/*
   ____            __   __        __   _
  / __/__ __ ___  / /_ / /  ___  / /_ (_)__ __
 _\ \ / // // _ \/ __// _ \/ -_)/ __// / \ \ /
/___/ \_, //_//_/\__//_//_/\__/ \__//_/ /_\_\
     /___/

* Synthetix: DONDIRewards.sol
*
* Docs: https://docs.synthetix.io/
*
*
* MIT License
* ===========
*
* Copyright (c) 2020 Synthetix
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
*/

// File: @openzeppelin/contracts/math/Math.sol

pragma solidity ^0.5.0;

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library Math {
    /**
     * @dev Returns the largest of two numbers.
     */
    function max(uint256 a, uint256 b) internal pure returns (uint256) {
        return a >= b ? a : b;
    }

    /**
     * @dev Returns the smallest of two numbers.
     */
    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        return a < b ? a : b;
    }

    /**
     * @dev Returns the average of two numbers. The result is rounded towards
     * zero.
     */
    function average(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b) / 2 can overflow, so we distribute
        return (a / 2) + (b / 2) + ((a % 2 + b % 2) / 2);
    }
}

// File: @openzeppelin/contracts/math/SafeMath.sol

/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
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.
     *
     * _Available since v2.4.0._
     */
    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.
     *
     * _Available since v2.4.0._
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        // Solidity only automatically asserts when dividing by 0
        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.
     *
     * _Available since v2.4.0._
     */
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }
}

// File: @openzeppelin/contracts/GSN/Context.sol

/*
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with GSN meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
contract Context {
    // Empty internal constructor, to prevent people from mistakenly deploying
    // an instance of this contract, which should be used via inheritance.
    constructor () internal { }
    // solhint-disable-previous-line no-empty-blocks

    function _msgSender() internal view returns (address payable) {
        return msg.sender;
    }

    function _msgData() internal view returns (bytes memory) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}

// File: @openzeppelin/contracts/ownership/Ownable.sol

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
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 {
        _owner = _msgSender();
        emit OwnershipTransferred(address(0), _owner);
    }

    /**
     * @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(isOwner(), "Ownable: caller is not the owner");
        _;
    }

    /**
     * @dev Returns true if the caller is the current owner.
     */
    function isOwner() public view returns (bool) {
        return _msgSender() == _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 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 onlyOwner {
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     */
    function _transferOwnership(address newOwner) internal {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}

// File: @openzeppelin/contracts/token/ERC20/IERC20.sol

/**
 * @dev Interface of the ERC20 standard as defined in the EIP. Does not include
 * the optional functions; to access them see {ERC20Detailed}.
 */
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);
    function mint(address account, uint amount) external;
    /**
     * @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);
}

// File: @openzeppelin/contracts/utils/Address.sol

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * This test is non-exhaustive, and there may be false-negatives: during the
     * execution of a contract's constructor, its address will be reported as
     * not containing 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.
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies in extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

        // 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 != 0x0 && codehash != accountHash);
    }

    /**
     * @dev Converts an `address` into `address payable`. Note that this is
     * simply a type cast: the actual underlying value is not changed.
     *
     * _Available since v2.4.0._
     */
    function toPayable(address account) internal pure returns (address payable) {
        return address(uint160(account));
    }

    /**
     * @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].
     *
     * _Available since v2.4.0._
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

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

// File: @openzeppelin/contracts/token/ERC20/SafeERC20.sol

/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for ERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
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));
    }

    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.

        // A Solidity high level call has three parts:
        //  1. The target address is checked to verify it contains contract code
        //  2. The call itself is made, and success asserted
        //  3. The return value is decoded, which in turn checks the size of the returned data.
        // solhint-disable-next-line max-line-length
        require(address(token).isContract(), "SafeERC20: call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = address(token).call(data);
        require(success, "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");
        }
    }
}

// File: contracts/IRewardDistributionRecipient.sol

contract IRewardDistributionRecipient is Ownable {
    address public rewardDistribution;

    function notifyRewardAmount(uint256 reward) external;

    modifier onlyRewardDistribution() {
        require(_msgSender() == rewardDistribution, "Caller is not reward distribution");
        _;
    }

    function setRewardDistribution(address _rewardDistribution)
        external
        onlyOwner
    {
        rewardDistribution = _rewardDistribution;
    }
}

// File: contracts/CurveRewards.sol

interface DONDI {
    function dondisScalingFactor() external returns (uint256);
    function mint(address to, uint256 amount) external;
}

interface DONDIAirdrop {
    function airdrop(uint256 value) external;
    function airdropAll() external;
    function getRemainAirdrop(address pool) external view returns (uint256);
}

contract LPTokenWrapper {
    using SafeMath for uint256;
    using SafeERC20 for IERC20;

    IERC20 public yfi_eth_uni_lp = IERC20(0x2fDbAdf3C4D5A8666Bc06645B8358ab803996E28);

    uint256 private _totalSupply;
    mapping(address => uint256) private _balances;

    function totalSupply() public view returns (uint256) {
        return _totalSupply;
    }

    function balanceOf(address account) public view returns (uint256) {
        return _balances[account];
    }

    function stake(uint256 amount) public {
        _totalSupply = _totalSupply.add(amount);
        _balances[msg.sender] = _balances[msg.sender].add(amount);
        yfi_eth_uni_lp.safeTransferFrom(msg.sender, address(this), amount);
    }

    function withdraw(uint256 amount) public {
        _totalSupply = _totalSupply.sub(amount);
        _balances[msg.sender] = _balances[msg.sender].sub(amount);
        yfi_eth_uni_lp.safeTransfer(msg.sender, amount);
    }
}

contract DONDIYFIETHPool is LPTokenWrapper, IRewardDistributionRecipient {
    // new
    struct MyAction {	
        mapping(uint32 => uint256) amount;	
        mapping(uint32 => uint256) time;	
        uint32 length;	
    }

    IERC20 public dondi = IERC20(0x45Ed25A237B6AB95cE69aF7555CF8D7A2FfEE67c);       // need to update address
    DONDIAirdrop public airdrop = DONDIAirdrop(0xbd1A31ac12Cd16bacE58519c91a4562069d5A6A6);        // need to update address

    uint256 public constant DURATION = 5184000; // 60 days	
    uint256 public initreward = 625 * 10 ** 3 * 10**18; // 625K

    uint256 public starttime = 1604102400; // 2020-10-31 12:00:00 AM (UTC UTC +00:00)
    uint256 public periodFinish = 0;
    uint256 public rewardRate = 0;
    uint256 public lastUpdateTime;
    uint256 public rewardPerTokenStored;

    // new
    mapping(address => MyAction) private stakes;	
    mapping(address => MyAction) private withdraws;	
    mapping(address => MyAction) private boosts;

    mapping(address => uint256) public boostStarttime;
    mapping(address => uint8) public currentBoost;
    mapping(address => uint8) public x2Count;
    mapping(address => uint8) public x4Count;
    mapping(address => uint8) public x8Count;
    mapping(address => uint8) public x10Count;

    mapping(address => uint256) public userRewardPerTokenPaid;
    mapping(address => uint256) public rewards;

    event RewardAdded(uint256 reward);
    event Staked(address indexed user, uint256 amount);
    event Withdrawn(address indexed user, uint256 amount);
    event RewardPaid(address indexed user, uint256 reward);

    modifier checkBoostStatus() {
        require(block.timestamp >= boostStarttime[msg.sender] + 1 hours, "already boost");
        _;
    }

    modifier checkStart() {
        require(block.timestamp >= starttime,"not start");
        _;
    }

    modifier checkhalve() {	
        if (block.timestamp >= periodFinish) {	
            initreward = initreward.mul(50).div(100);	
            uint256 scalingFactor = DONDI(address(dondi)).dondisScalingFactor();	
            uint256 newRewards = initreward.mul(scalingFactor).div(10**18);	
            dondi.mint(address(this), newRewards);	
            rewardRate = initreward.div(DURATION);	
            periodFinish = block.timestamp.add(DURATION);	
            emit RewardAdded(initreward);	
        }	
        _;	
    }

    modifier updateReward(address account) {
        rewardPerTokenStored = rewardPerToken();
        lastUpdateTime = lastTimeRewardApplicable();
        if (account != address(0)) {
            rewards[account] = earned(account);
            userRewardPerTokenPaid[account] = rewardPerTokenStored;
        }
        _;
    }

    function lastTimeRewardApplicable() public view returns (uint256) {
        return Math.min(block.timestamp, periodFinish);
    }

    function rewardPerToken() public view returns (uint256) {
        if (totalSupply() == 0) {
            return rewardPerTokenStored;
        }
        return
            rewardPerTokenStored.add(
                lastTimeRewardApplicable()
                    .sub(lastUpdateTime)
                    .mul(rewardRate)
                    .mul(1e18)
                    .div(totalSupply())
            );
    }

    function earned(address account) public view returns (uint256) {
        return
            balanceOf(account)
                .mul(rewardPerToken().sub(userRewardPerTokenPaid[account]))
                .div(1e18)
                .add(rewards[account]);
    }

    // stake visibility is public as overriding LPTokenWrapper's stake() function
    function stake(uint256 amount) public updateReward(msg.sender) checkhalve checkStart {
        require(amount > 0, "Cannot stake 0");
        super.stake(amount);

        // new
        stakes[msg.sender].amount[stakes[msg.sender].length] = amount;	
        stakes[msg.sender].time[stakes[msg.sender].length] = now;	
        stakes[msg.sender].length++;

        emit Staked(msg.sender, amount);
    }

    function withdraw(uint256 amount) public updateReward(msg.sender) checkStart {
        require(amount > 0, "Cannot withdraw 0");
        super.withdraw(amount);

        // new
        withdraws[msg.sender].amount[withdraws[msg.sender].length] = amount;	
        withdraws[msg.sender].time[withdraws[msg.sender].length] = now;	
        withdraws[msg.sender].length++;

        emit Withdrawn(msg.sender, amount);
    }

    function exit() external {
        withdraw(balanceOf(msg.sender));
        getReward();
    }

    // new
    function getBoostReward(uint256 trueReward) private view returns(uint256){	
        uint256 additionTime = 0;	
        uint256 startTime = stakes[msg.sender].time[0];	
        uint256 boostReward = 0;	
        uint256 fullAmount = 0;	
        uint32 i;	
        uint32 j;	
        for (i = 0; i < stakes[msg.sender].length; i++) {	
            additionTime = 0;	
            uint256 stakeTime = stakes[msg.sender].time[i];	
            for (j = 0; j < boosts[msg.sender].length; j++) {	
                uint256 boostTime = boosts[msg.sender].time[j];	
                uint256 boostAmount = boosts[msg.sender].amount[j];	
                if (boostTime < stakeTime && boostTime + 1 hours < stakeTime) {	
                    if (boostTime.add(1 hours) > now) {	
                        additionTime = additionTime.add(uint256(uint256(now).sub(stakeTime)).mul(boostAmount - 1));	
                    } else {	
                        additionTime = additionTime.add(uint256(boostTime.add(1 hours).sub(stakeTime)).mul(boostAmount - 1));	
                    }	
                } else if (boostTime > stakeTime) {	
                    if (boostTime.add(1 hours) > now) {	
                        additionTime = additionTime.add(uint256(uint256(now).sub(boostTime)).mul(boostAmount - 1));	
                    } else {	
                        additionTime = additionTime.add(uint256(1 hours).mul(boostAmount - 1));	
                    }	
                }	
            }	
            if (balanceOf(msg.sender) > 0) {	
                fullAmount = balanceOf(msg.sender);	
            } else {	
                fullAmount = withdraws[msg.sender].amount[withdraws[msg.sender].length - 1];	
            }	
            uint256 addReward = trueReward.mul(stakes[msg.sender].amount[i]).div(fullAmount);	
            addReward = addReward.mul(additionTime).div(uint256(now).sub(startTime));	
            boostReward = boostReward.add(addReward);	
        }	
        if (withdraws[msg.sender].length > 0) {	
            for (i = 0; i < withdraws[msg.sender].length; i++) {	
                additionTime = 0;	
                uint256 withdrawTime = withdraws[msg.sender].time[i];	
                for (j = 0; j < boosts[msg.sender].length; j++) {	
                    uint256 boostTime = boosts[msg.sender].time[j];	
                    uint256 boostAmount = boosts[msg.sender].amount[j];	
                    if (boostTime < withdrawTime && boostTime + 1 hours < withdrawTime) {	
                        if (boostTime.add(1 hours) > now) {	
                            additionTime = additionTime.add(uint256(uint256(now).sub(withdrawTime)).mul(boostAmount - 1));	
                        } else {	
                            additionTime = additionTime.add(uint256(boostTime.add(1 hours).sub(withdrawTime)).mul(boostAmount - 1));	
                        }	
                    } else if (boostTime > withdrawTime) {	
                        if (boostTime.add(1 hours) > now) {	
                            additionTime = additionTime.add(uint256(uint256(now).sub(boostTime)).mul(boostAmount - 1));	
                        } else {	
                            additionTime = additionTime.add(uint256(1 hours).mul(boostAmount - 1));	
                        }	
                    }	
                }	
                if (balanceOf(msg.sender) > 0) {	
                    fullAmount = balanceOf(msg.sender);	
                } else {	
                    fullAmount = withdraws[msg.sender].amount[withdraws[msg.sender].length - 1];	
                }	
                uint256 subReward = trueReward.mul(withdraws[msg.sender].amount[i]).div(fullAmount);	
                subReward = subReward.mul(additionTime).div(uint256(now).sub(startTime));	
                boostReward = boostReward.sub(subReward);	
            }	
        }	
        return boostReward;	
    }

    // new
    function getReward() public updateReward(msg.sender) checkhalve checkStart {	
        uint256 reward = earned(msg.sender);	
        if (reward > 0) {	
            rewards[msg.sender] = 0;	
            uint256 scalingFactor = DONDI(address(dondi)).dondisScalingFactor();	
            uint256 trueReward = reward.mul(scalingFactor).div(10**18);	
            uint256 remainAirdrop = airdrop.getRemainAirdrop(address(this));	
            if (block.timestamp < boostStarttime[msg.sender] + 1 hours && remainAirdrop > 0) {	
                	
                uint256 boostReward = getBoostReward(trueReward);	
                if (boostReward < remainAirdrop) {	
                    airdrop.airdrop(boostReward);	
                    dondi.safeTransfer(msg.sender, trueReward.add(boostReward));	
                    emit RewardPaid(msg.sender, trueReward.add(boostReward));	
                }	
                else {	
                    airdrop.airdropAll();	
                    dondi.safeTransfer(msg.sender, trueReward.add(remainAirdrop));	
                    emit RewardPaid(msg.sender, trueReward.add(remainAirdrop));	
                }	
            }	
            else {	
                dondi.safeTransfer(msg.sender, trueReward);	
                emit RewardPaid(msg.sender, trueReward);	
            }	
            stakes[msg.sender].amount[0] = balanceOf(msg.sender);	
            stakes[msg.sender].time[0] = now;	
            stakes[msg.sender].length = 1;	
            withdraws[msg.sender].length = 0;	
        }	
    }

    function notifyRewardAmount(uint256 reward)	
        external	
        onlyRewardDistribution	
        updateReward(address(0))	
    {	
        if (block.timestamp > starttime) {	
          if (block.timestamp >= periodFinish) {	
              rewardRate = reward.div(DURATION);	
          } else {	
              uint256 remaining = periodFinish.sub(block.timestamp);	
              uint256 leftover = remaining.mul(rewardRate);	
              rewardRate = reward.add(leftover).div(DURATION);	
          }	
          lastUpdateTime = block.timestamp;	
          periodFinish = block.timestamp.add(DURATION);	
          emit RewardAdded(reward);	
        } else {	
          require(dondi.balanceOf(address(this)) == 0, "already initialized");	
          dondi.mint(address(this), initreward);	
          rewardRate = initreward.div(DURATION);	
          lastUpdateTime = starttime;	
          periodFinish = starttime.add(DURATION);	
          emit RewardAdded(reward);	
        }	
    }

    function boostx2() external payable checkBoostStatus checkStart {
        address payable fundaddress = 0x1912780CA1056fB9B5f3B4C241881f69Ed225861;
        uint256 boostCost = uint256(15).mul(uint256(2) ** x2Count[msg.sender]).mul(10 ** 18).div(1000);
        require(msg.value == boostCost, "Wrong cost");

        currentBoost[msg.sender] = 2;
        x2Count[msg.sender] = x2Count[msg.sender] + 1;
        boostStarttime[msg.sender] = block.timestamp;

        // new
        boosts[msg.sender].amount[boosts[msg.sender].length] = 2;	
        boosts[msg.sender].time[boosts[msg.sender].length] = now;	
        boosts[msg.sender].length++;

        if (!fundaddress.send(boostCost)) {
            return fundaddress.transfer(address(this).balance);
        }
    }

    function boostx4() external payable checkBoostStatus checkStart {
        address payable fundaddress = 0x1912780CA1056fB9B5f3B4C241881f69Ed225861;
        uint256 boostCost = uint256(15).mul(uint256(2) ** x4Count[msg.sender]).mul(10 ** 18).div(1000);
        require(msg.value == boostCost, "Wrong cost");

        currentBoost[msg.sender] = 4;
        x4Count[msg.sender] = x4Count[msg.sender] + 1;
        boostStarttime[msg.sender] = block.timestamp;

        // new
        boosts[msg.sender].amount[boosts[msg.sender].length] = 4;	
        boosts[msg.sender].time[boosts[msg.sender].length] = now;	
        boosts[msg.sender].length++;

        if (!fundaddress.send(boostCost)) {
            return fundaddress.transfer(address(this).balance);
        }
    }
    
    function boostx8() external payable checkBoostStatus checkStart {
        address payable fundaddress = 0x1912780CA1056fB9B5f3B4C241881f69Ed225861;
        uint256 boostCost = uint256(15).mul(uint256(2) ** x8Count[msg.sender]).mul(10 ** 18).div(1000);
        require(msg.value == boostCost, "Wrong cost");

        currentBoost[msg.sender] = 8;
        x8Count[msg.sender] = x8Count[msg.sender] + 1;
        boostStarttime[msg.sender] = block.timestamp;

        // new
        boosts[msg.sender].amount[boosts[msg.sender].length] = 8;	
        boosts[msg.sender].time[boosts[msg.sender].length] = now;	
        boosts[msg.sender].length++;

        if (!fundaddress.send(boostCost)) {
            return fundaddress.transfer(address(this).balance);
        }
    }
    
    function boostx10() external payable checkBoostStatus checkStart {
        address payable fundaddress = 0x1912780CA1056fB9B5f3B4C241881f69Ed225861;
        uint256 boostCost = uint256(15).mul(uint256(2) ** x10Count[msg.sender]).mul(10 ** 18).div(1000);
        require(msg.value == boostCost, "Wrong cost");

        currentBoost[msg.sender] = 10;
        x10Count[msg.sender] = x10Count[msg.sender] + 1;
        boostStarttime[msg.sender] = block.timestamp;

        // new
        boosts[msg.sender].amount[boosts[msg.sender].length] = 10;	
        boosts[msg.sender].time[boosts[msg.sender].length] = now;	
        boosts[msg.sender].length++;

        if (!fundaddress.send(boostCost)) {
            return fundaddress.transfer(address(this).balance);
        }
    }
}

{
  "compilationTarget": {
    "DONDIYFIETHPool.sol": "DONDIYFIETHPool"
  },
  "evmVersion": "istanbul",
  "libraries": {},
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "remappings": []
}