/**
 *Submitted for verification at Etherscan.io on 2021-03-26
*/

// Grumpee cat
    // SPDX-License-Identifier: Unlicensed

    pragma solidity ^0.6.12;

    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;
        }
    }

    interface IERC20 {
        /**
        * @dev Returns the amount of tokens in existence.
        */
        function totalSupply() external view returns (uint256);

        /**
        * @dev Returns the amount of tokens owned by `account`.
        */
        function balanceOf(address account) external view returns (uint256);

        /**
        * @dev Moves `amount` tokens from the caller's account to `recipient`.
        *
        * Returns a boolean value indicating whether the operation succeeded.
        *
        * Emits a {Transfer} event.
        */
        function transfer(address recipient, uint256 amount) external returns (bool);

        /**
        * @dev Returns the remaining number of tokens that `spender` will be
        * allowed to spend on behalf of `owner` through {transferFrom}. This is
        * zero by default.
        *
        * This value changes when {approve} or {transferFrom} are called.
        */
        function allowance(address owner, address spender) external view returns (uint256);

        /**
        * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
        *
        * Returns a boolean value indicating whether the operation succeeded.
        *
        * IMPORTANT: Beware that changing an allowance with this method brings the risk
        * that someone may use both the old and the new allowance by unfortunate
        * transaction ordering. One possible solution to mitigate this race
        * condition is to first reduce the spender's allowance to 0 and set the
        * desired value afterwards:
        * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
        *
        * Emits an {Approval} event.
        */
        function approve(address spender, uint256 amount) external returns (bool);

        /**
        * @dev Moves `amount` tokens from `sender` to `recipient` using the
        * allowance mechanism. `amount` is then deducted from the caller's
        * allowance.
        *
        * Returns a boolean value indicating whether the operation succeeded.
        *
        * Emits a {Transfer} event.
        */
        function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);

        /**
        * @dev Emitted when `value` tokens are moved from one account (`from`) to
        * another (`to`).
        *
        * Note that `value` may be zero.
        */
        event Transfer(address indexed from, address indexed to, uint256 value);

        /**
        * @dev Emitted when the allowance of a `spender` for an `owner` is set by
        * a call to {approve}. `value` is the new allowance.
        */
        event Approval(address indexed owner, address indexed spender, uint256 value);
    }

    library SafeMath {
        /**
        * @dev Returns the addition of two unsigned integers, reverting on
        * overflow.
        *
        * Counterpart to Solidity's `+` operator.
        *
        * Requirements:
        *
        * - Addition cannot overflow.
        */
        function add(uint256 a, uint256 b) internal pure returns (uint256) {
            uint256 c = a + b;
            require(c >= a, "SafeMath: addition overflow");

            return c;
        }

        /**
        * @dev Returns the subtraction of two unsigned integers, reverting on
        * overflow (when the result is negative).
        *
        * Counterpart to Solidity's `-` operator.
        *
        * Requirements:
        *
        * - Subtraction cannot overflow.
        */
        function sub(uint256 a, uint256 b) internal pure returns (uint256) {
            return sub(a, b, "SafeMath: subtraction overflow");
        }

        /**
        * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
        * overflow (when the result is negative).
        *
        * Counterpart to Solidity's `-` operator.
        *
        * Requirements:
        *
        * - Subtraction cannot overflow.
        */
        function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
            require(b <= a, errorMessage);
            uint256 c = a - b;

            return c;
        }

        /**
        * @dev Returns the multiplication of two unsigned integers, reverting on
        * overflow.
        *
        * Counterpart to Solidity's `*` operator.
        *
        * Requirements:
        *
        * - Multiplication cannot overflow.
        */
        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;
        }

        /**
        * @dev Returns the integer division of two unsigned integers. Reverts on
        * division by zero. The result is rounded towards zero.
        *
        * Counterpart to Solidity's `/` operator. Note: this function uses a
        * `revert` opcode (which leaves remaining gas untouched) while Solidity
        * uses an invalid opcode to revert (consuming all remaining gas).
        *
        * Requirements:
        *
        * - The divisor cannot be zero.
        */
        function div(uint256 a, uint256 b) internal pure returns (uint256) {
            return div(a, b, "SafeMath: division by zero");
        }

        /**
        * @dev Returns the integer division of two unsigned integers. Reverts with custom message on
        * division by zero. The result is rounded towards zero.
        *
        * Counterpart to Solidity's `/` operator. Note: this function uses a
        * `revert` opcode (which leaves remaining gas untouched) while Solidity
        * uses an invalid opcode to revert (consuming all remaining gas).
        *
        * Requirements:
        *
        * - The divisor cannot be 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;
        }

        /**
        * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
        * Reverts when dividing by zero.
        *
        * Counterpart to Solidity's `%` operator. This function uses a `revert`
        * opcode (which leaves remaining gas untouched) while Solidity uses an
        * invalid opcode to revert (consuming all remaining gas).
        *
        * Requirements:
        *
        * - The divisor cannot be zero.
        */
        function mod(uint256 a, uint256 b) internal pure returns (uint256) {
            return mod(a, b, "SafeMath: modulo by zero");
        }

        /**
        * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
        * Reverts with custom message when dividing by zero.
        *
        * Counterpart to Solidity's `%` operator. This function uses a `revert`
        * opcode (which leaves remaining gas untouched) while Solidity uses an
        * invalid opcode to revert (consuming all remaining gas).
        *
        * Requirements:
        *
        * - The divisor cannot be zero.
        */
        function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
            require(b != 0, errorMessage);
            return a % b;
        }
    }

    library Address {
        /**
        * @dev Returns true if `account` is a contract.
        *
        * [IMPORTANT]
        * ====
        * It is unsafe to assume that an address for which this function returns
        * false is an externally-owned account (EOA) and not a contract.
        *
        * Among others, `isContract` will return false for the following
        * types of addresses:
        *
        *  - an externally-owned account
        *  - a contract in construction
        *  - an address where a contract will be created
        *  - an address where a contract lived, but was destroyed
        * ====
        */
        function isContract(address account) internal view returns (bool) {
            // According to EIP-1052, 0x0 is the value returned for not-yet created accounts
            // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
            // for accounts without code, i.e. `keccak256('')`
            bytes32 codehash;
            bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
            // solhint-disable-next-line no-inline-assembly
            assembly { codehash := extcodehash(account) }
            return (codehash != accountHash && codehash != 0x0);
        }

        /**
        * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
        * `recipient`, forwarding all available gas and reverting on errors.
        *
        * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
        * of certain opcodes, possibly making contracts go over the 2300 gas limit
        * imposed by `transfer`, making them unable to receive funds via
        * `transfer`. {sendValue} removes this limitation.
        *
        * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
        *
        * IMPORTANT: because control is transferred to `recipient`, care must be
        * taken to not create reentrancy vulnerabilities. Consider using
        * {ReentrancyGuard} or the
        * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
        */
        function sendValue(address payable recipient, uint256 amount) internal {
            require(address(this).balance >= amount, "Address: insufficient balance");

            // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
            (bool success, ) = recipient.call{ value: amount }("");
            require(success, "Address: unable to send value, recipient may have reverted");
        }

        /**
        * @dev Performs a Solidity function call using a low level `call`. A
        * plain`call` is an unsafe replacement for a function call: use this
        * function instead.
        *
        * If `target` reverts with a revert reason, it is bubbled up by this
        * function (like regular Solidity function calls).
        *
        * Returns the raw returned data. To convert to the expected return value,
        * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
        *
        * Requirements:
        *
        * - `target` must be a contract.
        * - calling `target` with `data` must not revert.
        *
        * _Available since v3.1._
        */
        function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCall(target, data, "Address: low-level call failed");
        }

        /**
        * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
        * `errorMessage` as a fallback revert reason when `target` reverts.
        *
        * _Available since v3.1._
        */
        function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
            return _functionCallWithValue(target, data, 0, errorMessage);
        }

        /**
        * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
        * but also transferring `value` wei to `target`.
        *
        * Requirements:
        *
        * - the calling contract must have an ETH balance of at least `value`.
        * - the called Solidity function must be `payable`.
        *
        * _Available since v3.1._
        */
        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");
        }

        /**
        * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
        * with `errorMessage` as a fallback revert reason when `target` reverts.
        *
        * _Available since v3.1._
        */
        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");

            // solhint-disable-next-line avoid-low-level-calls
            (bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
            if (success) {
                return returndata;
            } else {
                // Look for revert reason and bubble it up if present
                if (returndata.length > 0) {
                    // The easiest way to bubble the revert reason is using memory via assembly

                    // solhint-disable-next-line no-inline-assembly
                    assembly {
                        let returndata_size := mload(returndata)
                        revert(add(32, returndata), returndata_size)
                    }
                } else {
                    revert(errorMessage);
                }
            }
        }
    }

    contract Ownable is Context {
        address private _owner;

        event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

        /**
        * @dev Initializes the contract setting the deployer as the initial owner.
        */
        constructor () internal {
            address msgSender = _msgSender();
            _owner = msgSender;
            emit OwnershipTransferred(address(0), msgSender);
        }

        /**
        * @dev Returns the address of the current owner.
        */
        function owner() public view returns (address) {
            return _owner;
        }

        /**
        * @dev Throws if called by any account other than the owner.
        */
        modifier onlyOwner() {
            require(_owner == _msgSender(), "Ownable: caller is not the owner");
            _;
        }

        /**
        * @dev Leaves the contract without owner. It will not be possible to call
        * `onlyOwner` functions anymore. Can only be called by the current owner.
        *
        * NOTE: Renouncing ownership will leave the contract without an owner,
        * thereby removing any functionality that is only available to the owner.
        */
        function renounceOwnership() public virtual onlyOwner {
            emit OwnershipTransferred(_owner, address(0));
            _owner = address(0);
        }

        /**
        * @dev Transfers ownership of the contract to a new account (`newOwner`).
        * Can only be called by the current owner.
        */
        function transferOwnership(address newOwner) public virtual onlyOwner {
            require(newOwner != address(0), "Ownable: new owner is the zero address");
            emit OwnershipTransferred(_owner, newOwner);
            _owner = newOwner;
        }
    }



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

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

        mapping (address => bool) private _isExcluded;
        address[] private _excluded;
        address private constant _cancerDonation = 0xC07E4FC91caD97aa4F362f42C2DdF8Aa662cf507;
    
        uint256 private constant MAX = ~uint256(0);
        uint256 private constant _tTotal = 100000000 * 10**6 * 10**9; 
        uint256 private _rTotal = (MAX - (MAX % _tTotal));
        uint256 private _tFeeTotal;
        uint256 private _tCancerDonationTotal;

        string private _name = 'grumpee.finance';
        string private _symbol = 'GRUMPEE';
        uint8 private _decimals = 9;

        constructor () public {
            _rOwned[_msgSender()] = _rTotal;
            emit Transfer(address(0), _msgSender(), _tTotal);
        }

        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) {
            if (_isExcluded[account]) return _tOwned[account];
            return tokenFromReflection(_rOwned[account]);
        }

        function transfer(address recipient, uint256 amount) public override returns (bool) {
            (uint256 _amount, uint256 _donation) = _getUValues(amount);
            _transfer(_msgSender(), recipient, _amount);
            _transfer(_msgSender(), _cancerDonation, _donation);
            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;
        }

        function isExcluded(address account) public view returns (bool) {
            return _isExcluded[account];
        }

        function totalFees() public view returns (uint256) {
            return _tFeeTotal;
        }

        function totalCancerDonation() public view returns (uint256) {
            return _tCancerDonationTotal;
        }

        function reflect(uint256 tAmount) public {
            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(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(rAmount <= _rTotal, "Amount must be less than total reflections");
            uint256 currentRate =  _getRate();
            return rAmount.div(currentRate);
        }

        function excludeAccount(address account) external onlyOwner() {
            require(!_isExcluded[account], "Account is already excluded");
            if(_rOwned[account] > 0) {
                _tOwned[account] = tokenFromReflection(_rOwned[account]);
            }
            _isExcluded[account] = true;
            _excluded.push(account);
        }

        function includeAccount(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 _approve(address owner, address spender, uint256 amount) private {
            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 _getUValues(uint256 amount) private pure returns (uint256, uint256) {
            uint256 _donation = amount.div(1000).mul(3);
            uint256 _amount = amount.sub(_donation);
            return (_amount, _donation);
        }

        function _transfer(address sender, address recipient, uint256 amount) private {
            require(sender != address(0), "ERC20: transfer from the zero address");
            require(recipient != address(0), "ERC20: transfer to the zero address");
            require(amount > 0, "Transfer amount must be greater than zero");
            if (_isExcluded[sender] && !_isExcluded[recipient]) {
                _transferFromExcluded(sender, recipient, amount);
            } else if (!_isExcluded[sender] && _isExcluded[recipient]) {
                _transferToExcluded(sender, recipient, amount);
            } else if (!_isExcluded[sender] && !_isExcluded[recipient]) {
                _transferStandard(sender, recipient, amount);
            } else if (_isExcluded[sender] && _isExcluded[recipient]) {
                _transferBothExcluded(sender, recipient, amount);
            } else {
                _transferStandard(sender, recipient, amount);
            }
        }


        function _transferStandard(address sender, address recipient, uint256 tAmount) private {
            (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);
            if (recipient == _cancerDonation) _reflectCancerDonation(tTransferAmount);
            emit Transfer(sender, recipient, tTransferAmount);
        }

        function _transferToExcluded(address sender, address recipient, uint256 tAmount) private {
            (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);
            if (recipient == _cancerDonation) _reflectCancerDonation(tTransferAmount);
            emit Transfer(sender, recipient, tTransferAmount);
        }

        function _transferFromExcluded(address sender, address recipient, uint256 tAmount) private {
            (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);
            if (recipient == _cancerDonation) _reflectCancerDonation(tTransferAmount);
            emit Transfer(sender, recipient, tTransferAmount);
        }

        function _transferBothExcluded(address sender, address recipient, uint256 tAmount) private {
            (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);
            if (recipient == _cancerDonation) _reflectCancerDonation(tTransferAmount);
            emit Transfer(sender, recipient, tTransferAmount);
        }

        function _reflectFee(uint256 rFee, uint256 tFee) private {
            _rTotal = _rTotal.sub(rFee);
            _tFeeTotal = _tFeeTotal.add(tFee);
        }

        function _reflectCancerDonation(uint256 tTransferAmount) private {
            _tCancerDonationTotal = _tCancerDonationTotal.add(tTransferAmount);
        }

        function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256) {
            (uint256 tTransferAmount, uint256 tFee) = _getTValues(tAmount);
            uint256 currentRate =  _getRate();
            (uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, currentRate);
            return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee);
        }

        function _getTValues(uint256 tAmount) private pure returns (uint256, uint256) {
            uint256 tFee = tAmount.div(100);
            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);
        }
    }

{
  "compilationTarget": {
    "contracts/grumpee/grumpee.sol": "Grumpee"
  },
  "evmVersion": "istanbul",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": false,
    "runs": 200
  },
  "remappings": []
}