// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;

//              .-'''-.                           
//             '   _    \         .---.           
//     .     /   /` '.   \        |   |           
//   .'|    .   |     \  '        |   |           
// .'  |    |   '      |  '       |   |            Coded by #nardo - Solidity 0.7.0
//<    |    \    \     / /  __    |   |    __           Koalas.Finance - Decentralized Finance
// |   | ____`.   ` ..' /.:--.'.  |   | .:--.'.   
// |   | \ .'   '-...-'`/ |   \ | |   |/ |   \ |  
// |   |/  .            `" __ | | |   |`" __ | |  
// |    /\  \            .'.''| | |   | .'.''| |  
// |   |  \  \          / /   | |_'---'/ /   | |_ SSSSSSSSSS
// '    \  \  \         \ \._,\ '/     \ \._,\ '/ 
//'------'  '---'        `--'  `"       `--'  `"  

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);
}
contract ERC20 is Context, IERC20 {
    using SafeMath for uint256;
    using Address for address;

    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}, 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 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;
    }

    /**
     * @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");

        _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
     *
     * - `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.
     *
     * 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 { }
}

library SafeERC20 {
    using SafeMath for uint256;
    using Address for address;

    function safeTransfer(IERC20 token, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IERC20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(IERC20 token, address spender, uint256 value) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        // solhint-disable-next-line max-line-length
        require((value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
    }

    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 newAllowance = token.allowance(address(this), spender).add(value);
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
        if (returndata.length > 0) { // Return data is optional
            // solhint-disable-next-line max-line-length
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}
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 Koala is ERC20 {

    using SafeERC20 for IERC20;
    using SafeMath for uint256;
    
    address private owner;
    address private KoalaAddress;
    address private KoalaAddressLP;
    
    IERC20 private KoalaToken;
    IERC20 private KoalaTokenLP;
    
    uint256 private varstakingRewards;
    uint256 private varstakingRewardsLP;
    uint256 private _totalKoalaStaked;
    uint256 private _totalKoalaStakedLP;
    uint256 private InitialSupply = 10000;
    uint256 private deflationaryBlockTimestamp;
    uint256 private deflationaryBlocks = 11520;
    uint256 private deflationaryMultiplier = 2;

    mapping(address => Staking) private _stakedBalances;
    mapping(address => Staking) private _stakedBalancesLP;

    struct Staking{
        uint256 lastBlockChecked;
        uint256 lastBlockCheckedLP;
        uint256 rewards;
        uint256 rewardsLP;
        uint256 koalastaked;
        uint256 koalastakedLP;
        uint256 stakedAtBlock;
        uint256 stakedAtBlockLP;
    }
    
    constructor() payable ERC20("Koalas.Finance", "KOALA") {
        owner = msg.sender;
        _mint(msg.sender, InitialSupply.mul(10 ** 18));
        varstakingRewards = 100000; varstakingRewardsLP = 100;
        deflationaryBlockTimestamp = block.number;
    }
    
    event Staked(address indexed user, uint256 amount, uint256 totalKoalaStaked);
    event StakedLP(address indexed user, uint256 amountLP, uint256 totalKoalaStakedLP);
    event Withdrawn(address indexed user, uint256 amount);
    event WithdrawnLP(address indexed user, uint256 amountLP);
    event Rewards(address indexed user, uint256 reward);
    event RewardsLP(address indexed user, uint256 rewardLP);
    
    modifier _onlyOwner() {require(msg.sender == owner);_;}

    modifier updateStakingReward(address account) {
        if(block.number > (deflationaryBlockTimestamp + deflationaryBlocks)){
            deflationaryBlockTimestamp = block.number;
            varstakingRewards = varstakingRewards * deflationaryMultiplier;
            varstakingRewardsLP = varstakingRewardsLP * deflationaryMultiplier;
        }
        if (block.number > _stakedBalances[account].lastBlockChecked) { uint256 rewardBlocks = block.number.sub(_stakedBalances[account].lastBlockChecked);
            if (_stakedBalances[account].koalastaked > 0) { _stakedBalances[account].rewards = _stakedBalances[account].rewards.add(_stakedBalances[account].koalastaked.mul(rewardBlocks)/varstakingRewards);}
            _stakedBalances[account].lastBlockChecked = block.number;
            emit Rewards(account, _stakedBalances[account].rewards);                                                     
        }_;
    }
    
    modifier updateStakingRewardLP(address account) {
        if (block.number > _stakedBalancesLP[account].lastBlockCheckedLP) { uint256 rewardBlocksLP = block.number.sub(_stakedBalancesLP[account].lastBlockCheckedLP);
            if (_stakedBalancesLP[account].koalastakedLP > 0) { _stakedBalancesLP[account].rewardsLP = _stakedBalancesLP[account].rewardsLP.add(_stakedBalancesLP[account].koalastakedLP.mul(rewardBlocksLP)/varstakingRewardsLP);}
            _stakedBalancesLP[account].lastBlockCheckedLP = block.number;
            emit RewardsLP(account, _stakedBalancesLP[account].rewardsLP);                                                     
        }_;
    }
    
    function setKoalaAddress(address _koalaaddress) public _onlyOwner returns(uint256) {KoalaAddress = _koalaaddress; KoalaToken = IERC20(_koalaaddress);}
    function setKoalaAddressLP(address _koalaaddressLP) public _onlyOwner returns(uint256) {KoalaAddressLP = _koalaaddressLP; KoalaTokenLP = IERC20(_koalaaddressLP);}
    function setRewardsVar(uint256 _amount) public _onlyOwner {varstakingRewards = _amount;}
    function setRewardsVarLP(uint256 _amount) public _onlyOwner {varstakingRewardsLP = _amount;}
    function setDeflationaryBlocks(uint256 _amount) public _onlyOwner {deflationaryBlocks = _amount;}
    function setDeflationaryMultiplier(uint256 _amount) public _onlyOwner {deflationaryMultiplier = _amount;}
    function getBlockNum() public view returns (uint256) {return block.number;}
    function getLastBlockCheckedNum(address _account) public view returns (uint256) {return _stakedBalances[_account].lastBlockChecked;}
    function getLastBlockCheckedNumLP(address _account) public view returns (uint256) {return _stakedBalancesLP[_account].lastBlockCheckedLP;}
    function getAddressStakeAmount(address _account) public view returns (uint256) {return _stakedBalances[_account].koalastaked;}
    function getAddressStakeAmountLP(address _account) public view returns (uint256) {return _stakedBalancesLP[_account].koalastakedLP;}
    function getStakedAtBlock(address _account) public view returns (uint256) {return _stakedBalances[_account].stakedAtBlock;}
    function getStakedAtBlockLP(address _account) public view returns (uint256) {return _stakedBalancesLP[_account].stakedAtBlockLP;}
    function getTotalStaked() public view returns (uint256) {return _totalKoalaStaked;}
    function getTotalStakedLP() public view returns (uint256) {return _totalKoalaStakedLP;}
    function getVarStakingReward() public view returns (uint256) {return varstakingRewards;}
    function getVarStakingRewardLP() public view returns (uint256) {return varstakingRewardsLP;}
    function getDeflationaryBlocks() public view returns (uint256) {return deflationaryBlocks;}
    function getDeflationaryCount() public view returns (uint256) {return deflationaryBlockTimestamp;}
    function getDeflationaryMultiplier() public view returns (uint256) {return deflationaryMultiplier;}

    function updatingStakingReward(address account) public returns(uint256) {
        if (block.number > _stakedBalances[account].lastBlockChecked) {uint256 rewardBlocks = block.number.sub(_stakedBalances[account].lastBlockChecked);
            if (_stakedBalances[account].koalastaked > 0) {_stakedBalances[account].rewards = _stakedBalances[account].rewards.add(_stakedBalances[account].koalastaked.mul(rewardBlocks)/ varstakingRewards);}
            _stakedBalances[account].lastBlockChecked = block.number;
            emit Rewards(account, _stakedBalances[account].rewards);} return(_stakedBalances[account].rewards);
    }
    
    function updatingStakingRewardLP(address account) public returns(uint256) {
        if (block.number > _stakedBalancesLP[account].lastBlockCheckedLP) {uint256 rewardBlocksLP = block.number.sub(_stakedBalancesLP[account].lastBlockCheckedLP);
            if (_stakedBalancesLP[account].koalastakedLP > 0) {_stakedBalancesLP[account].rewardsLP = _stakedBalancesLP[account].rewardsLP.add(_stakedBalancesLP[account].koalastakedLP.mul(rewardBlocksLP)/ varstakingRewardsLP);}
            _stakedBalancesLP[account].lastBlockCheckedLP = block.number;
            emit RewardsLP(account, _stakedBalancesLP[account].rewardsLP);} return(_stakedBalancesLP[account].rewardsLP);
    }

    function myRewardsBalance(address account) public view returns (uint256) {
        if (block.number > _stakedBalances[account].lastBlockChecked) {uint256 rewardBlocks = block.number.sub(_stakedBalances[account].lastBlockChecked);
            if (_stakedBalances[account].koalastaked > 0) {return _stakedBalances[account].rewards.add(_stakedBalances[account].koalastaked.mul(rewardBlocks)/ varstakingRewards);}}
    }
    
    function myRewardsBalanceLP(address account) public view returns (uint256) {
        if (block.number > _stakedBalancesLP[account].lastBlockCheckedLP) {uint256 rewardBlocksLP = block.number.sub(_stakedBalancesLP[account].lastBlockCheckedLP);
            if (_stakedBalancesLP[account].koalastakedLP > 0) {return _stakedBalancesLP[account].rewardsLP.add(_stakedBalancesLP[account].koalastakedLP.mul(rewardBlocksLP)/ varstakingRewardsLP);}}
    }
    
    function stake(uint256 amount) public updateStakingReward(msg.sender) {
        _totalKoalaStaked = _totalKoalaStaked.add(amount);
        _stakedBalances[msg.sender].koalastaked = _stakedBalances[msg.sender].koalastaked.add(amount);
        _stakedBalances[msg.sender].stakedAtBlock = block.number; 
        KoalaToken.safeTransferFrom(msg.sender, address(this), amount);
        emit Staked(msg.sender, amount, _totalKoalaStaked);
    }
    
    function stakeLP(uint256 amount) public updateStakingRewardLP(msg.sender) {
        _totalKoalaStakedLP = _totalKoalaStakedLP.add(amount);
        _stakedBalancesLP[msg.sender].koalastakedLP = _stakedBalancesLP[msg.sender].koalastakedLP.add(amount);
        _stakedBalancesLP[msg.sender].stakedAtBlockLP = block.number;
        KoalaTokenLP.safeTransferFrom(msg.sender, address(this), amount);
        emit StakedLP(msg.sender, amount, _totalKoalaStakedLP);
    }
    
    function withdraw(uint256 amount) public updateStakingReward(msg.sender) {
        _totalKoalaStaked = _totalKoalaStaked.sub(amount);
        _stakedBalances[msg.sender].koalastaked = _stakedBalances[msg.sender].koalastaked.sub(amount);
        KoalaToken.safeTransfer(msg.sender, amount);
        emit Withdrawn(msg.sender, amount);
    }
    
    function withdrawLP(uint256 amount) public updateStakingRewardLP(msg.sender) {
        _totalKoalaStakedLP = _totalKoalaStakedLP.sub(amount);
        _stakedBalancesLP[msg.sender].koalastakedLP = _stakedBalancesLP[msg.sender].koalastakedLP.sub(amount);
        KoalaTokenLP.safeTransfer(msg.sender, amount);
        emit WithdrawnLP(msg.sender, amount);
    }
    
    function getReward() public updateStakingReward(msg.sender) {
       uint256 reward = _stakedBalances[msg.sender].rewards;
       _stakedBalances[msg.sender].rewards = 0;
       _mint(msg.sender, reward);
       emit Rewards(msg.sender, reward);
   }
   
    function getRewardLP() public updateStakingRewardLP(msg.sender) {
       uint256 rewardLP = _stakedBalancesLP[msg.sender].rewardsLP;
       _stakedBalancesLP[msg.sender].rewardsLP = 0;
       _mint(msg.sender, rewardLP);
       emit RewardsLP(msg.sender, rewardLP);
   }
}