final class Constants
{
    const ACTING = 'linepay';
    const ACTING_FLAG = 'acting_linepay';
    const PAYMENT_NAME = 'LINE Pay';
    const ALLOWED_CURRENCIES = ['USD', 'JPY', 'TWD', 'THB'];
    const SANDBOX_API = 'https://sandbox-api-pay.line.me';
    const LIVE_API = 'https://api-pay.line.me';
    const API_VERSION_ROUTE = '/v3/payments';
    const REACT_DOM_NODE = 'linepay_app';
    const SCRIPTS_GLOBAL_VAR_NAME = 'wcexalp';
    const NONCE_KEY = 'wcex_linepay_nonce_key';
    const NONCE_NAME = 'wcex_linepay_nonce';

    /**
     * Prevents instantiation of this class.
     *
     * @throws Exception // thrown if instantiation is attempted.
     */
    private function __construct() {
        throw new Exception("Can't create instance of this class");
    }
}