tiennm99
c3f7c02f6d
feat(canvas): migrate canvas + cooldown storage to DO SQLite
...
Move pixel state and rate-limit cooldowns out of Upstash Redis and into
the existing CanvasRoom Durable Object's SQLite-backed storage. Worker
becomes a thin validation/proxy; the DO does atomic cooldown check +
pixel write + WS broadcast in one in-memory step.
Why: eliminate external dependency, keep $0/month free-tier forever,
exploit single-threaded actor for strong consistency without round-trips.
Architecture:
- canvas_chunks: 256 BLOB rows × 64 KB; CHUNK_COUNT derived from
CANVAS_WIDTH × CANVAS_HEIGHT / CHUNK_BYTES so resize is config-only.
- cooldowns: user_id → expires_at, 1% sample-rate lazy GC.
- Worker forwards /api/canvas, /api/place, /api/ws to DO endpoints.
- POST /admin/migrate-from-upstash: token-gated one-shot importer.
Phases 1-3 code complete; Upstash dependency stays until prod migration
runs and 7-day rollback window passes (Phase 4).
Plan: plans/260509-2309-canvas-on-do-storage/
2026-05-09 23:53:21 +07:00
tiennm99