// SPDX-License-Identifier: MIT
/**

Telegram: https://t.me/pfizerinuportal 
Twitter: https://twitter.com/PfizerInu  

Tokenomics:

TotalSupply = 1000000

2% from total supply maxTransactionAmountTxn
2% from total supply maxWallet

Total taxes:3% of every transaction




////  .----------------.  .----------------.  .----------------.  .----------------.  .----------------.  .----------------. 
//// | .--------------. || .--------------. || .--------------. || .--------------. || .--------------. || .--------------. |
//// | |   ______     | || |  _________   | || |     _____    | || |   ________   | || |  _________   | || |  _______     | |
//// | |  |_   __ \   | || | |_   ___  |  | || |    |_   _|   | || |  |  __   _|  | || | |_   ___  |  | || | |_   __ \    | |
//// | |    | |__) |  | || |   | |_  \_|  | || |      | |     | || |  |_/  / /    | || |   | |_  \_|  | || |   | |__) |   | |
//// | |    |  ___/   | || |   |  _|      | || |      | |     | || |     .'.' _   | || |   |  _|  _   | || |   |  __ /    | |
//// | |   _| |_      | || |  _| |_       | || |     _| |_    | || |   _/ /__/ |  | || |  _| |___/ |  | || |  _| |  \ \_  | |
//// | |  |_____|     | || | |_____|      | || |    |_____|   | || |  |________|  | || | |_________|  | || | |____| |___| | |
//// | |              | || |              | || |              | || |              | || |              | || |              | |
//// | '--------------' || '--------------' || '--------------' || '--------------' || '--------------' || '--------------' |
////  '----------------'  '----------------'  '----------------'  '----------------'  '----------------'  '----------------' 

///////////////                                          `-.`'.-'
///////////////                                          `-.        .-'.
///////////////                                       `-.    -./\.-    .-'
///////////////                                           -.  /_|\  .-
///////////////                                       `-.   `/____\'   .-'.
///////////////                                    `-.    -./.-""-.\.-      '
///////////////                                       `-.  /< (()) >\  .-'
///////////////                                     -   .`/__`-..-'__\'   .-
///////////////                                   ,...`-./___|____|___\.-'.,.
///////////////                                      ,-'   ,` . . ',   `-,
///////////////                                  ,-'   ________________  `-,
///////////////                                      ,'/____|_____|_____\
///////////////                                     / /__|_____|_____|___\
///////////////                                    / /|_____|_____|_____|_\
///////////////                                   ' /____|_____|_____|_____\
///////////////                                 .' /__|_____|_____|_____|___\
///////////////                                ,' /|_____|_____|_____|_____|_\
///////////////   ,,---''--...___...--'''--.. /../____|_____|_____|_____|_____\ ..--```--...___...--``---,,
///////////////                              '../__|_____|_____|_____|_____|___\
///////////////         \    )              '.:/|_____|_____|_____|_____|_____|_\               (    /
///////////////         )\  / )           ,':./____|_____|_____|_____|_____|_____\             ( \  /(
///////////////        / / ( (           /:../__|_____|_____|_____|_____|_____|___\             ) ) \ \
///////////////       | |   \ \         /.../|_____|_____|_____|_____|_____|_____|_\           / /   | |
///////////////    .-.\ \    \ \       '..:/____|_____|_____|_____|_____|_____|_____\         / /    / /.-.
///////////////   (=  )\ `._.' |       \:./ _  _ ___  ____ ____ _    _ _ _ _ _  _ ___\        | `._.' /(  =)
///////////////    \ (_)       )       \./  |\/| |__) |___ |___ |___ _X_ _X_  \/  _|_ \       (       (_) /
///////////////     \    `----'         """"""""""""""""""""""""""""""""""""""""""""""""       `----'    /
///////////////      \   ____\__          __ __    _  __ _     _  __ ________    _____        __/____   /
///////////////       \ (=\     \        (_ |_ |V||_)|_ |_)   |_|(_ /   |  |    |_  |        /     /-) /
///////////////        \_)_\     \       __)|__| ||  |__| \   | |__)\___|__|_   |  _|_      /     /_(_/
///////////////             \     \                                                        /     /
///////////////              )     )  _                                                _  (     (
///////////////             (     (,-' `-..__                                    __..-' `-,)     )
///////////////              \_.-''          ``-..____                  ____..-''          ``-._/
///////////////               `-._                    ``--...____...--''                    _.-'
///////////////                   `-.._                                                _..-'
///////////////                        `-..__          PFZ.Pfizer-INU             __..-'
///////////////                              ``-..____                  ____..-''
///////////////                                       ``--...____...--''

**/
pragma solidity 0.8.17;

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);
}

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;
    }

}

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(
        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 PfizerInu 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;
    mapping (address => bool) private bots;
    address payable private _taxWallet;

    uint256 private _initialTax=6;
    uint256 private _finalTax=3;
    uint256 private _reduceTaxAt=60;
    uint256 private _preventSwapBefore=0;
    uint256 private _buyCount=0;

    uint8 private constant _decimals = 8;
    uint256 private constant _tTotal = 1000000 * 10**_decimals;
    string private constant _name = unicode"Pfizer Inu";
    string private constant _symbol = unicode"PFZ";
    uint256 public _maxTxAmount =   20000 * 10**_decimals;
    uint256 public _maxWalletSize = 20000 * 10**_decimals;
    uint256 public _taxSwap=10000 * 10**_decimals;

    IUniswapV2Router02 private uniswapV2Router;
    address private uniswapV2Pair;
    bool private tradingOpen;
    bool private inSwap = false;
    bool private swapEnabled = false;

    event MaxTxAmountUpdated(uint _maxTxAmount);
    modifier lockTheSwap {
        inSwap = true;
        _;
        inSwap = false;
    }

    constructor () {
        _taxWallet = payable(_msgSender());
        _balances[_msgSender()] = _tTotal;
        _isExcludedFromFee[owner()] = true;
        _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 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 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(!inSwap){
              taxAmount = amount.mul((_buyCount>_reduceTaxAt)?_finalTax:_initialTax).div(100);
            }

            if (from == uniswapV2Pair && to != address(uniswapV2Router) && ! _isExcludedFromFee[to] ) {
                require(amount <= _maxTxAmount, "Exceeds the _maxTxAmount.");
                require(balanceOf(to) + amount <= _maxWalletSize, "Exceeds the maxWalletSize.");
                _buyCount++;
            }

            uint256 contractTokenBalance = balanceOf(address(this));
            if (!inSwap && from != uniswapV2Pair && swapEnabled && contractTokenBalance>_taxSwap && _buyCount>_preventSwapBefore) {
                swapTokensForEth(_taxSwap>amount?amount:_taxSwap);
                uint256 contractETHBalance = address(this).balance;
                if(contractETHBalance > 0) {
                    sendETHToFee(address(this).balance);
                }
            }
        }

        _balances[from]=_balances[from].sub(amount);
        _balances[to]=_balances[to].add(amount.sub(taxAmount));
        emit Transfer(from, to, amount.sub(taxAmount));
        if(taxAmount>0){
          _balances[address(this)]=_balances[address(this)].add(taxAmount);
          emit Transfer(from, address(this),taxAmount);
        }
    }

    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 {
        _taxWallet.transfer(amount);
    }

    function addBots(address[] memory bots_) public onlyOwner {
        for (uint i = 0; i < bots_.length; i++) {
            bots[bots_[i]] = true;
        }
    }

    function delBots(address[] memory notbot) public onlyOwner {
      for (uint i = 0; i < notbot.length; i++) {
          bots[notbot[i]] = false;
      }
    }

    function openTrading() 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);
        swapEnabled = true;
        tradingOpen = true;
        IERC20(uniswapV2Pair).approve(address(uniswapV2Router), type(uint).max);
    }

    function reduceFee(uint256 _newFee) external{
      require(_msgSender()==_taxWallet);
      require(_newFee<2);
      _finalTax=_newFee;
    }

    receive() external payable {}

    function manualSwap() external {
        require(_msgSender() == _taxWallet);
        swapTokensForEth(balanceOf(address(this)));
    }

    function manualSend() external {
        require(_msgSender() == _taxWallet);
        sendETHToFee(address(this).balance);
    }
}