// SPDX-License-Identifier: unlicensed

pragma solidity ^0.8.6;

/**
*
*/

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 getOwner() external view returns (address);
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);
}

abstract contract Auth {
address internal owner;
mapping (address => bool) internal authorizations;

constructor(address _owner) {
owner = _owner;
authorizations[_owner] = true;
}

modifier onlyOwner() {
require(isOwner(msg.sender), "!OWNER"); _;
}

modifier authorized() {
require(isAuthorized(msg.sender), "!AUTHORIZED"); _;
}

function authorize(address adr) public onlyOwner {
authorizations[adr] = true;
}

function unauthorize(address adr) public onlyOwner {
authorizations[adr] = false;
}

function isOwner(address account) public view returns (bool) {
return account == owner;
}

function isAuthorized(address adr) public view returns (bool) {
return authorizations[adr];
}

function transferOwnership(address payable adr) public onlyOwner {
owner = adr;
authorizations[adr] = true;
emit OwnershipTransferred(adr);
}

event OwnershipTransferred(address owner);
}

/**
*
*/

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,
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 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;
}

/**
*
*/

interface IDividendDistributor {
function setDistributionCriteria(uint256 _minPeriod, uint256 _minDistribution) external;
function setShare(address shareholder, uint256 amount) external;
function deposit() external payable;
function process(uint256 gas) external;
}

contract DividendDistributor is IDividendDistributor {

address _token;

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

IBEP20 RWRD = IBEP20(0x1D2F0da169ceB9fC7B3144628dB156f3F6c60dBE);
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 = 45 * 60;
uint256 public minDistribution = 1 * (10 ** 8);

uint256 currentIndex;

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

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

constructor (address _router) {
router = _router != address(0)
? IDEXRouter(_router)
: IDEXRouter(0x10ED43C718714eb63d5aA57B78B54704E256024E);
_token = msg.sender;
}

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

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

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

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

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

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

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

uint256 amount = RWRD.balanceOf(address(this)) - (balanceBefore);

totalDividends = totalDividends (amount);
dividendsPerShare = dividendsPerShare (dividendsPerShareAccuracyFactor * (amount) / (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 (gasLeft - (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 amount;
RWRD.transfer(shareholder, amount);
shareholderClaims[shareholder] = block.timestamp;
shares[shareholder].totalRealised = shares[shareholder].totalRealised (amount);
shares[shareholder].totalExcluded = getCumulativeDividends(shares[shareholder].amount);
}
}

function claimDividend() external {
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 - (shareholderTotalExcluded);
}

function getCumulativeDividends(uint256 share) internal view returns (uint256) {
return share * (dividendsPerShare) / (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 VRDoge is IBEP20, Auth {

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

string constant _name = "VR Doge";
string constant _symbol = "VRDoge";
uint8 constant _decimals = 9;
uint256 _totalSupply = 10 * 10**10 * 10**_decimals;

mapping (address => uint256) _balances;
mapping (address => uint256) public BuyCooldownTimer;
mapping (address => uint256) public SellCooldownTimer;
mapping (address => mapping (address => uint256)) _allowances;
mapping (address => bool) public isFeeExempt;
mapping (address => bool) public isTxLimitExempt;
mapping (address => bool) public isDividendExempt;
mapping (address => bool) public canAddLiquidityBeforeLaunch;

//
uint256 public liquidityFee;
uint256 public reflectionFee;
uint256 public marketingFee;
uint256 public DevFee;
uint256 public totalFee;

uint256 public BuyliquidityFee = 3;
uint256 public BuyreflectionFee = 0;
uint256 public BuymarketingFee = 5;
uint256 public BuyDevFee = 0;
uint256 public BuytotalFee = 8;

uint256 public SellliquidityFee = 3;
uint256 public SellreflectionFee = 0;
uint256 public SellmarketingFee = 9;
uint256 public SellDevFee = 0;
uint256 public SelltotalFee = 12;

uint256 public launchedAt = 0;

//
uint256 public _maxBuyTxAmount = _totalSupply / (100) * (2); // 2%
uint256 public _maxSellTxAmount = _totalSupply / (100) * (2); // 2%
uint256 public _maxWalletToken = _totalSupply / (100) * (2); // 2%

//
address public autoLiquidityReceiver;
address public marketingFeeReceiver;
address public DevFeeReceiver;

IDEXRouter public router;
address public pair;

bool public tradingOpen = false;
bool public autoLimits = true;

DividendDistributor public distributor;
uint256 distributorGas = 500000;

bool public swapEnabled = true;
uint256 public swapThreshold = _totalSupply / 1000 * 1; // 0.1%
uint256 public maxSwapSize = _totalSupply / 100 * 1; //1%
uint256 public tokensToSell;

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

constructor () Auth(msg.sender) {
router = IDEXRouter(0x10ED43C718714eb63d5aA57B78B54704E256024E);
pair = IDEXFactory(router.factory()).createPair(WBNB, address(this));
_allowances[address(this)][address(router)] = type(uint256).max;

distributor = new DividendDistributor(address(router));

isFeeExempt[msg.sender] = true;
isTxLimitExempt[msg.sender] = true;

canAddLiquidityBeforeLaunch[msg.sender] = true;

isDividendExempt[pair] = true;
isDividendExempt[address(this)] = true;
isDividendExempt[DEAD] = true;

autoLiquidityReceiver = 0x88ae4dBa8bCCf6145937F18ed9783811bBfCfEe9 ;
marketingFeeReceiver = 0xdC3D37538f1e6961C1Ee30a241C47aDC044a4cd0 ;
DevFeeReceiver = 0x030ffeeb3958A78600AbfCc504F723173e9aA918 ;

_balances[msg.sender] = _totalSupply;
emit Transfer(address(0), msg.sender, _totalSupply);
}

receive() external payable { }

function totalSupply() external view override returns (uint256) { return _totalSupply; }
function decimals() external pure override returns (uint8) { return _decimals; }
function symbol() external pure override returns (string memory) { return _symbol; }
function name() external pure override returns (string memory) { return _name; }
function getOwner() external view override returns (address) { return owner; }
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]; }
function approve(address spender, uint256 amount) public override returns (bool) {
_allowances[msg.sender][spender] = amount;
emit Approval(msg.sender, spender, amount);
return true;
}

function approveMax(address spender) external returns (bool) {
return approve(spender, type(uint256).max);
}

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] != type(uint256).max){
_allowances[sender][msg.sender] = _allowances[sender][msg.sender] - amount;
}

return _transferFrom(sender, recipient, amount);
}

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

//
if(!tradingOpen && recipient == pair && sender == pair){
require(canAddLiquidityBeforeLaunch[sender]);
}

if(!authorizations[sender] && !authorizations[recipient]){
require(tradingOpen,"Trading not open yet");
}

if(sender == pair){
buyFees();
}

if(recipient == pair){
sellFees();
}

if (!authorizations[sender] && recipient != address(this) && recipient != address(DEAD) && recipient != pair && recipient != marketingFeeReceiver && recipient != DevFeeReceiver && recipient != autoLiquidityReceiver){
uint256 heldTokens = balanceOf(recipient);
require((heldTokens amount) <= _maxWalletToken,"Total Holding is currently limited, you can not buy that much.");}

//

if(sender == pair){
require(amount <= _maxBuyTxAmount || isTxLimitExempt[recipient], "TX Limit Exceeded");
}

if(recipient == pair){
require(amount <= _maxSellTxAmount || isTxLimitExempt[sender], "TX Limit Exceeded");
}
//
if(shouldSwapBack()){ swapBack(); }

_balances[sender] = _balances[sender] - amount;

uint256 amountReceived = shouldTakeFee(sender) ? takeFee(recipient, amount) : amount;
_balances[recipient] = _balances[recipient] amountReceived;

//
if(!isDividendExempt[sender]) {
try distributor.setShare(sender, balanceOf(sender)) {} catch {}
}

if(!isDividendExempt[recipient]) {
try distributor.setShare(recipient, balanceOf(recipient)) {} catch {}
}

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

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

function _basicTransfer(address sender, address recipient, uint256 amount) internal returns (bool) {
_balances[sender] = _balances[sender] - amount;
_balances[recipient] = _balances[recipient] (amount);
emit Transfer(sender, recipient, amount);
return true;
}

function buyFees() internal{
liquidityFee = BuyliquidityFee;
reflectionFee = BuyreflectionFee;
marketingFee = BuymarketingFee;
DevFee = BuyDevFee;
totalFee = BuytotalFee;
}

function sellFees() internal{
liquidityFee = SellliquidityFee;
reflectionFee = SellreflectionFee;
marketingFee = SellmarketingFee;
DevFee = SellDevFee;
totalFee = SelltotalFee;
}

function shouldTakeFee(address sender) internal view returns (bool) {
return !isFeeExempt[sender];
}

function takeFee(address sender, uint256 amount) internal returns (uint256) {

uint256 feeAmount = amount / 100 * (totalFee);

_balances[address(this)] = _balances[address(this)] (feeAmount);
emit Transfer(sender, address(this), feeAmount);

return amount - (feeAmount);
}

function shouldSwapBack() internal view returns (bool) {
return msg.sender != pair
&& !inSwap
&& swapEnabled
&& _balances[address(this)] >= swapThreshold;
}

function swapBack() internal swapping {
uint256 contractTokenBalance = balanceOf(address(this));
if(contractTokenBalance >= maxSwapSize){
tokensToSell = maxSwapSize;
}
else{
tokensToSell = contractTokenBalance;
}

uint256 amountToLiquify = tokensToSell / (totalFee) * (liquidityFee) / (2);
uint256 amountToSwap = tokensToSell - (amountToLiquify);

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

uint256 balanceBefore = address(this).balance;

router.swapExactTokensForETHSupportingFeeOnTransferTokens(
amountToSwap,
0,
path,
address(this),
block.timestamp
);

uint256 amountBNB = address(this).balance - (balanceBefore);

uint256 totalBNBFee = totalFee - (liquidityFee / (2));

uint256 amountBNBLiquidity = amountBNB * (liquidityFee) / (totalBNBFee) / (2);
uint256 amountBNBReflection = amountBNB * (reflectionFee) / (totalBNBFee);
uint256 amountBNBMarketing = amountBNB * (marketingFee) / (totalBNBFee);
uint256 amountBNBDev = amountBNB - amountBNBLiquidity - amountBNBReflection - amountBNBMarketing;

try distributor.deposit{value: amountBNBReflection}() {} catch {}
(bool MarketingSuccess,) = payable(marketingFeeReceiver).call{value: amountBNBMarketing, gas: 30000}("");
require(MarketingSuccess, "receiver rejected ETH transfer");
(bool DevSuccess,) = payable(DevFeeReceiver).call{value: amountBNBDev, gas: 30000}("");
require(DevSuccess, "receiver rejected ETH transfer");

if(amountToLiquify > 0){
router.addLiquidityETH{value: amountBNBLiquidity}(
address(this),
amountToLiquify,
0,
0,
autoLiquidityReceiver,
block.timestamp
);
emit AutoLiquify(amountBNBLiquidity, amountToLiquify);
}
}

// External Functions
function checkSwapThreshold() external view returns (uint256) {
return swapThreshold;
}

function checkMaxWalletToken() external view returns (uint256) {
return _maxWalletToken;
}

function checkMaxBuyTxAmount() external view returns (uint256) {
return _maxBuyTxAmount;
}

function checkMaxSellTxAmount() external view returns (uint256) {
return _maxSellTxAmount;
}

function isNotInSwap() external view returns (bool) {
return !inSwap;
}

// Only Authorized allowed
function tradingStatus(bool _status) public authorized {
tradingOpen = _status;
if(tradingOpen && launchedAt == 0){
launchedAt = block.number;
}
}

function setBuyFees(uint256 _liquidityFee, uint256 _reflectionFee, uint256 _marketingFee, uint256 _DevFee) external authorized {
BuyliquidityFee = _liquidityFee;
BuyreflectionFee = _reflectionFee;
BuymarketingFee = _marketingFee;
BuyDevFee = _DevFee;
BuytotalFee = _liquidityFee (_reflectionFee) (_marketingFee) (_DevFee);
}

function setSellFees(uint256 _liquidityFee, uint256 _reflectionFee, uint256 _marketingFee, uint256 _DevFee) external authorized {
SellliquidityFee = _liquidityFee;
SellreflectionFee = _reflectionFee;
SellmarketingFee = _marketingFee;
SellDevFee = _DevFee;
SelltotalFee = _liquidityFee (_reflectionFee) (_marketingFee) (_DevFee);
}

function setFeeReceivers(address _autoLiquidityReceiver, address _marketingFeeReceiver, address _DevFeeReceiver ) external authorized {
autoLiquidityReceiver = _autoLiquidityReceiver;
marketingFeeReceiver = _marketingFeeReceiver;
DevFeeReceiver = _DevFeeReceiver;
}

function setSwapBackSettings(bool _enabled, uint256 _percentage_min_base10000, uint256 _percentage_max_base10000) external authorized {
swapEnabled = _enabled;
swapThreshold = _totalSupply / (10000) * (_percentage_min_base10000);
maxSwapSize = _totalSupply / (10000) * (_percentage_max_base10000);
}

function setCanTransferBeforeLaunch(address holder, bool exempt) external authorized {
canAddLiquidityBeforeLaunch[holder] = exempt; //Presale Address will be added as Exempt
isTxLimitExempt[holder] = exempt;
isFeeExempt[holder] = exempt;
}

function setIsDividendExempt(address holder, bool exempt) external authorized {
require(holder != address(this) && holder != pair);
isDividendExempt[holder] = exempt;
if(exempt){
distributor.setShare(holder, 0);
}else{
distributor.setShare(holder, balanceOf(holder));
}
}

function setIsFeeExempt(address holder, bool exempt) external authorized {
isFeeExempt[holder] = exempt;
}

function setIsTxLimitExempt(address holder, bool exempt) external authorized {
isTxLimitExempt[holder] = exempt;
}

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

function setDistributorSettings(uint256 gas) external authorized {
require(gas < 900000);
distributorGas = gas;
}

function setMaxWalletPercent_base1000(uint256 maxWallPercent_base1000) external onlyOwner() {
autoLimits = false;
_maxWalletToken = _totalSupply / (1000) * (maxWallPercent_base1000);
}

function setMaxBuyTxPercent_base1000(uint256 maxBuyTXPercentage_base1000) external onlyOwner() {
autoLimits = false;
_maxBuyTxAmount = _totalSupply / (1000) * (maxBuyTXPercentage_base1000);
}

function setMaxSellTxPercent_base1000(uint256 maxSellTXPercentage_base1000) external onlyOwner() {
autoLimits = false;
_maxSellTxAmount = _totalSupply / (1000) * (maxSellTXPercentage_base1000);
}

// Stuck Balances Functions
function rescueToken(address tokenAddress, uint256 tokens) public onlyOwner returns (bool success) {
return IBEP20(tokenAddress).transfer(msg.sender, tokens);
}

function clearStuckBalance(uint256 amountPercentage) external authorized {
uint256 amountBNB = address(this).balance;
payable(marketingFeeReceiver).transfer(amountBNB * amountPercentage / 100);
}

event AutoLiquify(uint256 amountBNB, uint256 amountTokens);

}