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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.10;
pragma abicoder v2;

import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
import {IERC20Metadata} from "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol";

import "./V2Wrapper.sol";

contract V2WrapperFactory is Ownable {
    event NewWrapperContract(address indexed wrapper, address indexed stakedToken, address indexed rewardToken, uint256 rewardPerSecond, uint256 startTimestamp, uint256 endTimestamp);

    constructor() {
        //
    }

    /*
     * @notice Deploy the pool
     * @param _stakedToken: staked token address
     * @param _rewardToken: reward token address
     * @param _rewardPerSecond: reward per second (in rewardToken)
     * @param _startTimestamp: start block timestamp
     * @param _endTimestamp: end block timestamp
     * @param _admin: admin address with ownership
     * @param _boostContract: boost contract address
     * @return address of new smart chef contract
     */
    function deployPool(
        IERC20Metadata _stakedToken,
        IERC20Metadata _rewardToken,
        uint256 _rewardPerSecond,
        uint256 _startTimestamp,
        uint256 _endTimestamp,
        address _admin,
        address _boostContract
    ) external onlyOwner {
        require(_stakedToken.totalSupply() >= 0);
        require(_rewardToken.totalSupply() >= 0);
        require(_stakedToken != _rewardToken, "Tokens must be different");

        bytes memory bytecode = type(V2Wrapper).creationCode;
        bytes32 salt = keccak256(abi.encodePacked(_stakedToken, _rewardToken, _startTimestamp));
        address wrapperAddress;

        assembly {
            wrapperAddress := create2(0, add(bytecode, 32), mload(bytecode), salt)
        }

        V2Wrapper(wrapperAddress).initialize(
            _stakedToken,
            _rewardToken,
            _rewardPerSecond,
            _startTimestamp,
            _endTimestamp,
            _admin,
            _boostContract
        );

        emit NewWrapperContract(
            wrapperAddress,
            address(_stakedToken),
            address(_rewardToken),
            _rewardPerSecond,
            _startTimestamp,
            _endTimestamp
        );
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (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 Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby disabling 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
// OpenZeppelin Contracts (last updated v4.9.0) (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() {
        _nonReentrantBefore();
        _;
        _nonReentrantAfter();
    }

    function _nonReentrantBefore() private {
        // On the first call to nonReentrant, _status will be _NOT_ENTERED
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

        // Any calls to nonReentrant after this point will fail
        _status = _ENTERED;
    }

    function _nonReentrantAfter() private {
        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
     * `nonReentrant` function in the call stack.
     */
    function _reentrancyGuardEntered() internal view returns (bool) {
        return _status == _ENTERED;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";

/**
 * @dev Interface for the optional metadata functions from the ERC20 standard.
 *
 * _Available since v4.1._
 */
interface IERC20Metadata is IERC20 {
    /**
     * @dev Returns the name of the token.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the symbol of the token.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the decimals places of the token.
     */
    function decimals() external view returns (uint8);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/extensions/IERC20Permit.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
 * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
 *
 * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
 * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
 * need to send a transaction, and thus is not required to hold Ether at all.
 */
interface IERC20Permit {
    /**
     * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
     * given ``owner``'s signed approval.
     *
     * IMPORTANT: The same issues {IERC20-approve} has related to transaction
     * ordering also apply here.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `deadline` must be a timestamp in the future.
     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
     * over the EIP712-formatted function arguments.
     * - the signature must use ``owner``'s current nonce (see {nonces}).
     *
     * For more information on the signature format, see the
     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
     * section].
     */
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

    /**
     * @dev Returns the current nonce for `owner`. This value must be
     * included whenever a signature is generated for {permit}.
     *
     * Every successful call to {permit} increases ``owner``'s nonce by one. This
     * prevents a signature from being used multiple times.
     */
    function nonces(address owner) external view returns (uint256);

    /**
     * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
     */
    // solhint-disable-next-line func-name-mixedcase
    function DOMAIN_SEPARATOR() external view returns (bytes32);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @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);

    /**
     * @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);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.3) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";
import "../extensions/IERC20Permit.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;

    /**
     * @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeTransfer(IERC20 token, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    /**
     * @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the
     * calling contract. If `token` returns no value, non-reverting calls are assumed to be successful.
     */
    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));
    }

    /**
     * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 oldAllowance = token.allowance(address(this), spender);
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance + value));
    }

    /**
     * @dev Decrease the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    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");
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance - value));
        }
    }

    /**
     * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval
     * to be set to zero before setting it to a non-zero value, such as USDT.
     */
    function forceApprove(IERC20 token, address spender, uint256 value) internal {
        bytes memory approvalCall = abi.encodeWithSelector(token.approve.selector, spender, value);

        if (!_callOptionalReturnBool(token, approvalCall)) {
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, 0));
            _callOptionalReturn(token, approvalCall);
        }
    }

    /**
     * @dev Use a ERC-2612 signature to set the `owner` approval toward `spender` on `token`.
     * Revert on invalid signature.
     */
    function safePermit(
        IERC20Permit token,
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal {
        uint256 nonceBefore = token.nonces(owner);
        token.permit(owner, spender, value, deadline, v, r, s);
        uint256 nonceAfter = token.nonces(owner);
        require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed");
    }

    /**
     * @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");
        require(returndata.length == 0 || abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
    }

    /**
     * @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).
     *
     * This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead.
     */
    function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) {
        // 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 cannot use {Address-functionCall} here since this should return false
        // and not revert is the subcall reverts.

        (bool success, bytes memory returndata) = address(token).call(data);
        return
            success && (returndata.length == 0 || abi.decode(returndata, (bool))) && Address.isContract(address(token));
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (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
     *
     * Furthermore, `isContract` will also return true if the target contract within
     * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
     * which only has an effect at the end of a transaction.
     * ====
     *
     * [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://consensys.net/diligence/blog/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/v0.8.0/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 functionCallWithValue(target, data, 0, "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");
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, 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) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, 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) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
     * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
     *
     * _Available since v4.8._
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        if (success) {
            if (returndata.length == 0) {
                // only check isContract if the call was successful and the return data is empty
                // otherwise we already know that it was a contract
                require(isContract(target), "Address: call to non-contract");
            }
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    /**
     * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason or 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 {
            _revert(returndata, errorMessage);
        }
    }

    function _revert(bytes memory returndata, string memory errorMessage) private pure {
        // 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
            /// @solidity memory-safe-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
pragma solidity ^0.8.19;

interface IFarmBooster {
    function updatePositionBoostMultiplier(address user) external returns (uint256 _multiplier);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.10;
pragma abicoder v2;

import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
import {ReentrancyGuard} from "@openzeppelin/contracts/security/ReentrancyGuard.sol";

import {IERC20Metadata} from "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol";
import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";

// need to call FarmBooster
import "../interfaces/IFarmBooster.sol";

contract V2Wrapper is Ownable, ReentrancyGuard {
    using SafeERC20 for IERC20Metadata;
    using SafeERC20 for IERC20;

    // The address of the wrapper factory
    address public immutable WRAPPER_FACTORY;

    // Whether it is initialized
    bool public isInitialized;

    // Accrued token per share
    uint256 public accTokenPerShare;

    // The timestamp when reward token mining starts
    uint256 public startTimestamp;

    // The timestamp when reward token mining ends
    uint256 public endTimestamp;

    // The timestamp of the last reward token update
    uint256 public lastRewardTimestamp;

    // reward tokens created per second
    uint256 public rewardPerSecond;

    // The precision factor
    uint256 public PRECISION_FACTOR;

    // The staked token
    IERC20Metadata public stakedToken;

    // The reward token
    IERC20Metadata public rewardToken;

    // The contract handles the share boosts.
    address public boostContract;

    // The total boosted share
    uint256 public totalBoostedShare;

    // Basic boost factor, none boosted user's boost factor
    uint256 public constant BOOST_PRECISION = 100 * 1e10;
    // Hard limit for maximum boost factor, it must greater than BOOST_PRECISION
    uint256 public constant MAX_BOOST_PRECISION = 300 * 1e10;

    // Info of each user that stakes tokens (stakedToken)
    mapping(address => UserInfo) public userInfo;

    struct UserInfo {
        uint256 amount; // How many staked tokens the user has provided
        uint256 rewardDebt;
        uint256 boostMultiplier; // currently active multiplier
        uint256 boostedAmount; // combined boosted amount
        uint256 unsettledRewards; // rewards haven't been transferred to users but already accounted in rewardDebt
    }

    event Deposit(address indexed user, uint256 amount);
    event EmergencyWithdraw(address indexed user, uint256 amount);
    event NewStartAndEndTimestamp(uint256 oldStartTimestamp, uint256 newStartTimestamp, uint256 oldEndTimestamp, uint256 newEndTimestamp, uint256 rewardPerSecond);
    event Restart(uint256 startTimestamp, uint256 endTimestamp, uint256 rewardPerSecond);
    event NewRewardPerSecond(uint256 oldRewardPerSecond, uint256 newRewardPerSecond, uint256 startTimestamp, uint256 endTimestamp);
    event NewPoolLimit(uint256 poolLimitPerUser);
    event RewardsStop(uint256 blockNumber);
    event TokenRecovery(address indexed token, uint256 amount);
    event Withdraw(address indexed user, uint256 amount);
    event DepositAndExpend(address indexed user, uint256 amount, uint256 endTimestamp);
    event BoostContractUpdated(address indexed boostContract);
    event BoostMultiplierUpdated(address indexed user, uint256 oldMultiplier, uint256 newMultiplier);


    /**
     * @notice Constructor
     */
    constructor() {
        WRAPPER_FACTORY = msg.sender;
    }

    /**
     * @dev Throws if caller is not the boost contract.
     */
    modifier onlyBoostContract() {
        require(boostContract == msg.sender, "Ownable: caller is not the boost contract");
        _;
    }

    /*
     * @notice Initialize the contract
     * @param _stakedToken: staked token address
     * @param _rewardToken: reward token address
     * @param _rewardPerSecond: reward per second (in rewardToken)
     * @param _startTimestamp: start timestamp
     * @param _endTimestamp: end timestamp
     * @param _admin: admin address with ownership
     */
    function initialize(
        IERC20Metadata _stakedToken,
        IERC20Metadata _rewardToken,
        uint256 _rewardPerSecond,
        uint256 _startTimestamp,
        uint256 _endTimestamp,
        address _admin,
	address _boostContract
    ) external {
        require(!isInitialized, "Already initialized");
        require(msg.sender == WRAPPER_FACTORY, "Not factory");
        require(_startTimestamp < _endTimestamp, "New startTimestamp must be lower than new endTimestamp");
        require(block.timestamp < _startTimestamp, "New startTimestamp must be higher than current timestamp");

        // Make this contract initialized
        isInitialized = true;

        stakedToken = _stakedToken;
        rewardToken = _rewardToken;
        rewardPerSecond = _rewardPerSecond;
        startTimestamp = _startTimestamp;
        endTimestamp = _endTimestamp;
	boostContract = _boostContract;

        uint256 decimalsRewardToken = uint256(rewardToken.decimals());
        require(decimalsRewardToken < 30, "Must be inferior to 30");

        PRECISION_FACTOR = uint256(10**(uint256(30) - decimalsRewardToken));
        require(PRECISION_FACTOR * rewardPerSecond / (10**decimalsRewardToken) >= 10_000_000, "rewardPerSecond must be larger");

        // Set the lastRewardBlock as the startTimestamp
        lastRewardTimestamp = startTimestamp;

        // Transfer ownership to the admin address who becomes owner of the contract
        transferOwnership(_admin);
    }

    /*
     * @notice Deposit staked tokens and collect reward tokens (if any)
     * @param _amount: amount to deposit (in stakeToken)
     * @param _noHarvest: flag for harvest or not
     */
    function deposit(uint256 _amount, bool _noHarvest) external nonReentrant {
        UserInfo storage user = userInfo[msg.sender];

        // always update pool to be safe
	_updatePool();

        if (user.amount > 0) {
            // get user unaccounted pending rewards and add to unsettledRewards
            user.unsettledRewards += _pendingReward(msg.sender);

            // transfer the rewards and clear `unsettledRewards`
            if (!_noHarvest && user.unsettledRewards > 0) {
                // SafeTransfer CAKE
                rewardToken.safeTransfer(msg.sender, user.unsettledRewards);

                // reset accumulative value
                user.unsettledRewards = 0;
            }
        }

        if (_amount > 0) {
            // get true deposit amount (safe tax/rebase token)
            uint256 _amountBefore = IERC20Metadata(stakedToken).balanceOf(address(this));
            stakedToken.safeTransferFrom(msg.sender, address(this), _amount);
            uint256 _amountAfter = IERC20Metadata(stakedToken).balanceOf(address(this));
            _amount = _amountAfter - _amountBefore;

            // update user.amount
            user.amount = user.amount + _amount;
        }

        // update multiplier
        _updateBoostMultiplier(msg.sender, 0);

        // update debt
        user.rewardDebt = (user.boostedAmount * accTokenPerShare) / PRECISION_FACTOR;

        emit Deposit(msg.sender, _amount);
    }

    /*
     * @notice Deposit reward tokens and expand end timestamp
     * @param _amount: amount to deposit (in stakeToken)
     */
    function depositRewardAndExpend(uint256 _amount) external nonReentrant {
        require(block.timestamp < endTimestamp, "Pool should not ended");

        uint256 _rewardAmountBefore = IERC20Metadata(rewardToken).balanceOf(address(this));
        IERC20Metadata(rewardToken).safeTransferFrom(msg.sender, address(this), _amount);
        uint256 _rewardAmountAfter = IERC20Metadata(rewardToken).balanceOf(address(this));
        uint256 _rewardAmount = _rewardAmountAfter - _rewardAmountBefore;

        uint256 newEndTimestamp = endTimestamp + _rewardAmount / rewardPerSecond;

        require(endTimestamp < newEndTimestamp, "New endTimestamp must be larger than old endTimestamp");

        endTimestamp = newEndTimestamp;

        emit DepositAndExpend(msg.sender, _rewardAmount, endTimestamp);
    }

    /*
     * @notice Withdraw staked tokens and collect reward tokens
     * @param _amount: amount to withdraw (in rewardToken)
     * @param _noHarvest: flag for harvest or not
     */
    function withdraw(uint256 _amount, bool _noHarvest) external nonReentrant {
        UserInfo storage user = userInfo[msg.sender];
        require(user.amount >= _amount, "Amount to withdraw too high");

        // always update pool to be safe
        _updatePool();

        // get user unaccounted pending rewards and add to unsettledRewards
        user.unsettledRewards += _pendingReward(msg.sender);

        if (_amount > 0) {
            user.amount = user.amount - _amount;
            stakedToken.safeTransfer(msg.sender, _amount);
        }

        // transfer the rewards and clear `unsettledRewards`
        if (!_noHarvest && user.unsettledRewards > 0) {
            // SafeTransfer CAKE
            rewardToken.safeTransfer(msg.sender, user.unsettledRewards);

            // reset accumulative value
            user.unsettledRewards = 0;
        }

        // update multiplier
        _updateBoostMultiplier(msg.sender, 0);

        // update debt
        user.rewardDebt = (user.boostedAmount * accTokenPerShare) / PRECISION_FACTOR;

        emit Withdraw(msg.sender, _amount);
    }

    /*
     * @notice Withdraw staked tokens without caring about rewards rewards
     * @dev Needs to be for emergency.
     */
    function emergencyWithdraw() external nonReentrant {
        UserInfo storage user = userInfo[msg.sender];
        uint256 amountToTransfer = user.amount;

        // remove boosted amount from total share first
        totalBoostedShare = totalBoostedShare > user.boostedAmount ? totalBoostedShare - user.boostedAmount : 0;

        // reset everything
        user.amount = 0;
        user.boostMultiplier = BOOST_PRECISION;
        user.boostedAmount = 0;
        user.rewardDebt = 0;
        // reset accumulative value
        user.unsettledRewards = 0;

        if (amountToTransfer > 0) {
            stakedToken.safeTransfer(msg.sender, amountToTransfer);
        }

        emit EmergencyWithdraw(msg.sender, amountToTransfer);
    }

    /*
     * @notice Stop rewards
     * @dev Only callable by owner. Needs to be for emergency.
     */
    function emergencyRewardWithdraw(uint256 _amount) external onlyOwner {
        rewardToken.safeTransfer(msg.sender, _amount);
    }

    /**
    * @notice Allows the owner to recover tokens sent to the contract by mistake
     * @param _token: token address
     * @dev Callable by owner
     */
    function recoverToken(address _token) external onlyOwner {
        require(_token != address(stakedToken), "Operations: Cannot recover staked token");
        require(_token != address(rewardToken), "Operations: Cannot recover reward token");

        uint256 balance = IERC20Metadata(_token).balanceOf(address(this));
        require(balance != 0, "Operations: Cannot recover zero balance");

        IERC20Metadata(_token).safeTransfer(msg.sender, balance);

        emit TokenRecovery(_token, balance);
    }

    /*
     * @notice Stop rewards
     * @dev Only callable by owner
     */
    function stopReward() external onlyOwner {
        endTimestamp = block.timestamp;
        emit RewardsStop(endTimestamp);
    }

    /*
     * @notice Update reward per block, if campaign is ended, admin can call restart and update rewardPerSecond there
     * @dev Only callable by owner.
     * @param _rewardPerSecond: the reward per second
     */
    function updateRewardPerSecond(uint256 _rewardPerSecond) external onlyOwner {
        require(block.timestamp < endTimestamp, "Pool should not ended");
        uint256 decimalsRewardToken = uint256(rewardToken.decimals());
        require(PRECISION_FACTOR * _rewardPerSecond / (10**decimalsRewardToken) >= 100_000_000, "rewardPerSecond must be larger");

        _updatePool();

        emit NewRewardPerSecond(rewardPerSecond, _rewardPerSecond, startTimestamp, endTimestamp);

        rewardPerSecond = _rewardPerSecond;
    }

    /**
     * @notice It allows the admin to update start and end blocks
     * @dev This function is only callable by owner.
     * @param _startTimestamp: the new start timestamp
     * @param _endTimestamp: the new end timestamp
     */
    function updateStartAndEndTimestamp(uint256 _startTimestamp, uint256 _endTimestamp) external onlyOwner {
        require(block.timestamp < startTimestamp, "Pool has started");
        require(_startTimestamp < _endTimestamp, "New startTimestamp must be lower than new endTimestamp");
        require(block.timestamp < _startTimestamp, "New startTimestamp must be higher than current timestamp");

        emit NewStartAndEndTimestamp(startTimestamp, _startTimestamp, endTimestamp, _endTimestamp, rewardPerSecond);

        startTimestamp = _startTimestamp;
        endTimestamp = _endTimestamp;

        // Set the lastRewardTimestamp as the startTimestamp
        lastRewardTimestamp = startTimestamp;
    }

    /// @notice Update boost contract address and max boost factor.
    /// @param _newBoostContract The new address for handling all the share boosts.
    function updateBoostContract(address _newBoostContract) external onlyOwner {
        require(
            _newBoostContract != address(0) && _newBoostContract != boostContract,
            "New boost contract address must be valid"
        );

        boostContract = _newBoostContract;
        emit BoostContractUpdated(_newBoostContract);
    }

    /// @notice Update user boost factor from boost contract.
    /// @param _userAddress The user address for boost factor updates.
    function updateBoostMultiplierByUser(
        address _userAddress
    ) external nonReentrant {
        UserInfo storage user = userInfo[_userAddress];

        // always update pool to be safe
        _updatePool();

        if (user.amount > 0) {
            // get user unaccounted pending rewards and add to unsettledRewards
            user.unsettledRewards += _pendingReward(_userAddress);
        }

        // update multiplier based on the latest user.amount
        _updateBoostMultiplier(_userAddress, 0);

        // update debt
        user.rewardDebt = (user.boostedAmount * accTokenPerShare) / PRECISION_FACTOR;
    }

    /// @notice Update user boost factor from boost contract.
    /// @param _userAddress The user address for boost factor updates.
    /// @param _newMultiplier The multiplier update to user.
    function updateBoostMultiplier(
        address _userAddress,
        uint256 _newMultiplier
    ) external onlyBoostContract nonReentrant {
        UserInfo storage user = userInfo[_userAddress];

        // always update pool to be safe
        _updatePool();

        if (user.amount > 0) {
            // get user unaccounted pending rewards and add to unsettledRewards
            user.unsettledRewards += _pendingReward(_userAddress);
        }

        // update multiplier based on the latest user.amount
        _updateBoostMultiplier(_userAddress, _newMultiplier);

        // update debt
        user.rewardDebt = (user.boostedAmount * accTokenPerShare) / PRECISION_FACTOR;
    }

    /**
     * @notice It allows the admin to restart
     * @dev This function is only callable by owner.
     * @param _startTimestamp: the new start timestamp
     * @param _endTimestamp: the new end timestamp
     * @param _rewardPerSecond: the new rewardPerSecond
     */
    function restart(uint256 _startTimestamp, uint256 _endTimestamp, uint256 _rewardPerSecond) external onlyOwner {
        require(block.timestamp > endTimestamp, "Pool should be ended");
        require(block.timestamp <= _startTimestamp, "New startTimestamp must be higher than current timestamp");
        require(_startTimestamp < _endTimestamp, "New startTimestamp must be lower than new endTimestamp");

        // always update pool to be safe
        _updatePool();

        startTimestamp = _startTimestamp;
        endTimestamp = _endTimestamp;
        rewardPerSecond = _rewardPerSecond;

        // Set the lastRewardTimestamp as the startTimestamp
        lastRewardTimestamp = _startTimestamp;

        emit Restart(_startTimestamp, _endTimestamp, _rewardPerSecond);
    }

    /*
     * @notice View function to see total pending reward, including accounted but unsettled 
     * @param _userAddress: user address
     * @return Pending + Unsettled reward for a given user
     */
    function pendingReward(address _userAddress) external view returns (uint256) {
        UserInfo memory user = userInfo[_userAddress];
        return user.unsettledRewards + _pendingReward(_userAddress);
    }
    
    /*
     * @notice View function to see pending reward based on accTokenPerShare&rewardDebt calculation
     * @param _userAddress: user address
     * @return Pending reward for a given user
     */
    function _pendingReward(address _userAddress) internal view returns (uint256) {
        UserInfo storage user = userInfo[_userAddress];

        if (block.timestamp > lastRewardTimestamp && totalBoostedShare != 0) {
            uint256 multiplier = _getMultiplier(lastRewardTimestamp, block.timestamp);
            uint256 cakeReward = multiplier * rewardPerSecond;
            uint256 adjustedTokenPerShare = accTokenPerShare + (cakeReward * PRECISION_FACTOR) / totalBoostedShare;
            return (user.boostedAmount * adjustedTokenPerShare) / PRECISION_FACTOR - user.rewardDebt;
        } else {
            return (user.boostedAmount * accTokenPerShare) / PRECISION_FACTOR - user.rewardDebt;
        }
    }

    /*
     * @notice Update reward variables of the given pool to be up-to-date.
     */
    function _updatePool() internal {
        if (block.timestamp <= lastRewardTimestamp) {
            return;
        }

        if (totalBoostedShare == 0) {
            lastRewardTimestamp = block.timestamp;
            return;
        }

        uint256 multiplier = _getMultiplier(lastRewardTimestamp, block.timestamp);
        uint256 cakeReward = multiplier * rewardPerSecond;
        accTokenPerShare = accTokenPerShare + (cakeReward * PRECISION_FACTOR) / totalBoostedShare;
        lastRewardTimestamp = block.timestamp;
    }

    /*
     * @notice Return reward multiplier over the given _from to _to block.
     * @param _from: block to start
     * @param _to: block to finish
     */
    function _getMultiplier(uint256 _from, uint256 _to) internal view returns (uint256) {
        if (_to <= endTimestamp) {
            return _to - _from;
        } else if (_from >= endTimestamp) {
            return 0;
        } else {
            return endTimestamp - _from;
        }
    }

    /// @notice Update user boost factor.
    /// @param _userAddress The user address for boost factor updates.
    /// @param _newMultiplier The multiplier update to user.
    function _updateBoostMultiplier(
        address _userAddress,
        uint256 _newMultiplier
    ) internal {
        require(_userAddress != address(0), "The user address must be valid");

        UserInfo storage user = userInfo[_userAddress];

        if (_newMultiplier == 0) {
            _newMultiplier = BOOST_PRECISION;

            if (address(boostContract) != address(0)) {
                _newMultiplier = IFarmBooster(boostContract).updatePositionBoostMultiplier(_userAddress);
            }
        }

        // filter the invalid value
        if (_newMultiplier < BOOST_PRECISION) {
            _newMultiplier = BOOST_PRECISION;
        }
        if (_newMultiplier > MAX_BOOST_PRECISION) {
            _newMultiplier = MAX_BOOST_PRECISION;
        }

        // get current multiplier
        uint256 _oldMultiplier = user.boostMultiplier;
        uint256 _oldBoostedAmount = user.boostedAmount;

        // set new multiplier and calculate user's boosted shares
        user.boostMultiplier = _newMultiplier;
        user.boostedAmount = user.amount * _newMultiplier / BOOST_PRECISION;

        // add user's new boosted shares to total
        totalBoostedShare = totalBoostedShare + user.boostedAmount - _oldBoostedAmount;
        
        emit BoostMultiplierUpdated(_userAddress, _oldMultiplier, _newMultiplier);
    }
}

{
  "optimizer": {
    "enabled": true,
    "runs": 10
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

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[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"wrapper","type":"address"},{"indexed":true,"internalType":"address","name":"stakedToken","type":"address"},{"indexed":true,"internalType":"address","name":"rewardToken","type":"address"},{"indexed":false,"internalType":"uint256","name":"rewardPerSecond","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"startTimestamp","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"endTimestamp","type":"uint256"}],"name":"NewWrapperContract","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"},{"inputs":[{"internalType":"contract IERC20Metadata","name":"_stakedToken","type":"address"},{"internalType":"contract IERC20Metadata","name":"_rewardToken","type":"address"},{"internalType":"uint256","name":"_rewardPerSecond","type":"uint256"},{"internalType":"uint256","name":"_startTimestamp","type":"uint256"},{"internalType":"uint256","name":"_endTimestamp","type":"uint256"},{"internalType":"address","name":"_admin","type":"address"},{"internalType":"address","name":"_boostContract","type":"address"}],"name":"deployPool","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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