/// <reference types="node" />
import * as events from 'events';
export interface HealthCheckConfig {
    enabled: boolean;
    pingInterval?: number;
    maxMissedPongs?: number;
}
export interface WebSocketClientOptions {
    url: string;
    apiKey?: string;
    bearerToken?: string;
    sdkToken?: string;
    healthCheck?: HealthCheckConfig;
}
export interface DisconnectReason {
    reason: 'health-check-timeout';
}
export declare class WebSocketClient extends events.EventEmitter {
    protected readonly options: WebSocketClientOptions;
    private socket;
    private consecutiveMisses;
    private lastMessageAt;
    private lastPingAt;
    private pingTimerId;
    private pendingDisconnectReason;
    constructor(options: WebSocketClientOptions);
    /**
     * The endpoint this client connects to, fully resolved — host, version
     * segment, product and `/streaming`.
     *
     * The version segment is chosen by the SDK from the `version` option rather
     * than written by the caller, so this is the only way to see which version a
     * client actually ended up on.
     */
    get url(): string;
    connect(): Promise<unknown>;
    disconnect(): void;
    private detectConnectionStatus;
    subscribe(params: {
        channel: string;
        [key: string]: any;
    }): void;
    unsubscribe(params: {
        id?: string;
        ids?: string[];
    }): void;
    ping(params: {
        state?: any;
    }): void;
    subscriptions(): void;
    private authenticate;
    private send;
    private handleMessage;
}