// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.8.0;

// Sources flattened with hardhat v2.16.1 https://hardhat.org

// File @openzeppelin/contracts/utils/introspection/IERC165.sol@v4.8.3

// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)


/**
 * @dev Interface of the ERC165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[EIP].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165 {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}


// File @openzeppelin/contracts/token/ERC721/IERC721.sol@v4.8.3

// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC721/IERC721.sol)


/**
 * @dev Required interface of an ERC721 compliant contract.
 */
interface IERC721 is IERC165 {
    /**
     * @dev Emitted when `tokenId` token is transferred from `from` to `to`.
     */
    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
     */
    event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
     */
    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);

    /**
     * @dev Returns the number of tokens in ``owner``'s account.
     */
    function balanceOf(address owner) external view returns (uint256 balance);

    /**
     * @dev Returns the owner of the `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function ownerOf(uint256 tokenId) external view returns (address owner);

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId,
        bytes calldata data
    ) external;

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
     * are aware of the ERC721 protocol to prevent tokens from being forever locked.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must have been allowed to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external;

    /**
     * @dev Transfers `tokenId` token from `from` to `to`.
     *
     * WARNING: Note that the caller is responsible to confirm that the recipient is capable of receiving ERC721
     * or else they may be permanently lost. Usage of {safeTransferFrom} prevents loss, though the caller must
     * understand this adds an external call which potentially creates a reentrancy vulnerability.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external;

    /**
     * @dev Gives permission to `to` to transfer `tokenId` token to another account.
     * The approval is cleared when the token is transferred.
     *
     * Only a single account can be approved at a time, so approving the zero address clears previous approvals.
     *
     * Requirements:
     *
     * - The caller must own the token or be an approved operator.
     * - `tokenId` must exist.
     *
     * Emits an {Approval} event.
     */
    function approve(address to, uint256 tokenId) external;

    /**
     * @dev Approve or remove `operator` as an operator for the caller.
     * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
     *
     * Requirements:
     *
     * - The `operator` cannot be the caller.
     *
     * Emits an {ApprovalForAll} event.
     */
    function setApprovalForAll(address operator, bool _approved) external;

    /**
     * @dev Returns the account approved for `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function getApproved(uint256 tokenId) external view returns (address operator);

    /**
     * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
     *
     * See {setApprovalForAll}
     */
    function isApprovedForAll(address owner, address operator) external view returns (bool);
}


// File @openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol@v4.8.3

// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC721/extensions/IERC721Enumerable.sol)


/**
 * @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
 * @dev See https://eips.ethereum.org/EIPS/eip-721
 */
interface IERC721Enumerable is IERC721 {
    /**
     * @dev Returns the total amount of tokens stored by the contract.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns a token ID owned by `owner` at a given `index` of its token list.
     * Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
     */
    function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256);

    /**
     * @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
     * Use along with {totalSupply} to enumerate all tokens.
     */
    function tokenByIndex(uint256 index) external view returns (uint256);
}


// File @openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol@v4.8.3

// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)


/**
 * @title ERC-721 Non-Fungible Token Standard, optional metadata extension
 * @dev See https://eips.ethereum.org/EIPS/eip-721
 */
interface IERC721Metadata is IERC721 {
    /**
     * @dev Returns the token collection name.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the token collection symbol.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
     */
    function tokenURI(uint256 tokenId) external view returns (string memory);
}


// File contracts/Common/Context.sol


/*
 * @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 GSN 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 payable) {
        return payable(msg.sender);
    }

    function _msgData() internal view virtual returns (bytes memory) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}


// File contracts/Math/SafeMath.sol


/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");

        return c;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return sub(a, b, "SafeMath: subtraction overflow");
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     * - Subtraction cannot overflow.
     *
     * _Available since v2.4.0._
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        uint256 c = a - b;

        return c;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
        if (a == 0) {
            return 0;
        }

        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");

        return c;
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return div(a, b, "SafeMath: division by zero");
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     *
     * _Available since v2.4.0._
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        // Solidity only automatically asserts when dividing by 0
        require(b > 0, errorMessage);
        uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold

        return c;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return mod(a, b, "SafeMath: modulo by zero");
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts with custom message when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     *
     * _Available since v2.4.0._
     */
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }
}


// File contracts/ERC20/IERC20.sol



/**
 * @dev Interface of the ERC20 standard as defined in the EIP. Does not include
 * the optional functions; to access them see {ERC20Detailed}.
 */
interface IERC20 {
    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `sender` to `recipient` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);

    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);
}


// File contracts/Utils/Address.sol


/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

        uint256 size;
        // solhint-disable-next-line no-inline-assembly
        assembly { size := extcodesize(account) }
        return size > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
        (bool success, ) = recipient.call{ value: amount }("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain`call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
      return functionCall(target, data, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        require(isContract(target), "Address: call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.call{ value: value }(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.staticcall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly

                // solhint-disable-next-line no-inline-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}


// File contracts/ERC20/ERC20.sol





/**
 * @dev Implementation of the {IERC20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 * For a generic mechanism see {ERC20Mintable}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * We have followed general OpenZeppelin guidelines: functions revert instead
 * of returning `false` on failure. This behavior is nonetheless conventional
 * and does not conflict with the expectations of ERC20 applications.
 *
 * Additionally, an {Approval} event is emitted on calls to {transferFrom}.
 * This allows applications to reconstruct the allowance for all accounts just
 * by listening to said events. Other implementations of the EIP may not emit
 * these events, as it isn't required by the specification.
 *
 * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
 * functions have been added to mitigate the well-known issues around setting
 * allowances. See {IERC20-approve}.
 */
 
contract ERC20 is Context, IERC20 {
    using SafeMath for uint256;

    mapping (address => uint256) private _balances;

    mapping (address => mapping (address => uint256)) private _allowances;

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;
    uint8 private _decimals;
    
    /**
     * @dev Sets the values for {name} and {symbol}, initializes {decimals} with
     * a default value of 18.
     *
     * To select a different value for {decimals}, use {_setupDecimals}.
     *
     * All three of these values are immutable: they can only be set once during
     * construction.
     */
    constructor (string memory __name, string memory __symbol) public {
        _name = __name;
        _symbol = __symbol;
        _decimals = 18;
    }

    /**
     * @dev Returns the name of the token.
     */
    function name() public view returns (string memory) {
        return _name;
    }

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view returns (string memory) {
        return _symbol;
    }

    /**
     * @dev Returns the number of decimals used to get its user representation.
     * For example, if `decimals` equals `2`, a balance of `505` tokens should
     * be displayed to a user as `5,05` (`505 / 10 ** 2`).
     *
     * Tokens usually opt for a value of 18, imitating the relationship between
     * Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
     * called.
     *
     * NOTE: This information is only used for _display_ purposes: it in
     * no way affects any of the arithmetic of the contract, including
     * {IERC20-balanceOf} and {IERC20-transfer}.
     */
    function decimals() public view returns (uint8) {
        return _decimals;
    }

    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply() public view override returns (uint256) {
        return _totalSupply;
    }

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view override returns (uint256) {
        return _balances[account];
    }

    /**
     * @dev See {IERC20-transfer}.
     *
     * Requirements:
     *
     * - `recipient` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

    /**
     * @dev See {IERC20-allowance}.
     */
    function allowance(address owner, address spender) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }

    /**
     * @dev See {IERC20-approve}.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.approve(address spender, uint256 amount)
     */
    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }

    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {ERC20};
     *
     * Requirements:
     * - `sender` and `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     * - the caller must have allowance for `sender`'s tokens of at least
     * `amount`.
     */
    function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(sender, recipient, amount);
        _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
        return true;
    }

    /**
     * @dev Atomically increases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
        return true;
    }

    /**
     * @dev Atomically decreases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `spender` must have allowance for the caller of at least
     * `subtractedValue`.
     */
    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
        return true;
    }

    /**
     * @dev Moves tokens `amount` from `sender` to `recipient`.
     *
     * This is internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * Requirements:
     *
     * - `sender` cannot be the zero address.
     * - `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     */
    function _transfer(address sender, address recipient, uint256 amount) internal virtual {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");

        _beforeTokenTransfer(sender, recipient, amount);

        _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
        _balances[recipient] = _balances[recipient].add(amount);
        emit Transfer(sender, recipient, amount);
    }

    /** @dev Creates `amount` tokens and assigns them to `account`, increasing
     * the total supply.
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * Requirements
     *
     * - `to` cannot be the zero address.
     */
    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");

        _beforeTokenTransfer(address(0), account, amount);

        _totalSupply = _totalSupply.add(amount);
        _balances[account] = _balances[account].add(amount);
        emit Transfer(address(0), account, amount);
    }

    /**
     * @dev Destroys `amount` tokens from the caller.
     *
     * See {ERC20-_burn}.
     */
    function burn(uint256 amount) public virtual {
        _burn(_msgSender(), amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`, deducting from the caller's
     * allowance.
     *
     * See {ERC20-_burn} and {ERC20-allowance}.
     *
     * Requirements:
     *
     * - the caller must have allowance for `accounts`'s tokens of at least
     * `amount`.
     */
    function burnFrom(address account, uint256 amount) public virtual {
        uint256 decreasedAllowance = allowance(account, _msgSender()).sub(amount, "ERC20: burn amount exceeds allowance");

        _approve(account, _msgSender(), decreasedAllowance);
        _burn(account, amount);
    }


    /**
     * @dev Destroys `amount` tokens from `account`, reducing the
     * total supply.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * Requirements
     *
     * - `account` cannot be the zero address.
     * - `account` must have at least `amount` tokens.
     */
    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");

        _beforeTokenTransfer(account, address(0), amount);

        _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
        _totalSupply = _totalSupply.sub(amount);
        emit Transfer(account, address(0), amount);
    }

    /**
     * @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.
     *
     * This is internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     */
    function _approve(address owner, address spender, uint256 amount) internal virtual {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");

        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`.`amount` is then deducted
     * from the caller's allowance.
     *
     * See {_burn} and {_approve}.
     */
    function _burnFrom(address account, uint256 amount) internal virtual {
        _burn(account, amount);
        _approve(account, _msgSender(), _allowances[account][_msgSender()].sub(amount, "ERC20: burn amount exceeds allowance"));
    }

    /**
     * @dev Hook that is called before any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of `from`'s tokens
     * will be to transferred to `to`.
     * - when `from` is zero, `amount` tokens will be minted for `to`.
     * - when `to` is zero, `amount` of `from`'s tokens will be burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:using-hooks.adoc[Using Hooks].
     */
    function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
}


// File contracts/Uniswap_V3/pool/IUniswapV3PoolActions.sol


/// @title Permissionless pool actions
/// @notice Contains pool methods that can be called by anyone
interface IUniswapV3PoolActions {
    /// @notice Sets the initial price for the pool
    /// @dev Price is represented as a sqrt(amountToken1/amountToken0) Q64.96 value
    /// @param sqrtPriceX96 the initial sqrt price of the pool as a Q64.96
    function initialize(uint160 sqrtPriceX96) external;

    /// @notice Adds liquidity for the given recipient/tickLower/tickUpper position
    /// @dev The caller of this method receives a callback in the form of IUniswapV3MintCallback#uniswapV3MintCallback
    /// in which they must pay any token0 or token1 owed for the liquidity. The amount of token0/token1 due depends
    /// on tickLower, tickUpper, the amount of liquidity, and the current price.
    /// @param recipient The address for which the liquidity will be created
    /// @param tickLower The lower tick of the position in which to add liquidity
    /// @param tickUpper The upper tick of the position in which to add liquidity
    /// @param amount The amount of liquidity to mint
    /// @param data Any data that should be passed through to the callback
    /// @return amount0 The amount of token0 that was paid to mint the given amount of liquidity. Matches the value in the callback
    /// @return amount1 The amount of token1 that was paid to mint the given amount of liquidity. Matches the value in the callback
    function mint(
        address recipient,
        int24 tickLower,
        int24 tickUpper,
        uint128 amount,
        bytes calldata data
    ) external returns (uint256 amount0, uint256 amount1);

    /// @notice Collects tokens owed to a position
    /// @dev Does not recompute fees earned, which must be done either via mint or burn of any amount of liquidity.
    /// Collect must be called by the position owner. To withdraw only token0 or only token1, amount0Requested or
    /// amount1Requested may be set to zero. To withdraw all tokens owed, caller may pass any value greater than the
    /// actual tokens owed, e.g. type(uint128).max. Tokens owed may be from accumulated swap fees or burned liquidity.
    /// @param recipient The address which should receive the fees collected
    /// @param tickLower The lower tick of the position for which to collect fees
    /// @param tickUpper The upper tick of the position for which to collect fees
    /// @param amount0Requested How much token0 should be withdrawn from the fees owed
    /// @param amount1Requested How much token1 should be withdrawn from the fees owed
    /// @return amount0 The amount of fees collected in token0
    /// @return amount1 The amount of fees collected in token1
    function collect(
        address recipient,
        int24 tickLower,
        int24 tickUpper,
        uint128 amount0Requested,
        uint128 amount1Requested
    ) external returns (uint128 amount0, uint128 amount1);

    /// @notice Burn liquidity from the sender and account tokens owed for the liquidity to the position
    /// @dev Can be used to trigger a recalculation of fees owed to a position by calling with an amount of 0
    /// @dev Fees must be collected separately via a call to #collect
    /// @param tickLower The lower tick of the position for which to burn liquidity
    /// @param tickUpper The upper tick of the position for which to burn liquidity
    /// @param amount How much liquidity to burn
    /// @return amount0 The amount of token0 sent to the recipient
    /// @return amount1 The amount of token1 sent to the recipient
    function burn(
        int24 tickLower,
        int24 tickUpper,
        uint128 amount
    ) external returns (uint256 amount0, uint256 amount1);

    /// @notice Swap token0 for token1, or token1 for token0
    /// @dev The caller of this method receives a callback in the form of IUniswapV3SwapCallback#uniswapV3SwapCallback
    /// @param recipient The address to receive the output of the swap
    /// @param zeroForOne The direction of the swap, true for token0 to token1, false for token1 to token0
    /// @param amountSpecified The amount of the swap, which implicitly configures the swap as exact input (positive), or exact output (negative)
    /// @param sqrtPriceLimitX96 The Q64.96 sqrt price limit. If zero for one, the price cannot be less than this
    /// value after the swap. If one for zero, the price cannot be greater than this value after the swap
    /// @param data Any data to be passed through to the callback
    /// @return amount0 The delta of the balance of token0 of the pool, exact when negative, minimum when positive
    /// @return amount1 The delta of the balance of token1 of the pool, exact when negative, minimum when positive
    function swap(
        address recipient,
        bool zeroForOne,
        int256 amountSpecified,
        uint160 sqrtPriceLimitX96,
        bytes calldata data
    ) external returns (int256 amount0, int256 amount1);

    /// @notice Receive token0 and/or token1 and pay it back, plus a fee, in the callback
    /// @dev The caller of this method receives a callback in the form of IUniswapV3FlashCallback#uniswapV3FlashCallback
    /// @dev Can be used to donate underlying tokens pro-rata to currently in-range liquidity providers by calling
    /// with 0 amount{0,1} and sending the donation amount(s) from the callback
    /// @param recipient The address which will receive the token0 and token1 amounts
    /// @param amount0 The amount of token0 to send
    /// @param amount1 The amount of token1 to send
    /// @param data Any data to be passed through to the callback
    function flash(
        address recipient,
        uint256 amount0,
        uint256 amount1,
        bytes calldata data
    ) external;

    /// @notice Increase the maximum number of price and liquidity observations that this pool will store
    /// @dev This method is no-op if the pool already has an observationCardinalityNext greater than or equal to
    /// the input observationCardinalityNext.
    /// @param observationCardinalityNext The desired minimum number of observations for the pool to store
    function increaseObservationCardinalityNext(uint16 observationCardinalityNext) external;
}


// File contracts/Uniswap_V3/pool/IUniswapV3PoolDerivedState.sol


/// @title Pool state that is not stored
/// @notice Contains view functions to provide information about the pool that is computed rather than stored on the
/// blockchain. The functions here may have variable gas costs.
interface IUniswapV3PoolDerivedState {
    /// @notice Returns the cumulative tick and liquidity as of each timestamp `secondsAgo` from the current block timestamp
    /// @dev To get a time weighted average tick or liquidity-in-range, you must call this with two values, one representing
    /// the beginning of the period and another for the end of the period. E.g., to get the last hour time-weighted average tick,
    /// you must call it with secondsAgos = [3600, 0].
    /// @dev The time weighted average tick represents the geometric time weighted average price of the pool, in
    /// log base sqrt(1.0001) of token1 / token0. The TickMath library can be used to go from a tick value to a ratio.
    /// @param secondsAgos From how long ago each cumulative tick and liquidity value should be returned
    /// @return tickCumulatives Cumulative tick values as of each `secondsAgos` from the current block timestamp
    /// @return secondsPerLiquidityCumulativeX128s Cumulative seconds per liquidity-in-range value as of each `secondsAgos` from the current block
    /// timestamp
    function observe(uint32[] calldata secondsAgos)
        external
        view
        returns (int56[] memory tickCumulatives, uint160[] memory secondsPerLiquidityCumulativeX128s);

    /// @notice Returns a snapshot of the tick cumulative, seconds per liquidity and seconds inside a tick range
    /// @dev Snapshots must only be compared to other snapshots, taken over a period for which a position existed.
    /// I.e., snapshots cannot be compared if a position is not held for the entire period between when the first
    /// snapshot is taken and the second snapshot is taken.
    /// @param tickLower The lower tick of the range
    /// @param tickUpper The upper tick of the range
    /// @return tickCumulativeInside The snapshot of the tick accumulator for the range
    /// @return secondsPerLiquidityInsideX128 The snapshot of seconds per liquidity for the range
    /// @return secondsInside The snapshot of seconds per liquidity for the range
    function snapshotCumulativesInside(int24 tickLower, int24 tickUpper)
        external
        view
        returns (
            int56 tickCumulativeInside,
            uint160 secondsPerLiquidityInsideX128,
            uint32 secondsInside
        );
}


// File contracts/Uniswap_V3/pool/IUniswapV3PoolEvents.sol


/// @title Events emitted by a pool
/// @notice Contains all events emitted by the pool
interface IUniswapV3PoolEvents {
    /// @notice Emitted exactly once by a pool when #initialize is first called on the pool
    /// @dev Mint/Burn/Swap cannot be emitted by the pool before Initialize
    /// @param sqrtPriceX96 The initial sqrt price of the pool, as a Q64.96
    /// @param tick The initial tick of the pool, i.e. log base 1.0001 of the starting price of the pool
    event Initialize(uint160 sqrtPriceX96, int24 tick);

    /// @notice Emitted when liquidity is minted for a given position
    /// @param sender The address that minted the liquidity
    /// @param owner The owner of the position and recipient of any minted liquidity
    /// @param tickLower The lower tick of the position
    /// @param tickUpper The upper tick of the position
    /// @param amount The amount of liquidity minted to the position range
    /// @param amount0 How much token0 was required for the minted liquidity
    /// @param amount1 How much token1 was required for the minted liquidity
    event Mint(
        address sender,
        address indexed owner,
        int24 indexed tickLower,
        int24 indexed tickUpper,
        uint128 amount,
        uint256 amount0,
        uint256 amount1
    );

    /// @notice Emitted when fees are collected by the owner of a position
    /// @dev Collect events may be emitted with zero amount0 and amount1 when the caller chooses not to collect fees
    /// @param owner The owner of the position for which fees are collected
    /// @param tickLower The lower tick of the position
    /// @param tickUpper The upper tick of the position
    /// @param amount0 The amount of token0 fees collected
    /// @param amount1 The amount of token1 fees collected
    event Collect(
        address indexed owner,
        address recipient,
        int24 indexed tickLower,
        int24 indexed tickUpper,
        uint128 amount0,
        uint128 amount1
    );

    /// @notice Emitted when a position's liquidity is removed
    /// @dev Does not withdraw any fees earned by the liquidity position, which must be withdrawn via #collect
    /// @param owner The owner of the position for which liquidity is removed
    /// @param tickLower The lower tick of the position
    /// @param tickUpper The upper tick of the position
    /// @param amount The amount of liquidity to remove
    /// @param amount0 The amount of token0 withdrawn
    /// @param amount1 The amount of token1 withdrawn
    event Burn(
        address indexed owner,
        int24 indexed tickLower,
        int24 indexed tickUpper,
        uint128 amount,
        uint256 amount0,
        uint256 amount1
    );

    /// @notice Emitted by the pool for any swaps between token0 and token1
    /// @param sender The address that initiated the swap call, and that received the callback
    /// @param recipient The address that received the output of the swap
    /// @param amount0 The delta of the token0 balance of the pool
    /// @param amount1 The delta of the token1 balance of the pool
    /// @param sqrtPriceX96 The sqrt(price) of the pool after the swap, as a Q64.96
    /// @param liquidity The liquidity of the pool after the swap
    /// @param tick The log base 1.0001 of price of the pool after the swap
    event Swap(
        address indexed sender,
        address indexed recipient,
        int256 amount0,
        int256 amount1,
        uint160 sqrtPriceX96,
        uint128 liquidity,
        int24 tick
    );

    /// @notice Emitted by the pool for any flashes of token0/token1
    /// @param sender The address that initiated the swap call, and that received the callback
    /// @param recipient The address that received the tokens from flash
    /// @param amount0 The amount of token0 that was flashed
    /// @param amount1 The amount of token1 that was flashed
    /// @param paid0 The amount of token0 paid for the flash, which can exceed the amount0 plus the fee
    /// @param paid1 The amount of token1 paid for the flash, which can exceed the amount1 plus the fee
    event Flash(
        address indexed sender,
        address indexed recipient,
        uint256 amount0,
        uint256 amount1,
        uint256 paid0,
        uint256 paid1
    );

    /// @notice Emitted by the pool for increases to the number of observations that can be stored
    /// @dev observationCardinalityNext is not the observation cardinality until an observation is written at the index
    /// just before a mint/swap/burn.
    /// @param observationCardinalityNextOld The previous value of the next observation cardinality
    /// @param observationCardinalityNextNew The updated value of the next observation cardinality
    event IncreaseObservationCardinalityNext(
        uint16 observationCardinalityNextOld,
        uint16 observationCardinalityNextNew
    );

    /// @notice Emitted when the protocol fee is changed by the pool
    /// @param feeProtocol0Old The previous value of the token0 protocol fee
    /// @param feeProtocol1Old The previous value of the token1 protocol fee
    /// @param feeProtocol0New The updated value of the token0 protocol fee
    /// @param feeProtocol1New The updated value of the token1 protocol fee
    event SetFeeProtocol(uint8 feeProtocol0Old, uint8 feeProtocol1Old, uint8 feeProtocol0New, uint8 feeProtocol1New);

    /// @notice Emitted when the collected protocol fees are withdrawn by the factory owner
    /// @param sender The address that collects the protocol fees
    /// @param recipient The address that receives the collected protocol fees
    /// @param amount0 The amount of token0 protocol fees that is withdrawn
    /// @param amount0 The amount of token1 protocol fees that is withdrawn
    event CollectProtocol(address indexed sender, address indexed recipient, uint128 amount0, uint128 amount1);
}


// File contracts/Uniswap_V3/pool/IUniswapV3PoolImmutables.sol


/// @title Pool state that never changes
/// @notice These parameters are fixed for a pool forever, i.e., the methods will always return the same values
interface IUniswapV3PoolImmutables {
    /// @notice The contract that deployed the pool, which must adhere to the IUniswapV3Factory interface
    /// @return The contract address
    function factory() external view returns (address);

    /// @notice The first of the two tokens of the pool, sorted by address
    /// @return The token contract address
    function token0() external view returns (address);

    /// @notice The second of the two tokens of the pool, sorted by address
    /// @return The token contract address
    function token1() external view returns (address);

    /// @notice The pool's fee in hundredths of a bip, i.e. 1e-6
    /// @return The fee
    function fee() external view returns (uint24);

    /// @notice The pool tick spacing
    /// @dev Ticks can only be used at multiples of this value, minimum of 1 and always positive
    /// e.g.: a tickSpacing of 3 means ticks can be initialized every 3rd tick, i.e., ..., -6, -3, 0, 3, 6, ...
    /// This value is an int24 to avoid casting even though it is always positive.
    /// @return The tick spacing
    function tickSpacing() external view returns (int24);

    /// @notice The maximum amount of position liquidity that can use any tick in the range
    /// @dev This parameter is enforced per tick to prevent liquidity from overflowing a uint128 at any point, and
    /// also prevents out-of-range liquidity from being used to prevent adding in-range liquidity to a pool
    /// @return The max amount of liquidity per tick
    function maxLiquidityPerTick() external view returns (uint128);
}


// File contracts/Uniswap_V3/pool/IUniswapV3PoolOwnerActions.sol


/// @title Permissioned pool actions
/// @notice Contains pool methods that may only be called by the factory owner
interface IUniswapV3PoolOwnerActions {
    /// @notice Set the denominator of the protocol's % share of the fees
    /// @param feeProtocol0 new protocol fee for token0 of the pool
    /// @param feeProtocol1 new protocol fee for token1 of the pool
    function setFeeProtocol(uint8 feeProtocol0, uint8 feeProtocol1) external;

    /// @notice Collect the protocol fee accrued to the pool
    /// @param recipient The address to which collected protocol fees should be sent
    /// @param amount0Requested The maximum amount of token0 to send, can be 0 to collect fees in only token1
    /// @param amount1Requested The maximum amount of token1 to send, can be 0 to collect fees in only token0
    /// @return amount0 The protocol fee collected in token0
    /// @return amount1 The protocol fee collected in token1
    function collectProtocol(
        address recipient,
        uint128 amount0Requested,
        uint128 amount1Requested
    ) external returns (uint128 amount0, uint128 amount1);
}


// File contracts/Uniswap_V3/pool/IUniswapV3PoolState.sol


/// @title Pool state that can change
/// @notice These methods compose the pool's state, and can change with any frequency including multiple times
/// per transaction
interface IUniswapV3PoolState {
    /// @notice The 0th storage slot in the pool stores many values, and is exposed as a single method to save gas
    /// when accessed externally.
    /// @return sqrtPriceX96 The current price of the pool as a sqrt(token1/token0) Q64.96 value
    /// tick The current tick of the pool, i.e. according to the last tick transition that was run.
    /// This value may not always be equal to SqrtTickMath.getTickAtSqrtRatio(sqrtPriceX96) if the price is on a tick
    /// boundary.
    /// observationIndex The index of the last oracle observation that was written,
    /// observationCardinality The current maximum number of observations stored in the pool,
    /// observationCardinalityNext The next maximum number of observations, to be updated when the observation.
    /// feeProtocol The protocol fee for both tokens of the pool.
    /// Encoded as two 4 bit values, where the protocol fee of token1 is shifted 4 bits and the protocol fee of token0
    /// is the lower 4 bits. Used as the denominator of a fraction of the swap fee, e.g. 4 means 1/4th of the swap fee.
    /// unlocked Whether the pool is currently locked to reentrancy
    function slot0()
        external
        view
        returns (
            uint160 sqrtPriceX96,
            int24 tick,
            uint16 observationIndex,
            uint16 observationCardinality,
            uint16 observationCardinalityNext,
            uint8 feeProtocol,
            bool unlocked
        );

    /// @notice The fee growth as a Q128.128 fees of token0 collected per unit of liquidity for the entire life of the pool
    /// @dev This value can overflow the uint256
    function feeGrowthGlobal0X128() external view returns (uint256);

    /// @notice The fee growth as a Q128.128 fees of token1 collected per unit of liquidity for the entire life of the pool
    /// @dev This value can overflow the uint256
    function feeGrowthGlobal1X128() external view returns (uint256);

    /// @notice The amounts of token0 and token1 that are owed to the protocol
    /// @dev Protocol fees will never exceed uint128 max in either token
    function protocolFees() external view returns (uint128 token0, uint128 token1);

    /// @notice The currently in range liquidity available to the pool
    /// @dev This value has no relationship to the total liquidity across all ticks
    function liquidity() external view returns (uint128);

    /// @notice Look up information about a specific tick in the pool
    /// @param tick The tick to look up
    /// @return liquidityGross the total amount of position liquidity that uses the pool either as tick lower or
    /// tick upper,
    /// liquidityNet how much liquidity changes when the pool price crosses the tick,
    /// feeGrowthOutside0X128 the fee growth on the other side of the tick from the current tick in token0,
    /// feeGrowthOutside1X128 the fee growth on the other side of the tick from the current tick in token1,
    /// tickCumulativeOutside the cumulative tick value on the other side of the tick from the current tick
    /// secondsPerLiquidityOutsideX128 the seconds spent per liquidity on the other side of the tick from the current tick,
    /// secondsOutside the seconds spent on the other side of the tick from the current tick,
    /// initialized Set to true if the tick is initialized, i.e. liquidityGross is greater than 0, otherwise equal to false.
    /// Outside values can only be used if the tick is initialized, i.e. if liquidityGross is greater than 0.
    /// In addition, these values are only relative and must be used only in comparison to previous snapshots for
    /// a specific position.
    function ticks(int24 tick)
        external
        view
        returns (
            uint128 liquidityGross,
            int128 liquidityNet,
            uint256 feeGrowthOutside0X128,
            uint256 feeGrowthOutside1X128,
            int56 tickCumulativeOutside,
            uint160 secondsPerLiquidityOutsideX128,
            uint32 secondsOutside,
            bool initialized
        );

    /// @notice Returns 256 packed tick initialized boolean values. See TickBitmap for more information
    function tickBitmap(int16 wordPosition) external view returns (uint256);

    /// @notice Returns the information about a position by the position's key
    /// @param key The position's key is a hash of a preimage composed by the owner, tickLower and tickUpper
    /// @return _liquidity The amount of liquidity in the position,
    /// Returns feeGrowthInside0LastX128 fee growth of token0 inside the tick range as of the last mint/burn/poke,
    /// Returns feeGrowthInside1LastX128 fee growth of token1 inside the tick range as of the last mint/burn/poke,
    /// Returns tokensOwed0 the computed amount of token0 owed to the position as of the last mint/burn/poke,
    /// Returns tokensOwed1 the computed amount of token1 owed to the position as of the last mint/burn/poke
    function positions(bytes32 key)
        external
        view
        returns (
            uint128 _liquidity,
            uint256 feeGrowthInside0LastX128,
            uint256 feeGrowthInside1LastX128,
            uint128 tokensOwed0,
            uint128 tokensOwed1
        );

    /// @notice Returns data about a specific observation index
    /// @param index The element of the observations array to fetch
    /// @dev You most likely want to use #observe() instead of this method to get an observation as of some amount of time
    /// ago, rather than at a specific index in the array.
    /// @return blockTimestamp The timestamp of the observation,
    /// Returns tickCumulative the tick multiplied by seconds elapsed for the life of the pool as of the observation timestamp,
    /// Returns secondsPerLiquidityCumulativeX128 the seconds per in range liquidity for the life of the pool as of the observation timestamp,
    /// Returns initialized whether the observation has been initialized and the values are safe to use
    function observations(uint256 index)
        external
        view
        returns (
            uint32 blockTimestamp,
            int56 tickCumulative,
            uint160 secondsPerLiquidityCumulativeX128,
            bool initialized
        );
}


// File contracts/Uniswap_V3/IUniswapV3Pool.sol







/// @title The interface for a Uniswap V3 Pool
/// @notice A Uniswap pool facilitates swapping and automated market making between any two assets that strictly conform
/// to the ERC20 specification
/// @dev The pool interface is broken up into many smaller pieces
interface IUniswapV3Pool is
    IUniswapV3PoolImmutables,
    IUniswapV3PoolState,
    IUniswapV3PoolDerivedState,
    IUniswapV3PoolActions,
    IUniswapV3PoolOwnerActions,
    IUniswapV3PoolEvents
{

}


// File contracts/Misc_AMOs/bunni/IBunniLens.sol


interface IBunniLens {
    struct BunniKey {
        IUniswapV3Pool pool;
        int24 tickLower;
        int24 tickUpper;
    }

    function getReserves (BunniKey calldata key) external view returns (uint112 reserve0, uint112 reserve1);
    function hub () external view returns (address);
    function pricePerFullShare (BunniKey calldata key) external view returns (uint128 liquidity, uint256 amount0, uint256 amount1);
}


// File contracts/Misc_AMOs/kyberswap_v2/pool/IPoolActions.sol


interface IPoolActions {
  /// @notice Sets the initial price for the pool and seeds reinvestment liquidity
  /// @dev Assumes the caller has sent the necessary token amounts
  /// required for initializing reinvestment liquidity prior to calling this function
  /// @param initialSqrtP the initial sqrt price of the pool
  /// @param qty0 token0 quantity sent to and locked permanently in the pool
  /// @param qty1 token1 quantity sent to and locked permanently in the pool
  function unlockPool(uint160 initialSqrtP) external returns (uint256 qty0, uint256 qty1);

  /// @notice Adds liquidity for the specified recipient/tickLower/tickUpper position
  /// @dev Any token0 or token1 owed for the liquidity provision have to be paid for when
  /// the IMintCallback#mintCallback is called to this method's caller
  /// The quantity of token0/token1 to be sent depends on
  /// tickLower, tickUpper, the amount of liquidity, and the current price of the pool.
  /// Also sends reinvestment tokens (fees) to the recipient for any fees collected
  /// while the position is in range
  /// Reinvestment tokens have to be burnt via #burnRTokens in exchange for token0 and token1
  /// @param recipient Address for which the added liquidity is credited to
  /// @param tickLower Recipient position's lower tick
  /// @param tickUpper Recipient position's upper tick
  /// @param ticksPrevious The nearest tick that is initialized and <= the lower & upper ticks
  /// @param qty Liquidity quantity to mint
  /// @param data Data (if any) to be passed through to the callback
  /// @return qty0 token0 quantity sent to the pool in exchange for the minted liquidity
  /// @return qty1 token1 quantity sent to the pool in exchange for the minted liquidity
  /// @return feeGrowthInside position's updated feeGrowthInside value
  function mint(
    address recipient,
    int24 tickLower,
    int24 tickUpper,
    int24[2] calldata ticksPrevious,
    uint128 qty,
    bytes calldata data
  )
    external
    returns (
      uint256 qty0,
      uint256 qty1,
      uint256 feeGrowthInside
    );

  /// @notice Remove liquidity from the caller
  /// Also sends reinvestment tokens (fees) to the caller for any fees collected
  /// while the position is in range
  /// Reinvestment tokens have to be burnt via #burnRTokens in exchange for token0 and token1
  /// @param tickLower Position's lower tick for which to burn liquidity
  /// @param tickUpper Position's upper tick for which to burn liquidity
  /// @param qty Liquidity quantity to burn
  /// @return qty0 token0 quantity sent to the caller
  /// @return qty1 token1 quantity sent to the caller
  /// @return feeGrowthInside position's updated feeGrowthInside value
  function burn(
    int24 tickLower,
    int24 tickUpper,
    uint128 qty
  )
    external
    returns (
      uint256 qty0,
      uint256 qty1,
      uint256 feeGrowthInside
    );

  /// @notice Burns reinvestment tokens in exchange to receive the fees collected in token0 and token1
  /// @param qty Reinvestment token quantity to burn
  /// @param isLogicalBurn true if burning rTokens without returning any token0/token1
  ///         otherwise should transfer token0/token1 to sender
  /// @return qty0 token0 quantity sent to the caller for burnt reinvestment tokens
  /// @return qty1 token1 quantity sent to the caller for burnt reinvestment tokens
  function burnRTokens(uint256 qty, bool isLogicalBurn)
    external
    returns (uint256 qty0, uint256 qty1);

  /// @notice Swap token0 -> token1, or vice versa
  /// @dev This method's caller receives a callback in the form of ISwapCallback#swapCallback
  /// @dev swaps will execute up to limitSqrtP or swapQty is fully used
  /// @param recipient The address to receive the swap output
  /// @param swapQty The swap quantity, which implicitly configures the swap as exact input (>0), or exact output (<0)
  /// @param isToken0 Whether the swapQty is specified in token0 (true) or token1 (false)
  /// @param limitSqrtP the limit of sqrt price after swapping
  /// could be MAX_SQRT_RATIO-1 when swapping 1 -> 0 and MIN_SQRT_RATIO+1 when swapping 0 -> 1 for no limit swap
  /// @param data Any data to be passed through to the callback
  /// @return qty0 Exact token0 qty sent to recipient if < 0. Minimally received quantity if > 0.
  /// @return qty1 Exact token1 qty sent to recipient if < 0. Minimally received quantity if > 0.
  function swap(
    address recipient,
    int256 swapQty,
    bool isToken0,
    uint160 limitSqrtP,
    bytes calldata data
  ) external returns (int256 qty0, int256 qty1);

  /// @notice Receive token0 and/or token1 and pay it back, plus a fee, in the callback
  /// @dev The caller of this method receives a callback in the form of IFlashCallback#flashCallback
  /// @dev Fees collected are sent to the feeTo address if it is set in Factory
  /// @param recipient The address which will receive the token0 and token1 quantities
  /// @param qty0 token0 quantity to be loaned to the recipient
  /// @param qty1 token1 quantity to be loaned to the recipient
  /// @param data Any data to be passed through to the callback
  function flash(
    address recipient,
    uint256 qty0,
    uint256 qty1,
    bytes calldata data
  ) external;


  /// @notice sync fee of position
  /// @param tickLower Position's lower tick
  /// @param tickUpper Position's upper tick
  function tweakPosZeroLiq(int24 tickLower, int24 tickUpper)
    external returns(uint256 feeGrowthInsideLast);
}


// File contracts/Misc_AMOs/kyberswap_v2/pool/IPoolEvents.sol


interface IPoolEvents {
  /// @notice Emitted only once per pool when #initialize is first called
  /// @dev Mint/Burn/Swap cannot be emitted by the pool before Initialize
  /// @param sqrtP The initial price of the pool
  /// @param tick The initial tick of the pool
  event Initialize(uint160 sqrtP, int24 tick);

  /// @notice Emitted when liquidity is minted for a given position
  /// @dev transfers reinvestment tokens for any collected fees earned by the position
  /// @param sender address that minted the liquidity
  /// @param owner address of owner of the position
  /// @param tickLower position's lower tick
  /// @param tickUpper position's upper tick
  /// @param qty liquidity minted to the position range
  /// @param qty0 token0 quantity needed to mint the liquidity
  /// @param qty1 token1 quantity needed to mint the liquidity
  event Mint(
    address sender,
    address indexed owner,
    int24 indexed tickLower,
    int24 indexed tickUpper,
    uint128 qty,
    uint256 qty0,
    uint256 qty1
  );

  /// @notice Emitted when a position's liquidity is removed
  /// @dev transfers reinvestment tokens for any collected fees earned by the position
  /// @param owner address of owner of the position
  /// @param tickLower position's lower tick
  /// @param tickUpper position's upper tick
  /// @param qty liquidity removed
  /// @param qty0 token0 quantity withdrawn from removal of liquidity
  /// @param qty1 token1 quantity withdrawn from removal of liquidity
  event Burn(
    address indexed owner,
    int24 indexed tickLower,
    int24 indexed tickUpper,
    uint128 qty,
    uint256 qty0,
    uint256 qty1
  );

  /// @notice Emitted when reinvestment tokens are burnt
  /// @param owner address which burnt the reinvestment tokens
  /// @param qty reinvestment token quantity burnt
  /// @param qty0 token0 quantity sent to owner for burning reinvestment tokens
  /// @param qty1 token1 quantity sent to owner for burning reinvestment tokens
  event BurnRTokens(address indexed owner, uint256 qty, uint256 qty0, uint256 qty1);

  /// @notice Emitted for swaps by the pool between token0 and token1
  /// @param sender Address that initiated the swap call, and that received the callback
  /// @param recipient Address that received the swap output
  /// @param deltaQty0 Change in pool's token0 balance
  /// @param deltaQty1 Change in pool's token1 balance
  /// @param sqrtP Pool's sqrt price after the swap
  /// @param liquidity Pool's liquidity after the swap
  /// @param currentTick Log base 1.0001 of pool's price after the swap
  event Swap(
    address indexed sender,
    address indexed recipient,
    int256 deltaQty0,
    int256 deltaQty1,
    uint160 sqrtP,
    uint128 liquidity,
    int24 currentTick
  );

  /// @notice Emitted by the pool for any flash loans of token0/token1
  /// @param sender The address that initiated the flash loan, and that received the callback
  /// @param recipient The address that received the flash loan quantities
  /// @param qty0 token0 quantity loaned to the recipient
  /// @param qty1 token1 quantity loaned to the recipient
  /// @param paid0 token0 quantity paid for the flash, which can exceed qty0 + fee
  /// @param paid1 token1 quantity paid for the flash, which can exceed qty0 + fee
  event Flash(
    address indexed sender,
    address indexed recipient,
    uint256 qty0,
    uint256 qty1,
    uint256 paid0,
    uint256 paid1
  );
}



// File contracts/Misc_AMOs/kyberswap_v2/IFactory.sol


/// @title KyberSwap v2 factory
/// @notice Deploys KyberSwap v2 pools and manages control over government fees
interface IFactory {
  /// @notice Emitted when a pool is created
  /// @param token0 First pool token by address sort order
  /// @param token1 Second pool token by address sort order
  /// @param swapFeeUnits Fee to be collected upon every swap in the pool, in fee units
  /// @param tickDistance Minimum number of ticks between initialized ticks
  /// @param pool The address of the created pool
  event PoolCreated(
    address indexed token0,
    address indexed token1,
    uint24 indexed swapFeeUnits,
    int24 tickDistance,
    address pool
  );

  /// @notice Emitted when a new fee is enabled for pool creation via the factory
  /// @param swapFeeUnits Fee to be collected upon every swap in the pool, in fee units
  /// @param tickDistance Minimum number of ticks between initialized ticks for pools created with the given fee
  event SwapFeeEnabled(uint24 indexed swapFeeUnits, int24 indexed tickDistance);

  /// @notice Emitted when vesting period changes
  /// @param vestingPeriod The maximum time duration for which LP fees
  /// are proportionally burnt upon LP removals
  event VestingPeriodUpdated(uint32 vestingPeriod);

  /// @notice Emitted when configMaster changes
  /// @param oldConfigMaster configMaster before the update
  /// @param newConfigMaster configMaster after the update
  event ConfigMasterUpdated(address oldConfigMaster, address newConfigMaster);

  /// @notice Emitted when fee configuration changes
  /// @param feeTo Recipient of government fees
  /// @param governmentFeeUnits Fee amount, in fee units,
  /// to be collected out of the fee charged for a pool swap
  event FeeConfigurationUpdated(address feeTo, uint24 governmentFeeUnits);

  /// @notice Emitted when whitelist feature is enabled
  event WhitelistEnabled();

  /// @notice Emitted when whitelist feature is disabled
  event WhitelistDisabled();

  /// @notice Returns the maximum time duration for which LP fees
  /// are proportionally burnt upon LP removals
  function vestingPeriod() external view returns (uint32);

  /// @notice Returns the tick distance for a specified fee.
  /// @dev Once added, cannot be updated or removed.
  /// @param swapFeeUnits Swap fee, in fee units.
  /// @return The tick distance. Returns 0 if fee has not been added.
  function feeAmountTickDistance(uint24 swapFeeUnits) external view returns (int24);

  /// @notice Returns the address which can update the fee configuration
  function configMaster() external view returns (address);

  /// @notice Returns the keccak256 hash of the Pool creation code
  /// This is used for pre-computation of pool addresses
  function poolInitHash() external view returns (bytes32);

  /// @notice Returns the pool oracle contract for twap
  function poolOracle() external view returns (address);

  /// @notice Fetches the recipient of government fees
  /// and current government fee charged in fee units
  function feeConfiguration() external view returns (address _feeTo, uint24 _governmentFeeUnits);

  /// @notice Returns the status of whitelisting feature of NFT managers
  /// If true, anyone can mint liquidity tokens
  /// Otherwise, only whitelisted NFT manager(s) are allowed to mint liquidity tokens
  function whitelistDisabled() external view returns (bool);

  //// @notice Returns all whitelisted NFT managers
  /// If the whitelisting feature is turned on,
  /// only whitelisted NFT manager(s) are allowed to mint liquidity tokens
  function getWhitelistedNFTManagers() external view returns (address[] memory);

  /// @notice Checks if sender is a whitelisted NFT manager
  /// If the whitelisting feature is turned on,
  /// only whitelisted NFT manager(s) are allowed to mint liquidity tokens
  /// @param sender address to be checked
  /// @return true if sender is a whistelisted NFT manager, false otherwise
  function isWhitelistedNFTManager(address sender) external view returns (bool);

  /// @notice Returns the pool address for a given pair of tokens and a swap fee
  /// @dev Token order does not matter
  /// @param tokenA Contract address of either token0 or token1
  /// @param tokenB Contract address of the other token
  /// @param swapFeeUnits Fee to be collected upon every swap in the pool, in fee units
  /// @return pool The pool address. Returns null address if it does not exist
  function getPool(
    address tokenA,
    address tokenB,
    uint24 swapFeeUnits
  ) external view returns (address pool);

  /// @notice Fetch parameters to be used for pool creation
  /// @dev Called by the pool constructor to fetch the parameters of the pool
  /// @return factory The factory address
  /// @return poolOracle The pool oracle for twap
  /// @return token0 First pool token by address sort order
  /// @return token1 Second pool token by address sort order
  /// @return swapFeeUnits Fee to be collected upon every swap in the pool, in fee units
  /// @return tickDistance Minimum number of ticks between initialized ticks
  function parameters()
    external
    view
    returns (
      address factory,
      address poolOracle,
      address token0,
      address token1,
      uint24 swapFeeUnits,
      int24 tickDistance
    );

  /// @notice Creates a pool for the given two tokens and fee
  /// @param tokenA One of the two tokens in the desired pool
  /// @param tokenB The other of the two tokens in the desired pool
  /// @param swapFeeUnits Desired swap fee for the pool, in fee units
  /// @dev Token order does not matter. tickDistance is determined from the fee.
  /// Call will revert under any of these conditions:
  ///     1) pool already exists
  ///     2) invalid swap fee
  ///     3) invalid token arguments
  /// @return pool The address of the newly created pool
  function createPool(
    address tokenA,
    address tokenB,
    uint24 swapFeeUnits
  ) external returns (address pool);

  /// @notice Enables a fee amount with the given tickDistance
  /// @dev Fee amounts may never be removed once enabled
  /// @param swapFeeUnits The fee amount to enable, in fee units
  /// @param tickDistance The distance between ticks to be enforced for all pools created with the given fee amount
  function enableSwapFee(uint24 swapFeeUnits, int24 tickDistance) external;

  /// @notice Updates the address which can update the fee configuration
  /// @dev Must be called by the current configMaster
  function updateConfigMaster(address) external;

  /// @notice Updates the vesting period
  /// @dev Must be called by the current configMaster
  function updateVestingPeriod(uint32) external;

  /// @notice Updates the address receiving government fees and fee quantity
  /// @dev Only configMaster is able to perform the update
  /// @param feeTo Address to receive government fees collected from pools
  /// @param governmentFeeUnits Fee amount, in fee units,
  /// to be collected out of the fee charged for a pool swap
  function updateFeeConfiguration(address feeTo, uint24 governmentFeeUnits) external;

  /// @notice Enables the whitelisting feature
  /// @dev Only configMaster is able to perform the update
  function enableWhitelist() external;

  /// @notice Disables the whitelisting feature
  /// @dev Only configMaster is able to perform the update
  function disableWhitelist() external;
}


// File contracts/Misc_AMOs/kyberswap_v2/oracle/IPoolOracle.sol


interface IPoolOracle {
  /// @notice Owner withdrew funds in the pool oracle in case some funds are stuck there
  event OwnerWithdrew(
    address indexed owner,
    address indexed token,
    uint256 indexed amount
  );

  /// @notice Emitted by the Pool Oracle for increases to the number of observations that can be stored
  /// @dev observationCardinalityNext is not the observation cardinality until an observation is written at the index
  /// just before a mint/swap/burn.
  /// @param pool The pool address to update
  /// @param observationCardinalityNextOld The previous value of the next observation cardinality
  /// @param observationCardinalityNextNew The updated value of the next observation cardinality
  event IncreaseObservationCardinalityNext(
    address pool,
    uint16 observationCardinalityNextOld,
    uint16 observationCardinalityNextNew
  );

  /// @notice Initalize observation data for the caller.
  function initializeOracle(uint32 time)
    external
    returns (uint16 cardinality, uint16 cardinalityNext);

  /// @notice Write a new oracle entry into the array
  ///   and update the observation index and cardinality
  /// Read the Oralce.write function for more details
  function writeNewEntry(
    uint16 index,
    uint32 blockTimestamp,
    int24 tick,
    uint128 liquidity,
    uint16 cardinality,
    uint16 cardinalityNext
  )
    external
    returns (uint16 indexUpdated, uint16 cardinalityUpdated);

  /// @notice Write a new oracle entry into the array, take the latest observaion data as inputs
  ///   and update the observation index and cardinality
  /// Read the Oralce.write function for more details
  function write(
    uint32 blockTimestamp,
    int24 tick,
    uint128 liquidity
  )
    external
    returns (uint16 indexUpdated, uint16 cardinalityUpdated);

  /// @notice Increase the maximum number of price observations that this pool will store
  /// @dev This method is no-op if the pool already has an observationCardinalityNext greater than or equal to
  /// the input observationCardinalityNext.
  /// @param pool The pool address to be updated
  /// @param observationCardinalityNext The desired minimum number of observations for the pool to store
  function increaseObservationCardinalityNext(
    address pool,
    uint16 observationCardinalityNext
  )
    external;

  /// @notice Returns the accumulator values as of each time seconds ago from the latest block time in the array of `secondsAgos`
  /// @dev Reverts if `secondsAgos` > oldest observation
  /// @dev It fetches the latest current tick data from the pool
  /// Read the Oracle.observe function for more details
  function observeFromPool(
    address pool,
    uint32[] memory secondsAgos
  )
    external view
    returns (int56[] memory tickCumulatives);

  /// @notice Returns the accumulator values as the time seconds ago from the latest block time of secondsAgo
  /// @dev Reverts if `secondsAgo` > oldest observation
  /// @dev It fetches the latest current tick data from the pool
  /// Read the Oracle.observeSingle function for more details
  function observeSingleFromPool(
    address pool,
    uint32 secondsAgo
  )
    external view
    returns (int56 tickCumulative);

  /// @notice Return the latest pool observation data given the pool address
  function getPoolObservation(address pool)
    external view
    returns (bool initialized, uint16 index, uint16 cardinality, uint16 cardinalityNext);

  /// @notice Returns data about a specific observation index
  /// @param pool The pool address of the observations array to fetch
  /// @param index The element of the observations array to fetch
  /// @dev You most likely want to use #observe() instead of this method to get an observation as of some amount of time
  /// ago, rather than at a specific index in the array.
  /// @return blockTimestamp The timestamp of the observation,
  /// Returns tickCumulative the tick multiplied by seconds elapsed for the life of the pool as of the observation timestamp,
  /// Returns initialized whether the observation has been initialized and the values are safe to use
  function getObservationAt(address pool, uint256 index)
    external view
    returns (
      uint32 blockTimestamp,
      int56 tickCumulative,
      bool initialized
    );
}


// File contracts/Misc_AMOs/kyberswap_v2/pool/IPoolStorage.sol



interface IPoolStorage {
  /// @notice The contract that deployed the pool, which must adhere to the IFactory interface
  /// @return The contract address
  function factory() external view returns (IFactory);

  /// @notice The oracle contract that stores necessary data for price oracle
  /// @return The contract address
  function poolOracle() external view returns (IPoolOracle);

  /// @notice The first of the two tokens of the pool, sorted by address
  /// @return The token contract address
  function token0() external view returns (IERC20);

  /// @notice The second of the two tokens of the pool, sorted by address
  /// @return The token contract address
  function token1() external view returns (IERC20);

  /// @notice The fee to be charged for a swap in basis points
  /// @return The swap fee in basis points
  function swapFeeUnits() external view returns (uint24);

  /// @notice The pool tick distance
  /// @dev Ticks can only be initialized and used at multiples of this value
  /// It remains an int24 to avoid casting even though it is >= 1.
  /// e.g: a tickDistance of 5 means ticks can be initialized every 5th tick, i.e., ..., -10, -5, 0, 5, 10, ...
  /// @return The tick distance
  function tickDistance() external view returns (int24);

  /// @notice Maximum gross liquidity that an initialized tick can have
  /// @dev This is to prevent overflow the pool's active base liquidity (uint128)
  /// also prevents out-of-range liquidity from being used to prevent adding in-range liquidity to a pool
  /// @return The max amount of liquidity per tick
  function maxTickLiquidity() external view returns (uint128);

  /// @notice Look up information about a specific tick in the pool
  /// @param tick The tick to look up
  /// @return liquidityGross total liquidity amount from positions that uses this tick as a lower or upper tick
  /// liquidityNet how much liquidity changes when the pool tick crosses above the tick
  /// feeGrowthOutside the fee growth on the other side of the tick relative to the current tick
  /// secondsPerLiquidityOutside the seconds per unit of liquidity  spent on the other side of the tick relative to the current tick
  function ticks(int24 tick)
    external
    view
    returns (
      uint128 liquidityGross,
      int128 liquidityNet,
      uint256 feeGrowthOutside,
      uint128 secondsPerLiquidityOutside
    );

  /// @notice Returns the previous and next initialized ticks of a specific tick
  /// @dev If specified tick is uninitialized, the returned values are zero.
  /// @param tick The tick to look up
  function initializedTicks(int24 tick) external view returns (int24 previous, int24 next);

  /// @notice Returns the information about a position by the position's key
  /// @return liquidity the liquidity quantity of the position
  /// @return feeGrowthInsideLast fee growth inside the tick range as of the last mint / burn action performed
  function getPositions(
    address owner,
    int24 tickLower,
    int24 tickUpper
  ) external view returns (uint128 liquidity, uint256 feeGrowthInsideLast);

  /// @notice Fetches the pool's prices, ticks and lock status
  /// @return sqrtP sqrt of current price: sqrt(token1/token0)
  /// @return currentTick pool's current tick
  /// @return nearestCurrentTick pool's nearest initialized tick that is <= currentTick
  /// @return locked true if pool is locked, false otherwise
  function getPoolState()
    external
    view
    returns (
      uint160 sqrtP,
      int24 currentTick,
      int24 nearestCurrentTick,
      bool locked
    );

  /// @notice Fetches the pool's liquidity values
  /// @return baseL pool's base liquidity without reinvest liqudity
  /// @return reinvestL the liquidity is reinvested into the pool
  /// @return reinvestLLast last cached value of reinvestL, used for calculating reinvestment token qty
  function getLiquidityState()
    external
    view
    returns (
      uint128 baseL,
      uint128 reinvestL,
      uint128 reinvestLLast
    );

  /// @return feeGrowthGlobal All-time fee growth per unit of liquidity of the pool
  function getFeeGrowthGlobal() external view returns (uint256);

  /// @return secondsPerLiquidityGlobal All-time seconds per unit of liquidity of the pool
  /// @return lastUpdateTime The timestamp in which secondsPerLiquidityGlobal was last updated
  function getSecondsPerLiquidityData()
    external
    view
    returns (uint128 secondsPerLiquidityGlobal, uint32 lastUpdateTime);

  /// @notice Calculates and returns the active time per unit of liquidity until current block.timestamp
  /// @param tickLower The lower tick (of a position)
  /// @param tickUpper The upper tick (of a position)
  /// @return secondsPerLiquidityInside active time (multiplied by 2^96)
  /// between the 2 ticks, per unit of liquidity.
  function getSecondsPerLiquidityInside(int24 tickLower, int24 tickUpper)
    external
    view
    returns (uint128 secondsPerLiquidityInside);
}


// File contracts/Misc_AMOs/kyberswap_v2/IPool.sol




interface IPool is IPoolActions, IPoolEvents, IPoolStorage {}


// File contracts/Misc_AMOs/kyberswap_v2/periphery/base_position_manager/IBasePositionManagerEvents.sol


interface IBasePositionManagerEvents {
  /// @notice Emitted when a token is minted for a given position
  /// @param tokenId the newly minted tokenId
  /// @param poolId poolId of the token
  /// @param liquidity liquidity minted to the position range
  /// @param amount0 token0 quantity needed to mint the liquidity
  /// @param amount1 token1 quantity needed to mint the liquidity
  event MintPosition(
    uint256 indexed tokenId,
    uint80 indexed poolId,
    uint128 liquidity,
    uint256 amount0,
    uint256 amount1
  );

  /// @notice Emitted when a token is burned
  /// @param tokenId id of the token
  event BurnPosition(uint256 indexed tokenId);

  /// @notice Emitted when add liquidity
  /// @param tokenId id of the token
  /// @param liquidity the increase amount of liquidity
  /// @param amount0 token0 quantity needed to increase liquidity
  /// @param amount1 token1 quantity needed to increase liquidity
  /// @param additionalRTokenOwed additional rToken earned
  event AddLiquidity(
    uint256 indexed tokenId,
    uint128 liquidity,
    uint256 amount0,
    uint256 amount1,
    uint256 additionalRTokenOwed
  );

  /// @notice Emitted when remove liquidity
  /// @param tokenId id of the token
  /// @param liquidity the decease amount of liquidity
  /// @param amount0 token0 quantity returned when remove liquidity
  /// @param amount1 token1 quantity returned when remove liquidity
  /// @param additionalRTokenOwed additional rToken earned
  event RemoveLiquidity(
    uint256 indexed tokenId,
    uint128 liquidity,
    uint256 amount0,
    uint256 amount1,
    uint256 additionalRTokenOwed
  );

  /// @notice Emitted when burn position's RToken
  /// @param tokenId id of the token
  /// @param rTokenBurn amount of position's RToken burnt
  event BurnRToken(uint256 indexed tokenId, uint256 rTokenBurn);

  /// @notice Emitted when sync fee growth
  /// @param tokenId id of the token
  /// @param additionalRTokenOwed additional rToken earned
  event SyncFeeGrowth(uint256 indexed tokenId, uint256 additionalRTokenOwed);
}


// File contracts/Misc_AMOs/kyberswap_v2/periphery/IERC721Permit.sol



/// @title ERC721 with permit
/// @notice Extension to ERC721 that includes a permit function for signature based approvals
interface IERC721Permit is IERC721, IERC721Enumerable {
  /// @notice The permit typehash used in the permit signature
  /// @return The typehash for the permit
  function PERMIT_TYPEHASH() external pure returns (bytes32);

  /// @notice The domain separator used in the permit signature
  /// @return The domain seperator used in encoding of permit signature
  function DOMAIN_SEPARATOR() external view returns (bytes32);

  /// @notice Approve of a specific token ID for spending by spender via signature
  /// @param spender The account that is being approved
  /// @param tokenId The ID of the token that is being approved for spending
  /// @param deadline The deadline timestamp by which the call must be mined for the approve to work
  /// @param v Must produce valid secp256k1 signature from the holder along with `r` and `s`
  /// @param r Must produce valid secp256k1 signature from the holder along with `v` and `s`
  /// @param s Must produce valid secp256k1 signature from the holder along with `r` and `v`
  function permit(
    address spender,
    uint256 tokenId,
    uint256 deadline,
    uint8 v,
    bytes32 r,
    bytes32 s
  ) external;

  /**
   * @dev Returns true if this contract implements the interface defined by
   * `interfaceId`. See the corresponding
   * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
   * to learn more about how these ids are created.
   *
   * This function call must use less than 30 000 gas.
   */
  function supportsInterface(bytes4 interfaceId) external view returns (bool);
}


// File contracts/Misc_AMOs/kyberswap_v2/periphery/IRouterTokenHelper.sol


interface IRouterTokenHelper {
  /// @notice Unwraps the contract's WETH balance and sends it to recipient as ETH.
  /// @dev The minAmount parameter prevents malicious contracts from stealing WETH from users.
  /// @param minAmount The minimum amount of WETH to unwrap
  /// @param recipient The address receiving ETH
  function unwrapWeth(uint256 minAmount, address recipient) external payable;

  /// @notice Refunds any ETH balance held by this contract to the `msg.sender`
  /// @dev Useful for bundling with mint or increase liquidity that uses ether, or exact output swaps
  /// that use ether for the input amount
  function refundEth() external payable;

  /// @notice Transfers the full amount of a token held by this contract to recipient
  /// @dev The minAmount parameter prevents malicious contracts from stealing the token from users
  /// @param token The contract address of the token which will be transferred to `recipient`
  /// @param minAmount The minimum amount of token required for a transfer
  /// @param recipient The destination address of the token
  function transferAllTokens(
    address token,
    uint256 minAmount,
    address recipient
  ) external payable;
}


// File contracts/Misc_AMOs/kyberswap_v2/periphery/IBasePositionManager.sol





interface IBasePositionManager is IRouterTokenHelper, IBasePositionManagerEvents {
  struct Position {
    // the nonce for permits
    uint96 nonce;
    // the address that is approved for spending this token
    address operator;
    // the ID of the pool with which this token is connected
    uint80 poolId;
    // the tick range of the position
    int24 tickLower;
    int24 tickUpper;
    // the liquidity of the position
    uint128 liquidity;
    // the current rToken that the position owed
    uint256 rTokenOwed;
    // fee growth per unit of liquidity as of the last update to liquidity
    uint256 feeGrowthInsideLast;
  }

  struct PoolInfo {
    address token0;
    uint24 fee;
    address token1;
  }

  /// @notice Params for the first time adding liquidity, mint new nft to sender
  /// @param token0 the token0 of the pool
  /// @param token1 the token1 of the pool
  ///   - must make sure that token0 < token1
  /// @param fee the pool's fee in fee units
  /// @param tickLower the position's lower tick
  /// @param tickUpper the position's upper tick
  ///   - must make sure tickLower < tickUpper, and both are in tick distance
  /// @param ticksPrevious the nearest tick that has been initialized and lower than or equal to
  ///   the tickLower and tickUpper, use to help insert the tickLower and tickUpper if haven't initialized
  /// @param amount0Desired the desired amount for token0
  /// @param amount1Desired the desired amount for token1
  /// @param amount0Min min amount of token 0 to add
  /// @param amount1Min min amount of token 1 to add
  /// @param recipient the owner of the position
  /// @param deadline time that the transaction will be expired
  struct MintParams {
    address token0;
    address token1;
    uint24 fee;
    int24 tickLower;
    int24 tickUpper;
    int24[2] ticksPrevious;
    uint256 amount0Desired;
    uint256 amount1Desired;
    uint256 amount0Min;
    uint256 amount1Min;
    address recipient;
    uint256 deadline;
  }

  /// @notice Params for adding liquidity to the existing position
  /// @param tokenId id of the position to increase its liquidity
  /// @param ticksPrevious the nearest tick that has been initialized and lower than or equal to
  ///   the tickLower and tickUpper, use to help insert the tickLower and tickUpper if haven't initialized
  ///   only needed if the position has been closed and the owner wants to add more liquidity
  /// @param amount0Desired the desired amount for token0
  /// @param amount1Desired the desired amount for token1
  /// @param amount0Min min amount of token 0 to add
  /// @param amount1Min min amount of token 1 to add
  /// @param deadline time that the transaction will be expired
  struct IncreaseLiquidityParams {
    uint256 tokenId;
    int24[2] ticksPrevious;
    uint256 amount0Desired;
    uint256 amount1Desired;
    uint256 amount0Min;
    uint256 amount1Min;
    uint256 deadline;
  }

  /// @notice Params for remove liquidity from the existing position
  /// @param tokenId id of the position to remove its liquidity
  /// @param amount0Min min amount of token 0 to receive
  /// @param amount1Min min amount of token 1 to receive
  /// @param deadline time that the transaction will be expired
  struct RemoveLiquidityParams {
    uint256 tokenId;
    uint128 liquidity;
    uint256 amount0Min;
    uint256 amount1Min;
    uint256 deadline;
  }

  /// @notice Burn the rTokens to get back token0 + token1 as fees
  /// @param tokenId id of the position to burn r token
  /// @param amount0Min min amount of token 0 to receive
  /// @param amount1Min min amount of token 1 to receive
  /// @param deadline time that the transaction will be expired
  struct BurnRTokenParams {
    uint256 tokenId;
    uint256 amount0Min;
    uint256 amount1Min;
    uint256 deadline;
  }

  /// @notice Creates a new pool if it does not exist, then unlocks if it has not been unlocked
  /// @param token0 the token0 of the pool
  /// @param token1 the token1 of the pool
  /// @param fee the fee for the pool
  /// @param currentSqrtP the initial price of the pool
  /// @return pool returns the pool address
  function createAndUnlockPoolIfNecessary(
    address token0,
    address token1,
    uint24 fee,
    uint160 currentSqrtP
  ) external payable returns (address pool);

  function mint(MintParams calldata params)
    external
    payable
    returns (
      uint256 tokenId,
      uint128 liquidity,
      uint256 amount0,
      uint256 amount1
    );

  function addLiquidity(IncreaseLiquidityParams calldata params)
    external
    payable
    returns (
      uint128 liquidity,
      uint256 amount0,
      uint256 amount1,
      uint256 additionalRTokenOwed
    );

  function removeLiquidity(RemoveLiquidityParams calldata params)
    external
    returns (
      uint256 amount0,
      uint256 amount1,
      uint256 additionalRTokenOwed
    );

  function burnRTokens(BurnRTokenParams calldata params)
    external
    returns (
      uint256 rTokenQty,
      uint256 amount0,
      uint256 amount1
    );

  /**
   * @dev Burn the token by its owner
   * @notice All liquidity should be removed before burning
   */
  function burn(uint256 tokenId) external payable;

  function syncFeeGrowth(uint256 tokenId) external returns (uint256 additionalRTokenOwed);

  function positions(uint256 tokenId)
    external
    view
    returns (Position memory pos, PoolInfo memory info);

  function addressToPoolId(address pool) external view returns (uint80);

  function isRToken(address token) external view returns (bool);

  function nextPoolId() external view returns (uint80);

  function nextTokenId() external view returns (uint256);

  /**
   * @dev Returns true if this contract implements the interface defined by
   * `interfaceId`. See the corresponding
   * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
   * to learn more about how these ids are created.
   *
   * This function call must use less than 30 000 gas.
   */
  function supportsInterface(bytes4 interfaceId) external view returns (bool);
}


// File contracts/Misc_AMOs/kyberswap_v2/callback/ISwapCallback.sol


/// @title Callback for IPool#swap
/// @notice Any contract that calls IPool#swap must implement this interface
interface ISwapCallback {
  /// @notice Called to `msg.sender` after swap execution of IPool#swap.
  /// @dev This function's implementation must pay tokens owed to the pool for the swap.
  /// The caller of this method must be checked to be a Pool deployed by the canonical Factory.
  /// deltaQty0 and deltaQty1 can both be 0 if no tokens were swapped.
  /// @param deltaQty0 The token0 quantity that was sent (negative) or must be received (positive) by the pool by
  /// the end of the swap. If positive, the callback must send deltaQty0 of token0 to the pool.
  /// @param deltaQty1 The token1 quantity that was sent (negative) or must be received (positive) by the pool by
  /// the end of the swap. If positive, the callback must send deltaQty1 of token1 to the pool.
  /// @param data Data passed through by the caller via the IPool#swap call
  function swapCallback(
    int256 deltaQty0,
    int256 deltaQty1,
    bytes calldata data
  ) external;
}


// File contracts/Misc_AMOs/kyberswap_v2/periphery/IRouter.sol

pragma abicoder v2;

/// @notice Functions for swapping tokens via KyberSwap v2
/// - Support swap with exact input or exact output
/// - Support swap with a price limit
/// - Support swap within a single pool and between multiple pools
interface IRouter is ISwapCallback {
  /// @dev Params for swapping exact input amount
  /// @param tokenIn the token to swap
  /// @param tokenOut the token to receive
  /// @param fee the pool's fee
  /// @param recipient address to receive tokenOut
  /// @param deadline time that the transaction will be expired
  /// @param amountIn the tokenIn amount to swap
  /// @param amountOutMinimum the minimum receive amount
  /// @param limitSqrtP the price limit, if reached, stop swapping
  struct ExactInputSingleParams {
    address tokenIn;
    address tokenOut;
    uint24 fee;
    address recipient;
    uint256 deadline;
    uint256 amountIn;
    uint256 minAmountOut;
    uint160 limitSqrtP;
  }

  /// @notice Swaps `amountIn` of one token for as much as possible of another token
  /// @param params The parameters necessary for the swap, encoded as `ExactInputSingleParams` in calldata
  /// @return amountOut The amount of the received token
  function swapExactInputSingle(ExactInputSingleParams calldata params)
    external
    payable
    returns (uint256 amountOut);

  /// @dev Params for swapping exact input using multiple pools
  /// @param path the encoded path to swap from tokenIn to tokenOut
  ///   If the swap is from token0 -> token1 -> token2, then path is encoded as [token0, fee01, token1, fee12, token2]
  /// @param recipient address to receive tokenOut
  /// @param deadline time that the transaction will be expired
  /// @param amountIn the tokenIn amount to swap
  /// @param amountOutMinimum the minimum receive amount
  struct ExactInputParams {
    bytes path;
    address recipient;
    uint256 deadline;
    uint256 amountIn;
    uint256 minAmountOut;
  }

  /// @notice Swaps `amountIn` of one token for as much as possible of another along the specified path
  /// @param params The parameters necessary for the multi-hop swap, encoded as `ExactInputParams` in calldata
  /// @return amountOut The amount of the received token
  function swapExactInput(ExactInputParams calldata params)
    external
    payable
    returns (uint256 amountOut);

  /// @dev Params for swapping exact output amount
  /// @param tokenIn the token to swap
  /// @param tokenOut the token to receive
  /// @param fee the pool's fee
  /// @param recipient address to receive tokenOut
  /// @param deadline time that the transaction will be expired
  /// @param amountOut the tokenOut amount of tokenOut
  /// @param amountInMaximum the minimum input amount
  /// @param limitSqrtP the price limit, if reached, stop swapping
  struct ExactOutputSingleParams {
    address tokenIn;
    address tokenOut;
    uint24 fee;
    address recipient;
    uint256 deadline;
    uint256 amountOut;
    uint256 maxAmountIn;
    uint160 limitSqrtP;
  }

  /// @notice Swaps as little as possible of one token for `amountOut` of another token
  /// @param params The parameters necessary for the swap, encoded as `ExactOutputSingleParams` in calldata
  /// @return amountIn The amount of the input token
  function swapExactOutputSingle(ExactOutputSingleParams calldata params)
    external
    payable
    returns (uint256 amountIn);

  /// @dev Params for swapping exact output using multiple pools
  /// @param path the encoded path to swap from tokenIn to tokenOut
  ///   If the swap is from token0 -> token1 -> token2, then path is encoded as [token2, fee12, token1, fee01, token0]
  /// @param recipient address to receive tokenOut
  /// @param deadline time that the transaction will be expired
  /// @param amountOut the tokenOut amount of tokenOut
  /// @param amountInMaximum the minimum input amount
  struct ExactOutputParams {
    bytes path;
    address recipient;
    uint256 deadline;
    uint256 amountOut;
    uint256 maxAmountIn;
  }

  /// @notice Swaps as little as possible of one token for `amountOut` of another along the specified path (reversed)
  /// @param params The parameters necessary for the multi-hop swap, encoded as `ExactOutputParams` in calldata
  /// @return amountIn The amount of the input token
  function swapExactOutput(ExactOutputParams calldata params)
    external
    payable
    returns (uint256 amountIn);
}


// File contracts/Misc_AMOs/kyberswap_v2/ITickFeesReader.sol


interface ITickFeesReader {
  function getAllTicks ( address pool ) external view returns ( int24[] memory allTicks );
  function getNearestInitializedTicks ( address pool, int24 tick ) external view returns ( int24 previous, int24 next );
  function getTicksInRange ( address pool, int24 startTick, uint32 length ) external view returns ( int24[] memory allTicks );
  function getTotalFeesOwedToPosition ( address posManager, address pool, uint256 tokenId ) external view returns ( uint256 token0Owed, uint256 token1Owed );
  function getTotalRTokensOwedToPosition ( address posManager, address pool, uint256 tokenId ) external view returns ( uint256 rTokenOwed );
}


// File contracts/Misc_AMOs/kyberswap_v2/TickMath.sol


/// @title Math library for computing sqrt prices from ticks and vice versa
/// @notice Computes sqrt price for ticks of size 1.0001, i.e. sqrt(1.0001^tick) as fixed point Q64.96 numbers. Supports
/// prices between 2**-128 and 2**128
library TickMath {
  /// @dev The minimum tick that may be passed to #getSqrtRatioAtTick computed from log base 1.0001 of 2**-128
  int24 internal constant MIN_TICK = -887272;
  /// @dev The maximum tick that may be passed to #getSqrtRatioAtTick computed from log base 1.0001 of 2**128
  int24 internal constant MAX_TICK = -MIN_TICK;

  /// @dev The minimum value that can be returned from #getSqrtRatioAtTick. Equivalent to getSqrtRatioAtTick(MIN_TICK)
  uint160 internal constant MIN_SQRT_RATIO = 4295128739;
  /// @dev The maximum value that can be returned from #getSqrtRatioAtTick. Equivalent to getSqrtRatioAtTick(MAX_TICK)
  uint160 internal constant MAX_SQRT_RATIO = 1461446703485210103287273052203988822378723970342;

  /// @notice Calculates sqrt(1.0001^tick) * 2^96
  /// @dev Throws if |tick| > max tick
  /// @param tick The input tick for the above formula
  /// @return sqrtP A Fixed point Q64.96 number representing the sqrt of the ratio of the two assets (token1/token0)
  /// at the given tick
  function getSqrtRatioAtTick(int24 tick) internal pure returns (uint160 sqrtP) {
    unchecked {
      uint256 absTick = uint256(tick < 0 ? -int256(tick) : int256(tick));
      require(absTick <= uint256(int256(MAX_TICK)), 'T');

      // do bitwise comparison, if i-th bit is turned on,
      // multiply ratio by hardcoded values of sqrt(1.0001^-(2^i)) * 2^128
      // where 0 <= i <= 19
      uint256 ratio = (absTick & 0x1 != 0)
        ? 0xfffcb933bd6fad37aa2d162d1a594001
        : 0x100000000000000000000000000000000;
      if (absTick & 0x2 != 0) ratio = (ratio * 0xfff97272373d413259a46990580e213a) >> 128;
      if (absTick & 0x4 != 0) ratio = (ratio * 0xfff2e50f5f656932ef12357cf3c7fdcc) >> 128;
      if (absTick & 0x8 != 0) ratio = (ratio * 0xffe5caca7e10e4e61c3624eaa0941cd0) >> 128;
      if (absTick & 0x10 != 0) ratio = (ratio * 0xffcb9843d60f6159c9db58835c926644) >> 128;
      if (absTick & 0x20 != 0) ratio = (ratio * 0xff973b41fa98c081472e6896dfb254c0) >> 128;
      if (absTick & 0x40 != 0) ratio = (ratio * 0xff2ea16466c96a3843ec78b326b52861) >> 128;
      if (absTick & 0x80 != 0) ratio = (ratio * 0xfe5dee046a99a2a811c461f1969c3053) >> 128;
      if (absTick & 0x100 != 0) ratio = (ratio * 0xfcbe86c7900a88aedcffc83b479aa3a4) >> 128;
      if (absTick & 0x200 != 0) ratio = (ratio * 0xf987a7253ac413176f2b074cf7815e54) >> 128;
      if (absTick & 0x400 != 0) ratio = (ratio * 0xf3392b0822b70005940c7a398e4b70f3) >> 128;
      if (absTick & 0x800 != 0) ratio = (ratio * 0xe7159475a2c29b7443b29c7fa6e889d9) >> 128;
      if (absTick & 0x1000 != 0) ratio = (ratio * 0xd097f3bdfd2022b8845ad8f792aa5825) >> 128;
      if (absTick & 0x2000 != 0) ratio = (ratio * 0xa9f746462d870fdf8a65dc1f90e061e5) >> 128;
      if (absTick & 0x4000 != 0) ratio = (ratio * 0x70d869a156d2a1b890bb3df62baf32f7) >> 128;
      if (absTick & 0x8000 != 0) ratio = (ratio * 0x31be135f97d08fd981231505542fcfa6) >> 128;
      if (absTick & 0x10000 != 0) ratio = (ratio * 0x9aa508b5b7a84e1c677de54f3e99bc9) >> 128;
      if (absTick & 0x20000 != 0) ratio = (ratio * 0x5d6af8dedb81196699c329225ee604) >> 128;
      if (absTick & 0x40000 != 0) ratio = (ratio * 0x2216e584f5fa1ea926041bedfe98) >> 128;
      if (absTick & 0x80000 != 0) ratio = (ratio * 0x48a170391f7dc42444e8fa2) >> 128;

      // take reciprocal for positive tick values
      if (tick > 0) ratio = type(uint256).max / ratio;

      // this divides by 1<<32 rounding up to go from a Q128.128 to a Q128.96.
      // we then downcast because we know the result always fits within 160 bits due to our tick input constraint
      // we round up in the division so getTickAtSqrtRatio of the output price is always consistent
      sqrtP = uint160((ratio >> 32) + (ratio % (1 << 32) == 0 ? 0 : 1));
    }
  }

  /// @notice Calculates the greatest tick value such that getRatioAtTick(tick) <= ratio
  /// @dev Throws in case sqrtP < MIN_SQRT_RATIO, as MIN_SQRT_RATIO is the lowest value getRatioAtTick may
  /// ever return.
  /// @param sqrtP The sqrt ratio for which to compute the tick as a Q64.96
  /// @return tick The greatest tick for which the ratio is less than or equal to the input ratio
  function getTickAtSqrtRatio(uint160 sqrtP) internal pure returns (int24 tick) {
    // second inequality must be < because the price can never reach the price at the max tick
    require(sqrtP >= MIN_SQRT_RATIO && sqrtP < MAX_SQRT_RATIO, 'R');
    uint256 ratio = uint256(sqrtP) << 32;

    uint256 r = ratio;
    uint256 msb = 0;

    unchecked {
      assembly {
        let f := shl(7, gt(r, 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF))
        msb := or(msb, f)
        r := shr(f, r)
      }
      assembly {
        let f := shl(6, gt(r, 0xFFFFFFFFFFFFFFFF))
        msb := or(msb, f)
        r := shr(f, r)
      }
      assembly {
        let f := shl(5, gt(r, 0xFFFFFFFF))
        msb := or(msb, f)
        r := shr(f, r)
      }
      assembly {
        let f := shl(4, gt(r, 0xFFFF))
        msb := or(msb, f)
        r := shr(f, r)
      }
      assembly {
        let f := shl(3, gt(r, 0xFF))
        msb := or(msb, f)
        r := shr(f, r)
      }
      assembly {
        let f := shl(2, gt(r, 0xF))
        msb := or(msb, f)
        r := shr(f, r)
      }
      assembly {
        let f := shl(1, gt(r, 0x3))
        msb := or(msb, f)
        r := shr(f, r)
      }
      assembly {
        let f := gt(r, 0x1)
        msb := or(msb, f)
      }

      if (msb >= 128) r = ratio >> (msb - 127);
      else r = ratio << (127 - msb);

      int256 log_2 = (int256(msb) - 128) << 64;

      assembly {
        r := shr(127, mul(r, r))
        let f := shr(128, r)
        log_2 := or(log_2, shl(63, f))
        r := shr(f, r)
      }
      assembly {
        r := shr(127, mul(r, r))
        let f := shr(128, r)
        log_2 := or(log_2, shl(62, f))
        r := shr(f, r)
      }
      assembly {
        r := shr(127, mul(r, r))
        let f := shr(128, r)
        log_2 := or(log_2, shl(61, f))
        r := shr(f, r)
      }
      assembly {
        r := shr(127, mul(r, r))
        let f := shr(128, r)
        log_2 := or(log_2, shl(60, f))
        r := shr(f, r)
      }
      assembly {
        r := shr(127, mul(r, r))
        let f := shr(128, r)
        log_2 := or(log_2, shl(59, f))
        r := shr(f, r)
      }
      assembly {
        r := shr(127, mul(r, r))
        let f := shr(128, r)
        log_2 := or(log_2, shl(58, f))
        r := shr(f, r)
      }
      assembly {
        r := shr(127, mul(r, r))
        let f := shr(128, r)
        log_2 := or(log_2, shl(57, f))
        r := shr(f, r)
      }
      assembly {
        r := shr(127, mul(r, r))
        let f := shr(128, r)
        log_2 := or(log_2, shl(56, f))
        r := shr(f, r)
      }
      assembly {
        r := shr(127, mul(r, r))
        let f := shr(128, r)
        log_2 := or(log_2, shl(55, f))
        r := shr(f, r)
      }
      assembly {
        r := shr(127, mul(r, r))
        let f := shr(128, r)
        log_2 := or(log_2, shl(54, f))
        r := shr(f, r)
      }
      assembly {
        r := shr(127, mul(r, r))
        let f := shr(128, r)
        log_2 := or(log_2, shl(53, f))
        r := shr(f, r)
      }
      assembly {
        r := shr(127, mul(r, r))
        let f := shr(128, r)
        log_2 := or(log_2, shl(52, f))
        r := shr(f, r)
      }
      assembly {
        r := shr(127, mul(r, r))
        let f := shr(128, r)
        log_2 := or(log_2, shl(51, f))
        r := shr(f, r)
      }
      assembly {
        r := shr(127, mul(r, r))
        let f := shr(128, r)
        log_2 := or(log_2, shl(50, f))
      }

      int256 log_sqrt10001 = log_2 * 255738958999603826347141; // 128.128 number

      int24 tickLow = int24((log_sqrt10001 - 3402992956809132418596140100660247210) >> 128);
      int24 tickHi = int24((log_sqrt10001 + 291339464771989622907027621153398088495) >> 128);

      tick = tickLow == tickHi ? tickLow : getSqrtRatioAtTick(tickHi) <= sqrtP ? tickHi : tickLow;
    }
  }

  function getMaxNumberTicks(int24 _tickDistance) internal pure returns (uint24 numTicks) {
    return uint24(TickMath.MAX_TICK / _tickDistance) * 2;
  }
}


// File contracts/Oracle/AggregatorV3Interface.sol


interface AggregatorV3Interface {

  function decimals() external view returns (uint8);
  function description() external view returns (string memory);
  function version() external view returns (uint256);

  // getRoundData and latestRoundData should both raise "No data present"
  // if they do not have data to report, instead of returning unset values
  // which could be misinterpreted as actual reported values.
  function getRoundData(uint80 _roundId)
    external
    view
    returns (
      uint80 roundId,
      int256 answer,
      uint256 startedAt,
      uint256 updatedAt,
      uint80 answeredInRound
    );
  function latestRoundData()
    external
    view
    returns (
      uint80 roundId,
      int256 answer,
      uint256 startedAt,
      uint256 updatedAt,
      uint80 answeredInRound
    );

}


// File contracts/Oracle/IPricePerShareOptions.sol


interface IPricePerShareOptions {
    // Compound-style [Comp, Cream, Rari, Scream]
    // Multiplied by 1e18
    function exchangeRateStored() external view returns (uint256);

    // Curve-style [Curve, Convex, NOT StakeDAO]
    // In 1e18
    function get_virtual_price() external view returns (uint256);

    // SaddleD4Pool (SwapFlashLoan)
    function getVirtualPrice() external view returns (uint256);

    // StakeDAO
    function getPricePerFullShare() external view returns (uint256);

    // Yearn Vault
    function pricePerShare() external view returns (uint256);
}


// File contracts/Staking/Owned.sol


// https://docs.synthetix.io/contracts/Owned
contract Owned {
    address public owner;
    address public nominatedOwner;

    constructor (address _owner) public {
        require(_owner != address(0), "Owner address cannot be 0");
        owner = _owner;
        emit OwnerChanged(address(0), _owner);
    }

    function nominateNewOwner(address _owner) external onlyOwner {
        nominatedOwner = _owner;
        emit OwnerNominated(_owner);
    }

    function acceptOwnership() external {
        require(msg.sender == nominatedOwner, "You must be nominated before you can accept ownership");
        emit OwnerChanged(owner, nominatedOwner);
        owner = nominatedOwner;
        nominatedOwner = address(0);
    }

    modifier onlyOwner {
        require(msg.sender == owner, "Only the contract owner may perform this action");
        _;
    }

    event OwnerNominated(address newOwner);
    event OwnerChanged(address oldOwner, address newOwner);
}


// File contracts/Oracle/ComboOracle.sol


// ====================================================================
// |     ______                   _______                             |
// |    / _____________ __  __   / ____(_____  ____ _____  ________   |
// |   / /_  / ___/ __ `| |/_/  / /_  / / __ \/ __ `/ __ \/ ___/ _ \  |
// |  / __/ / /  / /_/ _>  <   / __/ / / / / / /_/ / / / / /__/  __/  |
// | /_/   /_/   \__,_/_/|_|  /_/   /_/_/ /_/\__,_/_/ /_/\___/\___/   |
// |                                                                  |
// ====================================================================
// =========================== ComboOracle ============================
// ====================================================================
// Aggregates prices for various tokens
// Also has improvements from https://github.com/AlphaFinanceLab/alpha-homora-v2-contract/blob/master/contracts/oracle/ChainlinkAdapterOracle.sol

// Frax Finance: https://github.com/FraxFinance

// Primary Author(s)
// Travis Moore: https://github.com/FortisFortuna

// Reviewer(s) / Contributor(s)
// Jason Huan: https://github.com/jasonhuan
// Sam Kazemian: https://github.com/samkazemian




contract ComboOracle is Owned {

    /* ========== STATE VARIABLES ========== */
    
    address timelock_address;
    address address_to_consult;
    AggregatorV3Interface private priceFeedETHUSD;
    ERC20 private WETH;
    string public native_token_symbol;

    uint256 public PRECISE_PRICE_PRECISION = 1e18;
    uint256 public PRICE_PRECISION = 1e6;
    uint256 public PRICE_MISSING_MULTIPLIER = 1e12;

    address[] public all_token_addresses;
    mapping(address => TokenInfo) public token_info; // token address => info
    mapping(address => bool) public has_info; // token address => has info

    // Price mappings
    uint public maxDelayTime = 90000; // 25 hrs. Mapping for max delay time

    /* ========== STRUCTS ========== */

    struct TokenInfoConstructorArgs {
        address token_address;
        address agg_addr_for_underlying; 
        uint256 agg_other_side; // 0: USD, 1: ETH
        address underlying_tkn_address; // Will be address(0) for simple tokens. Otherwise, the aUSDC, yvUSDC address, etc
        address pps_override_address;
        bytes4 pps_call_selector; // eg bytes4(keccak256("pricePerShare()"));
        uint256 pps_decimals;
    }

    struct TokenInfo {
        address token_address;
        string symbol;
        address agg_addr_for_underlying; 
        uint256 agg_other_side; // 0: USD, 1: ETH
        uint256 agg_decimals;
        address underlying_tkn_address; // Will be address(0) for simple tokens. Otherwise, the aUSDC, yvUSDC address, etc
        address pps_override_address;
        bytes4 pps_call_selector; // eg bytes4(keccak256("pricePerShare()"));
        uint256 pps_decimals;
        int256 ctkn_undrly_missing_decs;
    }

    /* ========== CONSTRUCTOR ========== */

    constructor (
        address _owner_address,
        address _eth_usd_chainlink_address,
        address _weth_address,
        string memory _native_token_symbol,
        string memory _weth_token_symbol
    ) Owned(_owner_address) {

        // Instantiate the instances
        priceFeedETHUSD = AggregatorV3Interface(_eth_usd_chainlink_address);
        WETH = ERC20(_weth_address);

        // Handle native ETH
        all_token_addresses.push(address(0));
        native_token_symbol = _native_token_symbol;
        token_info[address(0)] = TokenInfo(
            address(0),
            _native_token_symbol,
            address(_eth_usd_chainlink_address),
            0,
            8,
            address(0),
            address(0),
            bytes4(0),
            0,
            0
        );
        has_info[address(0)] = true;

        // Handle WETH/USD
        all_token_addresses.push(_weth_address);
        token_info[_weth_address] = TokenInfo(
            _weth_address,
            _weth_token_symbol,
            address(_eth_usd_chainlink_address),
            0,
            8,
            address(0),
            address(0),
            bytes4(0),
            0,
            0
        );
        has_info[_weth_address] = true;
    }

    /* ========== MODIFIERS ========== */

    modifier onlyByOwnGov() {
        require(msg.sender == owner || msg.sender == timelock_address, "You are not an owner or the governance timelock");
        _;
    }

    /* ========== VIEWS ========== */

    function allTokenAddresses() public view returns (address[] memory) {
        return all_token_addresses;
    }

    function allTokenInfos() public view returns (TokenInfo[] memory) {
        TokenInfo[] memory return_data = new TokenInfo[](all_token_addresses.length);
        for (uint i = 0; i < all_token_addresses.length; i++){ 
            return_data[i] = token_info[all_token_addresses[i]];
        }
        return return_data;
    }

    // E6
    function getETHPrice() public view returns (uint256) {
        (uint80 roundID, int price, , uint256 updatedAt, uint80 answeredInRound) = priceFeedETHUSD.latestRoundData();
        require(price >= 0 && (updatedAt >= block.timestamp - maxDelayTime) && answeredInRound >= roundID, "Invalid chainlink price");

        return (uint256(price) * (PRICE_PRECISION)) / (1e8); // ETH/USD is 8 decimals on Chainlink
    }

    // E18
    function getETHPricePrecise() public view returns (uint256) {
        (uint80 roundID, int price, , uint256 updatedAt, uint80 answeredInRound) = priceFeedETHUSD.latestRoundData();
        require(price >= 0 && (updatedAt >= block.timestamp - maxDelayTime) && answeredInRound >= roundID, "Invalid chainlink price");

        return (uint256(price) * (PRECISE_PRICE_PRECISION)) / (1e8); // ETH/USD is 8 decimals on Chainlink
    }

    function getTokenPrice(address token_address) public view returns (uint256 precise_price, uint256 short_price, uint256 eth_price) {
        // Get the token info
        TokenInfo memory thisTokenInfo = token_info[token_address];

        // Get the price for the underlying token
        (uint80 roundID, int price, , uint256 updatedAt, uint80 answeredInRound) = AggregatorV3Interface(thisTokenInfo.agg_addr_for_underlying).latestRoundData();
        require(price >= 0 && (updatedAt >= block.timestamp - maxDelayTime) && answeredInRound >= roundID, "Invalid chainlink price");
        
        uint256 agg_price = uint256(price);

        // Convert to USD, if not already
        if (thisTokenInfo.agg_other_side == 1) agg_price = (agg_price * getETHPricePrecise()) / PRECISE_PRICE_PRECISION;

        // cToken balance * pps = amt of underlying in native decimals
        uint256 price_per_share = 1;
        if (thisTokenInfo.underlying_tkn_address != address(0)){
            address pps_address_to_use = thisTokenInfo.token_address;
            if (thisTokenInfo.pps_override_address != address(0)) pps_address_to_use = thisTokenInfo.pps_override_address;
            (bool success, bytes memory data) = (pps_address_to_use).staticcall(abi.encodeWithSelector(thisTokenInfo.pps_call_selector));
            require(success, 'Oracle Failed');

            price_per_share = abi.decode(data, (uint256));
        }

        // E18
        uint256 pps_multiplier = (uint256(10) ** (thisTokenInfo.pps_decimals));

        // Handle difference in decimals()
        if (thisTokenInfo.ctkn_undrly_missing_decs < 0){
            uint256 ctkn_undr_miss_dec_mult = (10 ** uint256(-1 * thisTokenInfo.ctkn_undrly_missing_decs));
            precise_price = (agg_price * PRECISE_PRICE_PRECISION * price_per_share) / (ctkn_undr_miss_dec_mult * pps_multiplier * (uint256(10) ** (thisTokenInfo.agg_decimals)));
        }
        else {
            uint256 ctkn_undr_miss_dec_mult = (10 ** uint256(thisTokenInfo.ctkn_undrly_missing_decs));
            precise_price = (agg_price * PRECISE_PRICE_PRECISION * price_per_share * ctkn_undr_miss_dec_mult) / (pps_multiplier * (uint256(10) ** (thisTokenInfo.agg_decimals)));
        }
        
        // E6
        short_price = precise_price / PRICE_MISSING_MULTIPLIER;

        // ETH Price
        eth_price = (precise_price * PRECISE_PRICE_PRECISION) / getETHPricePrecise();
    }

    // Return token price in ETH, multiplied by 2**112
    function getETHPx112(address token_address) external view returns (uint256) {
        if (token_address == address(WETH) || token_address == 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE) return uint(2 ** 112);
        require(maxDelayTime != 0, 'Max delay time not set');

        // Get the ETH Price PRECISE_PRICE_PRECISION
        ( , , uint256 eth_price) = getTokenPrice(token_address);
        
        // Get the decimals
        uint decimals = uint(ERC20(token_address).decimals());

        // Scale to 2*112
        // Also divide by the token decimals (needed for the math. Nothing to do with missing decimals or anything)
        return (eth_price * (2 ** 112)) / (10 ** decimals);
    }

    /* ========== RESTRICTED GOVERNANCE FUNCTIONS ========== */

    function setTimelock(address _timelock_address) external onlyByOwnGov {
        timelock_address = _timelock_address;
    }

    function setMaxDelayTime(uint _maxDelayTime) external onlyByOwnGov {
        maxDelayTime = _maxDelayTime;
    }

    function batchSetOracleInfoDirect(TokenInfoConstructorArgs[] memory _initial_token_infos) external onlyByOwnGov {
        // Batch set token info
        for (uint256 i = 0; i < _initial_token_infos.length; i++){ 
            TokenInfoConstructorArgs memory this_token_info = _initial_token_infos[i];
            _setTokenInfo(
                this_token_info.token_address, 
                this_token_info.agg_addr_for_underlying, 
                this_token_info.agg_other_side, 
                this_token_info.underlying_tkn_address, 
                this_token_info.pps_override_address,
                this_token_info.pps_call_selector, 
                this_token_info.pps_decimals
            );
        }
    }

    // Sets oracle info for a token 
    // Chainlink Addresses
    // https://docs.chain.link/docs/ethereum-addresses/

    // exchangeRateStored: 0x182df0f5
    // getPricePerFullShare: 0x77c7b8fc
    // get_virtual_price: 0xbb7b8b80
    // getVirtualPrice: 0xe25aa5fa
    // pricePerShare: 0x99530b06
    // lp_price: 0x54f0f7d5

    // Function signature encoder
    //     web3_data.eth.abi.encodeFunctionSignature({
    //     name: 'getVirtualPrice',
    //     type: 'function',
    //     inputs: []
    // })
    //     web3_data.eth.abi.encodeFunctionSignature({
    //     name: 'myMethod',
    //     type: 'function',
    //     inputs: [{
    //         type: 'uint256',
    //         name: 'myNumber'
    //     }]
    // })

    // To burn something, for example, type this on app.frax.finance's JS console
    // https://web3js.readthedocs.io/en/v1.2.11/web3-eth-abi.html#encodefunctioncall
    // web3_data.eth.abi.encodeFunctionCall({
    //     name: 'burn',
    //     type: 'function',
    //     inputs: [{
    //         type: 'uint256',
    //         name: 'myNumber'
    //     }]
    // }, ['100940878321208298244715']);

    function _setTokenInfo(
        address token_address, 
        address agg_addr_for_underlying, 
        uint256 agg_other_side, // 0: USD, 1: ETH
        address underlying_tkn_address,
        address pps_override_address,
        bytes4 pps_call_selector,
        uint256 pps_decimals
    ) internal {
        // require(token_address != address(0), "Cannot add zero address");

        // See if there are any missing decimals between a cToken and the underlying
        int256 ctkn_undrly_missing_decs = 0;
        if (underlying_tkn_address != address(0)){
            uint256 cToken_decs = ERC20(token_address).decimals();
            uint256 underlying_decs = ERC20(underlying_tkn_address).decimals();

            ctkn_undrly_missing_decs = int256(cToken_decs) - int256(underlying_decs);
        }

        // Add the token address to the array if it doesn't already exist
        bool token_exists = false;
        for (uint i = 0; i < all_token_addresses.length; i++){ 
            if (all_token_addresses[i] == token_address) {
                token_exists = true;
                break;
            }
        }
        if (!token_exists) all_token_addresses.push(token_address);

        uint256 agg_decs = uint256(AggregatorV3Interface(agg_addr_for_underlying).decimals());

        string memory name_to_use;
        if (token_address == address(0)) {
            name_to_use = native_token_symbol;
        }
        else {
            name_to_use = ERC20(token_address).name();
        }

        // Add the token to the mapping
        token_info[token_address] = TokenInfo(
            token_address,
            ERC20(token_address).name(),
            agg_addr_for_underlying,
            agg_other_side,
            agg_decs,
            underlying_tkn_address,
            pps_override_address,
            pps_call_selector,
            pps_decimals,
            ctkn_undrly_missing_decs
        );
        has_info[token_address] = true;
    }

    function setTokenInfo(
        address token_address, 
        address agg_addr_for_underlying, 
        uint256 agg_other_side,
        address underlying_tkn_address,
        address pps_override_address,
        bytes4 pps_call_selector,
        uint256 pps_decimals
    ) public onlyByOwnGov {
        _setTokenInfo(token_address, agg_addr_for_underlying, agg_other_side, underlying_tkn_address, pps_override_address, pps_call_selector, pps_decimals);
    }

}


// File contracts/Uniswap_V3/libraries/FixedPoint96.sol


/// @title FixedPoint96
/// @notice A library for handling binary fixed point numbers, see https://en.wikipedia.org/wiki/Q_(number_format)
/// @dev Used in SqrtPriceMath.sol
library FixedPoint96 {
    uint8 internal constant RESOLUTION = 96;
    uint256 internal constant Q96 = 0x1000000000000000000000000;
}


// File contracts/Uniswap_V3/libraries/FullMath.sol


/// @title Contains 512-bit math functions
/// @notice Facilitates multiplication and division that can have overflow of an intermediate value without any loss of precision
/// @dev Handles "phantom overflow" i.e., allows multiplication and division where an intermediate value overflows 256 bits
library FullMath {
    /// @notice Calculates floor(a×b÷denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
    /// @param a The multiplicand
    /// @param b The multiplier
    /// @param denominator The divisor
    /// @return result The 256-bit result
    /// @dev Credit to Remco Bloemen under MIT license https://xn--2-umb.com/21/muldiv
    function mulDiv(
        uint256 a,
        uint256 b,
        uint256 denominator
    ) internal pure returns (uint256 result) {
        // 512-bit multiply [prod1 prod0] = a * b
        // Compute the product mod 2**256 and mod 2**256 - 1
        // then use the Chinese Remainder Theorem to reconstruct
        // the 512 bit result. The result is stored in two 256
        // variables such that product = prod1 * 2**256 + prod0
        uint256 prod0; // Least significant 256 bits of the product
        uint256 prod1; // Most significant 256 bits of the product
        assembly {
            let mm := mulmod(a, b, not(0))
            prod0 := mul(a, b)
            prod1 := sub(sub(mm, prod0), lt(mm, prod0))
        }

        // Handle non-overflow cases, 256 by 256 division
        if (prod1 == 0) {
            require(denominator > 0);
            assembly {
                result := div(prod0, denominator)
            }
            return result;
        }

        // Make sure the result is less than 2**256.
        // Also prevents denominator == 0
        require(denominator > prod1);

        ///////////////////////////////////////////////
        // 512 by 256 division.
        ///////////////////////////////////////////////

        // Make division exact by subtracting the remainder from [prod1 prod0]
        // Compute remainder using mulmod
        uint256 remainder;
        assembly {
            remainder := mulmod(a, b, denominator)
        }
        // Subtract 256 bit number from 512 bit number
        assembly {
            prod1 := sub(prod1, gt(remainder, prod0))
            prod0 := sub(prod0, remainder)
        }

        // Factor powers of two out of denominator
        // Compute largest power of two divisor of denominator.
        // Always >= 1.
        uint256 twos = (type(uint256).max - denominator + 1) & denominator;
        // Divide denominator by power of two
        assembly {
            denominator := div(denominator, twos)
        }

        // Divide [prod1 prod0] by the factors of two
        assembly {
            prod0 := div(prod0, twos)
        }
        // Shift in bits from prod1 into prod0. For this we need
        // to flip `twos` such that it is 2**256 / twos.
        // If twos is zero, then it becomes one
        assembly {
            twos := add(div(sub(0, twos), twos), 1)
        }
        prod0 |= prod1 * twos;

        // Invert denominator mod 2**256
        // Now that denominator is an odd number, it has an inverse
        // modulo 2**256 such that denominator * inv = 1 mod 2**256.
        // Compute the inverse by starting with a seed that is correct
        // correct for four bits. That is, denominator * inv = 1 mod 2**4
        uint256 inv = (3 * denominator) ^ 2;
        // Now use Newton-Raphson iteration to improve the precision.
        // Thanks to Hensel's lifting lemma, this also works in modular
        // arithmetic, doubling the correct bits in each step.
        inv *= 2 - denominator * inv; // inverse mod 2**8
        inv *= 2 - denominator * inv; // inverse mod 2**16
        inv *= 2 - denominator * inv; // inverse mod 2**32
        inv *= 2 - denominator * inv; // inverse mod 2**64
        inv *= 2 - denominator * inv; // inverse mod 2**128
        inv *= 2 - denominator * inv; // inverse mod 2**256

        // Because the division is now exact we can divide by multiplying
        // with the modular inverse of denominator. This will give us the
        // correct result modulo 2**256. Since the precoditions guarantee
        // that the outcome is less than 2**256, this is the final result.
        // We don't need to compute the high bits of the result and prod1
        // is no longer required.
        result = prod0 * inv;
        return result;
    }

    /// @notice Calculates ceil(a×b÷denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
    /// @param a The multiplicand
    /// @param b The multiplier
    /// @param denominator The divisor
    /// @return result The 256-bit result
    function mulDivRoundingUp(
        uint256 a,
        uint256 b,
        uint256 denominator
    ) internal pure returns (uint256 result) {
        result = mulDiv(a, b, denominator);
        if (mulmod(a, b, denominator) > 0) {
            require(result < type(uint256).max);
            result++;
        }
    }
}


// File contracts/Uniswap_V3/libraries/LiquidityAmounts.sol



/// @title Liquidity amount functions
/// @notice Provides functions for computing liquidity amounts from token amounts and prices
library LiquidityAmounts {
    /// @notice Downcasts uint256 to uint128
    /// @param x The uint258 to be downcasted
    /// @return y The passed value, downcasted to uint128
    function toUint128(uint256 x) private pure returns (uint128 y) {
        require((y = uint128(x)) == x);
    }

    /// @notice Computes the amount of liquidity received for a given amount of token0 and price range
    /// @dev Calculates amount0 * (sqrt(upper) * sqrt(lower)) / (sqrt(upper) - sqrt(lower))
    /// @param sqrtRatioAX96 A sqrt price representing the first tick boundary
    /// @param sqrtRatioBX96 A sqrt price representing the second tick boundary
    /// @param amount0 The amount0 being sent in
    /// @return liquidity The amount of returned liquidity
    function getLiquidityForAmount0(
        uint160 sqrtRatioAX96,
        uint160 sqrtRatioBX96,
        uint256 amount0
    ) internal pure returns (uint128 liquidity) {
        if (sqrtRatioAX96 > sqrtRatioBX96) (sqrtRatioAX96, sqrtRatioBX96) = (sqrtRatioBX96, sqrtRatioAX96);
        uint256 intermediate = FullMath.mulDiv(sqrtRatioAX96, sqrtRatioBX96, FixedPoint96.Q96);
        return toUint128(FullMath.mulDiv(amount0, intermediate, sqrtRatioBX96 - sqrtRatioAX96));
    }

    /// @notice Computes the amount of liquidity received for a given amount of token1 and price range
    /// @dev Calculates amount1 / (sqrt(upper) - sqrt(lower)).
    /// @param sqrtRatioAX96 A sqrt price representing the first tick boundary
    /// @param sqrtRatioBX96 A sqrt price representing the second tick boundary
    /// @param amount1 The amount1 being sent in
    /// @return liquidity The amount of returned liquidity
    function getLiquidityForAmount1(
        uint160 sqrtRatioAX96,
        uint160 sqrtRatioBX96,
        uint256 amount1
    ) internal pure returns (uint128 liquidity) {
        if (sqrtRatioAX96 > sqrtRatioBX96) (sqrtRatioAX96, sqrtRatioBX96) = (sqrtRatioBX96, sqrtRatioAX96);
        return toUint128(FullMath.mulDiv(amount1, FixedPoint96.Q96, sqrtRatioBX96 - sqrtRatioAX96));
    }

    /// @notice Computes the maximum amount of liquidity received for a given amount of token0, token1, the current
    /// pool prices and the prices at the tick boundaries
    /// @param sqrtRatioX96 A sqrt price representing the current pool prices
    /// @param sqrtRatioAX96 A sqrt price representing the first tick boundary
    /// @param sqrtRatioBX96 A sqrt price representing the second tick boundary
    /// @param amount0 The amount of token0 being sent in
    /// @param amount1 The amount of token1 being sent in
    /// @return liquidity The maximum amount of liquidity received
    function getLiquidityForAmounts(
        uint160 sqrtRatioX96,
        uint160 sqrtRatioAX96,
        uint160 sqrtRatioBX96,
        uint256 amount0,
        uint256 amount1
    ) internal pure returns (uint128 liquidity) {
        if (sqrtRatioAX96 > sqrtRatioBX96) (sqrtRatioAX96, sqrtRatioBX96) = (sqrtRatioBX96, sqrtRatioAX96);

        if (sqrtRatioX96 <= sqrtRatioAX96) {
            liquidity = getLiquidityForAmount0(sqrtRatioAX96, sqrtRatioBX96, amount0);
        } else if (sqrtRatioX96 < sqrtRatioBX96) {
            uint128 liquidity0 = getLiquidityForAmount0(sqrtRatioX96, sqrtRatioBX96, amount0);
            uint128 liquidity1 = getLiquidityForAmount1(sqrtRatioAX96, sqrtRatioX96, amount1);

            liquidity = liquidity0 < liquidity1 ? liquidity0 : liquidity1;
        } else {
            liquidity = getLiquidityForAmount1(sqrtRatioAX96, sqrtRatioBX96, amount1);
        }
    }

    /// @notice Computes the amount of token0 for a given amount of liquidity and a price range
    /// @param sqrtRatioAX96 A sqrt price representing the first tick boundary
    /// @param sqrtRatioBX96 A sqrt price representing the second tick boundary
    /// @param liquidity The liquidity being valued
    /// @return amount0 The amount of token0
    function getAmount0ForLiquidity(
        uint160 sqrtRatioAX96,
        uint160 sqrtRatioBX96,
        uint128 liquidity
    ) internal pure returns (uint256 amount0) {
        if (sqrtRatioAX96 > sqrtRatioBX96) (sqrtRatioAX96, sqrtRatioBX96) = (sqrtRatioBX96, sqrtRatioAX96);

        return
            FullMath.mulDiv(
                uint256(liquidity) << FixedPoint96.RESOLUTION,
                sqrtRatioBX96 - sqrtRatioAX96,
                sqrtRatioBX96
            ) / sqrtRatioAX96;
    }

    /// @notice Computes the amount of token1 for a given amount of liquidity and a price range
    /// @param sqrtRatioAX96 A sqrt price representing the first tick boundary
    /// @param sqrtRatioBX96 A sqrt price representing the second tick boundary
    /// @param liquidity The liquidity being valued
    /// @return amount1 The amount of token1
    function getAmount1ForLiquidity(
        uint160 sqrtRatioAX96,
        uint160 sqrtRatioBX96,
        uint128 liquidity
    ) internal pure returns (uint256 amount1) {
        if (sqrtRatioAX96 > sqrtRatioBX96) (sqrtRatioAX96, sqrtRatioBX96) = (sqrtRatioBX96, sqrtRatioAX96);

        return FullMath.mulDiv(liquidity, sqrtRatioBX96 - sqrtRatioAX96, FixedPoint96.Q96);
    }

    /// @notice Computes the token0 and token1 value for a given amount of liquidity, the current
    /// pool prices and the prices at the tick boundaries
    /// @param sqrtRatioX96 A sqrt price representing the current pool prices
    /// @param sqrtRatioAX96 A sqrt price representing the first tick boundary
    /// @param sqrtRatioBX96 A sqrt price representing the second tick boundary
    /// @param liquidity The liquidity being valued
    /// @return amount0 The amount of token0
    /// @return amount1 The amount of token1
    function getAmountsForLiquidity(
        uint160 sqrtRatioX96,
        uint160 sqrtRatioAX96,
        uint160 sqrtRatioBX96,
        uint128 liquidity
    ) internal pure returns (uint256 amount0, uint256 amount1) {
        if (sqrtRatioAX96 > sqrtRatioBX96) (sqrtRatioAX96, sqrtRatioBX96) = (sqrtRatioBX96, sqrtRatioAX96);

        if (sqrtRatioX96 <= sqrtRatioAX96) {
            amount0 = getAmount0ForLiquidity(sqrtRatioAX96, sqrtRatioBX96, liquidity);
        } else if (sqrtRatioX96 < sqrtRatioBX96) {
            amount0 = getAmount0ForLiquidity(sqrtRatioX96, sqrtRatioBX96, liquidity);
            amount1 = getAmount1ForLiquidity(sqrtRatioAX96, sqrtRatioX96, liquidity);
        } else {
            amount1 = getAmount1ForLiquidity(sqrtRatioAX96, sqrtRatioBX96, liquidity);
        }
    }
}


// File contracts/Oracle/ComboOracle_KyberSwapElasticV2.sol


// ====================================================================
// |     ______                   _______                             |
// |    / _____________ __  __   / ____(_____  ____ _____  ________   |
// |   / /_  / ___/ __ `| |/_/  / /_  / / __ \/ __ `/ __ \/ ___/ _ \  |
// |  / __/ / /  / /_/ _>  <   / __/ / / / / / /_/ / / / / /__/  __/  |
// | /_/   /_/   \__,_/_/|_|  /_/   /_/_/ /_/\__,_/_/ /_/\___/\___/   |
// |                                                                  |
// ====================================================================
// ================ ComboOracle_KyberSwapElasticV2 ================
// ====================================================================
// Aggregates KyberSwapElastic V2 NFTs (similar to UniV3)
// Unofficial repo: https://github.com/0xamogh/kyberswap_elastic

// Frax Finance: https://github.com/FraxFinance

// Primary Author(s)
// Travis Moore: https://github.com/FortisFortuna

// Reviewer(s) / Contributor(s)
// Sam Kazemian: https://github.com/samkazemian



// ComboOracle

// KyberSwap Elastic (similar to UniV3)







contract ComboOracle_KyberSwapElasticV2 is Owned {
    using SafeMath for uint256;
    
    /* ========== STATE VARIABLES ========== */
    
    // Core addresses
    address timelock_address;

    // Oracle info
    ComboOracle public combo_oracle;

    // KyberSwap Elastic
    IFactory public kyber_factory;
    IBasePositionManager public kyber_positions_mgr;
    IRouter public kyber_router;
    ITickFeesReader public kyber_tick_fees_reader;

    // Precision
    uint256 public PRECISE_PRICE_PRECISION = 1e18;
    uint256 public PRICE_PRECISION = 1e6;
    uint256 public PRICE_MISSING_MULTIPLIER = 1e12;

    /* ========== STRUCTS ========== */

    // ------------ KyberSwap Elastic ------------

    struct NFTBasicInfo {
        address token0;
        address token1;
        uint24 fee;
        int24 tickLower;
        int24 tickUpper;
        uint128 liquidity;
        uint256 token0_decimals; 
        uint256 token1_decimals; 
        uint256 lowest_decimals; 
    }

    struct NFTValuationMiddleInputs {
        uint160 sqrtPriceX96;
        uint160 sqrtRatioAX96;
        uint160 sqrtRatioBX96;
        uint256 liq_pricing_divisor;
        uint128 liq_in_with_divisor;
    }

    struct NFTValueInfo {
        uint256 token0_val_usd;
        uint256 token1_val_usd;
        uint256 total_value_usd;
        string token0_symbol;
        string token1_symbol;
        uint256 usd_per_liq;
        uint256 pool_tvl_usd;
    }
    
    /* ========== CONSTRUCTOR ========== */

    constructor (
        address _owner_address,
        address[] memory _starting_addresses
    ) Owned(_owner_address) {
        // Oracle info
        combo_oracle = ComboOracle(_starting_addresses[0]);

        // KyberSwap Elastic
        // https://docs.kyberswap.com/contract/deployment
        kyber_factory = IFactory(_starting_addresses[1]);
        kyber_positions_mgr = IBasePositionManager(_starting_addresses[2]);
        kyber_router = IRouter(_starting_addresses[3]);
        kyber_tick_fees_reader = ITickFeesReader(_starting_addresses[4]);
    }

    /* ========== MODIFIERS ========== */

    modifier onlyByOwnGov() {
        require(msg.sender == owner || msg.sender == timelock_address, "You are not an owner or the governance timelock");
        _;
    }

    /* ========== VIEWS ========== */

    function getNFTBasicInfo(uint256 token_id) public view returns (NFTBasicInfo memory) {
        // Get the position information
        ( 
            IBasePositionManager.Position memory pos, 
            IBasePositionManager.PoolInfo memory info
        ) = kyber_positions_mgr.positions(token_id);

        // Get decimals
        uint256 tkn0_dec = ERC20(info.token0).decimals();
        uint256 tkn1_dec = ERC20(info.token1).decimals();

        return NFTBasicInfo(
            info.token0, // [0]
            info.token1, // [1]
            info.fee, // [2]
            pos.tickLower, // [3]
            pos.tickUpper, // [4]
            pos.liquidity, // [5]
            tkn0_dec,  // [6]
            tkn1_dec,  // [7]
            (tkn0_dec < tkn1_dec) ? tkn0_dec : tkn1_dec // [8]
        );
    }

    // Get stats about a particular NFT
    function getNFTValuationMiddleInputs(uint256 token_id) public view returns (NFTValuationMiddleInputs memory midInputs) {
        NFTBasicInfo memory lp_basic_info = getNFTBasicInfo(token_id);

        // Get pool price info
        {
            address pool_address = kyber_factory.getPool(lp_basic_info.token0, lp_basic_info.token1, lp_basic_info.fee);
            IPool the_pool = IPool(pool_address);
            (midInputs.sqrtPriceX96, , , ) = the_pool.getPoolState();
        }

        // Get the amount of each underlying token in each NFT
        midInputs.sqrtRatioAX96 = TickMath.getSqrtRatioAtTick(lp_basic_info.tickLower);
        midInputs.sqrtRatioBX96 = TickMath.getSqrtRatioAtTick(lp_basic_info.tickUpper);

        // Get amount of each token for 0.01% liquidity movement in each direction
        // midInputs.liq_pricing_divisor = (10 ** lp_basic_info.lowest_decimals);
        midInputs.liq_pricing_divisor = 10000;
        midInputs.liq_in_with_divisor = uint128(lp_basic_info.liquidity / midInputs.liq_pricing_divisor);
            
    }

    // Get stats about a particular NFT
    function getNFTValueInfo(uint256 token_id) public view returns (NFTValueInfo memory nftvi) {
        NFTBasicInfo memory lp_basic_info = getNFTBasicInfo(token_id);

        // Get pool price info
        uint160 sqrtPriceX96;
        address pool_address;
        {
            pool_address = kyber_factory.getPool(lp_basic_info.token0, lp_basic_info.token1, lp_basic_info.fee);
            IPool the_pool = IPool(pool_address);
            (sqrtPriceX96, , , ) = the_pool.getPoolState();
        }
        require((sqrtPriceX96) > 0, "getPoolState sqrtPriceX96 is 0");

        // Tick math
        {
            // Get the amount of each underlying token in each NFT
            uint160 sqrtRatioAX96 = TickMath.getSqrtRatioAtTick(lp_basic_info.tickLower);
            uint160 sqrtRatioBX96 = TickMath.getSqrtRatioAtTick(lp_basic_info.tickUpper);

            // Get amount of each token for 0.01% liquidity movement in each direction
            // uint256 liq_pricing_divisor = (10 ** lp_basic_info.lowest_decimals);
            uint256 liq_pricing_divisor = 10000;
            (uint256 token0_1pm_amt, uint256 token1_1pm_amt) = LiquidityAmounts.getAmountsForLiquidity(sqrtPriceX96, sqrtRatioAX96, sqrtRatioBX96, uint128(lp_basic_info.liquidity / liq_pricing_divisor));
            require((token0_1pm_amt + token1_1pm_amt) > 0, "getAmountsForLiquidity was 0");

            // Get missing decimals
            uint256 token0_miss_dec_mult = 10 ** (uint(18) - lp_basic_info.token0_decimals);
            uint256 token1_miss_dec_mult = 10 ** (uint(18) - lp_basic_info.token1_decimals);

            // Get token prices
            // Will revert if ComboOracle doesn't have a price for both token0 and token1
            (uint256 token0_precise_price, , ) = combo_oracle.getTokenPrice(lp_basic_info.token0);
            (uint256 token1_precise_price, , ) = combo_oracle.getTokenPrice(lp_basic_info.token1);

            // Get the value of each portion
            // Multiply by liq_pricing_divisor as well
            nftvi.token0_val_usd = (token0_1pm_amt * liq_pricing_divisor * token0_precise_price * token0_miss_dec_mult) / PRECISE_PRICE_PRECISION;
            nftvi.token1_val_usd = (token1_1pm_amt * liq_pricing_divisor * token1_precise_price * token1_miss_dec_mult) / PRECISE_PRICE_PRECISION;
        
            // Get the pool TVL
            nftvi.pool_tvl_usd = (ERC20(lp_basic_info.token0).balanceOf(pool_address) * token0_precise_price * token0_miss_dec_mult) / PRECISE_PRICE_PRECISION;
            nftvi.pool_tvl_usd += (ERC20(lp_basic_info.token1).balanceOf(pool_address) * token1_precise_price * token1_miss_dec_mult) / PRECISE_PRICE_PRECISION;
        }

        // Remaining values
        nftvi.total_value_usd = (nftvi.token0_val_usd + nftvi.token1_val_usd);
        nftvi.token0_symbol = ERC20(lp_basic_info.token0).symbol();
        nftvi.token1_symbol = ERC20(lp_basic_info.token1).symbol();
        nftvi.usd_per_liq = (nftvi.total_value_usd * PRECISE_PRICE_PRECISION) / uint256(lp_basic_info.liquidity);

    }

    function getFeeCollectionMulticallPayload(
        uint256 token_id, 
        address tkn0_addr, 
        address tkn1_addr, 
        uint24 fee, 
        address dest_addr
    ) external view returns (bytes[] memory multicall_payloads, uint256 tk0_owed, uint256 tk1_owed, bool has_rewards) {
        address pool_address = kyber_factory.getPool(tkn0_addr, tkn1_addr, fee);
        (tk0_owed, tk1_owed) = kyber_tick_fees_reader.getTotalFeesOwedToPosition(address(kyber_positions_mgr), pool_address, token_id);

        // Will return an empty payload array unless there is actually something to collect
        has_rewards = ((tk0_owed + tk1_owed) > 0);
        if (has_rewards) {
            multicall_payloads = new bytes[](4);
            multicall_payloads[0] = abi.encodeWithSignature(
                "removeLiquidity(uint256,uint128,uint256,uint256,uint256)", 
                token_id, 
                1, 
                0,
                0,
                7289575165 // Year 2200
            );
            multicall_payloads[1] = abi.encodeWithSignature(
                "burnRTokens(uint256,uint256,uint256,uint256)", 
                token_id, 
                0, 
                0,
                7289575165 // Year 2200
            );
            multicall_payloads[2] = abi.encodeWithSignature(
                "transferAllTokens(address,uint256,address)", 
                tkn0_addr, 
                tk0_owed, 
                dest_addr
            );
            multicall_payloads[3] = abi.encodeWithSignature(
                "transferAllTokens(address,uint256,address)", 
                tkn1_addr, 
                tk1_owed, 
                dest_addr
            );
        }
        else {
            multicall_payloads = new bytes[](0);
        }
    }

    function checkKyberElasticNFT(uint256 seed_nft_id, uint256 test_nft_id) external view returns (uint256 liquidity, int24 tick_lower, int24 tick_upper) {
        // Get the seed NFT info
        ( 
            IBasePositionManager.Position memory pos_seed, 
            IBasePositionManager.PoolInfo memory info_seed
        ) = kyber_positions_mgr.positions(seed_nft_id);
        
        // Get the test NFT info
        ( 
            IBasePositionManager.Position memory pos_test, 
            IBasePositionManager.PoolInfo memory info_test
        ) = kyber_positions_mgr.positions(test_nft_id);

        // Set initially
        liquidity = pos_test.liquidity;

        // Do the checks
        if (
            (info_test.token0 == info_seed.token0) && 
            (info_test.token1 == info_seed.token1) && 
            (info_test.fee == info_seed.fee) && 
            (pos_test.tickLower == pos_seed.tickLower) && 
            (pos_test.tickUpper == pos_seed.tickUpper)
        ) {
            // Do nothing
        }
        else {
            revert("Wrong token characteristics");
        }
        return (liquidity, pos_test.tickLower, pos_test.tickUpper);
    }


    /* ========== RESTRICTED GOVERNANCE FUNCTIONS ========== */

    function setTimelock(address _timelock_address) external onlyByOwnGov {
        timelock_address = _timelock_address;
    }

    function setComboOracle(address _combo_oracle) external onlyByOwnGov {
        combo_oracle = ComboOracle(_combo_oracle);
    }

    function setMiscAddrs(
        address _factory, 
        address _positions_nft_manager, 
        address _router,
        address _tick_fees_reader
    ) external onlyByOwnGov {
        // KyberSwap Elastic
        kyber_factory = IFactory(_factory);
        kyber_positions_mgr = IBasePositionManager(_positions_nft_manager);
        kyber_router = IRouter(_router);
        kyber_tick_fees_reader = ITickFeesReader(_tick_fees_reader);
    }
}


// File contracts/Misc_AMOs/kyberswap/elastic/IKyberSwapFarmingToken.sol


interface IKyberSwapFarmingToken {
  function DOMAIN_SEPARATOR (  ) external view returns ( bytes32 );
  function allowance ( address owner, address spender ) external view returns ( uint256 );
  function approve ( address spender, uint256 amount ) external returns ( bool );
  function balanceOf ( address account ) external view returns ( uint256 );
  function burn ( uint256 amount ) external;
  function burn ( address account, uint256 amount ) external;
  function burnFrom ( address account, uint256 amount ) external;
  function decimals (  ) external view returns ( uint8 );
  function decreaseAllowance ( address spender, uint256 subtractedValue ) external returns ( bool );
  function increaseAllowance ( address spender, uint256 addedValue ) external returns ( bool );
  function mint ( address account, uint256 amount ) external;
  function name (  ) external view returns ( string memory );
  function nonces ( address owner ) external view returns ( uint256 );
  function operator (  ) external view returns ( address );
  function permit ( address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) external;
  function symbol (  ) external view returns ( string memory );
  function totalSupply (  ) external view returns ( uint256 );
  function transfer ( address recipient, uint256 amount ) external returns ( bool );
  function transferFrom ( address sender, address recipient, uint256 amount ) external returns ( bool );
}


// File contracts/Curve/IFraxGaugeController.sol


// https://github.com/swervefi/swerve/edit/master/packages/swerve-contracts/interfaces/IGaugeController.sol

interface IFraxGaugeController {
    struct Point {
        uint256 bias;
        uint256 slope;
    }

    struct VotedSlope {
        uint256 slope;
        uint256 power;
        uint256 end;
    }

    // Public variables
    function admin() external view returns (address);
    function future_admin() external view returns (address);
    function token() external view returns (address);
    function voting_escrow() external view returns (address);
    function n_gauge_types() external view returns (int128);
    function n_gauges() external view returns (int128);
    function gauge_type_names(int128) external view returns (string memory);
    function gauges(uint256) external view returns (address);
    function vote_user_slopes(address, address)
        external
        view
        returns (VotedSlope memory);
    function vote_user_power(address) external view returns (uint256);
    function last_user_vote(address, address) external view returns (uint256);
    function points_weight(address, uint256)
        external
        view
        returns (Point memory);
    function time_weight(address) external view returns (uint256);
    function points_sum(int128, uint256) external view returns (Point memory);
    function time_sum(uint256) external view returns (uint256);
    function points_total(uint256) external view returns (uint256);
    function time_total() external view returns (uint256);
    function points_type_weight(int128, uint256)
        external
        view
        returns (uint256);
    function time_type_weight(uint256) external view returns (uint256);

    // Getter functions
    function gauge_types(address) external view returns (int128);
    function gauge_relative_weight(address) external view returns (uint256);
    function gauge_relative_weight(address, uint256) external view returns (uint256);
    function get_gauge_weight(address) external view returns (uint256);
    function get_type_weight(int128) external view returns (uint256);
    function get_total_weight() external view returns (uint256);
    function get_weights_sum_per_type(int128) external view returns (uint256);

    // External functions
    function commit_transfer_ownership(address) external;
    function apply_transfer_ownership() external;
    function add_gauge(
        address,
        int128,
        uint256
    ) external;
    function checkpoint() external;
    function checkpoint_gauge(address) external;
    function global_emission_rate() external view returns (uint256);
    function gauge_relative_weight_write(address)
        external
        returns (uint256);
    function gauge_relative_weight_write(address, uint256)
        external
        returns (uint256);
    function add_type(string memory, uint256) external;
    function change_type_weight(int128, uint256) external;
    function change_gauge_weight(address, uint256) external;
    function change_global_emission_rate(uint256) external;
    function vote_for_gauge_weights(address, uint256) external;
}


// File contracts/Curve/IFraxGaugeFXSRewardsDistributor.sol


interface IFraxGaugeFXSRewardsDistributor {
  function acceptOwnership() external;
  function curator_address() external view returns(address);
  function currentReward(address gauge_address) external view returns(uint256 reward_amount);
  function distributeReward(address gauge_address) external returns(uint256 weeks_elapsed, uint256 reward_tally);
  function distributionsOn() external view returns(bool);
  function gauge_whitelist(address) external view returns(bool);
  function is_middleman(address) external view returns(bool);
  function last_time_gauge_paid(address) external view returns(uint256);
  function nominateNewOwner(address _owner) external;
  function nominatedOwner() external view returns(address);
  function owner() external view returns(address);
  function recoverERC20(address tokenAddress, uint256 tokenAmount) external;
  function setCurator(address _new_curator_address) external;
  function setGaugeController(address _gauge_controller_address) external;
  function setGaugeState(address _gauge_address, bool _is_middleman, bool _is_active) external;
  function setTimelock(address _new_timelock) external;
  function timelock_address() external view returns(address);
  function toggleDistributions() external;
}


// File contracts/Curve/IveFXS.sol


interface IveFXS {

    struct LockedBalance {
        int128 amount;
        uint256 end;
    }

    function commit_transfer_ownership(address addr) external;
    function apply_transfer_ownership() external;
    function commit_smart_wallet_checker(address addr) external;
    function apply_smart_wallet_checker() external;
    function toggleEmergencyUnlock() external;
    function recoverERC20(address token_addr, uint256 amount) external;
    function get_last_user_slope(address addr) external view returns (int128);
    function user_point_history__ts(address _addr, uint256 _idx) external view returns (uint256);
    function locked__end(address _addr) external view returns (uint256);
    function checkpoint() external;
    function deposit_for(address _addr, uint256 _value) external;
    function create_lock(uint256 _value, uint256 _unlock_time) external;
    function increase_amount(uint256 _value) external;
    function increase_unlock_time(uint256 _unlock_time) external;
    function withdraw() external;
    function balanceOf(address addr) external view returns (uint256);
    function balanceOf(address addr, uint256 _t) external view returns (uint256);
    function balanceOfAt(address addr, uint256 _block) external view returns (uint256);
    function totalSupply() external view returns (uint256);
    function totalSupply(uint256 t) external view returns (uint256);
    function totalSupplyAt(uint256 _block) external view returns (uint256);
    function totalFXSSupply() external view returns (uint256);
    function totalFXSSupplyAt(uint256 _block) external view returns (uint256);
    function changeController(address _newController) external;
    function token() external view returns (address);
    function supply() external view returns (uint256);
    function locked(address addr) external view returns (LockedBalance memory);
    function epoch() external view returns (uint256);
    function point_history(uint256 arg0) external view returns (int128 bias, int128 slope, uint256 ts, uint256 blk, uint256 fxs_amt);
    function user_point_history(address arg0, uint256 arg1) external view returns (int128 bias, int128 slope, uint256 ts, uint256 blk, uint256 fxs_amt);
    function user_point_epoch(address arg0) external view returns (uint256);
    function slope_changes(uint256 arg0) external view returns (int128);
    function controller() external view returns (address);
    function transfersEnabled() external view returns (bool);
    function emergencyUnlockActive() external view returns (bool);
    function name() external view returns (string memory);
    function symbol() external view returns (string memory);
    function version() external view returns (string memory);
    function decimals() external view returns (uint256);
    function future_smart_wallet_checker() external view returns (address);
    function smart_wallet_checker() external view returns (address);
    function admin() external view returns (address);
    function future_admin() external view returns (address);
}


// File contracts/Math/Math.sol


/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library Math {
    /**
     * @dev Returns the largest of two numbers.
     */
    function max(uint256 a, uint256 b) internal pure returns (uint256) {
        return a >= b ? a : b;
    }

    /**
     * @dev Returns the smallest of two numbers.
     */
    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        return a < b ? a : b;
    }

    /**
     * @dev Returns the average of two numbers. The result is rounded towards
     * zero.
     */
    function average(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b) / 2 can overflow, so we distribute
        return (a / 2) + (b / 2) + ((a % 2 + b % 2) / 2);
    }

    // babylonian method (https://en.wikipedia.org/wiki/Methods_of_computing_square_roots#Babylonian_method)
    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;
        }
    }
}


// File contracts/Misc_AMOs/bunni/IBunniGauge.sol


interface IBunniGauge {
  function deposit ( uint256 _value ) external;
  function deposit ( uint256 _value, address _addr ) external;
  function deposit ( uint256 _value, address _addr, bool _claim_rewards ) external;
  function withdraw ( uint256 _value ) external;
  function withdraw ( uint256 _value, bool _claim_rewards ) external;
  function claim_rewards (  ) external;
  function claim_rewards ( address _addr ) external;
  function claim_rewards ( address _addr, address _receiver ) external;
  function transferFrom ( address _from, address _to, uint256 _value ) external returns ( bool );
  function transfer ( address _to, uint256 _value ) external returns ( bool );
  function approve ( address _spender, uint256 _value ) external returns ( bool );
  function permit ( address _owner, address _spender, uint256 _value, uint256 _deadline, uint8 _v, bytes32 _r, bytes32 _s ) external returns ( bool );
  function increaseAllowance ( address _spender, uint256 _added_value ) external returns ( bool );
  function decreaseAllowance ( address _spender, uint256 _subtracted_value ) external returns ( bool );
  function user_checkpoint ( address addr ) external returns ( bool );
  function set_rewards_receiver ( address _receiver ) external;
  function kick ( address addr ) external;
  function deposit_reward_token ( address _reward_token, uint256 _amount ) external;
  function add_reward ( address _reward_token, address _distributor ) external;
  function set_reward_distributor ( address _reward_token, address _distributor ) external;
  function makeGaugePermissionless (  ) external;
  function killGauge (  ) external;
  function unkillGauge (  ) external;
  function change_pending_admin ( address new_pending_admin ) external;
  function claim_admin (  ) external;
  function set_tokenless_production ( uint8 new_tokenless_production ) external;
  function claimed_reward ( address _addr, address _token ) external view returns ( uint256 );
  function claimable_reward ( address _user, address _reward_token ) external view returns ( uint256 );
  function claimable_tokens ( address addr ) external returns ( uint256 );
  function integrate_checkpoint (  ) external view returns ( uint256 );
  function future_epoch_time (  ) external view returns ( uint256 );
  function inflation_rate (  ) external view returns ( uint256 );
  function decimals (  ) external view returns ( uint256 );
  function version (  ) external view returns ( string memory );
  function allowance ( address owner, address spender ) external view returns ( uint256 );
  function is_killed (  ) external view returns ( bool );
  function initialize ( address _lp_token, uint256 relative_weight_cap, address _voting_escrow_delegation, address _admin, bytes32 _position_key ) external;
  function setRelativeWeightCap ( uint256 relative_weight_cap ) external;
  function getRelativeWeightCap (  ) external view returns ( uint256 );
  function getCappedRelativeWeight ( uint256 time ) external view returns ( uint256 );
  function getMaxRelativeWeightCap (  ) external pure returns ( uint256 );
  function tokenless_production (  ) external view returns ( uint8 );
  function pending_admin (  ) external view returns ( address );
  function admin (  ) external view returns ( address );
  function voting_escrow_delegation (  ) external view returns ( address );
  function balanceOf ( address arg0 ) external view returns ( uint256 );
  function totalSupply (  ) external view returns ( uint256 );
  function name (  ) external view returns ( string memory );
  function symbol (  ) external view returns ( string memory );
  function DOMAIN_SEPARATOR (  ) external view returns ( bytes32 );
  function nonces ( address arg0 ) external view returns ( uint256 );
  function lp_token (  ) external view returns ( address );
  function gauge_state (  ) external view returns ( uint8 );
  function position_key (  ) external view returns ( bytes32 );
  function reward_count (  ) external view returns ( uint256 );
//   function reward_data ( address arg0 ) external view returns ( tuple );
  function rewards_receiver ( address arg0 ) external view returns ( address );
  function reward_integral_for ( address arg0, address arg1 ) external view returns ( uint256 );
  function working_balances ( address arg0 ) external view returns ( uint256 );
  function working_supply (  ) external view returns ( uint256 );
  function integrate_inv_supply_of ( address arg0 ) external view returns ( uint256 );
  function integrate_checkpoint_of ( address arg0 ) external view returns ( uint256 );
  function integrate_fraction ( address arg0 ) external view returns ( uint256 );
  function period (  ) external view returns ( int128 );
  function reward_tokens ( uint256 arg0 ) external view returns ( address );
  function period_timestamp ( uint256 arg0 ) external view returns ( uint256 );
  function integrate_inv_supply ( uint256 arg0 ) external view returns ( uint256 );
}


// File contracts/Misc_AMOs/bunni/IBunniMinter.sol


interface IBunniMinter {
  function allowed_to_mint_for ( address minter, address user ) external view returns ( bool );
  function getGaugeController (  ) external view returns ( address );
  function getMinterApproval ( address minter, address user ) external view returns ( bool );
  function getToken (  ) external view returns ( address );
  function getTokenAdmin (  ) external view returns ( address );
  function mint ( address gauge ) external returns ( uint256 );
  function mintFor ( address gauge, address user ) external returns ( uint256 );
  function mintMany ( address[] memory gauges ) external returns ( uint256 );
  function mintManyFor ( address[] memory gauges, address user ) external returns ( uint256 );
  function mint_for ( address gauge, address user ) external;
  function mint_many ( address[8] memory gauges ) external;
  function minted ( address user, address gauge ) external view returns ( uint256 );
  function setMinterApproval ( address minter, bool approval ) external;
  function toggle_approve_mint ( address minter ) external;
}


// File contracts/Uniswap/TransferHelper.sol


// helper methods for interacting with ERC20 tokens and sending ETH that do not consistently return true/false
library TransferHelper {
    function safeApprove(address token, address to, uint value) internal {
        // bytes4(keccak256(bytes('approve(address,uint256)')));
        (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x095ea7b3, to, value));
        require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: APPROVE_FAILED');
    }

    function safeTransfer(address token, address to, uint value) internal {
        // bytes4(keccak256(bytes('transfer(address,uint256)')));
        (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0xa9059cbb, to, value));
        require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: TRANSFER_FAILED');
    }

    function safeTransferFrom(address token, address from, address to, uint value) internal {
        // bytes4(keccak256(bytes('transferFrom(address,address,uint256)')));
        (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x23b872dd, from, to, value));
        require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: TRANSFER_FROM_FAILED');
    }

    function safeTransferETH(address to, uint value) internal {
        (bool success,) = to.call{value:value}(new bytes(0));
        require(success, 'TransferHelper: ETH_TRANSFER_FAILED');
    }
}


// File contracts/Utils/ReentrancyGuard.sol


/**
 * @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 () internal {
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and make it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        // On the first call to nonReentrant, _notEntered will be true
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

        // Any calls to nonReentrant after this point will fail
        _status = _ENTERED;

        _;

        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = _NOT_ENTERED;
    }
}


// File contracts/Staking/FraxUnifiedFarmTemplate.sol


// ====================================================================
// |     ______                   _______                             |
// |    / _____________ __  __   / ____(_____  ____ _____  ________   |
// |   / /_  / ___/ __ `| |/_/  / /_  / / __ \/ __ `/ __ \/ ___/ _ \  |
// |  / __/ / /  / /_/ _>  <   / __/ / / / / / /_/ / / / / /__/  __/  |
// | /_/   /_/   \__,_/_/|_|  /_/   /_/_/ /_/\__,_/_/ /_/\___/\___/   |
// |                                                                  |
// ====================================================================
// ====================== FraxUnifiedFarmTemplate =====================
// ====================================================================
// Farming contract that accounts for veFXS
// Overrideable for UniV3, ERC20s, etc
// New for V2
//      - Multiple reward tokens possible
//      - Can add to existing locked stakes
//      - Contract is aware of proxied veFXS
//      - veFXS multiplier formula changed
// Apes together strong

// Frax Finance: https://github.com/FraxFinance

// Primary Author(s)
// Travis Moore: https://github.com/FortisFortuna

// Reviewer(s) / Contributor(s)
// Jason Huan: https://github.com/jasonhuan
// Sam Kazemian: https://github.com/samkazemian
// Dennis: github.com/denett

// Originally inspired by Synthetix.io, but heavily modified by the Frax team
// (Locked, veFXS, and UniV3 portions are new)
// https://raw.githubusercontent.com/Synthetixio/synthetix/develop/contracts/StakingRewards.sol








// Extra rewards



// import "../Misc_AMOs/convex/IConvexBaseRewardPool.sol";

contract FraxUnifiedFarmTemplate is Owned, ReentrancyGuard {


    // -------------------- VARIES --------------------

    // // Bunni
    // IBunniGauge public stakingToken;
    // IBunniLens public lens = IBunniLens(0xb73F303472C4fD4FF3B9f59ce0F9b13E47fbfD19);
    // IBunniMinter public minter = IBunniMinter(0xF087521Ffca0Fa8A43F5C445773aB37C5f574DA0);

    /* ========== STATE VARIABLES ========== */

    // Instances
    IveFXS private constant veFXS = IveFXS(0xc8418aF6358FFddA74e09Ca9CC3Fe03Ca6aDC5b0);
    
    // Frax related
    address internal constant frax_address = 0x853d955aCEf822Db058eb8505911ED77F175b99e;
    /// @notice fraxPerLPToken is a public view function, although doesn't show the stored value
    uint256 public fraxPerLPStored;

    // Constant for various precisions
    uint256 internal constant MULTIPLIER_PRECISION = 1e18;

    // Time tracking
    /// @notice Ending timestamp for the current period
    uint256 public periodFinish;
    /// @notice Timestamp of the last update - when this period started
    uint256 public lastUpdateTime;

    // Lock time and multiplier settings
    uint256 public lock_max_multiplier = uint256(2e18); // E18. 1x = e18
    uint256 public lock_time_for_max_multiplier = 1 * 1095 * 86400; // 3 years
    // uint256 public lock_time_for_max_multiplier = 2 * 86400; // 2 days
    uint256 public lock_time_min = 0; // 0 sec

    // veFXS related
    uint256 public vefxs_boost_scale_factor = uint256(4e18); // E18. 4x = 4e18; 100 / scale_factor = % vefxs supply needed for max boost
    uint256 public vefxs_max_multiplier = uint256(2e18); // E18. 1x = 1e18
    uint256 public vefxs_per_frax_for_max_boost = uint256(4e18); // E18. 2e18 means 2 veFXS must be held by the staker per 1 FRAX
    mapping(address => uint256) internal _vefxsMultiplierStored;
    mapping(address => bool) internal valid_vefxs_proxies;
    mapping(address => mapping(address => bool)) internal proxy_allowed_stakers;

    // Reward addresses, gauge addresses, reward rates, and reward managers
    /// @notice token addr -> manager addr
    mapping(address => address) public rewardManagers; 
    address[] internal rewardTokens;
    address[] internal gaugeControllers;
    address[] internal rewardDistributors;
    uint256[] internal rewardRatesManual;
    mapping(address => bool) internal isRewardToken;
    /// @notice token addr -> token index
    mapping(address => uint256) public rewardTokenAddrToIdx;
    
    // Reward period
    uint256 public constant rewardsDuration = 604800; // 7 * 86400  (7 days)

    // Reward tracking
    uint256[] private rewardsPerTokenStored;
    mapping(address => mapping(uint256 => uint256)) private userRewardsPerTokenPaid; // staker addr -> token id -> paid amount
    mapping(address => mapping(uint256 => uint256)) private rewards; // staker addr -> token id -> reward amount
    mapping(address => uint256) public lastRewardClaimTime; // staker addr -> timestamp
    
    // Gauge tracking
    uint256[] private last_gauge_relative_weights;
    uint256[] private last_gauge_time_totals;

    // Balance tracking
    uint256 internal _total_liquidity_locked;
    uint256 internal _total_combined_weight;
    mapping(address => uint256) internal _locked_liquidity;
    mapping(address => uint256) internal _combined_weights;
    /// @notice Keeps track of LP balances proxy-wide. Needed to make sure the proxy boost is kept in line
    mapping(address => uint256) public proxy_lp_balances; 


    /// @notice Stakers set which proxy(s) they want to use
    /// @dev Keep public so users can see on the frontend if they have a proxy
    mapping(address => address) public staker_designated_proxies;

    // Admin booleans for emergencies and overrides
    bool public stakesUnlocked; // Release locked stakes in case of emergency
    bool internal withdrawalsPaused; // For emergencies
    bool internal rewardsCollectionPaused; // For emergencies
    bool internal stakingPaused; // For emergencies
    bool internal collectRewardsOnWithdrawalPaused; // For emergencies if a token is overemitted

    /* ========== STRUCTS ========== */
    // In children...


    /* ========== MODIFIERS ========== */

    modifier onlyByOwnGov() {
        require(msg.sender == owner || msg.sender == 0x8412ebf45bAC1B340BbE8F318b928C466c4E39CA, "Not owner or timelock");
        _;
    }

    modifier onlyTknMgrs(address reward_token_address) {
        require(msg.sender == owner || isTokenManagerFor(msg.sender, reward_token_address), "Not owner or tkn mgr");
        _;
    }

    modifier updateRewardAndBalanceMdf(address account, bool sync_too) {
        _updateRewardAndBalance(account, sync_too, false);
        _;
    }

    /* ========== CONSTRUCTOR ========== */

    constructor (
        address _owner,
        address[] memory _rewardTokens,
        address[] memory _rewardManagers,
        uint256[] memory _rewardRatesManual,
        address[] memory _gaugeControllers,
        address[] memory _rewardDistributors
    ) Owned(_owner) {

        // Address arrays
        rewardTokens = _rewardTokens;
        gaugeControllers = _gaugeControllers;
        rewardDistributors = _rewardDistributors;
        rewardRatesManual = _rewardRatesManual;

        for (uint256 i = 0; i < _rewardTokens.length; i++){ 
            // For fast token address -> token ID lookups later
            rewardTokenAddrToIdx[_rewardTokens[i]] = i;

            // Add to the mapping
            isRewardToken[_rewardTokens[i]] = true;

            // Initialize the stored rewards
            rewardsPerTokenStored.push(0);

            // Initialize the reward managers
            rewardManagers[_rewardTokens[i]] = _rewardManagers[i];

            // Push in empty relative weights to initialize the array
            last_gauge_relative_weights.push(0);

            // Push in empty time totals to initialize the array
            last_gauge_time_totals.push(0);
        }

        // Other booleans
        stakesUnlocked = false;

        // Initialization
        lastUpdateTime = block.timestamp;

        // Sync the first period finish here with the gauge's 
        // periodFinish = IFraxGaugeController(gaugeControllers[0]).time_total();
        periodFinish = IFraxGaugeController(0x3669C421b77340B2979d1A00a792CC2ee0FcE737).time_total();
        
    }

    /* ============= VIEWS ============= */

    // ------ REWARD RELATED ------

    /// @notice Checks if the caller is a manager for the reward token
    /// @param caller_addr The address of the caller
    /// @param reward_token_addr The address of the reward token
    /// @return bool True if the caller is a manager for the reward token
    function isTokenManagerFor(address caller_addr, address reward_token_addr) public view returns (bool){
        if (!isRewardToken[reward_token_addr]) return false;
        else if (caller_addr == address(0) || reward_token_addr == address(0)) return false;
        else if (caller_addr == owner) return true; // Contract owner
        else if (rewardManagers[reward_token_addr] == caller_addr) return true; // Reward manager
        return false; 
    }

    /// @notice Gets all the reward tokens this contract handles
    /// @return rewardTokens_ The reward tokens array
    function getAllRewardTokens() external view returns (address[] memory) {
        return rewardTokens;
    }

    // Last time the reward was applicable
    function lastTimeRewardApplicable() internal view returns (uint256) {
        return Math.min(block.timestamp, periodFinish);
    }

    /// @notice The amount of reward tokens being paid out per second this period
    /// @param token_idx The index of the reward token
    /// @return rwd_rate The reward rate
    function rewardRates(uint256 token_idx) public view returns (uint256 rwd_rate) {
        address gauge_controller_address = gaugeControllers[token_idx];
        if (gauge_controller_address != address(0)) {
            rwd_rate = (IFraxGaugeController(gauge_controller_address).global_emission_rate() * last_gauge_relative_weights[token_idx]) / 1e18;
        }
        else {
            rwd_rate = rewardRatesManual[token_idx];
        }
    }

    // Amount of reward tokens per LP token / liquidity unit
    function rewardsPerToken() public view returns (uint256[] memory newRewardsPerTokenStored) {
        if (_total_liquidity_locked == 0 || _total_combined_weight == 0) {
            return rewardsPerTokenStored;
        }
        else {
            newRewardsPerTokenStored = new uint256[](rewardTokens.length);
            for (uint256 i = 0; i < rewardsPerTokenStored.length; i++){ 
                newRewardsPerTokenStored[i] = rewardsPerTokenStored[i] + (
                    ((lastTimeRewardApplicable() - lastUpdateTime) * rewardRates(i) * 1e18) / _total_combined_weight
                );
            }
            return newRewardsPerTokenStored;
        }
    }

    /// @notice The amount of reward tokens an account has earned / accrued
    /// @dev In the edge-case of one of the account's stake expiring since the last claim, this will
    /// @param account The account to check
    /// @return new_earned Array of reward token amounts earned by the account
    function earned(address account) public view returns (uint256[] memory new_earned) {
        uint256[] memory reward_arr = rewardsPerToken();
        new_earned = new uint256[](rewardTokens.length);

        if (_combined_weights[account] > 0){
            for (uint256 i = 0; i < rewardTokens.length; i++){ 
                new_earned[i] = ((_combined_weights[account] * (reward_arr[i] - userRewardsPerTokenPaid[account][i])) / 1e18)
                                + rewards[account][i];
            }
        }
    }

    /// @notice The total reward tokens emitted in the given period
    /// @return rewards_per_duration_arr Array of reward token amounts emitted in the current period
    function getRewardForDuration() external view returns (uint256[] memory rewards_per_duration_arr) {
        rewards_per_duration_arr = new uint256[](rewardRatesManual.length);

        for (uint256 i = 0; i < rewardRatesManual.length; i++){ 
            rewards_per_duration_arr[i] = rewardRates(i) * rewardsDuration;
        }
    }


    // ------ LIQUIDITY AND WEIGHTS ------

    /// @notice The farm's total locked liquidity / LP tokens
    /// @return The total locked liquidity
    function totalLiquidityLocked() external view returns (uint256) {
        return _total_liquidity_locked;
    }

    /// @notice A user's locked liquidity / LP tokens
    /// @param account The address of the account
    /// @return The locked liquidity
    function lockedLiquidityOf(address account) external view returns (uint256) {
        return _locked_liquidity[account];
    }

    /// @notice The farm's total combined weight of all users
    /// @return The total combined weight
    function totalCombinedWeight() external view returns (uint256) {
        return _total_combined_weight;
    }

    /// @notice Total 'balance' used for calculating the percent of the pool the account owns
    /// @notice Takes into account the locked stake time multiplier and veFXS multiplier
    /// @param account The address of the account
    /// @return The combined weight
    function combinedWeightOf(address account) external view returns (uint256) {
        return _combined_weights[account];
    }

    /// @notice Calculates the combined weight for an account
    /// @notice Must be overriden by the child contract
    /// @dev account The address of the account
    function calcCurCombinedWeight(address account) public virtual view 
        returns (
            uint256 old_combined_weight,
            uint256 new_vefxs_multiplier,
            uint256 new_combined_weight
        )
    {
        revert("Need cCCW logic");
    }

    // ------ LOCK RELATED ------

    /// @notice Reads the lock boost multiplier for a given duration
    /// @param secs The duration of the lock in seconds
    /// @return The multiplier amount
    function lockMultiplier(uint256 secs) public view returns (uint256) {
        return Math.min(
            lock_max_multiplier,
            (secs * lock_max_multiplier) / lock_time_for_max_multiplier
        ) ;
    }

    // ------ FRAX RELATED ------

    /// @notice The amount of FRAX denominated value being boosted that an address has staked
    /// @param account The address to check
    /// @return The amount of FRAX value boosted
    function userStakedFrax(address account) public view returns (uint256) {
        return (fraxPerLPStored * _locked_liquidity[account]) / MULTIPLIER_PRECISION;
    }

    /// @notice The amount of FRAX denominated value being boosted that a proxy address has staked
    /// @param proxy_address The address to check
    /// @return The amount of FRAX value boosted
    function proxyStakedFrax(address proxy_address) public view returns (uint256) {
        return (fraxPerLPStored * proxy_lp_balances[proxy_address]) / MULTIPLIER_PRECISION;
    }

    /// @notice The maximum LP that can get max veFXS boosted for a given address at its current veFXS balance
    /// @param account The address to check
    /// @return The maximum LP that can get max veFXS boosted for a given address at its current veFXS balance
    function maxLPForMaxBoost(address account) external view returns (uint256) {
        return (veFXS.balanceOf(account) * MULTIPLIER_PRECISION * MULTIPLIER_PRECISION) / (vefxs_per_frax_for_max_boost * fraxPerLPStored);
    }

    /// @notice Must be overriden to return the current FRAX per LP token
    /// @return The current number of FRAX per LP token
    function fraxPerLPToken() public virtual view returns (uint256) {
        revert("Need fPLPT logic");
    }

    // ------ veFXS RELATED ------

    /// @notice The minimum veFXS required to get max boost for a given address
    /// @param account The address to check
    /// @return The minimum veFXS required to get max boost
    function minVeFXSForMaxBoost(address account) public view returns (uint256) {
        return (userStakedFrax(account) * vefxs_per_frax_for_max_boost) / MULTIPLIER_PRECISION;
    }

    /// @notice The minimum veFXS required to get max boost for a given proxy
    /// @param proxy_address The proxy address
    /// @return The minimum veFXS required to get max boost
    function minVeFXSForMaxBoostProxy(address proxy_address) public view returns (uint256) {
        return (proxyStakedFrax(proxy_address) * vefxs_per_frax_for_max_boost) / MULTIPLIER_PRECISION;
    }

    /// @notice Looks up a staker's proxy
    /// @param addr The address to check
    /// @return the_proxy The proxy address, or address(0)
    function getProxyFor(address addr) public view returns (address){
        if (valid_vefxs_proxies[addr]) {
            // If addr itself is a proxy, return that.
            // If it farms itself directly, it should use the shared LP tally in proxyStakedFrax
            return addr;
        }
        else {
            // Otherwise, return the proxy, or address(0)
            return staker_designated_proxies[addr];
        }
    }

    /// @notice The multiplier for a given account, based on veFXS
    /// @param account The account to check
    /// @return vefxs_multiplier The multiplier boost for the account
    function veFXSMultiplier(address account) public view returns (uint256 vefxs_multiplier) {
        // Use either the user's or their proxy's veFXS balance
        uint256 vefxs_bal_to_use = 0;
        address the_proxy = getProxyFor(account);
        vefxs_bal_to_use = (the_proxy == address(0)) ? veFXS.balanceOf(account) : veFXS.balanceOf(the_proxy);

        // First option based on fraction of total veFXS supply, with an added scale factor
        uint256 mult_optn_1 = (vefxs_bal_to_use * vefxs_max_multiplier * vefxs_boost_scale_factor) 
                            / (veFXS.totalSupply() * MULTIPLIER_PRECISION);
        
        // Second based on old method, where the amount of FRAX staked comes into play
        uint256 mult_optn_2;
        {
            uint256 veFXS_needed_for_max_boost;

            // Need to use proxy-wide FRAX balance if applicable, to prevent exploiting
            veFXS_needed_for_max_boost = (the_proxy == address(0)) ? minVeFXSForMaxBoost(account) : minVeFXSForMaxBoostProxy(the_proxy);

            if (veFXS_needed_for_max_boost > 0){ 
                uint256 user_vefxs_fraction = (vefxs_bal_to_use * MULTIPLIER_PRECISION) / veFXS_needed_for_max_boost;
                
                mult_optn_2 = (user_vefxs_fraction * vefxs_max_multiplier) / MULTIPLIER_PRECISION;
            }
            else mult_optn_2 = 0; // This will happen with the first stake, when user_staked_frax is 0
        }

        // Select the higher of the two
        vefxs_multiplier = (mult_optn_1 > mult_optn_2 ? mult_optn_1 : mult_optn_2);

        // Cap the boost to the vefxs_max_multiplier
        if (vefxs_multiplier > vefxs_max_multiplier) vefxs_multiplier = vefxs_max_multiplier;
    }

    /* =============== MUTATIVE FUNCTIONS =============== */

    /// @notice Toggle whether a staker can use the proxy's veFXS balance to boost yields
    /// @notice Proxy must call this first, then the staker must call stakerSetVeFXSProxy
    function proxyToggleStaker(address staker_address) external {
        require(valid_vefxs_proxies[msg.sender], "Invalid proxy");
        proxy_allowed_stakers[msg.sender][staker_address] = !proxy_allowed_stakers[msg.sender][staker_address]; 

        // Disable the staker's set proxy if it was the toggler and is currently on
        if (staker_designated_proxies[staker_address] == msg.sender){
            staker_designated_proxies[staker_address] = address(0); 

            // Remove the LP as well
            proxy_lp_balances[msg.sender] -= _locked_liquidity[staker_address];
        }
    }

    /// @notice After proxy toggles staker to true, staker must call and confirm this
    /// @param proxy_address The address of the veFXS proxy
    function stakerSetVeFXSProxy(address proxy_address) external {
        require(valid_vefxs_proxies[proxy_address], "Invalid proxy");
        require(proxy_allowed_stakers[proxy_address][msg.sender], "Proxy has not allowed you yet");
        
        // Corner case sanity check to make sure LP isn't double counted
        address old_proxy_addr = staker_designated_proxies[msg.sender];
        if (old_proxy_addr != address(0)) {
            // Remove the LP count from the old proxy
            proxy_lp_balances[old_proxy_addr] -= _locked_liquidity[msg.sender];
        }

        // Set the new proxy
        staker_designated_proxies[msg.sender] = proxy_address; 

        // Add the the LP as well
        proxy_lp_balances[proxy_address] += _locked_liquidity[msg.sender];
    }

    // ------ STAKING ------
    // In children...


    // ------ WITHDRAWING ------
    // In children...


    // ------ REWARDS SYNCING ------

    function _updateRewardAndBalance(address account, bool sync_too) internal {
        _updateRewardAndBalance(account, sync_too, false);
    }

    function _updateRewardAndBalance(address account, bool sync_too, bool pre_sync_vemxstored) internal {
        // Need to retro-adjust some things if the period hasn't been renewed, then start a new one
        if (sync_too){
            sync();
        }

        // Used to make sure the veFXS multiplier is correct if a stake is increased, before calcCurCombinedWeight
        if (pre_sync_vemxstored){
            _vefxsMultiplierStored[account] = veFXSMultiplier(account);
        }
        
        if (account != address(0)) {
            // To keep the math correct, the user's combined weight must be recomputed to account for their
            // ever-changing veFXS balance.
            (   
                uint256 old_combined_weight,
                uint256 new_vefxs_multiplier,
                uint256 new_combined_weight
            ) = calcCurCombinedWeight(account);

            // Calculate the earnings first
            _syncEarned(account);

            // Update the user's stored veFXS multipliers
            _vefxsMultiplierStored[account] = new_vefxs_multiplier;

            // Update the user's and the global combined weights
            if (new_combined_weight >= old_combined_weight) {
                uint256 weight_diff = new_combined_weight - old_combined_weight;
                _total_combined_weight = _total_combined_weight + weight_diff;
                _combined_weights[account] = old_combined_weight + weight_diff;
            } else {
                uint256 weight_diff = old_combined_weight - new_combined_weight;
                _total_combined_weight = _total_combined_weight - weight_diff;
                _combined_weights[account] = old_combined_weight - weight_diff;
            }

        }
    }

    function _syncEarned(address account) internal {
        if (account != address(0)) {
            // Calculate the earnings
            uint256[] memory earned_arr = earned(account);

            // Update the rewards array
            for (uint256 i = 0; i < earned_arr.length; i++){ 
                rewards[account][i] = earned_arr[i];
            }

            // Update the rewards paid array
            for (uint256 i = 0; i < earned_arr.length; i++){ 
                userRewardsPerTokenPaid[account][i] = rewardsPerTokenStored[i];
            }
        }
    }


    // ------ REWARDS CLAIMING ------

    /// @notice A function that can be overridden to add extra logic to the getReward function
    /// @param destination_address The address to send the rewards to
    function getRewardExtraLogic(address destination_address) public nonReentrant {
        require(rewardsCollectionPaused == false, "Rewards collection paused");
        return _getRewardExtraLogic(msg.sender, destination_address);
    }

    function _getRewardExtraLogic(address rewardee, address destination_address) internal virtual {
        revert("Need gREL logic");
    }

    // Two different getReward functions are needed because of delegateCall and msg.sender issues
    // For backwards-compatibility
    /// @notice Claims rewards to destination address
    /// @param destination_address The address to send the rewards to
    /// @return rewards_before The rewards available before the claim
    function getReward(address destination_address) external nonReentrant returns (uint256[] memory) {
        return _getReward(msg.sender, destination_address, true);
    }

    /// @notice Claims rewards to destination address & wether to do extra logic
    /// @param destination_address The address to send the rewards to
    /// @param claim_extra_too Whether to do extra logic
    /// @return rewards_before The rewards available before the claim
    function getReward2(address destination_address, bool claim_extra_too) external nonReentrant returns (uint256[] memory) {
        return _getReward(msg.sender, destination_address, claim_extra_too);
    }

    // No withdrawer == msg.sender check needed since this is only internally callable
    function _getReward(address rewardee, address destination_address, bool do_extra_logic) internal updateRewardAndBalanceMdf(rewardee, true) returns (uint256[] memory rewards_before) {
        // Update the last reward claim time first, as an extra reentrancy safeguard
        lastRewardClaimTime[rewardee] = block.timestamp;
        
        // Make sure rewards collection isn't paused
        require(rewardsCollectionPaused == false, "Rewards collection paused");
        
        // Update the rewards array and distribute rewards
        rewards_before = new uint256[](rewardTokens.length);

        for (uint256 i = 0; i < rewardTokens.length; i++){ 
            rewards_before[i] = rewards[rewardee][i];
            rewards[rewardee][i] = 0;
            if (rewards_before[i] > 0) {
                TransferHelper.safeTransfer(rewardTokens[i], destination_address, rewards_before[i]);

                emit RewardPaid(rewardee, rewards_before[i], rewardTokens[i], destination_address);
            }
        }

        // Handle additional reward logic
        if (do_extra_logic) {
            _getRewardExtraLogic(rewardee, destination_address);
        }
    }


    // ------ FARM SYNCING ------

    // If the period expired, renew it
    function retroCatchUp() internal {
        // Catch up the old rewards first
        _updateStoredRewardsAndTime();

        // Pull in rewards from the rewards distributor, if applicable
        for (uint256 i = 0; i < rewardDistributors.length; i++){ 
            address reward_distributor_address = rewardDistributors[i];
            if (reward_distributor_address != address(0)) {
                IFraxGaugeFXSRewardsDistributor(reward_distributor_address).distributeReward(address(this));
            }
        }

        // 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 num_periods_elapsed = uint256(block.timestamp - periodFinish) / rewardsDuration; // Floor division to the nearest period
        
        // Make sure there are enough tokens to renew the reward period
        for (uint256 i = 0; i < rewardTokens.length; i++){ 
            require((rewardRates(i) * rewardsDuration * (num_periods_elapsed + 1)) <= IERC20(rewardTokens[i]).balanceOf(address(this)), string(abi.encodePacked("Not enough reward tokens available: ", rewardTokens[i])) );
        }
        
        // uint256 old_lastUpdateTime = lastUpdateTime;
        // uint256 new_lastUpdateTime = block.timestamp;

        // lastUpdateTime = periodFinish;
        periodFinish = periodFinish + ((num_periods_elapsed + 1) * rewardsDuration);

        // // Bunni oLIT rewards
        // // ==========================================
        // // Pull in rewards and set the reward rate for one week, based off of that
        // // If the rewards get messed up for some reason, set this to 0 and it will skip
        // // Should only be called once per week max
        // if (rewardRatesManual[1] != 0) {
        //     // oLIT
        //     // ====================================
        //     uint256 olit_before = IERC20(rewardTokens[1]).balanceOf(address(this));
        //     minter.mint(address(stakingToken));
        //     uint256 olit_after = IERC20(rewardTokens[1]).balanceOf(address(this));

        //     // Set the new reward rate
        //     rewardRatesManual[1] = (olit_after - olit_before) / rewardsDuration;
        // }

        // CONVEX EXTRA REWARDS (OLD METHOD)
        // ==========================================
        // Pull in rewards and set the reward rate for one week, based off of that
        // If the rewards get messed up for some reason, set this to 0 and it will skip
        // if (rewardRatesManual[1] != 0 && rewardRatesManual[2] != 0) {
        //     // CRV & CVX
        //     // ====================================
        //     uint256 crv_before = ERC20(rewardTokens[1]).balanceOf(address(this));
        //     uint256 cvx_before = ERC20(rewardTokens[2]).balanceOf(address(this));
        //     IConvexBaseRewardPool(0x329cb014b562d5d42927cfF0dEdF4c13ab0442EF).getReward(
        //         address(this),
        //         true
        //     );
        //     uint256 crv_after = ERC20(rewardTokens[1]).balanceOf(address(this));
        //     uint256 cvx_after = ERC20(rewardTokens[2]).balanceOf(address(this));

        //     // Set the new reward rate
        //     rewardRatesManual[1] = (crv_after - crv_before) / rewardsDuration;
        //     rewardRatesManual[2] = (cvx_after - cvx_before) / rewardsDuration;
        // }

        // Make sure everything is caught up again
        _updateStoredRewardsAndTime();
    }

    function _updateStoredRewardsAndTime() internal {
        // Get the rewards
        uint256[] memory rewards_per_token = rewardsPerToken();

        // Update the rewardsPerTokenStored
        for (uint256 i = 0; i < rewardsPerTokenStored.length; i++){ 
            rewardsPerTokenStored[i] = rewards_per_token[i];
        }

        // Update the last stored time
        lastUpdateTime = lastTimeRewardApplicable();
    }

    /// @notice Updates the gauge weights, if applicable
    /// @param force_update If true, will update the weights even if the time hasn't elapsed
    function sync_gauge_weights(bool force_update) public {
        // Loop through the gauge controllers
        for (uint256 i = 0; i < gaugeControllers.length; i++){ 
            address gauge_controller_address = gaugeControllers[i];
            if (gauge_controller_address != address(0)) {
                if (force_update || (block.timestamp > last_gauge_time_totals[i])){
                    // Update the gauge_relative_weight
                    last_gauge_relative_weights[i] = IFraxGaugeController(gauge_controller_address).gauge_relative_weight_write(address(this), block.timestamp);
                    last_gauge_time_totals[i] = IFraxGaugeController(gauge_controller_address).time_total();
                }
            }
        }
    }

    /// @notice Updates gauge weights, fraxPerLP, pulls in new rewards or updates rewards
    function sync() public {
        // Sync the gauge weight, if applicable
        sync_gauge_weights(false);

        // Update the fraxPerLPStored
        fraxPerLPStored = fraxPerLPToken();

        if (block.timestamp >= periodFinish) {
            retroCatchUp();
        }
        else {
            _updateStoredRewardsAndTime();
        }
    }

    /* ========== RESTRICTED FUNCTIONS - Curator callable ========== */
    
    // ------ FARM SYNCING ------
    // In children...

    // ------ PAUSES ------

    /// @notice Owner or governance can pause/unpause staking, withdrawals, rewards collection, and collectRewardsOnWithdrawal
    /// @param _stakingPaused Whether staking is paused
    /// @param _withdrawalsPaused Whether withdrawals are paused
    /// @param _rewardsCollectionPaused Whether rewards collection is paused
    /// @param _collectRewardsOnWithdrawalPaused Whether collectRewardsOnWithdrawal is paused
    function setPauses(
        bool _stakingPaused,
        bool _withdrawalsPaused,
        bool _rewardsCollectionPaused,
        bool _collectRewardsOnWithdrawalPaused
    ) external onlyByOwnGov {
        stakingPaused = _stakingPaused;
        withdrawalsPaused = _withdrawalsPaused;
        rewardsCollectionPaused = _rewardsCollectionPaused;
        collectRewardsOnWithdrawalPaused = _collectRewardsOnWithdrawalPaused;
    }

    /* ========== RESTRICTED FUNCTIONS - Owner or timelock only ========== */
    
    /// @notice Owner or governance can unlock stakes - irreversible!
    function unlockStakes() external onlyByOwnGov {
        stakesUnlocked = !stakesUnlocked;
    }

    /// @notice Owner or governance sets whether an address is a valid veFXS proxy
    /// @param _proxy_addr The address to set
    function toggleValidVeFXSProxy(address _proxy_addr) external onlyByOwnGov {
        valid_vefxs_proxies[_proxy_addr] = !valid_vefxs_proxies[_proxy_addr];
    }

    /// @notice Allows owner to recover any ERC20 or token manager to recover their reward token.
    /// @param tokenAddress The address of the token to recover
    /// @param tokenAmount The amount of the token to recover
    function recoverERC20(address tokenAddress, uint256 tokenAmount) external onlyTknMgrs(tokenAddress) {
        // Check if the desired token is a reward token
        bool isRewTkn = isRewardToken[tokenAddress];

        // Only the reward managers can take back their reward tokens
        // Also, other tokens, like the staking token, airdrops, or accidental deposits, can be withdrawn by the owner
        if (
                (isRewTkn && rewardManagers[tokenAddress] == msg.sender)
                || (!isRewTkn && (msg.sender == owner))
            ) {
            TransferHelper.safeTransfer(tokenAddress, msg.sender, tokenAmount);
            return;
        }
        // If none of the above conditions are true
        else {
            revert("No valid tokens to recover");
        }
    }

    /// @notice Sets multiple variables at once
    /// @param _misc_vars The variables to set:
    /// [0]: uint256 _lock_max_multiplier,
    /// [1] uint256 _vefxs_max_multiplier,
    /// [2] uint256 _vefxs_per_frax_for_max_boost,
    /// [3] uint256 _vefxs_boost_scale_factor,
    /// [4] uint256 _lock_time_for_max_multiplier,
    /// [5] uint256 _lock_time_min
    /// [6] uint256 _max_stake_limit (must be at greater or equal to old value)
    function setMiscVariables(
        uint256[6] memory _misc_vars
        // [0]: uint256 _lock_max_multiplier, 
        // [1] uint256 _vefxs_max_multiplier, 
        // [2] uint256 _vefxs_per_frax_for_max_boost,
        // [3] uint256 _vefxs_boost_scale_factor,
        // [4] uint256 _lock_time_for_max_multiplier,
        // [5] uint256 _lock_time_min
    ) external onlyByOwnGov {
        require(_misc_vars[0] >= MULTIPLIER_PRECISION, "Must be >= MUL PREC");
        require((_misc_vars[1] >= 0) && (_misc_vars[2] >= 0) && (_misc_vars[3] >= 0) && (_misc_vars[5] >= 0), "Must be >= 0");
        require((_misc_vars[4] >= 1), "Must be >= 1");

        lock_max_multiplier = _misc_vars[0];
        vefxs_max_multiplier = _misc_vars[1];
        vefxs_per_frax_for_max_boost = _misc_vars[2];
        vefxs_boost_scale_factor = _misc_vars[3];
        lock_time_for_max_multiplier = _misc_vars[4];
        lock_time_min = _misc_vars[5];
    }

    // The owner or the reward token managers can set reward rates 
        /// @notice Allows owner or reward token managers to set the reward rate for a given reward token
    /// @param reward_token_address The address of the reward token
    /// @param _new_rate The new reward rate (token amount divided by reward period duration)
    /// @param _gauge_controller_address The address of the gauge controller for this reward token
    /// @param _rewards_distributor_address The address of the rewards distributor for this reward token
    function setRewardVars(address reward_token_address, uint256 _new_rate, address _gauge_controller_address, address _rewards_distributor_address) external onlyTknMgrs(reward_token_address) {
        rewardRatesManual[rewardTokenAddrToIdx[reward_token_address]] = _new_rate;
        gaugeControllers[rewardTokenAddrToIdx[reward_token_address]] = _gauge_controller_address;
        rewardDistributors[rewardTokenAddrToIdx[reward_token_address]] = _rewards_distributor_address;
    }

    // The owner or the reward token managers can change managers
    /// @notice Allows owner or reward token managers to change the reward manager for a given reward token
    /// @param reward_token_address The address of the reward token
    /// @param new_manager_address The new reward manager address
    function changeTokenManager(address reward_token_address, address new_manager_address) external onlyTknMgrs(reward_token_address) {
        rewardManagers[reward_token_address] = new_manager_address;
    }

    /* ========== EVENTS ========== */
    event RewardPaid(address indexed user, uint256 amount, address token_address, address destination_address);

    /* ========== A CHICKEN ========== */
    //
    //         ,~.
    //      ,-'__ `-,
    //     {,-'  `. }              ,')
    //    ,( a )   `-.__         ,',')~,
    //   <=.) (         `-.__,==' ' ' '}
    //     (   )                      /)
    //      `-'\   ,                    )
    //          |  \        `~.        /
    //          \   `._        \      /
    //           \     `._____,'    ,'
    //            `-.             ,'
    //               `-._     _,-'
    //                   77jj'
    //                  //_||
    //               __//--'/`
    //             ,--'/`  '
    //
    // [hjw] https://textart.io/art/vw6Sa3iwqIRGkZsN1BC2vweF/chicken
}


// File contracts/Staking/FraxUnifiedFarm_ERC20.sol


// ====================================================================
// |     ______                   _______                             |
// |    / _____________ __  __   / ____(_____  ____ _____  ________   |
// |   / /_  / ___/ __ `| |/_/  / /_  / / __ \/ __ `/ __ \/ ___/ _ \  |
// |  / __/ / /  / /_/ _>  <   / __/ / / / / / /_/ / / / / /__/  __/  |
// | /_/   /_/   \__,_/_/|_|  /_/   /_/_/ /_/\__,_/_/ /_/\___/\___/   |
// |                                                                  |
// ====================================================================
// ======================= FraxUnifiedFarm_ERC20 ======================
// ====================================================================
// For ERC20 Tokens
// Uses FraxUnifiedFarmTemplate.sol

// -------------------- VARIES --------------------

// Bunni
// import "../Misc_AMOs/bunni/IBunniGauge.sol";

// Convex wrappers
// import "../Curve/ICurvefrxETHETHPool.sol";
// import "../Misc_AMOs/convex/IConvexStakingWrapperFrax.sol";
// import "../Misc_AMOs/convex/IDepositToken.sol";
// import "../Misc_AMOs/curve/I2pool.sol";
// import "../Misc_AMOs/curve/I2poolToken.sol";
// import "../Misc_AMOs/curve/I2poolTokenNoLending.sol";

// Fraxlend
// import '../Fraxlend/IFraxlendPair.sol';

// Fraxswap
// import '../Fraxswap/core/interfaces/IFraxswapPair.sol';

// G-UNI
// import "../Misc_AMOs/gelato/IGUniPool.sol";

// KyberSwap Elastic KyberSwapFarmingToken (KS-FT)

// mStable
// import '../Misc_AMOs/mstable/IFeederPool.sol';

// StakeDAO sdETH-FraxPut
// import '../Misc_AMOs/stakedao/IOpynPerpVault.sol';

// StakeDAO Vault
// import '../Misc_AMOs/stakedao/IStakeDaoVault.sol';

// Uniswap V2
// import '../Uniswap/Interfaces/IUniswapV2Pair.sol';

// Vesper
// import '../Misc_AMOs/vesper/IVPool.sol';

// ------------------------------------------------

contract FraxUnifiedFarm_ERC20 is FraxUnifiedFarmTemplate {

    /* ========== STATE VARIABLES ========== */

    // -------------------- COMMON -------------------- 
    bool internal frax_is_token0;

    // -------------------- VARIES --------------------

    // Convex crvUSD/FRAX
    // IConvexStakingWrapperFrax public stakingToken;
    // I2poolTokenNoLending public curveToken;
    // ICurvefrxETHETHPool public curvePool;

    // Convex stkcvxFPIFRAX, stkcvxFRAXBP, etc
    // IConvexStakingWrapperFrax public stakingToken;
    // I2poolToken public curveToken;
    // I2pool public curvePool;
    // ICurvefrxETHETHPool public curvePool;

    // Fraxswap
    // IFraxswapPair public stakingToken;

    // Fraxlend
    // IFraxlendPair public stakingToken;

    // G-UNI
    // IGUniPool public stakingToken;

    // KyberSwap Elastic KyberSwapFarmingToken (KS-FT)
    IKyberSwapFarmingToken public stakingToken;
    
    // mStable
    // IFeederPool public stakingToken;

    // sdETH-FraxPut Vault
    // IOpynPerpVault public stakingToken;

    // StakeDAO Vault
    // IStakeDaoVault public stakingToken;

    // Uniswap V2
    // IUniswapV2Pair public stakingToken;

    // Vesper
    // IVPool public stakingToken;

    // ------------------------------------------------

    // Stake tracking
    mapping(address => LockedStake[]) public lockedStakes;

    /* ========== STRUCTS ========== */

    // Struct for the stake
    struct LockedStake {
        bytes32 kek_id;
        uint256 start_timestamp;
        uint256 liquidity;
        uint256 ending_timestamp;
        uint256 lock_multiplier; // 6 decimals of precision. 1x = 1000000
    }
    
    /* ========== CONSTRUCTOR ========== */

    constructor (
        address _owner,
        address[] memory _rewardTokens,
        address[] memory _rewardManagers,
        uint256[] memory _rewardRatesManual,
        address[] memory _gaugeControllers,
        address[] memory _rewardDistributors,
        address _stakingToken
    ) 
    FraxUnifiedFarmTemplate(_owner, _rewardTokens, _rewardManagers, _rewardRatesManual, _gaugeControllers, _rewardDistributors)
    {

        // -------------------- VARIES (USE CHILD FOR LOGIC) --------------------

        // Bunni
        // USE CHILD

        // Convex stkcvxFPIFRAX, stkcvxFRAXBP, etc
        // USE CHILD

        // Fraxlend
        // USE CHILD

        // Fraxswap
        // USE CHILD

        // G-UNI
        // stakingToken = IGUniPool(_stakingToken);
        // address token0 = address(stakingToken.token0());
        // frax_is_token0 = (token0 == frax_address);

        // KyberSwap Elastic KyberSwapFarmingToken (KS-FT)
        stakingToken = IKyberSwapFarmingToken(_stakingToken);

        // mStable
        // stakingToken = IFeederPool(_stakingToken);

        // StakeDAO sdETH-FraxPut Vault
        // stakingToken = IOpynPerpVault(_stakingToken);

        // StakeDAO Vault
        // stakingToken = IStakeDaoVault(_stakingToken);

        // Uniswap V2
        // stakingToken = IUniswapV2Pair(_stakingToken);
        // address token0 = stakingToken.token0();
        // if (token0 == frax_address) frax_is_token0 = true;
        // else frax_is_token0 = false;

        // Vesper
        // stakingToken = IVPool(_stakingToken);
    }

    /* ============= VIEWS ============= */

    // ------ FRAX RELATED ------

    function fraxPerLPToken() public virtual view override returns (uint256) {
        // Get the amount of FRAX 'inside' of the lp tokens
        uint256 frax_per_lp_token;

        // Bunni
        // ============================================
        // USE CHILD

        // Convex stkcvxFPIFRAX and stkcvxFRAXBP only
        // ============================================
        // USE CHILD

        // Convex Stable/FRAXBP
        // ============================================
        // USE CHILD

        // Convex Volatile/FRAXBP
        // ============================================
        // USE CHILD

        // Fraxlend
        // ============================================
        // USE CHILD

        // Fraxswap
        // ============================================
        // USE CHILD

        // G-UNI
        // ============================================
        // {
        //     (uint256 reserve0, uint256 reserve1) = stakingToken.getUnderlyingBalances();
        //     uint256 total_frax_reserves = frax_is_token0 ? reserve0 : reserve1;

        //     frax_per_lp_token = (total_frax_reserves * 1e18) / stakingToken.totalSupply();
        // }

        // KyberSwap Elastic KyberSwapFarmingToken (KS-FT)
        // ============================================
        // USE CHILD

        // mStable
        // ============================================
        // {
        //     uint256 total_frax_reserves;
        //     (, IFeederPool.BassetData memory vaultData) = (stakingToken.getBasset(frax_address));
        //     total_frax_reserves = uint256(vaultData.vaultBalance);
        //     frax_per_lp_token = (total_frax_reserves * 1e18) / stakingToken.totalSupply();
        // }

        // StakeDAO sdETH-FraxPut Vault
        // ============================================
        // {
        //    uint256 frax3crv_held = stakingToken.totalUnderlyingControlled();
        
        //    // Optimistically assume 50/50 FRAX/3CRV ratio in the metapool to save gas
        //    frax_per_lp_token = ((frax3crv_held * 1e18) / stakingToken.totalSupply()) / 2;
        // }

        // StakeDAO Vault
        // ============================================
        // {
        //    uint256 frax3crv_held = stakingToken.balance();
        
        //    // Optimistically assume 50/50 FRAX/3CRV ratio in the metapool to save gas
        //    frax_per_lp_token = ((frax3crv_held * 1e18) / stakingToken.totalSupply()) / 2;
        // }

        // Uniswap V2
        // ============================================
        // {
        //     uint256 total_frax_reserves;
        //     (uint256 reserve0, uint256 reserve1, ) = (stakingToken.getReserves());
        //     if (frax_is_token0) total_frax_reserves = reserve0;
        //     else total_frax_reserves = reserve1;

        //     frax_per_lp_token = (total_frax_reserves * 1e18) / stakingToken.totalSupply();
        // }

        // Vesper
        // ============================================
        // frax_per_lp_token = stakingToken.pricePerShare();

        return frax_per_lp_token;
    }

    // ------ LIQUIDITY AND WEIGHTS ------
    function calcCurrLockMultiplier(address account, uint256 stake_idx) public view returns (uint256 midpoint_lock_multiplier) {
        // Get the stake
        LockedStake memory thisStake = lockedStakes[account][stake_idx];

        // Handles corner case where user never claims for a new stake
        // Don't want the multiplier going above the max
        uint256 accrue_start_time;
        if (lastRewardClaimTime[account] < thisStake.start_timestamp) {
            accrue_start_time = thisStake.start_timestamp;
        }
        else {
            accrue_start_time = lastRewardClaimTime[account];
        }
        
        // If the lock is expired
        if (thisStake.ending_timestamp <= block.timestamp) {
            // If the lock expired in the time since the last claim, the weight needs to be proportionately averaged this time
            if (lastRewardClaimTime[account] < thisStake.ending_timestamp){
                uint256 time_before_expiry = thisStake.ending_timestamp - accrue_start_time;
                uint256 time_after_expiry = block.timestamp - thisStake.ending_timestamp;

                // Average the pre-expiry lock multiplier
                uint256 pre_expiry_avg_multiplier = lockMultiplier(time_before_expiry / 2);

                // Get the weighted-average lock_multiplier
                // uint256 numerator = (pre_expiry_avg_multiplier * time_before_expiry) + (MULTIPLIER_PRECISION * time_after_expiry);
                uint256 numerator = (pre_expiry_avg_multiplier * time_before_expiry) + (0 * time_after_expiry);
                midpoint_lock_multiplier = numerator / (time_before_expiry + time_after_expiry);
            }
            else {
                // Otherwise, it needs to just be 1x
                // midpoint_lock_multiplier = MULTIPLIER_PRECISION;

                // Otherwise, it needs to just be 0x
                midpoint_lock_multiplier = 0;
            }
        }
        // If the lock is not expired
        else {
            // Decay the lock multiplier based on the time left
            uint256 avg_time_left;
            {
                uint256 time_left_p1 = thisStake.ending_timestamp - accrue_start_time;
                uint256 time_left_p2 = thisStake.ending_timestamp - block.timestamp;
                avg_time_left = (time_left_p1 + time_left_p2) / 2;
            }
            midpoint_lock_multiplier = lockMultiplier(avg_time_left);
        }

        // Sanity check: make sure it never goes above the initial multiplier
        if (midpoint_lock_multiplier > thisStake.lock_multiplier) midpoint_lock_multiplier = thisStake.lock_multiplier;
    }

    // Calculate the combined weight for an account
    function calcCurCombinedWeight(address account) public override view
        returns (
            uint256 old_combined_weight,
            uint256 new_vefxs_multiplier,
            uint256 new_combined_weight
        )
    {
        // Get the old combined weight
        old_combined_weight = _combined_weights[account];

        // Get the veFXS multipliers
        // For the calculations, use the midpoint (analogous to midpoint Riemann sum)
        new_vefxs_multiplier = veFXSMultiplier(account);

        uint256 midpoint_vefxs_multiplier;
        if (
            (_locked_liquidity[account] == 0 && _combined_weights[account] == 0) || 
            (new_vefxs_multiplier >= _vefxsMultiplierStored[account])
        ) {
            // This is only called for the first stake to make sure the veFXS multiplier is not cut in half
            // Also used if the user increased or maintained their position
            midpoint_vefxs_multiplier = new_vefxs_multiplier;
        }
        else {
            // Handles natural decay with a non-increased veFXS position
            midpoint_vefxs_multiplier = (new_vefxs_multiplier + _vefxsMultiplierStored[account]) / 2;
        }

        // Loop through the locked stakes, first by getting the liquidity * lock_multiplier portion
        new_combined_weight = 0;
        for (uint256 i = 0; i < lockedStakes[account].length; i++) {
            LockedStake memory thisStake = lockedStakes[account][i];

            // Calculate the midpoint lock multiplier
            uint256 midpoint_lock_multiplier = calcCurrLockMultiplier(account, i);

            // Calculate the combined boost
            uint256 liquidity = thisStake.liquidity;
            uint256 combined_boosted_amount = liquidity + ((liquidity * (midpoint_lock_multiplier + midpoint_vefxs_multiplier)) / MULTIPLIER_PRECISION);
            new_combined_weight += combined_boosted_amount;
        }
    }

    // ------ LOCK RELATED ------

    // All the locked stakes for a given account
    function lockedStakesOf(address account) external view returns (LockedStake[] memory) {
        return lockedStakes[account];
    }

    // Returns the length of the locked stakes for a given account
    function lockedStakesOfLength(address account) external view returns (uint256) {
        return lockedStakes[account].length;
    }

    // // All the locked stakes for a given account [old-school method]
    // function lockedStakesOfMultiArr(address account) external view returns (
    //     bytes32[] memory kek_ids,
    //     uint256[] memory start_timestamps,
    //     uint256[] memory liquidities,
    //     uint256[] memory ending_timestamps,
    //     uint256[] memory lock_multipliers
    // ) {
    //     for (uint256 i = 0; i < lockedStakes[account].length; i++){ 
    //         LockedStake memory thisStake = lockedStakes[account][i];
    //         kek_ids[i] = thisStake.kek_id;
    //         start_timestamps[i] = thisStake.start_timestamp;
    //         liquidities[i] = thisStake.liquidity;
    //         ending_timestamps[i] = thisStake.ending_timestamp;
    //         lock_multipliers[i] = thisStake.lock_multiplier;
    //     }
    // }

    /* =============== MUTATIVE FUNCTIONS =============== */

    // ------ STAKING ------

    function _updateLiqAmts(address staker_address, uint256 amt, bool is_add) internal {
        // Get the proxy address
        address the_proxy = getProxyFor(staker_address);

        if (is_add) {
            // Update total liquidities
            _total_liquidity_locked += amt;
            _locked_liquidity[staker_address] += amt;

            // Update the proxy
            if (the_proxy != address(0)) proxy_lp_balances[the_proxy] += amt;
        }
        else {
            // Update total liquidities
            _total_liquidity_locked -= amt;
            _locked_liquidity[staker_address] -= amt;

            // Update the proxy
            if (the_proxy != address(0)) proxy_lp_balances[the_proxy] -= amt;
        }

        // Need to call to update the combined weights
        _updateRewardAndBalance(staker_address, false, true);
    }

    function _getStake(address staker_address, bytes32 kek_id) internal view returns (LockedStake memory locked_stake, uint256 arr_idx) {
        for (uint256 i = 0; i < lockedStakes[staker_address].length; i++){ 
            if (kek_id == lockedStakes[staker_address][i].kek_id){
                locked_stake = lockedStakes[staker_address][i];
                arr_idx = i;
                break;
            }
        }
        require(locked_stake.kek_id == kek_id, "Stake not found");
        
    }

    // Add additional LPs to an existing locked stake
    function lockAdditional(bytes32 kek_id, uint256 addl_liq) nonReentrant updateRewardAndBalanceMdf(msg.sender, true) public {
        // Get the stake and its index
        (LockedStake memory thisStake, uint256 theArrayIndex) = _getStake(msg.sender, kek_id);

        // Calculate the new amount
        uint256 new_amt = thisStake.liquidity + addl_liq;

        // Checks
        require(addl_liq >= 0, "Must be positive");

        // Pull the tokens from the sender
        TransferHelper.safeTransferFrom(address(stakingToken), msg.sender, address(this), addl_liq);

        // Update the stake
        lockedStakes[msg.sender][theArrayIndex] = LockedStake(
            kek_id,
            thisStake.start_timestamp,
            new_amt,
            thisStake.ending_timestamp,
            thisStake.lock_multiplier
        );

        // Update liquidities
        _updateLiqAmts(msg.sender, addl_liq, true);

        emit LockedAdditional(msg.sender, kek_id, addl_liq);
    }

    // Extends the lock of an existing stake
    function lockLonger(bytes32 kek_id, uint256 new_ending_ts) nonReentrant updateRewardAndBalanceMdf(msg.sender, true) public {
        // Get the stake and its index
        (LockedStake memory thisStake, uint256 theArrayIndex) = _getStake(msg.sender, kek_id);

        // Check
        require(new_ending_ts > block.timestamp, "Must be in the future");

        // Calculate some times
        uint256 time_left = (thisStake.ending_timestamp > block.timestamp) ? thisStake.ending_timestamp - block.timestamp : 0;
        uint256 new_secs = new_ending_ts - block.timestamp;

        // Checks
        // require(time_left > 0, "Already expired");
        require(new_secs > time_left, "Cannot shorten lock time");
        require(new_secs >= lock_time_min, "Minimum stake time not met");
        require(new_secs <= lock_time_for_max_multiplier, "Trying to lock for too long");

        // Update the stake
        lockedStakes[msg.sender][theArrayIndex] = LockedStake(
            kek_id,
            block.timestamp,
            thisStake.liquidity,
            new_ending_ts,
            lockMultiplier(new_secs)
        );

        // Need to call to update the combined weights
        _updateRewardAndBalance(msg.sender, false, true);

        emit LockedLonger(msg.sender, kek_id, new_secs, block.timestamp, new_ending_ts);
    }

    

    // Two different stake functions are needed because of delegateCall and msg.sender issues (important for proxies)
    function stakeLocked(uint256 liquidity, uint256 secs) nonReentrant external returns (bytes32) {
        return _stakeLocked(msg.sender, msg.sender, liquidity, secs, block.timestamp);
    }

    // If this were not internal, and source_address had an infinite approve, this could be exploitable
    // (pull funds from source_address and stake for an arbitrary staker_address)
    function _stakeLocked(
        address staker_address,
        address source_address,
        uint256 liquidity,
        uint256 secs,
        uint256 start_timestamp
    ) internal updateRewardAndBalanceMdf(staker_address, true) returns (bytes32) {
        require(stakingPaused == false, "Staking paused");
        require(secs >= lock_time_min, "Minimum stake time not met");
        require(secs <= lock_time_for_max_multiplier,"Trying to lock for too long");

        // Pull in the required token(s)
        // Varies per farm
        TransferHelper.safeTransferFrom(address(stakingToken), source_address, address(this), liquidity);

        // Get the lock multiplier and kek_id
        uint256 lock_multiplier = lockMultiplier(secs);
        bytes32 kek_id = keccak256(abi.encodePacked(staker_address, start_timestamp, liquidity, _locked_liquidity[staker_address]));
        
        // Create the locked stake
        lockedStakes[staker_address].push(LockedStake(
            kek_id,
            start_timestamp,
            liquidity,
            start_timestamp + secs,
            lock_multiplier
        ));

        // Update liquidities
        _updateLiqAmts(staker_address, liquidity, true);

        emit StakeLocked(staker_address, liquidity, secs, kek_id, source_address);

        return kek_id;
    }

    // ------ WITHDRAWING ------

    // Two different withdrawLocked functions are needed because of delegateCall and msg.sender issues (important for proxies)
    function withdrawLocked(bytes32 kek_id, address destination_address, bool claim_rewards) nonReentrant external returns (uint256) {
        require(withdrawalsPaused == false, "Withdrawals paused");
        return _withdrawLocked(msg.sender, destination_address, kek_id, claim_rewards);
    }

    // No withdrawer == msg.sender check needed since this is only internally callable and the checks are done in the wrapper
    function _withdrawLocked(
        address staker_address,
        address destination_address,
        bytes32 kek_id,
        bool claim_rewards
    ) internal returns (uint256) {
        // Collect rewards first and then update the balances
        // collectRewardsOnWithdrawalPaused to be used in an emergency situation if reward is overemitted or not available
        // and the user can forfeit rewards to get their principal back. User can also specify it in withdrawLocked
        if (claim_rewards || !collectRewardsOnWithdrawalPaused) _getReward(staker_address, destination_address, true);
        else {
            // Sync the rewards at least
            _updateRewardAndBalance(staker_address, true, false);
        }

        // Get the stake and its index
        (LockedStake memory thisStake, uint256 theArrayIndex) = _getStake(staker_address, kek_id);
        require(block.timestamp >= thisStake.ending_timestamp || stakesUnlocked == true, "Stake is still locked!");
        uint256 liquidity = thisStake.liquidity;

        if (liquidity > 0) {

            // Give the tokens to the destination_address
            // Should throw if insufficient balance
            TransferHelper.safeTransfer(address(stakingToken), destination_address, liquidity);

            // Remove the stake from the array
            delete lockedStakes[staker_address][theArrayIndex];

            // Update liquidities
            _updateLiqAmts(staker_address, liquidity, false);

            emit WithdrawLocked(staker_address, liquidity, kek_id, destination_address);
        }

        return liquidity;
    }


    function _getRewardExtraLogic(address rewardee, address destination_address) internal override {
        // Do nothing
    }

    /* ========== RESTRICTED FUNCTIONS - Owner or timelock only ========== */

    // Inherited...

    /* ========== EVENTS ========== */
    event LockedAdditional(address indexed user, bytes32 kek_id, uint256 amount);
    event LockedLonger(address indexed user, bytes32 kek_id, uint256 new_secs, uint256 new_start_ts, uint256 new_end_ts);
    event StakeLocked(address indexed user, uint256 amount, uint256 secs, bytes32 kek_id, address source_address);
    event WithdrawLocked(address indexed user, uint256 liquidity, bytes32 kek_id, address destination_address);
}


// File contracts/Misc_AMOs/kyberswap/factory/IKyberFactory.sol


/// @title KyberSwap v2 factory
/// @notice Deploys KyberSwap v2 pools and manages control over government fees
interface IKyberFactory {
  /// @notice Emitted when a pool is created
  /// @param token0 First pool token by address sort order
  /// @param token1 Second pool token by address sort order
  /// @param swapFeeUnits Fee to be collected upon every swap in the pool, in fee units
  /// @param tickDistance Minimum number of ticks between initialized ticks
  /// @param pool The address of the created pool
  event PoolCreated(
    address indexed token0,
    address indexed token1,
    uint24 indexed swapFeeUnits,
    int24 tickDistance,
    address pool
  );

  /// @notice Emitted when a new fee is enabled for pool creation via the factory
  /// @param swapFeeUnits Fee to be collected upon every swap in the pool, in fee units
  /// @param tickDistance Minimum number of ticks between initialized ticks for pools created with the given fee
  event SwapFeeEnabled(uint24 indexed swapFeeUnits, int24 indexed tickDistance);

  /// @notice Emitted when vesting period changes
  /// @param vestingPeriod The maximum time duration for which LP fees
  /// are proportionally burnt upon LP removals
  event VestingPeriodUpdated(uint32 vestingPeriod);

  /// @notice Emitted when configMaster changes
  /// @param oldConfigMaster configMaster before the update
  /// @param newConfigMaster configMaster after the update
  event ConfigMasterUpdated(address oldConfigMaster, address newConfigMaster);

  /// @notice Emitted when fee configuration changes
  /// @param feeTo Recipient of government fees
  /// @param governmentFeeUnits Fee amount, in fee units,
  /// to be collected out of the fee charged for a pool swap
  event FeeConfigurationUpdated(address feeTo, uint24 governmentFeeUnits);

  /// @notice Emitted when whitelist feature is enabled
  event WhitelistEnabled();

  /// @notice Emitted when whitelist feature is disabled
  event WhitelistDisabled();

  /// @notice Returns the maximum time duration for which LP fees
  /// are proportionally burnt upon LP removals
  function vestingPeriod() external view returns (uint32);

  /// @notice Returns the tick distance for a specified fee.
  /// @dev Once added, cannot be updated or removed.
  /// @param swapFeeUnits Swap fee, in fee units.
  /// @return The tick distance. Returns 0 if fee has not been added.
  function feeAmountTickDistance(uint24 swapFeeUnits) external view returns (int24);

  /// @notice Returns the address which can update the fee configuration
  function configMaster() external view returns (address);

  /// @notice Returns the keccak256 hash of the Pool creation code
  /// This is used for pre-computation of pool addresses
  function poolInitHash() external view returns (bytes32);

  /// @notice Fetches the recipient of government fees
  /// and current government fee charged in fee units
  function feeConfiguration() external view returns (address _feeTo, uint24 _governmentFeeUnits);

  /// @notice Returns the status of whitelisting feature of NFT managers
  /// If true, anyone can mint liquidity tokens
  /// Otherwise, only whitelisted NFT manager(s) are allowed to mint liquidity tokens
  function whitelistDisabled() external view returns (bool);

  //// @notice Returns all whitelisted NFT managers
  /// If the whitelisting feature is turned on,
  /// only whitelisted NFT manager(s) are allowed to mint liquidity tokens
  function getWhitelistedNFTManagers() external view returns (address[] memory);

  /// @notice Checks if sender is a whitelisted NFT manager
  /// If the whitelisting feature is turned on,
  /// only whitelisted NFT manager(s) are allowed to mint liquidity tokens
  /// @param sender address to be checked
  /// @return true if sender is a whistelisted NFT manager, false otherwise
  function isWhitelistedNFTManager(address sender) external view returns (bool);

  /// @notice Returns the pool address for a given pair of tokens and a swap fee
  /// @dev Token order does not matter
  /// @param tokenA Contract address of either token0 or token1
  /// @param tokenB Contract address of the other token
  /// @param swapFeeUnits Fee to be collected upon every swap in the pool, in fee units
  /// @return pool The pool address. Returns null address if it does not exist
  function getPool(
    address tokenA,
    address tokenB,
    uint24 swapFeeUnits
  ) external view returns (address pool);

  /// @notice Fetch parameters to be used for pool creation
  /// @dev Called by the pool constructor to fetch the parameters of the pool
  /// @return factory The factory address
  /// @return token0 First pool token by address sort order
  /// @return token1 Second pool token by address sort order
  /// @return swapFeeUnits Fee to be collected upon every swap in the pool, in fee units
  /// @return tickDistance Minimum number of ticks between initialized ticks
  function parameters()
    external
    view
    returns (
      address factory,
      address token0,
      address token1,
      uint24 swapFeeUnits,
      int24 tickDistance
    );

  /// @notice Creates a pool for the given two tokens and fee
  /// @param tokenA One of the two tokens in the desired pool
  /// @param tokenB The other of the two tokens in the desired pool
  /// @param swapFeeUnits Desired swap fee for the pool, in fee units
  /// @dev Token order does not matter. tickDistance is determined from the fee.
  /// Call will revert under any of these conditions:
  ///     1) pool already exists
  ///     2) invalid swap fee
  ///     3) invalid token arguments
  /// @return pool The address of the newly created pool
  function createPool(
    address tokenA,
    address tokenB,
    uint24 swapFeeUnits
  ) external returns (address pool);

  /// @notice Enables a fee amount with the given tickDistance
  /// @dev Fee amounts may never be removed once enabled
  /// @param swapFeeUnits The fee amount to enable, in fee units
  /// @param tickDistance The distance between ticks to be enforced for all pools created with the given fee amount
  function enableSwapFee(uint24 swapFeeUnits, int24 tickDistance) external;

  /// @notice Updates the address which can update the fee configuration
  /// @dev Must be called by the current configMaster
  function updateConfigMaster(address) external;

  /// @notice Updates the vesting period
  /// @dev Must be called by the current configMaster
  function updateVestingPeriod(uint32) external;

  /// @notice Updates the address receiving government fees and fee quantity
  /// @dev Only configMaster is able to perform the update
  /// @param feeTo Address to receive government fees collected from pools
  /// @param governmentFeeUnits Fee amount, in fee units,
  /// to be collected out of the fee charged for a pool swap
  function updateFeeConfiguration(address feeTo, uint24 governmentFeeUnits) external;

  /// @notice Enables the whitelisting feature
  /// @dev Only configMaster is able to perform the update
  function enableWhitelist() external;

  /// @notice Disables the whitelisting feature
  /// @dev Only configMaster is able to perform the update
  function disableWhitelist() external;
}


// File contracts/Staking/Variants/FraxUnifiedFarm_ERC20_KyberSwapElasticV2.sol





contract FraxUnifiedFarm_ERC20_KyberSwapElasticV2 is FraxUnifiedFarm_ERC20 {

    // Need to seed a starting token to use both as a basis for fraxPerLPToken
    // as well as getting ticks, etc
    uint256 public seed_token_id; 

    // For KS-FT pricing
    ComboOracle_KyberSwapElasticV2 public KSE_ComboOracleV2;
    IKyberFactory public immutable kyber_factory = IKyberFactory(0xC7a590291e07B9fe9E64b86c58fD8fC764308C4A);

    constructor (
        address _owner, 
        address[] memory _rewardTokens,
        address[] memory _rewardManagers,
        uint256[] memory _rewardRates,
        address[] memory _gaugeControllers,
        address[] memory _rewardDistributors,
        address _kse_combo_oracle,
        address _stakingToken,
        uint256 _seed_token_id
    ) 
    FraxUnifiedFarm_ERC20(_owner , _rewardTokens, _rewardManagers, _rewardRates, _gaugeControllers, _rewardDistributors, _stakingToken)
    {
        // COMMENTED OUT SO COMPILER DOESNT COMPLAIN. UNCOMMENT WHEN DEPLOYING
        stakingToken = IKyberSwapFarmingToken(_stakingToken);
        frax_is_token0 = false; // Doesn't really matter here

        seed_token_id = _seed_token_id;
        KSE_ComboOracleV2 = ComboOracle_KyberSwapElasticV2(_kse_combo_oracle);
    }

    function setSeedTokenID(uint256 _seed_token_id) public onlyByOwnGov {
        seed_token_id = _seed_token_id;
    }

    function setKyberSwapElasticComboOracle(address _kse_combo_oracle_address) public onlyByOwnGov {
        KSE_ComboOracleV2 = ComboOracle_KyberSwapElasticV2(_kse_combo_oracle_address);
    }


    function fraxPerLPToken() public view override returns (uint256 frax_per_lp_token) {
        // COMMENTED OUT SO COMPILER DOESNT COMPLAIN. UNCOMMENT WHEN DEPLOYING

        // KyberSwap Elastic KyberSwapFarmingToken (KS-FT)
        // ============================================
        {
            // Fetch liquidity info from the seed token id
            // ComboOracle_KyberSwapElasticV2.NFTBasicInfo memory nft_basic_info = KSE_ComboOracleV2.getNFTBasicInfo(seed_token_id);
            ComboOracle_KyberSwapElasticV2.NFTValueInfo memory nft_value_info = KSE_ComboOracleV2.getNFTValueInfo(seed_token_id);

            // Assume half of the liquidity is FRAX or FRAX-related, even if it is not.
            frax_per_lp_token = (nft_value_info.pool_tvl_usd * MULTIPLIER_PRECISION) / (stakingToken.totalSupply() * 2);
        }
    }
}