import type { Request, RequestHandler, Response } from 'express';
/**
 * A middleware to return 401 for deleted devices and avoid doing any additional work.
 * This shares the deleted device cache with device-state
 */
export declare const denyDeletedDevices: RequestHandler;
export declare const authDevice: (req: Request, res: Response) => Promise<void>;
export declare const clientConnect: (req: Request, res: Response) => Promise<void>;
export declare const clientDisconnect: (req: Request, res: Response) => Promise<void>;