import { AbstractSocketServer, SocketMessage, SocketServerOptions } from "./types";
export declare class SocketServer {
    private readonly server;
    private readonly options;
    private clients;
    private subscriptions;
    private heartbeatIntervalId?;
    constructor(server: AbstractSocketServer, options: SocketServerOptions);
    broadcast(message: SocketMessage): void;
    sendToClient(clientId: string, message: SocketMessage): void;
    subscribe(clientId: string, messageType: string): void;
    unsubscribe(clientId: string, messageType: string): void;
    sendToSubscribers(messageType: string, message: SocketMessage): void;
    private handleMessage;
    private handleDisconnection;
    private generateClientId;
    private startHeartbeat;
    private stopHeartbeat;
    shutdown(): void;
}