import { Config } from '../../../types';
/**
 * Abstract class for websocket api
 *
 * @param T: ws send request type
 * @param U: raw ws response type
 */
export declare abstract class WebsocketInsiderBase<T, U> {
    private readonly config;
    private ws;
    protected constructor(config: Config);
    abstract handleMessage(response: U): void;
    abstract onDestroy(): void;
    send(request: T): void;
    destroy(): void;
    private init;
    private makeRequestUrl;
}