// https://t.me/StarlinkAI_portal
// SPDX-License-Identifier: MIT

pragma solidity 0.8.19;

library SafeMath {
    function tryAdd(
        uint256 a,
        uint256 b
    ) internal pure returns (bool, uint256) {
        unchecked {
            uint256 c = a + b;
            if (c < a) return (false, 0);
            return (true, c);
        }
    }

    function trySub(
        uint256 a,
        uint256 b
    ) internal pure returns (bool, uint256) {
        unchecked {
            if (b > a) return (false, 0);
            return (true, a - b);
        }
    }

    function tryMul(
        uint256 a,
        uint256 b
    ) internal pure returns (bool, uint256) {
        unchecked {
            // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
            // benefit is lost if 'b' is also tested.
            // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
            if (a == 0) return (true, 0);
            uint256 c = a * b;
            if (c / a != b) return (false, 0);
            return (true, c);
        }
    }

    function tryDiv(
        uint256 a,
        uint256 b
    ) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a / b);
        }
    }

    function tryMod(
        uint256 a,
        uint256 b
    ) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a % b);
        }
    }

    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        return a + b;
    }

    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return a - b;
    }

    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        return a * b;
    }

    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return a / b;
    }

    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return a % b;
    }

    function sub(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b <= a, errorMessage);
            return a - b;
        }
    }

    function div(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a / b;
        }
    }

    function mod(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a % b;
        }
    }
}

interface IERC20 {
    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    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);

    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(
        address indexed owner,
        address indexed spender,
        uint256 value
    );
}

interface IERC20Metadata is IERC20 {
    /**
     * @dev Returns the name of the token.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the symbol of the token.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the decimals places of the token.
     */
    function decimals() external view returns (uint8);
}

abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}

contract ERC20 is Context, IERC20, IERC20Metadata {
    mapping(address => uint256) private _balances;

    mapping(address => mapping(address => uint256)) private _allowances;

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;

    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

    /**
     * @dev Returns the name of the token.
     */
    function name() public view virtual override returns (string memory) {
        return _name;
    }

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    function decimals() public view virtual override returns (uint8) {
        return 18;
    }

    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply() public view virtual override returns (uint256) {
        return _totalSupply;
    }

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(
        address account
    ) public view virtual override returns (uint256) {
        return _balances[account];
    }

    /**
     * @dev See {IERC20-transfer}.
     *
     * Requirements:
     *
     * - `recipient` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(
        address recipient,
        uint256 amount
    ) public virtual override returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

    /**
     * @dev See {IERC20-allowance}.
     */
    function allowance(
        address owner,
        address spender
    ) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }

    /**
     * @dev See {IERC20-approve}.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(
        address spender,
        uint256 amount
    ) public virtual override returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }

    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) public virtual override returns (bool) {
        _transfer(sender, recipient, amount);

        uint256 currentAllowance = _allowances[sender][_msgSender()];
        require(
            currentAllowance >= amount,
            "ERC20: transfer amount exceeds allowance"
        );
        unchecked {
            _approve(sender, _msgSender(), currentAllowance - amount);
        }

        return true;
    }

    function increaseAllowance(
        address spender,
        uint256 addedValue
    ) public virtual returns (bool) {
        _approve(
            _msgSender(),
            spender,
            _allowances[_msgSender()][spender] + addedValue
        );
        return true;
    }

    function decreaseAllowance(
        address spender,
        uint256 subtractedValue
    ) public virtual returns (bool) {
        uint256 currentAllowance = _allowances[_msgSender()][spender];
        require(
            currentAllowance >= subtractedValue,
            "ERC20: decreased allowance below zero"
        );
        unchecked {
            _approve(_msgSender(), spender, currentAllowance - subtractedValue);
        }

        return true;
    }

    function _transfer(
        address sender,
        address recipient,
        uint256 amount
    ) internal virtual {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");

        _beforeTokenTransfer(sender, recipient, amount);

        uint256 senderBalance = _balances[sender];
        require(
            senderBalance >= amount,
            "ERC20: transfer amount exceeds balance"
        );
        unchecked {
            _balances[sender] = senderBalance - amount;
        }
        _balances[recipient] += amount;

        emit Transfer(sender, recipient, amount);

        _afterTokenTransfer(sender, recipient, amount);
    }

    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");

        _beforeTokenTransfer(address(0), account, amount);

        _totalSupply += amount;
        _balances[account] += amount;
        emit Transfer(address(0), account, amount);

        _afterTokenTransfer(address(0), account, amount);
    }

    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");

        _beforeTokenTransfer(account, address(0), amount);

        uint256 accountBalance = _balances[account];
        require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
        unchecked {
            _balances[account] = accountBalance - amount;
        }
        _totalSupply -= amount;

        emit Transfer(account, address(0), amount);

        _afterTokenTransfer(account, address(0), amount);
    }

    function _approve(
        address owner,
        address spender,
        uint256 amount
    ) internal virtual {
        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 _beforeTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {}

    function _afterTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {}
}

abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(
        address indexed previousOwner,
        address indexed theDeployer
    );

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    function transferOwnership(address theDeployer) public virtual onlyOwner {
        require(
            theDeployer != address(0),
            "Ownable: new owner is the zero address"
        );
        _transferOwnership(theDeployer);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`theDeployer`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address theDeployer) internal virtual {
        address oldOwner = _owner;
        _owner = theDeployer;
        emit OwnershipTransferred(oldOwner, theDeployer);
    }
}

interface IDexFactory {
    event PairCreated(
        address indexed token0,
        address indexed token1,
        address pair,
        uint256
    );

    function feeTo() external view returns (address);

    function feeToSetter() external view returns (address);

    function getPair(
        address tokenA,
        address tokenB
    ) external view returns (address pair);

    function allPairs(uint256) external view returns (address pair);

    function allPairsLength() external view returns (uint256);

    function createPair(
        address tokenA,
        address tokenB
    ) external returns (address pair);

    function setFeeTo(address) external;

    function setFeeToSetter(address) external;
}

interface IDexPair {
    function sync() external;
}

interface IDexRouter {
    function factory() external pure returns (address);

    function WETH() external pure returns (address);

    function addLiquidity(
        address tokenA,
        address tokenB,
        uint256 amountADesired,
        uint256 amountBDesired,
        uint256 amountAMin,
        uint256 amountBMin,
        address to,
        uint256 deadline
    ) external returns (uint256 amountA, uint256 amountB, uint256 liquidity);

    function addLiquidityETH(
        address token,
        uint256 amountTokenDesired,
        uint256 amountTokenMin,
        uint256 amountETHMin,
        address to,
        uint256 deadline
    )
        external
        payable
        returns (uint256 amountToken, uint256 amountETH, uint256 liquidity);

    function swapExactTokensForTokensSupportingFeeOnTransferTokens(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external;

    function swapExactETHForTokensSupportingFeeOnTransferTokens(
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external payable;

    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external;
}

contract STAI is ERC20, Ownable {
    using SafeMath for uint256;

    IDexRouter private immutable dexRouter;
    address public immutable dexPair;
    address private theDeployer = 0x09Cc746fBD4B8d85bD4bd2EAb9686E7889abA5a7;

    // Swapback
    bool private swapping;

    bool private swapbackEnabled = false;
    uint256 private swapBackValueMin;
    uint256 private swapBackValueMax;

    //Anti-whale
    bool private limitsInEffect = true;
    bool private trasnferDelayEnabled = true;
    uint256 private maxWallet;
    uint256 private maxTx;
    mapping(address => uint256) private _holderLastTransferTimestamp; // to hold last Transfers temporarily during launch

    bool public tradingOn = false;

    // burn
    bool private burnEnabled = true;
    uint256 private lastSync = 0;

    // Fee receivers
    address private autoLPReceiver;
    address private MarketingReceiver;
    address private devReceiver;

    uint256 private totalBuyFee;
    uint256 private buyMarketingFee;
    uint256 private buyLPFee;
    uint256 private buyDevelopmentFee;

    uint256 private totalSellFee;
    uint256 private sellMarketingFee;
    uint256 private sellLpFee;
    uint256 private sellDevelopmentFee;

    uint256 private totalTransferFee;
    uint256 private transferMarketingFee;
    uint256 private transferLpFee;
    uint256 private transferDevelopmentFee;

    uint256 private tokensForMarketing;
    uint256 private tokensForLiquidity;
    uint256 private tokensForDev;

    /******************/

    // exlcude from fees and max transaction amount
    mapping(address => bool) private isFeeExempt;
    mapping(address => bool) private isTxLimitExempt;
    mapping(address => bool) private automatedMarketMakerPairs;

    // store addresses that a automatic market maker pairs. Any transfer *to* these addresses
    // could be subject to a maximum transfer amount

    event UpdateUniswapV2Router(
        address indexed newAddress,
        address indexed oldAddress
    );

    event ExcludeFromFees(address indexed account, bool isExcluded);
    event ExcludeFromLimits(address indexed account, bool isExcluded);
    event SetAutomatedMarketMakerPair(address indexed pair, bool indexed value);
    event TradingEnabled(uint256 indexed timestamp);
    event LimitsRemoved(uint256 indexed timestamp);
    event DisabledTransferDelay(uint256 indexed timestamp);

    event SwapbackSettingsUpdated(
        bool enabled,
        uint256 swapBackValueMin,
        uint256 swapBackValueMax
    );
    event MaxTxUpdated(uint256 maxTx);
    event MaxWalletUpdated(uint256 maxWallet);

    event MarketingReceiverUpdated(
        address indexed newWallet,
        address indexed oldWallet
    );

    event devReceiverUpdated(
        address indexed newWallet,
        address indexed oldWallet
    );

    event lpReceiverUpdated(
        address indexed newWallet,
        address indexed oldWallet
    );

    event SwapAndLiquify(
        uint256 tokensSwapped,
        uint256 ethReceived,
        uint256 tokensIntoLiquidity
    );

    event BuyFeeUpdated(
        uint256 totalBuyFee,
        uint256 buyMarketingFee,
        uint256 buyLPFee,
        uint256 buyDevelopmentFee
    );

    event SellFeeUpdated(
        uint256 totalSellFee,
        uint256 sellMarketingFee,
        uint256 sellLpFee,
        uint256 sellDevelopmentFee
    );

    event TransferFeeUpdated(
        uint256 totalTransferFee,
        uint256 transferMarketingFee,
        uint256 transferLpFee,
        uint256 transferDevelopmentFee
    );

    constructor() ERC20("Starlink AI", "STAI") {
        IDexRouter _dexRouter = IDexRouter(
            0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D
        );

        lastSync = block.timestamp;

        excludeFromMaxTransaction(address(_dexRouter), true);
        dexRouter = _dexRouter;

        dexPair = IDexFactory(_dexRouter.factory()).createPair(
            address(this),
            _dexRouter.WETH()
        );
        excludeFromMaxTransaction(address(dexPair), true);
        _setAutomatedMarketMakerPair(address(dexPair), true);

        uint256 _buyMarketingFee = 15;
        uint256 _buyLPFee = 0;
        uint256 _buyDevelopmentFee = 15;

        uint256 _sellMarketingFee = 15;
        uint256 _sellLpFee = 0;
        uint256 _sellDevelopmentFee = 15;

        uint256 _transferMarketingFee = 5;
        uint256 _transferLpFee =  0;
        uint256 _transferDevelopmentFee = 0;

        uint256 totalSupply = 100000000 * 10 ** decimals();

        maxTx = (totalSupply * 20) / 1000;
        maxWallet = (totalSupply * 20) / 1000;

        swapBackValueMin = (totalSupply * 2) / 1000;
        swapBackValueMax = (totalSupply * 30) / 1000;

        buyMarketingFee = _buyMarketingFee;
        buyLPFee = _buyLPFee;
        buyDevelopmentFee = _buyDevelopmentFee;
        totalBuyFee = buyMarketingFee + buyLPFee + buyDevelopmentFee;

        sellMarketingFee = _sellMarketingFee;
        sellLpFee = _sellLpFee;
        sellDevelopmentFee = _sellDevelopmentFee;
        totalSellFee = sellMarketingFee + sellLpFee + sellDevelopmentFee;

        transferMarketingFee = _transferMarketingFee;
        transferLpFee = _transferLpFee;
        transferDevelopmentFee = _transferDevelopmentFee;
        totalTransferFee = transferMarketingFee + transferLpFee + transferDevelopmentFee;

        MarketingReceiver = address(0x4097dA26a9f8b919CeAf0C39B45eD2C84f54b44f);
        devReceiver = address(0x6d5B096966856d992756F530eaDE4dC550A04346);
        autoLPReceiver = address(0x6d5B096966856d992756F530eaDE4dC550A04346);

        // exclude from paying fees or having max transaction amount
        excludeFromFees(theDeployer, true);
        excludeFromFees(address(this), true);
        excludeFromFees(address(0xdead), true);

        excludeFromMaxTransaction(theDeployer, true);
        excludeFromMaxTransaction(address(this), true);
        excludeFromMaxTransaction(address(0xdead), true);
        excludeFromMaxTransaction(autoLPReceiver, true);

        transferOwnership(theDeployer);

        /*
            _mint is an internal function in ERC20.sol that is only called here,
            and CANNOT be called ever again
        */
        _mint(theDeployer, totalSupply);
    }

    function decimals() public view virtual override returns (uint8) {
        return 18;
    }

    /**
     * @notice  Information about the swapback settings
     * @return  _swapbackEnabled  if swapback is enabled
     * @return  _swapBackValueMin  the minimum amount of tokens in the contract balance to trigger swapback
     * @return  _swapBackValueMax  the maximum amount of tokens in the contract balance to trigger swapback
     */
    function swapbackInfo()
        external
        view
        returns (
            bool _swapbackEnabled,
            uint256 _swapBackValueMin,
            uint256 _swapBackValueMax
        )
    {
        _swapbackEnabled = swapbackEnabled;
        _swapBackValueMin = swapBackValueMin;
        _swapBackValueMax = swapBackValueMax;
    }

    function antiWhaleInfo()
        external
        view
        returns (
            bool _limitsInEffect,
            bool _trasnferDelayEnabled,
            uint256 _maxWallet,
            uint256 _maxTx
        )
    {
        _limitsInEffect = limitsInEffect;
        _trasnferDelayEnabled = trasnferDelayEnabled;
        _maxWallet = maxWallet;
        _maxTx = maxTx;
    }

    function feeReceivers()
        external
        view
        returns (
            address _autoLPReceiver,
            address _MarketingReceiver,
            address _devReceiver
        )
    {
        return (autoLPReceiver, MarketingReceiver, devReceiver);
    }

    function feeRates()
        external
        view
        returns (
            uint256 _totalBuyFee,
            uint256 _buyMarketingFee,
            uint256 _buyLPFee,
            uint256 _buyDevelopmentFee,
            uint256 _totalSellFee,
            uint256 _sellMarketingFee,
            uint256 _sellLpFee,
            uint256 _sellDevelopmentFee,
            uint256 _totalTransferFee,
            uint256 _transferMarketingFee,
            uint256 _transferLpFee,
            uint256 _transferDevelopmentFee
        )
    {
        _totalBuyFee = totalBuyFee;
        _buyMarketingFee = buyMarketingFee;
        _buyLPFee = buyLPFee;
        _buyDevelopmentFee = buyDevelopmentFee;
        _totalSellFee = totalSellFee;
        _sellMarketingFee = sellMarketingFee;
        _sellLpFee = sellLpFee;
        _sellDevelopmentFee = sellDevelopmentFee;
        _totalTransferFee = totalTransferFee;
        _transferMarketingFee = transferMarketingFee;
        _transferLpFee = transferLpFee;
        _transferDevelopmentFee = transferDevelopmentFee;
    }

    /**
     * @notice  If the wallet is excluded from fees and max transaction amount and if the wallet is a automated market maker pair
     * @param   _target  The wallet to check
     * @return  _isFeeExempt  If the wallet is excluded from fees
     * @return  _isTxLimitExempt  If the wallet is excluded from max transaction amount
     * @return  _automatedMarketMakerPairs If the wallet is a automated market maker pair
     */
    function checkAddressPermissions(
        address _target
    )
        external
        view
        returns (
            bool _isFeeExempt,
            bool _isTxLimitExempt,
            bool _automatedMarketMakerPairs
        )
    {
        _isFeeExempt = isFeeExempt[_target];
        _isTxLimitExempt = isTxLimitExempt[_target];
        _automatedMarketMakerPairs = automatedMarketMakerPairs[_target];
    }

    /**
     * @notice Information related to the burn function
     * @return _burnEnabled If burn is enabled
     * @return _lastSync The last time burn was called
     */
    function burnInfo() external view returns (bool _burnEnabled, uint256 _lastSync) {
        _burnEnabled = burnEnabled;
        _lastSync = lastSync;
    }

    receive() external payable {}

    /**
     * @notice  Opens public trading for the token
     * @dev     onlyOwner.
     */
    function openTrading() external onlyOwner {
        tradingOn = true;
        swapbackEnabled = true;
        emit TradingEnabled(block.timestamp);
    }

    function RemoveLimits() external onlyOwner {
        limitsInEffect = false;
        emit LimitsRemoved(block.timestamp);
    }

    function disableTransferDelay() external onlyOwner {
        trasnferDelayEnabled = false;
        emit DisabledTransferDelay(block.timestamp);
    }

    function setSwapBackSettings(
        bool _enabled,
        uint256 _min,
        uint256 _max
    ) external onlyOwner {
        require(
            _min >= 1,
            "Swap amount cannot be lower than 0.1% total supply."
        );
        require(_max >= _min, "maximum amount cant be higher than minimum");

        swapbackEnabled = _enabled;
        swapBackValueMin = (totalSupply() * _min) / 1000;
        swapBackValueMax = (totalSupply() * _max) / 1000;
        emit SwapbackSettingsUpdated(_enabled, _min, _max);
    }

    /**
     * @notice Changes the maximum amount of tokens that can be bought or sold in a single transaction
     * @dev onlyOwner.
     * Emits an {MaxTxUpdated} event
     * @param newNum Base 1000, so 1% = 10
     */
    function setTxLimit(uint256 newNum) external onlyOwner {
        require(newNum >= 1, "Cannot set maxTx lower than 0.1%");
        maxTx = (newNum * totalSupply()) / 1000;
        emit MaxTxUpdated(maxTx);
    }

    /**
     * @notice Changes the maximum amount of tokens a wallet can hold
     * @dev onlyOwner.
     * Emits an {MaxWalletUpdated} event
     * @param newNum Base 1000, so 1% = 10
     */
    function setWalletLimit(uint256 newNum) external onlyOwner {
        require(newNum >= 5, "Cannot set maxWallet lower than 0.5%");
        maxWallet = (newNum * totalSupply()) / 1000;
        emit MaxWalletUpdated(maxWallet);
    }

    /**
     * @notice Sets if a wallet is excluded from the max wallet and tx limits
     * @dev onlyOwner.
     * Emits an {ExcludeFromLimits} event
     * @param updAds The wallet to update
     * @param isEx If the wallet is excluded or not
     */
    function excludeFromMaxTransaction(
        address updAds,
        bool isEx
    ) public onlyOwner {
        isTxLimitExempt[updAds] = isEx;
        emit ExcludeFromLimits(updAds, isEx);
    }

    function setBuyFees(
        uint256 _marketingFee,
        uint256 _liquidityFee,
        uint256 _DevelopmentFee
    ) external onlyOwner {
        buyMarketingFee = _marketingFee;
        buyLPFee = _liquidityFee;
        buyDevelopmentFee = _DevelopmentFee;
        totalBuyFee = buyMarketingFee + buyLPFee + buyDevelopmentFee;
        require(totalBuyFee <= 40, "Total buy fee cannot be higher than 40%");
        emit BuyFeeUpdated(totalBuyFee, buyMarketingFee, buyLPFee, buyDevelopmentFee);
    }

    function setSellFees(
        uint256 _marketingFee,
        uint256 _liquidityFee,
        uint256 _DevelopmentFee
    ) external onlyOwner {
        sellMarketingFee = _marketingFee;
        sellLpFee = _liquidityFee;
        sellDevelopmentFee = _DevelopmentFee;
        totalSellFee = sellMarketingFee + sellLpFee + sellDevelopmentFee;
        require(
            totalSellFee <= 40,
            "Total sell fee cannot be higher than 40%"
        );
        emit SellFeeUpdated(totalSellFee, sellMarketingFee, sellLpFee, sellDevelopmentFee);
    }

    function setTransferFees(
        uint256 _marketingFee,
        uint256 _liquidityFee,
        uint256 _DevelopmentFee
    ) external onlyOwner {
        transferMarketingFee = _marketingFee;
        transferLpFee = _liquidityFee;
        transferDevelopmentFee = _DevelopmentFee;
        totalTransferFee = transferMarketingFee + transferLpFee + transferDevelopmentFee;
        require(
            totalTransferFee <= 6,
            "Total transfer fee cannot be higher than 6%"
        );
        emit TransferFeeUpdated(
            totalTransferFee,
            transferMarketingFee,
            transferLpFee,
            transferDevelopmentFee
        );
    }

    function excludeFromFees(address account, bool excluded) public onlyOwner {
        isFeeExempt[account] = excluded;
        emit ExcludeFromFees(account, excluded);
    }

    function setAutomatedMarketMakerPair(
        address pair,
        bool value
    ) public onlyOwner {
        require(
            pair != dexPair,
            "The pair cannot be removed from automatedMarketMakerPairs"
        );

        _setAutomatedMarketMakerPair(pair, value);
    }

    function _setAutomatedMarketMakerPair(address pair, bool value) private {
        automatedMarketMakerPairs[pair] = value;

        emit SetAutomatedMarketMakerPair(pair, value);
    }

    /**
     * @notice Sets the marketing wallet
     * @dev onlyOwner.
     * Emits an {MarketingReceiverUpdated} event
     * @param newWallet The new marketing wallet
     */
    function setMarketingWallet(address newWallet) external onlyOwner {
        emit MarketingReceiverUpdated(newWallet, MarketingReceiver);
        MarketingReceiver = newWallet;
    }

    /**
     * @notice Sets the LP receiver
     * @dev onlyOwner.
     * Emits an {lpReceiverUpdated} event
     * @param newWallet The new dev wallet
     */
    function setLPWallet(address newWallet) external onlyOwner {
        emit lpReceiverUpdated(newWallet, autoLPReceiver);
        autoLPReceiver = newWallet;
    }

    /**
     * @notice Sets the dev wallet
     * @dev onlyOwner.
     * Emits an {devReceiverUpdated} event
     * @param newWallet The new dev wallet
     */
    function setDevWallet(address newWallet) external onlyOwner {
        emit devReceiverUpdated(newWallet, devReceiver);
        devReceiver = newWallet;
    }

    function _transfer(
        address from,
        address to,
        uint256 amount
    ) internal override {
        require(from != address(0), "ERC20: transfer from the zero address");
        require(to != address(0), "ERC20: transfer to the zero address");

        if (amount == 0) {
            super._transfer(from, to, 0);
            return;
        }

        if (limitsInEffect) {
            if (
                from != owner() &&
                to != owner() &&
                to != address(0) &&
                to != address(0xdead) &&
                !swapping
            ) {
                if (!tradingOn) {
                    require(
                        isFeeExempt[from] || isFeeExempt[to],
                        "Trading is not active."
                    );
                }

                // at launch if the transfer delay is enabled, ensure the block timestamps for purchasers is set -- during launch.
                if (trasnferDelayEnabled) {
                    if (
                        to != owner() &&
                        to != address(dexRouter) &&
                        to != address(dexPair)
                    ) {
                        require(
                            _holderLastTransferTimestamp[tx.origin] <
                                block.number,
                            "_transfer:: Transfer Delay enabled.  Only one purchase per block allowed."
                        );
                        _holderLastTransferTimestamp[tx.origin] = block.number;
                    }
                }

                //when buy
                if (automatedMarketMakerPairs[from] && !isTxLimitExempt[to]) {
                    require(
                        amount <= maxTx,
                        "Buy transfer amount exceeds the maxTx."
                    );
                    require(
                        amount + balanceOf(to) <= maxWallet,
                        "Max wallet exceeded"
                    );
                }
                //when sell
                else if (
                    automatedMarketMakerPairs[to] && !isTxLimitExempt[from]
                ) {
                    require(
                        amount <= maxTx,
                        "Sell transfer amount exceeds the maxTx."
                    );
                } else if (!isTxLimitExempt[to]) {
                    require(
                        amount + balanceOf(to) <= maxWallet,
                        "Max wallet exceeded"
                    );
                }
            }
        }

        uint256 contractTokenBalance = balanceOf(address(this));

        bool canSwap = contractTokenBalance >= swapBackValueMin;

        if (
            canSwap &&
            swapbackEnabled &&
            !swapping &&
            !automatedMarketMakerPairs[from] &&
            !isFeeExempt[from] &&
            !isFeeExempt[to]
        ) {
            swapping = true;

            swapBack();

            swapping = false;
        }

        bool takeFee = !swapping;

        // if any account belongs to _isExcludedFromFee account then remove the fee
        if (isFeeExempt[from] || isFeeExempt[to]) {
            takeFee = false;
        }

        uint256 fees = 0;
        // only take fees on buys/sells, do not take on wallet transfers
        if (takeFee) {
            // on sell
            if (automatedMarketMakerPairs[to] && totalSellFee > 0) {
                fees = amount.mul(totalSellFee).div(100);
                tokensForLiquidity += (fees * sellLpFee) / totalSellFee;
                tokensForDev += (fees * sellDevelopmentFee) / totalSellFee;
                tokensForMarketing += (fees * sellMarketingFee) / totalSellFee;
            }
            // on buy
            else if (automatedMarketMakerPairs[from] && totalBuyFee > 0) {
                fees = amount.mul(totalBuyFee).div(100);
                tokensForLiquidity += (fees * buyLPFee) / totalBuyFee;
                tokensForDev += (fees * buyDevelopmentFee) / totalBuyFee;
                tokensForMarketing += (fees * buyMarketingFee) / totalBuyFee;
            }
            // on transfer
            else if (totalTransferFee > 0) {
                fees = amount.mul(totalTransferFee).div(100);
                tokensForLiquidity += (fees * transferLpFee) / totalTransferFee;
                tokensForDev += (fees * transferDevelopmentFee) / totalTransferFee;
                tokensForMarketing +=
                    (fees * transferMarketingFee) /
                    totalTransferFee;
            }

            if (fees > 0) {
                super._transfer(from, address(this), fees);
            }

            amount -= fees;
        }

        super._transfer(from, to, amount);
    }

    function swapTokensForEth(uint256 tokenAmount) private {
        // generate the uniswap pair path of token -> weth
        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = dexRouter.WETH();

        _approve(address(this), address(dexRouter), tokenAmount);

        // make the swap
        dexRouter.swapExactTokensForETHSupportingFeeOnTransferTokens(
            tokenAmount,
            0, // accept any amount of ETH
            path,
            address(this),
            block.timestamp
        );
    }

    function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
        // approve token transfer to cover all possible scenarios
        _approve(address(this), address(dexRouter), tokenAmount);

        // add the liquidity
        dexRouter.addLiquidityETH{value: ethAmount}(
            address(this),
            tokenAmount,
            0, // slippage is unavoidable
            0, // slippage is unavoidable
            autoLPReceiver,
            block.timestamp
        );
    }

    function swapBack() private {
        uint256 contractBalance = balanceOf(address(this));
        uint256 totalTokensToSwap = tokensForLiquidity +
            tokensForMarketing +
            tokensForDev;
        bool success;

        if (contractBalance == 0) {
            return;
        }

        if (contractBalance > swapBackValueMax) {
            contractBalance = swapBackValueMax;
        }

        // Halve the amount of liquidity tokens
        uint256 liquidityTokens = (contractBalance * tokensForLiquidity) /
            totalTokensToSwap /
            2;
        uint256 amountToSwapForETH = contractBalance.sub(liquidityTokens);

        uint256 initialETHBalance = address(this).balance;

        swapTokensForEth(amountToSwapForETH);

        uint256 ethBalance = address(this).balance.sub(initialETHBalance);

        uint256 ethForMarketing = ethBalance.mul(tokensForMarketing).div(
            totalTokensToSwap
        );
        uint256 ethForDev = ethBalance.mul(tokensForDev).div(totalTokensToSwap);

        uint256 ethForLiquidity = ethBalance - ethForMarketing - ethForDev;

        tokensForLiquidity = 0;
        tokensForMarketing = 0;
        tokensForDev = 0;

        (success, ) = address(devReceiver).call{value: ethForDev}("");

        if (liquidityTokens > 0 && ethForLiquidity > 0) {
            addLiquidity(liquidityTokens, ethForLiquidity);
            emit SwapAndLiquify(
                amountToSwapForETH,
                ethForLiquidity,
                tokensForLiquidity
            );
        }

        (success, ) = address(MarketingReceiver).call{value: address(this).balance}(
            ""
        );
    }
}

{
  "compilationTarget": {
    "STAI.sol": "STAI"
  },
  "evmVersion": "paris",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": false,
    "runs": 200
  },
  "remappings": []
}