/**
 * Keep-alive watchdog for the WebSocket connection: pings the server on an
 * interval and reconnects when a ping stays unanswered.
 *
 * @module
 */
/// <amd-module name="file:///home/runner/work/hyperliquid/hyperliquid/src/transport/websocket/_keepAlive.ts" />
import type { ReconnectingWebSocket } from "@nktkas/rews";
import type { HyperliquidEventTarget } from "./_events.js";
/** Configuration options for the keep-alive watchdog. */
export interface WebSocketKeepAliveOptions {
    /**
     * Interval between pings in ms.
     *
     * The server closes a connection that has been silent for ~60 s, so pings must come more often than that.
     *
     * Default: `30_000`
     */
    interval?: number;
    /**
     * Time to wait for a pong before forcing a reconnect, in ms.
     *
     * Default: `10_000`
     */
    timeout?: number;
}
/** Pings the server while the connection is open and reconnects when a ping stays unanswered. */
export declare class WebSocketKeepAlive {
    private readonly _socket;
    private readonly _interval;
    private readonly _timeout;
    private _pingInterval;
    private _pongTimeout;
    constructor(socket: ReconnectingWebSocket, hlEvents: HyperliquidEventTarget, options?: WebSocketKeepAliveOptions);
    private _start;
    private _stop;
    private _disarm;
}