ERC20 合约代码（可增发）

合约代码

pragma solidity ^0.4.8;
contract Token{
    // token总量，默认会为public变量生成一个getter函数接口，名称为totalSupply().
    uint256 public totalSupply;

    /// 获取账户_owner拥有token的数量 
    function balanceOf(address _owner) constant returns (uint256 balance);

    //从消息发送者账户中往_to账户转数量为_value的token
    function transfer(address _to, uint256 _value) returns (bool success);

    //从账户_from中往账户_to转数量为_value的token，与approve方法配合使用
    function transferFrom(address _from, address _to, uint256 _value) returns   
    (bool success);

    //消息发送账户设置账户_spender能从发送账户中转出数量为_value的token
    function approve(address _spender, uint256 _value) returns (bool success);

    //获取账户_spender可以从账户_owner中转出token的数量
    function allowance(address _owner, address _spender) constant returns 
    (uint256 remaining);

    //发生转账时必须要触发的事件 
    event Transfer(address indexed _from, address indexed _to, uint256 _value);

    //当函数approve(address _spender, uint256 _value)成功执行时必须触发的事件
    event Approval(address indexed _owner, address indexed _spender, uint256 
    _value);
}

contract StandardToken is Token {
    function transfer(address _to, uint256 _value) returns (bool success) {
        //默认totalSupply 不会超过最大值 (2^256 - 1).
        //如果随着时间的推移将会有新的token生成，则可以用下面这句避免溢出的异常
        //require(balances[msg.sender] >= _value && balances[_to] + _value > balances[_to]);
        require(balances[msg.sender] >= _value);
        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) returns 
    (bool success) {
        //require(balances[_from] >= _value && allowed[_from][msg.sender] >= 
        // _value && balances[_to] + _value > balances[_to]);
        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) constant returns (uint256 balance) {
        return balances[_owner];
    }


    function approve(address _spender, uint256 _value) returns (bool success)   
    {
        allowed[msg.sender][_spender] = _value;
        Approval(msg.sender, _spender, _value);
        return true;
    }


    function allowance(address _owner, address _spender) 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;
}

contract HumanStandardToken is StandardToken { 
    address public owner;
    /* Public variables of the token */
    string public name;                   //名称: eg Simon Bucks
    uint8 public decimals;               //最多的小数位数，How many decimals to show. ie. There could 1000 base units with 3 decimals. Meaning 0.980 SBX = 980 base units. It's like comparing 1 wei to 1 ether.
    string public symbol;               //token简称: eg SBX
    string public version = 'H0.1';    //版本

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

    function HumanStandardToken(uint256 _initialAmount, string _tokenName, uint8 _decimalUnits, string _tokenSymbol) {
        balances[msg.sender] = _initialAmount; // 初始token数量给予消息发送者
        totalSupply = _initialAmount;         // 设置初始总量
        name = _tokenName;                   // token名称
        decimals = _decimalUnits;           // 小数位数
        symbol = _tokenSymbol;             // token简称
        owner = msg.sender;
    }

    /* Approves and then calls the receiving contract */
    
    function approveAndCall(address _spender, uint256 _value, bytes _extraData) returns (bool success) {
        allowed[msg.sender][_spender] = _value;
        Approval(msg.sender, _spender, _value);
        //call the receiveApproval function on the contract you want to be notified. This crafts the function signature manually so one doesn't have to include a contract in here just for this.
        //receiveApproval(address _from, uint256 _value, address _tokenContract, bytes _extraData)
        //it is assumed that when does this that the call *should* succeed, otherwise one would use vanilla approve instead.
        require(_spender.call(bytes4(bytes32(sha3("receiveApproval(address,uint256,address,bytes)"))), msg.sender, _value, this, _extraData));
        return true;
    }

    // 增发，给某个地址增加代币金额
    function mintToken(address target, uint256 mintedAmount) public onlyOwner returns (bool success){
        balances[target] += mintedAmount;
        totalSupply += mintedAmount;
        Transfer(0, owner, mintedAmount);
        Transfer(owner, target, mintedAmount);
        return true;
    }


}

测试

发布后使用代码测试：

var Web3 = require("web3");
var Tx = require('ethereumjs-tx');
var coin = require('../conf/coin');

var web3 = new Web3();

web3.setProvider(new web3.providers.HttpProvider("https://ropsten.infura.io/v3/18b6909fdc9b4ba0af57772357f035a9"));
web3.eth.defaultAccount = "0x2b547f3098408f0632a4063eb1c86595efbaf470";

var token_name = 'CHUSDT10';

var token_contract = new web3.eth.Contract(coin[token_name].abi, coin[token_name].contractId);

// 0x3945aD33d03f9fe2C19131Dc5366b1FBe186
// 0x2b547f3098408f0632a4063eb1c86595f470
var account_addr = '0x3945aD33d03f9fe2C19131Dc5366b1FBe186';

getbalance();
// mind();

function getbalance() {
    token_contract.methods.balanceOf('0x3945aD33d03f9fe2C19131Dc5366b1FBe186').call(function(err, result) {
        if (err) {
            console.log({ success: false, error: err });
        } else {
            console.log({ success: true, result: result });
        }
    });
}

function mind() {
    // 0x3945aD33d03f9fe2C19131Dc5366b1FBe186 的密钥
    var privKey = new Buffer.from('406ab1f237d6168413d8ee21dbe777158979fe8eb39a5edb394b3068c9', 'hex');
    web3.eth.getTransactionCount('0x3945aD33d03f9fe2C19131Dc5366b1FBe186', (err, txCount) => {
        if (err) {
            res.json({ success: false, error: err });
            return;
        }

        const txObject = {
            nonce: web3.utils.toHex(txCount),
            gasLimit: web3.utils.toHex(800000),
            gasPrice: web3.utils.toHex(web3.utils.toWei('10', 'gwei')),
            to: coin[token_name].contractId,
            data: token_contract.methods.mintToken('0x3945aD33d03f9fe2C19131Dc5366b1FBe186', 1000).encodeABI()
        }

        const tx = new Tx(txObject)
        tx.sign(privKey)
        const serializedTx = tx.serialize()

        web3.eth.sendSignedTransaction('0x' + serializedTx.toString('hex'), (err, txHash) => {
            if (err) {
                console.log('err', err);
                return;
            }

            console.log('ok', txHash);
        })
    })
}