// File: contracts/PotionDaoChef.sol



// SPDX-License-Identifier: MIT

// File @openzeppelin/contracts/utils/Context.sol@v4.5.0

// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

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) {
        return msg.data;
    }
}

// File @openzeppelin/contracts/access/Ownable.sol@v4.5.0

// OpenZeppelin Contracts v4.4.1 (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() {
        _transferOwnership(_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 {
        _transferOwnership(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");
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

// File @openzeppelin/contracts/token/ERC20/IERC20.sol@v4.5.0

// OpenZeppelin Contracts (last updated v4.5.0) (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 `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, 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 `from` to `to` 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 from,
        address to,
        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@v4.5.0

// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @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
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 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");

        (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");

        (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");

        (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");

        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal 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

                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

// File @openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol@v4.5.0

// OpenZeppelin Contracts v4.4.1 (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'
        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
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}

// File contracts/interfaces/IPotionDaoStaking.sol

pragma solidity 0.8.4;

interface IPotionDaoStaking {
    function addReward(address rewardsToken, address distributor) external;

    function mint(address user, uint256 amount) external;

    function notifyRewardAmount(address rewardsToken, uint256 reward) external;
}

// File contracts/interfaces/IRewarder.sol

pragma solidity 0.8.4;

interface IRewarder {
    function onReward(
        uint256 pid,
        address user,
        address recipient,
        uint256 rewardAmount,
        uint256 newLpAmount
    ) external;

    function pendingTokens(
        uint256 pid,
        address user,
        uint256 rewardAmount
    ) external view returns (IERC20[] memory, uint256[] memory);
}

// File @openzeppelin/contracts/utils/introspection/IERC165.sol@v4.5.0

// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[EIP].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165 {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

// File @openzeppelin/contracts/token/ERC721/IERC721.sol@v4.5.0

// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol)

pragma solidity ^0.8.0;

/**
 * @dev Required interface of an ERC721 compliant contract.
 */
interface IERC721 is IERC165 {
    /**
     * @dev Emitted when `tokenId` token is transferred from `from` to `to`.
     */
    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
     */
    event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
     */
    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);

    /**
     * @dev Returns the number of tokens in ``owner``'s account.
     */
    function balanceOf(address owner) external view returns (uint256 balance);

    /**
     * @dev Returns the owner of the `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function ownerOf(uint256 tokenId) external view returns (address owner);

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
     * are aware of the ERC721 protocol to prevent tokens from being forever locked.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external;

    /**
     * @dev Transfers `tokenId` token from `from` to `to`.
     *
     * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external;

    /**
     * @dev Gives permission to `to` to transfer `tokenId` token to another account.
     * The approval is cleared when the token is transferred.
     *
     * Only a single account can be approved at a time, so approving the zero address clears previous approvals.
     *
     * Requirements:
     *
     * - The caller must own the token or be an approved operator.
     * - `tokenId` must exist.
     *
     * Emits an {Approval} event.
     */
    function approve(address to, uint256 tokenId) external;

    /**
     * @dev Returns the account approved for `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function getApproved(uint256 tokenId) external view returns (address operator);

    /**
     * @dev Approve or remove `operator` as an operator for the caller.
     * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
     *
     * Requirements:
     *
     * - The `operator` cannot be the caller.
     *
     * Emits an {ApprovalForAll} event.
     */
    function setApprovalForAll(address operator, bool _approved) external;

    /**
     * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
     *
     * See {setApprovalForAll}
     */
    function isApprovedForAll(address owner, address operator) external view returns (bool);

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId,
        bytes calldata data
    ) external;
}

// File contracts/interfaces/INFTController.sol

pragma solidity 0.8.4;

interface INFTController {
    function getBoostRate(address token, uint256 tokenId) external view returns (uint256 boostRate);

    function isWhitelistedNFT(address token) external view returns (bool);
}

// File contracts/farms/PotionDaoChef.sol

pragma solidity 0.8.4;

contract PotionDaoChef is Ownable {
    using SafeERC20 for IERC20;

    struct UserInfo {
        uint256 amount;
        int256 rewardDebt;
    }

    struct PoolInfo {
        uint256 accRewardPerShare;
        uint256 lastRewardTime;
        uint256 allocPoint;
    }

    struct NFTSlot {
        address[3] tokenAddress;
        uint256[3] tokenId;
    }

    IPotionDaoStaking public rewardMinter;
    
    /// @notice Info of each MCV2 pool.
    PoolInfo[] public poolInfo;
    /// @notice Address of the LP token for each MCV2 pool.
    IERC20[] public lpToken;
    /// @notice Address of each `IRewarder` contract in MCV2.
    IRewarder[] public rewarder;

    /// @notice Info of each user that stakes LP tokens.
    mapping(uint256 => mapping(address => UserInfo)) public userInfo;
    /// @dev Total allocation points. Must be the sum of all allocation points in all pools.
    uint256 public totalAllocPoint = 0;

    uint256 public rewardPerSecond;
    uint256 private constant ACC_REWARD_PRECISION = 1e12;
    uint256 private constant MAX_REWARD_PER_SECOND = 5000000e18; // 5m token per second

    mapping(address => mapping(uint256 => NFTSlot)) private _depositedNFT;
    INFTController public controller = INFTController(address(0));
    uint256 public nftBoostRate = 100;

  constructor(address initialOwner) {
        transferOwnership(initialOwner);
    }

    /* ========== PUBLIC FUNCTIONS ========== */

    /// @notice Returns the number of MCV2 pools.
    function poolLength() public view returns (uint256 pools) {
        pools = poolInfo.length;
    }

    /// @notice View function to see pending reward on frontend.
    /// @param _pid The index of the pool. See `poolInfo`.
    /// @param _user Address of user.
    /// @return pending reward for a given user.
    function pendingReward(uint256 _pid, address _user) external view returns (uint256 pending) {
        PoolInfo memory pool = poolInfo[_pid];
        UserInfo storage user = userInfo[_pid][_user];
        uint256 accRewardPerShare = pool.accRewardPerShare;
        uint256 lpSupply = lpToken[_pid].balanceOf(address(this));
        if (block.timestamp > pool.lastRewardTime && lpSupply != 0) {
            uint256 time = block.timestamp - pool.lastRewardTime;
            uint256 rewardAmount = (time * rewardPerSecond * pool.allocPoint) / totalAllocPoint;
            accRewardPerShare += (rewardAmount * ACC_REWARD_PRECISION) / lpSupply;
        }
        pending = uint256(int256((user.amount * accRewardPerShare) / ACC_REWARD_PRECISION) - user.rewardDebt);
    }

    /// @notice Update reward variables of the given pool.
    /// @param pid The index of the pool. See `poolInfo`.
    /// @return pool Returns the pool that was updated.
    function updatePool(uint256 pid) public returns (PoolInfo memory pool) {
        pool = poolInfo[pid];
        if (block.timestamp > pool.lastRewardTime) {
            uint256 lpSupply = lpToken[pid].balanceOf(address(this));
            if (lpSupply > 0) {
                uint256 time = block.timestamp - pool.lastRewardTime;
                uint256 rewardAmount = (time * rewardPerSecond * pool.allocPoint) / totalAllocPoint;
                pool.accRewardPerShare += (rewardAmount * ACC_REWARD_PRECISION) / lpSupply;
            }
            pool.lastRewardTime = block.timestamp;
            poolInfo[pid] = pool;
            emit LogUpdatePool(pid, pool.lastRewardTime, lpSupply, pool.accRewardPerShare);
        }
    }

    /// @notice Update reward variables for all pools. Be careful of gas spending!
    function massUpdatePools() public {
        uint256 len = poolInfo.length;
        for (uint256 i = 0; i < len; ++i) {
            updatePool(i);
        }
    }

    /// @notice Deposit LP tokens to MCV2 for reward allocation.
    /// @param pid The index of the pool. See `poolInfo`.
    /// @param amount LP token amount to deposit.
    /// @param to The receiver of `amount` deposit benefit.
    function deposit(
        uint256 pid,
        uint256 amount,
        address to
    ) public {
        PoolInfo memory pool = updatePool(pid);
        UserInfo storage user = userInfo[pid][to];

        // Effects
        user.amount += amount;
        user.rewardDebt += int256((amount * pool.accRewardPerShare) / ACC_REWARD_PRECISION);

        // Interactions
        IRewarder _rewarder = rewarder[pid];
        if (address(_rewarder) != address(0)) {
            _rewarder.onReward(pid, to, to, 0, user.amount);
        }

        lpToken[pid].safeTransferFrom(msg.sender, address(this), amount);

        emit Deposit(msg.sender, pid, amount, to);
    }

    /// @notice Withdraw LP tokens from MCV2.
    /// @param pid The index of the pool. See `poolInfo`.
    /// @param amount LP token amount to withdraw.
    /// @param to Receiver of the LP tokens.
    function withdraw(
        uint256 pid,
        uint256 amount,
        address to
    ) public {
        PoolInfo memory pool = updatePool(pid);
        UserInfo storage user = userInfo[pid][msg.sender];

        // Effects
        user.rewardDebt -= int256((amount * pool.accRewardPerShare) / ACC_REWARD_PRECISION);
        user.amount -= amount;

        // Interactions
        IRewarder _rewarder = rewarder[pid];
        if (address(_rewarder) != address(0)) {
            _rewarder.onReward(pid, msg.sender, to, 0, user.amount);
        }

        lpToken[pid].safeTransfer(to, amount);

        emit Withdraw(msg.sender, pid, amount, to);
    }

    /// @notice Harvest proceeds for transaction sender to `to`.
    /// @param pid The index of the pool. See `poolInfo`.
    /// @param to Receiver of rewards.
    function harvest(uint256 pid, address to) public {
        PoolInfo memory pool = updatePool(pid);
        UserInfo storage user = userInfo[pid][msg.sender];
        int256 accumulatedReward = int256((user.amount * pool.accRewardPerShare) / ACC_REWARD_PRECISION);
        uint256 _pendingReward = uint256(accumulatedReward - user.rewardDebt);

        // Effects
        user.rewardDebt = accumulatedReward;

        // Interactions
        if (_pendingReward != 0) {
            rewardMinter.mint(to, _pendingReward);
            uint256 boost = (_pendingReward * getBoost(msg.sender, pid)) / nftBoostRate;
            if (boost > 0) rewardMinter.mint(to, boost);
        }

        IRewarder _rewarder = rewarder[pid];
        if (address(_rewarder) != address(0)) {
            _rewarder.onReward(pid, msg.sender, to, _pendingReward, user.amount);
        }

        emit Harvest(msg.sender, pid, _pendingReward);
    }

    /// @notice Withdraw LP tokens from MCV2 and harvest proceeds for transaction sender to `to`.
    /// @param pid The index of the pool. See `poolInfo`.
    /// @param amount LP token amount to withdraw.
    /// @param to Receiver of the LP tokens and rewards.
    function withdrawAndHarvest(
        uint256 pid,
        uint256 amount,
        address to
    ) public {
        PoolInfo memory pool = updatePool(pid);
        UserInfo storage user = userInfo[pid][msg.sender];
        int256 accumulatedReward = int256((user.amount * pool.accRewardPerShare) / ACC_REWARD_PRECISION);
        uint256 _pendingReward = uint256(accumulatedReward - user.rewardDebt);

        // Effects
        user.rewardDebt = accumulatedReward - int256((amount * pool.accRewardPerShare) / ACC_REWARD_PRECISION);
        user.amount -= amount;

        // Interactions
        if (_pendingReward != 0) {
            rewardMinter.mint(to, _pendingReward);
            uint256 boost = (_pendingReward * getBoost(msg.sender, pid)) / nftBoostRate;
            if (boost > 0) rewardMinter.mint(to, boost);
        }

        IRewarder _rewarder = rewarder[pid];
        if (address(_rewarder) != address(0)) {
            _rewarder.onReward(pid, msg.sender, to, _pendingReward, user.amount);
        }

        lpToken[pid].safeTransfer(to, amount);

        emit Withdraw(msg.sender, pid, amount, to);
        emit Harvest(msg.sender, pid, _pendingReward);
    }

    /// @notice Withdraw without caring about rewards. EMERGENCY ONLY.
    /// @param pid The index of the pool. See `poolInfo`.
    /// @param to Receiver of the LP tokens.
    function emergencyWithdraw(uint256 pid, address to) public {
        UserInfo storage user = userInfo[pid][msg.sender];
        uint256 amount = user.amount;
        user.amount = 0;
        user.rewardDebt = 0;

        IRewarder _rewarder = rewarder[pid];
        if (address(_rewarder) != address(0)) {
            _rewarder.onReward(pid, msg.sender, to, 0, 0);
        }

        // Note: transfer can fail or succeed if `amount` is zero.
        lpToken[pid].safeTransfer(to, amount);
        emit EmergencyWithdraw(msg.sender, pid, amount, to);
    }

    function harvestAllRewards(address to) external {
        uint256 length = poolInfo.length;
        for (uint256 pid = 0; pid < length; ++pid) {
            harvest(pid, to);
        }
    }

    /* ========== INTERNAL FUNCTIONS ========== */

    function checkPoolDuplicate(IERC20 _lpToken) internal view {
        uint256 length = poolInfo.length;
        for (uint256 pid = 0; pid < length; ++pid) {
            require(lpToken[pid] != _lpToken, "add: existing pool?");
        }
    }

    /* ========== RESTRICTED FUNCTIONS ========== */

    /// @notice Add a new LP to the pool. Can only be called by the owner.
    /// DO NOT add the same LP token more than once. Rewards will be messed up if you do.
    /// @param allocPoint AP of the new pool.
    /// @param _lpToken Address of the LP ERC-20 token.
    /// @param _rewarder Address of the rewarder delegate.
    function add(
        uint256 allocPoint,
        IERC20 _lpToken,
        IRewarder _rewarder
    ) public onlyOwner {
        checkPoolDuplicate(_lpToken);
        massUpdatePools();
        totalAllocPoint += allocPoint;
        lpToken.push(_lpToken);
        rewarder.push(_rewarder);

        poolInfo.push(PoolInfo({allocPoint: allocPoint, lastRewardTime: block.timestamp, accRewardPerShare: 0}));
        emit LogPoolAddition(lpToken.length - 1, allocPoint, _lpToken, _rewarder);
    }

    /// @notice Update the given pool's reward allocation point and `IRewarder` contract. Can only be called by the owner.
    /// @param _pid The index of the pool. See `poolInfo`.
    /// @param _allocPoint New AP of the pool.
    /// @param _rewarder Address of the rewarder delegate.
    /// @param overwrite True if _rewarder should be `set`. Otherwise `_rewarder` is ignored.
    function set(
        uint256 _pid,
        uint256 _allocPoint,
        IRewarder _rewarder,
        bool overwrite
    ) public onlyOwner {
        massUpdatePools();
        totalAllocPoint = totalAllocPoint - poolInfo[_pid].allocPoint + _allocPoint;
        poolInfo[_pid].allocPoint = _allocPoint;
        if (overwrite) {
            rewarder[_pid] = _rewarder;
        }
        emit LogSetPool(_pid, _allocPoint, overwrite ? _rewarder : rewarder[_pid], overwrite);
    }

    /// @notice Sets the reward per second to be distributed. Can only be called by the owner.
    /// @param _rewardPerSecond The amount of reward to be distributed per second.
    function setRewardPerSecond(uint256 _rewardPerSecond) public onlyOwner {
        require(_rewardPerSecond <= MAX_REWARD_PER_SECOND, "PotionDaoChef::setRewardPerSecond: > MAX_REWARD_PER_SECOND");
        massUpdatePools();
        rewardPerSecond = _rewardPerSecond;
        emit LogRewardPerSecond(_rewardPerSecond);
    }



    /// @notice Set the address of rewardMinter.  Can only be called ONCE by the owner.
    /// @param _rewardMinter Address of MultiFeeDistribution contract
    function setRewardMinter(IPotionDaoStaking _rewardMinter) external {
        require(address(rewardMinter) == address(0), "PotionDaoChef::setRewardMinter: Cannot redefine rewardMinter");
        rewardMinter = _rewardMinter;
    }

    function getBoost(address _account, uint256 _pid) public view returns (uint256) {
        if (address(controller) == address(0)) return 0;

        NFTSlot memory slot = _depositedNFT[_account][_pid];
        uint256 boost = 0;
        for (uint256 i = 0; i < 3; i++) {
            boost += controller.getBoostRate(slot.tokenAddress[i], slot.tokenId[i]);
        }
        return boost; // boosts from 0% onwards
    }

    function getSlots(address _account, uint256 _pid)
        public
        view
        returns (
            address,
            address,
            address
        )
    {
        NFTSlot memory slot = _depositedNFT[_account][_pid];
        return (slot.tokenAddress[0], slot.tokenAddress[1], slot.tokenAddress[2]);
    }

    function getTokenIds(address _account, uint256 _pid)
        public
        view
        returns (
            uint256,
            uint256,
            uint256
        )
    {
        NFTSlot memory slot = _depositedNFT[_account][_pid];
        return (slot.tokenId[0], slot.tokenId[1], slot.tokenId[2]);
    }

    function depositNFT(
        address _nft,
        uint256 _tokenId,
        uint256 _slotIndex,
        uint256 _pid
    ) public {
        require(controller.isWhitelistedNFT(_nft), "only approved NFTs");
        require(IERC721(_nft).ownerOf(_tokenId) == msg.sender, "User does not have the specified NFT");
        UserInfo storage user = userInfo[_pid][msg.sender];
        require(user.amount == 0, "Not allowed to deposit");

        IERC721(_nft).transferFrom(msg.sender, address(this), _tokenId);

        NFTSlot memory slot = _depositedNFT[msg.sender][_pid];
        require(slot.tokenAddress[_slotIndex] == address(0), "Already deposited this slot");
        slot.tokenAddress[_slotIndex] = _nft;
        slot.tokenId[_slotIndex] = _tokenId;

        _depositedNFT[msg.sender][_pid] = slot;

        emit DepositNFT(_nft, _tokenId, _pid);
    }

    function withdrawNFT(uint256 _slotIndex, uint256 _pid) public {
        NFTSlot storage slot = _depositedNFT[msg.sender][_pid];

        address _nft = slot.tokenAddress[_slotIndex];
        uint256 _tokenId = slot.tokenId[_slotIndex];

        require(_nft != address(0), "NFT does not exist");
        IERC721(_nft).transferFrom(address(this), msg.sender, _tokenId);

        slot.tokenAddress[_slotIndex] = address(0);

        emit WithdrawNFT(_nft, _slotIndex, _pid);
    }

    function setNftController(address _controller) public onlyOwner {
        controller = INFTController(_controller);
        emit UpdateNFTController(msg.sender, _controller);
    }

    function setNftBoostRate(uint256 _rate) public onlyOwner {
        require(_rate >= 100, "boost must be within range");
        nftBoostRate = _rate;
        emit UpdateNFTBoostRate(msg.sender, _rate);
    }

    /* =============== EVENTS ==================== */

    event Deposit(address indexed user, uint256 indexed pid, uint256 amount, address indexed to);
    event Withdraw(address indexed user, uint256 indexed pid, uint256 amount, address indexed to);
    event EmergencyWithdraw(address indexed user, uint256 indexed pid, uint256 amount, address indexed to);
    event Harvest(address indexed user, uint256 indexed pid, uint256 amount);
    event LogPoolAddition(uint256 indexed pid, uint256 allocPoint, IERC20 indexed lpToken, IRewarder indexed rewarder);
    event LogSetPool(uint256 indexed pid, uint256 allocPoint, IRewarder indexed rewarder, bool overwrite);
    event LogUpdatePool(uint256 indexed pid, uint256 lastRewardTime, uint256 lpSupply, uint256 accRewardPerShare);
    event LogRewardPerSecond(uint256 rewardPerSecond);
    event DepositNFT(address _nft, uint256 _tokenId, uint256 _pid);
    event WithdrawNFT(address _nft, uint256 _tokenId, uint256 _pid);
    event UpdateNFTController(address indexed user, address controller);
    event UpdateNFTBoostRate(address indexed user, uint256 controller);
}