import { ClientOption } from '../../model/client_option';
export type UtaWsPrimitive = string | number | boolean | null;
export type UtaWsValue = UtaWsPrimitive | UtaWsValue[] | {
    [key: string]: UtaWsValue;
};
export interface UtaPushEvent<T = Record<string, UtaWsValue>> {
    T: string;
    P?: string | number;
    t?: string;
    d: T;
}
export type UtaPushCallback<T = Record<string, UtaWsValue>> = (event: UtaPushEvent<T>) => void | Promise<void>;
export type UtaPushTradeType = 'SPOT' | 'FUTURES';
export interface UtaPushSubscription {
    channel: string;
    callback: UtaPushCallback;
    symbols?: string[];
    symbol?: string;
    tradeType?: string;
    accountType?: string;
    parameters?: Record<string, UtaWsValue>;
}
/**
 * WebSocket transport for the direct UTA public and private push protocols.
 *
 * The UTA endpoints do not use the legacy token handshake, so this intentionally has a separate
 * implementation from DefaultWsService.
 */
export declare class UtaPushWsService {
    private readonly option;
    private readonly privateChannel;
    private readonly endpoint;
    private readonly tradeType?;
    private readonly signer?;
    private socket?;
    private started;
    private connected;
    private reconnectAttempts;
    private reconnectTimer?;
    private pingTimer?;
    private pongTimer?;
    private pendingPingId?;
    private pingInterval;
    private pingTimeout;
    private pendingAcks;
    private subscriptions;
    static public(option: ClientOption, tradeType: UtaPushTradeType): UtaPushWsService;
    static private(option: ClientOption): UtaPushWsService;
    private constructor();
    start(): Promise<void>;
    stop(): Promise<void>;
    subscribe(subscription: UtaPushSubscription): Promise<string>;
    unsubscribe(id: string): Promise<void>;
    private dial;
    private afterWelcome;
    private authenticate;
    private sendSubscription;
    private sendAndAwaitAck;
    private handleMessage;
    private dispatch;
    private matches;
    private schedulePing;
    private handleDisconnect;
    private validateSubscription;
    private parseMessage;
    private isWelcome;
    private isPong;
    private clearTimers;
    private rejectPending;
    private positiveNumber;
    private notify;
    private toError;
}