statediff/indexer/database/file/indexer.go

@@ -462,13 +462,13 @@ func (sdi *StateDiffIndexer) PushIPLD(batch interfaces.Batch, ipld sdtypes.IPLD)
 }
 
 // CurrentBlock returns the HeaderModel of the highest existing block in the output.
-// In the "dump" case, this is always nil.
+// In the "file" case, this is always nil.
 func (sdi *StateDiffIndexer) CurrentBlock() (*models.HeaderModel, error) {
 	return nil, nil
 }
 
 // DetectGaps returns a list of gaps in the output found within the specified block range.
-// In the "dump" case this is always nil.
+// In the "file" case this is always nil.
 func (sdi *StateDiffIndexer) DetectGaps(beginBlockNumber uint64, endBlockNumber uint64) ([]*interfaces.BlockGap, error) {
 	return nil, nil
 }

statediff/service.go

@@ -1211,7 +1211,7 @@ func (sds *Service) backfillHeadGap(indexerBlockNumber uint64, chainBlockNumber
 		}(i)
 	}
 
-	for bn := indexerBlockNumber; bn <= chainBlockNumber; bn++ {
+	for bn := indexerBlockNumber + 1; bn <= chainBlockNumber; bn++ {
 		ch <- bn
 	}
 	close(ch)