public function getDisplayText() {
        $text = '';
        switch ($this->state) {
            case self::AUTHORIZED:
                $text = __('AUTHORIZE', 'usces');
                break;
            case self::CAPTURED:
                $text = __('CAPTURE', 'usces');
                break;
            case self::CANCELED:
                $text = __('Canceled', 'wcex_linepay');
                break;
            case self::REFUNDED:
                $text = __('REFUNDED', 'usces');
                break;
            case self::EXPIRED:
                $text = __('Expired', 'wcex_linepay');
                break;
        }

        return $text;
    }