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// SPDX-License-Identifier: UNLICENSED

pragma solidity ^0.8.11;

import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";

contract LatticeStakingPool is ReentrancyGuard {
    using SafeMath for uint256;
    using SafeERC20 for IERC20;

    struct StakingPool {
        uint256 maxStakingAmountPerUser;
        uint256 totalAmountStaked;
        address[] usersStaked;
    }

    struct Project {
        string name;
        uint256 totalAmountStaked;
        uint256 numberOfPools;
        uint256 startTimestamp;
        uint256 endTimestamp;
    }

    struct UserInfo {
        address userAddress;
        uint256 poolId;
        uint256 percentageOfTokensStakedInPool;
        uint256 amountOfTokensStakedInPool;
    }

    IERC20 public stakingToken;

    address private owner;

    Project[] public projects;

    /// @notice ProjectID => Pool ID => User Address => amountStaked
    mapping(uint256 => mapping(uint256 => mapping(address => uint256)))
        public userStakedAmount;

    /// @notice ProjectID => Pool ID => User Address => didUserWithdrawFunds
    mapping(uint256 => mapping(uint256 => mapping(address => bool)))
        public didUserWithdrawFunds;

    /// @notice ProjectID => Pool ID => StakingPool
    mapping(uint256 => mapping(uint256 => StakingPool)) public stakingPoolInfo;

    /// @notice ProjectName => isProjectNameTaken
    mapping(string => bool) public isProjectNameTaken;

    /// @notice ProjectName => ProjectID
    mapping(string => uint256) public projectNameToProjectId;

    event Deposit(
        address indexed _user,
        uint256 indexed _projectId,
        uint256 indexed _poolId,
        uint256 _amount
    );
    event Withdraw(
        address indexed _user,
        uint256 indexed _projectId,
        uint256 indexed _poolId,
        uint256 _amount
    );
    event PoolAdded(uint256 indexed _projectId, uint256 indexed _poolId);
    event ProjectDisabled(uint256 indexed _projectId);
    event ProjectAdded(uint256 indexed _projectId, string _projectName);

    constructor(IERC20 _stakingToken) {
        require(
            address(_stakingToken) != address(0),
            "constructor: _stakingToken must not be zero address"
        );

        owner = msg.sender;
        stakingToken = _stakingToken;
    }

    function addProject(
        string memory _name,
        uint256 _startTimestamp,
        uint256 _endTimestamp
    ) external {
        require(msg.sender == owner, "addNewProject: Caller is not the owner");
        require(
            bytes(_name).length > 0,
            "addNewProject: Project name cannot be empty string."
        );
        require(
            _startTimestamp >= block.timestamp,
            "addNewProject: startTimestamp is less than the current block timestamp."
        );
        require(
            _startTimestamp < _endTimestamp,
            "addNewProject: startTimestamp is greater than or equal to the endTimestamp."
        );
        require(
            !isProjectNameTaken[_name],
            "addNewProject: project name already taken."
        );

        Project memory project;
        project.name = _name;
        project.startTimestamp = _startTimestamp;
        project.endTimestamp = _endTimestamp;
        project.numberOfPools = 0;
        project.totalAmountStaked = 0;

        uint256 projectsLength = projects.length;
        projects.push(project);
        projectNameToProjectId[_name] = projectsLength;
        isProjectNameTaken[_name] = true;

        emit ProjectAdded(projectsLength, _name);
    }

    function addStakingPool(
        uint256 _projectId,
        uint256 _maxStakingAmountPerUser
    ) external {
        require(
            msg.sender == owner,
            "addStakingPool: Caller is not the owner."
        );
        require(
            _projectId < projects.length,
            "addStakingPool: Invalid project ID."
        );

        StakingPool memory stakingPool;
        stakingPool.maxStakingAmountPerUser = _maxStakingAmountPerUser;
        stakingPool.totalAmountStaked = 0;

        uint256 numberOfPoolsInProject = projects[_projectId].numberOfPools;
        stakingPoolInfo[_projectId][numberOfPoolsInProject] = stakingPool;
        projects[_projectId].numberOfPools =
            projects[_projectId].numberOfPools +
            1;

        emit PoolAdded(_projectId, projects[_projectId].numberOfPools);
    }

    function disableProject(uint256 _projectId) external {
        require(msg.sender == owner, "disableProject: Caller is not the owner");
        require(
            _projectId < projects.length,
            "disableProject: Invalid project ID."
        );

        projects[_projectId].endTimestamp = block.timestamp;

        emit ProjectDisabled(_projectId);
    }

    function deposit(
        uint256 _projectId,
        uint256 _poolId,
        uint256 _amount
    ) external nonReentrant {
        require(_amount > 0, "deposit: Amount not specified.");
        require(_projectId < projects.length, "deposit: Invalid project ID.");
        require(
            _poolId < projects[_projectId].numberOfPools,
            "deposit: Invalid pool ID."
        );
        require(
            block.timestamp <= projects[_projectId].endTimestamp,
            "deposit: Staking no longer permitted for this project."
        );
        require(
            block.timestamp >= projects[_projectId].startTimestamp,
            "deposit: Staking is not yet permitted for this project."
        );

        uint256 _userStakedAmount = userStakedAmount[_projectId][_poolId][
            msg.sender
        ];
        if (stakingPoolInfo[_projectId][_poolId].maxStakingAmountPerUser > 0) {
            require(
                _userStakedAmount.add(_amount) <=
                    stakingPoolInfo[_projectId][_poolId]
                        .maxStakingAmountPerUser,
                "deposit: Cannot exceed max staking amount per user."
            );
        }

        if (userStakedAmount[_projectId][_poolId][msg.sender] == 0) {
            stakingPoolInfo[_projectId][_poolId].usersStaked.push(msg.sender);
        }

        projects[_projectId].totalAmountStaked = projects[_projectId]
            .totalAmountStaked
            .add(_amount);

        stakingPoolInfo[_projectId][_poolId]
            .totalAmountStaked = stakingPoolInfo[_projectId][_poolId]
            .totalAmountStaked
            .add(_amount);

        userStakedAmount[_projectId][_poolId][msg.sender] = userStakedAmount[
            _projectId
        ][_poolId][msg.sender].add(_amount);

        stakingToken.safeTransferFrom(
            address(msg.sender),
            address(this),
            _amount
        );

        emit Deposit(msg.sender, _projectId, _poolId, _amount);
    }

    function withdraw(uint256 _projectId, uint256 _poolId)
        external
        nonReentrant
    {
        require(_projectId < projects.length, "withdraw: Invalid project ID.");
        require(
            _poolId < projects[_projectId].numberOfPools,
            "withdraw: Invalid pool ID."
        );
        require(
            block.timestamp > projects[_projectId].endTimestamp,
            "withdraw: Not yet permitted."
        );
        require(
            !didUserWithdrawFunds[_projectId][_poolId][msg.sender],
            "withdraw: User has already withdrawn funds for this pool."
        );

        uint256 _userStakedAmount = userStakedAmount[_projectId][_poolId][
            msg.sender
        ];
        require(_userStakedAmount > 0, "withdraw: No stake to withdraw.");
        didUserWithdrawFunds[_projectId][_poolId][msg.sender] = true;

        stakingToken.safeTransfer(msg.sender, _userStakedAmount);

        emit Withdraw(msg.sender, _projectId, _poolId, _userStakedAmount);
    }

    function getTotalStakingInfoForProjectPerPool(
        uint256 _projectId,
        uint256 _poolId,
        uint256 _pageNumber,
        uint256 _pageSize
    ) external view returns (UserInfo[] memory) {
        require(
            msg.sender == owner,
            "getTotalStakingInfoForProjectPerPool: Caller is not the owner."
        );
        require(
            _projectId < projects.length,
            "getTotalStakingInfoForProjectPerPool: Invalid project ID."
        );
        require(
            _poolId < projects[_projectId].numberOfPools,
            "getTotalStakingInfoForProjectPerPool: Invalid pool ID."
        );
        uint256 _usersStakedInPool = stakingPoolInfo[_projectId][_poolId]
            .usersStaked
            .length;
        require(
            _usersStakedInPool > 0,
            "getTotalStakingInfoForProjectPerPool: Nobody staked in this pool."
        );
        require(
            _pageSize > 0,
            "getTotalStakingInfoForProjectPerPool: Invalid page size."
        );
        require(
            _pageNumber > 0,
            "getTotalStakingInfoForProjectPerPool: Invalid page number."
        );
        uint256 _startIndex = _pageNumber.sub(1).mul(_pageSize);

        if (_pageNumber > 1) {
            require(
                _startIndex < _usersStakedInPool,
                "getTotalStakingInfoForProjectPerPool: Specified parameters exceed number of users in the pool."
            );
        }

        uint256 _endIndex = _pageNumber.mul(_pageSize);
        if (_endIndex > _usersStakedInPool) {
            _endIndex = _usersStakedInPool;
        }

        UserInfo[] memory _result = new UserInfo[](_endIndex.sub(_startIndex));
        uint256 _resultIndex = 0;

        for (uint256 i = _startIndex; i < _endIndex; i++) {
            UserInfo memory _userInfo;
            _userInfo.userAddress = stakingPoolInfo[_projectId][_poolId]
                .usersStaked[i];
            _userInfo.poolId = _poolId;
            _userInfo
                .percentageOfTokensStakedInPool = getPercentageAmountStakedByUserInPool(
                _projectId,
                _poolId,
                _userInfo.userAddress
            );

            _userInfo.amountOfTokensStakedInPool = getAmountStakedByUserInPool(
                _projectId,
                _poolId,
                _userInfo.userAddress
            );

            _result[_resultIndex] = _userInfo;
            _resultIndex = _resultIndex + 1;
        }

        return _result;
    }

    function numberOfProjects() external view returns (uint256) {
        return projects.length;
    }

    function numberOfPools(uint256 _projectId) external view returns (uint256) {
        require(
            _projectId < projects.length,
            "numberOfPools: Invalid project ID."
        );
        return projects[_projectId].numberOfPools;
    }

    function getTotalAmountStakedInProject(uint256 _projectId)
        external
        view
        returns (uint256)
    {
        require(
            _projectId < projects.length,
            "getTotalAmountStakedInProject: Invalid project ID."
        );

        return projects[_projectId].totalAmountStaked;
    }

    function getTotalAmountStakedInPool(uint256 _projectId, uint256 _poolId)
        external
        view
        returns (uint256)
    {
        require(
            _projectId < projects.length,
            "getTotalAmountStakedInPool: Invalid project ID."
        );
        require(
            _poolId < projects[_projectId].numberOfPools,
            "getTotalAmountStakedInPool: Invalid pool ID."
        );

        return stakingPoolInfo[_projectId][_poolId].totalAmountStaked;
    }

    function getAmountStakedByUserInPool(
        uint256 _projectId,
        uint256 _poolId,
        address _address
    ) public view returns (uint256) {
        require(
            _projectId < projects.length,
            "getAmountStakedByUserInPool: Invalid project ID."
        );
        require(
            _poolId < projects[_projectId].numberOfPools,
            "getAmountStakedByUserInPool: Invalid pool ID."
        );

        return userStakedAmount[_projectId][_poolId][_address];
    }

    function getPercentageAmountStakedByUserInPool(
        uint256 _projectId,
        uint256 _poolId,
        address _address
    ) public view returns (uint256) {
        require(
            _projectId < projects.length,
            "getPercentageAmountStakedByUserInPool: Invalid project ID."
        );
        require(
            _poolId < projects[_projectId].numberOfPools,
            "getPercentageAmountStakedByUserInPool: Invalid pool ID."
        );

        return
            userStakedAmount[_projectId][_poolId][_address].mul(1e8).div(
                stakingPoolInfo[_projectId][_poolId].totalAmountStaked
            );
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/math/SafeMath.sol)

pragma solidity ^0.8.0;

// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.

/**
 * @dev Wrappers over Solidity's arithmetic operations.
 *
 * NOTE: `SafeMath` is generally not needed starting with Solidity 0.8, since the compiler
 * now has built in overflow checking.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            uint256 c = a + b;
            if (c < a) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the substraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b > a) return (false, 0);
            return (true, a - b);
        }
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
            // benefit is lost if 'b' is also tested.
            // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
            if (a == 0) return (true, 0);
            uint256 c = a * b;
            if (c / a != b) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a / b);
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a % b);
        }
    }

    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        return a + b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return a - b;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        return a * b;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator.
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return a % b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b <= a, errorMessage);
            return a - b;
        }
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a / b;
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a % b;
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (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 making 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
// OpenZeppelin Contracts v4.4.1 (token/ERC20/utils/SafeERC20.sol)

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
// OpenZeppelin Contracts v4.4.1 (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);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (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;
        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);
            }
        }
    }
}

{
  "optimizer": {
    "enabled": true,
    "runs": 300
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[{"internalType":"contract IERC20","name":"_stakingToken","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"_user","type":"address"},{"indexed":true,"internalType":"uint256","name":"_projectId","type":"uint256"},{"indexed":true,"internalType":"uint256","name":"_poolId","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"Deposit","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"_projectId","type":"uint256"},{"indexed":true,"internalType":"uint256","name":"_poolId","type":"uint256"}],"name":"PoolAdded","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"_projectId","type":"uint256"},{"indexed":false,"internalType":"string","name":"_projectName","type":"string"}],"name":"ProjectAdded","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"_projectId","type":"uint256"}],"name":"ProjectDisabled","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"_user","type":"address"},{"indexed":true,"internalType":"uint256","name":"_projectId","type":"uint256"},{"indexed":true,"internalType":"uint256","name":"_poolId","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"Withdraw","type":"event"},{"inputs":[{"internalType":"string","name":"_name","type":"string"},{"internalType":"uint256","name":"_startTimestamp","type":"uint256"},{"internalType":"uint256","name":"_endTimestamp","type":"uint256"}],"name":"addProject","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_projectId","type":"uint256"},{"internalType":"uint256","name":"_maxStakingAmountPerUser","type":"uint256"}],"name":"addStakingPool","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_projectId","type":"uint256"},{"internalType":"uint256","name":"_poolId","type":"uint256"},{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"deposit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"address","name":"","type":"address"}],"name":"didUserWithdrawFunds","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_projectId","type":"uint256"}],"name":"disableProject","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_projectId","type":"uint256"},{"internalType":"uint256","name":"_poolId","type":"uint256"},{"internalType":"address","name":"_address","type":"address"}],"name":"getAmountStakedByUserInPool","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_projectId","type":"uint256"},{"internalType":"uint256","name":"_poolId","type":"uint256"},{"internalType":"address","name":"_address","type":"address"}],"name":"getPercentageAmountStakedByUserInPool","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_projectId","type":"uint256"},{"internalType":"uint256","name":"_poolId","type":"uint256"}],"name":"getTotalAmountStakedInPool","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_projectId","type":"uint256"}],"name":"getTotalAmountStakedInProject","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_projectId","type":"uint256"},{"internalType":"uint256","name":"_poolId","type":"uint256"},{"internalType":"uint256","name":"_pageNumber","type":"uint256"},{"internalType":"uint256","name":"_pageSize","type":"uint256"}],"name":"getTotalStakingInfoForProjectPerPool","outputs":[{"components":[{"internalType":"address","name":"userAddress","type":"address"},{"internalType":"uint256","name":"poolId","type":"uint256"},{"internalType":"uint256","name":"percentageOfTokensStakedInPool","type":"uint256"},{"internalType":"uint256","name":"amountOfTokensStakedInPool","type":"uint256"}],"internalType":"struct LatticeStakingPool.UserInfo[]","name":"","type":"tuple[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"","type":"string"}],"name":"isProjectNameTaken","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_projectId","type":"uint256"}],"name":"numberOfPools","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"numberOfProjects","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"","type":"string"}],"name":"projectNameToProjectId","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"projects","outputs":[{"internalType":"string","name":"name","type":"string"},{"internalType":"uint256","name":"totalAmountStaked","type":"uint256"},{"internalType":"uint256","name":"numberOfPools","type":"uint256"},{"internalType":"uint256","name":"startTimestamp","type":"uint256"},{"internalType":"uint256","name":"endTimestamp","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"uint256","name":"","type":"uint256"}],"name":"stakingPoolInfo","outputs":[{"internalType":"uint256","name":"maxStakingAmountPerUser","type":"uint256"},{"internalType":"uint256","name":"totalAmountStaked","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"stakingToken","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"address","name":"","type":"address"}],"name":"userStakedAmount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_projectId","type":"uint256"},{"internalType":"uint256","name":"_poolId","type":"uint256"}],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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000000000000000000000000a393473d64d2f9f026b60b6df7859a689715d092

-----Decoded View---------------
Arg [0] : _stakingToken (address): 0xa393473d64d2F9F026B60b6Df7859A689715d092

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 000000000000000000000000a393473d64d2f9f026b60b6df7859a689715d092