Contract Source Code:
File 1 of 1 : MasterChef
// File: node_modules\@openzeppelin\contracts\utils\Context.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/*
* @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 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.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// File: @openzeppelin\contracts\access\Ownable.sol
pragma solidity ^0.8.0;
/**
* @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.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* 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.
*/
abstract 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 () {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual 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;
}
}
// File: @openzeppelin\contracts\security\ReentrancyGuard.sol
pragma solidity ^0.8.0;
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor () {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and make it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
}
// File: @openzeppelin\contracts\token\ERC20\IERC20.sol
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
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);
}
// File: node_modules\@openzeppelin\contracts\utils\Address.sol
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
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) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @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");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
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);
}
}
}
}
// File: @openzeppelin\contracts\token\ERC20\utils\SafeERC20.sol
pragma solidity ^0.8.0;
/**
* @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 IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
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) + value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
unchecked {
uint256 oldAllowance = token.allowance(address(this), spender);
require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
uint256 newAllowance = oldAllowance - value;
_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");
}
}
}
// File: contracts\MasterChef.sol
pragma solidity ^0.8.0;
interface IStakingRewardVault {
function transfer(address _receiver, uint256 _amount) external;
}
contract MasterChef is Ownable, ReentrancyGuard {
using SafeERC20 for IERC20;
uint256 internal constant REWARD_PER_SHARE_MULTIPLIER = 1e12;
uint256 internal constant BLOCK_PER_MONTH = 172800; // 5760 blocks/day * 30 days
struct User {
uint256 amount;
uint256 rewardDebt;
}
struct Pool {
IERC20 token;
uint256 allocPoint;
uint256 lastRewardBlock;
uint256 rewardPerShare;
}
IStakingRewardVault public vault;
IERC20 public cpdtToken;
Pool[] public pools;
mapping(uint256 => mapping(address => User)) public users;
uint256 public totalAllocPoint;
uint256 public startBlock;
mapping(address => bool) public tokenExisted;
event PoolAdded(address token, uint256 allocPoint);
event PoolUpdated(uint256 pid, uint256 allocPoint);
event Staked(address user, uint256 pid, uint256 amount);
event Unstaked(address user, uint256 pid, uint256 amount);
event EmergencyWithdraw(address user, uint256 pid, uint256 amount);
event RewardWithdraw(address receiver, uint256 amount);
modifier poolExist(uint256 _pid) {
require(_pid < pools.length, "MasterChef: pool has not existed");
_;
}
constructor(IStakingRewardVault _vault, IERC20 _cpdtToken, uint256 _startBlock)
{
vault = _vault;
cpdtToken = _cpdtToken;
startBlock = _startBlock;
}
function getTotalPools() public view returns (uint256) {
return pools.length;
}
function add(address _token, uint256 _allocPoint, bool _withUpdate)
public
onlyOwner
{
require(_token != address(0) && !tokenExisted[_token], "MasterChef: token is invalid");
tokenExisted[_token] = true;
if (_withUpdate) {
massUpdatePools();
}
uint256 lastRewardBlock = block.number > startBlock ? block.number : startBlock;
pools.push(Pool({
token: IERC20(_token),
allocPoint: _allocPoint,
lastRewardBlock: lastRewardBlock,
rewardPerShare: 0
}));
totalAllocPoint += _allocPoint;
emit PoolAdded(_token, _allocPoint);
}
function set(uint256 _pid, uint256 _allocPoint, bool _withUpdate)
public
onlyOwner
poolExist(_pid)
{
if (_withUpdate) {
massUpdatePools();
}
totalAllocPoint = totalAllocPoint - pools[_pid].allocPoint + _allocPoint;
pools[_pid].allocPoint = _allocPoint;
emit PoolUpdated(_pid, _allocPoint);
}
function rewardToShare(uint256 _reward, uint256 _rewardPerShare) public pure returns (uint256) {
return (_reward * REWARD_PER_SHARE_MULTIPLIER) / _rewardPerShare;
}
function shareToReward(uint256 _share, uint256 _rewardPerShare) public pure returns (uint256) {
return (_share * _rewardPerShare) / REWARD_PER_SHARE_MULTIPLIER;
}
function pendingReward(uint256 _pid, address _account) public view returns (uint256) {
if (_pid >= pools.length) {
return 0;
}
Pool memory pool = pools[_pid];
User memory user = users[_pid][_account];
uint256 rewardPerShare = pool.rewardPerShare;
uint256 supply = pool.token.balanceOf(address(this));
if (block.number > pool.lastRewardBlock && supply != 0) {
uint256 reward = getRewardManyBlock(pool.lastRewardBlock, block.number) * pool.allocPoint / totalAllocPoint;
uint256 remaining = cpdtToken.balanceOf(address(vault));
if (reward > remaining) {
reward = remaining;
}
if (reward > 0) {
rewardPerShare += rewardToShare(reward, supply);
}
}
return shareToReward(user.amount, rewardPerShare) - user.rewardDebt;
}
function massUpdatePools() public {
uint256 length = pools.length;
for (uint256 pid = 0; pid < length; pid++) {
updatePool(pid);
}
}
function updatePool(uint256 _pid)
public
poolExist(_pid)
nonReentrant
{
Pool storage pool = pools[_pid];
if (block.number <= pool.lastRewardBlock) {
return;
}
uint256 supply = pool.token.balanceOf(address(this));
if (supply == 0 || pool.allocPoint == 0) {
pool.lastRewardBlock = block.number;
return;
}
uint256 reward = getRewardManyBlock(pool.lastRewardBlock, block.number) * pool.allocPoint / totalAllocPoint;
uint256 remaining = cpdtToken.balanceOf(address(vault));
if (reward > remaining) {
reward = remaining;
}
if (reward > 0) {
vault.transfer(address(this), reward);
pool.rewardPerShare += rewardToShare(reward, supply);
}
pool.lastRewardBlock = block.number;
}
function stake(uint256 _pid, uint256 _amount)
public
{
address msgSender = _msgSender();
Pool storage pool = pools[_pid];
User storage user = users[_pid][msgSender];
updatePool(_pid);
if (user.amount > 0) {
uint256 pending = shareToReward(user.amount, pool.rewardPerShare) - user.rewardDebt;
if (pending > 0) {
cpdtToken.safeTransfer(msgSender, pending);
}
}
if (_amount > 0) {
pool.token.safeTransferFrom(msgSender, address(this), _amount);
user.amount += _amount;
}
user.rewardDebt = shareToReward(user.amount, pool.rewardPerShare);
emit Staked(msgSender, _pid, _amount);
}
function unstake(uint256 _pid, uint256 _amount)
public
{
address msgSender = _msgSender();
Pool storage pool = pools[_pid];
User storage user = users[_pid][msgSender];
require(user.amount >= _amount, "MasterChef: amount exceeds stake");
updatePool(_pid);
uint256 pending = shareToReward(user.amount, pool.rewardPerShare) - user.rewardDebt;
if (pending > 0) {
cpdtToken.safeTransfer(msgSender, pending);
}
if (_amount > 0) {
user.amount -= _amount;
pool.token.safeTransfer(msgSender, _amount);
}
user.rewardDebt = shareToReward(user.amount, pool.rewardPerShare);
emit Unstaked(msgSender, _pid, _amount);
}
// Unstaked without caring about rewards. EMERGENCY ONLY.
function emergencyWithdraw(uint256 _pid)
public
poolExist(_pid)
nonReentrant
{
address msgSender = _msgSender();
Pool storage pool = pools[_pid];
User storage user = users[_pid][msgSender];
pool.token.safeTransfer(msgSender, user.amount);
emit EmergencyWithdraw(msgSender, _pid, user.amount);
user.amount = 0;
user.rewardDebt = 0;
}
function getRate(uint256 month)
public
pure
returns(uint256)
{
if (month == 1) {
return 200;
} else if (month == 2) {
return 180;
} else if (month == 3) {
return 160;
} else if (month == 4) {
return 140;
} else if (month == 5) {
return 120;
} else if (month >= 6 && month <= 12) {
return 100;
} else if (month >= 13 && month <= 24) {
return 50;
} else {
return 0;
}
}
function getRewardPerBlock(uint256 currentBlock)
public
view
returns(uint256)
{
uint256 month = (currentBlock - startBlock) / BLOCK_PER_MONTH + 1;
uint256 rewardPerMonth = 276000000 * 1e18 * getRate(month) / 2100;
return rewardPerMonth / BLOCK_PER_MONTH;
}
function getRewardManyBlock(uint256 blockFrom, uint256 blockTo)
public
view
returns(uint256)
{
uint256 reward = 0;
uint256 start = startBlock;
if (blockFrom < start || blockFrom >= blockTo) {
return reward;
}
uint256 month = (blockFrom - start) / BLOCK_PER_MONTH + 1;
for (uint256 i = month; i <= 24; i++) {
uint256 milestone = start + (BLOCK_PER_MONTH * i);
if (blockFrom >= milestone) {
continue;
}
uint256 rewardPerBlock = (276000000 * 1e18 * getRate(i) / 2100) / BLOCK_PER_MONTH;
if (blockTo <= milestone) {
reward += (blockTo - blockFrom) * rewardPerBlock;
break;
}
reward += (milestone - blockFrom) * rewardPerBlock;
blockFrom = milestone;
}
return reward;
}
function withdrawReward()
public
onlyOwner
{
address msgSender = _msgSender();
uint256 rewardPerBlock = getRewardPerBlock(block.number);
require(rewardPerBlock == 0, "MasterChef: can not withdraw");
massUpdatePools();
uint256 remaining = cpdtToken.balanceOf(address(vault));
require(remaining > 0, "MasterChef: no reward");
vault.transfer(msgSender, remaining);
emit RewardWithdraw(msgSender, remaining);
}
}