import { EventEmitter } from "stream";
type WebSocketTopics = "authorize" | "subscribe" | "unsubscribe" | "connected" | "authorized" | "object-cov" | "resource-cov" | "service-status" | "broadcast-command" | "error" | "ping" | "pong";
interface EngineWebSocketInterface {
    registerCallback: (topic: WebSocketTopics, callback: Function) => void;
    clearAllCallbacks: () => void;
    subscribeToObjectCOV: (uri: string) => void;
    unsubscribeToObjectCOV: (uri: string) => void;
    subscribeToResourceCOV: (uri: string) => void;
    unsubscribeToResourceCOV: (uri: string) => void;
    subscribeToBCMD: (uri: string) => void;
    unsubscribeToBCMD: (uri: string) => void;
    killWebSocket: () => void;
    disconnectFromWebSocket: () => void;
    connectToWebSocket: (token: string) => void;
}
export declare class EngineWebSocket extends EventEmitter implements EngineWebSocketInterface {
    private webSocket;
    private pendingWebSocketMessages;
    private pendingWebSocketMessageInterval;
    private pingInterval;
    private registeredCallbacks;
    private reconnectInterval;
    private attemptReconnect;
    private authToken;
    private hostname;
    private protocol;
    constructor(hostname: string, protocol: "http" | "https");
    connectToWebSocket: (token: string) => void;
    private sendWebSocketMessage;
    private sendPingMessage;
    registerCallback: (topic: WebSocketTopics, callback: Function) => void;
    clearAllCallbacks: () => void;
    private handleWebSocketMessage;
    private reconnect;
    killWebSocket: () => void;
    disconnectFromWebSocket: () => void;
    subscribeToObjectCOV: (uri: string) => void;
    unsubscribeToObjectCOV: (uri: string) => void;
    subscribeToResourceCOV: (uri: string) => void;
    unsubscribeToResourceCOV: (uri: string) => void;
    subscribeToBCMD: (uri: string) => void;
    unsubscribeToBCMD: (uri: string) => void;
}
export {};