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// SPDX-License-Identifier: MIT
pragma solidity 0.8.13;

import {ReentrancyGuard} from "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import {Ownable2Step} from "@openzeppelin/contracts/access/Ownable2Step.sol";
import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import {IPairInfo} from "./interfaces/IPairInfo.sol";
import {IBribe} from "./interfaces/IBribe.sol";
import {IFeeVault} from "./interfaces/IFeeVault.sol";
import {IRewarder} from "./interfaces/IRewarder.sol";
import {Math} from "./libraries/Math.sol";
import {Constants} from "./Constants.sol";
import {GaugeV2} from "./GaugeV2.sol";

contract GaugeV2_CL is ReentrancyGuard, Ownable2Step, GaugeV2 {
    address public feeVault;

    constructor(
        address _rewardToken,
        address _ve,
        address _stakeToken,
        address _distribution,
        address _internal_bribe,
        address _external_bribe,
        address _feeVault
    ) GaugeV2(_rewardToken, _ve, _stakeToken, _distribution, _internal_bribe, _external_bribe, true) {
        feeVault = _feeVault; // fee vault concentrated liquidity position
    }

    ///@notice set feeVault address
    function setFeeVault(address _feeVault) external onlyOwner {
        require(_feeVault != address(0), "zero addr");
        require(_feeVault != feeVault, "same addr");
        feeVault = _feeVault;
    }

    function _claimFees() internal override returns (uint256 claimed0, uint256 claimed1) {
        address _stakeToken = address(stakeToken);
        (claimed0, claimed1) = IFeeVault(feeVault).claimFees();

        if (claimed0 > 0 || claimed1 > 0) {
            uint256 _fees0 = claimed0;
            uint256 _fees1 = claimed1;

            address _token0 = IPairInfo(_stakeToken).token0();
            address _token1 = IPairInfo(_stakeToken).token1();
            if (_fees0 > 0) {
                IERC20(_token0).approve(internal_bribe, 0);
                IERC20(_token0).approve(internal_bribe, _fees0);
                IBribe(internal_bribe).notifyRewardAmount(_token0, _fees0);
            }

            if (_fees1 > 0) {
                IERC20(_token1).approve(internal_bribe, 0);
                IERC20(_token1).approve(internal_bribe, _fees1);
                IBribe(internal_bribe).notifyRewardAmount(_token1, _fees1);
            }
            emit ClaimFees(msg.sender, claimed0, claimed1);
        }
    }
}

// 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) (access/Ownable2Step.sol)

pragma solidity ^0.8.0;

import "./Ownable.sol";

/**
 * @dev Contract module which provides 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} and {acceptOwnership}.
 *
 * This module is used through inheritance. It will make available all functions
 * from parent (Ownable).
 */
abstract contract Ownable2Step is Ownable {
    address private _pendingOwner;

    event OwnershipTransferStarted(address indexed previousOwner, address indexed newOwner);

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

    /**
     * @dev Starts the ownership transfer of the contract to a new account. Replaces the pending transfer if there is one.
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual override onlyOwner {
        _pendingOwner = newOwner;
        emit OwnershipTransferStarted(owner(), newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`) and deletes any pending owner.
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual override {
        delete _pendingOwner;
        super._transferOwnership(newOwner);
    }

    /**
     * @dev The new owner accepts the ownership transfer.
     */
    function acceptOwnership() public virtual {
        address sender = _msgSender();
        require(pendingOwner() == sender, "Ownable2Step: caller is not the new owner");
        _transferOwnership(sender);
    }
}

// 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 (last updated v4.9.4) (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.
 *
 * ==== Security Considerations
 *
 * There are two important considerations concerning the use of `permit`. The first is that a valid permit signature
 * expresses an allowance, and it should not be assumed to convey additional meaning. In particular, it should not be
 * considered as an intention to spend the allowance in any specific way. The second is that because permits have
 * built-in replay protection and can be submitted by anyone, they can be frontrun. A protocol that uses permits should
 * take this into consideration and allow a `permit` call to fail. Combining these two aspects, a pattern that may be
 * generally recommended is:
 *
 * ```solidity
 * function doThingWithPermit(..., uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public {
 *     try token.permit(msg.sender, address(this), value, deadline, v, r, s) {} catch {}
 *     doThing(..., value);
 * }
 *
 * function doThing(..., uint256 value) public {
 *     token.safeTransferFrom(msg.sender, address(this), value);
 *     ...
 * }
 * ```
 *
 * Observe that: 1) `msg.sender` is used as the owner, leaving no ambiguity as to the signer intent, and 2) the use of
 * `try/catch` allows the permit to fail and makes the code tolerant to frontrunning. (See also
 * {SafeERC20-safeTransferFrom}).
 *
 * Additionally, note that smart contract wallets (such as Argent or Safe) are not able to produce permit signatures, so
 * contracts should have entry points that don't rely on permit.
 */
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].
     *
     * CAUTION: See Security Considerations above.
     */
    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 (last updated v4.9.4) (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;
    }

    function _contextSuffixLength() internal view virtual returns (uint256) {
        return 0;
    }
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.13;

library Constants {
    uint48 constant EPOCH = 1 weeks;
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.13;

import { ReentrancyGuard } from "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import { Ownable2Step } from "@openzeppelin/contracts/access/Ownable2Step.sol";
import { SafeERC20 } from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol";

import { IPair } from './interfaces/IPair.sol';
import { IBribe } from './interfaces/IBribe.sol';
import { IGauge } from './interfaces/IGauge.sol';
import {IRewarder} from './interfaces/IRewarder.sol';
import { Math } from "./libraries/Math.sol";
import { Constants } from "./Constants.sol";
import { IVoterV5 } from './interfaces/IVoterV5.sol';

contract GaugeV2 is ReentrancyGuard, Ownable2Step {

    using SafeERC20 for IERC20;

    bool public immutable isForPair;
    bool public emergency;


    IERC20 public rewardToken;
    IERC20 public immutable stakeToken;

    address public VE;
    address public DISTRIBUTION;
    address public gaugeRewarder;
    address public internal_bribe;
    address public external_bribe;

    uint256 public immutable DURATION;
    uint internal constant MAX_REWARD_TOKENS = 6;

    address[] public rewards;
    mapping(address => bool) public isReward;

    mapping(address => uint) public rewardRate;
    mapping(address => uint) public periodFinishToken;
    mapping(address => uint) public lastUpdateTime;
    mapping(address => uint) public rewardPerTokenStored;

    mapping(address => mapping(address => uint)) public lastEarn;
    mapping(address => mapping(address => uint)) public userRewardPerTokenStored;
    mapping(address => mapping(address => uint)) public userRewardPerTokenPaid;

    uint256 internal _totalSupply;
    mapping(address => uint256) internal _balances;

    mapping(address => uint) public balanceWithLock;
    mapping(address => uint) public lockEnd;

    /// @dev Events

    event RewardAdded(uint256 reward);
    event Deposit(address indexed user, uint256 amount);
    event Withdraw(address indexed user, uint256 amount);
    event Harvest(address indexed user, uint256 reward);

    event ClaimFees(address indexed from, uint256 claimed0, uint256 claimed1);
    event EmergencyActivated(address indexed gauge, uint256 timestamp);
    event EmergencyDeactivated(address indexed gauge, uint256 timestamp);
    event SetDistribution(address newDistribution);
    event SetRewarder(address newRewarder);
    event NotifyReward(address sender, address token, uint256 amount);

    /// @dev Errors
    error OnlyDistributor();
    error IsEmergency(bool emergency);
    error ZeroAddress();
    error SameAddress();
    error OnlyAllowed();
    error InvalidAmount();
    error NoBalances();

    modifier updateReward(address account) {
        _updateRewardForAllTokens(account);
        _;
    }

    modifier onlyDistribution() {
        if(msg.sender != DISTRIBUTION) revert OnlyDistributor();
        _;
    }

    modifier isNotEmergency() {
        if(emergency == true) revert IsEmergency(emergency);
        _;
    }

    constructor(address _rewardToken,address _ve,address _token,address _distribution, address _internal_bribe, address _external_bribe, bool _isForPair) {
        rewardToken = IERC20(_rewardToken);     // main reward
        VE = _ve;                               // vested
        stakeToken = IERC20(_token);             // underlying (LP)
        DISTRIBUTION = _distribution;           // distribution address (voter)
        DURATION = Constants.EPOCH;              // distribution time

        internal_bribe = _internal_bribe;       // lp fees goes here
        external_bribe = _external_bribe;       // bribe fees goes here

        isForPair = _isForPair;                 // pair boolean, if false no claim_fees

        emergency = false;
        
        isReward[_rewardToken] = true;
        rewards.push(_rewardToken);                       // emergency flag

    }


    /* -----------------------------------------------------------------------------
    --------------------------------------------------------------------------------
    --------------------------------------------------------------------------------
                                    ONLY OWNER
    --------------------------------------------------------------------------------
    --------------------------------------------------------------------------------
    ----------------------------------------------------------------------------- */

    ///@notice set distribution address (should be voter)
    function setDistribution(address _distribution) external onlyOwner {
        if(_distribution == address(0)) revert ZeroAddress();
        if(_distribution == DISTRIBUTION) revert SameAddress();
        DISTRIBUTION = _distribution;
        emit SetDistribution(DISTRIBUTION);
    }

    ///@notice set gauge rewarder address
    function setGaugeRewarder(address _gaugeRewarder) external onlyOwner {
        if(_gaugeRewarder == gaugeRewarder) revert SameAddress();
        gaugeRewarder = _gaugeRewarder;
        emit SetRewarder(gaugeRewarder);
    }


    ///@notice set new internal bribe contract (where to send fees)
    function setInternalBribe(address _int) external onlyOwner {
        if(_int == address(0)) revert ZeroAddress();
        internal_bribe = _int;
    }

    function activateEmergencyMode() external onlyOwner {
        if(emergency == true) revert IsEmergency(emergency);
        emergency = true;
        emit EmergencyActivated(address(this), block.timestamp);
    }

    function stopEmergencyMode() external onlyOwner {
        if(emergency == false) revert IsEmergency(emergency);
        emergency = false;
        emit EmergencyDeactivated(address(this), block.timestamp);
    }

    /// @notice Update rewardToken address to match with Voter contract
    function updateRewardToken() external onlyOwner {
        isReward[address(rewardToken)] = false;
        address rewardAddress = IVoterV5(DISTRIBUTION).oLynx();
        if (rewardAddress == address(0)) {
            rewardAddress = IVoterV5(DISTRIBUTION).base();
        }

        if (!isReward[rewardAddress]) {
            isReward[rewardAddress] = true;
        }
        rewards.push(rewardAddress);
        rewardToken = IERC20(rewardAddress);
    }

    /// @notice Owner can add reward tokens beyond limit
    function addRewardToken(address _rewardTokn) external onlyOwner {
        if (!isReward[_rewardTokn]) {
            isReward[_rewardTokn] = true;
            rewards.push(_rewardTokn);
        } else {
            revert("Already added");
        }
    }

    /* -----------------------------------------------------------------------------
    --------------------------------------------------------------------------------
    --------------------------------------------------------------------------------
                                    VIEW FUNCTIONS
    --------------------------------------------------------------------------------
    --------------------------------------------------------------------------------
    ----------------------------------------------------------------------------- */

    ///@notice total supply held
    function totalSupply() public view returns (uint256) {
        return _totalSupply;
    }

    ///@notice balance of a user
    function balanceOf(address account) external view returns (uint256) {
        return _balances[account];
    }

    function availableBalance(address account) public view returns (uint) {
        if (block.timestamp >= lockEnd[account]) return _balances[account];
        return _balances[account] - balanceWithLock[account];
    }

    function lastTimeRewardApplicable(address rewardAddress) public view returns (uint256) {
        return Math.min(block.timestamp, periodFinishToken[rewardAddress]);
    }

    function rewardPerToken(address rewardAddress) public view returns (uint256) {
        if (_totalSupply == 0) {
            return rewardPerTokenStored[rewardAddress];
        } else {
            return rewardPerTokenStored[rewardAddress] + (lastTimeRewardApplicable(rewardAddress) - lastUpdateTime[rewardAddress]) * rewardRate[rewardAddress] * 1e18 / _totalSupply; 
        }
    }

    ///@notice see earned rewards for user
    function earned(address account) external view returns (uint256) {
        return earned(account, address(rewardToken));
    }

    ///@notice see earned rewards for user
    function earned(address account, address rewardAddress) public view returns (uint256) {
        return userRewardPerTokenStored[rewardAddress][account] + _balances[account] * (rewardPerToken(rewardAddress) - userRewardPerTokenPaid[rewardAddress][account]) / 1e18;  
    }
    
    ///@notice get total reward for the duration
    function rewardForDuration(address rewardAddress) public view returns (uint256) {
        return rewardRate[rewardAddress] * DURATION;
    }

    function periodFinish(address rewardAddress) public view returns (uint256) {
        return periodFinishToken[rewardAddress];
    }

    /* -----------------------------------------------------------------------------
    --------------------------------------------------------------------------------
    --------------------------------------------------------------------------------
                                    USER INTERACTION
    --------------------------------------------------------------------------------
    --------------------------------------------------------------------------------
    ----------------------------------------------------------------------------- */


    ///@notice deposit all stakeToken of msg.sender
    function depositAll() external {
        _deposit(stakeToken.balanceOf(msg.sender), msg.sender);
    }

    ///@notice deposit amount stakeToken
    function deposit(uint256 amount) external {
        _deposit(amount, msg.sender);
    }

    ///@notice deposits a locked LP position. Generally called from oToken
    function depositWithLock(address account, uint256 amount, uint256 _lockDuration) external {
        require(msg.sender == account || msg.sender == address(rewardToken) || IVoterV5(DISTRIBUTION).isGaugeDepositor(msg.sender), "Not allowed to deposit with lock"); 
        _deposit(amount, account);

        if(block.timestamp >= lockEnd[account]) { 
            // if the current lock is expired release the tokens from that lock before locking again
            delete lockEnd[account];
            delete balanceWithLock[account];
        }

        balanceWithLock[account] += amount;
        uint256 currentLockEnd = lockEnd[account];
        uint256 newLockEnd = block.timestamp + _lockDuration ;
        if (currentLockEnd > newLockEnd) {
            // The lock end can only be extended
            revert("The current lock end > new lock end");
        } 
        lockEnd[account] = newLockEnd;
    }

    ///@notice deposit internal
    function _deposit(uint256 amount, address account) internal nonReentrant isNotEmergency updateReward(account) {
        if(amount <= 0) revert InvalidAmount();

        _balances[account] = _balances[account] + amount;
        _totalSupply = _totalSupply + amount;

        if (address(gaugeRewarder) != address(0)) {
            IRewarder(gaugeRewarder).onReward(account, account, _balances[account]);
        }

        stakeToken.safeTransferFrom(msg.sender, address(this), amount);

        emit Deposit(account, amount);
    }

    ///@notice withdraw all token
    function withdrawAll() external {
        _withdraw(_balances[msg.sender]);
    }

    ///@notice withdraw a certain amount of stakeToken
    function withdraw(uint256 amount) external {
        _withdraw(amount);
    }

    ///@notice withdraw internal
    function _withdraw(uint256 amount) internal nonReentrant isNotEmergency updateReward(msg.sender) {
        if(amount <= 0) revert InvalidAmount();        
        if(_balances[msg.sender] <= 0) revert NoBalances();

        if(block.timestamp >= lockEnd[msg.sender]) { 
            // if the current lock is expired, release the tokens
            delete lockEnd[msg.sender];
            delete balanceWithLock[msg.sender];
        }

        uint256 totalBalance = _balances[msg.sender];
        uint256 lockedAmount = balanceWithLock[msg.sender];
        uint256 freeAmount = totalBalance - lockedAmount;

        // Update lock related mappings when withdraw amount greater than free amount
        if (amount > freeAmount) {
            revert("Cannot withdraw more than free amount");
        }

        _totalSupply -= amount;
        _balances[msg.sender] -= amount;

        if (address(gaugeRewarder) != address(0)) {
            IRewarder(gaugeRewarder).onReward(msg.sender, msg.sender,_balances[msg.sender]);
        }

        stakeToken.safeTransfer(msg.sender, amount);

        emit Withdraw(msg.sender, amount);
    }

    function emergencyWithdraw() external nonReentrant {
        if(!emergency) revert IsEmergency(emergency);
        if(_balances[msg.sender] <= 0) revert NoBalances();

        uint256 _amount = _balances[msg.sender];
        _totalSupply = _totalSupply - _amount;
        _balances[msg.sender] = 0;

        if (gaugeRewarder != address(0)) {
            IRewarder(gaugeRewarder).onEmergencyWithdrawAmount(msg.sender, _amount);
        }

        stakeToken.safeTransfer(msg.sender, _amount);

        emit Withdraw(msg.sender, _amount);
    }
    function emergencyWithdrawAmount(uint256 _amount) external nonReentrant {
        if(!emergency) revert IsEmergency(emergency);
        if(_balances[msg.sender] < _amount) revert NoBalances();

        _totalSupply = _totalSupply - _amount;
        _balances[msg.sender] -= _amount;

        if (gaugeRewarder != address(0)) {
            IRewarder(gaugeRewarder).onEmergencyWithdrawAmount(msg.sender, _amount);
        }

        stakeToken.safeTransfer(msg.sender, _amount);
        emit Withdraw(msg.sender, _amount);
    }

    ///@notice withdraw all stakeToken and harvest rewardToken
    function withdrawAllAndHarvest() external {
        _withdraw(_balances[msg.sender]);
        getReward();
    }

 
    /// @notice User harvest function called from distribution (voter allows harvest on multiple gauges)
    function getReward(address _user) external onlyDistribution {
        address[] memory tokens = new address[](1);
        tokens[0] = address(rewardToken);
        return _getReward(_user, tokens);
    }

    /// @notice User harvest function
    /// Enables backward compatibility and focuses on harvesting main reward tokern
    function getReward() public {
        address[] memory tokens = new address[](1);
        tokens[0] = address(rewardToken);
        return _getReward(msg.sender, tokens);
    }

    ///@notice User harvest function called from distribution (voter allows harvest on multiple gauges)
    function getReward(address _user, address[] memory tokens) external  {
        require(msg.sender == _user || msg.sender == DISTRIBUTION);
        return _getReward(_user, tokens);
    }

    function _getReward(address _user, address[] memory tokens) internal nonReentrant updateReward(_user) {
        uint length = tokens.length;
        for (uint i = 0; i < length; i++) { 
            address rewardAddress = tokens[i];
            uint256 reward = userRewardPerTokenStored[rewardAddress][_user];
            if (reward > 0) {
                userRewardPerTokenStored[rewardAddress][_user] = 0;
                IERC20(rewardAddress).safeTransfer(_user, reward);
                emit Harvest(_user, reward);
            }
        }
        if (gaugeRewarder != address(0)) {
            IRewarder(gaugeRewarder).onReward(_user, _user, _balances[_user]);
        }
    }

    function left(address token) external view returns (uint) {
        if (block.timestamp >= periodFinishToken[token]) return 0;
        uint _remaining = periodFinishToken[token] - block.timestamp;
        return _remaining * rewardRate[token];
    }

    function _updateRewardForAllTokens(address account) internal {
      uint256 length = rewards.length;
      for (uint i; i < length; i++) {
        address rewardAddress = rewards[i];
        rewardPerTokenStored[rewardAddress] = rewardPerToken(rewardAddress);
        lastUpdateTime[rewardAddress] = lastTimeRewardApplicable(rewardAddress);
        if (account != address(0)) {
            userRewardPerTokenStored[rewardAddress][account] = earned(account, rewardAddress);
            userRewardPerTokenPaid[rewardAddress][account] = rewardPerTokenStored[rewardAddress];
        }
      }
      
    }


    /* -----------------------------------------------------------------------------
    --------------------------------------------------------------------------------
    --------------------------------------------------------------------------------
                                    DISTRIBUTION
    --------------------------------------------------------------------------------
    --------------------------------------------------------------------------------
    ----------------------------------------------------------------------------- */


    /// @dev Receive rewards
    function notifyRewardAmount(address rewardAddress, uint256 rewardAmount) external virtual nonReentrant isNotEmergency updateReward(address(0)) {
        uint256 balanceBefore = IERC20(rewardAddress).balanceOf(address(this));
        IERC20(rewardAddress).safeTransferFrom(msg.sender, address(this), rewardAmount);
        uint256 balanceAfter = IERC20(rewardAddress).balanceOf(address(this));
        rewardAmount = balanceAfter - balanceBefore;

        _notifyRewardAmount(rewardAddress, rewardAmount);
    }

    function _notifyRewardAmount(address rewardAddress, uint rewardAmount) internal {
        require(rewardAddress != address(stakeToken), "Can't add stake token as reward");
        require(rewardAmount > 0, "Reward amount needs to be higher than 0");
        if (!isReward[rewardAddress]) {
            require(IVoterV5(DISTRIBUTION).isWhitelisted(rewardAddress), "rewards tokens must be whitelisted");
            if (rewardAddress != IVoterV5(DISTRIBUTION).oLynx() && rewardAddress != IVoterV5(DISTRIBUTION).base())
            require(rewards.length < MAX_REWARD_TOKENS, "too many rewards tokens");
        }
        if (block.timestamp >= periodFinishToken[rewardAddress]) {
            rewardRate[rewardAddress] = rewardAmount / DURATION;
        } else {
            uint256 remaining = periodFinishToken[rewardAddress] - block.timestamp;
            uint256 leftover = remaining * rewardRate[rewardAddress];
            /// @dev: This will spread the remaining rewards over the new period.
            rewardRate[rewardAddress] = (rewardAmount + leftover) / DURATION;
        }

        // Ensure the provided reward amount is not more than the balance in the contract.
        // This keeps the reward rate in the right range, preventing overflows due to
        // very high values of rewardRate in the earned and rewardsPerToken functions;
        // Reward + leftover must be less than 2^256 / 10^18 to avoid overflow.
        uint256 balance = IERC20(rewardAddress).balanceOf(address(this));
        require(rewardRate[rewardAddress] <= balance / DURATION, "Provided reward too high");

        lastUpdateTime[rewardAddress] = block.timestamp;
        periodFinishToken[rewardAddress] = block.timestamp + DURATION;
        if (!isReward[rewardAddress]) {
            isReward[rewardAddress] = true;
            rewards.push(rewardAddress);
        }

        emit NotifyReward(msg.sender, rewardAddress, rewardAmount);
    }

    function claimFees() external nonReentrant returns (uint256 claimed0, uint256 claimed1) {
        return _claimFees();
    }

     function _claimFees() internal virtual returns (uint256 claimed0, uint256 claimed1) {
        if (!isForPair) {
            return (0, 0);
        }
        address _token = address(stakeToken);
        (claimed0, claimed1) = IPair(_token).claimFees();
        if (claimed0 > 0 || claimed1 > 0) {

            uint256 _fees0 = claimed0;
            uint256 _fees1 = claimed1;

            (address _token0, address _token1) = IPair(_token).tokens();

            if (_fees0  > 0) {
                IERC20(_token0).approve(internal_bribe, 0);
                IERC20(_token0).approve(internal_bribe, _fees0);
                IBribe(internal_bribe).notifyRewardAmount(_token0, _fees0);
            } 
            if (_fees1  > 0) {
                IERC20(_token1).approve(internal_bribe, 0);
                IERC20(_token1).approve(internal_bribe, _fees1);
                IBribe(internal_bribe).notifyRewardAmount(_token1, _fees1);
            } 
            emit ClaimFees(msg.sender, claimed0, claimed1);
        }
    }

}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.13;

interface IBribe {
    function deposit(uint amount, uint tokenId) external;
    function withdraw(uint amount, uint tokenId) external;
    function getRewardForOwner(uint tokenId, address[] memory tokens) external;
    function getRewardForAddress(address _owner, address[] memory tokens) external;
    function notifyRewardAmount(address token, uint amount) external;
    
    function addReward(address) external;
    function setVoter(address _Voter) external;
    function setMinter(address _Voter) external;
    function setOwner(address _Voter) external;
    function emergencyRecoverERC20(address tokenAddress, uint256 tokenAmount) external;
    function recoverERC20AndUpdateData(address tokenAddress, uint256 tokenAmount) external;
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.13;

interface IFeeVault {
    function claimFees() external returns(uint256 claimed0, uint256 claimed1);
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.13;

interface IGauge {
    function notifyRewardAmount(address token, uint amount) external;

    function getReward(address account, address[] memory tokens) external;

    function getReward(address account) external;

    function claimFees() external returns (uint claimed0, uint claimed1);

    function rewardRate(address _pair) external view returns (uint);

    function balanceOf(address _account) external view returns (uint);

    function isForPair() external view returns (bool);

    function totalSupply() external view returns (uint);

    function earned(address token, address account) external view returns (uint);

    function stakeToken() external view returns (address);

    function setDistribution(address _distro) external;

    function addRewardToken(address _rewardToken) external;

    function updateRewardToken() external;

    function activateEmergencyMode() external;

    function stopEmergencyMode() external;

    function setInternalBribe(address intbribe) external;

    function setGaugeRewarder(address _gr) external;

    function setFeeVault(address _feeVault) external;

    function depositWithLock(address account, uint256 amount, uint256 _lockDuration) external;
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.13;

interface IPair {
    function metadata() external view returns (uint dec0, uint dec1, uint r0, uint r1, bool st, address t0, address t1);
    function claimFees() external returns (uint, uint);
    function tokens() external view returns (address, address);
    function token0() external view returns (address);
    function token1() external view returns (address);
    function transferFrom(address src, address dst, uint amount) external returns (bool);
    function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external;
    function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
    function burn(address to) external returns (uint amount0, uint amount1);
    function mint(address to) external returns (uint liquidity);
    function getReserves() external view returns (uint _reserve0, uint _reserve1, uint _blockTimestampLast);
    function getAmountOut(uint, address) external view returns (uint);

    function name() external view returns(string memory);
    function symbol() external view returns(string memory);
    function totalSupply() external view returns (uint);
    function decimals() external view returns (uint8);

    function claimable0(address _user) external view returns (uint);
    function claimable1(address _user) external view returns (uint);

    function isStable() external view returns(bool);


}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.13;

interface IPairInfo {

    function token0() external view returns(address);
    function reserve0() external view returns(uint);
    function decimals0() external view returns(uint);
    function token1() external view returns(address);
    function reserve1() external view returns(uint);
    function decimals1() external view returns(uint);
    function isPair(address _pair) external view returns(bool);
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.13;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";

interface IRewarder {
    function onReward(uint256 pid, address user, address recipient, uint256 lqdrAmount, uint256 newLpAmount) external;
    function pendingTokens(uint256 pid, address user, uint256 lqdrAmount) external view returns (IERC20[] memory, uint256[] memory);
    function onReward(address user, address recipient, uint256 userBalance) external;
    function onEmergencyWithdrawAmount(address user, uint256 amount) external;
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.13;

interface IVoterV5 {
    function ve() external view returns (address);
    function oLynx() external view returns (address);
    function base() external view returns (address);
    function gauges(address _pair) external view returns (address);
    function isGauge(address _gauge) external view returns (bool);
    function poolForGauge(address _gauge) external view returns (address);
    function factory() external view returns (address);
    function minter() external view returns(address);
    function isWhitelisted(address token) external view returns (bool);
    function isGaugeDepositor(address depositor) external view returns (bool);
    function notifyRewardAmount(uint amount) external;
    function distributeAll() external;
    function distributeFees(address[] memory _gauges) external;

    function internal_bribes(address _gauge) external view returns (address);
    function external_bribes(address _gauge) external view returns (address);

    function usedWeights(address _account) external view returns(uint);
    function lastVoted(address _account) external view returns(uint);
    function poolVote(address _account, uint _index) external view returns(address _pair);
    function votes(address _account, address _pool) external view returns(uint votes);
    function poolVoteLength(address _account) external view returns(uint);
    function _epochTimestamp() external view returns(uint);
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.13;

library Math {
    function max(uint a, uint b) internal pure returns (uint) {
        return a >= b ? a : b;
    }
    function min(uint a, uint b) internal pure returns (uint) {
        return a < b ? a : b;
    }
    function sqrt(uint y) internal pure returns (uint z) {
        if (y > 3) {
            z = y;
            uint x = y / 2 + 1;
            while (x < z) {
                z = x;
                x = (y / x + x) / 2;
            }
        } else if (y != 0) {
            z = 1;
        }
    }
    function cbrt(uint256 n) internal pure returns (uint256) { unchecked {
        uint256 x = 0;
        for (uint256 y = 1 << 255; y > 0; y >>= 3) {
            x <<= 1;
            uint256 z = 3 * x * (x + 1) + 1;
            if (n / y >= z) {
                n -= y * z;
                x += 1;
            }
        }
        return x;
    }}
    function sub(uint x, uint y) internal pure returns (uint z) {
        require((z = x - y) <= x, 'Math: Sub-underflow');
    }
    function abs(int256 n) internal pure returns (uint256) {
        unchecked {
            // must be unchecked in order to support `n = type(int256).min`
            return uint256(n >= 0 ? n : -n);
        }
    }
}

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

• No Contract Security Audit Submitted- Submit Audit Here

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"uint256","name":"claimed0","type":"uint256"},{"internalType":"uint256","name":"claimed1","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"deposit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"depositAll","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"_lockDuration","type":"uint256"}],"name":"depositWithLock","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"earned","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"address","name":"rewardAddress","type":"address"}],"name":"earned","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"emergency","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"emergencyWithdraw","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"emergencyWithdrawAmount","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"external_bribe","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"feeVault","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"gaugeRewarder","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_user","type":"address"},{"internalType":"address[]","name":"tokens","type":"address[]"}],"name":"getReward","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"getReward","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_user","type":"address"}],"name":"getReward","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"internal_bribe","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"isForPair","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"isReward","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"}],"name":"lastEarn","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"rewardAddress","type":"address"}],"name":"lastTimeRewardApplicable","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"lastUpdateTime","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"}],"name":"left","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"lockEnd","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"rewardAddress","type":"address"},{"internalType":"uint256","name":"rewardAmount","type":"uint256"}],"name":"notifyRewardAmount","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pendingOwner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"rewardAddress","type":"address"}],"name":"periodFinish","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"periodFinishToken","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"rewardAddress","type":"address"}],"name":"rewardForDuration","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"rewardAddress","type":"address"}],"name":"rewardPerToken","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"rewardPerTokenStored","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"rewardRate","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"rewardToken","outputs":[{"internalType":"contract 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IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"stopEmergencyMode","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"updateRewardToken","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"}],"name":"userRewardPerTokenPaid","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"}],"name":"userRewardPerTokenStored","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"withdrawAll","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"withdrawAllAndHarvest","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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