import { SocketError } from './error-handling';
import { Event, EventMessage } from '../interfaces';
export declare class SocketClient {
    private wsUrl;
    private onError;
    private socket;
    private startAttempt;
    private shouldDisconnect;
    private callbackList;
    private callbackListAll;
    constructor(wsUrl: string, onError: (error: SocketError) => void);
    private backOff;
    connect(): Promise<void>;
    disconnect(): void;
    private broadcast;
    on<T>(event: Event | '*', cb: (data: EventMessage<T>) => void): void;
    off<T>(event: Event | '*', cb: (data: EventMessage<T>) => void): void;
}