有没有去中心化购物合约

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分类：以太坊

默认排序时间排序

1 个回答

jc0803kevin 2020-10-20 15:33

```
pragma solidity >=0.4.22 <0.8.0;

contract Mall{

//商品状态
    enum ProductStatus { Open, Sold, Unsold }

//商品品相
    enum ProductCondition { New, Used }

struct Product {
        //商品基本信息

uint id;//商品编号，全局递增

string name;//商品名称

string category;//商品类别

string imageLink; //商品图片链接地址

string descLink;  //商品描述链接地址

//拍卖相关信息

uint auctionStartTime; //拍卖开始时间

uint auctionEndTime;//拍卖截止时间

uint startPrice; //价格

address highestBidder;   //出最高价者

uint highestBid; //最高出价

uint secondHighestBid;//次高出价

uint totalBids;  //投标者人数

//商品状态
        ProductStatus status; //商品销售状态：拍卖中、售出、未售

ProductCondition condition; //品相：新品、二手

}

//卖家的商品信息
    mapping (address => mapping(uint => Product)) stores;

mapping (uint => address) productIdInStore;

uint private productIndex = 0;

//商品上架
    function addProductToStore(
        string memory _name, string memory _category, string memory _imageLink, string memory _descLink,
        uint _auctionStartTime,uint _auctionEndTime, uint _startPrice, uint _productCondition) public {
        //拍卖截止时间应当晚于开始时间

require (_auctionStartTime < _auctionEndTime, "拍卖截止时间应当晚于开始时间");

//构造Product结构变量
        Product memory product = Product(productIndex, _name, _category, _imageLink,_descLink,
         _auctionStartTime, _auctionEndTime,_startPrice, address(0), 0, 0, 0, ProductStatus.Open,ProductCondition(_productCondition));

//存入商品目录表                   
        stores[msg.sender][productIndex] = product;

//保存商品反查表
        productIdInStore[productIndex] = msg.sender;

//商品编号计数器递增
        productIndex += 1;

}

//查看商品信息
    function getProduct(uint _productId) view public returns (uint, string memory, string memory, string memory, string memory, 
        uint,uint, uint, ProductStatus, ProductCondition) {
        //利用商品编号提取商品信息
        Product memory product = stores[productIdInStore[_productId]][_productId];
        
        return (product.id, product.name, product.category, product.imageLink, product.descLink,
                product.auctionStartTime,product.auctionEndTime, product.startPrice, product.status, product.condition);

}
}
```