import type { IncomingMessage, Server } from 'node:http';
import type { Duplex } from 'node:stream';
import type { DeviceNotificationTicketStore } from '../api/handlers/DeviceNotificationTicketHandler';
import { DeviceNotificationHub } from '../notifications/DeviceNotificationHub';
export interface DeviceNotificationWebSocketServerOptions {
    hub: DeviceNotificationHub;
    ticketStore: DeviceNotificationTicketStore;
    path?: string;
    heartbeatIntervalMs?: number;
}
export declare class DeviceNotificationWebSocketServer {
    private readonly hub;
    private readonly ticketStore;
    private readonly path;
    private readonly heartbeatIntervalMs;
    private readonly wss;
    private readonly sockets;
    private readonly socketConnections;
    private readonly alive;
    private heartbeatTimer?;
    constructor(options: DeviceNotificationWebSocketServerOptions);
    attach(server: Server): void;
    handleUpgrade(request: IncomingMessage, socket: Duplex, head: Buffer): void;
    stop(): void;
    private handleFrame;
    private reject;
    private startHeartbeat;
    private cleanupSocket;
}