Implement Outbox Pattern with consumer ACK to ensure 100% reliable event
delivery between blockchain-service and wallet-service:
blockchain-service:
- Add OutboxEvent model to Prisma schema with status tracking
- Create outbox repository interface and implementation
- Modify deposit-detection.service to write events to outbox
- Add outbox-publisher.service with cron jobs for publishing/retry
- Add deposit-ack-consumer.service to receive ACK from wallet-service
- Add publishRaw method to event-publisher.service
wallet-service:
- Modify deposit-confirmed.handler to send ACK after successful processing
- Add wallet.deposit.credited topic mapping for ACK events
Event flow:
1. Deposit detected → written to outbox (status: PENDING)
2. Outbox publisher sends to Kafka → status: SENT
3. wallet-service processes and sends ACK → status: ACKED
4. Events without ACK are retried with exponential backoff
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
