feat(telegram): split connector into home validator + remote bot
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Move all Telegram egress off the main host. The single connector held the
bot token, long-polled Telegram and answered the gateway/backend over the
trusted internal network, so the whole component (including login validation)
shared fate with its VPN sidecar. Split it into two binaries that share the
token:

- cmd/validator (home, no VPN): Mini App initData + Login Widget HMAC only,
  never calls the Bot API. The gateway dials it for Telegram auth, so game
  login is now independent of Telegram reachability.
- cmd/bot (remote): Bot API long-poll + sendMessage, the only component
  reaching Telegram. It holds no inbound port — it dials the gateway over a
  new reverse mTLS bot-link (pkg/proto/botlink/v1) and executes the send
  commands the gateway pushes.

The gateway funnels sends to the bot-link: out-of-app push is fire-and-forget
(at-most-once, dropped if no bot is connected); the backend admin broadcasts
reach a gateway-served relay that forwards them and awaits the bot's ack
(SendToUser/SendToGameChannel contract preserved). mTLS (pkg/mtls) is the one
inter-service link that leaves the trusted segment; validator<->gateway and
the relay stay plaintext internal. The bot is Telegram-rate-limited.

One bot now; the gateway bot registry, an owns_updates flag and per-command
ids leave seams for N later. Webhook rejected (one URL per token, adds inbound
+ a static address).

The unified test contour runs the split (the bot keeps its VPN sidecar and
dials the gateway by its internal name; bot-link certs from deploy/gen-certs.sh,
generated in CI). The prod wiring — the bot on a separate host (no VPN), the
gateway bot-link port published, PROD_ certs with scheduled rotation, an SSH
deploy of both hosts together — is the deferred final stage (PRERELEASE.md TX,
Stage 18).

Docs: ARCHITECTURE, PRERELEASE (phase TX), platform/telegram + gateway +
backend + deploy READMEs, FUNCTIONAL(+ru), CLAUDE.md, .env.example.
This commit is contained in:
Ilia Denisov
2026-06-21 00:19:07 +02:00
parent 2a8717c930
commit 6aeb529f13
42 changed files with 3073 additions and 714 deletions
+18 -8
View File
@@ -1,11 +1,14 @@
# Telegram connector image.
# Telegram platform images: the home validator (HMAC of Mini App / Login Widget
# data, no Bot API, no VPN) and the remote bot (Bot API long-poll + sendMessage,
# dialing the gateway over the reverse mTLS bot-link). One build stage compiles both
# binaries; the `validator` and `bot` targets each ship one on distroless nonroot.
#
# The connector imports only the shared scrabble/pkg module, so the build drops the
# The platform imports only the shared scrabble/pkg module, so the build drops the
# other workspace modules (backend, gateway, loadtest), the loadtest-only
# scrabble/gateway replace and the scrabble-solver replace from a copy of go.work: it
# needs neither their sources nor the solver sibling checkout.
# Build from the repository ROOT so go.work, pkg/ and platform/telegram/ are all in
# the context (see deploy/docker-compose.yml, which sets context: ../../..).
# the context (see deploy/docker-compose.yml, which sets context: ..).
FROM golang:1.26.3-alpine AS build
WORKDIR /src
@@ -13,11 +16,18 @@ COPY go.work go.work.sum ./
COPY pkg ./pkg
COPY platform/telegram ./platform/telegram
# Reduce the workspace to what the connector needs: only pkg + platform/telegram.
# Reduce the workspace to what the platform needs: only pkg + platform/telegram.
RUN go work edit -dropuse=./backend -dropuse=./gateway -dropuse=./loadtest -dropreplace=scrabble/gateway@v0.0.0 -dropreplace=scrabble-solver
RUN CGO_ENABLED=0 GOOS=linux go build -trimpath -o /out/telegram ./platform/telegram/cmd/telegram
RUN CGO_ENABLED=0 GOOS=linux go build -trimpath -o /out/validator ./platform/telegram/cmd/validator
RUN CGO_ENABLED=0 GOOS=linux go build -trimpath -o /out/bot ./platform/telegram/cmd/bot
FROM gcr.io/distroless/static-debian12:nonroot
COPY --from=build /out/telegram /usr/local/bin/telegram
ENTRYPOINT ["/usr/local/bin/telegram"]
# --- validator (home) --------------------------------------------------------
FROM gcr.io/distroless/static-debian12:nonroot AS validator
COPY --from=build /out/validator /usr/local/bin/validator
ENTRYPOINT ["/usr/local/bin/validator"]
# --- bot (remote) ------------------------------------------------------------
FROM gcr.io/distroless/static-debian12:nonroot AS bot
COPY --from=build /out/bot /usr/local/bin/bot
ENTRYPOINT ["/usr/local/bin/bot"]
+91 -65
View File
@@ -1,59 +1,68 @@
# scrabble/platform/telegram — Telegram connector
# scrabble/platform/telegram — Telegram validator + bot
The Telegram platform side-service. It is the **only** component that holds the bot
token: it runs a Bot API long-poll loop (Mini App launch + deep-links) and serves
the connector gRPC API that the gateway and backend call over the trusted internal
network. See [`docs/ARCHITECTURE.md`](../../docs/ARCHITECTURE.md) §1/§3/§10/§12.
The Telegram platform side-service, split into **two binaries** that share the bot
token, so Telegram egress lives off the main host while game login does not depend on
it. See [`docs/ARCHITECTURE.md`](../../docs/ARCHITECTURE.md) §1/§3/§10/§12/§13.
## Single bot
- **`cmd/validator`** (home) — verifies Mini App `initData` and Login Widget data by
HMAC (the bot token is the secret) and **never calls the Bot API**. It serves the
validation gRPC API the gateway calls during Telegram auth, on the trusted internal
network with no VPN. Because it needs no Telegram reachability, **game login stays up
even when the bot or the bot-link is down**.
- **`cmd/bot`** (remote) — runs the Bot API long-poll (Mini App launch + `/start`
deep-links) and `sendMessage`, the only component reaching the Telegram Bot API. It
holds **no inbound port**: it dials the gateway over a reverse **mTLS bot-link** and
executes the send commands the gateway pushes, so its egress can run on a host with
native Telegram access (a VPN sidecar in the test contour, a separate host in prod).
The connector hosts **one unified bot** — one token plus one optional game channel,
configured by `TELEGRAM_BOT_TOKEN` and `TELEGRAM_GAME_CHANNEL_ID`. `ValidateInitData`
validates `initData` against that single token (it does not validate ⇒ invalid) and
returns only the Telegram user identity — there is no per-bot service language and no
supported-languages set. Every message the bot sends is rendered in the **recipient's
interface language**: the user-facing `Notify` renders in the request's `language` (the
recipient's interface language); the admin `SendToUser` / `SendToGameChannel` render in
an **operator-chosen** `language`. No call routes between bots — there is only one.
Both hold the same token. One bot owns the exclusive `getUpdates` long-poll
(`TELEGRAM_OWNS_UPDATES`, exactly one per token, else Telegram returns 409); the
design leaves seams (a gateway bot registry, the `owns_updates` flag, per-command ids)
for running several bots later, not built yet.
## Responsibilities
## Validator
- **Mini App auth.** `ValidateInitData` verifies Telegram Web App `initData` (HMAC
under the bot token) and returns the user identity. The gateway calls it during
the `auth.telegram` edge operation, then provisions the session through the
backend internal API — so the bot token never leaves this process.
- **Out-of-app push.** `Notify` renders a backend push event (your_turn, nudge,
match_found, and the invitation / friend_request notify sub-kinds) into a
localized message with a Mini App launch button and sends it through the **single
bot**, rendered in the request's `language` (the recipient's interface language).
The gateway calls it **only** for a recipient with no live in-app stream and the
`notifications_in_app_only` flag off, so the platform push never duplicates in-app
delivery.
`ValidateInitData` validates `initData` against the token and returns only the
Telegram user identity (no per-bot service language, no supported-languages set);
`ValidateLoginWidget` verifies Telegram **Login Widget** web sign-in data — HMAC under
`SHA-256(bot_token)`, distinct from initData (`internal/loginwidget`) — for attaching a
Telegram identity to an account from a browser. Both map a rejection to gRPC
`InvalidArgument`.
## Bot
- **Send commands.** The gateway pushes `Notify` (out-of-app push: your_turn,
game_over, nudge, match_found, and the invitation / friend_request notify sub-kinds),
`SendToUser` and `SendToGameChannel` (operator broadcasts) down the bot-link. The bot
renders the message in the command's `language` (the recipient's interface language;
operator-chosen for broadcasts) with a Mini App launch button and sends it. It replies
with an `Ack` per command (`delivered` mirrors the former connector semantics —
false when the kind is not rendered out-of-app or the user never started the bot).
- **Bot chat.** `/start <payload>` (and the chat menu button) reply with a Mini App
launch button; a deep-link payload routes the launch to a game / invitation /
friend code.
- **Admin messaging.** `SendToUser` and `SendToGameChannel` send
arbitrary text to one user or a game channel through the single bot, rendered in the
`language` the operator chooses in the admin console.
launch button; a deep-link payload routes the launch to a game / invitation / friend
code. This is **self-contained** — the bot never calls back into the game, so `/start`
onboarding works even when the game is down.
- **Rate limiting.** Outbound sends are throttled (`TELEGRAM_SEND_RATE_PER_SECOND`,
default 25) to respect the Bot API flood limits.
The generic methods (`Notify`, `SendToUser`, `SendToGameChannel`) address a
recipient by the identity `external_id` (as in the backend `identities` table), so a
future VK / MAX connector can implement the same service; only `ValidateInitData` is
Telegram-specific.
The send commands address a recipient by the identity `external_id` (as in the backend
`identities` table), so a future VK / MAX bot reuses them; only the validator's initData
parsing is Telegram-specific.
## gRPC API
## gRPC contracts
`pkg/proto/telegram/v1`, service `Telegram`: `ValidateInitData`,
`ValidateLoginWidget`, `Notify`, `SendToUser`, `SendToGameChannel`. Generated Go is
committed under `pkg`. `ValidateLoginWidget` verifies Telegram **Login
Widget** web sign-in data — HMAC under `SHA-256(bot_token)`, distinct from initData
(`internal/loginwidget`) — for attaching a Telegram identity to an account from a
browser.
- `pkg/proto/telegram/v1`, service `Telegram` — served by the **validator**
(`ValidateInitData`, `ValidateLoginWidget`). Its `Notify` / `SendToUser` /
`SendToGameChannel` request shapes are reused as bot-link command payloads; the
gateway also implements `SendToUser` / `SendToGameChannel` as the backend's admin
relay.
- `pkg/proto/botlink/v1`, service `BotLink` — the reverse bidi stream the **bot** dials
on the gateway (`Hello` / `Command` / `Ack`). Generated Go is committed under `pkg`.
## Deep-link scheme
Shared verbatim with the UI (`ui/src/lib/deeplink.ts`). A Mini App start parameter
is a one-character kind prefix plus a value:
Shared verbatim with the UI (`ui/src/lib/deeplink.ts`). A Mini App start parameter is a
one-character kind prefix plus a value:
| Parameter | Destination |
| --- | --- |
@@ -67,40 +76,57 @@ The bot turns a `/start <payload>` or a notification target into a launch-button
## Configuration
Shared:
| Env var | Default | Meaning |
| --- | --- | --- |
| `TELEGRAM_BOT_TOKEN` | — (required) | The bot's API token + initData HMAC secret |
| `TELEGRAM_GAME_CHANNEL_ID` | — | The bot's game channel chat id for `SendToGameChannel` |
| `TELEGRAM_MINIAPP_URL` | — (required) | Mini App HTTPS origin (BotFather-registered) |
| `TELEGRAM_GRPC_ADDR` | `:9091` | connector gRPC listen address |
| `TELEGRAM_API_BASE_URL` | `https://api.telegram.org` | Bot API host override (mock / self-hosted) |
| `TELEGRAM_TEST_ENV` | `false` | route to the Bot API **test environment** (`/bot<token>/test/METHOD`) |
| `TELEGRAM_BOT_TOKEN` | — (required) | the bot's API token + initData HMAC secret |
| `TELEGRAM_LOG_LEVEL` | `info` | zap log level |
| `TELEGRAM_SERVICE_NAME` | `scrabble-telegram` | OpenTelemetry `service.name` |
| `TELEGRAM_SERVICE_NAME` | per binary | OpenTelemetry `service.name` (validator: `scrabble-telegram-validator`, bot: `scrabble-telegram-bot`) |
| `TELEGRAM_OTEL_TRACES_EXPORTER` | `none` | `none`, `stdout` or `otlp` (gRPC; endpoint from `OTEL_EXPORTER_OTLP_*`) |
| `TELEGRAM_OTEL_METRICS_EXPORTER` | `none` | `none`, `stdout` or `otlp` |
The **test environment** is selected by `TELEGRAM_TEST_ENV=true`, which suffixes the
Bot API path with `/test` (the connector appends it to the token, since the client
builds `<host>/bot<token>/<method>`).
Validator (`cmd/validator`):
| Env var | Default | Meaning |
| --- | --- | --- |
| `TELEGRAM_VALIDATOR_GRPC_ADDR` | `:9091` | validator gRPC listen address (the gateway dials it) |
Bot (`cmd/bot`):
| Env var | Default | Meaning |
| --- | --- | --- |
| `TELEGRAM_MINIAPP_URL` | — (required) | Mini App HTTPS origin (BotFather-registered) |
| `TELEGRAM_GATEWAY_ADDR` | — (required) | the gateway bot-link endpoint to dial |
| `TELEGRAM_BOTLINK_SERVER_NAME` | — (required) | the gateway certificate's expected SNI / CN |
| `TELEGRAM_BOTLINK_TLS_CERT` / `_KEY` / `_CA` | — (required) | the bot client cert, its key, and the CA that signs the gateway server cert |
| `TELEGRAM_GAME_CHANNEL_ID` | — | the bot's game channel chat id for `SendToGameChannel` |
| `TELEGRAM_OWNS_UPDATES` | `true` | run the exclusive `getUpdates` long-poll (one bot per token) |
| `TELEGRAM_SEND_RATE_PER_SECOND` | `25` | outbound Bot API send cap (0 disables) |
| `TELEGRAM_INSTANCE_ID` | hostname | bot identity reported to the gateway |
| `TELEGRAM_BOTLINK_RECONNECT_DELAY` | `2s` | pause before re-dialing after the stream ends |
| `TELEGRAM_API_BASE_URL` | `https://api.telegram.org` | Bot API host override (mock / self-hosted) |
| `TELEGRAM_TEST_ENV` | `false` | route to the Bot API **test environment** (`/bot<token>/test/METHOD`) |
## Build, test, run
```sh
go build ./platform/telegram/...
go test ./platform/telegram/... # unit tests use an httptest fake Bot API
go run ./platform/telegram/cmd/telegram # needs a real TELEGRAM_BOT_TOKEN
go test ./platform/telegram/... # unit tests use an httptest fake Bot API + an in-process bot-link
go run ./platform/telegram/cmd/validator # needs TELEGRAM_BOT_TOKEN
go run ./platform/telegram/cmd/bot # needs the bot env above + mTLS cert files
```
## Deploy
The connector runs in its **own container** with the bot token held only there and
all egress through a VPN sidecar (`deploy/docker-compose.yml`, mirroring
`../../15-puzzle`). It needs no public ingress — it long-polls Telegram and answers
internal gRPC at `telegram:9091` on the shared `edge` network. The host reverse proxy
routes public traffic to the **gateway** port only, which serves the Mini App under
`/telegram/`. The full multi-service deploy is `deploy/docker-compose.yml`.
`platform/telegram/Dockerfile` builds both binaries on distroless nonroot with two
targets, `validator` and `bot`. In the test contour (`deploy/docker-compose.yml`) the
**validator** runs on the internal network (no VPN); the **bot** keeps a VPN sidecar
for Telegram egress and dials the gateway bot-link by its internal name. The bot-link
mTLS material is generated by `deploy/gen-certs.sh`. In prod the bot runs on a separate
host with native Telegram access and dials the gateway's published bot-link port with
`PROD_` certificates (the deferred final stage — see `PRERELEASE.md`).
A real end-to-end Telegram smoke needs a BotFather bot, its token, a public HTTPS
Mini App origin, and the connector container; the unit tests cover the wire format,
templates, deep-links and the gRPC handlers without a live bot.
A real end-to-end Telegram smoke needs a BotFather bot, its token, a public HTTPS Mini
App origin, and the bot container; the unit tests cover the wire format, templates,
deep-links, the validator handlers and the bot-link client/executor without a live bot.
+123
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@@ -0,0 +1,123 @@
// Command bot is the remote-side Telegram bot. It runs the Bot API long-poll
// (Mini App launch + /start deep-links) and dials the gateway over the reverse mTLS
// bot-link to receive and execute send commands (out-of-app push and admin sends).
// It holds the bot token and is the only component that reaches the Telegram Bot
// API, so it runs on a host with native Telegram access (no VPN) and needs no
// inbound port. See platform/telegram/README.md.
package main
import (
"context"
"log"
"os/signal"
"sync"
"syscall"
"time"
"go.uber.org/zap"
"google.golang.org/grpc/credentials"
"scrabble/pkg/mtls"
pkgtel "scrabble/pkg/telemetry"
"scrabble/platform/telegram/internal/bot"
"scrabble/platform/telegram/internal/botlink"
"scrabble/platform/telegram/internal/config"
)
// telemetryShutdownTimeout bounds the OpenTelemetry flush during process exit.
const telemetryShutdownTimeout = 5 * time.Second
func main() {
cfg, err := config.LoadBot()
if err != nil {
log.Fatalf("bot: load config: %v", err)
}
logger, err := newLogger(cfg.LogLevel)
if err != nil {
log.Fatalf("bot: build logger: %v", err)
}
defer func() { _ = logger.Sync() }()
ctx, stop := signal.NotifyContext(context.Background(), syscall.SIGINT, syscall.SIGTERM)
defer stop()
if err := run(ctx, cfg, logger); err != nil {
logger.Fatal("bot: terminated", zap.Error(err))
}
}
// run wires the bot long-poll and the bot-link client and runs both until the
// context is cancelled.
func run(ctx context.Context, cfg config.BotConfig, logger *zap.Logger) error {
tel, err := pkgtel.New(ctx, cfg.Telemetry)
if err != nil {
return err
}
defer func() {
shutdownCtx, cancel := context.WithTimeout(context.Background(), telemetryShutdownTimeout)
defer cancel()
if err := tel.Shutdown(shutdownCtx); err != nil {
logger.Warn("telemetry shutdown", zap.Error(err))
}
}()
if err := tel.StartRuntimeMetrics(); err != nil {
logger.Warn("telemetry: start runtime metrics", zap.Error(err))
}
b, err := bot.New(bot.Config{
Token: cfg.Token,
APIBaseURL: cfg.APIBaseURL,
TestEnv: cfg.TestEnv,
MiniAppURL: cfg.MiniAppURL,
SendRatePerSecond: cfg.SendRatePerSecond,
}, logger)
if err != nil {
return err
}
tlsCfg, err := mtls.ClientConfig(cfg.BotLink.CertFile, cfg.BotLink.KeyFile, cfg.BotLink.CAFile, cfg.BotLink.ServerName)
if err != nil {
return err
}
exec := botlink.NewExecutor(b, cfg.GameChannelID, logger)
client := botlink.NewClient(botlink.ClientConfig{
GatewayAddr: cfg.BotLink.GatewayAddr,
InstanceID: cfg.BotLink.InstanceID,
OwnsUpdates: cfg.OwnsUpdates,
Creds: credentials.NewTLS(tlsCfg),
ReconnectDelay: cfg.BotLink.ReconnectDelay,
}, exec, logger)
logger.Info("telegram bot starting",
zap.String("gateway", cfg.BotLink.GatewayAddr),
zap.String("miniapp_url", cfg.MiniAppURL),
zap.Bool("owns_updates", cfg.OwnsUpdates),
zap.Bool("test_env", cfg.TestEnv))
var wg sync.WaitGroup
// The long-poll holds the exclusive getUpdates lease (one bot per token); a bot
// that does not own it only delivers sends over the bot-link.
if cfg.OwnsUpdates {
wg.Go(func() { b.Run(ctx) })
}
wg.Go(func() {
if err := client.Run(ctx); err != nil && ctx.Err() == nil {
logger.Error("bot-link client stopped", zap.Error(err))
}
})
<-ctx.Done()
wg.Wait()
return nil
}
// newLogger builds a production JSON logger at the given level.
func newLogger(level string) (*zap.Logger, error) {
var lvl zap.AtomicLevel
if err := lvl.UnmarshalText([]byte(level)); err != nil {
return nil, err
}
cfg := zap.NewProductionConfig()
cfg.Level = lvl
return cfg.Build()
}
@@ -1,8 +1,9 @@
// Command telegram is the Telegram platform side-service (the "connector"). It is
// the only component holding the bot token: it runs the Bot API long-poll loop
// (Mini App launch + /start deep-links) and serves the connector gRPC API
// (pkg/proto/telegram/v1) that the gateway and backend call over the trusted
// internal network. See platform/telegram/README.md.
// Command validator is the home-side Telegram validator. It serves the validation
// gRPC API (pkg/proto/telegram/v1 ValidateInitData/ValidateLoginWidget) the gateway
// calls during Telegram auth. It holds the bot token only as the HMAC secret and
// never reaches the Telegram Bot API, so it runs on the main host with no VPN and
// no Telegram egress, and game login stays independent of the remote bot. See
// platform/telegram/README.md.
package main
import (
@@ -20,24 +21,23 @@ import (
telegramv1 "scrabble/pkg/proto/telegram/v1"
pkgtel "scrabble/pkg/telemetry"
"scrabble/platform/telegram/internal/bot"
"scrabble/platform/telegram/internal/config"
"scrabble/platform/telegram/internal/connector"
"scrabble/platform/telegram/internal/initdata"
"scrabble/platform/telegram/internal/loginwidget"
"scrabble/platform/telegram/internal/validator"
)
// telemetryShutdownTimeout bounds the OpenTelemetry flush during process exit.
const telemetryShutdownTimeout = 5 * time.Second
func main() {
cfg, err := config.Load()
cfg, err := config.LoadValidator()
if err != nil {
log.Fatalf("telegram: load config: %v", err)
log.Fatalf("validator: load config: %v", err)
}
logger, err := newLogger(cfg.LogLevel)
if err != nil {
log.Fatalf("telegram: build logger: %v", err)
log.Fatalf("validator: build logger: %v", err)
}
defer func() { _ = logger.Sync() }()
@@ -45,13 +45,12 @@ func main() {
defer stop()
if err := run(ctx, cfg, logger); err != nil {
logger.Fatal("telegram: terminated", zap.Error(err))
logger.Fatal("validator: terminated", zap.Error(err))
}
}
// run wires the bot and the gRPC server and serves both until the context is
// cancelled.
func run(ctx context.Context, cfg config.Config, logger *zap.Logger) error {
// run wires the validator gRPC server and serves it until the context is cancelled.
func run(ctx context.Context, cfg config.ValidatorConfig, logger *zap.Logger) error {
tel, err := pkgtel.New(ctx, cfg.Telemetry)
if err != nil {
return err
@@ -67,23 +66,7 @@ func run(ctx context.Context, cfg config.Config, logger *zap.Logger) error {
logger.Warn("telemetry: start runtime metrics", zap.Error(err))
}
// The single bot validates launch data and delivers push/admin messages.
b, err := bot.New(bot.Config{
Token: cfg.Token,
APIBaseURL: cfg.APIBaseURL,
TestEnv: cfg.TestEnv,
MiniAppURL: cfg.MiniAppURL,
}, logger)
if err != nil {
return err
}
srv := connector.NewServer(connector.BotRuntime{
Sender: b,
ChannelID: cfg.GameChannelID,
InitValidator: initdata.NewHMACValidator(cfg.Token),
WidgetValidator: loginwidget.NewHMACValidator(cfg.Token),
}, logger)
srv := validator.NewServer(initdata.NewHMACValidator(cfg.Token), loginwidget.NewHMACValidator(cfg.Token))
grpcServer := grpc.NewServer(grpc.StatsHandler(otelgrpc.NewServerHandler()))
telegramv1.RegisterTelegramServer(grpcServer, srv)
@@ -92,18 +75,12 @@ func run(ctx context.Context, cfg config.Config, logger *zap.Logger) error {
return err
}
// The long-poll loop and the gRPC server run together; cancelling the context
// stops the bot loop and gracefully drains the gRPC server.
go b.Run(ctx)
go func() {
<-ctx.Done()
grpcServer.GracefulStop()
}()
logger.Info("telegram connector starting",
zap.String("grpc_addr", cfg.GRPCAddr),
zap.String("miniapp_url", cfg.MiniAppURL),
zap.Bool("test_env", cfg.TestEnv))
logger.Info("telegram validator starting", zap.String("grpc_addr", cfg.GRPCAddr))
if err := grpcServer.Serve(lis); err != nil && !errors.Is(err, grpc.ErrServerStopped) {
return err
}
+1
View File
@@ -7,6 +7,7 @@ require (
github.com/google/flatbuffers v23.5.26+incompatible
go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.68.0
go.uber.org/zap v1.27.1
golang.org/x/time v0.15.0
google.golang.org/grpc v1.80.0
google.golang.org/protobuf v1.36.11
scrabble/pkg v0.0.0
+26
View File
@@ -13,6 +13,7 @@ import (
tgbot "github.com/go-telegram/bot"
"github.com/go-telegram/bot/models"
"go.uber.org/zap"
"golang.org/x/time/rate"
)
// Config configures the bot wrapper.
@@ -25,6 +26,10 @@ type Config struct {
TestEnv bool
// MiniAppURL is the base URL of the Mini App launch button.
MiniAppURL string
// SendRatePerSecond caps outbound sends (Notify and SendText) to respect the
// Telegram Bot API flood limits; 0 disables the limiter. The burst equals the
// per-second rate.
SendRatePerSecond int
}
// Bot wraps a Telegram Bot API client and the Mini App launch URL.
@@ -32,6 +37,9 @@ type Bot struct {
api *tgbot.Bot
miniAppURL string
log *zap.Logger
// limiter throttles outbound sends to stay under the Bot API flood limits; nil
// disables throttling.
limiter *rate.Limiter
}
// New builds the bot wrapper, registering the /start handler and a default handler
@@ -42,6 +50,9 @@ func New(cfg Config, log *zap.Logger) (*Bot, error) {
log = zap.NewNop()
}
t := &Bot{miniAppURL: cfg.MiniAppURL, log: log}
if cfg.SendRatePerSecond > 0 {
t.limiter = rate.NewLimiter(rate.Limit(cfg.SendRatePerSecond), cfg.SendRatePerSecond)
}
opts := []tgbot.Option{
tgbot.WithDefaultHandler(t.handleStart),
@@ -85,6 +96,9 @@ func (t *Bot) Run(ctx context.Context) {
// Notify sends a notification message with a Mini App launch button that opens the
// app at startParam (empty opens the lobby).
func (t *Bot) Notify(ctx context.Context, chatID int64, text, buttonText, startParam string) error {
if err := t.throttle(ctx); err != nil {
return err
}
_, err := t.api.SendMessage(ctx, &tgbot.SendMessageParams{
ChatID: chatID,
Text: text,
@@ -95,10 +109,22 @@ func (t *Bot) Notify(ctx context.Context, chatID int64, text, buttonText, startP
// SendText sends a plain text message with no markup (admin use).
func (t *Bot) SendText(ctx context.Context, chatID int64, text string) error {
if err := t.throttle(ctx); err != nil {
return err
}
_, err := t.api.SendMessage(ctx, &tgbot.SendMessageParams{ChatID: chatID, Text: text})
return err
}
// throttle blocks until the rate limiter admits one send, or ctx is cancelled. It
// is a no-op when no limiter is configured.
func (t *Bot) throttle(ctx context.Context) error {
if t.limiter == nil {
return nil
}
return t.limiter.Wait(ctx)
}
// handleStart replies to /start (with an optional deep-link payload) and to any
// other message with a Mini App launch button.
func (t *Bot) handleStart(ctx context.Context, api *tgbot.Bot, update *models.Update) {
@@ -0,0 +1,131 @@
package botlink
import (
"context"
"time"
"go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc"
"go.uber.org/zap"
"google.golang.org/grpc"
"google.golang.org/grpc/credentials"
"google.golang.org/grpc/keepalive"
botlinkv1 "scrabble/pkg/proto/botlink/v1"
)
const (
// clientKeepaliveTime is how often the bot pings the gateway to hold the WAN
// connection open (kept above the gateway's MinTime to avoid an enforcement ban).
clientKeepaliveTime = 30 * time.Second
// clientKeepaliveTimeout bounds the wait for a keepalive ping reply.
clientKeepaliveTimeout = 10 * time.Second
)
// ClientConfig configures the bot's dial side of the reverse bot-link.
type ClientConfig struct {
// GatewayAddr is the gateway bot-link endpoint to dial.
GatewayAddr string
// InstanceID identifies this bot to the gateway.
InstanceID string
// OwnsUpdates reports whether this bot runs the exclusive getUpdates long-poll.
OwnsUpdates bool
// Creds is the transport credentials for the dial (mutual TLS in production,
// built from pkg/mtls).
Creds credentials.TransportCredentials
// ReconnectDelay is the pause before re-dialing after the stream ends.
ReconnectDelay time.Duration
}
// Client maintains the long-lived bot-link to the gateway, executing the commands
// it receives and re-dialing after any break.
type Client struct {
cfg ClientConfig
exec *Executor
log *zap.Logger
}
// NewClient builds the bot-link client over the executor.
func NewClient(cfg ClientConfig, exec *Executor, log *zap.Logger) *Client {
if log == nil {
log = zap.NewNop()
}
return &Client{cfg: cfg, exec: exec, log: log}
}
// Run dials the gateway and keeps the bot-link open, re-dialing after each break,
// until ctx is cancelled. The gRPC connection auto-reconnects the transport; this
// loop re-opens the Link stream on top of it.
func (c *Client) Run(ctx context.Context) error {
conn, err := grpc.NewClient(c.cfg.GatewayAddr,
grpc.WithTransportCredentials(c.cfg.Creds),
grpc.WithStatsHandler(otelgrpc.NewClientHandler()),
grpc.WithKeepaliveParams(keepalive.ClientParameters{
Time: clientKeepaliveTime,
Timeout: clientKeepaliveTimeout,
PermitWithoutStream: true,
}),
)
if err != nil {
return err
}
defer func() { _ = conn.Close() }()
client := botlinkv1.NewBotLinkClient(conn)
for ctx.Err() == nil {
if err := c.serve(ctx, client); err != nil && ctx.Err() == nil {
c.log.Warn("bot-link stream ended", zap.Error(err))
}
if !sleep(ctx, c.cfg.ReconnectDelay) {
break
}
}
return ctx.Err()
}
// serve opens one Link stream, registers with a Hello, then executes commands and
// replies with an Ack each until the stream ends.
func (c *Client) serve(ctx context.Context, client botlinkv1.BotLinkClient) error {
stream, err := client.Link(ctx)
if err != nil {
return err
}
if err := stream.Send(&botlinkv1.FromBot{Msg: &botlinkv1.FromBot_Hello{Hello: &botlinkv1.Hello{
InstanceId: c.cfg.InstanceID,
OwnsUpdates: c.cfg.OwnsUpdates,
}}}); err != nil {
return err
}
c.log.Info("bot-link connected", zap.String("gateway", c.cfg.GatewayAddr), zap.Bool("owns_updates", c.cfg.OwnsUpdates))
for {
msg, err := stream.Recv()
if err != nil {
return err
}
cmd := msg.GetCommand()
if cmd == nil {
continue
}
delivered, herr := c.exec.Handle(ctx, cmd)
ack := &botlinkv1.Ack{CommandId: cmd.GetCommandId(), Delivered: delivered}
if herr != nil {
ack.Error = herr.Error()
}
if err := stream.Send(&botlinkv1.FromBot{Msg: &botlinkv1.FromBot_Ack{Ack: ack}}); err != nil {
return err
}
}
}
// sleep waits for d or until ctx is cancelled, reporting whether it waited the full
// duration.
func sleep(ctx context.Context, d time.Duration) bool {
t := time.NewTimer(d)
defer t.Stop()
select {
case <-ctx.Done():
return false
case <-t.C:
return true
}
}
@@ -0,0 +1,87 @@
package botlink
import (
"fmt"
"net"
"testing"
"time"
"google.golang.org/grpc"
"google.golang.org/grpc/credentials/insecure"
botlinkv1 "scrabble/pkg/proto/botlink/v1"
telegramv1 "scrabble/pkg/proto/telegram/v1"
)
// testLinkServer registers one bot, pushes a single Notify command, and records the
// Ack the client returns.
type testLinkServer struct {
botlinkv1.UnimplementedBotLinkServer
acks chan *botlinkv1.Ack
}
func (s *testLinkServer) Link(stream grpc.BidiStreamingServer[botlinkv1.FromBot, botlinkv1.ToBot]) error {
hello, err := stream.Recv()
if err != nil {
return err
}
if hello.GetHello() == nil {
return fmt.Errorf("first message was not Hello")
}
if err := stream.Send(&botlinkv1.ToBot{Command: &botlinkv1.Command{
CommandId: "c1",
Payload: &botlinkv1.Command_Notify{Notify: &telegramv1.NotifyRequest{
ExternalId: "12345", Kind: "your_turn",
Payload: yourTurnPayload("7c9e6679-7425-40de-944b-e07fc1f90ae7"), Language: "en",
}},
}}); err != nil {
return err
}
for {
msg, err := stream.Recv()
if err != nil {
return err
}
if ack := msg.GetAck(); ack != nil {
s.acks <- ack
return nil
}
}
}
// TestClientServesCommands verifies the bot client dials, registers, executes a
// pushed command through the executor, and acks it.
func TestClientServesCommands(t *testing.T) {
lis, err := net.Listen("tcp", "127.0.0.1:0")
if err != nil {
t.Fatalf("listen: %v", err)
}
ts := &testLinkServer{acks: make(chan *botlinkv1.Ack, 1)}
srv := grpc.NewServer()
botlinkv1.RegisterBotLinkServer(srv, ts)
go func() { _ = srv.Serve(lis) }()
t.Cleanup(srv.Stop)
sender := &fakeSender{}
client := NewClient(ClientConfig{
GatewayAddr: lis.Addr().String(),
InstanceID: "test",
Creds: insecure.NewCredentials(),
ReconnectDelay: 50 * time.Millisecond,
}, NewExecutor(sender, 0, nil), nil)
go func() { _ = client.Run(t.Context()) }()
select {
case ack := <-ts.acks:
if ack.GetCommandId() != "c1" || !ack.GetDelivered() {
t.Errorf("ack = %+v, want command_id c1 delivered=true", ack)
}
case <-time.After(2 * time.Second):
t.Fatal("server received no ack")
}
// The channel receive above happens-after the client wrote the sender call.
if len(sender.notify) != 1 || sender.notify[0].chatID != 12345 {
t.Errorf("sender notify calls = %+v, want one call to chat 12345", sender.notify)
}
}
@@ -0,0 +1,110 @@
// Package botlink is the bot side of the reverse Telegram channel: the bot dials
// the gateway over mTLS (pkg/proto/botlink/v1), opens one long-lived Link stream,
// and executes the send Commands the gateway pushes, replying with an Ack per
// command. It keeps the Bot API token and egress on the remote bot host with no
// inbound port. See docs/ARCHITECTURE.md.
package botlink
import (
"context"
"fmt"
"strconv"
"go.uber.org/zap"
botlinkv1 "scrabble/pkg/proto/botlink/v1"
telegramv1 "scrabble/pkg/proto/telegram/v1"
"scrabble/platform/telegram/internal/render"
)
// Sender delivers Telegram messages to a chat. *bot.Bot implements it.
type Sender interface {
// Notify sends a notification with a Mini App launch button to chatID.
Notify(ctx context.Context, chatID int64, text, buttonText, startParam string) error
// SendText sends a plain text message to chatID.
SendText(ctx context.Context, chatID int64, text string) error
}
// Executor turns a bot-link Command into a Bot API send. The delivered flag mirrors
// the former connector semantics (false when the kind is not rendered out-of-app,
// the user never started the bot, or no channel is configured); a returned error is
// an unexpected or malformed failure carried back in the Ack error field, distinct
// from a clean not-delivered.
type Executor struct {
sender Sender
channelID int64
log *zap.Logger
}
// NewExecutor builds the executor over a bot sender and the optional game channel.
func NewExecutor(sender Sender, channelID int64, log *zap.Logger) *Executor {
if log == nil {
log = zap.NewNop()
}
return &Executor{sender: sender, channelID: channelID, log: log}
}
// Handle dispatches one command to the matching Bot API send.
func (e *Executor) Handle(ctx context.Context, cmd *botlinkv1.Command) (bool, error) {
switch p := cmd.GetPayload().(type) {
case *botlinkv1.Command_Notify:
return e.notify(ctx, p.Notify)
case *botlinkv1.Command_SendToUser:
return e.sendToUser(ctx, p.SendToUser)
case *botlinkv1.Command_SendToChannel:
return e.sendToChannel(ctx, p.SendToChannel)
default:
return false, fmt.Errorf("botlink: empty command")
}
}
// notify renders an out-of-app push and sends it with a Mini App launch button.
func (e *Executor) notify(ctx context.Context, req *telegramv1.NotifyRequest) (bool, error) {
msg, ok := render.Render(req.GetKind(), req.GetPayload(), req.GetLanguage())
if !ok {
return false, nil
}
chat, err := parseChatID(req.GetExternalId())
if err != nil {
return false, err
}
if err := e.sender.Notify(ctx, chat, msg.Text, msg.ButtonText, msg.StartParam); err != nil {
e.log.Warn("notify delivery failed", zap.String("kind", req.GetKind()), zap.Error(err))
return false, nil
}
return true, nil
}
// sendToUser sends an admin text message to one user.
func (e *Executor) sendToUser(ctx context.Context, req *telegramv1.SendToUserRequest) (bool, error) {
chat, err := parseChatID(req.GetExternalId())
if err != nil {
return false, err
}
if err := e.sender.SendText(ctx, chat, req.GetText()); err != nil {
e.log.Warn("send to user failed", zap.Error(err))
return false, nil
}
return true, nil
}
// sendToChannel posts an admin text message to the bot's game channel.
func (e *Executor) sendToChannel(ctx context.Context, req *telegramv1.SendToGameChannelRequest) (bool, error) {
if e.channelID == 0 {
return false, fmt.Errorf("botlink: game channel is not configured")
}
if err := e.sender.SendText(ctx, e.channelID, req.GetText()); err != nil {
e.log.Warn("send to channel failed", zap.Error(err))
return false, nil
}
return true, nil
}
// parseChatID converts a Telegram identity external_id into a numeric chat id.
func parseChatID(externalID string) (int64, error) {
id, err := strconv.ParseInt(externalID, 10, 64)
if err != nil {
return 0, fmt.Errorf("invalid external_id %q", externalID)
}
return id, nil
}
@@ -0,0 +1,129 @@
package botlink
import (
"context"
"testing"
flatbuffers "github.com/google/flatbuffers/go"
"scrabble/pkg/fbs/scrabblefb"
botlinkv1 "scrabble/pkg/proto/botlink/v1"
telegramv1 "scrabble/pkg/proto/telegram/v1"
)
// fakeSender records the delivery calls the executor makes.
type fakeSender struct {
notify []notifyCall
text []textCall
err error
}
type notifyCall struct {
chatID int64
text, buttonText, startParam string
}
type textCall struct {
chatID int64
text string
}
func (f *fakeSender) Notify(_ context.Context, chatID int64, text, buttonText, startParam string) error {
f.notify = append(f.notify, notifyCall{chatID, text, buttonText, startParam})
return f.err
}
func (f *fakeSender) SendText(_ context.Context, chatID int64, text string) error {
f.text = append(f.text, textCall{chatID, text})
return f.err
}
func yourTurnPayload(gameID string) []byte {
b := flatbuffers.NewBuilder(0)
gid := b.CreateString(gameID)
scrabblefb.YourTurnEventStart(b)
scrabblefb.YourTurnEventAddGameId(b, gid)
b.Finish(scrabblefb.YourTurnEventEnd(b))
return b.FinishedBytes()
}
func notifyCmd(externalID, kind string, payload []byte, language string) *botlinkv1.Command {
return &botlinkv1.Command{Payload: &botlinkv1.Command_Notify{Notify: &telegramv1.NotifyRequest{
ExternalId: externalID, Kind: kind, Payload: payload, Language: language,
}}}
}
func TestExecutorNotifyDelivers(t *testing.T) {
const gameID = "7c9e6679-7425-40de-944b-e07fc1f90ae7"
sender := &fakeSender{}
exec := NewExecutor(sender, 0, nil)
delivered, err := exec.Handle(context.Background(), notifyCmd("12345", "your_turn", yourTurnPayload(gameID), "en"))
if err != nil {
t.Fatalf("handle: %v", err)
}
if !delivered {
t.Fatal("expected delivered=true")
}
if len(sender.notify) != 1 {
t.Fatalf("notify calls = %d, want 1", len(sender.notify))
}
if got := sender.notify[0]; got.chatID != 12345 || got.startParam != "g"+gameID {
t.Errorf("notify call = %+v, want chatID 12345 startParam g%s", got, gameID)
}
}
func TestExecutorNotifySkipsUnrenderedKind(t *testing.T) {
sender := &fakeSender{}
exec := NewExecutor(sender, 0, nil)
delivered, err := exec.Handle(context.Background(), notifyCmd("12345", "opponent_moved", nil, "en"))
if err != nil {
t.Fatalf("handle: %v", err)
}
if delivered {
t.Error("expected delivered=false for an unrendered kind")
}
if len(sender.notify) != 0 {
t.Errorf("sender called %d times, want 0", len(sender.notify))
}
}
func TestExecutorNotifyInvalidExternalID(t *testing.T) {
exec := NewExecutor(&fakeSender{}, 0, nil)
if _, err := exec.Handle(context.Background(), notifyCmd("not-a-number", "your_turn", yourTurnPayload("g"), "en")); err == nil {
t.Error("expected an error for a non-numeric external_id")
}
}
func TestExecutorSendToUser(t *testing.T) {
sender := &fakeSender{}
exec := NewExecutor(sender, 0, nil)
cmd := &botlinkv1.Command{Payload: &botlinkv1.Command_SendToUser{SendToUser: &telegramv1.SendToUserRequest{ExternalId: "999", Text: "hi"}}}
delivered, err := exec.Handle(context.Background(), cmd)
if err != nil {
t.Fatalf("handle: %v", err)
}
if !delivered || len(sender.text) != 1 || sender.text[0].chatID != 999 || sender.text[0].text != "hi" {
t.Errorf("send to user = %v / calls %+v", delivered, sender.text)
}
}
func TestExecutorSendToChannel(t *testing.T) {
channelCmd := &botlinkv1.Command{Payload: &botlinkv1.Command_SendToChannel{SendToChannel: &telegramv1.SendToGameChannelRequest{Text: "news"}}}
t.Run("unconfigured", func(t *testing.T) {
exec := NewExecutor(&fakeSender{}, 0, nil)
if _, err := exec.Handle(context.Background(), channelCmd); err == nil {
t.Error("expected an error when no channel is configured")
}
})
t.Run("configured", func(t *testing.T) {
sender := &fakeSender{}
exec := NewExecutor(sender, 555, nil)
delivered, err := exec.Handle(context.Background(), channelCmd)
if err != nil {
t.Fatalf("handle: %v", err)
}
if !delivered || len(sender.text) != 1 || sender.text[0].chatID != 555 {
t.Errorf("send to channel: %+v", sender.text)
}
})
}
+195 -49
View File
@@ -1,4 +1,8 @@
// Package config loads the Telegram connector's environment configuration.
// Package config loads the environment configuration for the two Telegram
// platform binaries: the home validator (HMAC of Mini App / Login Widget data, no
// Telegram egress) and the remote bot (Bot API long-poll + sendMessage, dialing
// the gateway over the reverse mTLS bot-link). The bot token lives in both
// processes — the validator needs it only as the HMAC secret (ARCHITECTURE.md §12).
package config
import (
@@ -6,73 +10,173 @@ import (
"os"
"strconv"
"strings"
"time"
pkgtel "scrabble/pkg/telemetry"
)
// Config is the Telegram connector's runtime configuration, read from the
// environment. The bot token lives only in this process (ARCHITECTURE.md §12).
type Config struct {
// Token is the Telegram Bot API token (TELEGRAM_BOT_TOKEN, required). It both
// authenticates the Bot API client and is the HMAC secret for Mini App initData
// and Login Widget validation.
// ValidatorConfig is the home validator's runtime configuration.
type ValidatorConfig struct {
// Token is the Telegram Bot API token (TELEGRAM_BOT_TOKEN, required). The
// validator uses it only as the HMAC secret for Mini App initData and Login
// Widget validation; it never calls the Bot API.
Token string
// GameChannelID is the chat id of the bot's game channel for SendToGameChannel
// (TELEGRAM_GAME_CHANNEL_ID, optional; 0 disables channel posts).
GameChannelID int64
// GRPCAddr is the listen address of the connector gRPC server that gateway and
// backend call (TELEGRAM_GRPC_ADDR, default :9091).
// GRPCAddr is the listen address of the validator gRPC server the gateway calls
// (TELEGRAM_VALIDATOR_GRPC_ADDR, default :9091).
GRPCAddr string
// MiniAppURL is the HTTPS origin of the Mini App registered with BotFather; it
// is the base of every launch button, to which a deep-link adds a startapp
// query parameter (TELEGRAM_MINIAPP_URL, required).
MiniAppURL string
// APIBaseURL overrides the Bot API host (TELEGRAM_API_BASE_URL, optional;
// default https://api.telegram.org) — used for a local mock or a self-hosted
// Bot API server.
APIBaseURL string
// TestEnv routes the Bot API client to Telegram's test environment
// (.../bot<token>/test/METHOD) (TELEGRAM_TEST_ENV=true, default false).
TestEnv bool
// LogLevel is the zap log level (TELEGRAM_LOG_LEVEL, default info).
LogLevel string
// Telemetry configures the OpenTelemetry providers (shared bootstrap).
Telemetry pkgtel.Config
}
// Load reads the connector configuration from the environment, applying defaults
// and validating the required fields.
func Load() (Config, error) {
cfg := Config{
Token: os.Getenv("TELEGRAM_BOT_TOKEN"),
GRPCAddr: envOr("TELEGRAM_GRPC_ADDR", ":9091"),
MiniAppURL: os.Getenv("TELEGRAM_MINIAPP_URL"),
APIBaseURL: os.Getenv("TELEGRAM_API_BASE_URL"),
TestEnv: os.Getenv("TELEGRAM_TEST_ENV") == "true",
LogLevel: envOr("TELEGRAM_LOG_LEVEL", "info"),
// BotConfig is the remote bot's runtime configuration.
type BotConfig struct {
// Token is the Telegram Bot API token (TELEGRAM_BOT_TOKEN, required).
Token string
// GameChannelID is the chat id of the bot's game channel for the admin channel
// post (TELEGRAM_GAME_CHANNEL_ID, optional; 0 disables channel posts).
GameChannelID int64
// MiniAppURL is the HTTPS origin of the Mini App registered with BotFather; it is
// the base of every launch button (TELEGRAM_MINIAPP_URL, required).
MiniAppURL string
// APIBaseURL overrides the Bot API host (TELEGRAM_API_BASE_URL, optional;
// default https://api.telegram.org).
APIBaseURL string
// TestEnv routes the Bot API client to Telegram's test environment
// (TELEGRAM_TEST_ENV=true, default false).
TestEnv bool
// OwnsUpdates reports whether this bot runs the exclusive getUpdates long-poll
// (TELEGRAM_OWNS_UPDATES, default true). Exactly one bot per token must own it.
OwnsUpdates bool
// SendRatePerSecond caps outbound Bot API sends to respect Telegram flood limits
// (TELEGRAM_SEND_RATE_PER_SECOND, default 25; 0 disables the limiter).
SendRatePerSecond int
// BotLink configures the reverse mTLS channel the bot dials.
BotLink BotLinkClientConfig
// LogLevel is the zap log level (TELEGRAM_LOG_LEVEL, default info).
LogLevel string
// Telemetry configures the OpenTelemetry providers (shared bootstrap).
Telemetry pkgtel.Config
}
// BotLinkClientConfig is the bot's dial side of the reverse bot-link.
type BotLinkClientConfig struct {
// GatewayAddr is the gateway bot-link endpoint to dial (TELEGRAM_GATEWAY_ADDR,
// required), e.g. "gateway.example.com:9443".
GatewayAddr string
// ServerName is the gateway certificate's expected SNI / CN
// (TELEGRAM_BOTLINK_SERVER_NAME, required).
ServerName string
// InstanceID identifies this bot to the gateway (TELEGRAM_INSTANCE_ID, default
// the hostname).
InstanceID string
// CertFile, KeyFile and CAFile are the bot client certificate, its key and the
// CA bundle that signs the gateway server certificate (required).
CertFile string
KeyFile string
CAFile string
// ReconnectDelay is the pause before re-dialing after the stream ends
// (TELEGRAM_BOTLINK_RECONNECT_DELAY, default 2s).
ReconnectDelay time.Duration
}
const (
defaultValidatorGRPCAddr = ":9091"
defaultBotReconnectDelay = 2 * time.Second
defaultSendRatePerSecond = 25
)
// LoadValidator reads the validator configuration from the environment.
func LoadValidator() (ValidatorConfig, error) {
cfg := ValidatorConfig{
Token: os.Getenv("TELEGRAM_BOT_TOKEN"),
GRPCAddr: envOr("TELEGRAM_VALIDATOR_GRPC_ADDR", defaultValidatorGRPCAddr),
LogLevel: envOr("TELEGRAM_LOG_LEVEL", "info"),
}
if v := strings.TrimSpace(os.Getenv("TELEGRAM_GAME_CHANNEL_ID")); v != "" {
id, err := strconv.ParseInt(v, 10, 64)
if err != nil {
return Config{}, fmt.Errorf("config: TELEGRAM_GAME_CHANNEL_ID %q: %w", v, err)
}
cfg.GameChannelID = id
tel, err := loadTelemetry("scrabble-telegram-validator")
if err != nil {
return ValidatorConfig{}, err
}
tel := pkgtel.DefaultConfig("scrabble-telegram")
cfg.Telemetry = tel
if cfg.Token == "" {
return ValidatorConfig{}, fmt.Errorf("config: TELEGRAM_BOT_TOKEN is required")
}
return cfg, nil
}
// LoadBot reads the bot configuration from the environment.
func LoadBot() (BotConfig, error) {
cfg := BotConfig{
Token: os.Getenv("TELEGRAM_BOT_TOKEN"),
MiniAppURL: os.Getenv("TELEGRAM_MINIAPP_URL"),
APIBaseURL: os.Getenv("TELEGRAM_API_BASE_URL"),
TestEnv: os.Getenv("TELEGRAM_TEST_ENV") == "true",
OwnsUpdates: os.Getenv("TELEGRAM_OWNS_UPDATES") != "false",
SendRatePerSecond: defaultSendRatePerSecond,
LogLevel: envOr("TELEGRAM_LOG_LEVEL", "info"),
BotLink: BotLinkClientConfig{
GatewayAddr: os.Getenv("TELEGRAM_GATEWAY_ADDR"),
ServerName: os.Getenv("TELEGRAM_BOTLINK_SERVER_NAME"),
InstanceID: envOr("TELEGRAM_INSTANCE_ID", hostname()),
CertFile: os.Getenv("TELEGRAM_BOTLINK_TLS_CERT"),
KeyFile: os.Getenv("TELEGRAM_BOTLINK_TLS_KEY"),
CAFile: os.Getenv("TELEGRAM_BOTLINK_TLS_CA"),
},
}
var err error
if cfg.GameChannelID, err = envInt64("TELEGRAM_GAME_CHANNEL_ID", 0); err != nil {
return BotConfig{}, err
}
if cfg.SendRatePerSecond, err = envInt("TELEGRAM_SEND_RATE_PER_SECOND", defaultSendRatePerSecond); err != nil {
return BotConfig{}, err
}
if cfg.BotLink.ReconnectDelay, err = envDuration("TELEGRAM_BOTLINK_RECONNECT_DELAY", defaultBotReconnectDelay); err != nil {
return BotConfig{}, err
}
tel, err := loadTelemetry("scrabble-telegram-bot")
if err != nil {
return BotConfig{}, err
}
cfg.Telemetry = tel
if cfg.Token == "" {
return BotConfig{}, fmt.Errorf("config: TELEGRAM_BOT_TOKEN is required")
}
if cfg.MiniAppURL == "" {
return BotConfig{}, fmt.Errorf("config: TELEGRAM_MINIAPP_URL is required")
}
if cfg.BotLink.GatewayAddr == "" {
return BotConfig{}, fmt.Errorf("config: TELEGRAM_GATEWAY_ADDR is required")
}
if cfg.BotLink.ServerName == "" {
return BotConfig{}, fmt.Errorf("config: TELEGRAM_BOTLINK_SERVER_NAME is required")
}
if cfg.BotLink.CertFile == "" || cfg.BotLink.KeyFile == "" || cfg.BotLink.CAFile == "" {
return BotConfig{}, fmt.Errorf("config: TELEGRAM_BOTLINK_TLS_CERT, _KEY and _CA are required")
}
return cfg, nil
}
// loadTelemetry builds the shared OpenTelemetry config with the given default
// service name, applying the TELEGRAM_* overrides and validating the result.
func loadTelemetry(defaultService string) (pkgtel.Config, error) {
tel := pkgtel.DefaultConfig(defaultService)
tel.ServiceName = envOr("TELEGRAM_SERVICE_NAME", tel.ServiceName)
tel.TracesExporter = envOr("TELEGRAM_OTEL_TRACES_EXPORTER", tel.TracesExporter)
tel.MetricsExporter = envOr("TELEGRAM_OTEL_METRICS_EXPORTER", tel.MetricsExporter)
cfg.Telemetry = tel
if cfg.Token == "" {
return Config{}, fmt.Errorf("config: TELEGRAM_BOT_TOKEN is required")
if err := tel.Validate(); err != nil {
return pkgtel.Config{}, fmt.Errorf("config: %w", err)
}
if cfg.MiniAppURL == "" {
return Config{}, fmt.Errorf("config: TELEGRAM_MINIAPP_URL is required")
return tel, nil
}
// hostname returns the machine hostname, or "telegram-bot" when it cannot be read.
func hostname() string {
if h, err := os.Hostname(); err == nil && h != "" {
return h
}
if err := cfg.Telemetry.Validate(); err != nil {
return Config{}, fmt.Errorf("config: %w", err)
}
return cfg, nil
return "telegram-bot"
}
// envOr returns the environment value for key, or def when it is unset or empty.
@@ -82,3 +186,45 @@ func envOr(key, def string) string {
}
return def
}
// envInt parses the environment variable named key as an int, returning fallback
// when unset and an error when set but malformed.
func envInt(key string, fallback int) (int, error) {
v := strings.TrimSpace(os.Getenv(key))
if v == "" {
return fallback, nil
}
n, err := strconv.Atoi(v)
if err != nil {
return 0, fmt.Errorf("config: %s %q: %w", key, v, err)
}
return n, nil
}
// envInt64 parses the environment variable named key as an int64, returning
// fallback when unset and an error when set but malformed.
func envInt64(key string, fallback int64) (int64, error) {
v := strings.TrimSpace(os.Getenv(key))
if v == "" {
return fallback, nil
}
n, err := strconv.ParseInt(v, 10, 64)
if err != nil {
return 0, fmt.Errorf("config: %s %q: %w", key, v, err)
}
return n, nil
}
// envDuration parses the environment variable named key as a Go duration,
// returning fallback when unset and an error when set but malformed.
func envDuration(key string, fallback time.Duration) (time.Duration, error) {
v := strings.TrimSpace(os.Getenv(key))
if v == "" {
return fallback, nil
}
d, err := time.ParseDuration(v)
if err != nil {
return 0, fmt.Errorf("config: %s %q: %w", key, v, err)
}
return d, nil
}
@@ -6,71 +6,110 @@ import (
pkgtel "scrabble/pkg/telemetry"
)
// setRequired sets the required connector variables (the bot token + the Mini App
// URL) so Load reaches the telemetry checks.
func setRequired(t *testing.T) {
// setBotRequired sets every required bot variable so LoadBot reaches the optional
// parsing and telemetry checks.
func setBotRequired(t *testing.T) {
t.Helper()
t.Setenv("TELEGRAM_BOT_TOKEN", "test-token")
t.Setenv("TELEGRAM_BOT_TOKEN", "bot-token")
t.Setenv("TELEGRAM_MINIAPP_URL", "https://example.org/app")
t.Setenv("TELEGRAM_GATEWAY_ADDR", "gateway.example.org:9443")
t.Setenv("TELEGRAM_BOTLINK_SERVER_NAME", "gateway.example.org")
t.Setenv("TELEGRAM_BOTLINK_TLS_CERT", "/certs/bot.crt")
t.Setenv("TELEGRAM_BOTLINK_TLS_KEY", "/certs/bot.key")
t.Setenv("TELEGRAM_BOTLINK_TLS_CA", "/certs/ca.crt")
}
// TestLoadBot verifies the bot parsing: the token is read and the game channel id is
// parsed when present.
func TestLoadBot(t *testing.T) {
t.Setenv("TELEGRAM_MINIAPP_URL", "https://example.org/app")
t.Setenv("TELEGRAM_BOT_TOKEN", "bot-token")
t.Setenv("TELEGRAM_GAME_CHANNEL_ID", "-100111")
c, err := Load()
// TestLoadValidator verifies the validator reads the token, defaults its address
// and names its telemetry service.
func TestLoadValidator(t *testing.T) {
t.Setenv("TELEGRAM_BOT_TOKEN", "secret")
c, err := LoadValidator()
if err != nil {
t.Fatalf("Load: %v", err)
t.Fatalf("LoadValidator: %v", err)
}
if c.Token != "secret" {
t.Errorf("Token = %q, want secret", c.Token)
}
if c.GRPCAddr != defaultValidatorGRPCAddr {
t.Errorf("GRPCAddr = %q, want %q", c.GRPCAddr, defaultValidatorGRPCAddr)
}
if c.Telemetry.ServiceName != "scrabble-telegram-validator" {
t.Errorf("ServiceName = %q, want scrabble-telegram-validator", c.Telemetry.ServiceName)
}
}
// TestLoadValidatorRequiresToken verifies the validator fails without a token.
func TestLoadValidatorRequiresToken(t *testing.T) {
t.Setenv("TELEGRAM_BOT_TOKEN", "")
if _, err := LoadValidator(); err == nil {
t.Fatal("LoadValidator: expected an error without a token, got nil")
}
}
// TestLoadBot verifies the bot parses the token, channel id and owns_updates and
// names its telemetry service.
func TestLoadBot(t *testing.T) {
setBotRequired(t)
t.Setenv("TELEGRAM_GAME_CHANNEL_ID", "-100111")
c, err := LoadBot()
if err != nil {
t.Fatalf("LoadBot: %v", err)
}
if c.Token != "bot-token" || c.GameChannelID != -100111 {
t.Errorf("config = token %q / channel %d, want bot-token / -100111", c.Token, c.GameChannelID)
}
if !c.OwnsUpdates {
t.Error("OwnsUpdates = false, want true by default")
}
if c.SendRatePerSecond != defaultSendRatePerSecond {
t.Errorf("SendRatePerSecond = %d, want %d", c.SendRatePerSecond, defaultSendRatePerSecond)
}
if c.Telemetry.ServiceName != "scrabble-telegram-bot" {
t.Errorf("ServiceName = %q, want scrabble-telegram-bot", c.Telemetry.ServiceName)
}
}
// TestLoadOptionalChannel verifies the game channel id defaults to 0 when unset.
func TestLoadOptionalChannel(t *testing.T) {
setRequired(t)
c, err := Load()
// TestLoadBotOwnsUpdatesOptOut verifies TELEGRAM_OWNS_UPDATES=false disables the
// long-poll ownership.
func TestLoadBotOwnsUpdatesOptOut(t *testing.T) {
setBotRequired(t)
t.Setenv("TELEGRAM_OWNS_UPDATES", "false")
c, err := LoadBot()
if err != nil {
t.Fatalf("Load: %v", err)
t.Fatalf("LoadBot: %v", err)
}
if c.GameChannelID != 0 {
t.Errorf("GameChannelID = %d, want 0", c.GameChannelID)
if c.OwnsUpdates {
t.Error("OwnsUpdates = true, want false")
}
}
// TestLoadRequiresBot verifies Load fails when no bot token is configured.
func TestLoadRequiresBot(t *testing.T) {
t.Setenv("TELEGRAM_MINIAPP_URL", "https://example.org/app")
if _, err := Load(); err == nil {
t.Fatal("Load: expected an error when no bot token is set, got nil")
// TestLoadBotRequired verifies LoadBot fails when a required variable is missing.
func TestLoadBotRequired(t *testing.T) {
cases := []string{
"TELEGRAM_BOT_TOKEN",
"TELEGRAM_MINIAPP_URL",
"TELEGRAM_GATEWAY_ADDR",
"TELEGRAM_BOTLINK_SERVER_NAME",
"TELEGRAM_BOTLINK_TLS_CERT",
}
for _, missing := range cases {
t.Run(missing, func(t *testing.T) {
setBotRequired(t)
t.Setenv(missing, "")
if _, err := LoadBot(); err == nil {
t.Fatalf("LoadBot: expected an error without %s, got nil", missing)
}
})
}
}
// TestLoadTelemetryDefaults verifies the connector telemetry defaults: the
// "scrabble-telegram" service name and both exporters off.
func TestLoadTelemetryDefaults(t *testing.T) {
setRequired(t)
c, err := Load()
if err != nil {
t.Fatalf("Load: %v", err)
}
if c.Telemetry.ServiceName != "scrabble-telegram" {
t.Errorf("Telemetry.ServiceName = %q, want scrabble-telegram", c.Telemetry.ServiceName)
}
if c.Telemetry.TracesExporter != pkgtel.ExporterNone || c.Telemetry.MetricsExporter != pkgtel.ExporterNone {
t.Errorf("exporters = %q/%q, want none/none", c.Telemetry.TracesExporter, c.Telemetry.MetricsExporter)
}
}
// TestLoadRejectsUnsupportedExporter verifies an exporter outside the supported
// set fails validation.
// TestLoadRejectsUnsupportedExporter verifies an exporter outside the supported set
// fails validation (the validator path).
func TestLoadRejectsUnsupportedExporter(t *testing.T) {
setRequired(t)
t.Setenv("TELEGRAM_BOT_TOKEN", "secret")
t.Setenv("TELEGRAM_OTEL_TRACES_EXPORTER", "jaeger")
if _, err := Load(); err == nil {
t.Fatal("Load: expected an error for an unsupported exporter, got nil")
if _, err := LoadValidator(); err == nil {
t.Fatal("LoadValidator: expected an error for an unsupported exporter, got nil")
}
_ = pkgtel.ExporterNone
}
@@ -1,147 +0,0 @@
// Package connector implements the Telegram gRPC service (pkg/proto/telegram/v1):
// the gateway calls ValidateInitData (Mini App auth) and Notify (out-of-app push);
// the admin surface calls SendToUser and SendToGameChannel. The generic
// methods address a recipient by the identity external_id, so a future platform
// connector can implement the same service.
//
// The connector hosts a single bot. ValidateInitData/ValidateLoginWidget verify
// launch data against its token; Notify renders the message in the recipient's
// interface language (the single bot needs no routing); the admin methods deliver
// through that bot.
package connector
import (
"context"
"fmt"
"strconv"
"go.uber.org/zap"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
telegramv1 "scrabble/pkg/proto/telegram/v1"
"scrabble/platform/telegram/internal/initdata"
"scrabble/platform/telegram/internal/loginwidget"
"scrabble/platform/telegram/internal/render"
)
// Sender delivers Telegram messages to a chat. *bot.Bot implements it.
type Sender interface {
// Notify sends a notification with a Mini App launch button to chatID.
Notify(ctx context.Context, chatID int64, text, buttonText, startParam string) error
// SendText sends a plain text message to chatID.
SendText(ctx context.Context, chatID int64, text string) error
}
// BotRuntime is the configured bot: its sender, game channel id, and the two HMAC
// validators bound to its token.
type BotRuntime struct {
// Sender delivers messages through the bot.
Sender Sender
// ChannelID is the bot's game channel (0 disables channel posts).
ChannelID int64
// InitValidator verifies Mini App initData signed by the bot's token.
InitValidator initdata.Validator
// WidgetValidator verifies Login Widget data signed by the bot's token.
WidgetValidator loginwidget.Validator
}
// Server implements telegramv1.TelegramServer over the single configured bot.
type Server struct {
telegramv1.UnimplementedTelegramServer
bot BotRuntime
log *zap.Logger
}
// NewServer builds the gRPC service from the configured bot.
func NewServer(bot BotRuntime, log *zap.Logger) *Server {
if log == nil {
log = zap.NewNop()
}
return &Server{bot: bot, log: log}
}
// ValidateInitData verifies Mini App launch data against the bot's token and returns
// the user identity.
func (s *Server) ValidateInitData(ctx context.Context, req *telegramv1.ValidateInitDataRequest) (*telegramv1.ValidateInitDataResponse, error) {
u, err := s.bot.InitValidator.Validate(req.GetInitData())
if err != nil {
return nil, status.Error(codes.InvalidArgument, err.Error())
}
return &telegramv1.ValidateInitDataResponse{
ExternalId: u.ExternalID,
Username: u.Username,
FirstName: u.FirstName,
LanguageCode: u.LanguageCode,
}, nil
}
// ValidateLoginWidget verifies Login Widget authorization data against the bot's
// token and returns the user identity, for attaching a Telegram identity to an
// existing account.
func (s *Server) ValidateLoginWidget(ctx context.Context, req *telegramv1.ValidateLoginWidgetRequest) (*telegramv1.ValidateLoginWidgetResponse, error) {
u, err := s.bot.WidgetValidator.Validate(req.GetData())
if err != nil {
return nil, status.Error(codes.InvalidArgument, err.Error())
}
return &telegramv1.ValidateLoginWidgetResponse{
ExternalId: u.ExternalID,
Username: u.Username,
FirstName: u.FirstName,
}, nil
}
// Notify renders and delivers an out-of-app notification through the bot. The message
// is rendered in the recipient's interface language (req language). It reports
// delivered=false (without an error) when the kind is not pushed out-of-app or the
// bot could not deliver (e.g. the user never started it), so the gateway treats a
// fallback miss as best-effort.
func (s *Server) Notify(ctx context.Context, req *telegramv1.NotifyRequest) (*telegramv1.NotifyResponse, error) {
msg, ok := render.Render(req.GetKind(), req.GetPayload(), req.GetLanguage())
if !ok {
return &telegramv1.NotifyResponse{Delivered: false}, nil
}
chat, err := parseChatID(req.GetExternalId())
if err != nil {
return nil, status.Error(codes.InvalidArgument, err.Error())
}
if err := s.bot.Sender.Notify(ctx, chat, msg.Text, msg.ButtonText, msg.StartParam); err != nil {
s.log.Warn("notify delivery failed", zap.String("kind", req.GetKind()), zap.Error(err))
return &telegramv1.NotifyResponse{Delivered: false}, nil
}
return &telegramv1.NotifyResponse{Delivered: true}, nil
}
// SendToUser sends an arbitrary admin message to one user through the bot.
func (s *Server) SendToUser(ctx context.Context, req *telegramv1.SendToUserRequest) (*telegramv1.SendResponse, error) {
chat, err := parseChatID(req.GetExternalId())
if err != nil {
return nil, status.Error(codes.InvalidArgument, err.Error())
}
if err := s.bot.Sender.SendText(ctx, chat, req.GetText()); err != nil {
s.log.Warn("send to user failed", zap.Error(err))
return &telegramv1.SendResponse{Delivered: false}, nil
}
return &telegramv1.SendResponse{Delivered: true}, nil
}
// SendToGameChannel posts an arbitrary admin message to the bot's game channel.
func (s *Server) SendToGameChannel(ctx context.Context, req *telegramv1.SendToGameChannelRequest) (*telegramv1.SendResponse, error) {
if s.bot.ChannelID == 0 {
return nil, status.Error(codes.FailedPrecondition, "game channel is not configured")
}
if err := s.bot.Sender.SendText(ctx, s.bot.ChannelID, req.GetText()); err != nil {
s.log.Warn("send to channel failed", zap.Error(err))
return &telegramv1.SendResponse{Delivered: false}, nil
}
return &telegramv1.SendResponse{Delivered: true}, nil
}
// parseChatID converts a Telegram identity external_id into a numeric chat id.
func parseChatID(externalID string) (int64, error) {
id, err := strconv.ParseInt(externalID, 10, 64)
if err != nil {
return 0, fmt.Errorf("invalid external_id %q", externalID)
}
return id, nil
}
@@ -1,186 +0,0 @@
package connector
import (
"context"
"testing"
flatbuffers "github.com/google/flatbuffers/go"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
"scrabble/pkg/fbs/scrabblefb"
telegramv1 "scrabble/pkg/proto/telegram/v1"
"scrabble/platform/telegram/internal/initdata"
"scrabble/platform/telegram/internal/loginwidget"
)
// stubValidator returns a fixed user / error from Validate.
type stubValidator struct {
user initdata.User
err error
}
func (s stubValidator) Validate(string) (initdata.User, error) { return s.user, s.err }
// stubWidgetValidator returns a fixed user / error from the Login Widget Validate.
type stubWidgetValidator struct {
user loginwidget.User
err error
}
func (s stubWidgetValidator) Validate(string) (loginwidget.User, error) { return s.user, s.err }
// fakeSender records the delivery calls the server makes.
type fakeSender struct {
notify []notifyCall
text []textCall
err error
}
type notifyCall struct {
chatID int64
text, buttonText, startParam string
}
type textCall struct {
chatID int64
text string
}
func (f *fakeSender) Notify(_ context.Context, chatID int64, text, buttonText, startParam string) error {
f.notify = append(f.notify, notifyCall{chatID, text, buttonText, startParam})
return f.err
}
func (f *fakeSender) SendText(_ context.Context, chatID int64, text string) error {
f.text = append(f.text, textCall{chatID, text})
return f.err
}
// botRT assembles the bot runtime for a test.
func botRT(sender Sender, channelID int64, iv initdata.Validator, wv loginwidget.Validator) BotRuntime {
return BotRuntime{Sender: sender, ChannelID: channelID, InitValidator: iv, WidgetValidator: wv}
}
func yourTurnPayload(gameID string) []byte {
b := flatbuffers.NewBuilder(0)
gid := b.CreateString(gameID)
scrabblefb.YourTurnEventStart(b)
scrabblefb.YourTurnEventAddGameId(b, gid)
b.Finish(scrabblefb.YourTurnEventEnd(b))
return b.FinishedBytes()
}
func TestValidateInitData(t *testing.T) {
want := initdata.User{ExternalID: "42", Username: "neo", FirstName: "Thomas", LanguageCode: "en-GB"}
srv := NewServer(botRT(&fakeSender{}, 0, stubValidator{user: want}, stubWidgetValidator{}), nil)
resp, err := srv.ValidateInitData(context.Background(), &telegramv1.ValidateInitDataRequest{InitData: "x"})
if err != nil {
t.Fatalf("validate: %v", err)
}
if resp.GetExternalId() != "42" || resp.GetUsername() != "neo" || resp.GetFirstName() != "Thomas" || resp.GetLanguageCode() != "en-GB" {
t.Errorf("resp = %+v, want %+v", resp, want)
}
bad := NewServer(botRT(&fakeSender{}, 0, stubValidator{err: initdata.ErrInvalidInitData}, stubWidgetValidator{}), nil)
if _, err := bad.ValidateInitData(context.Background(), &telegramv1.ValidateInitDataRequest{}); status.Code(err) != codes.InvalidArgument {
t.Errorf("err code = %v, want InvalidArgument", status.Code(err))
}
}
func TestValidateLoginWidget(t *testing.T) {
want := loginwidget.User{ExternalID: "42", Username: "neo", FirstName: "Thomas"}
srv := NewServer(botRT(&fakeSender{}, 0, stubValidator{}, stubWidgetValidator{user: want}), nil)
resp, err := srv.ValidateLoginWidget(context.Background(), &telegramv1.ValidateLoginWidgetRequest{Data: "x"})
if err != nil {
t.Fatalf("validate: %v", err)
}
if resp.GetExternalId() != "42" || resp.GetUsername() != "neo" || resp.GetFirstName() != "Thomas" {
t.Errorf("resp = %+v, want %+v", resp, want)
}
bad := NewServer(botRT(&fakeSender{}, 0, stubValidator{}, stubWidgetValidator{err: loginwidget.ErrInvalidLoginWidget}), nil)
if _, err := bad.ValidateLoginWidget(context.Background(), &telegramv1.ValidateLoginWidgetRequest{}); status.Code(err) != codes.InvalidArgument {
t.Errorf("err code = %v, want InvalidArgument", status.Code(err))
}
}
func TestNotifyDelivers(t *testing.T) {
const gameID = "7c9e6679-7425-40de-944b-e07fc1f90ae7"
sender := &fakeSender{}
srv := NewServer(botRT(sender, 0, stubValidator{}, stubWidgetValidator{}), nil)
resp, err := srv.Notify(context.Background(), &telegramv1.NotifyRequest{
ExternalId: "12345", Kind: "your_turn", Payload: yourTurnPayload(gameID), Language: "en",
})
if err != nil {
t.Fatalf("notify: %v", err)
}
if !resp.GetDelivered() {
t.Fatal("expected delivered=true")
}
if len(sender.notify) != 1 {
t.Fatalf("notify calls = %d, want 1", len(sender.notify))
}
if got := sender.notify[0]; got.chatID != 12345 || got.startParam != "g"+gameID {
t.Errorf("notify call = %+v, want chatID 12345 startParam g%s", got, gameID)
}
}
func TestNotifySkipsUnrenderedKind(t *testing.T) {
sender := &fakeSender{}
srv := NewServer(botRT(sender, 0, stubValidator{}, stubWidgetValidator{}), nil)
resp, err := srv.Notify(context.Background(), &telegramv1.NotifyRequest{
ExternalId: "12345", Kind: "opponent_moved", Language: "en",
})
if err != nil {
t.Fatalf("notify: %v", err)
}
if resp.GetDelivered() {
t.Error("expected delivered=false for an unrendered kind")
}
if len(sender.notify) != 0 {
t.Errorf("sender called %d times, want 0", len(sender.notify))
}
}
func TestNotifyInvalidExternalID(t *testing.T) {
srv := NewServer(botRT(&fakeSender{}, 0, stubValidator{}, stubWidgetValidator{}), nil)
_, err := srv.Notify(context.Background(), &telegramv1.NotifyRequest{
ExternalId: "not-a-number", Kind: "your_turn", Payload: yourTurnPayload("g"), Language: "en",
})
if status.Code(err) != codes.InvalidArgument {
t.Errorf("err code = %v, want InvalidArgument", status.Code(err))
}
}
func TestSendToUser(t *testing.T) {
sender := &fakeSender{}
srv := NewServer(botRT(sender, 0, stubValidator{}, stubWidgetValidator{}), nil)
resp, err := srv.SendToUser(context.Background(), &telegramv1.SendToUserRequest{ExternalId: "999", Text: "hi"})
if err != nil {
t.Fatalf("send to user: %v", err)
}
if !resp.GetDelivered() || len(sender.text) != 1 || sender.text[0].chatID != 999 || sender.text[0].text != "hi" {
t.Errorf("send to user = %v / calls %+v", resp.GetDelivered(), sender.text)
}
}
func TestSendToGameChannel(t *testing.T) {
t.Run("unconfigured", func(t *testing.T) {
srv := NewServer(botRT(&fakeSender{}, 0, stubValidator{}, stubWidgetValidator{}), nil)
_, err := srv.SendToGameChannel(context.Background(), &telegramv1.SendToGameChannelRequest{Text: "x"})
if status.Code(err) != codes.FailedPrecondition {
t.Errorf("err code = %v, want FailedPrecondition", status.Code(err))
}
})
t.Run("configured", func(t *testing.T) {
sender := &fakeSender{}
srv := NewServer(botRT(sender, 555, stubValidator{}, stubWidgetValidator{}), nil)
resp, err := srv.SendToGameChannel(context.Background(), &telegramv1.SendToGameChannelRequest{Text: "news"})
if err != nil {
t.Fatalf("send to channel: %v", err)
}
if !resp.GetDelivered() || len(sender.text) != 1 || sender.text[0].chatID != 555 {
t.Errorf("send to channel: %+v", sender.text)
}
})
}
@@ -0,0 +1,61 @@
// Package validator implements the home-side Telegram validator gRPC service: it
// verifies Mini App initData and Login Widget data with the bot token's HMAC and
// never calls the Bot API. The gateway calls it during the auth.telegram and
// link.telegram edge operations. It holds the token only as the HMAC secret, so it
// can run on the main host with no VPN and no Telegram egress (ARCHITECTURE.md §12).
package validator
import (
"context"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
telegramv1 "scrabble/pkg/proto/telegram/v1"
"scrabble/platform/telegram/internal/initdata"
"scrabble/platform/telegram/internal/loginwidget"
)
// Server implements the validation subset of telegramv1.TelegramServer; the
// delivery methods (Notify, SendToUser, SendToGameChannel) are intentionally
// unimplemented here — those run on the remote bot over the bot-link.
type Server struct {
telegramv1.UnimplementedTelegramServer
initValidator initdata.Validator
widgetValidator loginwidget.Validator
}
// NewServer builds the validator from the two HMAC validators bound to the token.
func NewServer(iv initdata.Validator, wv loginwidget.Validator) *Server {
return &Server{initValidator: iv, widgetValidator: wv}
}
// ValidateInitData verifies Mini App launch data against the bot's token and
// returns the user identity.
func (s *Server) ValidateInitData(_ context.Context, req *telegramv1.ValidateInitDataRequest) (*telegramv1.ValidateInitDataResponse, error) {
u, err := s.initValidator.Validate(req.GetInitData())
if err != nil {
return nil, status.Error(codes.InvalidArgument, err.Error())
}
return &telegramv1.ValidateInitDataResponse{
ExternalId: u.ExternalID,
Username: u.Username,
FirstName: u.FirstName,
LanguageCode: u.LanguageCode,
}, nil
}
// ValidateLoginWidget verifies Login Widget authorization data against the bot's
// token and returns the user identity, for attaching a Telegram identity to an
// existing account.
func (s *Server) ValidateLoginWidget(_ context.Context, req *telegramv1.ValidateLoginWidgetRequest) (*telegramv1.ValidateLoginWidgetResponse, error) {
u, err := s.widgetValidator.Validate(req.GetData())
if err != nil {
return nil, status.Error(codes.InvalidArgument, err.Error())
}
return &telegramv1.ValidateLoginWidgetResponse{
ExternalId: u.ExternalID,
Username: u.Username,
FirstName: u.FirstName,
}, nil
}
@@ -0,0 +1,63 @@
package validator
import (
"context"
"testing"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
telegramv1 "scrabble/pkg/proto/telegram/v1"
"scrabble/platform/telegram/internal/initdata"
"scrabble/platform/telegram/internal/loginwidget"
)
// stubValidator returns a fixed user / error from Validate.
type stubValidator struct {
user initdata.User
err error
}
func (s stubValidator) Validate(string) (initdata.User, error) { return s.user, s.err }
// stubWidgetValidator returns a fixed user / error from the Login Widget Validate.
type stubWidgetValidator struct {
user loginwidget.User
err error
}
func (s stubWidgetValidator) Validate(string) (loginwidget.User, error) { return s.user, s.err }
func TestValidateInitData(t *testing.T) {
want := initdata.User{ExternalID: "42", Username: "neo", FirstName: "Thomas", LanguageCode: "en-GB"}
srv := NewServer(stubValidator{user: want}, stubWidgetValidator{})
resp, err := srv.ValidateInitData(context.Background(), &telegramv1.ValidateInitDataRequest{InitData: "x"})
if err != nil {
t.Fatalf("validate: %v", err)
}
if resp.GetExternalId() != "42" || resp.GetUsername() != "neo" || resp.GetFirstName() != "Thomas" || resp.GetLanguageCode() != "en-GB" {
t.Errorf("resp = %+v, want %+v", resp, want)
}
bad := NewServer(stubValidator{err: initdata.ErrInvalidInitData}, stubWidgetValidator{})
if _, err := bad.ValidateInitData(context.Background(), &telegramv1.ValidateInitDataRequest{}); status.Code(err) != codes.InvalidArgument {
t.Errorf("err code = %v, want InvalidArgument", status.Code(err))
}
}
func TestValidateLoginWidget(t *testing.T) {
want := loginwidget.User{ExternalID: "42", Username: "neo", FirstName: "Thomas"}
srv := NewServer(stubValidator{}, stubWidgetValidator{user: want})
resp, err := srv.ValidateLoginWidget(context.Background(), &telegramv1.ValidateLoginWidgetRequest{Data: "x"})
if err != nil {
t.Fatalf("validate: %v", err)
}
if resp.GetExternalId() != "42" || resp.GetUsername() != "neo" || resp.GetFirstName() != "Thomas" {
t.Errorf("resp = %+v, want %+v", resp, want)
}
bad := NewServer(stubValidator{}, stubWidgetValidator{err: loginwidget.ErrInvalidLoginWidget})
if _, err := bad.ValidateLoginWidget(context.Background(), &telegramv1.ValidateLoginWidgetRequest{}); status.Code(err) != codes.InvalidArgument {
t.Errorf("err code = %v, want InvalidArgument", status.Code(err))
}
}