diff --git a/op-node/rollup/derive/data_source.go b/op-node/rollup/derive/data_source.go
index 45b4e3a63c9a..2a1dbd7c00de 100644
--- a/op-node/rollup/derive/data_source.go
+++ b/op-node/rollup/derive/data_source.go
@@ -19,8 +19,6 @@ type DataIter interface {
 
 type L1TransactionFetcher interface {
 	InfoAndTxsByHash(ctx context.Context, hash common.Hash) (eth.BlockInfo, types.Transactions, error)
-	FetchReceipts(ctx context.Context, blockHash common.Hash) (eth.BlockInfo, types.Receipts, error)
-	L1BlockRefByNumber(context.Context, uint64) (eth.L1BlockRef, error)
 }
 
 type L1BlobsFetcher interface {
@@ -47,13 +45,13 @@ type PlasmaInputFetcher interface {
 type DataSourceFactory struct {
 	log           log.Logger
 	dsCfg         DataSourceConfig
-	fetcher       L1TransactionFetcher
+	fetcher       L1Fetcher
 	blobsFetcher  L1BlobsFetcher
 	plasmaFetcher PlasmaInputFetcher
 	ecotoneTime   *uint64
 }
 
-func NewDataSourceFactory(log log.Logger, cfg *rollup.Config, fetcher L1TransactionFetcher, blobsFetcher L1BlobsFetcher, plasmaFetcher PlasmaInputFetcher) *DataSourceFactory {
+func NewDataSourceFactory(log log.Logger, cfg *rollup.Config, fetcher L1Fetcher, blobsFetcher L1BlobsFetcher, plasmaFetcher PlasmaInputFetcher) *DataSourceFactory {
 	config := DataSourceConfig{
 		l1Signer:          cfg.L1Signer(),
 		batchInboxAddress: cfg.BatchInboxAddress,
diff --git a/op-node/rollup/derive/plasma_data_source.go b/op-node/rollup/derive/plasma_data_source.go
index d5eb552beb49..c1b5121128bf 100644
--- a/op-node/rollup/derive/plasma_data_source.go
+++ b/op-node/rollup/derive/plasma_data_source.go
@@ -16,13 +16,13 @@ type PlasmaDataSource struct {
 	log     log.Logger
 	src     DataIter
 	fetcher PlasmaInputFetcher
-	l1      L1TransactionFetcher
+	l1      L1Fetcher
 	id      eth.BlockID
 	// keep track of a pending commitment so we can keep trying to fetch the input.
 	comm plasma.Keccak256Commitment
 }
 
-func NewPlasmaDataSource(log log.Logger, src DataIter, l1 L1TransactionFetcher, fetcher PlasmaInputFetcher, id eth.BlockID) *PlasmaDataSource {
+func NewPlasmaDataSource(log log.Logger, src DataIter, l1 L1Fetcher, fetcher PlasmaInputFetcher, id eth.BlockID) *PlasmaDataSource {
 	return &PlasmaDataSource{
 		log:     log,
 		src:     src,
diff --git a/op-plasma/dastate.go b/op-plasma/dastate.go
index b36471d4db61..465eefe9ff9f 100644
--- a/op-plasma/dastate.go
+++ b/op-plasma/dastate.go
@@ -176,7 +176,7 @@ func (s *State) Prune(bn uint64) {
 	}
 	// only first element is the highest priority (lowest block number).
 	// next highest priority is swapped to the first position after a Pop.
-	for s.comms[0].blockNumber < bn {
+	for s.comms.Len() > 0 && s.comms[0].blockNumber < bn {
 		c := heap.Pop(&s.comms).(*Commitment)
 		s.log.Debug("prune commitment", "expiresAt", c.expiresAt, "blockNumber", c.blockNumber)
 		delete(s.commsByKey, string(c.key))