Phase 4 Release Checklist

Environment

• [ ] ZALOPAY_APP_ID, ZALOPAY_KEY1, ZALOPAY_KEY2 set for target env.
• [ ] ZALOPAY_CALLBACK_URL and frontend return URL point to correct domain.
• [ ] ZNS_ACCESS_TOKEN, ZNS_TEMPLATE_ID, ZNS_ENDPOINT validated.
• [ ] Kafka, Redis, Mongo, Postgres connectivity validated in health checks.

Functional Gates

• [ ] Booking -> Payment intent -> Callback -> History flow passes on staging.
• [ ] Duplicate webhook payload does not create duplicate state transitions.
• [ ] Reconciliation job flags stale pending payments as manual-review records.
• [ ] BOOKING_CONFIRMED event triggers ZNS log entry and successful delivery.

Observability

• [ ] Alerts enabled for payment failure spike, webhook error spike, ZNS failure spike.
• [ ] Dashboard panels for payment success rate and callback latency reviewed.
• [ ] Runbook shared with on-call rotation.

UAT Evidence

• [ ] Happy-path evidence with real data (screenshots/log snippets).
• [ ] Error-path evidence (cancel, timeout, failed callback).
• [ ] Final regression checklist signed by FE/BE/QA.