Marketplace.cpp

void Marketplace::buy(account_name buyer, uint64_t productId) {
    productIndex products(_self, _self);

    auto iterator = products.find(productId);
    eosio_assert(iterator != products.end(), "The product not found");

    auto product = products.get(productId);
    eosio_assert(product.quantity > 0, "The product is out of stock");

    asset productPrice = asset(product.price, string_to_symbol(4, "OAS"));

    action(vector<permission_level>(), N(anorak), N(transfer), make_tuple(buyer, _self, productPrice, string(""))).send();

    action(vector<permission_level>(), N(market), N(additem), make_tuple(buyer, 
        product.product_id,
        product.name,
        product.power,
        product.health,
        product.ability,
        product.level_up
    )).send();

    update(buyer, product.product_id, -1);
}

void Marketplace::getbyid(uint64_t productId) {
    productIndex products(_self, _self);

    auto iterator = products.find(productId);
    eosio_assert(iterator != products.end(), "Product not found");

    auto product = products.get(productId);
    print("Id: ", product.product_id);
    print(" | Name: ", product.name.c_str());
    print(" | Power: ", product.power);
    print(" | Health: ", product.health);
    print(" | Ability: ", product.ability.c_str());
    print(" | Level up: ", product.level_up);
    print(" | Quantity: ", product.quantity); 
    print(" | Price: ", product.price);
}
    
void Marketplace::add(account_name account, product newProduct) {
    require_auth(account);

    productIndex products(_self, _self);

    auto iterator = products.find(newProduct.product_id);
    eosio_assert(iterator == products.end(), "Product for this ID already exists");

    products.emplace(account, [&](auto& product) {
        product.product_id = newProduct.product_id;
        product.name = newProduct.name;
        product.power = newProduct.power;
        product.health = newProduct.health;
        product.ability = newProduct.ability;
        product.level_up = newProduct.level_up;
        product.quantity = newProduct.quantity;
        product.price = newProduct.price;
    });
}

    void Marketplace::update(account_name account, uint64_t product_id, uint64_t quantity) {
        require_auth(account);

        productIndex products(_self, _self);

        auto iterator = products.find(product_id);
        eosio_assert(iterator != products.end(), "Product not found");

        products.modify(iterator, account, [&](auto& product) {
            product.quantity += quantity;
        });
    }

    void Marketplace::remove(account_name account, uint64_t productId) {
        require_auth(account);

        productIndex products(_self, _self);

        auto iterator = products.find(productId);
        eosio_assert(iterator != products.end(), "Product not found");

        products.erase(iterator); 
    }