// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (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 functionCallWithValue(target, data, 0, "Address: low-level call failed");
    }

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

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

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

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

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

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

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

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

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

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

// SPDX-License-Identifier: UNLICENSED
// Copyright (c) 2023 Tokemak Foundation. All rights reserved.

pragma solidity 0.8.17;

import { Errors } from "src/utils/Errors.sol";
import { LibAdapter } from "src/libs/LibAdapter.sol";
import { IDestinationVault } from "src/interfaces/vault/IDestinationVault.sol";
import { Math } from "openzeppelin-contracts/utils/math/Math.sol";
import { EnumerableSet } from "openzeppelin-contracts/utils/structs/EnumerableSet.sol";
import { IStrategy } from "src/interfaces/strategy/IStrategy.sol";
import { SafeERC20 } from "openzeppelin-contracts/token/ERC20/utils/SafeERC20.sol";
import { IERC20Metadata as IERC20 } from "openzeppelin-contracts/token/ERC20/extensions/IERC20Metadata.sol";
import { IERC3156FlashBorrower } from "openzeppelin-contracts/interfaces/IERC3156FlashBorrower.sol";
import { IAutopoolStrategy } from "src/interfaces/strategy/IAutopoolStrategy.sol";
import { StructuredLinkedList } from "src/strategy/StructuredLinkedList.sol";
import { WithdrawalQueue } from "src/strategy/WithdrawalQueue.sol";
import { IAutopool } from "src/interfaces/vault/IAutopool.sol";
import { IMainRewarder } from "src/interfaces/rewarders/IMainRewarder.sol";
import { AutopoolToken } from "src/vault/libs/AutopoolToken.sol";

library AutopoolDebt {
    using Math for uint256;
    using SafeERC20 for IERC20;
    using WithdrawalQueue for StructuredLinkedList.List;
    using EnumerableSet for EnumerableSet.AddressSet;
    using AutopoolToken for AutopoolToken.TokenData;

    /// @notice Max time a cached debt report can be used
    uint256 public constant MAX_DEBT_REPORT_AGE_SECONDS = 1 days;

    error VaultShutdown();
    error WithdrawShareCalcInvalid(uint256 currentShares, uint256 cachedShares);
    error RebalanceDestinationsMatch(address destinationVault);
    error RebalanceFailed(string message);
    error InvalidPrices();
    error InvalidTotalAssetPurpose();
    error InvalidDestination(address destination);
    error TooFewAssets(uint256 requested, uint256 actual);
    error SharesAndAssetsReceived(uint256 assets, uint256 shares);
    error AmountExceedsAllowance(uint256 shares, uint256 allowed);

    event DestinationDebtReporting(
        address destination, AutopoolDebt.IdleDebtUpdates debtInfo, uint256 claimed, uint256 claimGasUsed
    );
    event NewNavShareFeeMark(uint256 navPerShare, uint256 timestamp);
    event Nav(uint256 idle, uint256 debt, uint256 totalSupply);
    event Withdraw(
        address indexed sender, address indexed receiver, address indexed owner, uint256 assets, uint256 shares
    );

    struct DestinationInfo {
        /// @notice Current underlying value at the destination vault
        /// @dev Used for calculating totalDebt, mid point of min and max
        uint256 cachedDebtValue;
        /// @notice Current minimum underlying value at the destination vault
        /// @dev Used for calculating totalDebt during withdrawal
        uint256 cachedMinDebtValue;
        /// @notice Current maximum underlying value at the destination vault
        /// @dev Used for calculating totalDebt of the deposit
        uint256 cachedMaxDebtValue;
        /// @notice Last block timestamp this info was updated
        uint256 lastReport;
        /// @notice How many shares of the destination vault we owned at last report
        uint256 ownedShares;
    }

    struct IdleDebtUpdates {
        bool pricesWereSafe;
        uint256 totalIdleDecrease;
        uint256 totalIdleIncrease;
        uint256 totalDebtIncrease;
        uint256 totalDebtDecrease;
        uint256 totalMinDebtIncrease;
        uint256 totalMinDebtDecrease;
        uint256 totalMaxDebtIncrease;
        uint256 totalMaxDebtDecrease;
    }

    struct RebalanceOutParams {
        /// Address that will received the withdrawn underlyer
        address receiver;
        /// The "out" destination vault
        address destinationOut;
        /// The amount of tokenOut that will be withdrawn
        uint256 amountOut;
        /// The underlyer for destinationOut
        address tokenOut;
        IERC20 _baseAsset;
        bool _shutdown;
    }

    /// @dev In memory struct only for managing vars in _withdraw
    struct WithdrawInfo {
        uint256 currentIdle;
        uint256 assetsFromIdle;
        uint256 totalAssetsToPull;
        uint256 assetsToPull;
        uint256 assetsPulled;
        uint256 idleIncrease;
        uint256 debtDecrease;
        uint256 debtMinDecrease;
        uint256 debtMaxDecrease;
        uint256 totalMinDebt;
        uint256 destinationRound;
        uint256 lastRoundSlippage;
        uint256 expectedAssets;
    }

    struct FlashRebalanceParams {
        uint256 totalIdle;
        uint256 totalDebt;
        IERC20 baseAsset;
        bool shutdown;
    }

    struct FlashResultInfo {
        uint256 tokenInBalanceBefore;
        uint256 tokenInBalanceAfter;
        bytes32 flashResult;
    }

    function flashRebalance(
        DestinationInfo storage destInfoOut,
        DestinationInfo storage destInfoIn,
        IERC3156FlashBorrower receiver,
        IStrategy.RebalanceParams memory params,
        IStrategy.SummaryStats memory destSummaryOut,
        IAutopoolStrategy autoPoolStrategy,
        FlashRebalanceParams memory flashParams,
        bytes calldata data
    ) external returns (IdleDebtUpdates memory result) {
        // Handle decrease (shares going "Out", cashing in shares and sending underlying back to swapper)
        // If the tokenOut is _asset we assume they are taking idle
        // which is already in the contract
        result = _handleRebalanceOut(
            AutopoolDebt.RebalanceOutParams({
                receiver: address(receiver),
                destinationOut: params.destinationOut,
                amountOut: params.amountOut,
                tokenOut: params.tokenOut,
                _baseAsset: flashParams.baseAsset,
                _shutdown: flashParams.shutdown
            }),
            destInfoOut
        );

        if (!result.pricesWereSafe) {
            revert InvalidPrices();
        }

        // Handle increase (shares coming "In", getting underlying from the swapper and trading for new shares)
        if (params.amountIn > 0) {
            FlashResultInfo memory flashResultInfo;
            // get "before" counts
            flashResultInfo.tokenInBalanceBefore = IERC20(params.tokenIn).balanceOf(address(this));

            // Give control back to the solver so they can make use of the "out" assets
            // and get our "in" asset
            flashResultInfo.flashResult = receiver.onFlashLoan(msg.sender, params.tokenIn, params.amountIn, 0, data);

            // We assume the solver will send us the assets
            flashResultInfo.tokenInBalanceAfter = IERC20(params.tokenIn).balanceOf(address(this));

            // Make sure the call was successful and verify we have at least the assets we think
            // we were getting
            if (
                flashResultInfo.flashResult != keccak256("ERC3156FlashBorrower.onFlashLoan")
                    || flashResultInfo.tokenInBalanceAfter < flashResultInfo.tokenInBalanceBefore + params.amountIn
            ) {
                revert Errors.FlashLoanFailed(params.tokenIn, params.amountIn);
            }

            {
                // make sure we have a valid path
                (bool success, string memory message) = autoPoolStrategy.verifyRebalance(params, destSummaryOut);
                if (!success) {
                    revert RebalanceFailed(message);
                }
            }

            if (params.tokenIn != address(flashParams.baseAsset)) {
                IdleDebtUpdates memory inDebtResult = _handleRebalanceIn(
                    destInfoIn,
                    IDestinationVault(params.destinationIn),
                    params.tokenIn,
                    flashResultInfo.tokenInBalanceAfter
                );
                if (!inDebtResult.pricesWereSafe) {
                    revert InvalidPrices();
                }
                result.totalDebtDecrease += inDebtResult.totalDebtDecrease;
                result.totalDebtIncrease += inDebtResult.totalDebtIncrease;
                result.totalMinDebtDecrease += inDebtResult.totalMinDebtDecrease;
                result.totalMinDebtIncrease += inDebtResult.totalMinDebtIncrease;
                result.totalMaxDebtDecrease += inDebtResult.totalMaxDebtDecrease;
                result.totalMaxDebtIncrease += inDebtResult.totalMaxDebtIncrease;
            } else {
                result.totalIdleIncrease += flashResultInfo.tokenInBalanceAfter - flashResultInfo.tokenInBalanceBefore;
            }
        }
    }

    /// @notice Perform deposit and debt info update for the "in" destination during a rebalance
    /// @dev This "in" function performs less validations than its "out" version
    /// @param dvIn The "in" destination vault
    /// @param tokenIn The underlyer for dvIn
    /// @param depositAmount The amount of tokenIn that will be deposited
    /// @return result Changes in debt values
    function _handleRebalanceIn(
        DestinationInfo storage destInfo,
        IDestinationVault dvIn,
        address tokenIn,
        uint256 depositAmount
    ) private returns (IdleDebtUpdates memory result) {
        LibAdapter._approve(IERC20(tokenIn), address(dvIn), depositAmount);

        // Snapshot our current shares so we know how much to back out
        uint256 originalShareBal = dvIn.balanceOf(address(this));

        // deposit to dv
        uint256 newShares = dvIn.depositUnderlying(depositAmount);

        // Update the debt info snapshot
        result = _recalculateDestInfo(destInfo, dvIn, originalShareBal, originalShareBal + newShares);
    }

    /**
     * @notice Perform withdraw and debt info update for the "out" destination during a rebalance
     * @dev This "out" function performs more validations and handles idle as opposed to "in" which does not
     *  debtDecrease The previous amount of debt destinationOut accounted for in totalDebt
     *  debtIncrease The current amount of debt destinationOut should account for in totalDebt
     *  idleDecrease Amount of baseAsset that was sent from the vault. > 0 only when tokenOut == baseAsset
     *  idleIncrease Amount of baseAsset that was claimed from Destination Vault
     * @param params Rebalance out params
     * @param destOutInfo The "out" destination vault info
     * @return assetChange debt and idle change data
     */
    function _handleRebalanceOut(
        RebalanceOutParams memory params,
        DestinationInfo storage destOutInfo
    ) private returns (IdleDebtUpdates memory assetChange) {
        // Handle decrease (shares going "Out", cashing in shares and sending underlying back to swapper)
        // If the tokenOut is _asset we assume they are taking idle
        // which is already in the contract
        if (params.amountOut > 0) {
            if (params.tokenOut != address(params._baseAsset)) {
                IDestinationVault dvOut = IDestinationVault(params.destinationOut);

                // Snapshot our current shares so we know how much to back out
                uint256 originalShareBal = dvOut.balanceOf(address(this));

                // Burning our shares will claim any pending baseAsset
                // rewards and send them to us.
                // Get our starting balance
                uint256 beforeBaseAssetBal = params._baseAsset.balanceOf(address(this));

                // Withdraw underlying from the destination vault
                // Shares are sent directly to the flashRebalance receiver
                // slither-disable-next-line unused-return
                dvOut.withdrawUnderlying(params.amountOut, params.receiver);

                // Update the debt info snapshot
                assetChange =
                    _recalculateDestInfo(destOutInfo, dvOut, originalShareBal, originalShareBal - params.amountOut);

                // Capture any rewards we may have claimed as part of withdrawing
                assetChange.totalIdleIncrease = params._baseAsset.balanceOf(address(this)) - beforeBaseAssetBal;
            } else {
                // If we are shutdown then the only operations we should be performing are those that get
                // the base asset back to the vault. We shouldn't be sending out more

                if (params._shutdown) {
                    revert VaultShutdown();
                }
                // Working with idle baseAsset which should be in the vault already
                // Just send it out
                IERC20(params.tokenOut).safeTransfer(params.receiver, params.amountOut);
                assetChange.totalIdleDecrease = params.amountOut;

                // We weren't dealing with any debt or pricing, just idle, so we can just mark
                // it as safe
                assetChange.pricesWereSafe = true;
            }
        }
    }

    function recalculateDestInfo(
        DestinationInfo storage destInfo,
        IDestinationVault destVault,
        uint256 originalShares,
        uint256 currentShares
    ) external returns (IdleDebtUpdates memory result) {
        result = _recalculateDestInfo(destInfo, destVault, originalShares, currentShares);
    }

    /// @dev Will not revert on unsafe prices. Up to the caller.
    function _recalculateDestInfo(
        DestinationInfo storage destInfo,
        IDestinationVault destVault,
        uint256 originalShares,
        uint256 currentShares
    ) private returns (IdleDebtUpdates memory result) {
        // TODO: Trace the use of this fn and ensure that every is handling is pricesWereSafe

        // Figure out what to back out of our totalDebt number.
        // We could have had withdraws since the last snapshot which means our
        // cached currentDebt number should be decreased based on the remaining shares
        // totalDebt is decreased using the same proportion of shares method during withdrawals
        // so this should represent whatever is remaining.

        // Prices are per LP token and whether or not the prices are safe to use
        // If they aren't safe then just continue and we'll get it on the next go around
        (uint256 spotPrice, uint256 safePrice, bool isSpotSafe) = destVault.getRangePricesLP();

        // Calculate what we're backing out based on the original shares
        uint256 minPrice = spotPrice > safePrice ? safePrice : spotPrice;
        uint256 maxPrice = spotPrice > safePrice ? spotPrice : safePrice;

        // If we previously had shares, calculate how much of our cached numbers
        // still remain as this will be deducted from the overall debt numbers
        // TODO: Evaluate whether to round these up so we don't accumulate small amounts
        // over time
        uint256 prevOwnedShares = destInfo.ownedShares;
        if (prevOwnedShares > 0) {
            result.totalDebtDecrease = (destInfo.cachedDebtValue * originalShares) / prevOwnedShares;
            result.totalMinDebtDecrease = (destInfo.cachedMinDebtValue * originalShares) / prevOwnedShares;
            result.totalMaxDebtDecrease = (destInfo.cachedMaxDebtValue * originalShares) / prevOwnedShares;
        }

        // The overall debt value is the mid point of min and max
        uint256 div = 10 ** destVault.decimals();
        uint256 newDebtValue = (minPrice * currentShares + maxPrice * currentShares) / (div * 2);

        result.pricesWereSafe = isSpotSafe;
        result.totalDebtIncrease = newDebtValue;
        result.totalMinDebtIncrease = minPrice * currentShares / div;
        result.totalMaxDebtIncrease = maxPrice * currentShares / div;

        // Save our current new values
        destInfo.cachedDebtValue = newDebtValue;
        destInfo.cachedMinDebtValue = result.totalMinDebtIncrease;
        destInfo.cachedMaxDebtValue = result.totalMaxDebtIncrease;
        destInfo.lastReport = block.timestamp;
        destInfo.ownedShares = currentShares;
    }

    function totalAssetsTimeChecked(
        StructuredLinkedList.List storage debtReportQueue,
        mapping(address => AutopoolDebt.DestinationInfo) storage destinationInfo,
        IAutopool.TotalAssetPurpose purpose
    ) external returns (uint256) {
        IDestinationVault destVault = IDestinationVault(debtReportQueue.peekHead());
        uint256 recalculatedTotalAssets = IAutopool(address(this)).totalAssets(purpose);

        while (address(destVault) != address(0)) {
            uint256 lastReport = destinationInfo[address(destVault)].lastReport;

            if (lastReport + MAX_DEBT_REPORT_AGE_SECONDS > block.timestamp) {
                // Its not stale

                // This report is OK, we don't need to recalculate anything
                break;
            } else {
                // It is stale, recalculate

                //slither-disable-next-line unused-return
                uint256 currentShares = destVault.balanceOf(address(this));
                uint256 staleDebt;
                uint256 extremePrice;

                // Figure out exactly which price to use based on its purpose
                if (purpose == IAutopool.TotalAssetPurpose.Deposit) {
                    // We use max value so that anything deposited is worth less
                    extremePrice = destVault.getUnderlyerCeilingPrice();

                    // Round down. We are subtracting this value out of the total so some left
                    // behind just increases the value which is what we want
                    staleDebt = destinationInfo[address(destVault)].cachedMaxDebtValue.mulDiv(
                        currentShares, destinationInfo[address(destVault)].ownedShares, Math.Rounding.Down
                    );
                } else if (purpose == IAutopool.TotalAssetPurpose.Withdraw) {
                    // We use min value so that we value the shares as worth less
                    extremePrice = destVault.getUnderlyerFloorPrice();
                    // Round up. We are subtracting this value out of the total so if we take a little
                    // extra it just decreases the value which is what we want
                    staleDebt = destinationInfo[address(destVault)].cachedMinDebtValue.mulDiv(
                        currentShares, destinationInfo[address(destVault)].ownedShares, Math.Rounding.Up
                    );
                } else {
                    revert InvalidTotalAssetPurpose();
                }

                // Back out our stale debt, add in its new value
                // Our goal is to find the most conservative value in each situation. If the current
                // value we have represents that, then use it. Otherwise, use the new one.
                uint256 newValue = (currentShares * extremePrice) / destVault.ONE();

                if (purpose == IAutopool.TotalAssetPurpose.Deposit && staleDebt > newValue) {
                    newValue = staleDebt;
                } else if (purpose == IAutopool.TotalAssetPurpose.Withdraw && staleDebt < newValue) {
                    newValue = staleDebt;
                }

                recalculatedTotalAssets = recalculatedTotalAssets + newValue - staleDebt;
            }

            destVault = IDestinationVault(debtReportQueue.getAdjacent(address(destVault), true));
        }

        return recalculatedTotalAssets;
    }

    function _updateDebtReporting(
        StructuredLinkedList.List storage debtReportQueue,
        mapping(address => AutopoolDebt.DestinationInfo) storage destinationInfo,
        uint256 numToProcess
    ) external returns (IdleDebtUpdates memory result) {
        numToProcess = Math.min(numToProcess, debtReportQueue.sizeOf());

        for (uint256 i = 0; i < numToProcess; ++i) {
            IDestinationVault destVault = IDestinationVault(debtReportQueue.popHead());

            // Get the reward value we've earned. DV rewards are always in terms of base asset
            // We track the gas used purely for off-chain stats purposes
            // Main rewarder on DV's store the earned and liquidated rewards
            // Extra rewarders are disabled at the DV level
            uint256 claimGasUsed = gasleft();
            uint256 beforeBaseAsset = IERC20(IAutopool(address(this)).asset()).balanceOf(address(this));
            IMainRewarder(destVault.rewarder()).getReward(address(this), false);
            uint256 claimedRewardValue =
                IERC20(IAutopool(address(this)).asset()).balanceOf(address(this)) - beforeBaseAsset;
            result.totalIdleIncrease += claimedRewardValue;

            // Recalculate the debt info figuring out the change in
            // total debt value we can roll up later
            uint256 currentShareBalance = destVault.balanceOf(address(this));

            AutopoolDebt.IdleDebtUpdates memory debtResult = _recalculateDestInfo(
                destinationInfo[address(destVault)], destVault, currentShareBalance, currentShareBalance
            );

            result.totalDebtDecrease += debtResult.totalDebtDecrease;
            result.totalDebtIncrease += debtResult.totalDebtIncrease;
            result.totalMinDebtDecrease += debtResult.totalMinDebtDecrease;
            result.totalMinDebtIncrease += debtResult.totalMinDebtIncrease;
            result.totalMaxDebtDecrease += debtResult.totalMaxDebtDecrease;
            result.totalMaxDebtIncrease += debtResult.totalMaxDebtIncrease;

            // If we no longer have shares, then there's no reason to continue reporting on the destination.
            // The strategy will only call for the info if its moving "out" of the destination
            // and that will only happen if we have shares.
            // A rebalance where we move "in" to the position will refresh the data at that time
            if (currentShareBalance > 0) {
                debtReportQueue.addToTail(address(destVault));
            }

            claimGasUsed -= gasleft();

            emit DestinationDebtReporting(address(destVault), debtResult, claimedRewardValue, claimGasUsed);
        }
    }

    function _initiateWithdrawInfo(
        uint256 assets,
        IAutopool.AssetBreakdown storage assetBreakdown
    ) private view returns (WithdrawInfo memory) {
        uint256 idle = assetBreakdown.totalIdle;
        WithdrawInfo memory info = WithdrawInfo({
            currentIdle: idle,
            // If idle can cover the full amount, then we want to pull all assets from there
            // Otherwise, we want to pull from the market and only get idle if we exhaust the market
            assetsFromIdle: assets > idle ? 0 : assets,
            totalAssetsToPull: 0,
            assetsToPull: 0,
            assetsPulled: 0,
            idleIncrease: 0,
            debtDecrease: 0,
            debtMinDecrease: 0,
            debtMaxDecrease: 0,
            totalMinDebt: assetBreakdown.totalDebtMin,
            destinationRound: 0,
            lastRoundSlippage: 0,
            expectedAssets: 0
        });

        info.totalAssetsToPull = assets - info.assetsFromIdle;

        // This var we use to track our progress later
        info.assetsToPull = assets - info.assetsFromIdle;

        // Idle + minDebt is the maximum amount of assets/debt we could burn during a withdraw.
        // If the user is request more than that (like during a withdraw) we can just revert
        // early without trying
        if (info.totalAssetsToPull > info.currentIdle + info.totalMinDebt) {
            revert TooFewAssets(assets, info.currentIdle + info.totalMinDebt);
        }

        return info;
    }

    function withdraw(
        uint256 assets,
        uint256 applicableTotalAssets,
        IAutopool.AssetBreakdown storage assetBreakdown,
        StructuredLinkedList.List storage withdrawalQueue,
        mapping(address => AutopoolDebt.DestinationInfo) storage destinationInfo
    ) public returns (uint256 actualAssets, uint256 actualShares, uint256 debtBurned) {
        WithdrawInfo memory info = _initiateWithdrawInfo(assets, assetBreakdown);

        // Pull the market if there aren't enough funds in idle to cover the entire amount

        // This flow is not bounded by a set number of shares. The user has requested X assets
        // and a variable number of shares to burn so we don't have easy break out points like we do
        // during redeem (like using debt burned). When we get slippage here and don't meet the requested assets
        // we need to keep going if we can. This is tricky if we consider that (most of) our destinations are
        // LP positions and we'll be swapping assets, so we can expect some slippage. Even
        // if our minDebtValue numbers are up to date and perfectly accurate slippage could ensure we
        // are always receiving less than we expect/calculate and we never hit the requested assets
        // even though the owner would have shares to cover it. Under normal/expected conditions, our
        // minDebtValue is lower than actual and we expect overall value to be going up, so we burn a tad
        // more than we should and receive a tad more than we expect. This should cover us. However,
        // in other conditions we have to be sure we aren't endlessly trying to approach 0 so we are tracking
        // the slippage we received on the last pull, repricing, and applying an increasing multiplier until we either
        // pull enough to cover or pull them all and/or move to the next destination.

        uint256 dvSharesToBurn;
        while (info.assetsToPull > 0) {
            IDestinationVault destVault = IDestinationVault(withdrawalQueue.peekHead());
            if (address(destVault) == address(0)) {
                // TODO: This may be some NULL value too, check the underlying library
                break;
            }

            uint256 dvShares = destVault.balanceOf(address(this));
            {
                uint256 dvSharesValue;
                if (info.destinationRound == 0) {
                    // First time pulling

                    // We use the min debt value here because its a withdrawal and we're trying to cover an amount
                    // of assets. Undervaluing the shares may mean we pull more but given that we expect slippage
                    // that is desirable.
                    dvSharesValue = destinationInfo[address(destVault)].cachedMinDebtValue * dvShares
                        / destinationInfo[address(destVault)].ownedShares;
                } else {
                    // When we've pulled from this destination before, i.e. destinationRound > 0, then we
                    // know a more accurate exchange rate and its worse than we were expecting.
                    // We even will pad it a bit as we want to account for any additional slippage we
                    // may receive by say being farther down an AMM curve.

                    // dvSharesToBurn is the last value we used when pulling from this destination
                    // info.expectedAssets is how much we expected to get on that last pull
                    // info.expectedAssets - info.lastRoundSlippage is how much we actually received

                    uint256 paddedSlippage = info.lastRoundSlippage * (info.destinationRound + 10_000) / 10_000;

                    if (paddedSlippage < info.expectedAssets) {
                        dvSharesValue = (info.expectedAssets - paddedSlippage) * dvShares / dvSharesToBurn;
                    } else {
                        // This will just mean we pull all shares
                        dvSharesValue = 0;
                    }
                }

                if (dvSharesValue > info.assetsToPull) {
                    dvSharesToBurn = (dvShares * info.assetsToPull) / dvSharesValue;
                    // Only need to set it here because the only time we'll use it is if
                    // we don't exhaust all shares and have to try the destination again
                    info.expectedAssets = info.assetsToPull;
                } else {
                    dvSharesToBurn = dvShares;
                }
            }

            // Destination Vaults always burn the exact amount we instruct them to
            uint256 pulledAssets = destVault.withdrawBaseAsset(dvSharesToBurn, address(this));

            info.assetsPulled += pulledAssets;

            // Calculate the totalDebt we'll need to remove based on the shares we're burning
            // We're rounding up here so take care when actually applying to totalDebt
            // The assets we calculated to pull are from the minDebt number we track so
            // we'll use that one to ensure we properly account for slippage (the `pulled` var below)
            // The other two debt numbers we just need to keep up to date.
            uint256 debtMinDecrease = destinationInfo[address(destVault)].cachedMinDebtValue.mulDiv(
                dvSharesToBurn, destinationInfo[address(destVault)].ownedShares, Math.Rounding.Up
            );
            info.debtMinDecrease += debtMinDecrease;

            info.debtDecrease += destinationInfo[address(destVault)].cachedDebtValue.mulDiv(
                dvSharesToBurn, destinationInfo[address(destVault)].ownedShares, Math.Rounding.Up
            );
            info.debtMaxDecrease += destinationInfo[address(destVault)].cachedMaxDebtValue.mulDiv(
                dvSharesToBurn, destinationInfo[address(destVault)].ownedShares, Math.Rounding.Up
            );

            // If we've exhausted all shares we can remove the withdrawal from the queue
            // We need to leave it in the debt report queue though so that our destination specific
            // debt tracking values can be updated
            if (dvShares == dvSharesToBurn) {
                withdrawalQueue.popAddress(address(destVault));
                info.destinationRound = 0;
                info.lastRoundSlippage = 0;
            } else {
                // If we didn't burn all the shares and we received enough to cover our
                // expected that means we'll break out below as we've hit our target
                unchecked {
                    if (pulledAssets < info.expectedAssets) {
                        info.lastRoundSlippage = info.expectedAssets - pulledAssets;
                        if (info.destinationRound == 0) {
                            info.destinationRound = 100;
                        } else {
                            info.destinationRound *= 2;
                        }
                    }
                }
            }

            // It's possible we'll get back more assets than we anticipate from a swap
            // so if we do, throw it in idle and stop processing. You don't get more than we've calculated
            if (info.assetsPulled >= info.totalAssetsToPull) {
                info.idleIncrease += info.assetsPulled - info.totalAssetsToPull;
                info.assetsPulled = info.totalAssetsToPull;
                break;
            }

            info.assetsToPull -= pulledAssets;
        }

        // info.assetsToPull isn't safe to use past this point.
        // It may or may not be accurate from the previous loop

        // We didn't get enough assets from the debt pull
        // See if we can get the rest from idle
        if (info.assetsPulled < assets && info.currentIdle > 0) {
            uint256 remaining = assets - info.assetsPulled;
            if (remaining <= info.currentIdle) {
                info.assetsFromIdle = remaining;
            }
            // We don't worry about the else case because if currentIdle can't
            // cover remaining then we'll fail the `actualAssets < assets`
            // check below and revert
        }

        debtBurned = info.assetsFromIdle + info.debtMinDecrease;
        actualAssets = info.assetsFromIdle + info.assetsPulled;

        if (actualAssets < assets) {
            revert TooFewAssets(assets, actualAssets);
        }

        actualShares = IAutopool(address(this)).convertToShares(
            Math.max(actualAssets, debtBurned),
            applicableTotalAssets,
            IAutopool(address(this)).totalSupply(),
            Math.Rounding.Up
        );

        // Subtract what's taken out of idle from totalIdle
        // We may also have some increase to account for it we over pulled
        // or received better execution than we were anticipating
        // slither-disable-next-line events-maths
        assetBreakdown.totalIdle = info.currentIdle + info.idleIncrease - info.assetsFromIdle;

        // Save off our various debt numbers
        if (info.debtDecrease > assetBreakdown.totalDebt) {
            assetBreakdown.totalDebt = 0;
        } else {
            assetBreakdown.totalDebt -= info.debtDecrease;
        }

        if (info.debtMinDecrease > info.totalMinDebt) {
            assetBreakdown.totalDebtMin = 0;
        } else {
            assetBreakdown.totalDebtMin -= info.debtMinDecrease;
        }

        if (info.debtMaxDecrease > assetBreakdown.totalDebtMax) {
            assetBreakdown.totalDebtMax = 0;
        } else {
            assetBreakdown.totalDebtMax -= info.debtMaxDecrease;
        }
    }

    /// @notice Perform a removal of assets via the redeem path where the shares are the limiting factor.
    /// This means we break out whenever we reach either `assets` retrieved or debt value equivalent to `assets` burned
    function redeem(
        uint256 assets,
        uint256 applicableTotalAssets,
        IAutopool.AssetBreakdown storage assetBreakdown,
        StructuredLinkedList.List storage withdrawalQueue,
        mapping(address => AutopoolDebt.DestinationInfo) storage destinationInfo
    ) public returns (uint256 actualAssets, uint256 actualShares, uint256 debtBurned) {
        WithdrawInfo memory info = _initiateWithdrawInfo(assets, assetBreakdown);

        // If not enough funds in idle, then pull what we need from destinations
        bool exhaustedDestinations = false;
        while (info.assetsToPull > 0) {
            IDestinationVault destVault = IDestinationVault(withdrawalQueue.peekHead());
            if (address(destVault) == address(0)) {
                exhaustedDestinations = true;
                break;
            }

            uint256 dvShares = destVault.balanceOf(address(this));
            uint256 dvSharesToBurn = dvShares;
            {
                // Valuing these shares higher, rounding up, will result in us burning less of them
                // in the event we don't burn all of them. Good thing.
                uint256 dvSharesValue = destinationInfo[address(destVault)].cachedMinDebtValue.mulDiv(
                    dvSharesToBurn, destinationInfo[address(destVault)].ownedShares, Math.Rounding.Up
                );

                // If the dv shares we own are worth more than we need, limit the shares to burn
                // Any extra we get will be dropped into idle
                if (dvSharesValue > info.assetsToPull) {
                    uint256 limitedShares = (dvSharesToBurn * info.assetsToPull) / dvSharesValue;

                    // Final set for the actual shares we'll burn later
                    dvSharesToBurn = limitedShares;
                }
            }

            // Destination Vaults always burn the exact amount we instruct them to
            uint256 pulledAssets = destVault.withdrawBaseAsset(dvSharesToBurn, address(this));

            info.assetsPulled += pulledAssets;

            // Calculate the totalDebt we'll need to remove based on the shares we're burning
            // We're rounding up here so take care when actually applying to totalDebt
            // The assets we calculated to pull are from the minDebt number we track so
            // we'll use that one to ensure we properly account for slippage (the `pulled` var below)
            // The other two debt numbers we just need to keep up to date.
            uint256 debtMinDecrease = destinationInfo[address(destVault)].cachedMinDebtValue.mulDiv(
                dvSharesToBurn, destinationInfo[address(destVault)].ownedShares, Math.Rounding.Up
            );
            info.debtMinDecrease += debtMinDecrease;

            info.debtDecrease += destinationInfo[address(destVault)].cachedDebtValue.mulDiv(
                dvSharesToBurn, destinationInfo[address(destVault)].ownedShares, Math.Rounding.Up
            );
            info.debtMaxDecrease += destinationInfo[address(destVault)].cachedMaxDebtValue.mulDiv(
                dvSharesToBurn, destinationInfo[address(destVault)].ownedShares, Math.Rounding.Up
            );

            // If we've exhausted all shares we can remove the withdrawal from the queue
            // We need to leave it in the debt report queue though so that our destination specific
            // debt tracking values can be updated

            if (dvShares == dvSharesToBurn) {
                withdrawalQueue.popAddress(address(destVault));
            }

            // It's possible we'll get back more assets than we anticipate from a swap
            // so if we do, throw it in idle and stop processing. You don't get more than we've calculated
            if (info.assetsPulled >= info.totalAssetsToPull) {
                info.idleIncrease += info.assetsPulled - info.totalAssetsToPull;
                info.assetsPulled = info.totalAssetsToPull;
                break;
            }

            // Any deficiency in the amount we received is slippage. debtDecrease is what we expected
            // to receive. If we received any extra, that's great we'll roll it forward so we burn
            // less on the next loop.
            uint256 pulled = Math.max(debtMinDecrease, pulledAssets);
            if (pulled >= info.assetsToPull) {
                // We either have enough assets, or we've burned the max debt we're allowed
                break;
            } else {
                info.assetsToPull -= pulled;
            }

            // If we didn't exhaust all of the shares from the destination it means we
            // assume we will get everything we need from there and everything else is slippage
            if (dvShares != dvSharesToBurn) {
                break;
            }
        }

        // info.assetsToPull isn't safe to use past this point.
        // It may or may not be accurate from the previous loop

        // We didn't get enough assets from the debt pull
        // See if we can get the rest from idle
        // Check the debt burned though to ensure that we don't try to make up
        // slippage incurred out of idle
        if (
            info.assetsPulled < assets && info.debtMinDecrease < assets && info.currentIdle > 0 && exhaustedDestinations
        ) {
            uint256 remaining = assets - Math.max(info.assetsPulled, info.debtMinDecrease);
            if (remaining < info.currentIdle) {
                info.assetsFromIdle = remaining;
            } else {
                info.assetsFromIdle = info.currentIdle;
            }
        }

        debtBurned = info.assetsFromIdle + info.debtMinDecrease;
        actualAssets = info.assetsFromIdle + info.assetsPulled;

        actualShares = IAutopool(address(this)).convertToShares(
            debtBurned, applicableTotalAssets, IAutopool(address(this)).totalSupply(), Math.Rounding.Up
        );

        // Subtract what's taken out of idle from totalIdle
        // We may also have some increase to account for it we over pulled
        // or received better execution than we were anticipating
        // slither-disable-next-line events-maths
        assetBreakdown.totalIdle = info.currentIdle + info.idleIncrease - info.assetsFromIdle;

        // Save off our various debt numbers
        if (info.debtDecrease > assetBreakdown.totalDebt) {
            assetBreakdown.totalDebt = 0;
        } else {
            assetBreakdown.totalDebt -= info.debtDecrease;
        }

        if (info.debtMinDecrease > info.totalMinDebt) {
            assetBreakdown.totalDebtMin = 0;
        } else {
            assetBreakdown.totalDebtMin -= info.debtMinDecrease;
        }

        if (info.debtMaxDecrease > assetBreakdown.totalDebtMax) {
            assetBreakdown.totalDebtMax = 0;
        } else {
            assetBreakdown.totalDebtMax -= info.debtMaxDecrease;
        }
    }

    /**
     * @notice Function to complete a withdrawal or redeem.  This runs after shares to be burned and assets to be
     *    transferred are calculated.
     * @param assets Amount of assets to be transferred to receiver.
     * @param shares Amount of shares to be burned from owner.
     * @param owner Owner of shares, user to burn shares from.
     * @param receiver The receiver of the baseAsset.
     * @param baseAsset Base asset of the Autopool.
     * @param assetBreakdown Asset breakdown for the Autopool.
     * @param tokenData Token data for the Autopool.
     */
    function completeWithdrawal(
        uint256 assets,
        uint256 shares,
        address owner,
        address receiver,
        IERC20 baseAsset,
        IAutopool.AssetBreakdown storage assetBreakdown,
        AutopoolToken.TokenData storage tokenData
    ) external {
        if (msg.sender != owner) {
            uint256 allowed = IAutopool(address(this)).allowance(owner, msg.sender);
            if (allowed != type(uint256).max) {
                if (shares > allowed) revert AmountExceedsAllowance(shares, allowed);

                unchecked {
                    tokenData.approve(owner, msg.sender, allowed - shares);
                }
            }
        }

        tokenData.burn(owner, shares);

        uint256 ts = IAutopool(address(this)).totalSupply();

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

        emit Nav(assetBreakdown.totalIdle, assetBreakdown.totalDebt, ts);

        baseAsset.safeTransfer(receiver, assets);
    }

    /**
     * @notice A helper function to get estimates of what would happen on a withdraw or redeem.
     * @dev Reverts all changing state.
     * @param previewWithdraw Bool denoting whether to preview a redeem or withdrawal.
     * @param assets Assets to be withdrawn or redeemed.
     * @param applicableTotalAssets Operation dependent assets in the Autopool.
     * @param functionCallEncoded Abi encoded function signature for recursive call.
     * @param assetBreakdown Breakdown of vault assets from Autopool storage.
     * @param withdrawalQueue Destination vault withdrawal queue from Autopool storage.
     * @param destinationInfo Mapping of information for destinations.
     * @return assetsAmount Preview of amount of assets to send to receiver.
     * @return sharesAmount Preview of amount of assets to burn from owner.
     */
    function preview(
        bool previewWithdraw,
        uint256 assets,
        uint256 applicableTotalAssets,
        bytes memory functionCallEncoded,
        IAutopool.AssetBreakdown storage assetBreakdown,
        StructuredLinkedList.List storage withdrawalQueue,
        mapping(address => AutopoolDebt.DestinationInfo) storage destinationInfo
    ) external returns (uint256 assetsAmount, uint256 sharesAmount) {
        if (msg.sender != address(this)) {
            // Perform a recursive call the function in `funcCallEncoded`.  This will result in a call back to
            // the Autopool, and then this function. The intention is to reach the "else" block in this function.
            // solhint-disable avoid-low-level-calls
            // slither-disable-next-line missing-zero-check,low-level-calls
            (bool success, bytes memory returnData) = address(this).call(functionCallEncoded);
            // solhint-enable avoid-low-level-calls

            // If the recursive call is successful, it means an unintended code path was taken.
            if (success) {
                revert Errors.UnreachableError();
            }

            bytes4 sharesAmountSig = bytes4(keccak256("SharesAndAssetsReceived(uint256,uint256)"));

            // Extract the error signature (first 4 bytes) from the revert reason.
            bytes4 errorSignature;
            // solhint-disable no-inline-assembly
            assembly {
                errorSignature := mload(add(returnData, 0x20))
            }

            // If the error matches the expected signature, extract the amount from the revert reason and return.
            if (errorSignature == sharesAmountSig) {
                // Extract subsequent bytes for uint256.
                assembly {
                    assetsAmount := mload(add(returnData, 0x24))
                    sharesAmount := mload(add(returnData, 0x44))
                }
            } else {
                // If the error is not the expected one, forward the original revert reason.
                assembly {
                    revert(add(32, returnData), mload(returnData))
                }
            }
            // solhint-enable no-inline-assembly
        }
        // This branch is taken during the recursive call.
        else {
            // Perform the actual withdrawal or redeem logic to compute the amount. This will be reverted to
            // simulate the action.
            uint256 previewAssets;
            uint256 previewShares;
            if (previewWithdraw) {
                (previewAssets, previewShares,) =
                    withdraw(assets, applicableTotalAssets, assetBreakdown, withdrawalQueue, destinationInfo);
            } else {
                (previewAssets, previewShares,) =
                    redeem(assets, applicableTotalAssets, assetBreakdown, withdrawalQueue, destinationInfo);
            }

            // Revert with the computed amount as an error.
            revert SharesAndAssetsReceived(previewAssets, previewShares);
        }
    }
}

// SPDX-License-Identifier: UNLICENSED
// Copyright (c) 2023 Tokemak Foundation. All rights reserved.

pragma solidity 0.8.17;

import { ECDSA } from "openzeppelin-contracts/utils/cryptography/ECDSA.sol";
import { IERC20Permit } from "openzeppelin-contracts/token/ERC20/extensions/draft-IERC20Permit.sol";

/// @notice ERC20 token functionality converted into a library. Based on OZ's v5
/// https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v5.0.1/contracts/token/ERC20/ERC20.sol
library AutopoolToken {
    struct TokenData {
        /// @notice Token balances
        /// @dev account => balance
        mapping(address => uint256) balances;
        /// @notice Account spender allowances
        /// @dev account => spender => allowance
        mapping(address => mapping(address => uint256)) allowances;
        /// @notice Total supply of the pool. Be careful when using this directly from the struct. The pool itself
        /// modifies this number based on unlocked profited shares
        uint256 totalSupply;
        /// @notice ERC20 Permit nonces
        /// @dev account -> nonce. Exposed via `nonces(owner)`
        mapping(address => uint256) nonces;
    }

    /// @notice EIP2612 permit type hash
    bytes32 public constant PERMIT_TYPEHASH =
        keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)");

    /// @notice EIP712 domain type hash
    bytes32 public constant TYPE_HASH =
        keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)");

    /// @dev Indicates an error related to the current `balance` of a `sender`. Used in transfers.
    /// @param sender Address whose tokens are being transferred.
    /// @param balance Current balance for the interacting account.
    /// @param needed Minimum amount required to perform a transfer.
    error ERC20InsufficientBalance(address sender, uint256 balance, uint256 needed);

    /// @dev Indicates a failure with the token `sender`. Used in transfers.
    /// @param sender Address whose tokens are being transferred.
    error ERC20InvalidSender(address sender);

    /// @dev Indicates a failure with the token `receiver`. Used in transfers.
    /// @param receiver Address to which tokens are being transferred.
    error ERC20InvalidReceiver(address receiver);

    /// @dev Indicates a failure with the `spender`’s `allowance`. Used in transfers.
    ///@param spender Address that may be allowed to operate on tokens without being their owner.
    /// @param allowance Amount of tokens a `spender` is allowed to operate with.
    ///@param needed Minimum amount required to perform a transfer.
    error ERC20InsufficientAllowance(address spender, uint256 allowance, uint256 needed);

    /// @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.
    /// @param approver Address initiating an approval operation.
    error ERC20InvalidApprover(address approver);

    /// @dev Indicates a failure with the `spender` to be approved. Used in approvals.
    /// @param spender Address that may be allowed to operate on tokens without being their owner.
    error ERC20InvalidSpender(address spender);

    /// @dev Permit deadline has expired.
    error ERC2612ExpiredSignature(uint256 deadline);
    /// @dev Mismatched signature.
    error ERC2612InvalidSigner(address signer, address owner);
    /// @dev The nonce used for an `account` is not the expected current nonce.
    error InvalidAccountNonce(address account, uint256 currentNonce);

    /// @dev Emitted when `value` tokens are moved from one account `from` to another `to`.
    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 Sets a `value` amount of tokens as the allowance of `spender` over the caller's tokens.
    function approve(TokenData storage data, address spender, uint256 value) external returns (bool) {
        address owner = msg.sender;
        approve(data, owner, spender, value);
        return true;
    }

    /// @dev Sets `value` as the allowance of `spender` over the `owner` s tokens.
    function approve(TokenData storage data, address owner, address spender, uint256 value) public {
        _approve(data, owner, spender, value, true);
    }

    function transfer(TokenData storage data, address to, uint256 value) external returns (bool) {
        address owner = msg.sender;
        _transfer(data, owner, to, value);
        return true;
    }

    /// @dev Moves a `value` amount of tokens from `from` to `to` using the allowance mechanism.
    /// value` is then deducted from the caller's allowance.
    function transferFrom(TokenData storage data, address from, address to, uint256 value) external returns (bool) {
        address spender = msg.sender;
        _spendAllowance(data, from, spender, value);
        _transfer(data, from, to, value);
        return true;
    }

    /// @dev Creates a `value` amount of tokens and assigns them to `account`, by transferring it from address(0).
    function mint(TokenData storage data, address account, uint256 value) external {
        if (account == address(0)) {
            revert ERC20InvalidReceiver(address(0));
        }
        _update(data, address(0), account, value);
    }

    /// @dev Destroys a `value` amount of tokens from `account`, lowering the total supply.
    function burn(TokenData storage data, address account, uint256 value) external {
        if (account == address(0)) {
            revert ERC20InvalidSender(address(0));
        }
        _update(data, account, address(0), value);
    }

    function permit(
        TokenData storage data,
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external {
        if (block.timestamp > deadline) {
            revert ERC2612ExpiredSignature(deadline);
        }

        uint256 nonce;
        // For each account, the nonce has an initial value of 0, can only be incremented by one, and cannot be
        // decremented or reset. This guarantees that the nonce never overflows.
        unchecked {
            // It is important to do x++ and not ++x here. Nonces starts at 0
            nonce = data.nonces[owner]++;
        }

        bytes32 structHash = keccak256(abi.encode(PERMIT_TYPEHASH, owner, spender, value, nonce, deadline));

        bytes32 hash = ECDSA.toTypedDataHash(IERC20Permit(address(this)).DOMAIN_SEPARATOR(), structHash);

        address signer = ECDSA.recover(hash, v, r, s);
        if (signer != owner) {
            revert ERC2612InvalidSigner(signer, owner);
        }

        approve(data, owner, spender, value);
    }

    /// @dev Moves a `value` amount of tokens from `from` to `to`.
    function _transfer(TokenData storage data, address from, address to, uint256 value) private {
        if (from == address(0)) {
            revert ERC20InvalidSender(address(0));
        }
        if (to == address(0)) {
            revert ERC20InvalidReceiver(address(0));
        }
        _update(data, from, to, value);
    }

    /// @dev Updates `owner` s allowance for `spender` based on spent `value`.
    function _spendAllowance(TokenData storage data, address owner, address spender, uint256 value) private {
        uint256 currentAllowance = data.allowances[owner][spender];
        if (currentAllowance != type(uint256).max) {
            if (currentAllowance < value) {
                revert ERC20InsufficientAllowance(spender, currentAllowance, value);
            }
            unchecked {
                _approve(data, owner, spender, currentAllowance - value, false);
            }
        }
    }

    /// @dev Transfers a `value` amount of tokens from `from` to `to`, or alternatively mints (or burns) if `from`
    /// (or `to`) is the zero address.
    function _update(TokenData storage data, address from, address to, uint256 value) private {
        if (from == address(0)) {
            // Overflow check required: The rest of the code assumes that totalSupply never overflows
            data.totalSupply += value;
        } else {
            uint256 fromBalance = data.balances[from];
            if (fromBalance < value) {
                revert ERC20InsufficientBalance(from, fromBalance, value);
            }
            unchecked {
                // Overflow not possible: value <= fromBalance <= totalSupply.
                data.balances[from] = fromBalance - value;
            }
        }

        if (to == address(0)) {
            unchecked {
                // Overflow not possible: value <= totalSupply or value <= fromBalance <= totalSupply.
                data.totalSupply -= value;
            }
        } else {
            unchecked {
                // Overflow not possible: balance + value is at most totalSupply, which we know fits into a uint256.
                data.balances[to] += value;
            }
        }

        emit Transfer(from, to, value);
    }

    /// @dev Variant of `_approve` with an optional flag to enable or disable the Approval event.
    function _approve(TokenData storage data, address owner, address spender, uint256 value, bool emitEvent) private {
        if (owner == address(0)) {
            revert ERC20InvalidApprover(address(0));
        }
        if (spender == address(0)) {
            revert ERC20InvalidSpender(address(0));
        }
        data.allowances[owner][spender] = value;
        if (emitEvent) {
            emit Approval(owner, spender, value);
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (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 // Deprecated in v4.8
    }

    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");
        }
    }

    /**
     * @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) {
        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 {
            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 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 (last updated v4.8.0) (utils/structs/EnumerableSet.sol)
// This file was procedurally generated from scripts/generate/templates/EnumerableSet.js.

pragma solidity ^0.8.0;

/**
 * @dev Library for managing
 * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
 * types.
 *
 * Sets have the following properties:
 *
 * - Elements are added, removed, and checked for existence in constant time
 * (O(1)).
 * - Elements are enumerated in O(n). No guarantees are made on the ordering.
 *
 * ```
 * contract Example {
 *     // Add the library methods
 *     using EnumerableSet for EnumerableSet.AddressSet;
 *
 *     // Declare a set state variable
 *     EnumerableSet.AddressSet private mySet;
 * }
 * ```
 *
 * As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`)
 * and `uint256` (`UintSet`) are supported.
 *
 * [WARNING]
 * ====
 * Trying to delete such a structure from storage will likely result in data corruption, rendering the structure
 * unusable.
 * See https://github.com/ethereum/solidity/pull/11843[ethereum/solidity#11843] for more info.
 *
 * In order to clean an EnumerableSet, you can either remove all elements one by one or create a fresh instance using an
 * array of EnumerableSet.
 * ====
 */
library EnumerableSet {
    // To implement this library for multiple types with as little code
    // repetition as possible, we write it in terms of a generic Set type with
    // bytes32 values.
    // The Set implementation uses private functions, and user-facing
    // implementations (such as AddressSet) are just wrappers around the
    // underlying Set.
    // This means that we can only create new EnumerableSets for types that fit
    // in bytes32.

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

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

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

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

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

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

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

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

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

            return true;
        } else {
            return false;
        }
    }

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

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

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

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

    // Bytes32Set

    struct Bytes32Set {
        Set _inner;
    }

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

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

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

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

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

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

        /// @solidity memory-safe-assembly
        assembly {
            result := store
        }

        return result;
    }

    // AddressSet

    struct AddressSet {
        Set _inner;
    }

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

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

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

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

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

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

        /// @solidity memory-safe-assembly
        assembly {
            result := store
        }

        return result;
    }

    // UintSet

    struct UintSet {
        Set _inner;
    }

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

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

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

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

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

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

        /// @solidity memory-safe-assembly
        assembly {
            result := store
        }

        return result;
    }
}

// SPDX-License-Identifier: UNLICENSED
// Copyright (c) 2023 Tokemak Foundation. All rights reserved.
pragma solidity 0.8.17;

import { Address } from "openzeppelin-contracts/utils/Address.sol";

library Errors {
    using Address for address;
    ///////////////////////////////////////////////////////////////////
    //                       Set errors
    ///////////////////////////////////////////////////////////////////

    error AccessDenied();
    error ZeroAddress(string paramName);
    error ZeroAmount();
    error InsufficientBalance(address token);
    error AssetNotAllowed(address token);
    error NotImplemented();
    error InvalidAddress(address addr);
    error InvalidParam(string paramName);
    error InvalidParams();
    error UnsafePrice(address token, uint256 spotPrice, uint256 safePrice);
    error AlreadySet(string param);
    error AlreadyRegistered(address param);
    error SlippageExceeded(uint256 expected, uint256 actual);
    error ArrayLengthMismatch(uint256 length1, uint256 length2, string details);

    error ItemNotFound();
    error ItemExists();
    error MissingRole(bytes32 role, address user);
    error RegistryItemMissing(string item);
    error NotRegistered();
    // Used to check storage slot is empty before setting.
    error MustBeZero();
    // Used to check storage slot set before deleting.
    error MustBeSet();

    error ApprovalFailed(address token);
    error FlashLoanFailed(address token, uint256 amount);

    error SystemMismatch(address source1, address source2);

    error InvalidToken(address token);
    error UnreachableError();

    error InvalidSigner(address signer);

    error InvalidChainId(uint256 chainId);

    error SenderMismatch(address recipient, address sender);

    function verifyNotZero(address addr, string memory paramName) internal pure {
        if (addr == address(0)) {
            revert ZeroAddress(paramName);
        }
    }

    function verifyNotZero(bytes32 key, string memory paramName) internal pure {
        if (key == bytes32(0)) {
            revert InvalidParam(paramName);
        }
    }

    function verifyNotEmpty(string memory val, string memory paramName) internal pure {
        if (bytes(val).length == 0) {
            revert InvalidParam(paramName);
        }
    }

    function verifyNotZero(uint256 num, string memory paramName) internal pure {
        if (num == 0) {
            revert InvalidParam(paramName);
        }
    }

    function verifySystemsMatch(address component1, address component2) internal view {
        bytes memory call = abi.encodeWithSignature("getSystemRegistry()");

        address registry1 = abi.decode(component1.functionStaticCall(call), (address));
        address registry2 = abi.decode(component2.functionStaticCall(call), (address));

        if (registry1 != registry2) {
            revert SystemMismatch(component1, component2);
        }
    }

    function verifyArrayLengths(uint256 length1, uint256 length2, string memory details) internal pure {
        if (length1 != length2) {
            revert ArrayLengthMismatch(length1, length2, details);
        }
    }
}

// SPDX-License-Identifier: UNLICENSED
// Copyright (c) 2023 Tokemak Foundation. All rights reserved.
pragma solidity 0.8.17;

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

interface IAccToke {
    ///////////////////////////////////////////////////////////////////
    //                        Variables
    ///////////////////////////////////////////////////////////////////

    function startEpoch() external view returns (uint256);
    function minStakeDuration() external view returns (uint256);

    struct Lockup {
        uint128 amount;
        uint128 end;
        uint256 points;
    }

    function getLockups(address user) external view returns (Lockup[] memory);
    function toke() external view returns (IERC20Metadata);

    ///////////////////////////////////////////////////////////////////
    //                        Errors
    ///////////////////////////////////////////////////////////////////

    error ZeroAddress();
    error StakingDurationTooShort();
    error StakingDurationTooLong();
    error StakingPointsExceeded();
    error IncorrectStakingAmount();
    error InsufficientFunds();
    error LockupDoesNotExist();
    error NotUnlockableYet();
    error AlreadyUnlocked();
    error ExtendDurationTooShort();
    error TransfersDisabled();
    error TransferFailed();
    error NoRewardsToClaim();
    error InsufficientAmount();
    error InvalidLockupIds();
    error InvalidDurationLength();

    ///////////////////////////////////////////////////////////////////
    //                        Events
    ///////////////////////////////////////////////////////////////////
    event SetMaxStakeDuration(uint256 oldDuration, uint256 newDuration);
    event Stake(address indexed user, uint256 lockupId, uint256 amount, uint256 end, uint256 points);
    event Unstake(address indexed user, uint256 lockupId, uint256 amount, uint256 end, uint256 points);
    event Extend(
        address indexed user,
        uint256 lockupId,
        uint256 amount,
        uint256 oldEnd,
        uint256 newEnd,
        uint256 oldPoints,
        uint256 newPoints
    );
    event RewardsAdded(uint256 amount, uint256 accRewardPerShare);
    event RewardsCollected(address indexed user, uint256 amount);
    event RewardsClaimed(address indexed user, uint256 amount);

    ///////////////////////////////////////////////////////////////////
    //
    //                        Staking Methods
    //
    ///////////////////////////////////////////////////////////////////

    /**
     * @notice Stake TOKE to an address that may not be the same as the sender of the funds. This can be used to give
     * staked funds to someone else.
     *
     * If staking before the start of staking (epoch), then the lockup start and end dates are shifted forward so that
     * the lockup starts at the epoch.
     *
     * @param amount TOKE to lockup in the stake
     * @param duration in seconds for the stake
     * @param to address to receive ownership of the stake
     */
    function stake(uint256 amount, uint256 duration, address to) external;

    /**
     * @notice Stake TOKE
     *
     * If staking before the start of staking (epoch), then the lockup start and end dates are shifted forward so that
     * the lockup starts at the epoch.
     *
     * @notice Stake TOKE for myself.
     * @param amount TOKE to lockup in the stake
     * @param duration in seconds for the stake
     */
    function stake(uint256 amount, uint256 duration) external;

    /**
     * @notice Collect staked TOKE for a lockup and any earned rewards.
     * @param lockupIds the id of the lockup to unstake
     */
    function unstake(uint256[] memory lockupIds) external;

    /**
     * @notice Extend a stake lockup for additional points.
     *
     * The stake end time is computed from the current time + duration, just like it is for new stakes. So a new stake
     * for seven days duration and an old stake extended with a seven days duration would have the same end.
     *
     * If an extend is made before the start of staking, the start time for the new stake is shifted forwards to the
     * start of staking, which also shifts forward the end date.
     *
     * @param lockupIds the id of the old lockup to extend
     * @param durations number of seconds from now to stake for
     */
    function extend(uint256[] memory lockupIds, uint256[] memory durations) external;

    ///////////////////////////////////////////////////////////////////
    //
    //                        Rewards
    //
    ///////////////////////////////////////////////////////////////////

    /// @notice The total amount of rewards earned for all stakes
    function totalRewardsEarned() external returns (uint256);

    /// @notice Total rewards claimed by all stakers
    function totalRewardsClaimed() external returns (uint256);

    /// @notice Rewards claimed by a specific wallet
    /// @param user Address of the wallet to check
    function rewardsClaimed(address user) external returns (uint256);

    /**
     * @notice Preview the number of points that would be returned for the
     * given amount and duration.
     *
     * @param amount TOKE to be staked
     * @param duration number of seconds to stake for
     * @return points staking points that would be returned
     * @return end staking period end date
     */
    function previewPoints(uint256 amount, uint256 duration) external view returns (uint256, uint256);

    /// @notice Preview the reward amount a caller can claim
    function previewRewards() external view returns (uint256);

    /// @notice Preview the reward amount a specified wallet can claim
    function previewRewards(address user) external view returns (uint256);

    /// @notice Claim rewards for the caller
    function collectRewards() external returns (uint256);

    /// @notice Check if amount can be staked
    function isStakeableAmount(uint256 amount) external pure returns (bool);
}

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

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

pragma solidity ^0.8.0;

import "./IAccessControl.sol";

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

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

// SPDX-License-Identifier: UNLICENSED
// Copyright (c) 2023 Tokemak Foundation. All rights reserved.
pragma solidity 0.8.17;

import { IAccessControlEnumerable } from "openzeppelin-contracts/access/IAccessControlEnumerable.sol";

interface IAccessController is IAccessControlEnumerable {
    error AccessDenied();

    /**
     * @notice Setup a role for an account
     * @param role The role to setup
     * @param account The account to setup the role for
     */
    function setupRole(bytes32 role, address account) external;

    /**
     * @notice Verify if an account is an owner. Reverts if not
     * @param account The account to verify
     */
    function verifyOwner(address account) external view;
}

// SPDX-License-Identifier: UNLICENSED
// Copyright (c) 2023 Tokemak Foundation. All rights reserved.
pragma solidity 0.8.17;

struct SwapParams {
    /// @dev The address of the token to be sold.
    address sellTokenAddress;
    /// @dev The amount of tokens to be sold.
    uint256 sellAmount;
    /// @dev The address of the token to be bought.
    address buyTokenAddress;
    /// @dev The expected minimum amount of tokens to be bought.
    uint256 buyAmount;
    /// @dev Data payload to be used for complex swap operations.
    bytes data;
    /// @dev Extra data payload reserved for future development. This field allows for additional information
    /// or functionality to be added without changing the struct and interface.
    bytes extraData;
}

interface IAsyncSwapper {
    error TokenAddressZero();
    error SwapFailed();
    error InsufficientBuyAmountReceived(uint256 buyTokenAmountReceived, uint256 buyAmount);
    error InsufficientSellAmount();
    error InsufficientBuyAmount();
    error InsufficientBalance(uint256 balanceNeeded, uint256 balanceAvailable);

    event Swapped(
        address indexed sellTokenAddress,
        address indexed buyTokenAddress,
        uint256 sellAmount,
        uint256 buyAmount,
        uint256 buyTokenAmountReceived
    );

    /**
     * @notice Swaps sellToken for buyToken
     * @param swapParams Encoded swap data
     * @return buyTokenAmountReceived The amount of buyToken received from the swap
     */
    function swap(SwapParams memory swapParams) external returns (uint256 buyTokenAmountReceived);
}

// SPDX-License-Identifier: UNLICENSED
// Copyright (c) 2023 Tokemak Foundation. All rights reserved.
pragma solidity 0.8.17;

interface IAsyncSwapperRegistry {
    event SwapperAdded(address indexed item);
    event SwapperRemoved(address indexed item);

    /// @notice Registers an item
    /// @param item Item address to be added
    function register(address item) external;

    /// @notice Removes item registration
    /// @param item Item address to be removed
    function unregister(address item) external;

    /// @notice Returns a list of all registered items
    function list() external view returns (address[] memory);

    /// @notice Checks if an address is a valid item
    /// @param item Item address to be checked
    function isRegistered(address item) external view returns (bool);

    /// @notice Checks if an address is a valid swapper and reverts if not
    /// @param item Swapper address to be checked
    function verifyIsRegistered(address item) external view;
}

// SPDX-License-Identifier: UNLICENSED
// Copyright (c) 2023 Tokemak Foundation. All rights reserved.
pragma solidity 0.8.17;

import { IAutopool } from "src/interfaces/vault/IAutopool.sol";
import { IAutopilotRouterBase } from "src/interfaces/vault/IAutopilotRouterBase.sol";
import { IRewards } from "src/interfaces/rewarders/IRewards.sol";
import { SwapParams } from "src/interfaces/liquidation/IAsyncSwapper.sol";

/**
 * @title IAutopilotRouter Interface
 * @notice Extends the IAutopilotRouterBase with specific flows to save gas
 */
interface IAutopilotRouter is IAutopilotRouterBase {
    /**
     * ***************************   Deposit ********************************
     */

    /**
     * @notice deposit available asset balance to a AutopoolETH.
     * @param vault The AutopoolETH to deposit assets to.
     * @param to The destination of ownership shares.
     * @param minSharesOut The min amount of `vault` shares received by `to`.
     * @return sharesOut the amount of shares received by `to`.
     * @dev throws MinSharesError
     */
    function depositBalance(IAutopool vault, address to, uint256 minSharesOut) external returns (uint256 sharesOut);

    /**
     * @notice deposit max assets to a AutopoolETH.
     * @param vault The AutopoolETH to deposit assets to.
     * @param to The destination of ownership shares.
     * @param minSharesOut The min amount of `vault` shares received by `to`.
     * @return sharesOut the amount of shares received by `to`.
     * @dev throws MinSharesError
     */
    function depositMax(IAutopool vault, address to, uint256 minSharesOut) external returns (uint256 sharesOut);

    /**
     * *************************   Withdraw   **********************************
     */

    /**
     * @notice withdraw `amount` to a AutopoolETH.
     * @param fromVault The AutopoolETH to withdraw assets from.
     * @param toVault The AutopoolETH to deposit assets to.
     * @param to The destination of ownership shares.
     * @param amount The amount of assets to withdraw from fromVault.
     * @param maxSharesIn The max amount of fromVault shares withdrawn by caller.
     * @param minSharesOut The min amount of toVault shares received by `to`.
     * @return sharesOut the amount of shares received by `to`.
     * @dev throws MaxSharesError, MinSharesError
     */
    function withdrawToDeposit(
        IAutopool fromVault,
        IAutopool toVault,
        address to,
        uint256 amount,
        uint256 maxSharesIn,
        uint256 minSharesOut
    ) external returns (uint256 sharesOut);

    /**
     * *************************   Redeem    ********************************
     */

    /**
     * @notice redeem `shares` to a AutopoolETH.
     * @param fromVault The AutopoolETH to redeem shares from.
     * @param toVault The AutopoolETH to deposit assets to.
     * @param to The destination of ownership shares.
     * @param shares The amount of shares to redeem from fromVault.
     * @param minSharesOut The min amount of toVault shares received by `to`.
     * @return sharesOut the amount of shares received by `to`.
     * @dev throws MinAmountError, MinSharesError
     */
    function redeemToDeposit(
        IAutopool fromVault,
        IAutopool toVault,
        address to,
        uint256 shares,
        uint256 minSharesOut
    ) external returns (uint256 sharesOut);

    /**
     * @notice redeem max shares to a AutopoolETH.
     * @param vault The AutopoolETH to redeem shares from.
     * @param to The destination of assets.
     * @param minAmountOut The min amount of assets received by `to`.
     * @return amountOut the amount of assets received by `to`.
     * @dev throws MinAmountError
     */
    function redeemMax(IAutopool vault, address to, uint256 minAmountOut) external returns (uint256 amountOut);

    /**
     * @notice swaps token
     * @param swapper Address of the swapper to use
     * @param swapParams  Parameters for the swap
     * @return amountReceived Swap output amount
     */
    function swapToken(address swapper, SwapParams memory swapParams) external returns (uint256 amountReceived);

    /**
     * @notice claims vault token rewards
     * @param rewarder Address of the rewarder to claim from
     * @param recipient Struct containing recipient details
     * @return amountReceived Swap output amount
     */
    function claimRewards(
        IRewards rewarder,
        IRewards.Recipient calldata recipient,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external returns (uint256);
}

// SPDX-License-Identifier: UNLICENSED
// Copyright (c) 2023 Tokemak Foundation. All rights reserved.
pragma solidity >=0.8.7;

import { IAutopool } from "src/interfaces/vault/IAutopool.sol";
import { IMainRewarder } from "src/interfaces/rewarders/IMainRewarder.sol";
import { IERC20 } from "openzeppelin-contracts/token/ERC20/IERC20.sol";

/**
 * @title AutopoolETH Router Base Interface
 * @notice A canonical router between AutopoolETHs
 *
 * The base router is a multicall style router inspired by Uniswap v3 with built-in features for permit,
 * WETH9 wrap/unwrap, and ERC20 token pulling/sweeping/approving. It includes methods for the four mutable
 * ERC4626 functions deposit/mint/withdraw/redeem as well.
 *
 * These can all be arbitrarily composed using the multicall functionality of the router.
 *
 * NOTE the router is capable of pulling any approved token from your wallet. This is only possible when
 * your address is msg.sender, but regardless be careful when interacting with the router or ERC4626 Vaults.
 * The router makes no special considerations for unique ERC20 implementations such as fee on transfer.
 * There are no built in protections for unexpected behavior beyond enforcing the minSharesOut is received.
 */
interface IAutopilotRouterBase {
    /// @notice thrown when amount of assets received is below the min set by caller
    error MinAmountError();

    /// @notice thrown when amount of shares received is below the min set by caller
    error MinSharesError();

    /// @notice thrown when amount of assets received is above the max set by caller
    error MaxAmountError();

    /// @notice thrown when amount of shares received is above the max set by caller
    error MaxSharesError();

    /**
     * @notice mint `shares` from an ERC4626 vault.
     * @param vault The AutopoolETH to mint shares from.
     * @param to The destination of ownership shares.
     * @param shares The amount of shares to mint from `vault`.
     * @param maxAmountIn The max amount of assets used to mint.
     * @return amountIn the amount of assets used to mint by `to`.
     * @dev throws MaxAmountError
     */
    function mint(
        IAutopool vault,
        address to,
        uint256 shares,
        uint256 maxAmountIn
    ) external payable returns (uint256 amountIn);

    /**
     * @notice deposit `amount` to an ERC4626 vault.
     * @param vault The AutopoolETH to deposit assets to.
     * @param to The destination of ownership shares.
     * @param amount The amount of assets to deposit to `vault`.
     * @param minSharesOut The min amount of `vault` shares received by `to`.
     * @return sharesOut the amount of shares received by `to`.
     * @dev throws MinSharesError
     */
    function deposit(
        IAutopool vault,
        address to,
        uint256 amount,
        uint256 minSharesOut
    ) external payable returns (uint256 sharesOut);

    /**
     * @notice withdraw `amount` from an ERC4626 vault.
     * @param vault The AutopoolETH to withdraw assets from.
     * @param to The destination of assets.
     * @param amount The amount of assets to withdraw from vault.
     * @param maxSharesOut The max amount of shares burned for assets requested.
     * @return sharesOut the amount of shares received by `to`.
     * @dev throws MaxSharesError
     */
    function withdraw(
        IAutopool vault,
        address to,
        uint256 amount,
        uint256 maxSharesOut
    ) external payable returns (uint256 sharesOut);

    /**
     * @notice redeem `shares` shares from a AutopoolETH
     * @param vault The AutopoolETH to redeem shares from.
     * @param to The destination of assets.
     * @param shares The amount of shares to redeem from vault.
     * @param minAmountOut The min amount of assets received by `to`.
     * @return amountOut the amount of assets received by `to`.
     * @dev throws MinAmountError
     */
    function redeem(
        IAutopool vault,
        address to,
        uint256 shares,
        uint256 minAmountOut
    ) external payable returns (uint256 amountOut);

    /// @notice Stakes vault token to corresponding rewarder.
    /// @param vault IERC20 instance of an Autopool to stake to.
    /// @param maxAmount Maximum amount for user to stake.  Amount > balanceOf(user) will stake all present tokens.
    /// @return staked Returns total amount staked.
    function stakeVaultToken(IERC20 vault, uint256 maxAmount) external returns (uint256 staked);

    /// @notice Unstakes vault token from corresponding rewarder.
    /// @param vault IAutopool instance of the vault token to withdraw.
    /// @param rewarder Rewarder to withdraw from.
    /// @param maxAmount Amount of vault token to withdraw Amount > balanceOf(user) will withdraw all owned tokens.
    /// @param claim Claiming rewards or not on unstaking.
    /// @return withdrawn Amount of vault token withdrawn.
    function withdrawVaultToken(
        IAutopool vault,
        IMainRewarder rewarder,
        uint256 maxAmount,
        bool claim
    ) external returns (uint256 withdrawn);

    /// @notice Claims rewards on user stake of vault token.
    /// @param vault IAutopool instance of vault token to claim rewards for.
    /// @param rewarder Rewarder to claim rewards from.
    function claimAutopoolRewards(IAutopool vault, IMainRewarder rewarder) external;
}

// SPDX-License-Identifier: UNLICENSED
// Copyright (c) 2023 Tokemak Foundation. All rights reserved.
pragma solidity 0.8.17;

import { AutopoolDebt } from "src/vault/libs/AutopoolDebt.sol";
import { IERC4626 } from "src/interfaces/vault/IERC4626.sol";
import { Math } from "openzeppelin-contracts/utils/math/Math.sol";
import { IAutopoolStrategy } from "src/interfaces/strategy/IAutopoolStrategy.sol";
import { IMainRewarder } from "src/interfaces/rewarders/IMainRewarder.sol";
import { IERC20Permit } from "openzeppelin-contracts/token/ERC20/extensions/draft-IERC20Permit.sol";

interface IAutopool is IERC4626, IERC20Permit {
    enum VaultShutdownStatus {
        Active,
        Deprecated,
        Exploit
    }

    /// @param unlockPeriodInSeconds Time it takes for profit to unlock in seconds
    /// @param fullProfitUnlockTime Time at which all profit will have been unlocked
    /// @param lastProfitUnlockTime Last time profits were unlocked
    /// @param profitUnlockRate Per second rate at which profit shares unlocks. Rate when calculated is denominated in
    /// MAX_BPS_PROFIT. TODO: Get into uint112
    struct ProfitUnlockSettings {
        uint48 unlockPeriodInSeconds;
        uint48 fullProfitUnlockTime;
        uint48 lastProfitUnlockTime;
        uint256 profitUnlockRate;
    }

    /// @param feeSink Where claimed fees are sent
    /// @param totalAssetsHighMark The last totalAssets amount we took fees at
    /// @param totalAssetsHighMarkTimestamp The last timestamp we updated the high water mark
    /// @param lastPeriodicFeeTake Timestamp of when the last periodic fee was taken.
    /// @param periodicFeeSink Address that receives periodic fee.
    /// @param periodicFeeBps Current periodic fee.  100% == 10000.
    /// @param streamingFeeBps Current streaming fee taken on profit. 100% == 10000
    /// @param navPerShareLastFeeMark The last nav/share height we took fees at
    /// @param navPerShareLastFeeMarkTimestamp The last timestamp we took fees at
    /// @param rebalanceFeeHighWaterMarkEnabled Returns whether the nav/share high water mark is enabled for the
    /// rebalance fee
    struct AutopoolFeeSettings {
        address feeSink;
        uint256 totalAssetsHighMark;
        uint256 totalAssetsHighMarkTimestamp;
        uint256 lastPeriodicFeeTake;
        address periodicFeeSink;
        uint256 periodicFeeBps;
        uint256 streamingFeeBps;
        uint256 navPerShareLastFeeMark;
        uint256 navPerShareLastFeeMarkTimestamp;
        bool rebalanceFeeHighWaterMarkEnabled;
    }

    /// @param totalIdle The amount of baseAsset deposited into the contract pending deployment
    /// @param totalDebt The current (though cached) value of assets we've deployed
    /// @param totalDebtMin The current (though cached) value of assets we use for valuing during deposits
    /// @param totalDebtMax The current (though cached) value of assets we use for valuing during withdrawals
    struct AssetBreakdown {
        uint256 totalIdle;
        uint256 totalDebt;
        uint256 totalDebtMin;
        uint256 totalDebtMax;
    }

    enum TotalAssetPurpose {
        Global,
        Deposit,
        Withdraw
    }

    /* ******************************** */
    /*      Events                      */
    /* ******************************** */
    event TokensPulled(address[] tokens, uint256[] amounts, address[] destinations);
    event TokensRecovered(address[] tokens, uint256[] amounts, address[] destinations);
    event Nav(uint256 idle, uint256 debt, uint256 totalSupply);
    event RewarderSet(address newRewarder, address oldRewarder);
    event DestinationDebtReporting(address destination, uint256 debtValue, uint256 claimed, uint256 claimGasUsed);
    event FeeCollected(uint256 fees, address feeSink, uint256 mintedShares, uint256 profit, uint256 idle, uint256 debt);
    event PeriodicFeeCollected(uint256 fees, address feeSink, uint256 mintedShares);
    event Shutdown(VaultShutdownStatus reason);

    /* ******************************** */
    /*      Errors                      */
    /* ******************************** */

    error ERC4626MintExceedsMax(uint256 shares, uint256 maxMint);
    error ERC4626DepositExceedsMax(uint256 assets, uint256 maxDeposit);
    error ERC4626ExceededMaxWithdraw(address owner, uint256 assets, uint256 max);
    error ERC4626ExceededMaxRedeem(address owner, uint256 shares, uint256 max);
    error InvalidShutdownStatus(VaultShutdownStatus status);

    error WithdrawalFailed();
    error DepositFailed();
    error InsufficientFundsInDestinations(uint256 deficit);
    error WithdrawalIncomplete();
    error ValueSharesMismatch(uint256 value, uint256 shares);

    /// @notice A full unit of this pool
    // solhint-disable-next-line func-name-mixedcase
    function ONE() external view returns (uint256);

    /// @notice Query the type of vault
    function vaultType() external view returns (bytes32);

    /// @notice Strategy governing the pools rebalances
    function autoPoolStrategy() external view returns (IAutopoolStrategy);

    /// @notice Allow token recoverer to collect dust / unintended transfers (non-tracked assets only)
    function recover(address[] calldata tokens, uint256[] calldata amounts, address[] calldata destinations) external;

    /// @notice Set the order of destination vaults used for withdrawals
    // NOTE: will be done going directly to strategy (IStrategy) vault points to.
    //       How it'll delegate is still being decided
    // function setWithdrawalQueue(address[] calldata destinations) external;

    /// @notice Get a list of destination vaults with pending assets to clear out
    function getRemovalQueue() external view returns (address[] memory);

    function getFeeSettings() external view returns (AutopoolFeeSettings memory);

    /// @notice Initiate the shutdown procedures for this vault
    function shutdown(VaultShutdownStatus reason) external;

    /// @notice True if the vault has been shutdown
    function isShutdown() external view returns (bool);

    /// @notice Returns the reason for shutdown (or `Active` if not shutdown)
    function shutdownStatus() external view returns (VaultShutdownStatus);

    /// @notice gets the list of supported destination vaults for the Autopool/Strategy
    /// @return _destinations List of supported destination vaults
    function getDestinations() external view returns (address[] memory _destinations);

    function convertToShares(
        uint256 assets,
        uint256 totalAssetsForPurpose,
        uint256 supply,
        Math.Rounding rounding
    ) external view returns (uint256 shares);

    function convertToAssets(
        uint256 shares,
        uint256 totalAssetsForPurpose,
        uint256 supply,
        Math.Rounding rounding
    ) external view returns (uint256 assets);

    function totalAssets(TotalAssetPurpose purpose) external view returns (uint256);

    function getAssetBreakdown() external view returns (AssetBreakdown memory);

    /// @notice get a destinations last reported debt value
    /// @param destVault the address of the target destination
    /// @return destinations last reported debt value
    function getDestinationInfo(address destVault) external view returns (AutopoolDebt.DestinationInfo memory);

    /// @notice check if a destination is registered with the vault
    function isDestinationRegistered(address destination) external view returns (bool);

    /// @notice get if a destinationVault is queued for removal by the AutopoolETH
    function isDestinationQueuedForRemoval(address destination) external view returns (bool);

    /// @notice Returns instance of vault rewarder.
    function rewarder() external view returns (IMainRewarder);

    /// @notice Returns all past rewarders.
    function getPastRewarders() external view returns (address[] memory _pastRewarders);

    /// @notice Returns boolean telling whether address passed in is past rewarder.
    function isPastRewarder(address _pastRewarder) external view returns (bool);
}

// SPDX-License-Identifier: UNLICENSED
// Copyright (c) 2023 Tokemak Foundation. All rights reserved.
pragma solidity 0.8.17;

interface IAutopoolFactory {
    ///////////////////////////////////////////////////////////////////
    //                        Vault Creation
    ///////////////////////////////////////////////////////////////////

    /**
     * @notice Spin up a new AutopoolETH
     * @param strategy Strategy template address
     * @param symbolSuffix Symbol suffix of the new token
     * @param descPrefix Description prefix of the new token
     * @param salt Vault creation salt
     * @param extraParams Any extra data needed for the vault
     */
    function createVault(
        address strategy,
        string memory symbolSuffix,
        string memory descPrefix,
        bytes32 salt,
        bytes calldata extraParams
    ) external payable returns (address newVaultAddress);

    function addStrategyTemplate(address strategyTemplate) external;

    function removeStrategyTemplate(address strategyTemplate) external;
}

// SPDX-License-Identifier: UNLICENSED
// Copyright (c) 2023 Tokemak Foundation. All rights reserved.
pragma solidity 0.8.17;

/// @title Keep track of Vaults created through the Vault Factory
interface IAutopoolRegistry {
    ///////////////////////////////////////////////////////////////////
    //                        Errors
    ///////////////////////////////////////////////////////////////////

    error VaultNotFound(address vaultAddress);
    error VaultAlreadyExists(address vaultAddress);

    ///////////////////////////////////////////////////////////////////
    //                        Events
    ///////////////////////////////////////////////////////////////////
    event VaultAdded(address indexed asset, address indexed vault);
    event VaultRemoved(address indexed asset, address indexed vault);

    ///////////////////////////////////////////////////////////////////
    //                        Functions
    ///////////////////////////////////////////////////////////////////

    /// @notice Checks if an address is a valid vault
    /// @param vaultAddress Vault address to be added
    function isVault(address vaultAddress) external view returns (bool);

    /// @notice Registers a vault
    /// @param vaultAddress Vault address to be added
    function addVault(address vaultAddress) external;

    /// @notice Removes vault registration
    /// @param vaultAddress Vault address to be removed
    function removeVault(address vaultAddress) external;

    /// @notice Returns a list of all registered vaults
    function listVaults() external view returns (address[] memory);

    /// @notice Returns a list of all registered vaults for a given asset
    /// @param asset Asset address
    function listVaultsForAsset(address asset) external view returns (address[] memory);

    /// @notice Returns a list of all registered vaults for a given type
    /// @param _vaultType Vault type
    function listVaultsForType(bytes32 _vaultType) external view returns (address[] memory);
}

// SPDX-License-Identifier: UNLICENSED
// Copyright (c) 2023 Tokemak Foundation. All rights reserved.
pragma solidity 0.8.17;

import { IStrategy } from "src/interfaces/strategy/IStrategy.sol";

interface IAutopoolStrategy {
    enum RebalanceDirection {
        In,
        Out
    }

    /// @notice verify that a rebalance (swap between destinations) meets all the strategy constraints
    /// @dev Signature identical to IStrategy.verifyRebalance
    function verifyRebalance(
        IStrategy.RebalanceParams memory,
        IStrategy.SummaryStats memory
    ) external returns (bool, string memory message);

    /// @notice called by the Autopool when NAV is updated
    /// @dev can only be called by the strategy's registered Autopool
    /// @param navPerShare The navPerShare to record
    function navUpdate(uint256 navPerShare) external;

    /// @notice called by the Autopool when a rebalance is completed
    /// @dev can only be called by the strategy's registered Autopool
    /// @param rebalanceParams The parameters for the rebalance that was executed
    function rebalanceSuccessfullyExecuted(IStrategy.RebalanceParams memory rebalanceParams) external;

    /// @notice called by the Autopool during rebalance process
    /// @param rebalanceParams The parameters for the rebalance that was executed
    function getRebalanceOutSummaryStats(IStrategy.RebalanceParams memory rebalanceParams)
        external
        returns (IStrategy.SummaryStats memory outSummary);

    /// @notice the number of days to pause rebalancing due to NAV decay
    function pauseRebalancePeriodInDays() external view returns (uint16);

    /// @notice the number of seconds gap between consecutive rebalances
    function rebalanceTimeGapInSeconds() external view returns (uint256);

    /// @notice destinations trading a premium above maxPremium will be blocked from new capital deployments
    function maxPremium() external view returns (int256); // 100% = 1e18

    /// @notice destinations trading a discount above maxDiscount will be blocked from new capital deployments
    function maxDiscount() external view returns (int256); // 100% = 1e18

    /// @notice the allowed staleness of stats data before a revert occurs
    function staleDataToleranceInSeconds() external view returns (uint40);

    /// @notice the swap cost offset period to initialize the strategy with
    function swapCostOffsetInitInDays() external view returns (uint16);

    /// @notice the number of violations required to trigger a tightening of the swap cost offset period (1 to 10)
    function swapCostOffsetTightenThresholdInViolations() external view returns (uint16);

    /// @notice the number of days to decrease the swap offset period for each tightening step
    function swapCostOffsetTightenStepInDays() external view returns (uint16);

    /// @notice the number of days since a rebalance required to trigger a relaxing of the swap cost offset period
    function swapCostOffsetRelaxThresholdInDays() external view returns (uint16);

    /// @notice the number of days to increase the swap offset period for each relaxing step
    function swapCostOffsetRelaxStepInDays() external view returns (uint16);

    // slither-disable-start similar-names
    /// @notice the maximum the swap cost offset period can reach. This is the loosest the strategy will be
    function swapCostOffsetMaxInDays() external view returns (uint16);

    /// @notice the minimum the swap cost offset period can reach. This is the most conservative the strategy will be
    function swapCostOffsetMinInDays() external view returns (uint16);

    /// @notice the number of days for the first NAV decay comparison (e.g., 30 days)
    function navLookback1InDays() external view returns (uint8);

    /// @notice the number of days for the second NAV decay comparison (e.g., 60 days)
    function navLookback2InDays() external view returns (uint8);

    /// @notice the number of days for the third NAV decay comparison (e.g., 90 days)
    function navLookback3InDays() external view returns (uint8);
    // slither-disable-end similar-names

    /// @notice the maximum slippage that is allowed for a normal rebalance
    function maxNormalOperationSlippage() external view returns (uint256); // 100% = 1e18

    /// @notice the maximum amount of slippage to allow when a destination is trimmed due to constraint violations
    /// recommend setting this higher than maxNormalOperationSlippage
    function maxTrimOperationSlippage() external view returns (uint256); // 100% = 1e18

    /// @notice the maximum amount of slippage to allow when a destinationVault has been shutdown
    /// shutdown for a vault is abnormal and means there is an issue at that destination
    /// recommend setting this higher than maxNormalOperationSlippage
    function maxEmergencyOperationSlippage() external view returns (uint256); // 100% = 1e18

    /// @notice the maximum amount of slippage to allow when the Autopool has been shutdown
    function maxShutdownOperationSlippage() external view returns (uint256); // 100% = 1e18

    /// @notice the maximum discount used for price return
    function maxAllowedDiscount() external view returns (int256); // 18 precision

    /// @notice model weight used for LSTs base yield, 1e6 is the highest
    function weightBase() external view returns (uint256);

    /// @notice model weight used for DEX fee yield, 1e6 is the highest
    function weightFee() external view returns (uint256);

    /// @notice model weight used for incentive yield
    function weightIncentive() external view returns (uint256);

    /// @notice model weight used slashing costs
    function weightSlashing() external view returns (uint256);

    /// @notice model weight applied to an LST discount when exiting the position
    function weightPriceDiscountExit() external view returns (int256);

    /// @notice model weight applied to an LST discount when entering the position
    function weightPriceDiscountEnter() external view returns (int256);

    /// @notice model weight applied to an LST premium when entering or exiting the position
    function weightPricePremium() external view returns (int256);

    /// @notice initial value of the swap cost offset to use
    function swapCostOffsetInit() external view returns (uint16);

    /// @notice initial lst price gap tolerance
    function defaultLstPriceGapTolerance() external view returns (uint256);
}

// SPDX-License-Identifier: UNLICENSED
// Copyright (c) 2023 Tokemak Foundation. All rights reserved.
pragma solidity 0.8.17;

interface IBaseAssetVault {
    /// @notice Asset that this Vault primarily manages
    /// @dev Vault decimals should be the same as the baseAsset
    function baseAsset() external view returns (address);
}

// SPDX-License-Identifier: UNLICENSED
// Copyright (c) 2023 Tokemak Foundation. All rights reserved.
pragma solidity 0.8.17;

interface IBaseRewarder {
    event RewardAdded(
        uint256 reward,
        uint256 rewardRate,
        uint256 lastUpdateBlock,
        uint256 periodInBlockFinish,
        uint256 historicalRewards
    );
    event UserRewardUpdated(
        address indexed user, uint256 amount, uint256 rewardPerTokenStored, uint256 lastUpdateBlock
    );
    event Staked(address indexed user, uint256 amount);
    event Withdrawn(address indexed user, uint256 amount);
    event RewardPaid(address indexed user, uint256 reward);
    event QueuedRewardsUpdated(uint256 startingQueuedRewards, uint256 startingNewRewards, uint256 queuedRewards);
    event AddedToWhitelist(address indexed wallet);
    event RemovedFromWhitelist(address indexed wallet);

    event TokeLockDurationUpdated(uint256 newDuration);

    /**
     * @notice Claims and transfers all rewards for the specified account
     */
    function getReward() external;

    /**
     * @notice Stakes the specified amount of tokens for the specified account.
     * @param account The address of the account to stake tokens for.
     * @param amount The amount of tokens to stake.
     */
    function stake(address account, uint256 amount) external;

    /**
     * @notice Calculate the earned rewards for an account.
     * @param account Address of the account.
     * @return The earned rewards for the given account.
     */
    function earned(address account) external view returns (uint256);

    /**
     * @notice Calculates the rewards per token for the current block.
     * @dev The total amount of rewards available in the system is fixed, and it needs to be distributed among the users
     * based on their token balances and staking duration.
     * Rewards per token represent the amount of rewards that each token is entitled to receive at the current block.
     * The calculation takes into account the reward rate, the time duration since the last update,
     * and the total supply of tokens in the staking pool.
     * @return The updated rewards per token value for the current block.
     */
    function rewardPerToken() external view returns (uint256);

    /**
     * @notice Get the current reward rate per block.
     * @return The current reward rate per block.
     */
    function rewardRate() external view returns (uint256);

    /**
     * @notice Get the current TOKE lock duration.
     * @return The current TOKE lock duration.
     */
    function tokeLockDuration() external view returns (uint256);

    /**
     * @notice Get the last block where rewards are applicable.
     * @return The last block number where rewards are applicable.
     */
    function lastBlockRewardApplicable() external view returns (uint256);

    /**
     * @notice The total amount of tokens staked
     */
    function totalSupply() external view returns (uint256);

    /**
     * @notice The amount of tokens staked for the specified account
     * @param account The address of the account to get the balance of
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @notice Queue new rewards to be distributed.
     * @param newRewards The amount of new rewards to be queued.
     */
    function queueNewRewards(uint256 newRewards) external;

    /**
     * @notice Token distributed as rewards
     * @return reward token address
     */
    function rewardToken() external view returns (address);

    /**
     * @notice Add an address to the whitelist.
     * @param wallet The address to be added to the whitelist.
     */
    function addToWhitelist(address wallet) external;

    /**
     * @notice Remove an address from the whitelist.
     * @param wallet The address to be removed from the whitelist.
     */
    function removeFromWhitelist(address wallet) external;

    /**
     * @notice Check if an address is whitelisted.
     * @param wallet The address to be checked.
     * @return bool indicating if the address is whitelisted.
     */
    function isWhitelisted(address wallet) external view returns (bool);
}

// SPDX-License-Identifier: UNLICENSED
// Copyright (c) 2023 Tokemak Foundation. All rights reserved.

pragma solidity 0.8.17;

interface ICurveResolver {
    /// @notice Resolve details of a Curve pool regardless of type or version
    /// @dev This resolves tokens without unwrapping to underlying in the case of meta pools.
    /// @param poolAddress pool address to lookup
    /// @return tokens tokens that make up the pool
    /// @return numTokens the number of tokens. tokens are not unwrapped.
    /// @return isStableSwap is this a StableSwap pool. false = CryptoSwap
    function resolve(address poolAddress)
        external
        view
        returns (address[8] memory tokens, uint256 numTokens, bool isStableSwap);

    /// @notice Resolve details of a Curve pool regardless of type or version
    /// @dev This resolves tokens without unwrapping to underlying in the case of meta pools.
    /// @dev Use the isStableSwap value to differentiate between StableSwap (V1) and CryptoSwap (V2) pools.
    /// @param poolAddress pool address to lookup
    /// @return tokens tokens that make up the pool
    /// @return numTokens the number of tokens. tokens are not unwrapped
    /// @return lpToken lp token of the pool
    /// @return isStableSwap is this a StableSwap pool. false = CryptoSwap
    function resolveWithLpToken(address poolAddress)
        external
        view
        returns (address[8] memory tokens, uint256 numTokens, address lpToken, bool isStableSwap);

    /// @notice Get the lp token of a Curve pool
    /// @param poolAddress pool address to lookup
    function getLpToken(address poolAddress) external view returns (address);

    /// @notice Get the reserves of a Curve pools' tokens
    /// @dev Actual balances length might differ from 8 and should be verified by the caller
    /// @param poolAddress pool address to lookup
    /// @return balances reserves of the pool tokens
    function getReservesInfo(address poolAddress) external view returns (uint256[8] memory balances);
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.17;

/**
 * @title IDestinationAdapter
 * @dev This is a super-interface to unify different types of adapters to be registered in Destination Registry.
 *      Specific interface type is defined by extending from this interface.
 */
interface IDestinationAdapter {
    error MustBeMoreThanZero();
    error ArraysLengthMismatch();
    error BalanceMustIncrease();
    error MinLpAmountNotReached();
    error LpTokenAmountMismatch();
    error NoNonZeroAmountProvided();
    error InvalidBalanceChange();
    error InvalidAddress(address);
}

// SPDX-License-Identifier: UNLICENSED
// Copyright (c) 2023 Tokemak Foundation. All rights reserved.
pragma solidity 0.8.17;

import { IDestinationAdapter } from "src/interfaces/destinations/IDestinationAdapter.sol";

interface IDestinationRegistry {
    event Register(bytes32[] indexed destinationTypes, address[] indexed targets);
    event Replace(bytes32[] indexed destinationTypes, address[] indexed targets);
    event Unregister(bytes32[] indexed destinationTypes);

    event Whitelist(bytes32[] indexed destinationTypes);
    event RemoveFromWhitelist(bytes32[] indexed destinationTypes);

    error InvalidAddress(address addr);
    error NotAllowedDestination();
    error DestinationAlreadySet();

    /**
     * @notice Adds a new addresses of the given destination types
     * @dev Fails if trying to overwrite previous value of the same destination type
     * @param destinationTypes Ones from the destination type whitelist
     * @param targets addresses of the deployed DestinationAdapters, cannot be 0
     */
    function register(bytes32[] calldata destinationTypes, address[] calldata targets) external;

    /**
     * @notice Replaces an addresses of the given destination types
     * @dev Fails if given destination type was not set previously
     * @param destinationTypes Ones from the destination type whitelist
     * @param targets addresses of the deployed DestinationAdapters, cannot be 0
     */
    function replace(bytes32[] calldata destinationTypes, address[] calldata targets) external;

    /**
     * @notice Removes an addresses of the given pre-registered destination types
     * @param destinationTypes Ones from the destination types whitelist
     */
    function unregister(bytes32[] calldata destinationTypes) external;

    /**
     * @notice Gives an address of the given destination type
     * @dev Should revert on missing destination
     * @param destination One from the destination type whitelist
     */
    function getAdapter(bytes32 destination) external returns (IDestinationAdapter);

    /**
     * @notice Adds given destination types to the whitelist
     * @param destinationTypes Types to whitelist
     */
    function addToWhitelist(bytes32[] calldata destinationTypes) external;

    /**
     * @notice Removes given pre-whitelisted destination types
     * @param destinationTypes Ones from the destination type whitelist
     */
    function removeFromWhitelist(bytes32[] calldata destinationTypes) external;

    /**
     * @notice Checks if the given destination type is whitelisted
     * @param destinationType Type to verify
     */
    function isWhitelistedDestination(bytes32 destinationType) external view returns (bool);
}

// SPDX-License-Identifier: UNLICENSED
// Copyright (c) 2023 Tokemak Foundation. All rights reserved.
pragma solidity 0.8.17;

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

import { IBaseAssetVault } from "src/interfaces/vault/IBaseAssetVault.sol";
import { IMainRewarder } from "src/interfaces/rewarders/IMainRewarder.sol";
import { IDexLSTStats } from "src/interfaces/stats/IDexLSTStats.sol";

interface IDestinationVault is IBaseAssetVault, IERC20 {
    enum VaultShutdownStatus {
        Active,
        Deprecated,
        Exploit
    }

    error LogicDefect();
    error BaseAmountReceived(uint256 amount);

    /* ******************************** */
    /* View                             */
    /* ******************************** */

    /// @notice A full unit of this vault
    // solhint-disable-next-line func-name-mixedcase
    function ONE() external view returns (uint256);

    /// @notice The asset that is deposited into the vault
    function underlying() external view returns (address);

    /// @notice The asset that rewards and withdrawals to the Autopool are denominated in
    /// @inheritdoc IBaseAssetVault
    function baseAsset() external view override returns (address);

    /// @notice Debt balance of underlying asset that is in contract.  This
    ///     value includes only assets that are known as debt by the rest of the
    ///     system (i.e. transferred in on rebalance), and does not include
    ///     extraneous amounts of underlyer that may have ended up in this contract.
    function internalDebtBalance() external view returns (uint256);

    /// @notice Debt balance of underlyering asset staked externally.  This value only
    ///     includes assets known as debt to the rest of the system, and does not include
    ///     any assets staked on behalf of the DV in external contracts.
    function externalDebtBalance() external view returns (uint256);

    /// @notice Returns true value of _underlyer in DV.  Debt + tokens that may have
    ///     been transferred into the contract outside of rebalance.
    function internalQueriedBalance() external view returns (uint256);

    /// @notice Returns true value of staked _underlyer in external contract.  This
    ///     will include any _underlyer that has been staked on behalf of the DV.
    function externalQueriedBalance() external view returns (uint256);

    /// @notice Balance of underlying debt, sum of `externalDebtBalance()` and `internalDebtBalance()`.
    function balanceOfUnderlyingDebt() external view returns (uint256);

    /// @notice Rewarder for this vault
    function rewarder() external view returns (address);

    /// @notice Exchange this destination vault points to
    function exchangeName() external view returns (string memory);

    /// @notice The type of pool associated with this vault
    function poolType() external view returns (string memory);

    /// @notice If the pool only deals in ETH when adding or removing liquidity
    function poolDealInEth() external view returns (bool);

    /// @notice Tokens that base asset can be swapped into
    function underlyingTokens() external view returns (address[] memory);

    /* ******************************** */
    /* Events                           */
    /* ******************************** */

    event Donated(address sender, uint256 amount);
    event Withdraw(
        uint256 target, uint256 actual, uint256 debtLoss, uint256 claimLoss, uint256 fromIdle, uint256 fromDebt
    );
    event UpdateSignedMessage(bytes32 hash, bool flag);

    /* ******************************** */
    /* Errors                           */
    /* ******************************** */

    error ZeroAddress(string paramName);
    error InvalidShutdownStatus(VaultShutdownStatus status);

    /* ******************************** */
    /* Functions                        */
    /* ******************************** */

    /// @notice Setup the contract. These will be cloned so no constructor
    /// @param baseAsset_ Base asset of the system. WETH/USDC/etc
    /// @param underlyer_ Underlying asset the vault will wrap
    /// @param rewarder_ Reward tracker for this vault
    /// @param incentiveCalculator_ Incentive calculator for this vault
    /// @param additionalTrackedTokens_ Additional tokens that should be considered 'tracked'
    /// @param params_ Any extra parameters needed to setup the contract
    function initialize(
        IERC20 baseAsset_,
        IERC20 underlyer_,
        IMainRewarder rewarder_,
        address incentiveCalculator_,
        address[] memory additionalTrackedTokens_,
        bytes memory params_
    ) external;

    function getRangePricesLP() external returns (uint256 spotPrice, uint256 safePrice, bool isSpotSafe);

    /// @notice Calculates the current value of a portion of the debt based on shares
    /// @dev Queries the current value of all tokens we have deployed, whether its a single place, multiple, staked, etc
    /// @param shares The number of shares to value
    /// @return value The current value of our debt in terms of the baseAsset
    function debtValue(uint256 shares) external returns (uint256 value);

    /// @notice Collects any earned rewards from staking, incentives, etc. Transfers to sender
    /// @dev Should be limited to LIQUIDATOR_MANAGER. Rewards must be collected before claimed
    /// @return amounts amount of rewards claimed for each token
    /// @return tokens tokens claimed
    function collectRewards() external returns (uint256[] memory amounts, address[] memory tokens);

    /// @notice Pull any non-tracked token to the specified destination
    /// @dev Should be limited to TOKEN_RECOVERY_MANAGER
    function recover(address[] calldata tokens, uint256[] calldata amounts, address[] calldata destinations) external;

    /// @notice Recovers any extra underlying both in DV and staked externally not tracked as debt.
    /// @dev Should be limited to TOKEN_SAVER_ROLE.
    /// @param destination The address to send excess underlyer to.
    function recoverUnderlying(address destination) external;

    /// @notice Deposit underlying to receive destination vault shares
    /// @param amount amount of base lp asset to deposit
    function depositUnderlying(uint256 amount) external returns (uint256 shares);

    /// @notice Withdraw underlying by burning destination vault shares
    /// @param shares amount of destination vault shares to burn
    /// @param to destination of the underlying asset
    /// @return amount underlyer amount 'to' received
    function withdrawUnderlying(uint256 shares, address to) external returns (uint256 amount);

    /// @notice Burn specified shares for underlyer swapped to base asset
    /// @param shares amount of vault shares to burn
    /// @param to destination of the base asset
    /// @return amount base asset amount 'to' received
    function withdrawBaseAsset(uint256 shares, address to) external returns (uint256 amount);

    /// @notice Mark this vault as shutdown so that autoPools can react
    function shutdown(VaultShutdownStatus reason) external;

    /// @notice True if the vault has been shutdown
    function isShutdown() external view returns (bool);

    /// @notice Returns the reason for shutdown (or `Active` if not shutdown)
    function shutdownStatus() external view returns (VaultShutdownStatus);

    /// @notice Stats contract for this vault
    function getStats() external view returns (IDexLSTStats);

    /// @notice get the marketplace rewards
    /// @return rewardTokens list of reward token addresses
    /// @return rewardRates list of reward rates
    function getMarketplaceRewards() external returns (uint256[] memory rewardTokens, uint256[] memory rewardRates);

    /// @notice Get the address of the underlying pool the vault points to
    /// @return poolAddress address of the underlying pool
    function getPool() external view returns (address poolAddress);

    /// @notice Gets the spot price of the underlying LP token
    /// @dev Price validated to be inside our tolerance against safe price. Will revert if outside.
    /// @return price Value of 1 unit of the underlying LP token in terms of the base asset
    function getValidatedSpotPrice() external returns (uint256 price);

    /// @notice Gets the safe price of the underlying LP token
    /// @dev Price validated to be inside our tolerance against spot price. Will revert if outside.
    /// @return price Value of 1 unit of the underlying LP token in terms of the base asset
    function getValidatedSafePrice() external returns (uint256 price);

    /// @notice Get the lowest price we can get for the LP token
    /// @dev This price can be attacked is not validate to be in any range
    /// @return price Value of 1 unit of the underlying LP token in terms of the base asset
    function getUnderlyerFloorPrice() external returns (uint256 price);

    /// @notice Get the highest price we can get for the LP token
    /// @dev This price can be attacked is not validate to be in any range
    /// @return price Value of 1 unit of the underlying LP token in terms of the base asset
    function getUnderlyerCeilingPrice() external returns (uint256 price);

    /// @notice Set or unset  a hash as a signed message
    /// @dev Should be limited to DESTINATION_VAULTS_UPDATER. The set hash is used to vaildate a signature.
    /// This signature can be potentially used to claim offchain rewards earned by Destination Vaults.
    /// @param hash bytes32 hash of a payload
    /// @param flag boolean flag to indicate a validity of hash
    function setMessage(bytes32 hash, bool flag) external;
}

// SPDX-License-Identifier: UNLICENSED
// Copyright (c) 2023 Tokemak Foundation. All rights reserved.
pragma solidity 0.8.17;

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

/// @notice Creates and registers Destination Vaults for the system
interface IDestinationVaultFactory is ISystemComponent {
    /// @notice Creates a vault of the specified type
    /// @dev vaultType will be bytes32 encoded and checked that a template is registered
    /// @param vaultType human readable key of the vault template
    /// @param baseAsset Base asset of the system. WETH/USDC/etc
    /// @param underlyer Underlying asset the vault will wrap
    /// @param incentiveCalculator Incentive calculator of the vault
    /// @param additionalTrackedTokens Any tokens in addition to base and underlyer that should be tracked
    /// @param salt Contracts are created via CREATE2 with this value
    /// @param params params to be passed to vaults initialize function
    /// @return vault address of the newly created destination vault
    function create(
        string memory vaultType,
        address baseAsset,
        address underlyer,
        address incentiveCalculator,
        address[] memory additionalTrackedTokens,
        bytes32 salt,
        bytes memory params
    ) external returns (address vault);

    /// @notice Sets the default reward ratio
    /// @param rewardRatio new default reward ratio
    function setDefaultRewardRatio(uint256 rewardRatio) external;

    /// @notice Sets the default reward block duration
    /// @param blockDuration new default reward block duration
    function setDefaultRewardBlockDuration(uint256 blockDuration) external;
}

// SPDX-License-Identifier: UNLICENSED
// Copyright (c) 2023 Tokemak Foundation. All rights reserved.
pragma solidity 0.8.17;

import { IDestinationVaultFactory } from "src/interfaces/vault/IDestinationVaultFactory.sol";

/// @notice Tracks valid Destination Vaults for the system
interface IDestinationVaultRegistry {
    /// @notice Determines if a given address is a valid Destination Vault in the system
    /// @param destinationVault address to check
    /// @return True if vault is registered
    function isRegistered(address destinationVault) external view returns (bool);

    /// @notice Registers a new Destination Vault
    /// @dev Should be locked down to only a factory
    /// @param newDestinationVault Address of the new vault
    function register(address newDestinationVault) external;

    /// @notice Checks if an address is a valid Destination Vault and reverts if not
    /// @param destinationVault Destination Vault address to checked
    function verifyIsRegistered(address destinationVault) external view;

    /// @notice Returns a list of all registered vaults
    function listVaults() external view returns (address[] memory);

    /// @notice Factory that is allowed to create and registry Destination Vaults
    function factory() external view returns (IDestinationVaultFactory);
}

// SPDX-License-Identifier: UNLICENSED
// Copyright (c) 2023 Tokemak Foundation. All rights reserved.
pragma solidity 0.8.17;

import { ILSTStats } from "src/interfaces/stats/ILSTStats.sol";

/// @title Return stats DEXs with LSTs
interface IDexLSTStats {
    event DexSnapshotTaken(uint256 snapshotTimestamp, uint256 priorFeeApr, uint256 newFeeApr, uint256 unfilteredFeeApr);

    struct StakingIncentiveStats {
        // time-weighted average total supply to prevent spikes/attacks from impacting rebalancing
        uint256 safeTotalSupply;
        // rewardTokens, annualizedRewardAmounts, and periodFinishForRewards will match indexes
        // they are split to workaround an issue with forge having nested structs
        // address of the reward tokens
        address[] rewardTokens;
        // the annualized reward rate for the reward token
        uint256[] annualizedRewardAmounts;
        // the timestamp for when the rewards are set to terminate
        uint40[] periodFinishForRewards;
        // incentive rewards score. max 48, min 0
        uint8 incentiveCredits;
    }

    struct DexLSTStatsData {
        uint256 lastSnapshotTimestamp;
        uint256 feeApr;
        uint256[] reservesInEth;
        StakingIncentiveStats stakingIncentiveStats;
        ILSTStats.LSTStatsData[] lstStatsData;
    }

    /// @notice Get the current stats for the DEX with underlying LST tokens
    /// @dev Returned data is a combination of current data and filtered snapshots
    /// @return dexLSTStatsData current data on the DEX
    function current() external returns (DexLSTStatsData memory dexLSTStatsData);
}

// 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 (last updated v4.7.0) (interfaces/IERC3156FlashBorrower.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC3156 FlashBorrower, as defined in
 * https://eips.ethereum.org/EIPS/eip-3156[ERC-3156].
 *
 * _Available since v4.1._
 */
interface IERC3156FlashBorrower {
    /**
     * @dev Receive a flash loan.
     * @param initiator The initiator of the loan.
     * @param token The loan currency.
     * @param amount The amount of tokens lent.
     * @param fee The additional amount of tokens to repay.
     * @param data Arbitrary data structure, intended to contain user-defined parameters.
     * @return The keccak256 hash of "IERC3156FlashBorrower.onFlashLoan"
     */
    function onFlashLoan(
        address initiator,
        address token,
        uint256 amount,
        uint256 fee,
        bytes calldata data
    ) external returns (bytes32);
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.17;

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

/// @dev Interface of the ERC4626 "Tokenized Vault Standard", as defined in https://eips.ethereum.org/EIPS/eip-4626
/// @dev Due to the nature of obtaining estimates for previewing withdraws and redeems, a few functions are not
///     view and therefore do not conform to eip 4626.  These functions use state changing operations
///     to get accurate estimates, reverting after the preview amounts have been obtained.
interface IERC4626 is IERC20Metadata {
    event Deposit(address indexed sender, address indexed owner, uint256 assets, uint256 shares);

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

    /// @notice Returns the address of the underlying token used for the Vault for accounting, depositing, and
    /// withdrawing.
    /// @dev
    /// - MUST be an ERC-20 token contract.
    /// - MUST NOT revert.
    function asset() external view returns (address assetTokenAddress);

    /// @notice Returns the total amount of the underlying asset that is “managed” by Vault.
    /// @dev
    /// - SHOULD include any compounding that occurs from yield.
    /// - MUST be inclusive of any fees that are charged against assets in the Vault.
    /// - MUST NOT revert.
    function totalAssets() external view returns (uint256 totalManagedAssets);

    /// @notice Returns the amount of shares that the Vault would exchange for the amount of assets provided, in an
    /// ideal
    /// scenario where all the conditions are met.
    /// @dev
    /// - MUST NOT be inclusive of any fees that are charged against assets in the Vault.
    /// - MUST NOT show any variations depending on the caller.
    /// - MUST NOT reflect slippage or other on-chain conditions, when performing the actual exchange.
    /// - MUST NOT revert.
    ///
    /// NOTE: This calculation MAY NOT reflect the “per-user” price-per-share, and instead should reflect the
    /// “average-user’s” price-per-share, meaning what the average user should expect to see when exchanging to and
    /// from.
    function convertToShares(uint256 assets) external view returns (uint256 shares);

    /// @notice Returns the amount of assets that the Vault would exchange for the amount of shares provided, in an
    /// ideal
    /// scenario where all the conditions are met.
    /// @dev
    /// - MUST NOT be inclusive of any fees that are charged against assets in the Vault.
    /// - MUST NOT show any variations depending on the caller.
    /// - MUST NOT reflect slippage or other on-chain conditions, when performing the actual exchange.
    /// - MUST NOT revert.
    ///
    /// NOTE: This calculation MAY NOT reflect the “per-user” price-per-share, and instead should reflect the
    /// “average-user’s” price-per-share, meaning what the average user should expect to see when exchanging to and
    /// from.
    function convertToAssets(uint256 shares) external view returns (uint256 assets);

    /// @notice Returns the maximum amount of the underlying asset that can be deposited into the Vault for the
    /// receiver,
    /// through a deposit call.
    /// @dev
    /// - MUST return a limited value if receiver is subject to some deposit limit.
    /// - MUST return 2 ** 256 - 1 if there is no limit on the maximum amount of assets that may be deposited.
    /// - MUST NOT revert.
    function maxDeposit(address receiver) external returns (uint256 maxAssets);

    /// @notice Allows an on-chain or off-chain user to simulate the effects of their deposit at the current block,
    /// given
    /// current on-chain conditions.
    /// @dev
    /// - MUST return as close to and no more than the exact amount of Vault shares that would be minted in a deposit
    ///   call in the same transaction. I.e. deposit should return the same or more shares as previewDeposit if called
    ///   in the same transaction.
    /// - MUST NOT account for deposit limits like those returned from maxDeposit and should always act as though the
    ///   deposit would be accepted, regardless if the user has enough tokens approved, etc.
    /// - MUST be inclusive of deposit fees. Integrators should be aware of the existence of deposit fees.
    /// - MUST NOT revert.
    ///
    /// NOTE: any unfavorable discrepancy between convertToShares and previewDeposit SHOULD be considered slippage in
    /// share price or some other type of condition, meaning the depositor will lose assets by depositing.
    function previewDeposit(uint256 assets) external returns (uint256 shares);

    /// @notice Mints shares Vault shares to receiver by depositing exactly amount of underlying tokens.
    /// @dev
    /// - MUST emit the Deposit event.
    /// - MAY support an additional flow in which the underlying tokens are owned by the Vault contract before the
    ///   deposit execution, and are accounted for during deposit.
    /// - MUST revert if all of assets cannot be deposited (due to deposit limit being reached, slippage, the user not
    ///   approving enough underlying tokens to the Vault contract, etc).
    ///
    /// NOTE: most implementations will require pre-approval of the Vault with the Vault’s underlying asset token.
    function deposit(uint256 assets, address receiver) external returns (uint256 shares);

    /// @notice Returns the maximum amount of the Vault shares that can be minted for the receiver, through a mint call.
    /// @dev
    /// - MUST return a limited value if receiver is subject to some mint limit.
    /// - MUST return 2 ** 256 - 1 if there is no limit on the maximum amount of shares that may be minted.
    /// - MUST NOT revert.
    function maxMint(address receiver) external returns (uint256 maxShares);

    /// @notice Allows an on-chain or off-chain user to simulate the effects of their mint at the current block, given
    /// current on-chain conditions.
    /// @dev
    /// - MUST return as close to and no fewer than the exact amount of assets that would be deposited in a mint call
    ///   in the same transaction. I.e. mint should return the same or fewer assets as previewMint if called in the
    ///   same transaction.
    /// - MUST NOT account for mint limits like those returned from maxMint and should always act as though the mint
    ///   would be accepted, regardless if the user has enough tokens approved, etc.
    /// - MUST be inclusive of deposit fees. Integrators should be aware of the existence of deposit fees.
    /// - MUST NOT revert.
    ///
    /// NOTE: any unfavorable discrepancy between convertToAssets and previewMint SHOULD be considered slippage in
    /// share price or some other type of condition, meaning the depositor will lose assets by minting.
    function previewMint(uint256 shares) external returns (uint256 assets);

    /// @notice Mints exactly shares Vault shares to receiver by depositing amount of underlying tokens.
    /// @dev
    /// - MUST emit the Deposit event.
    /// - MAY support an additional flow in which the underlying tokens are owned by the Vault contract before the mint
    ///   execution, and are accounted for during mint.
    /// - MUST revert if all of shares cannot be minted (due to deposit limit being reached, slippage, the user not
    ///   approving enough underlying tokens to the Vault contract, etc).
    ///
    /// NOTE: most implementations will require pre-approval of the Vault with the Vault’s underlying asset token.
    function mint(uint256 shares, address receiver) external returns (uint256 assets);

    /// @notice Returns the maximum amount of the underlying asset that can be withdrawn from the owner balance in the
    /// Vault, through a withdraw call.
    /// @dev
    /// - MUST return a limited value if owner is subject to some withdrawal limit or timelock.
    /// - MUST NOT revert.
    function maxWithdraw(address owner) external returns (uint256 maxAssets);

    /// @notice Allows an on-chain or off-chain user to simulate the effects of their withdrawal at the current block,
    /// given current on-chain conditions.
    /// @dev
    /// - MUST return as close to and no fewer than the exact amount of Vault shares that would be burned in a withdraw
    ///   call in the same transaction. I.e. withdraw should return the same or fewer shares as previewWithdraw if
    ///   called
    ///   in the same transaction.
    /// - MUST NOT account for withdrawal limits like those returned from maxWithdraw and should always act as though
    ///   the withdrawal would be accepted, regardless if the user has enough shares, etc.
    /// - MUST be inclusive of withdrawal fees. Integrators should be aware of the existence of withdrawal fees.
    /// - MUST NOT revert.
    ///
    /// NOTE: any unfavorable discrepancy between convertToShares and previewWithdraw SHOULD be considered slippage in
    /// share price or some other type of condition, meaning the depositor will lose assets by depositing.
    function previewWithdraw(uint256 assets) external returns (uint256 shares);

    /// @notice Burns shares from owner and sends exactly assets of underlying tokens to receiver.
    /// @dev
    /// - MUST emit the Withdraw event.
    /// - MAY support an additional flow in which the underlying tokens are owned by the Vault contract before the
    ///   withdraw execution, and are accounted for during withdraw.
    /// - MUST revert if all of assets cannot be withdrawn (due to withdrawal limit being reached, slippage, the owner
    ///   not having enough shares, etc).
    ///
    /// Note that some implementations will require pre-requesting to the Vault before a withdrawal may be performed.
    /// Those methods should be performed separately.
    function withdraw(uint256 assets, address receiver, address owner) external returns (uint256 shares);

    /// @notice Returns the maximum amount of Vault shares that can be redeemed from the owner balance in the Vault,
    /// through a redeem call.
    /// @dev
    /// - MUST return a limited value if owner is subject to some withdrawal limit or timelock.
    /// - MUST return balanceOf(owner) if owner is not subject to any withdrawal limit or timelock.
    /// - MUST NOT revert.
    function maxRedeem(address owner) external returns (uint256 maxShares);

    /// @notice Allows an on-chain or off-chain user to simulate the effects of their redeemption at the current block,
    /// given current on-chain conditions.
    /// @dev
    /// - MUST return as close to and no more than the exact amount of assets that would be withdrawn in a redeem call
    ///   in the same transaction. I.e. redeem should return the same or more assets as previewRedeem if called in the
    ///   same transaction.
    /// - MUST NOT account for redemption limits like those returned from maxRedeem and should always act as though the
    ///   redemption would be accepted, regardless if the user has enough shares, etc.
    /// - MUST be inclusive of withdrawal fees. Integrators should be aware of the existence of withdrawal fees.
    /// - MUST NOT revert.
    ///
    /// NOTE: any unfavorable discrepancy between convertToAssets and previewRedeem SHOULD be considered slippage in
    /// share price or some other type of condition, meaning the depositor will lose assets by redeeming.
    function previewRedeem(uint256 shares) external returns (uint256 assets);

    /// @notice Burns exactly shares from owner and sends assets of underlying tokens to receiver.
    /// @dev
    /// - MUST emit the Withdraw event.
    /// - MAY support an additional flow in which the underlying tokens are owned by the Vault contract before the
    ///   redeem execution, and are accounted for during redeem.
    /// - MUST revert if all of shares cannot be redeemed (due to withdrawal limit being reached, slippage, the owner
    ///   not having enough shares, etc).
    ///
    /// NOTE: some implementations will require pre-requesting to the Vault before a withdrawal may be performed.
    /// Those methods should be performed separately.
    function redeem(uint256 shares, address receiver, address owner) external returns (uint256 assets);
}

// SPDX-License-Identifier: UNLICENSED
// Copyright (c) 2023 Tokemak Foundation. All rights reserved.
pragma solidity 0.8.17;

import { IBaseRewarder } from "src/interfaces/rewarders/IBaseRewarder.sol";

interface IExtraRewarder is IBaseRewarder {
    /**
     * @notice Withdraws the specified amount of tokens from the vault for the specified account.
     * @param account The address of the account to withdraw tokens for.
     * @param amount The amount of tokens to withdraw.
     */
    function withdraw(address account, uint256 amount) external;

    /**
     * @notice Claims and transfers all rewards for the specified account from this contract.
     * @param account The address of the account to claim rewards for.
     */
    function getReward(address account) external;
}

// SPDX-License-Identifier: UNLICENSED
// Copyright (c) 2023 Tokemak Foundation. All rights reserved.
pragma solidity 0.8.17;

/// @title EWMA pricing for incentive tokens
interface IIncentivesPricingStats {
    event TokenAdded(address indexed token);
    event TokenRemoved(address indexed token);
    event TokenSnapshot(
        address indexed token,
        uint40 lastSnapshot,
        uint256 fastFilterPrice,
        uint256 slowFilterPrice,
        uint256 initCount,
        bool initComplete
    );

    error TokenAlreadyRegistered(address token);
    error TokenNotFound(address token);
    error IncentiveTokenPriceStale(address token);
    error TokenSnapshotNotReady(address token);

    struct TokenSnapshotInfo {
        uint40 lastSnapshot;
        bool _initComplete;
        uint8 _initCount;
        uint256 _initAcc;
        uint256 fastFilterPrice;
        uint256 slowFilterPrice;
    }

    /// @notice add a token to snapshot
    /// @dev the token must be configured in the RootPriceOracle before adding here
    /// @param token the address of the token to add
    function setRegisteredToken(address token) external;

    /// @notice remove a token from being snapshot
    /// @param token the address of the token to remove
    function removeRegisteredToken(address token) external;

    /// @notice get the addresses for all currently registered tokens
    /// @return tokens all of the registered token addresses
    function getRegisteredTokens() external view returns (address[] memory tokens);

    /// @notice get all of the registered tokens with the latest snapshot info
    /// @return tokenAddresses token addresses in the same order as info
    /// @return info a list of snapshot info for the tokens
    function getTokenPricingInfo()
        external
        view
        returns (address[] memory tokenAddresses, TokenSnapshotInfo[] memory info);

    /// @notice update the snapshot for the specified tokens
    /// @dev if a token is not ready to be snapshot the entire call will fail
    function snapshot(address[] calldata tokensToSnapshot) external;

    /// @notice get the latest prices for an incentive token. Reverts if token is not registered
    /// @return fastPrice the price based on the faster filter (weighted toward current prices)
    /// @return slowPrice the price based on the slower filter (weighted toward older prices, relative to fast)
    function getPrice(address token, uint40 staleCheck) external view returns (uint256 fastPrice, uint256 slowPrice);

    /// @notice get the latest prices for an incentive token or zero if the token is not registered
    /// @return fastPrice the price based on the faster filter (weighted toward current prices)
    /// @return slowPrice the price based on the slower filter (weighted toward older prices, relative to fast)
    function getPriceOrZero(
        address token,
        uint40 staleCheck
    ) external view returns (uint256 fastPrice, uint256 slowPrice);
}

// SPDX-License-Identifier: UNLICENSED
// Copyright (c) 2023 Tokemak Foundation. All rights reserved.
pragma solidity 0.8.17;

/// @title Return stats on base LSTs
interface ILSTStats {
    struct LSTStatsData {
        uint256 lastSnapshotTimestamp;
        uint256 baseApr;
        int256 discount; // positive number is a discount, negative is a premium
        uint24[10] discountHistory; // 7 decimal precision
        uint40[5] discountTimestampByPercent; // each index is the timestamp that the token reached that discount
        uint256[] slashingCosts;
        uint256[] slashingTimestamps;
    }

    /// @notice Used to transfer LST snapshot data to other chain.
    struct LSTDestinationInfo {
        uint256 snapshotTimestamp;
        uint256 newBaseApr;
        uint256 currentEthPerToken;
    }

    /// @notice Get the current stats for the LST
    /// @dev Returned data is a combination of current data and filtered snapshots
    /// @return lstStatsData current data on the LST
    function current() external returns (LSTStatsData memory lstStatsData);

    /// @notice Get the EthPerToken (or Share) for the LST
    /// @return ethPerShare the backing eth for the LST
    function calculateEthPerToken() external view returns (uint256 ethPerShare);

    /// @notice Get if the underlying LST token is rebasing
    /// @return rebasing is true if the lst is a rebasing token
    function isRebasing() external view returns (bool rebasing);
}