import { createServer } from "node:http" ;
import type { IncomingMessage } from "node:http" ;
import net from "node:net" ;
import * as grammy from "grammy" ;
import { safeEqualSecret } from "openclaw/plugin-sdk/browser-security-runtime" ;
import type { OpenClawConfig } from "openclaw/plugin-sdk/config-runtime" ;
import { isDiagnosticsEnabled } from "openclaw/plugin-sdk/diagnostic-runtime" ;
import type { RuntimeEnv } from "openclaw/plugin-sdk/runtime-env" ;
import { defaultRuntime } from "openclaw/plugin-sdk/runtime-env" ;
import { formatErrorMessage } from "openclaw/plugin-sdk/ssrf-runtime" ;
import {
logWebhookError,
logWebhookProcessed,
logWebhookReceived,
normalizeOptionalString,
startDiagnosticHeartbeat,
stopDiagnosticHeartbeat,
} from "openclaw/plugin-sdk/text-runtime" ;
import {
applyBasicWebhookRequestGuards,
createFixedWindowRateLimiter,
WEBHOOK_RATE_LIMIT_DEFAULTS,
} from "openclaw/plugin-sdk/webhook-ingress" ;
import { readJsonBodyWithLimit } from "openclaw/plugin-sdk/webhook-request-guards" ;
import { resolveTelegramAllowedUpdates } from "./allowed-updates.js" ;
import { withTelegramApiErrorLogging } from "./api-logging.js" ;
import { createTelegramBot } from "./bot.js" ;
const TELEGRAM_WEBHOOK_MAX_BODY_BYTES = 1024 * 1024 ;
const TELEGRAM_WEBHOOK_BODY_TIMEOUT_MS = 30 _000 ;
// Keep below Telegram/proxy read timeouts; grammY returns early while the handler continues.
const TELEGRAM_WEBHOOK_CALLBACK_TIMEOUT_MS = 5 _000 ;
const InputFileCtor: typeof grammy.InputFile =
typeof grammy.InputFile === "function"
? grammy.InputFile
: (class InputFileFallback {
constructor(public readonly path: string) {}
} as unknown as typeof grammy.InputFile);
async function listenHttpServer(params: {
server: ReturnType<typeof createServer>;
port: number;
host: string;
}) {
await new Promise<void >((resolve, reject) => {
const onError = (err: Error) => {
params.server.off("error" , onError);
reject(err);
};
params.server.once("error" , onError);
params.server.listen(params.port, params.host, () => {
params.server.off("error" , onError);
resolve();
});
});
}
function resolveWebhookPublicUrl(params: {
configuredPublicUrl?: string;
server: ReturnType<typeof createServer>;
path: string;
host: string;
port: number;
}) {
if (params.configuredPublicUrl) {
return params.configuredPublicUrl;
}
const address = params.server.address();
if (address && typeof address !== "string" ) {
const resolvedHost =
params.host === "0.0.0.0" || address.address === "0.0.0.0" || address.address === "::"
? "localhost"
: address.address;
return `http://${resolvedHost}:${address.port}${params.path}`;
}
const fallbackHost = params.host === "0.0.0.0" ? "localhost" : params.host;
return `http://${fallbackHost}:${params.port}${params.path}`;
}
async function initializeTelegramWebhookBot(params: {
bot: ReturnType<typeof createTelegramBot>;
runtime: RuntimeEnv;
abortSignal?: AbortSignal;
}) {
const initSignal = params.abortSignal as Parameters<(typeof params.bot)["init" ]>[0 ];
await withTelegramApiErrorLogging({
operation: "getMe" ,
runtime: params.runtime,
fn: () => params.bot.init(initSignal),
});
}
function resolveSingleHeaderValue(header: string | string[] | undefined): string | undefined {
if (typeof header === "string" ) {
return header;
}
if (Array.isArray(header) && header.length === 1 ) {
return header[0 ];
}
return undefined;
}
function hasValidTelegramWebhookSecret(
secretHeader: string | undefined,
expectedSecret: string,
): boolean {
return safeEqualSecret(secretHeader, expectedSecret);
}
function parseIpLiteral(value: string | undefined): string | undefined {
const trimmed = normalizeOptionalString(value);
if (!trimmed) {
return undefined;
}
if (trimmed.startsWith("[" )) {
const end = trimmed.indexOf("]" );
if (end !== -1 ) {
const candidate = trimmed.slice(1 , end);
return net.isIP(candidate) === 0 ? undefined : candidate;
}
}
if (net.isIP(trimmed) !== 0 ) {
return trimmed;
}
const lastColon = trimmed.lastIndexOf(":" );
if (lastColon > -1 && trimmed.includes("." ) && trimmed.indexOf(":" ) === lastColon) {
const candidate = trimmed.slice(0 , lastColon);
return net.isIP(candidate) === 4 ? candidate : undefined;
}
return undefined;
}
function isTrustedProxyAddress(
ip: string | undefined,
trustedProxies?: readonly string[],
): boolean {
const candidate = parseIpLiteral(ip);
if (!candidate || !trustedProxies?.length) {
return false ;
}
const blockList = new net.BlockList();
for (const proxy of trustedProxies) {
const trimmed = normalizeOptionalString(proxy) ?? "" ;
if (!trimmed) {
continue ;
}
if (trimmed.includes("/" )) {
const [address, prefix] = trimmed.split("/" , 2 );
const parsedPrefix = Number.parseInt(prefix ?? "" , 10 );
const family = net.isIP(address);
if (
family === 4 &&
Number.isInteger(parsedPrefix) &&
parsedPrefix >= 0 &&
parsedPrefix <= 32
) {
blockList.addSubnet(address, parsedPrefix, "ipv4" );
}
if (
family === 6 &&
Number.isInteger(parsedPrefix) &&
parsedPrefix >= 0 &&
parsedPrefix <= 128
) {
blockList.addSubnet(address, parsedPrefix, "ipv6" );
}
continue ;
}
if (net.isIP(trimmed) === 4 ) {
blockList.addAddress(trimmed, "ipv4" );
continue ;
}
if (net.isIP(trimmed) === 6 ) {
blockList.addAddress(trimmed, "ipv6" );
}
}
return blockList.check(candidate, net.isIP(candidate) === 6 ? "ipv6" : "ipv4" );
}
function resolveForwardedClientIp(
forwardedFor: string | undefined,
trustedProxies?: readonly string[],
): string | undefined {
if (!trustedProxies?.length) {
return undefined;
}
const forwardedChain = forwardedFor
?.split("," )
.map((entry) => parseIpLiteral(entry))
.filter((entry): entry is string => Boolean (entry));
if (!forwardedChain?.length) {
return undefined;
}
for (let index = forwardedChain.length - 1 ; index >= 0 ; index -= 1 ) {
const hop = forwardedChain[index];
if (!isTrustedProxyAddress(hop, trustedProxies)) {
return hop;
}
}
return undefined;
}
function resolveTelegramWebhookClientIp(req: IncomingMessage, config?: OpenClawConfig): string {
const remoteAddress = parseIpLiteral(req.socket.remoteAddress);
const trustedProxies = config?.gateway?.trustedProxies;
if (!remoteAddress) {
return "unknown" ;
}
if (!isTrustedProxyAddress(remoteAddress, trustedProxies)) {
return remoteAddress;
}
const forwardedFor = Array.isArray(req.headers["x-forwarded-for" ])
? req.headers["x-forwarded-for" ][0 ]
: req.headers["x-forwarded-for" ];
const forwardedClientIp = resolveForwardedClientIp(forwardedFor, trustedProxies);
if (forwardedClientIp) {
return forwardedClientIp;
}
if (config?.gateway?.allowRealIpFallback === true ) {
const realIp = Array.isArray(req.headers["x-real-ip" ])
? req.headers["x-real-ip" ][0 ]
: req.headers["x-real-ip" ];
return parseIpLiteral(realIp) ?? "unknown" ;
}
return "unknown" ;
}
function resolveTelegramWebhookRateLimitKey(
req: IncomingMessage,
path: string,
config?: OpenClawConfig,
): string {
return `${path}:${resolveTelegramWebhookClientIp(req, config)}`;
}
export async function startTelegramWebhook(opts: {
token: string;
accountId?: string;
config?: OpenClawConfig;
path?: string;
port?: number;
host?: string;
secret?: string;
runtime?: RuntimeEnv;
fetch?: typeof fetch;
abortSignal?: AbortSignal;
healthPath?: string;
publicUrl?: string;
webhookCertPath?: string;
}) {
const path = opts.path ?? "/telegram-webhook" ;
const healthPath = opts.healthPath ?? "/healthz" ;
const port = opts.port ?? 8787 ;
const host = opts.host ?? "127.0.0.1" ;
const secret = normalizeOptionalString(opts.secret) ?? "" ;
if (!secret) {
throw new Error(
"Telegram webhook mode requires a non-empty secret token. " +
"Set channels.telegram.webhookSecret in your config." ,
);
}
const runtime = opts.runtime ?? defaultRuntime;
const diagnosticsEnabled = isDiagnosticsEnabled(opts.config);
const bot = createTelegramBot({
token: opts.token,
runtime,
proxyFetch: opts.fetch,
config: opts.config,
accountId: opts.accountId,
});
await initializeTelegramWebhookBot({
bot,
runtime,
abortSignal: opts.abortSignal,
});
const telegramWebhookRateLimiter = createFixedWindowRateLimiter({
windowMs: WEBHOOK_RATE_LIMIT_DEFAULTS.windowMs,
maxRequests: WEBHOOK_RATE_LIMIT_DEFAULTS.maxRequests,
maxTrackedKeys: WEBHOOK_RATE_LIMIT_DEFAULTS.maxTrackedKeys,
});
const handler = grammy.webhookCallback(bot, "callback" , {
secretToken: secret,
onTimeout: "return" ,
timeoutMilliseconds: TELEGRAM_WEBHOOK_CALLBACK_TIMEOUT_MS,
});
if (diagnosticsEnabled) {
startDiagnosticHeartbeat(opts.config);
}
const server = createServer((req, res) => {
const respondText = (statusCode: number, text = "" ) => {
if (res.headersSent || res.writableEnded) {
return ;
}
res.writeHead(statusCode, { "Content-Type" : "text/plain; charset=utf-8" });
res.end(text);
};
if (req.url === healthPath) {
res.writeHead(200 );
res.end("ok" );
return ;
}
if (req.url !== path || req.method !== "POST" ) {
res.writeHead(404 );
res.end();
return ;
}
// Apply the per-source limit before auth so invalid secret guesses consume budget
// in the same window as any later request from that source.
if (
!applyBasicWebhookRequestGuards({
req,
res,
rateLimiter: telegramWebhookRateLimiter,
rateLimitKey: resolveTelegramWebhookRateLimitKey(req, path, opts.config),
})
) {
return ;
}
const startTime = Date.now();
if (diagnosticsEnabled) {
logWebhookReceived({ channel: "telegram" , updateType: "telegram-post" });
}
const secretHeader = resolveSingleHeaderValue(req.headers["x-telegram-bot-api-secret-token" ]);
if (!hasValidTelegramWebhookSecret(secretHeader, secret)) {
res.shouldKeepAlive = false ;
res.setHeader("Connection" , "close" );
respondText(401 , "unauthorized" );
return ;
}
void (async () => {
const body = await readJsonBodyWithLimit(req, {
maxBytes: TELEGRAM_WEBHOOK_MAX_BODY_BYTES,
timeoutMs: TELEGRAM_WEBHOOK_BODY_TIMEOUT_MS,
emptyObjectOnEmpty: false ,
});
if (!body.ok) {
if (body.code === "PAYLOAD_TOO_LARGE" ) {
respondText(413 , body.error);
return ;
}
if (body.code === "REQUEST_BODY_TIMEOUT" ) {
respondText(408 , body.error);
return ;
}
if (body.code === "CONNECTION_CLOSED" ) {
respondText(400 , body.error);
return ;
}
respondText(400 , body.error);
return ;
}
let replied = false ;
const reply = async (json: string) => {
if (replied) {
return ;
}
replied = true ;
if (res.headersSent || res.writableEnded) {
return ;
}
res.writeHead(200 , { "Content-Type" : "application/json; charset=utf-8" });
res.end(json);
};
const unauthorized = async () => {
if (replied) {
return ;
}
replied = true ;
respondText(401 , "unauthorized" );
};
await handler(body.value, reply, secretHeader, unauthorized);
if (!replied) {
respondText(200 );
}
if (diagnosticsEnabled) {
logWebhookProcessed({
channel: "telegram" ,
updateType: "telegram-post" ,
durationMs: Date.now() - startTime,
});
}
})().catch ((err) => {
const errMsg = formatErrorMessage(err);
if (diagnosticsEnabled) {
logWebhookError({
channel: "telegram" ,
updateType: "telegram-post" ,
error: errMsg,
});
}
runtime.log?.(`webhook handler failed: ${errMsg}`);
respondText(500 );
});
});
await listenHttpServer({
server,
port,
host,
});
const boundAddress = server.address();
const boundPort = boundAddress && typeof boundAddress !== "string" ? boundAddress.port : port;
const publicUrl = resolveWebhookPublicUrl({
configuredPublicUrl: opts.publicUrl,
server,
path,
host,
port,
});
try {
await withTelegramApiErrorLogging({
operation: "setWebhook" ,
runtime,
fn: () =>
bot.api.setWebhook(publicUrl, {
secret_token: secret,
allowed_updates: resolveTelegramAllowedUpdates(),
certificate: opts.webhookCertPath ? new InputFileCtor(opts.webhookCertPath) : undefined,
}),
});
} catch (err) {
server.close();
void bot.stop();
if (diagnosticsEnabled) {
stopDiagnosticHeartbeat();
}
throw err;
}
runtime.log?.(`webhook local listener on http://${host}:${boundPort}${path}`);
runtime.log?.(`webhook advertised to telegram on ${publicUrl}`);
let shutDown = false ;
const shutdown = () => {
if (shutDown) {
return ;
}
shutDown = true ;
void withTelegramApiErrorLogging({
operation: "deleteWebhook" ,
runtime,
fn: () => bot.api.deleteWebhook({ drop_pending_updates: false }),
}).catch (() => {
// withTelegramApiErrorLogging has already emitted the failure.
});
server.close();
void bot.stop();
if (diagnosticsEnabled) {
stopDiagnosticHeartbeat();
}
};
if (opts.abortSignal) {
opts.abortSignal.addEventListener("abort" , shutdown, { once: true });
}
return { server, bot, stop: shutdown };
}
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