/**
 * Presence Heartbeat System
 *
 * Auto-remove inactive users from presence channels
 */
export declare interface HeartbeatConfig {
  enabled?: boolean
  interval?: number
  timeout?: number
  requireClientHeartbeat?: boolean
}
export declare interface PresenceUser {
  socketId: string
  lastSeen: number
  data: unknown
}
export declare class PresenceHeartbeatManager {
  constructor(config?: HeartbeatConfig);
  start(): void;
  stop(): void;
  onUserRemove(callback: (channel: string, socketId: string, user: unknown) => void): void;
  heartbeat(channel: string, socketId: string, data?: unknown): void;
  remove(channel: string, socketId: string): void;
  getActiveUsers(channel: string): PresenceUser[];
  isActive(channel: string, socketId: string): boolean;
  getStats(): { channels: number, totalUsers: number };
}