import React from 'react';
export interface QrCodeScannerProps {
    style?: React.CSSProperties;
    dataType?: 'url' | 'text';
    legacyMode?: boolean;
    validate?: (...args: any[]) => boolean;
    onScan: (...args: any[]) => void;
    onError: (err: any, data: any) => void;
    onLoad?: (...args: any[]) => void;
    onImageLoad?: (...args: any[]) => void;
    delay?: number;
    facingMode?: 'user' | 'environment';
    showViewFinder?: boolean;
    className?: string;
    children?: React.ReactNode;
}
/**
 * QRCodeScanner assumes that the data provided inside the QR code image,
 * are a HTTP link, thus it uses the `encodeURI` function to escape
 * all scanned data that will be forwarded to the `onScan` function
 *
 * When a QR code is scanned, before we run the `onScan` callback function,
 * we do the following:
 *
 * 1. Run a validator function provided in the props of QrCodeScanner component
 *    that receives the *raw* scanned data and returns a boolean type. (eg. check
 *    if it's a gov.gr subdomain, or that it matches the current domain)
 * 2. If the validator returns `true`, then construct a URL object from the data provided
 *    and check if the protocol is `https` and the `origin` is the same as the origin of this page
 * 2. Automatically fallback to the `onError` callback function, if the validation or url check fail
 * 3. Finally, run `onScan` callback function with the scanned data encoded as a URI.
 *
 */
export declare const QrCodeScanner: React.FC<QrCodeScannerProps>;
export default QrCodeScanner;