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// SPDX-License-Identifier: BUSL-1.1
pragma solidity 0.8.26;

import { IWstETH } from "../interfaces/IWstETH.sol";
import { PriceInfo } from "../interfaces/OracleMiddleware/IOracleMiddlewareTypes.sol";
import { IUsdnProtocolTypes as Types } from "../interfaces/UsdnProtocol/IUsdnProtocolTypes.sol";
import { OracleMiddleware } from "./OracleMiddleware.sol";

/**
 * @title Middleware Implementation For WstETH Price
 * @notice This contract is used to get the price of wstETH from the eth price oracle.
 */
contract WstEthOracleMiddleware is OracleMiddleware {
    /// @notice The wstETH contract.
    IWstETH internal immutable _wstEth;

    /**
     * @param pythContract The address of the Pyth contract.
     * @param pythPriceID The ID of the ETH Pyth price feed.
     * @param chainlinkPriceFeed The address of the ETH Chainlink price feed.
     * @param wstETH The address of the wstETH contract.
     * @param chainlinkTimeElapsedLimit The duration after which a Chainlink price is considered stale.
     */
    constructor(
        address pythContract,
        bytes32 pythPriceID,
        address chainlinkPriceFeed,
        address wstETH,
        uint256 chainlinkTimeElapsedLimit
    ) OracleMiddleware(pythContract, pythPriceID, chainlinkPriceFeed, chainlinkTimeElapsedLimit) {
        _wstEth = IWstETH(wstETH);
    }

    /**
     * @inheritdoc OracleMiddleware
     * @notice Parses and validates `data`, returns the corresponding price data by applying eth/wstETH ratio.
     * @dev The data format is specific to the middleware and is simply forwarded from the user transaction's calldata.
     * Wsteth price is calculated as follows: `ethPrice x stEthPerToken / 1 ether`.
     * A fee amounting to exactly {validationCost} (with the same `data` and `action`) must be sent or the transaction
     * will revert.
     * @param actionId A unique identifier for the current action. This identifier can be used to link an `Initiate`
     * call with the corresponding `Validate` call.
     * @param targetTimestamp The target timestamp for validating the price data. For validation actions, this is the
     * timestamp of the initiation.
     * @param action Type of action for which the price is requested. The middleware may use this to alter the
     * validation of the price or the returned price.
     * @param data The data to be used to communicate with oracles, the format varies from middleware to middleware and
     * can be different depending on the action.
     * @return result_ The price and timestamp as {IOracleMiddlewareTypes.PriceInfo}.
     */
    function parseAndValidatePrice(
        bytes32 actionId,
        uint128 targetTimestamp,
        Types.ProtocolAction action,
        bytes calldata data
    ) public payable virtual override returns (PriceInfo memory) {
        PriceInfo memory ethPrice = super.parseAndValidatePrice(actionId, targetTimestamp, action, data);
        uint256 stEthPerToken = _wstEth.stEthPerToken();

        return PriceInfo({
            price: ethPrice.price * stEthPerToken / 1 ether,
            neutralPrice: ethPrice.neutralPrice * stEthPerToken / 1 ether,
            timestamp: ethPrice.timestamp
        });
    }
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;

import { IERC20Metadata } from "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol";
import { IERC20Permit } from "@openzeppelin/contracts/token/ERC20/extensions/IERC20Permit.sol";

interface IWstETH is IERC20Metadata, IERC20Permit {
    /**
     * @notice Exchanges stETH to wstETH
     * @param _stETHAmount The amount of stETH to wrap in exchange for wstETH
     * @dev Requirements:
     *  - `_stETHAmount` must be non-zero
     *  - msg.sender must approve at least `_stETHAmount` stETH to this contract
     *  - msg.sender must have at least `_stETHAmount` of stETH
     * User should first approve `_stETHAmount` to the WstETH contract
     * @return Amount of wstETH user receives after wrap
     */
    function wrap(uint256 _stETHAmount) external returns (uint256);

    /**
     * @notice Exchanges wstETH to stETH
     * @param _wstETHAmount The amount of wstETH to unwrap in exchange for stETH
     * @dev Requirements:
     *  - `_wstETHAmount` must be non-zero
     *  - msg.sender must have at least `_wstETHAmount` wstETH
     * @return The amount of stETH user receives after unwrap
     */
    function unwrap(uint256 _wstETHAmount) external returns (uint256);

    /**
     * @notice Get the amount of wstETH for a given amount of stETH
     * @param _stETHAmount The amount of stETH
     * @return The amount of wstETH for a given stETH amount
     */
    function getWstETHByStETH(uint256 _stETHAmount) external view returns (uint256);

    /**
     * @notice Get the amount of stETH for a given amount of wstETH
     * @param _wstETHAmount The amount of wstETH
     * @return The amount of stETH for a given wstETH amount
     */
    function getStETHByWstETH(uint256 _wstETHAmount) external view returns (uint256);

    /**
     * @notice Get the amount of stETH for a one wstETH
     * @return The amount of stETH for 1 wstETH
     */
    function stEthPerToken() external view returns (uint256);

    /**
     * @notice Get the amount of wstETH for a one stETH
     * @return The amount of wstETH for a 1 stETH
     */
    function tokensPerStEth() external view returns (uint256);

    /**
     * @notice Get the address of stETH
     * @return The address of stETH
     */
    function stETH() external view returns (address);
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;

/**
 * @notice The price and timestamp returned by the oracle middleware.
 * @param price The validated asset price, potentially adjusted by the middleware.
 * @param neutralPrice The neutral/average price of the asset.
 * @param timestamp The timestamp of the price data.
 */
struct PriceInfo {
    uint256 price;
    uint256 neutralPrice;
    uint256 timestamp;
}

/**
 * @notice The price and timestamp returned by the Chainlink oracle.
 * @param price The asset price formatted by the middleware.
 * @param timestamp When the price was published on chain.
 */
struct ChainlinkPriceInfo {
    int256 price;
    uint256 timestamp;
}

/**
 * @notice Representation of a Pyth price with a uint256 price.
 * @param price The price of the asset.
 * @param conf The confidence interval around the price (in dollars, absolute value).
 * @param publishTime Unix timestamp describing when the price was published.
 */
struct FormattedPythPrice {
    uint256 price;
    uint256 conf;
    uint256 publishTime;
}

/**
 * @notice The price and timestamp returned by the Redstone oracle.
 * @param price The asset price formatted by the middleware.
 * @param timestamp The timestamp of the price data.
 */
struct RedstonePriceInfo {
    uint256 price;
    uint256 timestamp;
}

/**
 * @notice The different confidence interval of a Pyth price.
 * @dev Applied to the neutral price and available as `price`.
 * @param Up Adjusted price at the upper bound of the confidence interval.
 * @param Down Adjusted price at the lower bound of the confidence interval.
 * @param None Neutral price without adjustment.
 */
enum ConfidenceInterval {
    Up,
    Down,
    None
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;

import { IERC20Metadata } from "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol";
import { HugeUint } from "@smardex-solidity-libraries-1/HugeUint.sol";
import { LibBitmap } from "solady/src/utils/LibBitmap.sol";

import { DoubleEndedQueue } from "../../libraries/DoubleEndedQueue.sol";
import { IBaseLiquidationRewardsManager } from "../LiquidationRewardsManager/IBaseLiquidationRewardsManager.sol";
import { IBaseOracleMiddleware } from "../OracleMiddleware/IBaseOracleMiddleware.sol";
import { IBaseRebalancer } from "../Rebalancer/IBaseRebalancer.sol";
import { IUsdn } from "../Usdn/IUsdn.sol";

interface IUsdnProtocolTypes {
    /**
     * @notice All possible action types for the protocol.
     * @dev This is used for pending actions and to interact with the oracle middleware.
     * @param None No particular action.
     * @param Initialize The contract is being initialized.
     * @param InitiateDeposit Initiating a `deposit` action.
     * @param ValidateDeposit Validating a `deposit` action.
     * @param InitiateWithdrawal Initiating a `withdraw` action.
     * @param ValidateWithdrawal Validating a `withdraw` action.
     * @param InitiateOpenPosition Initiating an `open` position action.
     * @param ValidateOpenPosition Validating an `open` position action.
     * @param InitiateClosePosition Initiating a `close` position action.
     * @param ValidateClosePosition Validating a `close` position action.
     * @param Liquidation The price is requested for a liquidation action.
     */
    enum ProtocolAction {
        None,
        Initialize,
        InitiateDeposit,
        ValidateDeposit,
        InitiateWithdrawal,
        ValidateWithdrawal,
        InitiateOpenPosition,
        ValidateOpenPosition,
        InitiateClosePosition,
        ValidateClosePosition,
        Liquidation
    }

    /**
     * @notice The outcome of the call targeting a long position.
     * @param Processed The call did what it was supposed to do.
     * An initiate close has been completed / a pending action was validated.
     * @param Liquidated The position has been liquidated by this call.
     * @param PendingLiquidations The call cannot be completed because of pending liquidations.
     * Try calling the {IUsdnProtocolActions.liquidate} function with a fresh price to unblock the situation.
     */
    enum LongActionOutcome {
        Processed,
        Liquidated,
        PendingLiquidations
    }

    /**
     * @notice Classifies how far in its logic the {UsdnProtocolLongLibrary._triggerRebalancer} function made it to.
     * @dev Used to estimate the gas spent by the function call to more accurately calculate liquidation rewards.
     * @param None The rebalancer is not set.
     * @param NoImbalance The protocol imbalance is not reached.
     * @param PendingLiquidation The rebalancer position should be liquidated.
     * @param NoCloseNoOpen The action neither closes nor opens a position.
     * @param Closed The action only closes a position.
     * @param Opened The action only opens a position.
     * @param ClosedOpened The action closes and opens a position.
     */
    enum RebalancerAction {
        None,
        NoImbalance,
        PendingLiquidation,
        NoCloseNoOpen,
        Closed,
        Opened,
        ClosedOpened
    }

    /**
     * @notice Information about a long user position.
     * @param validated Whether the position was validated.
     * @param timestamp The timestamp of the position start.
     * @param user The user's address.
     * @param totalExpo The total exposure of the position (0 for vault deposits). The product of the initial
     * collateral and the initial leverage.
     * @param amount The amount of initial collateral in the position.
     */
    struct Position {
        bool validated; // 1 byte
        uint40 timestamp; // 5 bytes. Max 1_099_511_627_775 (36812-02-20 01:36:15)
        address user; // 20 bytes
        uint128 totalExpo; // 16 bytes. Max 340_282_366_920_938_463_463.374_607_431_768_211_455 ether
        uint128 amount; // 16 bytes
    }

    /**
     * @notice A pending action in the queue.
     * @param action The action type.
     * @param timestamp The timestamp of the initiate action.
     * @param var0 See {DepositPendingAction}, {WithdrawalPendingAction} and {LongPendingAction}.
     * @param to The target of the action.
     * @param validator The address that is supposed to validate the action.
     * @param securityDepositValue The security deposit of the pending action.
     * @param var1 See {DepositPendingAction}, {WithdrawalPendingAction} and {LongPendingAction}.
     * @param var2 See {DepositPendingAction}, {WithdrawalPendingAction} and {LongPendingAction}.
     * @param var3 See {DepositPendingAction}, {WithdrawalPendingAction} and {LongPendingAction}.
     * @param var4 See {DepositPendingAction}, {WithdrawalPendingAction} and {LongPendingAction}.
     * @param var5 See {DepositPendingAction}, {WithdrawalPendingAction} and {LongPendingAction}.
     * @param var6 See {DepositPendingAction}, {WithdrawalPendingAction} and {LongPendingAction}.
     * @param var7 See {DepositPendingAction}, {WithdrawalPendingAction} and {LongPendingAction}.
     */
    struct PendingAction {
        ProtocolAction action; // 1 byte
        uint40 timestamp; // 5 bytes
        uint24 var0; // 3 bytes
        address to; // 20 bytes
        address validator; // 20 bytes
        uint64 securityDepositValue; // 8 bytes
        int24 var1; // 3 bytes
        uint128 var2; // 16 bytes
        uint128 var3; // 16 bytes
        uint256 var4; // 32 bytes
        uint256 var5; // 32 bytes
        uint256 var6; // 32 bytes
        uint256 var7; // 32 bytes
    }

    /**
     * @notice A pending action in the queue for a vault deposit.
     * @param action The action type.
     * @param timestamp The timestamp of the initiate action.
     * @param feeBps Fee for the deposit, in BPS.
     * @param to The recipient of the funds.
     * @param validator The address that is supposed to validate the action.
     * @param securityDepositValue The security deposit of the pending action.
     * @param _unused Unused field to align the struct to `PendingAction`.
     * @param amount The amount of assets of the pending deposit.
     * @param assetPrice The price of the asset at the time of the last update.
     * @param totalExpo The total exposure at the time of the last update.
     * @param balanceVault The balance of the vault at the time of the last update.
     * @param balanceLong The balance of the long position at the time of the last update.
     * @param usdnTotalShares The total supply of USDN shares at the time of the action.
     */
    struct DepositPendingAction {
        ProtocolAction action; // 1 byte
        uint40 timestamp; // 5 bytes
        uint24 feeBps; // 3 bytes
        address to; // 20 bytes
        address validator; // 20 bytes
        uint64 securityDepositValue; // 8 bytes
        uint24 _unused; // 3 bytes
        uint128 amount; // 16 bytes
        uint128 assetPrice; // 16 bytes
        uint256 totalExpo; // 32 bytes
        uint256 balanceVault; // 32 bytes
        uint256 balanceLong; // 32 bytes
        uint256 usdnTotalShares; // 32 bytes
    }

    /**
     * @notice A pending action in the queue for a vault withdrawal.
     * @param action The action type.
     * @param timestamp The timestamp of the initiate action.
     * @param feeBps Fee for the withdrawal, in BPS.
     * @param to The recipient of the funds.
     * @param validator The address that is supposed to validate the action.
     * @param securityDepositValue The security deposit of the pending action.
     * @param sharesLSB 3 least significant bytes of the withdrawal shares amount (uint152).
     * @param sharesMSB 16 most significant bytes of the withdrawal shares amount (uint152).
     * @param assetPrice The price of the asset at the time of the last update.
     * @param totalExpo The total exposure at the time of the last update.
     * @param balanceVault The balance of the vault at the time of the last update.
     * @param balanceLong The balance of the long position at the time of the last update.
     * @param usdnTotalShares The total shares supply of USDN at the time of the action.
     */
    struct WithdrawalPendingAction {
        ProtocolAction action; // 1 byte
        uint40 timestamp; // 5 bytes
        uint24 feeBps; // 3 bytes
        address to; // 20 bytes
        address validator; // 20 bytes
        uint64 securityDepositValue; // 8 bytes
        uint24 sharesLSB; // 3 bytes
        uint128 sharesMSB; // 16 bytes
        uint128 assetPrice; // 16 bytes
        uint256 totalExpo; // 32 bytes
        uint256 balanceVault; // 32 bytes
        uint256 balanceLong; // 32 bytes
        uint256 usdnTotalShares; // 32 bytes
    }

    /**
     * @notice A pending action in the queue for a long position.
     * @param action The action type.
     * @param timestamp The timestamp of the initiate action.
     * @param closeLiqPenalty The liquidation penalty of the tick (only used when closing a position).
     * @param to The recipient of the position.
     * @param validator The address that is supposed to validate the action.
     * @param securityDepositValue The security deposit of the pending action.
     * @param tick The tick of the position.
     * @param closeAmount The portion of the initial position amount to close (only used when closing a position).
     * @param closePosTotalExpo The total expo of the position (only used when closing a position).
     * @param tickVersion The version of the tick.
     * @param index The index of the position in the tick list.
     * @param liqMultiplier A fixed precision representation of the liquidation multiplier (with
     * `LIQUIDATION_MULTIPLIER_DECIMALS` decimals) used to calculate the effective price for a given tick number.
     * @param closeBoundedPositionValue The amount that was removed from the long balance on
     * {IUsdnProtocolActions.initiateClosePosition} (only used when closing a position).
     */
    struct LongPendingAction {
        ProtocolAction action; // 1 byte
        uint40 timestamp; // 5 bytes
        uint24 closeLiqPenalty; // 3 bytes
        address to; // 20 bytes
        address validator; // 20 bytes
        uint64 securityDepositValue; // 8 bytes
        int24 tick; // 3 bytes
        uint128 closeAmount; // 16 bytes
        uint128 closePosTotalExpo; // 16 bytes
        uint256 tickVersion; // 32 bytes
        uint256 index; // 32 bytes
        uint256 liqMultiplier; // 32 bytes
        uint256 closeBoundedPositionValue; // 32 bytes
    }

    /**
     * @notice The data allowing to validate an actionable pending action.
     * @param priceData An array of bytes, each representing the data to be forwarded to the oracle middleware to
     * validate a pending action in the queue.
     * @param rawIndices An array of raw indices in the pending actions queue, in the same order as the corresponding
     * priceData.
     */
    struct PreviousActionsData {
        bytes[] priceData;
        uint128[] rawIndices;
    }

    /**
     * @notice Information of a liquidated tick.
     * @param totalPositions The total number of positions in the tick.
     * @param totalExpo The total expo of the tick.
     * @param remainingCollateral The remaining collateral after liquidation.
     * @param tickPrice The corresponding price.
     * @param priceWithoutPenalty The price without the liquidation penalty.
     */
    struct LiqTickInfo {
        uint256 totalPositions;
        uint256 totalExpo;
        int256 remainingCollateral;
        uint128 tickPrice;
        uint128 priceWithoutPenalty;
    }

    /**
     * @notice The effects of executed liquidations on the protocol.
     * @param liquidatedPositions The total number of liquidated positions.
     * @param remainingCollateral The remaining collateral after liquidation.
     * @param newLongBalance The new balance of the long side.
     * @param newVaultBalance The new balance of the vault side.
     * @param isLiquidationPending Whether some ticks are still populated above the current price (left to liquidate).
     * @param liquidatedTicks Information about the liquidated ticks.
     */
    struct LiquidationsEffects {
        uint256 liquidatedPositions;
        int256 remainingCollateral;
        uint256 newLongBalance;
        uint256 newVaultBalance;
        bool isLiquidationPending;
        LiqTickInfo[] liquidatedTicks;
    }

    /**
     * @notice Accumulator for tick data.
     * @param totalExpo The sum of the total expo of each position in the tick.
     * @param totalPos The number of positions in the tick.
     * @param liquidationPenalty The liquidation penalty for the positions in the tick.
     * @dev Since the liquidation penalty is a parameter that can be updated, we need to ensure that positions that get
     * created with a given penalty, use this penalty throughout their lifecycle. As such, once a tick gets populated by
     * a first position, it gets assigned the current liquidation penalty parameter value and can't use another value
     * until it gets liquidated or all positions exit the tick.
     */
    struct TickData {
        uint256 totalExpo;
        uint248 totalPos;
        uint24 liquidationPenalty;
    }

    /**
     * @notice The unique identifier for a long position.
     * @param tick The tick of the position.
     * @param tickVersion The version of the tick.
     * @param index The index of the position in the tick list.
     */
    struct PositionId {
        int24 tick;
        uint256 tickVersion;
        uint256 index;
    }

    /**
     * @notice Parameters for the internal {UsdnProtocolActionsLongLibrary._initiateOpenPosition} function.
     * @param user The address of the user initiating the open position.
     * @param to The address that will be the owner of the position.
     * @param validator The address that is supposed to validate the action.
     * @param amount The amount of assets to deposit.
     * @param desiredLiqPrice The desired liquidation price, including the liquidation penalty.
     * @param userMaxPrice The maximum price at which the position can be opened. The userMaxPrice is compared with the
     * price after confidence interval, penalty, etc...
     * @param userMaxLeverage The maximum leverage for the newly created position.
     * @param deadline The deadline of the open position to be initiated.
     * @param securityDepositValue The value of the security deposit for the newly created pending action.
     * @param currentPriceData The current price data (used to calculate the temporary leverage and entry price,
     * pending validation).
     */
    struct InitiateOpenPositionParams {
        address user;
        address to;
        address validator;
        uint128 amount;
        uint128 desiredLiqPrice;
        uint128 userMaxPrice;
        uint256 userMaxLeverage;
        uint256 deadline;
        uint64 securityDepositValue;
    }

    /**
     * @notice Parameters for the internal {UsdnProtocolLongLibrary._prepareInitiateOpenPosition} function.
     * @param validator The address that is supposed to validate the action.
     * @param amount The amount of assets to deposit.
     * @param desiredLiqPrice The desired liquidation price, including the liquidation penalty.
     * @param userMaxPrice The maximum price at which the position can be opened. The userMaxPrice is compared with the
     * price after confidence interval, penalty, etc...
     * @param userMaxLeverage The maximum leverage for the newly created position.
     * @param currentPriceData The current price data.
     */
    struct PrepareInitiateOpenPositionParams {
        address validator;
        uint128 amount;
        uint128 desiredLiqPrice;
        uint256 userMaxPrice;
        uint256 userMaxLeverage;
        bytes currentPriceData;
    }

    /**
     * @notice Parameters for the internal {UsdnProtocolActionsUtilsLibrary._prepareClosePositionData} function.
     * @param to The recipient of the funds.
     * @param validator The address that is supposed to validate the action.
     * @param posId The unique identifier of the position.
     * @param amountToClose The amount of collateral to remove from the position's amount.
     * @param userMinPrice The minimum price at which the position can be closed.
     * @param deadline The deadline until the position can be closed.
     * @param currentPriceData The current price data.
     * @param delegationSignature An EIP712 signature that proves the caller is authorized by the owner of the position
     * to close it on their behalf.
     * @param domainSeparatorV4 The domain separator v4.
     */
    struct PrepareInitiateClosePositionParams {
        address to;
        address validator;
        PositionId posId;
        uint128 amountToClose;
        uint256 userMinPrice;
        uint256 deadline;
        bytes currentPriceData;
        bytes delegationSignature;
        bytes32 domainSeparatorV4;
    }

    /**
     * @notice Parameters for the internal {UsdnProtocolActionsLongLibrary._initiateClosePosition} function.
     * @param to The recipient of the funds.
     * @param validator The address that is supposed to validate the action.
     * @param posId The unique identifier of the position.
     * @param amountToClose The amount to close.
     * @param userMinPrice The minimum price at which the position can be closed.
     * @param deadline The deadline of the close position to be initiated.
     * @param securityDepositValue The value of the security deposit for the newly created pending action.
     * @param domainSeparatorV4 The domain separator v4 for EIP712 signature.
     */
    struct InitiateClosePositionParams {
        address to;
        address payable validator;
        uint256 deadline;
        PositionId posId;
        uint128 amountToClose;
        uint256 userMinPrice;
        uint64 securityDepositValue;
        bytes32 domainSeparatorV4;
    }

    /**
     * @dev Structure to hold the transient data during {UsdnProtocolActionsLongLibrary._initiateClosePosition}
     * @param pos The position to close.
     * @param liquidationPenalty The liquidation penalty.
     * @param totalExpoToClose The total expo to close.
     * @param lastPrice The price after the last balances update.
     * @param tempPositionValue The bounded value of the position that was removed from the long balance.
     * @param longTradingExpo The long trading expo.
     * @param liqMulAcc The liquidation multiplier accumulator.
     * @param isLiquidationPending Whether some ticks are still populated above the current price (left to liquidate).
     */
    struct ClosePositionData {
        Position pos;
        uint24 liquidationPenalty;
        uint128 totalExpoToClose;
        uint128 lastPrice;
        uint256 tempPositionValue;
        uint256 longTradingExpo;
        HugeUint.Uint512 liqMulAcc;
        bool isLiquidationPending;
    }

    /**
     * @dev Structure to hold the transient data during {UsdnProtocolActionsLongLibrary._validateOpenPosition}.
     * @param action The long pending action.
     * @param startPrice The new entry price of the position.
     * @param lastPrice The price of the last balances update.
     * @param tickHash The tick hash.
     * @param pos The position object.
     * @param liqPriceWithoutPenaltyNorFunding The liquidation price without penalty nor funding used to calculate the
     * user leverage and the new total expo.
     * @param liqPriceWithoutPenalty The new liquidation price without penalty.
     * @param leverage The new leverage.
     * @param oldPosValue The value of the position according to the old entry price and the _lastPrice.
     * @param liquidationPenalty The liquidation penalty for the position's tick.
     * @param isLiquidationPending Whether some ticks are still populated above the current price (left to liquidate).
     */
    struct ValidateOpenPositionData {
        LongPendingAction action;
        uint128 startPrice;
        uint128 lastPrice;
        bytes32 tickHash;
        Position pos;
        uint128 liqPriceWithoutPenaltyNorFunding;
        uint128 liqPriceWithoutPenalty;
        uint256 leverage;
        uint256 oldPosValue;
        uint24 liquidationPenalty;
        bool isLiquidationPending;
    }

    /**
     * @dev Structure to hold the transient data during {UsdnProtocolActionsLongLibrary._initiateOpenPosition}.
     * @param adjustedPrice The adjusted price with position fees applied.
     * @param posId The unique identifier of the position.
     * @param liquidationPenalty The liquidation penalty.
     * @param positionTotalExpo The total expo of the position. The product of the initial collateral and the initial
     * leverage.
     * @param positionValue The value of the position, taking into account the position fee.
     * @param liqMultiplier The liquidation multiplier represented with fixed precision.
     * @param isLiquidationPending Whether some ticks are still populated above the current price (left to liquidate).
     */
    struct InitiateOpenPositionData {
        uint128 adjustedPrice;
        PositionId posId;
        uint24 liquidationPenalty;
        uint128 positionTotalExpo;
        uint256 positionValue;
        uint256 liqMultiplier;
        bool isLiquidationPending;
    }

    /**
     * @notice Structure to hold the state of the protocol.
     * @param totalExpo The long total expo.
     * @param tradingExpo The long trading expo.
     * @param longBalance The long balance.
     * @param vaultBalance The vault balance.
     * @param liqMultiplierAccumulator The liquidation multiplier accumulator.
     */
    struct CachedProtocolState {
        uint256 totalExpo;
        uint256 tradingExpo;
        uint256 longBalance;
        uint256 vaultBalance;
        HugeUint.Uint512 liqMultiplierAccumulator;
    }

    /**
     * @notice Structure to hold transient data during the {UsdnProtocolActionsLongLibrary._calcRebalancerPositionTick}
     * function.
     * @param protocolMaxLeverage The protocol maximum leverage.
     * @param longImbalanceTargetBps The long imbalance target in basis points.
     * @param tradingExpoToFill The trading expo to fill.
     * @param highestUsableTradingExpo The highest usable trading expo.
     * @param currentLiqPenalty The current liquidation penalty.
     * @param liqPriceWithoutPenalty The liquidation price without penalty.
     */
    struct CalcRebalancerPositionTickData {
        uint256 protocolMaxLeverage;
        int256 longImbalanceTargetBps;
        uint256 tradingExpoToFill;
        uint256 highestUsableTradingExpo;
        uint24 currentLiqPenalty;
        uint128 liqPriceWithoutPenalty;
    }

    /**
     * @notice Structure to hold the return values of the {UsdnProtocolActionsLongLibrary._calcRebalancerPositionTick}
     * function.
     * @param tick The tick of the rebalancer position, includes liquidation penalty.
     * @param totalExpo The total expo of the rebalancer position.
     * @param liquidationPenalty The liquidation penalty of the tick.
     */
    struct RebalancerPositionData {
        int24 tick;
        uint128 totalExpo;
        uint24 liquidationPenalty;
    }

    /**
     * @notice Data structure for the {UsdnProtocolCoreLibrary._applyPnlAndFunding} function.
     * @param tempLongBalance The new balance of the long side, could be negative (temporarily).
     * @param tempVaultBalance The new balance of the vault side, could be negative (temporarily).
     * @param lastPrice The last price.
     */
    struct ApplyPnlAndFundingData {
        int256 tempLongBalance;
        int256 tempVaultBalance;
        uint128 lastPrice;
    }

    /**
     * @notice Data structure for tick to price conversion functions.
     * @param tradingExpo The long side trading expo.
     * @param accumulator The liquidation multiplier accumulator.
     * @param tickSpacing The tick spacing.
     */
    struct TickPriceConversionData {
        uint256 tradingExpo;
        HugeUint.Uint512 accumulator;
        int24 tickSpacing;
    }

    /**
     * @custom:storage-location erc7201:UsdnProtocol.storage.main.
     * @notice Structure to hold the state of the protocol.
     * @param _tickSpacing The liquidation tick spacing for storing long positions.
     * A tick spacing of 1 is equivalent to a 0.01% increase in liquidation price between ticks. A tick spacing of
     * 100 is equivalent to a ~1.005% increase in liquidation price between ticks.
     * @param _asset The asset ERC20 contract.
     * Assets with a blacklist are not supported because the protocol would be DoS if transfers revert.
     * @param _assetDecimals The number of decimals used by the `_asset`.
     * @param _priceFeedDecimals The price feed decimals (18).
     * @param _usdn The USDN ERC20 contract.
     * @param _sdex The SDEX ERC20 contract.
     * @param _usdnMinDivisor The minimum divisor for USDN.
     * @param _oracleMiddleware The oracle middleware contract.
     * @param _liquidationRewardsManager The liquidation rewards manager contract.
     * @param _rebalancer The rebalancer contract.
     * @param _isRebalancer Whether an address is or has been a rebalancer.
     * @param _minLeverage The minimum leverage for a position.
     * @param _maxLeverage The maximum leverage for a position.
     * @param _lowLatencyValidatorDeadline The deadline for a user to confirm their action with a low-latency oracle.
     * After this deadline, any user can validate the action with the low-latency oracle until the
     * OracleMiddleware's _lowLatencyDelay. This is an offset compared to the timestamp of the initiate action.
     * @param _onChainValidatorDeadline The deadline for a user to confirm their action with an on-chain oracle.
     * After this deadline, any user can validate the action with the on-chain oracle. This is an offset compared
     * to the timestamp of the initiate action + the oracle middleware's _lowLatencyDelay.
     * @param _safetyMarginBps Safety margin for the liquidation price of newly open positions, in basis points.
     * @param _liquidationIteration The number of iterations to perform during the user's action (in tick).
     * @param _protocolFeeBps The protocol fee in basis points.
     * @param _rebalancerBonusBps Part of the remaining collateral that is given as a bonus to the Rebalancer upon
     * liquidation of a tick, in basis points. The rest is sent to the Vault balance.
     * @param _liquidationPenalty The liquidation penalty (in ticks).
     * @param _EMAPeriod The moving average period of the funding rate.
     * @param _fundingSF The scaling factor (SF) of the funding rate.
     * @param _feeThreshold The threshold above which the fee will be sent.
     * @param _openExpoImbalanceLimitBps The imbalance limit of the long expo for open actions (in basis points).
     * As soon as the difference between the vault expo and the long expo exceeds this basis point limit in favor
     * of long the open rebalancing mechanism is triggered, preventing the opening of a new long position.
     * @param _withdrawalExpoImbalanceLimitBps The imbalance limit of the long expo for withdrawal actions (in basis
     * points). As soon as the difference between vault expo and long expo exceeds this basis point limit in favor of
     * long, the withdrawal rebalancing mechanism is triggered, preventing the withdrawal of the existing vault
     * position.
     * @param _depositExpoImbalanceLimitBps The imbalance limit of the vault expo for deposit actions (in basis points).
     * As soon as the difference between the vault expo and the long expo exceeds this basis point limit in favor
     * of the vault, the deposit vault rebalancing mechanism is triggered, preventing the opening of a new vault
     * position.
     * @param _closeExpoImbalanceLimitBps The imbalance limit of the vault expo for close actions (in basis points).
     * As soon as the difference between the vault expo and the long expo exceeds this basis point limit in favor
     * of the vault, the close rebalancing mechanism is triggered, preventing the close of an existing long position.
     * @param _rebalancerCloseExpoImbalanceLimitBps The imbalance limit of the vault expo for close actions from the
     * rebalancer (in basis points). As soon as the difference between the vault expo and the long expo exceeds this
     * basis point limit in favor of the vault, the close rebalancing mechanism is triggered, preventing the close of an
     * existing long position from the rebalancer contract.
     * @param _longImbalanceTargetBps The target imbalance on the long side (in basis points)
     * This value will be used to calculate how much of the missing trading expo the rebalancer position will try
     * to compensate. A negative value means the rebalancer will compensate enough to go above the equilibrium. A
     * positive value means the rebalancer will compensate but stay below the equilibrium.
     * @param _positionFeeBps The position fee in basis points.
     * @param _vaultFeeBps The fee for vault deposits and withdrawals, in basis points.
     * @param _sdexRewardsRatioBps The ratio of SDEX rewards to send to the user (in basis points).
     * @param _sdexBurnOnDepositRatio The ratio of USDN to SDEX tokens to burn on deposit.
     * @param _feeCollector The fee collector's address.
     * @param _securityDepositValue The deposit required for a new position.
     * @param _targetUsdnPrice The nominal (target) price of USDN (with _priceFeedDecimals).
     * @param _usdnRebaseThreshold The USDN price threshold to trigger a rebase (with _priceFeedDecimals).
     * @param _minLongPosition The minimum long position size (with `_assetDecimals`).
     * @param _lastFundingPerDay The funding rate calculated at the last update timestamp.
     * @param _lastPrice The price of the asset during the last balances update (with price feed decimals).
     * @param _lastUpdateTimestamp The timestamp of the last balances update.
     * @param _pendingProtocolFee The pending protocol fee accumulator.
     * @param _pendingActions The pending actions by the user (1 per user max).
     * The value stored is an index into the `pendingActionsQueue` deque, shifted by one. A value of 0 means no
     * pending action. Since the deque uses uint128 indices, the highest index will not overflow when adding one.
     * @param _pendingActionsQueue The queue of pending actions.
     * @param _balanceVault The balance of deposits (with `_assetDecimals`).
     * @param _pendingBalanceVault The unreflected balance change due to pending vault actions (with `_assetDecimals`).
     * @param _EMA The exponential moving average of the funding (0.0003 at initialization).
     * @param _balanceLong The balance of long positions (with `_assetDecimals`).
     * @param _totalExpo The total exposure of the long positions (with `_assetDecimals`).
     * @param _liqMultiplierAccumulator The accumulator used to calculate the liquidation multiplier.
     * This is the sum, for all ticks, of the total expo of positions inside the tick, multiplied by the
     * unadjusted price of the tick which is `_tickData[tickHash].liquidationPenalty` below
     * The unadjusted price is obtained with `TickMath.getPriceAtTick.
     * @param _tickVersion The liquidation tick version.
     * @param _longPositions The long positions per versioned tick (liquidation price).
     * @param _tickData Accumulated data for a given tick and tick version.
     * @param _highestPopulatedTick The highest tick with a position.
     * @param _totalLongPositions Cache of the total long positions count.
     * @param _tickBitmap The bitmap used to quickly find populated ticks.
     * @param _protocolFallbackAddr The address of the fallback contract.
     * @param _nonce The user EIP712 nonce.
     */
    struct Storage {
        // immutable
        int24 _tickSpacing;
        IERC20Metadata _asset;
        uint8 _assetDecimals;
        uint8 _priceFeedDecimals;
        IUsdn _usdn;
        IERC20Metadata _sdex;
        uint256 _usdnMinDivisor;
        // parameters
        IBaseOracleMiddleware _oracleMiddleware;
        IBaseLiquidationRewardsManager _liquidationRewardsManager;
        IBaseRebalancer _rebalancer;
        mapping(address => bool) _isRebalancer;
        uint256 _minLeverage;
        uint256 _maxLeverage;
        uint128 _lowLatencyValidatorDeadline;
        uint128 _onChainValidatorDeadline;
        uint256 _safetyMarginBps;
        uint16 _liquidationIteration;
        uint16 _protocolFeeBps;
        uint16 _rebalancerBonusBps;
        uint24 _liquidationPenalty;
        uint128 _EMAPeriod;
        uint256 _fundingSF;
        uint256 _feeThreshold;
        int256 _openExpoImbalanceLimitBps;
        int256 _withdrawalExpoImbalanceLimitBps;
        int256 _depositExpoImbalanceLimitBps;
        int256 _closeExpoImbalanceLimitBps;
        int256 _rebalancerCloseExpoImbalanceLimitBps;
        int256 _longImbalanceTargetBps;
        uint16 _positionFeeBps;
        uint16 _vaultFeeBps;
        uint16 _sdexRewardsRatioBps;
        uint32 _sdexBurnOnDepositRatio;
        address _feeCollector;
        uint64 _securityDepositValue;
        uint128 _targetUsdnPrice;
        uint128 _usdnRebaseThreshold;
        uint256 _minLongPosition;
        // state
        int256 _lastFundingPerDay;
        uint128 _lastPrice;
        uint128 _lastUpdateTimestamp;
        uint256 _pendingProtocolFee;
        // pending actions queue
        mapping(address => uint256) _pendingActions;
        DoubleEndedQueue.Deque _pendingActionsQueue;
        // vault
        uint256 _balanceVault;
        int256 _pendingBalanceVault;
        // long positions
        int256 _EMA;
        uint256 _balanceLong;
        uint256 _totalExpo;
        HugeUint.Uint512 _liqMultiplierAccumulator;
        mapping(int24 => uint256) _tickVersion;
        mapping(bytes32 => Position[]) _longPositions;
        mapping(bytes32 => TickData) _tickData;
        int24 _highestPopulatedTick;
        uint256 _totalLongPositions;
        LibBitmap.Bitmap _tickBitmap;
        // fallback
        address _protocolFallbackAddr;
        // EIP712
        mapping(address => uint256) _nonce;
    }
}

// SPDX-License-Identifier: BUSL-1.1
pragma solidity 0.8.26;

import { AccessControlDefaultAdminRules } from
    "@openzeppelin/contracts/access/extensions/AccessControlDefaultAdminRules.sol";

import { IBaseOracleMiddleware } from "../interfaces/OracleMiddleware/IBaseOracleMiddleware.sol";
import { IOracleMiddleware } from "../interfaces/OracleMiddleware/IOracleMiddleware.sol";
import {
    ChainlinkPriceInfo,
    ConfidenceInterval,
    FormattedPythPrice,
    PriceInfo
} from "../interfaces/OracleMiddleware/IOracleMiddlewareTypes.sol";
import { IUsdnProtocol } from "../interfaces/UsdnProtocol/IUsdnProtocol.sol";
import { IUsdnProtocolTypes as Types } from "../interfaces/UsdnProtocol/IUsdnProtocolTypes.sol";
import { ChainlinkOracle } from "./oracles/ChainlinkOracle.sol";
import { PythOracle } from "./oracles/PythOracle.sol";

/**
 * @title Middleware Between Oracles And The USDN Protocol
 * @notice This contract is used to get the price of an asset from different oracles.
 * It is used by the USDN protocol to get the price of the USDN underlying asset.
 */
contract OracleMiddleware is IOracleMiddleware, PythOracle, ChainlinkOracle, AccessControlDefaultAdminRules {
    /// @inheritdoc IOracleMiddleware
    uint16 public constant BPS_DIVISOR = 10_000;

    /// @inheritdoc IOracleMiddleware
    uint16 public constant MAX_CONF_RATIO = BPS_DIVISOR * 2;

    /// @notice The number of decimals for the returned price.
    uint8 internal constant MIDDLEWARE_DECIMALS = 18;

    /// @inheritdoc IOracleMiddleware
    bytes32 public constant ADMIN_ROLE = keccak256("ADMIN_ROLE");

    /**
     * @notice The delay (in seconds) between the moment an action is initiated and the timestamp of the
     * price data used to validate that action.
     */
    uint256 internal _validationDelay = 24 seconds;

    /// @notice Ratio to applied to the Pyth confidence interval (in basis points).
    uint16 internal _confRatioBps = 4000; // to divide by BPS_DIVISOR

    /**
     * @notice The amount of time during which a low latency oracle price validation is available.
     * @dev This value should be greater than or equal to `_lowLatencyValidatorDeadline` of the USDN protocol.
     */
    uint16 internal _lowLatencyDelay = 20 minutes;

    /**
     * @param pythContract Address of the Pyth contract.
     * @param pythFeedId The Pyth price feed ID for the asset.
     * @param chainlinkPriceFeed Address of the Chainlink price feed.
     * @param chainlinkTimeElapsedLimit The duration after which a Chainlink price is considered stale.
     */
    constructor(address pythContract, bytes32 pythFeedId, address chainlinkPriceFeed, uint256 chainlinkTimeElapsedLimit)
        PythOracle(pythContract, pythFeedId)
        ChainlinkOracle(chainlinkPriceFeed, chainlinkTimeElapsedLimit)
        AccessControlDefaultAdminRules(0, msg.sender)
    {
        _grantRole(ADMIN_ROLE, msg.sender);
    }

    /* -------------------------------------------------------------------------- */
    /*                           Public view functions                            */
    /* -------------------------------------------------------------------------- */

    /// @inheritdoc IBaseOracleMiddleware
    function parseAndValidatePrice(bytes32, uint128 targetTimestamp, Types.ProtocolAction action, bytes calldata data)
        public
        payable
        virtual
        returns (PriceInfo memory price_)
    {
        if (action == Types.ProtocolAction.None) {
            return
                _getLowLatencyPrice(data, targetTimestamp, ConfidenceInterval.None, targetTimestamp + _lowLatencyDelay);
        } else if (action == Types.ProtocolAction.Initialize) {
            return _getInitiateActionPrice(data, ConfidenceInterval.None);
        } else if (action == Types.ProtocolAction.ValidateDeposit) {
            // use the lowest price in the confidence interval to ensure a minimum benefit for the user in case
            // of price inaccuracies until low latency delay is exceeded then use chainlink specified roundId
            return _getValidateActionPrice(data, targetTimestamp, ConfidenceInterval.Down);
        } else if (action == Types.ProtocolAction.ValidateWithdrawal) {
            // use the highest price in the confidence interval to ensure a minimum benefit for the user in case
            // of price inaccuracies until low latency delay is exceeded then use chainlink specified roundId
            return _getValidateActionPrice(data, targetTimestamp, ConfidenceInterval.Up);
        } else if (action == Types.ProtocolAction.ValidateOpenPosition) {
            // use the highest price in the confidence interval to ensure a minimum benefit for the user in case
            // of price inaccuracies until low latency delay is exceeded then use chainlink specified roundId
            return _getValidateActionPrice(data, targetTimestamp, ConfidenceInterval.Up);
        } else if (action == Types.ProtocolAction.ValidateClosePosition) {
            // use the lowest price in the confidence interval to ensure a minimum benefit for the user in case
            // of price inaccuracies until low latency delay is exceeded then use chainlink specified roundId
            return _getValidateActionPrice(data, targetTimestamp, ConfidenceInterval.Down);
        } else if (action == Types.ProtocolAction.Liquidation) {
            // special case, if we pass a timestamp of zero, then we accept all prices newer than
            // `_pythRecentPriceDelay`
            return _getLowLatencyPrice(data, 0, ConfidenceInterval.None, 0);
        } else if (action == Types.ProtocolAction.InitiateDeposit) {
            // if the user chooses to initiate with pyth, the neutral price will be used so no confidence is needed
            return _getInitiateActionPrice(data, ConfidenceInterval.None);
        } else if (action == Types.ProtocolAction.InitiateWithdrawal) {
            // if the user chooses to initiate with pyth, the neutral price will be used so no confidence is needed
            return _getInitiateActionPrice(data, ConfidenceInterval.None);
        } else if (action == Types.ProtocolAction.InitiateOpenPosition) {
            // if the user chooses to initiate with pyth, the neutral price will be used so no confidence is needed
            return _getInitiateActionPrice(data, ConfidenceInterval.None);
        } else if (action == Types.ProtocolAction.InitiateClosePosition) {
            // if the user chooses to initiate with pyth, the neutral price will be used so no confidence is needed
            return _getInitiateActionPrice(data, ConfidenceInterval.None);
        }
    }

    /// @inheritdoc IBaseOracleMiddleware
    function getValidationDelay() external view returns (uint256 delay_) {
        return _validationDelay;
    }

    /// @inheritdoc IBaseOracleMiddleware
    function getDecimals() external pure returns (uint8 decimals_) {
        return MIDDLEWARE_DECIMALS;
    }

    /// @inheritdoc IOracleMiddleware
    function getConfRatioBps() external view returns (uint16 ratio_) {
        return _confRatioBps;
    }

    /// @inheritdoc IBaseOracleMiddleware
    function getLowLatencyDelay() external view returns (uint16 delay_) {
        return _lowLatencyDelay;
    }

    /// @inheritdoc IBaseOracleMiddleware
    function validationCost(bytes calldata data, Types.ProtocolAction) public view virtual returns (uint256 result_) {
        if (_isPythData(data)) {
            result_ = _getPythUpdateFee(data);
        }
    }

    /* -------------------------------------------------------------------------- */
    /*                             Internal functions                             */
    /* -------------------------------------------------------------------------- */

    /**
     * @notice Gets the price from the low-latency oracle (Pyth).
     * @param data The signed price update data.
     * @param actionTimestamp The timestamp of the action corresponding to the price. If zero, then we must accept all
     * prices younger than {PythOracle._pythRecentPriceDelay}.
     * @param dir The direction for the confidence interval adjusted price.
     * @param targetLimit The most recent timestamp a price can have (can be zero if `actionTimestamp` is zero).
     * @return price_ The price from the low-latency oracle, adjusted according to the confidence interval direction.
     */
    function _getLowLatencyPrice(
        bytes calldata data,
        uint128 actionTimestamp,
        ConfidenceInterval dir,
        uint128 targetLimit
    ) internal virtual returns (PriceInfo memory price_) {
        // if actionTimestamp is 0 we're performing a liquidation and we don't add the validation delay
        if (actionTimestamp > 0) {
            // add the validation delay to the action timestamp to get the timestamp of the price data used to
            // validate
            actionTimestamp += uint128(_validationDelay);
        }

        FormattedPythPrice memory pythPrice =
            _getFormattedPythPrice(data, actionTimestamp, MIDDLEWARE_DECIMALS, targetLimit);
        price_ = _adjustPythPrice(pythPrice, dir);
    }

    /**
     * @notice Gets the price for an `initiate` action of the protocol.
     * @dev If the data parameter is not empty, validate the price with {PythOracle}. Else, get the on-chain price from
     * {ChainlinkOracle} and compare its timestamp with the latest seen Pyth price (cached). If Pyth is more recent, we
     * return it. Otherwise, we return the Chainlink price. For the latter, we don't have a confidence interval, so both
     * `neutralPrice` and `price` are equal.
     * @param data An optional VAA from Pyth.
     * @param dir The direction when applying the confidence interval (when using a Pyth price).
     * @return price_ The price to use for the user action.
     */
    function _getInitiateActionPrice(bytes calldata data, ConfidenceInterval dir)
        internal
        returns (PriceInfo memory price_)
    {
        // if data is not empty, use pyth
        if (data.length > 0) {
            // since we use this function for `initiate` type actions which pass `targetTimestamp = block.timestamp`,
            // we should pass `0` to the function below to signal that we accept any recent price
            return _getLowLatencyPrice(data, 0, dir, 0);
        }

        // chainlink calls do not require a fee
        if (msg.value > 0) {
            revert OracleMiddlewareIncorrectFee();
        }

        ChainlinkPriceInfo memory chainlinkOnChainPrice = _getFormattedChainlinkLatestPrice(MIDDLEWARE_DECIMALS);

        // check if the cached pyth price is more recent and return it instead
        FormattedPythPrice memory latestPythPrice = _getLatestStoredPythPrice(MIDDLEWARE_DECIMALS);
        if (chainlinkOnChainPrice.timestamp <= latestPythPrice.publishTime) {
            // we use the same price age limit as for chainlink here
            if (latestPythPrice.publishTime < block.timestamp - _timeElapsedLimit) {
                revert OracleMiddlewarePriceTooOld(latestPythPrice.publishTime);
            }
            return _adjustPythPrice(latestPythPrice, dir);
        }

        // if the price equals PRICE_TOO_OLD then the tolerated time elapsed for price validity was exceeded, revert
        if (chainlinkOnChainPrice.price == PRICE_TOO_OLD) {
            revert OracleMiddlewarePriceTooOld(chainlinkOnChainPrice.timestamp);
        }

        // if the price is negative or zero, revert
        if (chainlinkOnChainPrice.price <= 0) {
            revert OracleMiddlewareWrongPrice(chainlinkOnChainPrice.price);
        }

        price_ = PriceInfo({
            price: uint256(chainlinkOnChainPrice.price),
            neutralPrice: uint256(chainlinkOnChainPrice.price),
            timestamp: chainlinkOnChainPrice.timestamp
        });
    }

    /**
     * @notice Applies the confidence interval in the `dir` direction, scaled by the configured {_confRatioBps}.
     * @param pythPrice The formatted Pyth price object.
     * @param dir The direction of the confidence interval to apply.
     * @return price_ The adjusted price according to the confidence interval and confidence ratio.
     */
    function _adjustPythPrice(FormattedPythPrice memory pythPrice, ConfidenceInterval dir)
        internal
        view
        returns (PriceInfo memory price_)
    {
        if (dir == ConfidenceInterval.Down) {
            uint256 adjust = (pythPrice.conf * _confRatioBps) / BPS_DIVISOR;
            if (adjust >= pythPrice.price) {
                // avoid underflow or zero price due to confidence interval adjustment
                price_.price = 1;
            } else {
                // strictly positive
                unchecked {
                    price_.price = pythPrice.price - adjust;
                }
            }
        } else if (dir == ConfidenceInterval.Up) {
            price_.price = pythPrice.price + ((pythPrice.conf * _confRatioBps) / BPS_DIVISOR);
        } else {
            price_.price = pythPrice.price;
        }

        price_.timestamp = pythPrice.publishTime;
        price_.neutralPrice = pythPrice.price;
    }

    /**
     * @notice Gets the price for a validate action of the protocol.
     * @dev If the low latency delay is not exceeded, validate the price with the low-latency oracle(s).
     * Else, get the specified roundId on-chain price from Chainlink. In case of chainlink price,
     * we don't have a confidence interval and so both `neutralPrice` and `price` are equal.
     * @param data An optional VAA from Pyth or a chainlink roundId (abi-encoded uint80).
     * @param targetTimestamp The timestamp of the initiate action.
     * @param dir The direction for applying the confidence interval (in case we use a Pyth price).
     * @return price_ The price to use for the user action.
     */
    function _getValidateActionPrice(bytes calldata data, uint128 targetTimestamp, ConfidenceInterval dir)
        internal
        returns (PriceInfo memory price_)
    {
        uint128 targetLimit = targetTimestamp + _lowLatencyDelay;
        if (block.timestamp <= targetLimit) {
            return _getLowLatencyPrice(data, targetTimestamp, dir, targetLimit);
        }

        // chainlink calls do not require a fee
        if (msg.value > 0) {
            revert OracleMiddlewareIncorrectFee();
        }

        uint80 validateRoundId = abi.decode(data, (uint80));

        // check that the round ID is valid and get its price data
        ChainlinkPriceInfo memory chainlinkOnChainPrice = _validateChainlinkRoundId(targetLimit, validateRoundId);

        price_ = PriceInfo({
            price: uint256(chainlinkOnChainPrice.price),
            neutralPrice: uint256(chainlinkOnChainPrice.price),
            timestamp: chainlinkOnChainPrice.timestamp
        });
    }

    /**
     * @notice Checks that the given round ID is valid and returns its corresponding price data.
     * @dev Round IDs are not necessarily consecutive, so additional computing can be necessary to find
     * the previous round ID.
     * @param targetLimit The timestamp of the initiate action + {_lowLatencyDelay}.
     * @param roundId The round ID to validate.
     * @return providedRoundPrice_ The price data of the provided round ID.
     */
    function _validateChainlinkRoundId(uint128 targetLimit, uint80 roundId)
        internal
        view
        returns (ChainlinkPriceInfo memory providedRoundPrice_)
    {
        providedRoundPrice_ = _getFormattedChainlinkPrice(MIDDLEWARE_DECIMALS, roundId);

        if (providedRoundPrice_.price <= 0) {
            revert OracleMiddlewareWrongPrice(providedRoundPrice_.price);
        }

        (,,, uint256 previousRoundTimestamp,) = _priceFeed.getRoundData(roundId - 1);

        // if the provided round's timestamp is 0, it's possible the aggregator recently changed and there is no data
        // available for the previous round ID in the aggregator. In that case, we accept the given round ID as the
        // sole reference with additional checks to make sure it is not too far from the target timestamp
        if (previousRoundTimestamp == 0) {
            // calculate the provided round's phase ID
            uint80 roundPhaseId = roundId >> 64;
            // calculate the first valid round ID for this phase
            uint80 firstRoundId = (roundPhaseId << 64) + 1;
            // the provided round ID must be the first round ID of the phase, if not, revert
            if (firstRoundId != roundId) {
                revert OracleMiddlewareInvalidRoundId();
            }

            // make sure that the provided round ID is not newer than it should be
            if (providedRoundPrice_.timestamp > targetLimit + _timeElapsedLimit) {
                revert OracleMiddlewareInvalidRoundId();
            }
        } else if (previousRoundTimestamp > targetLimit) {
            // previous round should precede targetLimit
            revert OracleMiddlewareInvalidRoundId();
        }

        if (providedRoundPrice_.timestamp <= targetLimit) {
            revert OracleMiddlewareInvalidRoundId();
        }
    }

    /**
     * @notice Checks if the passed calldata corresponds to a Pyth message.
     * @param data The calldata pointer to the message.
     * @return isPythData_ Whether the data is a valid Pyth message or not.
     */
    function _isPythData(bytes calldata data) internal pure returns (bool isPythData_) {
        if (data.length <= 32) {
            return false;
        }
        // check the first 4 bytes of the data to identify a pyth message
        uint32 magic;
        assembly {
            magic := shr(224, calldataload(data.offset))
        }
        // Pyth magic stands for PNAU (Pyth Network Accumulator Update)
        return magic == 0x504e4155;
    }

    /* -------------------------------------------------------------------------- */
    /*                            Privileged functions                            */
    /* -------------------------------------------------------------------------- */

    /// @inheritdoc IOracleMiddleware
    function setValidationDelay(uint256 newValidationDelay) external onlyRole(ADMIN_ROLE) {
        _validationDelay = newValidationDelay;

        emit ValidationDelayUpdated(newValidationDelay);
    }

    /// @inheritdoc IOracleMiddleware
    function setChainlinkTimeElapsedLimit(uint256 newTimeElapsedLimit) external onlyRole(ADMIN_ROLE) {
        _timeElapsedLimit = newTimeElapsedLimit;

        emit TimeElapsedLimitUpdated(newTimeElapsedLimit);
    }

    /// @inheritdoc IOracleMiddleware
    function setPythRecentPriceDelay(uint64 newDelay) external onlyRole(ADMIN_ROLE) {
        if (newDelay < 10 seconds) {
            revert OracleMiddlewareInvalidRecentPriceDelay(newDelay);
        }
        if (newDelay > 10 minutes) {
            revert OracleMiddlewareInvalidRecentPriceDelay(newDelay);
        }
        _pythRecentPriceDelay = newDelay;

        emit PythRecentPriceDelayUpdated(newDelay);
    }

    /// @inheritdoc IOracleMiddleware
    function setConfRatio(uint16 newConfRatio) external onlyRole(ADMIN_ROLE) {
        // confidence ratio limit check
        if (newConfRatio > MAX_CONF_RATIO) {
            revert OracleMiddlewareConfRatioTooHigh();
        }

        _confRatioBps = newConfRatio;

        emit ConfRatioUpdated(newConfRatio);
    }

    /// @inheritdoc IOracleMiddleware
    function setLowLatencyDelay(uint16 newLowLatencyDelay, IUsdnProtocol usdnProtocol) external onlyRole(ADMIN_ROLE) {
        if (newLowLatencyDelay > 90 minutes) {
            revert OracleMiddlewareInvalidLowLatencyDelay();
        }
        if (newLowLatencyDelay < usdnProtocol.getLowLatencyValidatorDeadline()) {
            revert OracleMiddlewareInvalidLowLatencyDelay();
        }
        _lowLatencyDelay = newLowLatencyDelay;

        emit LowLatencyDelayUpdated(newLowLatencyDelay);
    }

    /// @inheritdoc IOracleMiddleware
    function withdrawEther(address to) external onlyRole(ADMIN_ROLE) {
        if (to == address(0)) {
            revert OracleMiddlewareTransferToZeroAddress();
        }
        // slither-disable-next-line arbitrary-send-eth
        (bool success,) = payable(to).call{ value: address(this).balance }("");
        if (!success) {
            revert OracleMiddlewareTransferFailed(to);
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity ^0.8.20;

import {IERC20} from "../IERC20.sol";

/**
 * @dev Interface for the optional metadata functions from the ERC-20 standard.
 */
interface IERC20Metadata is IERC20 {
    /**
     * @dev Returns the name of the token.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the symbol of the token.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the decimals places of the token.
     */
    function decimals() external view returns (uint8);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (token/ERC20/extensions/IERC20Permit.sol)

pragma solidity ^0.8.20;

/**
 * @dev Interface of the ERC-20 Permit extension allowing approvals to be made via signatures, as defined in
 * https://eips.ethereum.org/EIPS/eip-2612[ERC-2612].
 *
 * Adds the {permit} method, which can be used to change an account's ERC-20 allowance (see {IERC20-allowance}) by
 * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
 * need to send a transaction, and thus is not required to hold Ether at all.
 *
 * ==== Security Considerations
 *
 * There are two important considerations concerning the use of `permit`. The first is that a valid permit signature
 * expresses an allowance, and it should not be assumed to convey additional meaning. In particular, it should not be
 * considered as an intention to spend the allowance in any specific way. The second is that because permits have
 * built-in replay protection and can be submitted by anyone, they can be frontrun. A protocol that uses permits should
 * take this into consideration and allow a `permit` call to fail. Combining these two aspects, a pattern that may be
 * generally recommended is:
 *
 * ```solidity
 * function doThingWithPermit(..., uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public {
 *     try token.permit(msg.sender, address(this), value, deadline, v, r, s) {} catch {}
 *     doThing(..., value);
 * }
 *
 * function doThing(..., uint256 value) public {
 *     token.safeTransferFrom(msg.sender, address(this), value);
 *     ...
 * }
 * ```
 *
 * Observe that: 1) `msg.sender` is used as the owner, leaving no ambiguity as to the signer intent, and 2) the use of
 * `try/catch` allows the permit to fail and makes the code tolerant to frontrunning. (See also
 * {SafeERC20-safeTransferFrom}).
 *
 * Additionally, note that smart contract wallets (such as Argent or Safe) are not able to produce permit signatures, so
 * contracts should have entry points that don't rely on permit.
 */
interface IERC20Permit {
    /**
     * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
     * given ``owner``'s signed approval.
     *
     * IMPORTANT: The same issues {IERC20-approve} has related to transaction
     * ordering also apply here.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `deadline` must be a timestamp in the future.
     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
     * over the EIP712-formatted function arguments.
     * - the signature must use ``owner``'s current nonce (see {nonces}).
     *
     * For more information on the signature format, see the
     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
     * section].
     *
     * CAUTION: See Security Considerations above.
     */
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

    /**
     * @dev Returns the current nonce for `owner`. This value must be
     * included whenever a signature is generated for {permit}.
     *
     * Every successful call to {permit} increases ``owner``'s nonce by one. This
     * prevents a signature from being used multiple times.
     */
    function nonces(address owner) external view returns (uint256);

    /**
     * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
     */
    // solhint-disable-next-line func-name-mixedcase
    function DOMAIN_SEPARATOR() external view returns (bytes32);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

/**
 * @notice A library for manipulating uint512 quantities.
 * @dev The 512-bit unsigned integers are represented as two uint256 "limbs", a `hi` limb for the most significant bits,
 * and a `lo` limb for the least-significant bits. The resulting uint512 quantity is obtained with `hi * 2^256 + lo`.
 */
library HugeUint {
    /// @notice Indicates that the division failed because the divisor is zero or the result overflows a uint256.
    error HugeUintDivisionFailed();

    /// @notice Indicates that the addition overflowed a uint512.
    error HugeUintAddOverflow();

    /// @notice Indicates that the subtraction underflowed.
    error HugeUintSubUnderflow();

    /// @notice Indicates that the multiplication overflowed a uint512.
    error HugeUintMulOverflow();

    /**
     * @notice A 512-bit integer represented as two 256-bit limbs.
     * @dev The integer value can be reconstructed as `hi * 2^256 + lo`.
     * @param hi The most-significant bits (higher limb) of the integer.
     * @param lo The least-significant bits (lower limb) of the integer.
     */
    struct Uint512 {
        uint256 hi;
        uint256 lo;
    }

    /**
     * @notice Wraps a uint256 into a {Uint512} integer.
     * @param x A uint256 integer.
     * @return The same value as a 512-bit integer.
     */
    function wrap(uint256 x) internal pure returns (Uint512 memory) {
        return Uint512({ hi: 0, lo: x });
    }

    /**
     * @notice Calculates the sum `a + b` of two 512-bit unsigned integers.
     * @dev This function will revert if the result overflows a uint512.
     * @param a The first operand.
     * @param b The second operand.
     * @return res_ The sum of `a` and `b`.
     */
    function add(Uint512 memory a, Uint512 memory b) internal pure returns (Uint512 memory res_) {
        (res_.lo, res_.hi) = _add(a.lo, a.hi, b.lo, b.hi);
        // check for overflow, i.e. if the result is less than b
        if (res_.hi < b.hi || (res_.hi == b.hi && res_.lo < b.lo)) {
            revert HugeUintAddOverflow();
        }
    }

    /**
     * @notice Calculates the difference `a - b` of two 512-bit unsigned integers.
     * @dev This function will revert if `b > a`.
     * @param a The first operand.
     * @param b The second operand.
     * @return res_ The difference `a - b`.
     */
    function sub(Uint512 memory a, Uint512 memory b) internal pure returns (Uint512 memory res_) {
        // check for underflow
        if (a.hi < b.hi || (a.hi == b.hi && a.lo < b.lo)) {
            revert HugeUintSubUnderflow();
        }
        (res_.lo, res_.hi) = _sub(a.lo, a.hi, b.lo, b.hi);
    }

    /**
     * @notice Calculates the product `a * b` of two 256-bit unsigned integers using the Chinese remainder theorem.
     * @param a The first operand.
     * @param b The second operand.
     * @return res_ The product `a * b` of the operands as an unsigned 512-bit integer.
     */
    function mul(uint256 a, uint256 b) internal pure returns (Uint512 memory res_) {
        (res_.lo, res_.hi) = _mul256(a, b);
    }

    /**
     * @notice Calculates the product `a * b` of a 512-bit unsigned integer and a 256-bit unsigned integer.
     * @dev This function reverts if the result overflows a uint512.
     * @param a The first operand.
     * @param b The second operand.
     * @return res_ The product `a * b` of the operands as an unsigned 512-bit integer.
     */
    function mul(Uint512 memory a, uint256 b) internal pure returns (Uint512 memory res_) {
        if ((a.hi == 0 && a.lo == 0) || b == 0) {
            return res_;
        }
        (res_.lo, res_.hi) = _mul256(a.lo, b);
        unchecked {
            uint256 p = a.hi * b;
            if (p / b != a.hi) {
                revert HugeUintMulOverflow();
            }
            res_.hi += p;
            if (res_.hi < p) {
                revert HugeUintMulOverflow();
            }
        }
    }

    /**
     * @notice Calculates the division `floor(a / b)` of a 512-bit unsigned integer by an unsigned 256-bit integer.
     * @dev The call will revert if the result doesn't fit inside a uint256 or if the denominator is zero.
     * @param a The numerator as a 512-bit unsigned integer.
     * @param b The denominator as a 256-bit unsigned integer.
     * @return res_ The division `floor(a / b)` of the operands as an unsigned 256-bit integer.
     */
    function div(Uint512 memory a, uint256 b) internal pure returns (uint256 res_) {
        // make sure the output fits inside a uint256, also prevents b == 0
        if (b <= a.hi) {
            revert HugeUintDivisionFailed();
        }
        // if the numerator is smaller than the denominator, the result is zero
        if (a.hi == 0 && a.lo < b) {
            return 0;
        }
        // the first operand fits in 256 bits, we can use the Solidity division operator
        if (a.hi == 0) {
            unchecked {
                return a.lo / b;
            }
        }
        res_ = _div256(a.lo, a.hi, b);
    }

    /**
     * @notice Computes the division `floor(a/b)` of two 512-bit integers, knowing the result fits inside a uint256.
     * @dev Credits chfast (Apache 2.0 License): <https://github.com/chfast/intx>.
     * This function will revert if the second operand is zero or if the result doesn't fit inside a uint256.
     * @param a The numerator as a 512-bit integer.
     * @param b The denominator as a 512-bit integer.
     * @return res_ The quotient floor(a/b).
     */
    function div(Uint512 memory a, Uint512 memory b) internal pure returns (uint256 res_) {
        res_ = _div(a.lo, a.hi, b.lo, b.hi);
    }

    /**
     * @notice Calculates the sum `a + b` of two 512-bit unsigned integers.
     * @dev Credits Remco Bloemen (MIT license): <https://2π.com/17/512-bit-division>.
     * The result is not checked for overflow, the caller must ensure that the result fits inside a uint512.
     * @param a0 The low limb of the first operand.
     * @param a1 The high limb of the first operand.
     * @param b0 The low limb of the second operand.
     * @param b1 The high limb of the second operand.
     * @return lo_ The low limb of the result of `a + b`.
     * @return hi_ The high limb of the result of `a + b`.
     */
    function _add(uint256 a0, uint256 a1, uint256 b0, uint256 b1) internal pure returns (uint256 lo_, uint256 hi_) {
        assembly {
            lo_ := add(a0, b0)
            hi_ := add(add(a1, b1), lt(lo_, a0))
        }
    }

    /**
     * @notice Calculates the difference `a - b` of two 512-bit unsigned integers.
     * @dev Credits Remco Bloemen (MIT license): <https://2π.com/17/512-bit-division>.
     * The result is not checked for underflow, the caller must ensure that the second operand is less than or equal to
     * the first operand.
     * @param a0 The low limb of the first operand.
     * @param a1 The high limb of the first operand.
     * @param b0 The low limb of the second operand.
     * @param b1 The high limb of the second operand.
     * @return lo_ The low limb of the result of `a - b`.
     * @return hi_ The high limb of the result of `a - b`.
     */
    function _sub(uint256 a0, uint256 a1, uint256 b0, uint256 b1) internal pure returns (uint256 lo_, uint256 hi_) {
        assembly {
            lo_ := sub(a0, b0)
            hi_ := sub(sub(a1, b1), lt(a0, b0))
        }
    }

    /**
     * @notice Calculates the product `a * b` of two 256-bit unsigned integers using the Chinese remainder theorem.
     * @dev Credits Remco Bloemen (MIT license): <https://2π.com/17/chinese-remainder-theorem>
     * and Solady (MIT license): <https://github.com/Vectorized/solady>.
     * @param a The first operand.
     * @param b The second operand.
     * @return lo_ The low limb of the result of `a * b`.
     * @return hi_ The high limb of the result of `a * b`.
     */
    function _mul256(uint256 a, uint256 b) internal pure returns (uint256 lo_, uint256 hi_) {
        assembly {
            lo_ := mul(a, b)
            let mm := mulmod(a, b, not(0)) // (a * b) % uint256.max
            hi_ := sub(mm, add(lo_, lt(mm, lo_)))
        }
    }

    /**
     * @notice Calculates the division `floor(a / b)` of a 512-bit unsigned integer by an unsigned 256-bit integer.
     * @dev Credits Solady (MIT license): <https://github.com/Vectorized/solady>.
     * The caller must ensure that the result fits inside a uint256 and that the division is non-zero.
     * For performance reasons, the caller should ensure that the numerator high limb (hi) is non-zero.
     * @param a0 The low limb of the numerator.
     * @param a1 The high limb of the  numerator.
     * @param b The denominator as a 256-bit unsigned integer.
     * @return res_ The division `floor(a / b)` of the operands as an unsigned 256-bit integer.
     */
    function _div256(uint256 a0, uint256 a1, uint256 b) internal pure returns (uint256 res_) {
        uint256 r;
        assembly {
            // to make the division exact, we find out the remainder of the division of a by b
            r := mulmod(a1, not(0), b) // (a1 * uint256.max) % b
            r := addmod(r, a1, b) // (r + a1) % b
            r := addmod(r, a0, b) // (r + a0) % b

            // `t` is the least significant bit of `b`
            // always greater or equal to 1
            let t := and(b, sub(0, b))
            // divide `b` by `t`, which is a power of two
            b := div(b, t)
            // invert `b mod 2**256`
            // now that `b` is an odd number, it has an inverse
            // modulo `2**256` such that `b * inv = 1 mod 2**256`
            // compute the inverse by starting with a seed that is
            // correct for four bits. That is, `b * inv = 1 mod 2**4`
            let inv := xor(2, mul(3, b))
            // now use Newton-Raphson iteration to improve the precision
            // thanks to Hensel's lifting lemma, this also works in modular
            // arithmetic, doubling the correct bits in each step
            inv := mul(inv, sub(2, mul(b, inv))) // inverse mod 2**8
            inv := mul(inv, sub(2, mul(b, inv))) // inverse mod 2**16
            inv := mul(inv, sub(2, mul(b, inv))) // inverse mod 2**32
            inv := mul(inv, sub(2, mul(b, inv))) // inverse mod 2**64
            inv := mul(inv, sub(2, mul(b, inv))) // inverse mod 2**128
            res_ :=
                mul(
                    // divide [a1 a0] by the factors of two
                    // shift in bits from `a1` into `a0`
                    // for this we need to flip `t` such that it is `2**256 / t`
                    or(mul(sub(a1, gt(r, a0)), add(div(sub(0, t), t), 1)), div(sub(a0, r), t)),
                    // inverse mod 2**256
                    mul(inv, sub(2, mul(b, inv)))
                )
        }
    }

    /**
     * @notice Computes the division of a 768-bit integer `a` by a 512-bit integer `b`, knowing the reciprocal of `b`.
     * @dev Credits chfast (Apache 2.0 License): <https://github.com/chfast/intx>.
     * @param a0 The LSB of the numerator.
     * @param a1 The middle limb of the numerator.
     * @param a2 The MSB of the numerator.
     * @param b0 The low limb of the divisor.
     * @param b1 The high limb of the divisor.
     * @param v The reciprocal `v` as defined in `_reciprocal_2`.
     * @return The quotient floor(a/b).
     */
    function _div_2(uint256 a0, uint256 a1, uint256 a2, uint256 b0, uint256 b1, uint256 v)
        internal
        pure
        returns (uint256)
    {
        (uint256 q0, uint256 q1) = _mul256(v, a2);
        (q0, q1) = _add(q0, q1, a1, a2);
        (uint256 t0, uint256 t1) = _mul256(b0, q1);
        uint256 r1;
        assembly {
            r1 := sub(a1, mul(q1, b1))
        }
        uint256 r0;
        (r0, r1) = _sub(a0, r1, t0, t1);
        (r0, r1) = _sub(r0, r1, b0, b1);
        assembly {
            q1 := add(q1, 1)
        }
        if (r1 >= q0) {
            assembly {
                q1 := sub(q1, 1)
            }
            (r0, r1) = _add(r0, r1, b0, b1);
        }
        if (r1 > b1 || (r1 == b1 && r0 >= b0)) {
            assembly {
                q1 := add(q1, 1)
            }
            // we don't care about the remainder
            // (r0, r1) = _sub(r0, r1, b0, b1);
        }
        return q1;
    }

    /**
     * @notice Computes the division floor(a/b) of two 512-bit integers, knowing the result fits inside a uint256.
     * @dev Credits chfast (Apache 2.0 License): <https://github.com/chfast/intx>.
     * @param a0 LSB of the numerator.
     * @param a1 MSB of the numerator.
     * @param b0 LSB of the divisor.
     * @param b1 MSB of the divisor.
     * @return res_ The quotient floor(a/b).
     */
    function _div(uint256 a0, uint256 a1, uint256 b0, uint256 b1) internal pure returns (uint256 res_) {
        if (b1 == 0) {
            // prevent division by zero
            if (b0 == 0) {
                revert HugeUintDivisionFailed();
            }
            // if both operands fit inside a uint256, we can use the Solidity division operator
            if (a1 == 0) {
                unchecked {
                    return a0 / b0;
                }
            }
            // if the result fits inside a uint256, we can use the `div(Uint512,uint256)` function
            if (b0 > a1) {
                return _div256(a0, a1, b0);
            }
            revert HugeUintDivisionFailed();
        }

        // if the numerator is smaller than the denominator, the result is zero
        if (a1 < b1 || (a1 == b1 && a0 < b0)) {
            return 0;
        }

        // division algo
        uint256 lsh = _clz(b1);
        if (lsh == 0) {
            // numerator is equal or larger than the denominator, and the denominator is at least 0b1000...
            // the result is necessarily 1
            return 1;
        }

        uint256 bn_lo;
        uint256 bn_hi;
        uint256 an_lo;
        uint256 an_hi;
        uint256 an_ex;
        assembly {
            let rsh := sub(256, lsh)
            bn_lo := shl(lsh, b0)
            bn_hi := or(shl(lsh, b1), shr(rsh, b0))
            an_lo := shl(lsh, a0)
            an_hi := or(shl(lsh, a1), shr(rsh, a0))
            an_ex := shr(rsh, a1)
        }
        uint256 v = _reciprocal_2(bn_lo, bn_hi);
        res_ = _div_2(an_lo, an_hi, an_ex, bn_lo, bn_hi, v);
    }

    /**
     * @notice Computes the reciprocal `v = floor((2^512-1) / d) - 2^256`.
     * @dev The input must be normalized (d >= 2^255).
     * @param d The input value.
     * @return v_ The reciprocal of d.
     */
    function _reciprocal(uint256 d) internal pure returns (uint256 v_) {
        if (d & 0x8000000000000000000000000000000000000000000000000000000000000000 == 0) {
            revert HugeUintDivisionFailed();
        }
        v_ = _div256(type(uint256).max, type(uint256).max - d, d);
    }

    /**
     * @notice Computes the reciprocal `v = floor((2^768-1) / d) - 2^256`, where d is a uint512 integer.
     * @dev Credits chfast (Apache 2.0 License): <https://github.com/chfast/intx>.
     * @param d0 LSB of the input.
     * @param d1 MSB of the input.
     * @return v_ The reciprocal of d.
     */
    function _reciprocal_2(uint256 d0, uint256 d1) internal pure returns (uint256 v_) {
        v_ = _reciprocal(d1);
        uint256 p;
        assembly {
            p := mul(d1, v_)
            p := add(p, d0)
            if lt(p, d0) {
                // carry out
                v_ := sub(v_, 1)
                if iszero(lt(p, d1)) {
                    v_ := sub(v_, 1)
                    p := sub(p, d1)
                }
                p := sub(p, d1)
            }
        }
        (uint256 t0, uint256 t1) = _mul256(v_, d0);
        assembly {
            p := add(p, t1)
            if lt(p, t1) {
                // carry out
                v_ := sub(v_, 1)
                if and(iszero(lt(p, d1)), or(gt(p, d1), iszero(lt(t0, d0)))) {
                    // if (<p, t0> >= <d1, d0>)
                    v_ := sub(v_, 1)
                }
            }
        }
    }

    /**
     * @notice Counts the number of consecutive zero bits, starting from the left.
     * @dev Credits Solady (MIT license): <https://github.com/Vectorized/solady>.
     * @param x An unsigned integer.
     * @return n_ The number of zeroes starting from the most significant bit.
     */
    function _clz(uint256 x) internal pure returns (uint256 n_) {
        if (x == 0) {
            return 256;
        }
        assembly {
            n_ := shl(7, lt(0xffffffffffffffffffffffffffffffff, x))
            n_ := or(n_, shl(6, lt(0xffffffffffffffff, shr(n_, x))))
            n_ := or(n_, shl(5, lt(0xffffffff, shr(n_, x))))
            n_ := or(n_, shl(4, lt(0xffff, shr(n_, x))))
            n_ := or(n_, shl(3, lt(0xff, shr(n_, x))))
            n_ :=
                add(
                    xor(
                        n_,
                        byte(
                            and(0x1f, shr(shr(n_, x), 0x8421084210842108cc6318c6db6d54be)),
                            0xf8f9f9faf9fdfafbf9fdfcfdfafbfcfef9fafdfafcfcfbfefafafcfbffffffff
                        )
                    ),
                    iszero(x)
                )
        }
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

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

/// @notice Library for storage of packed unsigned booleans.
/// @author Solady (https://github.com/vectorized/solady/blob/main/src/utils/LibBitmap.sol)
/// @author Modified from Solmate (https://github.com/transmissions11/solmate/blob/main/src/utils/LibBitmap.sol)
/// @author Modified from Solidity-Bits (https://github.com/estarriolvetch/solidity-bits/blob/main/contracts/BitMaps.sol)
library LibBitmap {
    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                         CONSTANTS                          */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev The constant returned when a bitmap scan does not find a result.
    uint256 internal constant NOT_FOUND = type(uint256).max;

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                          STRUCTS                           */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev A bitmap in storage.
    struct Bitmap {
        mapping(uint256 => uint256) map;
    }

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                         OPERATIONS                         */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev Returns the boolean value of the bit at `index` in `bitmap`.
    function get(Bitmap storage bitmap, uint256 index) internal view returns (bool isSet) {
        // It is better to set `isSet` to either 0 or 1, than zero vs non-zero.
        // Both cost the same amount of gas, but the former allows the returned value
        // to be reused without cleaning the upper bits.
        uint256 b = (bitmap.map[index >> 8] >> (index & 0xff)) & 1;
        /// @solidity memory-safe-assembly
        assembly {
            isSet := b
        }
    }

    /// @dev Updates the bit at `index` in `bitmap` to true.
    function set(Bitmap storage bitmap, uint256 index) internal {
        bitmap.map[index >> 8] |= (1 << (index & 0xff));
    }

    /// @dev Updates the bit at `index` in `bitmap` to false.
    function unset(Bitmap storage bitmap, uint256 index) internal {
        bitmap.map[index >> 8] &= ~(1 << (index & 0xff));
    }

    /// @dev Flips the bit at `index` in `bitmap`.
    /// Returns the boolean result of the flipped bit.
    function toggle(Bitmap storage bitmap, uint256 index) internal returns (bool newIsSet) {
        /// @solidity memory-safe-assembly
        assembly {
            mstore(0x20, bitmap.slot)
            mstore(0x00, shr(8, index))
            let storageSlot := keccak256(0x00, 0x40)
            let shift := and(index, 0xff)
            let storageValue := xor(sload(storageSlot), shl(shift, 1))
            // It makes sense to return the `newIsSet`,
            // as it allow us to skip an additional warm `sload`,
            // and it costs minimal gas (about 15),
            // which may be optimized away if the returned value is unused.
            newIsSet := and(1, shr(shift, storageValue))
            sstore(storageSlot, storageValue)
        }
    }

    /// @dev Updates the bit at `index` in `bitmap` to `shouldSet`.
    function setTo(Bitmap storage bitmap, uint256 index, bool shouldSet) internal {
        /// @solidity memory-safe-assembly
        assembly {
            mstore(0x20, bitmap.slot)
            mstore(0x00, shr(8, index))
            let storageSlot := keccak256(0x00, 0x40)
            let storageValue := sload(storageSlot)
            let shift := and(index, 0xff)
            sstore(
                storageSlot,
                // Unsets the bit at `shift` via `and`, then sets its new value via `or`.
                or(and(storageValue, not(shl(shift, 1))), shl(shift, iszero(iszero(shouldSet))))
            )
        }
    }

    /// @dev Consecutively sets `amount` of bits starting from the bit at `start`.
    function setBatch(Bitmap storage bitmap, uint256 start, uint256 amount) internal {
        /// @solidity memory-safe-assembly
        assembly {
            let max := not(0)
            let shift := and(start, 0xff)
            mstore(0x20, bitmap.slot)
            mstore(0x00, shr(8, start))
            if iszero(lt(add(shift, amount), 257)) {
                let storageSlot := keccak256(0x00, 0x40)
                sstore(storageSlot, or(sload(storageSlot), shl(shift, max)))
                let bucket := add(mload(0x00), 1)
                let bucketEnd := add(mload(0x00), shr(8, add(amount, shift)))
                amount := and(add(amount, shift), 0xff)
                shift := 0
                for {} iszero(eq(bucket, bucketEnd)) { bucket := add(bucket, 1) } {
                    mstore(0x00, bucket)
                    sstore(keccak256(0x00, 0x40), max)
                }
                mstore(0x00, bucket)
            }
            let storageSlot := keccak256(0x00, 0x40)
            sstore(storageSlot, or(sload(storageSlot), shl(shift, shr(sub(256, amount), max))))
        }
    }

    /// @dev Consecutively unsets `amount` of bits starting from the bit at `start`.
    function unsetBatch(Bitmap storage bitmap, uint256 start, uint256 amount) internal {
        /// @solidity memory-safe-assembly
        assembly {
            let shift := and(start, 0xff)
            mstore(0x20, bitmap.slot)
            mstore(0x00, shr(8, start))
            if iszero(lt(add(shift, amount), 257)) {
                let storageSlot := keccak256(0x00, 0x40)
                sstore(storageSlot, and(sload(storageSlot), not(shl(shift, not(0)))))
                let bucket := add(mload(0x00), 1)
                let bucketEnd := add(mload(0x00), shr(8, add(amount, shift)))
                amount := and(add(amount, shift), 0xff)
                shift := 0
                for {} iszero(eq(bucket, bucketEnd)) { bucket := add(bucket, 1) } {
                    mstore(0x00, bucket)
                    sstore(keccak256(0x00, 0x40), 0)
                }
                mstore(0x00, bucket)
            }
            let storageSlot := keccak256(0x00, 0x40)
            sstore(
                storageSlot, and(sload(storageSlot), not(shl(shift, shr(sub(256, amount), not(0)))))
            )
        }
    }

    /// @dev Returns number of set bits within a range by
    /// scanning `amount` of bits starting from the bit at `start`.
    function popCount(Bitmap storage bitmap, uint256 start, uint256 amount)
        internal
        view
        returns (uint256 count)
    {
        unchecked {
            uint256 bucket = start >> 8;
            uint256 shift = start & 0xff;
            if (!(amount + shift < 257)) {
                count = LibBit.popCount(bitmap.map[bucket] >> shift);
                uint256 bucketEnd = bucket + ((amount + shift) >> 8);
                amount = (amount + shift) & 0xff;
                shift = 0;
                for (++bucket; bucket != bucketEnd; ++bucket) {
                    count += LibBit.popCount(bitmap.map[bucket]);
                }
            }
            count += LibBit.popCount((bitmap.map[bucket] >> shift) << (256 - amount));
        }
    }

    /// @dev Returns the index of the most significant set bit in `[0..upTo]`.
    /// If no set bit is found, returns `NOT_FOUND`.
    function findLastSet(Bitmap storage bitmap, uint256 upTo)
        internal
        view
        returns (uint256 setBitIndex)
    {
        setBitIndex = NOT_FOUND;
        uint256 bucket = upTo >> 8;
        uint256 bits;
        /// @solidity memory-safe-assembly
        assembly {
            mstore(0x00, bucket)
            mstore(0x20, bitmap.slot)
            let offset := and(0xff, not(upTo)) // `256 - (255 & upTo) - 1`.
            bits := shr(offset, shl(offset, sload(keccak256(0x00, 0x40))))
            if iszero(or(bits, iszero(bucket))) {
                for {} 1 {} {
                    bucket := add(bucket, setBitIndex) // `sub(bucket, 1)`.
                    mstore(0x00, bucket)
                    bits := sload(keccak256(0x00, 0x40))
                    if or(bits, iszero(bucket)) { break }
                }
            }
        }
        if (bits != 0) {
            setBitIndex = (bucket << 8) | LibBit.fls(bits);
            /// @solidity memory-safe-assembly
            assembly {
                setBitIndex := or(setBitIndex, sub(0, gt(setBitIndex, upTo)))
            }
        }
    }

    /// @dev Returns the index of the least significant unset bit in `[begin..upTo]`.
    /// If no unset bit is found, returns `NOT_FOUND`.
    function findFirstUnset(Bitmap storage bitmap, uint256 begin, uint256 upTo)
        internal
        view
        returns (uint256 unsetBitIndex)
    {
        unsetBitIndex = NOT_FOUND;
        uint256 bucket = begin >> 8;
        uint256 negBits;
        /// @solidity memory-safe-assembly
        assembly {
            mstore(0x00, bucket)
            mstore(0x20, bitmap.slot)
            let offset := and(0xff, begin)
            negBits := shl(offset, shr(offset, not(sload(keccak256(0x00, 0x40)))))
            if iszero(negBits) {
                let lastBucket := shr(8, upTo)
                for {} 1 {} {
                    bucket := add(bucket, 1)
                    mstore(0x00, bucket)
                    negBits := not(sload(keccak256(0x00, 0x40)))
                    if or(negBits, gt(bucket, lastBucket)) { break }
                }
                if gt(bucket, lastBucket) {
                    negBits := shl(and(0xff, not(upTo)), shr(and(0xff, not(upTo)), negBits))
                }
            }
        }
        if (negBits != 0) {
            uint256 r = (bucket << 8) | LibBit.ffs(negBits);
            /// @solidity memory-safe-assembly
            assembly {
                unsetBitIndex := or(r, sub(0, or(gt(r, upTo), lt(r, begin))))
            }
        }
    }
}

// SPDX-License-Identifier: MIT
// based on the OpenZeppelin implementation
pragma solidity ^0.8.20;

import { IUsdnProtocolTypes as Types } from "../interfaces/UsdnProtocol/IUsdnProtocolTypes.sol";

/**
 * @notice A sequence of items with the ability to efficiently push and pop items (i.e. insert and remove) on both ends
 * of the sequence (called front and back).
 * @dev Storage use is optimized, and all operations are O(1) constant time.
 *
 * The struct is called `Deque` and holds {IUsdnProtocolTypes.PendingAction}'s. This data structure can only be used in
 * storage, and not in memory.
 */
library DoubleEndedQueue {
    /// @dev An operation (e.g. {front}) couldn't be completed due to the queue being empty.
    error QueueEmpty();

    /// @dev A push operation couldn't be completed due to the queue being full.
    error QueueFull();

    /// @dev An operation (e.g. {atRaw}) couldn't be completed due to an index being out of bounds.
    error QueueOutOfBounds();

    /**
     * @dev Indices are 128 bits so begin and end are packed in a single storage slot for efficient access.
     *
     * Struct members have an underscore prefix indicating that they are "private" and should not be read or written to
     * directly. Use the functions provided below instead. Modifying the struct manually may violate assumptions and
     * lead to unexpected behavior.
     *
     * The first item is at `data[begin]` and the last item is at `data[end - 1]`. This range can wrap around.
     * @param _begin The index of the first item in the queue.
     * @param _end The index of the item after the last item in the queue.
     * @param _data The items in the queue.
     */
    struct Deque {
        uint128 _begin;
        uint128 _end;
        mapping(uint128 index => Types.PendingAction) _data;
    }

    /**
     * @dev Inserts an item at the end of the queue.
     * Reverts with {QueueFull} if the queue is full.
     * @param deque The queue.
     * @param value The item to insert.
     * @return backIndex_ The raw index of the inserted item.
     */
    function pushBack(Deque storage deque, Types.PendingAction memory value) external returns (uint128 backIndex_) {
        unchecked {
            backIndex_ = deque._end;
            if (backIndex_ + 1 == deque._begin) {
                revert QueueFull();
            }
            deque._data[backIndex_] = value;
            deque._end = backIndex_ + 1;
        }
    }

    /**
     * @dev Removes the item at the end of the queue and returns it.
     * Reverts with {QueueEmpty} if the queue is empty.
     * @param deque The queue.
     * @return value_ The removed item.
     */
    function popBack(Deque storage deque) public returns (Types.PendingAction memory value_) {
        unchecked {
            uint128 backIndex = deque._end;
            if (backIndex == deque._begin) {
                revert QueueEmpty();
            }
            --backIndex;
            value_ = deque._data[backIndex];
            delete deque._data[backIndex];
            deque._end = backIndex;
        }
    }

    /**
     * @dev Inserts an item at the beginning of the queue.
     * Reverts with {QueueFull} if the queue is full.
     * @param deque The queue.
     * @param value The item to insert.
     * @return frontIndex_ The raw index of the inserted item.
     */
    function pushFront(Deque storage deque, Types.PendingAction memory value) external returns (uint128 frontIndex_) {
        unchecked {
            frontIndex_ = deque._begin - 1;
            if (frontIndex_ == deque._end) {
                revert QueueFull();
            }
            deque._data[frontIndex_] = value;
            deque._begin = frontIndex_;
        }
    }

    /**
     * @dev Removes the item at the beginning of the queue and returns it.
     * Reverts with {QueueEmpty} if the queue is empty.
     * @param deque The queue.
     * @return value_ The removed item.
     */
    function popFront(Deque storage deque) public returns (Types.PendingAction memory value_) {
        unchecked {
            uint128 frontIndex = deque._begin;
            if (frontIndex == deque._end) {
                revert QueueEmpty();
            }
            value_ = deque._data[frontIndex];
            delete deque._data[frontIndex];
            deque._begin = frontIndex + 1;
        }
    }

    /**
     * @dev Returns the item at the beginning of the queue.
     * Reverts with {QueueEmpty} if the queue is empty.
     * @param deque The queue.
     * @return value_ The item at the front of the queue.
     * @return rawIndex_ The raw index of the returned item.
     */
    function front(Deque storage deque) external view returns (Types.PendingAction memory value_, uint128 rawIndex_) {
        if (empty(deque)) {
            revert QueueEmpty();
        }
        rawIndex_ = deque._begin;
        value_ = deque._data[rawIndex_];
    }

    /**
     * @dev Returns the item at the end of the queue.
     * Reverts with {QueueEmpty} if the queue is empty.
     * @param deque The queue.
     * @return value_ The item at the back of the queue.
     * @return rawIndex_ The raw index of the returned item.
     */
    function back(Deque storage deque) external view returns (Types.PendingAction memory value_, uint128 rawIndex_) {
        if (empty(deque)) {
            revert QueueEmpty();
        }
        unchecked {
            rawIndex_ = deque._end - 1;
            value_ = deque._data[rawIndex_];
        }
    }

    /**
     * @dev Returns the item at a position in the queue given by `index`, with the first item at 0 and the last item at
     * `length(deque) - 1`.
     * Reverts with {QueueOutOfBounds} if the index is out of bounds.
     * @param deque The queue.
     * @param index The index of the item to return.
     * @return value_ The item at the given index.
     * @return rawIndex_ The raw index of the item.
     */
    function at(Deque storage deque, uint256 index)
        external
        view
        returns (Types.PendingAction memory value_, uint128 rawIndex_)
    {
        if (index >= length(deque)) {
            revert QueueOutOfBounds();
        }
        // by construction, length is a uint128, so the check above ensures that
        // the index can be safely downcast to a uint128
        unchecked {
            rawIndex_ = deque._begin + uint128(index);
            value_ = deque._data[rawIndex_];
        }
    }

    /**
     * @dev Returns the item at a position in the queue given by `rawIndex`, indexing into the underlying storage array
     * directly.
     * Reverts with {QueueOutOfBounds} if the index is out of bounds.
     * @param deque The queue.
     * @param rawIndex The index of the item to return.
     * @return value_ The item at the given index.
     */
    function atRaw(Deque storage deque, uint128 rawIndex) external view returns (Types.PendingAction memory value_) {
        if (!isValid(deque, rawIndex)) {
            revert QueueOutOfBounds();
        }
        value_ = deque._data[rawIndex];
    }

    /**
     * @dev Deletes the item at a position in the queue given by `rawIndex`, indexing into the underlying storage array
     * directly. If clearing the front or back item, then the bounds are updated. Otherwise, the values are simply set
     * to zero and the queue's begin and end indices are not updated.
     * @param deque The queue.
     * @param rawIndex The index of the item to delete.
     */
    function clearAt(Deque storage deque, uint128 rawIndex) external {
        uint128 backIndex = deque._end;
        unchecked {
            backIndex--;
        }
        if (rawIndex == deque._begin) {
            popFront(deque); // reverts if empty
        } else if (rawIndex == backIndex) {
            popBack(deque); // reverts if empty
        } else {
            // we don't care to revert if this is not a valid index, since we're just clearing it
            delete deque._data[rawIndex];
        }
    }

    /**
     * @dev Checks if the raw index is valid (in bounds).
     * @param deque The queue.
     * @param rawIndex The raw index to check.
     * @return valid_ Whether the raw index is valid.
     */
    function isValid(Deque storage deque, uint128 rawIndex) public view returns (bool valid_) {
        if (deque._begin > deque._end) {
            // here the values are split at the beginning and end of the range, so invalid indices are in the middle
            if (rawIndex < deque._begin && rawIndex >= deque._end) {
                return false;
            }
        } else if (rawIndex < deque._begin || rawIndex >= deque._end) {
            return false;
        }
        valid_ = true;
    }

    /**
     * @dev Returns the number of items in the queue.
     * @param deque The queue.
     * @return length_ The number of items in the queue.
     */
    function length(Deque storage deque) public view returns (uint256 length_) {
        unchecked {
            length_ = uint256(deque._end - deque._begin);
        }
    }

    /**
     * @dev Returns true if the queue is empty.
     * @param deque The queue.
     * @return empty_ True if the queue is empty.
     */
    function empty(Deque storage deque) internal view returns (bool empty_) {
        empty_ = deque._end == deque._begin;
    }
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;

import { IUsdnProtocolTypes as Types } from "../UsdnProtocol/IUsdnProtocolTypes.sol";

/**
 * @title IBaseLiquidationRewardsManager
 * @notice This interface exposes the only function used by the UsdnProtocol.
 * @dev Future implementations of the rewards manager must implement this interface without modifications.
 */
interface IBaseLiquidationRewardsManager {
    /**
     * @notice Computes the amount of assets to reward a liquidator.
     * @param liquidatedTicks Information about the liquidated ticks.
     * @param currentPrice The current price of the asset.
     * @param rebased Indicates whether a USDN rebase was performed.
     * @param rebalancerAction The action performed by the {UsdnProtocolLongLibrary._triggerRebalancer} function.
     * @param action The type of protocol action that triggered the liquidation.
     * @param rebaseCallbackResult The result of the rebase callback, if any.
     * @param priceData The oracle price data, if any. This can be used to differentiate rewards based on the oracle
     * used to provide the liquidation price.
     * @return assetRewards_ The amount of asset tokens to reward the liquidator.
     */
    function getLiquidationRewards(
        Types.LiqTickInfo[] calldata liquidatedTicks,
        uint256 currentPrice,
        bool rebased,
        Types.RebalancerAction rebalancerAction,
        Types.ProtocolAction action,
        bytes calldata rebaseCallbackResult,
        bytes calldata priceData
    ) external view returns (uint256 assetRewards_);
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;

import { IUsdnProtocolTypes as Types } from "../UsdnProtocol/IUsdnProtocolTypes.sol";
import { PriceInfo } from "./IOracleMiddlewareTypes.sol";

/**
 * @title Base Oracle Middleware interface
 * @notice This interface exposes the only functions used or required by the USDN Protocol.
 * @dev Any current or future implementation of the oracle middleware must be compatible with
 * this interface without any modification.
 */
interface IBaseOracleMiddleware {
    /**
     * @notice Parse and validate `data` and returns the corresponding price data.
     * @dev The data format is specific to the middleware and is simply forwarded from the user transaction's calldata.
     * A fee amounting to exactly {validationCost} (with the same `data` and `action`) must be sent or the transaction
     * will revert.
     * @param actionId A unique identifier for the current action. This identifier can be used to link an `Initiate`
     * call with the corresponding `Validate` call.
     * @param targetTimestamp The target timestamp for validating the price data. For validation actions, this is the
     * timestamp of the initiation.
     * @param action Type of action for which the price is requested. The middleware may use this to alter the
     * validation of the price or the returned price.
     * @param data The data to be used to communicate with oracles, the format varies from middleware to middleware and
     * can be different depending on the action.
     * @return result_ The price and timestamp as {IOracleMiddlewareTypes.PriceInfo}.
     */
    function parseAndValidatePrice(
        bytes32 actionId,
        uint128 targetTimestamp,
        Types.ProtocolAction action,
        bytes calldata data
    ) external payable returns (PriceInfo memory result_);

    /**
     * @notice Gets the required delay (in seconds) between the moment an action is initiated and the timestamp of the
     * price data used to validate that action.
     * @return delay_ The validation delay.
     */
    function getValidationDelay() external view returns (uint256 delay_);

    /**
     * @notice Gets The maximum amount of time (in seconds) after initiation during which a low-latency price oracle can
     * be used for validation.
     * @return delay_ The maximum delay for low-latency validation.
     */
    function getLowLatencyDelay() external view returns (uint16 delay_);

    /**
     * @notice Gets the number of decimals for the price.
     * @return decimals_ The number of decimals.
     */
    function getDecimals() external view returns (uint8 decimals_);

    /**
     * @notice Returns the cost of one price validation for the given action (in native token).
     * @param data Price data for which to get the fee.
     * @param action Type of the action for which the price is requested.
     * @return cost_ The cost of one price validation (in native token).
     */
    function validationCost(bytes calldata data, Types.ProtocolAction action) external view returns (uint256 cost_);
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;

import { IUsdnProtocolTypes as Types } from "../UsdnProtocol/IUsdnProtocolTypes.sol";
import { IRebalancerTypes } from "./IRebalancerTypes.sol";

interface IBaseRebalancer {
    /**
     * @notice Returns the necessary data for the USDN protocol to update the position.
     * @return pendingAssets_ The amount of assets that are pending inclusion in the protocol.
     * @return maxLeverage_ The maximum leverage of the rebalancer.
     * @return currentPosId_ The ID of the current position (`tick` == `NO_POSITION_TICK` if no position).
     */
    function getCurrentStateData()
        external
        view
        returns (uint128 pendingAssets_, uint256 maxLeverage_, Types.PositionId memory currentPosId_);

    /**
     * @notice Returns the minimum amount of assets a user can deposit in the rebalancer.
     * @return minAssetDeposit_ The minimum amount of assets that can be deposited by a user.
     */
    function getMinAssetDeposit() external view returns (uint256 minAssetDeposit_);

    /**
     * @notice Returns the data regarding the assets deposited by the provided user.
     * @param user The address of the user.
     * @return data_ The data regarding the assets deposited by the provided user.
     */
    function getUserDepositData(address user) external view returns (IRebalancerTypes.UserDeposit memory data_);

    /**
     * @notice Indicates that the previous version of the position was closed and a new one was opened.
     * @dev If `previousPosValue` equals 0, it means the previous version got liquidated.
     * @param newPosId The position ID of the new position.
     * @param previousPosValue The amount of assets left in the previous position.
     */
    function updatePosition(Types.PositionId calldata newPosId, uint128 previousPosValue) external;

    /* -------------------------------------------------------------------------- */
    /*                                    Admin                                   */
    /* -------------------------------------------------------------------------- */

    /**
     * @notice Sets the minimum amount of assets to be deposited by a user.
     * @dev The new minimum amount must be greater than or equal to the minimum long position of the USDN protocol.
     * This function can only be called by the owner or the USDN protocol.
     * @param minAssetDeposit The new minimum amount of assets to be deposited.
     */
    function setMinAssetDeposit(uint256 minAssetDeposit) external;
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;

import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import { IERC20Metadata } from "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol";
import { IERC20Permit } from "@openzeppelin/contracts/token/ERC20/extensions/IERC20Permit.sol";

import { IRebaseCallback } from "./IRebaseCallback.sol";
import { IUsdnErrors } from "./IUsdnErrors.sol";
import { IUsdnEvents } from "./IUsdnEvents.sol";

/**
 * @title USDN token interface
 * @notice Implements the ERC-20 token standard as well as the EIP-2612 permit extension. Additional functions related
 * to the specifics of this token are included below.
 */
interface IUsdn is IERC20, IERC20Metadata, IERC20Permit, IUsdnEvents, IUsdnErrors {
    /**
     * @notice Returns the total number of shares in existence.
     * @return shares_ The number of shares.
     */
    function totalShares() external view returns (uint256 shares_);

    /**
     * @notice Returns the number of shares owned by `account`.
     * @param account The account to query.
     * @return shares_ The number of shares.
     */
    function sharesOf(address account) external view returns (uint256 shares_);

    /**
     * @notice Transfers a given amount of shares from the `msg.sender` to `to`.
     * @param to Recipient of the shares.
     * @param value Number of shares to transfer.
     * @return success_ Indicates whether the transfer was successfully executed.
     */
    function transferShares(address to, uint256 value) external returns (bool success_);

    /**
     * @notice Transfers a given amount of shares from the `from` to `to`.
     * @dev There should be sufficient allowance for the spender. Be mindful of the rebase logic. The allowance is in
     * tokens. So, after a rebase, the same amount of shares will be worth a higher amount of tokens. In that case,
     * the allowance of the initial approval will not be enough to transfer the new amount of tokens. This can
     * also happen when your transaction is in the mempool and the rebase happens before your transaction. Also note
     * that the amount of tokens deduced from the allowance is rounded up, so the `convertToTokensRoundUp` function
     * should be used when converting shares into an allowance value.
     * @param from The owner of the shares.
     * @param to Recipient of the shares.
     * @param value Number of shares to transfer.
     * @return success_ Indicates whether the transfer was successfully executed.
     */
    function transferSharesFrom(address from, address to, uint256 value) external returns (bool success_);

    /**
     * @notice Mints new shares, providing a token value.
     * @dev Caller must have the MINTER_ROLE.
     * @param to Account to receive the new shares.
     * @param amount Amount of tokens to mint, is internally converted to the proper shares amounts.
     */
    function mint(address to, uint256 amount) external;

    /**
     * @notice Mints new shares, providing a share value.
     * @dev Caller must have the MINTER_ROLE.
     * @param to Account to receive the new shares.
     * @param amount Amount of shares to mint.
     * @return mintedTokens_ Amount of tokens that were minted (informational).
     */
    function mintShares(address to, uint256 amount) external returns (uint256 mintedTokens_);

    /**
     * @notice Destroys a `value` amount of tokens from the caller, reducing the total supply.
     * @param value Amount of tokens to burn, is internally converted to the proper shares amounts.
     */
    function burn(uint256 value) external;

    /**
     * @notice Destroys a `value` amount of tokens from `account`, deducting from the caller's allowance.
     * @param account Account to burn tokens from.
     * @param value Amount of tokens to burn, is internally converted to the proper shares amounts.
     */
    function burnFrom(address account, uint256 value) external;

    /**
     * @notice Destroys a `value` amount of shares from the caller, reducing the total supply.
     * @param value Amount of shares to burn.
     */
    function burnShares(uint256 value) external;

    /**
     * @notice Destroys a `value` amount of shares from `account`, deducting from the caller's allowance.
     * @dev There should be sufficient allowance for the spender. Be mindful of the rebase logic. The allowance is in
     * tokens. So, after a rebase, the same amount of shares will be worth a higher amount of tokens. In that case,
     * the allowance of the initial approval will not be enough to transfer the new amount of tokens. This can
     * also happen when your transaction is in the mempool and the rebase happens before your transaction. Also note
     * that the amount of tokens deduced from the allowance is rounded up, so the `convertToTokensRoundUp` function
     * should be used when converting shares into an allowance value.
     * @param account Account to burn shares from.
     * @param value Amount of shares to burn.
     */
    function burnSharesFrom(address account, uint256 value) external;

    /**
     * @notice Converts a number of tokens to the corresponding amount of shares.
     * @dev The conversion reverts with `UsdnMaxTokensExceeded` if the corresponding amount of shares overflows.
     * @param amountTokens The amount of tokens to convert to shares.
     * @return shares_ The corresponding amount of shares.
     */
    function convertToShares(uint256 amountTokens) external view returns (uint256 shares_);

    /**
     * @notice Converts a number of shares to the corresponding amount of tokens.
     * @dev The conversion never overflows as we are performing a division. The conversion rounds to the nearest amount
     * of tokens that minimizes the error when converting back to shares.
     * @param amountShares The amount of shares to convert to tokens.
     * @return tokens_ The corresponding amount of tokens.
     */
    function convertToTokens(uint256 amountShares) external view returns (uint256 tokens_);

    /**
     * @notice Converts a number of shares to the corresponding amount of tokens, rounding up.
     * @dev Use this function to determine the amount of a token approval, as we always round up when deducting from
     * a token transfer allowance.
     * @param amountShares The amount of shares to convert to tokens.
     * @return tokens_ The corresponding amount of tokens, rounded up.
     */
    function convertToTokensRoundUp(uint256 amountShares) external view returns (uint256 tokens_);

    /**
     * @notice Returns the current maximum tokens supply, given the current divisor.
     * @dev This function is used to check if a conversion operation would overflow.
     * @return maxTokens_ The maximum number of tokens that can exist.
     */
    function maxTokens() external view returns (uint256 maxTokens_);

    /**
     * @notice Decreases the global divisor, which effectively grows all balances and the total supply.
     * @dev If the provided divisor is larger than or equal to the current divisor value, no rebase will happen
     * If the new divisor is smaller than `MIN_DIVISOR`, the value will be clamped to `MIN_DIVISOR`.
     * Caller must have the `REBASER_ROLE`.
     * @param newDivisor The new divisor, should be strictly smaller than the current one and greater or equal to
     * `MIN_DIVISOR`.
     * @return rebased_ Whether a rebase happened.
     * @return oldDivisor_ The previous value of the divisor.
     * @return callbackResult_ The result of the callback, if a rebase happened and a callback handler is defined.
     */
    function rebase(uint256 newDivisor)
        external
        returns (bool rebased_, uint256 oldDivisor_, bytes memory callbackResult_);

    /**
     * @notice Sets the rebase handler address.
     * @dev Emits a `RebaseHandlerUpdated` event.
     * If set to the zero address, no handler will be called after a rebase.
     * Caller must have the `DEFAULT_ADMIN_ROLE`.
     * @param newHandler The new handler address.
     */
    function setRebaseHandler(IRebaseCallback newHandler) external;

    /* -------------------------------------------------------------------------- */
    /*                             Dev view functions                             */
    /* -------------------------------------------------------------------------- */

    /**
     * @notice Gets the current value of the divisor that converts between tokens and shares.
     * @return divisor_ The current divisor.
     */
    function divisor() external view returns (uint256 divisor_);

    /**
     * @notice Gets the rebase handler address, which is called whenever a rebase happens.
     * @return rebaseHandler_ The rebase handler address.
     */
    function rebaseHandler() external view returns (IRebaseCallback rebaseHandler_);

    /**
     * @notice Gets the minter role signature.
     * @return minter_role_ The role signature.
     */
    function MINTER_ROLE() external pure returns (bytes32 minter_role_);

    /**
     * @notice Gets the rebaser role signature.
     * @return rebaser_role_ The role signature.
     */
    function REBASER_ROLE() external pure returns (bytes32 rebaser_role_);

    /**
     * @notice Gets the maximum value of the divisor, which is also the initial value.
     * @return maxDivisor_ The maximum divisor.
     */
    function MAX_DIVISOR() external pure returns (uint256 maxDivisor_);

    /**
     * @notice Gets the minimum acceptable value of the divisor.
     * @dev The minimum divisor that can be set. This corresponds to a growth of 1B times. Technically, 1e5 would still
     * work without precision errors.
     * @return minDivisor_ The minimum divisor.
     */
    function MIN_DIVISOR() external pure returns (uint256 minDivisor_);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (access/extensions/AccessControlDefaultAdminRules.sol)

pragma solidity ^0.8.20;

import {IAccessControlDefaultAdminRules} from "./IAccessControlDefaultAdminRules.sol";
import {AccessControl, IAccessControl} from "../AccessControl.sol";
import {SafeCast} from "../../utils/math/SafeCast.sol";
import {Math} from "../../utils/math/Math.sol";
import {IERC5313} from "../../interfaces/IERC5313.sol";

/**
 * @dev Extension of {AccessControl} that allows specifying special rules to manage
 * the `DEFAULT_ADMIN_ROLE` holder, which is a sensitive role with special permissions
 * over other roles that may potentially have privileged rights in the system.
 *
 * If a specific role doesn't have an admin role assigned, the holder of the
 * `DEFAULT_ADMIN_ROLE` will have the ability to grant it and revoke it.
 *
 * This contract implements the following risk mitigations on top of {AccessControl}:
 *
 * * Only one account holds the `DEFAULT_ADMIN_ROLE` since deployment until it's potentially renounced.
 * * Enforces a 2-step process to transfer the `DEFAULT_ADMIN_ROLE` to another account.
 * * Enforces a configurable delay between the two steps, with the ability to cancel before the transfer is accepted.
 * * The delay can be changed by scheduling, see {changeDefaultAdminDelay}.
 * * It is not possible to use another role to manage the `DEFAULT_ADMIN_ROLE`.
 *
 * Example usage:
 *
 * ```solidity
 * contract MyToken is AccessControlDefaultAdminRules {
 *   constructor() AccessControlDefaultAdminRules(
 *     3 days,
 *     msg.sender // Explicit initial `DEFAULT_ADMIN_ROLE` holder
 *    ) {}
 * }
 * ```
 */
abstract contract AccessControlDefaultAdminRules is IAccessControlDefaultAdminRules, IERC5313, AccessControl {
    // pending admin pair read/written together frequently
    address private _pendingDefaultAdmin;
    uint48 private _pendingDefaultAdminSchedule; // 0 == unset

    uint48 private _currentDelay;
    address private _currentDefaultAdmin;

    // pending delay pair read/written together frequently
    uint48 private _pendingDelay;
    uint48 private _pendingDelaySchedule; // 0 == unset

    /**
     * @dev Sets the initial values for {defaultAdminDelay} and {defaultAdmin} address.
     */
    constructor(uint48 initialDelay, address initialDefaultAdmin) {
        if (initialDefaultAdmin == address(0)) {
            revert AccessControlInvalidDefaultAdmin(address(0));
        }
        _currentDelay = initialDelay;
        _grantRole(DEFAULT_ADMIN_ROLE, initialDefaultAdmin);
    }

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

    /**
     * @dev See {IERC5313-owner}.
     */
    function owner() public view virtual returns (address) {
        return defaultAdmin();
    }

    ///
    /// Override AccessControl role management
    ///

    /**
     * @dev See {AccessControl-grantRole}. Reverts for `DEFAULT_ADMIN_ROLE`.
     */
    function grantRole(bytes32 role, address account) public virtual override(AccessControl, IAccessControl) {
        if (role == DEFAULT_ADMIN_ROLE) {
            revert AccessControlEnforcedDefaultAdminRules();
        }
        super.grantRole(role, account);
    }

    /**
     * @dev See {AccessControl-revokeRole}. Reverts for `DEFAULT_ADMIN_ROLE`.
     */
    function revokeRole(bytes32 role, address account) public virtual override(AccessControl, IAccessControl) {
        if (role == DEFAULT_ADMIN_ROLE) {
            revert AccessControlEnforcedDefaultAdminRules();
        }
        super.revokeRole(role, account);
    }

    /**
     * @dev See {AccessControl-renounceRole}.
     *
     * For the `DEFAULT_ADMIN_ROLE`, it only allows renouncing in two steps by first calling
     * {beginDefaultAdminTransfer} to the `address(0)`, so it's required that the {pendingDefaultAdmin} schedule
     * has also passed when calling this function.
     *
     * After its execution, it will not be possible to call `onlyRole(DEFAULT_ADMIN_ROLE)` functions.
     *
     * NOTE: Renouncing `DEFAULT_ADMIN_ROLE` will leave the contract without a {defaultAdmin},
     * thereby disabling any functionality that is only available for it, and the possibility of reassigning a
     * non-administrated role.
     */
    function renounceRole(bytes32 role, address account) public virtual override(AccessControl, IAccessControl) {
        if (role == DEFAULT_ADMIN_ROLE && account == defaultAdmin()) {
            (address newDefaultAdmin, uint48 schedule) = pendingDefaultAdmin();
            if (newDefaultAdmin != address(0) || !_isScheduleSet(schedule) || !_hasSchedulePassed(schedule)) {
                revert AccessControlEnforcedDefaultAdminDelay(schedule);
            }
            delete _pendingDefaultAdminSchedule;
        }
        super.renounceRole(role, account);
    }

    /**
     * @dev See {AccessControl-_grantRole}.
     *
     * For `DEFAULT_ADMIN_ROLE`, it only allows granting if there isn't already a {defaultAdmin} or if the
     * role has been previously renounced.
     *
     * NOTE: Exposing this function through another mechanism may make the `DEFAULT_ADMIN_ROLE`
     * assignable again. Make sure to guarantee this is the expected behavior in your implementation.
     */
    function _grantRole(bytes32 role, address account) internal virtual override returns (bool) {
        if (role == DEFAULT_ADMIN_ROLE) {
            if (defaultAdmin() != address(0)) {
                revert AccessControlEnforcedDefaultAdminRules();
            }
            _currentDefaultAdmin = account;
        }
        return super._grantRole(role, account);
    }

    /**
     * @dev See {AccessControl-_revokeRole}.
     */
    function _revokeRole(bytes32 role, address account) internal virtual override returns (bool) {
        if (role == DEFAULT_ADMIN_ROLE && account == defaultAdmin()) {
            delete _currentDefaultAdmin;
        }
        return super._revokeRole(role, account);
    }

    /**
     * @dev See {AccessControl-_setRoleAdmin}. Reverts for `DEFAULT_ADMIN_ROLE`.
     */
    function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual override {
        if (role == DEFAULT_ADMIN_ROLE) {
            revert AccessControlEnforcedDefaultAdminRules();
        }
        super._setRoleAdmin(role, adminRole);
    }

    ///
    /// AccessControlDefaultAdminRules accessors
    ///

    /**
     * @inheritdoc IAccessControlDefaultAdminRules
     */
    function defaultAdmin() public view virtual returns (address) {
        return _currentDefaultAdmin;
    }

    /**
     * @inheritdoc IAccessControlDefaultAdminRules
     */
    function pendingDefaultAdmin() public view virtual returns (address newAdmin, uint48 schedule) {
        return (_pendingDefaultAdmin, _pendingDefaultAdminSchedule);
    }

    /**
     * @inheritdoc IAccessControlDefaultAdminRules
     */
    function defaultAdminDelay() public view virtual returns (uint48) {
        uint48 schedule = _pendingDelaySchedule;
        return (_isScheduleSet(schedule) && _hasSchedulePassed(schedule)) ? _pendingDelay : _currentDelay;
    }

    /**
     * @inheritdoc IAccessControlDefaultAdminRules
     */
    function pendingDefaultAdminDelay() public view virtual returns (uint48 newDelay, uint48 schedule) {
        schedule = _pendingDelaySchedule;
        return (_isScheduleSet(schedule) && !_hasSchedulePassed(schedule)) ? (_pendingDelay, schedule) : (0, 0);
    }

    /**
     * @inheritdoc IAccessControlDefaultAdminRules
     */
    function defaultAdminDelayIncreaseWait() public view virtual returns (uint48) {
        return 5 days;
    }

    ///
    /// AccessControlDefaultAdminRules public and internal setters for defaultAdmin/pendingDefaultAdmin
    ///

    /**
     * @inheritdoc IAccessControlDefaultAdminRules
     */
    function beginDefaultAdminTransfer(address newAdmin) public virtual onlyRole(DEFAULT_ADMIN_ROLE) {
        _beginDefaultAdminTransfer(newAdmin);
    }

    /**
     * @dev See {beginDefaultAdminTransfer}.
     *
     * Internal function without access restriction.
     */
    function _beginDefaultAdminTransfer(address newAdmin) internal virtual {
        uint48 newSchedule = SafeCast.toUint48(block.timestamp) + defaultAdminDelay();
        _setPendingDefaultAdmin(newAdmin, newSchedule);
        emit DefaultAdminTransferScheduled(newAdmin, newSchedule);
    }

    /**
     * @inheritdoc IAccessControlDefaultAdminRules
     */
    function cancelDefaultAdminTransfer() public virtual onlyRole(DEFAULT_ADMIN_ROLE) {
        _cancelDefaultAdminTransfer();
    }

    /**
     * @dev See {cancelDefaultAdminTransfer}.
     *
     * Internal function without access restriction.
     */
    function _cancelDefaultAdminTransfer() internal virtual {
        _setPendingDefaultAdmin(address(0), 0);
    }

    /**
     * @inheritdoc IAccessControlDefaultAdminRules
     */
    function acceptDefaultAdminTransfer() public virtual {
        (address newDefaultAdmin, ) = pendingDefaultAdmin();
        if (_msgSender() != newDefaultAdmin) {
            // Enforce newDefaultAdmin explicit acceptance.
            revert AccessControlInvalidDefaultAdmin(_msgSender());
        }
        _acceptDefaultAdminTransfer();
    }

    /**
     * @dev See {acceptDefaultAdminTransfer}.
     *
     * Internal function without access restriction.
     */
    function _acceptDefaultAdminTransfer() internal virtual {
        (address newAdmin, uint48 schedule) = pendingDefaultAdmin();
        if (!_isScheduleSet(schedule) || !_hasSchedulePassed(schedule)) {
            revert AccessControlEnforcedDefaultAdminDelay(schedule);
        }
        _revokeRole(DEFAULT_ADMIN_ROLE, defaultAdmin());
        _grantRole(DEFAULT_ADMIN_ROLE, newAdmin);
        delete _pendingDefaultAdmin;
        delete _pendingDefaultAdminSchedule;
    }

    ///
    /// AccessControlDefaultAdminRules public and internal setters for defaultAdminDelay/pendingDefaultAdminDelay
    ///

    /**
     * @inheritdoc IAccessControlDefaultAdminRules
     */
    function changeDefaultAdminDelay(uint48 newDelay) public virtual onlyRole(DEFAULT_ADMIN_ROLE) {
        _changeDefaultAdminDelay(newDelay);
    }

    /**
     * @dev See {changeDefaultAdminDelay}.
     *
     * Internal function without access restriction.
     */
    function _changeDefaultAdminDelay(uint48 newDelay) internal virtual {
        uint48 newSchedule = SafeCast.toUint48(block.timestamp) + _delayChangeWait(newDelay);
        _setPendingDelay(newDelay, newSchedule);
        emit DefaultAdminDelayChangeScheduled(newDelay, newSchedule);
    }

    /**
     * @inheritdoc IAccessControlDefaultAdminRules
     */
    function rollbackDefaultAdminDelay() public virtual onlyRole(DEFAULT_ADMIN_ROLE) {
        _rollbackDefaultAdminDelay();
    }

    /**
     * @dev See {rollbackDefaultAdminDelay}.
     *
     * Internal function without access restriction.
     */
    function _rollbackDefaultAdminDelay() internal virtual {
        _setPendingDelay(0, 0);
    }

    /**
     * @dev Returns the amount of seconds to wait after the `newDelay` will
     * become the new {defaultAdminDelay}.
     *
     * The value returned guarantees that if the delay is reduced, it will go into effect
     * after a wait that honors the previously set delay.
     *
     * See {defaultAdminDelayIncreaseWait}.
     */
    function _delayChangeWait(uint48 newDelay) internal view virtual returns (uint48) {
        uint48 currentDelay = defaultAdminDelay();

        // When increasing the delay, we schedule the delay change to occur after a period of "new delay" has passed, up
        // to a maximum given by defaultAdminDelayIncreaseWait, by default 5 days. For example, if increasing from 1 day
        // to 3 days, the new delay will come into effect after 3 days. If increasing from 1 day to 10 days, the new
        // delay will come into effect after 5 days. The 5 day wait period is intended to be able to fix an error like
        // using milliseconds instead of seconds.
        //
        // When decreasing the delay, we wait the difference between "current delay" and "new delay". This guarantees
        // that an admin transfer cannot be made faster than "current delay" at the time the delay change is scheduled.
        // For example, if decreasing from 10 days to 3 days, the new delay will come into effect after 7 days.
        return
            newDelay > currentDelay
                ? uint48(Math.min(newDelay, defaultAdminDelayIncreaseWait())) // no need to safecast, both inputs are uint48
                : currentDelay - newDelay;
    }

    ///
    /// Private setters
    ///

    /**
     * @dev Setter of the tuple for pending admin and its schedule.
     *
     * May emit a DefaultAdminTransferCanceled event.
     */
    function _setPendingDefaultAdmin(address newAdmin, uint48 newSchedule) private {
        (, uint48 oldSchedule) = pendingDefaultAdmin();

        _pendingDefaultAdmin = newAdmin;
        _pendingDefaultAdminSchedule = newSchedule;

        // An `oldSchedule` from `pendingDefaultAdmin()` is only set if it hasn't been accepted.
        if (_isScheduleSet(oldSchedule)) {
            // Emit for implicit cancellations when another default admin was scheduled.
            emit DefaultAdminTransferCanceled();
        }
    }

    /**
     * @dev Setter of the tuple for pending delay and its schedule.
     *
     * May emit a DefaultAdminDelayChangeCanceled event.
     */
    function _setPendingDelay(uint48 newDelay, uint48 newSchedule) private {
        uint48 oldSchedule = _pendingDelaySchedule;

        if (_isScheduleSet(oldSchedule)) {
            if (_hasSchedulePassed(oldSchedule)) {
                // Materialize a virtual delay
                _currentDelay = _pendingDelay;
            } else {
                // Emit for implicit cancellations when another delay was scheduled.
                emit DefaultAdminDelayChangeCanceled();
            }
        }

        _pendingDelay = newDelay;
        _pendingDelaySchedule = newSchedule;
    }

    ///
    /// Private helpers
    ///

    /**
     * @dev Defines if an `schedule` is considered set. For consistency purposes.
     */
    function _isScheduleSet(uint48 schedule) private pure returns (bool) {
        return schedule != 0;
    }

    /**
     * @dev Defines if an `schedule` is considered passed. For consistency purposes.
     */
    function _hasSchedulePassed(uint48 schedule) private view returns (bool) {
        return schedule < block.timestamp;
    }
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;

import { IUsdnProtocol } from "../UsdnProtocol/IUsdnProtocol.sol";
import { IBaseOracleMiddleware } from "./IBaseOracleMiddleware.sol";
import { IChainlinkOracle } from "./IChainlinkOracle.sol";
import { IOracleMiddlewareErrors } from "./IOracleMiddlewareErrors.sol";
import { IOracleMiddlewareEvents } from "./IOracleMiddlewareEvents.sol";
import { IPythOracle } from "./IPythOracle.sol";

/**
 * @notice The oracle middleware is a contract that is used by the USDN protocol to validate price data.
 * Using a middleware allows the protocol to later upgrade to a new oracle logic without having to modify
 * the protocol's contracts.
 */
interface IOracleMiddleware is
    IChainlinkOracle,
    IPythOracle,
    IBaseOracleMiddleware,
    IOracleMiddlewareErrors,
    IOracleMiddlewareEvents
{
    /* -------------------------------------------------------------------------- */
    /*                                    Roles                                   */
    /* -------------------------------------------------------------------------- */

    /**
     * @notice Gets the admin role's signature.
     * @return role_ Get the role signature.
     */
    function ADMIN_ROLE() external pure returns (bytes32 role_);

    /* -------------------------------------------------------------------------- */
    /*                                  Constants                                 */
    /* -------------------------------------------------------------------------- */

    /**
     * @notice Gets the denominator for the variables using basis points as a unit.
     * @return denominator_ The BPS divisor.
     */
    function BPS_DIVISOR() external pure returns (uint16 denominator_);

    /**
     * @notice Gets the maximum value for `_confRatioBps`.
     * @return ratio_ The max allowed confidence ratio.
     */
    function MAX_CONF_RATIO() external pure returns (uint16 ratio_);

    /* -------------------------------------------------------------------------- */
    /*                              Generic features                              */
    /* -------------------------------------------------------------------------- */

    /**
     * @notice Gets the confidence ratio.
     * @dev This ratio is used to apply a specific portion of the confidence interval provided by an oracle, which is
     * used to adjust the precision of predictions or estimations.
     * @return ratio_ The confidence ratio (in basis points).
     */
    function getConfRatioBps() external view returns (uint16 ratio_);

    /* -------------------------------------------------------------------------- */
    /*                               Owner features                               */
    /* -------------------------------------------------------------------------- */

    /**
     * @notice Sets the confidence ratio.
     * @dev The new value should be lower than {MAX_CONF_RATIO}.
     * @param newConfRatio the new confidence ratio.
     */
    function setConfRatio(uint16 newConfRatio) external;

    /**
     * @notice Sets the elapsed time tolerated before we consider the price from Chainlink invalid.
     * @param newTimeElapsedLimit The new time elapsed limit.
     */
    function setChainlinkTimeElapsedLimit(uint256 newTimeElapsedLimit) external;

    /**
     * @notice Sets the amount of time after which we do not consider a price as recent.
     * @param newDelay The maximum age of a price to be considered recent.
     */
    function setPythRecentPriceDelay(uint64 newDelay) external;

    /**
     * @notice Sets the validation delay (in seconds) between an action timestamp and the price
     * data timestamp used to validate that action.
     * @param newValidationDelay The new validation delay.
     */
    function setValidationDelay(uint256 newValidationDelay) external;

    /**
     * @notice Sets the new low latency delay.
     * @param newLowLatencyDelay The new low latency delay.
     * @param usdnProtocol The address of the USDN protocol.
     */
    function setLowLatencyDelay(uint16 newLowLatencyDelay, IUsdnProtocol usdnProtocol) external;

    /**
     * @notice Withdraws the ether balance of this contract.
     * @dev This contract can receive funds but is not designed to hold them.
     * So this function can be used if there's an error and funds remain after a call.
     * @param to The address to send the ether to.
     */
    function withdrawEther(address to) external;
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;

import { IUsdnProtocolFallback } from "./IUsdnProtocolFallback.sol";
import { IUsdnProtocolImpl } from "./IUsdnProtocolImpl.sol";

/**
 * @title IUsdnProtocol
 * @notice Interface for the USDN protocol and fallback.
 */
interface IUsdnProtocol is IUsdnProtocolImpl, IUsdnProtocolFallback {
    /**
     * @notice Upgrades the protocol to a new implementation (check
     * [UUPSUpgradeable](https://docs.openzeppelin.com/contracts/5.x/api/proxy#UUPSUpgradeable)).
     * @dev This function should be called by the role with the PROXY_UPGRADE_ROLE.
     * @param newImplementation The address of the new implementation.
     * @param data The data to call when upgrading to the new implementation. Passing in empty data skips the
     * delegatecall to `newImplementation`.
     */
    function upgradeToAndCall(address newImplementation, bytes calldata data) external payable;
}

// SPDX-License-Identifier: BUSL-1.1
pragma solidity 0.8.26;

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

import { IChainlinkOracle } from "../../interfaces/OracleMiddleware/IChainlinkOracle.sol";
import { IOracleMiddlewareErrors } from "../../interfaces/OracleMiddleware/IOracleMiddlewareErrors.sol";
import { ChainlinkPriceInfo } from "../../interfaces/OracleMiddleware/IOracleMiddlewareTypes.sol";

/**
 * @title The Contract Communicating With the Chainlink Oracle Price Feed Contracts.
 * @notice This contract is used to get the price of an asset from Chainlink. It is used by the USDN protocol to get the
 * price of the USDN underlying asset, and by the LiquidationRewardsManager to get the price of the gas.
 */
abstract contract ChainlinkOracle is IChainlinkOracle, IOracleMiddlewareErrors {
    /// @inheritdoc IChainlinkOracle
    int256 public constant PRICE_TOO_OLD = type(int256).min;

    /// @notice The Chainlink price feed aggregator contract.
    AggregatorV3Interface internal immutable _priceFeed;

    /// @notice Tolerated elapsed time until we consider the data too old.
    // slither-disable-next-line immutable-states
    uint256 internal _timeElapsedLimit;

    /**
     * @param chainlinkPriceFeed Address of the price feed.
     * @param timeElapsedLimit Tolerated elapsed time before the data is considered invalid.
     */
    constructor(address chainlinkPriceFeed, uint256 timeElapsedLimit) {
        _priceFeed = AggregatorV3Interface(chainlinkPriceFeed);
        _timeElapsedLimit = timeElapsedLimit;
    }

    /// @inheritdoc IChainlinkOracle
    function getChainlinkDecimals() public view returns (uint256 decimals_) {
        return _priceFeed.decimals();
    }

    /// @inheritdoc IChainlinkOracle
    function getPriceFeed() public view returns (AggregatorV3Interface priceFeed_) {
        return _priceFeed;
    }

    /// @inheritdoc IChainlinkOracle
    function getChainlinkTimeElapsedLimit() external view returns (uint256 limit_) {
        return _timeElapsedLimit;
    }

    /**
     * @notice Gets the latest price of the asset from Chainlink.
     * @dev If the price is too old, the returned price will be equal to `PRICE_TOO_OLD`.
     * @return price_ The price of the asset.
     */
    function _getChainlinkLatestPrice() internal view virtual returns (ChainlinkPriceInfo memory price_) {
        (, int256 price,, uint256 timestamp,) = _priceFeed.latestRoundData();

        if (timestamp < block.timestamp - _timeElapsedLimit) {
            price = PRICE_TOO_OLD;
        }

        price_ = ChainlinkPriceInfo({ price: price, timestamp: timestamp });
    }

    /**
     * @notice Gets the latest price of the asset from Chainlink, formatted to the specified number of decimals.
     * @param middlewareDecimals The number of decimals to format the price to.
     * @return formattedPrice_ The formatted price of the asset.
     */
    function _getFormattedChainlinkLatestPrice(uint256 middlewareDecimals)
        internal
        view
        returns (ChainlinkPriceInfo memory formattedPrice_)
    {
        uint8 oracleDecimals = _priceFeed.decimals();
        formattedPrice_ = _getChainlinkLatestPrice();
        if (formattedPrice_.price == PRICE_TOO_OLD) {
            return formattedPrice_;
        }

        formattedPrice_.price = formattedPrice_.price * int256(10 ** middlewareDecimals) / int256(10 ** oracleDecimals);
    }

    /**
     * @notice Gets the price of the asset at the specified round ID, formatted to the specified number of decimals.
     * @param middlewareDecimals The number of decimals to format the price to.
     * @param roundId The targeted round ID.
     * @return formattedPrice_ The formatted price of the asset.
     */
    function _getFormattedChainlinkPrice(uint256 middlewareDecimals, uint80 roundId)
        internal
        view
        returns (ChainlinkPriceInfo memory formattedPrice_)
    {
        uint8 oracleDecimals = _priceFeed.decimals();
        formattedPrice_ = _getChainlinkPrice(roundId);
        if (formattedPrice_.price <= 0) {
            return formattedPrice_;
        }
        formattedPrice_.price = formattedPrice_.price * int256(10 ** middlewareDecimals) / int256(10 ** oracleDecimals);
    }

    /**
     * @notice Gets the price of the asset at the specified round ID.
     * @param roundId The Chainlink roundId price.
     * @return price_ The price of the asset.
     */
    function _getChainlinkPrice(uint80 roundId) internal view virtual returns (ChainlinkPriceInfo memory price_) {
        (, price_.price,, price_.timestamp,) = _priceFeed.getRoundData(roundId);
    }
}

// SPDX-License-Identifier: BUSL-1.1
pragma solidity 0.8.26;

import { IPyth } from "@pythnetwork/pyth-sdk-solidity/IPyth.sol";
import { PythStructs } from "@pythnetwork/pyth-sdk-solidity/PythStructs.sol";

import { IOracleMiddlewareErrors } from "../../interfaces/OracleMiddleware/IOracleMiddlewareErrors.sol";
import { FormattedPythPrice } from "../../interfaces/OracleMiddleware/IOracleMiddlewareTypes.sol";
import { IPythOracle } from "../../interfaces/OracleMiddleware/IPythOracle.sol";

/**
 * @title Contract To Communicate With The Pyth Oracle
 * @notice This contract is used to get the price of the asset that corresponds to the stored feed ID.
 * @dev Is implemented by the {OracleMiddleware} contract.
 */
abstract contract PythOracle is IPythOracle, IOracleMiddlewareErrors {
    /// @notice The ID of the Pyth price feed.
    bytes32 internal immutable _pythFeedId;

    /// @notice The address of the Pyth contract.
    IPyth internal immutable _pyth;

    /// @notice The maximum age of a recent price to be considered valid.
    uint64 internal _pythRecentPriceDelay = 45 seconds;

    /**
     * @param pythAddress The address of the Pyth contract.
     * @param pythFeedId The ID of the Pyth price feed.
     */
    constructor(address pythAddress, bytes32 pythFeedId) {
        _pyth = IPyth(pythAddress);
        _pythFeedId = pythFeedId;
    }

    /// @inheritdoc IPythOracle
    function getPyth() external view returns (IPyth) {
        return _pyth;
    }

    /// @inheritdoc IPythOracle
    function getPythFeedId() external view returns (bytes32) {
        return _pythFeedId;
    }

    /// @inheritdoc IPythOracle
    function getPythRecentPriceDelay() external view returns (uint64) {
        return _pythRecentPriceDelay;
    }

    /**
     * @notice Gets the price of the asset from the stored Pyth price feed.
     * @param priceUpdateData The data required to update the price feed.
     * @param targetTimestamp The timestamp of the price in the given `priceUpdateData`.
     * If zero, then we accept all recent prices.
     * @param targetLimit The most recent timestamp a price can have.
     * Can be zero if `targetTimestamp` is zero.
     * @return price_ The raw price of the asset returned by Pyth.
     */
    function _getPythPrice(bytes calldata priceUpdateData, uint128 targetTimestamp, uint128 targetLimit)
        internal
        returns (PythStructs.Price memory)
    {
        // parse the price feed update and get the price feed
        bytes32[] memory feedIds = new bytes32[](1);
        feedIds[0] = _pythFeedId;

        bytes[] memory pricesUpdateData = new bytes[](1);
        pricesUpdateData[0] = priceUpdateData;

        uint256 pythFee = _pyth.getUpdateFee(pricesUpdateData);
        // sanity check on the fee requested by Pyth
        if (pythFee > 0.01 ether) {
            revert OracleMiddlewarePythFeeSafeguard(pythFee);
        }
        if (msg.value != pythFee) {
            revert OracleMiddlewareIncorrectFee();
        }

        PythStructs.PriceFeed[] memory priceFeeds;
        if (targetTimestamp == 0) {
            // we want to validate that the price is recent
            // we don't enforce that the price update is the first one in a given second
            // slither-disable-next-line arbitrary-send-eth
            priceFeeds = _pyth.parsePriceFeedUpdates{ value: pythFee }(
                pricesUpdateData, feedIds, uint64(block.timestamp) - _pythRecentPriceDelay, uint64(block.timestamp)
            );
        } else {
            // we want to validate that the price is exactly at `targetTimestamp` (first in the second) or the next
            // available price in the future, as identified by the prevPublishTime being strictly less than
            // targetTimestamp
            // we add a sanity check that this price update cannot be too late (more than `_lowLatencyDelay` seconds
            // late) compared to the desired targetTimestamp
            priceFeeds = _pyth.parsePriceFeedUpdatesUnique{ value: pythFee }(
                pricesUpdateData, feedIds, uint64(targetTimestamp), uint64(targetLimit)
            );
        }

        if (priceFeeds[0].price.price <= 0) {
            revert OracleMiddlewareWrongPrice(priceFeeds[0].price.price);
        }

        return priceFeeds[0].price;
    }

    /**
     * @notice Gets the price of the asset from Pyth, formatted to the specified number of decimals.
     * @param priceUpdateData The data required to update the price feed.
     * @param targetTimestamp The timestamp of the price in the given `priceUpdateData`.
     * If zero, then we accept all recent prices.
     * @param middlewareDecimals The number of decimals to format the price to.
     * @param targetLimit The most recent timestamp a price can have.
     * Can be zero if `targetTimestamp` is zero.
     * @return price_ The Pyth price formatted with `middlewareDecimals`.
     */
    function _getFormattedPythPrice(
        bytes calldata priceUpdateData,
        uint128 targetTimestamp,
        uint256 middlewareDecimals,
        uint128 targetLimit
    ) internal returns (FormattedPythPrice memory price_) {
        // this call checks that the price is strictly positive
        PythStructs.Price memory pythPrice = _getPythPrice(priceUpdateData, targetTimestamp, targetLimit);

        if (pythPrice.expo > 0) {
            revert OracleMiddlewarePythPositiveExponent(pythPrice.expo);
        }

        price_ = _formatPythPrice(pythPrice, middlewareDecimals);
    }

    /**
     * @notice Formats a Pyth price object to normalize to the specified number of decimals.
     * @param pythPrice A Pyth price object.
     * @param middlewareDecimals The number of decimals to format the price to.
     * @return price_ The Pyth price formatted with `middlewareDecimals`.
     */
    function _formatPythPrice(PythStructs.Price memory pythPrice, uint256 middlewareDecimals)
        internal
        pure
        returns (FormattedPythPrice memory price_)
    {
        uint256 pythDecimals = uint32(-pythPrice.expo);

        price_ = FormattedPythPrice({
            price: uint256(int256(pythPrice.price)) * 10 ** middlewareDecimals / 10 ** pythDecimals,
            conf: uint256(pythPrice.conf) * 10 ** middlewareDecimals / 10 ** pythDecimals,
            publishTime: pythPrice.publishTime
        });
    }

    /**
     * @notice Gets the fee required to update the price feed.
     * @param priceUpdateData The data required to update the price feed.
     * @return updateFee_ The fee required to update the price feed.
     */
    function _getPythUpdateFee(bytes calldata priceUpdateData) internal view returns (uint256) {
        bytes[] memory pricesUpdateData = new bytes[](1);
        pricesUpdateData[0] = priceUpdateData;

        return _pyth.getUpdateFee(pricesUpdateData);
    }

    /**
     * @notice Gets the latest seen (cached) price from the Pyth contract.
     * @param middlewareDecimals The number of decimals for the returned price.
     * @return price_ The formatted cached Pyth price, or all-zero values if there was no valid Pyth price on-chain.
     */
    function _getLatestStoredPythPrice(uint256 middlewareDecimals)
        internal
        view
        returns (FormattedPythPrice memory price_)
    {
        // we use getPriceUnsafe to get the latest price without reverting, no matter how old
        PythStructs.Price memory pythPrice;
        // if the proxy implementation changes, this can revert
        try _pyth.getPriceUnsafe(_pythFeedId) returns (PythStructs.Price memory unsafePrice_) {
            pythPrice = unsafePrice_;
        } catch { }

        // negative or zero prices are considered invalid, we return zero
        if (pythPrice.price <= 0) {
            return price_;
        }

        if (pythPrice.expo > 0) {
            revert OracleMiddlewarePythPositiveExponent(pythPrice.expo);
        }

        price_ = _formatPythPrice(pythPrice, middlewareDecimals);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.20;

/**
 * @dev Interface of the ERC-20 standard as defined in the ERC.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

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

    /**
     * @dev Returns the value of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

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

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

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

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

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

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

/// @notice Library for bit twiddling and boolean operations.
/// @author Solady (https://github.com/vectorized/solady/blob/main/src/utils/LibBit.sol)
/// @author Inspired by (https://graphics.stanford.edu/~seander/bithacks.html)
library LibBit {
    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                  BIT TWIDDLING OPERATIONS                  */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev Find last set.
    /// Returns the index of the most significant bit of `x`,
    /// counting from the least significant bit position.
    /// If `x` is zero, returns 256.
    function fls(uint256 x) internal pure returns (uint256 r) {
        /// @solidity memory-safe-assembly
        assembly {
            r := or(shl(8, iszero(x)), shl(7, lt(0xffffffffffffffffffffffffffffffff, x)))
            r := or(r, shl(6, lt(0xffffffffffffffff, shr(r, x))))
            r := or(r, shl(5, lt(0xffffffff, shr(r, x))))
            r := or(r, shl(4, lt(0xffff, shr(r, x))))
            r := or(r, shl(3, lt(0xff, shr(r, x))))
            // forgefmt: disable-next-item
            r := or(r, byte(and(0x1f, shr(shr(r, x), 0x8421084210842108cc6318c6db6d54be)),
                0x0706060506020504060203020504030106050205030304010505030400000000))
        }
    }

    /// @dev Count leading zeros.
    /// Returns the number of zeros preceding the most significant one bit.
    /// If `x` is zero, returns 256.
    function clz(uint256 x) internal pure returns (uint256 r) {
        /// @solidity memory-safe-assembly
        assembly {
            r := shl(7, lt(0xffffffffffffffffffffffffffffffff, x))
            r := or(r, shl(6, lt(0xffffffffffffffff, shr(r, x))))
            r := or(r, shl(5, lt(0xffffffff, shr(r, x))))
            r := or(r, shl(4, lt(0xffff, shr(r, x))))
            r := or(r, shl(3, lt(0xff, shr(r, x))))
            // forgefmt: disable-next-item
            r := add(xor(r, byte(and(0x1f, shr(shr(r, x), 0x8421084210842108cc6318c6db6d54be)),
                0xf8f9f9faf9fdfafbf9fdfcfdfafbfcfef9fafdfafcfcfbfefafafcfbffffffff)), iszero(x))
        }
    }

    /// @dev Find first set.
    /// Returns the index of the least significant bit of `x`,
    /// counting from the least significant bit position.
    /// If `x` is zero, returns 256.
    /// Equivalent to `ctz` (count trailing zeros), which gives
    /// the number of zeros following the least significant one bit.
    function ffs(uint256 x) internal pure returns (uint256 r) {
        /// @solidity memory-safe-assembly
        assembly {
            // Isolate the least significant bit.
            x := and(x, add(not(x), 1))
            // For the upper 3 bits of the result, use a De Bruijn-like lookup.
            // Credit to adhusson: https://blog.adhusson.com/cheap-find-first-set-evm/
            // forgefmt: disable-next-item
            r := shl(5, shr(252, shl(shl(2, shr(250, mul(x,
                0xb6db6db6ddddddddd34d34d349249249210842108c6318c639ce739cffffffff))),
                0x8040405543005266443200005020610674053026020000107506200176117077)))
            // For the lower 5 bits of the result, use a De Bruijn lookup.
            // forgefmt: disable-next-item
            r := or(r, byte(and(div(0xd76453e0, shr(r, x)), 0x1f),
                0x001f0d1e100c1d070f090b19131c1706010e11080a1a141802121b1503160405))
        }
    }

    /// @dev Returns the number of set bits in `x`.
    function popCount(uint256 x) internal pure returns (uint256 c) {
        /// @solidity memory-safe-assembly
        assembly {
            let max := not(0)
            let isMax := eq(x, max)
            x := sub(x, and(shr(1, x), div(max, 3)))
            x := add(and(x, div(max, 5)), and(shr(2, x), div(max, 5)))
            x := and(add(x, shr(4, x)), div(max, 17))
            c := or(shl(8, isMax), shr(248, mul(x, div(max, 255))))
        }
    }

    /// @dev Returns whether `x` is a power of 2.
    function isPo2(uint256 x) internal pure returns (bool result) {
        /// @solidity memory-safe-assembly
        assembly {
            // Equivalent to `x && !(x & (x - 1))`.
            result := iszero(add(and(x, sub(x, 1)), iszero(x)))
        }
    }

    /// @dev Returns `x` reversed at the bit level.
    function reverseBits(uint256 x) internal pure returns (uint256 r) {
        uint256 m0 = 0x0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f;
        uint256 m1 = m0 ^ (m0 << 2);
        uint256 m2 = m1 ^ (m1 << 1);
        r = reverseBytes(x);
        r = (m2 & (r >> 1)) | ((m2 & r) << 1);
        r = (m1 & (r >> 2)) | ((m1 & r) << 2);
        r = (m0 & (r >> 4)) | ((m0 & r) << 4);
    }

    /// @dev Returns `x` reversed at the byte level.
    function reverseBytes(uint256 x) internal pure returns (uint256 r) {
        unchecked {
            // Computing masks on-the-fly reduces bytecode size by about 200 bytes.
            uint256 m0 = 0x100000000000000000000000000000001 * (~toUint(x == uint256(0)) >> 192);
            uint256 m1 = m0 ^ (m0 << 32);
            uint256 m2 = m1 ^ (m1 << 16);
            uint256 m3 = m2 ^ (m2 << 8);
            r = (m3 & (x >> 8)) | ((m3 & x) << 8);
            r = (m2 & (r >> 16)) | ((m2 & r) << 16);
            r = (m1 & (r >> 32)) | ((m1 & r) << 32);
            r = (m0 & (r >> 64)) | ((m0 & r) << 64);
            r = (r >> 128) | (r << 128);
        }
    }

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                     BOOLEAN OPERATIONS                     */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    // A Solidity bool on the stack or memory is represented as a 256-bit word.
    // Non-zero values are true, zero is false.
    // A clean bool is either 0 (false) or 1 (true) under the hood.
    // Usually, if not always, the bool result of a regular Solidity expression,
    // or the argument of a public/external function will be a clean bool.
    // You can usually use the raw variants for more performance.
    // If uncertain, test (best with exact compiler settings).
    // Or use the non-raw variants (compiler can sometimes optimize out the double `iszero`s).

    /// @dev Returns `x & y`. Inputs must be clean.
    function rawAnd(bool x, bool y) internal pure returns (bool z) {
        /// @solidity memory-safe-assembly
        assembly {
            z := and(x, y)
        }
    }

    /// @dev Returns `x & y`.
    function and(bool x, bool y) internal pure returns (bool z) {
        /// @solidity memory-safe-assembly
        assembly {
            z := and(iszero(iszero(x)), iszero(iszero(y)))
        }
    }

    /// @dev Returns `x | y`. Inputs must be clean.
    function rawOr(bool x, bool y) internal pure returns (bool z) {
        /// @solidity memory-safe-assembly
        assembly {
            z := or(x, y)
        }
    }

    /// @dev Returns `x | y`.
    function or(bool x, bool y) internal pure returns (bool z) {
        /// @solidity memory-safe-assembly
        assembly {
            z := or(iszero(iszero(x)), iszero(iszero(y)))
        }
    }

    /// @dev Returns 1 if `b` is true, else 0. Input must be clean.
    function rawToUint(bool b) internal pure returns (uint256 z) {
        /// @solidity memory-safe-assembly
        assembly {
            z := b
        }
    }

    /// @dev Returns 1 if `b` is true, else 0.
    function toUint(bool b) internal pure returns (uint256 z) {
        /// @solidity memory-safe-assembly
        assembly {
            z := iszero(iszero(b))
        }
    }
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;

/**
 * @title Rebalancer Types
 * @notice Defines all custom types used by the Rebalancer contract.
 */
interface IRebalancerTypes {
    /**
     * @notice Represents the deposit data of a user.
     * @dev A value of zero for `initiateTimestamp` indicates that the deposit or withdrawal has been validated.
     * @param initiateTimestamp The timestamp when the deposit or withdrawal was initiated.
     * @param amount The amount of assets deposited by the user.
     * @param entryPositionVersion The version of the position the user entered.
     */
    struct UserDeposit {
        uint40 initiateTimestamp;
        uint88 amount; // maximum 309'485'009 tokens with 18 decimals
        uint128 entryPositionVersion;
    }

    /**
     * @notice Represents data for a specific version of a position.
     * @dev The difference between `amount` here and the amount saved in the USDN protocol is the liquidation bonus.
     * @param amount The amount of assets used as collateral to open the position.
     * @param tick The tick of the position.
     * @param tickVersion The version of the tick.
     * @param index The index of the position in the tick list.
     * @param entryAccMultiplier The accumulated PnL multiplier of all positions up to this one.
     */
    struct PositionData {
        uint128 amount;
        int24 tick;
        uint256 tickVersion;
        uint256 index;
        uint256 entryAccMultiplier;
    }

    /**
     * @notice Defines parameters related to the validation process for rebalancer deposits and withdrawals.
     * @dev If `validationDeadline` has passed, the user must wait until the cooldown duration has elapsed. Then, for
     * deposit actions, the user must retrieve its funds using {IRebalancer.resetDepositAssets}. For withdrawal actions,
     * the user can simply initiate a new withdrawal.
     * @param validationDelay The minimum duration in seconds between an initiate action and the corresponding validate
     * action.
     * @param validationDeadline The maximum duration in seconds between an initiate action and the corresponding
     * validate action.
     * @param actionCooldown The duration in seconds from the initiate action during which the user can't interact with
     * the rebalancer if the `validationDeadline` is exceeded.
     * @param closeDelay The Duration in seconds from the last rebalancer long position opening during which the user
     * can't perform an {IRebalancer.initiateClosePosition}.
     */
    struct TimeLimits {
        uint64 validationDelay;
        uint64 validationDeadline;
        uint64 actionCooldown;
        uint64 closeDelay;
    }
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;

interface IRebaseCallback {
    /**
     * @notice Called by the USDN token after a rebase has happened.
     * @param oldDivisor The value of the divisor before the rebase.
     * @param newDivisor The value of the divisor after the rebase (necessarily smaller than `oldDivisor`).
     * @return result_ Arbitrary data that will be forwarded to the caller of `rebase`.
     */
    function rebaseCallback(uint256 oldDivisor, uint256 newDivisor) external returns (bytes memory result_);
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;

/**
 * @title Errors for the USDN token contract
 * @notice Defines all custom errors emitted by the USDN token contract.
 */
interface IUsdnErrors {
    /**
     * @dev The amount of tokens exceeds the maximum allowed limit.
     * @param value The invalid token value.
     */
    error UsdnMaxTokensExceeded(uint256 value);

    /**
     * @dev The sender's share balance is insufficient.
     * @param sender The sender's address.
     * @param balance The current share balance of the sender.
     * @param needed The required amount of shares for the transfer.
     */
    error UsdnInsufficientSharesBalance(address sender, uint256 balance, uint256 needed);

    /// @dev The divisor value in storage is invalid (< 1).
    error UsdnInvalidDivisor();
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;

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

/**
 * @title Events for the USDN token contract
 * @notice Defines all custom events emitted by the USDN token contract.
 */
interface IUsdnEvents {
    /**
     * @notice The divisor was updated, emitted during a rebase.
     * @param oldDivisor The divisor value before the rebase.
     * @param newDivisor The new divisor value.
     */
    event Rebase(uint256 oldDivisor, uint256 newDivisor);

    /**
     * @notice The rebase handler address was updated.
     * @dev The rebase handler is a contract that is called when a rebase occurs.
     * @param newHandler The address of the new rebase handler contract.
     */
    event RebaseHandlerUpdated(IRebaseCallback newHandler);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (access/extensions/IAccessControlDefaultAdminRules.sol)

pragma solidity ^0.8.20;

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

/**
 * @dev External interface of AccessControlDefaultAdminRules declared to support ERC-165 detection.
 */
interface IAccessControlDefaultAdminRules is IAccessControl {
    /**
     * @dev The new default admin is not a valid default admin.
     */
    error AccessControlInvalidDefaultAdmin(address defaultAdmin);

    /**
     * @dev At least one of the following rules was violated:
     *
     * - The `DEFAULT_ADMIN_ROLE` must only be managed by itself.
     * - The `DEFAULT_ADMIN_ROLE` must only be held by one account at the time.
     * - Any `DEFAULT_ADMIN_ROLE` transfer must be in two delayed steps.
     */
    error AccessControlEnforcedDefaultAdminRules();

    /**
     * @dev The delay for transferring the default admin delay is enforced and
     * the operation must wait until `schedule`.
     *
     * NOTE: `schedule` can be 0 indicating there's no transfer scheduled.
     */
    error AccessControlEnforcedDefaultAdminDelay(uint48 schedule);

    /**
     * @dev Emitted when a {defaultAdmin} transfer is started, setting `newAdmin` as the next
     * address to become the {defaultAdmin} by calling {acceptDefaultAdminTransfer} only after `acceptSchedule`
     * passes.
     */
    event DefaultAdminTransferScheduled(address indexed newAdmin, uint48 acceptSchedule);

    /**
     * @dev Emitted when a {pendingDefaultAdmin} is reset if it was never accepted, regardless of its schedule.
     */
    event DefaultAdminTransferCanceled();

    /**
     * @dev Emitted when a {defaultAdminDelay} change is started, setting `newDelay` as the next
     * delay to be applied between default admin transfer after `effectSchedule` has passed.
     */
    event DefaultAdminDelayChangeScheduled(uint48 newDelay, uint48 effectSchedule);

    /**
     * @dev Emitted when a {pendingDefaultAdminDelay} is reset if its schedule didn't pass.
     */
    event DefaultAdminDelayChangeCanceled();

    /**
     * @dev Returns the address of the current `DEFAULT_ADMIN_ROLE` holder.
     */
    function defaultAdmin() external view returns (address);

    /**
     * @dev Returns a tuple of a `newAdmin` and an accept schedule.
     *
     * After the `schedule` passes, the `newAdmin` will be able to accept the {defaultAdmin} role
     * by calling {acceptDefaultAdminTransfer}, completing the role transfer.
     *
     * A zero value only in `acceptSchedule` indicates no pending admin transfer.
     *
     * NOTE: A zero address `newAdmin` means that {defaultAdmin} is being renounced.
     */
    function pendingDefaultAdmin() external view returns (address newAdmin, uint48 acceptSchedule);

    /**
     * @dev Returns the delay required to schedule the acceptance of a {defaultAdmin} transfer started.
     *
     * This delay will be added to the current timestamp when calling {beginDefaultAdminTransfer} to set
     * the acceptance schedule.
     *
     * NOTE: If a delay change has been scheduled, it will take effect as soon as the schedule passes, making this
     * function returns the new delay. See {changeDefaultAdminDelay}.
     */
    function defaultAdminDelay() external view returns (uint48);

    /**
     * @dev Returns a tuple of `newDelay` and an effect schedule.
     *
     * After the `schedule` passes, the `newDelay` will get into effect immediately for every
     * new {defaultAdmin} transfer started with {beginDefaultAdminTransfer}.
     *
     * A zero value only in `effectSchedule` indicates no pending delay change.
     *
     * NOTE: A zero value only for `newDelay` means that the next {defaultAdminDelay}
     * will be zero after the effect schedule.
     */
    function pendingDefaultAdminDelay() external view returns (uint48 newDelay, uint48 effectSchedule);

    /**
     * @dev Starts a {defaultAdmin} transfer by setting a {pendingDefaultAdmin} scheduled for acceptance
     * after the current timestamp plus a {defaultAdminDelay}.
     *
     * Requirements:
     *
     * - Only can be called by the current {defaultAdmin}.
     *
     * Emits a DefaultAdminRoleChangeStarted event.
     */
    function beginDefaultAdminTransfer(address newAdmin) external;

    /**
     * @dev Cancels a {defaultAdmin} transfer previously started with {beginDefaultAdminTransfer}.
     *
     * A {pendingDefaultAdmin} not yet accepted can also be cancelled with this function.
     *
     * Requirements:
     *
     * - Only can be called by the current {defaultAdmin}.
     *
     * May emit a DefaultAdminTransferCanceled event.
     */
    function cancelDefaultAdminTransfer() external;

    /**
     * @dev Completes a {defaultAdmin} transfer previously started with {beginDefaultAdminTransfer}.
     *
     * After calling the function:
     *
     * - `DEFAULT_ADMIN_ROLE` should be granted to the caller.
     * - `DEFAULT_ADMIN_ROLE` should be revoked from the previous holder.
     * - {pendingDefaultAdmin} should be reset to zero values.
     *
     * Requirements:
     *
     * - Only can be called by the {pendingDefaultAdmin}'s `newAdmin`.
     * - The {pendingDefaultAdmin}'s `acceptSchedule` should've passed.
     */
    function acceptDefaultAdminTransfer() external;

    /**
     * @dev Initiates a {defaultAdminDelay} update by setting a {pendingDefaultAdminDelay} scheduled for getting
     * into effect after the current timestamp plus a {defaultAdminDelay}.
     *
     * This function guarantees that any call to {beginDefaultAdminTransfer} done between the timestamp this
     * method is called and the {pendingDefaultAdminDelay} effect schedule will use the current {defaultAdminDelay}
     * set before calling.
     *
     * The {pendingDefaultAdminDelay}'s effect schedule is defined in a way that waiting until the schedule and then
     * calling {beginDefaultAdminTransfer} with the new delay will take at least the same as another {defaultAdmin}
     * complete transfer (including acceptance).
     *
     * The schedule is designed for two scenarios:
     *
     * - When the delay is changed for a larger one the schedule is `block.timestamp + newDelay` capped by
     * {defaultAdminDelayIncreaseWait}.
     * - When the delay is changed for a shorter one, the schedule is `block.timestamp + (current delay - new delay)`.
     *
     * A {pendingDefaultAdminDelay} that never got into effect will be canceled in favor of a new scheduled change.
     *
     * Requirements:
     *
     * - Only can be called by the current {defaultAdmin}.
     *
     * Emits a DefaultAdminDelayChangeScheduled event and may emit a DefaultAdminDelayChangeCanceled event.
     */
    function changeDefaultAdminDelay(uint48 newDelay) external;

    /**
     * @dev Cancels a scheduled {defaultAdminDelay} change.
     *
     * Requirements:
     *
     * - Only can be called by the current {defaultAdmin}.
     *
     * May emit a DefaultAdminDelayChangeCanceled event.
     */
    function rollbackDefaultAdminDelay() external;

    /**
     * @dev Maximum time in seconds for an increase to {defaultAdminDelay} (that is scheduled using {changeDefaultAdminDelay})
     * to take effect. Default to 5 days.
     *
     * When the {defaultAdminDelay} is scheduled to be increased, it goes into effect after the new delay has passed with
     * the purpose of giving enough time for reverting any accidental change (i.e. using milliseconds instead of seconds)
     * that may lock the contract. However, to avoid excessive schedules, the wait is capped by this function and it can
     * be overrode for a custom {defaultAdminDelay} increase scheduling.
     *
     * IMPORTANT: Make sure to add a reasonable amount of time while overriding this value, otherwise,
     * there's a risk of setting a high new delay that goes into effect almost immediately without the
     * possibility of human intervention in the case of an input error (eg. set milliseconds instead of seconds).
     */
    function defaultAdminDelayIncreaseWait() external view returns (uint48);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (access/AccessControl.sol)

pragma solidity ^0.8.20;

import {IAccessControl} from "./IAccessControl.sol";
import {Context} from "../utils/Context.sol";
import {ERC165} from "../utils/introspection/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:
 *
 * ```solidity
 * 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}:
 *
 * ```solidity
 * 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. We recommend using {AccessControlDefaultAdminRules}
 * to enforce additional security measures for this role.
 */
abstract contract AccessControl is Context, IAccessControl, ERC165 {
    struct RoleData {
        mapping(address account => bool) hasRole;
        bytes32 adminRole;
    }

    mapping(bytes32 role => RoleData) private _roles;

    bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;

    /**
     * @dev Modifier that checks that an account has a specific role. Reverts
     * with an {AccessControlUnauthorizedAccount} error including the required role.
     */
    modifier onlyRole(bytes32 role) {
        _checkRole(role);
        _;
    }

    /**
     * @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 returns (bool) {
        return _roles[role].hasRole[account];
    }

    /**
     * @dev Reverts with an {AccessControlUnauthorizedAccount} error if `_msgSender()`
     * is missing `role`. Overriding this function changes the behavior of the {onlyRole} modifier.
     */
    function _checkRole(bytes32 role) internal view virtual {
        _checkRole(role, _msgSender());
    }

    /**
     * @dev Reverts with an {AccessControlUnauthorizedAccount} error if `account`
     * is missing `role`.
     */
    function _checkRole(bytes32 role, address account) internal view virtual {
        if (!hasRole(role, account)) {
            revert AccessControlUnauthorizedAccount(account, role);
        }
    }

    /**
     * @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 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.
     *
     * May emit a {RoleGranted} event.
     */
    function grantRole(bytes32 role, address account) public virtual 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.
     *
     * May emit a {RoleRevoked} event.
     */
    function revokeRole(bytes32 role, address account) public virtual 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 `callerConfirmation`.
     *
     * May emit a {RoleRevoked} event.
     */
    function renounceRole(bytes32 role, address callerConfirmation) public virtual {
        if (callerConfirmation != _msgSender()) {
            revert AccessControlBadConfirmation();
        }

        _revokeRole(role, callerConfirmation);
    }

    /**
     * @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 Attempts to grant `role` to `account` and returns a boolean indicating if `role` was granted.
     *
     * Internal function without access restriction.
     *
     * May emit a {RoleGranted} event.
     */
    function _grantRole(bytes32 role, address account) internal virtual returns (bool) {
        if (!hasRole(role, account)) {
            _roles[role].hasRole[account] = true;
            emit RoleGranted(role, account, _msgSender());
            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Attempts to revoke `role` to `account` and returns a boolean indicating if `role` was revoked.
     *
     * Internal function without access restriction.
     *
     * May emit a {RoleRevoked} event.
     */
    function _revokeRole(bytes32 role, address account) internal virtual returns (bool) {
        if (hasRole(role, account)) {
            _roles[role].hasRole[account] = false;
            emit RoleRevoked(role, account, _msgSender());
            return true;
        } else {
            return false;
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (utils/math/SafeCast.sol)
// This file was procedurally generated from scripts/generate/templates/SafeCast.js.

pragma solidity ^0.8.20;

/**
 * @dev Wrappers over Solidity's uintXX/intXX/bool 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.
 */
library SafeCast {
    /**
     * @dev Value doesn't fit in an uint of `bits` size.
     */
    error SafeCastOverflowedUintDowncast(uint8 bits, uint256 value);

    /**
     * @dev An int value doesn't fit in an uint of `bits` size.
     */
    error SafeCastOverflowedIntToUint(int256 value);

    /**
     * @dev Value doesn't fit in an int of `bits` size.
     */
    error SafeCastOverflowedIntDowncast(uint8 bits, int256 value);

    /**
     * @dev An uint value doesn't fit in an int of `bits` size.
     */
    error SafeCastOverflowedUintToInt(uint256 value);

    /**
     * @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
     */
    function toUint248(uint256 value) internal pure returns (uint248) {
        if (value > type(uint248).max) {
            revert SafeCastOverflowedUintDowncast(248, value);
        }
        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
     */
    function toUint240(uint256 value) internal pure returns (uint240) {
        if (value > type(uint240).max) {
            revert SafeCastOverflowedUintDowncast(240, value);
        }
        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
     */
    function toUint232(uint256 value) internal pure returns (uint232) {
        if (value > type(uint232).max) {
            revert SafeCastOverflowedUintDowncast(232, value);
        }
        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
     */
    function toUint224(uint256 value) internal pure returns (uint224) {
        if (value > type(uint224).max) {
            revert SafeCastOverflowedUintDowncast(224, value);
        }
        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
     */
    function toUint216(uint256 value) internal pure returns (uint216) {
        if (value > type(uint216).max) {
            revert SafeCastOverflowedUintDowncast(216, value);
        }
        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
     */
    function toUint208(uint256 value) internal pure returns (uint208) {
        if (value > type(uint208).max) {
            revert SafeCastOverflowedUintDowncast(208, value);
        }
        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
     */
    function toUint200(uint256 value) internal pure returns (uint200) {
        if (value > type(uint200).max) {
            revert SafeCastOverflowedUintDowncast(200, value);
        }
        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
     */
    function toUint192(uint256 value) internal pure returns (uint192) {
        if (value > type(uint192).max) {
            revert SafeCastOverflowedUintDowncast(192, value);
        }
        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
     */
    function toUint184(uint256 value) internal pure returns (uint184) {
        if (value > type(uint184).max) {
            revert SafeCastOverflowedUintDowncast(184, value);
        }
        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
     */
    function toUint176(uint256 value) internal pure returns (uint176) {
        if (value > type(uint176).max) {
            revert SafeCastOverflowedUintDowncast(176, value);
        }
        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
     */
    function toUint168(uint256 value) internal pure returns (uint168) {
        if (value > type(uint168).max) {
            revert SafeCastOverflowedUintDowncast(168, value);
        }
        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
     */
    function toUint160(uint256 value) internal pure returns (uint160) {
        if (value > type(uint160).max) {
            revert SafeCastOverflowedUintDowncast(160, value);
        }
        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
     */
    function toUint152(uint256 value) internal pure returns (uint152) {
        if (value > type(uint152).max) {
            revert SafeCastOverflowedUintDowncast(152, value);
        }
        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
     */
    function toUint144(uint256 value) internal pure returns (uint144) {
        if (value > type(uint144).max) {
            revert SafeCastOverflowedUintDowncast(144, value);
        }
        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
     */
    function toUint136(uint256 value) internal pure returns (uint136) {
        if (value > type(uint136).max) {
            revert SafeCastOverflowedUintDowncast(136, value);
        }
        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
     */
    function toUint128(uint256 value) internal pure returns (uint128) {
        if (value > type(uint128).max) {
            revert SafeCastOverflowedUintDowncast(128, value);
        }
        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
     */
    function toUint120(uint256 value) internal pure returns (uint120) {
        if (value > type(uint120).max) {
            revert SafeCastOverflowedUintDowncast(120, value);
        }
        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
     */
    function toUint112(uint256 value) internal pure returns (uint112) {
        if (value > type(uint112).max) {
            revert SafeCastOverflowedUintDowncast(112, value);
        }
        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
     */
    function toUint104(uint256 value) internal pure returns (uint104) {
        if (value > type(uint104).max) {
            revert SafeCastOverflowedUintDowncast(104, value);
        }
        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
     */
    function toUint96(uint256 value) internal pure returns (uint96) {
        if (value > type(uint96).max) {
            revert SafeCastOverflowedUintDowncast(96, value);
        }
        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
     */
    function toUint88(uint256 value) internal pure returns (uint88) {
        if (value > type(uint88).max) {
            revert SafeCastOverflowedUintDowncast(88, value);
        }
        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
     */
    function toUint80(uint256 value) internal pure returns (uint80) {
        if (value > type(uint80).max) {
            revert SafeCastOverflowedUintDowncast(80, value);
        }
        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
     */
    function toUint72(uint256 value) internal pure returns (uint72) {
        if (value > type(uint72).max) {
            revert SafeCastOverflowedUintDowncast(72, value);
        }
        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
     */
    function toUint64(uint256 value) internal pure returns (uint64) {
        if (value > type(uint64).max) {
            revert SafeCastOverflowedUintDowncast(64, value);
        }
        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
     */
    function toUint56(uint256 value) internal pure returns (uint56) {
        if (value > type(uint56).max) {
            revert SafeCastOverflowedUintDowncast(56, value);
        }
        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
     */
    function toUint48(uint256 value) internal pure returns (uint48) {
        if (value > type(uint48).max) {
            revert SafeCastOverflowedUintDowncast(48, value);
        }
        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
     */
    function toUint40(uint256 value) internal pure returns (uint40) {
        if (value > type(uint40).max) {
            revert SafeCastOverflowedUintDowncast(40, value);
        }
        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
     */
    function toUint32(uint256 value) internal pure returns (uint32) {
        if (value > type(uint32).max) {
            revert SafeCastOverflowedUintDowncast(32, value);
        }
        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
     */
    function toUint24(uint256 value) internal pure returns (uint24) {
        if (value > type(uint24).max) {
            revert SafeCastOverflowedUintDowncast(24, value);
        }
        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
     */
    function toUint16(uint256 value) internal pure returns (uint16) {
        if (value > type(uint16).max) {
            revert SafeCastOverflowedUintDowncast(16, value);
        }
        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
     */
    function toUint8(uint256 value) internal pure returns (uint8) {
        if (value > type(uint8).max) {
            revert SafeCastOverflowedUintDowncast(8, value);
        }
        return uint8(value);
    }

    /**
     * @dev Converts a signed int256 into an unsigned uint256.
     *
     * Requirements:
     *
     * - input must be greater than or equal to 0.
     */
    function toUint256(int256 value) internal pure returns (uint256) {
        if (value < 0) {
            revert SafeCastOverflowedIntToUint(value);
        }
        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
     */
    function toInt248(int256 value) internal pure returns (int248 downcasted) {
        downcasted = int248(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(248, value);
        }
    }

    /**
     * @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
     */
    function toInt240(int256 value) internal pure returns (int240 downcasted) {
        downcasted = int240(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(240, value);
        }
    }

    /**
     * @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
     */
    function toInt232(int256 value) internal pure returns (int232 downcasted) {
        downcasted = int232(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(232, value);
        }
    }

    /**
     * @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
     */
    function toInt224(int256 value) internal pure returns (int224 downcasted) {
        downcasted = int224(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(224, value);
        }
    }

    /**
     * @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
     */
    function toInt216(int256 value) internal pure returns (int216 downcasted) {
        downcasted = int216(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(216, value);
        }
    }

    /**
     * @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
     */
    function toInt208(int256 value) internal pure returns (int208 downcasted) {
        downcasted = int208(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(208, value);
        }
    }

    /**
     * @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
     */
    function toInt200(int256 value) internal pure returns (int200 downcasted) {
        downcasted = int200(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(200, value);
        }
    }

    /**
     * @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
     */
    function toInt192(int256 value) internal pure returns (int192 downcasted) {
        downcasted = int192(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(192, value);
        }
    }

    /**
     * @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
     */
    function toInt184(int256 value) internal pure returns (int184 downcasted) {
        downcasted = int184(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(184, value);
        }
    }

    /**
     * @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
     */
    function toInt176(int256 value) internal pure returns (int176 downcasted) {
        downcasted = int176(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(176, value);
        }
    }

    /**
     * @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
     */
    function toInt168(int256 value) internal pure returns (int168 downcasted) {
        downcasted = int168(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(168, value);
        }
    }

    /**
     * @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
     */
    function toInt160(int256 value) internal pure returns (int160 downcasted) {
        downcasted = int160(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(160, value);
        }
    }

    /**
     * @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
     */
    function toInt152(int256 value) internal pure returns (int152 downcasted) {
        downcasted = int152(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(152, value);
        }
    }

    /**
     * @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
     */
    function toInt144(int256 value) internal pure returns (int144 downcasted) {
        downcasted = int144(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(144, value);
        }
    }

    /**
     * @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
     */
    function toInt136(int256 value) internal pure returns (int136 downcasted) {
        downcasted = int136(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(136, value);
        }
    }

    /**
     * @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
     */
    function toInt128(int256 value) internal pure returns (int128 downcasted) {
        downcasted = int128(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(128, value);
        }
    }

    /**
     * @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
     */
    function toInt120(int256 value) internal pure returns (int120 downcasted) {
        downcasted = int120(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(120, value);
        }
    }

    /**
     * @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
     */
    function toInt112(int256 value) internal pure returns (int112 downcasted) {
        downcasted = int112(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(112, value);
        }
    }

    /**
     * @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
     */
    function toInt104(int256 value) internal pure returns (int104 downcasted) {
        downcasted = int104(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(104, value);
        }
    }

    /**
     * @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
     */
    function toInt96(int256 value) internal pure returns (int96 downcasted) {
        downcasted = int96(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(96, value);
        }
    }

    /**
     * @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
     */
    function toInt88(int256 value) internal pure returns (int88 downcasted) {
        downcasted = int88(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(88, value);
        }
    }

    /**
     * @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
     */
    function toInt80(int256 value) internal pure returns (int80 downcasted) {
        downcasted = int80(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(80, value);
        }
    }

    /**
     * @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
     */
    function toInt72(int256 value) internal pure returns (int72 downcasted) {
        downcasted = int72(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(72, value);
        }
    }

    /**
     * @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
     */
    function toInt64(int256 value) internal pure returns (int64 downcasted) {
        downcasted = int64(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(64, value);
        }
    }

    /**
     * @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
     */
    function toInt56(int256 value) internal pure returns (int56 downcasted) {
        downcasted = int56(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(56, value);
        }
    }

    /**
     * @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
     */
    function toInt48(int256 value) internal pure returns (int48 downcasted) {
        downcasted = int48(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(48, value);
        }
    }

    /**
     * @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
     */
    function toInt40(int256 value) internal pure returns (int40 downcasted) {
        downcasted = int40(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(40, value);
        }
    }

    /**
     * @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
     */
    function toInt32(int256 value) internal pure returns (int32 downcasted) {
        downcasted = int32(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(32, value);
        }
    }

    /**
     * @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
     */
    function toInt24(int256 value) internal pure returns (int24 downcasted) {
        downcasted = int24(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(24, value);
        }
    }

    /**
     * @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
     */
    function toInt16(int256 value) internal pure returns (int16 downcasted) {
        downcasted = int16(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(16, value);
        }
    }

    /**
     * @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
     */
    function toInt8(int256 value) internal pure returns (int8 downcasted) {
        downcasted = int8(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(8, value);
        }
    }

    /**
     * @dev Converts an unsigned uint256 into a signed int256.
     *
     * Requirements:
     *
     * - input must be less than or equal to maxInt256.
     */
    function toInt256(uint256 value) internal pure returns (int256) {
        // Note: Unsafe cast below is okay because `type(int256).max` is guaranteed to be positive
        if (value > uint256(type(int256).max)) {
            revert SafeCastOverflowedUintToInt(value);
        }
        return int256(value);
    }

    /**
     * @dev Cast a boolean (false or true) to a uint256 (0 or 1) with no jump.
     */
    function toUint(bool b) internal pure returns (uint256 u) {
        assembly ("memory-safe") {
            u := iszero(iszero(b))
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (utils/math/Math.sol)

pragma solidity ^0.8.20;

import {Panic} from "../Panic.sol";
import {SafeCast} from "./SafeCast.sol";

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library Math {
    enum Rounding {
        Floor, // Toward negative infinity
        Ceil, // Toward positive infinity
        Trunc, // Toward zero
        Expand // Away from zero
    }

    /**
     * @dev Returns the addition of two unsigned integers, with an success flag (no overflow).
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool success, uint256 result) {
        unchecked {
            uint256 c = a + b;
            if (c < a) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, with an success flag (no overflow).
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool success, uint256 result) {
        unchecked {
            if (b > a) return (false, 0);
            return (true, a - b);
        }
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an success flag (no overflow).
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool success, uint256 result) {
        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 success flag (no division by zero).
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool success, uint256 result) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a / b);
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a success flag (no division by zero).
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool success, uint256 result) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a % b);
        }
    }

    /**
     * @dev Branchless ternary evaluation for `a ? b : c`. Gas costs are constant.
     *
     * IMPORTANT: This function may reduce bytecode size and consume less gas when used standalone.
     * However, the compiler may optimize Solidity ternary operations (i.e. `a ? b : c`) to only compute
     * one branch when needed, making this function more expensive.
     */
    function ternary(bool condition, uint256 a, uint256 b) internal pure returns (uint256) {
        unchecked {
            // branchless ternary works because:
            // b ^ (a ^ b) == a
            // b ^ 0 == b
            return b ^ ((a ^ b) * SafeCast.toUint(condition));
        }
    }

    /**
     * @dev Returns the largest of two numbers.
     */
    function max(uint256 a, uint256 b) internal pure returns (uint256) {
        return ternary(a > b, a, b);
    }

    /**
     * @dev Returns the smallest of two numbers.
     */
    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        return ternary(a < b, a, b);
    }

    /**
     * @dev Returns the average of two numbers. The result is rounded towards
     * zero.
     */
    function average(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b) / 2 can overflow.
        return (a & b) + (a ^ b) / 2;
    }

    /**
     * @dev Returns the ceiling of the division of two numbers.
     *
     * This differs from standard division with `/` in that it rounds towards infinity instead
     * of rounding towards zero.
     */
    function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
        if (b == 0) {
            // Guarantee the same behavior as in a regular Solidity division.
            Panic.panic(Panic.DIVISION_BY_ZERO);
        }

        // The following calculation ensures accurate ceiling division without overflow.
        // Since a is non-zero, (a - 1) / b will not overflow.
        // The largest possible result occurs when (a - 1) / b is type(uint256).max,
        // but the largest value we can obtain is type(uint256).max - 1, which happens
        // when a = type(uint256).max and b = 1.
        unchecked {
            return SafeCast.toUint(a > 0) * ((a - 1) / b + 1);
        }
    }

    /**
     * @dev Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or
     * denominator == 0.
     *
     * Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv) with further edits by
     * Uniswap Labs also under MIT license.
     */
    function mulDiv(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result) {
        unchecked {
            // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2²⁵⁶ and mod 2²⁵⁶ - 1, then use
            // the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256
            // variables such that product = prod1 * 2²⁵⁶ + prod0.
            uint256 prod0 = x * y; // Least significant 256 bits of the product
            uint256 prod1; // Most significant 256 bits of the product
            assembly {
                let mm := mulmod(x, y, not(0))
                prod1 := sub(sub(mm, prod0), lt(mm, prod0))
            }

            // Handle non-overflow cases, 256 by 256 division.
            if (prod1 == 0) {
                // Solidity will revert if denominator == 0, unlike the div opcode on its own.
                // The surrounding unchecked block does not change this fact.
                // See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic.
                return prod0 / denominator;
            }

            // Make sure the result is less than 2²⁵⁶. Also prevents denominator == 0.
            if (denominator <= prod1) {
                Panic.panic(ternary(denominator == 0, Panic.DIVISION_BY_ZERO, Panic.UNDER_OVERFLOW));
            }

            ///////////////////////////////////////////////
            // 512 by 256 division.
            ///////////////////////////////////////////////

            // Make division exact by subtracting the remainder from [prod1 prod0].
            uint256 remainder;
            assembly {
                // Compute remainder using mulmod.
                remainder := mulmod(x, y, denominator)

                // Subtract 256 bit number from 512 bit number.
                prod1 := sub(prod1, gt(remainder, prod0))
                prod0 := sub(prod0, remainder)
            }

            // Factor powers of two out of denominator and compute largest power of two divisor of denominator.
            // Always >= 1. See https://cs.stackexchange.com/q/138556/92363.

            uint256 twos = denominator & (0 - denominator);
            assembly {
                // Divide denominator by twos.
                denominator := div(denominator, twos)

                // Divide [prod1 prod0] by twos.
                prod0 := div(prod0, twos)

                // Flip twos such that it is 2²⁵⁶ / twos. If twos is zero, then it becomes one.
                twos := add(div(sub(0, twos), twos), 1)
            }

            // Shift in bits from prod1 into prod0.
            prod0 |= prod1 * twos;

            // Invert denominator mod 2²⁵⁶. Now that denominator is an odd number, it has an inverse modulo 2²⁵⁶ such
            // that denominator * inv ≡ 1 mod 2²⁵⁶. Compute the inverse by starting with a seed that is correct for
            // four bits. That is, denominator * inv ≡ 1 mod 2⁴.
            uint256 inverse = (3 * denominator) ^ 2;

            // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also
            // works in modular arithmetic, doubling the correct bits in each step.
            inverse *= 2 - denominator * inverse; // inverse mod 2⁸
            inverse *= 2 - denominator * inverse; // inverse mod 2¹⁶
            inverse *= 2 - denominator * inverse; // inverse mod 2³²
            inverse *= 2 - denominator * inverse; // inverse mod 2⁶⁴
            inverse *= 2 - denominator * inverse; // inverse mod 2¹²⁸
            inverse *= 2 - denominator * inverse; // inverse mod 2²⁵⁶

            // Because the division is now exact we can divide by multiplying with the modular inverse of denominator.
            // This will give us the correct result modulo 2²⁵⁶. Since the preconditions guarantee that the outcome is
            // less than 2²⁵⁶, this is the final result. We don't need to compute the high bits of the result and prod1
            // is no longer required.
            result = prod0 * inverse;
            return result;
        }
    }

    /**
     * @dev Calculates x * y / denominator with full precision, following the selected rounding direction.
     */
    function mulDiv(uint256 x, uint256 y, uint256 denominator, Rounding rounding) internal pure returns (uint256) {
        return mulDiv(x, y, denominator) + SafeCast.toUint(unsignedRoundsUp(rounding) && mulmod(x, y, denominator) > 0);
    }

    /**
     * @dev Calculate the modular multiplicative inverse of a number in Z/nZ.
     *
     * If n is a prime, then Z/nZ is a field. In that case all elements are inversible, except 0.
     * If n is not a prime, then Z/nZ is not a field, and some elements might not be inversible.
     *
     * If the input value is not inversible, 0 is returned.
     *
     * NOTE: If you know for sure that n is (big) a prime, it may be cheaper to use Fermat's little theorem and get the
     * inverse using `Math.modExp(a, n - 2, n)`. See {invModPrime}.
     */
    function invMod(uint256 a, uint256 n) internal pure returns (uint256) {
        unchecked {
            if (n == 0) return 0;

            // The inverse modulo is calculated using the Extended Euclidean Algorithm (iterative version)
            // Used to compute integers x and y such that: ax + ny = gcd(a, n).
            // When the gcd is 1, then the inverse of a modulo n exists and it's x.
            // ax + ny = 1
            // ax = 1 + (-y)n
            // ax ≡ 1 (mod n) # x is the inverse of a modulo n

            // If the remainder is 0 the gcd is n right away.
            uint256 remainder = a % n;
            uint256 gcd = n;

            // Therefore the initial coefficients are:
            // ax + ny = gcd(a, n) = n
            // 0a + 1n = n
            int256 x = 0;
            int256 y = 1;

            while (remainder != 0) {
                uint256 quotient = gcd / remainder;

                (gcd, remainder) = (
                    // The old remainder is the next gcd to try.
                    remainder,
                    // Compute the next remainder.
                    // Can't overflow given that (a % gcd) * (gcd // (a % gcd)) <= gcd
                    // where gcd is at most n (capped to type(uint256).max)
                    gcd - remainder * quotient
                );

                (x, y) = (
                    // Increment the coefficient of a.
                    y,
                    // Decrement the coefficient of n.
                    // Can overflow, but the result is casted to uint256 so that the
                    // next value of y is "wrapped around" to a value between 0 and n - 1.
                    x - y * int256(quotient)
                );
            }

            if (gcd != 1) return 0; // No inverse exists.
            return ternary(x < 0, n - uint256(-x), uint256(x)); // Wrap the result if it's negative.
        }
    }

    /**
     * @dev Variant of {invMod}. More efficient, but only works if `p` is known to be a prime greater than `2`.
     *
     * From https://en.wikipedia.org/wiki/Fermat%27s_little_theorem[Fermat's little theorem], we know that if p is
     * prime, then `a**(p-1) ≡ 1 mod p`. As a consequence, we have `a * a**(p-2) ≡ 1 mod p`, which means that
     * `a**(p-2)` is the modular multiplicative inverse of a in Fp.
     *
     * NOTE: this function does NOT check that `p` is a prime greater than `2`.
     */
    function invModPrime(uint256 a, uint256 p) internal view returns (uint256) {
        unchecked {
            return Math.modExp(a, p - 2, p);
        }
    }

    /**
     * @dev Returns the modular exponentiation of the specified base, exponent and modulus (b ** e % m)
     *
     * Requirements:
     * - modulus can't be zero
     * - underlying staticcall to precompile must succeed
     *
     * IMPORTANT: The result is only valid if the underlying call succeeds. When using this function, make
     * sure the chain you're using it on supports the precompiled contract for modular exponentiation
     * at address 0x05 as specified in https://eips.ethereum.org/EIPS/eip-198[EIP-198]. Otherwise,
     * the underlying function will succeed given the lack of a revert, but the result may be incorrectly
     * interpreted as 0.
     */
    function modExp(uint256 b, uint256 e, uint256 m) internal view returns (uint256) {
        (bool success, uint256 result) = tryModExp(b, e, m);
        if (!success) {
            Panic.panic(Panic.DIVISION_BY_ZERO);
        }
        return result;
    }

    /**
     * @dev Returns the modular exponentiation of the specified base, exponent and modulus (b ** e % m).
     * It includes a success flag indicating if the operation succeeded. Operation will be marked as failed if trying
     * to operate modulo 0 or if the underlying precompile reverted.
     *
     * IMPORTANT: The result is only valid if the success flag is true. When using this function, make sure the chain
     * you're using it on supports the precompiled contract for modular exponentiation at address 0x05 as specified in
     * https://eips.ethereum.org/EIPS/eip-198[EIP-198]. Otherwise, the underlying function will succeed given the lack
     * of a revert, but the result may be incorrectly interpreted as 0.
     */
    function tryModExp(uint256 b, uint256 e, uint256 m) internal view returns (bool success, uint256 result) {
        if (m == 0) return (false, 0);
        assembly ("memory-safe") {
            let ptr := mload(0x40)
            // | Offset    | Content    | Content (Hex)                                                      |
            // |-----------|------------|--------------------------------------------------------------------|
            // | 0x00:0x1f | size of b  | 0x0000000000000000000000000000000000000000000000000000000000000020 |
            // | 0x20:0x3f | size of e  | 0x0000000000000000000000000000000000000000000000000000000000000020 |
            // | 0x40:0x5f | size of m  | 0x0000000000000000000000000000000000000000000000000000000000000020 |
            // | 0x60:0x7f | value of b | 0x<.............................................................b> |
            // | 0x80:0x9f | value of e | 0x<.............................................................e> |
            // | 0xa0:0xbf | value of m | 0x<.............................................................m> |
            mstore(ptr, 0x20)
            mstore(add(ptr, 0x20), 0x20)
            mstore(add(ptr, 0x40), 0x20)
            mstore(add(ptr, 0x60), b)
            mstore(add(ptr, 0x80), e)
            mstore(add(ptr, 0xa0), m)

            // Given the result < m, it's guaranteed to fit in 32 bytes,
            // so we can use the memory scratch space located at offset 0.
            success := staticcall(gas(), 0x05, ptr, 0xc0, 0x00, 0x20)
            result := mload(0x00)
        }
    }

    /**
     * @dev Variant of {modExp} that supports inputs of arbitrary length.
     */
    function modExp(bytes memory b, bytes memory e, bytes memory m) internal view returns (bytes memory) {
        (bool success, bytes memory result) = tryModExp(b, e, m);
        if (!success) {
            Panic.panic(Panic.DIVISION_BY_ZERO);
        }
        return result;
    }

    /**
     * @dev Variant of {tryModExp} that supports inputs of arbitrary length.
     */
    function tryModExp(
        bytes memory b,
        bytes memory e,
        bytes memory m
    ) internal view returns (bool success, bytes memory result) {
        if (_zeroBytes(m)) return (false, new bytes(0));

        uint256 mLen = m.length;

        // Encode call args in result and move the free memory pointer
        result = abi.encodePacked(b.length, e.length, mLen, b, e, m);

        assembly ("memory-safe") {
            let dataPtr := add(result, 0x20)
            // Write result on top of args to avoid allocating extra memory.
            success := staticcall(gas(), 0x05, dataPtr, mload(result), dataPtr, mLen)
            // Overwrite the length.
            // result.length > returndatasize() is guaranteed because returndatasize() == m.length
            mstore(result, mLen)
            // Set the memory pointer after the returned data.
            mstore(0x40, add(dataPtr, mLen))
        }
    }

    /**
     * @dev Returns whether the provided byte array is zero.
     */
    function _zeroBytes(bytes memory byteArray) private pure returns (bool) {
        for (uint256 i = 0; i < byteArray.length; ++i) {
            if (byteArray[i] != 0) {
                return false;
            }
        }
        return true;
    }

    /**
     * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded
     * towards zero.
     *
     * This method is based on Newton's method for computing square roots; the algorithm is restricted to only
     * using integer operations.
     */
    function sqrt(uint256 a) internal pure returns (uint256) {
        unchecked {
            // Take care of easy edge cases when a == 0 or a == 1
            if (a <= 1) {
                return a;
            }

            // In this function, we use Newton's method to get a root of `f(x) := x² - a`. It involves building a
            // sequence x_n that converges toward sqrt(a). For each iteration x_n, we also define the error between
            // the current value as `ε_n = | x_n - sqrt(a) |`.
            //
            // For our first estimation, we consider `e` the smallest power of 2 which is bigger than the square root
            // of the target. (i.e. `2**(e-1) ≤ sqrt(a) < 2**e`). We know that `e ≤ 128` because `(2¹²⁸)² = 2²⁵⁶` is
            // bigger than any uint256.
            //
            // By noticing that
            // `2**(e-1) ≤ sqrt(a) < 2**e → (2**(e-1))² ≤ a < (2**e)² → 2**(2*e-2) ≤ a < 2**(2*e)`
            // we can deduce that `e - 1` is `log2(a) / 2`. We can thus compute `x_n = 2**(e-1)` using a method similar
            // to the msb function.
            uint256 aa = a;
            uint256 xn = 1;

            if (aa >= (1 << 128)) {
                aa >>= 128;
                xn <<= 64;
            }
            if (aa >= (1 << 64)) {
                aa >>= 64;
                xn <<= 32;
            }
            if (aa >= (1 << 32)) {
                aa >>= 32;
                xn <<= 16;
            }
            if (aa >= (1 << 16)) {
                aa >>= 16;
                xn <<= 8;
            }
            if (aa >= (1 << 8)) {
                aa >>= 8;
                xn <<= 4;
            }
            if (aa >= (1 << 4)) {
                aa >>= 4;
                xn <<= 2;
            }
            if (aa >= (1 << 2)) {
                xn <<= 1;
            }

            // We now have x_n such that `x_n = 2**(e-1) ≤ sqrt(a) < 2**e = 2 * x_n`. This implies ε_n ≤ 2**(e-1).
            //
            // We can refine our estimation by noticing that the middle of that interval minimizes the error.
            // If we move x_n to equal 2**(e-1) + 2**(e-2), then we reduce the error to ε_n ≤ 2**(e-2).
            // This is going to be our x_0 (and ε_0)
            xn = (3 * xn) >> 1; // ε_0 := | x_0 - sqrt(a) | ≤ 2**(e-2)

            // From here, Newton's method give us:
            // x_{n+1} = (x_n + a / x_n) / 2
            //
            // One should note that:
            // x_{n+1}² - a = ((x_n + a / x_n) / 2)² - a
            //              = ((x_n² + a) / (2 * x_n))² - a
            //              = (x_n⁴ + 2 * a * x_n² + a²) / (4 * x_n²) - a
            //              = (x_n⁴ + 2 * a * x_n² + a² - 4 * a * x_n²) / (4 * x_n²)
            //              = (x_n⁴ - 2 * a * x_n² + a²) / (4 * x_n²)
            //              = (x_n² - a)² / (2 * x_n)²
            //              = ((x_n² - a) / (2 * x_n))²
            //              ≥ 0
            // Which proves that for all n ≥ 1, sqrt(a) ≤ x_n
            //
            // This gives us the proof of quadratic convergence of the sequence:
            // ε_{n+1} = | x_{n+1} - sqrt(a) |
            //         = | (x_n + a / x_n) / 2 - sqrt(a) |
            //         = | (x_n² + a - 2*x_n*sqrt(a)) / (2 * x_n) |
            //         = | (x_n - sqrt(a))² / (2 * x_n) |
            //         = | ε_n² / (2 * x_n) |
            //         = ε_n² / | (2 * x_n) |
            //
            // For the first iteration, we have a special case where x_0 is known:
            // ε_1 = ε_0² / | (2 * x_0) |
            //     ≤ (2**(e-2))² / (2 * (2**(e-1) + 2**(e-2)))
            //     ≤ 2**(2*e-4) / (3 * 2**(e-1))
            //     ≤ 2**(e-3) / 3
            //     ≤ 2**(e-3-log2(3))
            //     ≤ 2**(e-4.5)
            //
            // For the following iterations, we use the fact that, 2**(e-1) ≤ sqrt(a) ≤ x_n:
            // ε_{n+1} = ε_n² / | (2 * x_n) |
            //         ≤ (2**(e-k))² / (2 * 2**(e-1))
            //         ≤ 2**(2*e-2*k) / 2**e
            //         ≤ 2**(e-2*k)
            xn = (xn + a / xn) >> 1; // ε_1 := | x_1 - sqrt(a) | ≤ 2**(e-4.5)  -- special case, see above
            xn = (xn + a / xn) >> 1; // ε_2 := | x_2 - sqrt(a) | ≤ 2**(e-9)    -- general case with k = 4.5
            xn = (xn + a / xn) >> 1; // ε_3 := | x_3 - sqrt(a) | ≤ 2**(e-18)   -- general case with k = 9
            xn = (xn + a / xn) >> 1; // ε_4 := | x_4 - sqrt(a) | ≤ 2**(e-36)   -- general case with k = 18
            xn = (xn + a / xn) >> 1; // ε_5 := | x_5 - sqrt(a) | ≤ 2**(e-72)   -- general case with k = 36
            xn = (xn + a / xn) >> 1; // ε_6 := | x_6 - sqrt(a) | ≤ 2**(e-144)  -- general case with k = 72

            // Because e ≤ 128 (as discussed during the first estimation phase), we know have reached a precision
            // ε_6 ≤ 2**(e-144) < 1. Given we're operating on integers, then we can ensure that xn is now either
            // sqrt(a) or sqrt(a) + 1.
            return xn - SafeCast.toUint(xn > a / xn);
        }
    }

    /**
     * @dev Calculates sqrt(a), following the selected rounding direction.
     */
    function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = sqrt(a);
            return result + SafeCast.toUint(unsignedRoundsUp(rounding) && result * result < a);
        }
    }

    /**
     * @dev Return the log in base 2 of a positive value rounded towards zero.
     * Returns 0 if given 0.
     */
    function log2(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        uint256 exp;
        unchecked {
            exp = 128 * SafeCast.toUint(value > (1 << 128) - 1);
            value >>= exp;
            result += exp;

            exp = 64 * SafeCast.toUint(value > (1 << 64) - 1);
            value >>= exp;
            result += exp;

            exp = 32 * SafeCast.toUint(value > (1 << 32) - 1);
            value >>= exp;
            result += exp;

            exp = 16 * SafeCast.toUint(value > (1 << 16) - 1);
            value >>= exp;
            result += exp;

            exp = 8 * SafeCast.toUint(value > (1 << 8) - 1);
            value >>= exp;
            result += exp;

            exp = 4 * SafeCast.toUint(value > (1 << 4) - 1);
            value >>= exp;
            result += exp;

            exp = 2 * SafeCast.toUint(value > (1 << 2) - 1);
            value >>= exp;
            result += exp;

            result += SafeCast.toUint(value > 1);
        }
        return result;
    }

    /**
     * @dev Return the log in base 2, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log2(value);
            return result + SafeCast.toUint(unsignedRoundsUp(rounding) && 1 << result < value);
        }
    }

    /**
     * @dev Return the log in base 10 of a positive value rounded towards zero.
     * Returns 0 if given 0.
     */
    function log10(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >= 10 ** 64) {
                value /= 10 ** 64;
                result += 64;
            }
            if (value >= 10 ** 32) {
                value /= 10 ** 32;
                result += 32;
            }
            if (value >= 10 ** 16) {
                value /= 10 ** 16;
                result += 16;
            }
            if (value >= 10 ** 8) {
                value /= 10 ** 8;
                result += 8;
            }
            if (value >= 10 ** 4) {
                value /= 10 ** 4;
                result += 4;
            }
            if (value >= 10 ** 2) {
                value /= 10 ** 2;
                result += 2;
            }
            if (value >= 10 ** 1) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 10, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log10(value);
            return result + SafeCast.toUint(unsignedRoundsUp(rounding) && 10 ** result < value);
        }
    }

    /**
     * @dev Return the log in base 256 of a positive value rounded towards zero.
     * Returns 0 if given 0.
     *
     * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.
     */
    function log256(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        uint256 isGt;
        unchecked {
            isGt = SafeCast.toUint(value > (1 << 128) - 1);
            value >>= isGt * 128;
            result += isGt * 16;

            isGt = SafeCast.toUint(value > (1 << 64) - 1);
            value >>= isGt * 64;
            result += isGt * 8;

            isGt = SafeCast.toUint(value > (1 << 32) - 1);
            value >>= isGt * 32;
            result += isGt * 4;

            isGt = SafeCast.toUint(value > (1 << 16) - 1);
            value >>= isGt * 16;
            result += isGt * 2;

            result += SafeCast.toUint(value > (1 << 8) - 1);
        }
        return result;
    }

    /**
     * @dev Return the log in base 256, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log256(value);
            return result + SafeCast.toUint(unsignedRoundsUp(rounding) && 1 << (result << 3) < value);
        }
    }

    /**
     * @dev Returns whether a provided rounding mode is considered rounding up for unsigned integers.
     */
    function unsignedRoundsUp(Rounding rounding) internal pure returns (bool) {
        return uint8(rounding) % 2 == 1;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC5313.sol)

pragma solidity ^0.8.20;

/**
 * @dev Interface for the Light Contract Ownership Standard.
 *
 * A standardized minimal interface required to identify an account that controls a contract
 */
interface IERC5313 {
    /**
     * @dev Gets the address of the owner.
     */
    function owner() external view returns (address);
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;

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

interface IChainlinkOracle {
    /**
     * @notice The sentinel value returned instead of the price if the data from the oracle is too old.
     * @return sentinelValue_ The sentinel value for "price too old".
     */
    function PRICE_TOO_OLD() external pure returns (int256 sentinelValue_);

    /**
     * @notice Gets the number of decimals of the asset from Chainlink.
     * @return decimals_ The number of decimals of the asset.
     */
    function getChainlinkDecimals() external view returns (uint256 decimals_);

    /**
     * @notice Gets the Chainlink price feed aggregator contract address.
     * @return priceFeed_ The address of the Chainlink price feed contract.
     */
    function getPriceFeed() external view returns (AggregatorV3Interface priceFeed_);

    /**
     * @notice Gets the duration after which the Chainlink data is considered stale or invalid.
     * @return limit_ The price validity duration.
     */
    function getChainlinkTimeElapsedLimit() external view returns (uint256 limit_);
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;

/**
 * @title Errors For The Middleware And Oracle Related Contracts
 * @notice Defines all the custom errors thrown by the contracts related to the OracleMiddleware contract.
 */
interface IOracleMiddlewareErrors {
    /**
     * @notice The price returned by an oracle is negative.
     * @param price The price returned by the oracle.
     */
    error OracleMiddlewareWrongPrice(int256 price);

    /**
     * @notice The price returned by an oracle is too old.
     * @param timestamp The timestamp of the price given by the oracle.
     */
    error OracleMiddlewarePriceTooOld(uint256 timestamp);

    /**
     * @notice The price returned by an oracle is too recent.
     * @param timestamp The timestamp of the price given by the oracle.
     */
    error OracleMiddlewarePriceTooRecent(uint256 timestamp);

    /**
     * @notice The Pyth price reported a positive exponent (negative decimals).
     * @param expo The price exponent.
     */
    error OracleMiddlewarePythPositiveExponent(int32 expo);

    /// @notice Indicates that the confidence ratio is too high.
    error OracleMiddlewareConfRatioTooHigh();

    /// @notice Indicates that an incorrect amount of tokens was provided to cover the cost of price validation.
    error OracleMiddlewareIncorrectFee();

    /**
     * @notice The validation fee returned by the Pyth contract exceeded the safeguard value.
     * @param fee The required fee returned by Pyth.
     */
    error OracleMiddlewarePythFeeSafeguard(uint256 fee);

    /// @notice The Redstone price is to divergent from the Chainlink price.
    error OracleMiddlewareRedstoneSafeguard();

    /**
     * @notice The withdrawal of the Ether in the contract failed.
     * @param to The address of the intended recipient.
     */
    error OracleMiddlewareTransferFailed(address to);

    /// @notice The recipient of a transfer is the zero address.
    error OracleMiddlewareTransferToZeroAddress();

    /**
     * @notice The recent price delay is outside of the limits.
     * @param newDelay The delay that was provided.
     */
    error OracleMiddlewareInvalidRecentPriceDelay(uint64 newDelay);

    /// @dev The new penalty is invalid.
    error OracleMiddlewareInvalidPenaltyBps();

    /// @notice The provided Chainlink round ID is invalid.
    error OracleMiddlewareInvalidRoundId();

    /// @notice The new low latency delay is invalid.
    error OracleMiddlewareInvalidLowLatencyDelay();
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;

/**
 * @title Events For The Middleware And Oracle Related Contracts
 * @notice Defines all the custom events emitted by the contracts related to the OracleMiddleware contract.
 */
interface IOracleMiddlewareEvents {
    /**
     * @notice The time elapsed limit was updated.
     * @param newTimeElapsedLimit The new limit.
     */
    event TimeElapsedLimitUpdated(uint256 newTimeElapsedLimit);

    /**
     * @notice The validation delay was updated.
     * @param newValidationDelay The new validation delay.
     */
    event ValidationDelayUpdated(uint256 newValidationDelay);

    /**
     * @notice The recent price delay for Pyth was updated.
     * @param newDelay The new recent price delay.
     */
    event PythRecentPriceDelayUpdated(uint64 newDelay);

    /**
     * @notice The recent price delay for Redstone was updated.
     * @param newDelay The new recent price delay.
     */
    event RedstoneRecentPriceDelayUpdated(uint48 newDelay);

    /**
     * @notice The confidence ratio was updated.
     * @param newConfRatio The new confidence ratio.
     */
    event ConfRatioUpdated(uint256 newConfRatio);

    /**
     * @notice The penalty for Redstone prices was updated.
     * @param newPenaltyBps The new penalty.
     */
    event PenaltyBpsUpdated(uint16 newPenaltyBps);

    /**
     * @notice The low latency delay was updated.
     * @param newLowLatencyDelay The new low latency delay.
     */
    event LowLatencyDelayUpdated(uint16 newLowLatencyDelay);
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;

import { IPyth } from "@pythnetwork/pyth-sdk-solidity/IPyth.sol";

interface IPythOracle {
    /**
     * @notice Gets the Pyth contract address.
     * @return pyth_ The Pyth contract address.
     */
    function getPyth() external view returns (IPyth pyth_);

    /**
     * @notice Gets the ID of the price feed queried by this contract.
     * @return feedId_ The Pyth price feed ID.
     */
    function getPythFeedId() external view returns (bytes32 feedId_);

    /**
     * @notice Gets the recent price delay.
     * @return recentPriceDelay_ The maximum age of a recent price to be considered valid.
     */
    function getPythRecentPriceDelay() external view returns (uint64 recentPriceDelay_);
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;

import { IERC20Metadata } from "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol";
import { HugeUint } from "@smardex-solidity-libraries-1/HugeUint.sol";

import { IBaseLiquidationRewardsManager } from "../LiquidationRewardsManager/IBaseLiquidationRewardsManager.sol";
import { IBaseOracleMiddleware } from "../OracleMiddleware/IBaseOracleMiddleware.sol";
import { IBaseRebalancer } from "../Rebalancer/IBaseRebalancer.sol";
import { IUsdn } from "../Usdn/IUsdn.sol";
import { IUsdnProtocolTypes } from "./IUsdnProtocolTypes.sol";

/**
 * @title IUsdnProtocolFallback
 * @notice Interface for the USDN protocol fallback functions
 */
interface IUsdnProtocolFallback is IUsdnProtocolTypes {
    /**
     * @notice Retrieves the list of pending actions that must be validated by the next user action in the protocol.
     * @dev If this function returns a non-empty list of pending actions, then the next user action MUST include the
     * corresponding list of price update data and raw indices as the last parameter. The user that processes those
     * pending actions will receive the corresponding security deposit.
     * @param currentUser The address of the user that will submit the price signatures for third-party actions
     * validations. This is used to filter out their actions from the returned list.
     * @param lookAhead Additionally to pending actions which are actionable at this moment `block.timestamp`, the
     * function will also return pending actions which will be actionable `lookAhead` seconds later. It is recommended
     * to use a non-zero value in order to account for the interval where the validation transaction will be pending. A
     * value of 30 seconds should already account for most situations and avoid reverts in case an action becomes
     * actionable after a user submits their transaction.
     * @param maxIter The maximum number of iterations when looking through the queue to find actionable pending
     * actions. This value will be clamped to [MIN_ACTIONABLE_PENDING_ACTIONS_ITER,_pendingActionsQueue.length()].
     * @return actions_ The pending actions if any, otherwise an empty array.
     * @return rawIndices_ The raw indices of the actionable pending actions in the queue if any, otherwise an empty
     * array. Each entry corresponds to the action in the `actions_` array, at the same index.
     */
    function getActionablePendingActions(address currentUser, uint256 lookAhead, uint256 maxIter)
        external
        view
        returns (PendingAction[] memory actions_, uint128[] memory rawIndices_);

    /**
     * @notice Retrieves the pending action with `user` as the given validator.
     * @param user The user's address.
     * @return action_ The pending action if any, otherwise a struct with all fields set to zero and
     * `ProtocolAction.None`.
     */
    function getUserPendingAction(address user) external view returns (PendingAction memory action_);

    /**
     * @notice Computes the hash generated from the given tick number and version.
     * @param tick The tick number.
     * @param version The tick version.
     * @return hash_ The hash of the given tick number and version.
     */
    function tickHash(int24 tick, uint256 version) external pure returns (bytes32 hash_);

    /**
     * @notice Computes the liquidation price of the given tick number, taking into account the effects of funding.
     * @dev Uses the values from storage for the various variables. Note that ticks that are
     * not a multiple of the tick spacing cannot contain a long position.
     * @param tick The tick number.
     * @return price_ The liquidation price.
     */
    function getEffectivePriceForTick(int24 tick) external view returns (uint128 price_);

    /**
     * @notice Computes the liquidation price of the given tick number, taking into account the effects of funding.
     * @dev Uses the given values instead of the ones from the storage. Note that ticks that are not a multiple of the
     * tick spacing cannot contain a long position.
     * @param tick The tick number.
     * @param assetPrice The current/projected price of the asset.
     * @param longTradingExpo The trading exposure of the long side (total expo - balance long).
     * @param accumulator The liquidation multiplier accumulator.
     * @return price_ The liquidation price.
     */
    function getEffectivePriceForTick(
        int24 tick,
        uint256 assetPrice,
        uint256 longTradingExpo,
        HugeUint.Uint512 memory accumulator
    ) external view returns (uint128 price_);

    /**
     * @notice Computes an estimate of the amount of assets received when withdrawing.
     * @dev The result is a rough estimate and does not take into account rebases and liquidations.
     * @param usdnShares The amount of USDN shares to use in the withdrawal.
     * @param price The current/projected price of the asset.
     * @param timestamp The The timestamp corresponding to `price`.
     * @return assetExpected_ The expected amount of assets to be received.
     */
    function previewWithdraw(uint256 usdnShares, uint128 price, uint128 timestamp)
        external
        view
        returns (uint256 assetExpected_);

    /**
     * @notice Computes an estimate of USDN tokens to be minted and SDEX tokens to be burned when depositing.
     * @dev The result is a rough estimate and does not take into account rebases and liquidations.
     * @param amount The amount of assets to deposit.
     * @param price The current/projected price of the asset.
     * @param timestamp The timestamp corresponding to `price`.
     * @return usdnSharesExpected_ The amount of USDN shares to be minted.
     * @return sdexToBurn_ The amount of SDEX tokens to be burned.
     */
    function previewDeposit(uint256 amount, uint128 price, uint128 timestamp)
        external
        view
        returns (uint256 usdnSharesExpected_, uint256 sdexToBurn_);

    /**
     * @notice Refunds the security deposit to the given validator if it has a liquidated initiated long position.
     * @dev The security deposit is always sent to the validator even if the pending action is actionable.
     * @param validator The address of the validator (must be payable as it will receive some native currency).
     */
    function refundSecurityDeposit(address payable validator) external;

    /// @notice Sends the accumulated SDEX token fees to the dead address. This function can be called by anyone.
    function burnSdex() external;

    /* -------------------------------------------------------------------------- */
    /*                               Admin functions                              */
    /* -------------------------------------------------------------------------- */

    /**
     * @notice Removes a stuck pending action and performs the minimal amount of cleanup necessary.
     * @dev This function can only be called by the owner of the protocol, it serves as an escape hatch if a
     * pending action ever gets stuck due to something internal reverting unexpectedly.
     * It will not refund any fees or burned SDEX.
     * @param validator The address of the validator of the stuck pending action.
     * @param to Where the retrieved funds should be sent (security deposit, assets, usdn). Must be payable.
     */
    function removeBlockedPendingAction(address validator, address payable to) external;

    /**
     * @notice Removes a stuck pending action with no cleanup.
     * @dev This function can only be called by the owner of the protocol, it serves as an escape hatch if a
     * pending action ever gets stuck due to something internal reverting unexpectedly.
     * Always try to use `removeBlockedPendingAction` first, and only call this function if the other one fails.
     * It will not refund any fees or burned SDEX.
     * @param validator The address of the validator of the stuck pending action.
     * @param to Where the retrieved funds should be sent (security deposit, assets, usdn). Must be payable.
     */
    function removeBlockedPendingActionNoCleanup(address validator, address payable to) external;

    /**
     * @notice Removes a stuck pending action and performs the minimal amount of cleanup necessary.
     * @dev This function can only be called by the owner of the protocol, it serves as an escape hatch if a
     * pending action ever gets stuck due to something internal reverting unexpectedly.
     * It will not refund any fees or burned SDEX.
     * @param rawIndex The raw index of the stuck pending action.
     * @param to Where the retrieved funds should be sent (security deposit, assets, usdn). Must be payable.
     */
    function removeBlockedPendingAction(uint128 rawIndex, address payable to) external;

    /**
     * @notice Removes a stuck pending action with no cleanup.
     * @dev This function can only be called by the owner of the protocol, it serves as an escape hatch if a
     * pending action ever gets stuck due to something internal reverting unexpectedly.
     * Always try to use `removeBlockedPendingAction` first, and only call this function if the other one fails.
     * It will not refund any fees or burned SDEX.
     * @param rawIndex The raw index of the stuck pending action.
     * @param to Where the retrieved funds should be sent (security deposit, assets, usdn). Must be payable.
     */
    function removeBlockedPendingActionNoCleanup(uint128 rawIndex, address payable to) external;

    /* -------------------------------------------------------------------------- */
    /*                             Immutables getters                             */
    /* -------------------------------------------------------------------------- */

    /**
     * @notice The number of ticks between usable ticks. Only tick numbers that are a multiple of the tick spacing can
     * be used for storing long positions.
     * @dev A tick spacing of 1 is equivalent to a 0.01% increase in price between ticks. A tick spacing of 100 is.
     * equivalent to a ~1.005% increase in price between ticks.
     * @return tickSpacing_ The tick spacing.
     */
    function getTickSpacing() external view returns (int24 tickSpacing_);

    /**
     * @notice Gets the address of the protocol's underlying asset (ERC20 token).
     * @return asset_ The address of the asset token.
     */
    function getAsset() external view returns (IERC20Metadata asset_);

    /**
     * @notice Gets the address of the SDEX ERC20 token.
     * @return sdex_ The address of the SDEX token.
     */
    function getSdex() external view returns (IERC20Metadata sdex_);

    /**
     * @notice Gets the number of decimals of the asset's price feed.
     * @return decimals_ The number of decimals of the asset's price feed.
     */
    function getPriceFeedDecimals() external view returns (uint8 decimals_);

    /**
     * @notice Gets the number of decimals of the underlying asset token.
     * @return decimals_ The number of decimals of the asset token.
     */
    function getAssetDecimals() external view returns (uint8 decimals_);

    /**
     * @notice Gets the address of the USDN ERC20 token.
     * @return usdn_ The address of USDN ERC20 token.
     */
    function getUsdn() external view returns (IUsdn usdn_);

    /**
     * @notice Gets the `MIN_DIVISOR` constant of the USDN token.
     * @dev Check the USDN contract for more information.
     * @return minDivisor_ The `MIN_DIVISOR` constant of the USDN token.
     */
    function getUsdnMinDivisor() external view returns (uint256 minDivisor_);

    /* -------------------------------------------------------------------------- */
    /*                             Parameters getters                             */
    /* -------------------------------------------------------------------------- */

    /**
     * @notice Gets the oracle middleware contract.
     * @return oracleMiddleware_ The address of the oracle middleware contract.
     */
    function getOracleMiddleware() external view returns (IBaseOracleMiddleware oracleMiddleware_);

    /**
     * @notice Gets the liquidation rewards manager contract.
     * @return liquidationRewardsManager_ The address of the liquidation rewards manager contract.
     */
    function getLiquidationRewardsManager()
        external
        view
        returns (IBaseLiquidationRewardsManager liquidationRewardsManager_);

    /**
     * @notice Gets the rebalancer contract.
     * @return rebalancer_ The address of the rebalancer contract.
     */
    function getRebalancer() external view returns (IBaseRebalancer rebalancer_);

    /**
     * @notice Gets the lowest leverage that can be used to open a long position.
     * @return minLeverage_ The minimum leverage (with `LEVERAGE_DECIMALS` decimals).
     */
    function getMinLeverage() external view returns (uint256 minLeverage_);

    /**
     * @notice Gets the highest leverage that can be used to open a long position.
     * @dev A position can have a leverage a bit higher than this value under specific conditions involving
     * a change to the liquidation penalty setting.
     * @return maxLeverage_ The maximum leverage value (with `LEVERAGE_DECIMALS` decimals).
     */
    function getMaxLeverage() external view returns (uint256 maxLeverage_);

    /**
     * @notice Gets the deadline of the exclusivity period for the validator of a pending action with a low-latency
     * oracle.
     * @dev After this deadline, any user can validate the action with the low-latency oracle until the
     * OracleMiddleware's `_lowLatencyDelay`, and retrieve the security deposit for the pending action.
     * @return deadline_ The low-latency validation deadline of a validator (in seconds).
     */
    function getLowLatencyValidatorDeadline() external view returns (uint128 deadline_);

    /**
     * @notice Gets the deadline of the exclusivity period for the validator to confirm their action with the on-chain
     * oracle.
     * @dev After this deadline, any user can validate the pending action with the on-chain oracle and retrieve its
     * security deposit.
     * @return deadline_ The on-chain validation deadline of a validator (in seconds)
     */
    function getOnChainValidatorDeadline() external view returns (uint128 deadline_);

    /**
     * @notice Gets the liquidation penalty applied to the liquidation price when opening a position.
     * @return liquidationPenalty_ The liquidation penalty (in ticks).
     */
    function getLiquidationPenalty() external view returns (uint24 liquidationPenalty_);

    /**
     * @notice Gets the safety margin for the liquidation price of newly open positions.
     * @return safetyMarginBps_ The safety margin (in basis points).
     */
    function getSafetyMarginBps() external view returns (uint256 safetyMarginBps_);

    /**
     * @notice Gets the number of tick liquidations to perform when attempting to
     * liquidate positions during user actions.
     * @return iterations_ The number of iterations for liquidations during user actions.
     */
    function getLiquidationIteration() external view returns (uint16 iterations_);

    /**
     * @notice Gets the time frame for the EMA calculations.
     * @dev The EMA is set to the last funding rate when the time elapsed between 2 actions is greater than this value.
     * @return period_ The time frame of the EMA (in seconds).
     */
    function getEMAPeriod() external view returns (uint128 period_);

    /**
     * @notice Gets the scaling factor (SF) of the funding rate.
     * @return scalingFactor_ The scaling factor (with `FUNDING_SF_DECIMALS` decimals).
     */
    function getFundingSF() external view returns (uint256 scalingFactor_);

    /**
     * @notice Gets the fee taken by the protocol during the application of funding.
     * @return feeBps_ The fee applied to the funding (in basis points).
     */
    function getProtocolFeeBps() external view returns (uint16 feeBps_);

    /**
     * @notice Gets the fee applied when a long position is opened or closed.
     * @return feeBps_ The fee applied to a long position (in basis points).
     */
    function getPositionFeeBps() external view returns (uint16 feeBps_);

    /**
     * @notice Gets the fee applied during a vault deposit or withdrawal.
     * @return feeBps_ The fee applied to a vault action (in basis points).
     */
    function getVaultFeeBps() external view returns (uint16 feeBps_);

    /**
     * @notice Gets the rewards ratio given to the caller when burning SDEX tokens.
     * @return rewardsBps_ The rewards ratio (in basis points).
     */
    function getSdexRewardsRatioBps() external view returns (uint16 rewardsBps_);

    /**
     * @notice Gets the part of the remaining collateral given as a bonus to the Rebalancer upon liquidation of a tick.
     * @return bonusBps_ The fraction of the remaining collateral for the Rebalancer bonus (in basis points).
     */
    function getRebalancerBonusBps() external view returns (uint16 bonusBps_);

    /**
     * @notice Gets the ratio of SDEX tokens to burn per minted USDN.
     * @return ratio_ The ratio (to be divided by SDEX_BURN_ON_DEPOSIT_DIVISOR).
     */
    function getSdexBurnOnDepositRatio() external view returns (uint32 ratio_);

    /**
     * @notice Gets the amount of native tokens used as security deposit when opening a new position.
     * @return securityDeposit_ The amount of assets to use as a security deposit (in ether).
     */
    function getSecurityDepositValue() external view returns (uint64 securityDeposit_);

    /**
     * @notice Gets the threshold to reach to send accumulated fees to the fee collector.
     * @return threshold_ The amount of accumulated fees to reach (in `_assetDecimals`).
     */
    function getFeeThreshold() external view returns (uint256 threshold_);

    /**
     * @notice Gets the address of the fee collector.
     * @return feeCollector_ The address of the fee collector.
     */
    function getFeeCollector() external view returns (address feeCollector_);

    /**
     * @notice Returns the amount of time to wait before an action can be validated.
     * @dev This is also the amount of time to add to the initiate action timestamp to fetch the correct price data to
     * validate said action with a low-latency oracle.
     * @return delay_ The validation delay (in seconds).
     */
    function getMiddlewareValidationDelay() external view returns (uint256 delay_);

    /**
     * @notice Gets the expo imbalance limit when depositing assets (in basis points).
     * @return depositExpoImbalanceLimitBps_ The deposit expo imbalance limit.
     */
    function getDepositExpoImbalanceLimitBps() external view returns (int256 depositExpoImbalanceLimitBps_);

    /**
     * @notice Gets the expo imbalance limit when withdrawing assets (in basis points).
     * @return withdrawalExpoImbalanceLimitBps_ The withdrawal expo imbalance limit.
     */
    function getWithdrawalExpoImbalanceLimitBps() external view returns (int256 withdrawalExpoImbalanceLimitBps_);

    /**
     * @notice Gets the expo imbalance limit when opening a position (in basis points).
     * @return openExpoImbalanceLimitBps_ The open expo imbalance limit.
     */
    function getOpenExpoImbalanceLimitBps() external view returns (int256 openExpoImbalanceLimitBps_);

    /**
     * @notice Gets the expo imbalance limit when closing a position (in basis points).
     * @return closeExpoImbalanceLimitBps_ The close expo imbalance limit.
     */
    function getCloseExpoImbalanceLimitBps() external view returns (int256 closeExpoImbalanceLimitBps_);

    /**
     * @notice Returns the limit of the imbalance in bps to close the rebalancer position.
     * @return rebalancerCloseExpoImbalanceLimitBps_ The limit of the imbalance in bps to close the rebalancer position.
     */
    function getRebalancerCloseExpoImbalanceLimitBps()
        external
        view
        returns (int256 rebalancerCloseExpoImbalanceLimitBps_);

    /**
     * @notice Returns the imbalance desired on the long side after the creation of a rebalancer position.
     * @dev The creation of the rebalancer position aims for this target but does not guarantee reaching it.
     * @return targetLongImbalance_ The target long imbalance.
     */
    function getLongImbalanceTargetBps() external view returns (int256 targetLongImbalance_);

    /**
     * @notice Gets the nominal (target) price of USDN.
     * @return price_ The price of the USDN token after a rebase (in `_priceFeedDecimals`).
     */
    function getTargetUsdnPrice() external view returns (uint128 price_);

    /**
     * @notice Gets the USDN token price above which a rebase should occur.
     * @return threshold_ The rebase threshold (in `_priceFeedDecimals`).
     */
    function getUsdnRebaseThreshold() external view returns (uint128 threshold_);

    /**
     * @notice Gets the minimum collateral amount when opening a long position.
     * @return minLongPosition_ The minimum amount (with `_assetDecimals`).
     */
    function getMinLongPosition() external view returns (uint256 minLongPosition_);

    /* -------------------------------------------------------------------------- */
    /*                                State getters                               */
    /* -------------------------------------------------------------------------- */

    /**
     * @notice Gets the value of the funding rate at the last timestamp (`getLastUpdateTimestamp`).
     * @return lastFunding_ The last value of the funding rate (per day) with `FUNDING_RATE_DECIMALS` decimals.
     */
    function getLastFundingPerDay() external view returns (int256 lastFunding_);

    /**
     * @notice Gets the neutral price of the asset used during the last update of the vault and long balances.
     * @return lastPrice_ The most recent known price of the asset (in `_priceFeedDecimals`).
     */
    function getLastPrice() external view returns (uint128 lastPrice_);

    /**
     * @notice Gets the timestamp of the last time a fresh price was provided.
     * @return lastTimestamp_ The timestamp of the last update.
     */
    function getLastUpdateTimestamp() external view returns (uint128 lastTimestamp_);

    /**
     * @notice Gets the fees that were accumulated by the contract and are yet to be sent
     * to the fee collector (in `_assetDecimals`).
     * @return protocolFees_ The amount of accumulated fees still in the contract.
     */
    function getPendingProtocolFee() external view returns (uint256 protocolFees_);

    /**
     * @notice Gets the amount of assets backing the USDN token.
     * @return balanceVault_ The amount of assets on the vault side (in `_assetDecimals`).
     */
    function getBalanceVault() external view returns (uint256 balanceVault_);

    /**
     * @notice Gets the pending balance updates due to pending vault actions.
     * @return pendingBalanceVault_ The unreflected balance change due to pending vault actions (in `_assetDecimals`).
     */
    function getPendingBalanceVault() external view returns (int256 pendingBalanceVault_);

    /**
     * @notice Gets the exponential moving average of the funding rate per day.
     * @return ema_ The exponential moving average of the funding rate per day.
     */
    function getEMA() external view returns (int256 ema_);

    /**
     * @notice Gets the summed value of all the currently open long positions at `_lastUpdateTimestamp`.
     * @return balanceLong_ The balance of the long side (in `_assetDecimals`).
     */
    function getBalanceLong() external view returns (uint256 balanceLong_);

    /**
     * @notice Gets the total exposure of all currently open long positions.
     * @return totalExpo_ The total exposure of the longs (in `_assetDecimals`).
     */
    function getTotalExpo() external view returns (uint256 totalExpo_);

    /**
     * @notice Gets the accumulator used to calculate the liquidation multiplier.
     * @return accumulator_ The liquidation multiplier accumulator.
     */
    function getLiqMultiplierAccumulator() external view returns (HugeUint.Uint512 memory accumulator_);

    /**
     * @notice Gets the current version of the given tick.
     * @param tick The tick number.
     * @return tickVersion_ The version of the tick.
     */
    function getTickVersion(int24 tick) external view returns (uint256 tickVersion_);

    /**
     * @notice Gets the tick data for the current tick version.
     * @param tick The tick number.
     * @return tickData_ The tick data.
     */
    function getTickData(int24 tick) external view returns (TickData memory tickData_);

    /**
     * @notice Gets the long position at the provided tick and index.
     * @param tick The tick number.
     * @param index The position index.
     * @return position_ The long position.
     */
    function getCurrentLongPosition(int24 tick, uint256 index) external view returns (Position memory position_);

    /**
     * @notice Gets the highest tick that has an open position.
     * @return tick_ The highest populated tick.
     */
    function getHighestPopulatedTick() external view returns (int24 tick_);

    /**
     * @notice Gets the total number of long positions currently open.
     * @return totalLongPositions_ The number of long positions.
     */
    function getTotalLongPositions() external view returns (uint256 totalLongPositions_);

    /**
     * @notice Gets the address of the fallback contract.
     * @return fallback_ The address of the fallback contract.
     */
    function getFallbackAddress() external view returns (address fallback_);

    /**
     * @notice Gets the pause status of the USDN protocol.
     * @return isPaused_ True if it's paused, false otherwise.
     */
    function isPaused() external view returns (bool isPaused_);

    /**
     * @notice Gets the nonce a user can use to generate a delegation signature.
     * @dev This is to prevent replay attacks when using an eip712 delegation signature.
     * @param user The address of the user.
     * @return nonce_ The user's nonce.
     */
    function getNonce(address user) external view returns (uint256 nonce_);

    /* -------------------------------------------------------------------------- */
    /*                                   Setters                                  */
    /* -------------------------------------------------------------------------- */

    /**
     * @notice Replaces the OracleMiddleware contract with a new implementation.
     * @dev Cannot be the 0 address.
     * @param newOracleMiddleware The address of the new contract.
     */
    function setOracleMiddleware(IBaseOracleMiddleware newOracleMiddleware) external;

    /**
     * @notice Sets the fee collector address.
     * @dev  Cannot be the zero address.
     * @param newFeeCollector The address of the fee collector.
     */
    function setFeeCollector(address newFeeCollector) external;

    /**
     * @notice Replaces the LiquidationRewardsManager contract with a new implementation.
     * @dev Cannot be the 0 address.
     * @param newLiquidationRewardsManager The address of the new contract.
     */
    function setLiquidationRewardsManager(IBaseLiquidationRewardsManager newLiquidationRewardsManager) external;

    /**
     * @notice Replaces the Rebalancer contract with a new implementation.
     * @param newRebalancer The address of the new contract.
     */
    function setRebalancer(IBaseRebalancer newRebalancer) external;

    /**
     * @notice Sets the new deadlines of the exclusivity period for the validator to confirm its action and get its
     * security deposit back.
     * @param newLowLatencyValidatorDeadline The new exclusivity deadline for low-latency validation (offset from
     * initiate timestamp).
     * @param newOnChainValidatorDeadline The new exclusivity deadline for on-chain validation (offset from initiate
     * timestamp + oracle middleware's low latency delay).
     */
    function setValidatorDeadlines(uint128 newLowLatencyValidatorDeadline, uint128 newOnChainValidatorDeadline)
        external;

    /**
     * @notice Sets the minimum long position size.
     * @dev This value is used to prevent users from opening positions that are too small and not worth liquidating.
     * @param newMinLongPosition The new minimum long position size (with `_assetDecimals`).
     */
    function setMinLongPosition(uint256 newMinLongPosition) external;

    /**
     * @notice Sets the new minimum leverage for a position.
     * @param newMinLeverage The new minimum leverage.
     */
    function setMinLeverage(uint256 newMinLeverage) external;

    /**
     * @notice Sets the new maximum leverage for a position.
     * @param newMaxLeverage The new maximum leverage.
     */
    function setMaxLeverage(uint256 newMaxLeverage) external;

    /**
     * @notice Sets the new liquidation penalty (in ticks).
     * @param newLiquidationPenalty The new liquidation penalty.
     */
    function setLiquidationPenalty(uint24 newLiquidationPenalty) external;

    /**
     * @notice Sets the new exponential moving average period of the funding rate.
     * @param newEMAPeriod The new EMA period.
     */
    function setEMAPeriod(uint128 newEMAPeriod) external;

    /**
     * @notice Sets the new scaling factor (SF) of the funding rate.
     * @param newFundingSF The new scaling factor (SF) of the funding rate.
     */
    function setFundingSF(uint256 newFundingSF) external;

    /**
     * @notice Sets the protocol fee.
     * @dev Fees are charged when the funding is applied (Example: 50 bps -> 0.5%).
     * @param newFeeBps The fee to be charged (in basis points).
     */
    function setProtocolFeeBps(uint16 newFeeBps) external;

    /**
     * @notice Sets the position fee.
     * @param newPositionFee The new position fee (in basis points).
     */
    function setPositionFeeBps(uint16 newPositionFee) external;

    /**
     * @notice Sets the vault fee.
     * @param newVaultFee The new vault fee (in basis points).
     */
    function setVaultFeeBps(uint16 newVaultFee) external;

    /**
     * @notice Sets the rewards ratio given to the caller when burning SDEX tokens.
     * @param newRewardsBps The new rewards ratio (in basis points).
     */
    function setSdexRewardsRatioBps(uint16 newRewardsBps) external;

    /**
     * @notice Sets the rebalancer bonus.
     * @param newBonus The bonus (in basis points).
     */
    function setRebalancerBonusBps(uint16 newBonus) external;

    /**
     * @notice Sets the ratio of SDEX tokens to burn per minted USDN.
     * @param newRatio The new ratio.
     */
    function setSdexBurnOnDepositRatio(uint32 newRatio) external;

    /**
     * @notice Sets the security deposit value.
     * @dev The maximum value of the security deposit is 2^64 - 1 = 18446744073709551615 = 18.4 ethers.
     * @param securityDepositValue The security deposit value.
     * This value cannot be greater than MAX_SECURITY_DEPOSIT.
     */
    function setSecurityDepositValue(uint64 securityDepositValue) external;

    /**
     * @notice Sets the imbalance limits (in basis point).
     * @dev `newLongImbalanceTargetBps` needs to be lower than `newCloseLimitBps` and
     * higher than the additive inverse of `newWithdrawalLimitBps`.
     * @param newOpenLimitBps The new open limit.
     * @param newDepositLimitBps The new deposit limit.
     * @param newWithdrawalLimitBps The new withdrawal limit.
     * @param newCloseLimitBps The new close limit.
     * @param newRebalancerCloseLimitBps The new rebalancer close limit.
     * @param newLongImbalanceTargetBps The new target imbalance limit for the long side.
     * A positive value will target below equilibrium, a negative one will target above equilibrium.
     * If negative, the rebalancerCloseLimit will be useless since the minimum value is 1.
     */
    function setExpoImbalanceLimits(
        uint256 newOpenLimitBps,
        uint256 newDepositLimitBps,
        uint256 newWithdrawalLimitBps,
        uint256 newCloseLimitBps,
        uint256 newRebalancerCloseLimitBps,
        int256 newLongImbalanceTargetBps
    ) external;

    /**
     * @notice Sets the new safety margin for the liquidation price of newly open positions.
     * @param newSafetyMarginBps The new safety margin (in basis points).
     */
    function setSafetyMarginBps(uint256 newSafetyMarginBps) external;

    /**
     * @notice Sets the new number of liquidations iteration for user actions.
     * @param newLiquidationIteration The new number of liquidation iteration.
     */
    function setLiquidationIteration(uint16 newLiquidationIteration) external;

    /**
     * @notice Sets the minimum amount of fees to be collected before they can be withdrawn.
     * @param newFeeThreshold The minimum amount of fees to be collected before they can be withdrawn.
     */
    function setFeeThreshold(uint256 newFeeThreshold) external;

    /**
     * @notice Sets the target USDN price.
     * @dev When a rebase of USDN occurs, it will bring the price back down to this value.
     * @param newPrice The new target price (with `_priceFeedDecimals`).
     * This value cannot be greater than `_usdnRebaseThreshold`.
     */
    function setTargetUsdnPrice(uint128 newPrice) external;

    /**
     * @notice Sets the USDN rebase threshold.
     * @dev When the price of USDN exceeds this value, a rebase will be triggered.
     * @param newThreshold The new threshold value (with `_priceFeedDecimals`).
     * This value cannot be smaller than `_targetUsdnPrice` or greater than uint128(2 * 10 ** s._priceFeedDecimals)
     */
    function setUsdnRebaseThreshold(uint128 newThreshold) external;

    /**
     * @notice Pauses related USDN protocol functions.
     * @dev Pauses simultaneously all initiate/validate, refundSecurityDeposit and transferPositionOwnership functions.
     * Before pausing, this function will call `_applyPnlAndFunding` with `_lastPrice` and the current timestamp.
     * This is done to stop the funding rate from accumulating while the protocol is paused. Be sure to call {unpause}
     * to update `_lastUpdateTimestamp` when unpausing.
     */
    function pause() external;

    /**
     * @notice Pauses related USDN protocol functions without applying PnLs and the funding.
     * @dev Pauses simultaneously all initiate/validate, refundSecurityDeposit and transferPositionOwnership functions.
     * This safe version will not call `_applyPnlAndFunding` before pausing.
     */
    function pauseSafe() external;

    /**
     * @notice Unpauses related USDN protocol functions.
     * @dev Unpauses simultaneously all initiate/validate, refundSecurityDeposit and transferPositionOwnership
     * functions. This function will set `_lastUpdateTimestamp` to the current timestamp to prevent any funding during
     * the pause. Only meant to be called after a {pause} call.
     */
    function unpause() external;

    /**
     * @notice Unpauses related USDN protocol functions without updating `_lastUpdateTimestamp`.
     * @dev Unpauses simultaneously all initiate/validate, refundSecurityDeposit and transferPositionOwnership
     * functions. This safe version will not set `_lastUpdateTimestamp` to the current timestamp.
     */
    function unpauseSafe() external;
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;

import { IAccessControlDefaultAdminRules } from
    "@openzeppelin/contracts/access/extensions/IAccessControlDefaultAdminRules.sol";
import { IERC5267 } from "@openzeppelin/contracts/interfaces/IERC5267.sol";
import { IERC20Metadata } from "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol";

import { IBaseLiquidationRewardsManager } from "../LiquidationRewardsManager/IBaseLiquidationRewardsManager.sol";
import { IBaseOracleMiddleware } from "../OracleMiddleware/IBaseOracleMiddleware.sol";
import { IUsdn } from "../Usdn/IUsdn.sol";
import { IUsdnProtocolActions } from "./IUsdnProtocolActions.sol";
import { IUsdnProtocolCore } from "./IUsdnProtocolCore.sol";
import { IUsdnProtocolFallback } from "./IUsdnProtocolFallback.sol";
import { IUsdnProtocolLong } from "./IUsdnProtocolLong.sol";
import { IUsdnProtocolVault } from "./IUsdnProtocolVault.sol";

/**
 * @title IUsdnProtocolImpl
 * @notice Interface for the implementation of the USDN protocol (completed with {IUsdnProtocolFallback})
 */
interface IUsdnProtocolImpl is
    IUsdnProtocolActions,
    IUsdnProtocolVault,
    IUsdnProtocolLong,
    IUsdnProtocolCore,
    IAccessControlDefaultAdminRules,
    IERC5267
{
    /**
     * @notice Initializes the protocol's storage with the given values.
     * @dev This function should be called on deployment when creating the proxy.
     * It can only be called once.
     * @param usdn The USDN ERC20 contract address (must have a total supply of 0).
     * @param sdex The SDEX ERC20 contract address.
     * @param asset The ERC20 contract address of the token held in the vault.
     * @param oracleMiddleware The oracle middleware contract address.
     * @param liquidationRewardsManager The liquidation rewards manager contract address.
     * @param tickSpacing The number of ticks between usable ticks.
     * @param feeCollector The address that will receive the protocol fees.
     * @param protocolFallback The address of the contract that contains the remaining functions of the protocol.
     * Any call with a function signature not present in this contract will be delegated to the fallback contract.
     */
    function initializeStorage(
        IUsdn usdn,
        IERC20Metadata sdex,
        IERC20Metadata asset,
        IBaseOracleMiddleware oracleMiddleware,
        IBaseLiquidationRewardsManager liquidationRewardsManager,
        int24 tickSpacing,
        address feeCollector,
        IUsdnProtocolFallback protocolFallback
    ) external;
}

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

// solhint-disable-next-line interface-starts-with-i
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: Apache-2.0
pragma solidity ^0.8.0;

import "./PythStructs.sol";
import "./IPythEvents.sol";

/// @title Consume prices from the Pyth Network (https://pyth.network/).
/// @dev Please refer to the guidance at https://docs.pyth.network/documentation/pythnet-price-feeds/best-practices for how to consume prices safely.
/// @author Pyth Data Association
interface IPyth is IPythEvents {
    /// @notice Returns the period (in seconds) that a price feed is considered valid since its publish time
    function getValidTimePeriod() external view returns (uint validTimePeriod);

    /// @notice Returns the price and confidence interval.
    /// @dev Reverts if the price has not been updated within the last `getValidTimePeriod()` seconds.
    /// @param id The Pyth Price Feed ID of which to fetch the price and confidence interval.
    /// @return price - please read the documentation of PythStructs.Price to understand how to use this safely.
    function getPrice(
        bytes32 id
    ) external view returns (PythStructs.Price memory price);

    /// @notice Returns the exponentially-weighted moving average price and confidence interval.
    /// @dev Reverts if the EMA price is not available.
    /// @param id The Pyth Price Feed ID of which to fetch the EMA price and confidence interval.
    /// @return price - please read the documentation of PythStructs.Price to understand how to use this safely.
    function getEmaPrice(
        bytes32 id
    ) external view returns (PythStructs.Price memory price);

    /// @notice Returns the price of a price feed without any sanity checks.
    /// @dev This function returns the most recent price update in this contract without any recency checks.
    /// This function is unsafe as the returned price update may be arbitrarily far in the past.
    ///
    /// Users of this function should check the `publishTime` in the price to ensure that the returned price is
    /// sufficiently recent for their application. If you are considering using this function, it may be
    /// safer / easier to use either `getPrice` or `getPriceNoOlderThan`.
    /// @return price - please read the documentation of PythStructs.Price to understand how to use this safely.
    function getPriceUnsafe(
        bytes32 id
    ) external view returns (PythStructs.Price memory price);

    /// @notice Returns the price that is no older than `age` seconds of the current time.
    /// @dev This function is a sanity-checked version of `getPriceUnsafe` which is useful in
    /// applications that require a sufficiently-recent price. Reverts if the price wasn't updated sufficiently
    /// recently.
    /// @return price - please read the documentation of PythStructs.Price to understand how to use this safely.
    function getPriceNoOlderThan(
        bytes32 id,
        uint age
    ) external view returns (PythStructs.Price memory price);

    /// @notice Returns the exponentially-weighted moving average price of a price feed without any sanity checks.
    /// @dev This function returns the same price as `getEmaPrice` in the case where the price is available.
    /// However, if the price is not recent this function returns the latest available price.
    ///
    /// The returned price can be from arbitrarily far in the past; this function makes no guarantees that
    /// the returned price is recent or useful for any particular application.
    ///
    /// Users of this function should check the `publishTime` in the price to ensure that the returned price is
    /// sufficiently recent for their application. If you are considering using this function, it may be
    /// safer / easier to use either `getEmaPrice` or `getEmaPriceNoOlderThan`.
    /// @return price - please read the documentation of PythStructs.Price to understand how to use this safely.
    function getEmaPriceUnsafe(
        bytes32 id
    ) external view returns (PythStructs.Price memory price);

    /// @notice Returns the exponentially-weighted moving average price that is no older than `age` seconds
    /// of the current time.
    /// @dev This function is a sanity-checked version of `getEmaPriceUnsafe` which is useful in
    /// applications that require a sufficiently-recent price. Reverts if the price wasn't updated sufficiently
    /// recently.
    /// @return price - please read the documentation of PythStructs.Price to understand how to use this safely.
    function getEmaPriceNoOlderThan(
        bytes32 id,
        uint age
    ) external view returns (PythStructs.Price memory price);

    /// @notice Update price feeds with given update messages.
    /// This method requires the caller to pay a fee in wei; the required fee can be computed by calling
    /// `getUpdateFee` with the length of the `updateData` array.
    /// Prices will be updated if they are more recent than the current stored prices.
    /// The call will succeed even if the update is not the most recent.
    /// @dev Reverts if the transferred fee is not sufficient or the updateData is invalid.
    /// @param updateData Array of price update data.
    function updatePriceFeeds(bytes[] calldata updateData) external payable;

    /// @notice Wrapper around updatePriceFeeds that rejects fast if a price update is not necessary. A price update is
    /// necessary if the current on-chain publishTime is older than the given publishTime. It relies solely on the
    /// given `publishTimes` for the price feeds and does not read the actual price update publish time within `updateData`.
    ///
    /// This method requires the caller to pay a fee in wei; the required fee can be computed by calling
    /// `getUpdateFee` with the length of the `updateData` array.
    ///
    /// `priceIds` and `publishTimes` are two arrays with the same size that correspond to senders known publishTime
    /// of each priceId when calling this method. If all of price feeds within `priceIds` have updated and have
    /// a newer or equal publish time than the given publish time, it will reject the transaction to save gas.
    /// Otherwise, it calls updatePriceFeeds method to update the prices.
    ///
    /// @dev Reverts if update is not needed or the transferred fee is not sufficient or the updateData is invalid.
    /// @param updateData Array of price update data.
    /// @param priceIds Array of price ids.
    /// @param publishTimes Array of publishTimes. `publishTimes[i]` corresponds to known `publishTime` of `priceIds[i]`
    function updatePriceFeedsIfNecessary(
        bytes[] calldata updateData,
        bytes32[] calldata priceIds,
        uint64[] calldata publishTimes
    ) external payable;

    /// @notice Returns the required fee to update an array of price updates.
    /// @param updateData Array of price update data.
    /// @return feeAmount The required fee in Wei.
    function getUpdateFee(
        bytes[] calldata updateData
    ) external view returns (uint feeAmount);

    /// @notice Parse `updateData` and return price feeds of the given `priceIds` if they are all published
    /// within `minPublishTime` and `maxPublishTime`.
    ///
    /// You can use this method if you want to use a Pyth price at a fixed time and not the most recent price;
    /// otherwise, please consider using `updatePriceFeeds`. This method may store the price updates on-chain, if they
    /// are more recent than the current stored prices.
    ///
    /// This method requires the caller to pay a fee in wei; the required fee can be computed by calling
    /// `getUpdateFee` with the length of the `updateData` array.
    ///
    ///
    /// @dev Reverts if the transferred fee is not sufficient or the updateData is invalid or there is
    /// no update for any of the given `priceIds` within the given time range.
    /// @param updateData Array of price update data.
    /// @param priceIds Array of price ids.
    /// @param minPublishTime minimum acceptable publishTime for the given `priceIds`.
    /// @param maxPublishTime maximum acceptable publishTime for the given `priceIds`.
    /// @return priceFeeds Array of the price feeds corresponding to the given `priceIds` (with the same order).
    function parsePriceFeedUpdates(
        bytes[] calldata updateData,
        bytes32[] calldata priceIds,
        uint64 minPublishTime,
        uint64 maxPublishTime
    ) external payable returns (PythStructs.PriceFeed[] memory priceFeeds);

    /// @notice Similar to `parsePriceFeedUpdates` but ensures the updates returned are
    /// the first updates published in minPublishTime. That is, if there are multiple updates for a given timestamp,
    /// this method will return the first update. This method may store the price updates on-chain, if they
    /// are more recent than the current stored prices.
    ///
    ///
    /// @dev Reverts if the transferred fee is not sufficient or the updateData is invalid or there is
    /// no update for any of the given `priceIds` within the given time range and uniqueness condition.
    /// @param updateData Array of price update data.
    /// @param priceIds Array of price ids.
    /// @param minPublishTime minimum acceptable publishTime for the given `priceIds`.
    /// @param maxPublishTime maximum acceptable publishTime for the given `priceIds`.
    /// @return priceFeeds Array of the price feeds corresponding to the given `priceIds` (with the same order).
    function parsePriceFeedUpdatesUnique(
        bytes[] calldata updateData,
        bytes32[] calldata priceIds,
        uint64 minPublishTime,
        uint64 maxPublishTime
    ) external payable returns (PythStructs.PriceFeed[] memory priceFeeds);
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.0;

contract PythStructs {
    // A price with a degree of uncertainty, represented as a price +- a confidence interval.
    //
    // The confidence interval roughly corresponds to the standard error of a normal distribution.
    // Both the price and confidence are stored in a fixed-point numeric representation,
    // `x * (10^expo)`, where `expo` is the exponent.
    //
    // Please refer to the documentation at https://docs.pyth.network/documentation/pythnet-price-feeds/best-practices for how
    // to how this price safely.
    struct Price {
        // Price
        int64 price;
        // Confidence interval around the price
        uint64 conf;
        // Price exponent
        int32 expo;
        // Unix timestamp describing when the price was published
        uint publishTime;
    }

    // PriceFeed represents a current aggregate price from pyth publisher feeds.
    struct PriceFeed {
        // The price ID.
        bytes32 id;
        // Latest available price
        Price price;
        // Latest available exponentially-weighted moving average price
        Price emaPrice;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (access/IAccessControl.sol)

pragma solidity ^0.8.20;

/**
 * @dev External interface of AccessControl declared to support ERC-165 detection.
 */
interface IAccessControl {
    /**
     * @dev The `account` is missing a role.
     */
    error AccessControlUnauthorizedAccount(address account, bytes32 neededRole);

    /**
     * @dev The caller of a function is not the expected one.
     *
     * NOTE: Don't confuse with {AccessControlUnauthorizedAccount}.
     */
    error AccessControlBadConfirmation();

    /**
     * @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.
     */
    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. This account bears the admin role (for the granted role).
     * Expected in cases where the role was granted using the internal {AccessControl-_grantRole}.
     */
    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 `callerConfirmation`.
     */
    function renounceRole(bytes32 role, address callerConfirmation) external;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.1) (utils/Context.sol)

pragma solidity ^0.8.20;

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (utils/introspection/ERC165.sol)

pragma solidity ^0.8.20;

import {IERC165} from "./IERC165.sol";

/**
 * @dev Implementation of the {IERC165} interface.
 *
 * Contracts that want to implement ERC-165 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);
 * }
 * ```
 */
abstract contract ERC165 is IERC165 {
    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual returns (bool) {
        return interfaceId == type(IERC165).interfaceId;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (utils/Panic.sol)

pragma solidity ^0.8.20;

/**
 * @dev Helper library for emitting standardized panic codes.
 *
 * ```solidity
 * contract Example {
 *      using Panic for uint256;
 *
 *      // Use any of the declared internal constants
 *      function foo() { Panic.GENERIC.panic(); }
 *
 *      // Alternatively
 *      function foo() { Panic.panic(Panic.GENERIC); }
 * }
 * ```
 *
 * Follows the list from https://github.com/ethereum/solidity/blob/v0.8.24/libsolutil/ErrorCodes.h[libsolutil].
 *
 * _Available since v5.1._
 */
// slither-disable-next-line unused-state
library Panic {
    /// @dev generic / unspecified error
    uint256 internal constant GENERIC = 0x00;
    /// @dev used by the assert() builtin
    uint256 internal constant ASSERT = 0x01;
    /// @dev arithmetic underflow or overflow
    uint256 internal constant UNDER_OVERFLOW = 0x11;
    /// @dev division or modulo by zero
    uint256 internal constant DIVISION_BY_ZERO = 0x12;
    /// @dev enum conversion error
    uint256 internal constant ENUM_CONVERSION_ERROR = 0x21;
    /// @dev invalid encoding in storage
    uint256 internal constant STORAGE_ENCODING_ERROR = 0x22;
    /// @dev empty array pop
    uint256 internal constant EMPTY_ARRAY_POP = 0x31;
    /// @dev array out of bounds access
    uint256 internal constant ARRAY_OUT_OF_BOUNDS = 0x32;
    /// @dev resource error (too large allocation or too large array)
    uint256 internal constant RESOURCE_ERROR = 0x41;
    /// @dev calling invalid internal function
    uint256 internal constant INVALID_INTERNAL_FUNCTION = 0x51;

    /// @dev Reverts with a panic code. Recommended to use with
    /// the internal constants with predefined codes.
    function panic(uint256 code) internal pure {
        assembly ("memory-safe") {
            mstore(0x00, 0x4e487b71)
            mstore(0x20, code)
            revert(0x1c, 0x24)
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC5267.sol)

pragma solidity ^0.8.20;

interface IERC5267 {
    /**
     * @dev MAY be emitted to signal that the domain could have changed.
     */
    event EIP712DomainChanged();

    /**
     * @dev returns the fields and values that describe the domain separator used by this contract for EIP-712
     * signature.
     */
    function eip712Domain()
        external
        view
        returns (
            bytes1 fields,
            string memory name,
            string memory version,
            uint256 chainId,
            address verifyingContract,
            bytes32 salt,
            uint256[] memory extensions
        );
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;

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

/**
 * @title IUsdnProtocolActions
 * @notice Interface for the USDN Protocol Actions.
 */
interface IUsdnProtocolActions is IUsdnProtocolTypes {
    /**
     * @notice Initiates an open position action.
     * @dev Consult the current oracle middleware for price data format and possible oracle fee.
     * Requires `_securityDepositValue` to be included in the transaction value. In case of pending liquidations, this
     * function will not initiate the position (`isInitiated_` would be false).
     * The user's input for price and leverage is not guaranteed due to the price difference between the initiate and
     * validate actions.
     * @param amount The amount of assets to deposit.
     * @param desiredLiqPrice The desired liquidation price, including the penalty.
     * @param userMaxPrice The user's wanted maximum price at which the position can be opened.
     * @param userMaxLeverage The user's wanted maximum leverage for the new position.
     * @param to The address that will owns of the position.
     * @param validator The address that is supposed to validate the opening and receive the security deposit. If not
     * an EOA, it must be a contract that implements a `receive` function.
     * @param deadline The deadline for initiating the open position.
     * @param currentPriceData The price data used for temporary leverage and entry price computations.
     * @param previousActionsData The data needed to validate actionable pending actions.
     * @return isInitiated_ Whether the position was successfully initiated. If false, the security deposit was refunded
     * @return posId_ The unique position identifier. If the position was not initiated, the tick number will be
     * `NO_POSITION_TICK`.
     */
    function initiateOpenPosition(
        uint128 amount,
        uint128 desiredLiqPrice,
        uint128 userMaxPrice,
        uint256 userMaxLeverage,
        address to,
        address payable validator,
        uint256 deadline,
        bytes calldata currentPriceData,
        PreviousActionsData calldata previousActionsData
    ) external payable returns (bool isInitiated_, PositionId memory posId_);

    /**
     * @notice Validates a pending open position action.
     * @dev Consult the current oracle middleware for price data format and possible oracle fee.
     * It is possible for this operation to change the tick, tick version and index of the position, in which case we  emit
     * the `LiquidationPriceUpdated` event.
     * This function always sends the security deposit to the validator. So users wanting to earn the corresponding
     * security deposit must use `validateActionablePendingActions`.
     * In case liquidations are pending (`outcome_ == LongActionOutcome.PendingLiquidations`), the pending action will
     * not be removed from the queue, and the user will have to try again.
     * In case the position was liquidated by this call (`outcome_ == LongActionOutcome.Liquidated`), this function will
     * refund the security deposit and remove the pending action from the queue.
     * @param validator The address associated with the pending open position. If not an EOA, it must be a contract that
     * implements a `receive` function.
     * @param openPriceData The price data for the pending open position.
     * @param previousActionsData The data needed to validate actionable pending actions.
     * @return outcome_ The effect on the pending action (processed, liquidated, or pending liquidations).
     * @return posId_ The position ID after validation (or `NO_POSITION_TICK` if liquidated).
     */
    function validateOpenPosition(
        address payable validator,
        bytes calldata openPriceData,
        PreviousActionsData calldata previousActionsData
    ) external payable returns (LongActionOutcome outcome_, PositionId memory posId_);

    /**
     * @notice Initiates a close position action.
     * @dev Consult the current oracle middleware for price data format and possible oracle fee.
     * Requires `_securityDepositValue` to be included in the transaction value.
     * If the current tick version is greater than the tick version of the position (when it was opened), then the
     * position has been liquidated and the transaction will revert.
     * In case liquidations are pending (`outcome_ == LongActionOutcome.PendingLiquidations`), the pending action will
     * not be removed from the queue, and the user will have to try again.
     * In case the position was liquidated by this call (`outcome_ == LongActionOutcome.Liquidated`), this function will
     * refund the security deposit and remove the pending action from the queue.
     * The user's input for the price is not guaranteed due to the price difference between the initiate and validate
     * actions.
     * @param posId The unique identifier of the position to close.
     * @param amountToClose The amount of collateral to remove.
     * @param userMinPrice The user's wanted minimum price for closing the position.
     * @param to The address that will receive the assets.
     * @param validator The address that is supposed to validate the closing and receive the security deposit. If not an
     * EOA, it must be a contract that implements a `receive` function.
     * @param deadline The deadline for initiating the close position.
     * @param currentPriceData The price data for temporary calculations.
     * @param previousActionsData The data needed to validate actionable pending actions.
     * @param delegationSignature Optional EIP712 signature for delegated action.
     * @return outcome_ The effect on the pending action (processed, liquidated, or pending liquidations).
     */
    function initiateClosePosition(
        PositionId calldata posId,
        uint128 amountToClose,
        uint256 userMinPrice,
        address to,
        address payable validator,
        uint256 deadline,
        bytes calldata currentPriceData,
        PreviousActionsData calldata previousActionsData,
        bytes calldata delegationSignature
    ) external payable returns (LongActionOutcome outcome_);

    /**
     * @notice Validates a pending close position action.
     * @dev Consult the current oracle middleware for price data format and possible oracle fee.
     * This function calculates the final exit price, determines the profit of the long position, and performs the
     * payout.
     * This function always sends the security deposit to the validator. So users wanting to earn the corresponding
     * security deposit must use `validateActionablePendingActions`.
     * In case liquidations are pending (`outcome_ == LongActionOutcome.PendingLiquidations`),
     * the pending action will not be removed from the queue, and the user will have to try again.
     * In case the position was liquidated by this call (`outcome_ == LongActionOutcome.Liquidated`),
     * this function will refund the security deposit and remove the pending action from the queue.
     * @param validator The address associated with the pending close position. If not an EOA, it must be a contract
     * that implements a `receive` function.
     * @param closePriceData The price data for the pending close position action.
     * @param previousActionsData The data required to validate actionable pending actions.
     * @return outcome_ The outcome of the action (processed, liquidated, or pending liquidations).
     */
    function validateClosePosition(
        address payable validator,
        bytes calldata closePriceData,
        PreviousActionsData calldata previousActionsData
    ) external payable returns (LongActionOutcome outcome_);

    /**
     * @notice Initiates a deposit of assets into the vault to mint USDN.
     * @dev Consult the current oracle middleware for price data format and possible oracle fee.
     * Requires `_securityDepositValue` to be included in the transaction value.
     * In case liquidations are pending, this function might not initiate the deposit, and `success_` would be false.
     * The user's input for the shares is not guaranteed due to the price difference between the initiate and validate
     * actions.
     * @param amount The amount of assets to deposit.
     * @param sharesOutMin The minimum amount of USDN shares to receive.
     * @param to The address that will receive the USDN tokens.
     * @param validator The address that is supposed to validate the deposit and receive the security deposit. If not an
     * EOA, it must be a contract that implements a `receive` function.
     * @param deadline The deadline for initiating the deposit.
     * @param currentPriceData The current price data.
     * @param previousActionsData The data required to validate actionable pending actions.
     * @return success_ Indicates whether the deposit was successfully initiated.
     */
    function initiateDeposit(
        uint128 amount,
        uint256 sharesOutMin,
        address to,
        address payable validator,
        uint256 deadline,
        bytes calldata currentPriceData,
        PreviousActionsData calldata previousActionsData
    ) external payable returns (bool success_);

    /**
     * @notice Validates a pending deposit action.
     * @dev Consult the current oracle middleware for price data format and possible oracle fee.
     * This function always sends the security deposit to the validator. So users wanting to earn the corresponding
     * security deposit must use `validateActionablePendingActions`.
     * If liquidations are pending, the validation may fail, and `success_` would be false.
     * @param validator The address associated with the pending deposit action. If not an EOA, it must be a contract
     * that implements a `receive` function.
     * @param depositPriceData The price data for the pending deposit action.
     * @param previousActionsData The data required to validate actionable pending actions.
     * @return success_ Indicates whether the deposit was successfully validated.
     */
    function validateDeposit(
        address payable validator,
        bytes calldata depositPriceData,
        PreviousActionsData calldata previousActionsData
    ) external payable returns (bool success_);

    /**
     * @notice Initiates a withdrawal of assets from the vault using USDN tokens.
     * @dev Consult the current oracle middleware for price data format and possible oracle fee.
     * Requires `_securityDepositValue` to be included in the transaction value.
     * Note that in case liquidations are pending, this function might not initiate the withdrawal, and `success_` would
     * be false.
     * The user's input for the minimum amount is not guaranteed due to the price difference between the initiate and
     * validate actions.
     * @param usdnShares The amount of USDN shares to burn.
     * @param amountOutMin The minimum amount of assets to receive.
     * @param to The address that will receive the assets.
     * @param validator The address that is supposed to validate the withdrawal and receive the security deposit. If not
     * an EOA, it must be a contract that implements a `receive` function.
     * @param deadline The deadline for initiating the withdrawal.
     * @param currentPriceData The current price data.
     * @param previousActionsData The data required to validate actionable pending actions.
     * @return success_ Indicates whether the withdrawal was successfully initiated.
     */
    function initiateWithdrawal(
        uint152 usdnShares,
        uint256 amountOutMin,
        address to,
        address payable validator,
        uint256 deadline,
        bytes calldata currentPriceData,
        PreviousActionsData calldata previousActionsData
    ) external payable returns (bool success_);

    /**
     * @notice Validates a pending withdrawal action.
     * @dev Consult the current oracle middleware for price data format and possible oracle fee.
     * This function always sends the security deposit to the validator. So users wanting to earn the corresponding
     * security deposit must use `validateActionablePendingActions`.
     * In case liquidations are pending, this function might not validate the withdrawal, and `success_` would be false.
     * @param validator The address associated with the pending withdrawal action. If not an EOA, it must be a contract
     * that implements a `receive` function.
     * @param withdrawalPriceData The price data for the pending withdrawal action.
     * @param previousActionsData The data required to validate actionable pending actions.
     * @return success_ Indicates whether the withdrawal was successfully validated.
     */
    function validateWithdrawal(
        address payable validator,
        bytes calldata withdrawalPriceData,
        PreviousActionsData calldata previousActionsData
    ) external payable returns (bool success_);

    /**
     * @notice Liquidates positions based on the provided asset price.
     * @dev Consult the current oracle middleware for price data format and possible oracle fee.
     * Each tick is liquidated in constant time. The tick version is incremented for each liquidated tick.
     * @param currentPriceData The price data.
     * @return liquidatedTicks_ Information about the liquidated ticks.
     */
    function liquidate(bytes calldata currentPriceData)
        external
        payable
        returns (LiqTickInfo[] memory liquidatedTicks_);

    /**
     * @notice Manually validates actionable pending actions.
     * @dev Consult the current oracle middleware for price data format and possible oracle fee.
     * The timestamp for each pending action is calculated by adding the `OracleMiddleware.validationDelay` to its
     * initiation timestamp.
     * @param previousActionsData The data required to validate actionable pending actions.
     * @param maxValidations The maximum number of actionable pending actions to validate. At least one validation will
     * be performed.
     * @return validatedActions_ The number of successfully validated actions.
     */
    function validateActionablePendingActions(PreviousActionsData calldata previousActionsData, uint256 maxValidations)
        external
        payable
        returns (uint256 validatedActions_);

    /**
     * @notice Transfers the ownership of a position to another address.
     * @dev This function reverts if the caller is not the position owner, if the position does not exist, or if the new
     * owner's address is the zero address.
     * If the new owner is a contract that implements the `IOwnershipCallback` interface, its `ownershipCallback`
     * function will be invoked after the transfer.
     * @param posId The unique identifier of the position.
     * @param newOwner The address of the new position owner.
     * @param delegationSignature An optional EIP712 signature to authorize the transfer on the owner's behalf.
     */
    function transferPositionOwnership(PositionId calldata posId, address newOwner, bytes calldata delegationSignature)
        external;

    /**
     * @notice Retrieves the domain separator used in EIP-712 signatures.
     * @return domainSeparatorV4_ The domain separator compliant with EIP-712.
     */
    function domainSeparatorV4() external view returns (bytes32 domainSeparatorV4_);
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;

/**
 * @title IUsdnProtocolCore
 * @notice Interface for the core layer of the USDN protocol.
 */
interface IUsdnProtocolCore {
    /**
     * @notice Computes the predicted funding value since the last state update for the specified timestamp.
     * @dev The funding value, when multiplied by the long trading exposure, represents the asset balance to be
     * transferred to the vault side, or to the long side if the value is negative.
     * Reverts with `UsdnProtocolTimestampTooOld` if the given timestamp is older than the last state update.
     * @param timestamp The timestamp to use for the computation.
     * @return funding_ The funding magnitude (with `FUNDING_RATE_DECIMALS` decimals) since the last update timestamp.
     * @return fundingPerDay_ The funding rate per day (with `FUNDING_RATE_DECIMALS` decimals).
     * @return oldLongExpo_ The long trading exposure recorded at the last state update.
     */
    function funding(uint128 timestamp)
        external
        view
        returns (int256 funding_, int256 fundingPerDay_, int256 oldLongExpo_);

    /**
     * @notice Initializes the protocol by making an initial deposit and creating the first long position.
     * @dev This function can only be called once. No other user actions can be performed until the protocol
     * is initialized.
     * @param depositAmount The amount of assets to deposit.
     * @param longAmount The amount of assets for the long position.
     * @param desiredLiqPrice The desired liquidation price for the long position, excluding the liquidation penalty.
     * @param currentPriceData The encoded current price data.
     */
    function initialize(
        uint128 depositAmount,
        uint128 longAmount,
        uint128 desiredLiqPrice,
        bytes calldata currentPriceData
    ) external payable;
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;

import { HugeUint } from "@smardex-solidity-libraries-1/HugeUint.sol";

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

/**
 * @title IUsdnProtocolLong
 * @notice Interface for the long side layer of the USDN protocol.
 */
interface IUsdnProtocolLong is IUsdnProtocolTypes {
    /**
     * @notice Gets the value of the lowest usable tick, taking into account the tick spacing.
     * @dev Note that the effective minimum tick of a newly open long position also depends on the minimum allowed
     * leverage value and the current value of the liquidation price multiplier.
     * @return tick_ The lowest usable tick.
     */
    function minTick() external view returns (int24 tick_);

    /**
     * @notice Gets the liquidation price from a desired one by taking into account the tick rounding.
     * @param desiredLiqPriceWithoutPenalty The desired liquidation price without the penalty.
     * @param assetPrice The current price of the asset.
     * @param longTradingExpo The trading exposition of the long side.
     * @param accumulator The liquidation multiplier accumulator.
     * @param tickSpacing The tick spacing.
     * @param liquidationPenalty The liquidation penalty set on the tick.
     * @return liqPrice_ The new liquidation price without the penalty.
     */
    function getLiqPriceFromDesiredLiqPrice(
        uint128 desiredLiqPriceWithoutPenalty,
        uint256 assetPrice,
        uint256 longTradingExpo,
        HugeUint.Uint512 memory accumulator,
        int24 tickSpacing,
        uint24 liquidationPenalty
    ) external view returns (uint128 liqPrice_);

    /**
     * @notice Gets the value of a long position when the asset price is equal to the given price, at the given
     * timestamp.
     * @dev If the current price is smaller than the liquidation price of the position without the liquidation penalty,
     * then the value of the position is negative.
     * @param posId The unique position identifier.
     * @param price The asset price.
     * @param timestamp The timestamp of the price.
     * @return value_ The position value in assets.
     */
    function getPositionValue(PositionId calldata posId, uint128 price, uint128 timestamp)
        external
        view
        returns (int256 value_);

    /**
     * @notice Gets the tick number corresponding to a given price, accounting for funding effects.
     * @dev Uses the stored parameters for calculation.
     * @param price The asset price.
     * @return tick_ The tick number, a multiple of the tick spacing.
     */
    function getEffectiveTickForPrice(uint128 price) external view returns (int24 tick_);

    /**
     * @notice Gets the tick number corresponding to a given price, accounting for funding effects.
     * @param price The asset price.
     * @param assetPrice The current price of the asset.
     * @param longTradingExpo The trading exposition of the long side.
     * @param accumulator The liquidation multiplier accumulator.
     * @param tickSpacing The tick spacing.
     * @return tick_ The tick number, a multiple of the tick spacing.
     */
    function getEffectiveTickForPrice(
        uint128 price,
        uint256 assetPrice,
        uint256 longTradingExpo,
        HugeUint.Uint512 memory accumulator,
        int24 tickSpacing
    ) external view returns (int24 tick_);

    /**
     * @notice Retrieves the liquidation penalty assigned to the given tick if there are positions in it, otherwise
     * retrieve the current setting value from storage.
     * @param tick The tick number.
     * @return liquidationPenalty_ The liquidation penalty, in tick spacing units.
     */
    function getTickLiquidationPenalty(int24 tick) external view returns (uint24 liquidationPenalty_);

    /**
     * @notice Gets a long position identified by its tick, tick version and index.
     * @param posId The unique position identifier.
     * @return pos_ The position data.
     * @return liquidationPenalty_ The liquidation penalty for that position.
     */
    function getLongPosition(PositionId calldata posId)
        external
        view
        returns (Position memory pos_, uint24 liquidationPenalty_);

    /**
     * @notice Gets the predicted value of the long balance for the given asset price and timestamp.
     * @dev The effects of the funding and any PnL of the long positions since the last contract state
     * update is taken into account, as well as the fees. If the provided timestamp is older than the last state
     * update, the function reverts with `UsdnProtocolTimestampTooOld`. The value cannot be below 0.
     * @param currentPrice The given asset price.
     * @param timestamp The timestamp corresponding to the given price.
     * @return available_ The long balance value in assets.
     */
    function longAssetAvailableWithFunding(uint128 currentPrice, uint128 timestamp)
        external
        view
        returns (uint256 available_);

    /**
     * @notice Gets the predicted value of the long trading exposure for the given asset price and timestamp.
     * @dev The effects of the funding and any profit or loss of the long positions since the last contract state
     * update is taken into account. If the provided timestamp is older than the last state update, the function reverts
     * with `UsdnProtocolTimestampTooOld`. The value cannot be below 0.
     * @param currentPrice The given asset price.
     * @param timestamp The timestamp corresponding to the given price.
     * @return expo_ The long trading exposure value in assets.
     */
    function longTradingExpoWithFunding(uint128 currentPrice, uint128 timestamp)
        external
        view
        returns (uint256 expo_);
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;

/**
 * @title IUsdnProtocolVault
 * @notice Interface for the vault layer of the USDN protocol.
 */
interface IUsdnProtocolVault {
    /**
     * @notice Calculates the predicted USDN token price based on the given asset price and timestamp.
     * @dev The effects of the funding and the PnL of the long positions since the last contract state update are taken
     * into account.
     * @param currentPrice The current or predicted asset price.
     * @param timestamp The timestamp corresponding to `currentPrice`.
     * @return price_ The predicted USDN token price.
     */
    function usdnPrice(uint128 currentPrice, uint128 timestamp) external view returns (uint256 price_);

    /**
     * @notice Calculates the USDN token price based on the given asset price at the current timestamp.
     * @dev The effects of the funding and the PnL of the long positions since the last contract state update are taken
     * into account.
     * @param currentPrice The asset price at `block.timestamp`.
     * @return price_ The calculated USDN token price.
     */
    function usdnPrice(uint128 currentPrice) external view returns (uint256 price_);

    /**
     * @notice Gets the amount of assets in the vault for the given asset price and timestamp.
     * @dev The effects of the funding, the PnL of the long positions and the accumulated fees since the last contract
     * state update are taken into account, but not liquidations. If the provided timestamp is older than the last
     * state update, the function reverts with `UsdnProtocolTimestampTooOld`.
     * @param currentPrice The current or predicted asset price.
     * @param timestamp The timestamp corresponding to `currentPrice` (must not be earlier than `_lastUpdateTimestamp`).
     * @return available_ The available vault balance (cannot be less than 0).
     */
    function vaultAssetAvailableWithFunding(uint128 currentPrice, uint128 timestamp)
        external
        view
        returns (uint256 available_);
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.0;

/// @title IPythEvents contains the events that Pyth contract emits.
/// @dev This interface can be used for listening to the updates for off-chain and testing purposes.
interface IPythEvents {
    /// @dev Emitted when the price feed with `id` has received a fresh update.
    /// @param id The Pyth Price Feed ID.
    /// @param publishTime Publish time of the given price update.
    /// @param price Price of the given price update.
    /// @param conf Confidence interval of the given price update.
    event PriceFeedUpdate(
        bytes32 indexed id,
        uint64 publishTime,
        int64 price,
        uint64 conf
    );
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (utils/introspection/IERC165.sol)

pragma solidity ^0.8.20;

/**
 * @dev Interface of the ERC-165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[ERC].
 *
 * 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[ERC 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);
}

{
  "remappings": [
    "@chainlink/=dependencies/@chainlink-1.2.0/",
    "@openzeppelin/contracts-upgradeable/=dependencies/@openzeppelin-contracts-upgradeable-5.1.0/",
    "@openzeppelin/contracts/=dependencies/@openzeppelin-contracts-5.1.0/",
    "@pythnetwork/pyth-sdk-solidity/=dependencies/@pythnetwork-pyth-sdk-solidity-3.1.0/",
    "@redstone-finance/evm-connector/=dependencies/@redstone-finance-evm-connector-0.6.2/",
    "@smardex-solidity-libraries-1/=dependencies/@smardex-solidity-libraries-1.0.1/src/",
    "@uniswap/permit2/=dependencies/@uniswap-permit2-1.0.0/",
    "forge-std/=dependencies/forge-std-1.9.4/src/",
    "openzeppelin-foundry-upgrades/=dependencies/openzeppelin-foundry-upgrades-0.3.6/src/",
    "solady/src/=dependencies/solady-0.0.228/src/",
    "@chainlink-1.2.0/=dependencies/@chainlink-1.2.0/",
    "@openzeppelin-contracts-5.1.0/=dependencies/@openzeppelin-contracts-5.1.0/",
    "@openzeppelin-contracts-upgradeable-5.1.0/=dependencies/@openzeppelin-contracts-upgradeable-5.1.0/",
    "@pythnetwork-pyth-sdk-solidity-3.1.0/=dependencies/@pythnetwork-pyth-sdk-solidity-3.1.0/",
    "@redstone-finance-evm-connector-0.6.2/=dependencies/@redstone-finance-evm-connector-0.6.2/contracts/",
    "@smardex-solidity-libraries-1.0.1/=dependencies/@smardex-solidity-libraries-1.0.1/src/",
    "@uniswap-permit2-1.0.0/=dependencies/@uniswap-permit2-1.0.0/src/",
    "ds-test/=dependencies/openzeppelin-foundry-upgrades-0.3.6/lib/solidity-stringutils/lib/ds-test/src/",
    "forge-std-1.9.4/=dependencies/forge-std-1.9.4/src/",
    "forge-std-1/=dependencies/@smardex-solidity-libraries-1.0.1/dependencies/forge-std-1.9.4/src/",
    "openzeppelin-foundry-upgrades-0.3.6/=dependencies/openzeppelin-foundry-upgrades-0.3.6/src/",
    "solady-0.0.228/=dependencies/solady-0.0.228/src/",
    "solidity-stringutils/=dependencies/openzeppelin-foundry-upgrades-0.3.6/lib/solidity-stringutils/",
    "solmate/=dependencies/@uniswap-permit2-1.0.0/lib/solmate/"
  ],
  "optimizer": {
    "enabled": true,
    "runs": 20000
  },
  "metadata": {
    "useLiteralContent": false,
    "bytecodeHash": "ipfs",
    "appendCBOR": true
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "cancun",
  "viaIR": false,
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

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ternalType":"uint256","name":"newTimeElapsedLimit","type":"uint256"}],"name":"TimeElapsedLimitUpdated","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"newValidationDelay","type":"uint256"}],"name":"ValidationDelayUpdated","type":"event"},{"inputs":[],"name":"ADMIN_ROLE","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"BPS_DIVISOR","outputs":[{"internalType":"uint16","name":"","type":"uint16"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"DEFAULT_ADMIN_ROLE","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"MAX_CONF_RATIO","outputs":[{"internalType":"uint16","name":"","type":"uint16"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"PRICE_TOO_OLD","outputs":[{"internalType":"int256","name":"","type":"int256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"acceptDefaultAdminTransfer","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newAdmin","type":"address"}],"name":"beginDefaultAdminTransfer","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"cancelDefaultAdminTransfer","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint48","name":"newDelay","type":"uint48"}],"name":"changeDefaultAdminDelay","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"defaultAdmin","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"defaultAdminDelay","outputs":[{"internalType":"uint48","name":"","type":"uint48"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"defaultAdminDelayIncreaseWait","outputs":[{"internalType":"uint48","name":"","type":"uint48"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getChainlinkDecimals","outputs":[{"internalType":"uint256","name":"decimals_","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getChainlinkTimeElapsedLimit","outputs":[{"internalType":"uint256","name":"limit_","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getConfRatioBps","outputs":[{"internalType":"uint16","name":"ratio_","type":"uint16"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getDecimals","outputs":[{"internalType":"uint8","name":"decimals_","type":"uint8"}],"stateMutability":"pure","type":"function"},{"inputs":[],"name":"getLowLatencyDelay","outputs":[{"internalType":"uint16","name":"delay_","type":"uint16"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getPriceFeed","outputs":[{"internalType":"contract AggregatorV3Interface","name":"priceFeed_","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getPyth","outputs":[{"internalType":"contract IPyth","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getPythFeedId","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getPythRecentPriceDelay","outputs":[{"internalType":"uint64","name":"","type":"uint64"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"}],"name":"getRoleAdmin","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getValidationDelay","outputs":[{"internalType":"uint256","name":"delay_","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"grantRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"hasRole","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"actionId","type":"bytes32"},{"internalType":"uint128","name":"targetTimestamp","type":"uint128"},{"internalType":"enum IUsdnProtocolTypes.ProtocolAction","name":"action","type":"uint8"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"parseAndValidatePrice","outputs":[{"components":[{"internalType":"uint256","name":"price","type":"uint256"},{"internalType":"uint256","name":"neutralPrice","type":"uint256"},{"internalType":"uint256","name":"timestamp","type":"uint256"}],"internalType":"struct PriceInfo","name":"","type":"tuple"}],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"pendingDefaultAdmin","outputs":[{"internalType":"address","name":"newAdmin","type":"address"},{"internalType":"uint48","name":"schedule","type":"uint48"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pendingDefaultAdminDelay","outputs":[{"internalType":"uint48","name":"newDelay","type":"uint48"},{"internalType":"uint48","name":"schedule","type":"uint48"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"renounceRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"revokeRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"rollbackDefaultAdminDelay","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"newTimeElapsedLimit","type":"uint256"}],"name":"setChainlinkTimeElapsedLimit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint16","name":"newConfRatio","type":"uint16"}],"name":"setConfRatio","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint16","name":"newLowLatencyDelay","type":"uint16"},{"internalType":"contract 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IUsdnProtocolTypes.ProtocolAction","name":"","type":"uint8"}],"name":"validationCost","outputs":[{"internalType":"uint256","name":"result_","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"}],"name":"withdrawEther","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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0000000000000000000000004305fb66699c3b2702d4d05cf36551390a4c69c6ff61491a931112ddf1bd8147cd1b641375f79f5825126d665480874634fd0ace0000000000000000000000005f4ec3df9cbd43714fe2740f5e3616155c5b84190000000000000000000000007f39c581f595b53c5cb19bd0b3f8da6c935e2ca00000000000000000000000000000000000000000000000000000000000000e88

-----Decoded View---------------
Arg [0] : pythContract (address): 0x4305FB66699C3B2702D4d05CF36551390A4c69C6
Arg [1] : pythPriceID (bytes32): 0xff61491a931112ddf1bd8147cd1b641375f79f5825126d665480874634fd0ace
Arg [2] : chainlinkPriceFeed (address): 0x5f4eC3Df9cbd43714FE2740f5E3616155c5b8419
Arg [3] : wstETH (address): 0x7f39C581F595B53c5cb19bD0b3f8dA6c935E2Ca0
Arg [4] : chainlinkTimeElapsedLimit (uint256): 3720

-----Encoded View---------------
5 Constructor Arguments found :
Arg [0] : 0000000000000000000000004305fb66699c3b2702d4d05cf36551390a4c69c6
Arg [1] : ff61491a931112ddf1bd8147cd1b641375f79f5825126d665480874634fd0ace
Arg [2] : 0000000000000000000000005f4ec3df9cbd43714fe2740f5e3616155c5b8419
Arg [3] : 0000000000000000000000007f39c581f595b53c5cb19bd0b3f8da6c935e2ca0
Arg [4] : 0000000000000000000000000000000000000000000000000000000000000e88