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// SPDX-License-Identifier: BUSL-1.1

pragma solidity =0.8.4;

import "./VolmexProtocol.sol";
import "../library/VolmexSafeERC20.sol";

/**
 * @title Protocol Contract with Precision
 * @author volmex.finance [[email protected]]
 *
 * This protocol is used for decimal values less than 18.
 */
contract VolmexProtocolWithPrecision is VolmexProtocol {
    using VolmexSafeERC20 for IERC20Modified;

    // This is the ratio of standard ERC20 tokens decimals by custom token decimals
    // Calculation for USDC: 10^18 / 10^6 = 10^12
    // Where 10^18 represent precision of volatility token decimals and 10^6 represent USDC (collateral) decimals
    uint256 public precisionRatio;

    /**
     * @dev Makes the protocol `active` at deployment
     * @dev Sets the `minimumCollateralQty`
     * @dev Makes the collateral token as `collateral`
     * @dev Assign position tokens
     * @dev Sets the `volatilityCapRatio`
     *
     * @param _collateralTokenAddress is address of collateral token typecasted to IERC20Modified
     * @param _volatilityToken is address of volatility index token typecasted to IERC20Modified
     * @param _inverseVolatilityToken is address of inverse volatility index token typecasted to IERC20Modified
     * @param _minimumCollateralQty is the minimum qty of tokens need to mint 0.1 volatility and inverse volatility tokens
     * @param _volatilityCapRatio is the cap for volatility
     * @param _ratio Ratio of standard ERC20 token decimals (18) by custom token
     */
    function initializePrecision(
        IERC20Modified _collateralTokenAddress,
        IERC20Modified _volatilityToken,
        IERC20Modified _inverseVolatilityToken,
        uint256 _minimumCollateralQty,
        uint256 _volatilityCapRatio,
        uint256 _ratio
    ) external initializer {
        initialize(
            _collateralTokenAddress,
            _volatilityToken,
            _inverseVolatilityToken,
            _minimumCollateralQty,
            _volatilityCapRatio
        );

        precisionRatio = _ratio;
    }

    /**
     * @notice Add collateral to the protocol and mint the position tokens
     * @param _collateralQty Quantity of the collateral being deposited
     *
     * @dev Added precision ratio to calculate the effective collateral qty
     *
     * NOTE: Collateral quantity should be at least required minimum collateral quantity
     *
     * Calculation: Get the quantity for position token
     * Mint the position token for `msg.sender`
     *
     */
    function collateralize(uint256 _collateralQty)
        external
        virtual
        override
        onlyActive
        onlyNotSettled
    {
        require(
            _collateralQty >= minimumCollateralQty,
            "Volmex: CollateralQty > minimum qty required"
        );

        // Mechanism to calculate the collateral qty using the increase in balance
        // of protocol contract to counter USDT's fee mechanism, which can be enabled in future
        uint256 initialProtocolBalance = collateral.balanceOf(address(this));
        collateral.safeTransferFrom(msg.sender, address(this), _collateralQty);
        uint256 finalProtocolBalance = collateral.balanceOf(address(this));

        _collateralQty = finalProtocolBalance - initialProtocolBalance;

        uint256 fee;
        if (issuanceFees > 0) {
            fee = (_collateralQty * issuanceFees) / 10000;
            _collateralQty = _collateralQty - fee;
            accumulatedFees = accumulatedFees + fee;
        }

        uint256 effectiveCollateralQty = _collateralQty * precisionRatio;

        uint256 qtyToBeMinted = effectiveCollateralQty / volatilityCapRatio;

        volatilityToken.mint(msg.sender, qtyToBeMinted);
        inverseVolatilityToken.mint(msg.sender, qtyToBeMinted);

        emit Collateralized(msg.sender, _collateralQty, qtyToBeMinted, fee);
    }

    function _redeem(
        uint256 _collateralQtyRedeemed,
        uint256 _volatilityIndexTokenQty,
        uint256 _inverseVolatilityIndexTokenQty
    ) internal virtual override {
        require(
            _collateralQtyRedeemed > precisionRatio,
            "Volmex: Collateral qty is less"
        );

        uint256 effectiveCollateralQty = _collateralQtyRedeemed /
            precisionRatio;

        uint256 fee;
        if (redeemFees > 0) {
            fee =
                (_collateralQtyRedeemed * redeemFees) /
                (precisionRatio * 10000);
            effectiveCollateralQty = effectiveCollateralQty - fee;
            accumulatedFees = accumulatedFees + fee;
        }

        volatilityToken.burn(msg.sender, _volatilityIndexTokenQty);
        inverseVolatilityToken.burn(
            msg.sender,
            _inverseVolatilityIndexTokenQty
        );

        collateral.safeTransfer(msg.sender, effectiveCollateralQty);

        emit Redeemed(
            msg.sender,
            effectiveCollateralQty,
            _volatilityIndexTokenQty,
            _inverseVolatilityIndexTokenQty,
            fee
        );
    }
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity =0.8.4;

import "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/security/ReentrancyGuardUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";

import "../interfaces/IERC20Modified.sol";
import "../library/VolmexSafeERC20.sol";

/**
 * @title Protocol Contract
 * @author volmex.finance [[email protected]]
 */
contract VolmexProtocol is
    Initializable,
    OwnableUpgradeable,
    ReentrancyGuardUpgradeable
{
    using VolmexSafeERC20 for IERC20Modified;

    event ToggleActivated(bool isActive);
    event UpdatedVolatilityToken(
        address indexed positionToken,
        bool isVolatilityIndexToken
    );
    event UpdatedFees(uint256 issuanceFees, uint256 redeemFees);
    event UpdatedMinimumCollateral(uint256 newMinimumCollateralQty);
    event ClaimedFees(uint256 fees);
    event ToggledVolatilityTokenPause(bool isPause);
    event Settled(uint256 settlementPrice);
    event Collateralized(
        address indexed sender,
        uint256 collateralLock,
        uint256 positionTokensMinted,
        uint256 fees
    );
    event Redeemed(
        address indexed sender,
        uint256 collateralReleased,
        uint256 volatilityIndexTokenBurned,
        uint256 inverseVolatilityIndexTokenBurned,
        uint256 fees
    );

    // Has the value of minimum collateral qty required
    uint256 public minimumCollateralQty;

    // Has the boolean state of protocol
    bool public active;

    // Has the boolean state of protocol settlement
    bool public isSettled;

    // Volatility tokens
    IERC20Modified public volatilityToken;
    IERC20Modified public inverseVolatilityToken;

    // Only ERC20 standard functions are used by the collateral defined here.
    // Address of the acceptable collateral token.
    IERC20Modified public collateral;

    // Used to calculate collateralize fee
    uint256 public issuanceFees;

    // Used to calculate redeem fee
    uint256 public redeemFees;

    // Total fee amount for call of collateralize and redeem
    uint256 public accumulatedFees;

    // Percentage value is upto two decimal places, so we're dividing it by 10000
    // Set the max fee as 5%, i.e. 500/10000.
    uint256 constant MAX_FEE = 500;

    // No need to add 18 decimals, because they are already considered in respective token qty arguments.
    uint256 public volatilityCapRatio;

    // This is the price of volatility index, ranges from 0 to volatilityCapRatio,
    // and the inverse can be calculated by subtracting volatilityCapRatio by settlementPrice.
    uint256 public settlementPrice;

    /**
     * @notice Used to check contract is active
     */
    modifier onlyActive() {
        require(active, "Volmex: Protocol not active");
        _;
    }

    /**
     * @notice Used to check contract is not settled
     */
    modifier onlyNotSettled() {
        require(!isSettled, "Volmex: Protocol settled");
        _;
    }

    /**
     * @notice Used to check contract is settled
     */
    modifier onlySettled() {
        require(isSettled, "Volmex: Protocol not settled");
        _;
    }

    /**
     * @dev Makes the protocol `active` at deployment
     * @dev Sets the `minimumCollateralQty`
     * @dev Makes the collateral token as `collateral`
     * @dev Assign position tokens
     * @dev Sets the `volatilityCapRatio`
     *
     * @param _collateralTokenAddress is address of collateral token typecasted to IERC20Modified
     * @param _volatilityToken is address of volatility index token typecasted to IERC20Modified
     * @param _inverseVolatilityToken is address of inverse volatility index token typecasted to IERC20Modified
     * @param _minimumCollateralQty is the minimum qty of tokens need to mint 0.1 volatility and inverse volatility tokens
     * @param _volatilityCapRatio is the cap for volatility
     */
    function initialize(
        IERC20Modified _collateralTokenAddress,
        IERC20Modified _volatilityToken,
        IERC20Modified _inverseVolatilityToken,
        uint256 _minimumCollateralQty,
        uint256 _volatilityCapRatio
    ) public initializer {
        __Ownable_init();
        __ReentrancyGuard_init();

        require(
            _minimumCollateralQty > 0,
            "Volmex: Minimum collateral quantity should be greater than 0"
        );

        active = true;
        minimumCollateralQty = _minimumCollateralQty;
        collateral = _collateralTokenAddress;
        volatilityToken = _volatilityToken;
        inverseVolatilityToken = _inverseVolatilityToken;
        volatilityCapRatio = _volatilityCapRatio;
    }

    /**
     * @notice Toggles the active variable. Restricted to only the owner of the contract.
     */
    function toggleActive() external virtual onlyOwner {
        active = !active;
        emit ToggleActivated(active);
    }

    /**
     * @notice Update the `minimumCollateralQty`
     * @param _newMinimumCollQty Provides the new minimum collateral quantity
     */
    function updateMinimumCollQty(uint256 _newMinimumCollQty)
        external
        virtual
        onlyOwner
    {
        require(
            _newMinimumCollQty > 0,
            "Volmex: Minimum collateral quantity should be greater than 0"
        );
        minimumCollateralQty = _newMinimumCollQty;
        emit UpdatedMinimumCollateral(_newMinimumCollQty);
    }

    /**
     * @notice Update the {Volatility Token}
     * @param _positionToken Address of the new position token
     * @param _isVolatilityIndexToken Type of the position token, { VolatilityIndexToken: true, InverseVolatilityIndexToken: false }
     */
    function updateVolatilityToken(
        address _positionToken,
        bool _isVolatilityIndexToken
    ) external virtual onlyOwner {
        _isVolatilityIndexToken
            ? volatilityToken = IERC20Modified(_positionToken)
            : inverseVolatilityToken = IERC20Modified(_positionToken);
        emit UpdatedVolatilityToken(_positionToken, _isVolatilityIndexToken);
    }

    /**
     * @notice Add collateral to the protocol and mint the position tokens
     * @param _collateralQty Quantity of the collateral being deposited
     *
     * NOTE: Collateral quantity should be at least required minimum collateral quantity
     *
     * Calculation: Get the quantity for position token
     * Mint the position token for `msg.sender`
     *
     */
    function collateralize(uint256 _collateralQty)
        external
        virtual
        onlyActive
        onlyNotSettled
    {
        require(
            _collateralQty >= minimumCollateralQty,
            "Volmex: CollateralQty > minimum qty required"
        );

        // Mechanism to calculate the collateral qty using the increase in balance
        // of protocol contract to counter USDT's fee mechanism, which can be enabled in future
        uint256 initialProtocolBalance = collateral.balanceOf(address(this));
        collateral.safeTransferFrom(msg.sender, address(this), _collateralQty);
        uint256 finalProtocolBalance = collateral.balanceOf(address(this));

        _collateralQty = finalProtocolBalance - initialProtocolBalance;

        uint256 fee;
        if (issuanceFees > 0) {
            fee = (_collateralQty * issuanceFees) / 10000;
            _collateralQty = _collateralQty - fee;
            accumulatedFees = accumulatedFees + fee;
        }

        uint256 qtyToBeMinted = _collateralQty / volatilityCapRatio;

        volatilityToken.mint(msg.sender, qtyToBeMinted);
        inverseVolatilityToken.mint(msg.sender, qtyToBeMinted);

        emit Collateralized(msg.sender, _collateralQty, qtyToBeMinted, fee);
    }

    /**
     * @notice Redeem the collateral from the protocol by providing the position token
     *
     * @param _positionTokenQty Quantity of the position token that the user is surrendering
     *
     * Amount of collateral is `_positionTokenQty` by the volatilityCapRatio.
     * Burn the position token
     *
     * Safely transfer the collateral to `msg.sender`
     */
    function redeem(uint256 _positionTokenQty)
        external
        virtual
        onlyActive
        onlyNotSettled
    {
        uint256 collQtyToBeRedeemed = _positionTokenQty * volatilityCapRatio;

        _redeem(collQtyToBeRedeemed, _positionTokenQty, _positionTokenQty);
    }

    /**
     * @notice Redeem the collateral from the protocol after settlement
     *
     * @param _volatilityIndexTokenQty Quantity of the volatility index token that the user is surrendering
     * @param _inverseVolatilityIndexTokenQty Quantity of the inverse volatility index token that the user is surrendering
     *
     * Amount of collateral is `_volatilityIndexTokenQty` by the settlementPrice and `_inverseVolatilityIndexTokenQty`
     * by volatilityCapRatio - settlementPrice
     * Burn the position token
     *
     * Safely transfer the collateral to `msg.sender`
     */
    function redeemSettled(
        uint256 _volatilityIndexTokenQty,
        uint256 _inverseVolatilityIndexTokenQty
    ) external virtual onlyActive onlySettled {
        uint256 collQtyToBeRedeemed =
            (_volatilityIndexTokenQty * settlementPrice) +
                (_inverseVolatilityIndexTokenQty *
                    (volatilityCapRatio - settlementPrice));

        _redeem(
            collQtyToBeRedeemed,
            _volatilityIndexTokenQty,
            _inverseVolatilityIndexTokenQty
        );
    }

    /**
     * @notice Settle the contract, preventing new minting and providing individual token redemption
     *
     * @param _settlementPrice The price of the volatility index after settlement
     *
     * The inverse volatility index token at settlement is worth volatilityCapRatio - volatility index settlement price
     */
    function settle(uint256 _settlementPrice)
        external
        virtual
        onlyOwner
        onlyNotSettled
    {
        require(
            _settlementPrice <= volatilityCapRatio,
            "Volmex: _settlementPrice should be less than equal to volatilityCapRatio"
        );
        settlementPrice = _settlementPrice;
        isSettled = true;
        emit Settled(settlementPrice);
    }

    /**
     * @notice Recover tokens accidentally sent to this contract
     */
    function recoverTokens(
        address _token,
        address _toWhom,
        uint256 _howMuch
    ) external virtual nonReentrant onlyOwner {
        require(
            _token != address(collateral),
            "Volmex: Collateral token not allowed"
        );
        IERC20Modified(_token).safeTransfer(_toWhom, _howMuch);
    }

    /**
     * @notice Update the percentage of `issuanceFees` and `redeemFees`
     *
     * @param _issuanceFees Percentage of fees required to collateralize the collateral
     * @param _redeemFees Percentage of fees required to redeem the collateral
     */
    function updateFees(uint256 _issuanceFees, uint256 _redeemFees)
        external
        virtual
        onlyOwner
    {
        require(
            _issuanceFees <= MAX_FEE && _redeemFees <= MAX_FEE,
            "Volmex: issue/redeem fees should be less than MAX_FEE"
        );

        issuanceFees = _issuanceFees;
        redeemFees = _redeemFees;

        emit UpdatedFees(_issuanceFees, _redeemFees);
    }

    /**
     * @notice Safely transfer the accumulated fees to owner
     */
    function claimAccumulatedFees() external virtual onlyOwner {
        uint256 claimedAccumulatedFees = accumulatedFees;
        delete accumulatedFees;

        collateral.safeTransfer(owner(), claimedAccumulatedFees);

        emit ClaimedFees(claimedAccumulatedFees);
    }

    /**
     * @notice Pause/unpause volmex position token.
     *
     * @param _isPause Boolean value to pause or unpause the position token { true = pause, false = unpause }
     */
    function togglePause(bool _isPause) external virtual onlyOwner {
        if (_isPause) {
            volatilityToken.pause();
            inverseVolatilityToken.pause();
        } else {
            volatilityToken.unpause();
            inverseVolatilityToken.unpause();
        }

        emit ToggledVolatilityTokenPause(_isPause);
    }

    function _redeem(
        uint256 _collateralQtyRedeemed,
        uint256 _volatilityIndexTokenQty,
        uint256 _inverseVolatilityIndexTokenQty
    ) internal virtual {
        uint256 fee;
        if (redeemFees > 0) {
            fee = (_collateralQtyRedeemed * redeemFees) / 10000;
            _collateralQtyRedeemed = _collateralQtyRedeemed - fee;
            accumulatedFees = accumulatedFees + fee;
        }

        volatilityToken.burn(msg.sender, _volatilityIndexTokenQty);
        inverseVolatilityToken.burn(
            msg.sender,
            _inverseVolatilityIndexTokenQty
        );

        collateral.safeTransfer(msg.sender, _collateralQtyRedeemed);

        emit Redeemed(
            msg.sender,
            _collateralQtyRedeemed,
            _volatilityIndexTokenQty,
            _inverseVolatilityIndexTokenQty,
            fee
        );
    }
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity =0.8.4;

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

/**
 * @title VolmexSafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using VolmexSafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 *
 * NOTE: Inspired from Openzeppelin's SafeERC20 library.
 */
library VolmexSafeERC20 {
    function safeTransfer(IERC20 token, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IERC20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(IERC20 token, address spender, uint256 value) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        // solhint-disable-next-line max-line-length
        require((value == 0) || (token.allowance(address(this), spender) == 0),
            "VolmexSafeERC20: approve from non-zero to non-zero allowance"
        );
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
    }

    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 newAllowance = token.allowance(address(this), spender) + value;
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        unchecked {
            uint256 oldAllowance = token.allowance(address(this), spender);
            require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
            uint256 newAllowance = oldAllowance - value;
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
        }
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        bytes memory returndata = functionCall(address(token), data, "VolmexSafeERC20: low-level call failed");
        if (returndata.length > 0) { // Return data is optional
            // solhint-disable-next-line max-line-length
            require(abi.decode(returndata, (bool)), "VolmexSafeERC20: ERC20 operation did not succeed");
        }
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     */
    function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
        require(isContract(target), "VolmexSafeERC20: call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.call{ value: 0 }(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @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;
    }

    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);
            }
        }
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "../utils/ContextUpgradeable.sol";
import "../proxy/utils/Initializable.sol";
/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {
    address private _owner;

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

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    function __Ownable_init() internal initializer {
        __Context_init_unchained();
        __Ownable_init_unchained();
    }

    function __Ownable_init_unchained() internal initializer {
        address msgSender = _msgSender();
        _owner = msgSender;
        emit OwnershipTransferred(address(0), msgSender);
    }

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

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        emit OwnershipTransferred(_owner, address(0));
        _owner = address(0);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
    uint256[49] private __gap;
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;
import "../proxy/utils/Initializable.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 ReentrancyGuardUpgradeable is Initializable {
    // 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;

    function __ReentrancyGuard_init() internal initializer {
        __ReentrancyGuard_init_unchained();
    }

    function __ReentrancyGuard_init_unchained() internal initializer {
        _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;
    }
    uint256[49] private __gap;
}

// SPDX-License-Identifier: MIT

// solhint-disable-next-line compiler-version
pragma solidity ^0.8.0;

/**
 * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
 * behind a proxy. Since a proxied contract can't have a constructor, it's common to move constructor logic to an
 * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
 * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
 *
 * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
 * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
 *
 * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
 * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
 */
abstract contract Initializable {

    /**
     * @dev Indicates that the contract has been initialized.
     */
    bool private _initialized;

    /**
     * @dev Indicates that the contract is in the process of being initialized.
     */
    bool private _initializing;

    /**
     * @dev Modifier to protect an initializer function from being invoked twice.
     */
    modifier initializer() {
        require(_initializing || !_initialized, "Initializable: contract is already initialized");

        bool isTopLevelCall = !_initializing;
        if (isTopLevelCall) {
            _initializing = true;
            _initialized = true;
        }

        _;

        if (isTopLevelCall) {
            _initializing = false;
        }
    }
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity =0.8.4;

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

/**
 * @dev Modified Interface of the OpenZeppelin's IERC20 extra functions to add features in position token.
 */
interface IERC20Modified is IERC20 {
    function symbol() external view returns (string memory);

    function mint(address _toWhom, uint256 amount) external;

    function burn(address _whose, uint256 amount) external;

    function grantRole(bytes32 role, address account) external;

    function renounceRole(bytes32 role, address account) external;

    function pause() external;

    function unpause() external;
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;
import "../proxy/utils/Initializable.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 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 ContextUpgradeable is Initializable {
    function __Context_init() internal initializer {
        __Context_init_unchained();
    }

    function __Context_init_unchained() internal initializer {
    }
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
    uint256[50] private __gap;
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `sender` to `recipient` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);

    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);
}

{
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "abi"
      ]
    }
  },
  "metadata": {
    "useLiteralContent": true
  },
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

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IERC20Modified","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_collateralQty","type":"uint256"}],"name":"collateralize","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"contract IERC20Modified","name":"_collateralTokenAddress","type":"address"},{"internalType":"contract IERC20Modified","name":"_volatilityToken","type":"address"},{"internalType":"contract IERC20Modified","name":"_inverseVolatilityToken","type":"address"},{"internalType":"uint256","name":"_minimumCollateralQty","type":"uint256"},{"internalType":"uint256","name":"_volatilityCapRatio","type":"uint256"}],"name":"initialize","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"contract IERC20Modified","name":"_collateralTokenAddress","type":"address"},{"internalType":"contract IERC20Modified","name":"_volatilityToken","type":"address"},{"internalType":"contract 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IERC20Modified","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"isSettled","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"issuanceFees","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"minimumCollateralQty","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"precisionRatio","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_token","type":"address"},{"internalType":"address","name":"_toWhom","type":"address"},{"internalType":"uint256","name":"_howMuch","type":"uint256"}],"name":"recoverTokens","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_positionTokenQty","type":"uint256"}],"name":"redeem","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"redeemFees","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_volatilityIndexTokenQty","type":"uint256"},{"internalType":"uint256","name":"_inverseVolatilityIndexTokenQty","type":"uint256"}],"name":"redeemSettled","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_settlementPrice","type":"uint256"}],"name":"settle","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"settlementPrice","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"toggleActive","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bool","name":"_isPause","type":"bool"}],"name":"togglePause","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_issuanceFees","type":"uint256"},{"internalType":"uint256","name":"_redeemFees","type":"uint256"}],"name":"updateFees","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_newMinimumCollQty","type":"uint256"}],"name":"updateMinimumCollQty","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_positionToken","type":"address"},{"internalType":"bool","name":"_isVolatilityIndexToken","type":"bool"}],"name":"updateVolatilityToken","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"volatilityCapRatio","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"volatilityToken","outputs":[{"internalType":"contract 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