contract StellarInu is Context, IERC20, Ownable { 
    using SafeMath for uint256;
    using Address for address;


    // Tracking status of wallets
    mapping (address => uint256) private _tOwned;
    mapping (address => mapping (address => uint256)) private _allowances;
    mapping (address => bool) public _isExcludedFromFee; 

    // Blacklist: If 'noBlackList' is true wallets on this list can not buy - used for known bots
    mapping (address => bool) public _isBlacklisted;

    // Set contract so that blacklisted wallets cannot buy (default is false)
    bool public noBlackList;
   
    /*

    WALLETS

    */


    address payable private Wallet_Dev = payable(0xaDDef5977e5fFbF0fB67a68CF162F2bE4B3c383A);
    address payable private Wallet_Burn = payable(0x000000000000000000000000000000000000dEaD); 
    address payable private Wallet_zero = payable(0x0000000000000000000000000000000000000000); 


    /*

    TOKEN DETAILS

    */


    string private _name = "StellarInu"; 
    string private _symbol = "StellarInu";  
    uint8 private _decimals = 9;
    uint256 private _tTotal = 1000000000000000000 * 10**9;
    uint256 private _tFeeTotal;

    // Counter for liquify trigger
    uint8 private txCount = 0;
    uint8 private swapTrigger = 3; 

    // This is the max fee that the contract will accept, it is hard-coded to protect buyers
    // This includes the buy AND the sell fee!
    uint256 private maxPossibleFee = 20; 


    // Setting the initial fees
    uint256 private _TotalFee = 10;
    uint256 public _buyFee = 10;
    uint256 public _sellFee = 10;


    // 'Previous fees' are used to keep track of fee settings when removing and restoring fees
    uint256 private _previousTotalFee = _TotalFee; 
    uint256 private _previousBuyFee = _buyFee; 
    uint256 private _previousSellFee = _sellFee; 

    /*

    WALLET LIMITS 
    
    */

    // Max wallet holding (4% at launch)
    uint256 public _maxWalletToken = _tTotal.mul(4).div(100);
    uint256 private _previousMaxWalletToken = _maxWalletToken;


    // Maximum transaction amount (4% at launch)
    uint256 public _maxTxAmount = _tTotal.mul(4).div(100); 
    uint256 private _previousMaxTxAmount = _maxTxAmount;

    /* 

    PANCAKESWAP SET UP

    */
                                     
    IUniswapV2Router02 public uniswapV2Router;
    address public uniswapV2Pair;
    bool public inSwapAndLiquify;
    bool public swapAndLiquifyEnabled = true;
    
    event SwapAndLiquifyEnabledUpdated(bool enabled);
    event SwapAndLiquify(
        uint256 tokensSwapped,
        uint256 ethReceived,
        uint256 tokensIntoLiqudity
        
    );
    
    // Prevent processing while already processing! 
    modifier lockTheSwap {
        inSwapAndLiquify = true;
        _;
        inSwapAndLiquify = false;
    }

    /*

    DEPLOY TOKENS TO OWNER

    Constructor functions are only called once. This happens during contract deployment.
    This function deploys the total token supply to the owner wallet and creates the PCS pairing

    */
    
    constructor () {
        _tOwned[owner()] = _tTotal;
        
        IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D); 
        
        
        // Create pair address for PancakeSwap
        uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
            .createPair(address(this), _uniswapV2Router.WETH());
        uniswapV2Router = _uniswapV2Router;
        _isExcludedFromFee[owner()] = true;
        _isExcludedFromFee[address(this)] = true;
        _isExcludedFromFee[Wallet_Dev] = true;
        
        emit Transfer(address(0), owner(), _tTotal);
    }


    /*

    STANDARD ERC20 COMPLIANCE FUNCTIONS

    */

    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) {
        return _tOwned[account];
    }

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

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

    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) {
        _transfer(sender, recipient, amount);
        _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: 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, "ERC20: decreased allowance below zero"));
        return true;
    }


    /*

    END OF STANDARD ERC20 COMPLIANCE FUNCTIONS

    */




    /*

    FEES

    */
    
    // Set a wallet address so that it does not have to pay transaction fees
    function excludeFromFee(address account) public onlyOwner {
        _isExcludedFromFee[account] = true;
    }
    
    // Set a wallet address so that it has to pay transaction fees
    function includeInFee(address account) public onlyOwner {
        _isExcludedFromFee[account] = false;
    }


    /*

    SETTING FEES

    Max total fee is limited to 20% (for buy and sell combined)
    Launch fees are set to 10% buy 10% sell

    */
    

    function _set_Fees(uint256 Buy_Fee, uint256 Sell_Fee) external onlyOwner() {

        require((Buy_Fee + Sell_Fee) <= maxPossibleFee, "Fee is too high!");
        _sellFee = Sell_Fee;
        _buyFee = Buy_Fee;

    }



    // Update main wallet
    function Wallet_Update_Dev(address payable wallet) public onlyOwner() {
        Wallet_Dev = wallet;
        _isExcludedFromFee[Wallet_Dev] = true;
    }


    /*

    PROCESSING TOKENS - SET UP

    */
    
    // Toggle on and off to auto process tokens to BNB wallet 
    function set_Swap_And_Liquify_Enabled(bool true_or_false) public onlyOwner {
        swapAndLiquifyEnabled = true_or_false;
        emit SwapAndLiquifyEnabledUpdated(true_or_false);
    }

    // This will set the number of transactions required before the 'swapAndLiquify' function triggers
    function set_Number_Of_Transactions_Before_Liquify_Trigger(uint8 number_of_transactions) public onlyOwner {
        swapTrigger = number_of_transactions;
    }
    


    // This function is required so that the contract can receive BNB from pancakeswap
    receive() external payable {}



    /*

    BLACKLIST 

    This feature is used to block a person from buying - known bot users are added to this
    list prior to launch. We also check for people using snipe bots on the contract before we
    add liquidity and block these wallets. We like all of our buys to be natural and fair.

    */

    // Blacklist - block wallets (ADD - COMMA SEPARATE MULTIPLE WALLETS)
    function blacklist_Add_Wallets(address[] calldata addresses) external onlyOwner {
       
        uint256 startGas;
        uint256 gasUsed;

    for (uint256 i; i < addresses.length; ++i) {
        if(gasUsed < gasleft()) {
        startGas = gasleft();
        if(!_isBlacklisted[addresses[i]]){
        _isBlacklisted[addresses[i]] = true;}
        gasUsed = startGas - gasleft();
    }
    }
    }



    // Blacklist - block wallets (REMOVE - COMMA SEPARATE MULTIPLE WALLETS)
    function blacklist_Remove_Wallets(address[] calldata addresses) external onlyOwner {
       
        uint256 startGas;
        uint256 gasUsed;

    for (uint256 i; i < addresses.length; ++i) {
        if(gasUsed < gasleft()) {
        startGas = gasleft();
        if(_isBlacklisted[addresses[i]]){
        _isBlacklisted[addresses[i]] = false;}
        gasUsed = startGas - gasleft();
    }
    }
    }


    /*

    You can turn the blacklist restrictions on and off.

    During launch, it's a good idea to block known bot users from buying. But these are real people, so 
    when the contract is safe (and the price has increased) you can allow these wallets to buy/sell by setting
    noBlackList to false

    */

    // Blacklist Switch - Turn on/off blacklisted wallet restrictions 
    function blacklist_Switch(bool true_or_false) public onlyOwner {
        noBlackList = true_or_false;
    } 

  
    /*
    
    When sending tokens to another wallet (not buying or selling) if noFeeToTransfer is true there will be no fee

    */

    bool public noFeeToTransfer = true;

    // Option to set fee or no fee for transfer (just in case the no fee transfer option is exploited in future!)
    // True = there will be no fees when moving tokens around or giving them to friends! (There will only be a fee to buy or sell)
    // False = there will be a fee when buying/selling/tranfering tokens
    // Default is true
    function set_Transfers_Without_Fees(bool true_or_false) external onlyOwner {
        noFeeToTransfer = true_or_false;
    }

    /*

    WALLET LIMITS

    Wallets are limited in two ways. The amount of tokens that can be purchased in one transaction
    and the total amount of tokens a wallet can buy. Limiting a wallet prevents one wallet from holding too
    many tokens, which can scare away potential buyers that worry that a whale might dump!

    IMPORTANT

    Solidity can not process decimals, so to increase flexibility, we multiple everything by 100.
    When entering the percent, you need to shift your decimal two steps to the right.

    eg: For 4% enter 400, for 1% enter 100, for 0.25% enter 25, for 0.2% enter 20 etc!

    */

    // Set the Max transaction amount (percent of total supply)
    function set_Max_Transaction_Percent(uint256 maxTxPercent_x100) external onlyOwner() {
        _maxTxAmount = _tTotal*maxTxPercent_x100/10000;
    }    
    
    // Set the maximum wallet holding (percent of total supply)
     function set_Max_Wallet_Percent(uint256 maxWallPercent_x100) external onlyOwner() {
        _maxWalletToken = _tTotal*maxWallPercent_x100/10000;
    }



    // Remove all fees
    function removeAllFee() private {
        if(_TotalFee == 0 && _buyFee == 0 && _sellFee == 0) return;


        _previousBuyFee = _buyFee; 
        _previousSellFee = _sellFee; 
        _previousTotalFee = _TotalFee;
        _buyFee = 0;
        _sellFee = 0;
        _TotalFee = 0;

    }
    
    // Restore all fees
    function restoreAllFee() private {
    
    _TotalFee = _previousTotalFee;
    _buyFee = _previousBuyFee; 
    _sellFee = _previousSellFee; 

    }


    // Approve a wallet to sell tokens
    function _approve(address owner, address spender, uint256 amount) private {

        require(owner != address(0) && spender != address(0), "ERR: zero address");
        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);

    }

    function _transfer(
        address from,
        address to,
        uint256 amount
    ) private {
        

        /*

        TRANSACTION AND WALLET LIMITS

        */
        

        // Limit wallet total
        if (to != owner() &&
            to != Wallet_Dev &&
            to != address(this) &&
            to != uniswapV2Pair &&
            to != Wallet_Burn &&
            from != owner()){
            uint256 heldTokens = balanceOf(to);
            require((heldTokens + amount) <= _maxWalletToken,"You are trying to buy too many tokens. You have reached the limit for one wallet.");}


        // Limit the maximum number of tokens that can be bought or sold in one transaction
        if (from != owner() && to != owner())
            require(amount <= _maxTxAmount, "You are trying to buy more than the max transaction limit.");



        /*

        BLACKLIST RESTRICTIONS

        */
        
        if (noBlackList){
        require(!_isBlacklisted[from] && !_isBlacklisted[to], "This address is blacklisted. Transaction reverted.");}


        require(from != address(0) && to != address(0), "ERR: Using 0 address!");
        require(amount > 0, "Token value must be higher than zero.");


        /*

        PROCESSING

        */


        // SwapAndLiquify is triggered after every X transactions - this number can be adjusted using swapTrigger

        if(
            txCount >= swapTrigger && 
            !inSwapAndLiquify &&
            from != uniswapV2Pair &&
            swapAndLiquifyEnabled 
            )
        {  
            
            txCount = 0;
            uint256 contractTokenBalance = balanceOf(address(this));
            if(contractTokenBalance > _maxTxAmount) {contractTokenBalance = _maxTxAmount;}
            if(contractTokenBalance > 0){
            swapAndLiquify(contractTokenBalance);
        }
        }


        /*

        REMOVE FEES IF REQUIRED

        Fee removed if the to or from address is excluded from fee.
        Fee removed if the transfer is NOT a buy or sell.
        Change fee amount for buy or sell.

        */

        
        bool takeFee = true;
         
        if(_isExcludedFromFee[from] || _isExcludedFromFee[to] || (noFeeToTransfer && from != uniswapV2Pair && to != uniswapV2Pair)){
            takeFee = false;
        } else if (from == uniswapV2Pair){_TotalFee = _buyFee;} else if (to == uniswapV2Pair){_TotalFee = _sellFee;}
        
        _tokenTransfer(from,to,amount,takeFee);
    }



    /*

    PROCESSING FEES

    Fees are added to the contract as tokens, these functions exchange the tokens for BNB and send to the wallet.
    One wallet is used for ALL fees. This includes liquidity, marketing, development costs etc.

    */


    // Send BNB to external wallet
    function sendToWallet(address payable wallet, uint256 amount) private {
            wallet.transfer(amount);
        }


    // Processing tokens from contract
    function swapAndLiquify(uint256 contractTokenBalance) private lockTheSwap {
        
        swapTokensForBNB(contractTokenBalance);
        uint256 contractBNB = address(this).balance;
        sendToWallet(Wallet_Dev,contractBNB);
    }


    // Manual Token Process Trigger - Enter the percent of the tokens that you'd like to send to process
    function process_Tokens_Now (uint256 percent_Of_Tokens_To_Process) public onlyOwner {
        // Do not trigger if already in swap
        require(!inSwapAndLiquify, "Currently processing, try later."); 
        if (percent_Of_Tokens_To_Process > 100){percent_Of_Tokens_To_Process == 100;}
        uint256 tokensOnContract = balanceOf(address(this));
        uint256 sendTokens = tokensOnContract*percent_Of_Tokens_To_Process/100;
        swapAndLiquify(sendTokens);
    }


    // Swapping tokens for BNB using PancakeSwap 
    function swapTokensForBNB(uint256 tokenAmount) private {

        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = uniswapV2Router.WETH();
        _approve(address(this), address(uniswapV2Router), tokenAmount);
        uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
            tokenAmount,
            0, 
            path,
            address(this),
            block.timestamp
        );
    }

    /*

    PURGE RANDOM TOKENS - Add the random token address and a wallet to send them to

    */

    // Remove random tokens from the contract and send to a wallet
    function remove_Random_Tokens(address random_Token_Address, address send_to_wallet, uint256 number_of_tokens) public onlyOwner returns(bool _sent){
        require(random_Token_Address != address(this), "Can not remove native token");
        uint256 randomBalance = IERC20(random_Token_Address).balanceOf(address(this));
        if (number_of_tokens > randomBalance){number_of_tokens = randomBalance;}
        _sent = IERC20(random_Token_Address).transfer(send_to_wallet, number_of_tokens);
    }


    /*
    
    UPDATE PANCAKESWAP ROUTER AND LIQUIDITY PAIRING

    */


    // Set new router and make the new pair address
    function set_New_Router_and_Make_Pair(address newRouter) public onlyOwner() {
        IUniswapV2Router02 _newPCSRouter = IUniswapV2Router02(newRouter);
        uniswapV2Pair = IUniswapV2Factory(_newPCSRouter.factory()).createPair(address(this), _newPCSRouter.WETH());
        uniswapV2Router = _newPCSRouter;
    }
   
    // Set new router
    function set_New_Router_Address(address newRouter) public onlyOwner() {
        IUniswapV2Router02 _newPCSRouter = IUniswapV2Router02(newRouter);
        uniswapV2Router = _newPCSRouter;
    }
    
    // Set new address - This will be the 'Cake LP' address for the token pairing
    function set_New_Pair_Address(address newPair) public onlyOwner() {
        uniswapV2Pair = newPair;
    }

    /*

    TOKEN TRANSFERS

    */

    // Check if token transfer needs to process fees
    function _tokenTransfer(address sender, address recipient, uint256 amount,bool takeFee) private {
        
        
        if(!takeFee){
            removeAllFee();
            } else {
                txCount++;
            }
            _transferTokens(sender, recipient, amount);
        
        if(!takeFee)
            restoreAllFee();
    }

    // Redistributing tokens and adding the fee to the contract address
    function _transferTokens(address sender, address recipient, uint256 tAmount) private {
        (uint256 tTransferAmount, uint256 tDev) = _getValues(tAmount);
        _tOwned[sender] = _tOwned[sender].sub(tAmount);
        _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
        _tOwned[address(this)] = _tOwned[address(this)].add(tDev);   
        emit Transfer(sender, recipient, tTransferAmount);
    }


    // Calculating the fee in tokens
    function _getValues(uint256 tAmount) private view returns (uint256, uint256) {
        uint256 tDev = tAmount*_TotalFee/100;
        uint256 tTransferAmount = tAmount.sub(tDev);
        return (tTransferAmount, tDev);
    }



    


}
// This function is required so that the contract can receive BNB from pancakeswap