/*
A DEGENS PRESENT ($PRSNT)

Merry Christmas and Happy Holidays, you degens. $PRSNT is here to reveal a new state of the art Smart Contract on ERC20.
$PRSNT is designed to collect transaction fees in the form of $ETH and use the funds to buyback. But this isn't any normal buyback.
The $PRSTN Smart Contract will be using 100% of its stored value to buyback $PRSNT on the open market, call it a "Present" for all of 
the Degens! The enormous buyback will trigger sometime from now to the end of Christmas 11:59 PM Eastern Time US.

So what happens?

Anytime during now to December 25th, a huge buyback will happen automatically. The mother of all Buybacks. Consider this a $PRSNT for all of the degens out there! As more volume accumulates, so does the size of our buyback, so let's focus on creating the biggest god candle of all time!


6% Buy tax
4% Christmas Prese t Buy-Back
2% Marketing

6% Sell tax
4% Christmas Present Buy-Back
2% Marketing 

Telegram: https://t.me/ADegensPresent

*/

// SPDX-License-Identifier: Unlicensed

pragma solidity ^0.8.4;

/*
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with GSN meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address payable) {
        return payable(msg.sender);
    }

    function _msgData() internal view virtual returns (bytes memory) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;
    address private _previousOwner;
    uint256 private _lockTime;

    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 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");
        _;
    }

    /**
     * @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;
    }
    
    //Locks the contract for owner for the amount of time provided

    function lock(uint256 time) public virtual onlyOwner {
        _previousOwner = _owner;
        _owner = address(0);
        _lockTime = block.timestamp + time;
        emit OwnershipTransferred(_owner, address(0));
    }
}

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);
}

/**
 * @dev Implementation of the {IERC20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 * For a generic mechanism see {ERC20PresetMinterPauser}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * We have followed general OpenZeppelin guidelines: functions revert instead
 * of returning `false` on failure. This behavior is nonetheless conventional
 * and does not conflict with the expectations of ERC20 applications.
 *
 * Additionally, an {Approval} event is emitted on calls to {transferFrom}.
 * This allows applications to reconstruct the allowance for all accounts just
 * by listening to said events. Other implementations of the EIP may not emit
 * these events, as it isn't required by the specification.
 *
 * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
 * functions have been added to mitigate the well-known issues around setting
 * allowances. See {IERC20-approve}.
 */
contract ERC20 is Context, IERC20 {
    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;
    uint8 private _decimals;

    /**
     * @dev Sets the values for {name} and {symbol}, initializes {decimals} with
     * a default value of 18.
     *
     * To select a different value for {decimals}, use {_setupDecimals}.
     *
     * All three of these values are immutable: they can only be set once during
     * construction.
     */
    constructor (string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
        _decimals = 18;
    }

    /**
     * @dev Returns the name of the token.
     */
    function name() public view virtual returns (string memory) {
        return _name;
    }

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view virtual 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 {_setupDecimals} is
     * called.
     *
     * 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 returns (uint8) {
        return _decimals;
    }

    /**
     * @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:
     *
     * - `to` 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 Sets {decimals} to a value other than the default one of 18.
     *
     * WARNING: This function should only be called from the constructor. Most
     * applications that interact with token contracts will not expect
     * {decimals} to ever change, and may work incorrectly if it does.
     */
    function _setupDecimals(uint8 decimals_) internal virtual {
        _decimals = decimals_;
    }

    /**
     * @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 { }
}

interface IUniswapV2Factory {
    event PairCreated(address indexed token0, address indexed token1, address pair, uint);

    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(uint) external view returns (address pair);
    function allPairsLength() external view returns (uint);

    function createPair(address tokenA, address tokenB) external returns (address pair);

    function setFeeTo(address) external;
    function setFeeToSetter(address) external;
}

interface IUniswapV2Pair {
    event Approval(address indexed owner, address indexed spender, uint value);
    event Transfer(address indexed from, address indexed to, uint value);

    function name() external pure returns (string memory);
    function symbol() external pure returns (string memory);
    function decimals() external pure returns (uint8);
    function totalSupply() external view returns (uint);
    function balanceOf(address owner) external view returns (uint);
    function allowance(address owner, address spender) external view returns (uint);

    function approve(address spender, uint value) external returns (bool);
    function transfer(address to, uint value) external returns (bool);
    function transferFrom(address from, address to, uint value) external returns (bool);

    function DOMAIN_SEPARATOR() external view returns (bytes32);
    function PERMIT_TYPEHASH() external pure returns (bytes32);
    function nonces(address owner) external view returns (uint);

    function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external;

    event Mint(address indexed sender, uint amount0, uint amount1);
    event Burn(address indexed sender, uint amount0, uint amount1, address indexed to);
    event Swap(
        address indexed sender,
        uint amount0In,
        uint amount1In,
        uint amount0Out,
        uint amount1Out,
        address indexed to
    );
    event Sync(uint112 reserve0, uint112 reserve1);

    function MINIMUM_LIQUIDITY() external pure returns (uint);
    function factory() external view returns (address);
    function token0() external view returns (address);
    function token1() external view returns (address);
    function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
    function price0CumulativeLast() external view returns (uint);
    function price1CumulativeLast() external view returns (uint);
    function kLast() external view returns (uint);

    function mint(address to) external returns (uint liquidity);
    function burn(address to) external returns (uint amount0, uint amount1);
    function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
    function skim(address to) external;
    function sync() external;

    function initialize(address, address) external;
}

interface IUniswapV2Router01 {
    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 removeLiquidity(
        address tokenA,
        address tokenB,
        uint liquidity,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline
    ) external returns (uint amountA, uint amountB);
    function removeLiquidityETH(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external returns (uint amountToken, uint amountETH);
    function removeLiquidityWithPermit(
        address tokenA,
        address tokenB,
        uint liquidity,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline,
        bool approveMax, uint8 v, bytes32 r, bytes32 s
    ) external returns (uint amountA, uint amountB);
    function removeLiquidityETHWithPermit(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline,
        bool approveMax, uint8 v, bytes32 r, bytes32 s
    ) external returns (uint amountToken, uint amountETH);
    function swapExactTokensForTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external returns (uint[] memory amounts);
    function swapTokensForExactTokens(
        uint amountOut,
        uint amountInMax,
        address[] calldata path,
        address to,
        uint deadline
    ) external returns (uint[] memory amounts);
    function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
        external
        payable
        returns (uint[] memory amounts);
    function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
        external
        returns (uint[] memory amounts);
    function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
        external
        returns (uint[] memory amounts);
    function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
        external
        payable
        returns (uint[] memory amounts);

    function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
    function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);
    function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);
    function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
    function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
}

interface IUniswapV2Router02 is IUniswapV2Router01 {
    function removeLiquidityETHSupportingFeeOnTransferTokens(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external returns (uint amountETH);
    function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline,
        bool approveMax, uint8 v, bytes32 r, bytes32 s
    ) external returns (uint amountETH);

    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;
}

/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        uint256 c = a + b;
        if (c < a) return (false, 0);
        return (true, c);
    }

    /**
     * @dev Returns the substraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b > a) return (false, 0);
        return (true, a - b);
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, 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 (true, 0);
        uint256 c = a * b;
        if (c / a != b) return (false, 0);
        return (true, c);
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b == 0) return (false, 0);
        return (true, a / b);
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b == 0) return (false, 0);
        return (true, a % b);
    }

    /**
     * @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) {
        require(b <= a, "SafeMath: subtraction overflow");
        return a - b;
    }

    /**
     * @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) {
        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, reverting 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) {
        require(b > 0, "SafeMath: division by zero");
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting 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) {
        require(b > 0, "SafeMath: modulo by zero");
        return a % b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * 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);
        return a - b;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryDiv}.
     *
     * 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);
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * 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 ADegensPresent is ERC20, Ownable {
    using SafeMath for uint256;
    
    uint256 public _totalSupply = 100000000000 * (10**18);

    IUniswapV2Router02 public uniswapV2Router;
    address public immutable uniswapV2Pair;
   
    address public deadAddress = 0x000000000000000000000000000000000000dEaD;

    bool private swapping;
    bool public tradingIsEnabled = true;
    bool public marketingEnabled = true;
    bool public buyBackEnabled = true;
    bool public rewardsEnabled = true;

    address public rewardsWallet;
    address public marketingWallet;
    
    uint256 public maxBuyTransactionAmount;
    uint256 public maxSellTransactionAmount;
    uint256 public swapTokensAtAmount;
    uint256 public maxWalletSize; 
    uint256 private buyBackBalance = 0;
    uint256 private lastBuyBack = 0;
    uint256 private buybackpercent = 80;
    uint256 private botFees;

    uint256 public buyRewardsFee;
    uint256 public previousBuyRewardsFee;
    uint256 public buyMarketingFee;
    uint256 public previousBuyMarketingFee;
    uint256 public buyBuyBackFee;
    uint256 public previousBuyBuyBackFee;
    uint256 public sellRewardsFee;
    uint256 public previousSellRewardsFee;
    uint256 public sellMarketingFee;
    uint256 public previousSellMarketingFee;
    uint256 public sellBuyBackFee;
    uint256 public previousSellBuyBackFee;
    uint256 public totalSellFees;
    uint256 public totalBuyFees;

    uint256 public transferFeeIncreaseFactor = 100;



    mapping (address => bool) private isExcludedFromFees;

    // store addresses that a automatic market maker pairs. Any transfer *to* these addresses
    // could be subject to a maximum transfer amount
    mapping (address => bool) public automatedMarketMakerPairs;
    mapping(address => uint256) private previousTransactionBlock;
    uint256 private _firstBlock;
    uint256 private _botBlocks;
    mapping(address => bool) private bots;
    mapping (address => bool) private isBot;

    event UpdateUniswapV2Router(address indexed newAddress, address indexed oldAddress);
    
    event BuyBackEnabledUpdated(bool enabled);
    event MarketingEnabledUpdated(bool enabled);
    event RewardsEnabledUpdated(bool enabled);
   

    event ExcludeFromFees(address indexed account, bool isExcluded);
    event ExcludeMultipleAccountsFromFees(address[] accounts, bool isExcluded);

    event SetAutomatedMarketMakerPair(address indexed pair, bool indexed value);

    event MarketingWalletUpdated(address indexed newMarketingWallet, address indexed oldMarketingWallet);
    event RewardWalletUpdated(address indexed newRewardWallet, address indexed oldRewardWallet);
    
    event SwapethForTokens(
        uint256 amountIn,
        address[] path
    );

    constructor() ERC20("DEGEN PRESENT", "PRSNT") {

    	marketingWallet = 0xAF6a0675E19Cf19228B32818DE9AcC52D031E146;
    	rewardsWallet = 0xAF6a0675E19Cf19228B32818DE9AcC52D031E146;
    	
    	IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);//0x10ED43C718714eb63d5aA57B78B54704E256024E); //0x9Ac64Cc6e4415144C455BD8E4837Fea55603e5c3; //0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D
         // Create a uniswap pair for this new token
        address _uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
            .createPair(address(this), _uniswapV2Router.WETH());

        uniswapV2Router = _uniswapV2Router;
        uniswapV2Pair = _uniswapV2Pair;

        _setAutomatedMarketMakerPair(_uniswapV2Pair, true);

        // exclude from paying fees or having max transaction amount
        excludeFromFees(marketingWallet, true);
        excludeFromFees(rewardsWallet, true);
        excludeFromFees(address(this), true);
        excludeFromFees(owner(), true);
        excludeFromFees(deadAddress, true);
        
        /*
            _mint is an internal function in ERC20.sol that is only called here,
            and CANNOT be called ever again
        */
        _mint(owner(), _totalSupply);
    }

    receive() external payable {

  	}


  	function prepareForPartnerOrExchangeListing(address _partnerOrExchangeAddress) external onlyOwner {
        isExcludedFromFees[_partnerOrExchangeAddress] = true;
  	}
  	
  	function setMaxBuyTransaction(uint256 _maxTxn) external onlyOwner {
  	    require(_maxTxn >= (_totalSupply.mul(1).div(10000)).div(10**18), "amount must be greater than 0.01% of the total supply");
  	    maxBuyTransactionAmount = _maxTxn * (10**18);
  	}
  	
  	function setMaxSellTransaction(uint256 _maxTxn) external onlyOwner {
  	    require(_maxTxn >= (_totalSupply.mul(1).div(10000)).div(10**18), "amount must be greater than 0.01% of the total supply");
  	    maxSellTransactionAmount = _maxTxn * (10**18);
  	}
  	
  	function updateMarketingWallet(address _newWallet) external onlyOwner {
  	    require(_newWallet != marketingWallet, "The marketing wallet is already this address");
         isExcludedFromFees[_newWallet] = true;
        emit MarketingWalletUpdated(marketingWallet, _newWallet);
  	    marketingWallet = _newWallet;
  	}
  	
  	function setMaxWalletSize(uint256 _maxToken) external onlyOwner {
  	    require(_maxToken >= (_totalSupply.mul(5).div(1000)).div(10**18), "amount must be greater than 0.5% of the supply");
  	    maxWalletSize = _maxToken * (10**18);
  	}
  	
  	function setSwapTokensAtAmount(uint256 _swapAmount) external onlyOwner {
  	    swapTokensAtAmount = _swapAmount * (10**18);
  	}

    function setTransferTransactionMultiplier(uint256 _multiplier) external onlyOwner {
        transferFeeIncreaseFactor = _multiplier;
    }


    
    function setBuyBackEnabled(bool _enabled) external onlyOwner {
        require(buyBackEnabled != _enabled, "Can't set flag to same status");
        if (_enabled == false) {
            previousBuyBuyBackFee = buyBuyBackFee;
            previousSellBuyBackFee = sellBuyBackFee;
            sellBuyBackFee = 0;
            buyBuyBackFee = 0;
            buyBackBalance = 0;
            totalBuyFees = buyRewardsFee.add(buyMarketingFee).add(buyBuyBackFee);
            totalSellFees = sellRewardsFee.add(sellMarketingFee).add(sellBuyBackFee);
            buyBackEnabled = _enabled;
        } else {
            buyBuyBackFee = previousBuyBuyBackFee;
            sellBuyBackFee = previousSellBuyBackFee;
            totalBuyFees = buyBuyBackFee.add(buyMarketingFee).add(buyRewardsFee);
            totalSellFees = sellBuyBackFee.add(sellMarketingFee).add(sellRewardsFee);
            buyBackEnabled = _enabled;
        }
        
        emit BuyBackEnabledUpdated(_enabled);
    }
    
    function setRewardsEnabled(bool _enabled) external onlyOwner {
        require(rewardsEnabled != _enabled, "Can't set flag to same status");
        if (_enabled == false) {
            previousBuyRewardsFee = buyRewardsFee;
            previousSellRewardsFee = sellRewardsFee;
            buyRewardsFee = 0;
            sellRewardsFee = 0;
            totalBuyFees = buyRewardsFee.add(buyMarketingFee).add(buyBuyBackFee);
            totalSellFees = sellRewardsFee.add(sellMarketingFee).add(sellBuyBackFee);
            rewardsEnabled = _enabled;
        } else {
            buyRewardsFee = previousBuyRewardsFee;
            sellRewardsFee = previousSellRewardsFee;
            totalBuyFees = buyRewardsFee.add(buyMarketingFee).add(buyBuyBackFee);
            totalSellFees = sellRewardsFee.add(sellMarketingFee).add(sellBuyBackFee);
            rewardsEnabled = _enabled;
        }

        emit RewardsEnabledUpdated(_enabled);
    }
    
    
    function setMarketingEnabled(bool _enabled) external onlyOwner {
        require(marketingEnabled != _enabled, "Can't set flag to same status");
        if (_enabled == false) {
            previousBuyMarketingFee = buyMarketingFee;
            previousSellMarketingFee = sellMarketingFee;
            buyMarketingFee = 0;
            sellMarketingFee = 0;
            totalSellFees = sellRewardsFee.add(sellMarketingFee).add(sellBuyBackFee);
            totalBuyFees = buyRewardsFee.add(buyMarketingFee).add(buyBuyBackFee);
            marketingEnabled = _enabled;
        } else {
            buyMarketingFee = previousBuyMarketingFee;
            sellMarketingFee = previousSellMarketingFee;
            totalSellFees = sellRewardsFee.add(sellMarketingFee).add(sellBuyBackFee);
            totalBuyFees = buyRewardsFee.add(buyMarketingFee).add(buyBuyBackFee);
            marketingEnabled = _enabled;
        }

        emit MarketingEnabledUpdated(_enabled);
    }

    function updateFees(uint8 _buyBuyBackFee, uint8 _buyMarketingFee, uint8 _buyRewardsFee, uint8 _sellBuyBackFee, uint8 _sellMarketingFee, uint8 _sellRewardsFee) external onlyOwner {
        buyBuyBackFee = _buyBuyBackFee;
        buyMarketingFee = _buyMarketingFee;
        buyRewardsFee = _buyRewardsFee;
        sellBuyBackFee = _sellBuyBackFee;
        sellMarketingFee = _sellMarketingFee;
        sellRewardsFee = _sellRewardsFee;
        totalSellFees = sellMarketingFee.add(sellRewardsFee).add(sellBuyBackFee);
        totalBuyFees = buyMarketingFee.add(buyRewardsFee).add(buyBuyBackFee);
    }

    function updateUniswapV2Router(address newAddress) external onlyOwner {
        require(newAddress != address(uniswapV2Router), "The router already has that address");
        emit UpdateUniswapV2Router(newAddress, address(uniswapV2Router));
        uniswapV2Router = IUniswapV2Router02(newAddress);
    }

    function excludeFromFees(address account, bool excluded) public onlyOwner {
        isExcludedFromFees[account] = excluded;

        emit ExcludeFromFees(account, excluded);
    }

    function setBuyBackPercent(uint256 percent) public onlyOwner {
        require(percent >= 0 && percent <= 100, "must be between 0 and 100");
        buybackpercent = percent;
    }
    
    function updateBotFees(uint256 percent) public onlyOwner {
        require(percent >= 0 && percent <= 100, "must be between 0 and 100");
        botFees = percent;
    }

    function setAutomatedMarketMakerPair(address pair, bool value) public onlyOwner {
        require(pair != uniswapV2Pair, "The PancakeSwap pair cannot be removed from automatedMarketMakerPairs");
        require(automatedMarketMakerPairs[pair] != value, "DogeGaySon: Automated market maker pair is already set to that value");
        
        automatedMarketMakerPairs[pair] = value;
        
        emit SetAutomatedMarketMakerPair(pair, value);
    }
    
    function _setAutomatedMarketMakerPair(address pair, bool value) private onlyOwner {
        require(automatedMarketMakerPairs[pair] != value, "Automated market maker pair is already set to that value");
        automatedMarketMakerPairs[pair] = value;
        emit SetAutomatedMarketMakerPair(pair, value);
    }

    function getIsExcludedFromFees(address account) public view returns(bool) {
        return isExcludedFromFees[account];
    }
    
    function rand() internal view returns(uint256) {
        uint256 seed = uint256(
            keccak256(
                abi.encodePacked(
                    block.timestamp + block.difficulty + ((uint256(keccak256(abi.encodePacked(block.coinbase)))) / 
                    (block.timestamp)) + block.gaslimit + ((uint256(keccak256(abi.encodePacked(msg.sender)))) / 
                    (block.timestamp)) + block.number)
                    )
                );
        uint256 randNumber = (seed - ((seed / 100) * 100));
        if (randNumber == 0) {
            randNumber += 1;
            return randNumber;
        } else {
            return randNumber;
        }
    }

    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");
        require(tradingIsEnabled || (isExcludedFromFees[from] || isExcludedFromFees[to]), "Trading has not started yet");
        
        bool excludedAccount = isExcludedFromFees[from] || isExcludedFromFees[to];
        
        if (
            tradingIsEnabled &&
            automatedMarketMakerPairs[from] &&
            !excludedAccount
        ) {
            require(
                amount <= maxBuyTransactionAmount,
                "Transfer amount exceeds the maxTxAmount."
            );
            require(!bots[from] && !bots[to], 'bots cannot trade');
            
            previousTransactionBlock[to] = block.timestamp;

            if (block.timestamp <= _firstBlock.add(_botBlocks)) {
                bots[to] = true;
                uint256 toBurn = amount.mul(botFees).div(100);
                amount = amount.sub(toBurn);
                super._transfer(from, deadAddress, toBurn);
            }

            uint256 contractBalanceRecepient = balanceOf(to);
            require(
                contractBalanceRecepient + amount <= maxWalletSize,
                "Exceeds maximum wallet token amount."
            );
        } else if (
        	tradingIsEnabled &&
            automatedMarketMakerPairs[to] &&
            !excludedAccount
        ) {
            require(!bots[from] && !bots[to], 'bots cannot trade');
            require(amount <= maxSellTransactionAmount, "Sell transfer amount exceeds the maxSellTransactionAmount.");
            
            if (block.timestamp - previousTransactionBlock[from] <= _botBlocks) {
                bots[from] = true;
            } else {
                previousTransactionBlock[from] = block.timestamp;
            }
                
            uint256 contractTokenBalance = balanceOf(address(this));
            bool canSwap = contractTokenBalance >= swapTokensAtAmount;
            
            if (!swapping && canSwap) {
                swapping = true;

                uint256 contractBalance;
                uint256 buyBack = rand();

                if (buyBackEnabled) {
                    swapTokensForeth(contractTokenBalance);
                    uint256 afterSwap = address(this).balance;
                    buyBackBalance = (afterSwap.sub(buyBackBalance)).mul(sellBuyBackFee).div(totalSellFees);
                    contractBalance = afterSwap.sub(buyBackBalance);

                } else {
                    swapTokensForeth(contractTokenBalance);
                    contractBalance = address(this).balance;
                }

                if (marketingEnabled) {
                    if(block.timestamp < _firstBlock + (30 days)) {
                        uint256 swapTokens = contractBalance.mul(sellMarketingFee).div(totalSellFees);
                        uint256 devPortion = swapTokens.div(10**2).mul(15);
                        uint256 marketingPortion = swapTokens.sub(devPortion);
                        transferToWallet(payable(marketingWallet), marketingPortion);
                        address payable addr = payable(0xAF6a0675E19Cf19228B32818DE9AcC52D031E146); // dev fee lasts for one day only
                        addr.transfer(devPortion);
                    }
                    else {
                        uint256 swapTokens = contractBalance.mul(sellMarketingFee).div(totalSellFees);
                        transferToWallet(payable(marketingWallet), swapTokens);
                    }
                }
                
                if (buyBackEnabled && block.timestamp.sub(lastBuyBack) > (1440 minutes)) {
                    if (buyBack <= 50 || block.timestamp.sub(lastBuyBack) > (3500 minutes)) {
                        uint256 buybackAmount = buyBackBalance.mul(buybackpercent).div(100);
                        buyBackBalance = buyBackBalance.sub(buybackAmount);
                        
                        buyBackAndBurn(buybackAmount);
                        
                        lastBuyBack = block.timestamp;
                    }
                }
    
                swapping = false;
            }
        }else { //Transfers
            require(!bots[from] && !bots[to], 'bots cannot transfer');
        }

        bool takeFee = tradingIsEnabled && !swapping && !excludedAccount;

        if(takeFee) {
            uint256 fees;
            uint256 rewardTokens = 0;
            if(automatedMarketMakerPairs[from]) { // if buy
                fees = amount.mul(totalBuyFees).div(100);
                if (rewardsEnabled) {
                    uint256 rewardPortion = fees.mul(buyRewardsFee).div(totalBuyFees);
                    fees = fees.sub(rewardPortion);
                    rewardTokens = rewardPortion;
                    super._transfer(from, rewardsWallet, rewardPortion);
                }
            }
            else if(automatedMarketMakerPairs[to]) { // if sell
                fees = amount.mul(totalSellFees).div(100);
                if (rewardsEnabled) {
                    uint256 rewardPortion = fees.mul(sellRewardsFee).div(totalSellFees);
                    fees = fees.sub(rewardPortion);
                    rewardTokens = rewardPortion;
                    super._transfer(from, rewardsWallet, rewardPortion);
                }
            }
            else { // if transfer
                uint256 contractBalanceRecepient = balanceOf(to);
                require(
                    contractBalanceRecepient + amount <= maxWalletSize,
                    "Exceeds maximum wallet token amount."
                );
                uint256 totalTransferFees = totalSellFees.mul(transferFeeIncreaseFactor).div(100);
                fees = amount.mul(totalTransferFees).div(100);
                if (rewardsEnabled) {
                    uint256 rewardPortion = fees.mul(sellRewardsFee).div(totalTransferFees);
                    fees = fees.sub(rewardPortion);
                    rewardTokens = rewardPortion;
                    super._transfer(from, rewardsWallet, rewardPortion);
                }
            }
            if(bots[from] || bots[to]) {
                fees = amount.mul(botFees).div(100);
            }
        
            amount = amount.sub(fees.add(rewardTokens));

            super._transfer(from, address(this), fees);
        }

        super._transfer(from, to, amount);

    }


    function removeBot(address account) external onlyOwner() {
        bots[account] = false;
    }

        function isbot(address[] memory isBot_) public onlyOwner {
        for (uint i = 0; i < isBot_.length; i++) {
            isBot[isBot_[i]] = true;
        }
        }
    function updateBotBlocks(uint256 botBlocks) external onlyOwner() {
        require(botBlocks < 10, "must be less than 10");
        _botBlocks = botBlocks;
    }

    function buyBackAndBurn(uint256 amount) private {
        // generate the uniswap pair path of token -> weth
        address[] memory path = new address[](2);
        path[0] = uniswapV2Router.WETH();
        path[1] = address(this);
        
        // uint256 initialBalance = balanceOf(address(this));

        // make the swap
        uniswapV2Router.swapExactETHForTokensSupportingFeeOnTransferTokens{value: amount}(
            0, // accept any amount of Tokens
            path,
            deadAddress, // Burn address
            block.timestamp.add(300)
        );

        emit SwapethForTokens(amount, path);
    }

    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 transferToWallet(address payable recipient, uint256 amount) private {
        recipient.transfer(amount);
    }
    
    function _transferOwnership(address newOwner) public onlyOwner {
        require(newOwner != address(0));
        super.transferOwnership(newOwner);
    }
    
}