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// SPDX-License-Identifier: Apache-2.0
pragma solidity 0.8.16;

import { ERC4626, SafeERC20 } from "./ERC4626.sol";
import { ERC20 } from "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import { Ownable } from "@openzeppelin/contracts/access/Ownable.sol";
import { SafeCast } from "@openzeppelin/contracts/utils/math/SafeCast.sol";
import { Registry } from "src/Registry.sol";
import { SwapRouter } from "src/modules/swap-router/SwapRouter.sol";
import { PriceRouter } from "src/modules/price-router/PriceRouter.sol";
import { IGravity } from "src/interfaces/external/IGravity.sol";
import { AddressArray } from "src/utils/AddressArray.sol";
import { Math } from "../utils/Math.sol";
// import { ReentrancyGuard } from "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import { Owned } from "@solmate/auth/Owned.sol";
import { ReentrancyGuard } from "@solmate/utils/ReentrancyGuard.sol";

/**
 * @title Sommelier Cellar
 * @notice A composable ERC4626 that can use a set of other ERC4626 or ERC20 positions to earn yield.
 * @author Brian Le
 */
contract Cellar is ERC4626, Owned, ReentrancyGuard {
    using AddressArray for address[];
    using AddressArray for ERC20[];
    using SafeERC20 for ERC20;
    using SafeCast for uint256;
    using Math for uint256;

    // ========================================= POSITIONS CONFIG =========================================

    /**
     * @notice Emitted when a position is added.
     * @param position address of position that was added
     * @param index index that position was added at
     */
    event PositionAdded(address indexed position, uint256 index);

    /**
     * @notice Emitted when a position is removed.
     * @param position address of position that was removed
     * @param index index that position was removed from
     */
    event PositionRemoved(address indexed position, uint256 index);

    /**
     * @notice Emitted when the positions at two indexes are swapped.
     * @param newPosition1 address of position (previously at index2) that replaced index1.
     * @param newPosition2 address of position (previously at index1) that replaced index2.
     * @param index1 index of first position involved in the swap
     * @param index2 index of second position involved in the swap.
     */
    event PositionSwapped(address indexed newPosition1, address indexed newPosition2, uint256 index1, uint256 index2);

    /**
     * @notice Attempted an operation on an untrusted position.
     * @param position address of the position
     */
    error Cellar__UntrustedPosition(address position);

    /**
     * @notice Attempted to add a position that is already being used.
     * @param position address of the position
     */
    error Cellar__PositionAlreadyUsed(address position);

    /**
     * @notice Attempted an action on a position that is required to be empty before the action can be performed.
     * @param position address of the non-empty position
     * @param sharesRemaining amount of shares remaining in the position
     */
    error Cellar__PositionNotEmpty(address position, uint256 sharesRemaining);

    /**
     * @notice Attempted an operation with an asset that was different then the one expected.
     * @param asset address of the asset
     * @param expectedAsset address of the expected asset
     */
    error Cellar__AssetMismatch(address asset, address expectedAsset);

    /**
     * @notice Attempted an action on a position that is not being used by the cellar but must be for
     *         the operation to succeed.
     * @param position address of the invalid position
     */
    error Cellar__InvalidPosition(address position);

    /**
     * @notice Attempted to remove holding position.
     */
    error Cellar__RemoveHoldingPosition();

    /**
     * @notice Attempted to add a position when the position array is full.
     * @param maxPositions maximum number of positions that can be used
     */
    error Cellar__PositionArrayFull(uint256 maxPositions);

    /**
     * @notice Value specifying the interface a position uses.
     * @param ERC20 an ERC20 token
     * @param ERC4626 an ERC4626 vault
     * @param Cellar a cellar
     */
    enum PositionType {
        ERC20,
        ERC4626,
        Cellar
    }

    /**
     * @notice Addresses of the positions currently used by the cellar.
     */
    address[] public positions;

    /**
     * @notice Tell whether a position is currently used.
     */
    mapping(address => bool) public isPositionUsed;

    /**
     * @notice Get the type related to a position.
     */
    mapping(address => PositionType) public getPositionType;

    /**
     * @notice Get the addresses of the positions current used by the cellar.
     */
    function getPositions() external view returns (address[] memory) {
        return positions;
    }

    /**
     * @notice Maximum amount of positions a cellar can use at once.
     */
    uint8 public constant MAX_POSITIONS = 32;

    /**
     * @notice Insert a trusted position to the list of positions used by the cellar at a given index.
     * @param index index at which to insert the position
     * @param position address of position to add
     */
    function addPosition(uint256 index, address position) external onlyOwner whenNotShutdown {
        if (positions.length >= MAX_POSITIONS) revert Cellar__PositionArrayFull(MAX_POSITIONS);
        if (!isTrusted[position]) revert Cellar__UntrustedPosition(position);

        // Check if position is already being used.
        if (isPositionUsed[position]) revert Cellar__PositionAlreadyUsed(position);

        // Add new position at a specified index.
        positions.add(index, position);
        isPositionUsed[position] = true;

        emit PositionAdded(position, index);
    }

    /**
     * @notice Push a trusted position to the end of the list of positions used by the cellar.
     * @dev If you know you are going to add a position to the end of the array, this is more
     *      efficient then `addPosition`.
     * @param position address of position to add
     */
    function pushPosition(address position) external onlyOwner whenNotShutdown {
        if (positions.length >= MAX_POSITIONS) revert Cellar__PositionArrayFull(MAX_POSITIONS);
        if (!isTrusted[position]) revert Cellar__UntrustedPosition(position);

        // Check if position is already being used.
        if (isPositionUsed[position]) revert Cellar__PositionAlreadyUsed(position);

        // Add new position to the end of the positions.
        positions.push(position);
        isPositionUsed[position] = true;

        emit PositionAdded(position, positions.length - 1);
    }

    /**
     * @notice Remove the position at a given index from the list of positions used by the cellar.
     * @param index index at which to remove the position
     */
    function removePosition(uint256 index) external onlyOwner {
        // Get position being removed.
        address position = positions[index];

        // Only remove position if it is empty, and if it is not the holding position.
        uint256 positionBalance = _balanceOf(position);
        if (positionBalance > 0) revert Cellar__PositionNotEmpty(position, positionBalance);
        if (position == holdingPosition) revert Cellar__RemoveHoldingPosition();

        // Remove position at the given index.
        positions.remove(index);
        isPositionUsed[position] = false;

        emit PositionRemoved(position, index);
    }

    /**
     * @notice Swap the positions at two given indexes.
     * @param index1 index of first position to swap
     * @param index2 index of second position to swap
     */
    function swapPositions(uint256 index1, uint256 index2) external onlyOwner {
        // Get the new positions that will be at each index.
        address newPosition1 = positions[index2];
        address newPosition2 = positions[index1];

        // Swap positions.
        (positions[index1], positions[index2]) = (newPosition1, newPosition2);

        emit PositionSwapped(newPosition1, newPosition2, index1, index2);
    }

    // ============================================ TRUST CONFIG ============================================

    /**
     * @notice Emitted when trust for a position is changed.
     * @param position address of position that trust was changed for
     * @param isTrusted whether the position is trusted
     */
    event TrustChanged(address indexed position, bool isTrusted);

    /**
     * @notice Attempted to trust a position not being used.
     * @param position address of the invalid position
     */
    error Cellar__PositionPricingNotSetUp(address position);

    /**
     * @notice Addresses of the positions currently used by the cellar.
     */
    uint256 public constant PRICE_ROUTER_REGISTRY_SLOT = 2;

    /**
     * @notice Tell whether a position is trusted.
     */
    mapping(address => bool) public isTrusted;

    /**
     * @notice Trust a position to be used by the cellar.
     * @param position address of position to trust
     * @param positionType value specifying the interface the position uses
     */
    function trustPosition(address position, PositionType positionType) external onlyOwner {
        // Trust position.
        isTrusted[position] = true;

        // Set position type.
        getPositionType[position] = positionType;

        // Now that position type is set up, check that asset of position is supported for pricing operations.
        ERC20 positionAsset = _assetOf(position);
        if (!PriceRouter(registry.getAddress(PRICE_ROUTER_REGISTRY_SLOT)).isSupported(positionAsset))
            revert Cellar__PositionPricingNotSetUp(address(positionAsset));

        emit TrustChanged(position, true);
    }

    // ============================================ WITHDRAW CONFIG ============================================

    /**
     * @notice Emitted when withdraw type configuration is changed.
     * @param oldType previous withdraw type
     * @param newType new withdraw type
     */
    event WithdrawTypeChanged(WithdrawType oldType, WithdrawType newType);

    /**
     * @notice The withdraw type to use for the cellar.
     * @param ORDERLY use `positions` in specify the order in which assets are withdrawn (eg.
     *                `positions[0]` is withdrawn from first); least impactful positions (position
     *                that will have its core positions impacted the least by having funds removed)
     *                should be withdrawn from first and most impactful position should be last
     * @param PROPORTIONAL pull assets from each position proportionally when withdrawing, used if
     *                     trying to maintain a specific ratio
     */
    enum WithdrawType {
        ORDERLY,
        PROPORTIONAL
    }

    /**
     * @notice The withdraw type to used by the cellar.
     */
    WithdrawType public withdrawType;

    /**
     * @notice Set the withdraw type used by the cellar.
     * @param newWithdrawType value of the new withdraw type to use
     */
    function setWithdrawType(WithdrawType newWithdrawType) external onlyOwner {
        emit WithdrawTypeChanged(withdrawType, newWithdrawType);

        withdrawType = newWithdrawType;
    }

    // ============================================ HOLDINGS CONFIG ============================================

    /**
     * @notice Emitted when the holdings position is changed.
     * @param oldPosition address of the old holdings position
     * @param newPosition address of the new holdings position
     */
    event HoldingPositionChanged(address indexed oldPosition, address indexed newPosition);

    /**
     * @notice The "default" position which uses the same asset as the cellar. It is the position
     *         deposited assets will automatically go into (perhaps while waiting to be rebalanced
     *         to other positions) and commonly the first position withdrawn assets will be pulled
     *         from if using orderly withdraws.
     * @dev MUST accept the same asset as the cellar's `asset`. MUST be a position present in
     *      `positions`. Should be a static (eg. just holding) or lossless (eg. lending on Aave)
     *      position. Should not be expensive to move assets in or out of as this will occur
     *      frequently. It is highly recommended to choose a "simple" holding position.
     */
    address public holdingPosition;

    /**
     * @notice Set the holding position used by the cellar.
     * @param newHoldingPosition address of the new holding position to use
     */
    function setHoldingPosition(address newHoldingPosition) external onlyOwner {
        if (!isPositionUsed[newHoldingPosition]) revert Cellar__InvalidPosition(newHoldingPosition);

        ERC20 holdingPositionAsset = _assetOf(newHoldingPosition);
        if (holdingPositionAsset != asset) revert Cellar__AssetMismatch(address(holdingPositionAsset), address(asset));

        emit HoldingPositionChanged(holdingPosition, newHoldingPosition);

        holdingPosition = newHoldingPosition;
    }

    // ============================================ ACCRUAL STORAGE ============================================

    /**
     * @notice Timestamp of when the last accrual occurred.
     * @dev Used for determining the amount of platform fees that can be taken during an accrual period.
     */
    uint64 public lastAccrual;

    // =============================================== FEES CONFIG ===============================================

    /**
     * @notice Emitted when platform fees is changed.
     * @param oldPlatformFee value platform fee was changed from
     * @param newPlatformFee value platform fee was changed to
     */
    event PlatformFeeChanged(uint64 oldPlatformFee, uint64 newPlatformFee);

    /**
     * @notice Emitted when performance fees is changed.
     * @param oldPerformanceFee value performance fee was changed from
     * @param newPerformanceFee value performance fee was changed to
     */
    event PerformanceFeeChanged(uint64 oldPerformanceFee, uint64 newPerformanceFee);

    /**
     * @notice Emitted when fees distributor is changed.
     * @param oldFeesDistributor address of fee distributor was changed from
     * @param newFeesDistributor address of fee distributor was changed to
     */
    event FeesDistributorChanged(bytes32 oldFeesDistributor, bytes32 newFeesDistributor);

    /**
     * @notice Emitted when strategist performance fee cut is changed.
     * @param oldPerformanceCut value strategist performance fee cut was changed from
     * @param newPerformanceCut value strategist performance fee cut was changed to
     */
    event StrategistPerformanceCutChanged(uint64 oldPerformanceCut, uint64 newPerformanceCut);

    /**
     * @notice Emitted when strategist platform fee cut is changed.
     * @param oldPlatformCut value strategist platform fee cut was changed from
     * @param newPlatformCut value strategist platform fee cut was changed to
     */
    event StrategistPlatformCutChanged(uint64 oldPlatformCut, uint64 newPlatformCut);

    /**
     * @notice Emitted when strategists payout address is changed.
     * @param oldPayoutAddress value strategists payout address was changed from
     * @param newPayoutAddress value strategists payout address was changed to
     */
    event StrategistPayoutAddressChanged(address oldPayoutAddress, address newPayoutAddress);

    /**
     * @notice Attempted to use an invalid cosmos address.
     */
    error Cellar__InvalidCosmosAddress();

    /**
     * @notice Attempted to change strategist fee cut with invalid value.
     */
    error Cellar__InvalidFeeCut();

    /**
     * @notice Attempted to change performance/platform fee with invalid value.
     */
    error Cellar__InvalidFee();

    /**
     * @notice Data related to fees.
     * @param highWatermark Stores the share price to be used as a High Watermark to calculate performance fees.
     * @param strategistPerformanceCut Determines how much performance fees go to strategist.
     *                                 This should be a value out of 1e18 (ie. 1e18 represents 100%, 0 represents 0%).
     * @param strategistPlatformCut Determines how much platform fees go to strategist.
     *                              This should be a value out of 1e18 (ie. 1e18 represents 100%, 0 represents 0%).
     * @param platformFee The percentage of total assets accrued as platform fees over a year.
                          This should be a value out of 1e18 (ie. 1e18 represents 100%, 0 represents 0%).
     * @param performanceFee The percentage of total assets accrued as platform fees over a year.
     *                       This should be a value out of 1e18 (ie. 1e18 represents 100%, 0 represents 0%).
     * @param feesDistributor Cosmos address of module that distributes fees, specified as a hex value.
     *                        The Gravity contract expects a 32-byte value formatted in a specific way.
     * @param strategistPayoutAddress Address to send the strategists fee shares.
     */
    struct FeeData {
        uint256 highWatermark;
        uint64 strategistPerformanceCut;
        uint64 strategistPlatformCut;
        uint64 platformFee;
        uint64 performanceFee;
        bytes32 feesDistributor;
        address strategistPayoutAddress;
    }

    /**
     * @notice Stores all fee data for cellar.
     */
    FeeData public feeData =
        FeeData({
            highWatermark: 0,
            strategistPerformanceCut: 0.75e18,
            strategistPlatformCut: 0.75e18,
            platformFee: 0.02e18,
            performanceFee: 0.1e18,
            feesDistributor: hex"000000000000000000000000b813554b423266bbd4c16c32fa383394868c1f55", // 20 bytes, so need 12 bytes of zero
            strategistPayoutAddress: address(0)
        });

    uint64 public constant MAX_PERFORMANCE_FEE = 0.5e18;
    uint64 public constant MAX_PLATFORM_FEE = 0.2e18;
    uint64 public constant MAX_FEE_CUT = 1e18;

    /**
     * @notice Set the percentage of platform fees accrued over a year.
     * @param newPlatformFee value out of 1e18 that represents new platform fee percentage
     */
    function setPlatformFee(uint64 newPlatformFee) external onlyOwner {
        if (newPlatformFee > MAX_PLATFORM_FEE) revert Cellar__InvalidFee();
        emit PlatformFeeChanged(feeData.platformFee, newPlatformFee);

        feeData.platformFee = newPlatformFee;
    }

    /**
     * @notice Set the percentage of performance fees accrued from yield.
     * @param newPerformanceFee value out of 1e18 that represents new performance fee percentage
     */
    function setPerformanceFee(uint64 newPerformanceFee) external onlyOwner {
        if (newPerformanceFee > MAX_PERFORMANCE_FEE) revert Cellar__InvalidFee();
        emit PerformanceFeeChanged(feeData.performanceFee, newPerformanceFee);

        feeData.performanceFee = newPerformanceFee;
    }

    /**
     * @notice Set the address of the fee distributor on the Sommelier chain.
     * @dev IMPORTANT: Ensure that the address is formatted in the specific way that the Gravity contract
     *      expects it to be.
     * @param newFeesDistributor formatted address of the new fee distributor module
     */
    function setFeesDistributor(bytes32 newFeesDistributor) external onlyOwner {
        if (uint256(newFeesDistributor) > type(uint160).max) revert Cellar__InvalidCosmosAddress();
        emit FeesDistributorChanged(feeData.feesDistributor, newFeesDistributor);

        feeData.feesDistributor = newFeesDistributor;
    }

    /**
     * @notice Sets the Strategists cut of performance fees
     * @param cut the performance cut for the strategist
     */
    function setStrategistPerformanceCut(uint64 cut) external onlyOwner {
        if (cut > MAX_FEE_CUT) revert Cellar__InvalidFeeCut();
        emit StrategistPerformanceCutChanged(feeData.strategistPerformanceCut, cut);

        feeData.strategistPerformanceCut = cut;
    }

    /**
     * @notice Sets the Strategists cut of platform fees
     * @param cut the platform cut for the strategist
     */
    function setStrategistPlatformCut(uint64 cut) external onlyOwner {
        if (cut > MAX_FEE_CUT) revert Cellar__InvalidFeeCut();
        emit StrategistPlatformCutChanged(feeData.strategistPlatformCut, cut);

        feeData.strategistPlatformCut = cut;
    }

    /**
     * @notice Sets the Strategists payout address
     * @param payout the new strategist payout address
     */
    function setStrategistPayoutAddress(address payout) external onlyOwner {
        emit StrategistPayoutAddressChanged(feeData.strategistPayoutAddress, payout);

        feeData.strategistPayoutAddress = payout;
    }

    // ============================================= LIMITS CONFIG =============================================

    /**
     * @notice Emitted when the liquidity limit is changed.
     * @param oldLimit amount the limit was changed from
     * @param newLimit amount the limit was changed to
     */
    event LiquidityLimitChanged(uint256 oldLimit, uint256 newLimit);

    /**
     * @notice Emitted when the deposit limit is changed.
     * @param oldLimit amount the limit was changed from
     * @param newLimit amount the limit was changed to
     */
    event DepositLimitChanged(uint256 oldLimit, uint256 newLimit);

    /**
     * @notice Attempted deposit more than the max deposit.
     * @param assets the assets user attempted to deposit
     * @param maxDeposit the max assets that can be deposited
     */
    error Cellar__DepositRestricted(uint256 assets, uint256 maxDeposit);

    /**
     * @notice Maximum amount of assets that can be managed by the cellar. Denominated in the same decimals
     *         as the current asset.
     * @dev Set to `type(uint256).max` to have no limit.
     */
    uint256 public liquidityLimit = type(uint256).max;

    /**
     * @notice Maximum amount of assets per wallet. Denominated in the same decimals as the current asset.
     * @dev Set to `type(uint256).max` to have no limit.
     */
    uint256 public depositLimit = type(uint256).max;

    /**
     * @notice Set the maximum liquidity that cellar can manage. Uses the same decimals as the current asset.
     * @param newLimit amount of assets to set as the new limit
     */
    function setLiquidityLimit(uint256 newLimit) external onlyOwner {
        emit LiquidityLimitChanged(liquidityLimit, newLimit);

        liquidityLimit = newLimit;
    }

    /**
     * @notice Set the per-wallet deposit limit. Uses the same decimals as the current asset.
     * @param newLimit amount of assets to set as the new limit
     */
    function setDepositLimit(uint256 newLimit) external onlyOwner {
        emit DepositLimitChanged(depositLimit, newLimit);

        depositLimit = newLimit;
    }

    // =========================================== EMERGENCY LOGIC ===========================================

    /**
     * @notice Emitted when cellar emergency state is changed.
     * @param isShutdown whether the cellar is shutdown
     */
    event ShutdownChanged(bool isShutdown);

    /**
     * @notice Attempted action was prevented due to contract being shutdown.
     */
    error Cellar__ContractShutdown();

    /**
     * @notice Attempted action was prevented due to contract not being shutdown.
     */
    error Cellar__ContractNotShutdown();

    /**
     * @notice Whether or not the contract is shutdown in case of an emergency.
     */
    bool public isShutdown;

    /**
     * @notice Prevent a function from being called during a shutdown.
     */
    modifier whenNotShutdown() {
        if (isShutdown) revert Cellar__ContractShutdown();

        _;
    }

    /**
     * @notice Shutdown the cellar. Used in an emergency or if the cellar has been deprecated.
     * @dev In the case where
     */
    function initiateShutdown() external whenNotShutdown onlyOwner {
        isShutdown = true;

        emit ShutdownChanged(true);
    }

    /**
     * @notice Restart the cellar.
     */
    function liftShutdown() external onlyOwner {
        if (!isShutdown) revert Cellar__ContractNotShutdown();
        isShutdown = false;

        emit ShutdownChanged(false);
    }

    // =========================================== CONSTRUCTOR ===========================================

    /**
     * @notice Address of the platform's registry contract. Used to get the latest address of modules.
     */
    Registry public immutable registry;

    /**
     * @dev Owner should be set to the Gravity Bridge, which relays instructions from the Steward
     *      module to the cellars.
     *      https://github.com/PeggyJV/steward
     *      https://github.com/cosmos/gravity-bridge/blob/main/solidity/contracts/Gravity.sol
     * @param _registry address of the platform's registry contract
     * @param _asset address of underlying token used for the for accounting, depositing, and withdrawing
     * @param _positions addresses of the positions to initialize the cellar with
     * @param _positionTypes types of each positions used
     * @param _holdingPosition address of the position to use as the holding position
     * @param _withdrawType withdraw type to use for the cellar
     * @param _name name of this cellar's share token
     * @param _name symbol of this cellar's share token
     * @param _strategistPayout The address to send the strategists fee shares.
     */
    constructor(
        Registry _registry,
        ERC20 _asset,
        address[] memory _positions,
        PositionType[] memory _positionTypes,
        address _holdingPosition,
        WithdrawType _withdrawType,
        string memory _name,
        string memory _symbol,
        address _strategistPayout
    ) ERC4626(_asset, _name, _symbol) Owned(_registry.getAddress(0)) {
        registry = _registry;

        // Initialize positions.
        positions = _positions;
        ERC20 positionAsset;
        for (uint256 i; i < _positions.length; i++) {
            address position = _positions[i];

            if (isPositionUsed[position]) revert Cellar__PositionAlreadyUsed(position);

            isTrusted[position] = true;
            isPositionUsed[position] = true;
            getPositionType[position] = _positionTypes[i];

            positionAsset = _assetOf(position);
            if (!PriceRouter(registry.getAddress(PRICE_ROUTER_REGISTRY_SLOT)).isSupported(positionAsset))
                revert Cellar__PositionPricingNotSetUp(address(positionAsset));
        }

        // Initialize holding position.
        if (!isPositionUsed[_holdingPosition]) revert Cellar__InvalidPosition(_holdingPosition);

        ERC20 holdingPositionAsset = _assetOf(_holdingPosition);
        if (holdingPositionAsset != _asset)
            revert Cellar__AssetMismatch(address(holdingPositionAsset), address(_asset));

        holdingPosition = _holdingPosition;

        // Initialize withdraw type.
        withdrawType = _withdrawType;

        // Initialize last accrual timestamp to time that cellar was created, otherwise the first
        // `accrue` will take platform fees from 1970 to the time it is called.
        lastAccrual = uint64(block.timestamp);

        feeData.strategistPayoutAddress = _strategistPayout;
    }

    // =========================================== CORE LOGIC ===========================================

    /**
     * @notice Emitted when withdraws are made from a position.
     * @param position the position assets were withdrawn from
     * @param amount the amount of assets withdrawn
     */
    event PulledFromPosition(address indexed position, uint256 amount);

    /**
     * @notice Emitted when share locking period is changed.
     * @param oldPeriod the old locking period
     * @param newPeriod the new locking period
     */
    event ShareLockingPeriodChanged(uint256 oldPeriod, uint256 newPeriod);

    /**
     * @notice Attempted an action with zero shares.
     */
    error Cellar__ZeroShares();

    /**
     * @notice Attempted an action with zero assets.
     */
    error Cellar__ZeroAssets();

    /**
     * @notice Withdraw did not withdraw all assets.
     * @param assetsOwed the remaining assets owed that were not withdrawn.
     */
    error Cellar__IncompleteWithdraw(uint256 assetsOwed);

    /**
     * @notice Attempted to withdraw an illiquid position.
     * @param illiquidPosition the illiquid position.
     */
    error Cellar__IlliquidWithdraw(address illiquidPosition);

    /**
     * @notice Attempted to set `shareLockPeriod` to an invalid number.
     */
    error Cellar__InvalidShareLockPeriod();

    /**
     * @notice Attempted to burn shares when they are locked.
     * @param blockSharesAreUnlocked the block number when caller can transfer/redeem shares
     * @param currentBlock the current block number.
     */
    error Cellar__SharesAreLocked(uint256 blockSharesAreUnlocked, uint256 currentBlock);

    /**
     * @notice Attempted deposit on behalf of a user without being approved.
     */
    error Cellar__NotApprovedToDepositOnBehalf(address depositor);

    /**
     * @notice Shares must be locked for atleaset 8 blocks after minting.
     */
    uint256 public constant MINIMUM_SHARE_LOCK_PERIOD = 8;

    /**
     * @notice Shares can be locked for at most 7200 blocks after minting.
     */
    uint256 public constant MAXIMUM_SHARE_LOCK_PERIOD = 7200;

    /**
     * @notice After deposits users must wait `shareLockPeriod` blocks before being able to transfer or withdraw their shares.
     */
    uint256 public shareLockPeriod = MAXIMUM_SHARE_LOCK_PERIOD;

    /**
     * @notice mapping that stores every users last block they minted shares.
     */
    mapping(address => uint256) public userShareLockStartBlock;

    /**
     * @notice Allows share lock period to be updated.
     * @param newLock the new lock period
     */
    function setShareLockPeriod(uint256 newLock) external onlyOwner {
        if (newLock < MINIMUM_SHARE_LOCK_PERIOD || newLock > MAXIMUM_SHARE_LOCK_PERIOD)
            revert Cellar__InvalidShareLockPeriod();
        uint256 oldLockingPeriod = shareLockPeriod;
        shareLockPeriod = newLock;
        emit ShareLockingPeriodChanged(oldLockingPeriod, newLock);
    }

    /**
     * @notice helper function that checks enough blocks have passed to unlock shares.
     * @param owner the address of the user to check
     */
    function _checkIfSharesLocked(address owner) internal view {
        uint256 lockBlock = userShareLockStartBlock[owner];
        if (lockBlock != 0) {
            uint256 blockSharesAreUnlocked = lockBlock + shareLockPeriod;
            if (blockSharesAreUnlocked > block.number)
                revert Cellar__SharesAreLocked(blockSharesAreUnlocked, block.number);
        }
    }

    /**
     * @notice modifies before transfer hook to check that shares are not locked
     * @param from the address transferring shares
     */
    function _beforeTokenTransfer(
        address from,
        address,
        uint256
    ) internal view override {
        _checkIfSharesLocked(from);
    }

    /**
     * @notice called at the beginning of deposit.
     * @param assets amount of assets deposited by user.
     * @param receiver address receiving the shares.
     */
    function beforeDeposit(
        uint256 assets,
        uint256,
        address receiver
    ) internal override whenNotShutdown {
        if (msg.sender != receiver) {
            if (!registry.approvedForDepositOnBehalf(msg.sender))
                revert Cellar__NotApprovedToDepositOnBehalf(msg.sender);
        }
        uint256 maxAssets = maxDeposit(receiver);
        if (assets > maxAssets) revert Cellar__DepositRestricted(assets, maxAssets);
        feeData.highWatermark += assets;
    }

    /**
     * @notice called at the end of deposit.
     * @param assets amount of assets deposited by user.
     */
    function afterDeposit(
        uint256 assets,
        uint256,
        address receiver
    ) internal override {
        _depositTo(holdingPosition, assets);
        userShareLockStartBlock[receiver] = block.number;
    }

    /**
     * @notice called at the beginning of withdraw.
     * @param assets amount of assets withdrawn by user.
     */
    function beforeWithdraw(
        uint256 assets,
        uint256,
        address,
        address owner
    ) internal override {
        // Make sure users shares are not locked.
        _checkIfSharesLocked(owner);

        // Need to check if assets is greater than the high watermark
        // because if the performanceFee is set to zero, and all cellar shares are redeemed,
        // if the cellar has earned any yield, assets will be greater than the high watermark.
        // Becuase the high watermark is only updated when performance fees are minted.
        uint256 highWatermark = feeData.highWatermark;
        feeData.highWatermark = assets > highWatermark ? 0 : highWatermark - assets;
    }

    /**
     * @notice Deposits assets into the cellar, and returns shares to receiver.
     * @param assets amount of assets deposited by user.
     * @param receiver address to receive the shares.
     * @return shares amount of shares given for deposit.
     */
    function deposit(uint256 assets, address receiver) public override nonReentrant returns (uint256 shares) {
        uint256 _totalAssets = totalAssets();

        _takePerformanceFees(_totalAssets);

        // Check for rounding error since we round down in previewDeposit.
        if ((shares = _convertToShares(assets, _totalAssets)) == 0) revert Cellar__ZeroShares();

        beforeDeposit(assets, shares, receiver);

        // Need to transfer before minting or ERC777s could reenter.
        asset.safeTransferFrom(msg.sender, address(this), assets);

        _mint(receiver, shares);

        emit Deposit(msg.sender, receiver, assets, shares);

        afterDeposit(assets, shares, receiver);
    }

    /**
     * @notice Mints shares from the cellar, and returns shares to receiver.
     * @param shares amount of shares requested by user.
     * @param receiver address to receive the shares.
     * @return assets amount of assets deposited into the cellar.
     */
    function mint(uint256 shares, address receiver) public override nonReentrant returns (uint256 assets) {
        uint256 _totalAssets = totalAssets();

        _takePerformanceFees(_totalAssets);

        // previewMintRoundsUp, but iniital mint could return zero assets, so check for rounding error.
        if ((assets = _previewMint(shares, _totalAssets)) == 0) revert Cellar__ZeroAssets(); // No need to check for rounding error, previewMint rounds up.

        beforeDeposit(assets, shares, receiver);

        // Need to transfer before minting or ERC777s could reenter.
        asset.safeTransferFrom(msg.sender, address(this), assets);

        _mint(receiver, shares);

        emit Deposit(msg.sender, receiver, assets, shares);

        afterDeposit(assets, shares, receiver);
    }

    /**
     * @notice helper function that checks if msg.sender has the allowance to spend owner's shares.
     * @dev reverts if msg.sender != owner, and msg.sender does not have enough allowance.
     */
    function _checkAllowance(address owner, uint256 shares) internal {
        if (msg.sender != owner) {
            _spendAllowance(owner, msg.sender, shares);
        }
    }

    /**
     * @notice Withdraw assets from the cellar by redeeming shares.
     * @dev Unlike conventional ERC4626 contracts, this may not always return one asset to the receiver.
     *      Since there are no swaps involved in this function, the receiver may receive multiple
     *      assets. The value of all the assets returned will be equal to the amount defined by
     *      `assets` denominated in the `asset` of the cellar (eg. if `asset` is USDC and `assets`
     *      is 1000, then the receiver will receive $1000 worth of assets in either one or many
     *      tokens).
     * @param assets equivalent value of the assets withdrawn, denominated in the cellar's asset
     * @param receiver address that will receive withdrawn assets
     * @param owner address that owns the shares being redeemed
     * @return shares amount of shares redeemed
     */
    function withdraw(
        uint256 assets,
        address receiver,
        address owner
    ) public override nonReentrant returns (uint256 shares) {
        // Get data efficiently.
        (
            uint256 _totalAssets, // Store totalHoldings and pass into _withdrawInOrder if no stack errors.
            address[] memory _positions,
            ERC20[] memory positionAssets,
            uint256[] memory positionBalances,
            uint256[] memory withdrawableBalances
        ) = _getData();

        _takePerformanceFees(_totalAssets);

        // No need to check for rounding error, `previewWithdraw` rounds up.
        shares = _previewWithdraw(assets, _totalAssets);

        beforeWithdraw(assets, shares, receiver, owner);

        _checkAllowance(owner, shares);

        uint256 totalShares = totalSupply();

        _burn(owner, shares);

        emit Withdraw(msg.sender, receiver, owner, assets, shares);

        withdrawType == WithdrawType.ORDERLY
            ? _withdrawInOrder(assets, receiver, _positions, positionAssets, positionBalances, withdrawableBalances)
            : _withdrawInProportion(shares, totalShares, receiver, _positions, positionBalances, withdrawableBalances);

        afterWithdraw(assets, shares, receiver, owner);
    }

    /**
     * @notice Redeem shares to withdraw assets from the cellar.
     * @dev Unlike conventional ERC4626 contracts, this may not always return one asset to the receiver.
     *      Since there are no swaps involved in this function, the receiver may receive multiple
     *      assets. The value of all the assets returned will be equal to the amount defined by
     *      `assets` denominated in the `asset` of the cellar (eg. if `asset` is USDC and `assets`
     *      is 1000, then the receiver will receive $1000 worth of assets in either one or many
     *      tokens).
     * @param shares amount of shares to redeem
     * @param receiver address that will receive withdrawn assets
     * @param owner address that owns the shares being redeemed
     * @return assets equivalent value of the assets withdrawn, denominated in the cellar's asset
     */
    function redeem(
        uint256 shares,
        address receiver,
        address owner
    ) public override nonReentrant returns (uint256 assets) {
        // Get data efficiently.
        (
            uint256 _totalAssets, // Store totalHoldings and pass into _withdrawInOrder if no stack errors.
            address[] memory _positions,
            ERC20[] memory positionAssets,
            uint256[] memory positionBalances,
            uint256[] memory withdrawableBalances
        ) = _getData();

        _takePerformanceFees(_totalAssets);

        _checkAllowance(owner, shares);

        // Check for rounding error since we round down in previewRedeem.
        if ((assets = _convertToAssets(shares, _totalAssets)) == 0) revert Cellar__ZeroAssets();

        beforeWithdraw(assets, shares, receiver, owner);

        uint256 totalShares = totalSupply();

        _burn(owner, shares);

        emit Withdraw(msg.sender, receiver, owner, assets, shares);

        withdrawType == WithdrawType.ORDERLY
            ? _withdrawInOrder(assets, receiver, _positions, positionAssets, positionBalances, withdrawableBalances)
            : _withdrawInProportion(shares, totalShares, receiver, _positions, positionBalances, withdrawableBalances);

        afterWithdraw(assets, shares, receiver, owner);
    }

    /**
     * @dev Withdraw from positions in the order defined by `positions`. Used if the withdraw type
     *      is `ORDERLY`.
     * @param assets the amount of assets to withdraw from cellar
     * @param receiver the address to sent withdrawn assets to
     * @param _positions positions to withdraw from
     * @param positionAssets underlying asset for each position
     * @param positionBalances underlying balances for each position
     */
    function _withdrawInOrder(
        uint256 assets,
        address receiver,
        address[] memory _positions,
        ERC20[] memory positionAssets,
        uint256[] memory positionBalances,
        uint256[] memory withdrawableBalances
    ) internal {
        // Get the price router.
        PriceRouter priceRouter = PriceRouter(registry.getAddress(PRICE_ROUTER_REGISTRY_SLOT));

        for (uint256 i; i < _positions.length; i++) {
            // Move on to next position if this one is empty.
            if (positionBalances[i] == 0) continue;

            uint256 onePositionAsset = 10**positionAssets[i].decimals();
            uint256 exchangeRate = priceRouter.getExchangeRate(positionAssets[i], asset);

            // Denominate withdrawable position balance in cellar's asset.
            uint256 totalWithdrawableBalanceInAssets = withdrawableBalances[i].mulDivDown(
                exchangeRate,
                onePositionAsset
            );

            // We want to pull as much as we can from this position, but no more than needed.
            uint256 amount;

            if (totalWithdrawableBalanceInAssets > assets) {
                amount = assets.mulDivDown(onePositionAsset, exchangeRate);
                assets = 0;
            } else {
                amount = withdrawableBalances[i];
                assets = assets - totalWithdrawableBalanceInAssets;
            }

            // Withdraw from position.
            _withdrawFrom(_positions[i], amount, receiver);

            emit PulledFromPosition(_positions[i], amount);

            // Stop if no more assets to withdraw.
            if (assets == 0) break;
        }
        // If withdraw did not remove all assets owed, revert.
        if (assets > 0) revert Cellar__IncompleteWithdraw(assets);
    }

    /**
     * @dev Withdraw from each position proportional to that of shares redeemed. Used if the
     *      withdraw type is `PROPORTIONAL`.
     * @dev It is possible that the `amount` calculated to withdraw is zero. This is only a problem
     *      for a low percision ERC20, which we have no plans to support.
     * @param shares the user is burning to withdraw
     * @param totalShares the total amount of oustanding shares
     * @param receiver the address to sent withdrawn assets to
     * @param _positions positions to withdraw from
     * @param positionBalances underlying balances for each position
     */
    function _withdrawInProportion(
        uint256 shares,
        uint256 totalShares,
        address receiver,
        address[] memory _positions,
        uint256[] memory positionBalances,
        uint256[] memory withdrawableBalances
    ) internal {
        // Withdraw assets from positions in proportion to shares redeemed.
        for (uint256 i; i < _positions.length; i++) {
            address position = _positions[i];
            uint256 positionBalance = positionBalances[i];

            // Move on to next position if this one is empty.
            if (positionBalance == 0) continue;

            // Get the amount of assets to withdraw from this position based on proportion to shares redeemed.
            uint256 amount = positionBalance.mulDivDown(shares, totalShares);

            // If straetgist locks the enirety of a positions funds, then all withdraw calls revert.
            // If this happens,  goverance should vote out malicious strategist, then change withdraw type to in oder, and move bad position to back of queue.
            if (amount > withdrawableBalances[i]) revert Cellar__IlliquidWithdraw(position);

            // Withdraw from position to receiver.
            _withdrawFrom(position, amount, receiver);

            emit PulledFromPosition(position, amount);
        }
    }

    // ========================================= ACCOUNTING LOGIC =========================================

    /**
     * @notice The total amount of assets in the cellar.
     * @dev EIP4626 states totalAssets needs to be inclusive of fees.
     * Since performance fees mint shares, total assets remains unchanged,
     * so this implementation is inclusive of fees even though it does not explicitly show it.
     * @dev EIP4626 states totalAssets must not revert, but it is possible for `totalAssets` to revert
     * so it does NOT conform to ERC4626 standards.
     */
    function totalAssets() public view override returns (uint256 assets) {
        uint256 numOfPositions = positions.length;
        ERC20[] memory positionAssets = new ERC20[](numOfPositions);
        uint256[] memory balances = new uint256[](numOfPositions);

        for (uint256 i; i < numOfPositions; i++) {
            address position = positions[i];
            positionAssets[i] = _assetOf(position);
            balances[i] = _balanceOf(position);
        }

        PriceRouter priceRouter = PriceRouter(registry.getAddress(PRICE_ROUTER_REGISTRY_SLOT));
        assets = priceRouter.getValues(positionAssets, balances, asset);
    }

    /**
     * @notice The total amount of assets in the cellar.
     * @dev Excludes locked yield that hasn't been distributed.
     */
    function totalAssetsWithdrawable() public view returns (uint256 assets) {
        uint256 numOfPositions = positions.length;
        ERC20[] memory positionAssets = new ERC20[](numOfPositions);
        uint256[] memory balances = new uint256[](numOfPositions);

        for (uint256 i; i < numOfPositions; i++) {
            address position = positions[i];
            positionAssets[i] = _assetOf(position);
            balances[i] = _withdrawableFrom(position);
        }

        PriceRouter priceRouter = PriceRouter(registry.getAddress(PRICE_ROUTER_REGISTRY_SLOT));
        assets = priceRouter.getValues(positionAssets, balances, asset);
    }

    /**
     * @notice The amount of assets that the cellar would exchange for the amount of shares provided.
     * @notice is NOT inclusive of performance fees.
     * @param shares amount of shares to convert
     * @return assets the shares can be exchanged for
     */
    function convertToAssets(uint256 shares) public view override returns (uint256 assets) {
        assets = _convertToAssets(shares, totalAssets());
    }

    /**
     * @notice The amount of shares that the cellar would exchange for the amount of assets provided.
     * @param assets amount of assets to convert
     * @return shares the assets can be exchanged for
     */
    function convertToShares(uint256 assets) public view override returns (uint256 shares) {
        shares = _convertToShares(assets, totalAssets());
    }

    /**
     * @notice Simulate the effects of minting shares at the current block, given current on-chain conditions.
     * @param shares amount of shares to mint
     * @return assets that will be deposited
     */
    function previewMint(uint256 shares) public view override returns (uint256 assets) {
        uint256 _totalAssets = totalAssets();
        uint256 feeInAssets = _previewPerformanceFees(_totalAssets);
        assets = _previewMint(shares, _totalAssets - feeInAssets);
    }

    /**
     * @notice Simulate the effects of withdrawing assets at the current block, given current on-chain conditions.
     * @param assets amount of assets to withdraw
     * @return shares that will be redeemed
     */
    function previewWithdraw(uint256 assets) public view override returns (uint256 shares) {
        uint256 _totalAssets = totalAssets();
        uint256 feeInAssets = _previewPerformanceFees(_totalAssets);
        shares = _previewWithdraw(assets, _totalAssets - feeInAssets);
    }

    /**
     * @notice Simulate the effects of depositing assets at the current block, given current on-chain conditions.
     * @param assets amount of assets to deposit
     * @return shares that will be minted
     */
    function previewDeposit(uint256 assets) public view override returns (uint256 shares) {
        uint256 _totalAssets = totalAssets();
        uint256 feeInAssets = _previewPerformanceFees(_totalAssets);
        shares = _convertToShares(assets, _totalAssets - feeInAssets);
    }

    /**
     * @notice Simulate the effects of redeeming shares at the current block, given current on-chain conditions.
     * @param shares amount of shares to redeem
     * @return assets that will be returned
     */
    function previewRedeem(uint256 shares) public view override returns (uint256 assets) {
        uint256 _totalAssets = totalAssets();
        uint256 feeInAssets = _previewPerformanceFees(_totalAssets);
        assets = _convertToAssets(shares, _totalAssets - feeInAssets);
    }

    /**
     * @notice Finds the max amount of value an `owner` can remove from the cellar.
     * @param owner address of the user to find max value.
     * @param inShares if false, then returns value in terms of assets
     *                 if true then returns value in terms of shares
     */
    function _findMax(address owner, bool inShares) internal view returns (uint256 maxOut) {
        // Check if owner shares are locked, return 0 if so.
        uint256 lockBlock = userShareLockStartBlock[owner];
        if (lockBlock != 0) {
            uint256 blockSharesAreUnlocked = lockBlock + shareLockPeriod;
            if (blockSharesAreUnlocked > block.number) return 0;
        }
        // Get amount of assets to withdraw with fees accounted for.
        uint256 _totalAssets = totalAssets();
        uint256 feeInAssets = _previewPerformanceFees(_totalAssets);
        uint256 assets = _convertToAssets(balanceOf(owner), _totalAssets - feeInAssets);

        if (withdrawType == WithdrawType.ORDERLY) {
            uint256 withdrawable = totalAssetsWithdrawable();
            maxOut = assets <= withdrawable ? assets : withdrawable;
        } else {
            (, , , uint256[] memory positionBalances, uint256[] memory withdrawableBalances) = _getData();
            uint256 totalShares = totalSupply();
            uint256 shares = balanceOf(owner);
            uint256 smallestPercentWithdrawable = 1e18;
            for (uint256 i = 0; i < withdrawableBalances.length; i++) {
                if (positionBalances[i] == 0) continue;
                if (withdrawableBalances[i] == 0) return 0;
                uint256 percentWithdrawable = withdrawableBalances[i].mulDivDown(1e18, positionBalances[i]);
                if (percentWithdrawable < smallestPercentWithdrawable)
                    smallestPercentWithdrawable = percentWithdrawable;
            }
            uint256 userOwnershipPercent = shares.mulDivDown(1e18, totalShares);
            maxOut = userOwnershipPercent <= smallestPercentWithdrawable
                ? assets
                : (_totalAssets - feeInAssets).mulDivDown(smallestPercentWithdrawable, 1e18);
        }
        if (inShares) maxOut = _convertToShares(maxOut, _totalAssets - feeInAssets);
        // else leave maxOut in terms of assets.
    }

    /**
     * @notice Returns the max amount withdrawable by a user inclusive of performance fees
     * @dev EIP4626 states maxWithdraw must not revert, but it is possible for `totalAssets` to revert
     * so it does NOT conform to ERC4626 standards.
     * @param owner address to check maxWithdraw of.
     * @return the max amount of assets withdrawable by `owner`.
     */
    function maxWithdraw(address owner) public view override returns (uint256) {
        return _findMax(owner, false);
    }

    /**
     * @notice Returns the max amount shares redeemable by a user
     * @dev EIP4626 states maxRedeem must not revert, but it is possible for `totalAssets` to revert
     * so it does NOT conform to ERC4626 standards.
     * @param owner address to check maxRedeem of.
     * @return the max amount of shares redeemable by `owner`.
     */
    function maxRedeem(address owner) public view override returns (uint256) {
        return _findMax(owner, true);
    }

    /**
     * @dev Used to more efficiently convert amount of shares to assets using a stored `totalAssets` value.
     */
    function _convertToAssets(uint256 shares, uint256 _totalAssets) internal view returns (uint256 assets) {
        uint256 totalShares = totalSupply();

        assets = totalShares == 0
            ? shares.changeDecimals(18, asset.decimals())
            : shares.mulDivDown(_totalAssets, totalShares);
    }

    /**
     * @dev Used to more efficiently convert amount of assets to shares using a stored `totalAssets` value.
     */
    function _convertToShares(uint256 assets, uint256 _totalAssets) internal view returns (uint256 shares) {
        uint256 totalShares = totalSupply();

        shares = totalShares == 0
            ? assets.changeDecimals(asset.decimals(), 18)
            : assets.mulDivDown(totalShares, _totalAssets);
    }

    /**
     * @dev Used to more efficiently simulate minting shares using a stored `totalAssets` value.
     */
    function _previewMint(uint256 shares, uint256 _totalAssets) internal view returns (uint256 assets) {
        uint256 totalShares = totalSupply();

        assets = totalShares == 0
            ? shares.changeDecimals(18, asset.decimals())
            : shares.mulDivUp(_totalAssets, totalShares);
    }

    /**
     * @dev Used to more efficiently simulate withdrawing assets using a stored `totalAssets` value.
     */
    function _previewWithdraw(uint256 assets, uint256 _totalAssets) internal view returns (uint256 shares) {
        uint256 totalShares = totalSupply();

        shares = totalShares == 0
            ? assets.changeDecimals(asset.decimals(), 18)
            : assets.mulDivUp(totalShares, _totalAssets);
    }

    /**
     * @dev Used to efficiently get and store accounting information to avoid having to expensively
     *      recompute it.
     */
    function _getData()
        internal
        view
        returns (
            uint256 _totalAssets,
            address[] memory _positions,
            ERC20[] memory positionAssets,
            uint256[] memory positionBalances,
            uint256[] memory withdrawableBalances
        )
    {
        uint256 len = positions.length;

        _positions = new address[](len);
        positionAssets = new ERC20[](len);
        positionBalances = new uint256[](len);
        positionBalances = new uint256[](len);
        withdrawableBalances = new uint256[](len);

        for (uint256 i; i < len; i++) {
            address position = positions[i];

            _positions[i] = position;
            positionAssets[i] = _assetOf(position);
            positionBalances[i] = _balanceOf(position);
            withdrawableBalances[i] = _withdrawableFrom(position);
        }

        PriceRouter priceRouter = PriceRouter(registry.getAddress(PRICE_ROUTER_REGISTRY_SLOT));
        _totalAssets = priceRouter.getValues(positionAssets, positionBalances, asset);
    }

    // =========================================== POSITION LOGIC ===========================================

    /**
     * @notice Emitted on rebalancing positions.
     * @param fromPosition the address of the position rebalanced from
     * @param toPosition the address of the position rebalanced to
     * @param assetsFrom the amount of assets withdrawn from the position rebalanced from
     * @param assetsTo the amount of assets desposited to the position rebalanced to
     */
    event Rebalance(address indexed fromPosition, address indexed toPosition, uint256 assetsFrom, uint256 assetsTo);

    /**
     * @notice Emitted on when the rebalance deviation is changed.
     * @param oldDeviation the old rebalance deviation
     * @param newDeviation the new rebalance deviation
     */
    event RebalanceDeviationChanged(uint256 oldDeviation, uint256 newDeviation);

    /**
     * @notice totalAssets deviated outside the range set by `allowedRebalanceDeviation`.
     * @param assets the total assets in the cellar
     * @param min the minimum allowed assets
     * @param max the maximum allowed assets
     */
    error Cellar__TotalAssetDeviatedOutsideRange(uint256 assets, uint256 min, uint256 max);

    /**
     * @notice Total shares in a cellar changed when they should stay constant.
     * @param current the current amount of total shares
     * @param expected the expected amount of total shares
     */
    error Cellar__TotalSharesMustRemainConstant(uint256 current, uint256 expected);

    /**
     * @notice Total shares in a cellar changed when they should stay constant.
     * @param requested the requested rebalance  deviation
     * @param max the max rebalance deviation.
     */
    error Cellar__InvalidRebalanceDeviation(uint256 requested, uint256 max);

    uint64 public constant MAX_REBALANCE_DEVIATION = 0.1e18;

    /**
     * @notice The percent the total assets of a cellar may deviate during a rebalance call.
     */
    uint256 public allowedRebalanceDeviation = 0.003e18; // Currently set to 0.3%

    /**
     * @notice Allows governance to change this cellars rebalance deviation.
     * @param newDeviation the new reabalance deviation value.
     */
    function setRebalanceDeviation(uint256 newDeviation) external onlyOwner {
        if (newDeviation > MAX_REBALANCE_DEVIATION)
            revert Cellar__InvalidRebalanceDeviation(newDeviation, MAX_REBALANCE_DEVIATION);

        uint256 oldDeviation = allowedRebalanceDeviation;
        allowedRebalanceDeviation = newDeviation;

        emit RebalanceDeviationChanged(oldDeviation, newDeviation);
    }

    /**
     * @notice Move assets between positions. To move assets from/to this cellar's holdings, specify
     *         the address of this cellar as the `fromPosition`/`toPosition`.
     * @param fromPosition address of the position to move assets from
     * @param toPosition address of the position to move assets to
     * @param assetsFrom amount of assets to move from the from position
     */
    function rebalance(
        address fromPosition,
        address toPosition,
        uint256 assetsFrom,
        SwapRouter.Exchange exchange,
        bytes calldata params
    ) external onlyOwner whenNotShutdown nonReentrant returns (uint256 assetsTo) {
        // Check that position being rebalanced to is currently being used.
        if (!isPositionUsed[toPosition]) revert Cellar__InvalidPosition(address(toPosition));

        // Before making any external calls save the current `totalAssets` and `totalSupply`.
        uint256 assets = totalAssets();
        uint256 totalShares = totalSupply();

        // Withdraw from position.
        _withdrawFrom(fromPosition, assetsFrom, address(this));

        // Swap to the asset of the other position if necessary.
        ERC20 fromAsset = _assetOf(fromPosition);
        ERC20 toAsset = _assetOf(toPosition);
        assetsTo = fromAsset != toAsset
            ? _swap(fromAsset, toAsset, assetsFrom, exchange, params, address(this))
            : assetsFrom;

        // Deposit into position.
        _depositTo(toPosition, assetsTo);

        // After making every external call, check that the totalAssets haas not deviated significantly, and that totalShares is the same.
        uint256 minimumAllowedAssets = assets.mulDivUp((1e18 - allowedRebalanceDeviation), 1e18);
        uint256 maximumAllowedAssets = assets.mulDivDown((1e18 + allowedRebalanceDeviation), 1e18);
        assets = totalAssets();
        if (assets > maximumAllowedAssets || assets < minimumAllowedAssets)
            revert Cellar__TotalAssetDeviatedOutsideRange(assets, minimumAllowedAssets, maximumAllowedAssets);
        if (totalShares != totalSupply()) revert Cellar__TotalSharesMustRemainConstant(totalSupply(), totalShares);

        emit Rebalance(fromPosition, toPosition, assetsFrom, assetsTo);
    }

    // ============================================ LIMITS LOGIC ============================================

    /**
     * @notice Total amount of assets that can be deposited for a user.
     * @dev This function does not take into account performance fees.
     *      Performance fees would reduce `receiver`s `ownedAssets`,
     *      making the `assets` value returned lower than actual
     * @dev EIP4626 states maxDeposit must not revert, but it is possible for `totalAssets` to revert
     * so it does NOT conform to ERC4626 standards.
     * @param receiver address of account that would receive the shares
     * @return assets maximum amount of assets that can be deposited
     */
    function maxDeposit(address receiver) public view override returns (uint256 assets) {
        if (isShutdown) return 0;

        uint256 asssetDepositLimit = depositLimit;
        uint256 asssetLiquidityLimit = liquidityLimit;
        if (asssetDepositLimit == type(uint256).max && asssetLiquidityLimit == type(uint256).max)
            return type(uint256).max;

        // Get data efficiently.
        uint256 _totalAssets = totalAssets();
        uint256 ownedAssets = _convertToAssets(balanceOf(receiver), _totalAssets);

        uint256 leftUntilDepositLimit = asssetDepositLimit.subMinZero(ownedAssets);
        uint256 leftUntilLiquidityLimit = asssetLiquidityLimit.subMinZero(_totalAssets);

        // Only return the more relevant of the two.
        assets = Math.min(leftUntilDepositLimit, leftUntilLiquidityLimit);
    }

    /**
     * @notice Total amount of shares that can be minted for a user.
     * @dev This function does not take into account performance fees.
     *      Performance fees would reduce `receiver`s `ownedAssets`,
     *      making the `shares` value returned lower than actual
     * @dev EIP4626 states maxMint must not revert, but it is possible for `totalAssets` to revert
     * so it does NOT conform to ERC4626 standards.
     * @param receiver address of account that would receive the shares
     * @return shares maximum amount of shares that can be minted
     */
    function maxMint(address receiver) public view override returns (uint256) {
        uint256 amount = maxDeposit(receiver);
        return amount == type(uint256).max ? amount : convertToShares(amount);
    }

    // ========================================= FEES LOGIC =========================================

    /**
     * @notice Emitted when High Watermark is reset.
     * @param newHighWatermark new high watermark
     */
    event HighWatermarkReset(uint256 newHighWatermark);

    /**
     * @notice Attempted to send fee shares to strategist payout address, when address is not set.
     */
    error Cellar__PayoutNotSet();

    /**
     * @notice Resets High Watermark to equal current total assets.
     * @notice This function can be abused by Strategists, so it should only be callable by governance.
     */
    function resetHighWatermark() external onlyOwner {
        uint256 _totalAssets = totalAssets();
        feeData.highWatermark = _totalAssets;

        emit HighWatermarkReset(_totalAssets);
    }

    /**
     * @notice Calculates how many assets Strategist would earn performance fees
     * @param _totalAssets uint256 value of the total assets in the cellar
     * @return feeInAssets amount of assets to take as fees
     */
    function _previewPerformanceFees(uint256 _totalAssets) internal view returns (uint256 feeInAssets) {
        uint64 performanceFee = feeData.performanceFee;
        if (performanceFee == 0 || _totalAssets == 0) return 0;

        uint256 highWatermark = feeData.highWatermark;

        if (_totalAssets > highWatermark) {
            uint256 yield = _totalAssets - highWatermark;
            feeInAssets = yield.mulWadDown(performanceFee);
        }
    }

    /**
     * @notice Mints cellar performance fee shares if current share price is above high watermark
     * @dev If performance fees are minted, the resulting HWM will be greater than the current share price
     *      since performance fees dilute share value.
     * @param _totalAssets uint256 value of the total assets in the cellar
     */
    function _takePerformanceFees(uint256 _totalAssets) internal {
        uint256 feeInAssets = _previewPerformanceFees(_totalAssets);
        if (feeInAssets > 0) {
            uint256 platformFeesInShares = _convertToFees(_convertToShares(feeInAssets, _totalAssets));
            if (platformFeesInShares > 0) {
                feeData.highWatermark = _totalAssets;
                _mint(address(this), platformFeesInShares);
            }
        }
    }

    /**
     * @dev Calculate the amount of fees to mint such that value of fees after minting is not diluted.
     */
    function _convertToFees(uint256 feesInShares) internal view returns (uint256 fees) {
        // Saves an SLOAD.
        uint256 totalShares = totalSupply();

        // Get the amount of fees to mint. Without this, the value of fees minted would be slightly
        // diluted because total shares increased while total assets did not. This counteracts that.
        if (totalShares > feesInShares) {
            // Denominator is greater than zero
            uint256 denominator = totalShares - feesInShares;
            fees = feesInShares.mulDivUp(totalShares, denominator);
        }
        // If denominator is less than or equal to zero, `fees` should be zero.
    }

    /**
     * @notice Emitted when platform fees are send to the Sommelier chain.
     * @param feesInSharesRedeemed amount of fees redeemed for assets to send
     * @param feesInAssetsSent amount of assets fees were redeemed for that were sent
     */
    event SendFees(uint256 feesInSharesRedeemed, uint256 feesInAssetsSent);

    /**
     * @notice Transfer accrued fees to the Sommelier chain to distribute.
     * @dev Fees are accrued as shares and redeemed upon transfer.
     * @dev assumes cellar's accounting asset is able to be transferred and sent to Cosmos
     */
    function sendFees() external nonReentrant {
        address strategistPayoutAddress = feeData.strategistPayoutAddress;
        if (strategistPayoutAddress == address(0)) revert Cellar__PayoutNotSet();

        uint256 _totalAssets = totalAssets();

        // Since this action mints shares, calculate outstanding performance fees due.
        _takePerformanceFees(_totalAssets);

        uint256 totalFees = balanceOf(address(this));

        uint256 strategistFeeSharesDue = totalFees.mulWadDown(feeData.strategistPerformanceCut);

        // Calculate platform fees earned.
        uint256 elapsedTime = block.timestamp - lastAccrual;
        uint256 platformFeeInAssets = (_totalAssets * elapsedTime * feeData.platformFee) / 1e18 / 365 days;
        uint256 platformFees = _convertToFees(_convertToShares(platformFeeInAssets, _totalAssets));
        _mint(address(this), platformFees);
        totalFees += platformFees;

        strategistFeeSharesDue += platformFees.mulWadDown(feeData.strategistPlatformCut);
        if (strategistFeeSharesDue > 0) {
            //transfer shares to strategist
            _transfer(address(this), strategistPayoutAddress, strategistFeeSharesDue);

            totalFees -= strategistFeeSharesDue;
        }

        lastAccrual = uint32(block.timestamp);

        // Redeem our fee shares for assets to send to the fee distributor module.
        uint256 assets = _convertToAssets(totalFees, _totalAssets);
        if (assets > 0) {
            // Without this, assets paid out as fees would be counted as a loss.
            feeData.highWatermark -= assets;

            _burn(address(this), totalFees);

            // Transfer assets to a fee distributor on the Sommelier chain.
            IGravity gravityBridge = IGravity(registry.getAddress(0));
            asset.safeApprove(address(gravityBridge), assets);
            gravityBridge.sendToCosmos(address(asset), feeData.feesDistributor, assets);
        }

        emit SendFees(totalFees, assets);
    }

    // ========================================== HELPER FUNCTIONS ==========================================

    /**
     * @dev Deposit into a position according to its position type and update related state.
     * @param position address to deposit funds into
     * @param assets the amount of assets to deposit into the position
     */
    function _depositTo(address position, uint256 assets) internal {
        PositionType positionType = getPositionType[position];

        // Deposit into position.
        if (positionType == PositionType.ERC4626 || positionType == PositionType.Cellar) {
            ERC4626(position).asset().safeApprove(position, assets);
            ERC4626(position).deposit(assets, address(this));
        }
    }

    /**
     * @dev Withdraw from a position according to its position type and update related state.
     * @param position address to withdraw funds from
     * @param assets the amount of assets to withdraw from the position
     * @param receiver the address to sent withdrawn assets to
     */
    function _withdrawFrom(
        address position,
        uint256 assets,
        address receiver
    ) internal {
        PositionType positionType = getPositionType[position];

        // Withdraw from position.
        if (positionType == PositionType.ERC4626 || positionType == PositionType.Cellar) {
            ERC4626(position).withdraw(assets, receiver, address(this));
        } else {
            if (receiver != address(this)) ERC20(position).safeTransfer(receiver, assets);
        }
    }

    /**
     * @dev Get the withdrawable balance of a position according to its position type.
     * @param position position to get the withdrawable balance of
     */
    function _withdrawableFrom(address position) internal view returns (uint256) {
        PositionType positionType = getPositionType[position];

        if (positionType == PositionType.ERC4626 || positionType == PositionType.Cellar) {
            return ERC4626(position).maxWithdraw(address(this));
        } else {
            return ERC20(position).balanceOf(address(this));
        }
    }

    /**
     * @dev Get the balance of a position according to its position type.
     * @dev For ERC4626 position balances, this uses `previewRedeem` as opposed
     *      to `convertToAssets` so that balanceOf ERC4626 positions includes fees taken on withdraw.
     * @param position position to get the balance of
     */
    function _balanceOf(address position) internal view returns (uint256) {
        PositionType positionType = getPositionType[position];

        if (positionType == PositionType.ERC4626 || positionType == PositionType.Cellar) {
            return ERC4626(position).previewRedeem(ERC4626(position).balanceOf(address(this)));
        } else {
            return ERC20(position).balanceOf(address(this));
        }
    }

    /**
     * @dev Get the asset of a position according to its position type.
     * @param position to get the asset of
     */
    function _assetOf(address position) internal view returns (ERC20) {
        PositionType positionType = getPositionType[position];

        if (positionType == PositionType.ERC4626 || positionType == PositionType.Cellar) {
            return ERC4626(position).asset();
        } else {
            return ERC20(position);
        }
    }

    /**
     * @notice Attempted to swap with bad parameters.
     */
    error Cellar__WrongSwapParams();

    /**
     * @dev Perform a swap using the swap router and check that it behaves as expected.
     * @param assetIn the asset to sell
     * @param amountIn the amount of `assetIn` to sell
     * @param exchange the exchange to sell `assetIn` on
     * @param params Abi encoded swap parameters dependent on the `exchange` selected.
     *               Refer to SwapRouter.sol for `params` makeup
     * @param receiver the address to send the swapped assets to
     */
    function _swap(
        ERC20 assetIn,
        ERC20 assetOut,
        uint256 amountIn,
        SwapRouter.Exchange exchange,
        bytes calldata params,
        address receiver
    ) internal returns (uint256 amountOut) {
        // Store the expected amount of the asset in that we expect to have after the swap.
        uint256 expectedAssetsInAfter = assetIn.balanceOf(address(this)) - amountIn;

        // Get the address of the latest swap router.
        SwapRouter swapRouter = SwapRouter(registry.getAddress(1));

        // Approve swap router to swap assets.
        assetIn.safeApprove(address(swapRouter), amountIn);

        // Perform swap.
        amountOut = swapRouter.swap(exchange, params, receiver, assetIn, assetOut);

        // Check that the amount of assets swapped is what is expected. Will revert if the `params`
        // specified a different amount of assets to swap then `amountIn`.
        if (assetIn.balanceOf(address(this)) != expectedAssetsInAfter) revert Cellar__WrongSwapParams();
    }
}

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.8.0;

import { ERC20Permit } from "@openzeppelin/contracts/token/ERC20/extensions/draft-ERC20Permit.sol";
import { ERC20 } from "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import { SafeERC20 } from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import { Math } from "src/utils/Math.sol";

/// @notice Minimal ERC4626 tokenized Vault implementation.
/// @author Solmate (https://github.com/Rari-Capital/solmate/blob/main/src/mixins/ERC4626.sol)
abstract contract ERC4626 is ERC20, ERC20Permit {
    using SafeERC20 for ERC20;
    using Math for uint256;

    /*//////////////////////////////////////////////////////////////
                                 EVENTS
    //////////////////////////////////////////////////////////////*/

    event Deposit(address indexed caller, address indexed owner, uint256 assets, uint256 shares);

    event Withdraw(
        address indexed caller,
        address indexed receiver,
        address indexed owner,
        uint256 assets,
        uint256 shares
    );

    /*//////////////////////////////////////////////////////////////
                               IMMUTABLES
    //////////////////////////////////////////////////////////////*/

    ERC20 public immutable asset;

    constructor(
        ERC20 _asset,
        string memory _name,
        string memory _symbol
    ) ERC20(_name, _symbol) ERC20Permit(_name) {
        asset = _asset;
    }

    /*//////////////////////////////////////////////////////////////
                        DEPOSIT/WITHDRAWAL LOGIC
    //////////////////////////////////////////////////////////////*/

    function deposit(uint256 assets, address receiver) public virtual returns (uint256 shares) {
        // Check for rounding error since we round down in previewDeposit.
        require((shares = previewDeposit(assets)) != 0, "ZERO_SHARES");

        beforeDeposit(assets, shares, receiver);

        // Need to transfer before minting or ERC777s could reenter.
        asset.safeTransferFrom(msg.sender, address(this), assets);

        _mint(receiver, shares);

        emit Deposit(msg.sender, receiver, assets, shares);

        afterDeposit(assets, shares, receiver);
    }

    function mint(uint256 shares, address receiver) public virtual returns (uint256 assets) {
        assets = previewMint(shares); // No need to check for rounding error, previewMint rounds up.

        beforeDeposit(assets, shares, receiver);

        // Need to transfer before minting or ERC777s could reenter.
        asset.safeTransferFrom(msg.sender, address(this), assets);

        _mint(receiver, shares);

        emit Deposit(msg.sender, receiver, assets, shares);

        afterDeposit(assets, shares, receiver);
    }

    function withdraw(
        uint256 assets,
        address receiver,
        address owner
    ) public virtual returns (uint256 shares) {
        shares = previewWithdraw(assets); // No need to check for rounding error, previewWithdraw rounds up.

        if (msg.sender != owner) {
            _spendAllowance(owner, msg.sender, shares);
        }

        beforeWithdraw(assets, shares, receiver, owner);

        _burn(owner, shares);

        emit Withdraw(msg.sender, receiver, owner, assets, shares);

        asset.safeTransfer(receiver, assets);

        afterWithdraw(assets, shares, receiver, owner);
    }

    function redeem(
        uint256 shares,
        address receiver,
        address owner
    ) public virtual returns (uint256 assets) {
        if (msg.sender != owner) {
            _spendAllowance(owner, msg.sender, shares);
        }

        // Check for rounding error since we round down in previewRedeem.
        require((assets = previewRedeem(shares)) != 0, "ZERO_ASSETS");

        beforeWithdraw(assets, shares, receiver, owner);

        _burn(owner, shares);

        emit Withdraw(msg.sender, receiver, owner, assets, shares);

        asset.safeTransfer(receiver, assets);

        afterWithdraw(assets, shares, receiver, owner);
    }

    /*//////////////////////////////////////////////////////////////
                            ACCOUNTING LOGIC
    //////////////////////////////////////////////////////////////*/

    function totalAssets() public view virtual returns (uint256);

    function convertToShares(uint256 assets) public view virtual returns (uint256) {
        uint256 supply = totalSupply(); // Saves an extra SLOAD if totalSupply is non-zero.

        return supply == 0 ? assets : assets.mulDivDown(supply, totalAssets());
    }

    function convertToAssets(uint256 shares) public view virtual returns (uint256) {
        uint256 supply = totalSupply(); // Saves an extra SLOAD if totalSupply is non-zero.

        return supply == 0 ? shares : shares.mulDivDown(totalAssets(), supply);
    }

    function previewDeposit(uint256 assets) public view virtual returns (uint256) {
        return convertToShares(assets);
    }

    function previewMint(uint256 shares) public view virtual returns (uint256) {
        uint256 supply = totalSupply(); // Saves an extra SLOAD if totalSupply is non-zero.

        return supply == 0 ? shares : shares.mulDivUp(totalAssets(), supply);
    }

    function previewWithdraw(uint256 assets) public view virtual returns (uint256) {
        uint256 supply = totalSupply(); // Saves an extra SLOAD if totalSupply is non-zero.

        return supply == 0 ? assets : assets.mulDivUp(supply, totalAssets());
    }

    function previewRedeem(uint256 shares) public view virtual returns (uint256) {
        return convertToAssets(shares);
    }

    /*//////////////////////////////////////////////////////////////
                     DEPOSIT/WITHDRAWAL LIMIT LOGIC
    //////////////////////////////////////////////////////////////*/

    function maxDeposit(address) public view virtual returns (uint256) {
        return type(uint256).max;
    }

    function maxMint(address) public view virtual returns (uint256) {
        return type(uint256).max;
    }

    function maxWithdraw(address owner) public view virtual returns (uint256) {
        return convertToAssets(balanceOf(owner));
    }

    function maxRedeem(address owner) public view virtual returns (uint256) {
        return balanceOf(owner);
    }

    /*//////////////////////////////////////////////////////////////
                          INTERNAL HOOKS LOGIC
    //////////////////////////////////////////////////////////////*/

    function beforeDeposit(
        uint256 assets,
        uint256 shares,
        address receiver
    ) internal virtual {}

    function afterDeposit(
        uint256 assets,
        uint256 shares,
        address receiver
    ) internal virtual {}

    function beforeWithdraw(
        uint256 assets,
        uint256 shares,
        address receiver,
        address owner
    ) internal virtual {}

    function afterWithdraw(
        uint256 assets,
        uint256 shares,
        address receiver,
        address owner
    ) internal virtual {}
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/ERC20.sol)

pragma solidity ^0.8.0;

import "./IERC20.sol";
import "./extensions/IERC20Metadata.sol";
import "../../utils/Context.sol";

/**
 * @dev Implementation of the {IERC20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 * For a generic mechanism see {ERC20PresetMinterPauser}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * We have followed general OpenZeppelin Contracts guidelines: functions revert
 * instead returning `false` on failure. This behavior is nonetheless
 * conventional and does not conflict with the expectations of ERC20
 * applications.
 *
 * Additionally, an {Approval} event is emitted on calls to {transferFrom}.
 * This allows applications to reconstruct the allowance for all accounts just
 * by listening to said events. Other implementations of the EIP may not emit
 * these events, as it isn't required by the specification.
 *
 * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
 * functions have been added to mitigate the well-known issues around setting
 * allowances. See {IERC20-approve}.
 */
contract ERC20 is Context, IERC20, IERC20Metadata {
    mapping(address => uint256) private _balances;

    mapping(address => mapping(address => uint256)) private _allowances;

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;

    /**
     * @dev Sets the values for {name} and {symbol}.
     *
     * The default value of {decimals} is 18. To select a different value for
     * {decimals} you should overload it.
     *
     * All two of these values are immutable: they can only be set once during
     * construction.
     */
    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

    /**
     * @dev Returns the name of the token.
     */
    function name() public view virtual override returns (string memory) {
        return _name;
    }

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    /**
     * @dev Returns the number of decimals used to get its user representation.
     * For example, if `decimals` equals `2`, a balance of `505` tokens should
     * be displayed to a user as `5.05` (`505 / 10 ** 2`).
     *
     * Tokens usually opt for a value of 18, imitating the relationship between
     * Ether and Wei. This is the value {ERC20} uses, unless this function is
     * overridden;
     *
     * NOTE: This information is only used for _display_ purposes: it in
     * no way affects any of the arithmetic of the contract, including
     * {IERC20-balanceOf} and {IERC20-transfer}.
     */
    function decimals() public view virtual override returns (uint8) {
        return 18;
    }

    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply() public view virtual override returns (uint256) {
        return _totalSupply;
    }

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view virtual override returns (uint256) {
        return _balances[account];
    }

    /**
     * @dev See {IERC20-transfer}.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(address to, uint256 amount) public virtual override returns (bool) {
        address owner = _msgSender();
        _transfer(owner, to, amount);
        return true;
    }

    /**
     * @dev See {IERC20-allowance}.
     */
    function allowance(address owner, address spender) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }

    /**
     * @dev See {IERC20-approve}.
     *
     * NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on
     * `transferFrom`. This is semantically equivalent to an infinite approval.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        address owner = _msgSender();
        _approve(owner, spender, amount);
        return true;
    }

    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {ERC20}.
     *
     * NOTE: Does not update the allowance if the current allowance
     * is the maximum `uint256`.
     *
     * Requirements:
     *
     * - `from` and `to` cannot be the zero address.
     * - `from` must have a balance of at least `amount`.
     * - the caller must have allowance for ``from``'s tokens of at least
     * `amount`.
     */
    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) public virtual override returns (bool) {
        address spender = _msgSender();
        _spendAllowance(from, spender, amount);
        _transfer(from, to, amount);
        return true;
    }

    /**
     * @dev Atomically increases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        address owner = _msgSender();
        _approve(owner, spender, allowance(owner, spender) + addedValue);
        return true;
    }

    /**
     * @dev Atomically decreases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `spender` must have allowance for the caller of at least
     * `subtractedValue`.
     */
    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
        address owner = _msgSender();
        uint256 currentAllowance = allowance(owner, spender);
        require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
        unchecked {
            _approve(owner, spender, currentAllowance - subtractedValue);
        }

        return true;
    }

    /**
     * @dev Moves `amount` of tokens from `from` to `to`.
     *
     * This internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `from` must have a balance of at least `amount`.
     */
    function _transfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {
        require(from != address(0), "ERC20: transfer from the zero address");
        require(to != address(0), "ERC20: transfer to the zero address");

        _beforeTokenTransfer(from, to, amount);

        uint256 fromBalance = _balances[from];
        require(fromBalance >= amount, "ERC20: transfer amount exceeds balance");
        unchecked {
            _balances[from] = fromBalance - amount;
        }
        _balances[to] += amount;

        emit Transfer(from, to, amount);

        _afterTokenTransfer(from, to, amount);
    }

    /** @dev Creates `amount` tokens and assigns them to `account`, increasing
     * the total supply.
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     */
    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");

        _beforeTokenTransfer(address(0), account, amount);

        _totalSupply += amount;
        _balances[account] += amount;
        emit Transfer(address(0), account, amount);

        _afterTokenTransfer(address(0), account, amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`, reducing the
     * total supply.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     * - `account` must have at least `amount` tokens.
     */
    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");

        _beforeTokenTransfer(account, address(0), amount);

        uint256 accountBalance = _balances[account];
        require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
        unchecked {
            _balances[account] = accountBalance - amount;
        }
        _totalSupply -= amount;

        emit Transfer(account, address(0), amount);

        _afterTokenTransfer(account, address(0), amount);
    }

    /**
     * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
     *
     * This internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     */
    function _approve(
        address owner,
        address spender,
        uint256 amount
    ) internal virtual {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");

        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    /**
     * @dev Updates `owner` s allowance for `spender` based on spent `amount`.
     *
     * Does not update the allowance amount in case of infinite allowance.
     * Revert if not enough allowance is available.
     *
     * Might emit an {Approval} event.
     */
    function _spendAllowance(
        address owner,
        address spender,
        uint256 amount
    ) internal virtual {
        uint256 currentAllowance = allowance(owner, spender);
        if (currentAllowance != type(uint256).max) {
            require(currentAllowance >= amount, "ERC20: insufficient allowance");
            unchecked {
                _approve(owner, spender, currentAllowance - amount);
            }
        }
    }

    /**
     * @dev Hook that is called before any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * will be transferred to `to`.
     * - when `from` is zero, `amount` tokens will be minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens will be burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {}

    /**
     * @dev Hook that is called after any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * has been transferred to `to`.
     * - when `from` is zero, `amount` tokens have been minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens have been burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _afterTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {}
}

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

pragma solidity ^0.8.0;

import "../utils/Context.sol";

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

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

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }

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

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

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

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

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.4.1) (utils/math/SafeCast.sol)

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

    /**
     * @dev Returns the downcasted int248 from int256, reverting on
     * overflow (when the input is less than smallest int248 or
     * greater than largest int248).
     *
     * Counterpart to Solidity's `int248` operator.
     *
     * Requirements:
     *
     * - input must fit into 248 bits
     *
     * _Available since v4.7._
     */
    function toInt248(int256 value) internal pure returns (int248) {
        require(value >= type(int248).min && value <= type(int248).max, "SafeCast: value doesn't fit in 248 bits");
        return int248(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
     *
     * _Available since v4.7._
     */
    function toInt240(int256 value) internal pure returns (int240) {
        require(value >= type(int240).min && value <= type(int240).max, "SafeCast: value doesn't fit in 240 bits");
        return int240(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
     *
     * _Available since v4.7._
     */
    function toInt232(int256 value) internal pure returns (int232) {
        require(value >= type(int232).min && value <= type(int232).max, "SafeCast: value doesn't fit in 232 bits");
        return int232(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
     *
     * _Available since v4.7._
     */
    function toInt224(int256 value) internal pure returns (int224) {
        require(value >= type(int224).min && value <= type(int224).max, "SafeCast: value doesn't fit in 224 bits");
        return int224(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
     *
     * _Available since v4.7._
     */
    function toInt216(int256 value) internal pure returns (int216) {
        require(value >= type(int216).min && value <= type(int216).max, "SafeCast: value doesn't fit in 216 bits");
        return int216(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
     *
     * _Available since v4.7._
     */
    function toInt208(int256 value) internal pure returns (int208) {
        require(value >= type(int208).min && value <= type(int208).max, "SafeCast: value doesn't fit in 208 bits");
        return int208(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
     *
     * _Available since v4.7._
     */
    function toInt200(int256 value) internal pure returns (int200) {
        require(value >= type(int200).min && value <= type(int200).max, "SafeCast: value doesn't fit in 200 bits");
        return int200(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
     *
     * _Available since v4.7._
     */
    function toInt192(int256 value) internal pure returns (int192) {
        require(value >= type(int192).min && value <= type(int192).max, "SafeCast: value doesn't fit in 192 bits");
        return int192(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
     *
     * _Available since v4.7._
     */
    function toInt184(int256 value) internal pure returns (int184) {
        require(value >= type(int184).min && value <= type(int184).max, "SafeCast: value doesn't fit in 184 bits");
        return int184(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
     *
     * _Available since v4.7._
     */
    function toInt176(int256 value) internal pure returns (int176) {
        require(value >= type(int176).min && value <= type(int176).max, "SafeCast: value doesn't fit in 176 bits");
        return int176(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
     *
     * _Available since v4.7._
     */
    function toInt168(int256 value) internal pure returns (int168) {
        require(value >= type(int168).min && value <= type(int168).max, "SafeCast: value doesn't fit in 168 bits");
        return int168(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
     *
     * _Available since v4.7._
     */
    function toInt160(int256 value) internal pure returns (int160) {
        require(value >= type(int160).min && value <= type(int160).max, "SafeCast: value doesn't fit in 160 bits");
        return int160(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
     *
     * _Available since v4.7._
     */
    function toInt152(int256 value) internal pure returns (int152) {
        require(value >= type(int152).min && value <= type(int152).max, "SafeCast: value doesn't fit in 152 bits");
        return int152(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
     *
     * _Available since v4.7._
     */
    function toInt144(int256 value) internal pure returns (int144) {
        require(value >= type(int144).min && value <= type(int144).max, "SafeCast: value doesn't fit in 144 bits");
        return int144(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
     *
     * _Available since v4.7._
     */
    function toInt136(int256 value) internal pure returns (int136) {
        require(value >= type(int136).min && value <= type(int136).max, "SafeCast: value doesn't fit in 136 bits");
        return int136(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
     *
     * _Available since v3.1._
     */
    function toInt128(int256 value) internal pure returns (int128) {
        require(value >= type(int128).min && value <= type(int128).max, "SafeCast: value doesn't fit in 128 bits");
        return int128(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
     *
     * _Available since v4.7._
     */
    function toInt120(int256 value) internal pure returns (int120) {
        require(value >= type(int120).min && value <= type(int120).max, "SafeCast: value doesn't fit in 120 bits");
        return int120(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
     *
     * _Available since v4.7._
     */
    function toInt112(int256 value) internal pure returns (int112) {
        require(value >= type(int112).min && value <= type(int112).max, "SafeCast: value doesn't fit in 112 bits");
        return int112(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
     *
     * _Available since v4.7._
     */
    function toInt104(int256 value) internal pure returns (int104) {
        require(value >= type(int104).min && value <= type(int104).max, "SafeCast: value doesn't fit in 104 bits");
        return int104(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
     *
     * _Available since v4.7._
     */
    function toInt96(int256 value) internal pure returns (int96) {
        require(value >= type(int96).min && value <= type(int96).max, "SafeCast: value doesn't fit in 96 bits");
        return int96(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
     *
     * _Available since v4.7._
     */
    function toInt88(int256 value) internal pure returns (int88) {
        require(value >= type(int88).min && value <= type(int88).max, "SafeCast: value doesn't fit in 88 bits");
        return int88(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
     *
     * _Available since v4.7._
     */
    function toInt80(int256 value) internal pure returns (int80) {
        require(value >= type(int80).min && value <= type(int80).max, "SafeCast: value doesn't fit in 80 bits");
        return int80(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
     *
     * _Available since v4.7._
     */
    function toInt72(int256 value) internal pure returns (int72) {
        require(value >= type(int72).min && value <= type(int72).max, "SafeCast: value doesn't fit in 72 bits");
        return int72(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
     *
     * _Available since v3.1._
     */
    function toInt64(int256 value) internal pure returns (int64) {
        require(value >= type(int64).min && value <= type(int64).max, "SafeCast: value doesn't fit in 64 bits");
        return int64(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
     *
     * _Available since v4.7._
     */
    function toInt56(int256 value) internal pure returns (int56) {
        require(value >= type(int56).min && value <= type(int56).max, "SafeCast: value doesn't fit in 56 bits");
        return int56(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
     *
     * _Available since v4.7._
     */
    function toInt48(int256 value) internal pure returns (int48) {
        require(value >= type(int48).min && value <= type(int48).max, "SafeCast: value doesn't fit in 48 bits");
        return int48(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
     *
     * _Available since v4.7._
     */
    function toInt40(int256 value) internal pure returns (int40) {
        require(value >= type(int40).min && value <= type(int40).max, "SafeCast: value doesn't fit in 40 bits");
        return int40(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
     *
     * _Available since v3.1._
     */
    function toInt32(int256 value) internal pure returns (int32) {
        require(value >= type(int32).min && value <= type(int32).max, "SafeCast: value doesn't fit in 32 bits");
        return int32(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
     *
     * _Available since v4.7._
     */
    function toInt24(int256 value) internal pure returns (int24) {
        require(value >= type(int24).min && value <= type(int24).max, "SafeCast: value doesn't fit in 24 bits");
        return int24(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
     *
     * _Available since v3.1._
     */
    function toInt16(int256 value) internal pure returns (int16) {
        require(value >= type(int16).min && value <= type(int16).max, "SafeCast: value doesn't fit in 16 bits");
        return int16(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
     *
     * _Available since v3.1._
     */
    function toInt8(int256 value) internal pure returns (int8) {
        require(value >= type(int8).min && value <= type(int8).max, "SafeCast: value doesn't fit in 8 bits");
        return int8(value);
    }

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

// SPDX-License-Identifier: Apache-2.0
pragma solidity 0.8.16;

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

contract Registry is Ownable {
    // ============================================= ADDRESS CONFIG =============================================

    /**
     * @notice Emitted when the address of a contract is changed.
     * @param id value representing the unique ID tied to the changed contract
     * @param oldAddress address of the contract before the change
     * @param newAddress address of the contract after the contract
     */
    event AddressChanged(uint256 indexed id, address oldAddress, address newAddress);

    /**
     * @notice Attempted to set the address of a contract that is not registered.
     * @param id id of the contract that is not registered
     */
    error Registry__ContractNotRegistered(uint256 id);

    /**
     * @notice Emitted when depositor privilege changes.
     * @param depositor depositor address
     * @param state the new state of the depositor privilege
     */
    event DepositorOnBehalfChanged(address depositor, bool state);

    /**
     * @notice The unique ID that the next registered contract will have.
     */
    uint256 public nextId;

    /**
     * @notice Get the address associated with an id.
     */
    mapping(uint256 => address) public getAddress;

    /**
     * @notice In order for an address to make deposits on behalf of users they must be approved.
     */
    mapping(address => bool) public approvedForDepositOnBehalf;

    /**
     * @notice toggles a depositors  ability to deposit into cellars on behalf of users.
     */
    function setApprovedForDepositOnBehalf(address depositor, bool state) external onlyOwner {
        approvedForDepositOnBehalf[depositor] = state;
        emit DepositorOnBehalfChanged(depositor, state);
    }

    /**
     * @notice Set the address of the contract at a given id.
     */
    function setAddress(uint256 id, address newAddress) external onlyOwner {
        if (id >= nextId) revert Registry__ContractNotRegistered(id);

        emit AddressChanged(id, getAddress[id], newAddress);

        getAddress[id] = newAddress;
    }

    // ============================================= INITIALIZATION =============================================

    /**
     * @param gravityBridge address of GravityBridge contract
     * @param swapRouter address of SwapRouter contract
     * @param priceRouter address of PriceRouter contract
     */
    constructor(
        address gravityBridge,
        address swapRouter,
        address priceRouter
    ) Ownable() {
        _register(gravityBridge);
        _register(swapRouter);
        _register(priceRouter);
    }

    // ============================================ REGISTER CONFIG ============================================

    /**
     * @notice Emitted when a new contract is registered.
     * @param id value representing the unique ID tied to the new contract
     * @param newContract address of the new contract
     */
    event Registered(uint256 indexed id, address indexed newContract);

    /**
     * @notice Register the address of a new contract.
     * @param newContract address of the new contract to register
     */
    function register(address newContract) external onlyOwner {
        _register(newContract);
    }

    function _register(address newContract) internal {
        getAddress[nextId] = newContract;

        emit Registered(nextId, newContract);

        nextId++;
    }
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity 0.8.16;

import { ERC20 } from "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import { Multicall } from "src/base/Multicall.sol";
import { SafeERC20 } from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import { IUniswapV2Router02 as IUniswapV2Router } from "src/interfaces/external/IUniswapV2Router02.sol";
import { IUniswapV3Router } from "src/interfaces/external/IUniswapV3Router.sol";

/**
 * @title Sommelier Swap Router
 * @notice Provides a universal interface allowing Sommelier contracts to interact with multiple
 *         different exchanges to perform swaps.
 * @dev Perform multiple swaps using Multicall.
 * @author crispymangoes, Brian Le
 */
contract SwapRouter is Multicall {
    using SafeERC20 for ERC20;

    /**
     * @param UNIV2 Uniswap V2
     * @param UNIV3 Uniswap V3
     */
    enum Exchange {
        UNIV2,
        UNIV3
    }

    /**
     * @notice Get the selector of the function to call in order to perform swap with a given exchange.
     */
    mapping(Exchange => bytes4) public getExchangeSelector;

    // ========================================== CONSTRUCTOR ==========================================

    /**
     * @notice Uniswap V2 swap router contract.
     */
    IUniswapV2Router public immutable uniswapV2Router; // 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D

    /**
     * @notice Uniswap V3 swap router contract.
     */
    IUniswapV3Router public immutable uniswapV3Router; // 0xE592427A0AEce92De3Edee1F18E0157C05861564

    /**
     * @param _uniswapV2Router address of the Uniswap V2 swap router contract
     * @param _uniswapV3Router address of the Uniswap V3 swap router contract
     */
    constructor(IUniswapV2Router _uniswapV2Router, IUniswapV3Router _uniswapV3Router) {
        // Set up all exchanges.
        uniswapV2Router = _uniswapV2Router;
        uniswapV3Router = _uniswapV3Router;

        // Set up mapping between IDs and selectors.
        getExchangeSelector[Exchange.UNIV2] = SwapRouter(this).swapWithUniV2.selector;
        getExchangeSelector[Exchange.UNIV3] = SwapRouter(this).swapWithUniV3.selector;
    }

    // ======================================= SWAP OPERATIONS =======================================

    /**
     * @notice Attempted to perform a swap that reverted without a message.
     */
    error SwapRouter__SwapReverted();

    /**
     * @notice Attempted to perform a swap with mismatched assetIn and swap data.
     * @param actual the address encoded into the swap data
     * @param expected the address passed in with assetIn
     */
    error SwapRouter__AssetInMisMatch(address actual, address expected);

    /**
     * @notice Attempted to perform a swap with mismatched assetOut and swap data.
     * @param actual the address encoded into the swap data
     * @param expected the address passed in with assetIn
     */
    error SwapRouter__AssetOutMisMatch(address actual, address expected);

    /**
     * @notice Perform a swap using a supported exchange.
     * @param exchange value dictating which exchange to use to make the swap
     * @param swapData encoded data used for the swap
     * @param receiver address to send the received assets to
     * @return amountOut amount of assets received from the swap
     */
    function swap(
        Exchange exchange,
        bytes memory swapData,
        address receiver,
        ERC20 assetIn,
        ERC20 assetOut
    ) external returns (uint256 amountOut) {
        // Route swap call to appropriate function using selector.
        (bool success, bytes memory result) = address(this).delegatecall(
            abi.encodeWithSelector(getExchangeSelector[exchange], swapData, receiver, assetIn, assetOut)
        );

        if (!success) {
            // If there is return data, the call reverted with a reason or a custom error so we
            // bubble up the error message.
            if (result.length > 0) {
                assembly {
                    let returndata_size := mload(result)
                    revert(add(32, result), returndata_size)
                }
            } else {
                revert SwapRouter__SwapReverted();
            }
        }

        amountOut = abi.decode(result, (uint256));
    }

    /**
     * @notice Perform a swap using Uniswap V2.
     * @param swapData bytes variable storing the following swap information:
     *      address[] path: array of addresses dictating what swap path to follow
     *      uint256 amount: amount of the first asset in the path to swap
     *      uint256 amountOutMin: the minimum amount of the last asset in the path to receive
     * @param receiver address to send the received assets to
     * @return amountOut amount of assets received from the swap
     */
    function swapWithUniV2(
        bytes memory swapData,
        address receiver,
        ERC20 assetIn,
        ERC20 assetOut
    ) public returns (uint256 amountOut) {
        (address[] memory path, uint256 amount, uint256 amountOutMin) = abi.decode(
            swapData,
            (address[], uint256, uint256)
        );

        // Check that path matches assetIn and assetOut.
        if (assetIn != ERC20(path[0])) revert SwapRouter__AssetInMisMatch(path[0], address(assetIn));
        if (assetOut != ERC20(path[path.length - 1]))
            revert SwapRouter__AssetOutMisMatch(path[path.length - 1], address(assetOut));

        // Transfer assets to this contract to swap.
        assetIn.safeTransferFrom(msg.sender, address(this), amount);

        // Approve assets to be swapped through the router.
        assetIn.safeApprove(address(uniswapV2Router), amount);

        // Execute the swap.
        uint256[] memory amountsOut = uniswapV2Router.swapExactTokensForTokens(
            amount,
            amountOutMin,
            path,
            receiver,
            block.timestamp + 60
        );

        amountOut = amountsOut[amountsOut.length - 1];
    }

    /**
     * @notice Perform a swap using Uniswap V3.
     * @param swapData bytes variable storing the following swap information
     *      address[] path: array of addresses dictating what swap path to follow
     *      uint24[] poolFees: array of pool fees dictating what swap pools to use
     *      uint256 amount: amount of the first asset in the path to swap
     *      uint256 amountOutMin: the minimum amount of the last asset in the path to receive
     * @param receiver address to send the received assets to
     * @return amountOut amount of assets received from the swap
     */
    function swapWithUniV3(
        bytes memory swapData,
        address receiver,
        ERC20 assetIn,
        ERC20 assetOut
    ) public returns (uint256 amountOut) {
        (address[] memory path, uint24[] memory poolFees, uint256 amount, uint256 amountOutMin) = abi.decode(
            swapData,
            (address[], uint24[], uint256, uint256)
        );

        // Check that path matches assetIn and assetOut.
        if (assetIn != ERC20(path[0])) revert SwapRouter__AssetInMisMatch(path[0], address(assetIn));
        if (assetOut != ERC20(path[path.length - 1]))
            revert SwapRouter__AssetOutMisMatch(path[path.length - 1], address(assetOut));

        // Transfer assets to this contract to swap.
        assetIn.safeTransferFrom(msg.sender, address(this), amount);

        // Approve assets to be swapped through the router.
        assetIn.safeApprove(address(uniswapV3Router), amount);

        // Encode swap parameters.
        bytes memory encodePackedPath = abi.encodePacked(address(assetIn));
        for (uint256 i = 1; i < path.length; i++)
            encodePackedPath = abi.encodePacked(encodePackedPath, poolFees[i - 1], path[i]);

        // Execute the swap.
        amountOut = uniswapV3Router.exactInput(
            IUniswapV3Router.ExactInputParams({
                path: encodePackedPath,
                recipient: receiver,
                deadline: block.timestamp + 60,
                amountIn: amount,
                amountOutMinimum: amountOutMin
            })
        );
    }
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity 0.8.16;

import { ERC20 } from "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import { SafeERC20 } from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import { Ownable } from "@openzeppelin/contracts/access/Ownable.sol";
import { FeedRegistryInterface } from "@chainlink/contracts/src/v0.8/interfaces/FeedRegistryInterface.sol";
import { AggregatorV2V3Interface } from "@chainlink/contracts/src/v0.8/interfaces/AggregatorV2V3Interface.sol";
import { IChainlinkAggregator } from "src/interfaces/external/IChainlinkAggregator.sol";
import { Denominations } from "@chainlink/contracts/src/v0.8/Denominations.sol";
import { SafeCast } from "@openzeppelin/contracts/utils/math/SafeCast.sol";
import { Math } from "src/utils/Math.sol";

/**
 * @title Sommelier Price Router
 * @notice Provides a universal interface allowing Sommelier contracts to retrieve secure pricing
 *         data from Chainlink.
 * @author crispymangoes, Brian Le
 */
contract PriceRouter is Ownable {
    using SafeERC20 for ERC20;
    using SafeCast for int256;
    using Math for uint256;

    event AddAsset(address indexed asset);

    // =========================================== ASSETS CONFIG ===========================================

    /**
     * @param minPrice minimum price in USD for the asset before reverting
     * @param maxPrice maximum price in USD for the asset before reverting
     * @param isPriceRangeInETH if true price range values are given in ETH, if false price range is given in USD
     * @param heartbeat maximum allowed time that can pass with no update before price data is considered stale
     * @param isSupported whether this asset is supported by the platform or not
     */
    struct AssetConfig {
        uint256 minPrice;
        uint256 maxPrice;
        bool isPriceRangeInETH;
        uint96 heartbeat;
        bool isSupported;
    }

    /**
     * @notice Get the asset data for a given asset.
     */
    mapping(ERC20 => AssetConfig) public getAssetConfig;

    uint96 public constant DEFAULT_HEART_BEAT = 1 days;

    // ======================================= ADAPTOR OPERATIONS =======================================

    /**
     * @notice Attempted to set a minimum price below the Chainlink minimum price (with buffer).
     * @param minPrice minimum price attempted to set
     * @param bufferedMinPrice minimum price that can be set including buffer
     */
    error PriceRouter__InvalidMinPrice(uint256 minPrice, uint256 bufferedMinPrice);

    /**
     * @notice Attempted to set a maximum price above the Chainlink maximum price (with buffer).
     * @param maxPrice maximum price attempted to set
     * @param bufferedMaxPrice maximum price that can be set including buffer
     */
    error PriceRouter__InvalidMaxPrice(uint256 maxPrice, uint256 bufferedMaxPrice);

    /**
     * @notice Attempted to add an invalid asset.
     * @param asset address of the invalid asset
     */
    error PriceRouter__InvalidAsset(address asset);

    /**
     * @notice Attempted to add an asset with a certain price range denomination, but actual denomination was different.
     * @param expected price range denomination
     * @param actual price range denomination
     * @dev If an asset has price feeds in USD and ETH, the feed in USD is favored
     */
    error PriceRouter__PriceRangeDenominationMisMatch(bool expected, bool actual);

    /**
     * @notice Attempted to add an asset with invalid min/max prices.
     * @param min price
     * @param max price
     */
    error PriceRouter__MinPriceGreaterThanMaxPrice(uint256 min, uint256 max);

    /**
     * @notice Add an asset for the price router to support.
     * @param asset address of asset to support on the platform
     * @param minPrice minimum price in USD with 8 decimals for the asset before reverting,
     *                 set to `0` to use Chainlink's default
     * @param maxPrice maximum price in USD with 8 decimals for the asset before reverting,
     *                 set to `0` to use Chainlink's default
     * @param heartbeat maximum amount of time that can pass without the price data being updated
     *                  before reverting, set to `0` to use the default of 1 day
     */
    function addAsset(
        ERC20 asset,
        uint256 minPrice,
        uint256 maxPrice,
        bool rangeInETH,
        uint96 heartbeat
    ) external onlyOwner {
        if (address(asset) == address(0)) revert PriceRouter__InvalidAsset(address(asset));

        // Use Chainlink to get the min and max of the asset.
        ERC20 assetToQuery = _remap(asset);
        (uint256 minFromChainklink, uint256 maxFromChainlink, bool isETH) = _getPriceRange(assetToQuery);

        // Check if callers expected price range  denomination matches actual.
        if (rangeInETH != isETH) revert PriceRouter__PriceRangeDenominationMisMatch(rangeInETH, isETH);

        // Add a ~10% buffer to minimum and maximum price from Chainlink because Chainlink can stop updating
        // its price before/above the min/max price.
        uint256 bufferedMinPrice = minFromChainklink.mulWadDown(1.1e18);
        uint256 bufferedMaxPrice = maxFromChainlink.mulWadDown(0.9e18);

        if (minPrice == 0) {
            minPrice = bufferedMinPrice;
        } else {
            if (minPrice < bufferedMinPrice) revert PriceRouter__InvalidMinPrice(minPrice, bufferedMinPrice);
        }

        if (maxPrice == 0) {
            maxPrice = bufferedMaxPrice;
        } else {
            if (maxPrice > bufferedMaxPrice) revert PriceRouter__InvalidMaxPrice(maxPrice, bufferedMaxPrice);
        }

        if (minPrice >= maxPrice) revert PriceRouter__MinPriceGreaterThanMaxPrice(minPrice, maxPrice);

        getAssetConfig[asset] = AssetConfig({
            minPrice: minPrice,
            maxPrice: maxPrice,
            isPriceRangeInETH: isETH,
            heartbeat: heartbeat != 0 ? heartbeat : DEFAULT_HEART_BEAT,
            isSupported: true
        });

        emit AddAsset(address(asset));
    }

    function isSupported(ERC20 asset) external view returns (bool) {
        return getAssetConfig[asset].isSupported;
    }

    // ======================================= PRICING OPERATIONS =======================================

    /**
     * @notice Get the value of an asset in terms of another asset.
     * @param baseAsset address of the asset to get the price of in terms of the quote asset
     * @param amount amount of the base asset to price
     * @param quoteAsset address of the asset that the base asset is priced in terms of
     * @return value value of the amount of base assets specified in terms of the quote asset
     */
    function getValue(
        ERC20 baseAsset,
        uint256 amount,
        ERC20 quoteAsset
    ) external view returns (uint256 value) {
        value = amount.mulDivDown(getExchangeRate(baseAsset, quoteAsset), 10**baseAsset.decimals());
    }

    /**
     * @notice Attempted an operation with arrays of unequal lengths that were expected to be equal length.
     */
    error PriceRouter__LengthMismatch();

    /**
     * @notice Get the total value of multiple assets in terms of another asset.
     * @param baseAssets addresses of the assets to get the price of in terms of the quote asset
     * @param amounts amounts of each base asset to price
     * @param quoteAsset address of the assets that the base asset is priced in terms of
     * @return value total value of the amounts of each base assets specified in terms of the quote asset
     */
    function getValues(
        ERC20[] memory baseAssets,
        uint256[] memory amounts,
        ERC20 quoteAsset
    ) external view returns (uint256 value) {
        uint256 numOfAssets = baseAssets.length;
        if (numOfAssets != amounts.length) revert PriceRouter__LengthMismatch();

        uint8 quoteAssetDecimals = quoteAsset.decimals();

        for (uint256 i; i < numOfAssets; i++) {
            ERC20 baseAsset = baseAssets[i];

            value += amounts[i].mulDivDown(
                _getExchangeRate(baseAsset, quoteAsset, quoteAssetDecimals),
                10**baseAsset.decimals()
            );
        }
    }

    /**
     * @notice Get the exchange rate between two assets.
     * @param baseAsset address of the asset to get the exchange rate of in terms of the quote asset
     * @param quoteAsset address of the asset that the base asset is exchanged for
     * @return exchangeRate rate of exchange between the base asset and the quote asset
     */
    function getExchangeRate(ERC20 baseAsset, ERC20 quoteAsset) public view returns (uint256 exchangeRate) {
        exchangeRate = _getExchangeRate(baseAsset, quoteAsset, quoteAsset.decimals());
    }

    /**
     * @notice Get the exchange rates between multiple assets and another asset.
     * @param baseAssets addresses of the assets to get the exchange rates of in terms of the quote asset
     * @param quoteAsset address of the asset that the base assets are exchanged for
     * @return exchangeRates rate of exchange between the base assets and the quote asset
     */
    function getExchangeRates(ERC20[] memory baseAssets, ERC20 quoteAsset)
        external
        view
        returns (uint256[] memory exchangeRates)
    {
        uint8 quoteAssetDecimals = quoteAsset.decimals();

        uint256 numOfAssets = baseAssets.length;
        exchangeRates = new uint256[](numOfAssets);
        for (uint256 i; i < numOfAssets; i++)
            exchangeRates[i] = _getExchangeRate(baseAssets[i], quoteAsset, quoteAssetDecimals);
    }

    /**
     * @notice Get the minimum and maximum valid price for an asset.
     * @param asset address of the asset to get the price range of
     * @return min minimum valid price for the asset
     * @return max maximum valid price for the asset
     */
    function getPriceRange(ERC20 asset)
        public
        view
        returns (
            uint256 min,
            uint256 max,
            bool isETH
        )
    {
        AssetConfig memory config = getAssetConfig[asset];

        if (!config.isSupported) revert PriceRouter__UnsupportedAsset(address(asset));

        (min, max, isETH) = (config.minPrice, config.maxPrice, config.isPriceRangeInETH);
    }

    /**
     * @notice Get the minimum and maximum valid prices for an asset.
     * @param _assets addresses of the assets to get the price ranges for
     * @return min minimum valid price for each asset
     * @return max maximum valid price for each asset
     */
    function getPriceRanges(ERC20[] memory _assets)
        external
        view
        returns (
            uint256[] memory min,
            uint256[] memory max,
            bool[] memory isETH
        )
    {
        uint256 numOfAssets = _assets.length;
        (min, max, isETH) = (new uint256[](numOfAssets), new uint256[](numOfAssets), new bool[](numOfAssets));
        for (uint256 i; i < numOfAssets; i++) (min[i], max[i], isETH[i]) = getPriceRange(_assets[i]);
    }

    // =========================================== HELPER FUNCTIONS ===========================================

    ERC20 private constant WETH = ERC20(0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2);
    ERC20 private constant WBTC = ERC20(0x2260FAC5E5542a773Aa44fBCfeDf7C193bc2C599);

    function _remap(ERC20 asset) internal pure returns (ERC20) {
        if (asset == WETH) return ERC20(Denominations.ETH);
        if (asset == WBTC) return ERC20(Denominations.BTC);
        return asset;
    }

    /**
     * @notice Gets the exchange rate between a base and a quote asset
     * @param baseAsset the asset to convert into quoteAsset
     * @param quoteAsset the asset base asset is converted into
     * @return exchangeRate value of base asset in terms of quote asset
     */
    function _getExchangeRate(
        ERC20 baseAsset,
        ERC20 quoteAsset,
        uint8 quoteAssetDecimals
    ) internal view returns (uint256 exchangeRate) {
        exchangeRate = getValueInUSD(baseAsset).mulDivDown(10**quoteAssetDecimals, getValueInUSD(quoteAsset));
    }

    /**
     * @notice Attempted to update the asset to one that is not supported by the platform.
     * @param asset address of the unsupported asset
     */
    error PriceRouter__UnsupportedAsset(address asset);

    /**
     * @notice Attempted an operation to price an asset that under its minimum valid price.
     * @param asset address of the asset that is under its minimum valid price
     * @param price price of the asset
     * @param minPrice minimum valid price of the asset
     */
    error PriceRouter__AssetBelowMinPrice(address asset, uint256 price, uint256 minPrice);

    /**
     * @notice Attempted an operation to price an asset that under its maximum valid price.
     * @param asset address of the asset that is under its maximum valid price
     * @param price price of the asset
     * @param maxPrice maximum valid price of the asset
     */
    error PriceRouter__AssetAboveMaxPrice(address asset, uint256 price, uint256 maxPrice);

    /**
     * @notice Attempted to fetch a price for an asset that has not been updated in too long.
     * @param asset address of the asset thats price is stale
     * @param timeSinceLastUpdate seconds since the last price update
     * @param heartbeat maximum allowed time between price updates
     */
    error PriceRouter__StalePrice(address asset, uint256 timeSinceLastUpdate, uint256 heartbeat);

    // =========================================== CHAINLINK PRICING FUNCTIONS ===========================================\
    /**
     * @notice Feed Registry contract used to get chainlink data feeds, use getFeed!!
     */
    FeedRegistryInterface public constant feedRegistry =
        FeedRegistryInterface(0x47Fb2585D2C56Fe188D0E6ec628a38b74fCeeeDf);

    /**
     * @notice Could not find an asset's price in USD or ETH.
     * @param asset address of the asset
     */
    error PriceRouter__PriceNotAvailable(address asset);

    /**
     * @notice Interacts with Chainlink feed registry and first tries to get `asset` price in USD,
     *         if that fails, then it tries to get `asset` price in ETH, and then converts the answer into USD.
     * @param asset the ERC20 token to get the price of.
     * @return price the price of `asset` in USD
     */
    function getValueInUSD(ERC20 asset) public view returns (uint256 price) {
        AssetConfig memory config = getAssetConfig[asset];

        // Make sure asset is supported.
        if (!config.isSupported) revert PriceRouter__UnsupportedAsset(address(asset));

        // Remap asset if need be.
        asset = _remap(asset);

        if (!config.isPriceRangeInETH) {
            // Price feed is in USD.
            (, int256 _price, , uint256 _timestamp, ) = feedRegistry.latestRoundData(address(asset), Denominations.USD);
            price = _price.toUint256();
            _checkPriceFeed(asset, price, _timestamp, config);
        } else {
            // Price feed is in ETH.
            (, int256 _price, , uint256 _timestamp, ) = feedRegistry.latestRoundData(address(asset), Denominations.ETH);
            price = _price.toUint256();
            _checkPriceFeed(asset, price, _timestamp, config);

            // Convert price from ETH to USD.
            price = _price.toUint256().mulWadDown(_getExchangeRateFromETHToUSD());
        }
    }

    /**
     * @notice Could not find an asset's price range in USD or ETH.
     * @param asset address of the asset
     */
    error PriceRouter__PriceRangeNotAvailable(address asset);

    /**
     * @notice Interacts with Chainlink feed registry and first tries to get `asset` price range in USD,
     *         if that fails, then it tries to get `asset` price range in ETH, and then converts the range into USD.
     * @param asset the ERC20 token to get the price range of.
     * @return min the minimum price where Chainlink nodes stop updating the oracle
     * @return max the maximum price where Chainlink nodes stop updating the oracle
     */
    function _getPriceRange(ERC20 asset)
        internal
        view
        returns (
            uint256 min,
            uint256 max,
            bool isETH
        )
    {
        try feedRegistry.getFeed(address(asset), Denominations.USD) returns (AggregatorV2V3Interface aggregator) {
            IChainlinkAggregator chainlinkAggregator = IChainlinkAggregator(address(aggregator));

            min = uint256(uint192(chainlinkAggregator.minAnswer()));
            max = uint256(uint192(chainlinkAggregator.maxAnswer()));
            isETH = false;
        } catch {
            // If we can't find the USD price, then try the ETH price.
            try feedRegistry.getFeed(address(asset), Denominations.ETH) returns (AggregatorV2V3Interface aggregator) {
                IChainlinkAggregator chainlinkAggregator = IChainlinkAggregator(address(aggregator));

                min = uint256(uint192(chainlinkAggregator.minAnswer()));
                max = uint256(uint192(chainlinkAggregator.maxAnswer()));
                isETH = true;
            } catch {
                revert PriceRouter__PriceRangeNotAvailable(address(asset));
            }
        }
    }

    /**
     * @notice helper function to grab pricing data for ETH in USD
     * @return exchangeRate the exchange rate for ETH in terms of USD
     * @dev It is inefficient to re-calculate _checkPriceFeed for ETH -> USD multiple times for a single TX,
     * but this is done in the explicit way because it is simpler and less prone to logic errors.
     */
    function _getExchangeRateFromETHToUSD() internal view returns (uint256 exchangeRate) {
        (, int256 _price, , uint256 _timestamp, ) = feedRegistry.latestRoundData(Denominations.ETH, Denominations.USD);
        exchangeRate = _price.toUint256();
        _checkPriceFeed(WETH, exchangeRate, _timestamp, getAssetConfig[WETH]);
    }

    /**
     * @notice helper function to validate a price feed is safe to use.
     * @param asset ERC20 asset price feed data is for.
     * @param value the price value the price feed gave.
     * @param timestamp the last timestamp the price feed was updated.
     * @param config the assets config storing min price, max price, and heartbeat requirements.
     */
    function _checkPriceFeed(
        ERC20 asset,
        uint256 value,
        uint256 timestamp,
        AssetConfig memory config
    ) internal view {
        uint256 minPrice = config.minPrice;
        if (value < minPrice) revert PriceRouter__AssetBelowMinPrice(address(asset), value, minPrice);

        uint256 maxPrice = config.maxPrice;
        if (value > maxPrice) revert PriceRouter__AssetAboveMaxPrice(address(asset), value, maxPrice);

        uint256 heartbeat = config.heartbeat;
        uint256 timeSinceLastUpdate = block.timestamp - timestamp;
        if (timeSinceLastUpdate > heartbeat)
            revert PriceRouter__StalePrice(address(asset), timeSinceLastUpdate, heartbeat);
    }
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity 0.8.16;

interface IGravity {
    function sendToCosmos(
        address _tokenContract,
        bytes32 _destination,
        uint256 _amount
    ) external;
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity 0.8.16;

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

/**
 * @notice A library to extend the address array data type.
 */
library AddressArray {
    // =========================================== ADDRESS STORAGE ===========================================

    /**
     * @notice Add an address to the array at a given index.
     * @param array address array to add the address to
     * @param index index to add the address at
     * @param value address to add to the array
     */
    function add(
        address[] storage array,
        uint256 index,
        address value
    ) internal {
        uint256 len = array.length;

        if (len > 0) {
            array.push(array[len - 1]);

            for (uint256 i = len - 1; i > index; i--) array[i] = array[i - 1];

            array[index] = value;
        } else {
            array.push(value);
        }
    }

    /**
     * @notice Remove an address from the array at a given index.
     * @param array address array to remove the address from
     * @param index index to remove the address at
     */
    function remove(address[] storage array, uint256 index) internal {
        uint256 len = array.length;

        require(index < len, "Index out of bounds");

        for (uint256 i = index; i < len - 1; i++) array[i] = array[i + 1];

        array.pop();
    }

    /**
     * @notice Remove the first occurrence of a value in an array.
     * @param array address array to remove the address from
     * @param value address to remove from the array
     */
    function remove(address[] storage array, address value) internal {
        uint256 len = array.length;

        for (uint256 i; i < len; i++)
            if (array[i] == value) {
                for (i; i < len - 1; i++) array[i] = array[i + 1];

                array.pop();

                return;
            }

        revert("Value not found");
    }

    /**
     * @notice Check whether an array contains an address.
     * @param array address array to check
     * @param value address to check for
     */
    function contains(address[] storage array, address value) internal view returns (bool) {
        for (uint256 i; i < array.length; i++) if (value == array[i]) return true;

        return false;
    }
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity 0.8.16;

library Math {
    /**
     * @notice Substract with a floor of 0 for the result.
     */
    function subMinZero(uint256 x, uint256 y) internal pure returns (uint256) {
        return x > y ? x - y : 0;
    }

    /**
     * @notice Used to change the decimals of precision used for an amount.
     */
    function changeDecimals(
        uint256 amount,
        uint8 fromDecimals,
        uint8 toDecimals
    ) internal pure returns (uint256) {
        if (fromDecimals == toDecimals) {
            return amount;
        } else if (fromDecimals < toDecimals) {
            return amount * 10**(toDecimals - fromDecimals);
        } else {
            return amount / 10**(fromDecimals - toDecimals);
        }
    }

    // ===================================== OPENZEPPELIN'S MATH =====================================

    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        return a < b ? a : b;
    }

    // ================================= SOLMATE's FIXEDPOINTMATHLIB =================================

    uint256 public constant WAD = 1e18; // The scalar of ETH and most ERC20s.

    function mulWadDown(uint256 x, uint256 y) internal pure returns (uint256) {
        return mulDivDown(x, y, WAD); // Equivalent to (x * y) / WAD rounded down.
    }

    function mulDivDown(
        uint256 x,
        uint256 y,
        uint256 denominator
    ) internal pure returns (uint256 z) {
        assembly {
            // Store x * y in z for now.
            z := mul(x, y)

            // Equivalent to require(denominator != 0 && (x == 0 || (x * y) / x == y))
            if iszero(and(iszero(iszero(denominator)), or(iszero(x), eq(div(z, x), y)))) {
                revert(0, 0)
            }

            // Divide z by the denominator.
            z := div(z, denominator)
        }
    }

    function mulDivUp(
        uint256 x,
        uint256 y,
        uint256 denominator
    ) internal pure returns (uint256 z) {
        assembly {
            // Store x * y in z for now.
            z := mul(x, y)

            // Equivalent to require(denominator != 0 && (x == 0 || (x * y) / x == y))
            if iszero(and(iszero(iszero(denominator)), or(iszero(x), eq(div(z, x), y)))) {
                revert(0, 0)
            }

            // First, divide z - 1 by the denominator and add 1.
            // We allow z - 1 to underflow if z is 0, because we multiply the
            // end result by 0 if z is zero, ensuring we return 0 if z is zero.
            z := mul(iszero(iszero(z)), add(div(sub(z, 1), denominator), 1))
        }
    }
}

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.8.0;

/// @notice Simple single owner authorization mixin.
/// @author Solmate (https://github.com/Rari-Capital/solmate/blob/main/src/auth/Owned.sol)
abstract contract Owned {
    /*//////////////////////////////////////////////////////////////
                                 EVENTS
    //////////////////////////////////////////////////////////////*/

    event OwnerUpdated(address indexed user, address indexed newOwner);

    /*//////////////////////////////////////////////////////////////
                            OWNERSHIP STORAGE
    //////////////////////////////////////////////////////////////*/

    address public owner;

    modifier onlyOwner() virtual {
        require(msg.sender == owner, "UNAUTHORIZED");

        _;
    }

    /*//////////////////////////////////////////////////////////////
                               CONSTRUCTOR
    //////////////////////////////////////////////////////////////*/

    constructor(address _owner) {
        owner = _owner;

        emit OwnerUpdated(address(0), _owner);
    }

    /*//////////////////////////////////////////////////////////////
                             OWNERSHIP LOGIC
    //////////////////////////////////////////////////////////////*/

    function setOwner(address newOwner) public virtual onlyOwner {
        owner = newOwner;

        emit OwnerUpdated(msg.sender, newOwner);
    }
}

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.8.0;

/// @notice Gas optimized reentrancy protection for smart contracts.
/// @author Solmate (https://github.com/Rari-Capital/solmate/blob/main/src/utils/ReentrancyGuard.sol)
/// @author Modified from OpenZeppelin (https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/security/ReentrancyGuard.sol)
abstract contract ReentrancyGuard {
    uint256 private locked = 1;

    modifier nonReentrant() virtual {
        require(locked == 1, "REENTRANCY");

        locked = 2;

        _;

        locked = 1;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/extensions/draft-ERC20Permit.sol)

pragma solidity ^0.8.0;

import "./draft-IERC20Permit.sol";
import "../ERC20.sol";
import "../../../utils/cryptography/draft-EIP712.sol";
import "../../../utils/cryptography/ECDSA.sol";
import "../../../utils/Counters.sol";

/**
 * @dev Implementation of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
 * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
 *
 * Adds the {permit} method, which can be used to change an account's ERC20 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.
 *
 * _Available since v3.4._
 */
abstract contract ERC20Permit is ERC20, IERC20Permit, EIP712 {
    using Counters for Counters.Counter;

    mapping(address => Counters.Counter) private _nonces;

    // solhint-disable-next-line var-name-mixedcase
    bytes32 private constant _PERMIT_TYPEHASH =
        keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)");
    /**
     * @dev In previous versions `_PERMIT_TYPEHASH` was declared as `immutable`.
     * However, to ensure consistency with the upgradeable transpiler, we will continue
     * to reserve a slot.
     * @custom:oz-renamed-from _PERMIT_TYPEHASH
     */
    // solhint-disable-next-line var-name-mixedcase
    bytes32 private _PERMIT_TYPEHASH_DEPRECATED_SLOT;

    /**
     * @dev Initializes the {EIP712} domain separator using the `name` parameter, and setting `version` to `"1"`.
     *
     * It's a good idea to use the same `name` that is defined as the ERC20 token name.
     */
    constructor(string memory name) EIP712(name, "1") {}

    /**
     * @dev See {IERC20Permit-permit}.
     */
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) public virtual override {
        require(block.timestamp <= deadline, "ERC20Permit: expired deadline");

        bytes32 structHash = keccak256(abi.encode(_PERMIT_TYPEHASH, owner, spender, value, _useNonce(owner), deadline));

        bytes32 hash = _hashTypedDataV4(structHash);

        address signer = ECDSA.recover(hash, v, r, s);
        require(signer == owner, "ERC20Permit: invalid signature");

        _approve(owner, spender, value);
    }

    /**
     * @dev See {IERC20Permit-nonces}.
     */
    function nonces(address owner) public view virtual override returns (uint256) {
        return _nonces[owner].current();
    }

    /**
     * @dev See {IERC20Permit-DOMAIN_SEPARATOR}.
     */
    // solhint-disable-next-line func-name-mixedcase
    function DOMAIN_SEPARATOR() external view override returns (bytes32) {
        return _domainSeparatorV4();
    }

    /**
     * @dev "Consume a nonce": return the current value and increment.
     *
     * _Available since v4.1._
     */
    function _useNonce(address owner) internal virtual returns (uint256 current) {
        Counters.Counter storage nonce = _nonces[owner];
        current = nonce.current();
        nonce.increment();
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";
import "../../../utils/Address.sol";

/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
    using Address for address;

    function safeTransfer(
        IERC20 token,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

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

    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IERC20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        require(
            (value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
    }

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

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

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

        bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
        if (returndata.length > 0) {
            // Return data is optional
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

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

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

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

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";

/**
 * @dev Interface for the optional metadata functions from the ERC20 standard.
 *
 * _Available since v4.1._
 */
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 v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

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

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

// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.8.0;

import { IMulticall } from "src/interfaces/IMulticall.sol";

/**
 * @title Multicall
 * @notice Enables calling multiple methods in a single call to the contract
 * From: https://github.com/Uniswap/v3-periphery/contracts/base/Multicall.sol
 */
abstract contract Multicall is IMulticall {
    /// @inheritdoc IMulticall
    function multicall(bytes[] calldata data) public payable override returns (bytes[] memory results) {
        results = new bytes[](data.length);
        for (uint256 i = 0; i < data.length; i++) {
            (bool success, bytes memory result) = address(this).delegatecall(data[i]);

            if (!success) {
                // Next 5 lines from https://ethereum.stackexchange.com/a/83577
                // solhint-disable-next-line reason-string
                if (result.length < 68) revert();
                assembly {
                    result := add(result, 0x04)
                }
                revert(abi.decode(result, (string)));
            }

            results[i] = result;
        }
    }
}

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

interface IUniswapV2Router01 {
    function factory() external pure returns (address);

    function WETH() external pure returns (address);

    function addLiquidity(
        address tokenA,
        address tokenB,
        uint256 amountADesired,
        uint256 amountBDesired,
        uint256 amountAMin,
        uint256 amountBMin,
        address to,
        uint256 deadline
    )
        external
        returns (
            uint256 amountA,
            uint256 amountB,
            uint256 liquidity
        );

    function addLiquidityETH(
        address token,
        uint256 amountTokenDesired,
        uint256 amountTokenMin,
        uint256 amountETHMin,
        address to,
        uint256 deadline
    )
        external
        payable
        returns (
            uint256 amountToken,
            uint256 amountETH,
            uint256 liquidity
        );

    function removeLiquidity(
        address tokenA,
        address tokenB,
        uint256 liquidity,
        uint256 amountAMin,
        uint256 amountBMin,
        address to,
        uint256 deadline
    ) external returns (uint256 amountA, uint256 amountB);

    function removeLiquidityETH(
        address token,
        uint256 liquidity,
        uint256 amountTokenMin,
        uint256 amountETHMin,
        address to,
        uint256 deadline
    ) external returns (uint256 amountToken, uint256 amountETH);

    function removeLiquidityWithPermit(
        address tokenA,
        address tokenB,
        uint256 liquidity,
        uint256 amountAMin,
        uint256 amountBMin,
        address to,
        uint256 deadline,
        bool approveMax,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external returns (uint256 amountA, uint256 amountB);

    function removeLiquidityETHWithPermit(
        address token,
        uint256 liquidity,
        uint256 amountTokenMin,
        uint256 amountETHMin,
        address to,
        uint256 deadline,
        bool approveMax,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external returns (uint256 amountToken, uint256 amountETH);

    function swapExactTokensForTokens(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external returns (uint256[] memory amounts);

    function swapTokensForExactTokens(
        uint256 amountOut,
        uint256 amountInMax,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external returns (uint256[] memory amounts);

    function swapExactETHForTokens(
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external payable returns (uint256[] memory amounts);

    function swapTokensForExactETH(
        uint256 amountOut,
        uint256 amountInMax,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external returns (uint256[] memory amounts);

    function swapExactTokensForETH(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external returns (uint256[] memory amounts);

    function swapETHForExactTokens(
        uint256 amountOut,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external payable returns (uint256[] memory amounts);

    function quote(
        uint256 amountA,
        uint256 reserveA,
        uint256 reserveB
    ) external pure returns (uint256 amountB);

    function getAmountOut(
        uint256 amountIn,
        uint256 reserveIn,
        uint256 reserveOut
    ) external pure returns (uint256 amountOut);

    function getAmountIn(
        uint256 amountOut,
        uint256 reserveIn,
        uint256 reserveOut
    ) external pure returns (uint256 amountIn);

    function getAmountsOut(uint256 amountIn, address[] calldata path) external view returns (uint256[] memory amounts);

    function getAmountsIn(uint256 amountOut, address[] calldata path) external view returns (uint256[] memory amounts);
}

interface IUniswapV2Router02 is IUniswapV2Router01 {
    function removeLiquidityETHSupportingFeeOnTransferTokens(
        address token,
        uint256 liquidity,
        uint256 amountTokenMin,
        uint256 amountETHMin,
        address to,
        uint256 deadline
    ) external returns (uint256 amountETH);

    function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
        address token,
        uint256 liquidity,
        uint256 amountTokenMin,
        uint256 amountETHMin,
        address to,
        uint256 deadline,
        bool approveMax,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external returns (uint256 amountETH);

    function swapExactTokensForTokensSupportingFeeOnTransferTokens(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external;

    function swapExactETHForTokensSupportingFeeOnTransferTokens(
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external payable;

    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external;
}

// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.8.0;

/// @title Callback for IUniswapV3PoolActions#swap
/// @notice Any contract that calls IUniswapV3PoolActions#swap must implement this interface
interface IUniswapV3SwapCallback {
    /// @notice Called to `msg.sender` after executing a swap via IUniswapV3Pool#swap.
    /// @dev In the implementation you must pay the pool tokens owed for the swap.
    /// The caller of this method must be checked to be a UniswapV3Pool deployed by the canonical UniswapV3Factory.
    /// amount0Delta and amount1Delta can both be 0 if no tokens were swapped.
    /// @param amount0Delta The amount of token0 that was sent (negative) or must be received (positive) by the pool by
    /// the end of the swap. If positive, the callback must send that amount of token0 to the pool.
    /// @param amount1Delta The amount of token1 that was sent (negative) or must be received (positive) by the pool by
    /// the end of the swap. If positive, the callback must send that amount of token1 to the pool.
    /// @param data Any data passed through by the caller via the IUniswapV3PoolActions#swap call
    function uniswapV3SwapCallback(
        int256 amount0Delta,
        int256 amount1Delta,
        bytes calldata data
    ) external;
}

/// @title Router token swapping functionality
/// @notice Functions for swapping tokens via Uniswap V3
interface IUniswapV3Router is IUniswapV3SwapCallback {
    struct ExactInputSingleParams {
        address tokenIn;
        address tokenOut;
        uint24 fee;
        address recipient;
        uint256 deadline;
        uint256 amountIn;
        uint256 amountOutMinimum;
        uint160 sqrtPriceLimitX96;
    }

    /// @notice Swaps `amountIn` of one token for as much as possible of another token
    /// @param params The parameters necessary for the swap, encoded as `ExactInputSingleParams` in calldata
    /// @return amountOut The amount of the received token
    function exactInputSingle(ExactInputSingleParams calldata params) external payable returns (uint256 amountOut);

    struct ExactInputParams {
        bytes path;
        address recipient;
        uint256 deadline;
        uint256 amountIn;
        uint256 amountOutMinimum;
    }

    /// @notice Swaps `amountIn` of one token for as much as possible of another along the specified path
    /// @param params The parameters necessary for the multi-hop swap, encoded as `ExactInputParams` in calldata
    /// @return amountOut The amount of the received token
    function exactInput(ExactInputParams calldata params) external payable returns (uint256 amountOut);

    struct ExactOutputSingleParams {
        address tokenIn;
        address tokenOut;
        uint24 fee;
        address recipient;
        uint256 deadline;
        uint256 amountOut;
        uint256 amountInMaximum;
        uint160 sqrtPriceLimitX96;
    }

    /// @notice Swaps as little as possible of one token for `amountOut` of another token
    /// @param params The parameters necessary for the swap, encoded as `ExactOutputSingleParams` in calldata
    /// @return amountIn The amount of the input token
    function exactOutputSingle(ExactOutputSingleParams calldata params) external payable returns (uint256 amountIn);

    struct ExactOutputParams {
        bytes path;
        address recipient;
        uint256 deadline;
        uint256 amountOut;
        uint256 amountInMaximum;
    }

    /// @notice Swaps as little as possible of one token for `amountOut` of another along the specified path (reversed)
    /// @param params The parameters necessary for the multi-hop swap, encoded as `ExactOutputParams` in calldata
    /// @return amountIn The amount of the input token
    function exactOutput(ExactOutputParams calldata params) external payable returns (uint256 amountIn);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
pragma abicoder v2;

import "./AggregatorV2V3Interface.sol";

interface FeedRegistryInterface {
  struct Phase {
    uint16 phaseId;
    uint80 startingAggregatorRoundId;
    uint80 endingAggregatorRoundId;
  }

  event FeedProposed(
    address indexed asset,
    address indexed denomination,
    address indexed proposedAggregator,
    address currentAggregator,
    address sender
  );
  event FeedConfirmed(
    address indexed asset,
    address indexed denomination,
    address indexed latestAggregator,
    address previousAggregator,
    uint16 nextPhaseId,
    address sender
  );

  // V3 AggregatorV3Interface

  function decimals(address base, address quote) external view returns (uint8);

  function description(address base, address quote) external view returns (string memory);

  function version(address base, address quote) external view returns (uint256);

  function latestRoundData(address base, address quote)
    external
    view
    returns (
      uint80 roundId,
      int256 answer,
      uint256 startedAt,
      uint256 updatedAt,
      uint80 answeredInRound
    );

  function getRoundData(
    address base,
    address quote,
    uint80 _roundId
  )
    external
    view
    returns (
      uint80 roundId,
      int256 answer,
      uint256 startedAt,
      uint256 updatedAt,
      uint80 answeredInRound
    );

  // V2 AggregatorInterface

  function latestAnswer(address base, address quote) external view returns (int256 answer);

  function latestTimestamp(address base, address quote) external view returns (uint256 timestamp);

  function latestRound(address base, address quote) external view returns (uint256 roundId);

  function getAnswer(
    address base,
    address quote,
    uint256 roundId
  ) external view returns (int256 answer);

  function getTimestamp(
    address base,
    address quote,
    uint256 roundId
  ) external view returns (uint256 timestamp);

  // Registry getters

  function getFeed(address base, address quote) external view returns (AggregatorV2V3Interface aggregator);

  function getPhaseFeed(
    address base,
    address quote,
    uint16 phaseId
  ) external view returns (AggregatorV2V3Interface aggregator);

  function isFeedEnabled(address aggregator) external view returns (bool);

  function getPhase(
    address base,
    address quote,
    uint16 phaseId
  ) external view returns (Phase memory phase);

  // Round helpers

  function getRoundFeed(
    address base,
    address quote,
    uint80 roundId
  ) external view returns (AggregatorV2V3Interface aggregator);

  function getPhaseRange(
    address base,
    address quote,
    uint16 phaseId
  ) external view returns (uint80 startingRoundId, uint80 endingRoundId);

  function getPreviousRoundId(
    address base,
    address quote,
    uint80 roundId
  ) external view returns (uint80 previousRoundId);

  function getNextRoundId(
    address base,
    address quote,
    uint80 roundId
  ) external view returns (uint80 nextRoundId);

  // Feed management

  function proposeFeed(
    address base,
    address quote,
    address aggregator
  ) external;

  function confirmFeed(
    address base,
    address quote,
    address aggregator
  ) external;

  // Proposed aggregator

  function getProposedFeed(address base, address quote)
    external
    view
    returns (AggregatorV2V3Interface proposedAggregator);

  function proposedGetRoundData(
    address base,
    address quote,
    uint80 roundId
  )
    external
    view
    returns (
      uint80 id,
      int256 answer,
      uint256 startedAt,
      uint256 updatedAt,
      uint80 answeredInRound
    );

  function proposedLatestRoundData(address base, address quote)
    external
    view
    returns (
      uint80 id,
      int256 answer,
      uint256 startedAt,
      uint256 updatedAt,
      uint80 answeredInRound
    );

  // Phases
  function getCurrentPhaseId(address base, address quote) external view returns (uint16 currentPhaseId);
}

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

import "./AggregatorInterface.sol";
import "./AggregatorV3Interface.sol";

interface AggregatorV2V3Interface is AggregatorInterface, AggregatorV3Interface {}

// SPDX-License-Identifier: Apache-2.0
pragma solidity 0.8.16;

import "@chainlink/contracts/src/v0.8/interfaces/AggregatorV2V3Interface.sol";

interface IChainlinkAggregator is AggregatorV2V3Interface {
    function maxAnswer() external view returns (int192);

    function minAnswer() external view returns (int192);
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

library Denominations {
  address public constant ETH = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;
  address public constant BTC = 0xbBbBBBBbbBBBbbbBbbBbbbbBBbBbbbbBbBbbBBbB;

  // Fiat currencies follow https://en.wikipedia.org/wiki/ISO_4217
  address public constant USD = address(840);
  address public constant GBP = address(826);
  address public constant EUR = address(978);
  address public constant JPY = address(392);
  address public constant KRW = address(410);
  address public constant CNY = address(156);
  address public constant AUD = address(36);
  address public constant CAD = address(124);
  address public constant CHF = address(756);
  address public constant ARS = address(32);
  address public constant PHP = address(608);
  address public constant NZD = address(554);
  address public constant SGD = address(702);
  address public constant NGN = address(566);
  address public constant ZAR = address(710);
  address public constant RUB = address(643);
  address public constant INR = address(356);
  address public constant BRL = address(986);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/draft-IERC20Permit.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
 * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
 *
 * Adds the {permit} method, which can be used to change an account's ERC20 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.
 */
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].
     */
    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
// OpenZeppelin Contracts v4.4.1 (utils/cryptography/draft-EIP712.sol)

pragma solidity ^0.8.0;

import "./ECDSA.sol";

/**
 * @dev https://eips.ethereum.org/EIPS/eip-712[EIP 712] is a standard for hashing and signing of typed structured data.
 *
 * The encoding specified in the EIP is very generic, and such a generic implementation in Solidity is not feasible,
 * thus this contract does not implement the encoding itself. Protocols need to implement the type-specific encoding
 * they need in their contracts using a combination of `abi.encode` and `keccak256`.
 *
 * This contract implements the EIP 712 domain separator ({_domainSeparatorV4}) that is used as part of the encoding
 * scheme, and the final step of the encoding to obtain the message digest that is then signed via ECDSA
 * ({_hashTypedDataV4}).
 *
 * The implementation of the domain separator was designed to be as efficient as possible while still properly updating
 * the chain id to protect against replay attacks on an eventual fork of the chain.
 *
 * NOTE: This contract implements the version of the encoding known as "v4", as implemented by the JSON RPC method
 * https://docs.metamask.io/guide/signing-data.html[`eth_signTypedDataV4` in MetaMask].
 *
 * _Available since v3.4._
 */
abstract contract EIP712 {
    /* solhint-disable var-name-mixedcase */
    // Cache the domain separator as an immutable value, but also store the chain id that it corresponds to, in order to
    // invalidate the cached domain separator if the chain id changes.
    bytes32 private immutable _CACHED_DOMAIN_SEPARATOR;
    uint256 private immutable _CACHED_CHAIN_ID;
    address private immutable _CACHED_THIS;

    bytes32 private immutable _HASHED_NAME;
    bytes32 private immutable _HASHED_VERSION;
    bytes32 private immutable _TYPE_HASH;

    /* solhint-enable var-name-mixedcase */

    /**
     * @dev Initializes the domain separator and parameter caches.
     *
     * The meaning of `name` and `version` is specified in
     * https://eips.ethereum.org/EIPS/eip-712#definition-of-domainseparator[EIP 712]:
     *
     * - `name`: the user readable name of the signing domain, i.e. the name of the DApp or the protocol.
     * - `version`: the current major version of the signing domain.
     *
     * NOTE: These parameters cannot be changed except through a xref:learn::upgrading-smart-contracts.adoc[smart
     * contract upgrade].
     */
    constructor(string memory name, string memory version) {
        bytes32 hashedName = keccak256(bytes(name));
        bytes32 hashedVersion = keccak256(bytes(version));
        bytes32 typeHash = keccak256(
            "EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"
        );
        _HASHED_NAME = hashedName;
        _HASHED_VERSION = hashedVersion;
        _CACHED_CHAIN_ID = block.chainid;
        _CACHED_DOMAIN_SEPARATOR = _buildDomainSeparator(typeHash, hashedName, hashedVersion);
        _CACHED_THIS = address(this);
        _TYPE_HASH = typeHash;
    }

    /**
     * @dev Returns the domain separator for the current chain.
     */
    function _domainSeparatorV4() internal view returns (bytes32) {
        if (address(this) == _CACHED_THIS && block.chainid == _CACHED_CHAIN_ID) {
            return _CACHED_DOMAIN_SEPARATOR;
        } else {
            return _buildDomainSeparator(_TYPE_HASH, _HASHED_NAME, _HASHED_VERSION);
        }
    }

    function _buildDomainSeparator(
        bytes32 typeHash,
        bytes32 nameHash,
        bytes32 versionHash
    ) private view returns (bytes32) {
        return keccak256(abi.encode(typeHash, nameHash, versionHash, block.chainid, address(this)));
    }

    /**
     * @dev Given an already https://eips.ethereum.org/EIPS/eip-712#definition-of-hashstruct[hashed struct], this
     * function returns the hash of the fully encoded EIP712 message for this domain.
     *
     * This hash can be used together with {ECDSA-recover} to obtain the signer of a message. For example:
     *
     * ```solidity
     * bytes32 digest = _hashTypedDataV4(keccak256(abi.encode(
     *     keccak256("Mail(address to,string contents)"),
     *     mailTo,
     *     keccak256(bytes(mailContents))
     * )));
     * address signer = ECDSA.recover(digest, signature);
     * ```
     */
    function _hashTypedDataV4(bytes32 structHash) internal view virtual returns (bytes32) {
        return ECDSA.toTypedDataHash(_domainSeparatorV4(), structHash);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/cryptography/ECDSA.sol)

pragma solidity ^0.8.0;

import "../Strings.sol";

/**
 * @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
 *
 * These functions can be used to verify that a message was signed by the holder
 * of the private keys of a given address.
 */
library ECDSA {
    enum RecoverError {
        NoError,
        InvalidSignature,
        InvalidSignatureLength,
        InvalidSignatureS,
        InvalidSignatureV
    }

    function _throwError(RecoverError error) private pure {
        if (error == RecoverError.NoError) {
            return; // no error: do nothing
        } else if (error == RecoverError.InvalidSignature) {
            revert("ECDSA: invalid signature");
        } else if (error == RecoverError.InvalidSignatureLength) {
            revert("ECDSA: invalid signature length");
        } else if (error == RecoverError.InvalidSignatureS) {
            revert("ECDSA: invalid signature 's' value");
        } else if (error == RecoverError.InvalidSignatureV) {
            revert("ECDSA: invalid signature 'v' value");
        }
    }

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature` or error string. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
     * this function rejects them by requiring the `s` value to be in the lower
     * half order, and the `v` value to be either 27 or 28.
     *
     * IMPORTANT: `hash` _must_ be the result of a hash operation for the
     * verification to be secure: it is possible to craft signatures that
     * recover to arbitrary addresses for non-hashed data. A safe way to ensure
     * this is by receiving a hash of the original message (which may otherwise
     * be too long), and then calling {toEthSignedMessageHash} on it.
     *
     * Documentation for signature generation:
     * - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]
     * - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]
     *
     * _Available since v4.3._
     */
    function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) {
        // Check the signature length
        // - case 65: r,s,v signature (standard)
        // - case 64: r,vs signature (cf https://eips.ethereum.org/EIPS/eip-2098) _Available since v4.1._
        if (signature.length == 65) {
            bytes32 r;
            bytes32 s;
            uint8 v;
            // ecrecover takes the signature parameters, and the only way to get them
            // currently is to use assembly.
            /// @solidity memory-safe-assembly
            assembly {
                r := mload(add(signature, 0x20))
                s := mload(add(signature, 0x40))
                v := byte(0, mload(add(signature, 0x60)))
            }
            return tryRecover(hash, v, r, s);
        } else if (signature.length == 64) {
            bytes32 r;
            bytes32 vs;
            // ecrecover takes the signature parameters, and the only way to get them
            // currently is to use assembly.
            /// @solidity memory-safe-assembly
            assembly {
                r := mload(add(signature, 0x20))
                vs := mload(add(signature, 0x40))
            }
            return tryRecover(hash, r, vs);
        } else {
            return (address(0), RecoverError.InvalidSignatureLength);
        }
    }

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature`. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
     * this function rejects them by requiring the `s` value to be in the lower
     * half order, and the `v` value to be either 27 or 28.
     *
     * IMPORTANT: `hash` _must_ be the result of a hash operation for the
     * verification to be secure: it is possible to craft signatures that
     * recover to arbitrary addresses for non-hashed data. A safe way to ensure
     * this is by receiving a hash of the original message (which may otherwise
     * be too long), and then calling {toEthSignedMessageHash} on it.
     */
    function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, signature);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.
     *
     * See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]
     *
     * _Available since v4.3._
     */
    function tryRecover(
        bytes32 hash,
        bytes32 r,
        bytes32 vs
    ) internal pure returns (address, RecoverError) {
        bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff);
        uint8 v = uint8((uint256(vs) >> 255) + 27);
        return tryRecover(hash, v, r, s);
    }

    /**
     * @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately.
     *
     * _Available since v4.2._
     */
    function recover(
        bytes32 hash,
        bytes32 r,
        bytes32 vs
    ) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, r, vs);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Overload of {ECDSA-tryRecover} that receives the `v`,
     * `r` and `s` signature fields separately.
     *
     * _Available since v4.3._
     */
    function tryRecover(
        bytes32 hash,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal pure returns (address, RecoverError) {
        // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
        // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
        // the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most
        // signatures from current libraries generate a unique signature with an s-value in the lower half order.
        //
        // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
        // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
        // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
        // these malleable signatures as well.
        if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {
            return (address(0), RecoverError.InvalidSignatureS);
        }
        if (v != 27 && v != 28) {
            return (address(0), RecoverError.InvalidSignatureV);
        }

        // If the signature is valid (and not malleable), return the signer address
        address signer = ecrecover(hash, v, r, s);
        if (signer == address(0)) {
            return (address(0), RecoverError.InvalidSignature);
        }

        return (signer, RecoverError.NoError);
    }

    /**
     * @dev Overload of {ECDSA-recover} that receives the `v`,
     * `r` and `s` signature fields separately.
     */
    function recover(
        bytes32 hash,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, v, r, s);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Returns an Ethereum Signed Message, created from a `hash`. This
     * produces hash corresponding to the one signed with the
     * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
     * JSON-RPC method as part of EIP-191.
     *
     * See {recover}.
     */
    function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {
        // 32 is the length in bytes of hash,
        // enforced by the type signature above
        return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
    }

    /**
     * @dev Returns an Ethereum Signed Message, created from `s`. This
     * produces hash corresponding to the one signed with the
     * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
     * JSON-RPC method as part of EIP-191.
     *
     * See {recover}.
     */
    function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n", Strings.toString(s.length), s));
    }

    /**
     * @dev Returns an Ethereum Signed Typed Data, created from a
     * `domainSeparator` and a `structHash`. This produces hash corresponding
     * to the one signed with the
     * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]
     * JSON-RPC method as part of EIP-712.
     *
     * See {recover}.
     */
    function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash));
    }
}

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

pragma solidity ^0.8.0;

/**
 * @title Counters
 * @author Matt Condon (@shrugs)
 * @dev Provides counters that can only be incremented, decremented or reset. This can be used e.g. to track the number
 * of elements in a mapping, issuing ERC721 ids, or counting request ids.
 *
 * Include with `using Counters for Counters.Counter;`
 */
library Counters {
    struct Counter {
        // This variable should never be directly accessed by users of the library: interactions must be restricted to
        // the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add
        // this feature: see https://github.com/ethereum/solidity/issues/4637
        uint256 _value; // default: 0
    }

    function current(Counter storage counter) internal view returns (uint256) {
        return counter._value;
    }

    function increment(Counter storage counter) internal {
        unchecked {
            counter._value += 1;
        }
    }

    function decrement(Counter storage counter) internal {
        uint256 value = counter._value;
        require(value > 0, "Counter: decrement overflow");
        unchecked {
            counter._value = value - 1;
        }
    }

    function reset(Counter storage counter) internal {
        counter._value = 0;
    }
}

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

pragma solidity ^0.8.1;

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

        return account.code.length > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

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

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

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

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

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

        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

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

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");

        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

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

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");

        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly
                /// @solidity memory-safe-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.8.0;

/// @title Multicall interface
/// @notice Enables calling multiple methods in a single call to the contract
// From: https://github.com/Uniswap/v3-periphery/contracts/interfaces/IMulticall.sol
interface IMulticall {
    /// @notice Call multiple functions in the current contract and return the data from all of them if they all succeed
    /// @dev The `msg.value` should not be trusted for any method callable from multicall.
    /// @param data The encoded function data for each of the calls to make to this contract
    /// @return results The results from each of the calls passed in via data
    function multicall(bytes[] calldata data) external payable returns (bytes[] memory results);
}

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

interface AggregatorInterface {
  function latestAnswer() external view returns (int256);

  function latestTimestamp() external view returns (uint256);

  function latestRound() external view returns (uint256);

  function getAnswer(uint256 roundId) external view returns (int256);

  function getTimestamp(uint256 roundId) external view returns (uint256);

  event AnswerUpdated(int256 indexed current, uint256 indexed roundId, uint256 updatedAt);

  event NewRound(uint256 indexed roundId, address indexed startedBy, uint256 startedAt);
}

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

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

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

  function version() external view returns (uint256);

  // getRoundData and latestRoundData should both raise "No data present"
  // if they do not have data to report, instead of returning unset values
  // which could be misinterpreted as actual reported values.
  function getRoundData(uint80 _roundId)
    external
    view
    returns (
      uint80 roundId,
      int256 answer,
      uint256 startedAt,
      uint256 updatedAt,
      uint80 answeredInRound
    );

  function latestRoundData()
    external
    view
    returns (
      uint80 roundId,
      int256 answer,
      uint256 startedAt,
      uint256 updatedAt,
      uint80 answeredInRound
    );
}

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

pragma solidity ^0.8.0;

/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
    uint8 private constant _ADDRESS_LENGTH = 20;

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

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

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

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

    /**
     * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation.
     */
    function toHexString(address addr) internal pure returns (string memory) {
        return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH);
    }
}

{
  "remappings": [
    "@chainlink/=lib/chainlink/",
    "@ds-test/=lib/forge-std/lib/ds-test/src/",
    "@ensdomains/=node_modules/@ensdomains/",
    "@forge-std/=lib/forge-std/src/",
    "@openzeppelin/=lib/openzeppelin-contracts/",
    "@solmate/=lib/solmate/src/",
    "@uniswap/v3-core/=lib/v3-core/",
    "@uniswap/v3-periphery/=lib/v3-periphery/",
    "chainlink/=lib/chainlink/",
    "ds-test/=lib/forge-std/lib/ds-test/src/",
    "eth-gas-reporter/=node_modules/eth-gas-reporter/",
    "forge-std/=lib/forge-std/src/",
    "hardhat/=node_modules/hardhat/",
    "openzeppelin-contracts/=lib/openzeppelin-contracts/",
    "solmate/=lib/solmate/src/"
  ],
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "london",
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

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Cellar.WithdrawType","name":"newWithdrawType","type":"uint8"}],"name":"setWithdrawType","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"shareLockPeriod","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"index1","type":"uint256"},{"internalType":"uint256","name":"index2","type":"uint256"}],"name":"swapPositions","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalAssets","outputs":[{"internalType":"uint256","name":"assets","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalAssetsWithdrawable","outputs":[{"internalType":"uint256","name":"assets","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"position","type":"address"},{"internalType":"enum Cellar.PositionType","name":"positionType","type":"uint8"}],"name":"trustPosition","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"userShareLockStartBlock","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"assets","type":"uint256"},{"internalType":"address","name":"receiver","type":"address"},{"internalType":"address","name":"owner","type":"address"}],"name":"withdraw","outputs":[{"internalType":"uint256","name":"shares","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"withdrawType","outputs":[{"internalType":"enum Cellar.WithdrawType","name":"","type":"uint8"}],"stateMutability":"view","type":"function"}]

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

-----Decoded View---------------
Arg [0] : _registry (address): 0xbEa8578d862b4416AD99eE1c12aB7B869825322e
Arg [1] : _asset (address): 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48
Arg [2] : _positions (address[]): 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48,0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2,0x2260FAC5E5542a773Aa44fBCfeDf7C193bc2C599
Arg [3] : _positionTypes (uint8[]): 0,0,0
Arg [4] : _holdingPosition (address): 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48
Arg [5] : _withdrawType (uint8): 1
Arg [6] : _name (string): Test-B
Arg [7] : _symbol (string): TestB
Arg [8] : _strategistPayout (address): 0x96aC8F8a3E8BB254c78dA4712021822934a8294c

-----Encoded View---------------
21 Constructor Arguments found :
Arg [0] : 000000000000000000000000bea8578d862b4416ad99ee1c12ab7b869825322e
Arg [1] : 000000000000000000000000a0b86991c6218b36c1d19d4a2e9eb0ce3606eb48
Arg [2] : 0000000000000000000000000000000000000000000000000000000000000120
Arg [3] : 00000000000000000000000000000000000000000000000000000000000001a0
Arg [4] : 000000000000000000000000a0b86991c6218b36c1d19d4a2e9eb0ce3606eb48
Arg [5] : 0000000000000000000000000000000000000000000000000000000000000001
Arg [6] : 0000000000000000000000000000000000000000000000000000000000000220
Arg [7] : 0000000000000000000000000000000000000000000000000000000000000260
Arg [8] : 00000000000000000000000096ac8f8a3e8bb254c78da4712021822934a8294c
Arg [9] : 0000000000000000000000000000000000000000000000000000000000000003
Arg [10] : 000000000000000000000000a0b86991c6218b36c1d19d4a2e9eb0ce3606eb48
Arg [11] : 000000000000000000000000c02aaa39b223fe8d0a0e5c4f27ead9083c756cc2
Arg [12] : 0000000000000000000000002260fac5e5542a773aa44fbcfedf7c193bc2c599
Arg [13] : 0000000000000000000000000000000000000000000000000000000000000003
Arg [14] : 0000000000000000000000000000000000000000000000000000000000000000
Arg [15] : 0000000000000000000000000000000000000000000000000000000000000000
Arg [16] : 0000000000000000000000000000000000000000000000000000000000000000
Arg [17] : 0000000000000000000000000000000000000000000000000000000000000006
Arg [18] : 546573742d420000000000000000000000000000000000000000000000000000
Arg [19] : 0000000000000000000000000000000000000000000000000000000000000005
Arg [20] : 5465737442000000000000000000000000000000000000000000000000000000