// SPDX-License-Identifier: Unlicensed

/**
    IMPT.IO ERC Token

    Become a part of a large ecosystem that connects socially responsible brands with businesses 
    and individuals who want to reduce their carbon footprint. 
    Based on the blockchain, our platform empowers you to buy, sell, or retire carbon
    
    Telegram: https://t.me/IMPTIO
*/

pragma solidity 0.8.9;

abstract contract Context {
    function _msgSender() internal view virtual returns (address payable) {
        return payable(msg.sender);
    }

    function _msgData() internal view virtual returns (bytes memory) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}

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;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold

        return c;
    }

    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return mod(a, b, "SafeMath: modulo by zero");
    }

    function mod(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }
}

library Address {
    function isContract(address account) internal view returns (bool) {
        // According to EIP-1052, 0x0 is the value returned for not-yet created accounts
        // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
        // for accounts without code, i.e. `keccak256('')`
        bytes32 codehash;
        bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
        // solhint-disable-next-line no-inline-assembly
        assembly {
            codehash := extcodehash(account)
        }
        return (codehash != accountHash && codehash != 0x0);
    }

    function sendValue(address payable recipient, uint256 amount) internal {
        require(
            address(this).balance >= amount,
            "Address: insufficient balance"
        );

        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
        (bool success, ) = recipient.call{value: amount}("");
        require(
            success,
            "Address: unable to send value, recipient may have reverted"
        );
    }

    function functionCall(address target, bytes memory data)
        internal
        returns (bytes memory)
    {
        return functionCall(target, data, "Address: low-level call failed");
    }

    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return _functionCallWithValue(target, data, 0, errorMessage);
    }

    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value
    ) internal returns (bytes memory) {
        return
            functionCallWithValue(
                target,
                data,
                value,
                "Address: low-level call with value failed"
            );
    }

    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(
            address(this).balance >= value,
            "Address: insufficient balance for call"
        );
        return _functionCallWithValue(target, data, value, errorMessage);
    }

    function _functionCallWithValue(
        address target,
        bytes memory data,
        uint256 weiValue,
        string memory errorMessage
    ) private returns (bytes memory) {
        require(isContract(target), "Address: call to non-contract");

        (bool success, bytes memory returndata) = target.call{value: weiValue}(
            data
        );
        if (success) {
            return returndata;
        } else {
            if (returndata.length > 0) {
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

contract Ownable is Context {
    address private _owner;
    address private _previousOwner;
    uint256 private _lockTime;

    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);
    }

    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(
            newOwner != address(0),
            "Ownable: new owner is the zero address"
        );
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }

    function getUnlockTime() public view returns (uint256) {
        return _lockTime;
    }

    function getTime() public view returns (uint256) {
        return block.timestamp;
    }
}


interface IUniswapV2Factory {
    event PairCreated(
        address indexed token0,
        address indexed token1,
        address pair,
        uint256
    );

    function feeTo() external view returns (address);

    function feeToSetter() external view returns (address);

    function getPair(address tokenA, address tokenB)
        external
        view
        returns (address pair);

    function allPairs(uint256) external view returns (address pair);

    function allPairsLength() external view returns (uint256);

    function createPair(address tokenA, address tokenB)
        external
        returns (address pair);

    function setFeeTo(address) external;

    function setFeeToSetter(address) external;
}


interface IUniswapV2Pair {
    event Approval(
        address indexed owner,
        address indexed spender,
        uint256 value
    );
    event Transfer(address indexed from, address indexed to, uint256 value);

    function name() external pure returns (string memory);

    function symbol() external pure returns (string memory);

    function decimals() external pure returns (uint8);

    function totalSupply() external view returns (uint256);

    function balanceOf(address owner) external view returns (uint256);

    function allowance(address owner, address spender)
        external
        view
        returns (uint256);

    function approve(address spender, uint256 value) external returns (bool);

    function transfer(address to, uint256 value) external returns (bool);

    function transferFrom(
        address from,
        address to,
        uint256 value
    ) external returns (bool);

    function DOMAIN_SEPARATOR() external view returns (bytes32);

    function PERMIT_TYPEHASH() external pure returns (bytes32);

    function nonces(address owner) external view returns (uint256);

    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

    event Burn(
        address indexed sender,
        uint256 amount0,
        uint256 amount1,
        address indexed to
    );
    event Swap(
        address indexed sender,
        uint256 amount0In,
        uint256 amount1In,
        uint256 amount0Out,
        uint256 amount1Out,
        address indexed to
    );
    event Sync(uint112 reserve0, uint112 reserve1);

    function MINIMUM_LIQUIDITY() external pure returns (uint256);

    function factory() external view returns (address);

    function token0() external view returns (address);

    function token1() external view returns (address);

    function getReserves()
        external
        view
        returns (
            uint112 reserve0,
            uint112 reserve1,
            uint32 blockTimestampLast
        );

    function price0CumulativeLast() external view returns (uint256);

    function price1CumulativeLast() external view returns (uint256);

    function kLast() external view returns (uint256);

    function burn(address to)
        external
        returns (uint256 amount0, uint256 amount1);

    function swap(
        uint256 amount0Out,
        uint256 amount1Out,
        address to,
        bytes calldata data
    ) external;

    function skim(address to) external;

    function sync() external;

    function initialize(address, address) external;
}

interface IUniswapV2Router01 {
    function factory() external pure returns (address);

    function WETH() external pure returns (address);

    function addLiquidity(
        address tokenA,
        address tokenB,
        uint256 amountADesired,
        uint256 amountBDesired,
        uint256 amountAMin,
        uint256 amountBMin,
        address to,
        uint256 deadline
    )
        external
        returns (
            uint256 amountA,
            uint256 amountB,
            uint256 liquidity
        );

    function addLiquidityETH(
        address token,
        uint256 amountTokenDesired,
        uint256 amountTokenMin,
        uint256 amountETHMin,
        address to,
        uint256 deadline
    )
        external
        payable
        returns (
            uint256 amountToken,
            uint256 amountETH,
            uint256 liquidity
        );

    function removeLiquidity(
        address tokenA,
        address tokenB,
        uint256 liquidity,
        uint256 amountAMin,
        uint256 amountBMin,
        address to,
        uint256 deadline
    ) external returns (uint256 amountA, uint256 amountB);

    function removeLiquidityETH(
        address token,
        uint256 liquidity,
        uint256 amountTokenMin,
        uint256 amountETHMin,
        address to,
        uint256 deadline
    ) external returns (uint256 amountToken, uint256 amountETH);

    function removeLiquidityWithPermit(
        address tokenA,
        address tokenB,
        uint256 liquidity,
        uint256 amountAMin,
        uint256 amountBMin,
        address to,
        uint256 deadline,
        bool approveMax,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external returns (uint256 amountA, uint256 amountB);

    function removeLiquidityETHWithPermit(
        address token,
        uint256 liquidity,
        uint256 amountTokenMin,
        uint256 amountETHMin,
        address to,
        uint256 deadline,
        bool approveMax,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external returns (uint256 amountToken, uint256 amountETH);

    function swapExactTokensForTokens(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external returns (uint256[] memory amounts);

    function swapTokensForExactTokens(
        uint256 amountOut,
        uint256 amountInMax,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external returns (uint256[] memory amounts);

    function swapExactETHForTokens(
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external payable returns (uint256[] memory amounts);

    function swapTokensForExactETH(
        uint256 amountOut,
        uint256 amountInMax,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external returns (uint256[] memory amounts);

    function swapExactTokensForETH(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external returns (uint256[] memory amounts);

    function swapETHForExactTokens(
        uint256 amountOut,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external payable returns (uint256[] memory amounts);

    function quote(
        uint256 amountA,
        uint256 reserveA,
        uint256 reserveB
    ) external pure returns (uint256 amountB);

    function getAmountOut(
        uint256 amountIn,
        uint256 reserveIn,
        uint256 reserveOut
    ) external pure returns (uint256 amountOut);

    function getAmountIn(
        uint256 amountOut,
        uint256 reserveIn,
        uint256 reserveOut
    ) external pure returns (uint256 amountIn);

    function getAmountsOut(uint256 amountIn, address[] calldata path)
        external
        view
        returns (uint256[] memory amounts);

    function getAmountsIn(uint256 amountOut, address[] calldata path)
        external
        view
        returns (uint256[] memory amounts);
}

interface IUniswapV2Router02 is IUniswapV2Router01 {
    function removeLiquidityETHSupportingFeeOnTransferTokens(
        address token,
        uint256 liquidity,
        uint256 amountTokenMin,
        uint256 amountETHMin,
        address to,
        uint256 deadline
    ) external returns (uint256 amountETH);

    function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
        address token,
        uint256 liquidity,
        uint256 amountTokenMin,
        uint256 amountETHMin,
        address to,
        uint256 deadline,
        bool approveMax,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external returns (uint256 amountETH);

    function swapExactTokensForTokensSupportingFeeOnTransferTokens(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external;

    function swapExactETHForTokensSupportingFeeOnTransferTokens(
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external payable;

    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external;
}

contract IMPT is Context, IERC20, Ownable {
    using SafeMath for uint256;
    using Address for address;

    address payable public marketingAddress = payable(0xd49452B04dBfAC4B44a5Cf17025cB777B9069Fef); // Marketing Address
    address payable public multiSigAddress = payable(0xd49452B04dBfAC4B44a5Cf17025cB777B9069Fef); // Marketing Address
    address payable public devAddress = payable(0xd49452B04dBfAC4B44a5Cf17025cB777B9069Fef); // Dev Address
    address payable public liquidityAddress = payable(0xd49452B04dBfAC4B44a5Cf17025cB777B9069Fef); // Liquidity Address

    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 _isExcluded;
    address[] private _excluded;

    uint256 private constant MAX = ~uint256(0);
    uint256 private constant _tTotal = 1 * 1e6 * 1e18;
    uint256 private _rTotal = (MAX - (MAX % _tTotal));
    uint256 private _tFeeTotal;

    string private constant _name = unicode"IMPT.io";
    string private constant _symbol = unicode"IMPT";
    uint8 private constant _decimals = 18;

    uint256 private constant BUY = 1;
    uint256 private constant SELL = 2;
    uint256 private constant TRANSFER = 3;
    uint256 private buyOrSellSwitch;

    uint256 public manualBurnFrequency = 30 minutes;
    uint256 public lastManualLpBurnTime;

    uint256 private _taxFee;
    uint256 private _previousTaxFee = _taxFee;

    uint256 private _liquidityFee;
    uint256 private _previousLiquidityFee = _liquidityFee;

    uint256 public _buyTaxFee;
    uint256 public _buyLiquidityFee = 0;
    uint256 public _buyMultiSigFee = 0;
    uint256 public _buyMarketingFee = 10;
    uint256 public _buyDevFee = 40;

    uint256 public _sellTaxFee;
    uint256 public _sellLiquidityFee = 0;
    uint256 public _sellMultiSigFee = 0;
    uint256 public _sellMarketingFee = 10;
    uint256 public _sellDevFee = 40;

    uint256 public liquidityActiveBlock; // 0 means liquidity is not active yet
    uint256 public tradingActiveBlock; // 0 means trading is not active
    uint256 public deadBlocks;

    bool public limitsInEffect = true;
    bool public tradingActive = false;
    bool public swapEnabled = false;

    mapping (address => bool) public _isExcludedMaxTransactionAmount;

     // Anti-bot and anti-whale mappings and variables
    mapping(address => uint256) private _holderLastTransferTimestamp; // to hold last Transfers temporarily during launch
    bool public transferDelayEnabled = true;

    uint256 private _liquidityTokensToSwap;
    uint256 private _marketingTokensToSwap;
    uint256 private _devTokensToSwap;
    uint256 private _multiSigTokensToSwap;

    bool private gasLimitActive = true;
    uint256 private gasPriceLimit = 602 * 1 gwei;

    // store addresses that a automatic market maker pairs. Any transfer *to* these addresses
    // could be subject to a maximum transfer amount
    mapping (address => bool) public automatedMarketMakerPairs;
    mapping (address => bool) private _isSniper;

    uint256 public minimumTokensBeforeSwap;
    uint256 public maxTransactionAmount;
    uint256 public maxWallet;

    IUniswapV2Router02 public uniswapV2Router;
    address public uniswapV2Pair;

    bool inSwapAndLiquify;
    bool public swapAndLiquifyEnabled = false;

    event RewardLiquidityProviders(uint256 tokenAmount);
    event SwapAndLiquifyEnabledUpdated(bool enabled);
    event SwapAndLiquify(
        uint256 tokensSwapped,
        uint256 ethReceived,
        uint256 tokensIntoLiqudity
    );

    event SwapETHForTokens(uint256 amountIn, address[] path);

    event SwapTokensForETH(uint256 amountIn, address[] path);

    event ExcludedMaxTransactionAmount(address indexed account, bool isExcluded);

    event ManualBurnLP();

    modifier lockTheSwap() {
        inSwapAndLiquify = true;
        _;
        inSwapAndLiquify = false;
    }

    constructor() {
        address newOwner = msg.sender; // update if auto-deploying to a different wallet        

        deadBlocks = 0;

        maxTransactionAmount = _tTotal * 200 / 10000; // 2% max txn
        minimumTokensBeforeSwap = _tTotal * 5 / 10000; // 0.05%
        maxWallet = _tTotal * 200 / 10000; // 2%

        _rOwned[newOwner] = _rTotal;

        IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(
            // ROPSTEN or HARDHAT
            0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D
        );

        address _uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
            .createPair(address(this), _uniswapV2Router.WETH());

        uniswapV2Router = _uniswapV2Router;
        uniswapV2Pair = _uniswapV2Pair;

        _setAutomatedMarketMakerPair(_uniswapV2Pair, true);

        _isExcludedFromFee[newOwner] = true;
        _isExcludedFromFee[address(this)] = true;
        _isExcludedFromFee[liquidityAddress] = true;

        excludeFromMaxTransaction(newOwner, true);
        excludeFromMaxTransaction(address(this), true);
        excludeFromMaxTransaction(address(_uniswapV2Router), true);
        excludeFromMaxTransaction(address(0xdead), true);

        emit Transfer(address(0), newOwner, _tTotal);
    }

    function name() external pure returns (string memory) {
        return _name;
    }

    function symbol() external pure returns (string memory) {
        return _symbol;
    }

    function decimals() external pure returns (uint8) {
        return _decimals;
    }

    function totalSupply() external pure override returns (uint256) {
        return _tTotal;
    }

    function balanceOf(address account) public view override returns (uint256) {
        if (_isExcluded[account]) return _tOwned[account];
        return tokenFromReflection(_rOwned[account]);
    }

    function transfer(address recipient, uint256 amount)
        external
        override
        returns (bool)
    {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

    function allowance(address owner, address spender)
        external
        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
    ) external override returns (bool) {
        _transfer(sender, recipient, amount);
        _approve(
            sender,
            _msgSender(),
            _allowances[sender][_msgSender()].sub(
                amount,
                "ERC20: transfer amount exceeds allowance"
            )
        );
        return true;
    }

    function increaseAllowance(address spender, uint256 addedValue)
        external
        virtual
        returns (bool)
    {
        _approve(
            _msgSender(),
            spender,
            _allowances[_msgSender()][spender].add(addedValue)
        );
        return true;
    }

    function decreaseAllowance(address spender, uint256 subtractedValue)
        external
        virtual
        returns (bool)
    {
        _approve(
            _msgSender(),
            spender,
            _allowances[_msgSender()][spender].sub(
                subtractedValue,
                "ERC20: decreased allowance below zero"
            )
        );
        return true;
    }

    function isExcludedFromReward(address account)
        external
        view
        returns (bool)
    {
        return _isExcluded[account];
    }

    function totalFees() external view returns (uint256) {
        return _tFeeTotal;
    }

    // once enabled, can never be turned off
    function enableTrading(uint256 _deadBlocks) external onlyOwner {
        tradingActive = true;
        swapAndLiquifyEnabled = true;
        tradingActiveBlock = block.number;
        deadBlocks = _deadBlocks;
    }

    function isSniper(address account) public view returns (bool) {
        return _isSniper[account];
    }
    
    function manageSnipers(address[] calldata addresses, bool status) public onlyOwner {
        for (uint256 i; i < addresses.length; ++i) {
            _isSniper[addresses[i]] = status;
        }
    }

    function minimumTokensBeforeSwapAmount() external view returns (uint256) {
        return minimumTokensBeforeSwap;
    }

    function setAutomatedMarketMakerPair(address pair, bool value) public onlyOwner {
        require(pair != uniswapV2Pair, "The pair cannot be removed from automatedMarketMakerPairs");

        _setAutomatedMarketMakerPair(pair, value);
    }

    function _setAutomatedMarketMakerPair(address pair, bool value) private {
        automatedMarketMakerPairs[pair] = value;

        excludeFromMaxTransaction(pair, value);
        if(value){excludeFromReward(pair);}
        if(!value){includeInReward(pair);}
    }

    function setProtectionSettings(bool antiGas) external onlyOwner() {
        gasLimitActive = antiGas;
    }

    function setGasPriceLimit(uint256 gas) external onlyOwner {
        require(gas >= 300);
        gasPriceLimit = gas * 1 gwei;
    }

    // disable Transfer delay
    function disableTransferDelay() external onlyOwner returns (bool){
        transferDelayEnabled = false;
        return true;
    }

    function reflectionFromToken(uint256 tAmount, bool deductTransferFee)
        external
        view
        returns (uint256)
    {
        require(tAmount <= _tTotal, "Amount must be less than supply");
        if (!deductTransferFee) {
            (uint256 rAmount, , , , , ) = _getValues(tAmount);
            return rAmount;
        } else {
            (, uint256 rTransferAmount, , , , ) = _getValues(tAmount);
            return rTransferAmount;
        }
    }

    // for one-time airdrop feature after contract launch
    function airdropToWallets(address[] memory airdropWallets, uint256[] memory amount) external onlyOwner() {
        require(airdropWallets.length == amount.length, "airdropToWallets:: Arrays must be the same length");
        removeAllFee();
        buyOrSellSwitch = TRANSFER;
        for(uint256 i = 0; i < airdropWallets.length; i++){
            address wallet = airdropWallets[i];
            uint256 airdropAmount = amount[i];
            _tokenTransfer(msg.sender, wallet, airdropAmount);
        }
        restoreAllFee();
    }

    // remove limits after token is stable - 30-60 minutes
    function removeLimits() external onlyOwner returns (bool){
        limitsInEffect = false;
        gasLimitActive = false;
        transferDelayEnabled = false;
        return true;
    }

    function tokenFromReflection(uint256 rAmount)
        public
        view
        returns (uint256)
    {
        require(
            rAmount <= _rTotal,
            "Amount must be less than total reflections"
        );
        uint256 currentRate = _getRate();
        return rAmount.div(currentRate);
    }

    function excludeFromReward(address account) public onlyOwner {
        require(!_isExcluded[account], "Account is already excluded");
        require(_excluded.length + 1 <= 50, "Cannot exclude more than 50 accounts.  Include a previously excluded address.");
        if (_rOwned[account] > 0) {
            _tOwned[account] = tokenFromReflection(_rOwned[account]);
        }
        _isExcluded[account] = true;
        _excluded.push(account);
    }

    function excludeFromMaxTransaction(address updAds, bool isEx) public onlyOwner {
        _isExcludedMaxTransactionAmount[updAds] = isEx;
        emit ExcludedMaxTransactionAmount(updAds, isEx);
    }

    function includeInReward(address account) public onlyOwner {
        require(_isExcluded[account], "Account is not excluded");
        for (uint256 i = 0; i < _excluded.length; i++) {
            if (_excluded[i] == account) {
                _excluded[i] = _excluded[_excluded.length - 1];
                _tOwned[account] = 0;
                _isExcluded[account] = false;
                _excluded.pop();
                break;
            }
        }
    }

    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(!_isSniper[to], "You have no power here!");
        require(!_isSniper[from], "You have no power here!");
        require(amount > 0, "Transfer amount must be greater than zero");

        if(limitsInEffect){
            if (
                from != owner() &&
                to != owner() &&
                to != address(0) &&
                to != address(0xdead) &&
                !inSwapAndLiquify
            ){
                require(tradingActive, "Trading is not active yet");
                if((tradingActiveBlock > 0 && tradingActiveBlock + deadBlocks > block.number)){
                    _isSniper[to] = true;
                }

                // only use to prevent sniper buys in the first blocks.
                if (gasLimitActive && automatedMarketMakerPairs[from]) {
                    require(tx.gasprice <= gasPriceLimit, "Gas price exceeds limit.");
                }

                // at launch if the transfer delay is enabled, ensure the block timestamps for purchasers is set -- during launch.
                if (transferDelayEnabled){
                    if (to != owner() && to != address(uniswapV2Router) && to != address(uniswapV2Pair)){
                        require(_holderLastTransferTimestamp[tx.origin] < block.number, "_transfer:: Transfer Delay enabled.  Only one purchase per block allowed.");
                        _holderLastTransferTimestamp[tx.origin] = block.number;
                    }
                }

                //when buy
                if (automatedMarketMakerPairs[from] && !_isExcludedMaxTransactionAmount[to]) {
                    require(amount <= maxTransactionAmount, "Buy transfer amount exceeds the maxTransactionAmount.");
                    require(amount + balanceOf(to) <= maxWallet, "Cannot exceed max wallet");
                }
                //when sell
                else if (automatedMarketMakerPairs[to] && !_isExcludedMaxTransactionAmount[from]) {
                    require(amount <= maxTransactionAmount, "Sell transfer amount exceeds the maxTransactionAmount.");
                }
                else if (!_isExcludedMaxTransactionAmount[to]){
                    require(amount + balanceOf(to) <= maxWallet, "Cannot exceed max wallet");
                }
            }
        }

        uint256 contractTokenBalance = balanceOf(address(this));
        bool overMinimumTokenBalance = contractTokenBalance >= minimumTokensBeforeSwap;

        // Sell tokens for ETH
        if (
            !inSwapAndLiquify &&
            swapAndLiquifyEnabled &&
            balanceOf(uniswapV2Pair) > 0 &&
            overMinimumTokenBalance &&
            automatedMarketMakerPairs[to]
        ) {
            swapBack();
        }

        removeAllFee();

        buyOrSellSwitch = TRANSFER;

        // If any account belongs to _isExcludedFromFee account then remove the fee
        if (!_isExcludedFromFee[from] && !_isExcludedFromFee[to]) {
            // Buy
            if (automatedMarketMakerPairs[from]) {
                _taxFee = _buyTaxFee;
                
                _liquidityFee = _buyLiquidityFee + _buyMultiSigFee + _buyMarketingFee + _buyDevFee;
                if(_liquidityFee > 0){
                    buyOrSellSwitch = BUY;
                }
            }
            // Sell
            else if (automatedMarketMakerPairs[to]) {
                _taxFee = _sellTaxFee;
                _liquidityFee = _sellLiquidityFee + _sellMultiSigFee + _sellMarketingFee + _sellDevFee;
                if(_liquidityFee > 0){
                    buyOrSellSwitch = SELL;
                }
            }
        }

        _tokenTransfer(from, to, amount);

        restoreAllFee();

    }
    
    // change the minimum amount of tokens to sell from fees
    function updateSwapTokensAtPercent(uint256 percent) external onlyOwner returns (bool){
  	    require(percent >= 1, "Swap amount cannot be lower than 0.001% total supply.");
  	    require(percent <= 50, "Swap amount cannot be higher than 0.5% total supply.");
  	    minimumTokensBeforeSwap = _tTotal * percent / 10000;
  	    return true;
  	}

    function updateMaxTxnPercent(uint256 percent) external onlyOwner {
        require(percent >= 10, "Cannot set maxTransactionAmount lower than 0.1%");
        maxTransactionAmount = _tTotal * percent / 10000;
    }

    // percent 25 for .25%
    function manualBurnLiquidityPairTokens(uint256 percent) external onlyOwner returns (bool){
        require(block.timestamp > lastManualLpBurnTime + manualBurnFrequency , "Must wait for cooldown to finish");
        require(percent <= 1000, "May not nuke more than 10% of tokens in LP");
        lastManualLpBurnTime = block.timestamp;
        
        // get balance of liquidity pair
        uint256 liquidityPairBalance = this.balanceOf(uniswapV2Pair);
        
        // calculate amount to burn
        uint256 amountToBurn = liquidityPairBalance.mul(percent).div(10000);
        
        // pull tokens from pancakePair liquidity and move to dead address permanently
        if (amountToBurn > 0){
            _transfer(uniswapV2Pair, address(0xdead), amountToBurn);
        }
        
        //sync price since this is not in a swap transaction!
        IUniswapV2Pair pair = IUniswapV2Pair(uniswapV2Pair);
        pair.sync();
        emit ManualBurnLP();
        return true;
    }

    function swapBack() private lockTheSwap {
        uint256 contractBalance = balanceOf(address(this));
        bool success;
        uint256 totalTokensToSwap = _liquidityTokensToSwap + _devTokensToSwap + _multiSigTokensToSwap + _marketingTokensToSwap;
        if(totalTokensToSwap == 0 || contractBalance == 0) {return;}

        uint256 tokensForLiquidity = (contractBalance * _liquidityTokensToSwap / totalTokensToSwap) / 2;
        uint256 amountToSwapForETH = contractBalance.sub(tokensForLiquidity);

        uint256 initialETHBalance = address(this).balance;

        swapTokensForETH(amountToSwapForETH);

        uint256 ethBalance = address(this).balance.sub(initialETHBalance);

        uint256 ethForMarketing = ethBalance.mul(_marketingTokensToSwap).div(totalTokensToSwap);

        uint256 ethForDev = ethBalance.mul(_devTokensToSwap).div(totalTokensToSwap);

        uint256 ethForMultiSig = ethBalance.mul(_multiSigTokensToSwap).div(totalTokensToSwap);

        uint256 ethForLiquidity = ethBalance - ethForMarketing;

        _liquidityTokensToSwap = 0;
        _devTokensToSwap = 0;
        _multiSigTokensToSwap = 0;
        _marketingTokensToSwap = 0;

        if(tokensForLiquidity > 0 && ethForLiquidity > 0){
            addLiquidity(tokensForLiquidity, ethForLiquidity);
            emit SwapAndLiquify(amountToSwapForETH, ethForLiquidity, tokensForLiquidity);
        }

        address(marketingAddress).call{value: ethForMarketing}("");
        address(multiSigAddress).call{value: ethForMultiSig}("");
        (success,) = address(devAddress).call{value: address(this).balance}("");
    }

    function swapTokensForETH(uint256 tokenAmount) private {
        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = uniswapV2Router.WETH();
        _approve(address(this), address(uniswapV2Router), tokenAmount);
        uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
            tokenAmount,
            0, // accept any amount of ETH
            path,
            address(this),
            block.timestamp
        );
    }

    function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
        _approve(address(this), address(uniswapV2Router), tokenAmount);
        uniswapV2Router.addLiquidityETH{value: ethAmount}(
            address(this),
            tokenAmount,
            0, // slippage is unavoidable
            0, // slippage is unavoidable
            liquidityAddress,
            block.timestamp
        );
    }

    function _tokenTransfer(
        address sender,
        address recipient,
        uint256 amount
    ) private {

        if (_isExcluded[sender] && !_isExcluded[recipient]) {
            _transferFromExcluded(sender, recipient, amount);
        } else if (!_isExcluded[sender] && _isExcluded[recipient]) {
            _transferToExcluded(sender, recipient, amount);
        } else if (_isExcluded[sender] && _isExcluded[recipient]) {
            _transferBothExcluded(sender, recipient, amount);
        } else {
            _transferStandard(sender, recipient, amount);
        }
    }

    function _transferStandard(
        address sender,
        address recipient,
        uint256 tAmount
    ) private {
        (
            uint256 rAmount,
            uint256 rTransferAmount,
            uint256 rFee,
            uint256 tTransferAmount,
            uint256 tFee,
            uint256 tLiquidity
        ) = _getValues(tAmount);
        _rOwned[sender] = _rOwned[sender].sub(rAmount);
        _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
        _takeLiquidity(tLiquidity);
        _reflectFee(rFee, tFee);
        emit Transfer(sender, recipient, tTransferAmount);
    }

    function _transferToExcluded(
        address sender,
        address recipient,
        uint256 tAmount
    ) private {
        (
            uint256 rAmount,
            uint256 rTransferAmount,
            uint256 rFee,
            uint256 tTransferAmount,
            uint256 tFee,
            uint256 tLiquidity
        ) = _getValues(tAmount);
        _rOwned[sender] = _rOwned[sender].sub(rAmount);
        _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
        _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
        _takeLiquidity(tLiquidity);
        _reflectFee(rFee, tFee);
        emit Transfer(sender, recipient, tTransferAmount);
    }

    function _transferFromExcluded(
        address sender,
        address recipient,
        uint256 tAmount
    ) private {
        (
            uint256 rAmount,
            uint256 rTransferAmount,
            uint256 rFee,
            uint256 tTransferAmount,
            uint256 tFee,
            uint256 tLiquidity
        ) = _getValues(tAmount);
        _tOwned[sender] = _tOwned[sender].sub(tAmount);
        _rOwned[sender] = _rOwned[sender].sub(rAmount);
        _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
        _takeLiquidity(tLiquidity);
        _reflectFee(rFee, tFee);
        emit Transfer(sender, recipient, tTransferAmount);
    }

    function _transferBothExcluded(
        address sender,
        address recipient,
        uint256 tAmount
    ) private {
        (
            uint256 rAmount,
            uint256 rTransferAmount,
            uint256 rFee,
            uint256 tTransferAmount,
            uint256 tFee,
            uint256 tLiquidity
        ) = _getValues(tAmount);
        _tOwned[sender] = _tOwned[sender].sub(tAmount);
        _rOwned[sender] = _rOwned[sender].sub(rAmount);
        _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
        _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
        _takeLiquidity(tLiquidity);
        _reflectFee(rFee, tFee);
        emit Transfer(sender, recipient, tTransferAmount);
    }

    function _reflectFee(uint256 rFee, uint256 tFee) private {
        _rTotal = _rTotal.sub(rFee);
        _tFeeTotal = _tFeeTotal.add(tFee);
    }

    function _getValues(uint256 tAmount)
        private
        view
        returns (
            uint256,
            uint256,
            uint256,
            uint256,
            uint256,
            uint256
        )
    {
        (
            uint256 tTransferAmount,
            uint256 tFee,
            uint256 tLiquidity
        ) = _getTValues(tAmount);
        (uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(
            tAmount,
            tFee,
            tLiquidity,
            _getRate()
        );
        return (
            rAmount,
            rTransferAmount,
            rFee,
            tTransferAmount,
            tFee,
            tLiquidity
        );
    }

    function _getTValues(uint256 tAmount)
        private
        view
        returns (
            uint256,
            uint256,
            uint256
        )
    {
        uint256 tFee = calculateTaxFee(tAmount);
        uint256 tLiquidity = calculateLiquidityFee(tAmount);
        uint256 tTransferAmount = tAmount.sub(tFee).sub(tLiquidity);
        return (tTransferAmount, tFee, tLiquidity);
    }

    function _getRValues(
        uint256 tAmount,
        uint256 tFee,
        uint256 tLiquidity,
        uint256 currentRate
    )
        private
        pure
        returns (
            uint256,
            uint256,
            uint256
        )
    {
        uint256 rAmount = tAmount.mul(currentRate);
        uint256 rFee = tFee.mul(currentRate);
        uint256 rLiquidity = tLiquidity.mul(currentRate);
        uint256 rTransferAmount = rAmount.sub(rFee).sub(rLiquidity);
        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;
        for (uint256 i = 0; i < _excluded.length; i++) {
            if (
                _rOwned[_excluded[i]] > rSupply ||
                _tOwned[_excluded[i]] > tSupply
            ) return (_rTotal, _tTotal);
            rSupply = rSupply.sub(_rOwned[_excluded[i]]);
            tSupply = tSupply.sub(_tOwned[_excluded[i]]);
        }
        if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
        return (rSupply, tSupply);
    }

    function _takeLiquidity(uint256 tLiquidity) private {
        if(buyOrSellSwitch == BUY){
            _liquidityTokensToSwap += tLiquidity * _buyLiquidityFee / _liquidityFee;
            _devTokensToSwap += tLiquidity * _buyDevFee / _liquidityFee;
            _marketingTokensToSwap += tLiquidity * _buyMarketingFee / _liquidityFee;
            _multiSigTokensToSwap += tLiquidity * _buyMultiSigFee / _liquidityFee;
        } else if(buyOrSellSwitch == SELL){
            _liquidityTokensToSwap += tLiquidity * _sellLiquidityFee / _liquidityFee;
            _devTokensToSwap += tLiquidity * _sellDevFee / _liquidityFee;
            _marketingTokensToSwap += tLiquidity * _sellMarketingFee / _liquidityFee;
            _multiSigTokensToSwap += tLiquidity * _sellMultiSigFee / _liquidityFee;
        }
        
        uint256 currentRate = _getRate();
        uint256 rLiquidity = tLiquidity.mul(currentRate);
        _rOwned[address(this)] = _rOwned[address(this)].add(rLiquidity);
        if (_isExcluded[address(this)])
            _tOwned[address(this)] = _tOwned[address(this)].add(tLiquidity);
    }

    function calculateTaxFee(uint256 _amount) private view returns (uint256) {
        return _amount.mul(_taxFee).div(10**3);
    }

    function calculateLiquidityFee(uint256 _amount)
        private
        view
        returns (uint256)
    {
        return _amount.mul(_liquidityFee).div(10**3);
    }

    function removeAllFee() private {
        if (_taxFee == 0 && _liquidityFee == 0) return;

        _previousTaxFee = _taxFee;
        _previousLiquidityFee = _liquidityFee;

        _taxFee = 0;
        _liquidityFee = 0;
    }

    function restoreAllFee() private {
        _taxFee = _previousTaxFee;
        _liquidityFee = _previousLiquidityFee;
    }

    function isExcludedFromFee(address account) external view returns (bool) {
        return _isExcludedFromFee[account];
    }

    function excludeFromFee(address account) external onlyOwner {
        _isExcludedFromFee[account] = true;
    }

    function includeInFee(address account) external onlyOwner {
        _isExcludedFromFee[account] = false;
    }

    function setBuyFee(uint256 buyTaxFee, uint256 buyLiquidityFee, uint256 buyDevFee, uint256 buyMultiSigFee, uint256 buyMarketingFee)
        external
        onlyOwner
    {
        _buyTaxFee = buyTaxFee;
        _buyLiquidityFee = buyLiquidityFee;
        _buyMultiSigFee = buyMultiSigFee;
        _buyDevFee = buyDevFee;
        _buyMarketingFee = buyMarketingFee;
        require(_buyTaxFee + _buyLiquidityFee + _buyMultiSigFee + _buyDevFee + _buyMarketingFee <= 150, "Must keep taxes below 15%");
    }

    function setSellFee(uint256 sellTaxFee, uint256 sellLiquidityFee, uint256 sellDevFee, uint256 sellMultiSigFee, uint256 sellMarketingFee)
        external
        onlyOwner
    {
        _sellTaxFee = sellTaxFee;
        _sellLiquidityFee = sellLiquidityFee;
        _sellMultiSigFee = sellMultiSigFee;
        _sellDevFee = sellDevFee;
        _sellMarketingFee = sellMarketingFee;
        require(_sellTaxFee + _sellLiquidityFee + _sellMultiSigFee + _sellDevFee + _sellMarketingFee <= 250, "Must keep taxes below 25%");
    }

    function updateMaxSize(uint256 percent) external onlyOwner {
        maxWallet = _tTotal * percent / 10000; // 300 = 3%
        maxTransactionAmount = _tTotal * percent / 10000;
    }

    function setMarketingAddress(address _marketingAddress) external onlyOwner {
        marketingAddress = payable(_marketingAddress);
        _isExcludedFromFee[marketingAddress] = true;
    }

    function setDevAddress(address _devAddress) external onlyOwner {
        devAddress = payable(_devAddress);
        _isExcludedFromFee[devAddress] = true;
    }

    function setMultiSigAddress(address _multiSigAddress) external onlyOwner {
        multiSigAddress = payable(_multiSigAddress);
        _isExcludedFromFee[multiSigAddress] = true;
    }

    function setLiquidityAddress(address _liquidityAddress) external onlyOwner {
        liquidityAddress = payable(_liquidityAddress);
        _isExcludedFromFee[liquidityAddress] = true;
    }

    function setSwapAndLiquifyEnabled(bool _enabled) public onlyOwner {
        swapAndLiquifyEnabled = _enabled;
        emit SwapAndLiquifyEnabledUpdated(_enabled);
    }
    
    // useful for buybacks or to reclaim any ETH on the contract in a way that helps holders.
    function buyBackTokens(uint256 ethAmountInWei) external onlyOwner {
        // generate the uniswap pair path of weth -> eth
        address[] memory path = new address[](2);
        path[0] = uniswapV2Router.WETH();
        path[1] = address(this);

        // make the swap
        uniswapV2Router.swapExactETHForTokensSupportingFeeOnTransferTokens{value: ethAmountInWei}(
            0, // accept any amount of Token
            path,
            address(0xdead),
            block.timestamp
        );
    }

    // To receive ETH from uniswapV2Router when swapping
    receive() external payable {}

    function transferForeignToken(address _token, address _to)
        external
        onlyOwner
        returns (bool _sent)
    {
        require(_token != address(this), "Can't withdraw native tokens");
        uint256 _contractBalance = IERC20(_token).balanceOf(address(this));
        _sent = IERC20(_token).transfer(_to, _contractBalance);
    }

    function manualSend(address _recipient) external onlyOwner {
        uint256 contractETHBalance = address(this).balance;
        (bool success, ) = _recipient.call{ value: contractETHBalance }("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }
}