获取用户 ID 并将其保存在 function - Solidity 初学者

Question

这是我的第一个Solidity项目。

我正在尝试创建一种供应链，而不仅仅是练习代码。

我遇到了一个我无法解决或在网上找到解决方案的问题。

问题：我想获取用户 ID 并将其保存在每个function中，所以它看起来像......

function Customer() public {
       checked = Process.Received;
       status = Process.NotPaid;
       //userid = Process.< THE ID >
     }

我试过这个...

function getStruct() public
     view
     returns (string, uint)
     {
         return (User);

     }

但一直要求我将数据放在memory中。 我尝试过但对我不起作用。

完整代码：

pragma solidity ^0.5.1;

contract SupplyChain {

  enum Process {
    Unknown,
    Checked,
    Received,
    Paid,
    NotPaid
  }

     Process public status;
     Process public checked;
     Process public userid;


     address user;

     struct User {
       uint  _id;
       string  _firstName;
       string  _lastName;
     }


     constructor() public {
       status = Process.Unknown;
       user = tx.origin;
     }




     function addUser(
       uint256 id,
       string memory _firstName,
       string memory _lastName
     ) public{

     }
// NOT FINISHED NEED TO RETURN USER ID TO PRINT IN TRACKERS.
     function getStruct() public
     view
     returns (string, uint)
     {
         return (User);

     }

     function Factory() public {
       checked = Process.Checked;
       status = Process.NotPaid;
       // print userid
     }
     function TransportOne() public {
       checked = Process.Checked;
       status = Process.NotPaid;
       // print userid
     }
     function Deposit() public {
       checked = Process.Checked;
       status = Process.NotPaid;
       // print userid
     }
     function TransportTwo() public {
       checked = Process.Checked;
       status = Process.NotPaid;
       // print userid
     }
     function Customer() public {
       checked = Process.Received;
       status = Process.NotPaid;
       // print userid
     }

}

Answer 1

solidity 没有print ，可以尝试使用 事件进行日志记录。

如果你只是想调试，你可以试试Remix IDE 。