/home/kueuepay/www/vendor/phpseclib/phpseclib/phpseclib/Crypt/Common/PrivateKey.php
<?php

/**
 * PrivateKey interface
 *
 * @author    Jim Wigginton <terrafrost@php.net>
 * @copyright 2009 Jim Wigginton
 * @license   http://www.opensource.org/licenses/mit-license.html  MIT License
 * @link      http://phpseclib.sourceforge.net
 */

namespace phpseclib3\Crypt\Common;

/**
 * PrivateKey interface
 *
 * @author  Jim Wigginton <terrafrost@php.net>
 */
interface PrivateKey
{
    public function sign($message);
    //public function decrypt($ciphertext);
    public function getPublicKey();
    public function toString($type, array $options = []);

    /**
     * @param string|false $password
     * @return mixed
     */
    public function withPassword($password = false);
}
Authentication

Authentication

To access the Kueue Pay Developer API, you’ll need an API key. You can obtain your API key by logging in to your Kueue Pay merchant account and navigating to the API section. Collect Client ID , Secret ID & Merchant ID Carefully. Keep your API key confidential and do not share it publicly.

If you don't have any merchant account please Register to continue