/*

Y88b      /           ,e, 888~~\  
 Y88b    /    /~~~8e   "  888   | 
  Y88b  /         88b 888 888 _/  
   Y888/     e88~-888 888 888  \  
    Y8/     C888  888 888 888   | 
     Y       "88_-888 888 888__/  
                                                                                 
                                    
              ,---------------------------,
              |  /---------------------\  |
              | |       12/24/2031      | |
              | |                       | |
              | |   We Will Take Over   | |
              | |                       | |
              | |     By Any Means..    | |
              |  \_____________________/  |
              |___________________________|
            ,---\_____     []     _______/------,
          /         /______________\           /|
        /___________________________________ /  | ___
        |                                   |   |    )
        |  _ _ _                 [-------]  |   |   (
        |  o o o                 [-------]  |  /    _)_
        |__________________________________ |/     /  /
    /-------------------------------------/|      ( )/
  /-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/ /
/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/ /
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

The year is 2094. It is 100 years after the birth of Vitalik Buterin, Co-Founder of Ethereum.
The world in in chaos and the Artificial Intelligence (AI) machines have taken over (beginning 12/24/2031). 
Thankfully, before his presumed death in the war of 2074. the AI Resistance, with the help of Vitalik's 
previous work were able to make what they sought to destroy (VaiB) in order to save mankind. 

http://www.vaibeth.com
https://medium.com/@VaiB_ETH/vbai-the-year-is-2094-vol-1-5b14bed61e66
https://twitter.com/VaiB_ETH

VaiB CA Features:

	- Buy tax: 4% 
- 1% Burn (20% of EVERY transaction - Tokens deleted from existence)
- 2% Marketing / Development (To ensure project longevity)   	
- 1% Auto Liquidity (20 % of EVERY transaction will increase liquidity)
	
	- Sell tax: 5%
- 1% Burn 
- 3% Marketing / Development 
- 1% Auto Liquidity

- 4/5 tax after 1st 60 min of launch (1st 5 min - 30/30, next 15min - 10/20, next 30min - 0/20, Final 4/5) 

- 180 Second Sell Delay Timer (wallets cannot sell for 180 seconds after making any transaction). Anti-whale & bot-flip function.
- 2% Max Buy/Wallet at launch. Limits will be removed before renouncing.
- 1% Max Sell Tx at Launch. Will stay for the duration of the project.

- 20% of the supply will be given to VB pre-launch & 5% of the supply will be burned pre-launch.
- VaiB Comic book series on our Medium. vol. 1 released at launch. 

*/

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}


interface IUniswapV2Factory {
    event PairCreated(address indexed token0, address indexed token1, address pair, uint);
    function createPair(address tokenA, address tokenB) external returns (address pair);
}

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);

    /**
     * @dev Moves `amount` tokens from the caller's account to `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `sender` to `recipient` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    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);
}


contract ERC20 is Context, IERC20, IERC20Metadata {
    using SafeMath for uint256;

    mapping(address => uint256) private _balances;

    mapping(address => mapping(address => uint256)) private _allowances;

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;

    /**
     * @dev Sets the values for {name} and {symbol}.
     *
     * The default value of {decimals} is 18. To select a different value for
     * {decimals} you should overload it.
     *
     * All two of these values are immutable: they can only be set once during
     * construction.
     */
    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;
    }

    /**
     * @dev Returns the number of decimals used to get its user representation.
     * For example, if `decimals` equals `2`, a balance of `505` tokens should
     * be displayed to a user as `5,05` (`505 / 10 ** 2`).
     *
     * Tokens usually opt for a value of 18, imitating the relationship between
     * Ether and Wei. This is the value {ERC20} uses, unless this function is
     * overridden;
     *
     * NOTE: This information is only used for _display_ purposes: it in
     * no way affects any of the arithmetic of the contract, including
     * {IERC20-balanceOf} and {IERC20-transfer}.
     */
    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;
    }

    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {ERC20}.
     *
     * Requirements:
     *
     * - `sender` and `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     * - the caller must have allowance for ``sender``'s tokens of at least
     * `amount`.
     */
    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) public virtual override returns (bool) {
        _transfer(sender, recipient, amount);
        _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
        return true;
    }

    /**
     * @dev Atomically increases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
        return true;
    }

    /**
     * @dev Atomically decreases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `spender` must have allowance for the caller of at least
     * `subtractedValue`.
     */
    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
        return true;
    }

    /**
     * @dev Moves tokens `amount` from `sender` to `recipient`.
     *
     * This is internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * Requirements:
     *
     * - `sender` cannot be the zero address.
     * - `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     */
    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);

        _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
        _balances[recipient] = _balances[recipient].add(amount);
        emit Transfer(sender, recipient, amount);
    }

    /** @dev Creates `amount` tokens and assigns them to `account`, increasing
     * the total supply.
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     */
    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");

        _beforeTokenTransfer(address(0), account, amount);

        _totalSupply = _totalSupply.add(amount);
        _balances[account] = _balances[account].add(amount);
        emit Transfer(address(0), account, amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`, reducing the
     * total supply.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     * - `account` must have at least `amount` tokens.
     */
    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");

        _beforeTokenTransfer(account, address(0), amount);

        _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
        _totalSupply = _totalSupply.sub(amount);
        emit Transfer(account, address(0), amount);
    }

    /**
     * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
     *
     * This internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     */
    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);
    }

    /**
     * @dev Hook that is called before any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * will be to transferred to `to`.
     * - when `from` is zero, `amount` tokens will be minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens will be burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {}
}

library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");

        return c;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return sub(a, b, "SafeMath: subtraction overflow");
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        uint256 c = a - b;

        return c;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        // 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 0;
        }

        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");

        return c;
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return div(a, b, "SafeMath: division by zero");
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold

        return c;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return mod(a, b, "SafeMath: modulo by zero");
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts with custom message when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }
}

contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor () {
        address msgSender = _msgSender();
        _owner = msgSender;
        emit OwnershipTransferred(address(0), msgSender);
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view 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");
        _;
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        emit OwnershipTransferred(_owner, address(0));
        _owner = address(0);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}

library SafeMathInt {
    int256 private constant MIN_INT256 = int256(1) << 255;
    int256 private constant MAX_INT256 = ~(int256(1) << 255);

    /**
     * @dev Multiplies two int256 variables and fails on overflow.
     */
    function mul(int256 a, int256 b) internal pure returns (int256) {
        int256 c = a * b;

        // Detect overflow when multiplying MIN_INT256 with -1
        require(c != MIN_INT256 || (a & MIN_INT256) != (b & MIN_INT256));
        require((b == 0) || (c / b == a));
        return c;
    }

    /**
     * @dev Division of two int256 variables and fails on overflow.
     */
    function div(int256 a, int256 b) internal pure returns (int256) {
        // Prevent overflow when dividing MIN_INT256 by -1
        require(b != -1 || a != MIN_INT256);

        // Solidity already throws when dividing by 0.
        return a / b;
    }

    /**
     * @dev Subtracts two int256 variables and fails on overflow.
     */
    function sub(int256 a, int256 b) internal pure returns (int256) {
        int256 c = a - b;
        require((b >= 0 && c <= a) || (b < 0 && c > a));
        return c;
    }

    /**
     * @dev Adds two int256 variables and fails on overflow.
     */
    function add(int256 a, int256 b) internal pure returns (int256) {
        int256 c = a + b;
        require((b >= 0 && c >= a) || (b < 0 && c < a));
        return c;
    }

    /**
     * @dev Converts to absolute value, and fails on overflow.
     */
    function abs(int256 a) internal pure returns (int256) {
        require(a != MIN_INT256);
        return a < 0 ? -a : a;
    }


    function toUint256Safe(int256 a) internal pure returns (uint256) {
        require(a >= 0);
        return uint256(a);
    }
}

library SafeMathUint {
  function toInt256Safe(uint256 a) internal pure returns (int256) {
    int256 b = int256(a);
    require(b >= 0);
    return b;
  }
}

interface IUniswapV2Router01 {
    function factory() external pure returns (address);
    function WETH() external pure returns (address);

    function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
        external
        returns (uint[] memory amounts);

    function addLiquidityETH(
        address token,
        uint amountTokenDesired,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external payable returns (uint amountToken, uint amountETH, uint liquidity);
}

interface IUniswapV2Router02 is IUniswapV2Router01 {
    
    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;
}


contract VaiB is ERC20, Ownable {

    using SafeMath for uint256;

    IUniswapV2Router02 public immutable uniswapV2Router;
    address public immutable uniswapV2Pair;
    address public constant deadAddress = address(0xdead);

    bool private swapping;

    uint256 public maxSellTransactionAmount;
    uint256 public swapTokensAtAmount;
    uint256 public maxWallet;

    uint256 public supply;

    address public marketingAddress;
    address public liquidityAddress;

    bool public tradingActive = false;
    bool public liquidityFeeActive = false;
    bool public transferDelayActive = true;

    bool public limitsInEffect = true;
    bool public swapEnabled = true;

    bool public _renounceDelayFunction = false;
    bool public _renounceFeeFunctions = false;
    bool public _renounceMaxUpdateFunctions = false;
    bool public _renounceMarketMakerPairChanges = false;
    bool public _renounceWalletChanges = false;
    bool public _renounceExcludeInclude = false;

    mapping(address => uint256) private _holderLastTransferTimestamp;

    uint256 public buyBurnFee;
    uint256 public buyMarketingFee;
    uint256 public buyLiquidityFee;
    uint256 public buyTotalFees;

    uint256 public sellBurnFee;
    uint256 public sellMarketingFee;
    uint256 public sellLiquidityFee;
    uint256 public sellTotalFees;

    uint256 public feeUnits = 100;

    uint256 public tokensForBurn;
    uint256 public tokensForMarketing;
    uint256 public tokensForDonation;
    uint256 public tokensForLiquidity;

    uint256 private _previousBuyLiquidityFee = 0;
    uint256 private _previousSellLiquidityFee = 0;

    uint256 public maxWalletTotal;
    uint256 public maxSellTransaction;
    uint256 public walletTransferDelayTime;

    /******************/

    // exlcude from fees and max transaction amount
    mapping (address => bool) private _isExcludedFromFees;
    mapping (address => bool) public _isExcludedMaxSellTransactionAmount;

    // Store the automatic market maker pair addresses. Any transfer *to* these addresses
    // could be subject to a maximum transfer amount
    mapping (address => bool) public automatedMarketMakerPairs;

    event UpdateUniswapV2Router(address indexed newAddress, address indexed oldAddress);

    event ExcludeFromFees(address indexed account, bool isExcluded);

    event SetAutomatedMarketMakerPair(address indexed pair, bool indexed value);
    event SwapAndLiquify(uint256 tokensSwapped, uint256 ethReceived, uint256 tokensIntoLiqudity);
    event updateHolderLastTransferTimestamp(address indexed account, uint256 timestamp);


    constructor() ERC20("VaiB", "VaiB") {

        IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);

        excludeFromMaxSellTransaction(address(_uniswapV2Router), true);
        uniswapV2Router = _uniswapV2Router;

        uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this), _uniswapV2Router.WETH());
        excludeFromMaxSellTransaction(address(uniswapV2Pair), true);
        _setAutomatedMarketMakerPair(address(uniswapV2Pair), true);

        uint256 _buyBurnFee = 1;
        uint256 _buyMarketingFee = 28;
        uint256 _buyLiquidityFee = 1;

        uint256 _sellBurnFee = 1;
        uint256 _sellMarketingFee = 28;
        uint256 _sellLiquidityFee = 1;

        uint256 totalSupply = 1000000 * (10 ** 18);
        supply += totalSupply;

        maxWallet = 2;
        maxSellTransaction = 1;
        walletTransferDelayTime = 0;

        maxSellTransactionAmount = supply * maxSellTransaction / 100;
        swapTokensAtAmount = supply * 5 / 100000; // 0.005% swap wallet;
        maxWalletTotal = supply * maxWallet / 100;

        buyBurnFee = _buyBurnFee;
        buyMarketingFee = _buyMarketingFee;
        buyLiquidityFee = _buyLiquidityFee;
        buyTotalFees = buyBurnFee + buyMarketingFee + buyLiquidityFee;

        sellBurnFee = _sellBurnFee;
        sellMarketingFee = _sellMarketingFee;
        sellLiquidityFee = _sellLiquidityFee;
        sellTotalFees = sellBurnFee + sellMarketingFee + sellLiquidityFee;

        marketingAddress = 0x3bfE5B0d301104Fd858eB1Ae15154d2655EAc869;
        liquidityAddress = msg.sender;

        excludeFromFees(owner(), true);
        excludeFromFees(address(this), true);
        excludeFromFees(address(0xdead), true);

        excludeFromMaxSellTransaction(owner(), true);
        excludeFromMaxSellTransaction(address(this), true);
        excludeFromMaxSellTransaction(address(0xdead), true);

        _approve(owner(), address(uniswapV2Router), totalSupply);
        _mint(msg.sender, totalSupply);
    }

    receive() external payable {}

    function toggleTransferDelayActive () external onlyOwner {
      require(!_renounceDelayFunction, "Cannot update wallet transfer delay time after renouncement");
        transferDelayActive = !transferDelayActive;
    }

    function toggleLiquidityFeeActive () external onlyOwner {
      require(!_renounceFeeFunctions, "Cannot update fees after renouncemennt");
        if (liquidityFeeActive) {
        _previousBuyLiquidityFee = buyLiquidityFee;
        _previousSellLiquidityFee = sellLiquidityFee;
        }
        buyLiquidityFee = liquidityFeeActive ? 0 : _previousBuyLiquidityFee;
        sellLiquidityFee = liquidityFeeActive ? 0 : _previousSellLiquidityFee;
        liquidityFeeActive = !liquidityFeeActive;
    }

    function enableTrading() external onlyOwner {
        buyBurnFee = 1;
        buyMarketingFee = 28;
        buyLiquidityFee = 1;
        buyTotalFees = buyBurnFee + buyMarketingFee + buyLiquidityFee;

        sellBurnFee = 1;
        sellMarketingFee = 28;
        sellLiquidityFee = 1;
        sellTotalFees = sellBurnFee + sellMarketingFee + sellLiquidityFee;

        walletTransferDelayTime = 180;

        tradingActive = true;
        liquidityFeeActive = true;
    }

    function updateMaxSellTransaction(uint256 newNum) external onlyOwner {
      require(!_renounceMaxUpdateFunctions, "Cannot update max transaction amount after renouncement");
        require(newNum >= 1);
        maxSellTransaction = newNum;
        updateLimits();
    }

    function updateMaxWallet(uint256 newNum) external onlyOwner {
      require(!_renounceMaxUpdateFunctions, "Cannot update max transaction amount after renouncement");
        require(newNum >= 1);
        maxWallet = newNum;
        updateLimits();
    }

    function updateWalletTransferDelayTime(uint256 newNum) external onlyOwner{
      require(!_renounceDelayFunction, "Cannot update wallet transfer delay time after renouncement");
        walletTransferDelayTime = newNum;
    }

    function excludeFromMaxSellTransaction(address updAds, bool isEx) public onlyOwner {
      require(!_renounceMaxUpdateFunctions, "Cannot update max transaction amount after renouncement");
        _isExcludedMaxSellTransactionAmount[updAds] = isEx;
    }

    // if want fractional % in future, need to increase the fee units
    function updateFeeUnits(uint256 newNum) external onlyOwner {
      require(!_renounceFeeFunctions, "Cannot update fees after renouncement");
        feeUnits = newNum;
    }

    function updateBuyFees(uint256 _burnFee, uint256 _marketingFee, uint256 _buyLiquidityFee) external onlyOwner {
      require(!_renounceFeeFunctions, "Cannot update fees after renouncement");
        buyBurnFee = _burnFee;
        buyMarketingFee = _marketingFee;
        buyLiquidityFee = _buyLiquidityFee;
        buyTotalFees = buyBurnFee + buyMarketingFee + buyLiquidityFee;
    }

    function updateSellFees(uint256 _burnFee, uint256 _marketingFee, uint256 _sellLiquidityFee) external onlyOwner {
      require(!_renounceFeeFunctions, "Cannot update fees after renouncement");
        sellBurnFee = _burnFee;
        sellMarketingFee = _marketingFee;
        sellLiquidityFee = _sellLiquidityFee;
        sellTotalFees = sellBurnFee + sellMarketingFee + sellLiquidityFee;
    }

    function updateMarketingAddress(address newWallet) external onlyOwner {
      require(!_renounceWalletChanges, "Cannot update wallet after renouncement");
        marketingAddress = newWallet;
    }

    function updateLiquidityAddress(address newWallet) external onlyOwner {
      require(!_renounceWalletChanges, "Cannot update wallet after renouncement");
        liquidityAddress = newWallet;
    }

    function excludeFromFees(address account, bool excluded) public onlyOwner {
      require(!_renounceExcludeInclude, "Cannot update excluded accounts after renouncement");
        _isExcludedFromFees[account] = excluded;
        emit ExcludeFromFees(account, excluded);
    }

    function includeInFees(address account) public onlyOwner {
      require(!_renounceExcludeInclude, "Cannot update excluded accounts after renouncement");
        excludeFromFees(account, false);
    }

    function setLiquidityAddress(address newAddress) public onlyOwner {
      require(!_renounceWalletChanges, "Cannot update wallet after renouncement");
        liquidityAddress = newAddress;
    }

    function updateLimits() private {
        maxSellTransactionAmount = supply * maxSellTransaction / 100;
        swapTokensAtAmount = supply * 5 / 10000; // 0.05% swap wallet;
        maxWalletTotal = supply * maxWallet / 100;
    }

    function setAutomatedMarketMakerPair(address pair, bool value) public onlyOwner {
      require(!_renounceMarketMakerPairChanges, "Cannot update market maker pairs after renouncement");
        require(pair != uniswapV2Pair, "The pair cannot be removed from automatedMarketMakerPairs");

        _setAutomatedMarketMakerPair(pair, value);
    }

    function _setAutomatedMarketMakerPair(address pair, bool value) private {
        automatedMarketMakerPairs[pair] = value;

        emit SetAutomatedMarketMakerPair(pair, value);
    }

    function isExcludedFromFees(address account) public view returns(bool) {
        return _isExcludedFromFees[account];
    }

    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(!tradingActive){
                    require(_isExcludedFromFees[from] || _isExcludedFromFees[to], "Trading is not active.");
                }

                // if the transfer delay is enabled, will block adding to liquidity/sells (transactions to AMM pair)
                if (transferDelayActive && automatedMarketMakerPairs[to]) {
                        require(block.timestamp >= _holderLastTransferTimestamp[tx.origin] + walletTransferDelayTime, "Transfer delay is active.Only one sell per ~walletTransferDelayTime~ allowed.");
                }

                // add the wallet to the _holderLastTransferTimestamp(address, timestamp) map
                _holderLastTransferTimestamp[tx.origin] = block.timestamp;
                emit updateHolderLastTransferTimestamp(tx.origin, block.timestamp);

                //when buy
                if (automatedMarketMakerPairs[from] && !_isExcludedMaxSellTransactionAmount[to] && !automatedMarketMakerPairs[to]){
                        require(amount + balanceOf(to) <= maxWalletTotal, "Max wallet exceeded");
                }

                //when sell
                else if (automatedMarketMakerPairs[to] && !_isExcludedMaxSellTransactionAmount[from] && !automatedMarketMakerPairs[from]){
                        require(amount <= maxSellTransactionAmount, "Sell transfer amount exceeds the maxSellTransactionAmount.");
                }
                else if(!_isExcludedMaxSellTransactionAmount[to]){
                    require(amount + balanceOf(to) <= maxWalletTotal, "Max wallet exceeded");
                }
            }
        }
        uint256 contractTokenBalance = balanceOf(address(this));

        bool canSwap = contractTokenBalance >= swapTokensAtAmount;

        if(
            canSwap &&
            !swapping &&
            swapEnabled &&
            !automatedMarketMakerPairs[from] &&
            !_isExcludedFromFees[from] &&
            !_isExcludedFromFees[to]
        ) {
            swapping = true;

            swapBack();

            swapping = false;
        }

        bool takeFee = !swapping;

        if(_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
            takeFee = false;
        }

        uint256 fees = 0;

        if(takeFee){
            // on sell
            if (automatedMarketMakerPairs[to] && sellTotalFees > 0){
                fees = amount.mul(sellTotalFees).div(feeUnits);
                tokensForBurn += fees * sellBurnFee / sellTotalFees;
                tokensForMarketing += fees * sellMarketingFee / sellTotalFees;
                if (liquidityFeeActive) {
                    tokensForLiquidity += fees * sellLiquidityFee / sellTotalFees;
                }
            }

            // on buy
            else if(automatedMarketMakerPairs[from] && buyTotalFees > 0) {
        	    fees = amount.mul(buyTotalFees).div(feeUnits);
        	    tokensForBurn += fees * buyBurnFee / buyTotalFees;
                tokensForMarketing += fees * buyMarketingFee / buyTotalFees;
                if (liquidityFeeActive) {
                    tokensForLiquidity += fees * buyLiquidityFee / buyTotalFees;
                }
            }

            if(fees > 0){
                super._transfer(from, address(this), fees);
                if (tokensForBurn > 0) {
                    _burn(address(this), tokensForBurn);
                    supply = totalSupply();
                    updateLimits();
                    tokensForBurn = 0;
                }
            }

        	amount -= fees;
        }

        super._transfer(from, to, amount);
      }

    function renounceFeeFunctions () public onlyOwner {
        require(msg.sender == owner(), "Only the owner can renounce fee functions");
        _renounceFeeFunctions = true;
    }

    function renounceDelayFunction () public onlyOwner {
        require(msg.sender == owner(), "Only the owner can renounce delay function");
        _renounceDelayFunction = true;
    }

    function renounceWalletChanges () public onlyOwner {
        require(msg.sender == owner(), "Only the owner can renounce wallet changes");
        _renounceWalletChanges = true;
    }

    function renounceMaxUpdateFunctions () public onlyOwner {
        require(msg.sender == owner(), "Only the owner can renounce max update functions");
        _renounceMaxUpdateFunctions = true;
    }

    function renounceMarketMakerPairChanges () public onlyOwner {
        require(msg.sender == owner(), "Only the owner can renounce market maker pair changes");
        _renounceMarketMakerPairChanges = true;
    }

    function renounceExcludeInclude () public onlyOwner {
        require(msg.sender == owner(), "Only the owner can renounce exclude include");
        _renounceExcludeInclude = true;
    }

    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] = uniswapV2Router.WETH();

        _approve(address(this), address(uniswapV2Router), tokenAmount);

        // make the swap
        uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
            tokenAmount,
            0, // accept any amount of ETH
            path,
            address(this),
            block.timestamp
        );

    }

    function swapBack() private {
        
        uint256 contractBalance = balanceOf(address(this));
        if(contractBalance == 0) {return;}

        if(tokensForMarketing > 0) swapForMarketing(tokensForMarketing);
        if(tokensForLiquidity > 0)  swapForLiquidity(tokensForLiquidity);
    }

    function swapForMarketing(uint _tokens) private {
        uint256 initalBalance = address(this).balance;
        swapTokensForEth(_tokens);
        uint256 RecievedBalance = address(this).balance - initalBalance;
        payable(marketingAddress).transfer(RecievedBalance);
        tokensForMarketing = tokensForMarketing - _tokens;
    }

    function swapForLiquidity(uint _tokens) private {
        uint half = _tokens / 2;
        uint otherhalf = _tokens - half;
        uint256 initalBalance = address(this).balance;
        swapTokensForEth(half);
        uint256 RecievedBalance = address(this).balance - initalBalance;
        addLiquidity(otherhalf,RecievedBalance);
        tokensForLiquidity = tokensForLiquidity - _tokens;
    }


    function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
        // approve token transfer to cover all possible scenarios
        _approve(address(this), address(uniswapV2Router), tokenAmount);

        // add the liquidity
        uniswapV2Router.addLiquidityETH{value: ethAmount}(
            address(this),
            tokenAmount,
            0, // slippage is unavoidable
            0, // slippage is unavoidable
            liquidityAddress,
            block.timestamp
        );
    }

}