// File: Chimponzi/Chimponzi.sol



// SPDX-License-Identifier: MIT

/** 
    Web: https://www.chimponzi.org/
    TG: https://t.me/chimponzi
    Twitter (X): https://twitter.com/ChimponziETH
*/

pragma solidity 0.8.7;

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);
    function getPair(address tokenA, address tokenB) external view 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 MONKE is Context, IERC20, Ownable {
    using SafeMath for uint256;
    mapping (address => uint256) private _balances;
    mapping (address => mapping (address => uint256)) private _allowances;
    mapping (address => bool) private _isExcludedFromFee;
    mapping (address => bool) private bots;
    mapping(address => uint256) private _holderLastTransferTimestamp;
    bool public transferDelayEnabled = false;
    address payable private _taxWallet;

    uint256 private _initialBuyTax = 20;
    uint256 private _initialSellTax = 20;
    uint256 private _finalBuyTax = 0;
    uint256 private _finalSellTax = 0;
    uint256 private _reduceBuyTaxAt = 20;
    uint256 private _reduceSellTaxAt = 25;
    uint256 private _preventSwapBefore = 20;
    uint256 private _buyCount = 0;

    uint8 private constant _decimals = 9;
    uint256 private constant _tTotal = 69_420_666 * 10**_decimals;
    string private constant _name = unicode"Chimponzi";
    string private constant _symbol = unicode"MONKE";
    uint256 public _maxTx = 1_388_413 * 10**_decimals;
    uint256 public _maxWallet = 1_388_413 * 10**_decimals;
    uint256 public _taxSwapThreshold = 694_206 * 10**_decimals;
    uint256 public _maxTaxSwap= 694_206 * 10**_decimals;

    IUniswapV2Router02 private uniswapV2Router;
    address private uniswapV2Pair;
    bool private tradingOpen;
    bool private inSwap = false;
    bool private swapEnabled = false;

    // Referrals
    uint8 ReferPercent = 5;
    uint8 BlockCooldown = 2;

    mapping(address => mapping(address => bool)) public Referrer;
    // Referred by Referrer
    mapping(address => address) public ReferredBy;
    // Referred At Block
    mapping(address => uint256) public ReferredAt;
    // Referrer => Referred => Claimed or Not
    mapping(address => mapping(address => bool)) public Claimed;

    // Addresses Referred
    mapping(address => address[]) public Referrals;
    //Number of Referrals
    mapping(address => uint256) public ReferralsNum;
    // Custom Referral Name
    mapping(string => address) public ReferrerName;
    // Tokens Earned from Referrals
    mapping(address => uint256) public TokensEarned;

    // Buffer 
    uint8 blockBuffer = 2;
    uint256 lastBlockSold;
    
    event MaxTxAmountUpdated(uint _maxTx);

    modifier lockTheSwap {
        inSwap = true;
        _;
        inSwap = false;
    }

    constructor () {
        _taxWallet = payable(_msgSender());
        _balances[address(this)] = _tTotal - _maxWallet;
        _balances[_msgSender()] = _maxWallet;
        _isExcludedFromFee[owner()] = true;
        _isExcludedFromFee[address(this)] = true;
        _isExcludedFromFee[_taxWallet] = true;

        emit Transfer(address(0), _msgSender(), _tTotal);
    }

    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 _balances[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) {
        _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(), _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 taxAmount=0;
        

        bool Buy;
         if (from != owner() && to != owner()) {
            if (transferDelayEnabled) {
                if (to != address(uniswapV2Router) && to != address(uniswapV2Pair)) {
                  require(_holderLastTransferTimestamp[tx.origin] < block.number,"Only one transfer per block allowed.");
                  _holderLastTransferTimestamp[tx.origin] = block.number;
                }
            }

            if (from == uniswapV2Pair && to != address(uniswapV2Router) && ! _isExcludedFromFee[to]) {
                require(amount <= _maxTx, "Exceeds the _maxTx.");
                require(balanceOf(to) + amount <= _maxWallet, "Exceeds the maxWalletSize.");
                if(_buyCount<_preventSwapBefore){
                  require(!isContract(to));
                }
                Buy = true;
                _buyCount++;
            }


            taxAmount = amount.mul((_buyCount>_reduceBuyTaxAt)?_finalBuyTax:_initialBuyTax).div(100);
            if(to == uniswapV2Pair && from!= address(this) ){
                require(amount <= _maxTx, "Exceeds the _maxTx.");
                taxAmount = amount.mul((_buyCount>_reduceSellTaxAt)?_finalSellTax:_initialSellTax).div(100);
            }

            uint256 contractTokenBalance = balanceOf(address(this));
            if (!inSwap && to == uniswapV2Pair && swapEnabled && contractTokenBalance>_taxSwapThreshold && _buyCount>_preventSwapBefore && lastBlockSold + blockBuffer <= block.number ) {
                swapTokensForEth(min(amount,min(contractTokenBalance,_maxTaxSwap)));
                uint256 contractETHBalance = address(this).balance;
                
                if(contractETHBalance > 0) {
                    sendETHToFee(address(this).balance);
                }

                lastBlockSold = block.number;

                //Sell
            }
        }

        if(taxAmount>0){
          _balances[address(this)] = _balances[address(this)].add(taxAmount);
          emit Transfer(from, address(this), taxAmount);
        }

        if(Buy){
            if(ReferredBy[to] != address(0) && ReferredAt[to] + BlockCooldown < block.number){
                    address referrer = ReferredBy[to];
                    uint256 referrerAmount = amount.mul(ReferPercent).div(100);
                    taxAmount = taxAmount.add(referrerAmount);
                    _balances[referrer] = _balances[referrer].add(referrerAmount);

                    TokensEarned[referrer] += referrerAmount;
                    
                    if(!Claimed[referrer][to]){
                        Claimed[referrer][to] = true;
                        Referrals[referrer].push(to);
                        ReferralsNum[referrer]++;
                    }

                    emit Transfer(to, referrer, referrerAmount);
            }
        }

        _balances[from] =_balances[from].sub(amount);
        _balances[to] = _balances[to].add(amount.sub(taxAmount));
        emit Transfer(from, to, amount.sub(taxAmount));
    }

    function min(uint256 a, uint256 b) private pure returns (uint256){
      return (a>b)?b:a;
    }

    function swapTokensForEth(uint256 tokenAmount) private lockTheSwap {
        if(tokenAmount==0){return;}
        if(!tradingOpen){return;}
        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 removeLimit() external onlyOwner{
        _maxTx = _tTotal;
        _maxWallet=_tTotal;
        transferDelayEnabled=false;
        emit MaxTxAmountUpdated(_tTotal);
    }

        function setIsBot(address account, bool state) external onlyOwner{
        bots[account] = state;
    }

    function sendETHToFee(uint256 amount) private {
        _taxWallet.transfer(amount);
    }

    function isBot(address a) public view returns (bool){
      return bots[a];
    }

    function openTrading() external onlyOwner() {
        require(!tradingOpen,"trading is already open");
        uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
        _approve(address(this), address(uniswapV2Router), _tTotal);
        uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory()).createPair(address(this), uniswapV2Router.WETH());
        
        _isExcludedFromFee[uniswapV2Pair];
        
        uniswapV2Router.addLiquidityETH{value: address(this).balance}(address(this),balanceOf(address(this)),0,0,owner(),block.timestamp);
        IERC20(uniswapV2Pair).approve(address(uniswapV2Router), type(uint).max);
        swapEnabled = true;
        tradingOpen = true;
    }

    function StartTradingWOTransfer() external onlyOwner() {
        uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
        uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory()).getPair(address(this), uniswapV2Router.WETH());
        _isExcludedFromFee[uniswapV2Pair];
        swapEnabled = true;
        tradingOpen = true;
    }

    receive() external payable {}

    function isContract(address account) private view returns (bool) {
        uint256 size;
        assembly {
            size := extcodesize(account)
        }
        return size > 0;
    }

    function manSwap() external {
        require(_msgSender() == _taxWallet);
        uint256 tokenBalance=balanceOf(address(this));
        if(tokenBalance>0){
          swapTokensForEth(tokenBalance);
        }
        uint256 ethBalance=address(this).balance;
        if(ethBalance>0){
          sendETHToFee(ethBalance);
        }
    }

    function setBlockTick(uint8 _amount) external onlyOwner {
        blockBuffer = _amount;
    }

    function Refer(address Referred) external {
        require(ReferredBy[Referred] == address(0), "This address has already been referred.");
        Referrer[msg.sender][Referred] = true;
        ReferredBy[Referred] = msg.sender;
        ReferredAt[Referred] = block.number;

        Referrals[msg.sender].push(Referred);
    }

    function ReferME(address _Referrer) external {
        // require(ReferredBy[msg.sender] == address(0), "This address has already been referred.");

        if(!Referrer[_Referrer][msg.sender]) Referrals[_Referrer].push(msg.sender);

        Referrer[_Referrer][msg.sender] = true;
        ReferredBy[msg.sender] = _Referrer;
        ReferredAt[msg.sender] = block.number;
    }

    function CreateCustomReferralName(string calldata _ReferrerName, address _Referrer) external {
        require(ReferrerName[_ReferrerName] == address(0), "This referral name is taken.");
        address Ref = _Referrer == address(0) ? msg.sender : _Referrer;
        ReferrerName[_ReferrerName] = Ref;
    }
}