LMS-BGN/docs/stories/3-2-reward-balance-read-api.md

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# Story 3.2: Reward Balance Read API
key: 3-2-reward-balance-read-api
status: drafted
phase: backend-planning
note: Non-implementasi — konvensi fields, caching, dan kontrol akses.
## Ringkasan
Endpoint read-only untuk membaca saldo reward (poin) pengguna.
## Scope Backend
- Read-only saldo poin: { userId, balance }
- Opsional: { pending, lastUpdated }
- Akses: by userId; kontrol akses disepakati
## Acceptance Gate
- Format field disetujui
- Data privacy & rate limiting disepakati
## Kontrak (Outline)
- Route: GET /api/users/{userId}/rewards/balance
- Response: 200
```
{ "userId":"u1", "balance":120, "pending":10, "lastUpdated":"2025-11-12T10:00:00Z" }
```