bukele.sol

/*BUKELE Research Token is an innovative charity-token inspired by Nayib Bukele that aims to power a stronger financial system in the developing world.


  Bukele Token features:
   100% of LP burned at launch
   4% fee auto added to liquidity pool and will be locked
   4% fee auto distributed to all holders
   2% fee added to charity wallet for donation to charity organizations in El Salvador
   
  Visit our website at bukele.io for more information
  Join our Telegram: https://t.me/bukeletoken
 
 Note, this smart contract was forked from SAFEMOON, but changes were made to make it safer by following the
 recommendations listed in the Certik audit of safemoon: https://www.certik.org/projects/safemoon. Additional changes
 were made to make BUKELE Token advantagous for the highest rate of return to holders while maximizing the amount for charitable giving.
*/

pragma solidity ^0.6.12;
// SPDX-License-Identifier: Unlicensed

interface IERC20 {
    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 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, 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) {
    // Solidity only automatically asserts when dividing by 0
    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;
  }
}

/*
 * @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 {
  // Empty internal constructor, to prevent people from mistakenly deploying
  // an instance of this contract, which should be used via inheritance.
  constructor () internal { }

  function _msgSender() internal view returns (address payable) {
    return msg.sender;
  }

  function _msgData() internal view returns (bytes memory) {
    this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
    return msg.data;
  }
}

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // According to EIP-1052, 0x0 is the value returned for not-yet created accounts
        // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
        // for accounts without code, i.e. `keccak256('')`
        bytes32 codehash;
        bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
        // solhint-disable-next-line no-inline-assembly
        assembly { codehash := extcodehash(account) }
        return (codehash != accountHash && codehash != 0x0);
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
        (bool success, ) = recipient.call{ value: amount }("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain`call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
      return functionCall(target, data, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
        return _functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        return _functionCallWithValue(target, data, value, errorMessage);
    }

    function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
        require(isContract(target), "Address: call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly

                // solhint-disable-next-line no-inline-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

/**
 * @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.
 */
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 () internal {
        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;
    }

    function geUnlockTime() public view returns (uint256) {
        return _lockTime;
    }

    //Locks the contract for owner for the amount of time provided
    function lock(uint256 time) public virtual onlyOwner {
        _previousOwner = _owner;
        _owner = address(0);
        _lockTime = now + time;
        emit OwnershipTransferred(_owner, address(0));
    }
    
    //Unlocks the contract for owner when _lockTime is exceeds
    function unlock() public virtual {
        require(_previousOwner == msg.sender, "You don't have permission to unlock");
        require(now > _lockTime , "Contract is locked until 7 days");
        emit OwnershipTransferred(_owner, _previousOwner);
        _owner = _previousOwner;
    }
}

// pragma solidity >=0.5.0;

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;
}


// pragma solidity >=0.5.0;

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;
}

// pragma solidity >=0.6.2;

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);
}



// pragma solidity >=0.6.2;

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;
}

/* BUKELE is a fork of SafeMoon that has been optimized to give charity to organizations in El Salvador
*/
contract BUKELE is Context, IERC20, Ownable {
  using SafeMath for uint256;
  using Address for address;

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

  mapping (address => bool) private _isExcludedFromFee;

  mapping (address => bool) private _isExcluded;
  address[] private _excluded;

  address payable charityWallet = 0x93F0b137673dbAB28041AdDc1e1863542E00c367;

  /* Variables _tTotal, _name, _symbol, _decimals, and numTokensSellToAddToLiquidity
     changed to constant.
     See "SSL-05 | Variable could be declared as constant" from the Certik 
     audit of Safemoon.
  */
  uint256 private constant MAX = ~uint256(0);
  uint256 private constant _tTotal = 1000000000 * 10**6 * 10**9;
  uint256 private _rTotal = (MAX - (MAX % _tTotal));
  uint256 private _tFeeTotal;
  
  string private constant _name = "Bukele Token";
  string private constant _symbol = "BUKELE";
  uint8 private constant _decimals = 9;
  
  uint256 public _taxFee = 4;
  uint256 private _previousTaxFee = _taxFee;

  uint256 public _devFee = 2;
  uint256 private _previousDevFee = _devFee;

  uint256 public _liquidityFee = 4;
  uint256 private _previousLiquidityFee = _liquidityFee;
  
  IUniswapV2Router02 public uniswapV2Router;
  address public uniswapV2Pair;
  
  bool inSwapAndLiquify;
  bool public swapAndLiquifyEnabled = true;
  
  uint256 public _maxTxAmount = 5000000 * 10**6 * 10**9;
  uint256 private numTokensSellToAddToLiquidity = 500000 * 10**6 * 10**9;
  
  event MinTokensBeforeSwapUpdated(uint256 minTokensBeforeSwap);
  event SwapAndLiquifyEnabledUpdated(bool enabled);
  event SwapAndLiquify(
      uint256 tokensSwapped,
      uint256 ethReceived,
      uint256 tokensIntoLiquidity
  );
  event AddLiquidityETH(uint amountA, uint amountB, uint liquidity);

  modifier lockTheSwap {
      inSwapAndLiquify = true;
      _;
      inSwapAndLiquify = false;
  }
  
  constructor () public {
      _rOwned[_msgSender()] = _rTotal;
      
      IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x10ED43C718714eb63d5aA57B78B54704E256024E);// v2 testnet 0xD99D1c33F9fC3444f8101754aBC46c52416550D1
        // Create a pancakeswap pair for this new token 
      uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
          .createPair(address(this), _uniswapV2Router.WETH());

      // set the rest of the contract variables
      uniswapV2Router = _uniswapV2Router;
      
      //exclude owner and this contract from fee
      _isExcludedFromFee[owner()] = true;
      _isExcludedFromFee[address(this)] = true;
      emit Transfer(address(0), _msgSender(), _tTotal);
  }

  function name() public pure returns (string memory) {
      return _name;
  }

  function symbol() public pure returns (string memory) {
      return _symbol;
  }

  function decimals() public pure returns (uint8) {
      return _decimals;
  }

  function totalSupply() public view override returns (uint256) {
      return _tTotal;
  }

  function balanceOf(address account) public view override returns (uint256) {
      if (_isExcluded[account]) return _tOwned[account];
      return tokenFromReflection(_rOwned[account]);
  }

  function transfer(address recipient, uint256 amount) public override returns (bool) {
      _transfer(_msgSender(), recipient, amount);
      return true;
  }

  function allowance(address owner, address spender) public view override returns (uint256) {
      return _allowances[owner][spender];
  }

  function approve(address spender, uint256 amount) public override returns (bool) {
      _approve(_msgSender(), spender, amount);
      return true;
  }

  function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
      _transfer(sender, recipient, amount);
      _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "BEP20: transfer amount exceeds allowance"));
      return true;
  }

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

  function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
      _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "BEP20: decreased allowance below zero"));
      return true;
  }

  function isExcludedFromReward(address account) public view returns (bool) {
      return _isExcluded[account];
  }

  function totalFees() public view returns (uint256) {
      return _tFeeTotal;
  }

  /* removed function due to security concerns
     See "SSL-12 | The purpose of function deliver" from the Certik audit of safemoon
     
  function deliver(uint256 tAmount) public {
      address sender = _msgSender();
      require(!_isExcluded[sender], "Excluded addresses cannot call this function");
      (uint256 rAmount,,,,,,) = _getValues(tAmount);
      _rOwned[sender] = _rOwned[sender].sub(rAmount);
      _rTotal = _rTotal.sub(rAmount);
      _tFeeTotal = _tFeeTotal.add(tAmount);
  }
  */

  function reflectionFromToken(uint256 tAmount, bool deductTransferFee) public view returns(uint256) {
      require(tAmount <= _tTotal, "Amount must be less than supply");
      if (!deductTransferFee) {
          (uint256 rAmount,,,,,,) = _getValues(tAmount);
          return rAmount;
      } else {
          (,uint256 rTransferAmount,,,,,) = _getValues(tAmount);
          return rTransferAmount;
      }
  }

  function tokenFromReflection(uint256 rAmount) public view returns(uint256) {
      require(rAmount <= _rTotal, "Amount must be less than total reflections");
      uint256 currentRate =  _getRate();
      return rAmount.div(currentRate);
  }

  function excludeFromReward(address account) public onlyOwner() {
      // require(account != 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D, 'We can not exclude Pancakeswap router.');
      require(!_isExcluded[account], "Account is already excluded");
      if(_rOwned[account] > 0) {
          _tOwned[account] = tokenFromReflection(_rOwned[account]);
      }
      _isExcluded[account] = true;
      _excluded.push(account);
  }

  function includeInReward(address account) external onlyOwner() {
      /* Changed error message to "Account not excluded"
         See "SSL-01 | Incorrect error message" from the Certik
         audit of safemoon.
      */
      require(_isExcluded[account], "Account not excluded");
      for (uint256 i = 0; i < _excluded.length; i++) {
          if (_excluded[i] == account) {
              _excluded[i] = _excluded[_excluded.length - 1];
              _tOwned[account] = 0;
              _isExcluded[account] = false;
              _excluded.pop();
              break;
          }
      }
  }
  function _transferBothExcluded(address sender, address recipient, uint256 tAmount) private {
      (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity, uint256 tDev) = _getValues(tAmount);
      _tOwned[sender] = _tOwned[sender].sub(tAmount);
      _rOwned[sender] = _rOwned[sender].sub(rAmount);
      _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
      _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);        
      _takeLiquidity(tLiquidity);
      _takeDev(tDev);
      _reflectFee(rFee, tFee);
      emit Transfer(sender, recipient, tTransferAmount);
  }
  
  function excludeFromFee(address account) public onlyOwner {
      _isExcludedFromFee[account] = true;
  }
  
  function includeInFee(address account) public onlyOwner {
      _isExcludedFromFee[account] = false;
  }
  
  function setTaxFeePercent(uint256 taxFee) external onlyOwner() {
      _taxFee = taxFee;
  }
  
  function setDevFeePercent(uint256 devFee) external onlyOwner() {
      _devFee = devFee;
  }

  function setLiquidityFeePercent(uint256 liquidityFee) external onlyOwner() {
      _liquidityFee = liquidityFee;
  }
  
  function setMaxTxPercent(uint256 maxTxPercent) external onlyOwner() {
      _maxTxAmount = _tTotal.mul(maxTxPercent).div(
          10**2
      );
  }

  function setSwapAndLiquifyEnabled(bool _enabled) public onlyOwner {
      swapAndLiquifyEnabled = _enabled;
      emit SwapAndLiquifyEnabledUpdated(_enabled);
  }
  
  //to recieve BNB from pancakeswapV2Router when swaping
  receive() external payable {}

  function _reflectFee(uint256 rFee, uint256 tFee) private {
      _rTotal = _rTotal.sub(rFee);
      _tFeeTotal = _tFeeTotal.add(tFee);
  }

  function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256, uint256, uint256) {
      (uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity, uint tDev) = _getTValues(tAmount);
      (uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tLiquidity, tDev, _getRate());
      return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tLiquidity, tDev);
  }

  function _getTValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256) {
      uint256 tFee = calculateTaxFee(tAmount);
      uint256 tDev = calculateDevFee(tAmount);
      uint256 tLiquidity = calculateLiquidityFee(tAmount);
      uint256 tTransferAmount = tAmount.sub(tFee).sub(tLiquidity).sub(tDev);
      return (tTransferAmount, tFee, tLiquidity, tDev);
  }

  function _getRValues(uint256 tAmount, uint256 tFee, uint256 tLiquidity, uint256 tDev, uint256 currentRate) private pure returns (uint256, uint256, uint256) {
      uint256 rAmount = tAmount.mul(currentRate);
      uint256 rFee = tFee.mul(currentRate);
      uint256 rLiquidity = tLiquidity.mul(currentRate);
      uint256 rDev = tDev.mul(currentRate);
      uint256 rTransferAmount = rAmount.sub(rFee).sub(rLiquidity).sub(rDev);
      return (rAmount, rTransferAmount, rFee);
  }

  function _getRate() private view returns(uint256) {
      (uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
      return rSupply.div(tSupply);
  }

  function _getCurrentSupply() private view returns(uint256, uint256) {
      uint256 rSupply = _rTotal;
      uint256 tSupply = _tTotal;      
      for (uint256 i = 0; i < _excluded.length; i++) {
          if (_rOwned[_excluded[i]] > rSupply || _tOwned[_excluded[i]] > tSupply) return (_rTotal, _tTotal);
          rSupply = rSupply.sub(_rOwned[_excluded[i]]);
          tSupply = tSupply.sub(_tOwned[_excluded[i]]);
      }
      if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
      return (rSupply, tSupply);
  }
  
  function _takeLiquidity(uint256 tLiquidity) private {
      uint256 currentRate =  _getRate();
      uint256 rLiquidity = tLiquidity.mul(currentRate);
      _rOwned[address(this)] = _rOwned[address(this)].add(rLiquidity);
      if(_isExcluded[address(this)])
          _tOwned[address(this)] = _tOwned[address(this)].add(tLiquidity);
  }
  
  function _takeDev(uint256 tDev) private {
      uint256 currentRate =  _getRate();
      uint256 rDev = tDev.mul(currentRate);
      _rOwned[charityWallet] = _rOwned[charityWallet].add(rDev);
      if(_isExcluded[charityWallet])
          _tOwned[charityWallet] = _tOwned[charityWallet].add(tDev);
  }

  function calculateTaxFee(uint256 _amount) private view returns (uint256) {
      return _amount.mul(_taxFee).div(
          10**2
      );
  }

  function calculateDevFee(uint256 _amount) private view returns (uint256) {
      return _amount.mul(_devFee).div(
          10**2
      );
  }

  function calculateLiquidityFee(uint256 _amount) private view returns (uint256) {
      return _amount.mul(_liquidityFee).div(
          10**2
      );
  }
  
  function removeAllFee() private {
      if(_taxFee == 0 && _liquidityFee == 0 && _devFee == 0) return;
      
      _previousTaxFee = _taxFee;
      _previousLiquidityFee = _liquidityFee;
      _previousDevFee = _devFee;
      
      _taxFee = 0;
      _liquidityFee = 0;
      _devFee = 0;
  }
  
  function restoreAllFee() private {
      _taxFee = _previousTaxFee;
      _liquidityFee = _previousLiquidityFee;
      _devFee = _previousDevFee;
  }
  
  function isExcludedFromFee(address account) public view returns(bool) {
      return _isExcludedFromFee[account];
  }

  function _approve(address owner, address spender, uint256 amount) private {
      require(owner != address(0), "BEP20: approve from the zero address");
      require(spender != address(0), "BEP20: approve to the zero address");

      _allowances[owner][spender] = amount;
      emit Approval(owner, spender, amount);
  }

  function _transfer(
      address from,
      address to,
      uint256 amount
  ) private {
      require(from != address(0), "BEP20: transfer from the zero address");
      require(to != address(0), "BEP20: transfer to the zero address");
      require(amount > 0, "Transfer amount must be greater than zero");
      if(from != owner() && to != owner())
          require(amount <= _maxTxAmount, "Transfer amount exceeds the maxTxAmount.");

      // is the token balance of this contract address over the min number of
      // tokens that we need to initiate a swap + liquidity lock?
      // also, don't get caught in a circular liquidity event.
      // also, don't swap & liquify if sender is pancakeswap pair.
      uint256 contractTokenBalance = balanceOf(address(this));
      
      if(contractTokenBalance >= _maxTxAmount)
      {
          contractTokenBalance = _maxTxAmount;
      }
      
      bool overMinTokenBalance = contractTokenBalance >= numTokensSellToAddToLiquidity;
      if (
          overMinTokenBalance &&
          !inSwapAndLiquify &&
          from != uniswapV2Pair &&
          swapAndLiquifyEnabled
      ) {
          contractTokenBalance = numTokensSellToAddToLiquidity;
          //add liquidity
          swapAndLiquify(contractTokenBalance);
      }
      
      //indicates if fee should be deducted from transfer
      bool takeFee = true;
      
      //if any account belongs to _isExcludedFromFee account then remove the fee
      if(_isExcludedFromFee[from] || _isExcludedFromFee[to]){
          takeFee = false;
      }
      
      //transfer amount, it will take tax, dev, liquidity fee
      _tokenTransfer(from,to,amount,takeFee);
  }

  function swapAndLiquify(uint256 contractTokenBalance) private lockTheSwap {
      // split the contract balance into halves
      uint256 half = contractTokenBalance.div(2);
      uint256 otherHalf = contractTokenBalance.sub(half);

      // capture the contract's current BNB balance.
      // this is so that we can capture exactly the amount of BNB that the
      // swap creates, and not make the liquidity event include any BNB that
      // has been manually sent to the contract
      uint256 initialBalance = address(this).balance;

      // swap tokens for BNB
      swapTokensForETH(half); // <- this breaks the BNB -> HATE swap when swap+liquify is triggered

      // how much BNB did we just swap into?
      uint256 newBalance = address(this).balance.sub(initialBalance);

      // add liquidity to pancakeswap
      addLiquidity(otherHalf, newBalance);
      
      emit SwapAndLiquify(half, newBalance, otherHalf);
  }

  function buyBUKELEWithLeftoverBNB(uint256 amount) external onlyOwner() {
      // buy back BUKELE with BNB leftover from SwapAndLiquify to increase BUKELE price
      // see "SSL- 03 | Contract gains non-withdrawable BNB via the swapAndLiquifyfunction"
      // from Safemoon Certik Audit
      address[] memory path = new address[](2);
      path[0] = uniswapV2Router.WETH();
      path[1] = address(this);
      
      _approve(address(this), address(uniswapV2Router), amount);
      
      uniswapV2Router.swapExactETHForTokensSupportingFeeOnTransferTokens(
        amount,
        path,
        address(this),
        block.timestamp
      );
  }
  
  function swapTokensForETH(uint256 tokenAmount) private {
      // generate the pancakeswap pair path of token -> WBNB
      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 BNB
          path,
          address(this),
          block.timestamp
      );
  }

  function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
      // approve token transfer to cover all possible scenarios
      /* "to" account changed to address(this) to mitigate major centralization
         issue in Safemoon's contract.
         See "SSL-04 | Centralized risk in addLiquidity" from the Certik
         audit of Safemoon.
      */
      _approve(address(this), address(uniswapV2Router), tokenAmount);

         // add the liquidity
      uniswapV2Router.addLiquidityETH{value: ethAmount}(
            address(this),
            tokenAmount,
            0, // slippage is unavoidable
            0, // slippage is unavoidable
            address(this),
            block.timestamp
        );
      //emit AddLiquidityETH(amountA, amountB, liquidity);
  }

  //this method is responsible for taking all fee, if takeFee is true
  function _tokenTransfer(address sender, address recipient, uint256 amount,bool takeFee) private {
      /* Removed:
         ".....else  if  (!_isExcluded[sender]  &&  !_isExcluded[recipient])  {{        
                         _transferStandard(sender, recipient, amount);  }....."
                         
        See "SSL-02 | Redundant code" from the Certik audit of Safemoon
      */
      if(!takeFee)
          removeAllFee();
      
      if (_isExcluded[sender] && !_isExcluded[recipient]) {
          _transferFromExcluded(sender, recipient, amount);
      } else if (!_isExcluded[sender] && _isExcluded[recipient]) {
          _transferToExcluded(sender, recipient, amount);
      } else if (_isExcluded[sender] && _isExcluded[recipient]) {
          _transferBothExcluded(sender, recipient, amount);
      } else {
          _transferStandard(sender, recipient, amount);
      }
      
      if(!takeFee)
          restoreAllFee();
  }

  function _transferStandard(address sender, address recipient, uint256 tAmount) private {
      (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity, uint256 tDev) = _getValues(tAmount);
      _rOwned[sender] = _rOwned[sender].sub(rAmount);
      _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
      _takeLiquidity(tLiquidity);
      _takeDev(tDev);
      _reflectFee(rFee, tFee);
      emit Transfer(sender, recipient, tTransferAmount);
  }

  function _transferToExcluded(address sender, address recipient, uint256 tAmount) private {
      (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity, uint256 tDev) = _getValues(tAmount);
      _rOwned[sender] = _rOwned[sender].sub(rAmount);
      _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
      _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);           
      _takeLiquidity(tLiquidity);
      _takeDev(tDev);
      _reflectFee(rFee, tFee);
      emit Transfer(sender, recipient, tTransferAmount);
  }

  function _transferFromExcluded(address sender, address recipient, uint256 tAmount) private {
      (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity, uint256 tDev) = _getValues(tAmount);
      _tOwned[sender] = _tOwned[sender].sub(tAmount);
      _rOwned[sender] = _rOwned[sender].sub(rAmount);
      _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);   
      _takeLiquidity(tLiquidity);
      _takeDev(tDev);
      _reflectFee(rFee, tFee);
      emit Transfer(sender, recipient, tTransferAmount);
  }
  //New Pancakeswap router version?
  //No problem, just change it!
  function setRouterAddress(address newRouter) external onlyOwner() {
      IUniswapV2Router02 _uniswapV2newRouter = IUniswapV2Router02(newRouter);//v2 router --> 0x10ED43C718714eb63d5aA57B78B54704E256024E
      // Create a pancakeswap pair for this new token 
      uniswapV2Pair = IUniswapV2Factory(_uniswapV2newRouter.factory())
            .createPair(address(this), _uniswapV2newRouter.WETH());

      // set the rest of the contract variables
      uniswapV2Router = _uniswapV2newRouter;
      
    }
    
  function setCharityWallet(address payable newWallet) external onlyOwner(){
      // in case the charity wallet needs to be updated
      charityWallet = newWallet;
  }
  function getMaxTxAmount() external view onlyOwner() returns(uint256){
      return _maxTxAmount;
  }

}