Stage 6: gateway edge (Connect/FlatBuffers over h2c, platform/email/guest auth, sessions, rate-limit, admin passthrough, live push bridge)
New public ingress and the first network edge. Framework + a vertical slice of
operations end-to-end; remaining ops reuse the same transcode pattern in Stage 7.
Contracts (new module scrabble/pkg):
- push.proto (backend->gateway gRPC server-stream) + scrabble.fbs (FlatBuffers
edge payloads), committed generated Go; buf/flatc Makefiles (dev-time codegen).
Backend:
- REST handlers on the /api/v1 groups: internal session endpoints
(telegram/guest/email login -> mint, resolve, revoke) and the user slice
(profile, submit_play, state, lobby enqueue/poll, chat).
- internal/notify in-process Publisher hub + internal/pushgrpc gRPC server
(BACKEND_GRPC_ADDR) streaming your_turn/opponent_moved/chat/nudge/match_found;
emission in game.commit, social, matchmaker.
- migration 00005 accounts.is_guest; guests are durable rows excluded from stats;
ProvisionGuest; email-as-login (RequestLoginCode/LoginWithCode).
Gateway (new module scrabble/gateway):
- Connect Gateway service over h2c (Execute + Subscribe), FlatBuffers<->JSON
transcode registry, Telegram initData HMAC validator (seam), session cache,
token-bucket rate limiter (3 classes), push fan-out hub, backend REST + push
gRPC client, admin Basic-Auth reverse proxy.
go.work: use ./pkg, ./gateway + replace scrabble/pkg. CI: gateway/**, pkg/**
path filters; unit build/vet/test span all three modules. Docs (PLAN,
ARCHITECTURE, FUNCTIONAL+ru, TESTING, READMEs) updated; gateway/pkg unit tests +
guest/email-login integration tests.
Ilia Denisov
408da3f201