pragma solidity 0.8.10;
pragma experimental ABIEncoderV2;

// SPDX-License-Identifier: MIT
// ORIGINAL SHINRAI CODE

interface IBEP20 {
function totalSupply() external view returns (uint256);

function balanceOf(address _account) external view returns (uint256);

function transfer(address recipient, uint256 amount)
external
returns (bool);

function allowance(address owner, address spender)
external
view
returns (uint256);

function approve(address spender, uint256 amount) external returns (bool);

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
);
}

// Dex Factory contract interface
interface IDexFactory {
function createPair(address tokenA, address tokenB)
external
returns (address pair);
}

// Dex Router02 contract interface
interface IDexRouter {
function factory() external pure returns (address);

function WETH() external pure returns (address);

function addLiquidityETH(
address token,
uint256 amountTokenDesired,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
)
external
payable
returns (
uint256 amountToken,
uint256 amountETH,
uint256 liquidity
);

function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
}

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

function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}

abstract 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() {
_setOwner(_msgSender());
}

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

/**
* @dev Throws if called by any _account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}

function renounceOwnership() public virtual onlyOwner {
_setOwner(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"
);
_setOwner(newOwner);
}

/**
* @dev set the owner for the first time.
* Can only be called by the contract or deployer.
*/
function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}


library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a b;
require(c >= a, "SafeMath: addition overflow");

return c;
}

function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}

function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;

return c;
}

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;
}

function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by 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;
}

function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}

function mod(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}

contract SHINRAI is Context, IBEP20, Ownable {
using SafeMath for uint256;

// all private variables and functions are only for contract use
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 _isExcludedFromReward;
mapping(address => bool) private _isExcludedFromMaxHoldLimit;
mapping(address => bool) private _isExcludedFromMinBuyLimit;
mapping(address => bool) public isSniper;

uint256 private constant MAX = ~uint256(0);
uint256 private _tTotal = 1000000000000000 * 1e9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;

string private _name = "Shinrai Inu"; // token name
string private _symbol = "SHINRAI"; // token ticker
uint8 private _decimals = 9; // token decimals

IDexRouter public dexRouter; // Dex router address
address public dexPair; // LP token address
address payable public marketWallet; // market wallet address
address public burnAddress = (0x000000000000000000000000000000000000dEaD);

uint256 public minTokenToSwap = 1250000000000 * 1e9; // 10000k amount will trigger the swap and add liquidity
uint256 public maxHoldingAmount = 20000000000000 * 1e9;
uint256 public minBuyLimit = 10000000000000 * 1e9;

uint256 private excludedTSupply; // for contract use
uint256 private excludedRSupply; // for contract use

bool public swapAndLiquifyEnabled = true; // should be true to turn on to liquidate the pool
bool public Fees = true;
bool public antiBotStopEnabled = false;
bool public isMaxHoldLimitValid = true; // max Holding Limit is valid if it's true

// buy tax fee
uint256 public reflectionFeeOnBuying = 10;
uint256 public liquidityFeeOnBuying = 20;
uint256 public marketWalletFeeOnBuying = 45;
uint256 public burnFeeOnBuying = 5;

// sell tax fee
uint256 public reflectionFeeOnSelling = 10;
uint256 public liquidityFeeOnSelling = 20;
uint256 public marketWalletFeeOnSelling = 45;
uint256 public burnFeeOnSelling = 5;

// for smart contract use
uint256 private _currentReflectionFee;
uint256 private _currentLiquidityFee;
uint256 private _currentmarketWalletFee;
uint256 private _currentBurnFee;

uint256 private _accumulatedLiquidity;
uint256 private _accumulatedMarketWallet;

//Events for blockchain
event SwapAndLiquifyEnabledUpdated(bool enabled);
event AntiBotStopEnableUpdated(bool enabled);

event SwapAndLiquify(
uint256 tokensSwapped,
uint256 bnbReceived,
uint256 tokensIntoLiqudity
);

// constructor for initializing the contract
constructor(address payable _marketWallet) {
_rOwned[owner()] = _rTotal;
marketWallet = _marketWallet;

IDexRouter _dexRouter = IDexRouter(
0x10ED43C718714eb63d5aA57B78B54704E256024E
// 0x9Ac64Cc6e4415144C455BD8E4837Fea55603e5c3 //testnet
);
// Create a Dex pair for this new token
dexPair = IDexFactory(_dexRouter.factory()).createPair(
address(this),
_dexRouter.WETH()
);

// set the rest of the contract variables
dexRouter = _dexRouter;

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

// exclude addresses from max holding limit
_isExcludedFromMaxHoldLimit[owner()] = true;
_isExcludedFromMaxHoldLimit[address(this)] = true;
_isExcludedFromMaxHoldLimit[dexPair] = true;
_isExcludedFromMaxHoldLimit[burnAddress] = true;

_isExcludedFromMinBuyLimit[owner()] = true;
_isExcludedFromMinBuyLimit[dexPair] = true;

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

// token standards by Blockchain

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

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

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

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

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

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

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


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) {
require(!isSniper[sender], "Sniper detected");
require(!isSniper[recipient], "Sniper detected");
require(!antiBotStopEnabled, "Trading shifted for bot deletion.");

_transfer(sender, recipient, amount);
_approve(
sender,
_msgSender(),
_allowances[sender][_msgSender()].sub(
amount,
"Token: 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,
"Token: decreased allowance below zero"
)
);
return true;
}

// public view able functions

// to check wether the address is excluded from reward or not
function isExcludedFromReward(address _account) public view returns (bool) {
return _isExcludedFromReward[_account];
}

// to check how much tokens get redistributed among holders till now
function totalHolderDistribution() public view returns (uint256) {
return _tFeeTotal;
}

// to check wether the address is excluded from fee or not
function isExcludedFromFee(address _account) public view returns (bool) {
return _isExcludedFromFee[_account];
}
// to check wether the address is excluded from max Holding or not
function isExcludedFromMaxHoldLimit(address _account)
public
view
returns (bool)
{
return _isExcludedFromMaxHoldLimit[_account];
}

// to check wether the address is excluded from max txn or not
function isExcludedFromMaxTxnLimit(address _account)
public
view
returns (bool)
{
return _isExcludedFromMinBuyLimit[_account];
}

// For manual distribution to the holders
function deliver(uint256 tAmount) public {
address sender = _msgSender();
require(
!_isExcludedFromReward[sender],
"Token: Excluded addresses cannot call this function"
);
uint256 rAmount = tAmount.mul(_getRate());
_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, "BEP20: Amount must be less than supply");
if (!deductTransferFee) {
uint256 rAmount = tAmount.mul(_getRate());
return rAmount;
} else {
uint256 rAmount = tAmount.mul(_getRate());
uint256 rTransferAmount = rAmount.sub(
totalFeePerTx(tAmount).mul(_getRate())
);
return rTransferAmount;
}
}

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

//to include or exludde any address from max hold limit
function includeOrExcludeFromMaxHoldLimit(address _address, bool value)
public
onlyOwner
{
_isExcludedFromMaxHoldLimit[_address] = value;
}

//to include or exludde any address from max hold limit
function includeOrExcludeFromMaxTxnLimit(address _address, bool value)
public
onlyOwner
{
_isExcludedFromMinBuyLimit[_address] = value;
}

//only owner can change sniper shift
function setAntiBotStopEnabled(bool _state) public onlyOwner {
antiBotStopEnabled = _state;
emit AntiBotStopEnableUpdated(_state);
}

//only owner can change MaxHoldingAmount
function setMaxHoldingAmount(uint256 _amount) public onlyOwner {
maxHoldingAmount = _amount;
}

//only owner can change MaxHoldingAmount
function setMinBuyLimit(uint256 _amount) public onlyOwner {
minBuyLimit = _amount;
}

// owner can remove stuck tokens in case of any issue
function removeStuckToken(address _token, uint256 _amount)
external
onlyOwner
{
IBEP20(_token).transfer(owner(), _amount);
}

//only owner can change SellFeePercentages any time after deployment
function setSellFeePercent(
uint256 _redistributionFee,
uint256 _liquidityFee,
uint256 _marketWalletFee,
uint256 _burnFee
) external onlyOwner {
reflectionFeeOnSelling = _redistributionFee;
liquidityFeeOnSelling = _liquidityFee;
marketWalletFeeOnSelling = _marketWalletFee;
burnFeeOnSelling = _burnFee;
}

//to include or exludde any address from fee
function includeOrExcludeFromFee(address _account, bool _value)
public
onlyOwner
{
_isExcludedFromFee[_account] = _value;
}

//only owner can change MinTokenToSwap
function setMinTokenToSwap(uint256 _amount) public onlyOwner {
minTokenToSwap = _amount;
}

//only owner can change BuyFeePercentages any time after deployment
function setBuyFeePercent(
uint256 _redistributionFee,
uint256 _liquidityFee,
uint256 _marketWalletFee,
uint256 _burnFee
) external onlyOwner {
reflectionFeeOnBuying = _redistributionFee;
liquidityFeeOnBuying = _liquidityFee;
marketWalletFeeOnBuying = _marketWalletFee;
burnFeeOnBuying = _burnFee;
}


//only owner can change state of swapping, he can turn it in to true or false any time after deployment
function enableOrDisableSwapAndLiquify(bool _state) public onlyOwner {
swapAndLiquifyEnabled = _state;
emit SwapAndLiquifyEnabledUpdated(_state);
}

//To enable or disable all fees when set it to true fees will be disabled
function enableOrDisableFees(bool _state) external onlyOwner {
Fees = _state;
}

// owner can change market address
function setmarketWalletAddress(address payable _newAddress)
external
onlyOwner
{
marketWallet = _newAddress;
}

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

// internal functions for contract use

function totalFeePerTx(uint256 tAmount) internal view returns (uint256) {
uint256 percentage = tAmount
.mul(
_currentReflectionFee.add(_currentLiquidityFee).add(
_currentmarketWalletFee.add(_currentBurnFee)
)
)
.div(1e3);
return percentage;
}

function _checkMaxWalletAmount(address to, uint256 amount) private view{
if (
!_isExcludedFromMaxHoldLimit[to] // by default false
) {
if (isMaxHoldLimitValid) {
require(
balanceOf(to).add(amount) <= maxHoldingAmount,
"BEP20: amount exceed max holding limit"
);
}
}
}


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

function setBuyFee() private {
_currentReflectionFee = reflectionFeeOnBuying;
_currentLiquidityFee = liquidityFeeOnBuying;
_currentmarketWalletFee = marketWalletFeeOnBuying;
_currentBurnFee = burnFeeOnBuying;
}

function _getCurrentSupply() private view returns (uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
rSupply = rSupply.sub(excludedRSupply);
tSupply = tSupply.sub(excludedTSupply);
if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}

function removeAllFee() private {
_currentReflectionFee = 0;
_currentLiquidityFee = 0;
_currentmarketWalletFee = 0;
_currentBurnFee = 0;
}

function setSellFee() private {
_currentReflectionFee = reflectionFeeOnSelling;
_currentLiquidityFee = liquidityFeeOnSelling;
_currentmarketWalletFee = marketWalletFeeOnSelling;
_currentBurnFee = burnFeeOnSelling;
}

function addSniperInList(address _account) external onlyOwner {
require(_account != address(dexRouter), "We can not blacklist router");
require(!isSniper[_account], "Sniper already exist");
isSniper[_account] = true;
}

function removeSniperFromList(address _account) external onlyOwner {
require(isSniper[_account], "Not a sniper");
isSniper[_account] = false;
}

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

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

// base function to transfer tokens
function _transfer(
address from,
address to,
uint256 amount
) private {
require(from != address(0), "Token: transfer from the zero address");
require(to != address(0), "Token: transfer to the zero address");
require(amount > 0, "Token: transfer amount must be greater than zero");

// swap and liquify
swapAndLiquify(from, to);

//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] || !Fees) {
takeFee = false;
}

//transfer amount, it will take tax, burn, liquidity fee
_tokenTransfer(from, to, amount, takeFee);
}

//this method is responsible for taking all fee, if takeFee is true
function _tokenTransfer(
address sender,
address recipient,
uint256 amount,
bool takeFee
) private {
// buying handler
require(!isSniper[sender], "Sniper detected");
require(!isSniper[recipient], "Sniper detected");
require(!antiBotStopEnabled, "Trading shifted for bot deletion.");

if(!_isExcludedFromMinBuyLimit[recipient]){
require(amount <= minBuyLimit,"Amount must be greater than minimum buy Limit" );
}
if (sender == dexPair && takeFee) {
setBuyFee();
}
// selling handler
else if (recipient == dexPair && takeFee) {
setSellFee();
}
// normal transaction handler
else {
removeAllFee();
}

// check if sender or reciver excluded from reward then do transfer accordingly
if (
_isExcludedFromReward[sender] && !_isExcludedFromReward[recipient]
) {
_transferFromExcluded(sender, recipient, amount);
} else if (
!_isExcludedFromReward[sender] && _isExcludedFromReward[recipient]
) {
_transferToExcluded(sender, recipient, amount);
} else if (
_isExcludedFromReward[sender] && _isExcludedFromReward[recipient]
) {
_transferBothExcluded(sender, recipient, amount);
} else {
_transferStandard(sender, recipient, amount);
}
}

// if both sender and receiver are not excluded from reward
function _transferStandard(
address sender,
address recipient,
uint256 tAmount
) private {
uint256 currentRate = _getRate();
uint256 tTransferAmount = tAmount.sub(totalFeePerTx(tAmount));
uint256 rAmount = tAmount.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(
totalFeePerTx(tAmount).mul(currentRate)
);
_checkMaxWalletAmount(recipient, tTransferAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeAllFee(sender,tAmount, currentRate);
_takeBurnFee(sender,tAmount, currentRate);
_reflectFee(tAmount);
emit Transfer(sender, recipient, tTransferAmount);
}

// if sender is excluded from reward
function _transferFromExcluded(
address sender,
address recipient,
uint256 tAmount
) private {
uint256 currentRate = _getRate();
uint256 tTransferAmount = tAmount.sub(totalFeePerTx(tAmount));
uint256 rAmount = tAmount.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(
totalFeePerTx(tAmount).mul(currentRate)
);
_checkMaxWalletAmount(recipient, tTransferAmount);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
excludedTSupply = excludedTSupply.sub(tAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeAllFee(sender,tAmount, currentRate);
_takeBurnFee(sender,tAmount, currentRate);
_reflectFee(tAmount);

emit Transfer(sender, recipient, tTransferAmount);
}

// if both sender and receiver are excluded from reward
function _transferBothExcluded(
address sender,
address recipient,
uint256 tAmount
) private {
uint256 currentRate = _getRate();
uint256 tTransferAmount = tAmount.sub(totalFeePerTx(tAmount));
_checkMaxWalletAmount(recipient, tTransferAmount);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
excludedTSupply = excludedTSupply.sub(tAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
excludedTSupply = excludedTSupply.add(tAmount);
_takeAllFee(sender,tAmount, currentRate);
_takeBurnFee(sender,tAmount, currentRate);
_reflectFee(tAmount);

emit Transfer(sender, recipient, tTransferAmount);
}

// if receiver is excluded from reward
function _transferToExcluded(
address sender,
address recipient,
uint256 tAmount
) private {
uint256 currentRate = _getRate();
uint256 tTransferAmount = tAmount.sub(totalFeePerTx(tAmount));
uint256 rAmount = tAmount.mul(currentRate);
_checkMaxWalletAmount(recipient, tTransferAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
excludedTSupply = excludedTSupply.add(tAmount);
_takeAllFee(sender,tAmount, currentRate);
_takeBurnFee(sender,tAmount, currentRate);
_reflectFee(tAmount);

emit Transfer(sender, recipient, tTransferAmount);
}

// for automatic redistribution among all holders on each tx
function _reflectFee(uint256 tAmount) private {
uint256 tFee = tAmount.mul(_currentReflectionFee).div(1e3);
uint256 rFee = tFee.mul(_getRate());
_rTotal = _rTotal.sub(rFee);
_tFeeTotal = _tFeeTotal.add(tFee);
}

// take fees for liquidity, market/dev
function _takeAllFee(address sender,uint256 tAmount, uint256 currentRate) internal {
uint256 tFee = tAmount
.mul(_currentLiquidityFee.add(_currentmarketWalletFee))
.div(1e3);

if (tFee > 0) {
_accumulatedLiquidity = _accumulatedLiquidity.add(
tAmount.mul(_currentLiquidityFee).div(1e3)
);
_accumulatedMarketWallet = _accumulatedMarketWallet.add(
tAmount.mul(_currentmarketWalletFee).div(1e3)
);

uint256 rFee = tFee.mul(currentRate);
if (_isExcludedFromReward[address(this)])
_tOwned[address(this)] = _tOwned[address(this)].add(tFee);
else _rOwned[address(this)] = _rOwned[address(this)].add(rFee);

emit Transfer(sender, address(this), tFee);
}
}
function _takeBurnFee(address sender,uint256 tAmount, uint256 currentRate) internal {
uint256 burnFee = tAmount.mul(_currentBurnFee).div(1e3);
uint256 rBurnFee = burnFee.mul(currentRate);
_rOwned[burnAddress] = _rOwned[burnAddress].add(rBurnFee);

emit Transfer(sender, burnAddress, burnFee);
}


function swapAndLiquify(address from, address to) private {
// 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 Dex pair.
uint256 contractTokenBalance = balanceOf(address(this));

bool shouldSell = contractTokenBalance >= minTokenToSwap;

if (
shouldSell &&
from != dexPair &&
swapAndLiquifyEnabled &&
!(from == address(this) && to == address(dexPair)) // swap 1 time
) {
// approve contract
_approve(address(this), address(dexRouter), contractTokenBalance);

uint256 halfLiquid = _accumulatedLiquidity.div(2);
uint256 otherHalfLiquid = _accumulatedLiquidity.sub(halfLiquid);

uint256 tokenAmountToBeSwapped = contractTokenBalance.sub(
otherHalfLiquid
);

// now is to lock into liquidty pool
Utils.swapTokensForEth(address(dexRouter), tokenAmountToBeSwapped);

uint256 deltaBalance = address(this).balance;
uint256 bnbToBeAddedToLiquidity = deltaBalance.mul(halfLiquid).div(tokenAmountToBeSwapped);
uint256 bnbFormarketWallet = deltaBalance.sub(bnbToBeAddedToLiquidity);

// sending bnb to award pool wallet
if(bnbFormarketWallet > 0)
marketWallet.transfer(bnbFormarketWallet);

// add liquidity to Dex
if(bnbToBeAddedToLiquidity > 0){
Utils.addLiquidity(
address(dexRouter),
owner(),
otherHalfLiquid,
bnbToBeAddedToLiquidity
);

emit SwapAndLiquify(
halfLiquid,
bnbToBeAddedToLiquidity,
otherHalfLiquid
);
}

// Reset current accumulated amount
_accumulatedLiquidity = 0;
_accumulatedMarketWallet = 0;
}
}
}

// Library for doing a swap on Dex
library Utils {
using SafeMath for uint256;

function swapTokensForEth(address routerAddress, uint256 tokenAmount)
internal
{
IDexRouter dexRouter = IDexRouter(routerAddress);

// generate the Dex pair path of token -> weth
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = dexRouter.WETH();

// make the swap
dexRouter.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0, // accept any amount of BNB
path,
address(this),
block.timestamp 300
);
}

function addLiquidity(
address routerAddress,
address owner,
uint256 tokenAmount,
uint256 ethAmount
) internal {
IDexRouter dexRouter = IDexRouter(routerAddress);

// add the liquidity
dexRouter.addLiquidityETH{value: ethAmount}(
address(this),
tokenAmount,
0, // slippage is unavoidable
0, // slippage is unavoidable
owner,
block.timestamp 300
);
}
}