// SPDX-License-Identifier: MIT
// 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);
            }
        }
    }
}

// SPDX-License-Identifier: MIT
// 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;
    }
}

// SPDX-License-Identifier: MIT
// 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);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/math/Math.sol)

pragma solidity ^0.8.0;

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

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

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

    /**
     * @dev Returns the ceiling of the division of two numbers.
     *
     * This differs from standard division with `/` in that it rounds up instead
     * of rounding down.
     */
    function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b - 1) / b can overflow on addition, so we distribute.
        return a / b + (a % b == 0 ? 0 : 1);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)

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() {
        _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);
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.11;

import "./StakingManager.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";

/// @title Efforce farming pool for WOZX token
/// @author Ackee Blockchain
/// @notice Contract holds information about users deposit amounts and deposit times
contract Pool {
    using SafeERC20 for IERC20;

    struct Deposit {
        uint256 amount;
        uint256 depositTime;
    }

    StakingManager public manager;
    uint8 public immutable id;
    mapping(address => Deposit[]) public deposits;

    modifier onlyManager() {
        require(msg.sender == address(manager), "Unauthorized");
        _;
    }

    /// @param _id ID of the pool (0 = whole campaign, 1 = 1 month, 2 = 3 months, 3 = 6 months)
    /// @param _manager Staking manager contract address
    constructor(uint8 _id, address _manager) {
        require(_id < 4, "Invalid pool ID");
        require(
            StakingManager(_manager).CONTRACT_TYPE() == keccak256("Efforce Staking Manager"),
            "Not a Efforce Staking Manager"
        );
        id = _id;
        manager = StakingManager(_manager);
    }

    function getTimePeriod() public view returns (uint256) {
        if (id == 1) {
            return 2_592_000;
        } else if (id == 2) {
            return 7_776_000;
        } else if (id == 3) {
            return 15_552_000;
        } else {
            return 0;
        }
    }

    /// @notice Deposits WOZX tokens and save deposit amount and deposit time
    /// @param account Users's address
    /// @param amount Amount to deposit
    function deposit(address account, uint256 amount) external onlyManager {
        require(
            block.timestamp < manager.getCampaignEnd(),
            "Campaign ended, can't deposit"
        );
        uint256 timePeriod = getTimePeriod();
        if (deposits[account].length == 0) {
            // User joining the pool
            require(
                block.timestamp + manager.BUFFER_PERIOD() + timePeriod < manager.getCampaignEnd(),
                "Too late to join this pool"
            );
            deposits[account].push(
                Deposit(amount, block.timestamp + manager.BUFFER_PERIOD())
            );
        } else if (block.timestamp < deposits[account][0].depositTime) {
            // User is in buffering period
            deposits[account].push(
                Deposit(amount, deposits[account][0].depositTime)
            );
        } else {
            // User is staking
            if (timePeriod != 0) {
                require(
                    block.timestamp < getStartTime(account) + timePeriod,
                    "Can't deposit after the pool period"
                );
            }
            deposits[account].push(Deposit(amount, block.timestamp));
        }
    }

    /// @notice Withdraws deposited tokens from this pool and delete deposit records
    /// @param account User's address
    /// @return totalWithdraw sum of the user's all deposit amounts
    function withdraw(address account) external onlyManager returns (uint256 totalWithdraw) {
        totalWithdraw = balanceOf(account);
        delete deposits[account];
        manager.wozxToken().safeTransfer(account, totalWithdraw);
        return totalWithdraw;
    }

    /// @notice Returns array of the deposits containing deposit amount and deposit time
    /// @param account User's address
    /// @return Array [] of Deposit structures
    function getDeposits(address account) external view returns (Deposit[] memory) {
        return deposits[account];
    }

    /// @notice Returns sum of the user's all deposit amounts
    /// @param account User's address
    /// @return sum of the user's deposits
    function balanceOf(address account) public view returns (uint256 sum) {
        for (uint256 i = 0; i < deposits[account].length; i++) {
            sum += deposits[account][i].amount;
        }
        return sum;
    }

    /// @notice Returns time of user's first deposit
    /// @param account User's address
    /// @return Timestamp (uint256)
    function getStartTime(address account) public view returns (uint256) {
        require(deposits[account].length > 0, "Unknown address");
        return deposits[account][0].depositTime;
    }

    /// @notice Returns end time of user's staking period
    /// @param account User's address
    /// @return Timestamp (uint256)
    function getEndTime(address account) public view returns (uint256) {
        require(deposits[account].length > 0, "Unknown address");
        return
            id == 0
                ? manager.getCampaignEnd()
                : (getStartTime(account) + getTimePeriod());
    }

    /// @notice Returns elapsed time of the staking period. If still in buffering period, returns negative number (remaining buffering time)
    /// @param account User's address
    /// @return elapsed time of the staking period or negative number if is in buffering period
    function getElapsedTime(address account) public view returns (int256) {
        require(deposits[account].length > 0, "Unknown address");
        return int256(block.timestamp) - int256(getStartTime(account));
    }

    /// @notice Returns true when user is in buffering period
    /// @param account User's address
    /// @return Buffering period bool
    function isInBufferingPeriod(address account) external view returns (bool) {
        return getElapsedTime(account) < 0;
    }

    /// @notice Returns true when user's staking period is over
    /// @param account User's address
    /// @return Staking finished bool
    function isStakingFinished(address account) external view returns (bool) {
        return block.timestamp > getEndTime(account);
    }
}

// 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

pragma solidity ^0.8.11;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/utils/math/Math.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "./Pool.sol";

/// @title Efforce staking manager is the contract for managing the farming pools
/// @author Ackee Blockchain
/// @notice Staking manager contracts handles 4 staking pools with different staking periods
contract StakingManager is Ownable {
    using SafeERC20 for IERC20;

    struct PoolInfo {
        address payable addr;
        uint256 totalRewards;
        uint256 rewardPerMinute;
        uint256 claimedRewards;
        mapping(address => uint256) lastRewardsClaim;
    }

    bytes32 public constant CONTRACT_TYPE = keccak256("Efforce Staking Manager");
    uint256 public constant CAMPAIGN_PERIOD = 365 days;
    uint256 public constant BUFFER_PERIOD = 3 days;
    IERC20 public immutable wozxToken; // 0x34950ff2b487d9e5282c5ab342d08a2f712eb79f;
    PoolInfo[4] public pools;
    uint256 public campaignStart;

    event PoolBalanceChanged(uint8 indexed poolId, uint256 totalPoolAmount);
    event UserBalanceChanged(address indexed account, uint8 indexed poolId, uint256 totalUserDeposits);

    modifier isInitialized() {
        require(campaignStart != 0, "Not initialized");
        _;
    }

    constructor(IERC20 _wozxToken) {
        require(address(_wozxToken) != address(0), "Unexpected zero address");
        wozxToken = _wozxToken;
    }

    /// @dev Set pools addresses and start the whole campaign
    /// @param poolGlobal address of whole campaign pool
    /// @param pool1Month address of 1 month pool
    /// @param pool3Months address of 3 months pool
    /// @param pool6Months address of 6 months pool
    function init(
        address payable poolGlobal,
        address payable pool1Month,
        address payable pool3Months,
        address payable pool6Months
    ) external onlyOwner {
        require(campaignStart == 0, "Pools are already initialized");
        require(Pool(poolGlobal).id() == 0, "Pool 0 id mismatch");
        require(Pool(pool1Month).id() == 1, "Pool 1 id mismatch");
        require(Pool(pool3Months).id() == 2, "Pool 2 id mismatch");
        require(Pool(pool6Months).id() == 3, "Pool 3 id mismatch");
        require(
            address(Pool(poolGlobal).manager()) == address(this),
            "Pool 0 manager mismatch"
        );
        require(
            address(Pool(pool1Month).manager()) == address(this),
            "Pool 1 manager mismatch"
        );
        require(
            address(Pool(pool3Months).manager()) == address(this),
            "Pool 2 manager mismatch"
        );
        require(
            address(Pool(pool6Months).manager()) == address(this),
            "Pool 3 manager mismatch"
        );
        require(
            wozxToken.balanceOf(address(this)) >= 13_140_000e18,
            "Rewards not ready"
        );

        pools[0].addr = poolGlobal;
        pools[0].totalRewards = 5_256_000;
        pools[0].rewardPerMinute = 10e18;

        pools[1].addr = pool1Month;
        pools[1].totalRewards = 108_000;
        pools[1].rewardPerMinute = 25e17;

        pools[2].addr = pool3Months;
        pools[2].totalRewards = 648_000;
        pools[2].rewardPerMinute = 5e18;

        pools[3].addr = pool6Months;
        pools[3].totalRewards = 1_944_000;
        pools[3].rewardPerMinute = 75e17;

        campaignStart = block.timestamp;
    }

    /// @notice Deposits WOZX tokens to the given pool. Min deposit is 100 WOZX, max deposit is 200 000 WOZX
    /// @param poolId Id of the pool
    /// @param amount Amount to deposit
    function deposit(uint8 poolId, uint256 amount) external isInitialized {
        Pool p = Pool(pools[poolId].addr);
        require(amount >= 100e18, "Minimum deposit = 100 WOZX");
        require(
            p.balanceOf(msg.sender) + amount <= 200_000e18,
            "Maximum deposit = 200 000 WOZX"
        );
        
        p.deposit(msg.sender, amount);
        wozxToken.safeTransferFrom(msg.sender, pools[poolId].addr, amount);

        emit PoolBalanceChanged(poolId, wozxToken.balanceOf(pools[poolId].addr));
        emit UserBalanceChanged(msg.sender, poolId, p.balanceOf(msg.sender));
    }

    /// @notice Withdraws deposited tokens from the given pool + rewards
    /// @param poolId Id of the pool
    function withdraw(uint8 poolId) external isInitialized {
        Pool p = Pool(pools[poolId].addr);
        require(
            block.timestamp < p.getStartTime(msg.sender) ||
                block.timestamp > p.getEndTime(msg.sender),
            "Can't withdraw during the staking"
        );
        
        claimReward(poolId);
        p.withdraw(msg.sender);

        emit PoolBalanceChanged(poolId, wozxToken.balanceOf(pools[poolId].addr));
        emit UserBalanceChanged(msg.sender, poolId, p.balanceOf(msg.sender));
    }

    /// @notice Withdraws earned rewards from the pool
    /// @param poolId Id of the pool
    function claimReward(uint8 poolId) public isInitialized {
        Pool p = Pool(pools[poolId].addr);
        Pool.Deposit[] memory deposits = p.getDeposits(msg.sender);
        require(deposits.length > 0, "You have no deposits");
        
        uint256 reward = getReward(poolId);
        pools[poolId].lastRewardsClaim[msg.sender] = Math.min(
            block.timestamp,
            p.getEndTime(msg.sender)
        );
        if (reward > 0) {
            pools[poolId].claimedRewards += reward;
            wozxToken.safeTransfer(msg.sender, reward);
        }

        emit UserBalanceChanged(msg.sender, poolId, p.balanceOf(msg.sender));
    }

    /// @notice Returns how much rewards have been already claimed from the pool
    /// @param poolId Id of the pool
    /// @return uint256
    function getClaimedRewards(uint8 poolId) external view returns (uint256) {
        return pools[poolId].claimedRewards;
    }

    /// @notice Returns how much time has passed from campaign start (in minutes)
    /// @return uint256
    function getCampaignElapsedMinutes() public view returns (uint256) {
        return Math.min((block.timestamp - campaignStart), CAMPAIGN_PERIOD) / 60;
    }

    /// @notice Returns campaign end
    /// @return Timestamp (uint256)
    function getCampaignEnd() public view returns (uint256) {
        return campaignStart + CAMPAIGN_PERIOD;
    }

    /// @notice Returns available rewards in the pool
    /// @param poolId Id of the pool
    /// @return uint256
    function getAvailableRewards(uint8 poolId) public view returns (uint256) {
        return
            (getCampaignElapsedMinutes() * pools[poolId].rewardPerMinute) -
            pools[poolId].claimedRewards;
    }

    /// @notice Returns reward calculated by formula for the given pool and the message sender based on the deposits time
    /// @param poolId Id of the pool
    /// @return uint256
    function getReward(uint8 poolId) public view returns (uint256) {
        Pool p = Pool(pools[poolId].addr);
        Pool.Deposit[] memory deposits = p.getDeposits(msg.sender);
        if (deposits.length == 0 || block.timestamp <= deposits[0].depositTime) {
            return 0;
        }
        uint256 stakingEnd = Math.min(
            p.getEndTime(msg.sender),
            block.timestamp
        );
        uint256 totalDeposits = wozxToken.balanceOf(pools[poolId].addr);
        uint256 availableRewardPerMinute = getAvailableRewards(poolId) /
            ((p.id() == 0 ? CAMPAIGN_PERIOD : p.getTimePeriod()) / 60);

        uint256 reward;
        for (uint256 i = 0; i < deposits.length; i++) {
            uint256 depositElapsedMinutes = (stakingEnd -
                Math.max(
                    deposits[i].depositTime,
                    pools[poolId].lastRewardsClaim[msg.sender]
                )) / 60;
            reward +=
                (availableRewardPerMinute *
                    depositElapsedMinutes *
                    deposits[i].amount) /
                totalDeposits;
        }
        return reward;
    }

    /// @notice Witdraws remaining rewards, afer 1 year reward claiming period after the campaign end
    /// @param account Address of recipient
    function withdrawRemainingRewards(address account) external isInitialized onlyOwner {
        require(
            getCampaignEnd() + 365 days < block.timestamp,
            "Remaining rewards can be withdrawn a year after the campaign end"
        );
        wozxToken.safeTransfer(account, wozxToken.balanceOf(address(this)));
    }
}

{
  "compilationTarget": {
    "contracts/StakingManager.sol": "StakingManager"
  },
  "evmVersion": "london",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": false,
    "runs": 200
  },
  "remappings": []
}