import { type ServerAdapter } from '../server.js';
import * as ws from 'ws';
import type { SocketAdapter } from '@akala/core';
import { Payload } from '../shared-connection.js';
import { Readable } from 'stream';
export declare class Adapter implements ServerAdapter {
    private options?;
    server?: ws.WebSocketServer;
    closed: Promise<void>;
    close(): Promise<void>;
    onConnection(handler: (socket: SocketAdapter<Payload<Readable>>) => void): void;
    once(event: 'listening', callback: () => void): void;
    start(): void;
    /**
     *
     */
    constructor(options?: ws.ServerOptions);
}