OTPHP\Factory::checkData PHP Method

    private static function checkData(array &$data)
    {
        foreach (['scheme', 'host', 'path', 'query'] as $key) {
            Assertion::keyExists($data, $key, 'Not a valid OTP provisioning URI');
        }
        Assertion::eq('otpauth', $data['scheme'], 'Not a valid OTP provisioning URI');
        parse_str($data['query'], $data['query']);
        Assertion::keyExists($data['query'], 'secret', 'Not a valid OTP provisioning URI');
    }