData(l1Head eth.BlockID) (txData, error) {
 	newCfg := s.cfgProvider.ChannelConfig()
 
 	// No change:
-	if newCfg.UseBlobs == s.defaultCfg.UseBlobs {
+	if newCfg.UseBlobs() == s.defaultCfg.UseBlobs() {
 		s.log.Debug("Recomputing optimal ChannelConfig: no need to switch DA type",
-			"useBlobs", s.defaultCfg.UseBlobs)
+			"useBlobs", s.defaultCfg.UseBlobs())
 		return s.nextTxData(channel)
 	}
 
 	// Change:
 	s.log.Info("Recomputing optimal ChannelConfig: changing DA type and requeing blocks...",
-		"useBlobsBefore", s.defaultCfg.UseBlobs,
-		"useBlobsAfter", newCfg.UseBlobs)
+		"useBlobsBefore", s.defaultCfg.UseBlobs(),
+		"useBlobsAfter", newCfg.UseBlobs())
 	s.Requeue(newCfg)
 	channel, err = s.getReadyChannel(l1Head)
 	if err != nil {
@@ -294,7 +294,7 @@ func (s *channelManager) ensureChannelWithSpace(l1Head eth.BlockID) error {
 		"compression_algo", cfg.CompressorConfig.CompressionAlgo,
 		"target_num_frames", cfg.TargetNumFrames,
 		"max_frame_size", cfg.MaxFrameSize,
-		"use_blobs", cfg.UseBlobs,
+		"da_type", cfg.DaType,
 	)
 	s.metr.RecordChannelOpened(pc.ID(), s.blocks.Len())
 

op-batcher/batcher/channel_manager_test.go

@@ -509,11 +509,12 @@ func newFakeDynamicEthChannelConfig(lgr log.Logger,
 	calldataCfg := ChannelConfig{
 		MaxFrameSize:    120_000 - 1,
 		TargetNumFrames: 1,
+		DaType:          DaTypeCalldata,
 	}
 	blobCfg := ChannelConfig{
 		MaxFrameSize:    eth.MaxBlobDataSize - 1,
 		TargetNumFrames: 3, // gets closest to amortized fixed tx costs
-		UseBlobs:        true,
+		DaType:          DaTypeBlob,
 	}
 	calldataCfg.InitNoneCompressor()
 	blobCfg.InitNoneCompressor()
@@ -565,7 +566,7 @@ func TestChannelManager_TxData(t *testing.T) {
 
 			cfg.chooseBlobs = tc.chooseBlobsWhenChannelCreated
 			m := NewChannelManager(l, metrics.NoopMetrics, cfg, defaultTestRollupConfig)
-			require.Equal(t, tc.chooseBlobsWhenChannelCreated, m.defaultCfg.UseBlobs)
+			require.Equal(t, tc.chooseBlobsWhenChannelCreated, m.defaultCfg.DaType == DaTypeBlob)
 
 			// Seed channel manager with a block
 			rng := rand.New(rand.NewSource(99))
@@ -602,8 +603,8 @@ func TestChannelManager_TxData(t *testing.T) {
 			}
 
 			require.Equal(t, tc.numExpectedAssessments, cfg.assessments)
-			require.Equal(t, tc.chooseBlobsWhenChannelSubmitted, data.asBlob)
-			require.Equal(t, tc.chooseBlobsWhenChannelSubmitted, m.defaultCfg.UseBlobs)
+			require.Equal(t, tc.chooseBlobsWhenChannelSubmitted, data.daType == DaTypeBlob)
+			require.Equal(t, tc.chooseBlobsWhenChannelSubmitted, m.defaultCfg.DaType == DaTypeBlob)
 		})
 	}
 

op-batcher/batcher/channel_test.go

@@ -131,7 +131,7 @@ func TestChannel_NextTxData_singleFrameTx(t *testing.T) {
 	const n = 6
 	lgr := testlog.Logger(t, log.LevelWarn)
 	ch, err := newChannelWithChannelOut(lgr, metrics.NoopMetrics, ChannelConfig{
-		UseBlobs:        false,
+		DaType:          DaTypeCalldata,
 		TargetNumFrames: n,
 		CompressorConfig: compressor.Config{
 			CompressionAlgo: derive.Zlib,
@@ -172,7 +172,7 @@ func TestChannel_NextTxData_multiFrameTx(t *testing.T) {
 	const n = eth.MaxBlobsPerBlobTx
 	lgr := testlog.Logger(t, log.LevelWarn)
 	ch, err := newChannelWithChannelOut(lgr, metrics.NoopMetrics, ChannelConfig{
-		UseBlobs:        true,
+		DaType:          DaTypeBlob,
 		TargetNumFrames: n,
 		CompressorConfig: compressor.Config{
 			CompressionAlgo: derive.Zlib,

op-batcher/batcher/driver.go

@@ -655,14 +655,6 @@ func (l *BatchSubmitter) cancelBlockingTx(queue *txmgr.Queue[txRef], receiptsCh
 
 // publishToAltDAAndL1 posts the txdata to the DA Provider and then sends the commitment to L1.
 func (l *BatchSubmitter) publishToAltDAAndL1(txdata txData, queue *txmgr.Queue[txRef], receiptsCh chan txmgr.TxReceipt[txRef], daGroup *errgroup.Group) {
-	// sanity checks
-	if nf := len(txdata.frames); nf != 1 {
-		l.Log.Crit("Unexpected number of frames in calldata tx", "num_frames", nf)
-	}
-	if txdata.asBlob {
-		l.Log.Crit("Unexpected blob txdata with AltDA enabled")
-	}
-
 	// when posting txdata to an external DA Provider, we use a goroutine to avoid blocking the main loop
 	// since it may take a while for the request to return.
 	goroutineSpawned := daGroup.TryGo(func() error {
@@ -696,29 +688,32 @@ func (l *BatchSubmitter) publishToAltDAAndL1(txdata txData, queue *txmgr.Queue[t
 // The method will block if the queue's MaxPendingTransactions is exceeded.
 func (l *BatchSubmitter) sendTransaction(txdata txData, queue *txmgr.Queue[txRef], receiptsCh chan txmgr.TxReceipt[txRef], daGroup *errgroup.Group) error {
 	var err error
-
-	// if Alt DA is enabled we post the txdata to the DA Provider and replace it with the commitment.
-	if l.Config.UseAltDA {
+	var candidate *txmgr.TxCandidate
+	switch txdata.daType {
+	case DaTypeAltDA:
+		if !l.Config.UseAltDA {
+			l.Log.Crit("Received AltDA type txdata without AltDA being enabled")
+		}
+		// if Alt DA is enabled we post the txdata to the DA Provider and replace it with the commitment.
 		l.publishToAltDAAndL1(txdata, queue, receiptsCh, daGroup)
 		// we return nil to allow publishStateToL1 to keep processing the next txdata
 		return nil
-	}
-
-	var candidate *txmgr.TxCandidate
-	if txdata.asBlob {
+	case DaTypeBlob:
 		if candidate, err = l.blobTxCandidate(txdata); err != nil {
 			// We could potentially fall through and try a calldata tx instead, but this would
 			// likely result in the chain spending more in gas fees than it is tuned for, so best
 			// to just fail. We do not expect this error to trigger unless there is a serious bug
 			// or configuration issue.
 			return fmt.Errorf("could not create blob tx candidate: %w", err)
 		}
-	} else {
+	case DaTypeCalldata:
 		// sanity check
 		if nf := len(txdata.frames); nf != 1 {
 			l.Log.Crit("Unexpected number of frames in calldata tx", "num_frames", nf)
 		}
 		candidate = l.calldataTxCandidate(txdata.CallData())
+	default:
+		l.Log.Crit("Unknown DA type", "da_type", txdata.daType)
 	}
 
 	l.sendTx(txdata, false, candidate, queue, receiptsCh)
@@ -736,7 +731,7 @@ func (l *BatchSubmitter) sendTx(txdata txData, isCancel bool, candidate *txmgr.T
 		candidate.GasLimit = intrinsicGas
 	}
 
-	queue.Send(txRef{id: txdata.ID(), isCancel: isCancel, isBlob: txdata.asBlob}, *candidate, receiptsCh)
+	queue.Send(txRef{id: txdata.ID(), isCancel: isCancel, isBlob: txdata.daType == DaTypeBlob}, *candidate, receiptsCh)
 }
 
 func (l *BatchSubmitter) blobTxCandidate(data txData) (*txmgr.TxCandidate, error) {

op-batcher/batcher/service.go

@@ -206,30 +206,40 @@ func (bs *BatcherService) initChannelConfig(cfg *CLIConfig) error {
 		TargetNumFrames:       cfg.TargetNumFrames,
 		SubSafetyMargin:       cfg.SubSafetyMargin,
 		BatchType:             cfg.BatchType,
+		// DaType: set below
 	}
 
-	switch cfg.DataAvailabilityType {
-	case flags.BlobsType, flags.AutoType:
-		if !cfg.TestUseMaxTxSizeForBlobs {
-			// account for version byte prefix
-			cc.MaxFrameSize = eth.MaxBlobDataSize - 1
+	if bs.UseAltDA {
+		if cfg.DataAvailabilityType == flags.CalldataType {
+			cc.DaType = DaTypeAltDA
+		} else {
+			return fmt.Errorf("altDA is currently only supported with calldata DA Type")
 		}
-		cc.UseBlobs = true
-	case flags.CalldataType: // do nothing
-	default:
-		return fmt.Errorf("unknown data availability type: %v", cfg.DataAvailabilityType)
-	}
+		if cc.MaxFrameSize > altda.MaxInputSize {
+			return fmt.Errorf("max frame size %d exceeds altDA max input size %d", cc.MaxFrameSize, altda.MaxInputSize)
+		}
+	} else {
 
-	if bs.UseAltDA && cc.MaxFrameSize > altda.MaxInputSize {
-		return fmt.Errorf("max frame size %d exceeds altDA max input size %d", cc.MaxFrameSize, altda.MaxInputSize)
+		switch cfg.DataAvailabilityType {
+		case flags.BlobsType, flags.AutoType:
+			if !cfg.TestUseMaxTxSizeForBlobs {
+				// account for version byte prefix
+				cc.MaxFrameSize = eth.MaxBlobDataSize - 1
+			}
+			cc.DaType = DaTypeBlob
+		case flags.CalldataType: // do nothing
+			cc.DaType = DaTypeCalldata
+		default:
+			return fmt.Errorf("unknown data availability type: %v", cfg.DataAvailabilityType)
+		}
 	}
 
 	cc.InitCompressorConfig(cfg.ApproxComprRatio, cfg.Compressor, cfg.CompressionAlgo)
 
-	if cc.UseBlobs && !bs.RollupConfig.IsEcotone(uint64(time.Now().Unix())) {
+	if cc.UseBlobs() && !bs.RollupConfig.IsEcotone(uint64(time.Now().Unix())) {
 		return errors.New("cannot use Blobs before Ecotone")
 	}
-	if !cc.UseBlobs && bs.RollupConfig.IsEcotone(uint64(time.Now().Unix())) {
+	if !cc.UseBlobs() && bs.RollupConfig.IsEcotone(uint64(time.Now().Unix())) {
 		bs.Log.Warn("Ecotone upgrade is active, but batcher is not configured to use Blobs!")
 	}
 
@@ -261,7 +271,7 @@ func (bs *BatcherService) initChannelConfig(cfg *CLIConfig) error {
 		calldataCC := cc
 		calldataCC.TargetNumFrames = 1
 		calldataCC.MaxFrameSize = 120_000
-		calldataCC.UseBlobs = false
+		calldataCC.DaType = DaTypeCalldata
 		calldataCC.ReinitCompressorConfig()
 
 		bs.ChannelConfig = NewDynamicEthChannelConfig(bs.Log, 10*time.Second, bs.TxManager, cc, calldataCC)

op-batcher/batcher/test_batch_submitter.go

@@ -28,7 +28,7 @@ func (l *TestBatchSubmitter) JamTxPool(ctx context.Context) error {
 	var candidate *txmgr.TxCandidate
 	var err error
 	cc := l.state.cfgProvider.ChannelConfig()
-	if cc.UseBlobs {
+	if cc.UseBlobs() {
 		candidate = l.calldataTxCandidate([]byte{})
 	} else if candidate, err = l.blobTxCandidate(emptyTxData); err != nil {
 		return err

op-batcher/batcher/tx_data.go

@@ -8,14 +8,23 @@ import (
 	"github.com/ethereum-optimism/optimism/op-service/eth"
 )
 
+// DaType determines how txData is submitted to L1.
+type DaType int
+
+const (
+	DaTypeCalldata DaType = iota
+	DaTypeBlob
+	DaTypeAltDA
+)
+
 // txData represents the data for a single transaction.
 //
 // Note: The batcher currently sends exactly one frame per transaction. This
 // might change in the future to allow for multiple frames from possibly
 // different channels.
 type txData struct {
 	frames []frameData
-	asBlob bool // indicates whether this should be sent as blob
+	daType DaType
 }
 
 func singleFrameTxData(frame frameData) txData {

op-batcher/flags/flags.go

@@ -82,8 +82,10 @@ var (
 		EnvVars: prefixEnvVars("MAX_BLOCKS_PER_SPAN_BATCH"),
 	}
 	TargetNumFramesFlag = &cli.IntFlag{
-		Name:    "target-num-frames",
-		Usage:   "The target number of frames to create per channel. Controls number of blobs per blob tx, if using Blob DA.",
+		Name: "target-num-frames",
+		Usage: "The target number of frames to create per channel. " +
+			"Controls number of blobs per blob tx, if using Blob DA, " +
+			"or number of frames per blob, if using altDA.",
 		Value:   1,
 		EnvVars: prefixEnvVars("TARGET_NUM_FRAMES"),
 	}