eth solidity - 智能合约（1）众筹产品

准备
参考： http://www.tryblockchain.org/Solidity-Struct-%E6%95%B0%E6%8D%AE%E7%BB%93%E6%9E%84.html

pragma solidity ^0.4.24;

/*
** WARNING:  THIS PRODUCT IS HIGHLY ADDICTIVE.  IF YOU HAVE AN ADDICTIVE NATURE.  DO NOT PLAY.
*
*/

contract CrowdFunding{
    //投资者结构体  
    struct Funder{
        address     _addr;      //投资人钱包地址
        uint        _amount;    // 投资金额
    }
    
    struct Product{
        address     _addr;      //众筹金额地址
        string      _name;      //众筹产品名
        uint        _goal;      //希望众筹金额
        uint        _amount;    //实际众筹金额
        uint        _funderNum; //投资者统计
        //映射投资者和产品
        mapping(uint => Funder) funders;
    }
    
   //总产品数量
    uint procount;
   //记录平台产品信息
    mapping (uint => Product) public  Products;
    
    
    /*
   ** WARNING:  THIS PRODUCT IS HIGHLY ADDICTIVE.  IF YOU HAVE AN ADDICTIVE NATURE.  DO NOT PLAY.
   * function 添加一个众筹产品信息
   * address 众筹金额地址
   * name 众筹产品信息
   * gogl 希望众筹产品金额
   */
    function createProduct(address addr, string name, uint goal){
        Products[procount++] = Product({_addr:addr, _name:name, _goal:goal, _amount:0, _funderNum:0});
    }
    
    
  /*
   ** WARNING:  THIS PRODUCT IS HIGHLY ADDICTIVE.  IF YOU HAVE AN ADDICTIVE NATURE.  DO NOT PLAY.
   * function 投资人投资产品
   * index 投资第几个产品
   * amount 投资金额
   */
    function funderToProduct(uint index, uint amount) payable{
        Product product = Products[index];
        product.funders[product._funderNum] = Funder({_addr : msg.sender, _amount : amount});
        product._amount +=  product.funders[product._funderNum]._amount;
        product._funderNum++;
       
    }
}