Migrate all callables off functions.https.onCall to firebase-functions/v2/https onCall:
createInvite, acceptInvite, leaveCouple, submitOutcome, sendGentleReminder,
sendThinkingOfYou, checkDeviceIntegrity, syncEntitlement, assignDailyQuestionCallable,
wrapReleaseKey. context.auth/app → request.auth/app, data arg → request.data. The 8
client-hardcoded callable names are preserved verbatim (verified via emulator discovery).
The manual `if (!request.app)` App Check check is a 1:1 port (no enforceAppCheck switch).
Hardening folded in:
- acceptInviteCallable: await the previously fire-and-forget partner_joined push (gen 2
freezes the instance after the response) — still swallows push errors so a failed push
never fails the accept.
- checkDeviceIntegrity: 10s timeout on the Play Integrity client.request so a hung upstream
can't pin the instance (fail-closed catch already handles the throw); memory 512MiB.
- wrapReleaseKey: memory 512MiB (tink); HttpsError swapped to v2; lazy tink require + graceful
failure preserved.
- Error mapping with `if (e instanceof HttpsError) throw e` re-throw guard around the risky
DB sections in acceptInvite, leaveCouple, submitOutcome, sendGentleReminder,
sendThinkingOfYou — raw errors map to a clean 'internal' without masking intentional codes
(resource-exhausted rate limits, permission-denied, etc.). leaveCouple's best-effort
recursiveDelete sweep now swallows errors (the transactional leave already succeeded).
- Adopt shared sendPushToUser()/logger; remove copied token readers + plaintext token logging.
Delete dead placeholder callables notifications/reminders.ts (sendDailyQuestionReminder,
sendPartnerAnsweredNotification) — no client caller; wrote sent:false rows nothing consumed.
Build clean; 70 tests green; discovery loads all callables as v2 in us-central1. dist rebuilt.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Change the 5 https.onCall handlers from `data: any` to
`data: Record<string, unknown>`, so payload fields are `unknown` and must go
through the existing validators rather than being implicitly-typed. No behavior
change (every field was already validated); tsc + 53 function tests green.
Left as-is deliberately: `catch (err: unknown)` narrowing (churn, marginal) and
the untyped Tink handles in wrapReleaseKeyCallable (the crypto lib ships no types).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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