RetiredSets

The hard part is matching real-time pricing to real inventory without hitting BrickLink's rate limits. We built a two-tier cache, a hot in-memory cache for the most-requested items refreshed every few minutes, and a warm Postgres-persisted cache for the long tail refreshed lazily, giving sub-100ms quotes for common items and graceful degradation for obscure sets. Wise payouts run on a webhook architecture: state changes call our signed webhook and move the submission to its next state automatically. Bank details are encrypted with AES-256-GCM behind a Prisma extension, so application code reads and writes plaintext while storage stays encrypted, even in backups.

Authentication runs on NextAuth with credentials plus email, and admin access is gated by a role check at the middleware layer rather than per-route, so privileged surfaces fail closed by default.