点击头像进入 Settings 菜单

单机 Reveal seed words 按钮

输入账号密码解锁

查看 mnemonic 字符串

有时我们需要添加新币种，还有一个目的是为了接收空投币。

只需输入合约地址即可，其他选项会自动填充。

显示代币数量

完成代币添加

MetaMask 将钱包数据存储在浏览中 Local Storage 中，这是Chrome 谷歌浏览器特有的 Key,Value数据库。

Key 的名字是 metamask-config 将它复制到 https://metamask.github.io/vault-decryptor/ 中可以解密。

解密程序的 Github 地址 https://github.com/MetaMask/vault-decryptor

这里假设你已经安装 MetaMask 钱包，并且创建了账号，账号有足够的 ETH 用来创建合约。

我们准备一个合约

			
pragma solidity ^0.4.24;

/******************************************/
/*       Netkiller ADVANCED TOKEN         */
/******************************************/
/* Author netkiller <netkiller@msn.com>   */
/* Home http://www.netkiller.cn           */
/* Version 2018-05-23                     */
/******************************************/

contract NetkillerMiniToken {
    address public owner;
    // Public variables of the token
    string public name;
    string public symbol;
    uint public decimals;
    // 18 decimals is the strongly suggested default, avoid changing it
    uint256 public totalSupply;

    // This creates an array with all balances
    mapping (address => uint256) public balanceOf;
    mapping (address => mapping (address => uint256)) public allowance;

    // This generates a public event on the blockchain that will notify clients
    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(address indexed owner, address indexed spender, uint256 value);

    /**
     * Constrctor function
     *
     * Initializes contract with initial supply tokens to the creator of the contract
     */
    constructor(
        uint256 initialSupply,
        string tokenName,
        string tokenSymbol,
        uint decimalUnits
    ) public {
        owner = msg.sender;
        name = tokenName;                                   // Set the name for display purposes
        symbol = tokenSymbol; 
        decimals = decimalUnits;
        totalSupply = initialSupply * 10 ** uint256(decimals);  // Update total supply with the decimal amount
        balanceOf[msg.sender] = totalSupply;                // Give the creator all initial token
    }

    modifier onlyOwner {
        require(msg.sender == owner);
        _;
    }

    function transferOwnership(address newOwner) onlyOwner public {
        if (newOwner != address(0)) {
            owner = newOwner;
        }
    }
 
    /* Internal transfer, only can be called by this contract */
    function _transfer(address _from, address _to, uint _value) internal {
        require (_to != 0x0);                               // Prevent transfer to 0x0 address. Use burn() instead
        require (balanceOf[_from] >= _value);               // Check if the sender has enough
        require (balanceOf[_to] + _value > balanceOf[_to]); // Check for overflows
        balanceOf[_from] -= _value;                         // Subtract from the sender
        balanceOf[_to] += _value;                           // Add the same to the recipient
        emit Transfer(_from, _to, _value);
    }

    /**
     * Transfer tokens
     *
     * Send `_value` tokens to `_to` from your account
     *
     * @param _to The address of the recipient
     * @param _value the amount to send
     */
    function transfer(address _to, uint256 _value) public {
        _transfer(msg.sender, _to, _value);
    }

    /**
     * Transfer tokens from other address
     *
     * Send `_value` tokens to `_to` in behalf of `_from`
     *
     * @param _from The address of the sender
     * @param _to The address of the recipient
     * @param _value the amount to send
     */
    function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
        require(_value <= allowance[_from][msg.sender]);     // Check allowance
        allowance[_from][msg.sender] -= _value;
        _transfer(_from, _to, _value);
        return true;
    }

    /**
     * Set allowance for other address
     *
     * Allows `_spender` to spend no more than `_value` tokens in your behalf
     *
     * @param _spender The address authorized to spend
     * @param _value the max amount they can spend
     */
    function approve(address _spender, uint256 _value) public returns (bool success) {
        allowance[msg.sender][_spender] = _value;
        emit Approval(msg.sender, _spender, _value);
        return true;
    }
}
			
			

现在打开 https://remix.ethereum.org/

点击“+”加号创建合约，合约名称NetkillerToken, 编译合约。进入 “Run” 选项卡运行合约

Environment 设置为 Injected Web3 这时可以看到 MetaMask 中的账号以及余额, 然后设置构造方法，最后点击“transact”按钮开始部署合约。

确认手续费

remix 显示出TX Hash 表示完成。