import { UsbDevice, Emitter } from '../index.js';
/**
 * USB Options
 */
interface USBOptions {
    /**
     * Optional `device found` callback function to allow the user to select a device
     */
    devicesFound?: (devices: UsbDevice[]) => Promise<UsbDevice | void>;
    /**
     * Optional array of preconfigured allowed devices
     */
    allowedDevices?: USBDeviceFilter[];
    /**
     * Optional flag to automatically allow all devices
     */
    allowAllDevices?: boolean;
    /**
     * Optional timeout (in milliseconds) to use for the device control transfers
     */
    deviceTimeout?: number;
}
/**
 * WebUSB class
 *
 * ### Events
 *
 * | Name | Event | Description |
 * | ---- | ----- | ----------- |
 * | `connect` | {@link USBConnectionEvent} | Device connected |
 * | `disconnect` | {@link USBConnectionEvent} | Device disconnected |
 */
declare class WebUSB extends EventTarget implements USB {
    private options;
    protected nativeEmitter: Emitter;
    protected authorisedDevices: Set<USBDeviceFilter>;
    protected listenerCount: number;
    protected eventListeners: Map<string, Set<EventListener>>;
    protected knownDevices: Map<string, UsbDevice>;
    constructor(options?: USBOptions);
    private deviceConnectCallback;
    private deviceDisconnectCallback;
    addEventListener(type: 'connect' | 'disconnect', listener: (this: this, ev: USBConnectionEvent) => void): void;
    addEventListener(type: 'connect' | 'disconnect', listener: EventListener): void;
    removeEventListener(type: 'connect' | 'disconnect', callback: (this: this, ev: USBConnectionEvent) => void): void;
    removeEventListener(type: 'connect' | 'disconnect', callback: EventListener): void;
    private _onconnect;
    set onconnect(fn: (ev: USBConnectionEvent) => void);
    private _ondisconnect;
    set ondisconnect(fn: (ev: USBConnectionEvent) => void);
    /**
     * Requests a single Web USB device
     * @param options The options to use when scanning
     * @returns Promise containing the selected device
     */
    requestDevice(options?: USBDeviceRequestOptions): Promise<UsbDevice>;
    /**
     * Gets all allowed Web USB devices which are connected
     * @returns Promise containing an array of devices
     */
    getDevices(): Promise<UsbDevice[]>;
    /**
     * Convenience method to get the first device with the specified VID and PID, or `undefined` if no such device is present.
     * @param vid
     * @param pid
     */
    findDeviceByIds(vid: number, pid: number): Promise<UsbDevice | undefined>;
    /**
     * Convenience method to get the device with the specified serial number, or `undefined` if no such device is present.
     * @param serialNumber
     */
    findDeviceBySerial(serialNumber: string): Promise<UsbDevice | undefined>;
    private loadDevices;
    private quickFilter;
    private filterDevice;
    private isAuthorisedDevice;
}
/**
 * Default USB object (allows all devices by default)
 */
declare const usb: WebUSB;
/**
 * Default WebUSB object (mimics navigator.usb)
 */
declare const webusb: WebUSB | USB;
export { usb, webusb, WebUSB, USBOptions, };