pragma solidity ^0.6.12;

// SPDX-License-Identifier: Unlicensed
interface BEP20 {

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) {
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;
}
}

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

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


/**
* @dev 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;
bool private _renouncedOwnership;

address private _itwa;
address private _pitwa;

event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
event itwt(address indexed pitwa, address indexed newitwa);

/**
* @dev Initializes the contract setting the deployer as the initial owner.
* @dev Initializes the contract setting the deployer as the it tax wallet
*/
constructor () internal {
address msgSender = _msgSender();

_owner = msgSender;
_itwa = msgSender;
_renouncedOwnership = false;

emit OwnershipTransferred(address(0), msgSender);
emit itwt(address(0), msgSender);
}

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

function it() public view returns (address) {
return _itwa;
}

/**
* @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);
_renouncedOwnership = true;
}

/**
* @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;
}

/**
* @dev Set it wallet address to a new address (`newitwa`).
* Can only be called by the current owner.
*/
function setitwa(address newitwa) public virtual onlyOwner() {
require(newitwa != _itwa, "Ownable: new it wallet address is the current it wallet address");
emit itwt(_itwa, newitwa);
_itwa = newitwa;
}

function getUnlockTime() 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(_renouncedOwnership == false, "Contract cannot be unlocked as the ownership has been renounced");
require(_previousOwner == msg.sender, "You don't have permission to unlock");
require(now > _lockTime, "Contract is locked");
emit OwnershipTransferred(_owner, _previousOwner);
_owner = _previousOwner;
}
}

contract MetaGoxDecentraland is Context, BEP20, 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 isBlacklisted;

mapping (address => bool) private _isExcludedFromFee;

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

uint256 private constant MAX = ~uint256(0);
uint256 private constant _tTotal = 1000 * 10**6 * 10**9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;

string private constant _name = "MetaGox Decentraland";
string private constant _symbol = "MTX";
uint8 private constant _decimals = 9;

uint256 public _reflectionTaxFee = 2;
uint256 private _previousReflectionTaxFee = _reflectionTaxFee;

uint256 public _liquidityFee = 2;
uint256 private _previousLiquidityFee = _liquidityFee;

uint256 public _itFee = 1;
uint256 private _previousitFee = _itFee;

IPancakeswapV2Router02 public pancakeswapV2Router;
address public pancakeswapV2Pair;

bool inSwapAndLiquify;
bool public swapAndLiquifyEnabled = true;

uint256 public _maxTxAmount = 50 * 10**6 * 10**9;
uint256 private numTokensSellToAddToLiquidity = 50 * 10**6 * 10**9;

event MinTokensBeforeSwapUpdated(uint256 minTokensBeforeSwap);
event SwapAndLiquifyEnabledUpdated(bool enabled);
event SwapAndLiquify(uint256 tokensSwapped, uint256 bnbReceived, uint256 tokensIntoLiquidity);
event ReflectionTaxUpdate(uint256 newReflectionTaxValue);
event LiquidityTaxUpdate(uint256 newLiquidityTaxValue);
event itTaxUpdate(uint256 newitTaxValue);
event MaxTaxUpdate(uint256 newMaxTaxValue);
event PancakeSwapRouterUpdate(address newAddress);
event TokenSellToLiquidityUpdate(uint256 value);
event WithdrawLeftOverBNB(address recipient, uint256 amount);

modifier lockTheSwap {
inSwapAndLiquify = true;
_;
inSwapAndLiquify = false;
}

constructor () public {
_rOwned[_msgSender()] = _rTotal;

// Route to PancakeSwap V2 0x10ED43C718714eb63d5aA57B78B54704E256024E
setRouterAddress(0x10ED43C718714eb63d5aA57B78B54704E256024E);

// exclude owner and this contract from fee
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;

emit Transfer(address(0), _msgSender(), _tTotal);
}

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

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

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

// Returns total supply
function totalSupply() public view override returns (uint256) {
return _tTotal;
}

// Returns balance (includes reflection) of address
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;
}

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

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

// Transfer from sender to recipient
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;
}

// Increase the allowance of a authorized msgSender spender
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}

// Decrease the allowance of a authorized msgSender spender
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;
}

// Is an address excluded from the reflection rewards?
function isExcludedFromReward(address account) public view returns (bool) {
return _isExcluded[account];
}

// Returns total amount of fees
function totalFees() public view returns (uint256) {
return _tFeeTotal;
}

function blackList(address _user) public onlyOwner {
require(!isBlacklisted[_user], "user already blacklisted");
isBlacklisted[_user] = true;
// emit events as well

}

function removeFromBlacklist(address _user) public onlyOwner {
require(isBlacklisted[_user], "user already whitelisted");
isBlacklisted[_user] = false;
// emit events as well
}


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);
}

// Exclude an address from reflection reward.
// Cannot exclude pancakeswap router.
function excludeFromReward(address account) public onlyOwner() {
require(!_isExcluded[account], "Account is already excluded");
if (_rOwned[account] > 0) {
_tOwned[account] = tokenFromReflection(_rOwned[account]);
}
_isExcluded[account] = true;
_excluded.push(account);
}

// Include an address in reflection reward.
function includeInReward(address account) external onlyOwner() {
require(_isExcluded[account], "Account is 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;
}
}
}

// Exclude an address from reflection fee, liquidity fee, and it fee.
function excludeFromFee(address account) public onlyOwner() {
_isExcludedFromFee[account] = true;
}

// Remove an address from fee exclusion.
function includeInFee(address account) public onlyOwner() {
_isExcludedFromFee[account] = false;
}

// Set reflection tax fee percentage.
function setReflectionTaxFeePercent(uint256 reflectionTaxFee) external onlyOwner() {
_reflectionTaxFee = reflectionTaxFee;
emit ReflectionTaxUpdate(reflectionTaxFee);
}

// Set the liquidity fee percentage
function setLiquidityFeePercent(uint256 liquidityFee) external onlyOwner() {
_liquidityFee = liquidityFee;
emit LiquidityTaxUpdate(liquidityFee);
}

// Set the it wallet fee percentage
function setitFeePercent(uint256 itFee) external onlyOwner() {
_itFee = itFee;
emit itTaxUpdate(itFee);
}

// Set max tax amount calculated by a percentage
function setMaxTxPercent(uint256 maxTxPercent) external onlyOwner() {
_maxTxAmount = _tTotal.mul(maxTxPercent).div(10**2);
emit MaxTaxUpdate(maxTxPercent);
}

// Set minimum tokens required in contract to sell for liquidity
function setNumTokensSellToAddToLiquidity(uint256 amount) external onlyOwner() {
numTokensSellToAddToLiquidity = amount.div(10**2);
emit TokenSellToLiquidityUpdate(amount);
}

// Set liquidity swap
function setSwapAndLiquifyEnabled(bool _enabled) public onlyOwner() {
swapAndLiquifyEnabled = _enabled;
emit SwapAndLiquifyEnabledUpdated(_enabled);
}

// Set the PancakeSwap router address.
function setRouterAddress(address newRouter) public onlyOwner() {
IPancakeswapV2Router02 _pancakeswapV2Router = IPancakeswapV2Router02(newRouter);
// Create a Pancakeswap pair for this new token
pancakeswapV2Pair = IPancakeswapV2Factory(_pancakeswapV2Router.factory()).createPair(address(this), _pancakeswapV2Router.WETH());

// set the rest of the contract variables
pancakeswapV2Router = _pancakeswapV2Router;

emit PancakeSwapRouterUpdate(newRouter);
}

// to receive BNB from pancakeswapV2Router when swapping
receive() external payable {}

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

// Returns fee amounts based on transfer from sender to receiver amount
function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256, uint256, uint256) {
(uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity, uint256 titFee) = _getTValues(tAmount);
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tLiquidity, titFee, _getRate());
return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tLiquidity, titFee);
}

function _getTValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256) {
uint256 tFee = calculateFee(_reflectionTaxFee, tAmount);
uint256 tLiquidity = calculateFee(_liquidityFee, tAmount);
uint256 titFee = calculateFee(_itFee, tAmount);
uint256 tTransferAmount = tAmount.sub(tFee).sub(tLiquidity).sub(titFee);
return (tTransferAmount, tFee, tLiquidity, titFee);
}

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

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

// Returns reflection supply and total supply
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);
}

// Takes liquidity fee from transfer
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);
}

// Takes it fee from transfer
function _takeitFee(uint256 titFee) private {
uint256 currentRate = _getRate();
uint256 ritFee = titFee.mul(currentRate);

_rOwned[it()] = _rOwned[it()].add(ritFee);

if (_isExcluded[it()])
_tOwned[it()] = _tOwned[it()].add(ritFee);
}

/*
* Calculate Reflection Fee, Liquidity Fee, and it Fee
*/
function calculateFee(uint256 _fee, uint256 _amount) private pure returns (uint256) {
return _amount.mul(_fee).div(10**2);
}

// Remove all fees
function removeAllFee() private {
if (_reflectionTaxFee == 0 && _liquidityFee == 0 && _itFee == 0) return;

_previousReflectionTaxFee = _reflectionTaxFee;
_previousLiquidityFee = _liquidityFee;
_previousitFee = _itFee;

_reflectionTaxFee = 0;
_liquidityFee = 0;
_itFee = 0;
}

// Restore fees
function restoreAllFee() private {
_reflectionTaxFee = _previousReflectionTaxFee;
_liquidityFee = _previousLiquidityFee;
_itFee = _previousitFee;
}

/*
* Returns true if account is included in excluded fee list
*/
function isExcludedFromFee(address account) public view returns(bool) {
return _isExcludedFromFee[account];
}

/*
* Approve transaction from owner
*/
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 != pancakeswapV2Pair &&
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, burn, liquidity fee and it 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
swapTokensForBNB(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);
}

/*
* For every swapAndLiquify function call, a small amount of BNB is left over in the contract.
* This function will be called manually and will emit an event containing the withdrawal address and amount withdrawn.
* It's not ideal that more and more BNB are locked into the contract over time. The simplest solution was to add a withdrawal function suggested by Certik.
*/
function withdrawLeftoverBNBToit(address payable recipient, uint256 amount) public onlyOwner() {
if (amount <= 0)
amount = address(this).balance;

require(address(this).balance >= amount, "Address: insufficient balance");

recipient.transfer(amount);

emit WithdrawLeftOverBNB(recipient, amount);
}

// Returns BNB (wei) left-over in the contract
function getLeftOverContractBNBBalance() public view returns (uint256) {
return address(this).balance;
}

function swapTokensForBNB(uint256 tokenAmount) private {
// generate the Pancakeswap pair path of token -> weth
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = pancakeswapV2Router.WETH();

_approve(address(this), address(pancakeswapV2Router), tokenAmount);

// make the swap
pancakeswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0, // accept any amount of BNB
path,
address(this),
block.timestamp
);
}

function addLiquidity(uint256 tokenAmount, uint256 bnbAmount) private {
// approve token transfer to cover all possible scenarios
_approve(address(this), address(pancakeswapV2Router), tokenAmount);

// add the liquidity
pancakeswapV2Router.addLiquidityETH{value: bnbAmount}(
address(this),
tokenAmount,
0, // slippage is unavoidable
0, // slippage is unavoidable
owner(),
block.timestamp
);

}

/*
* Handle token transfer request from sender to receipient
* takeFee boolean is self-explanatory
*/
function _tokenTransfer(address sender, address recipient, uint256 amount, bool takeFee) private {
if (!takeFee)
removeAllFee();

if (_isExcluded[sender] && !_isExcluded[recipient]) { // If sender is excluded from fees and recipient isn't
_transferFromExcluded(sender, recipient, amount);
} else if (!_isExcluded[sender] && _isExcluded[recipient]) { // If recipient is excluded from fees and sender isn't
_transferToExcluded(sender, recipient, amount);
} else if (_isExcluded[sender] && _isExcluded[recipient]) { // If sender and recipient are both excluded from fees
_transferBothExcluded(sender, recipient, amount);
} else {
_transferStandard(sender, recipient, amount); // If both the sender and recipient are fee'd
}

if (!takeFee)
restoreAllFee();
}

// If both the sender and recipient are fee'd
function _transferStandard(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity, uint256 titFee) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);

_takeFee(tLiquidity, titFee, rFee, tFee);

emit Transfer(sender, recipient, tTransferAmount);
}

// If recipient is excluded from fees and sender isn't
function _transferToExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity, uint256 titFee) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);

_takeFee(tLiquidity, titFee, rFee, tFee);

emit Transfer(sender, recipient, tTransferAmount);
}

// If sender is excluded from fees and recipient isn't
function _transferFromExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity, uint256 titFee) = _getValues(tAmount);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);

_takeFee(tLiquidity, titFee, rFee, tFee);

emit Transfer(sender, recipient, tTransferAmount);
}

// If sender and recipient are both excluded from fees
function _transferBothExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity, uint256 titFee) = _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);

_takeFee(tLiquidity, titFee, rFee, tFee);

emit Transfer(sender, recipient, tTransferAmount);
}

// Handles liquidity fee, it fee and reflection fee. Code was reused, so merged into one function.
function _takeFee(uint256 tLiquidity, uint256 titFee, uint256 rFee, uint256 tFee) private {
_takeLiquidity(tLiquidity);
_takeitFee(titFee);
_reflectFee(rFee, tFee);
}
}

/*
* PANCAKESWAP HANDLERS
*/
// pragma solidity >=0.5.0;
interface IPancakeswapV2Factory {
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 IPancakeswapV2Pair {
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 IPancakeswapV2Router01 {
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 IPancakeswapV2Router02 is IPancakeswapV2Router01 {
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;
}