compiler-errors - SOLIDITY REMIX 编译器，在部署我的合约后出现此错误(无效的 BigNumber 字符串)

Question

我正在研究我的 Udemy 类(class)项目..这门类(class)的问题是使用了旧版本 solidity 0.4.17..我正在尝试将此项目更新为当前版本...更新代码后并尝试在 Remix 编译器上编译...它编译时在特定行上没有任何错误或警告，但是当我尝试在 remix 上部署合约时:

它显示:

创建事件出错:参数编码错误:错误:BigNumber 字符串无效(argument="value", value="", code=INVALID_ARGUMENT, version=bignumber/5.1.1)

所以我不太明白这里的问题是什么？

这是我的 solidity 合约代码:

    // SPDX-License-Identifier: GPL-3.0

pragma solidity >0.4.17 <0.8.0;

 contract CampaignFactory {

    address[] public deployedCampaigns;

    function createCampaign(uint minimum) public {
        address newCampaign = address ( new Campaign(minimum, msg.sender));
        deployedCampaigns.push(newCampaign);
    }

    function getDeployedCampaigns() public view returns (address[] memory) {
        return deployedCampaigns;
    }
}

contract Campaign {
    
    struct Request {
        string description;
        uint value;
        address recipient;
        bool complete;
        uint approvalCount;
        mapping(address => bool) approvals;
    }
    
    Request[] public requests;
    address public manager;
    
    uint public minimumContribution;
    
    mapping(address => bool) public approvers;
    
    uint public approversCount;
  
    modifier restricted() {
        require(msg.sender == manager);
        _;
    }
    
    constructor(uint minimum, address creator){
        
        manager = creator;
        minimumContribution = minimum;
    }
    
    function contribute() public payable {
        require(msg.value > minimumContribution);
        
        approvers[msg.sender] = true;
        approversCount++;
    }
    
    uint numRequest;
    
    
    function creatRequest(string memory description, uint value, address recipient) public restricted {
                
        Request storage newRequest = requests[numRequest++];
           newRequest.description = description;
           newRequest.value = value;
           newRequest.recipient = recipient;
           newRequest.complete = false;
           newRequest.approvalCount = 0;
        
    }
    
    function approveRequest(uint index) public {
        Request storage request = requests[index];
        require(approvers[msg.sender]);
        require(!request.approvals[msg.sender]);
        
        request.approvals[msg.sender] = true;
        request.approvalCount++;
    }
    
    
    function finalizeRequest(uint index) public restricted {
        Request storage request = requests[index];
        
        require(request.approvalCount > (approversCount / 2));
        require(!request.complete);
        
        payable(request.recipient).transfer(request.value);
        request.complete = true;
    }
}

预先感谢您花时间看这个问题...

编辑:

好的，我管理器传递了这个错误，但是现在当我尝试创建我的请求时，我得到了一个错误:

[vm] from: 0x5B3...eddC4to: Campaign.creatRequest(string,uint256,address) 0x7b9...b6AcEvalue: 0 weidata: 0x83e...00000logs: 0hash: 0x8d9...a5ccb交易到 Campaign.creatRequest 错误:VM 错误:无效的操作码。 invalid opcode 执行可能已抛出。调试事务以获取更多信息。

所以我做的步骤:

1. 将我的最低贡献设置为“0”并添加创作者地址“0x0ABC”

2. 我用相同的地址“0x0ABC”贡献了 1 个以太币

3. 然后我从混音副本中随机选择一个不同的地址并粘贴到我的“创建请求”我添加字符串“字符串”金额“单位”地址“0x0CCC”

当我点击 createRequest 时，我得到了上面提到的这个错误；

Answer 1

Solidity 目前 (v0.8) 不允许将“包含映射的结构”写入存储数组。但是您可以将其写入映射。

mapping (uint => Request) public requests;  // changed to mapping

代替

Request[] public requests;  // original code

您将失去检索数组长度的能力。但是您已经将它保存在 numRequest 变量中，所以一切都很好。