# 发送以太币（transfer、send、call）

**Published by:** [kaiming](https://paragraph.com/@kaiming/)
**Published on:** 2022-07-28
**URL:** https://paragraph.com/@kaiming/transfer-send-call

## Content

发送以太币（transfer、send、call） 在以太坊中send, transfer, call都可以进行转账操作，那么他们究竟有什么区别呢？ 那么如何发送以太币呢？ transfer(2300gas，如果失败则throw) send(2300gas，如果失败则返回false) call(默认情况下将所有可用的gas传输过去，gas传输量可调，如果失败则返回false) 如何接收以太币？ 接收以太币的合约必须至少具有以下功能之一： receieve() external payable fallback() external payable 如果发送方的msg.data为空，那么将调用receive()，否则调用fallback()。 send与transfer对比简析 相同之处 均是向目标地址发送以太币（以Wei为单位） 发送以太币，都需要消耗固定的2300gas（gas数量少，只允许接收方合约执行最简单的操作） 不同之处 send执行失败会返回false，不阻碍程序的运行。transfer执行失败后会抛出异常。 // SPDX-License-Identifier: MIT pragma solidity ^0.8.10; contract ReceiveEther { /* Which function is called, fallback() or receive()? send Ether | msg.data is empty? / \ yes no / \ receive() exists? fallback() / \ yes no / \ receive() fallback() */ // Function to receive Ether. msg.data must be empty receive() external payable {} // Fallback function is called when msg.data is not empty fallback() external payable {} function getBalance() public view returns (uint) { return address(this).balance; } } contract SendEther { function sendViaTransfer(address payable _to) public payable { // This function is no longer recommended for sending Ether. _to.transfer(msg.value); } function sendViaSend(address payable _to) public payable { // Send returns a boolean value indicating success or failure. // This function is not recommended for sending Ether. bool sent = _to.send(msg.value); require(sent, "Failed to send Ether"); } function sendViaCall(address payable _to) public payable { // Call returns a boolean value indicating success or failure. // This is the current recommended method to use. (bool sent, bytes memory data) = _to.call{value: msg.value}(""); require(sent, "Failed to send Ether"); } } 参考资料 Solidity by Example v 0.8.10 细究以太坊中send/transfer/call/delegatecall

## Publication Information

- [kaiming](https://paragraph.com/@kaiming/): Publication homepage
- [All Posts](https://paragraph.com/@kaiming/): More posts from this publication
- [RSS Feed](https://api.paragraph.com/blogs/rss/@kaiming): Subscribe to updates