javascript - 如何解决错误 "Invalid type for argument in function call. Invalid implicit conversion from address to address payable requested"

Question

我在混音中遇到这个错误:

Invalid type for argument in function call. Invalid implicit conversion from address to address payable requested

它指的是下面第 9 行的 msg.sender。这是我正在编写的代码:

function startProject(
        string calldata title,
        string calldata description,
        uint durationInDays,
        uint amountToRaise
    ) external {
        uint raiseUntil = block.timestamp.add(durationInDays.mul(1 days));
Project newProject = new Project(
    msg.sender,
    title,
    description,
    raiseUntil,
    amountToRaise
);
projects.push(newProject);

为什么会出现此错误？我该如何解决？

Answer 1

linked code包含 contract Project 及其 constructor 的定义:

constructor
(
    address payable projectStarter,
    string memory projectTitle,
    string memory projectDesc,
    uint fundRaisingDeadline,
    uint goalAmount
) public {
    // ...
}

它接受 address payable 作为第一个参数。但是，默认情况下，msg.sender 不是payable(自 Solidity 0.8.0 起)。

解决方案:将 address 类型转换为 address payable:

Project newProject = new Project(
    payable(msg.sender),
    title,
    description,
    raiseUntil,
    amountToRaise
);