public function checkDiscountValidity($obj, $discounts, $order_total, $products, $check_cart_discount = false) { global $cookie, $cart; if (!Module::isInstalled('agilemultipleseller')) { return parent::checkDiscountValidity($obj, $discounts, $order_total, $products, $check_cart_discount); } include_once _PS_ROOT_DIR_ . "/modules/agilemultipleseller/agilemultipleseller.php"; if ($valid_err = AgileMultipleSeller::validate_coupon_error($obj)) { return $valid_err; } return parent::checkDiscountValidity($obj, $discounts, $order_total, $products, $check_cart_discount); }