add a nil check

Author: colinlyguo

rollup/internal/controller/relayer/l2_relayer_sanity.go

@@ -17,6 +17,9 @@ import (
 // transaction data (calldata and blobs) by parsing them and comparing against database records.
 // This ensures the constructed transaction data is correct and consistent with the database state.
 func (r *Layer2Relayer) sanityChecksCommitBatchCodecV7CalldataAndBlobs(calldata []byte, blobs []*kzg4844.Blob) error {
+	if r.l1RollupABI == nil {
+		return fmt.Errorf("l1RollupABI is nil: cannot parse commitBatches calldata")
+	}
 	calldataInfo, err := parseCommitBatchesCalldata(r.l1RollupABI, calldata)
 	if err != nil {
 		return fmt.Errorf("failed to parse calldata: %w", err)