import { MTProtoSender } from "./MTProtoSender";
import type { TelegramBaseClient } from "../client/telegramBaseClient";
export interface ApiSenderPoolOptions {
    /**
     * Disconnect an idle borrowed sender after this many ms of inactivity.
     * The next {@link ApiSenderPool.borrow} call will lazily reconnect.
     */
    idleTimeoutMs: number;
}
/**
 * One borrowed MTProtoSender per non-main DC for arbitrary API calls
 * (everything except file transfer, which uses {@link FilePool}).
 *
 * Slots are lazily connected on first borrow. A broken auth key on a
 * non-main DC purges the session's stored key for that DC and the slot
 * is discarded; the next borrow rebuilds it.
 */
export declare class ApiSenderPool {
    private readonly _slots;
    private readonly _client;
    private readonly _idleTimeoutMs;
    private _closed;
    constructor(client: TelegramBaseClient, opts: ApiSenderPoolOptions);
    borrow(dcId: number): Promise<MTProtoSender>;
    has(dcId: number): boolean;
    private _createSlot;
    private _onSenderBreak;
    purge(dcId?: number): Promise<void>;
    close(): Promise<void>;
}