import { AbortablePromise } from 'better-promises';
import { RequestOptionsNoCapture } from '../../../types.js';
interface OpenSharedOptions extends RequestOptionsNoCapture {
    /**
     * Title to be displayed in the scanner.
     */
    text?: string;
}
/**
 * Closes the scanner.
 * @since Mini Apps v6.4
 * @throws {FunctionNotAvailableError} The environment is unknown
 * @throws {FunctionNotAvailableError} The SDK is not initialized
 * @throws {FunctionNotAvailableError} The function is not supported
 * @example
 * if (close.isAvailable()) {
 *   close();
 * }
 */
export declare const close: import('../../wrappers/wrapSafe.js').SafeWrapped<() => void, true, never>;
/**
 * Signal indicating if the QR Scanner is currently opened.
 */
export declare const isSupported: import('@telegram-apps/signals').Computed<boolean>;
/**
 * Opens the scanner and returns a promise which will be resolved with the QR content if the
 * passed `capture` function returned true.
 *
 * The `capture` option may be ommited. In this case, the first scanned QR will be returned.
 *
 * Promise may also be resolved to undefined if the scanner was closed.
 * @param options - method options.
 * @returns A promise with QR content presented as string or undefined if the
 * scanner was closed.
 * @since Mini Apps v6.4
 * @throws {FunctionNotAvailableError} The environment is unknown
 * @throws {FunctionNotAvailableError} The SDK is not initialized
 * @throws {FunctionNotAvailableError} The function is not supported
 * @throws {ConcurrentCallError} The QR Scanner is already opened
 * @example Without `capture` option
 * if (captureOne.isAvailable()) {
 *   const qr = await captureOne({ text: 'Scan any QR' });
 * }
 * @example Using `capture` option
 * if (captureOne.isAvailable()) {
 *   const qr = await captureOne({
 *     text: 'Scan any QR',
 *     capture(scannedQr) {
 *       return scannedQr === 'any expected by me qr';
 *     }
 *   });
 * }
 */
declare function _open(options?: OpenSharedOptions & {
    /**
     * Function, which should return true if the scanned QR should be captured.
     * @param qr - scanned QR content.
     */
    capture?: (qr: string) => boolean;
}): AbortablePromise<string | undefined>;
/**
 * Opens the scanner and calls the `onCaptured` function each time, a QR was scanned.
 *
 * The function returns a promise which will be resolved when the QR scanner was closed. It expects
 * the scanner to be closed externally by a user or via the `close` method.
 * @param options - method options.
 * @since Mini Apps v6.4
 * @throws {FunctionNotAvailableError} The environment is unknown
 * @throws {FunctionNotAvailableError} The SDK is not initialized
 * @throws {FunctionNotAvailableError} The function is not supported
 * @throws {ConcurrentCallError} The QR Scanner is already opened
 * @example
 * if (captureMany.isAvailable()) {
 *   const promise = await captureMany({
 *     text: 'Scan any QR',
 *     onCaptured(scannedQr) {
 *       if (scannedQr === 'any expected by me qr') {
 *         close();
 *       }
 *     }
 *   });
 *   console.log('The scanner was closed');
 * }
 */
declare function _open(options: OpenSharedOptions & {
    /**
     * Function which will be called if a QR code was scanned.
     * @param qr - scanned QR content.
     */
    onCaptured: (qr: string) => void;
}): AbortablePromise<void>;
export declare const open: import('../../wrappers/wrapSafe.js').SafeWrapped<typeof _open, true, never>;
export declare const openPromise: import('@telegram-apps/signals').Computed<AbortablePromise<void> | undefined>, isOpened: import('@telegram-apps/signals').Computed<boolean>;
export declare const openError: import('@telegram-apps/signals').Computed<Error | undefined>;
export {};