fix(taiko-client): blob fetching using wrong timestamp

packages/taiko-client/driver/chain_syncer/blob/syncer.go

@@ -290,7 +290,12 @@ func (s *Syncer) onBlockProposed(
 			txListFetcher = new(txlistFetcher.CalldataFetcher)
 		}
 
-		txListBytes, err = txListFetcher.Fetch(ctx, tx, &event.Meta)
+		header, err := s.rpc.L1.HeaderByNumber(ctx, new(big.Int).SetUint64(event.Raw.BlockNumber))
+		if err != nil {
+			return fmt.Errorf("failed to get header by number: %w", err)
+		}
+
+		txListBytes, err = txListFetcher.Fetch(ctx, tx, &event.Meta, event.Raw.BlockNumber, header.Time)
 		if err != nil {
 			return fmt.Errorf("failed to fetch tx list: %w", err)
 		}

packages/taiko-client/driver/txlist_fetcher/blob.go

@@ -31,18 +31,20 @@ func (d *BlobFetcher) Fetch(
 	ctx context.Context,
 	_ *types.Transaction,
 	meta *bindings.TaikoDataBlockMetadata,
+	emittedInBlockID uint64,
+	blockProposedEventEmittedInTimestamp uint64,
 ) ([]byte, error) {
 	if !meta.BlobUsed {
 		return nil, pkg.ErrBlobUsed
 	}
 
 	// Fetch the L1 block sidecars.
-	sidecars, err := d.ds.GetBlobs(ctx, meta)
+	sidecars, err := d.ds.GetBlobs(ctx, meta, blockProposedEventEmittedInTimestamp)
 	if err != nil {
 		return nil, err
 	}
 
-	log.Info("Fetch sidecars", "blockNumber", meta.L1Height+1, "sidecars", len(sidecars))
+	log.Info("Fetch sidecars", "blockNumber", emittedInBlockID, "sidecars", len(sidecars))
 
 	// Compare the blob hash with the sidecar's kzg commitment.
 	for i, sidecar := range sidecars {

packages/taiko-client/driver/txlist_fetcher/calldata.go

@@ -15,9 +15,11 @@ type CalldataFetcher struct{}
 
 // NewCalldataTxListFetcher creates a new CalldataFetcher instance.
 func (d *CalldataFetcher) Fetch(
-	_ context.Context,
+	ctx context.Context,
 	tx *types.Transaction,
 	meta *bindings.TaikoDataBlockMetadata,
+	emittedInBlockID uint64,
+	blockProposedEventEmittedInTimestamp uint64,
 ) ([]byte, error) {
 	if meta.BlobUsed {
 		return nil, pkg.ErrBlobUsed

packages/taiko-client/driver/txlist_fetcher/interface.go

@@ -10,5 +10,11 @@ import (
 
 // TxListFetcher is responsible for fetching the L2 txList bytes from L1
 type TxListFetcher interface {
-	Fetch(ctx context.Context, tx *types.Transaction, meta *bindings.TaikoDataBlockMetadata) ([]byte, error)
+	Fetch(
+		ctx context.Context,
+		_ *types.Transaction,
+		meta *bindings.TaikoDataBlockMetadata,
+		emittedInBlockID uint64,
+		blockProposedEventEmittedInTimestamp uint64,
+	) ([]byte, error)
 }

packages/taiko-client/pkg/rpc/blob_datasource.go

@@ -76,6 +76,7 @@ func (p *BlobServerResponse) UnmarshalJSON(data []byte) error {
 func (ds *BlobDataSource) GetBlobs(
 	ctx context.Context,
 	meta *bindings.TaikoDataBlockMetadata,
+	emittedInTimestamp uint64,
 ) ([]*blob.Sidecar, error) {
 	if !meta.BlobUsed {
 		return nil, pkg.ErrBlobUnused
@@ -88,7 +89,7 @@ func (ds *BlobDataSource) GetBlobs(
 	if ds.client.L1Beacon == nil {
 		sidecars, err = nil, pkg.ErrBeaconNotFound
 	} else {
-		sidecars, err = ds.client.L1Beacon.GetBlobs(ctx, meta.Timestamp)
+		sidecars, err = ds.client.L1Beacon.GetBlobs(ctx, emittedInTimestamp)
 	}
 	if err != nil {
 		log.Info("Failed to get blobs from beacon, try to use blob server.", "error", err.Error())

packages/taiko-client/pkg/rpc/blob_datasource_test.go

@@ -27,6 +27,7 @@ func TestGetBlobsFromBlobScan(t *testing.T) {
 			BlobHash: common.HexToHash("0x0145185449c57dee4e6c921b702e5d572fbeb026f96c220a6a17b79d157d921b"),
 			BlobUsed: true,
 		},
+		0,
 	)
 	require.Nil(t, err)
 	require.NotNil(t, sidecars)