pad column_indices

Author: kevaundray

specs/_features/eip7594/p2p-interface.md

@@ -73,11 +73,13 @@ def verify_data_column_sidecar_kzg_proofs(sidecar: DataColumnSidecar) -> bool:
     assert len(sidecar.column) == len(sidecar.kzg_commitments) == len(sidecar.kzg_proofs)
     row_ids = [RowIndex(i) for i in range(len(sidecar.column))]
 
+    column_indices = [sidecar.index] * len(sidecar.column)
+
     # KZG batch verifies that the cells match the corresponding commitments and proofs
     return verify_cell_kzg_proof_batch(
         row_commitments_bytes=sidecar.kzg_commitments,
         row_indices=row_ids,  # all rows
-        column_indices=[sidecar.index],
+        column_indices=column_indices,
         cells=sidecar.column,
         proofs_bytes=sidecar.kzg_proofs,
     )