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// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";

/// @title JPEG'd LP Farming
/// @notice Users can stake their JPEG'd ecosystem LP tokens to get JPEG rewards
/// @dev This contract doesn't mint JPEG tokens, instead the owner (the JPEG'd DAO) allocates x amount of JPEG to be distributed as a reward for liquidity providers.
/// To ensure that enough tokens are allocated, an epoch system is implemented.
/// The owner is required to allocate enough tokens (`_rewardPerBlock * (_endBlock - _startBlock)`) when creating a new epoch.
/// When there no epoch is ongoing, the contract stops emitting rewards
contract LPFarming is Ownable, ReentrancyGuard {
    using SafeERC20 for IERC20;
    using Address for address;

    event Deposit(address indexed user, uint256 indexed pid, uint256 amount);
    event Withdraw(address indexed user, uint256 indexed pid, uint256 amount);
    event Claim(address indexed user, uint256 indexed pid, uint256 amount);
    event ClaimAll(address indexed user, uint256 amount);

    /// @dev Data relative to a user's staking position
    /// @param amount The amount of LP tokens the user has provided
    /// @param lastAccRewardPerShare The `accRewardPerShare` pool value at the time of the user's last claim
    struct UserInfo {
        uint256 amount;
        uint256 lastAccRewardPerShare;
    }

    /// @dev Data relative to an LP pool
    /// @param lpToken The LP token accepted by the pool
    /// @param allocPoint Allocation points assigned to the pool. Determines the share of `rewardPerBlock` allocated to this pool
    /// @param lastRewardBlock Last block number in which reward distribution occurred
    /// @param accRewardPerShare Accumulated rewards per share, times 1e36. The amount of rewards the pool has accumulated per unit of LP token deposited
    struct PoolInfo {
        IERC20 lpToken;
        uint256 allocPoint;
        uint256 lastRewardBlock;
        uint256 accRewardPerShare;
    }

    /// @dev Data relative to an epoch
    /// @param startBlock The epoch's starting block
    /// @param endBlock The epoch's starting block
    /// @param rewardPerBlock The amount of JPEG rewards distributed per block during this epoch
    struct EpochInfo {
        uint256 startBlock;
        uint256 endBlock;
        uint256 rewardPerBlock;
    }

    /// @notice The reward token, JPEG
    IERC20 public immutable jpeg;

    /// @notice The current epoch
    /// @dev We don't need to store data about previous epochs, to simplify logic we only store data about the current epoch
    EpochInfo public epoch;
    /// @notice All the LP pools, active and inactive
    PoolInfo[] public poolInfo;
    /// @notice User staking positions, divided by PID
    mapping(uint256 => mapping(address => UserInfo)) public userInfo;
    /// @notice Sum of the allocation points for all the pools
    /// @dev Used to calculate the share of `rewardPerBlock` for each pool.
    uint256 public totalAllocPoint;

    /// @dev User's (total) withdrawable rewards
    mapping(address => uint256) private userRewards;
    /// @notice Contracts that are allowed to interact with the LP farm
    /// @dev See the {noContract} modifier for more info
    mapping(address => bool) public whitelistedContracts;

    /// @param _jpeg The reward token
    constructor(address _jpeg) {
        jpeg = IERC20(_jpeg);
    }

    /// @dev Modifier that ensures that non-whitelisted contracts can't interact with the LP farm.
    /// Prevents non-whitelisted 3rd party contracts (e.g. autocompounders) from diluting liquidity providers
    /// @param _account Address to check
    modifier noContract(address _account) {
        require(
            !_account.isContract() || whitelistedContracts[_account],
            "Contracts aren't allowed to farm"
        );
        _;
    }

    /// @notice Allows the owner to whitelist/blacklist contracts
    /// @param _contract The contract address to whitelist/blacklist
    /// @param _isWhitelisted Whereter to whitelist or blacklist `_contract`
    function setContractWhitelisted(address _contract, bool _isWhitelisted)
        external
        onlyOwner
    {
        whitelistedContracts[_contract] = _isWhitelisted;
    }

    /// @notice Allows the owner to start a new epoch. Can only be called when there's no ongoing epoch
    /// @param _startBlock The new epoch's start block. Has to be greater than the previous epoch's `endBlock`
    /// @param _endBlock The new epoch's end block. Has to be greater than `_startBlock`
    /// @param _rewardPerBlock The new epoch's amount of rewards to distribute per block. Must be greater than 0
    function newEpoch(
        uint256 _startBlock,
        uint256 _endBlock,
        uint256 _rewardPerBlock
    ) external onlyOwner {
        require(_startBlock >= block.number, "Invalid start block");
        require(_endBlock > _startBlock, "Invalid end block");
        require(_rewardPerBlock > 0, "Invalid reward per block");

        //update all pools to ensure that they have all been updated up to the last epoch's `endBlock`
        _massUpdatePools();

        uint256 remainingRewards = epoch.rewardPerBlock *
            (epoch.endBlock - _blockNumber());
        uint256 newRewards = _rewardPerBlock * (_endBlock - _startBlock);

        epoch.startBlock = _startBlock;
        epoch.endBlock = _endBlock;
        epoch.rewardPerBlock = _rewardPerBlock;

        if (remainingRewards > newRewards) {
            jpeg.safeTransfer(msg.sender, remainingRewards - newRewards);
        } else if (remainingRewards < newRewards) {
            jpeg.safeTransferFrom(
                msg.sender,
                address(this),
                newRewards - remainingRewards
            );
        }
    }

    /// @notice Allows the owner to add a new pool
    /// @param _allocPoint Allocation points to assign to the new pool
    /// @param _lpToken The LP token accepted by the new pool
    function add(uint256 _allocPoint, IERC20 _lpToken) external onlyOwner {
        _massUpdatePools();

        uint256 lastRewardBlock = _blockNumber();
        totalAllocPoint = totalAllocPoint + _allocPoint;
        poolInfo.push(
            PoolInfo({
                lpToken: _lpToken,
                allocPoint: _allocPoint,
                lastRewardBlock: lastRewardBlock,
                accRewardPerShare: 0
            })
        );
    }

    /// @notice Allows the owner to change a pool's allocation points
    /// @param _pid The pool id of the pool to modify
    /// @param _allocPoint The new allocation points
    function set(uint256 _pid, uint256 _allocPoint) external onlyOwner {
        _massUpdatePools();

        uint256 prevAllocPoint = poolInfo[_pid].allocPoint;
        poolInfo[_pid].allocPoint = _allocPoint;
        if (prevAllocPoint != _allocPoint) {
            totalAllocPoint = totalAllocPoint - prevAllocPoint + _allocPoint;
        }
    }

    /// @notice Returns the number of pools available
    /// @return The length of the `poolInfo` array
    function poolLength() external view returns (uint256) {
        return poolInfo.length;
    }

    /// @notice Frontend function used to calculate the amount of rewards `_user` can claim from the pool with id `_pid`
    /// @param _pid The pool id
    /// @param _user The address of the user
    /// @return The amount of rewards claimable from `_pid` by user `_user`
    function pendingReward(uint256 _pid, address _user)
        external
        view
        returns (uint256)
    {
        PoolInfo storage pool = poolInfo[_pid];
        UserInfo storage user = userInfo[_pid][_user];
        uint256 accRewardPerShare = pool.accRewardPerShare;
        uint256 blockNumber = _blockNumber();
        //normalizing the pool's `lastRewardBlock` ensures that no rewards are distributed by staking outside of an epoch
        uint256 lastRewardBlock = _normalizeBlockNumber(pool.lastRewardBlock);
        uint256 lpSupply = pool.lpToken.balanceOf(address(this));
        //if blockNumber is greater than the pool's `lastRewardBlock` the pool's `accRewardPerShare` is outdated,
        //we need to calculate the up to date amount to return an accurate reward value
        if (blockNumber > lastRewardBlock && lpSupply != 0) {
            uint256 reward = ((blockNumber - lastRewardBlock) *
                epoch.rewardPerBlock *
                1e36 *
                pool.allocPoint) / totalAllocPoint;
            accRewardPerShare += reward / lpSupply;
        }
        return
            //rewards that the user had already accumulated but not claimed
            userRewards[_user] +
            //subtracting the user's `lastAccRewardPerShare` from the pool's `accRewardPerShare` results in the amount of rewards per share
            //the pool has accumulated since the user's last claim, multiplying it by the user's shares results in the amount of new rewards claimable
            //by the user
            (user.amount * (accRewardPerShare - user.lastAccRewardPerShare)) /
            1e36;
    }

    /// @notice Allows users to deposit `_amount` of LP tokens in the pool with id `_pid`. Non whitelisted contracts can't call this function
    /// @dev Emits a {Deposit} event
    /// @param _pid The id of the pool to deposit into
    /// @param _amount The amount of LP tokens to deposit
    function deposit(uint256 _pid, uint256 _amount)
        external
        noContract(msg.sender)
    {
        require(_amount > 0, "invalid_amount");

        PoolInfo storage pool = poolInfo[_pid];
        UserInfo storage user = userInfo[_pid][msg.sender];
        _updatePool(_pid);
        _withdrawReward(_pid);

        pool.lpToken.safeTransferFrom(msg.sender, address(this), _amount);
        user.amount = user.amount + _amount;

        emit Deposit(msg.sender, _pid, _amount);
    }

    /// @notice Allows users to withdraw `_amount` of LP tokens from the pool with id `_pid`. Non whitelisted contracts can't call this function
    /// @dev Emits a {Withdraw} event
    /// @param _pid The id of the pool to withdraw from
    /// @param _amount The amount of LP tokens to withdraw
    function withdraw(uint256 _pid, uint256 _amount)
        external
        noContract(msg.sender)
    {
        require(_amount > 0, "invalid_amount");

        PoolInfo storage pool = poolInfo[_pid];
        UserInfo storage user = userInfo[_pid][msg.sender];
        require(user.amount >= _amount, "insufficient_amount");

        _updatePool(_pid);
        _withdrawReward(_pid);

        user.amount -= _amount;
        pool.lpToken.safeTransfer(address(msg.sender), _amount);

        emit Withdraw(msg.sender, _pid, _amount);
    }

    /// @dev Normalizes the current `block.number`. See {_normalizeBlockNumber} for more info
    /// @return Normalized `block.number`
    function _blockNumber() internal view returns (uint256) {
        return _normalizeBlockNumber(block.number);
    }

    /// @dev Normalizes `blockNumber` to fit within the bounds of an epoch.
    /// This is done to ensure that no rewards are distributed for staking outside of an epoch without modifying the reward logic.
    /// For example:
    /// `blockNumber` is 1100, the epoch's `endBlock` is 1000. In this case the function would return 1000. If this value were to be used
    /// in the {_updatePool} function, where the pool's `lastRewardBlock` is 990, only the rewards from block 990 to block 1000 would be distributed
    /// @return Normalized `blockNumber`
    function _normalizeBlockNumber(uint256 blockNumber)
        internal
        view
        returns (uint256)
    {
        if (blockNumber < epoch.startBlock) return epoch.startBlock;

        if (blockNumber > epoch.endBlock) return epoch.endBlock;

        return blockNumber;
    }

    /// @dev Calls {_updatePool} for every pool
    function _massUpdatePools() internal {
        uint256 length = poolInfo.length;
        for (uint256 pid = 0; pid < length; ++pid) {
            _updatePool(pid);
        }
    }

    /// @dev Updates the state of the pool at index `_pid`
    /// @param _pid The pool to update
    function _updatePool(uint256 _pid) internal {
        PoolInfo storage pool = poolInfo[_pid];
        if (pool.allocPoint == 0) {
            return;
        }

        uint256 blockNumber = _blockNumber();
        //normalizing the pool's `lastRewardBlock` ensures that no rewards are distributed by staking outside of an epoch
        uint256 lastRewardBlock = _normalizeBlockNumber(pool.lastRewardBlock);
        if (blockNumber <= lastRewardBlock) {
            return;
        }
        uint256 lpSupply = pool.lpToken.balanceOf(address(this));
        if (lpSupply == 0) {
            pool.lastRewardBlock = blockNumber;
            return;
        }
        uint256 reward = ((blockNumber - lastRewardBlock) *
            epoch.rewardPerBlock *
            1e36 *
            pool.allocPoint) / totalAllocPoint;
        pool.accRewardPerShare = pool.accRewardPerShare + reward / lpSupply;
        pool.lastRewardBlock = blockNumber;
    }

    /// @dev Updates `msg.sender`'s claimable rewards by adding pending rewards from `_pid`
    /// @param _pid The pool to withdraw rewards from
    function _withdrawReward(uint256 _pid) internal returns (uint256) {
        UserInfo storage user = userInfo[_pid][msg.sender];
        uint256 pending = (user.amount *
            (poolInfo[_pid].accRewardPerShare - user.lastAccRewardPerShare)) /
            1e36;
        if (pending > 0) {
            userRewards[msg.sender] += pending;
        }

        user.lastAccRewardPerShare = poolInfo[_pid].accRewardPerShare;

        return pending;
    }

    /// @notice Allows users to claim rewards from the pool with id `_pid`. Non whitelisted contracts can't call this function
    /// @dev Emits a {Claim} event
    /// @param _pid The pool to claim rewards from
    function claim(uint256 _pid) external nonReentrant noContract(msg.sender) {
        _updatePool(_pid);
        _withdrawReward(_pid);

        uint256 rewards = userRewards[msg.sender];
        require(rewards > 0, "no_reward");

        jpeg.safeTransfer(msg.sender, rewards);
        userRewards[msg.sender] = 0;

        emit Claim(msg.sender, _pid, rewards);
    }

    /// @notice Allows users to claim rewards from all pools. Non whitelisted contracts can't call this function
    /// @dev Emits a {ClaimAll} event
    function claimAll() external nonReentrant noContract(msg.sender) {
        for (uint256 i = 0; i < poolInfo.length; i++) {
            _updatePool(i);
            _withdrawReward(i);
        }

        uint256 rewards = userRewards[msg.sender];
        require(rewards > 0, "no_reward");

        jpeg.safeTransfer(msg.sender, rewards);
        userRewards[msg.sender] = 0;

        emit ClaimAll(msg.sender, rewards);
    }

    /// @dev Prevent the owner from renouncing ownership. Having no owner would render this contract unusable due to the inability to create new epochs
    function renounceOwnership() public view override onlyOwner {
        revert("Cannot renounce ownership");
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "../utils/Context.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.
 *
 * 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() {
        _setOwner(_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 {
        _setOwner(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");
        _setOwner(newOwner);
    }

    function _setOwner(address newOwner) private {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

// SPDX-License-Identifier: MIT

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;
    }
}

// SPDX-License-Identifier: MIT

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);
}

// SPDX-License-Identifier: MIT

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;
        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");

        (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);
            }
        }
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "../IERC20.sol";
import "../../../utils/Address.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 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");
        }
    }
}

// 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) {
        return msg.data;
    }
}

{
  "optimizer": {
    "enabled": true,
    "runs": 1000,
    "details": {
      "yul": false
    }
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[{"internalType":"address","name":"_jpeg","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":true,"internalType":"uint256","name":"pid","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Claim","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"ClaimAll","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":true,"internalType":"uint256","name":"pid","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Deposit","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":true,"internalType":"uint256","name":"pid","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Withdraw","type":"event"},{"inputs":[{"internalType":"uint256","name":"_allocPoint","type":"uint256"},{"internalType":"contract IERC20","name":"_lpToken","type":"address"}],"name":"add","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_pid","type":"uint256"}],"name":"claim","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"claimAll","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_pid","type":"uint256"},{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"deposit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"epoch","outputs":[{"internalType":"uint256","name":"startBlock","type":"uint256"},{"internalType":"uint256","name":"endBlock","type":"uint256"},{"internalType":"uint256","name":"rewardPerBlock","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"jpeg","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_startBlock","type":"uint256"},{"internalType":"uint256","name":"_endBlock","type":"uint256"},{"internalType":"uint256","name":"_rewardPerBlock","type":"uint256"}],"name":"newEpoch","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_pid","type":"uint256"},{"internalType":"address","name":"_user","type":"address"}],"name":"pendingReward","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"poolInfo","outputs":[{"internalType":"contract IERC20","name":"lpToken","type":"address"},{"internalType":"uint256","name":"allocPoint","type":"uint256"},{"internalType":"uint256","name":"lastRewardBlock","type":"uint256"},{"internalType":"uint256","name":"accRewardPerShare","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"poolLength","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_pid","type":"uint256"},{"internalType":"uint256","name":"_allocPoint","type":"uint256"}],"name":"set","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_contract","type":"address"},{"internalType":"bool","name":"_isWhitelisted","type":"bool"}],"name":"setContractWhitelisted","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"totalAllocPoint","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"address","name":"","type":"address"}],"name":"userInfo","outputs":[{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"lastAccRewardPerShare","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"whitelistedContracts","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_pid","type":"uint256"},{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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000000000000000000000000e80c0cd204d654cebe8dd64a4857cab6be8345a3

-----Decoded View---------------
Arg [0] : _jpeg (address): 0xE80C0cd204D654CEbe8dd64A4857cAb6Be8345a3

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 000000000000000000000000e80c0cd204d654cebe8dd64a4857cab6be8345a3