Solidity - 我如何從另一個合約轉移到 msg.sender

Question

我想知道我如何從轉移中設置原點...

我有這個合同（我的實際合同比那個大，但這是最重要的部分......）：

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;


contract Testing{
    address payable public manager;

    constructor(){
         manager =payable(msg.sender);
    }

    function getMoneyFromManager(uint quantity) public payable{
        //someone different from manager should recieve money from manager
        //something like: msg.sender.transfer(quantity) => FROM MANAGER
    }

}

Answer 1

出於安全目的，請勿使用transfer 。 據我了解，您想從manager向函數的調用者匯款。

// this function is not safe. because any one can call this will get money
function getMoneyFromManager(uint quantity) public payable{
    // first require that u have enouth balance
    require(address(this).balance>quantity,"not enough funds")
    (bool success,)=msg.sender.call{value:quantity}("");
    require(success,"Transfer failed!");
}