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lesson-3

README.md

第三课 ｜ Lesson 3

中文 | English

内容介绍

这是 Web3_tutorial 的一部分。
视频链接：WIP

在第二课，你将会编写第二个智能合约 FundMe，通过编写和学习这个智能合约中，我们将会学习到如何在一条区块链上发送原生token给一个合约，记录转账信息，如何提取收集的token，如何设置时间锁。

在这一课中，你将完成以下合约：

  • FundMe.sol合约：该合约是募集资金的合约，通过函数来接受funder的ETH
  • FundMe_flattened.sol合约：该合约是FundMe合约的flatten版本，可以通过 Remix flatten 插件生成，用于EtherScan上的合约验证
  • FundMeToken.sol合约：该合约是带有基本功能的 Token 合约
  • FundMeTokenWithBurn.sol合约：该合约继承FundToken合约，并且增加了burn函数
  • FundMeTokenERC20.sol合约：该合约是继承Openzeppelin ERC20标准的 FundToken 合约
  • FundMeTokenERC20_flattened.sol合约：该合约是FundMeTokenERC20合约的flatten版本，可以通过 Remix flatten 插件生成，用于EtherScan上的合约验证

如何使用

  1. 编译并且部署 FundMe.sol 合约
  • 打开 Remix
  • 新建一个文件，并且命名为 FundMe.sol
  • 点击 Compile
  • 通过 metamask 领取 SepoliaETH
  • 选择 injected provider，点击 Deploy
  • 在 remix 中，右键点击合约名称，选择 flatten
  • 在 sepolia 区块链浏览器中对合约进行验证
  1. 编译并且部署 FundMeToken.sol合约
  • 新建一个文件，并且命名为 FundMeToken.sol
  • 点击 Compile
  • 点击 Deploy
  • 在 remix 中，右键点击合约名称，选择 flatten
  • 在 sepolia 区块链浏览器中对合约进行验证
  1. 编译并且部署 FundMeTokenERC20.sol合约
  • 新建一个文件，并且命名为 FundMeTokenERC20.sol
  • 点击 Compile
  • 在 remix 中，右键点击合约名称，选择 flatten
  • 在 sepolia 区块链浏览器中对合约进行验证

更多的相关内容请查看Web3_tutorial的 README.md。

introduction

This is part of the Web3_tutorial.
Video link: WIP

In the second lesson, you will write the second smart contract FundMe. By writing and learning about this smart contract, we will learn how to send native tokens to a contract on a blockchain, record transfer information, how to withdraw collected tokens, and how to set a time lock.

In this lesson, you will complete the following contracts:

  • FundMe.sol contract: This contract is for fundraising, it accepts ETH from funders through functions.
  • FundMe_flattened.sol contract: This contract is a flattened version of the FundMe contract, which can be generated using the Remix flatten plugin for contract verification on EtherScan.
  • FundMeToken.sol contract: This contract is a Token contract with basic functionality.
  • FundMeTokenWithBurn.sol contract: This contract inherits the FundToken contract and adds a burn function.
  • FundMeTokenERC20.sol contract: This contract is a FundToken contract that inherits the OpenZeppelin ERC20 standard.
  • FundMeTokenERC20_flattened.sol contract: This contract is a flattened version of the FundMeTokenERC20 contract, which can be generated using the Remix flatten plugin for contract verification on EtherScan.

Getting Started

  1. Compile and deploy the FundMe.sol contract
  • Open Remix
  • Create a new file named FundMe.sol
  • Click Compile
  • Get SepoliaETH through Metamask
  • Select the injected provider and click Deploy
  • In Remix, right-click on the contract name and select flatten
  • Verify the contract on SepoliaScan
  1. Compile and deploy the FundMeToken.sol contract
  • Create a new file named FundMeToken.sol
  • Click Compile
  • Click Deploy
  • In Remix, right-click on the contract name and select flatten
  • Verify the contract on SepoliaScan
  1. Compile and deploy the FundMeTokenERC20.sol contract
  • Create a new file named FundMeTokenERC20.sol
  • Click Compile
  • In Remix, right-click on the contract name and select flatten
  • Verify the contract on SepoliaScan

For more related content, please refer to the README.md of Web3_tutorial.