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);
})
})
}