import { Channel, PresenceChannel } from "pusher-js";
/**
 * Subscribes to a channel event and registers a callback.
 * @param channel Pusher channel to bind to
 * @param eventName Name of event to bind to
 * @param callback Callback to call on a new event
 */
export declare function useEvent<D>(channel: Channel | PresenceChannel | undefined, eventName: string, callback: (data?: D, metadata?: {
    user_id: string;
}) => void): void;