import json
event = {"time": "2026-06-12T09:10:00Z", "actor": "borrower-18", "action": "loan.return", "resource": "loan-42", "outcome": "denied", "request_id": "demo-07"}
encoded = json.dumps(event, sort_keys=True)
assert json.loads(encoded)["outcome"] == "denied"
assert not ({"password", "session", "token"} & event.keys())
print("structured denial event recorded without credential fields")