// File: src/Quid.sol



/**
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 *
 * LondonStockExchangeDAO ($QUID)
 * Website: https://londonstockexchangedao.com
 * Telegram: https://t.me/LSEDAO_PORTAL
 * Twitter: https://twitter.com/afewquid
 */

// SPDX-License-Identifier: NONE

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);
}

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 Quid is Context, IERC20, Ownable {
    mapping(address => uint256) private _balances;
    mapping(address => mapping(address => uint256)) private _allowances;
    mapping(address => bool) private _isExcludedFromFee;
    mapping(address => bool) private bots;
    mapping(address => uint256) private _holderLastTransferTimestamp;
    bool public transferDelayEnabled = false;
    address payable private _taxWallet;

    uint256 private _initialBuyTax = 0;
    uint256 private _initialSellTax = 6900; // 69%
    uint256 private _finalBuyTax = 0;
    uint256 private _finalSellTax = 100; // 1%
    uint256 public _reduceBuyTaxAt = 0;
    uint256 public _reduceSellTaxAt = 369;
    uint256 private _preventSwapBefore = 30;
    uint256 private _buyCount = 0;

    uint8 private constant _decimals = 18;
    uint256 private constant _tTotal = 69000000000 ether;
    string private constant _name = unicode"LondonStockExchangeDAO";
    string private constant _symbol = unicode"QUID";

    uint256 public MAX_TX_WALLET_AMOUNT_PCT = 1;
    uint256 public _maxTxAmount = (_tTotal * MAX_TX_WALLET_AMOUNT_PCT) / 100; // 1% - check!
    uint256 public _maxWalletSize = _maxTxAmount; // check!
    uint256 public _taxSwapThreshold = _maxTxAmount * 3; //check!
    uint256 public _maxTaxSwap = _taxSwapThreshold; //check!

    uint256 public immutable DAO_WALLET_PERCENT = 69; // 6.9% to DAO wallet
    address public immutable DAO_WALLET = 0x6613C1bE9C95977F2859Dd3A16593BbD615555de;
    uint256 public immutable BOND_LIQUIDITY_VAULT_PERCENT = 500; // 50% to BOND wallet
    address public immutable BOND_LIQUIDITY_VAULT = 0x921c7f26dD195ea843CDc446A8adD235764545C3;

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

    event MaxTxAmountUpdated(uint256 _maxTxAmount);

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

    constructor() {
        uint256 _daoWalletAmount = (_tTotal * DAO_WALLET_PERCENT) / 1000;
        uint256 _bondWalletAmount = (_tTotal * BOND_LIQUIDITY_VAULT_PERCENT) / 1000;
        uint256 _tTotalWithoutWallets = _tTotal - _daoWalletAmount - _bondWalletAmount;
        _taxWallet = payable(_msgSender());

        _balances[_msgSender()] = _tTotalWithoutWallets;
        _balances[DAO_WALLET] = _daoWalletAmount;
        _balances[BOND_LIQUIDITY_VAULT] = _bondWalletAmount;

        _isExcludedFromFee[owner()] = true;
        _isExcludedFromFee[address(this)] = true;
        _isExcludedFromFee[_taxWallet] = true;
        _isExcludedFromFee[DAO_WALLET] = true;
        _isExcludedFromFee[BOND_LIQUIDITY_VAULT] = true;

        emit Transfer(address(0), _msgSender(), _tTotalWithoutWallets);
        emit Transfer(address(0), DAO_WALLET, _daoWalletAmount);
        emit Transfer(address(0), BOND_LIQUIDITY_VAULT, _bondWalletAmount);
    }

    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()] - 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 _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");
        require(amount > 0, "Transfer amount must be greater than zero");
        uint256 taxAmount = 0;
        if (from != owner() && to != owner()) {
            require(!bots[from] && !bots[to]);

            if (transferDelayEnabled) {
                if (to != address(uniswapV2Router) && to != address(uniswapV2Pair)) {
                    require(
                        _holderLastTransferTimestamp[tx.origin] < block.number, "Only one transfer per block allowed."
                    );
                    _holderLastTransferTimestamp[tx.origin] = block.number;
                }
            }

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

            taxAmount = (amount * ((_buyCount > _reduceBuyTaxAt) ? _finalBuyTax : _initialBuyTax)) / 100;
            if (to == uniswapV2Pair && from != address(this)) {
                taxAmount = amount * ((_buyCount > _reduceSellTaxAt) ? _finalSellTax : _initialSellTax) / 10000;
            }
        }

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

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

    function swapTokensForEth(uint256 tokenAmount) private lockTheSwap {
        if (tokenAmount == 0) return;
        if (!tradingOpen) 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 removeLimits() external onlyOwner {
        _maxTxAmount = _tTotal;
        _maxWalletSize = _tTotal;
        transferDelayEnabled = false;
        _reduceSellTaxAt = 20;
        _reduceBuyTaxAt = 20;
        emit MaxTxAmountUpdated(_tTotal);
    }

    function sendETHToFee(uint256 amount) private {
        _taxWallet.transfer(amount);
    }

    function isBot(address a) public view returns (bool) {
        return bots[a];
    }

    function uWotM8() 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, owner(), block.timestamp
        );
        IERC20(uniswapV2Pair).approve(address(uniswapV2Router), type(uint256).max);
        swapEnabled = true;
        tradingOpen = true;
    }

    receive() external payable {}

    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);
        }
    }

    function manualWithdraw() external {
        require(_msgSender() == _taxWallet);
        uint256 tokenBalance = balanceOf(address(this));
        this.transfer(_taxWallet, tokenBalance);
    }

    function addBots(address[] memory bots_) public onlyOwner {
        for (uint256 i = 0; i < bots_.length; i++) {
            bots[bots_[i]] = true;
        }
    }

    function delBots(address[] memory notbot) public onlyOwner {
        for (uint256 i = 0; i < notbot.length; i++) {
            bots[notbot[i]] = false;
        }
    }
}