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/**SPDX-License-Identifier: BUSL-1.1

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 */
pragma solidity 0.8.16;
import "contracts/lending/chainlink/AggregatorV3Interface.sol";
import "contracts/lending/rwaOracles/IRWAOracleExternalComparisonCheck.sol";
import "contracts/cash/external/openzeppelin/contracts/access/AccessControlEnumerable.sol";

contract RWAOracleExternalComparisonCheck is
  IRWAOracleExternalComparisonCheck,
  AccessControlEnumerable
{
  /// @notice Helper struct for storing SHV data from Chainlink
  struct ChainlinkRoundData {
    uint80 roundId;
    int256 answer;
    uint256 startedAt;
    uint256 updatedAt;
    uint80 answeredInRound;
  }

  // Price of RWA token (OUSG, OSTB, OHYG, etc.)
  int256 public rwaPrice;

  // Timestamp in which the RWA token price was last set
  uint256 public priceTimestamp;

  // The associated Chainlink price update associated with the stored
  // `rwaPrice`
  ChainlinkRoundData public lastSetRound;

  // Chainlink oracle whose tracked instrument is used to constrain price updates.
  AggregatorV3Interface public immutable chainlinkOracle;

  // Description of oracle set in Constructor
  string public description;

  // How recent a Chainlink update needs to be in order to be associated to
  // a RWA price change.
  uint256 public constant MAX_CL_WINDOW = 25 hours;

  // Helper constant that allows us to specify basis points in calculations
  int256 public constant BPS_DENOMINATOR = 10_000;

  // Amount of bps that the RWA price can differ from the SHV change. For
  // example, if SHV changes by 1% in between RWA price updates,
  // RWA token can change between .26% and 1.74%
  uint256 public constant MAX_CHANGE_DIFF_BPS = 74;

  // Max amount of bps that RWA price in a single price update.
  uint256 public constant MAX_ABSOLUTE_DIFF_BPS = 200;

  // Minimum time between price updates
  uint256 public constant MIN_PRICE_UPDATE_WINDOW = 23 hours;

  /// @notice How many decimals `rwaPrice` is represented in
  /// @dev UNUSED AND UNENFORCED - This is present only for operational
  ///      clarity.
  uint256 public constant decimals = 18;

  // Role that can set RWA price
  bytes32 public constant SETTER_ROLE = keccak256("SETTER_ROLE");

  /**
   * @notice constructor
   *
   * @param _initialPrice     The initial RWA price
   * @param _chainlinkOracle Chainlink oracle to compare differences with
   * @param _description     Human readable description
   * @param _admin           admin which holds the DEFAULT_ADMIN_ROLE
   * @param _setter          setter address which holds the role to set rwa price
   */
  constructor(
    int256 _initialPrice,
    address _chainlinkOracle,
    string memory _description,
    address _admin,
    address _setter
  ) {
    if (_admin == address(0) || _setter == address(0)) {
      revert InvalidAddress();
    }
    chainlinkOracle = AggregatorV3Interface(_chainlinkOracle);
    // Revert if Chainlink oracle is not reporting 8 decimals
    if (chainlinkOracle.decimals() != 8) {
      revert CorruptedChainlinkResponse();
    }

    ChainlinkRoundData memory round = _getLatestChainlinkRoundData();
    if (block.timestamp > round.updatedAt + MAX_CL_WINDOW) {
      revert ChainlinkOraclePriceStale();
    }

    description = _description;
    rwaPrice = _initialPrice;
    priceTimestamp = block.timestamp;
    lastSetRound = round;

    _grantRole(DEFAULT_ADMIN_ROLE, _admin);
    _grantRole(SETTER_ROLE, _setter);
  }

  /**
   * @notice Retrieve the last set RWA price data
   *
   * @dev `price` is in 18 decimals, `timestamp` is unix seconds since epoch
   */
  function getPriceData()
    external
    view
    override
    returns (uint256 price, uint256 timestamp)
  {
    price = uint256(rwaPrice);
    timestamp = priceTimestamp;
  }

  /**
   * @notice Sets the price of RWA if all the following criteria are met:
   *  - It is able to pull a consistent and recent Chainlink price that is
   *    different than the last used Chainlink round
   *  - The price wasn't updated too recently (`MIN_PRICE_UPDATE_WINDOW`
   *    seconds)
   *  - The change in RWA price is < MAX_ABSOLUTE_DIFF_BPS
   *  - The change in RWA price has not deviated `MAX_CHANGE_DIFF_BPS` more
   *    than the change in the Chainlink price.
   * If the change in Chainlink price is larger than `MAX_ABSOLUTE_DIFF_BPS +
   * MAX_CHANGE_DIFF_BPS` it is deemed malfunctioning and ignored.
   *
   * @param newPrice The new price of some RWA token (In `decimals` decimals)
   *
   * @dev The decimal representation is not enforced yet must be respected by
   *      the caller of this function and deployer of this contract
   */
  function setPrice(int256 newPrice) external override onlyRole(SETTER_ROLE) {
    // RWA price must be greater than zero
    if (newPrice <= 0) {
      revert InvalidRWAPrice();
    }

    ChainlinkRoundData memory round = _getLatestChainlinkRoundData();
    // Chainlink price update must be recent
    if (block.timestamp > round.updatedAt + MAX_CL_WINDOW) {
      revert ChainlinkOraclePriceStale();
    }

    // Chainlink price update must not be comparing the same rounds against
    // eachother
    if (round.roundId == lastSetRound.roundId) {
      revert ChainlinkRoundNotUpdated();
    }

    // Ensure at least `MIN_PRICE_UPDATE_WINDOW` seconds have passed since
    // last RWA price update
    if (block.timestamp < priceTimestamp + MIN_PRICE_UPDATE_WINDOW) {
      revert PriceUpdateWindowViolation();
    }

    int256 rwaPriceChangeBps = _getPriceChangeBps(rwaPrice, newPrice);
    // Never allow a price change that violates the max absolute change
    // threshold.
    if (_abs_unsigned(rwaPriceChangeBps) > MAX_ABSOLUTE_DIFF_BPS) {
      revert AbsoluteDifferenceConstraintViolated();
    }

    int256 chainlinkPriceChangeBps = _getPriceChangeBps(
      lastSetRound.answer,
      round.answer
    );

    if (
      _abs_unsigned(chainlinkPriceChangeBps) <=
      MAX_ABSOLUTE_DIFF_BPS + MAX_CHANGE_DIFF_BPS
    ) {
      // Chainlink price change is sane, so we compare rwa price changes
      // against the Chainlink price changes.
      uint256 changeDifferenceBps = _abs_unsigned(
        rwaPriceChangeBps - chainlinkPriceChangeBps
      );

      if (changeDifferenceBps > MAX_CHANGE_DIFF_BPS) {
        revert DeltaDifferenceConstraintViolation();
      }
    } else {
      emit ChainlinkPriceIgnored(
        lastSetRound.answer,
        lastSetRound.roundId,
        round.answer,
        round.roundId
      );
    }

    emit RWAExternalComparisonCheckPriceSet(
      lastSetRound.answer,
      lastSetRound.roundId,
      round.answer,
      round.roundId,
      rwaPrice,
      newPrice
    );

    rwaPrice = newPrice;
    priceTimestamp = block.timestamp;
    lastSetRound = round;
  }

  /**
   * @notice Retrieve latest Chainlink data
   *
   * @dev Reverts if any corruption is detected in Chainlink response
   */
  function _getLatestChainlinkRoundData()
    private
    view
    returns (ChainlinkRoundData memory round)
  {
    (
      uint80 roundId,
      int256 answer,
      uint256 startedAt,
      uint256 updatedAt,
      uint80 answeredInRound
    ) = chainlinkOracle.latestRoundData();
    if (
      answer < 0 ||
      roundId != answeredInRound ||
      roundId == 0 ||
      updatedAt == 0 ||
      updatedAt > block.timestamp
    ) {
      revert CorruptedChainlinkResponse();
    }
    round = ChainlinkRoundData(
      roundId,
      answer,
      startedAt,
      updatedAt,
      answeredInRound
    );
  }

  /**
   * @notice Compute the price change in basis point
   *
   * @param previousPrice Previous price
   * @param newPrice      New price
   *
   * @dev The price change can be negative.
   */
  function _getPriceChangeBps(
    int256 previousPrice,
    int256 newPrice
  ) private pure returns (int256 changeBps) {
    int256 change = newPrice - previousPrice;
    changeBps = (change * BPS_DENOMINATOR) / previousPrice;
  }

  /**
   * @notice returns the absolute value of the input.
   *
   * @param x the number to return absolute value of.
   */
  function _abs_unsigned(int256 x) private pure returns (uint256) {
    return x >= 0 ? uint256(x) : uint256(-x);
  }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (access/AccessControl.sol)

pragma solidity ^0.8.0;

import "contracts/cash/external/openzeppelin/contracts/access/IAccessControl.sol";
import "contracts/cash/external/openzeppelin/contracts/utils/Context.sol";
import "contracts/cash/external/openzeppelin/contracts/utils/Strings.sol";
import "contracts/cash/external/openzeppelin/contracts/utils/ERC165.sol";

/**
 * @dev Contract module that allows children to implement role-based access
 * control mechanisms. This is a lightweight version that doesn't allow enumerating role
 * members except through off-chain means by accessing the contract event logs. Some
 * applications may benefit from on-chain enumerability, for those cases see
 * {AccessControlEnumerable}.
 *
 * Roles are referred to by their `bytes32` identifier. These should be exposed
 * in the external API and be unique. The best way to achieve this is by
 * using `public constant` hash digests:
 *
 * ```
 * bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
 * ```
 *
 * Roles can be used to represent a set of permissions. To restrict access to a
 * function call, use {hasRole}:
 *
 * ```
 * function foo() public {
 *     require(hasRole(MY_ROLE, msg.sender));
 *     ...
 * }
 * ```
 *
 * Roles can be granted and revoked dynamically via the {grantRole} and
 * {revokeRole} functions. Each role has an associated admin role, and only
 * accounts that have a role's admin role can call {grantRole} and {revokeRole}.
 *
 * By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
 * that only accounts with this role will be able to grant or revoke other
 * roles. More complex role relationships can be created by using
 * {_setRoleAdmin}.
 *
 * WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
 * grant and revoke this role. Extra precautions should be taken to secure
 * accounts that have been granted it.
 */
abstract contract AccessControl is Context, IAccessControl, ERC165 {
  struct RoleData {
    mapping(address => bool) members;
    bytes32 adminRole;
  }

  mapping(bytes32 => RoleData) private _roles;

  bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;

  /**
   * @dev Modifier that checks that an account has a specific role. Reverts
   * with a standardized message including the required role.
   *
   * The format of the revert reason is given by the following regular expression:
   *
   *  /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
   *
   * _Available since v4.1._
   */
  modifier onlyRole(bytes32 role) {
    _checkRole(role, _msgSender());
    _;
  }

  /**
   * @dev See {IERC165-supportsInterface}.
   */
  function supportsInterface(bytes4 interfaceId)
    public
    view
    virtual
    override
    returns (bool)
  {
    return
      interfaceId == type(IAccessControl).interfaceId ||
      super.supportsInterface(interfaceId);
  }

  /**
   * @dev Returns `true` if `account` has been granted `role`.
   */
  function hasRole(bytes32 role, address account)
    public
    view
    virtual
    override
    returns (bool)
  {
    return _roles[role].members[account];
  }

  /**
   * @dev Revert with a standard message if `account` is missing `role`.
   *
   * The format of the revert reason is given by the following regular expression:
   *
   *  /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
   */
  function _checkRole(bytes32 role, address account) internal view virtual {
    if (!hasRole(role, account)) {
      revert(
        string(
          abi.encodePacked(
            "AccessControl: account ",
            Strings.toHexString(uint160(account), 20),
            " is missing role ",
            Strings.toHexString(uint256(role), 32)
          )
        )
      );
    }
  }

  /**
   * @dev Returns the admin role that controls `role`. See {grantRole} and
   * {revokeRole}.
   *
   * To change a role's admin, use {_setRoleAdmin}.
   */
  function getRoleAdmin(bytes32 role)
    public
    view
    virtual
    override
    returns (bytes32)
  {
    return _roles[role].adminRole;
  }

  /**
   * @dev Grants `role` to `account`.
   *
   * If `account` had not been already granted `role`, emits a {RoleGranted}
   * event.
   *
   * Requirements:
   *
   * - the caller must have ``role``'s admin role.
   */
  function grantRole(bytes32 role, address account)
    public
    virtual
    override
    onlyRole(getRoleAdmin(role))
  {
    _grantRole(role, account);
  }

  /**
   * @dev Revokes `role` from `account`.
   *
   * If `account` had been granted `role`, emits a {RoleRevoked} event.
   *
   * Requirements:
   *
   * - the caller must have ``role``'s admin role.
   */
  function revokeRole(bytes32 role, address account)
    public
    virtual
    override
    onlyRole(getRoleAdmin(role))
  {
    _revokeRole(role, account);
  }

  /**
   * @dev Revokes `role` from the calling account.
   *
   * Roles are often managed via {grantRole} and {revokeRole}: this function's
   * purpose is to provide a mechanism for accounts to lose their privileges
   * if they are compromised (such as when a trusted device is misplaced).
   *
   * If the calling account had been revoked `role`, emits a {RoleRevoked}
   * event.
   *
   * Requirements:
   *
   * - the caller must be `account`.
   */
  function renounceRole(bytes32 role, address account) public virtual override {
    require(
      account == _msgSender(),
      "AccessControl: can only renounce roles for self"
    );

    _revokeRole(role, account);
  }

  /**
   * @dev Grants `role` to `account`.
   *
   * If `account` had not been already granted `role`, emits a {RoleGranted}
   * event. Note that unlike {grantRole}, this function doesn't perform any
   * checks on the calling account.
   *
   * [WARNING]
   * ====
   * This function should only be called from the constructor when setting
   * up the initial roles for the system.
   *
   * Using this function in any other way is effectively circumventing the admin
   * system imposed by {AccessControl}.
   * ====
   *
   * NOTE: This function is deprecated in favor of {_grantRole}.
   */
  function _setupRole(bytes32 role, address account) internal virtual {
    _grantRole(role, account);
  }

  /**
   * @dev Sets `adminRole` as ``role``'s admin role.
   *
   * Emits a {RoleAdminChanged} event.
   */
  function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
    bytes32 previousAdminRole = getRoleAdmin(role);
    _roles[role].adminRole = adminRole;
    emit RoleAdminChanged(role, previousAdminRole, adminRole);
  }

  /**
   * @dev Grants `role` to `account`.
   *
   * Internal function without access restriction.
   */
  function _grantRole(bytes32 role, address account) internal virtual {
    if (!hasRole(role, account)) {
      _roles[role].members[account] = true;
      emit RoleGranted(role, account, _msgSender());
    }
  }

  /**
   * @dev Revokes `role` from `account`.
   *
   * Internal function without access restriction.
   */
  function _revokeRole(bytes32 role, address account) internal virtual {
    if (hasRole(role, account)) {
      _roles[role].members[account] = false;
      emit RoleRevoked(role, account, _msgSender());
    }
  }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (access/AccessControlEnumerable.sol)

pragma solidity ^0.8.0;

import "contracts/cash/external/openzeppelin/contracts/access/IAccessControlEnumerable.sol";
import "contracts/cash/external/openzeppelin/contracts/access/AccessControl.sol";
import "contracts/cash/external/openzeppelin/contracts/utils/EnumerableSet.sol";

/**
 * @dev Extension of {AccessControl} that allows enumerating the members of each role.
 */
abstract contract AccessControlEnumerable is
  IAccessControlEnumerable,
  AccessControl
{
  using EnumerableSet for EnumerableSet.AddressSet;

  mapping(bytes32 => EnumerableSet.AddressSet) private _roleMembers;

  /**
   * @dev See {IERC165-supportsInterface}.
   */
  function supportsInterface(bytes4 interfaceId)
    public
    view
    virtual
    override
    returns (bool)
  {
    return
      interfaceId == type(IAccessControlEnumerable).interfaceId ||
      super.supportsInterface(interfaceId);
  }

  /**
   * @dev Returns one of the accounts that have `role`. `index` must be a
   * value between 0 and {getRoleMemberCount}, non-inclusive.
   *
   * Role bearers are not sorted in any particular way, and their ordering may
   * change at any point.
   *
   * WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure
   * you perform all queries on the same block. See the following
   * https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post]
   * for more information.
   */
  function getRoleMember(bytes32 role, uint256 index)
    public
    view
    virtual
    override
    returns (address)
  {
    return _roleMembers[role].at(index);
  }

  /**
   * @dev Returns the number of accounts that have `role`. Can be used
   * together with {getRoleMember} to enumerate all bearers of a role.
   */
  function getRoleMemberCount(bytes32 role)
    public
    view
    virtual
    override
    returns (uint256)
  {
    return _roleMembers[role].length();
  }

  /**
   * @dev Overload {_grantRole} to track enumerable memberships
   */
  function _grantRole(bytes32 role, address account) internal virtual override {
    super._grantRole(role, account);
    _roleMembers[role].add(account);
  }

  /**
   * @dev Overload {_revokeRole} to track enumerable memberships
   */
  function _revokeRole(bytes32 role, address account)
    internal
    virtual
    override
  {
    super._revokeRole(role, account);
    _roleMembers[role].remove(account);
  }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/IAccessControl.sol)

pragma solidity ^0.8.0;

/**
 * @dev External interface of AccessControl declared to support ERC165 detection.
 */
interface IAccessControl {
  /**
   * @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
   *
   * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
   * {RoleAdminChanged} not being emitted signaling this.
   *
   * _Available since v3.1._
   */
  event RoleAdminChanged(
    bytes32 indexed role,
    bytes32 indexed previousAdminRole,
    bytes32 indexed newAdminRole
  );

  /**
   * @dev Emitted when `account` is granted `role`.
   *
   * `sender` is the account that originated the contract call, an admin role
   * bearer except when using {AccessControl-_setupRole}.
   */
  event RoleGranted(
    bytes32 indexed role,
    address indexed account,
    address indexed sender
  );

  /**
   * @dev Emitted when `account` is revoked `role`.
   *
   * `sender` is the account that originated the contract call:
   *   - if using `revokeRole`, it is the admin role bearer
   *   - if using `renounceRole`, it is the role bearer (i.e. `account`)
   */
  event RoleRevoked(
    bytes32 indexed role,
    address indexed account,
    address indexed sender
  );

  /**
   * @dev Returns `true` if `account` has been granted `role`.
   */
  function hasRole(bytes32 role, address account) external view returns (bool);

  /**
   * @dev Returns the admin role that controls `role`. See {grantRole} and
   * {revokeRole}.
   *
   * To change a role's admin, use {AccessControl-_setRoleAdmin}.
   */
  function getRoleAdmin(bytes32 role) external view returns (bytes32);

  /**
   * @dev Grants `role` to `account`.
   *
   * If `account` had not been already granted `role`, emits a {RoleGranted}
   * event.
   *
   * Requirements:
   *
   * - the caller must have ``role``'s admin role.
   */
  function grantRole(bytes32 role, address account) external;

  /**
   * @dev Revokes `role` from `account`.
   *
   * If `account` had been granted `role`, emits a {RoleRevoked} event.
   *
   * Requirements:
   *
   * - the caller must have ``role``'s admin role.
   */
  function revokeRole(bytes32 role, address account) external;

  /**
   * @dev Revokes `role` from the calling account.
   *
   * Roles are often managed via {grantRole} and {revokeRole}: this function's
   * purpose is to provide a mechanism for accounts to lose their privileges
   * if they are compromised (such as when a trusted device is misplaced).
   *
   * If the calling account had been granted `role`, emits a {RoleRevoked}
   * event.
   *
   * Requirements:
   *
   * - the caller must be `account`.
   */
  function renounceRole(bytes32 role, address account) external;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/IAccessControlEnumerable.sol)

pragma solidity ^0.8.0;

import "contracts/cash/external/openzeppelin/contracts/access/IAccessControl.sol";

/**
 * @dev External interface of AccessControlEnumerable declared to support ERC165 detection.
 */
interface IAccessControlEnumerable is IAccessControl {
  /**
   * @dev Returns one of the accounts that have `role`. `index` must be a
   * value between 0 and {getRoleMemberCount}, non-inclusive.
   *
   * Role bearers are not sorted in any particular way, and their ordering may
   * change at any point.
   *
   * WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure
   * you perform all queries on the same block. See the following
   * https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post]
   * for more information.
   */
  function getRoleMember(bytes32 role, uint256 index)
    external
    view
    returns (address);

  /**
   * @dev Returns the number of accounts that have `role`. Can be used
   * together with {getRoleMember} to enumerate all bearers of a role.
   */
  function getRoleMemberCount(bytes32 role) external view returns (uint256);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
  function _msgSender() internal view virtual returns (address) {
    return msg.sender;
  }

  function _msgData() internal view virtual returns (bytes calldata) {
    return msg.data;
  }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)

pragma solidity ^0.8.0;

import "contracts/cash/external/openzeppelin/contracts/utils/IERC165.sol";

/**
 * @dev Implementation of the {IERC165} interface.
 *
 * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
 * for the additional interface id that will be supported. For example:
 *
 * ```solidity
 * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
 *     return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
 * }
 * ```
 *
 * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
 */
abstract contract ERC165 is IERC165 {
  /**
   * @dev See {IERC165-supportsInterface}.
   */
  function supportsInterface(bytes4 interfaceId)
    public
    view
    virtual
    override
    returns (bool)
  {
    return interfaceId == type(IERC165).interfaceId;
  }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/structs/EnumerableSet.sol)

pragma solidity ^0.8.0;

/**
 * @dev Library for managing
 * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
 * types.
 *
 * Sets have the following properties:
 *
 * - Elements are added, removed, and checked for existence in constant time
 * (O(1)).
 * - Elements are enumerated in O(n). No guarantees are made on the ordering.
 *
 * ```
 * contract Example {
 *     // Add the library methods
 *     using EnumerableSet for EnumerableSet.AddressSet;
 *
 *     // Declare a set state variable
 *     EnumerableSet.AddressSet private mySet;
 * }
 * ```
 *
 * As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`)
 * and `uint256` (`UintSet`) are supported.
 */
library EnumerableSet {
  // To implement this library for multiple types with as little code
  // repetition as possible, we write it in terms of a generic Set type with
  // bytes32 values.
  // The Set implementation uses private functions, and user-facing
  // implementations (such as AddressSet) are just wrappers around the
  // underlying Set.
  // This means that we can only create new EnumerableSets for types that fit
  // in bytes32.

  struct Set {
    // Storage of set values
    bytes32[] _values;
    // Position of the value in the `values` array, plus 1 because index 0
    // means a value is not in the set.
    mapping(bytes32 => uint256) _indexes;
  }

  /**
   * @dev Add a value to a set. O(1).
   *
   * Returns true if the value was added to the set, that is if it was not
   * already present.
   */
  function _add(Set storage set, bytes32 value) private returns (bool) {
    if (!_contains(set, value)) {
      set._values.push(value);
      // The value is stored at length-1, but we add 1 to all indexes
      // and use 0 as a sentinel value
      set._indexes[value] = set._values.length;
      return true;
    } else {
      return false;
    }
  }

  /**
   * @dev Removes a value from a set. O(1).
   *
   * Returns true if the value was removed from the set, that is if it was
   * present.
   */
  function _remove(Set storage set, bytes32 value) private returns (bool) {
    // We read and store the value's index to prevent multiple reads from the same storage slot
    uint256 valueIndex = set._indexes[value];

    if (valueIndex != 0) {
      // Equivalent to contains(set, value)
      // To delete an element from the _values array in O(1), we swap the element to delete with the last one in
      // the array, and then remove the last element (sometimes called as 'swap and pop').
      // This modifies the order of the array, as noted in {at}.

      uint256 toDeleteIndex = valueIndex - 1;
      uint256 lastIndex = set._values.length - 1;

      if (lastIndex != toDeleteIndex) {
        bytes32 lastvalue = set._values[lastIndex];

        // Move the last value to the index where the value to delete is
        set._values[toDeleteIndex] = lastvalue;
        // Update the index for the moved value
        set._indexes[lastvalue] = valueIndex; // Replace lastvalue's index to valueIndex
      }

      // Delete the slot where the moved value was stored
      set._values.pop();

      // Delete the index for the deleted slot
      delete set._indexes[value];

      return true;
    } else {
      return false;
    }
  }

  /**
   * @dev Returns true if the value is in the set. O(1).
   */
  function _contains(Set storage set, bytes32 value)
    private
    view
    returns (bool)
  {
    return set._indexes[value] != 0;
  }

  /**
   * @dev Returns the number of values on the set. O(1).
   */
  function _length(Set storage set) private view returns (uint256) {
    return set._values.length;
  }

  /**
   * @dev Returns the value stored at position `index` in the set. O(1).
   *
   * Note that there are no guarantees on the ordering of values inside the
   * array, and it may change when more values are added or removed.
   *
   * Requirements:
   *
   * - `index` must be strictly less than {length}.
   */
  function _at(Set storage set, uint256 index) private view returns (bytes32) {
    return set._values[index];
  }

  /**
   * @dev Return the entire set in an array
   *
   * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
   * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
   * this function has an unbounded cost, and using it as part of a state-changing function may render the function
   * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
   */
  function _values(Set storage set) private view returns (bytes32[] memory) {
    return set._values;
  }

  // Bytes32Set

  struct Bytes32Set {
    Set _inner;
  }

  /**
   * @dev Add a value to a set. O(1).
   *
   * Returns true if the value was added to the set, that is if it was not
   * already present.
   */
  function add(Bytes32Set storage set, bytes32 value) internal returns (bool) {
    return _add(set._inner, value);
  }

  /**
   * @dev Removes a value from a set. O(1).
   *
   * Returns true if the value was removed from the set, that is if it was
   * present.
   */
  function remove(Bytes32Set storage set, bytes32 value)
    internal
    returns (bool)
  {
    return _remove(set._inner, value);
  }

  /**
   * @dev Returns true if the value is in the set. O(1).
   */
  function contains(Bytes32Set storage set, bytes32 value)
    internal
    view
    returns (bool)
  {
    return _contains(set._inner, value);
  }

  /**
   * @dev Returns the number of values in the set. O(1).
   */
  function length(Bytes32Set storage set) internal view returns (uint256) {
    return _length(set._inner);
  }

  /**
   * @dev Returns the value stored at position `index` in the set. O(1).
   *
   * Note that there are no guarantees on the ordering of values inside the
   * array, and it may change when more values are added or removed.
   *
   * Requirements:
   *
   * - `index` must be strictly less than {length}.
   */
  function at(Bytes32Set storage set, uint256 index)
    internal
    view
    returns (bytes32)
  {
    return _at(set._inner, index);
  }

  /**
   * @dev Return the entire set in an array
   *
   * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
   * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
   * this function has an unbounded cost, and using it as part of a state-changing function may render the function
   * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
   */
  function values(Bytes32Set storage set)
    internal
    view
    returns (bytes32[] memory)
  {
    return _values(set._inner);
  }

  // AddressSet

  struct AddressSet {
    Set _inner;
  }

  /**
   * @dev Add a value to a set. O(1).
   *
   * Returns true if the value was added to the set, that is if it was not
   * already present.
   */
  function add(AddressSet storage set, address value) internal returns (bool) {
    return _add(set._inner, bytes32(uint256(uint160(value))));
  }

  /**
   * @dev Removes a value from a set. O(1).
   *
   * Returns true if the value was removed from the set, that is if it was
   * present.
   */
  function remove(AddressSet storage set, address value)
    internal
    returns (bool)
  {
    return _remove(set._inner, bytes32(uint256(uint160(value))));
  }

  /**
   * @dev Returns true if the value is in the set. O(1).
   */
  function contains(AddressSet storage set, address value)
    internal
    view
    returns (bool)
  {
    return _contains(set._inner, bytes32(uint256(uint160(value))));
  }

  /**
   * @dev Returns the number of values in the set. O(1).
   */
  function length(AddressSet storage set) internal view returns (uint256) {
    return _length(set._inner);
  }

  /**
   * @dev Returns the value stored at position `index` in the set. O(1).
   *
   * Note that there are no guarantees on the ordering of values inside the
   * array, and it may change when more values are added or removed.
   *
   * Requirements:
   *
   * - `index` must be strictly less than {length}.
   */
  function at(AddressSet storage set, uint256 index)
    internal
    view
    returns (address)
  {
    return address(uint160(uint256(_at(set._inner, index))));
  }

  /**
   * @dev Return the entire set in an array
   *
   * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
   * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
   * this function has an unbounded cost, and using it as part of a state-changing function may render the function
   * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
   */
  function values(AddressSet storage set)
    internal
    view
    returns (address[] memory)
  {
    bytes32[] memory store = _values(set._inner);
    address[] memory result;

    assembly {
      result := store
    }

    return result;
  }

  // UintSet

  struct UintSet {
    Set _inner;
  }

  /**
   * @dev Add a value to a set. O(1).
   *
   * Returns true if the value was added to the set, that is if it was not
   * already present.
   */
  function add(UintSet storage set, uint256 value) internal returns (bool) {
    return _add(set._inner, bytes32(value));
  }

  /**
   * @dev Removes a value from a set. O(1).
   *
   * Returns true if the value was removed from the set, that is if it was
   * present.
   */
  function remove(UintSet storage set, uint256 value) internal returns (bool) {
    return _remove(set._inner, bytes32(value));
  }

  /**
   * @dev Returns true if the value is in the set. O(1).
   */
  function contains(UintSet storage set, uint256 value)
    internal
    view
    returns (bool)
  {
    return _contains(set._inner, bytes32(value));
  }

  /**
   * @dev Returns the number of values on the set. O(1).
   */
  function length(UintSet storage set) internal view returns (uint256) {
    return _length(set._inner);
  }

  /**
   * @dev Returns the value stored at position `index` in the set. O(1).
   *
   * Note that there are no guarantees on the ordering of values inside the
   * array, and it may change when more values are added or removed.
   *
   * Requirements:
   *
   * - `index` must be strictly less than {length}.
   */
  function at(UintSet storage set, uint256 index)
    internal
    view
    returns (uint256)
  {
    return uint256(_at(set._inner, index));
  }

  /**
   * @dev Return the entire set in an array
   *
   * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
   * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
   * this function has an unbounded cost, and using it as part of a state-changing function may render the function
   * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
   */
  function values(UintSet storage set)
    internal
    view
    returns (uint256[] memory)
  {
    bytes32[] memory store = _values(set._inner);
    uint256[] memory result;

    assembly {
      result := store
    }

    return result;
  }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[EIP].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165 {
  /**
   * @dev Returns true if this contract implements the interface defined by
   * `interfaceId`. See the corresponding
   * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
   * to learn more about how these ids are created.
   *
   * This function call must use less than 30 000 gas.
   */
  function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Strings.sol)

pragma solidity ^0.8.0;

/**
 * @dev String operations.
 */
library Strings {
  bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";

  /**
   * @dev Converts a `uint256` to its ASCII `string` decimal representation.
   */
  function toString(uint256 value) internal pure returns (string memory) {
    // Inspired by OraclizeAPI's implementation - MIT licence
    // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol

    if (value == 0) {
      return "0";
    }
    uint256 temp = value;
    uint256 digits;
    while (temp != 0) {
      digits++;
      temp /= 10;
    }
    bytes memory buffer = new bytes(digits);
    while (value != 0) {
      digits -= 1;
      buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
      value /= 10;
    }
    return string(buffer);
  }

  /**
   * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
   */
  function toHexString(uint256 value) internal pure returns (string memory) {
    if (value == 0) {
      return "0x00";
    }
    uint256 temp = value;
    uint256 length = 0;
    while (temp != 0) {
      length++;
      temp >>= 8;
    }
    return toHexString(value, length);
  }

  /**
   * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
   */
  function toHexString(uint256 value, uint256 length)
    internal
    pure
    returns (string memory)
  {
    bytes memory buffer = new bytes(2 * length + 2);
    buffer[0] = "0";
    buffer[1] = "x";
    for (uint256 i = 2 * length + 1; i > 1; --i) {
      buffer[i] = _HEX_SYMBOLS[value & 0xf];
      value >>= 4;
    }
    require(value == 0, "Strings: hex length insufficient");
    return string(buffer);
  }
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.16;

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
    );
}

/**SPDX-License-Identifier: BUSL-1.1

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   ╓██▀└ ,╓▄▄▄, '▀██▄
  ██▀ ▄██▀▀╙╙▀▀██▄ └██µ           ,,       ,,      ,     ,,,            ,,,
 ██ ,██¬ ▄████▄  ▀█▄ ╙█▄      ▄███▀▀███▄   ███▄    ██  ███▀▀▀███▄    ▄███▀▀███,
██  ██ ╒█▀'   ╙█▌ ╙█▌ ██     ▐██      ███  █████,  ██  ██▌    └██▌  ██▌     └██▌
██ ▐█▌ ██      ╟█  █▌ ╟█     ██▌      ▐██  ██ └███ ██  ██▌     ╟██ j██       ╟██
╟█  ██ ╙██    ▄█▀ ▐█▌ ██     ╙██      ██▌  ██   ╙████  ██▌    ▄██▀  ██▌     ,██▀
 ██ "██, ╙▀▀███████████⌐      ╙████████▀   ██     ╙██  ███████▀▀     ╙███████▀`
  ██▄ ╙▀██▄▄▄▄▄,,,                ¬─                                    '─¬
   ╙▀██▄ '╙╙╙▀▀▀▀▀▀▀▀
      ╙▀▀██████R⌐

 */
pragma solidity 0.8.16;

interface IRWAOracle {
  /// @notice Retrieve RWA price data
  function getPriceData()
    external
    view
    returns (uint256 price, uint256 timestamp);
}

/**SPDX-License-Identifier: BUSL-1.1

      ▄▄█████████▄
   ╓██▀└ ,╓▄▄▄, '▀██▄
  ██▀ ▄██▀▀╙╙▀▀██▄ └██µ           ,,       ,,      ,     ,,,            ,,,
 ██ ,██¬ ▄████▄  ▀█▄ ╙█▄      ▄███▀▀███▄   ███▄    ██  ███▀▀▀███▄    ▄███▀▀███,
██  ██ ╒█▀'   ╙█▌ ╙█▌ ██     ▐██      ███  █████,  ██  ██▌    └██▌  ██▌     └██▌
██ ▐█▌ ██      ╟█  █▌ ╟█     ██▌      ▐██  ██ └███ ██  ██▌     ╟██ j██       ╟██
╟█  ██ ╙██    ▄█▀ ▐█▌ ██     ╙██      ██▌  ██   ╙████  ██▌    ▄██▀  ██▌     ,██▀
 ██ "██, ╙▀▀███████████⌐      ╙████████▀   ██     ╙██  ███████▀▀     ╙███████▀`
  ██▄ ╙▀██▄▄▄▄▄,,,                ¬─                                    '─¬
   ╙▀██▄ '╙╙╙▀▀▀▀▀▀▀▀
      ╙▀▀██████R⌐
 */
pragma solidity 0.8.16;

import "contracts/lending/rwaOracles/IRWAOracle.sol";

interface IRWAOracleExternalComparisonCheck is IRWAOracle {
  /// @notice Set the RWA price
  function setPrice(int256 newPrice) external;

  /// EVENTS ///
  /**
   * @dev Event for when the price is set nominally
   *
   * @param oldChainlinkPrice Old Chainlink price
   * @param oldRoundId        Chainlink round ID of old price
   * @param newChainlinkPrice New Chainlink price
   * @param newRoundId        Chainlink round ID of old price
   * @param oldRWAPrice       Old RWA price
   * @param newRWAPrice       New RWA price
   */
  event RWAExternalComparisonCheckPriceSet(
    int256 oldChainlinkPrice,
    uint80 indexed oldRoundId,
    int256 newChainlinkPrice,
    uint80 indexed newRoundId,
    int256 oldRWAPrice,
    int256 newRWAPrice
  );

  /**
   * @dev Event for when the Chainlink price is out of reasonable bounds is
   *      is ignored
   *
   * @param oldChainlinkPrice Old Chainlink price
   * @param oldRoundId        Chainlink round ID of old price
   * @param newChainlinkPrice New Chainlink price
   * @param newRoundId        Chainlink round ID of old price
   */
  event ChainlinkPriceIgnored(
    int256 oldChainlinkPrice,
    uint80 indexed oldRoundId,
    int256 newChainlinkPrice,
    uint80 indexed newRoundId
  );

  /// ERRORS ///
  error CorruptedChainlinkResponse();
  error ChainlinkOraclePriceStale();
  error DeltaDifferenceConstraintViolation();
  error AbsoluteDifferenceConstraintViolated();
  error PriceUpdateWindowViolation();
  error InvalidRWAPrice();
  error ChainlinkRoundNotUpdated();
  error InvalidAddress();
}

{
  "evmVersion": "london",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs",
    "useLiteralContent": true
  },
  "optimizer": {
    "enabled": true,
    "runs": 100
  },
  "remappings": [],
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

• No Contract Security Audit Submitted- Submit Audit Here

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000000000000000000000000000000000000000000000005780786fae0599c00000000000000000000000000c04611c43842220fd941515f86d1dddb15f04e4600000000000000000000000000000000000000000000000000000000000000a0000000000000000000000000118919e891d0205a7492650ad32e727617fa9452000000000000000000000000118919e891d0205a7492650ad32e727617fa945200000000000000000000000000000000000000000000000000000000000000084f5553472f555344000000000000000000000000000000000000000000000000

-----Decoded View---------------
Arg [0] : _initialPrice (int256): 100882750390000000000
Arg [1] : _chainlinkOracle (address): 0xc04611C43842220fd941515F86d1DDdB15F04e46
Arg [2] : _description (string): OUSG/USD
Arg [3] : _admin (address): 0x118919e891D0205A7492650AD32E727617FA9452
Arg [4] : _setter (address): 0x118919e891D0205A7492650AD32E727617FA9452

-----Encoded View---------------
7 Constructor Arguments found :
Arg [0] : 000000000000000000000000000000000000000000000005780786fae0599c00
Arg [1] : 000000000000000000000000c04611c43842220fd941515f86d1dddb15f04e46
Arg [2] : 00000000000000000000000000000000000000000000000000000000000000a0
Arg [3] : 000000000000000000000000118919e891d0205a7492650ad32e727617fa9452
Arg [4] : 000000000000000000000000118919e891d0205a7492650ad32e727617fa9452
Arg [5] : 0000000000000000000000000000000000000000000000000000000000000008
Arg [6] : 4f5553472f555344000000000000000000000000000000000000000000000000