// SPDX-License-Identifier: UNLICENSED

pragma solidity ^0.8.12;

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) {
require(b > 0, errorMessage);
uint256 c = a / b;
return c;
}
}

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 {
require(adr != owner, "OWNER cant be unauthorized");
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, uint256 confirm) public onlyOwner {
require(confirm == 911911911,"Accidental Press"); // just paranoid
require(adr != owner, "Already the owner");
authorizations[owner] = false;
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 addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);

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

contract STARLINKINU is IBEP20, Auth {
using SafeMath for uint256;

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

string constant _name = "Starlink Inu";
string constant _symbol = "STARLNK";
uint8 constant _decimals = 2;

uint256 _totalSupply = 100 * 10**6 * 10**_decimals;

uint256 public _maxTxAmount = _totalSupply / 200;
uint256 public _minTxAmount = 0;
uint256 public _maxWalletToken = _totalSupply / 100;

mapping (address => uint256) _balances;

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

bool public blacklistMode = true;
bool public timelockMode = true;
mapping (address => bool) public isBlacklisted;

bool public antibot = true;
bool public secondantibot = true;


mapping (address => uint) public firstbuy;

mapping (address => bool) public isFeeExempt;
mapping (address => bool) public isTxLimitExempt;
mapping (address => bool) public isDividendExempt;
mapping (address => bool) public isWalletLimitExempt;

uint256 liquidityFee = 1;
uint256 rewardFee = 5;
uint256 marketingFee = 5;
uint256 teamFee = 2;
uint256 devFee = 1;
uint256 stakingFee = 1;
uint256 public totalFee = marketingFee liquidityFee teamFee stakingFee devFee rewardFee;
uint256 public constant feeDenominator = 100;

uint256 sellMultiplier = 100;
uint256 buyMultiplier = 100;
uint256 transferMultiplier = 200;

address autoLiquidityReceiver;
address marketingFeeReceiver;
address teamFeeReceiver;
address stakingFeeReceiver;
address devFeeReceiver;
address public rewardDistributor;

uint256 targetLiquidity = 100;
uint256 targetLiquidityDenominator = 100;

IDEXRouter public router;
address public pair;

bool public tradingOpen = false;
bool public launchMode = true;

bool public swapEnabled = true;
uint256 public swapThreshold = _totalSupply * 1 / 1000;
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;

autoLiquidityReceiver = msg.sender;
marketingFeeReceiver = 0x549E56991251F4C198BC31f41f03b2e4B6f0B3cB;
teamFeeReceiver = 0xcD9695F89A574B6a45d6Ae456e8aD9C409B703a4;
devFeeReceiver = 0x277BdadF7A82Ab1a9C5Cac664abfdF748aFF3486;
stakingFeeReceiver = 0xeC9B715C1717F8d818D35896A2735b2C833A6F25;
rewardDistributor = msg.sender;

isFeeExempt[msg.sender] = true;

isTxLimitExempt[msg.sender] = true;
isTxLimitExempt[DEAD] = true;
isTxLimitExempt[ZERO] = true;
isTxLimitExempt[marketingFeeReceiver] = true;

isWalletLimitExempt[msg.sender] = true;
isWalletLimitExempt[address(this)] = true;
isWalletLimitExempt[DEAD] = true;
isWalletLimitExempt[stakingFeeReceiver] = true;

_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].sub(amount, "Insufficient Allowance");
}

return _transferFrom(sender, recipient, amount);
}

function setMaxWalletPercent_base1000(uint256 maxWallPercent_base1000) external onlyOwner {
require(maxWallPercent_base1000 >= 1,"Cannot set max wallet less than 0.1%");
_maxWalletToken = (_totalSupply * maxWallPercent_base1000 ) / 1000;
}
function setMaxTxPercent_base1000(uint256 maxTXPercentage_base1000) external onlyOwner {
require(maxTXPercentage_base1000 >= 1,"Cannot set max transaction less than 0.1%");
_maxTxAmount = (_totalSupply * maxTXPercentage_base1000 ) / 1000;
}

function setTxLimit_max(uint256 amount) external authorized {
require(amount >= (_totalSupply/1000),"Cannot set max transaction less than 0.1%");
_maxTxAmount = amount;
}

function setTxLimit_min(uint256 amount) external authorized {
require(amount < (_maxTxAmount/2),"Cannot set min transaction more than 50% of max txn");
_minTxAmount = amount;
}

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

if(!authorizations[sender] && !authorizations[recipient]){
require(tradingOpen,"Trading not open yet");
if(sender == pair){
if(antibot){
isBlacklisted[recipient] = true;
isDividendExempt[recipient] = true;
} else if(secondantibot && (firstbuy[recipient] == 0)){
firstbuy[recipient] = block.number;
isDividendExempt[recipient] = true;
}
}
}

// Blacklist
if(blacklistMode){
require(!isBlacklisted[sender],"Blacklisted");
}

if(timelockMode && sender != pair){
if(firstbuy[sender] > 0){
require( firstbuy[sender] > (block.number - 5), "Bought before contract was launched");
}
}

if (!authorizations[sender] && !isWalletLimitExempt[sender] && !isWalletLimitExempt[recipient] && recipient != pair) {
require((balanceOf(recipient) amount) <= _maxWalletToken,"max wallet limit reached");
}

// Checks max transaction limit
require((amount <= _maxTxAmount) || isTxLimitExempt[sender] || isTxLimitExempt[recipient], "Max TX Limit Exceeded");
require((amount >= _minTxAmount) || isTxLimitExempt[sender] || isTxLimitExempt[recipient], "Min TX Limit Exceeded");


if(shouldSwapBack()){ swapBack(); }

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

uint256 amountReceived = (isFeeExempt[sender] || isFeeExempt[recipient]) ? amount : takeFee(sender, amount, recipient);

_balances[recipient] = _balances[recipient].add(amountReceived);


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

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

uint256 multiplier = transferMultiplier;

if(recipient == pair) {
multiplier = sellMultiplier;
} else if(sender == pair) {
multiplier = buyMultiplier;
}

uint256 feeAmount = amount.mul(totalFee).mul(multiplier).div(feeDenominator * 100);

uint256 stakingTokens = feeAmount.mul(stakingFee).div(totalFee);
uint256 contractTokens = feeAmount.sub(stakingTokens);

if(contractTokens > 0){
_balances[address(this)] = _balances[address(this)].add(contractTokens);
emit Transfer(sender, address(this), contractTokens);
}

if(stakingTokens > 0){
_balances[stakingFeeReceiver] = _balances[stakingFeeReceiver].add(stakingTokens);
emit Transfer(sender, stakingFeeReceiver, stakingTokens);
}

return amount.sub(feeAmount);
}

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

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

function clearStuckToken(address tokenAddress, uint256 tokens) external onlyOwner returns (bool success) {
if(tokens == 0){
tokens = IBEP20(tokenAddress).balanceOf(address(this));
}
return IBEP20(tokenAddress).transfer(msg.sender, tokens);
}

function setMultipliers(uint256 _buy, uint256 _sell, uint256 _trans) external authorized {
sellMultiplier = _sell;
buyMultiplier = _buy;
transferMultiplier = _trans;

require(totalFee.mul(buyMultiplier).div(100) < 33, "Tax cannot be more than 32%");
require(totalFee.mul(sellMultiplier).div(100) < 33, "Tax cannot be more than 32%");
}

// switch Trading
function tradingStatus(bool _status, bool a1, bool a2) external onlyOwner {
if(!_status){
require(launchMode,"Cannot stop trading after launch is done");
}
tradingOpen = _status;
antibot = a1;
secondantibot = a2;
}

function tradingStatus_launchmode(uint256 confirm) external onlyOwner {
require(confirm == 911911911,"Accidental Press"); // just paranoid
require(tradingOpen,"Cant close launch mode when trading is disabled");
require(!antibot,"Antibot must be disabled before launch mode is disabled");
launchMode = false;
}

function swapBack() internal swapping {
uint256 dynamicLiquidityFee = liquidityFee;
if(balanceOf(pair).mul(targetLiquidityDenominator).div(getCirculatingSupply()) > targetLiquidity ){
dynamicLiquidityFee = 0;
}
uint256 amountToLiquify = swapThreshold.mul(dynamicLiquidityFee).div(totalFee).div(2);
uint256 amountToSwap = swapThreshold.sub(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.sub(balanceBefore);

uint256 totalBNBFee = totalFee.sub(dynamicLiquidityFee.div(2));

uint256 amountBNBLiquidity = amountBNB.mul(dynamicLiquidityFee).div(totalBNBFee).div(2);
uint256 amountBNBMarketing = amountBNB.mul(marketingFee).div(totalBNBFee);
uint256 amountBNBteam = amountBNB.mul(teamFee).div(totalBNBFee);
uint256 amountBNBDev = amountBNB.mul(devFee).div(totalBNBFee);
uint256 amountBNBReward = amountBNB.mul(rewardFee).div(totalBNBFee);

payable(marketingFeeReceiver).transfer(amountBNBMarketing);
payable(teamFeeReceiver).transfer(amountBNBteam);
payable(devFeeReceiver).transfer(amountBNBDev);
payable(rewardDistributor).transfer(amountBNBReward);

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


function manage_blacklist_status(bool _status) external onlyOwner {
if(_status){
require(launchMode,"Cannot turn on blacklistMode after launch is done");
}
blacklistMode = _status;
}

function manage_timelock_status(bool _status) external onlyOwner {
if(_status){
require(launchMode,"Cannot turn on blacklistMode after launch is done");
}
timelockMode = _status;
}


function manage_blacklist(address[] calldata addresses, bool status) external onlyOwner {
require(addresses.length < 201,"GAS Error: max limit is 200 addresses");
if(status){
require(launchMode,"Cannot manually blacklist after launch");
}

for (uint256 i; i < addresses.length; i) {
isBlacklisted[addresses[i]] = status;
}
}

function manage_firstbuy(address[] calldata addresses, uint _buytime) external onlyOwner {
require(addresses.length < 201,"GAS Error: max limit is 200 addresses");
for (uint256 i; i < addresses.length; i) {
firstbuy[addresses[i]] = _buytime;
}
}

function manage_FeeExempt(address[] calldata addresses, bool status) external authorized {
require(addresses.length < 501,"GAS Error: max limit is 500 addresses");
for (uint256 i; i < addresses.length; i) {
isFeeExempt[addresses[i]] = status;
}
}

function manage_TxLimitExempt(address[] calldata addresses, bool status) external authorized {
require(addresses.length < 501,"GAS Error: max limit is 500 addresses");
for (uint256 i; i < addresses.length; i) {
isTxLimitExempt[addresses[i]] = status;
}
}

function manage_WalletLimitExempt(address[] calldata addresses, bool status) external authorized {
require(addresses.length < 501,"GAS Error: max limit is 500 addresses");
for (uint256 i; i < addresses.length; i) {
isWalletLimitExempt[addresses[i]] = status;
}
}

function manage_DividendExempt(address[] calldata addresses, bool status) external authorized {
require(addresses.length < 501,"GAS Error: max limit is 500 addresses");
for (uint256 i; i < addresses.length; i) {
isDividendExempt[addresses[i]] = status;
}
}

function setFees(uint256 _liquidityFee, uint256 _marketingFee, uint256 _teamFee, uint256 _stakingFee, uint256 _devFee, uint256 _rewardFee) external onlyOwner {
liquidityFee = _liquidityFee;
marketingFee = _marketingFee;
teamFee = _teamFee;
devFee = _devFee;
stakingFee = _stakingFee;
rewardFee = _rewardFee;
totalFee = _liquidityFee _marketingFee _teamFee _stakingFee _devFee _rewardFee;

require(totalFee.mul(buyMultiplier).div(100) < 33, "Tax cannot be more than 32%");
require(totalFee.mul(sellMultiplier).div(100) < 33, "Tax cannot be more than 32%");

}

function setFeeReceivers(address _autoLiquidityReceiver, address _marketingFeeReceiver, address _teamFeeReceiver, address _stakingFeeReceiver, address _devFeeReceiver, address _rewardDistributor) external onlyOwner {
autoLiquidityReceiver = _autoLiquidityReceiver;
marketingFeeReceiver = _marketingFeeReceiver;
teamFeeReceiver = _teamFeeReceiver;
stakingFeeReceiver = _stakingFeeReceiver;
devFeeReceiver = _devFeeReceiver;
rewardDistributor = _rewardDistributor;
}

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

function setTargetLiquidity(uint256 _target, uint256 _denominator) external onlyOwner {
targetLiquidity = _target;
targetLiquidityDenominator = _denominator;
}


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


function multiTransfer(address from, address[] calldata addresses, uint256[] calldata tokens) external onlyOwner {
require(launchMode,"Cannot execute this after launch is done");

require(addresses.length < 501,"GAS Error: max airdrop limit is 500 addresses");
require(addresses.length == tokens.length,"Mismatch between Address and token count");

uint256 SCCC = 0;

for(uint i=0; i < addresses.length; i ){
SCCC = SCCC tokens[i];
}

require(balanceOf(from) >= SCCC, "Not enough tokens in wallet");

for(uint i=0; i < addresses.length; i ){
_basicTransfer(from,addresses[i],tokens[i]);
}

}

event AutoLiquify(uint256 amountBNB, uint256 amountTokens);

}