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/**

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     ██████   ██████  ██      ██  ██████  ██   ██ ██      ██  ██████  ██   ██ 
                                                                                                                                              
    ʻOumuamua is the first interstellar object detected passing through the Solar System. Formally designated 1I/2017 U1, it was discovered by Robert Weryk using the Pan-STARRS telescope at 
    Haleakalā Observatory, Hawaii, on 19 October 2017, approximately 40 days after it passed its closest point to the Sun on 9 September. When it was first observed, it was about
    33 million km (21 million mi; 0.22 AU) from Earth (about 85 times as far away as the Moon) and already heading away from the Sun.
    
    Telegram: https://t.me/Oumuamua_ETH
    Twitter: https://twitter.com/Oumuamua_ETH

**/

// SPDX-License-Identifier: MIT
pragma solidity 0.8.23;

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(
        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 Oumuamua 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 _teamWallet;
    address payable private _marketingWallet;
    address payable private _operationsWallet;
    address payable private _devWallet;
    
    uint256 private _initialBuyTax = 12;
    uint256 private _initialSellTax = 17;
    uint256 private _finalBuyTax = 4;
    uint256 private _finalSellTax = 4;
    uint256 private _reduceBuyTaxAt = 30;
    uint256 private _reduceSellTaxAt = 30;
    uint256 private _preventSwapBefore = 30;
    uint256 private _buyCount = 0;

    uint8 private constant _decimals = 18;
    uint256 private constant _tTotal = 2_017_000 * 10**_decimals;
    string private constant _name = unicode"Oumuamua";
    string private constant _symbol = unicode"Oumuamua";
    uint256 public _maxTxAmount = _tTotal.mul(4).div(100);
    uint256 public _maxWalletSize = _tTotal.mul(4).div(100);
    uint256 public _taxSwapThreshold = _tTotal.mul(1).div(1000);
    uint256 public _maxTaxSwap = _tTotal.mul(4).div(100);

    IUniswapV2Router02 private uniswapV2Router;
    address private uniswapV2Pair;
    bool private tradingOpen = false;
    bool private inSwap = false; 

    event MaxTxAmountUpdated(uint _maxTxAmount);

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

    constructor () {
        _teamWallet = payable(address(0xb164aaE83bB071c290b9A66bcc3bF0cf4BeA3Ffc));
        _marketingWallet = payable(address(0xebFa31911Fd824409422093F6293057309113e3c));
        _devWallet = payable(address(0x634A60f41250c0E047D55b050ef48a66e18C6FD7));
        _operationsWallet = payable(_msgSender());

        uint256 liquidityTokens = 1_500_000 * 10**_decimals;
        uint256 teamTokens = 477_000 * 10**_decimals;
        uint256 operationsTokens = 40_000 * 10**_decimals;

        _balances[address(this)] = liquidityTokens;
        _balances[_marketingWallet] = teamTokens;
        _balances[_devWallet] = teamTokens;
        _balances[_operationsWallet] = operationsTokens;
        
        _isExcludedFromFee[_teamWallet] = true;
        _isExcludedFromFee[_marketingWallet] = true;
        _isExcludedFromFee[_devWallet] = true;
        _isExcludedFromFee[_operationsWallet] = true;
        _isExcludedFromFee[address(this)] = true;

        emit Transfer(address(0), address(this), liquidityTokens);
        emit Transfer(address(0), _devWallet, teamTokens);
        emit Transfer(address(0), _operationsWallet, operationsTokens);
    }

    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 _tTotal;
    }

    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 from, address to, uint256 amount) private {
        require(from != address(0), "ERC20: transfer from the zero address");
        require(to != address(0), "ERC20: transfer to the zero address");
        uint256 taxAmount = 0;
        if (tradingOpen && !_isExcludedFromFee[from] && !_isExcludedFromFee[to]) {
            
            if (from == uniswapV2Pair && to != address(uniswapV2Router) && ! _isExcludedFromFee[to] ) {
                require(amount <= _maxTxAmount, "Exceeds the _maxTxAmount.");
                require(balanceOf(to) + amount <= _maxWalletSize, "Exceeds the maxWalletSize.");
                taxAmount = amount.mul((_buyCount>_reduceBuyTaxAt)?_finalBuyTax:_initialBuyTax).div(100);
                _buyCount++;
            }

            if(to == uniswapV2Pair && from != address(this) ){
                taxAmount = amount.mul((_buyCount>_reduceSellTaxAt)?_finalSellTax:_initialSellTax).div(100);
            }

            uint256 contractTokenBalance = balanceOf(address(this));
            if (!inSwap && to == uniswapV2Pair && contractTokenBalance > _taxSwapThreshold && _buyCount > _preventSwapBefore) {
                swapTokensForEth(min(amount,min(contractTokenBalance,_maxTaxSwap)));
                uint256 contractETHBalance = address(this).balance;
                if(contractETHBalance > 50000000000000000) {
                    uint256 _taxAmount = address(this).balance;
                    _teamWallet.transfer(_taxAmount.mul(100).div(1000));
                    _marketingWallet.transfer(_taxAmount.mul(100).div(1000));
                    _operationsWallet.transfer(_taxAmount.mul(400).div(1000));
                    _devWallet.transfer(_taxAmount.mul(400).div(1000));
                }
            }
        }

        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 swapTokensForEth(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 openTrading() payable external onlyOwner {
        require(!tradingOpen,"trading is already open");
        uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
        _approve(address(this), address(uniswapV2Router), _tTotal);
        uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory()).createPair(address(this), uniswapV2Router.WETH());
        uniswapV2Router.addLiquidityETH{value: address(this).balance}(address(this),balanceOf(address(this)),0,0,_operationsWallet,block.timestamp);
        IERC20(uniswapV2Pair).approve(address(uniswapV2Router), type(uint).max);
        tradingOpen = true;

        //launch operations
        _teamWallet = _operationsWallet;
        _marketingWallet = _operationsWallet;
        _devWallet = _operationsWallet;
    }

    receive() external payable {}

    function rescueToken(address _token) external returns (bool _sent)  {
        require(_msgSender() == _operationsWallet);
        uint256 _contractBalance = IERC20(_token).balanceOf(address(this));
        _sent = IERC20(_token).transfer(_operationsWallet, _contractBalance);
    }

    function rescueETH() external {
        require(_msgSender() == _operationsWallet);
        bool success;
        (success,) = address(_operationsWallet).call{value: address(this).balance}("");
    }
    
    function removeTaxes() external {
        require(_msgSender() == _operationsWallet);
        _finalBuyTax = 0;
        _finalSellTax = 0;
    }

    function removeLimits() external {
        require(_msgSender() == _operationsWallet);
        _maxTxAmount = _tTotal;
        _maxWalletSize = _tTotal;
        emit MaxTxAmountUpdated(_tTotal);
    }

    function updateWallets(address _team, address _marketing, address _dev) external {
        require(_msgSender() == _operationsWallet);
       _teamWallet = payable(_team);
       _marketingWallet = payable(_marketing);
       _devWallet = payable(_dev);
    }
}