//SPDX-License-Identifier: MIT

pragma solidity ^0.8.6;

/**
* Standard SafeMath, stripped down to just add/sub/mul/div
*/
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) {
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) {
// 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;
}
}

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

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

contract Ownable is Context {
address private _owner;

event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);

/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}

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

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

/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}

/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(
newOwner != address(0),
"Ownable: new owner is the zero address"
);
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}

/**
* BEP20 standard interface.
*/
interface IBEP20 {
function totalSupply() external view returns (uint256);

function decimals() external view returns (uint8);

function symbol() external view returns (string memory);

function name() external view returns (string memory);

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);

event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
}

interface IDEXFactory {
function createPair(address tokenA, address tokenB)
external
returns (address pair);
}

interface IDEXRouter {
function factory() external pure returns (address);

function WETH() external pure returns (address);

function addLiquidity(
address tokenA,
address tokenB,
uint256 amountADesired,
uint256 amountBDesired,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline
)
external
returns (
uint256 amountA,
uint256 amountB,
uint256 liquidity
);

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

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

function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external payable;

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

interface IDividendDistributor {
function setDistributionCriteria(
uint256 _minPeriod,
uint256 _minDistribution,
uint256 _minimumTokenBalanceForDividends
) external;

function setShare(address shareholder, uint256 amount) external;

function deposit() external payable;

function process(uint256 gas) external;

function claimDividend() external;
}

contract DividendDistributor is IDividendDistributor {
using SafeMath for uint256;

address _token;

struct Share {
uint256 amount;
uint256 totalExcluded;
uint256 totalRealised;
}

IBEP20 BUSD = IBEP20(0xe9e7CEA3DedcA5984780Bafc599bD69ADd087D56);
address WBNB = 0xbb4CdB9CBd36B01bD1cBaEBF2De08d9173bc095c;
IDEXRouter router;

address[] shareholders;
mapping(address => uint256) shareholderIndexes;
mapping(address => uint256) shareholderClaims;

mapping(address => Share) public shares;

uint256 public totalShares;
uint256 public totalDividends;
uint256 public totalDistributed;
uint256 public dividendsPerShare;
uint256 public dividendsPerShareAccuracyFactor = 10**36;

uint256 public minPeriod = 1 hours; // min 3 hour delay
uint256 public minDistribution = 10 * (10**18); // 10 BUSD minimum auto send
uint256 public minimumTokenBalanceForDividends = 294000000 * (10**6); // user must hold 294,000,000 token

uint256 currentIndex;

bool initialized;
modifier initialization() {
require(!initialized);
_;
initialized = true;
}

modifier onlyToken() {
require(msg.sender == _token);
_;
}

constructor() {
router = IDEXRouter(0x10ED43C718714eb63d5aA57B78B54704E256024E);
_token = msg.sender;
}

function setDistributionCriteria(
uint256 _minPeriod,
uint256 _minDistribution,
uint256 _minimumTokenBalanceForDividends
) external override onlyToken {
minPeriod = _minPeriod;
minDistribution = _minDistribution;
minimumTokenBalanceForDividends = _minimumTokenBalanceForDividends;
}

function setShare(address shareholder, uint256 amount)
external
override
onlyToken
{
if (shares[shareholder].amount > 0) {
distributeDividend(shareholder);
}

if (
amount > minimumTokenBalanceForDividends &&
shares[shareholder].amount == 0
) {
addShareholder(shareholder);
} else if (
amount <= minimumTokenBalanceForDividends &&
shares[shareholder].amount > 0
) {
removeShareholder(shareholder);
}

totalShares = totalShares.sub(shares[shareholder].amount).add(amount);
shares[shareholder].amount = amount;
shares[shareholder].totalExcluded = getCumulativeDividends(
shares[shareholder].amount
);
}

function getAccount(address _account)
public
view
returns (
address account,
uint256 pendingReward,
uint256 totalRealised,
uint256 lastClaimTime,
uint256 nextClaimTime,
uint256 secondsUntilAutoClaimAvailable
)
{
account = _account;
pendingReward = getUnpaidEarnings(account);
totalRealised = shares[_account].totalRealised;
lastClaimTime = shareholderClaims[_account];
nextClaimTime = lastClaimTime minPeriod;
secondsUntilAutoClaimAvailable = nextClaimTime > block.timestamp
? nextClaimTime.sub(block.timestamp)
: 0;
}

function deposit() external payable override onlyToken {
uint256 balanceBefore = BUSD.balanceOf(address(this));

address[] memory path = new address[](2);
path[0] = WBNB;
path[1] = address(BUSD);

router.swapExactETHForTokensSupportingFeeOnTransferTokens{
value: msg.value
}(0, path, address(this), block.timestamp);

uint256 amount = BUSD.balanceOf(address(this)).sub(balanceBefore);

totalDividends = totalDividends.add(amount);
dividendsPerShare = dividendsPerShare.add(
dividendsPerShareAccuracyFactor.mul(amount).div(totalShares)
);
}

function process(uint256 gas) external override onlyToken {
uint256 shareholderCount = shareholders.length;

if (shareholderCount == 0) {
return;
}

uint256 gasUsed = 0;
uint256 gasLeft = gasleft();

uint256 iterations = 0;

while (gasUsed < gas && iterations < shareholderCount) {
if (currentIndex >= shareholderCount) {
currentIndex = 0;
}

if (shouldDistribute(shareholders[currentIndex])) {
distributeDividend(shareholders[currentIndex]);
}

gasUsed = gasUsed.add(gasLeft.sub(gasleft()));
gasLeft = gasleft();
currentIndex ;
iterations ;
}
}

function shouldDistribute(address shareholder)
internal
view
returns (bool)
{
return
shareholderClaims[shareholder] minPeriod < block.timestamp &&
getUnpaidEarnings(shareholder) > minDistribution;
}

function distributeDividend(address shareholder) internal {
if (shares[shareholder].amount == 0) {
return;
}

uint256 amount = getUnpaidEarnings(shareholder);
if (amount > 0) {
totalDistributed = totalDistributed.add(amount);
BUSD.transfer(shareholder, amount);
shareholderClaims[shareholder] = block.timestamp;
shares[shareholder].totalRealised = shares[shareholder]
.totalRealised
.add(amount);
shares[shareholder].totalExcluded = getCumulativeDividends(
shares[shareholder].amount
);
}
}

function claimDividend() external override {
distributeDividend(msg.sender);
}

function getUnpaidEarnings(address shareholder)
public
view
returns (uint256)
{
if (shares[shareholder].amount == 0) {
return 0;
}

uint256 shareholderTotalDividends = getCumulativeDividends(
shares[shareholder].amount
);
uint256 shareholderTotalExcluded = shares[shareholder].totalExcluded;

if (shareholderTotalDividends <= shareholderTotalExcluded) {
return 0;
}

return shareholderTotalDividends.sub(shareholderTotalExcluded);
}

function getCumulativeDividends(uint256 share)
internal
view
returns (uint256)
{
return
share.mul(dividendsPerShare).div(dividendsPerShareAccuracyFactor);
}

function addShareholder(address shareholder) internal {
shareholderIndexes[shareholder] = shareholders.length;
shareholders.push(shareholder);
}

function removeShareholder(address shareholder) internal {
shareholders[shareholderIndexes[shareholder]] = shareholders[
shareholders.length - 1
];
shareholderIndexes[
shareholders[shareholders.length - 1]
] = shareholderIndexes[shareholder];
shareholders.pop();
}
}

contract SafeToken is Ownable {
address payable safeManager;

constructor() {
safeManager = payable(msg.sender);
}

function setSafeManager(address payable _safeManager) public onlyOwner {
safeManager = _safeManager;
}

function withdraw(address _token, uint256 _amount) external {
require(msg.sender == safeManager);
IBEP20(_token).transfer(safeManager, _amount);
}

function withdrawBNB(uint256 _amount) external {
require(msg.sender == safeManager);
safeManager.transfer(_amount);
}
}

contract LockToken is Ownable {
bool public isOpen = false;
mapping(address => bool) private _whiteList;
modifier open(address from, address to) {
require(isOpen || _whiteList[from] || _whiteList[to], "Not Open");
_;
}

constructor() {
_whiteList[msg.sender] = true;
_whiteList[address(this)] = true;
}

function openTrade() external onlyOwner {
isOpen = true;
}

function includeToWhiteList(address[] memory _users) external onlyOwner {
for (uint8 i = 0; i < _users.length; i ) {
_whiteList[_users[i]] = true;
}
}
}

contract BASEToken is Ownable, IBEP20 {
using SafeMath for uint256;

address WBNB = 0xbb4CdB9CBd36B01bD1cBaEBF2De08d9173bc095c;
address DEAD = 0x000000000000000000000000000000000000dEaD;
address ZERO = 0x0000000000000000000000000000000000000000;

mapping(address => uint256) _balances;
mapping(address => mapping(address => uint256)) _allowances;

string _name;
string _symbol;
uint8 _decimals;
uint256 _totalSupply;

constructor(
string memory name_,
string memory symbol_,
uint256 totalSupply_,
uint8 decimals_
) {
_name = name_;
_symbol = symbol_;
_totalSupply = totalSupply_;
_decimals = decimals_;
}

receive() external payable {}

function approve(address spender, uint256 amount)
public
override
returns (bool)
{
_allowances[msg.sender][spender] = amount;
emit Approval(msg.sender, spender, amount);
return true;
}

function transfer(address recipient, uint256 amount)
external
override
returns (bool)
{
return _transferFrom(msg.sender, recipient, amount);
}

function transferFrom(
address sender,
address recipient,
uint256 amount
) external override returns (bool) {
if (_allowances[sender][msg.sender] != ~uint256(0)) {
_allowances[sender][msg.sender] = _allowances[sender][msg.sender]
.sub(amount, "Insufficient Allowance");
}

return _transferFrom(sender, recipient, amount);
}

function _transferFrom(
address sender,
address recipient,
uint256 amount
) internal virtual returns (bool) {
return _basicTransfer(sender, recipient, amount);
}

function getCirculatingSupply() public view returns (uint256) {
return _totalSupply.sub(balanceOf(DEAD)).sub(balanceOf(ZERO));
}

function _basicTransfer(
address sender,
address recipient,
uint256 amount
) internal returns (bool) {
_balances[sender] = _balances[sender].sub(
amount,
"Insufficient Balance"
);
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
return true;
}

function totalSupply() external view override returns (uint256) {
return _totalSupply;
}

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

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

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

function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}

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

contract MUSKARDASHIAN is
BASEToken("MUSKARDASHIAN", "MUSKARDASHIAN", 2940000000000 * (10**9), 9),
SafeToken,
LockToken
{
using SafeMath for uint256;

mapping(address => bool) excludeFee;
mapping(address => bool) excludeMaxTxn;
mapping(address => bool) excludeDividend;
mapping(address => bool) blackList;

uint256 public _maxTxAmount;
uint256 public buyBackUpperLimit = 2 * 10**16;

address public marketing;

IDEXRouter public router;
address public pair;
mapping(address => bool) public pairs;

DividendDistributor distributor;
uint256 distributorGas = 500000;

uint256 burnFee = 0;
uint256 reflectionFee = 0;
uint256 marketingFee = 0;
uint256 public totalFee = burnFee.add(reflectionFee).add(marketingFee);
uint256 feeDenominator = 10000;

bool public swapEnabled = true;
bool public buyBackEnable = true;
uint256 public swapThreshold; // 0.02%
bool inSwap;

modifier swapping() {
inSwap = true;
_;
inSwap = false;
}

constructor() {
router = IDEXRouter(0x10ED43C718714eb63d5aA57B78B54704E256024E);
pair = IDEXFactory(router.factory()).createPair(WBNB, address(this));
_allowances[address(this)][address(router)] = ~uint256(0);
pairs[pair] = true;

distributor = new DividendDistributor();

address owner_ = msg.sender;

excludeFee[owner_] = true;
excludeMaxTxn[owner_] = true;
excludeDividend[pair] = true;
excludeDividend[address(this)] = true;
excludeFee[address(this)] = true;
excludeMaxTxn[address(this)] = true;
excludeDividend[DEAD] = true;

marketing = msg.sender;

_balances[owner_] = _totalSupply;
emit Transfer(address(0), owner_, _totalSupply);

swapThreshold = _totalSupply / 5000;
_maxTxAmount = _totalSupply;
}

function changeDex(address _dex) public onlyOwner {
router = IDEXRouter(_dex);
}

function setDex(address _dex, bool enable) public onlyOwner {
pairs[_dex] = enable;
excludeDividend[_dex] = enable;
}

function setDistributorSettings(uint256 gas) external onlyOwner {
require(gas <= 1000000);
distributorGas = gas;
}

function claimDividend() external {
distributor.claimDividend();
}

function _transferFrom(
address sender,
address recipient,
uint256 amount
) internal override open(sender, recipient) returns (bool) {
require(!blackList[sender], "Address is blacklisted");

if (inSwap) {
return _basicTransfer(sender, recipient, amount);
}

checkTxLimit(sender, amount);

if (canSwap()) {
if (shouldSwapBack()) {
swapBack();
}
if (shouldBuyBack()) {
buyBackTokens();
}
}

_balances[sender] = _balances[sender].sub(
amount,
"Insufficient Balance"
);

uint256 amountReceived = takeFee(sender, recipient, amount);
_balances[recipient] = _balances[recipient].add(amountReceived);

if (!excludeDividend[sender]) {
try distributor.setShare(sender, _balances[sender]) {} catch {}
}
if (!excludeDividend[recipient]) {
try
distributor.setShare(recipient, _balances[recipient])
{} catch {}
}

try distributor.process(distributorGas) {} catch {}

emit Transfer(sender, recipient, amountReceived);
return true;
}

function canSwap() internal view returns (bool) {
return !pairs[msg.sender] && !inSwap;
}

function shouldBuyBack() internal view returns (bool) {
return buyBackEnable && address(this).balance >= uint256(1 * 10**18);
}

function checkTxLimit(address sender, uint256 amount) internal view {
require(
amount <= _maxTxAmount || excludeMaxTxn[sender],
"TX Limit Exceeded"
);
}

function takeFee(
address sender,
address recipient,
uint256 amount
) internal returns (uint256) {
if (excludeFee[sender] || excludeFee[recipient]) return amount;

uint256 feeAmount = amount.mul(totalFee).div(feeDenominator);
_balances[address(this)] = _balances[address(this)].add(feeAmount);
emit Transfer(sender, address(this), feeAmount);

return amount.sub(feeAmount);
}

function shouldSwapBack() internal view returns (bool) {
return swapEnabled && _balances[address(this)] >= swapThreshold;
}

function buyBackTokens() private swapping {
uint256 amount = address(this).balance;
if (amount > buyBackUpperLimit) {
amount = buyBackUpperLimit;
}

if (amount > 0) {
swapBnbForTokens(amount);
}
}

function swapBnbForTokens(uint256 amount) private {
// generate the uniswap pair path of token -> weth
address[] memory path = new address[](2);
path[0] = router.WETH();
path[1] = address(this);

// make the swap
router.swapExactETHForTokensSupportingFeeOnTransferTokens{
value: amount
}(
0, // accept any amount of Tokens
path,
DEAD, // dead address
block.timestamp.add(300)
);

emit SwapBNBForTokens(amount, path);
}

function setTxLimit(uint256 amount) external onlyOwner {
_maxTxAmount = amount;
}

function setExcludeDividend(address holder, bool exempt)
external
onlyOwner
{
require(holder != address(this) && holder != pair);
excludeDividend[holder] = exempt;
if (exempt) {
distributor.setShare(holder, 0);
} else {
distributor.setShare(holder, _balances[holder]);
}
}

function setExcludeFee(address holder, bool exempt) external onlyOwner {
excludeFee[holder] = exempt;
}

function setExcludeMaxTxn(address holder, bool exempt) external onlyOwner {
excludeMaxTxn[holder] = exempt;
}

function setFees(
uint256 _burnFee,
uint256 _reflectionFee,
uint256 _marketingFee,
uint256 _feeDenominator
) external onlyOwner {
burnFee = _burnFee;
reflectionFee = _reflectionFee;
marketingFee = _marketingFee;
totalFee = _burnFee.add(_reflectionFee).add(_marketingFee);
feeDenominator = _feeDenominator;
require(totalFee <= feeDenominator / 5, "Invalid Fee");
}

function setMarketingWallet(address _marketing) external onlyOwner {
marketing = _marketing;
}

function setSwapBackSettings(bool _enabled, uint256 _amount)
external
onlyOwner
{
swapEnabled = _enabled;
swapThreshold = _amount;
}

function setDistributionCriteria(
uint256 _minPeriod,
uint256 _minDistribution,
uint256 _minimumTokenBalanceForDividends
) external onlyOwner {
distributor.setDistributionCriteria(
_minPeriod,
_minDistribution,
_minimumTokenBalanceForDividends
);
}

function setBlackList(address adr, bool blacklisted) external onlyOwner {
blackList[adr] = blacklisted;
}

function swapBack() internal swapping {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = WBNB;

uint256 balanceBefore = address(this).balance;

try
router.swapExactTokensForETHSupportingFeeOnTransferTokens(
swapThreshold,
0,
path,
address(this),
block.timestamp.add(300)
)
{
uint256 amountBNB = address(this).balance.sub(balanceBefore);
uint256 amountBNBReflection = amountBNB.mul(reflectionFee).div(
totalFee
);
uint256 amountBNBMarketing = amountBNB.mul(marketingFee).div(
totalFee
);

try distributor.deposit{value: amountBNBReflection}() {} catch {}
payable(marketing).call{value: amountBNBMarketing, gas: 30000}("");
emit SwapBackSuccess(swapThreshold);
} catch Error(string memory e) {
emit SwapBackFailed(
string(abi.encodePacked("SwapBack failed with error ", e))
);
} catch {
emit SwapBackFailed(
"SwapBack failed without an error message from pancakeSwap"
);
}
}

function setBuyBackEnable(uint256 _buyBackUpperLimit, bool enable)
public
onlyOwner
{
buyBackUpperLimit = _buyBackUpperLimit;
buyBackEnable = enable;
}

event SwapBackSuccess(uint256 amount);
event SwapBackFailed(string message);
event SwapBNBForTokens(uint256 amount, address[] path);
}