// File: @chainlink/contracts/src/v0.8/interfaces/AggregatorV3Interface.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface AggregatorV3Interface {
  function decimals() external view returns (uint8);

  function description() external view returns (string memory);

  function version() external view returns (uint256);

  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: @openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (proxy/utils/Initializable.sol)

pragma solidity ^0.8.2;

import "../../utils/AddressUpgradeable.sol";

/**
 * @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 proxied contracts do not make use of 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.
 *
 * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be
 * reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in
 * case an upgrade adds a module that needs to be initialized.
 *
 * For example:
 *
 * [.hljs-theme-light.nopadding]
 * ```solidity
 * contract MyToken is ERC20Upgradeable {
 *     function initialize() initializer public {
 *         __ERC20_init("MyToken", "MTK");
 *     }
 * }
 *
 * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {
 *     function initializeV2() reinitializer(2) public {
 *         __ERC20Permit_init("MyToken");
 *     }
 * }
 * ```
 *
 * 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.
 *
 * [CAUTION]
 * ====
 * Avoid leaving a contract uninitialized.
 *
 * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
 * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke
 * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:
 *
 * [.hljs-theme-light.nopadding]
 * ```
 * /// @custom:oz-upgrades-unsafe-allow constructor
 * constructor() {
 *     _disableInitializers();
 * }
 * ```
 * ====
 */
abstract contract Initializable {
    /**
     * @dev Indicates that the contract has been initialized.
     * @custom:oz-retyped-from bool
     */
    uint8 private _initialized;

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

    /**
     * @dev Triggered when the contract has been initialized or reinitialized.
     */
    event Initialized(uint8 version);

    /**
     * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,
     * `onlyInitializing` functions can be used to initialize parent contracts.
     *
     * Similar to `reinitializer(1)`, except that functions marked with `initializer` can be nested in the context of a
     * constructor.
     *
     * Emits an {Initialized} event.
     */
    modifier initializer() {
        bool isTopLevelCall = !_initializing;
        require(
            (isTopLevelCall && _initialized < 1) || (!AddressUpgradeable.isContract(address(this)) && _initialized == 1),
            "Initializable: contract is already initialized"
        );
        _initialized = 1;
        if (isTopLevelCall) {
            _initializing = true;
        }
        _;
        if (isTopLevelCall) {
            _initializing = false;
            emit Initialized(1);
        }
    }

    /**
     * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the
     * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be
     * used to initialize parent contracts.
     *
     * A reinitializer may be used after the original initialization step. This is essential to configure modules that
     * are added through upgrades and that require initialization.
     *
     * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer`
     * cannot be nested. If one is invoked in the context of another, execution will revert.
     *
     * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in
     * a contract, executing them in the right order is up to the developer or operator.
     *
     * WARNING: setting the version to 255 will prevent any future reinitialization.
     *
     * Emits an {Initialized} event.
     */
    modifier reinitializer(uint8 version) {
        require(!_initializing && _initialized < version, "Initializable: contract is already initialized");
        _initialized = version;
        _initializing = true;
        _;
        _initializing = false;
        emit Initialized(version);
    }

    /**
     * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the
     * {initializer} and {reinitializer} modifiers, directly or indirectly.
     */
    modifier onlyInitializing() {
        require(_initializing, "Initializable: contract is not initializing");
        _;
    }

    /**
     * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.
     * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized
     * to any version. It is recommended to use this to lock implementation contracts that are designed to be called
     * through proxies.
     *
     * Emits an {Initialized} event the first time it is successfully executed.
     */
    function _disableInitializers() internal virtual {
        require(!_initializing, "Initializable: contract is initializing");
        if (_initialized != type(uint8).max) {
            _initialized = type(uint8).max;
            emit Initialized(type(uint8).max);
        }
    }

    /**
     * @dev Returns the highest version that has been initialized. See {reinitializer}.
     */
    function _getInitializedVersion() internal view returns (uint8) {
        return _initialized;
    }

    /**
     * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}.
     */
    function _isInitializing() internal view returns (bool) {
        return _initializing;
    }
}

// File: @openzeppelin/contracts-upgradeable/utils/AddressUpgradeable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @dev Collection of functions related to the address type
 */
library AddressUpgradeable {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     *
     * Furthermore, `isContract` will also return true if the target contract within
     * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
     * which only has an effect at the end of a transaction.
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

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

    /**
     * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason or using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    function _revert(bytes memory returndata, string memory errorMessage) private pure {
        // Look for revert reason and bubble it up if present
        if (returndata.length > 0) {
            // The easiest way to bubble the revert reason is using memory via assembly
            /// @solidity memory-safe-assembly
            assembly {
                let returndata_size := mload(returndata)
                revert(add(32, returndata), returndata_size)
            }
        } else {
            revert(errorMessage);
        }
    }
}

// File: @openzeppelin/contracts/utils/math/SafeCast.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SafeCast.sol)
// This file was procedurally generated from scripts/generate/templates/SafeCast.js.

pragma solidity ^0.8.0;

/**
 * @dev Wrappers over Solidity's uintXX/intXX casting operators with added overflow
 * checks.
 *
 * Downcasting from uint256/int256 in Solidity does not revert on overflow. This can
 * easily result in undesired exploitation or bugs, since developers usually
 * assume that overflows raise errors. `SafeCast` restores this intuition by
 * reverting the transaction when such 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.
 *
 * Can be combined with {SafeMath} and {SignedSafeMath} to extend it to smaller types, by performing
 * all math on `uint256` and `int256` and then downcasting.
 */
library SafeCast {
    /**
     * @dev Returns the downcasted uint248 from uint256, reverting on
     * overflow (when the input is greater than largest uint248).
     *
     * Counterpart to Solidity's `uint248` operator.
     *
     * Requirements:
     *
     * - input must fit into 248 bits
     *
     * _Available since v4.7._
     */
    function toUint248(uint256 value) internal pure returns (uint248) {
        require(value <= type(uint248).max, "SafeCast: value doesn't fit in 248 bits");
        return uint248(value);
    }

    /**
     * @dev Returns the downcasted uint240 from uint256, reverting on
     * overflow (when the input is greater than largest uint240).
     *
     * Counterpart to Solidity's `uint240` operator.
     *
     * Requirements:
     *
     * - input must fit into 240 bits
     *
     * _Available since v4.7._
     */
    function toUint240(uint256 value) internal pure returns (uint240) {
        require(value <= type(uint240).max, "SafeCast: value doesn't fit in 240 bits");
        return uint240(value);
    }

    /**
     * @dev Returns the downcasted uint232 from uint256, reverting on
     * overflow (when the input is greater than largest uint232).
     *
     * Counterpart to Solidity's `uint232` operator.
     *
     * Requirements:
     *
     * - input must fit into 232 bits
     *
     * _Available since v4.7._
     */
    function toUint232(uint256 value) internal pure returns (uint232) {
        require(value <= type(uint232).max, "SafeCast: value doesn't fit in 232 bits");
        return uint232(value);
    }

    /**
     * @dev Returns the downcasted uint224 from uint256, reverting on
     * overflow (when the input is greater than largest uint224).
     *
     * Counterpart to Solidity's `uint224` operator.
     *
     * Requirements:
     *
     * - input must fit into 224 bits
     *
     * _Available since v4.2._
     */
    function toUint224(uint256 value) internal pure returns (uint224) {
        require(value <= type(uint224).max, "SafeCast: value doesn't fit in 224 bits");
        return uint224(value);
    }

    /**
     * @dev Returns the downcasted uint216 from uint256, reverting on
     * overflow (when the input is greater than largest uint216).
     *
     * Counterpart to Solidity's `uint216` operator.
     *
     * Requirements:
     *
     * - input must fit into 216 bits
     *
     * _Available since v4.7._
     */
    function toUint216(uint256 value) internal pure returns (uint216) {
        require(value <= type(uint216).max, "SafeCast: value doesn't fit in 216 bits");
        return uint216(value);
    }

    /**
     * @dev Returns the downcasted uint208 from uint256, reverting on
     * overflow (when the input is greater than largest uint208).
     *
     * Counterpart to Solidity's `uint208` operator.
     *
     * Requirements:
     *
     * - input must fit into 208 bits
     *
     * _Available since v4.7._
     */
    function toUint208(uint256 value) internal pure returns (uint208) {
        require(value <= type(uint208).max, "SafeCast: value doesn't fit in 208 bits");
        return uint208(value);
    }

    /**
     * @dev Returns the downcasted uint200 from uint256, reverting on
     * overflow (when the input is greater than largest uint200).
     *
     * Counterpart to Solidity's `uint200` operator.
     *
     * Requirements:
     *
     * - input must fit into 200 bits
     *
     * _Available since v4.7._
     */
    function toUint200(uint256 value) internal pure returns (uint200) {
        require(value <= type(uint200).max, "SafeCast: value doesn't fit in 200 bits");
        return uint200(value);
    }

    /**
     * @dev Returns the downcasted uint192 from uint256, reverting on
     * overflow (when the input is greater than largest uint192).
     *
     * Counterpart to Solidity's `uint192` operator.
     *
     * Requirements:
     *
     * - input must fit into 192 bits
     *
     * _Available since v4.7._
     */
    function toUint192(uint256 value) internal pure returns (uint192) {
        require(value <= type(uint192).max, "SafeCast: value doesn't fit in 192 bits");
        return uint192(value);
    }

    /**
     * @dev Returns the downcasted uint184 from uint256, reverting on
     * overflow (when the input is greater than largest uint184).
     *
     * Counterpart to Solidity's `uint184` operator.
     *
     * Requirements:
     *
     * - input must fit into 184 bits
     *
     * _Available since v4.7._
     */
    function toUint184(uint256 value) internal pure returns (uint184) {
        require(value <= type(uint184).max, "SafeCast: value doesn't fit in 184 bits");
        return uint184(value);
    }

    /**
     * @dev Returns the downcasted uint176 from uint256, reverting on
     * overflow (when the input is greater than largest uint176).
     *
     * Counterpart to Solidity's `uint176` operator.
     *
     * Requirements:
     *
     * - input must fit into 176 bits
     *
     * _Available since v4.7._
     */
    function toUint176(uint256 value) internal pure returns (uint176) {
        require(value <= type(uint176).max, "SafeCast: value doesn't fit in 176 bits");
        return uint176(value);
    }

    /**
     * @dev Returns the downcasted uint168 from uint256, reverting on
     * overflow (when the input is greater than largest uint168).
     *
     * Counterpart to Solidity's `uint168` operator.
     *
     * Requirements:
     *
     * - input must fit into 168 bits
     *
     * _Available since v4.7._
     */
    function toUint168(uint256 value) internal pure returns (uint168) {
        require(value <= type(uint168).max, "SafeCast: value doesn't fit in 168 bits");
        return uint168(value);
    }

    /**
     * @dev Returns the downcasted uint160 from uint256, reverting on
     * overflow (when the input is greater than largest uint160).
     *
     * Counterpart to Solidity's `uint160` operator.
     *
     * Requirements:
     *
     * - input must fit into 160 bits
     *
     * _Available since v4.7._
     */
    function toUint160(uint256 value) internal pure returns (uint160) {
        require(value <= type(uint160).max, "SafeCast: value doesn't fit in 160 bits");
        return uint160(value);
    }

    /**
     * @dev Returns the downcasted uint152 from uint256, reverting on
     * overflow (when the input is greater than largest uint152).
     *
     * Counterpart to Solidity's `uint152` operator.
     *
     * Requirements:
     *
     * - input must fit into 152 bits
     *
     * _Available since v4.7._
     */
    function toUint152(uint256 value) internal pure returns (uint152) {
        require(value <= type(uint152).max, "SafeCast: value doesn't fit in 152 bits");
        return uint152(value);
    }

    /**
     * @dev Returns the downcasted uint144 from uint256, reverting on
     * overflow (when the input is greater than largest uint144).
     *
     * Counterpart to Solidity's `uint144` operator.
     *
     * Requirements:
     *
     * - input must fit into 144 bits
     *
     * _Available since v4.7._
     */
    function toUint144(uint256 value) internal pure returns (uint144) {
        require(value <= type(uint144).max, "SafeCast: value doesn't fit in 144 bits");
        return uint144(value);
    }

    /**
     * @dev Returns the downcasted uint136 from uint256, reverting on
     * overflow (when the input is greater than largest uint136).
     *
     * Counterpart to Solidity's `uint136` operator.
     *
     * Requirements:
     *
     * - input must fit into 136 bits
     *
     * _Available since v4.7._
     */
    function toUint136(uint256 value) internal pure returns (uint136) {
        require(value <= type(uint136).max, "SafeCast: value doesn't fit in 136 bits");
        return uint136(value);
    }

    /**
     * @dev Returns the downcasted uint128 from uint256, reverting on
     * overflow (when the input is greater than largest uint128).
     *
     * Counterpart to Solidity's `uint128` operator.
     *
     * Requirements:
     *
     * - input must fit into 128 bits
     *
     * _Available since v2.5._
     */
    function toUint128(uint256 value) internal pure returns (uint128) {
        require(value <= type(uint128).max, "SafeCast: value doesn't fit in 128 bits");
        return uint128(value);
    }

    /**
     * @dev Returns the downcasted uint120 from uint256, reverting on
     * overflow (when the input is greater than largest uint120).
     *
     * Counterpart to Solidity's `uint120` operator.
     *
     * Requirements:
     *
     * - input must fit into 120 bits
     *
     * _Available since v4.7._
     */
    function toUint120(uint256 value) internal pure returns (uint120) {
        require(value <= type(uint120).max, "SafeCast: value doesn't fit in 120 bits");
        return uint120(value);
    }

    /**
     * @dev Returns the downcasted uint112 from uint256, reverting on
     * overflow (when the input is greater than largest uint112).
     *
     * Counterpart to Solidity's `uint112` operator.
     *
     * Requirements:
     *
     * - input must fit into 112 bits
     *
     * _Available since v4.7._
     */
    function toUint112(uint256 value) internal pure returns (uint112) {
        require(value <= type(uint112).max, "SafeCast: value doesn't fit in 112 bits");
        return uint112(value);
    }

    /**
     * @dev Returns the downcasted uint104 from uint256, reverting on
     * overflow (when the input is greater than largest uint104).
     *
     * Counterpart to Solidity's `uint104` operator.
     *
     * Requirements:
     *
     * - input must fit into 104 bits
     *
     * _Available since v4.7._
     */
    function toUint104(uint256 value) internal pure returns (uint104) {
        require(value <= type(uint104).max, "SafeCast: value doesn't fit in 104 bits");
        return uint104(value);
    }

    /**
     * @dev Returns the downcasted uint96 from uint256, reverting on
     * overflow (when the input is greater than largest uint96).
     *
     * Counterpart to Solidity's `uint96` operator.
     *
     * Requirements:
     *
     * - input must fit into 96 bits
     *
     * _Available since v4.2._
     */
    function toUint96(uint256 value) internal pure returns (uint96) {
        require(value <= type(uint96).max, "SafeCast: value doesn't fit in 96 bits");
        return uint96(value);
    }

    /**
     * @dev Returns the downcasted uint88 from uint256, reverting on
     * overflow (when the input is greater than largest uint88).
     *
     * Counterpart to Solidity's `uint88` operator.
     *
     * Requirements:
     *
     * - input must fit into 88 bits
     *
     * _Available since v4.7._
     */
    function toUint88(uint256 value) internal pure returns (uint88) {
        require(value <= type(uint88).max, "SafeCast: value doesn't fit in 88 bits");
        return uint88(value);
    }

    /**
     * @dev Returns the downcasted uint80 from uint256, reverting on
     * overflow (when the input is greater than largest uint80).
     *
     * Counterpart to Solidity's `uint80` operator.
     *
     * Requirements:
     *
     * - input must fit into 80 bits
     *
     * _Available since v4.7._
     */
    function toUint80(uint256 value) internal pure returns (uint80) {
        require(value <= type(uint80).max, "SafeCast: value doesn't fit in 80 bits");
        return uint80(value);
    }

    /**
     * @dev Returns the downcasted uint72 from uint256, reverting on
     * overflow (when the input is greater than largest uint72).
     *
     * Counterpart to Solidity's `uint72` operator.
     *
     * Requirements:
     *
     * - input must fit into 72 bits
     *
     * _Available since v4.7._
     */
    function toUint72(uint256 value) internal pure returns (uint72) {
        require(value <= type(uint72).max, "SafeCast: value doesn't fit in 72 bits");
        return uint72(value);
    }

    /**
     * @dev Returns the downcasted uint64 from uint256, reverting on
     * overflow (when the input is greater than largest uint64).
     *
     * Counterpart to Solidity's `uint64` operator.
     *
     * Requirements:
     *
     * - input must fit into 64 bits
     *
     * _Available since v2.5._
     */
    function toUint64(uint256 value) internal pure returns (uint64) {
        require(value <= type(uint64).max, "SafeCast: value doesn't fit in 64 bits");
        return uint64(value);
    }

    /**
     * @dev Returns the downcasted uint56 from uint256, reverting on
     * overflow (when the input is greater than largest uint56).
     *
     * Counterpart to Solidity's `uint56` operator.
     *
     * Requirements:
     *
     * - input must fit into 56 bits
     *
     * _Available since v4.7._
     */
    function toUint56(uint256 value) internal pure returns (uint56) {
        require(value <= type(uint56).max, "SafeCast: value doesn't fit in 56 bits");
        return uint56(value);
    }

    /**
     * @dev Returns the downcasted uint48 from uint256, reverting on
     * overflow (when the input is greater than largest uint48).
     *
     * Counterpart to Solidity's `uint48` operator.
     *
     * Requirements:
     *
     * - input must fit into 48 bits
     *
     * _Available since v4.7._
     */
    function toUint48(uint256 value) internal pure returns (uint48) {
        require(value <= type(uint48).max, "SafeCast: value doesn't fit in 48 bits");
        return uint48(value);
    }

    /**
     * @dev Returns the downcasted uint40 from uint256, reverting on
     * overflow (when the input is greater than largest uint40).
     *
     * Counterpart to Solidity's `uint40` operator.
     *
     * Requirements:
     *
     * - input must fit into 40 bits
     *
     * _Available since v4.7._
     */
    function toUint40(uint256 value) internal pure returns (uint40) {
        require(value <= type(uint40).max, "SafeCast: value doesn't fit in 40 bits");
        return uint40(value);
    }

    /**
     * @dev Returns the downcasted uint32 from uint256, reverting on
     * overflow (when the input is greater than largest uint32).
     *
     * Counterpart to Solidity's `uint32` operator.
     *
     * Requirements:
     *
     * - input must fit into 32 bits
     *
     * _Available since v2.5._
     */
    function toUint32(uint256 value) internal pure returns (uint32) {
        require(value <= type(uint32).max, "SafeCast: value doesn't fit in 32 bits");
        return uint32(value);
    }

    /**
     * @dev Returns the downcasted uint24 from uint256, reverting on
     * overflow (when the input is greater than largest uint24).
     *
     * Counterpart to Solidity's `uint24` operator.
     *
     * Requirements:
     *
     * - input must fit into 24 bits
     *
     * _Available since v4.7._
     */
    function toUint24(uint256 value) internal pure returns (uint24) {
        require(value <= type(uint24).max, "SafeCast: value doesn't fit in 24 bits");
        return uint24(value);
    }

    /**
     * @dev Returns the downcasted uint16 from uint256, reverting on
     * overflow (when the input is greater than largest uint16).
     *
     * Counterpart to Solidity's `uint16` operator.
     *
     * Requirements:
     *
     * - input must fit into 16 bits
     *
     * _Available since v2.5._
     */
    function toUint16(uint256 value) internal pure returns (uint16) {
        require(value <= type(uint16).max, "SafeCast: value doesn't fit in 16 bits");
        return uint16(value);
    }

    /**
     * @dev Returns the downcasted uint8 from uint256, reverting on
     * overflow (when the input is greater than largest uint8).
     *
     * Counterpart to Solidity's `uint8` operator.
     *
     * Requirements:
     *
     * - input must fit into 8 bits
     *
     * _Available since v2.5._
     */
    function toUint8(uint256 value) internal pure returns (uint8) {
        require(value <= type(uint8).max, "SafeCast: value doesn't fit in 8 bits");
        return uint8(value);
    }

    /**
     * @dev Converts a signed int256 into an unsigned uint256.
     *
     * Requirements:
     *
     * - input must be greater than or equal to 0.
     *
     * _Available since v3.0._
     */
    function toUint256(int256 value) internal pure returns (uint256) {
        require(value >= 0, "SafeCast: value must be positive");
        return uint256(value);
    }

    /**
     * @dev Returns the downcasted int248 from int256, reverting on
     * overflow (when the input is less than smallest int248 or
     * greater than largest int248).
     *
     * Counterpart to Solidity's `int248` operator.
     *
     * Requirements:
     *
     * - input must fit into 248 bits
     *
     * _Available since v4.7._
     */
    function toInt248(int256 value) internal pure returns (int248 downcasted) {
        downcasted = int248(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 248 bits");
    }

    /**
     * @dev Returns the downcasted int240 from int256, reverting on
     * overflow (when the input is less than smallest int240 or
     * greater than largest int240).
     *
     * Counterpart to Solidity's `int240` operator.
     *
     * Requirements:
     *
     * - input must fit into 240 bits
     *
     * _Available since v4.7._
     */
    function toInt240(int256 value) internal pure returns (int240 downcasted) {
        downcasted = int240(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 240 bits");
    }

    /**
     * @dev Returns the downcasted int232 from int256, reverting on
     * overflow (when the input is less than smallest int232 or
     * greater than largest int232).
     *
     * Counterpart to Solidity's `int232` operator.
     *
     * Requirements:
     *
     * - input must fit into 232 bits
     *
     * _Available since v4.7._
     */
    function toInt232(int256 value) internal pure returns (int232 downcasted) {
        downcasted = int232(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 232 bits");
    }

    /**
     * @dev Returns the downcasted int224 from int256, reverting on
     * overflow (when the input is less than smallest int224 or
     * greater than largest int224).
     *
     * Counterpart to Solidity's `int224` operator.
     *
     * Requirements:
     *
     * - input must fit into 224 bits
     *
     * _Available since v4.7._
     */
    function toInt224(int256 value) internal pure returns (int224 downcasted) {
        downcasted = int224(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 224 bits");
    }

    /**
     * @dev Returns the downcasted int216 from int256, reverting on
     * overflow (when the input is less than smallest int216 or
     * greater than largest int216).
     *
     * Counterpart to Solidity's `int216` operator.
     *
     * Requirements:
     *
     * - input must fit into 216 bits
     *
     * _Available since v4.7._
     */
    function toInt216(int256 value) internal pure returns (int216 downcasted) {
        downcasted = int216(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 216 bits");
    }

    /**
     * @dev Returns the downcasted int208 from int256, reverting on
     * overflow (when the input is less than smallest int208 or
     * greater than largest int208).
     *
     * Counterpart to Solidity's `int208` operator.
     *
     * Requirements:
     *
     * - input must fit into 208 bits
     *
     * _Available since v4.7._
     */
    function toInt208(int256 value) internal pure returns (int208 downcasted) {
        downcasted = int208(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 208 bits");
    }

    /**
     * @dev Returns the downcasted int200 from int256, reverting on
     * overflow (when the input is less than smallest int200 or
     * greater than largest int200).
     *
     * Counterpart to Solidity's `int200` operator.
     *
     * Requirements:
     *
     * - input must fit into 200 bits
     *
     * _Available since v4.7._
     */
    function toInt200(int256 value) internal pure returns (int200 downcasted) {
        downcasted = int200(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 200 bits");
    }

    /**
     * @dev Returns the downcasted int192 from int256, reverting on
     * overflow (when the input is less than smallest int192 or
     * greater than largest int192).
     *
     * Counterpart to Solidity's `int192` operator.
     *
     * Requirements:
     *
     * - input must fit into 192 bits
     *
     * _Available since v4.7._
     */
    function toInt192(int256 value) internal pure returns (int192 downcasted) {
        downcasted = int192(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 192 bits");
    }

    /**
     * @dev Returns the downcasted int184 from int256, reverting on
     * overflow (when the input is less than smallest int184 or
     * greater than largest int184).
     *
     * Counterpart to Solidity's `int184` operator.
     *
     * Requirements:
     *
     * - input must fit into 184 bits
     *
     * _Available since v4.7._
     */
    function toInt184(int256 value) internal pure returns (int184 downcasted) {
        downcasted = int184(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 184 bits");
    }

    /**
     * @dev Returns the downcasted int176 from int256, reverting on
     * overflow (when the input is less than smallest int176 or
     * greater than largest int176).
     *
     * Counterpart to Solidity's `int176` operator.
     *
     * Requirements:
     *
     * - input must fit into 176 bits
     *
     * _Available since v4.7._
     */
    function toInt176(int256 value) internal pure returns (int176 downcasted) {
        downcasted = int176(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 176 bits");
    }

    /**
     * @dev Returns the downcasted int168 from int256, reverting on
     * overflow (when the input is less than smallest int168 or
     * greater than largest int168).
     *
     * Counterpart to Solidity's `int168` operator.
     *
     * Requirements:
     *
     * - input must fit into 168 bits
     *
     * _Available since v4.7._
     */
    function toInt168(int256 value) internal pure returns (int168 downcasted) {
        downcasted = int168(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 168 bits");
    }

    /**
     * @dev Returns the downcasted int160 from int256, reverting on
     * overflow (when the input is less than smallest int160 or
     * greater than largest int160).
     *
     * Counterpart to Solidity's `int160` operator.
     *
     * Requirements:
     *
     * - input must fit into 160 bits
     *
     * _Available since v4.7._
     */
    function toInt160(int256 value) internal pure returns (int160 downcasted) {
        downcasted = int160(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 160 bits");
    }

    /**
     * @dev Returns the downcasted int152 from int256, reverting on
     * overflow (when the input is less than smallest int152 or
     * greater than largest int152).
     *
     * Counterpart to Solidity's `int152` operator.
     *
     * Requirements:
     *
     * - input must fit into 152 bits
     *
     * _Available since v4.7._
     */
    function toInt152(int256 value) internal pure returns (int152 downcasted) {
        downcasted = int152(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 152 bits");
    }

    /**
     * @dev Returns the downcasted int144 from int256, reverting on
     * overflow (when the input is less than smallest int144 or
     * greater than largest int144).
     *
     * Counterpart to Solidity's `int144` operator.
     *
     * Requirements:
     *
     * - input must fit into 144 bits
     *
     * _Available since v4.7._
     */
    function toInt144(int256 value) internal pure returns (int144 downcasted) {
        downcasted = int144(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 144 bits");
    }

    /**
     * @dev Returns the downcasted int136 from int256, reverting on
     * overflow (when the input is less than smallest int136 or
     * greater than largest int136).
     *
     * Counterpart to Solidity's `int136` operator.
     *
     * Requirements:
     *
     * - input must fit into 136 bits
     *
     * _Available since v4.7._
     */
    function toInt136(int256 value) internal pure returns (int136 downcasted) {
        downcasted = int136(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 136 bits");
    }

    /**
     * @dev Returns the downcasted int128 from int256, reverting on
     * overflow (when the input is less than smallest int128 or
     * greater than largest int128).
     *
     * Counterpart to Solidity's `int128` operator.
     *
     * Requirements:
     *
     * - input must fit into 128 bits
     *
     * _Available since v3.1._
     */
    function toInt128(int256 value) internal pure returns (int128 downcasted) {
        downcasted = int128(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 128 bits");
    }

    /**
     * @dev Returns the downcasted int120 from int256, reverting on
     * overflow (when the input is less than smallest int120 or
     * greater than largest int120).
     *
     * Counterpart to Solidity's `int120` operator.
     *
     * Requirements:
     *
     * - input must fit into 120 bits
     *
     * _Available since v4.7._
     */
    function toInt120(int256 value) internal pure returns (int120 downcasted) {
        downcasted = int120(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 120 bits");
    }

    /**
     * @dev Returns the downcasted int112 from int256, reverting on
     * overflow (when the input is less than smallest int112 or
     * greater than largest int112).
     *
     * Counterpart to Solidity's `int112` operator.
     *
     * Requirements:
     *
     * - input must fit into 112 bits
     *
     * _Available since v4.7._
     */
    function toInt112(int256 value) internal pure returns (int112 downcasted) {
        downcasted = int112(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 112 bits");
    }

    /**
     * @dev Returns the downcasted int104 from int256, reverting on
     * overflow (when the input is less than smallest int104 or
     * greater than largest int104).
     *
     * Counterpart to Solidity's `int104` operator.
     *
     * Requirements:
     *
     * - input must fit into 104 bits
     *
     * _Available since v4.7._
     */
    function toInt104(int256 value) internal pure returns (int104 downcasted) {
        downcasted = int104(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 104 bits");
    }

    /**
     * @dev Returns the downcasted int96 from int256, reverting on
     * overflow (when the input is less than smallest int96 or
     * greater than largest int96).
     *
     * Counterpart to Solidity's `int96` operator.
     *
     * Requirements:
     *
     * - input must fit into 96 bits
     *
     * _Available since v4.7._
     */
    function toInt96(int256 value) internal pure returns (int96 downcasted) {
        downcasted = int96(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 96 bits");
    }

    /**
     * @dev Returns the downcasted int88 from int256, reverting on
     * overflow (when the input is less than smallest int88 or
     * greater than largest int88).
     *
     * Counterpart to Solidity's `int88` operator.
     *
     * Requirements:
     *
     * - input must fit into 88 bits
     *
     * _Available since v4.7._
     */
    function toInt88(int256 value) internal pure returns (int88 downcasted) {
        downcasted = int88(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 88 bits");
    }

    /**
     * @dev Returns the downcasted int80 from int256, reverting on
     * overflow (when the input is less than smallest int80 or
     * greater than largest int80).
     *
     * Counterpart to Solidity's `int80` operator.
     *
     * Requirements:
     *
     * - input must fit into 80 bits
     *
     * _Available since v4.7._
     */
    function toInt80(int256 value) internal pure returns (int80 downcasted) {
        downcasted = int80(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 80 bits");
    }

    /**
     * @dev Returns the downcasted int72 from int256, reverting on
     * overflow (when the input is less than smallest int72 or
     * greater than largest int72).
     *
     * Counterpart to Solidity's `int72` operator.
     *
     * Requirements:
     *
     * - input must fit into 72 bits
     *
     * _Available since v4.7._
     */
    function toInt72(int256 value) internal pure returns (int72 downcasted) {
        downcasted = int72(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 72 bits");
    }

    /**
     * @dev Returns the downcasted int64 from int256, reverting on
     * overflow (when the input is less than smallest int64 or
     * greater than largest int64).
     *
     * Counterpart to Solidity's `int64` operator.
     *
     * Requirements:
     *
     * - input must fit into 64 bits
     *
     * _Available since v3.1._
     */
    function toInt64(int256 value) internal pure returns (int64 downcasted) {
        downcasted = int64(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 64 bits");
    }

    /**
     * @dev Returns the downcasted int56 from int256, reverting on
     * overflow (when the input is less than smallest int56 or
     * greater than largest int56).
     *
     * Counterpart to Solidity's `int56` operator.
     *
     * Requirements:
     *
     * - input must fit into 56 bits
     *
     * _Available since v4.7._
     */
    function toInt56(int256 value) internal pure returns (int56 downcasted) {
        downcasted = int56(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 56 bits");
    }

    /**
     * @dev Returns the downcasted int48 from int256, reverting on
     * overflow (when the input is less than smallest int48 or
     * greater than largest int48).
     *
     * Counterpart to Solidity's `int48` operator.
     *
     * Requirements:
     *
     * - input must fit into 48 bits
     *
     * _Available since v4.7._
     */
    function toInt48(int256 value) internal pure returns (int48 downcasted) {
        downcasted = int48(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 48 bits");
    }

    /**
     * @dev Returns the downcasted int40 from int256, reverting on
     * overflow (when the input is less than smallest int40 or
     * greater than largest int40).
     *
     * Counterpart to Solidity's `int40` operator.
     *
     * Requirements:
     *
     * - input must fit into 40 bits
     *
     * _Available since v4.7._
     */
    function toInt40(int256 value) internal pure returns (int40 downcasted) {
        downcasted = int40(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 40 bits");
    }

    /**
     * @dev Returns the downcasted int32 from int256, reverting on
     * overflow (when the input is less than smallest int32 or
     * greater than largest int32).
     *
     * Counterpart to Solidity's `int32` operator.
     *
     * Requirements:
     *
     * - input must fit into 32 bits
     *
     * _Available since v3.1._
     */
    function toInt32(int256 value) internal pure returns (int32 downcasted) {
        downcasted = int32(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 32 bits");
    }

    /**
     * @dev Returns the downcasted int24 from int256, reverting on
     * overflow (when the input is less than smallest int24 or
     * greater than largest int24).
     *
     * Counterpart to Solidity's `int24` operator.
     *
     * Requirements:
     *
     * - input must fit into 24 bits
     *
     * _Available since v4.7._
     */
    function toInt24(int256 value) internal pure returns (int24 downcasted) {
        downcasted = int24(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 24 bits");
    }

    /**
     * @dev Returns the downcasted int16 from int256, reverting on
     * overflow (when the input is less than smallest int16 or
     * greater than largest int16).
     *
     * Counterpart to Solidity's `int16` operator.
     *
     * Requirements:
     *
     * - input must fit into 16 bits
     *
     * _Available since v3.1._
     */
    function toInt16(int256 value) internal pure returns (int16 downcasted) {
        downcasted = int16(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 16 bits");
    }

    /**
     * @dev Returns the downcasted int8 from int256, reverting on
     * overflow (when the input is less than smallest int8 or
     * greater than largest int8).
     *
     * Counterpart to Solidity's `int8` operator.
     *
     * Requirements:
     *
     * - input must fit into 8 bits
     *
     * _Available since v3.1._
     */
    function toInt8(int256 value) internal pure returns (int8 downcasted) {
        downcasted = int8(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 8 bits");
    }

    /**
     * @dev Converts an unsigned uint256 into a signed int256.
     *
     * Requirements:
     *
     * - input must be less than or equal to maxInt256.
     *
     * _Available since v3.0._
     */
    function toInt256(uint256 value) internal pure returns (int256) {
        // Note: Unsafe cast below is okay because `type(int256).max` is guaranteed to be positive
        require(value <= uint256(type(int256).max), "SafeCast: value doesn't fit in an int256");
        return int256(value);
    }
}

// File: @openzeppelin/contracts/utils/math/SafeMath.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/math/SafeMath.sol)

pragma solidity ^0.8.0;

// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.

/**
 * @dev Wrappers over Solidity's arithmetic operations.
 *
 * NOTE: `SafeMath` is generally not needed starting with Solidity 0.8, since the compiler
 * now has built in overflow checking.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            uint256 c = a + b;
            if (c < a) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b > a) return (false, 0);
            return (true, a - b);
        }
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            // 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 (true, 0);
            uint256 c = a * b;
            if (c / a != b) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a / b);
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a % b);
        }
    }

    /**
     * @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) {
        return a + b;
    }

    /**
     * @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 a - b;
    }

    /**
     * @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) {
        return a * b;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator.
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting 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 a % b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        unchecked {
            require(b <= a, errorMessage);
            return a - b;
        }
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting 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.
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a / b;
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * 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, string memory errorMessage) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a % b;
        }
    }
}

// File: @redstone-finance/evm-connector/contracts/core/CalldataExtractor.sol



// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.4;

import "@openzeppelin/contracts/utils/math/SafeMath.sol";

import "./RedstoneConstants.sol";

/**
 * @title The base contract with the main logic of data extraction from calldata
 * @author The Redstone Oracles team
 * @dev This contract was created to reuse the same logic in the RedstoneConsumerBase
 * and the ProxyConnector contracts
 */
contract CalldataExtractor is RedstoneConstants {
  using SafeMath for uint256;

  error DataPackageTimestampMustNotBeZero();
  error DataPackageTimestampsMustBeEqual();
  error RedstonePayloadMustHaveAtLeastOneDataPackage();

  function extractTimestampsAndAssertAllAreEqual() public pure returns (uint256 extractedTimestamp) {
    uint256 calldataNegativeOffset = _extractByteSizeOfUnsignedMetadata();
    uint256 dataPackagesCount = _extractDataPackagesCountFromCalldata(calldataNegativeOffset);

    if (dataPackagesCount == 0) {
      revert RedstonePayloadMustHaveAtLeastOneDataPackage();
    }

    calldataNegativeOffset += DATA_PACKAGES_COUNT_BS;
    for (uint256 dataPackageIndex = 0; dataPackageIndex < dataPackagesCount; dataPackageIndex++) {
      uint256 dataPackageByteSize = _getDataPackageByteSize(calldataNegativeOffset);

      // Extracting timestamp for the current data package
      uint48 dataPackageTimestamp; // uint48, because timestamp uses 6 bytes
      uint256 timestampNegativeOffset = (calldataNegativeOffset + TIMESTAMP_NEGATIVE_OFFSET_IN_DATA_PACKAGE_WITH_STANDARD_SLOT_BS);
      uint256 timestampOffset = msg.data.length - timestampNegativeOffset;
      assembly {
        dataPackageTimestamp := calldataload(timestampOffset)
      }

      if (dataPackageTimestamp == 0) {
        revert DataPackageTimestampMustNotBeZero();
      }

      if (extractedTimestamp == 0) {
        extractedTimestamp = dataPackageTimestamp;
      } else if (dataPackageTimestamp != extractedTimestamp) {
        revert DataPackageTimestampsMustBeEqual();
      }

      calldataNegativeOffset += dataPackageByteSize;
    }
  }

  function _getDataPackageByteSize(uint256 calldataNegativeOffset) internal pure returns (uint256) {
    (
      uint256 dataPointsCount,
      uint256 eachDataPointValueByteSize
    ) = _extractDataPointsDetailsForDataPackage(calldataNegativeOffset);

    return
      dataPointsCount *
      (DATA_POINT_SYMBOL_BS + eachDataPointValueByteSize) +
      DATA_PACKAGE_WITHOUT_DATA_POINTS_BS;
  }

  function _extractByteSizeOfUnsignedMetadata() internal pure returns (uint256) {
    // Checking if the calldata ends with the RedStone marker
    bool hasValidRedstoneMarker;
    assembly {
      let calldataLast32Bytes := calldataload(sub(calldatasize(), STANDARD_SLOT_BS))
      hasValidRedstoneMarker := eq(
        REDSTONE_MARKER_MASK,
        and(calldataLast32Bytes, REDSTONE_MARKER_MASK)
      )
    }
    if (!hasValidRedstoneMarker) {
      revert CalldataMustHaveValidPayload();
    }

    // Using uint24, because unsigned metadata byte size number has 3 bytes
    uint24 unsignedMetadataByteSize;
    if (REDSTONE_MARKER_BS_PLUS_STANDARD_SLOT_BS > msg.data.length) {
      revert CalldataOverOrUnderFlow();
    }
    assembly {
      unsignedMetadataByteSize := calldataload(
        sub(calldatasize(), REDSTONE_MARKER_BS_PLUS_STANDARD_SLOT_BS)
      )
    }
    uint256 calldataNegativeOffset = unsignedMetadataByteSize
      + UNSIGNED_METADATA_BYTE_SIZE_BS
      + REDSTONE_MARKER_BS;
    if (calldataNegativeOffset + DATA_PACKAGES_COUNT_BS > msg.data.length) {
      revert IncorrectUnsignedMetadataSize();
    }
    return calldataNegativeOffset;
  }

  // We return uint16, because unsigned metadata byte size number has 2 bytes
  function _extractDataPackagesCountFromCalldata(uint256 calldataNegativeOffset)
    internal
    pure
    returns (uint16 dataPackagesCount)
  {
    uint256 calldataNegativeOffsetWithStandardSlot = calldataNegativeOffset + STANDARD_SLOT_BS;
    if (calldataNegativeOffsetWithStandardSlot > msg.data.length) {
      revert CalldataOverOrUnderFlow();
    }
    assembly {
      dataPackagesCount := calldataload(
        sub(calldatasize(), calldataNegativeOffsetWithStandardSlot)
      )
    }
    return dataPackagesCount;
  }

  function _extractDataPointValueAndDataFeedId(
    uint256 calldataNegativeOffsetForDataPackage,
    uint256 defaultDataPointValueByteSize,
    uint256 dataPointIndex
  ) internal pure virtual returns (bytes32 dataPointDataFeedId, uint256 dataPointValue) {
    uint256 negativeOffsetToDataPoints = calldataNegativeOffsetForDataPackage + DATA_PACKAGE_WITHOUT_DATA_POINTS_BS;
    uint256 dataPointNegativeOffset = negativeOffsetToDataPoints.add(
      (1 + dataPointIndex).mul((defaultDataPointValueByteSize + DATA_POINT_SYMBOL_BS))
    );
    uint256 dataPointCalldataOffset = msg.data.length.sub(dataPointNegativeOffset);
    assembly {
      dataPointDataFeedId := calldataload(dataPointCalldataOffset)
      dataPointValue := calldataload(add(dataPointCalldataOffset, DATA_POINT_SYMBOL_BS))
    }
  }

  function _extractDataPointsDetailsForDataPackage(uint256 calldataNegativeOffsetForDataPackage)
    internal
    pure
    returns (uint256 dataPointsCount, uint256 eachDataPointValueByteSize)
  {
    // Using uint24, because data points count byte size number has 3 bytes
    uint24 dataPointsCount_;

    // Using uint32, because data point value byte size has 4 bytes
    uint32 eachDataPointValueByteSize_;

    // Extract data points count
    uint256 negativeCalldataOffset = calldataNegativeOffsetForDataPackage + SIG_BS;
    uint256 calldataOffset = msg.data.length.sub(negativeCalldataOffset + STANDARD_SLOT_BS);
    assembly {
      dataPointsCount_ := calldataload(calldataOffset)
    }

    // Extract each data point value size
    calldataOffset = calldataOffset.sub(DATA_POINTS_COUNT_BS);
    assembly {
      eachDataPointValueByteSize_ := calldataload(calldataOffset)
    }

    // Prepare returned values
    dataPointsCount = dataPointsCount_;
    eachDataPointValueByteSize = eachDataPointValueByteSize_;
  }
}

// File: @redstone-finance/evm-connector/contracts/core/RedstoneConstants.sol



// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.4;

/**
 * @title The base contract with helpful constants
 * @author The Redstone Oracles team
 * @dev It mainly contains redstone-related values, which improve readability
 * of other contracts (e.g. CalldataExtractor and RedstoneConsumerBase)
 */
contract RedstoneConstants {
  // === Abbreviations ===
  // BS - Bytes size
  // PTR - Pointer (memory location)
  // SIG - Signature

  // Solidity and YUL constants
  uint256 internal constant STANDARD_SLOT_BS = 32;
  uint256 internal constant FREE_MEMORY_PTR = 0x40;
  uint256 internal constant BYTES_ARR_LEN_VAR_BS = 32;
  uint256 internal constant FUNCTION_SIGNATURE_BS = 4;
  uint256 internal constant REVERT_MSG_OFFSET = 68; // Revert message structure described here: https://ethereum.stackexchange.com/a/66173/106364
  uint256 internal constant STRING_ERR_MESSAGE_MASK = 0x08c379a000000000000000000000000000000000000000000000000000000000;

  // RedStone protocol consts
  uint256 internal constant SIG_BS = 65;
  uint256 internal constant TIMESTAMP_BS = 6;
  uint256 internal constant DATA_PACKAGES_COUNT_BS = 2;
  uint256 internal constant DATA_POINTS_COUNT_BS = 3;
  uint256 internal constant DATA_POINT_VALUE_BYTE_SIZE_BS = 4;
  uint256 internal constant DATA_POINT_SYMBOL_BS = 32;
  uint256 internal constant DEFAULT_DATA_POINT_VALUE_BS = 32;
  uint256 internal constant UNSIGNED_METADATA_BYTE_SIZE_BS = 3;
  uint256 internal constant REDSTONE_MARKER_BS = 9; // byte size of 0x000002ed57011e0000
  uint256 internal constant REDSTONE_MARKER_MASK = 0x0000000000000000000000000000000000000000000000000002ed57011e0000;

  // Derived values (based on consts)
  uint256 internal constant TIMESTAMP_NEGATIVE_OFFSET_IN_DATA_PACKAGE_WITH_STANDARD_SLOT_BS = 104; // SIG_BS + DATA_POINTS_COUNT_BS + DATA_POINT_VALUE_BYTE_SIZE_BS + STANDARD_SLOT_BS
  uint256 internal constant DATA_PACKAGE_WITHOUT_DATA_POINTS_BS = 78; // DATA_POINT_VALUE_BYTE_SIZE_BS + TIMESTAMP_BS + DATA_POINTS_COUNT_BS + SIG_BS
  uint256 internal constant DATA_PACKAGE_WITHOUT_DATA_POINTS_AND_SIG_BS = 13; // DATA_POINT_VALUE_BYTE_SIZE_BS + TIMESTAMP_BS + DATA_POINTS_COUNT_BS
  uint256 internal constant REDSTONE_MARKER_BS_PLUS_STANDARD_SLOT_BS = 41; // REDSTONE_MARKER_BS + STANDARD_SLOT_BS

  // Error messages
  error CalldataOverOrUnderFlow();
  error IncorrectUnsignedMetadataSize();
  error InsufficientNumberOfUniqueSigners(uint256 receivedSignersCount, uint256 requiredSignersCount);
  error EachSignerMustProvideTheSameValue();
  error EmptyCalldataPointersArr();
  error InvalidCalldataPointer();
  error CalldataMustHaveValidPayload();
  error SignerNotAuthorised(address receivedSigner);
}

// File: @redstone-finance/evm-connector/contracts/core/RedstoneConsumerBase.sol



// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.4;

import "@openzeppelin/contracts/utils/math/SafeMath.sol";

import "./RedstoneConstants.sol";
import "./RedstoneDefaultsLib.sol";
import "./CalldataExtractor.sol";
import "../libs/BitmapLib.sol";
import "../libs/SignatureLib.sol";

/**
 * @title The base contract with the main Redstone logic
 * @author The Redstone Oracles team
 * @dev Do not use this contract directly in consumer contracts, take a
 * look at `RedstoneConsumerNumericBase` and `RedstoneConsumerBytesBase` instead
 */
abstract contract RedstoneConsumerBase is CalldataExtractor {
  using SafeMath for uint256;

  error GetDataServiceIdNotImplemented();

  /* ========== VIRTUAL FUNCTIONS (MAY BE OVERRIDDEN IN CHILD CONTRACTS) ========== */

  /**
   * @dev This function must be implemented by the child consumer contract.
   * It should return dataServiceId which DataServiceWrapper will use if not provided explicitly .
   * If not overridden, value will always have to be provided explicitly in DataServiceWrapper.
   * @return dataServiceId being consumed by contract
   */
  function getDataServiceId() public view virtual returns (string memory) {
    revert GetDataServiceIdNotImplemented();
  }

  /**
   * @dev This function must be implemented by the child consumer contract.
   * It should return a unique index for a given signer address if the signer
   * is authorised, otherwise it should revert
   * @param receivedSigner The address of a signer, recovered from ECDSA signature
   * @return Unique index for a signer in the range [0..255]
   */
  function getAuthorisedSignerIndex(address receivedSigner) public view virtual returns (uint8);

  /**
   * @dev This function may be overridden by the child consumer contract.
   * It should validate the timestamp against the current time (block.timestamp)
   * It should revert with a helpful message if the timestamp is not valid
   * @param receivedTimestampMilliseconds Timestamp extracted from calldata
   */
  function validateTimestamp(uint256 receivedTimestampMilliseconds) public view virtual {
    RedstoneDefaultsLib.validateTimestamp(receivedTimestampMilliseconds);
  }

  /**
   * @dev This function should be overridden by the child consumer contract.
   * @return The minimum required value of unique authorised signers
   */
  function getUniqueSignersThreshold() public view virtual returns (uint8) {
    return 1;
  }

  /**
   * @dev This function may be overridden by the child consumer contract.
   * It should aggregate values from different signers to a single uint value.
   * By default, it calculates the median value
   * @param values An array of uint256 values from different signers
   * @return Result of the aggregation in the form of a single number
   */
  function aggregateValues(uint256[] memory values) public view virtual returns (uint256) {
    return RedstoneDefaultsLib.aggregateValues(values);
  }

  /* ========== FUNCTIONS WITH IMPLEMENTATION (CAN NOT BE OVERRIDDEN) ========== */

  /**
   * @dev This is an internal helpful function for secure extraction oracle values
   * from the tx calldata. Security is achieved by signatures verification, timestamp
   * validation, and aggregating values from different authorised signers into a
   * single numeric value. If any of the required conditions (e.g. too old timestamp or
   * insufficient number of authorised signers) do not match, the function will revert.
   *
   * Note! You should not call this function in a consumer contract. You can use
   * `getOracleNumericValuesFromTxMsg` or `getOracleNumericValueFromTxMsg` instead.
   *
   * @param dataFeedIds An array of unique data feed identifiers
   * @return An array of the extracted and verified oracle values in the same order
   * as they are requested in dataFeedIds array
   */
  function _securelyExtractOracleValuesFromTxMsg(bytes32[] memory dataFeedIds)
    internal
    view
    returns (uint256[] memory)
  {
    // Initializing helpful variables and allocating memory
    uint256[] memory uniqueSignerCountForDataFeedIds = new uint256[](dataFeedIds.length);
    uint256[] memory signersBitmapForDataFeedIds = new uint256[](dataFeedIds.length);
    uint256[][] memory valuesForDataFeeds = new uint256[][](dataFeedIds.length);
    for (uint256 i = 0; i < dataFeedIds.length; i++) {
      // The line below is commented because newly allocated arrays are filled with zeros
      // But we left it for better readability
      // signersBitmapForDataFeedIds[i] = 0; // <- setting to an empty bitmap
      valuesForDataFeeds[i] = new uint256[](getUniqueSignersThreshold());
    }

    // Extracting the number of data packages from calldata
    uint256 calldataNegativeOffset = _extractByteSizeOfUnsignedMetadata();
    uint256 dataPackagesCount = _extractDataPackagesCountFromCalldata(calldataNegativeOffset);
    calldataNegativeOffset += DATA_PACKAGES_COUNT_BS;

    // Saving current free memory pointer
    uint256 freeMemPtr;
    assembly {
      freeMemPtr := mload(FREE_MEMORY_PTR)
    }

    // Data packages extraction in a loop
    for (uint256 dataPackageIndex = 0; dataPackageIndex < dataPackagesCount; dataPackageIndex++) {
      // Extract data package details and update calldata offset
      uint256 dataPackageByteSize = _extractDataPackage(
        dataFeedIds,
        uniqueSignerCountForDataFeedIds,
        signersBitmapForDataFeedIds,
        valuesForDataFeeds,
        calldataNegativeOffset
      );
      calldataNegativeOffset += dataPackageByteSize;

      // Shifting memory pointer back to the "safe" value
      assembly {
        mstore(FREE_MEMORY_PTR, freeMemPtr)
      }
    }

    // Validating numbers of unique signers and calculating aggregated values for each dataFeedId
    return _getAggregatedValues(valuesForDataFeeds, uniqueSignerCountForDataFeedIds);
  }

  /**
   * @dev This is a private helpful function, which extracts data for a data package based
   * on the given negative calldata offset, verifies them, and in the case of successful
   * verification updates the corresponding data package values in memory
   *
   * @param dataFeedIds an array of unique data feed identifiers
   * @param uniqueSignerCountForDataFeedIds an array with the numbers of unique signers
   * for each data feed
   * @param signersBitmapForDataFeedIds an array of signer bitmaps for data feeds
   * @param valuesForDataFeeds 2-dimensional array, valuesForDataFeeds[i][j] contains
   * j-th value for the i-th data feed
   * @param calldataNegativeOffset negative calldata offset for the given data package
   *
   * @return An array of the aggregated values
   */
  function _extractDataPackage(
    bytes32[] memory dataFeedIds,
    uint256[] memory uniqueSignerCountForDataFeedIds,
    uint256[] memory signersBitmapForDataFeedIds,
    uint256[][] memory valuesForDataFeeds,
    uint256 calldataNegativeOffset
  ) private view returns (uint256) {
    uint256 signerIndex;

    (
      uint256 dataPointsCount,
      uint256 eachDataPointValueByteSize
    ) = _extractDataPointsDetailsForDataPackage(calldataNegativeOffset);

    // We use scopes to resolve problem with too deep stack
    {
      uint48 extractedTimestamp;
      address signerAddress;
      bytes32 signedHash;
      bytes memory signedMessage;
      uint256 signedMessageBytesCount;

      signedMessageBytesCount = dataPointsCount.mul(eachDataPointValueByteSize + DATA_POINT_SYMBOL_BS)
        + DATA_PACKAGE_WITHOUT_DATA_POINTS_AND_SIG_BS; //DATA_POINT_VALUE_BYTE_SIZE_BS + TIMESTAMP_BS + DATA_POINTS_COUNT_BS

      uint256 timestampCalldataOffset = msg.data.length.sub(
        calldataNegativeOffset + TIMESTAMP_NEGATIVE_OFFSET_IN_DATA_PACKAGE_WITH_STANDARD_SLOT_BS);

      uint256 signedMessageCalldataOffset = msg.data.length.sub(
        calldataNegativeOffset + SIG_BS + signedMessageBytesCount);

      assembly {
        // Extracting the signed message
        signedMessage := extractBytesFromCalldata(
          signedMessageCalldataOffset,
          signedMessageBytesCount
        )

        // Hashing the signed message
        signedHash := keccak256(add(signedMessage, BYTES_ARR_LEN_VAR_BS), signedMessageBytesCount)

        // Extracting timestamp
        extractedTimestamp := calldataload(timestampCalldataOffset)

        function initByteArray(bytesCount) -> ptr {
          ptr := mload(FREE_MEMORY_PTR)
          mstore(ptr, bytesCount)
          ptr := add(ptr, BYTES_ARR_LEN_VAR_BS)
          mstore(FREE_MEMORY_PTR, add(ptr, bytesCount))
        }

        function extractBytesFromCalldata(offset, bytesCount) -> extractedBytes {
          let extractedBytesStartPtr := initByteArray(bytesCount)
          calldatacopy(
            extractedBytesStartPtr,
            offset,
            bytesCount
          )
          extractedBytes := sub(extractedBytesStartPtr, BYTES_ARR_LEN_VAR_BS)
        }
      }

      // Validating timestamp
      validateTimestamp(extractedTimestamp);

      // Verifying the off-chain signature against on-chain hashed data
      signerAddress = SignatureLib.recoverSignerAddress(
        signedHash,
        calldataNegativeOffset + SIG_BS
      );
      signerIndex = getAuthorisedSignerIndex(signerAddress);
    }

    // Updating helpful arrays
    {
      bytes32 dataPointDataFeedId;
      uint256 dataPointValue;
      for (uint256 dataPointIndex = 0; dataPointIndex < dataPointsCount; dataPointIndex++) {
        // Extracting data feed id and value for the current data point
        (dataPointDataFeedId, dataPointValue) = _extractDataPointValueAndDataFeedId(
          calldataNegativeOffset,
          eachDataPointValueByteSize,
          dataPointIndex
        );

        for (
          uint256 dataFeedIdIndex = 0;
          dataFeedIdIndex < dataFeedIds.length;
          dataFeedIdIndex++
        ) {
          if (dataPointDataFeedId == dataFeedIds[dataFeedIdIndex]) {
            uint256 bitmapSignersForDataFeedId = signersBitmapForDataFeedIds[dataFeedIdIndex];

            if (
              !BitmapLib.getBitFromBitmap(bitmapSignersForDataFeedId, signerIndex) && /* current signer was not counted for current dataFeedId */
              uniqueSignerCountForDataFeedIds[dataFeedIdIndex] < getUniqueSignersThreshold()
            ) {
              // Increase unique signer counter
              uniqueSignerCountForDataFeedIds[dataFeedIdIndex]++;

              // Add new value
              valuesForDataFeeds[dataFeedIdIndex][
                uniqueSignerCountForDataFeedIds[dataFeedIdIndex] - 1
              ] = dataPointValue;

              // Update signers bitmap
              signersBitmapForDataFeedIds[dataFeedIdIndex] = BitmapLib.setBitInBitmap(
                bitmapSignersForDataFeedId,
                signerIndex
              );
            }

            // Breaking, as there couldn't be several indexes for the same feed ID
            break;
          }
        }
      }
    }

    // Return total data package byte size
    return
      DATA_PACKAGE_WITHOUT_DATA_POINTS_BS +
      (eachDataPointValueByteSize + DATA_POINT_SYMBOL_BS) *
      dataPointsCount;
  }

  /**
   * @dev This is a private helpful function, which aggregates values from different
   * authorised signers for the given arrays of values for each data feed
   *
   * @param valuesForDataFeeds 2-dimensional array, valuesForDataFeeds[i][j] contains
   * j-th value for the i-th data feed
   * @param uniqueSignerCountForDataFeedIds an array with the numbers of unique signers
   * for each data feed
   *
   * @return An array of the aggregated values
   */
  function _getAggregatedValues(
    uint256[][] memory valuesForDataFeeds,
    uint256[] memory uniqueSignerCountForDataFeedIds
  ) private view returns (uint256[] memory) {
    uint256[] memory aggregatedValues = new uint256[](valuesForDataFeeds.length);
    uint256 uniqueSignersThreshold = getUniqueSignersThreshold();

    for (uint256 dataFeedIndex = 0; dataFeedIndex < valuesForDataFeeds.length; dataFeedIndex++) {
      if (uniqueSignerCountForDataFeedIds[dataFeedIndex] < uniqueSignersThreshold) {
        revert InsufficientNumberOfUniqueSigners(
          uniqueSignerCountForDataFeedIds[dataFeedIndex],
          uniqueSignersThreshold);
      }
      uint256 aggregatedValueForDataFeedId = aggregateValues(valuesForDataFeeds[dataFeedIndex]);
      aggregatedValues[dataFeedIndex] = aggregatedValueForDataFeedId;
    }

    return aggregatedValues;
  }
}

// File: @redstone-finance/evm-connector/contracts/core/RedstoneConsumerNumericBase.sol



// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.4;

import "./RedstoneConsumerBase.sol";

/**
 * @title The base contract for Redstone consumers' contracts that allows to
 * securely calculate numeric redstone oracle values
 * @author The Redstone Oracles team
 * @dev This contract can extend other contracts to allow them
 * securely fetch Redstone oracle data from transactions calldata
 */
abstract contract RedstoneConsumerNumericBase is RedstoneConsumerBase {
  /**
   * @dev This function can be used in a consumer contract to securely extract an
   * oracle value for a given data feed id. Security is achieved by
   * signatures verification, timestamp validation, and aggregating values
   * from different authorised signers into a single numeric value. If any of the
   * required conditions do not match, the function will revert.
   * Note! This function expects that tx calldata contains redstone payload in the end
   * Learn more about redstone payload here: https://github.com/redstone-finance/redstone-oracles-monorepo/tree/main/packages/evm-connector#readme
   * @param dataFeedId bytes32 value that uniquely identifies the data feed
   * @return Extracted and verified numeric oracle value for the given data feed id
   */
  function getOracleNumericValueFromTxMsg(bytes32 dataFeedId)
    internal
    view
    virtual
    returns (uint256)
  {
    bytes32[] memory dataFeedIds = new bytes32[](1);
    dataFeedIds[0] = dataFeedId;
    return getOracleNumericValuesFromTxMsg(dataFeedIds)[0];
  }

  /**
   * @dev This function can be used in a consumer contract to securely extract several
   * numeric oracle values for a given array of data feed ids. Security is achieved by
   * signatures verification, timestamp validation, and aggregating values
   * from different authorised signers into a single numeric value. If any of the
   * required conditions do not match, the function will revert.
   * Note! This function expects that tx calldata contains redstone payload in the end
   * Learn more about redstone payload here: https://github.com/redstone-finance/redstone-oracles-monorepo/tree/main/packages/evm-connector#readme
   * @param dataFeedIds An array of unique data feed identifiers
   * @return An array of the extracted and verified oracle values in the same order
   * as they are requested in the dataFeedIds array
   */
  function getOracleNumericValuesFromTxMsg(bytes32[] memory dataFeedIds)
    internal
    view
    virtual
    returns (uint256[] memory)
  {
    return _securelyExtractOracleValuesFromTxMsg(dataFeedIds);
  }

  /**
   * @dev This function works similarly to the `getOracleNumericValuesFromTxMsg` with the
   * only difference that it allows to request oracle data for an array of data feeds
   * that may contain duplicates
   * 
   * @param dataFeedIdsWithDuplicates An array of data feed identifiers (duplicates are allowed)
   * @return An array of the extracted and verified oracle values in the same order
   * as they are requested in the dataFeedIdsWithDuplicates array
   */
  function getOracleNumericValuesWithDuplicatesFromTxMsg(bytes32[] memory dataFeedIdsWithDuplicates) internal view returns (uint256[] memory) {
    // Building an array without duplicates
    bytes32[] memory dataFeedIdsWithoutDuplicates = new bytes32[](dataFeedIdsWithDuplicates.length);
    bool alreadyIncluded;
    uint256 uniqueDataFeedIdsCount = 0;

    for (uint256 indexWithDup = 0; indexWithDup < dataFeedIdsWithDuplicates.length; indexWithDup++) {
      // Checking if current element is already included in `dataFeedIdsWithoutDuplicates`
      alreadyIncluded = false;
      for (uint256 indexWithoutDup = 0; indexWithoutDup < uniqueDataFeedIdsCount; indexWithoutDup++) {
        if (dataFeedIdsWithoutDuplicates[indexWithoutDup] == dataFeedIdsWithDuplicates[indexWithDup]) {
          alreadyIncluded = true;
          break;
        }
      }

      // Adding if not included
      if (!alreadyIncluded) {
        dataFeedIdsWithoutDuplicates[uniqueDataFeedIdsCount] = dataFeedIdsWithDuplicates[indexWithDup];
        uniqueDataFeedIdsCount++;
      }
    }

    // Overriding dataFeedIdsWithoutDuplicates.length
    // Equivalent to: dataFeedIdsWithoutDuplicates.length = uniqueDataFeedIdsCount;
    assembly {
      mstore(dataFeedIdsWithoutDuplicates, uniqueDataFeedIdsCount)
    }

    // Requesting oracle values (without duplicates)
    uint256[] memory valuesWithoutDuplicates = getOracleNumericValuesFromTxMsg(dataFeedIdsWithoutDuplicates);

    // Preparing result values array
    uint256[] memory valuesWithDuplicates = new uint256[](dataFeedIdsWithDuplicates.length);
    for (uint256 indexWithDup = 0; indexWithDup < dataFeedIdsWithDuplicates.length; indexWithDup++) {
      for (uint256 indexWithoutDup = 0; indexWithoutDup < dataFeedIdsWithoutDuplicates.length; indexWithoutDup++) {
        if (dataFeedIdsWithDuplicates[indexWithDup] == dataFeedIdsWithoutDuplicates[indexWithoutDup]) {
          valuesWithDuplicates[indexWithDup] = valuesWithoutDuplicates[indexWithoutDup];
          break;
        }
      }
    }

    return valuesWithDuplicates;
  }
}

// File: @redstone-finance/evm-connector/contracts/core/RedstoneDefaultsLib.sol



// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.4;

import "../libs/NumericArrayLib.sol";

/**
 * @title Default implementations of virtual redstone consumer base functions
 * @author The Redstone Oracles team
 */
library RedstoneDefaultsLib {
  uint256 constant DEFAULT_MAX_DATA_TIMESTAMP_DELAY_SECONDS = 3 minutes;
  uint256 constant DEFAULT_MAX_DATA_TIMESTAMP_AHEAD_SECONDS = 1 minutes;

  error TimestampFromTooLongFuture(uint256 receivedTimestampSeconds, uint256 blockTimestamp);
  error TimestampIsTooOld(uint256 receivedTimestampSeconds, uint256 blockTimestamp);

  function validateTimestamp(uint256 receivedTimestampMilliseconds) internal view {
    // Getting data timestamp from future seems quite unlikely
    // But we've already spent too much time with different cases
    // Where block.timestamp was less than dataPackage.timestamp.
    // Some blockchains may case this problem as well.
    // That's why we add MAX_BLOCK_TIMESTAMP_DELAY
    // and allow data "from future" but with a small delay
    uint256 receivedTimestampSeconds = receivedTimestampMilliseconds / 1000;

    if (block.timestamp < receivedTimestampSeconds) {
      if ((receivedTimestampSeconds - block.timestamp) > DEFAULT_MAX_DATA_TIMESTAMP_AHEAD_SECONDS) {
        revert TimestampFromTooLongFuture(receivedTimestampSeconds, block.timestamp);
      }
    } else if ((block.timestamp - receivedTimestampSeconds) > DEFAULT_MAX_DATA_TIMESTAMP_DELAY_SECONDS) {
      revert TimestampIsTooOld(receivedTimestampSeconds, block.timestamp);
    }
  }

  function aggregateValues(uint256[] memory values) internal pure returns (uint256) {
    return NumericArrayLib.pickMedian(values);
  }
}

// File: @redstone-finance/evm-connector/contracts/libs/BitmapLib.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.4;

library BitmapLib {
  function setBitInBitmap(uint256 bitmap, uint256 bitIndex) internal pure returns (uint256) {
    return bitmap | (1 << bitIndex);
  }

  function getBitFromBitmap(uint256 bitmap, uint256 bitIndex) internal pure returns (bool) {
    uint256 bitAtIndex = bitmap & (1 << bitIndex);
    return bitAtIndex > 0;
  }
}

// File: @redstone-finance/evm-connector/contracts/libs/NumericArrayLib.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.4;

import "@openzeppelin/contracts/utils/math/SafeMath.sol";

library NumericArrayLib {
  // This function sort array in memory using bubble sort algorithm,
  // which performs even better than quick sort for small arrays

  uint256 constant BYTES_ARR_LEN_VAR_BS = 32;
  uint256 constant UINT256_VALUE_BS = 32;

  error CanNotPickMedianOfEmptyArray();

  // This function modifies the array
  function pickMedian(uint256[] memory arr) internal pure returns (uint256) {
    if (arr.length == 0) {
      revert CanNotPickMedianOfEmptyArray();
    }
    sort(arr);
    uint256 middleIndex = arr.length / 2;
    if (arr.length % 2 == 0) {
      uint256 sum = SafeMath.add(arr[middleIndex - 1], arr[middleIndex]);
      return sum / 2;
    } else {
      return arr[middleIndex];
    }
  }

  function sort(uint256[] memory arr) internal pure {
    assembly {
      let arrLength := mload(arr)
      let valuesPtr := add(arr, BYTES_ARR_LEN_VAR_BS)
      let endPtr := add(valuesPtr, mul(arrLength, UINT256_VALUE_BS))
      for {
        let arrIPtr := valuesPtr
      } lt(arrIPtr, endPtr) {
        arrIPtr := add(arrIPtr, UINT256_VALUE_BS) // arrIPtr += 32
      } {
        for {
          let arrJPtr := valuesPtr
        } lt(arrJPtr, arrIPtr) {
          arrJPtr := add(arrJPtr, UINT256_VALUE_BS) // arrJPtr += 32
        } {
          let arrI := mload(arrIPtr)
          let arrJ := mload(arrJPtr)
          if lt(arrI, arrJ) {
            mstore(arrIPtr, arrJ)
            mstore(arrJPtr, arrI)
          }
        }
      }
    }
  }
}

// File: @redstone-finance/evm-connector/contracts/libs/SignatureLib.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.4;

library SignatureLib {
  uint256 constant ECDSA_SIG_R_BS = 32;
  uint256 constant ECDSA_SIG_S_BS = 32;

  function recoverSignerAddress(bytes32 signedHash, uint256 signatureCalldataNegativeOffset)
    internal
    pure
    returns (address)
  {
    bytes32 r;
    bytes32 s;
    uint8 v;
    assembly {
      let signatureCalldataStartPos := sub(calldatasize(), signatureCalldataNegativeOffset)
      r := calldataload(signatureCalldataStartPos)
      signatureCalldataStartPos := add(signatureCalldataStartPos, ECDSA_SIG_R_BS)
      s := calldataload(signatureCalldataStartPos)
      signatureCalldataStartPos := add(signatureCalldataStartPos, ECDSA_SIG_S_BS)
      v := byte(0, calldataload(signatureCalldataStartPos)) // last byte of the signature memory array
    }
    return ecrecover(signedHash, v, r, s);
  }
}

// File: @redstone-finance/on-chain-relayer/contracts/core/IRedstoneAdapter.sol



// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.14;

/**
 * @title Interface of RedStone adapter
 * @author The Redstone Oracles team
 */
interface IRedstoneAdapter {

  /**
   * @notice Updates values of all data feeds supported by the Adapter contract
   * @dev This function requires an attached redstone payload to the transaction calldata.
   * It also requires each data package to have exactly the same timestamp
   * @param dataPackagesTimestamp Timestamp of each signed data package in the redstone payload
   */
  function updateDataFeedsValues(uint256 dataPackagesTimestamp) external;


  /**
   * @notice Returns the latest properly reported value of the data feed
   * @param dataFeedId The identifier of the requested data feed
   * @return value The latest value of the given data feed
   */
  function getValueForDataFeed(bytes32 dataFeedId) external view returns (uint256);

  /**
   * @notice Returns the latest properly reported values for several data feeds
   * @param requestedDataFeedIds The array of identifiers for the requested feeds
   * @return values Values of the requested data feeds in the corresponding order
   */
  function getValuesForDataFeeds(bytes32[] memory requestedDataFeedIds) external view returns (uint256[] memory);

  /**
   * @notice Returns data timestamp from the latest update
   * @dev It's virtual, because its implementation can sometimes be different
   * (e.g. SinglePriceFeedAdapterWithClearing)
   * @return lastDataTimestamp Timestamp of the latest reported data packages
   */
  function getDataTimestampFromLatestUpdate() external view returns (uint256 lastDataTimestamp);

  /**
   * @notice Returns block timestamp of the latest successful update
   * @return blockTimestamp The block timestamp of the latest successful update
   */
  function getBlockTimestampFromLatestUpdate() external view returns (uint256 blockTimestamp);


  /**
   * @notice Returns timestamps of the latest successful update
   * @return dataTimestamp timestamp (usually in milliseconds) from the signed data packages
   * @return blockTimestamp timestamp of the block when the update has happened
   */
  function getTimestampsFromLatestUpdate() external view returns (uint128 dataTimestamp, uint128 blockTimestamp);

  /**
   * @notice Returns identifiers of all data feeds supported by the Adapter contract
   * @return An array of data feed identifiers
   */
  function getDataFeedIds() external view returns (bytes32[] memory);

  /**
   * @notice Returns the unique index of the given data feed
   * @param dataFeedId The data feed identifier
   * @return index The index of the data feed
   */
  function getDataFeedIndex(bytes32 dataFeedId) external view returns (uint256);

  /**
   * @notice Returns minimal required interval (usually in seconds) between subsequent updates
   * @return interval The required interval between updates
   */
  function getMinIntervalBetweenUpdates() external view returns (uint256);

  /**
   * @notice Reverts if the proposed timestamp of data packages it too old or too new
   * comparing to the block.timestamp. It also ensures that the proposed timestamp is newer
   * Then the one from the previous update
   * @param dataPackagesTimestamp The proposed timestamp (usually in milliseconds)
   */
  function validateProposedDataPackagesTimestamp(uint256 dataPackagesTimestamp) external view;

  /**
   * @notice Reverts if the updater is not authorised
   * @dev This function should revert if msg.sender is not allowed to update data feed values
   * @param updater The address of the proposed updater
   */
  function requireAuthorisedUpdater(address updater) external view;
}

// File: @redstone-finance/on-chain-relayer/contracts/core/RedstoneAdapterBase.sol



// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.14;

import {RedstoneConsumerNumericBase, RedstoneDefaultsLib} from "@redstone-finance/evm-connector/contracts/core/RedstoneConsumerNumericBase.sol";
import {IRedstoneAdapter} from "./IRedstoneAdapter.sol";

/**
 * @title Core logic of Redstone Adapter Contract
 * @author The Redstone Oracles team
 * @dev This contract is used to repeatedly push Redstone data to blockchain storage
 * More details here: https://docs.redstone.finance/docs/smart-contract-devs/get-started/redstone-classic
 *
 * Key details about the contract:
 * - Values for data feeds can be updated using the `updateDataFeedsValues` function
 * - All data feeds must be updated within a single call, partial updates are not allowed
 * - There is a configurable minimum interval between updates
 * - Updaters can be restricted by overriding `requireAuthorisedUpdater` function
 * - The contract is designed to force values validation, by default it prevents returning zero values
 * - All data packages in redstone payload must have the same timestamp,
 *    equal to `dataPackagesTimestamp` argument of the `updateDataFeedsValues` function
 * - Block timestamp abstraction - even though we call it blockTimestamp in many places,
 *    it's possible to have a custom logic here, e.g. use block number instead of a timestamp
 */
abstract contract RedstoneAdapterBase is RedstoneConsumerNumericBase, IRedstoneAdapter {
  // We don't use storage variables to avoid potential problems with upgradable contracts
  bytes32 internal constant LATEST_UPDATE_TIMESTAMPS_STORAGE_LOCATION = 0x3d01e4d77237ea0f771f1786da4d4ff757fcba6a92933aa53b1dcef2d6bd6fe2; // keccak256("RedStone.lastUpdateTimestamp");
  uint256 internal constant MIN_INTERVAL_BETWEEN_UPDATES = 3 seconds;
  uint256 internal constant BITS_COUNT_IN_16_BYTES = 128;
  uint256 internal constant MAX_NUMBER_FOR_128_BITS = 0x00000000000000000000000000000000ffffffffffffffffffffffffffffffff;

  error DataTimestampShouldBeNewerThanBefore(
    uint256 receivedDataTimestampMilliseconds,
    uint256 lastDataTimestampMilliseconds
  );

  error MinIntervalBetweenUpdatesHasNotPassedYet(
    uint256 currentBlockTimestamp,
    uint256 lastUpdateTimestamp,
    uint256 minIntervalBetweenUpdates
  );

  error DataPackageTimestampMismatch(uint256 expectedDataTimestamp, uint256 dataPackageTimestamp);

  error DataFeedValueCannotBeZero(bytes32 dataFeedId);

  error DataFeedIdNotFound(bytes32 dataFeedId);

  error DataTimestampIsTooBig(uint256 dataTimestamp);

  error BlockTimestampIsTooBig(uint256 blockTimestamp);

  /**
   * @notice Reverts if the updater is not authorised
   * @dev This function should revert if msg.sender is not allowed to update data feed values
   * @param updater The address of the proposed updater
   */
  function requireAuthorisedUpdater(address updater) public view virtual {
    // By default, anyone can update data feed values, but it can be overridden
  }

  /**
   * @notice Returns identifiers of all data feeds supported by the Adapter contract
   * @dev this function must be implemented in derived contracts
   * @return An array of data feed identifiers
   */
  function getDataFeedIds() public view virtual returns (bytes32[] memory);

  /**
   * @notice Returns the unique index of the given data feed
   * @dev This function can (and should) be overriden to reduce gas
   * costs of other functions
   * @param dataFeedId The data feed identifier
   * @return index The index of the data feed
   */
  function getDataFeedIndex(bytes32 dataFeedId) public view virtual returns (uint256) {
    bytes32[] memory dataFeedIds = getDataFeedIds();
    for (uint256 i = 0; i < dataFeedIds.length;) {
      if (dataFeedIds[i] == dataFeedId) {
        return i;
      }
      unchecked { i++; } // reduces gas costs
    }
    revert DataFeedIdNotFound(dataFeedId);
  }

  /**
   * @notice Updates values of all data feeds supported by the Adapter contract
   * @dev This function requires an attached redstone payload to the transaction calldata.
   * It also requires each data package to have exactly the same timestamp
   * @param dataPackagesTimestamp Timestamp of each signed data package in the redstone payload
   */
  function updateDataFeedsValues(uint256 dataPackagesTimestamp) public {
    requireAuthorisedUpdater(msg.sender);
    _assertMinIntervalBetweenUpdatesPassed();
    validateProposedDataPackagesTimestamp(dataPackagesTimestamp);
    _saveTimestampsOfCurrentUpdate(dataPackagesTimestamp);

    bytes32[] memory dataFeedsIdsArray = getDataFeedIds();

    // It will trigger timestamp validation for each data package
    uint256[] memory oracleValues = getOracleNumericValuesFromTxMsg(dataFeedsIdsArray);

    _validateAndUpdateDataFeedsValues(dataFeedsIdsArray, oracleValues);
  }

  /**
   * @dev Note! This function is not called directly, it's called for each data package    .
   * in redstone payload and just verifies if each data package has the same timestamp
   * as the one that was saved in the storage
   * @param receivedTimestampMilliseconds Timestamp from a data package
   */
  function validateTimestamp(uint256 receivedTimestampMilliseconds) public view virtual override {
    // It means that we are in the special view context and we can skip validation of the
    // timestamp. It can be useful for calling view functions, as they can not modify the contract
    // state to pass the timestamp validation below
    if (msg.sender == address(0)) {
      return;
    }

    uint256 expectedDataPackageTimestamp = getDataTimestampFromLatestUpdate();
    if (receivedTimestampMilliseconds != expectedDataPackageTimestamp) {
      revert DataPackageTimestampMismatch(
        expectedDataPackageTimestamp,
        receivedTimestampMilliseconds
      );
    }
  }

  /**
   * @dev This function should be implemented by the actual contract
   * and should contain the logic of values validation and reporting.
   * Usually, values reporting is based on saving them to the contract storage,
   * e.g. in PriceFeedsAdapter, but some custom implementations (e.g. GMX keeper adapter
   * or Mento Sorted Oracles adapter) may handle values updating in a different way
   * @param dataFeedIdsArray Array of the data feeds identifiers (it will always be all data feed ids)
   * @param values The reported values that should be validated and reported
   */
  function _validateAndUpdateDataFeedsValues(bytes32[] memory dataFeedIdsArray, uint256[] memory values) internal virtual;

  /**
   * @dev This function reverts if not enough time passed since the latest update
   */
  function _assertMinIntervalBetweenUpdatesPassed() private view {
    uint256 currentBlockTimestamp = getBlockTimestamp();
    uint256 blockTimestampFromLatestUpdate = getBlockTimestampFromLatestUpdate();
    uint256 minIntervalBetweenUpdates = getMinIntervalBetweenUpdates();
    if (currentBlockTimestamp < blockTimestampFromLatestUpdate + minIntervalBetweenUpdates) {
      revert MinIntervalBetweenUpdatesHasNotPassedYet(
        currentBlockTimestamp,
        blockTimestampFromLatestUpdate,
        minIntervalBetweenUpdates
      );
    }
  }

  /**
   * @notice Returns minimal required interval (usually in seconds) between subsequent updates
   * @dev You can override this function to change the required interval between udpates.
   * Please do not set it to 0, as it may open many attack vectors
   * @return interval The required interval between updates
   */
  function getMinIntervalBetweenUpdates() public view virtual returns (uint256) {
    return MIN_INTERVAL_BETWEEN_UPDATES;
  }

  /**
   * @notice Reverts if the proposed timestamp of data packages it too old or too new
   * comparing to the block.timestamp. It also ensures that the proposed timestamp is newer
   * Then the one from the previous update
   * @param dataPackagesTimestamp The proposed timestamp (usually in milliseconds)
   */
  function validateProposedDataPackagesTimestamp(uint256 dataPackagesTimestamp) public view {
    _preventUpdateWithOlderDataPackages(dataPackagesTimestamp);
    validateDataPackagesTimestampOnce(dataPackagesTimestamp);
  }


  /**
   * @notice Reverts if the proposed timestamp of data packages it too old or too new
   * comparing to the current block timestamp
   * @param dataPackagesTimestamp The proposed timestamp (usually in milliseconds)
   */
  function validateDataPackagesTimestampOnce(uint256 dataPackagesTimestamp) public view virtual {
    uint256 receivedTimestampSeconds = dataPackagesTimestamp / 1000;

    (uint256 maxDataAheadSeconds, uint256 maxDataDelaySeconds) = getAllowedTimestampDiffsInSeconds();

    uint256 blockTimestamp = getBlockTimestamp();

    if (blockTimestamp < receivedTimestampSeconds) {
      if ((receivedTimestampSeconds - blockTimestamp) > maxDataAheadSeconds) {
        revert RedstoneDefaultsLib.TimestampFromTooLongFuture(receivedTimestampSeconds, blockTimestamp);
      }
    } else if ((blockTimestamp - receivedTimestampSeconds) > maxDataDelaySeconds) {
      revert RedstoneDefaultsLib.TimestampIsTooOld(receivedTimestampSeconds, blockTimestamp);
    }
  }

  /**
   * @dev This function can be overriden, e.g. to use block.number instead of block.timestamp
   * It can be useful in some L2 chains, as sometimes their different blocks can have the same timestamp
   * @return timestamp Timestamp or Block number or any other number that can identify time in the context
   * of the given blockchain
   */
  function getBlockTimestamp() public view virtual returns (uint256) {
    return block.timestamp;
  }

  /**
   * @dev Helpful function for getting values for timestamp validation
   * @return  maxDataAheadSeconds Max allowed number of seconds ahead of block.timrstamp
   * @return  maxDataDelaySeconds Max allowed number of seconds for data delay
   */
  function getAllowedTimestampDiffsInSeconds() public view virtual returns (uint256 maxDataAheadSeconds, uint256 maxDataDelaySeconds) {
    maxDataAheadSeconds = RedstoneDefaultsLib.DEFAULT_MAX_DATA_TIMESTAMP_AHEAD_SECONDS;
    maxDataDelaySeconds = RedstoneDefaultsLib.DEFAULT_MAX_DATA_TIMESTAMP_DELAY_SECONDS;
  }

  /**
   * @dev Reverts if proposed data packages are not newer than the ones used previously
   * @param dataPackagesTimestamp Timestamp od the data packages (usually in milliseconds)
   */
  function _preventUpdateWithOlderDataPackages(uint256 dataPackagesTimestamp) internal view {
    uint256 dataTimestampFromLatestUpdate = getDataTimestampFromLatestUpdate();

    if (dataPackagesTimestamp <= dataTimestampFromLatestUpdate) {
      revert DataTimestampShouldBeNewerThanBefore(
        dataPackagesTimestamp,
        dataTimestampFromLatestUpdate
      );
    }
  }

  /**
   * @notice Returns data timestamp from the latest update
   * @dev It's virtual, because its implementation can sometimes be different
   * (e.g. SinglePriceFeedAdapterWithClearing)
   * @return lastDataTimestamp Timestamp of the latest reported data packages
   */
  function getDataTimestampFromLatestUpdate() public view virtual returns (uint256 lastDataTimestamp) {
    (lastDataTimestamp, ) = getTimestampsFromLatestUpdate();
  }

  /**
   * @notice Returns block timestamp of the latest successful update
   * @return blockTimestamp The block timestamp of the latest successful update
   */
  function getBlockTimestampFromLatestUpdate() public view returns (uint256 blockTimestamp) {
    (, blockTimestamp) = getTimestampsFromLatestUpdate();
  }

  /**
   * @dev Returns 2 timestamps packed into a single uint256 number
   * @return packedTimestamps a single uin256 number with 2 timestamps
   */
  function getPackedTimestampsFromLatestUpdate() public view returns (uint256 packedTimestamps) {
    assembly {
      packedTimestamps := sload(LATEST_UPDATE_TIMESTAMPS_STORAGE_LOCATION)
    }
  }

  /**
   * @notice Returns timestamps of the latest successful update
   * @return dataTimestamp timestamp (usually in milliseconds) from the signed data packages
   * @return blockTimestamp timestamp of the block when the update has happened
   */
  function getTimestampsFromLatestUpdate() public view virtual returns (uint128 dataTimestamp, uint128 blockTimestamp) {
    return _unpackTimestamps(getPackedTimestampsFromLatestUpdate());
  }


  /**
   * @dev A helpful function to unpack 2 timestamps from one uin256 number
   * @param packedTimestamps a single uin256 number
   * @return dataTimestamp fetched from left 128 bits
   * @return blockTimestamp fetched from right 128 bits
   */
  function _unpackTimestamps(uint256 packedTimestamps) internal pure returns (uint128 dataTimestamp, uint128 blockTimestamp) {
    dataTimestamp = uint128(packedTimestamps >> 128); // left 128 bits
    blockTimestamp = uint128(packedTimestamps); // right 128 bits
  }


  /**
   * @dev Logic of saving timestamps of the current update
   * By default, it stores packed timestamps in one storage slot (32 bytes)
   * to minimise gas costs
   * But it can be overriden (e.g. in SinglePriceFeedAdapter)
   * @param   dataPackagesTimestamp  .
   */
  function _saveTimestampsOfCurrentUpdate(uint256 dataPackagesTimestamp) internal virtual {
    uint256 blockTimestamp = getBlockTimestamp();

    if (blockTimestamp > MAX_NUMBER_FOR_128_BITS) {
      revert BlockTimestampIsTooBig(blockTimestamp);
    }

    if (dataPackagesTimestamp > MAX_NUMBER_FOR_128_BITS) {
      revert DataTimestampIsTooBig(dataPackagesTimestamp);
    }

    assembly {
      let timestamps := or(shl(BITS_COUNT_IN_16_BYTES, dataPackagesTimestamp), blockTimestamp)
      sstore(LATEST_UPDATE_TIMESTAMPS_STORAGE_LOCATION, timestamps)
    }
  }

  /**
   * @notice Returns the latest properly reported value of the data feed
   * @param dataFeedId The identifier of the requested data feed
   * @return value The latest value of the given data feed
   */
  function getValueForDataFeed(bytes32 dataFeedId) public view returns (uint256) {
    getDataFeedIndex(dataFeedId); // will revert if data feed id is not supported

    // "unsafe" here means "without validation"
    uint256 valueForDataFeed = getValueForDataFeedUnsafe(dataFeedId);

    validateDataFeedValue(dataFeedId, valueForDataFeed);
    return valueForDataFeed;
  }

  /**
   * @notice Returns the latest properly reported values for several data feeds
   * @param dataFeedIds The array of identifiers for the requested feeds
   * @return values Values of the requested data feeds in the corresponding order
   */
  function getValuesForDataFeeds(bytes32[] memory dataFeedIds) public view returns (uint256[] memory) {
    uint256[] memory values = getValuesForDataFeedsUnsafe(dataFeedIds);
    for (uint256 i = 0; i < dataFeedIds.length;) {
      bytes32 dataFeedId = dataFeedIds[i];
      getDataFeedIndex(dataFeedId); // will revert if data feed id is not supported
      validateDataFeedValue(dataFeedId, values[i]);
      unchecked { i++; } // reduces gas costs
    }
    return values;
  }


  /**
   * @dev Reverts if proposed value for the proposed data feed id is invalid
   * By default, it just checks if the value is not equal to 0, but it can be extended
   * @param dataFeedId The data feed identifier
   * @param valueForDataFeed Proposed value for the data feed
   */
  function validateDataFeedValue(bytes32 dataFeedId, uint256 valueForDataFeed) public pure virtual {
    if (valueForDataFeed == 0) {
      revert DataFeedValueCannotBeZero(dataFeedId);
    }
  }

  /**
   * @dev [HIGH RISK] Returns the latest value for a given data feed without validation
   * Important! Using this function instead of `getValueForDataFeed` may cause
   * significant risk for your smart contracts
   * @param dataFeedId The data feed identifier
   * @return dataFeedValue Unvalidated value of the latest successful update
   */
  function getValueForDataFeedUnsafe(bytes32 dataFeedId) public view virtual returns (uint256);

  /**
   * @notice [HIGH RISK] Returns the latest properly reported values for several data feeds without validation
   * Important! Using this function instead of `getValuesForDataFeeds` may cause
   * significant risk for your smart contracts
   * @param requestedDataFeedIds The array of identifiers for the requested feeds
   * @return values Unvalidated values of the requested data feeds in the corresponding order
   */
  function getValuesForDataFeedsUnsafe(bytes32[] memory requestedDataFeedIds) public view virtual returns (uint256[] memory values) {
    values = new uint256[](requestedDataFeedIds.length);
    for (uint256 i = 0; i < requestedDataFeedIds.length;) {
      values[i] = getValueForDataFeedUnsafe(requestedDataFeedIds[i]);
      unchecked { i++; } // reduces gas costs
    }
    return values;
  }
}

// File: @redstone-finance/on-chain-relayer/contracts/price-feeds/data-services/MergedPriceFeedAdapterWithoutRoundsPrimaryProd.sol



// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.14;

import {MergedPriceFeedAdapterWithoutRounds} from "../without-rounds/MergedPriceFeedAdapterWithoutRounds.sol";

abstract contract MergedPriceFeedAdapterWithoutRoundsPrimaryProd is MergedPriceFeedAdapterWithoutRounds {
  function getUniqueSignersThreshold() public view virtual override returns (uint8) {
    return 2;
  }

  function getAuthorisedSignerIndex(
    address signerAddress
  ) public view virtual override returns (uint8) {
    if (signerAddress == 0x8BB8F32Df04c8b654987DAaeD53D6B6091e3B774) { return 0; }
    else if (signerAddress == 0xdEB22f54738d54976C4c0fe5ce6d408E40d88499) { return 1; }
    else if (signerAddress == 0x51Ce04Be4b3E32572C4Ec9135221d0691Ba7d202) { return 2; }
    else if (signerAddress == 0xDD682daEC5A90dD295d14DA4b0bec9281017b5bE) { return 3; }
    else if (signerAddress == 0x9c5AE89C4Af6aA32cE58588DBaF90d18a855B6de) { return 4; }
    else {
      revert SignerNotAuthorised(signerAddress);
    }
  }
}

// File: @redstone-finance/on-chain-relayer/contracts/price-feeds/interfaces/IPriceFeed.sol



// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.14;

import {AggregatorV3Interface} from "@chainlink/contracts/src/v0.8/interfaces/AggregatorV3Interface.sol";
import {IPriceFeedLegacy} from "./IPriceFeedLegacy.sol";

/**
 * @title Complete price feed interface
 * @author The Redstone Oracles team
 * @dev All required public functions that must be implemented
 * by each Redstone PriceFeed contract
 */
interface IPriceFeed is IPriceFeedLegacy, AggregatorV3Interface {
  /**
   * @notice Returns data feed identifier for the PriceFeed contract
   * @return dataFeedId The identifier of the data feed
   */
  function getDataFeedId() external view returns (bytes32);
}

// File: @redstone-finance/on-chain-relayer/contracts/price-feeds/interfaces/IPriceFeedLegacy.sol



// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.14;

/**
 * @title Interface with the old Chainlink Price Feed functions
 * @author The Redstone Oracles team
 * @dev There are some projects (e.g. gmx-contracts) that still
 * rely on some legacy functions
 */
interface IPriceFeedLegacy {
  /**
   * @notice Old Chainlink function for getting the number of latest round
   * @return latestRound The number of the latest update round
   */
  function latestRound() external view returns (uint80);

  
  /**
   * @notice Old Chainlink function for getting the latest successfully reported value
   * @return latestAnswer The latest successfully reported value
   */
  function latestAnswer() external view returns (int256);
}

// File: @redstone-finance/on-chain-relayer/contracts/price-feeds/MergedPriceFeedAdapterCommon.sol



// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.14;
import {IRedstoneAdapter} from "../core/IRedstoneAdapter.sol";
import {SafeCast} from "@openzeppelin/contracts/utils/math/SafeCast.sol";

abstract contract MergedPriceFeedAdapterCommon {
  event AnswerUpdated(int256 indexed current, uint256 indexed roundId, uint256 updatedAt);

  error CannotUpdateMoreThanOneDataFeed();

  function getPriceFeedAdapter() public view virtual returns (IRedstoneAdapter) {
    return IRedstoneAdapter(address(this));
  }

  function aggregator() public view virtual returns (address) {
    return address(getPriceFeedAdapter());
  }
}

// File: @redstone-finance/on-chain-relayer/contracts/price-feeds/PriceFeedBase.sol



// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.14;

import {Initializable} from "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";
import {IRedstoneAdapter} from "../core/IRedstoneAdapter.sol";
import {IPriceFeed} from "./interfaces/IPriceFeed.sol";

/**
 * @title Main logic of the price feed contract
 * @author The Redstone Oracles team
 * @dev Implementation of common functions for the PriceFeed contract
 * that queries data from the specified PriceFeedAdapter
 * 
 * It can be used by projects that have already implemented with Chainlink-like
 * price feeds and would like to minimise changes in their existing codebase.
 * 
 * If you are flexible, it's much better (and cheaper in terms of gas) to query
 * the PriceFeedAdapter contract directly
 */
abstract contract PriceFeedBase is IPriceFeed, Initializable {
  uint256 internal constant INT256_MAX = uint256(type(int256).max);

  error UnsafeUintToIntConversion(uint256 value);

  /**
   * @dev Helpful function for upgradable contracts
   */
  function initialize() public virtual initializer {
    // We don't have storage variables, but we keep this function
    // Because it is used for contract setup in upgradable contracts
  }

  /**
   * @notice Returns data feed identifier for the PriceFeed contract
   * @return dataFeedId The identifier of the data feed
   */
  function getDataFeedId() public view virtual returns (bytes32);

  /**
   * @notice Returns the address of the price feed adapter
   * @return address The address of the price feed adapter
   */
  function getPriceFeedAdapter() public view virtual returns (IRedstoneAdapter);


  /**
   * @notice Returns the number of decimals for the price feed
   * @dev By default, RedStone uses 8 decimals for data feeds
   * @return decimals The number of decimals in the price feed values
   */
  function decimals() public virtual pure override returns (uint8) {
    return 8;
  }


  /**
   * @notice Description of the Price Feed
   * @return description
   */
  function description() public view virtual override returns (string memory) {
    return "Redstone Price Feed";
  }

  /**
   * @notice Version of the Price Feed
   * @dev Currently it has no specific motivation and was added
   * only to be compatible with the Chainlink interface
   * @return version
   */
  function version() public virtual pure override returns (uint256) {
    return 1;
  }


  /**
   * @notice Returns details of the latest successful update round
   * @dev It uses few helpful functions to abstract logic of getting
   * latest round id and value
   * @return roundId The number of the latest round
   * @return answer The latest reported value
   * @return startedAt Block timestamp when the latest successful round started
   * @return updatedAt Block timestamp of the latest successful round
   * @return answeredInRound The number of the latest round
   */
  function latestRoundData()
    public
    view
    override
    virtual
    returns (
      uint80 roundId,
      int256 answer,
      uint256 startedAt,
      uint256 updatedAt,
      uint80 answeredInRound
    )
  {
    roundId = latestRound();
    answer = latestAnswer();

    uint256 blockTimestamp = getPriceFeedAdapter().getBlockTimestampFromLatestUpdate();

    // These values are equal after chainlink’s OCR update
    startedAt = blockTimestamp;
    updatedAt = blockTimestamp;

    // We want to be compatible with Chainlink's interface
    // And in our case the roundId is always equal to answeredInRound
    answeredInRound = roundId;
  }

  /**
   * @notice Old Chainlink function for getting the latest successfully reported value
   * @return latestAnswer The latest successfully reported value
   */
  function latestAnswer() public virtual view returns (int256) {
    bytes32 dataFeedId = getDataFeedId();

    uint256 uintAnswer = getPriceFeedAdapter().getValueForDataFeed(dataFeedId);

    if (uintAnswer > INT256_MAX) {
      revert UnsafeUintToIntConversion(uintAnswer);
    }

    return int256(uintAnswer);
  }

  /**
   * @notice Old Chainlink function for getting the number of latest round
   * @return latestRound The number of the latest update round
   */
  function latestRound() public view virtual returns (uint80);
}

// File: @redstone-finance/on-chain-relayer/contracts/price-feeds/PriceFeedsAdapterBase.sol



// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.14;

import {Initializable} from "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";
import {RedstoneAdapterBase} from "../core/RedstoneAdapterBase.sol";

/**
 * @title Common logic of the price feeds adapter contracts
 * @author The Redstone Oracles team
 */
abstract contract PriceFeedsAdapterBase is RedstoneAdapterBase, Initializable {

  /**
   * @dev Helpful function for upgradable contracts
   */
  function initialize() public virtual initializer {
    // We don't have storage variables, but we keep this function
    // Because it is used for contract setup in upgradable contracts
  }

  /**
   * @dev This function is virtual and may contain additional logic in the derived contract
   * E.g. it can check if the updating conditions are met (e.g. if at least one
   * value is deviated enough)
   * @param dataFeedIdsArray Array of all data feeds identifiers
   * @param values The reported values that are validated and reported
   */
  function _validateAndUpdateDataFeedsValues(
    bytes32[] memory dataFeedIdsArray,
    uint256[] memory values
  ) internal virtual override {
    for (uint256 i = 0; i < dataFeedIdsArray.length;) {
      _validateAndUpdateDataFeedValue(dataFeedIdsArray[i], values[i]);
      unchecked { i++; } // reduces gas costs
    }
  }

  /**
   * @dev Helpful virtual function for handling value validation and saving in derived
   * Price Feed Adapters contracts 
   * @param dataFeedId The data feed identifier
   * @param dataFeedValue Proposed value for the data feed
   */
  function _validateAndUpdateDataFeedValue(bytes32 dataFeedId, uint256 dataFeedValue) internal virtual;
}

// File: @redstone-finance/on-chain-relayer/contracts/price-feeds/without-rounds/MergedPriceFeedAdapterWithoutRounds.sol



// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.14;

import {PriceFeedsAdapterBase, PriceFeedsAdapterWithoutRounds} from "./PriceFeedsAdapterWithoutRounds.sol";
import {PriceFeedBase, PriceFeedWithoutRounds} from "./PriceFeedWithoutRounds.sol";
import {IRedstoneAdapter} from "../../core/IRedstoneAdapter.sol";
import {MergedPriceFeedAdapterCommon} from "../MergedPriceFeedAdapterCommon.sol";
import {SafeCast} from "@openzeppelin/contracts/utils/math/SafeCast.sol";

abstract contract MergedPriceFeedAdapterWithoutRounds is
  MergedPriceFeedAdapterCommon,
  PriceFeedsAdapterWithoutRounds,
  PriceFeedWithoutRounds
{

  function initialize() public override(PriceFeedBase, PriceFeedsAdapterBase) initializer {
    // We don't have storage variables, but we keep this function
    // Because it is used for contract setup in upgradable contracts
  }

  function getPriceFeedAdapter() public view virtual override(MergedPriceFeedAdapterCommon, PriceFeedBase) returns (IRedstoneAdapter) {
    return super.getPriceFeedAdapter();
  }

  function getDataFeedIds() public view virtual override returns (bytes32[] memory dataFeedIds) {
    dataFeedIds = new bytes32[](1);
    dataFeedIds[0] = getDataFeedId();
  }

  function getDataFeedIndex(bytes32 dataFeedId) public view virtual override returns (uint256) {
    if (dataFeedId == getDataFeedId()) {
      return 0;
    } else {
      revert DataFeedIdNotFound(dataFeedId);
    }
  }

  function _emitEventAfterSingleValueUpdate(uint256 newValue) internal virtual {
    emit AnswerUpdated(SafeCast.toInt256(newValue), latestRound(), block.timestamp);
  }

  function _validateAndUpdateDataFeedsValues(
    bytes32[] memory dataFeedIdsArray,
    uint256[] memory values
  ) internal virtual override {
    if (dataFeedIdsArray.length != 1 || values.length != 1) {
      revert CannotUpdateMoreThanOneDataFeed();
    }
    _validateAndUpdateDataFeedValue(dataFeedIdsArray[0], values[0]);
    _emitEventAfterSingleValueUpdate(values[0]);
  }
}

// File: @redstone-finance/on-chain-relayer/contracts/price-feeds/without-rounds/PriceFeedsAdapterWithoutRounds.sol



// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.14;

import {PriceFeedsAdapterBase} from "../PriceFeedsAdapterBase.sol";

/**
 * @title Implementation of a price feeds adapter without rounds support
 * @author The Redstone Oracles team
 * @dev This contract is abstract, the following functions should be
 * implemented in the actual contract before deployment:
 * - getDataFeedIds
 * - getUniqueSignersThreshold
 * - getAuthorisedSignerIndex
 * 
 * We also recommend to override `getDataFeedIndex` function with hardcoded
 * values, as it can significantly reduce gas usage
 */
abstract contract PriceFeedsAdapterWithoutRounds is PriceFeedsAdapterBase {
  bytes32 constant VALUES_MAPPING_STORAGE_LOCATION = 0x4dd0c77efa6f6d590c97573d8c70b714546e7311202ff7c11c484cc841d91bfc; // keccak256("RedStone.oracleValuesMapping");

  /**
   * @dev Helpful virtual function for handling value validation and saving
   * @param dataFeedId The data feed identifier
   * @param dataFeedValue Proposed value for the data feed
   */
  function _validateAndUpdateDataFeedValue(bytes32 dataFeedId, uint256 dataFeedValue) internal override virtual {
    validateDataFeedValue(dataFeedId, dataFeedValue);
    bytes32 locationInStorage = _getValueLocationInStorage(dataFeedId);
    assembly {
      sstore(locationInStorage, dataFeedValue)
    }
  }

  /**
   * @dev [HIGH RISK] Returns the latest value for a given data feed without validation
   * Important! Using this function instead of `getValueForDataFeed` may cause
   * significant risk for your smart contracts
   * @param dataFeedId The data feed identifier
   * @return dataFeedValue Unvalidated value of the latest successful update
   */
  function getValueForDataFeedUnsafe(bytes32 dataFeedId) public view  virtual override returns (uint256 dataFeedValue) {
    bytes32 locationInStorage = _getValueLocationInStorage(dataFeedId);
    assembly {
      dataFeedValue := sload(locationInStorage)
    }
  }

  /**
   * @dev Helpful function for getting storage location for the requested data feed
   * @param dataFeedId Requested data feed identifier
   * @return locationInStorage
   */
  function _getValueLocationInStorage(bytes32 dataFeedId) private pure returns (bytes32) {
    return keccak256(abi.encode(dataFeedId, VALUES_MAPPING_STORAGE_LOCATION));
  }
}

// File: @redstone-finance/on-chain-relayer/contracts/price-feeds/without-rounds/PriceFeedWithoutRounds.sol



// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.14;

import {PriceFeedBase} from "../PriceFeedBase.sol";

/**
 * @title Implementation of a price feed contract without rounds support
 * @author The Redstone Oracles team
 * @dev This contract is abstract. The actual contract instance
 * must implement the following functions:
 * - getDataFeedId
 * - getPriceFeedAdapter
 */
abstract contract PriceFeedWithoutRounds is PriceFeedBase {
  uint80 constant DEFAULT_ROUND = 1;

  error GetRoundDataCanBeOnlyCalledWithLatestRound(uint80 requestedRoundId);

  /**
   * @dev We always return 1, since we do not support rounds in this contract
   */
  function latestRound() public pure override returns (uint80) {
    return DEFAULT_ROUND;
  }
  
  /**
   * @dev There are possible use cases that some contracts don't need values from old rounds
   * but still rely on `getRoundData` or `latestRounud` functions
   */
  function getRoundData(uint80 requestedRoundId) public view override returns (uint80 roundId, int256 answer, uint256 startedAt, uint256 updatedAt, uint80 answeredInRound) {
    if (requestedRoundId != latestRound()) {
      revert GetRoundDataCanBeOnlyCalledWithLatestRound(requestedRoundId);
    }
    return latestRoundData();
  }
}

// File: contracts/__addresses/Addresses.sol



// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.4;

library OldGelatoAddress {
  address constant public ADDR = 0xc4D1AE5E796E6d7561cdc8335F85e6B57a36e097;
}

library GelatoAddress {
  address constant public ADDR = 0xCD6BfDA4D95d5C0f3f2882dC221D792392c99714;
}

// File: contracts/ethereumStakewiseOsetheth/MergedAdapterWithoutRoundsOsethethV2.sol



// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.4;

import {MergedPriceFeedAdapterWithoutRoundsPrimaryProd} from "@redstone-finance/on-chain-relayer/contracts/price-feeds/data-services/MergedPriceFeedAdapterWithoutRoundsPrimaryProd.sol";
import {OldGelatoAddress, GelatoAddress} from "../__addresses/Addresses.sol";

contract MergedAdapterWithoutRoundsOsethethV2 is MergedPriceFeedAdapterWithoutRoundsPrimaryProd {

  address internal constant MAIN_UPDATER_ADDRESS = 0xcd1435F09c411FCBc44DA4A51f5C1a2e1b32fF47;
  address internal constant FALLBACK_UPDATER_ADDRESS = 0x9Abfefd388ae17E0B8a9F865EB1cCb137bf436cF;
  address internal constant MANUAL_UPDATER_ADDRESS = 0xc1c090658937107675cBFe4494E6b63519538B62;

  error UpdaterNotAuthorised(address signer);

  function getDataFeedId() public pure virtual override returns (bytes32) {
    return bytes32("osETH/ETH");
  }

  function requireAuthorisedUpdater(address updater) public view override virtual {
    if (
      updater != MAIN_UPDATER_ADDRESS &&
      updater != FALLBACK_UPDATER_ADDRESS &&
      updater != MANUAL_UPDATER_ADDRESS &&
      updater != GelatoAddress.ADDR &&
      updater != OldGelatoAddress.ADDR
    ) {
      revert UpdaterNotAuthorised(updater);
    }
  }
}