【区块链2.0实战学习笔记】————16、Remix+MetaMask实现以太坊合约的部署

    xiaoxiao2022-07-07  140

    准备

    1、编写好的ERC20智能合约一份:

    pragma solidity ^0.4.17; contract Token{ uint256 public totalSupply; function balanceOf(address _owner) public constant returns (uint256 balance); function transfer(address _to, uint256 _value) public returns (bool success); function transferFrom(address _from, address _to, uint256 _value) public returns (bool success); function approve(address _spender, uint256 _value) public returns (bool success); function allowance(address _owner, address _spender) public constant returns (uint256 remaining); event Transfer(address indexed _from, address indexed _to, uint256 _value); event Approval(address indexed _owner, address indexed _spender, uint256 _value); } contract test is Token { string public name; //名称,例如"My test token" uint8 public decimals; //返回token使用的小数点后几位。比如如果设置为3,就是支持0.001表示. string public symbol; //token简称,like MTT function test(uint256 _initialAmount, string _tokenName, uint8 _decimalUnits, string _tokenSymbol) public { totalSupply = _initialAmount * 10 ** uint256(_decimalUnits); // 设置初始总量 balances[msg.sender] = totalSupply; // 初始token数量给予消息发送者,因为是构造函数,所以这里也是合约的创建者 name = _tokenName; decimals = _decimalUnits; symbol = _tokenSymbol; } function transfer(address _to, uint256 _value) public returns (bool success) { require(balances[msg.sender] >= _value && balances[_to] + _value > balances[_to]); require(_to != 0x0); balances[msg.sender] -= _value;//从消息发送者账户中减去token数量_value balances[_to] += _value;//往接收账户增加token数量_value Transfer(msg.sender, _to, _value);//触发转币交易事件 return true; } function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) { require(balances[_from] >= _value && allowed[_from][msg.sender] >= _value); balances[_to] += _value;//接收账户增加token数量_value balances[_from] -= _value; //支出账户_from减去token数量_value allowed[_from][msg.sender] -= _value;//消息发送者可以从账户_from中转出的数量减少_value Transfer(_from, _to, _value);//触发转币交易事件 return true; } function balanceOf(address _owner) public constant returns (uint256 balance) { return balances[_owner]; } function approve(address _spender, uint256 _value) public returns (bool success) { require((_value == 0) || (allowed[msg.sender][_spender] == 0)); allowed[msg.sender][_spender] = _value; Approval(msg.sender, _spender, _value); return true; } function allowance(address _owner, address _spender) public constant returns (uint256 remaining) { return allowed[_owner][_spender];//允许_spender从_owner中转出的token数 } mapping (address => uint256) balances; mapping (address => mapping (address => uint256)) allowed; }

    2、MetaMask账户(如果想要放大界面可以进行以下操作)

    3、Remix在线IDE:

    http://remix.ethereum.org/#optimize=false&version=soljson-v0.4.17+commit.bdeb9e52.js

     

    合约部署

    在同一浏览器中打开Remix、MetaMask,之后使用个人账户登录MetaMask,之后你可以采用导入私钥的方式导入钱包账户(用于创建合约的账户,需要有ETH,因为部署合约的过程中会有费用哦)

    选择网络(这里选择测试网络,如果要真的发币,则需要选择Main Ethereum Network),同时更换为有eth的账户:

    编译合约:

    部署合约(需要同时进行初始化操作哦):

    之后会弹出MetaMask确认框来确认该交易(合约部署操作):

    之后你会看到有创建合约的

    过一段时间你会看到有MetaMask的通知消息,通知transaction已经被确认了:

    确认记录:

    之后你可以从模拟的etherScan中查看该交易的记录:

    之后合约部署成功:

    之后点击智能合约地址链接,进入合约详情页面:

    查看code:

    之后校验合约:

    之后选择

    之后选择文件去验证一致性就OK:

    在真正的以太坊上部署合约只需要将上面的网络改为Main Ether就OK!其余操作不变

    写作不易,请作者喝杯奶茶吧!

     

     

     

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