第152篇 Solidity 中的 Call

目录

1.Call

2.Delegatecall

3.Calling Other Contract

4.Multi Call

5.Multi Delegatecall

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1.Call

call 是一个与其他合约交互的底层函数；

通过调用 fallback 函数发送 ether 时建议使用的方法；

但这不是调用现有函数的推荐方法；

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.13;

contract Receiver {
    event Received(address caller, uint amount, string message);

    fallback() external payable {
        emit Received(msg.sender, msg.value, "Fallback was called");
    }

    function foo(string memory _message, uint _x) public payable returns (uint) {
        emit Received(msg.sender, msg.value, _message);

        return _x + 1;
    }
}

contract Caller {
    event Response(bool success, bytes data);

    // Let's imagine that cont