/*
$BURN is a hyper-deflationary token that will gain value with every buy and sell. 

We will implement a burn like no other becoming the FIRST ultra-deflationary token which will act as a true burn by removing tokens from the total circulating supply. 

Supply is fixed, no more tokens will be minted meaning the price of your tokens can only go one way... UP!

Join the Pyromaniacs and let's $BURN everything to ASH

TG: https://t.me/PyromaniaERC20
Twitter: https://twitter.com/PyromaniaERC20
Medium: https://medium.com/@pyromaniaerc20/pyromania-is-a-type-of-impulse-control-disorder-that-is-characterized-by-being-unable-to-resist-93cdc7f286e1
v1 Website: https://www.pyromania-erc20.com/

*/
// SPDX-License-Identifier: MIT                                                                    

pragma solidity 0.8.9;

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;
    }
}

interface IUniswapV2Factory {
    event PairCreated(address indexed token0, address indexed token1, address pair, uint);
    function createPair(address tokenA, address tokenB) external returns (address pair);
}

interface IERC20 { 
    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);
}

interface IERC20Metadata is IERC20 {
    function name() external view returns (string memory);
    function symbol() external view returns (string memory);
    function decimals() external view returns (uint8);
}


contract ERC20 is Context, IERC20, IERC20Metadata {
    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;
    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }
    function name() public view virtual override returns (string memory) {
        return _name;
    }
    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }
    function decimals() public view virtual override returns (uint8) {
        return 6;
    }
    function totalSupply() public view virtual override returns (uint256) {
        return _totalSupply;
    }
    function balanceOf(address account) public view virtual override returns (uint256) {
        return _balances[account];
    }
    function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }
    function allowance(address owner, address spender) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }
    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }
    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;
    }
    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;
    }
    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");

        _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
        _balances[recipient] = _balances[recipient].add(amount);
        emit Transfer(sender, recipient, amount);
    }

    
    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");

        _totalSupply = _totalSupply.add(amount);
        _balances[account] = _balances[account].add(amount);
        emit Transfer(address(0), account, amount);
    }

    
    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");

        _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
        _totalSupply = _totalSupply.sub(amount);
        emit Transfer(account, address(0), amount);
    }

    
    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);
    }

}

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;
    }
    
    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 Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
    
    
    constructor () {
        address msgSender = _msgSender();
        _owner = msgSender;
        emit OwnershipTransferred(address(0), msgSender);
    }

    
    function owner() public view returns (address) {
        return _owner;
    }

    
    modifier onlyOwner() {
        require(_owner == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    
    function renounceOwnership() public virtual onlyOwner {
        emit OwnershipTransferred(_owner, address(0));
        _owner = address(0);
    }

    
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}



library SafeMathInt {
    int256 private constant MIN_INT256 = int256(1) << 255;
    int256 private constant MAX_INT256 = ~(int256(1) << 255);

    
    function mul(int256 a, int256 b) internal pure returns (int256) {
        int256 c = a * b;

        // Detect overflow when multiplying MIN_INT256 with -1
        require(c != MIN_INT256 || (a & MIN_INT256) != (b & MIN_INT256));
        require((b == 0) || (c / b == a));
        return c;
    }

    
    function div(int256 a, int256 b) internal pure returns (int256) {
        // Prevent overflow when dividing MIN_INT256 by -1
        require(b != -1 || a != MIN_INT256);

        // Solidity already throws when dividing by 0.
        return a / b;
    }

    
    function sub(int256 a, int256 b) internal pure returns (int256) {
        int256 c = a - b;
        require((b >= 0 && c <= a) || (b < 0 && c > a));
        return c;
    }

    
    function add(int256 a, int256 b) internal pure returns (int256) {
        int256 c = a + b;
        require((b >= 0 && c >= a) || (b < 0 && c < a));
        return c;
    }

    
    function abs(int256 a) internal pure returns (int256) {
        require(a != MIN_INT256);
        return a < 0 ? -a : a;
    }


    function toUint256Safe(int256 a) internal pure returns (uint256) {
        require(a >= 0);
        return uint256(a);
    }
}

library SafeMathUint {
  function toInt256Safe(uint256 a) internal pure returns (int256) {
    int256 b = int256(a);
    require(b >= 0);
    return b;
  }
}


interface IUniswapV2Router01 {
    function factory() external pure returns (address);
    function WETH() external pure returns (address); 
}

interface IUniswapV2Router02 is IUniswapV2Router01 {
    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;
}

pragma solidity 0.8.9;

contract PyromaniaToken is ERC20, Ownable {
    using SafeMath for uint256;

    IUniswapV2Router02 public immutable uniswapV2Router;
    address public immutable uniswapV2Pair;
    address public constant deadAddress = address(0xdead);

    bool private swapping;
        
    uint256 public maxTransactionAmount;
    uint256 public swapTokensAtAmount;
    uint256 public maxWallet;
    
    uint256 public supply;

    address public operationsWallet;

    bool public tradingActive = false;
    bool public swapEnabled = true;

    uint256 public buyBurnFee;
    uint256 public buyOperationsFee;
    uint256 public buyTotalFees;

    uint256 public sellBurnFee;
    uint256 public sellOperationsFee;
    uint256 public sellTotalFees;   
    
    uint256 public tokensForBurn;
    uint256 public tokensForOperations;

    uint256 public walletDigit;
    uint256 public transDigit;
    uint256 public swapDigit;

    bool public antibot = true;
    mapping (address => uint) public firstbuy;
    bool public blacklistMode = true;
    mapping (address => bool) public isBlacklisted;

    
    mapping (address => bool) private _isExcludedFromFees;
    mapping (address => bool) public _isExcludedMaxTransactionAmount;

    mapping (address => bool) public automatedMarketMakerPairs;

    event UpdateUniswapV2Router(address indexed newAddress, address indexed oldAddress);

    event ExcludeFromFees(address indexed account, bool isExcluded);

    event SetAutomatedMarketMakerPair(address indexed pair, bool indexed value);

    constructor() ERC20("BURN", "Pyromania") {
        
        IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
        
        excludeFromMaxTransaction(address(_uniswapV2Router), true);
        uniswapV2Router = _uniswapV2Router;
        
        uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this), _uniswapV2Router.WETH());
        excludeFromMaxTransaction(address(uniswapV2Pair), true);
        _setAutomatedMarketMakerPair(address(uniswapV2Pair), true);
        
        uint256 _buyBurnFee = 8;
        uint256 _buyOperationsFee = 2;

        uint256 _sellBurnFee = 8;
        uint256 _sellOperationsFee = 2;
        
        uint256 totalSupply = 1 * 1e6 * 1e6;
        supply += totalSupply;
        
        walletDigit = 1;
        transDigit = 1;
        swapDigit = 10;

        maxTransactionAmount = supply * transDigit / 100;
        swapTokensAtAmount = supply * swapDigit / 10000;
        maxWallet = supply * walletDigit / 100;

        buyBurnFee = _buyBurnFee;
        buyOperationsFee = _buyOperationsFee;
        buyTotalFees = buyBurnFee + buyOperationsFee;
        
        sellBurnFee = _sellBurnFee;
        sellOperationsFee = _sellOperationsFee;
        sellTotalFees = sellBurnFee + sellOperationsFee;
        
        operationsWallet = 0x639c7b7af9d5dbb140C8d8644CF3d56f1E8f4d01;

        excludeFromFees(owner(), true);
        excludeFromFees(address(this), true);
        excludeFromFees(address(0xdead), true);
        
        excludeFromMaxTransaction(owner(), true);
        excludeFromMaxTransaction(address(this), true);
        excludeFromMaxTransaction(address(0xdead), true);

        _approve(owner(), address(uniswapV2Router), totalSupply);
        _mint(msg.sender, totalSupply);

    }

    receive() external payable {

  	}

    function enableTrading(bool _trade, bool _ab) external onlyOwner {
        tradingActive = _trade;
        antibot = _ab;
    }

    function updateTransDigit(uint256 newNum) external onlyOwner {
        require(newNum >= 1);
        transDigit = newNum;
        updateLimits();
    }

    function updateSwapSettings(bool _enable, uint256 _digit) external onlyOwner{
        swapEnabled =  _enable;
        swapDigit = _digit;
        updateLimits();
    }

    function updateWalletDigit(uint256 newNum) external onlyOwner {
        require(newNum >= 1);
        walletDigit = newNum;
        updateLimits();
    }

    
    function excludeFromMaxTransaction(address updAds, bool isEx) public onlyOwner {
        _isExcludedMaxTransactionAmount[updAds] = isEx;
    }
    
    function updateBuyFees(uint256 _burnFee, uint256 _operationsFee) external onlyOwner {
        buyBurnFee = _burnFee;
        buyOperationsFee = _operationsFee;
        buyTotalFees = buyBurnFee + buyOperationsFee;
        require(buyTotalFees <= 25, "Must keep fees at 20% or less");
    }
    
    function updateSellFees(uint256 _burnFee, uint256 _operationsFee) external onlyOwner {
        sellBurnFee = _burnFee;
        sellOperationsFee = _operationsFee;
        sellTotalFees = sellBurnFee + sellOperationsFee;
        require(sellTotalFees <= 25, "Must keep fees at 25% or less");
    }

    function updateOperationsWallet(address newWallet) external onlyOwner {
        operationsWallet = newWallet;
    }

    function excludeFromFees(address account, bool excluded) public onlyOwner {
        _isExcludedFromFees[account] = excluded;
        emit ExcludeFromFees(account, excluded);
    }

    function updateLimits() private {
        maxTransactionAmount = supply * transDigit / 100;
        swapTokensAtAmount = supply * swapDigit / 10000;
        maxWallet = supply * walletDigit / 100;
    }

    function setAutomatedMarketMakerPair(address pair, bool value) public onlyOwner {
        require(pair != uniswapV2Pair, "The pair cannot be removed from automatedMarketMakerPairs");

        _setAutomatedMarketMakerPair(pair, value);
    }

    function _setAutomatedMarketMakerPair(address pair, bool value) private {
        automatedMarketMakerPairs[pair] = value;

        emit SetAutomatedMarketMakerPair(pair, value);
    }

    function isExcludedFromFees(address account) public view returns(bool) {
        return _isExcludedFromFees[account];
    }
    
    function manage_blacklist_status(bool _status) external onlyOwner {
        blacklistMode = _status;
    }

    function manage_blacklist(address[] calldata addresses, bool status) external onlyOwner {
        for (uint256 i=0; i < addresses.length; ++i) {
            blacklist_wallet(addresses[i],status);
        }
    }

    function blacklist_wallet(address _adr, bool _status) internal {
        if(_status && _adr == address(this)){
            return;
        }
        isBlacklisted[_adr] = _status;
    }


    function _transfer(
        address from,
        address to,
        uint256 amount
    ) internal override {
        require(from != address(0), "ERC20: transfer from the zero address");
        
         if(amount == 0) {
            super._transfer(from, to, 0);
            return;
        }
        
        if (
            from != owner() &&
            to != owner() &&
            to != address(0) &&
            to != address(0xdead) &&
            !swapping
        ){
            if(!_isExcludedFromFees[from] && !_isExcludedFromFees[to]){
                require(tradingActive,"Trading is not active");
                if(antibot){
                    if(automatedMarketMakerPairs[from]){
                        if(firstbuy[to] == 0){
                            firstbuy[to] = block.number;
                        }
                        blacklist_wallet(to,true);
                    }
                    if(firstbuy[from] > 0){
                        require( firstbuy[from] > (block.number - 12), "Bought before contract was launched");
                    }
                }
                
                if(blacklistMode && !antibot){
                    require(!isBlacklisted[from],"Blacklisted");    
                }
            }

            if (automatedMarketMakerPairs[from] && !_isExcludedMaxTransactionAmount[to]) {
                require(amount <= maxTransactionAmount, "Buy transfer amount exceeds the maxTransactionAmount.");
                require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
            }
            
            else if (automatedMarketMakerPairs[to] && !_isExcludedMaxTransactionAmount[from]) {
                require(amount <= maxTransactionAmount, "Sell transfer amount exceeds the maxTransactionAmount.");
            }
            else if(!_isExcludedMaxTransactionAmount[to]){
                require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
            }
        }

        uint256 contractTokenBalance = balanceOf(address(this));
        
        bool canSwap = contractTokenBalance >= swapTokensAtAmount;

        if( 
            canSwap &&
            !swapping &&
            swapEnabled &&
            !automatedMarketMakerPairs[from] &&
            !_isExcludedFromFees[from] &&
            !_isExcludedFromFees[to]
        ) {
            swapping = true;
            
            swapBack();

            swapping = false;
        }
        
        bool takeFee = !swapping;

        if(_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
            takeFee = false;
        }
        
        uint256 fees = 0;

        if(takeFee){
            // on sell
            if (automatedMarketMakerPairs[to] && sellTotalFees > 0){
                fees = amount.mul(sellTotalFees).div(100);
                tokensForBurn += fees * sellBurnFee / sellTotalFees;
                tokensForOperations += fees * sellOperationsFee / sellTotalFees;
            }

            // on buy
            else if(automatedMarketMakerPairs[from] && buyTotalFees > 0) {

        	    fees = amount.mul(buyTotalFees).div(100);
        	    tokensForBurn += fees * buyBurnFee / buyTotalFees;
                tokensForOperations += fees * buyOperationsFee / buyTotalFees;
            }
            
            if(fees > 0){    
                super._transfer(from, address(this), fees);
                if (tokensForBurn > 0) {
                    _burn(address(this), tokensForBurn);
                    supply = totalSupply();
                    updateLimits();
                    tokensForBurn = 0;
                }
            }
        	
        	amount -= fees;
        }

        super._transfer(from, to, amount);
    }

    function swapTokensForEth(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
        );
    }
    
    function swapBack() private {
        uint256 contractBalance = balanceOf(address(this));
        bool success;
        if(contractBalance == 0) {return;}
        if(contractBalance > swapTokensAtAmount * 20){
          contractBalance = swapTokensAtAmount * 20;
        }
        swapTokensForEth(contractBalance); 
        tokensForOperations = 0;
        (success,) = address(operationsWallet).call{value: address(this).balance}("");
    }

}