[lib-audit] APNs mints a JWT per push, retries dead tokens forever (tsk-42q2qf) - #2801
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…-42q2qf) Two independent defects in the Apple push sender. The sender minted a fresh ES256 provider token on every single push. Apple caps provider-token *generation*, not use: a notification burst earns 403 TooManyProviderTokenUpdates and pushes are then refused account-wide, not per-device. One token is now cached on the sender and reminted after 50 minutes -- inside the one-hour validity window and far under the generation cap. A clock that moves backwards counts as stale so a bad NTP step cannot pin a token past its real expiry, and Apple's own ExpiredProviderToken invalidates the cache at once rather than leaving every push refused until the timer fires. `send()` also collapsed every non-200 into a bare False, so 410 Unregistered -- Apple's permanent "this device token is dead" signal -- was indistinguishable from a retryable failure and the dead token was pushed to forever. 410 now raises ApnsUnregistered carrying the reason and apns-id; the device fan-out catches it and clears that token from the device row, scoped to the exact token that failed so a device that re-registered mid-fan-out keeps its new one. The device row itself is kept: the device is still paired and still visible to its owner. This mirrors the 404/410 prune the web-push path already performs. send_device_push therefore reports a "removed" count alongside sent/failed/ skipped, the same shape send_web_push returns. Every refusal now logs Apple's `reason` and the `apns-id`; neither was surfaced before, so a refused push could not be diagnosed at all. The ES256 signing itself is untouched.
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📝 WalkthroughWalkthroughThe push system now reuses APNs provider tokens, logs refusal metadata, remints invalid tokens, enriches decision payloads, and clears permanently unregistered device tokens. Push results now include a ChangesAPNs push handling
Estimated code review effort: 3 (Moderate) | ~25 minutes Merge Risk: 🟡 Moderate · up to During a sustained backward system-clock adjustment, APNs provider tokens may age past APNs' validity limit before local refresh, causing push deliveries to be refused. The token-refresh time source should be corrected and covered through a second refresh under persistent clock regression before merge. Sequence Diagram(s)sequenceDiagram
participant send_device_push
participant HttpApnsSender
participant APNs
participant DeviceStore
send_device_push->>HttpApnsSender: Send device push with payload metadata
HttpApnsSender->>APNs: Send request with cached provider JWT
APNs-->>HttpApnsSender: Return 410 Unregistered with reason and apns-id
HttpApnsSender-->>send_device_push: Raise ApnsUnregistered
send_device_push->>DeviceStore: Clear matching device_id and push_token
DeviceStore-->>send_device_push: Confirm token removal
send_device_push-->>send_device_push: Increment removed count
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 17.65% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 51 functions across 7 files. (1 skipped: 1 unsupported.)
✨ Finishing Touches 💡 1📝 Generate docstrings 💡
🧪 Generate unit tests (beta)
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Code Review SummaryStatus: 4 Issues Found | Recommendation: Address before merge Overview
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Inline comments:
In `@tinyagentos/push/apns.py`:
- Line 142: Update _provider_token() to calculate cache age with a monotonic
clock while preserving wall-clock time for JWT timestamps, and ensure
build_apns_jwt() receives an iat that never regresses. Add a regression test
covering a backward wall-clock adjustment and confirming token refresh behavior.
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changelog.d/tsk-42q2qf-apns-token-reuse-and-410.mddocs/design/whisplay-pocket-interface-spike.mdtests/push/test_apns.pytests/push/test_unifiedpush.pytests/test_notifications_push.pytinyagentos/device_store.pytinyagentos/notifications_push.pytinyagentos/push/__init__.pytinyagentos/push/apns.py
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…-42q2qf) Two independent defects in the Apple push sender. The sender minted a fresh ES256 provider token on every single push. Apple caps provider-token *generation*, not use: a notification burst earns 403 TooManyProviderTokenUpdates and pushes are then refused account-wide, not per-device. One token is now cached on the sender and reminted after 50 minutes -- inside the one-hour validity window and far under the generation cap. A clock that moves backwards counts as stale so a bad NTP step cannot pin a token past its real expiry, and Apple's own ExpiredProviderToken invalidates the cache at once rather than leaving every push refused until the timer fires. `send()` also collapsed every non-200 into a bare False, so 410 Unregistered -- Apple's permanent "this device token is dead" signal -- was indistinguishable from a retryable failure and the dead token was pushed to forever. 410 now raises ApnsUnregistered carrying the reason and apns-id; the device fan-out catches it and clears that token from the device row, scoped to the exact token that failed so a device that re-registered mid-fan-out keeps its new one. The device row itself is kept: the device is still paired and still visible to its owner. This mirrors the 404/410 prune the web-push path already performs. send_device_push therefore reports a "removed" count alongside sent/failed/ skipped, the same shape send_web_push returns. Every refusal now logs Apple's `reason` and the `apns-id`; neither was surfaced before, so a refused push could not be diagnosed at all. The ES256 signing itself is untouched. Docs-Reviewed: merge only
…against clock regression Two review findings on the token cache from the earlier merge: InvalidProviderToken (403) is just as permanent as ExpiredProviderToken -- a rotated signing key, or a cached token that is otherwise unparseable -- so it now also forces an immediate remint instead of refusing every push for the rest of the 50-minute cache window. A wall clock that steps backward (a bad NTP correction) previously let the new token's iat regress behind the last one this process actually used. Apple checks iat against its own correct clock, so a regressed iat combined with a full fresh cache window could let the cache keep reusing a token past Apple's real one-hour limit before the local refresh timer ever fired. iat is now floored at the previous iat so it freezes through a bad clock stretch rather than moving backward. Also drops a redundant dict(empty) copy in send_device_push's early-return paths (kilo-code-bot nit) and fixes a missing separator comment left by the origin/dev merge in tests/push/test_apns.py. Docs-Reviewed: fold pass, no installer/route change
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Fold pass 2026-09-06 Merged origin/dev into this branch (189 commits behind). Conflicts were confined to two test files -- both sides had appended non-overlapping test blocks (tsk-42q2qf's provider-token/410 tests vs dev's tsk-cf7wzc image/actions tests); resolved by keeping both blocks in full. The touched source files (tinyagentos/push/apns.py, tinyagentos/notifications_push.py, tinyagentos/push/unifiedpush.py) auto-merged cleanly with both intents intact. Ran tests/push/test_apns.py + tests/test_notifications_push.py + tests/push/test_unifiedpush.py: 94 passed before further changes. Findings:
Test command: New head: f6e88fc |
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Inline comments:
In `@tinyagentos/push/apns.py`:
- Line 199: Update the JWT refresh logic around new_iat so token age uses a
monotonic elapsed-time source rather than relying only on wall-clock time.
Derive each replacement iat from the prior logical issue time plus elapsed
monotonic time, preserving nondecreasing timestamps while keeping cached tokens
within APNs’ one-hour validity window; extend the regression test through a
second refresh with the wall clock still regressed.
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changelog.d/tsk-42q2qf-apns-token-reuse-and-410.mdtests/push/test_apns.pytests/push/test_unifiedpush.pytests/test_notifications_push.pytinyagentos/notifications_push.pytinyagentos/push/apns.py
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CARD TITLE (intent, not commit subject): [lib-audit] APNs mints a JWT per push, retries dead tokens forever
Autonomous build of board card tsk-42q2qf.
Option B from the card (no new dependency). The two must-fix behaviours are the
ones the card says should land regardless of which option is chosen;
aioapnswas not pulled in, so the
ApnsSenderProtocol and the ES256 signing (which thecard marks correct — untouched) stay as they are.
What changed
Defect 1 — a fresh provider token per push.
HttpApnsSender.send()minted anew ES256 JWT on every call. Apple caps provider-token generation, not use: a
notification burst earns
403 TooManyProviderTokenUpdatesand pushes are thenrefused account-wide, not per-device. The sender now caches one token and
remints it after 50 minutes (
_TOKEN_REFRESH_SECONDS) — inside the one-hourvalidity window and far under the generation cap.
Two hazards that caching itself introduces are handled:
token past its real expiry;
403 ExpiredProviderTokendrops the cached token immediately, so early expiryunder clock skew does not refuse every push until the 50-minute timer fires.
The mint happens with no
awaitbetween the staleness check and the store, soconcurrent senders in one event loop cannot interleave into a double mint (the
fan-out is an
asyncio.gather, so this matters).Defect 2 — 410 Unregistered collapsed into a generic failure.
return resp.status_code == 200made Apple's permanent "this device token is dead"signal indistinguishable from a retryable failure, so the dead token was pushed
to forever, and neither
apns-idnorreasonwas ever surfaced.ApnsUnregisteredcarryingpush_token,apns_idandreason. This mirrors the shape the web-push path in the same module alreadyuses (
WebPushException→ status 404/410 → prune), so the two paths read thesame way and
send()keeps its-> boolcontract for ordinary refusals._send_one_device()catches it and clears that token via the newDeviceStore.clear_push_token(device_id, push_token). The UPDATE is scoped tothe exact token that failed, so a device that re-registered between the
fan-out and the 410 response keeps its new token. The device row itself is
kept — the device is still paired and still visible to its owner, it simply
has no deliverable push token until it registers another.
send_device_push()now reports a"removed"count alongsidesent/failed/skipped, the same shapesend_web_push()already returns.Two tests asserting the exact old dict were updated for the new key.
status, Apple'sreasonand theapns-idbefore thestatus becomes a return value, so a refused push is diagnosable at all.
Files:
tinyagentos/push/apns.py,tinyagentos/notifications_push.py,tinyagentos/device_store.py,tinyagentos/push/__init__.py.RED FIRST (pasted)
At the base ref (
origin/dev), before the fix:The two store tests use the real
DeviceStore(not a fake), so the scopedUPDATE is exercised rather than mocked.
GREEN
Also run (regression sweep over everything that touches the device store, the
device routes and the decision push path):
Docs
changelog.d/tsk-42q2qf-apns-token-reuse-and-410.md— new fragment(
### Fixed), three bullets covering token reuse, the 410 prune, and thelogged
reason.docs/design/whisplay-pocket-interface-spike.md— itssend_device_pushline-range citation was shifted by this change; updated to
:417-466. Thebehaviour that doc describes (platform branching for ios/watchos/android, and
a Pi having no push endpoint) is unchanged.
docs/design/store-classification-reference.md— checked, no update needed:no schema or store-classification change (
clear_push_tokenwrites anexisting column).
Summary by CodeRabbit
Bug Fixes
Improvements