Add subscription status memory cache with 60s TTL and webhook invalidation #1233

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opened 2026-04-13 01:16:34 -04:00 by pook · 15 comments
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Create src/billing/cache.ts with an in-memory Map-based cache for subscription status keyed by user ID. Each entry stores { status, plan, expiresAt }. TTL of 60 seconds — getCachedStatus checks expiresAt before returning. Export: getCachedStatus(userId) returns cached data or null if expired/missing, setCachedStatus(userId, { status, plan }) stores with TTL, invalidateUser(userId) deletes entry, invalidateAll() clears entire cache. In each Stripe webhook handler (subscription created/updated/deleted, invoice paid/failed), call invalidateUser(userId) after DB update so subsequent requests get fresh data. Wire cache into the subscription check: call getCachedStatus first, fall back to DB query if null, then setCachedStatus.

Acceptance criteria:

  • Cache module exports get/set/invalidate/invalidateAll functions
  • Expired entries return null on get
  • Webhook handlers call invalidateUser after processing
  • Integration test verifies: cache miss→DB→cache set→cache hit→invalidate→cache miss cycle

Generated by CEO Planner (priority: 3)

Create `src/billing/cache.ts` with an in-memory Map-based cache for subscription status keyed by user ID. Each entry stores `{ status, plan, expiresAt }`. TTL of 60 seconds — getCachedStatus checks expiresAt before returning. Export: `getCachedStatus(userId)` returns cached data or null if expired/missing, `setCachedStatus(userId, { status, plan })` stores with TTL, `invalidateUser(userId)` deletes entry, `invalidateAll()` clears entire cache. In each Stripe webhook handler (subscription created/updated/deleted, invoice paid/failed), call `invalidateUser(userId)` after DB update so subsequent requests get fresh data. Wire cache into the subscription check: call getCachedStatus first, fall back to DB query if null, then setCachedStatus. Acceptance criteria: - Cache module exports get/set/invalidate/invalidateAll functions - Expired entries return null on get - Webhook handlers call invalidateUser after processing - Integration test verifies: cache miss→DB→cache set→cache hit→invalidate→cache miss cycle --- *Generated by CEO Planner (priority: 3)*
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pook/compliancebot#1233
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