ERC20合约验证教程

上次我们研究了ERC20代币的合约部署教程，这次我们来继续验证合约，亲测可以过Scroll、Taiko、Linea、Base等测试网的合约验证。

首先我们还是按照上次的合约部署教程部署一个ERC20合约

https://mirror.xyz/bitbigcat.eth/rgOa6S3Ly-KEc70sUINbAYEcDhj9OAcsyQufc6s7Jz0

部署好了之后，还是照常把币MINT到自己的钱包里，但Remix的网站不要关闭

然后打开相应的测试网区块链浏览器，比如我打开的是Linea测试网的区块链浏览器，输入自己的地址，然后找到自己部署的那个代币。

我这里是自己部署的Linea代币LNA，点击下方的Code。

打开后，点击右下方Verify那个按钮

然后打开选择第一个Via flattened source code

将合约部署的选项调整好，如下图：

然后把下面的代码复制到下面的框框里，点击下面的Verify&pubulish按钮即可


// File: ERC20.sol


// WTF Solidity by 0xAA

pragma solidity ^0.8.4;

interface IERC20 {
    /**
     * @dev 释放条件：当 `value` 单位的货币从账户 (`from`) 转账到另一账户 (`to`)时.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev 释放条件：当 `value` 单位的货币从账户 (`owner`) 授权给另一账户 (`spender`)时.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);

    /**
     * @dev 返回代币总供给.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev 返回账户`account`所持有的代币数.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev 转账 `amount` 单位代币，从调用者账户到另一账户 `to`.
     *
     * 如果成功，返回 `true`.
     *
     * 释放 {Transfer} 事件.
     */
    function transfer(address to, uint256 amount) external returns (bool);

    /**
     * @dev 返回`owner`账户授权给`spender`账户的额度，默认为0。
     *
     * 当{approve} 或 {transferFrom} 被调用时，`allowance`会改变.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev 调用者账户给`spender`账户授权 `amount`数量代币。
     *
     * 如果成功，返回 `true`.
     *
     * 释放 {Approval} 事件.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev 通过授权机制，从`from`账户向`to`账户转账`amount`数量代币。转账的部分会从调用者的`allowance`中扣除。
     *
     * 如果成功，返回 `true`.
     *
     * 释放 {Transfer} 事件.
     */
    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) external returns (bool);
}

contract ERC20 is IERC20 {

    mapping(address => uint256) public override balanceOf;

    mapping(address => mapping(address => uint256)) public override allowance;

    uint256 public override totalSupply;   // 代币总供给

    string public name;   // 名称
    string public symbol;  // 符号
    
    uint8 public decimals = 18; // 小数位数
    address public owner;

    // @dev 在合约部署的时候实现合约名称和符号
    constructor(string memory name_, string memory symbol_){
        name = name_;
        symbol = symbol_;
        owner = msg.sender;
    }

    // @dev 实现`transfer`函数，代币转账逻辑
    function transfer(address recipient, uint amount) external override returns (bool) {
        balanceOf[msg.sender] -= amount;
        balanceOf[recipient] += amount;
        emit Transfer(msg.sender, recipient, amount);
        return true;
    }

    // @dev 实现 `approve` 函数, 代币授权逻辑
    function approve(address spender, uint amount) external override returns (bool) {
        allowance[msg.sender][spender] = amount;
        emit Approval(msg.sender, spender, amount);
        return true;
    }

    // @dev 实现`transferFrom`函数，代币授权转账逻辑
    function transferFrom(
        address sender,
        address recipient,
        uint amount
    ) external override returns (bool) {
        allowance[sender][msg.sender] -= amount;
        balanceOf[sender] -= amount;
        balanceOf[recipient] += amount;
        emit Transfer(sender, recipient, amount);
        return true;
    }

    // @dev 铸造代币，从 `0` 地址转账给 调用者地址
    function mint(uint amount) external {
        require(owner == msg.sender);
        balanceOf[msg.sender] += amount;
        totalSupply += amount;
        emit Transfer(address(0), msg.sender, amount);
    }

    // @dev 销毁代币，从 调用者地址 转账给  `0` 地址
    function burn(uint amount) external {
        balanceOf[msg.sender] -= amount;
        totalSupply -= amount;
        emit Transfer(msg.sender, address(0), amount);
    }

}