// SPDX-License-Identifier: Unlicensed

pragma solidity ^0.6.12;

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);
}

 
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;
        // 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;
    }
}

abstract contract Context {
    function _msgSender() internal view virtual returns (address payable) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes memory) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}


library Address {

    function isContract(address account) internal view returns (bool) {
        bytes32 codehash;
        bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
        assembly { codehash := extcodehash(account) }
        return (codehash != accountHash && codehash != 0x0);
    }


    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");
        (bool success, ) = recipient.call{ value: amount }("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }


    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
      return functionCall(target, data, "Address: low-level call failed");
    }


    function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
        return _functionCallWithValue(target, data, 0, errorMessage);
    }


    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }


    function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        return _functionCallWithValue(target, data, value, errorMessage);
    }

    function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) 
    {
        require(isContract(target), "Address: call to non-contract");
        (bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
        if (success) {
            return returndata;
        } else {
            if (returndata.length > 0) 
            {
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}


contract Ownable is Context {
    address private _owner;
    address private _previousOwner;
    uint256 private _lockTime;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
    constructor () internal {
        address msgSender = _msgSender();
        _owner = msg.sender;
        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;
    }

    function getUnlockTime() public view returns (uint256) {
        return _lockTime;
    }


    function lock(uint256 time) public virtual onlyOwner {
        _previousOwner = _owner;
        _owner = address(0);
        _lockTime = now + time;
        emit OwnershipTransferred(_owner, address(0));
    }
    

    function unlock() public virtual {
        require(_previousOwner == msg.sender, "You don't have permission to unlock");
       // require(now < _lockTime , "Contract is locked until 7 days");
        emit OwnershipTransferred(_owner, _previousOwner);
        _owner = _previousOwner;
    }
}

contract Pausable is Ownable {

    event Paused(address account);
    event Unpaused(address account);

    bool private _paused;

    modifier whenNotPaused() 
    {
        require(!_paused, "Pausable: paused");
        _;
    }

    modifier whenPaused() {
        require(_paused, "Pausable: not paused");
        _;
    }

    constructor() internal {}

    function paused(
    ) public view returns (bool) 
    {
        return _paused;
    }

    function pause(
    ) public 
        onlyOwner 
        whenNotPaused 
    {
        _paused = true;
        emit Paused(msg.sender);
    }

    function unpause(
    ) public 
        onlyOwner 
        whenPaused 
    {
        _paused = false;
        emit Unpaused(msg.sender);
    }
}
contract ButterFlyEffectToken is Context, IERC20, Ownable , Pausable
{
    using SafeMath for uint256;
    using Address for address;
    event Log(string, uint256);
    mapping (address => uint256) private _rOwned;
    mapping (address => uint256) private _tOwned;
    mapping (address => mapping (address => uint256)) private _allowances;

    mapping (address => bool) private _isExcludedFromFee;

    mapping (address => bool) private _isExcluded;
    address[] private _excluded;
   
    uint256 private constant MAX = ~uint256(0);
    uint256 private _tTotal = 16180000000 * 10**12;
    uint256 private _rTotal = (MAX - (MAX % _tTotal));
    uint256 private _tFeeTotal;

    string private _name = "Butterfly effect Token";
    string private _symbol = "BFET";
    uint8 private _decimals = 12;
    
    uint256 public _taxFee = 20;
    uint256 private _previousTaxFee = _taxFee;

    uint256 public _marketingFee = 10;
    uint256 private _previousMarketingFee = _marketingFee;

    address public marketingWallet = 0x8B805227f29B2F80E66d987d2b7D99916cB8A0cA;

    uint256 public _maxTxAmount = 1618000000 * 10**12;

    event MinTokensBeforeSwapUpdated(uint256 minTokensBeforeSwap);
    event SwapAndLiquifyEnabledUpdated(bool enabled);
    event SwapAndLiquify(
        uint256 tokensSwapped,
        uint256 ethReceived,
        uint256 tokensIntoLiqudity
    );
    

    
    constructor () public 
    {
        _rOwned[_msgSender()] = _rTotal;
        _isExcludedFromFee[owner()] = true;
        _isExcludedFromFee[address(this)] = true;
        emit Transfer(address(0), _msgSender(), _tTotal);
    }

    
    function restoreAllFee() private 
    {
        _taxFee = _previousTaxFee;
        _marketingFee = _previousMarketingFee;
    }
    
    
    function removeAllFee() private 
    {
        _taxFee = 0;
        _marketingFee = 0;
    }
    
    

    function afterPreSale() external onlyOwner 
    {
        _taxFee = 20;
        _previousTaxFee = _taxFee;
        _marketingFee = 10;
        _previousMarketingFee = _marketingFee;
    }

   function SetFee(uint256 TaxFee, uint256 MarketingFee) public virtual onlyOwner 
   {
        _taxFee = TaxFee;
        _previousTaxFee = _taxFee;
        _marketingFee = MarketingFee;
        _previousMarketingFee = _marketingFee;
    }
    
    function prepareForPreSale() external onlyOwner 
    {
        _taxFee = 0;
        _previousTaxFee = _taxFee;
        _marketingFee = 0;
        _previousMarketingFee = _marketingFee;
    }   
    

    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) {
         require(!paused(), "ERC20Pausable: token transfer while paused");
        if (_isExcluded[account]) return _tOwned[account];
        return tokenFromReflection(_rOwned[account]);
    }

    function transfer(address recipient, uint256 amount) public override returns (bool) {
         require(!paused(), "ERC20Pausable: token transfer while paused");
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

    function allowance(address owner, address spender) public view override returns (uint256) {
         require(!paused(), "ERC20Pausable: token transfer while paused");
        return _allowances[owner][spender];
    }

    function approve(address spender, uint256 amount) public override returns (bool) {
         require(!paused(), "ERC20Pausable: token transfer while paused");
        _approve(_msgSender(), spender, amount);
        return true;
    }

    function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
         require(!paused(), "ERC20Pausable: token transfer while paused");
        _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) {
         require(!paused(), "ERC20Pausable: token transfer while paused");
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
        return true;
    }

    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
         require(!paused(), "ERC20Pausable: token transfer while paused");
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
        return true;
    }

    function isExcludedFromReward(address account) public view returns (bool) {
         require(!paused(), "ERC20Pausable: token transfer while paused");
        return _isExcluded[account];
    }

    function totalFees() public view returns (uint256) {
         
        return _tFeeTotal;
    }

    function deliver(uint256 tAmount) public {
         require(!paused(), "ERC20Pausable: token transfer while paused");
        address sender = _msgSender();
        require(!_isExcluded[sender], "Excluded addresses cannot call this function");
        (uint256 rAmount,,,,) = _getValues(tAmount);
        _rOwned[sender] = _rOwned[sender].sub(rAmount);
        _rTotal = _rTotal.sub(rAmount);
        _tFeeTotal = _tFeeTotal.add(tAmount);
    }

    function reflectionFromToken(uint256 tAmount, bool deductTransferFee) public view returns(uint256) {
         require(!paused(), "ERC20Pausable: token transfer while paused");
        require(tAmount <= _tTotal, "Amount must be less than supply");
        if (!deductTransferFee) {
            (uint256 rAmount,,,,) = _getValues(tAmount);
            return rAmount;
        } else {
            (,uint256 rTransferAmount,,,) = _getValues(tAmount);
            return rTransferAmount;
        }
    }

    function tokenFromReflection(uint256 rAmount) public view returns(uint256) {
         require(!paused(), "ERC20Pausable: token transfer while paused");
        require(rAmount <= _rTotal, "Amount must be less than total reflections");
        uint256 currentRate =  _getRate();
        return rAmount.div(currentRate);
    }
    

    function excludeFromReward(address account) public onlyOwner() {
     
        //uire(account != 0x05fF2B0DB69458A0750badebc4f9e13aDd608C7F, 'We can not exclude Pancake router.');
        require(!_isExcluded[account], "Account is already excluded");
        if(_rOwned[account] > 0) {
            _tOwned[account] = tokenFromReflection(_rOwned[account]);
        }
        _isExcluded[account] = true;
        _excluded.push(account);
    }
    

    function includeInReward(address account) external onlyOwner() {
       
        require(_isExcluded[account], "Account is already excluded");
        for (uint256 i = 0; i < _excluded.length; i++) {
            if (_excluded[i] == account) {
                _excluded[i] = _excluded[_excluded.length - 1];
                _tOwned[account] = 0;
                _isExcluded[account] = false;
                _excluded.pop();
                break;
            }
        }
    }

    function _transferBothExcluded(address sender, address recipient, uint256 tAmount) private {
         require(!paused(), "ERC20Pausable: token transfer while paused");
        (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount);
        _tOwned[sender] = _tOwned[sender].sub(tAmount);
        _rOwned[sender] = _rOwned[sender].sub(rAmount);
        _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
        _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);        
        _reflectFee(rFee, tFee);
        emit Transfer(sender, recipient, tTransferAmount);
    }
    
    receive() external payable {}

    function _reflectFee(uint256 rFee, uint256 tFee) private {
         require(!paused(), "ERC20Pausable: token transfer while paused");
        _rTotal = _rTotal.sub(rFee);
        _tFeeTotal = _tFeeTotal.add(tFee);
    }

    function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256) {
    
        (uint256 tTransferAmount, uint256 tFee) = _getTValues(tAmount);
        (uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, _getRate());
        return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee);
    }
    

    function _getTValues(uint256 tAmount) private view returns (uint256, uint256) {
        
        uint256 tFee = calculateTaxFee(tAmount);
        uint256 tTransferAmount = tAmount.sub(tFee);
        return (tTransferAmount, tFee);
    }


    function _getRValues(uint256 tAmount, uint256 tFee, uint256 currentRate) private pure returns (uint256, uint256, uint256) {
        
        uint256 rAmount = tAmount.mul(currentRate);
        uint256 rFee = tFee.mul(currentRate);
        uint256 rTransferAmount = rAmount.sub(rFee);
        return (rAmount, rTransferAmount, rFee);
    }

    function _getRate() private view returns(uint256) {
       
        (uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
        return rSupply.div(tSupply);
    }

    function _getCurrentSupply() private view returns(uint256, uint256) {
        uint256 rSupply = _rTotal;
        uint256 tSupply = _tTotal;      
        for (uint256 i = 0; i < _excluded.length; i++) {
            if (_rOwned[_excluded[i]] > rSupply || _tOwned[_excluded[i]] > tSupply) return (_rTotal, _tTotal);
            rSupply = rSupply.sub(_rOwned[_excluded[i]]);
            tSupply = tSupply.sub(_tOwned[_excluded[i]]);
        }
        if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
        return (rSupply, tSupply);
    }
    

    
    function calculateTaxFee(uint256 _amount) private view returns (uint256) {
        return _amount.mul(_taxFee).div(10**3);
    }


    
    function isExcludedFromFee(address account) public view returns(bool) {
        return _isExcludedFromFee[account];
    }

    function _approve(address owner, address spender, uint256 amount) private {
         require(!paused(), "ERC20Pausable: token transfer while paused");
        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);
    }

    function _transfer(
        address from,
        address to,
        uint256 amount
    ) private {
         require(!paused(), "ERC20Pausable: token transfer while paused");
        require(from != address(0), "ERC20: transfer from the zero address");
        require(to != address(0), "ERC20: transfer to the zero address");
        require(amount > 0, "Transfer amount must be greater than zero");
        _tokenTransfer(from,to,amount);
    }



    function _tokenTransfer(address sender, address recipient, uint256 amount) private {
         require(!paused(), "ERC20Pausable: token transfer while paused");
        if(_isExcludedFromFee[sender] || _isExcludedFromFee[recipient])
        {
            removeAllFee();
        }
        else
        {
            require(amount <= _maxTxAmount, "Transfer amount exceeds the maxTxAmount.");
        }
        
        uint256 marketingAmt = amount.mul(_marketingFee).div(1000);
        if (_isExcluded[sender] && !_isExcluded[recipient]) {
            _transferFromExcluded(sender, recipient, (amount.sub(marketingAmt)));
        } else if (!_isExcluded[sender] && _isExcluded[recipient]) {
            _transferToExcluded(sender, recipient, (amount.sub(marketingAmt)));
        } else if (!_isExcluded[sender] && !_isExcluded[recipient]) {
            _transferStandard(sender, recipient, (amount.sub(marketingAmt)));
        } else if (_isExcluded[sender] && _isExcluded[recipient]) {
            _transferBothExcluded(sender, recipient, (amount.sub(marketingAmt)));
        } else {
            _transferStandard(sender, recipient, (amount.sub(marketingAmt)));
        }
        
        removeAllFee();
        if(marketingAmt>0)
        {
            _transferStandard(sender, marketingWallet, marketingAmt);
        }
        restoreAllFee();
    }

    function _transferStandard(address sender, address recipient, uint256 tAmount) private {
         require(!paused(), "ERC20Pausable: token transfer while paused");
        (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount);
        _rOwned[sender] = _rOwned[sender].sub(rAmount);
        _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
        _reflectFee(rFee, tFee);
        emit Transfer(sender, recipient, tTransferAmount);
    }


    function _transferToExcluded(address sender, address recipient, uint256 tAmount) private {
         require(!paused(), "ERC20Pausable: token transfer while paused");
        (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount);
        _rOwned[sender] = _rOwned[sender].sub(rAmount);
        _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
        _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);           
        _reflectFee(rFee, tFee);
        emit Transfer(sender, recipient, tTransferAmount);
    }

    function _transferFromExcluded(address sender, address recipient, uint256 tAmount) private {
         require(!paused(), "ERC20Pausable: token transfer while paused");
        (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount);
        _tOwned[sender] = _tOwned[sender].sub(tAmount);
        _rOwned[sender] = _rOwned[sender].sub(rAmount);
        _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);   
        _reflectFee(rFee, tFee);
        emit Transfer(sender, recipient, tTransferAmount);
    }

    function excludeFromFee(address account) public onlyOwner {
         
        _isExcludedFromFee[account] = true;
    }
    
    function includeInFee(address account) public onlyOwner {
        
        _isExcludedFromFee[account] = false;
    }
    

    function setMarketingWallet(address newWallet) external onlyOwner() {
        
        marketingWallet = newWallet;
    }
   

    function setMaxTxPercent(uint256 maxTxPercent) external onlyOwner() {
        require(maxTxPercent > 10, "Cannot set transaction amount less than 10 percent!");
        _maxTxAmount = _tTotal.mul(maxTxPercent).div(10**2);
    }

    
    function burn(uint256 burnAmt) public virtual onlyOwner 
    
    {
       
        removeAllFee();
        _transferStandard(_msgSender(), address(0), burnAmt);
        restoreAllFee();
    }
    
    
}