dispatcherAttempts?: TelegramDispatcherAttempt[];

/**

* Promote this transport to its next fallback dispatcher before the next

* request. Returns false when no fallback path exists.

* request. The original error, when available, is retained in diagnostics.

* Returns false when no fallback path exists.

*/

forceFallback?: (reason: string) => boolean;

forceFallback?: (reason: string, err?: unknown) => boolean;

/**

* Release all dispatchers owned by this transport and the TCP sockets they

* hold. Safe to call multiple times; subsequent calls resolve immediately.

},

exportAttempt: { dispatcherPolicy: fallbackIpPolicy },

logLevel: "warn",

logMessage: "fetch fallback: DNS-resolved IP unreachable; trying alternative Telegram API IP",

logMessage:

"fetch fallback: primary connection path failed; trying alternative Telegram API IP",

});

return attempts;

fetch: resolvedFetch,

sourceFetch,

dispatcherAttempts: transportAttempts.map((attempt) => attempt.exportAttempt),

forceFallback: (reason: string) =>

promoteStickyAttempt(stickyAttemptIndex + 1, new Error("forced fallback"), reason),

forceFallback: (reason: string, err?: unknown) =>

promoteStickyAttempt(stickyAttemptIndex + 1, err ?? new Error("forced fallback"), reason),

close,

};

}