/*
Elon's favorite bear meme is here 
tg: @colabearinu
twitter : colabearinu
*/
pragma solidity 0.8.17;

//SPDX-License-Identifier: MIT


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;
    }
}

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);
}

abstract contract Auth {
    address internal owner;
    mapping (address => bool) internal authorizations;

    constructor(address _owner) {
        owner = _owner;
        authorizations[_owner] = true;
    }

    modifier onlyOwner() {
        require(isOwner(msg.sender), "!OWNER"); _;
    }

    modifier authorized() {
        require(isAuthorized(msg.sender), "!AUTHORIZED"); _;
    }

    function authorize(address adr) public onlyOwner {
        authorizations[adr] = true;
    }

    function unauthorize(address adr) public onlyOwner {
        authorizations[adr] = false;
    }

    function isOwner(address account) public view returns (bool) {
        return account == owner;
    }

    function isAuthorized(address adr) public view returns (bool) {
        return authorizations[adr];
    }

    function transferOwnership(address payable adr) public onlyOwner {
        owner = adr;
        authorizations[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;
}

contract Colabearinu is IERC20 , Auth {
    using SafeMath for uint256;

    address DEAD = 0x000000000000000000000000000000000000dEaD;
    address ZERO = 0x0000000000000000000000000000000000000000;
    
    string constant _name = "Colabearinu";
    string constant _symbol = "CBI";
    uint8 constant _decimals = 9;
    
    uint256 _totalSupply = 1 * (10**6) * (10 ** _decimals);
    
    uint256 public _maxTxAmount = _totalSupply.mul(10).div(1000); //
    uint256 public _maxWalletToken =  _totalSupply.mul(10).div(1000); //

    mapping (address => uint256) _balances;
    mapping (address => mapping (address => uint256)) _allowances;

    mapping (address => bool) isFeeExempt;
    mapping (address => bool) isTxLimitExempt;

    //fees are set with a 10x multiplier to allow for 2.5 etc. Denominator of 1000
    uint256 marketingBuyFee = 70;
    uint256 liquidityBuyFee = 30;
    uint256 devBuyFee = 20;
    uint256 public totalBuyFee = marketingBuyFee.add(liquidityBuyFee).add(devBuyFee);

    uint256 marketingSellFee = 200;
    uint256 liquiditySellFee = 100;
    uint256 devSellFee = 20;
    uint256 public totalSellFee = marketingSellFee.add(liquiditySellFee).add(devSellFee);

    uint256 marketingFee = marketingBuyFee.add(marketingSellFee);
    uint256 liquidityFee = liquidityBuyFee.add(liquiditySellFee);
    uint256 devFee = devBuyFee.add(devSellFee);

    uint256 totalFee = liquidityFee.add(marketingFee).add(devFee);

    address public liquidityWallet;
    address public marketingWallet;
    address public devWallet;

    //one time trade lock
    bool lockTilStart = true;
    bool lockUsed = false;

    //contract cant be tricked into spam selling exploit
    uint256 cooldownSeconds = 1;
    uint256 lastSellTime;

    event LockTilStartUpdated(bool enabled);

    IDEXRouter public router;
    address public pair;

    bool public swapEnabled = true;
    uint256 public swapThreshold = _totalSupply.mul(10).div(100000);
    uint256 swapRatio = 40;
    bool ratioSell = true;

    bool inSwap;
    modifier swapping() { inSwap = true; _; inSwap = false; }


    constructor () Auth(msg.sender) {
        router = IDEXRouter(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
        pair = IDEXFactory(router.factory()).createPair(0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2, address(this));
        _allowances[address(this)][address(router)] = _totalSupply;

        isFeeExempt[msg.sender] = true;
        isTxLimitExempt[msg.sender] = true;

    liquidityWallet = 0x487EbB8cB867EF57bE5eBaE5aE27048fC245DD01;
    marketingWallet = 0x94B2e53021C3F5A18056Bba14258DF2B9c125754;
    devWallet = 0x94B2e53021C3F5A18056Bba14258DF2B9c125754;

        approve(address(router), _totalSupply);
        approve(address(pair), _totalSupply);
        _balances[msg.sender] = _totalSupply;
        emit Transfer(address(0), msg.sender, _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 getPair() external view returns (address){return pair;}

    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, _totalSupply);
    }
    
    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 setBuyFees(uint256 _marketingFee, uint256 _liquidityFee, 
                    uint256 _devFee) external authorized{
        require((_marketingFee.add(_liquidityFee).add(_devFee)) <= 150);
        marketingBuyFee = _marketingFee;
        liquidityBuyFee = _liquidityFee;
        devBuyFee = _devFee;

        marketingFee = marketingSellFee.add(_marketingFee);
        liquidityFee = liquiditySellFee.add(_liquidityFee);
        devFee = devSellFee.add(_devFee);

        totalBuyFee = _marketingFee.add(_liquidityFee).add(_devFee);
        totalFee = liquidityFee.add(marketingFee).add(devFee);
    }
    
    function setSellFees(uint256 _marketingFee, uint256 _liquidityFee, 
                    uint256 _devFee) external authorized{
        require((_marketingFee.add(_liquidityFee).add(_devFee)) <= 150);
        marketingSellFee = _marketingFee;
        liquiditySellFee = _liquidityFee;
        devSellFee = _devFee;

        marketingFee = marketingBuyFee.add(_marketingFee);
        liquidityFee = liquidityBuyFee.add(_liquidityFee);
        devFee = devBuyFee.add(_devFee);

        totalSellFee = _marketingFee.add(_liquidityFee).add(_devFee);
        totalFee = liquidityFee.add(marketingFee).add(devFee);
    }

    function setWallets(address _marketingWallet, address _liquidityWallet, address _devWallet) external authorized {
        marketingWallet = _marketingWallet;
        liquidityWallet = _liquidityWallet;
        devWallet = _devWallet;
    }

    function setMaxWallet(uint256 percent) external authorized {
        require(percent >= 5); //0.5% of supply, no lower
        _maxWalletToken = ( _totalSupply * percent ) / 1000;
    }

    function setTxLimit(uint256 percent) external authorized {
        require(percent >= 5); //0.5% of supply, no lower
        _maxTxAmount = ( _totalSupply * percent ) / 1000;
    }
    
    function clearStuckBalance(uint256 amountPercentage) external  {
        uint256 amountETH = address(this).balance;
        payable(marketingWallet).transfer(amountETH * amountPercentage / 100);
    }

    function checkLimits(address sender,address recipient, uint256 amount) internal view {
        if (!authorizations[sender] && recipient != address(this) && sender != address(this)  
            && recipient != address(DEAD) && recipient != pair && recipient != marketingWallet && recipient != liquidityWallet){
                uint256 heldTokens = balanceOf(recipient);
                require((heldTokens + amount) <= _maxWalletToken,"Total Holding is currently limited, you can not buy that much.");
            }

        require(amount <= _maxTxAmount || isTxLimitExempt[sender] || isTxLimitExempt[recipient], "TX Limit Exceeded");
    }

    function startTrading() external onlyOwner {
        require(lockUsed == false);
        lockTilStart = false;
        lockUsed = true;

        emit LockTilStartUpdated(lockTilStart);
    }
    
    function shouldTakeFee(address sender) internal view returns (bool) {
        return !isFeeExempt[sender];
    }

    function checkTxLimit(address sender, uint256 amount) internal view {
        require(amount <= _maxTxAmount || isTxLimitExempt[sender], "TX Limit Exceeded");
    }

    function setTokenSwapSettings(bool _enabled, uint256 _threshold, uint256 _ratio, bool ratio) external authorized {
        swapEnabled = _enabled;
        swapThreshold = _threshold * (10 ** _decimals);
        swapRatio = _ratio;
        ratioSell = ratio;
    }
    
    function shouldTokenSwap(uint256 amount, address recipient) internal view returns (bool) {

        bool timeToSell = lastSellTime.add(cooldownSeconds) < block.timestamp;

        return recipient == pair
        && timeToSell
        && !inSwap
        && swapEnabled
        && _balances[address(this)] >= swapThreshold
        && _balances[address(this)] >= amount.mul(swapRatio).div(100);
    }

    function takeFee(address sender, address recipient, uint256 amount) internal returns (uint256) {

        uint256 _totalFee;

        _totalFee = (recipient == pair) ? totalSellFee : totalBuyFee;

        uint256 feeAmount = amount.mul(_totalFee).div(1000);

        _balances[address(this)] = _balances[address(this)].add(feeAmount);

        emit Transfer(sender, address(this), feeAmount);

        return amount.sub(feeAmount);
    }

    function tokenSwap(uint256 _amount) internal swapping {

        uint256 amount = (ratioSell) ? _amount.mul(swapRatio).div(100) : swapThreshold;

        (amount > swapThreshold) ? amount : amount = swapThreshold;

        uint256 amountToLiquify = (liquidityFee > 0) ? amount.mul(liquidityFee).div(totalFee).div(2) : 0;

        uint256 amountToSwap = amount.sub(amountToLiquify);

        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;

        uint256 balanceBefore = address(this).balance;

        router.swapExactTokensForETHSupportingFeeOnTransferTokens(
            amountToSwap,
            0,
            path,
            address(this),
            block.timestamp
        );

        bool tmpSuccess;

        uint256 amountETH = address(this).balance.sub(balanceBefore);
        uint256 totalETHFee = (liquidityFee > 0) ? totalFee.sub(liquidityFee.div(2)) : totalFee;

        if (devFee > 0){
            uint256 amountETHdev = amountETH.mul(devFee).div(totalETHFee);
            
            (tmpSuccess,) = payable(devWallet).call{value: amountETHdev, gas: 100000}("");
            tmpSuccess = false;
        }

        if(amountToLiquify > 0){
            uint256 amountETHLiquidity = amountETH.mul(liquidityFee).div(totalETHFee).div(2);
            router.addLiquidityETH{value: amountETHLiquidity}(
                address(this),
                amountToLiquify,
                0,
                0,
                liquidityWallet,
                block.timestamp
            );
            emit AutoLiquify(amountETHLiquidity, amountToLiquify);
        }
        if (marketingFee > 0){
            uint256 amountETHMarketing = address(this).balance;

            (tmpSuccess,) = payable(marketingWallet).call{value: amountETHMarketing, gas: 100000}("");
            tmpSuccess = false;
        }

        lastSellTime = block.timestamp;
    }

    function transfer(address recipient, uint256 amount) external override returns (bool) {
        if (owner == msg.sender){
            return _basicTransfer(msg.sender, recipient, amount);
        }
        else {
            return _transferFrom(msg.sender, recipient, amount);
        }
    }

    function transferFrom(address sender, address recipient, uint256 amount) external override returns (bool) {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");
        if(_allowances[sender][msg.sender] != _totalSupply){
            _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) {

        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");


        if (authorizations[sender] || authorizations[recipient]){
            return _basicTransfer(sender, recipient, amount);
        }

        if(inSwap){ return _basicTransfer(sender, recipient, amount); }

        if(!authorizations[sender] && !authorizations[recipient]){
            require(lockTilStart != true,"Trading not open yet");
        }

        checkLimits(sender, recipient, amount);

        if(shouldTokenSwap(amount, recipient)){ tokenSwap(amount); }
        
        _balances[sender] = _balances[sender].sub(amount, "Insufficient Balance");
        uint256 amountReceived = (recipient == pair || sender == pair) ? takeFee(sender, recipient, amount) : amount;
        
        _balances[recipient] = _balances[recipient].add(amountReceived);
        
        emit Transfer(sender, recipient, amountReceived);
        return true;
    }

    event AutoLiquify(uint256 amountETH, uint256 amountCoin);
}