# Solidity学习之接收发送代币

**Published by:** [林夕云](https://paragraph.com/@0xa91ccaeb1206a1fe86c00801555afa1d79fbdd52/)
**Published on:** 2022-09-09
**URL:** https://paragraph.com/@0xa91ccaeb1206a1fe86c00801555afa1d79fbdd52/solidity-3

## Content

Solidity学习之函数接收eth 如果要让合约可以接受eth，那么需要payable修饰将要调用的函数，否则函数不能接受eth // SPDX-License-Identifier: GPL-3.0 pragma solidity 0.8.7; contract A{ address payable public owner; constructor(){ owner =payable( msg.sender); } function deposit() external payable { } function getBalance() external view returns (uint) { return address(this).balance; } } 合约接收eth 当合约定义了Fallback或者Recieve函数，当你调用合约不存在的函数时，会默认调用他们，data是空的时候会优先调用Fallback，所以只要把这两个函数定义为payable，则合约可以接受eth 发送eth 有三种方式，tansfer，send，call // SPDX-License-Identifier: GPL-3.0 pragma solidity 0.8.7; contract A{ constructor() payable { } function transfer(address payable to) external payable { //不返回任何信息，原子化操作 to.transfer(123); } function send(address payable to) external payable{ bool a =to.send(123); //返回是否成功 require(a,"sendfailed"); } function call(address payable to) external payable{ //返回是否成功及msg (bool a,) = to.call{value:123}(""); require(a,"call failed"); } } contract B{ event log(string msg); fallback() external payable { emit log("oh money"); } function balance() external view returns (uint){ return address(this).balance; } }

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