// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

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);

    constructor() {
        _transferOwnership(_msgSender());
    }

    function owner() public view virtual returns (address) {
        return _owner;
    }

    modifier onlyOwner() {
        require(owner() == _msgSender(),
         "Ownable: caller is not the owner");
        _;
    }

    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0),
         "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

    function getTime() public view returns (uint256) {
        return block.timestamp;
    }

    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;  _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}


interface IERC20 {

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

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

    function decimals() external view returns (uint8);

    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);

    event Transfer(address indexed from,
     address indexed to,
     uint256 value);

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


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 XELON 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 ERC20 is Context, IERC20 {
    using SafeMath for uint256;

    mapping(address => uint256) private _balances;

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

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;
    uint8 private _decimals;

    /**
     * @dev Sets the values for {name} and {symbol}.
     *
     * The default value of {decimals} is 18. To select a different value for
     * {decimals} you should overload it.
     *
     * All two of these values are immutable: they can only be set once during
     * construction.
     */
    constructor(string memory name_, string memory symbol_,uint8 decimals_) {
        _name = name_;
        _symbol = symbol_;
        _decimals = decimals_;
    }

    /**
     * @dev Returns the name of the token.
     */
    function name() public view virtual override returns (string memory) {
        return _name;
    }

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    /**
     * @dev Returns the number of decimals used to get its user representation.
     * For example, if `decimals` equals `2`, a balance of `505` tokens should
     * be displayed to a user as `5,05` (`505 / 10 ** 2`).
     *
     * Tokens usually opt for a value of 18, XELON imitating the relationship between
     * Ether and Wei. This is the value {ERC20} uses, unless this function is
     * overridden;
     *
     * NOTE: This information is only used for _display_ purposes: it in
     * no way affects any of the arithmetic of the contract, including
     * {IERC20-balanceOf} and {IERC20-transfer}.
     */
    function decimals() public view virtual override returns (uint8) {
        return _decimals;
    }

    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply() public view virtual override returns (uint256) {
        return _totalSupply;
    }

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view virtual override returns (uint256) {
        return _balances[account];
    }

    /**
     * @dev See {IERC20-transfer}.
     *
     * Requirements:
     *
     * - `recipient` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

    /**
     * @dev See {IERC20-allowance}.
     */
    function allowance(address owner,
     address spender) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }

    /**
     * @dev See {IERC20-approve}.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        _approve(_msgSender(),
         spender,
          amount);
        return true;
    }

    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {ERC20}.
     *
     * Requirements:
     *
     * - `sender` and `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     * - the caller must have allowance for ``sender``'s tokens of at least
     * `amount`.
     */
    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) public virtual override returns (bool) {
        _transfer(sender,
         recipient, amount);
        _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount,
         "ERC20: transfer amount exceeds allowance"));
        return true;
    }

    /**
     * @dev Atomically increases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender,
         _allowances[_msgSender()][spender].add(addedValue));
        return true;
    }

    /**
     * @dev Atomically decreases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `spender` must have allowance for the caller of at least
     * `subtractedValue`.
     */
    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;
    }

    /**
     * @dev Moves tokens `amount` from `sender` to `recipient`.
     *
     * This is internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, XELON slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * Requirements:
     *
     * - `sender` cannot be the zero address.
     * - `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     */
    function _transfer(
        address sender,
        address recipient,
        uint256 amount
    ) internal virtual {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");

        _beforeTokenTransfer(sender, recipient, amount);

        _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
        _balances[recipient] = _balances[recipient].add(amount);
        emit Transfer(sender, recipient, amount);
    }

    /** @dev Creates `amount` tokens and assigns them to `account`, increasing
     * the total supply.
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     */
    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: XELON mint to the zero address");

        _beforeTokenTransfer(address(0), account, amount);

        _totalSupply = _totalSupply.add(amount);
        _balances[account] = _balances[account].add(amount);
        emit Transfer(address(0), account, amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`, reducing the
     * total supply.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     * - `account` must have at least `amount` tokens.
     */
    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");

        _beforeTokenTransfer(account, address(0), amount);

        _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
        _totalSupply = _totalSupply.sub(amount);
        emit Transfer(account, address(0), amount);
    }

    /**
     * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
     *
     * This internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     */
    function _approve(
        address owner, address spender,
        uint256 amount
    ) internal virtual {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");

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

    /**
     * @dev Hook that is called before any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * will be to transferred to `to`.
     * - when `from` is zero, `amount` tokens will be minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens will be burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {}
}

interface IUniswapV2Router01 {
    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);


}

interface IUniswapV2Router02 is IUniswapV2Router01 {

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

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

}

interface IUniswapV2Factory {

    function getPair(address tokenA, address tokenB) external view returns (address pair);

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

interface IUniswapV2Pair {

    function decimals() external pure returns (uint8);

    function totalSupply() external view returns (uint);

    function balanceOf(address owner) external view returns (uint);

    function token0() external view returns (address);

    function token1() external view returns (address);

    function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);

}

contract usdtReceiver {
    address public usdt;
    address public owner;
    constructor(address _u) {
        usdt = _u;
        owner = msg.sender;
        IERC20(usdt).approve(msg.sender,~uint256(0));
    }
}

contract XELON is ERC20, Ownable {
    using SafeMath for uint256;

    IUniswapV2Router02 public uniswapV2Router;
    address public  uniswapPair;

    bool private swapping;

    uint256 public swapTokensAtAmount;

    uint256 public buyTokenRewardsFee;
    uint256 public sellTokenRewardsFee;

    uint256 public buyLiquidityFee;
    uint256 public sellLiquidityFee;

    uint256 public buyMarketingFee;
    uint256 public sellMarketingFee;

    uint256 public buyDeadFee;
    uint256 public sellDeadFee;

    uint256 public AmountLiquidityFee;
    uint256 public AmountTokenRewardsFee;
    uint256 public AmountMarketingFee;

    uint256 public addLiquidityFee;
    uint256 public removeLiquidityFee;

    usdtReceiver public _usdtReceiver;
    address public deadWallet = 0x000000000000000000000000000000000000dEaD;
    address public usdtAddress;
    address public _marketingWalletAddress;
    address public rewardsAddress;
    uint256 public gasForProcessing;
    bool public swapAndLiquifyEnabled = true;

    // store addresses that a automatic market maker pairs. Any transfer *to* these addresses
    // could be subject to a maximum transfer amount
    mapping(address => bool) public automatedMarketMakerPairs;

    event UpdateDividendTracker(address indexed newAddress, address indexed oldAddress);

    event UpdateUniswapV2Router(address indexed newAddress, address indexed oldAddress);

    event ExcludeFromFees(address indexed account, bool isExcluded);
    event ExcludeMultipleAccountsFromFees(address[] accounts, bool isExcluded);

    event SetAutomatedMarketMakerPair(address indexed pair, bool indexed value);

    event LiquidityWalletUpdated(address indexed newLiquidityWallet, address indexed oldLiquidityWallet);

    event GasForProcessingUpdated(uint256 indexed newValue, uint256 indexed oldValue);

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

    event SendDividends(
        uint256 tokensSwapped,
        uint256 amount
    );

    event ProcessedDividendTracker(
        uint256 iterations,
        uint256 claims,
        uint256 lastProcessedIndex,
        bool indexed automatic,
        uint256 gas,
        address indexed processor
    );

    constructor() payable ERC20("XELON", "XELON",18)  {

        uint256 totalSupply = 100000000 * (10 ** 18);
        // use by default 300,000 gas to process auto-claiming dividends
        gasForProcessing = 300000;

        IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
        uniswapV2Router = _uniswapV2Router;

        
        _mint(owner(), totalSupply);
    }
    receive() external payable {}



    function setAutomatedMarketMakerPair(address pair, bool value) public onlyOwner {
        require(pair != uniswapPair, "The PancakeSwap pair cannot be removed from automatedMarketMakerPairs");
        _setAutomatedMarketMakerPair(pair, value);
    }

    function _setAutomatedMarketMakerPair(address pair, bool value) private {
        require(automatedMarketMakerPairs[pair] != value, "Automated market XELON maker pair is already set to that value");
        automatedMarketMakerPairs[pair] = value;
        emit SetAutomatedMarketMakerPair(pair, value);
    }


    function updateGasForProcessing(uint256 newValue) public onlyOwner {
        require(newValue != gasForProcessing, "Cannot update gasForProcessing to same value");
        emit GasForProcessingUpdated(newValue, gasForProcessing);
        gasForProcessing = newValue;
    }


    function setSwapAndLiquifyEnabled(bool _enabled) public onlyOwner {
        swapAndLiquifyEnabled = _enabled;
    }


    function setSwapTokensAtAmount(uint256 amount) public onlyOwner {
        swapTokensAtAmount = amount;
    }




    function _transfer(
        address from,
        address to,
        uint256 amount
    ) internal override {
        require(from != address(0), "ERC20: transfer from the zero address");
        require(to != address(0), "ERC20: transfer to XELON the zero address");

        if (amount == 0) {
            super._transfer(from, to, 0);
            return;
        }

        uint256 contractTokenBalance = balanceOf(address(this));

        bool canSwap = contractTokenBalance >= swapTokensAtAmount;

        if (canSwap &&
            !swapping &&
            automatedMarketMakerPairs[from] &&
            from != owner() &&
            to != owner() &&
            swapAndLiquifyEnabled
        ) {
            swapping = true;
            swapAndSendMarketing(AmountMarketingFee);
            swapAndLiquify(AmountLiquidityFee);
            swapAndSendDividends(AmountTokenRewardsFee);
            swapping = false;
        }


        bool takeFee = !swapping;

        if(takeFee) {
            uint256 fees;
            uint256 LFee; // Liquidity
            uint256 RFee; // Rewards
            uint256 MFee; // Marketing
            uint256 DFee; // Dead

            if(automatedMarketMakerPairs[from]){
                LFee = amount.mul(buyLiquidityFee).div(100);
                AmountLiquidityFee += LFee;
                RFee = amount.mul(buyTokenRewardsFee).div(100);
                AmountTokenRewardsFee += RFee;
                MFee = amount.mul(buyMarketingFee).div(100);
                AmountMarketingFee += MFee;
                DFee = amount.mul(buyDeadFee).div(100);
                fees = LFee.add(RFee).add(MFee).add(DFee);
            }else if(automatedMarketMakerPairs[to]){
                LFee = amount.mul(sellLiquidityFee).div(100);
                AmountLiquidityFee += LFee;
                RFee = amount.mul(sellTokenRewardsFee).div(100);
                AmountTokenRewardsFee += RFee;
                MFee = amount.mul(sellMarketingFee).div(100);
                AmountMarketingFee += MFee;
                DFee = amount.mul(sellDeadFee).div(100);
                fees = LFee.add(RFee).add(MFee).add(DFee);
            }


            amount = amount.sub(fees);
            if(DFee > 0) super._transfer(from, deadWallet, DFee);
            if(fees > 0) super._transfer(from, address(this), fees.sub(DFee));
        }


        super._transfer(from, to, amount);

    }



    function swapAndSendMarketing(uint256 tokens) private {
        // generate the uniswap pair path of token -> weth
        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = usdtAddress;
        if(usdtAddress == uniswapV2Router.WETH()){
            // make the swap
            uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
                tokens,
                0, // accept any amount of ETH
                path,
                _marketingWalletAddress, // The contract
                block.timestamp
            );
        }else{
            // make the swap
            uniswapV2Router.swapExactTokensForTokensSupportingFeeOnTransferTokens(
                tokens,
                0, // accept any amount of USDT
                path,
                _marketingWalletAddress,
                block.timestamp
            );
        }
        AmountMarketingFee = AmountMarketingFee - tokens;
    }

    function swapAndLiquify(uint256 tokens) private {
       // split the contract balance into halves
        uint256 half = tokens.div(2);
        uint256 otherHalf = tokens.sub(half);

        uint256 initialBalance = IERC20(usdtAddress).balanceOf(address(this));

        // swap tokens for ETH
        swapTokensForUsdt(half,address(this)); // <- this breaks the ETH -> HATE swap when swap+liquify is triggered

        // how much ETH did we just swap into?
        uint256 newBalance = IERC20(usdtAddress).balanceOf(address(this)).sub(initialBalance);

        // add liquidity to uniswap
        addLiquidityUSDT(otherHalf, newBalance);
        AmountLiquidityFee = AmountLiquidityFee - tokens;
        emit SwapAndLiquify(half, newBalance, otherHalf);
    }

    function addLiquidityUSDT(uint256 tokenAmount, uint256 USDTAmount) private {
        // approve token transfer to cover all possible scenarios
        IERC20(usdtAddress).approve(address(uniswapV2Router),USDTAmount);
        // add the liquidity
        uniswapV2Router.addLiquidity(
            address(this),
            usdtAddress,
            tokenAmount,
            USDTAmount,
            0, // slippage is unavoidable
            0, // slippage is unavoidable
            _marketingWalletAddress,
            block.timestamp
        );
    }

    function swapTokensForUsdt(uint256 tokenAmount,address addr) private {
        // generate the uniswap pair path of token -> weth
        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = usdtAddress;
        // make the swap
        uniswapV2Router.swapExactTokensForTokensSupportingFeeOnTransferTokens(
            tokenAmount,
            0, // accept any amount of USDT
            path,
            address(_usdtReceiver),
            block.timestamp
        );
        uint256 amount = IERC20(usdtAddress).balanceOf(address(_usdtReceiver));
        IERC20(usdtAddress).transferFrom(address(_usdtReceiver),addr, amount);
    }

    function swapTokensForRewards(uint256 tokenAmount) private {
        // generate the uniswap pair path of token -> weth -> rewards
        address[] memory path = new address[](3);
        path[0] = address(this);
        path[1] = usdtAddress;
        path[2] = rewardsAddress;
        // make the swap
        try
            uniswapV2Router.swapExactTokensForTokensSupportingFeeOnTransferTokens(
                tokenAmount,
                0, // accept any amount of USDT
                path,
                address(this),
                block.timestamp
            )
        {}catch{}

    }

    function swapAndSendDividends(uint256 tokens) private {
        // Judging whether to distribute dividends in the local currency
        if(usdtAddress == rewardsAddress){
            swapTokensForUsdt(tokens,address(this));
        }else{
            swapTokensForRewards(tokens);
        }
        AmountTokenRewardsFee = AmountTokenRewardsFee - tokens;
    }


}

{
  "compilationTarget": {
    "XELON.sol": "XELON"
  },
  "evmVersion": "shanghai",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": false,
    "runs": 200
  },
  "remappings": []
}