fixed a comment message
@@ -71,7 +71,7 @@ class f: # provides a namespace for reusable field constants
DOMAIN_CATCHUP_REP = Field("domainCatchupRep", Any)
-# TODO: Move this to `txn.py` which should be renamed to error_codes.py
+# TODO: Move this to `txn.py` which should be renamed to constants.py
OP_FIELD_NAME = "op"
