module shoppingCart{
    struct Product{
        long productId;
        string productName;
        double productPrice;
        long productQuanity;
    };

    struct ProductOrder {
        long productOrderId;
        Product product;
        long productOrderQuanity;
    };

    typedef Product ListOfProducts[4];
    typedef ProductOrder Orders[10];
    struct Cart {
     Orders orders;
    };
    interface CartManager {
        Orders showCart();
        boolean addToCart(in ProductOrder productOrder);
        boolean removeFromCart(in ProductOrder productOrder);
        boolean checkOutCart();
    };

    interface Shop {
        ListOfProducts showAvailableProducts();
        string createNewCart();
    };

};