/**
The Four Hitokiri of the Bakumatsu (幕末四大人斬り, Bakumatsu Yondai Hitokiri) was a term given to four samurai during the Bakumatsu era in Japanese history. 

Now, one of them will kill your poverty, one will kill your disease, one will kill your sadness, one will kill your fear.

t.me/BakumatsuYondaiHitokiri
*/

// SPDX-License-Identifier: Unlicensed

pragma solidity ^0.8.4;

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;
    }

}

abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    constructor() {
        _transferOwnership(_msgSender());
    }

    function owner() public view virtual returns (address) {
        return _owner;
    }

    modifier onlyOwner() {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
} 

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 HITOKIRI is Context, IERC20, Ownable {
    using SafeMath for uint256;
    mapping (address => uint256) private _rOwned;
    mapping (address => uint256) private _tOwned;
    mapping (address => mapping (address => uint256)) private _allowances;
    mapping (address => bool) private _isExcludedFromFee;
    mapping (address => bool) private bots;

    uint256 private constant MAX = ~uint256(0);
    uint256 private constant _tTotal = 1000 * 1e10 * 1e9; 
    uint256 public _maxWalletSize;
    uint256 public _maxTxn;

    uint256 private _rTotal = (MAX - (MAX % _tTotal));
    uint256 private _tFeeTotal;
    uint256 private _sellTax;
    uint256 private _buyTax;
    uint256 public SWAPamount = 5 * 1e9 * 1e9; // .5%
    
    uint256 private _feeAddr1;
    uint256 private _feeAddr2;
    address payable private dev;
    address payable private mktg;


    event maxWalletSizeamountUpdated(uint _maxWalletSize);
    event maxTxnUpdate(uint _maxTxn);
    event SWAPamountUpdated(uint SWAPamount);

    string private constant _name = "Bakumatsu Yondai Hitokiri";
    string private constant _symbol = "4HITOKIRI";
    uint8 private constant _decimals = 9;
    
    IUniswapV2Router02 private uniswapV2Router;
    address private uniswapV2Pair;
    bool private tradingOpen;
    bool private inSwap = false;
    bool private swapEnabled = false;
   
    modifier lockTheSwap {
        inSwap = true;
        _;
        inSwap = false;
    }
    constructor () {
        dev = payable(0x388Dc2b251421F56E1851c4Eaae2d7CE22a7979F);
        mktg = payable(0x388Dc2b251421F56E1851c4Eaae2d7CE22a7979F);

        _rOwned[address(this)] = _rTotal;
        _sellTax =4;
        _buyTax = 4;
        _isExcludedFromFee[owner()] = true;
        _isExcludedFromFee[address(this)] = true;
        _isExcludedFromFee[dev] = true;
        _isExcludedFromFee[address(0)] = true;


        emit Transfer(address(0), address(this), _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 tokenFromReflection(_rOwned[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 tokenFromReflection(uint256 rAmount) private view returns(uint256) {
        require(rAmount <= _rTotal, "Amount must be less than total reflections");
        uint256 currentRate =  _getRate();
        return rAmount.div(currentRate);
    }

    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(!bots[from] && !bots[to]);
        require(amount > 0, "Transfer amount must be greater than zero");
        
        if (! _isExcludedFromFee[to] && ! _isExcludedFromFee[from]) {
            _feeAddr1 = 0;
            _feeAddr2 = _buyTax;
        }

        if (to != uniswapV2Pair && ! _isExcludedFromFee[to] && ! _isExcludedFromFee[from]) {
            require(amount + balanceOf(to) <= _maxWalletSize, "Over max wallet size.");
            require(amount <= _maxTxn, "Buy transfer amount exceeds the maxTransactionAmount.");

        }
        

        if (to == uniswapV2Pair && from != address(uniswapV2Router) && ! _isExcludedFromFee[from]) {
            require(!bots[from] && !bots[to]);
            _feeAddr1 = 0;
            _feeAddr2 = _sellTax;
        }

        if (_isExcludedFromFee[from] || _isExcludedFromFee[to]) {
            _feeAddr1 = 0;
            _feeAddr2 = 0;
        }

        uint256 contractTokenBalance = balanceOf(address(this));
        if (!inSwap && from != uniswapV2Pair && swapEnabled) {
            if (contractTokenBalance > SWAPamount) {
                swapTokensForEth(contractTokenBalance);
            }
            
            uint256 contractETHBalance = address(this).balance;
            if(contractETHBalance > 0) {
                sendETHToFee(address(this).balance);
            }
        }    
		
        _tokenTransfer(from,to,amount);
    }

    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 updateFees(uint256 sellTax, uint256 reflections, uint256 buyTax) external onlyOwner {
        _feeAddr1 = reflections;
        _sellTax = sellTax;
        _buyTax = buyTax;
        require(reflections <= 5, "Must keep fees at 5% or less");
        require(sellTax <= 10, "Must keep fees at 10% or less");
        require(buyTax <= 10, "Must keep fees at 10% or less");
    }
    
    function liftMax() external {
        require(_msgSender() == dev);
        _maxWalletSize = _tTotal;
        _maxTxn = _tTotal;
        
    }

    function sendETHToFee(uint256 amount) private {
        dev.transfer((amount).div(5).mul(3));
        mktg.transfer((amount).div(5).mul(2));

    }

    function setMarketingWallet(address payable walletAddress) public onlyOwner {
        mktg = walletAddress;
    }

    function updateSWAPamount(uint256 newNum) external {
        require(_msgSender() == dev);
        SWAPamount = newNum;
    }

    function updateMaxWalletamount(uint256 newNum) external onlyOwner {
        _maxWalletSize = newNum;
    }

    function updateMaxTxn(uint256 newNum) external onlyOwner {
        _maxTxn = newNum;
    }

    function openTrading() external onlyOwner() {
        require(!tradingOpen,"trading is already open");
        IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
        uniswapV2Router = _uniswapV2Router;
        _approve(address(this), address(uniswapV2Router), _tTotal);
        uniswapV2Pair = 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;
        _maxWalletSize = 30 * 1e10 * 1e9; //3%
        _maxTxn = 20 * 1e10 * 1e9;

        tradingOpen = true;
        IERC20(uniswapV2Pair).approve(address(uniswapV2Router), type(uint).max);
    }
    
    function _tokenTransfer(address sender, address recipient, uint256 amount) private {
        _transferStandard(sender, recipient, amount);
    }

    function _transferStandard(address sender, address recipient, uint256 tAmount) private {
        (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getValues(tAmount);
        _rOwned[sender] = _rOwned[sender].sub(rAmount);
        _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount); 
        _takeTeam(tTeam);
        _reflectFee(rFee, tFee);
        emit Transfer(sender, recipient, tTransferAmount);
    }

    function _takeTeam(uint256 tTeam) private {
        uint256 currentRate =  _getRate();
        uint256 rTeam = tTeam.mul(currentRate);
        _rOwned[address(this)] = _rOwned[address(this)].add(rTeam);
    }

    function _reflectFee(uint256 rFee, uint256 tFee) private {
        _rTotal = _rTotal.sub(rFee);
        _tFeeTotal = _tFeeTotal.add(tFee);
    }

    receive() external payable {}
    
    function manualswap() external {
        require(_msgSender() == dev);
        uint256 contractBalance = balanceOf(address(this));
        swapTokensForEth(contractBalance);
    }
    
    function manualsend() external {
        require(_msgSender() == dev);
        uint256 contractETHBalance = address(this).balance;
        sendETHToFee(contractETHBalance);
    }
    
    function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256, uint256) {
        (uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getTValues(tAmount, _feeAddr1, _feeAddr2);
        uint256 currentRate =  _getRate();
        (uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tTeam, currentRate);
        return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tTeam);
    }

    function _getTValues(uint256 tAmount, uint256 taxFee, uint256 TeamFee) private pure returns (uint256, uint256, uint256) {
        uint256 tFee = tAmount.mul(taxFee).div(100);
        uint256 tTeam = tAmount.mul(TeamFee).div(100);
        uint256 tTransferAmount = tAmount.sub(tFee).sub(tTeam);
        return (tTransferAmount, tFee, tTeam);
    }

    function _getRValues(uint256 tAmount, uint256 tFee, uint256 tTeam, uint256 currentRate) private pure returns (uint256, uint256, uint256) {
        uint256 rAmount = tAmount.mul(currentRate);
        uint256 rFee = tFee.mul(currentRate);
        uint256 rTeam = tTeam.mul(currentRate);
        uint256 rTransferAmount = rAmount.sub(rFee).sub(rTeam);
        return (rAmount, rTransferAmount, rFee);
    }

	function _getRate() private view returns(uint256) {
        (uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
        return rSupply.div(tSupply);
    }

    function _getCurrentSupply() private view returns(uint256, uint256) {
        uint256 rSupply = _rTotal;
        uint256 tSupply = _tTotal;      
        if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
        return (rSupply, tSupply);
    }

    function setBots(address[] memory bots_) public onlyOwner {
        for (uint i = 0; i < bots_.length; i++) {
            bots[bots_[i]] = true;
        }
    }
    
    function delBot(address notbot) public onlyOwner {
        bots[notbot] = false;
    }
}