jy-sdk/ThinkPHP/Library/Org/Kudian/Config.class.php

<?php
namespace Org\Kudian;

class Config
{
    private static $params = [
        'base_url' => 'https://pay.kudianvip.com',
        'mch_id' => 'KP10009694',
        'secret_key' => 'q5zZyyA071zS0SZR6xcz0gP0fFhtojqq',
    ];

    public static function get($key, $default = null)
    {
        return self::$params[$key] ?? $default;
    }
}