fix(binding): accept 4G nanosecond timestamps on Python 3.10

talkingq-url/banban/service/traffic_handoff.py

@@ -80,8 +80,11 @@ async def binding_relation(source_binding_id: str, request_id: str, *, close=Fal
         valid = valid and data.get("status") == "unknown" and not data.get("acceptingHandoff")
     try:
         checked = data.get("checkedAt")
-        valid = valid and isinstance(checked, str) and checked.endswith("Z")
-        datetime.fromisoformat(checked.replace("Z", "+00:00"))
+        valid = valid and isinstance(checked, str) and bool(re.fullmatch(
+            r"[0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}(?:\.[0-9]+)?Z", checked))
+        # Java Instant can return nanoseconds; Python 3.10 fromisoformat rejects
+        # that precision. Validate the calendar separately and preserve the value.
+        datetime.strptime(checked[:19], "%Y-%m-%dT%H:%M:%S")
     except (AttributeError, TypeError, ValueError):
         valid = False
     if not valid:

talkingq-url/tests/test_traffic_relation.py

@@ -43,6 +43,10 @@ async def test_query_and_close_encode_existing_ids_and_use_service_auth(monkeypa
     {"status": "bound"}, {"status": "unknown"}, {"status": {}},
     {"relationState": []}, {"checkedAt": None}, {"checkedAt": "badZ"},
     {"checkedAt": "2026-09-23T08:00:00"}, {"canUnbind": False},
+    {"checkedAt": "2026-02-30T08:00:00.123456789Z"},
+    {"checkedAt": "2026-09-23T08:00:00.Z"},
+    {"checkedAt": "2026-09-23T08:00:00.123456789+00:00"},
+    {"checkedAt": "2026-09-23T08:00:00.123456789Zjunk"},
 ])
 async def test_inconsistent_or_malformed_relation_never_authorizes_unbind(monkeypatch, changes):
     transport(monkeypatch, lambda request: httpx.Response(200, json={"code": "OK", "data": {**RELEASED, **changes}}))
@@ -71,6 +75,18 @@ async def test_valid_non_success_business_states_are_preserved(monkeypatch, stat
     assert await adapter.binding_relation(SOURCE, "query") == state
 
 
+@pytest.mark.asyncio
+@pytest.mark.parametrize("checked", [
+    "2026-09-23T09:52:51Z", "2026-09-23T09:52:51.2Z",
+    "2026-09-23T09:52:51.262Z", "2026-09-23T09:52:51.262251Z",
+    "2026-09-23T09:52:51.262251915Z",
+])
+async def test_java_instant_precision_is_accepted_and_preserved(monkeypatch, checked):
+    state = {**RELEASED, "checkedAt": checked}
+    transport(monkeypatch, lambda request: httpx.Response(200, json={"code": "OK", "data": state}))
+    assert await adapter.binding_relation(SOURCE, "query") == state
+
+
 @pytest.mark.asyncio
 async def test_relation_network_timeout_is_explicit(monkeypatch):
     def timeout(request): raise httpx.ReadTimeout("test timeout")