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

import {ERC7540} from "./ERC7540.sol";
import {FeeManager} from "./FeeManager.sol";
import {Roles} from "./Roles.sol";
import {Whitelistable} from "./Whitelistable.sol";
import {State} from "./primitives/Enums.sol";
import {
    CantDepositNativeToken,
    Closed,
    ERC7540InvalidOperator,
    NotClosing,
    NotOpen,
    NotWhitelisted,
    OnlyAsyncDepositAllowed,
    OnlySyncDepositAllowed,
    ValuationUpdateNotAllowed
} from "./primitives/Errors.sol";

import {DepositSync, Referral, StateUpdated} from "./primitives/Events.sol";
import {ERC20Upgradeable} from "@openzeppelin/contracts-upgradeable/token/ERC20/ERC20Upgradeable.sol";
import {ERC4626Upgradeable} from "@openzeppelin/contracts-upgradeable/token/ERC20/extensions/ERC4626Upgradeable.sol";
import {IERC4626} from "@openzeppelin/contracts/interfaces/IERC4626.sol";
import {IERC20Metadata} from "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol";
import {IERC20, SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import {Math} from "@openzeppelin/contracts/utils/math/Math.sol";
import {FeeRegistry} from "../protocol/FeeRegistry.sol";

using SafeERC20 for IERC20;

/// @custom:storage-definition erc7201:hopper.storage.vault
/// @param underlying The address of the underlying asset.
/// @param name The name of the vault and by extension the ERC20 token.
/// @param symbol The symbol of the vault and by extension the ERC20 token.
/// @param safe The address of the safe smart contract.
/// @param whitelistManager The address of the whitelist manager.
/// @param valuationManager The address of the valuation manager.
/// @param admin The address of the owner of the vault.
/// @param feeReceiver The address of the fee receiver.
/// @param feeRegistry The address of the fee registry.
/// @param wrappedNativeToken The address of the wrapped native token.
/// @param managementRate The management fee rate.
/// @param performanceRate The performance fee rate.
/// @param rateUpdateCooldown The cooldown period for updating the fee rates.
/// @param enableWhitelist A boolean indicating whether the whitelist is enabled.
struct InitStruct {
    IERC20 underlying;
    string name;
    string symbol;
    address safe;
    address whitelistManager;
    address valuationManager;
    address admin;
    address feeReceiver;
    uint16 managementRate;
    uint16 performanceRate;
    bool enableWhitelist;
    uint256 rateUpdateCooldown;
}

/// @custom:oz-upgrades-from src/v0.4.0/Vault.sol:Vault
contract Vault is ERC7540, Whitelistable, FeeManager {
    /// @custom:storage-location erc7201:hopper.storage.vault
    /// @param newTotalAssets The new total assets of the vault. It is used to update the totalAssets variable.
    /// @param state The state of the vault. It can be Open, Closing, or Closed.
    struct VaultStorage {
        State state;
    }

    // keccak256(abi.encode(uint256(keccak256("hopper.storage.vault")) - 1)) & ~bytes32(uint256(0xff))
    /// @custom:slot erc7201:hopper.storage.vault
    // solhint-disable-next-line const-name-snakecase
    bytes32 private constant vaultStorage = 0x0e6b3200a60a991c539f47dddaca04a18eb4bcf2b53906fb44751d827f001400;

    /// @notice Returns the storage struct of the vault.
    /// @return _vaultStorage The storage struct of the vault.
    function _getVaultStorage() internal pure returns (VaultStorage storage _vaultStorage) {
        // solhint-disable-next-line no-inline-assembly
        assembly {
            _vaultStorage.slot := vaultStorage
        }
    }

    /// @custom:oz-upgrades-unsafe-allow constructor
    // solhint-disable-next-line ignoreConstructors
    constructor(
        bool disable
    ) {
        if (disable) _disableInitializers();
    }

    /// @notice Initializes the vault.
    /// @param data The encoded initialization parameters of the vault.
    function initialize(
        bytes memory data,
        address feeRegistry,
        address wrappedNativeToken
    ) public virtual initializer {
        InitStruct memory init = abi.decode(data, (InitStruct));
        __Ownable_init(init.admin); // initial vault owner
        __Roles_init(
            Roles.RolesStorage({
                whitelistManager: init.whitelistManager,
                feeReceiver: init.feeReceiver,
                safe: init.safe,
                feeRegistry: FeeRegistry(feeRegistry),
                valuationManager: init.valuationManager
            })
        );
        __ERC20_init(init.name, init.symbol);
        __ERC20Pausable_init();
        __ERC4626_init(init.underlying);
        __ERC7540_init(init.underlying, wrappedNativeToken);
        __Whitelistable_init(init.enableWhitelist);
        __FeeManager_init(
            feeRegistry,
            init.managementRate,
            init.performanceRate,
            IERC20Metadata(address(init.underlying)).decimals(),
            init.rateUpdateCooldown
        );

        emit StateUpdated(State.Open);
    }

    /////////////////////
    // ## MODIFIERS ## //
    /////////////////////

    /// @notice Reverts if the vault is not open.
    modifier onlyOpen() {
        State _state = _getVaultStorage().state;
        if (_state != State.Open) revert NotOpen(_state);
        _;
    }

    /// @notice Reverts if the vault is not closing.
    modifier onlyClosing() {
        State _state = _getVaultStorage().state;
        if (_state != State.Closing) revert NotClosing(_state);
        _;
    }

    // @notice Reverts if totalAssets is expired.
    modifier onlySyncDeposit() {
        // if total assets is not valid we can only do asynchronous deposit
        if (!isTotalAssetsValid()) {
            revert OnlyAsyncDepositAllowed();
        }
        _;
    }

    // @notice Reverts if totalAssets is valid.
    modifier onlyAsyncDeposit() {
        // if total assets is valid we can only do synchronous deposit
        if (isTotalAssetsValid()) {
            revert OnlySyncDepositAllowed();
        }
        _;
    }

    /////////////////////////////////////////////
    // ## DEPOSIT AND REDEEM FLOW FUNCTIONS ## //
    /////////////////////////////////////////////

    /// @param assets The amount of assets to deposit.
    /// @param controller The address of the controller involved in the deposit request.
    /// @param owner The address of the owner for whom the deposit is requested.
    function requestDeposit(
        uint256 assets,
        address controller,
        address owner
    ) public payable override onlyOperator(owner) whenNotPaused onlyAsyncDeposit returns (uint256 requestId) {
        if (!isWhitelisted(owner)) revert NotWhitelisted();
        return _requestDeposit(assets, controller, owner);
    }

    /// @notice Requests a deposit of assets, subject to whitelist validation.
    /// @param assets The amount of assets to deposit.
    /// @param controller The address of the controller involved in the deposit request.
    /// @param owner The address of the owner for whom the deposit is requested.
    /// @param referral The address who referred the deposit.
    function requestDeposit(
        uint256 assets,
        address controller,
        address owner,
        address referral
    ) public payable onlyOperator(owner) whenNotPaused onlyAsyncDeposit returns (uint256 requestId) {
        if (!isWhitelisted(owner)) revert NotWhitelisted();
        requestId = _requestDeposit(assets, controller, owner);

        emit Referral(referral, owner, requestId, assets);
    }

    /// @notice Deposit in a sychronous fashion into the vault.
    /// @param assets The assets to deposit.
    /// @param receiver The receiver of the shares.
    /// @return shares The resulting shares.
    function syncDeposit(
        uint256 assets,
        address receiver,
        address referral
    ) public payable onlySyncDeposit onlyOpen returns (uint256 shares) {
        ERC7540Storage storage $ = _getERC7540Storage();

        if (!isWhitelisted(msg.sender)) revert NotWhitelisted();

        if (msg.value != 0) {
            // if user sends eth and the underlying is wETH we will wrap it for him
            if (asset() == address($.wrappedNativeToken)) {
                assets = msg.value;
                // we do not send directly eth in case the safe is not payable
                $.pendingSilo.depositEth{value: assets}();
                IERC20(asset()).safeTransferFrom(address($.pendingSilo), safe(), assets);
            } else {
                revert CantDepositNativeToken();
            }
        } else {
            IERC20(asset()).safeTransferFrom(msg.sender, safe(), assets);
        }
        shares = _convertToShares(assets, Math.Rounding.Floor);
        $.totalAssets += assets;
        _mint(receiver, shares);

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

        emit Referral(referral, msg.sender, 0, assets);
    }

    /// @notice Requests the redemption of tokens, subject to whitelist validation.
    /// @param shares The number of tokens to redeem.
    /// @param controller The address of the controller involved in the redemption request.
    /// @param owner The address of the token owner requesting redemption.
    /// @return requestId The id of the redeem request.
    function requestRedeem(
        uint256 shares,
        address controller,
        address owner
    ) public onlyOpen whenNotPaused returns (uint256 requestId) {
        if (!isWhitelisted(owner)) revert NotWhitelisted();
        return _requestRedeem(shares, controller, owner);
    }

    /// @notice Function to bundle a claim of shares and a request redeem. It can be convenient for UX.
    /// @dev if claimable == 0, it has the same behavior as requestRedeem function.
    /// @dev if claimable > 0, user shares follow this path: vault --> user ; user --> pendingSilo
    function claimSharesAndRequestRedeem(
        uint256 sharesToRedeem
    ) public onlyOpen whenNotPaused returns (uint40 requestId) {
        if (!isWhitelisted(msg.sender)) revert NotWhitelisted();

        uint256 claimable = claimableDepositRequest(0, msg.sender);
        if (claimable > 0) _deposit(claimable, msg.sender, msg.sender);

        uint256 redeemId = _requestRedeem(sharesToRedeem, msg.sender, msg.sender);

        return uint40(redeemId);
    }

    /// @dev Unusable when paused.
    /// @dev First _withdraw path: whenNotPaused via ERC20Pausable._update.
    /// @dev Second _withdraw path: whenNotPaused in ERC7540.
    function withdraw(
        uint256 assets,
        address receiver,
        address controller
    ) public override(ERC4626Upgradeable, IERC4626) whenNotPaused returns (uint256 shares) {
        VaultStorage storage $ = _getVaultStorage();

        if ($.state == State.Closed && claimableRedeemRequest(0, controller) == 0) {
            shares = _convertToShares(assets, Math.Rounding.Ceil);
            _withdraw(msg.sender, receiver, controller, assets, shares); // sync
        } else {
            if (controller != msg.sender && !isOperator(controller, msg.sender)) {
                revert ERC7540InvalidOperator();
            }
            return _withdraw(assets, receiver, controller); // async
        }
    }

    /// @dev Unusable when paused.
    /// @dev First _withdraw path: whenNotPaused via ERC20Pausable._update.
    /// @dev Second _withdraw path: whenNotPaused in ERC7540.
    /// @notice Claim assets from the vault. After a request is made and settled.
    /// @param shares The amount shares to convert into assets.
    /// @param receiver The receiver of the assets.
    /// @param controller The controller, who owns the redeem request.
    /// @return assets The corresponding assets.
    function redeem(
        uint256 shares,
        address receiver,
        address controller
    ) public override(ERC4626Upgradeable, IERC4626) whenNotPaused returns (uint256 assets) {
        VaultStorage storage $ = _getVaultStorage();

        if ($.state == State.Closed && claimableRedeemRequest(0, controller) == 0) {
            assets = _convertToAssets(shares, Math.Rounding.Floor);
            _withdraw(msg.sender, receiver, controller, assets, shares);
        } else {
            if (controller != msg.sender && !isOperator(controller, msg.sender)) {
                revert ERC7540InvalidOperator();
            }
            return _redeem(shares, receiver, controller);
        }
    }

    /// @dev override ERC4626 synchronous withdraw; called only when vault is closed
    /// @param caller The address of the caller.
    /// @param receiver The address of the receiver of the assets.
    /// @param owner The address of the owner of the shares.
    /// @param assets The amount of assets to withdraw.
    /// @param shares The amount of shares to burn.
    function _withdraw(
        address caller,
        address receiver,
        address owner,
        uint256 assets,
        uint256 shares
    ) internal virtual override {
        if (caller != owner && !isOperator(owner, caller)) {
            _spendAllowance(owner, caller, shares);
        }

        _getERC7540Storage().totalAssets -= assets;

        _burn(owner, shares);

        IERC20(asset()).safeTransfer(receiver, assets);

        emit Withdraw(caller, receiver, owner, assets, shares);
    }

    /// @notice Claims all available shares for a list of controller addresses.
    /// @dev Iterates over each controller address, checks for claimable deposits, and deposits them on their behalf.
    /// @param controllers The list of controller addresses for which to claim shares.
    function claimSharesOnBehalf(
        address[] memory controllers
    ) external onlySafe {
        for (uint256 i = 0; i < controllers.length; i++) {
            uint256 claimable = claimableDepositRequest(0, controllers[i]);
            if (claimable > 0) {
                _deposit(claimable, controllers[i], controllers[i]);
            }
        }
    }

    /// @notice Sends assets to users who already have a claimable redemption,
    /// so they don't need to call redeem() themselves. Processes in batch.
    /// @dev Only the Safe can call this; it respects the vault's paused state.
    /// @param controllers The list of controller addresses for which to redeem.
    function redeemOnBehalf(
        address[] memory controllers
    ) external onlySafe whenNotPaused {
        for (uint256 i = 0; i < controllers.length; i++) {
            uint256 claimable = claimableRedeemRequest(0, controllers[i]);
            if (claimable > 0) {
                // receiver = controller by default
                _redeem(claimable, controllers[i], controllers[i]);
            }
        }
    }

    ///////////////////////////////////////////////////////
    // ## VALUATION UPDATING AND SETTLEMENT FUNCTIONS ## //
    ///////////////////////////////////////////////////////

    function updateTotalAssetsLifespan(
        uint128 lifespan
    ) external onlySafe {
        _updateTotalAssetsLifespan(lifespan);
    }

    /// @notice Function to propose a new valuation for the vault.
    /// @notice It can only be called by the ValueManager.
    /// @param _newTotalAssets The new total assets of the vault.
    function updateNewTotalAssets(
        uint256 _newTotalAssets
    ) public onlyValuationManager {
        if (_getVaultStorage().state == State.Closed) revert Closed();

        // if totalAssets is not expired yet it means syncDeposit are allowed
        // in this case we do not allow onlyValuationManager to propose a new nav
        // he must call unvalidateTotalAssets first.
        if (isTotalAssetsValid()) {
            revert ValuationUpdateNotAllowed();
        }
        _updateNewTotalAssets(_newTotalAssets);
    }

    /// @notice Settles deposit requests, integrates user funds into the vault strategy, and enables share claims.
    /// If possible, it also settles redeem requests.
    /// @dev Unusable when paused, protected by whenNotPaused in _updateTotalAssets.
    function settleDeposit(
        uint256 _newTotalAssets
    ) public override onlySafe onlyOpen {
        _updateTotalAssetsAndTakeFees(_newTotalAssets);
        _settleDeposit(msg.sender);
        _settleRedeem(msg.sender); // if it is possible to settleRedeem, we should do so
    }

    /// @notice Settles redeem requests, only callable by the safe.
    /// @dev Unusable when paused, protected by whenNotPaused in _updateTotalAssets.
    /// @dev After updating totalAssets, it takes fees, updates highWaterMark and finally settles redeem requests.
    /// @inheritdoc ERC7540
    function settleRedeem(
        uint256 _newTotalAssets
    ) public override onlySafe onlyOpen {
        _updateTotalAssetsAndTakeFees(_newTotalAssets);
        _settleRedeem(msg.sender);
    }

    /// @notice Settles deposit requests, integrates user funds into the vault strategy, and enables share claims.
    /// If possible, it also settles redeem requests.
    /// @dev Unusable when paused, protected by whenNotPaused in _updateTotalAssets.
    function _updateTotalAssetsAndTakeFees(
        uint256 _newTotalAssets
    ) internal {
        RolesStorage storage $roles = _getRolesStorage();

        _updateTotalAssets(_newTotalAssets);
        _takeFees($roles.feeReceiver, $roles.feeRegistry.protocolFeeReceiver());
    }

    /////////////////////////////
    // ## CLOSING FUNCTIONS ## //
    /////////////////////////////

    /// @notice Initiates the closing of the vault. Can only be called by the owner.
    /// @dev we make sure that initiate closing will make an epoch changement if the variable newTotalAssets is
    /// "defined"
    /// @dev (!= type(uint256).max). This guarantee that no userShares will be locked in a pending state.
    function initiateClosing() external onlyOwner onlyOpen {
        ERC7540Storage storage $ = _getERC7540Storage();
        if ($.newTotalAssets != type(uint256).max) {
            _updateNewTotalAssets($.newTotalAssets);
        }
        _getVaultStorage().state = State.Closing;
        emit StateUpdated(State.Closing);
    }

    /// @notice Closes the vault, only redemption and withdrawal are allowed after this. Can only be called by the safe.
    /// @dev Users can still requestDeposit but it can't be settled.
    function close(
        uint256 _newTotalAssets
    ) external onlySafe onlyClosing {
        RolesStorage storage $roles = _getRolesStorage();
        _updateTotalAssets(_newTotalAssets);
        _takeFees($roles.feeReceiver, $roles.feeRegistry.protocolFeeReceiver());

        _settleDeposit(msg.sender);
        _settleRedeem(msg.sender);
        _getVaultStorage().state = State.Closed;

        // Transfer will fail if there are not enough assets inside the safe, making sure that redeem requests are
        // fulfilled
        IERC20(asset()).safeTransferFrom(msg.sender, address(this), _getERC7540Storage().totalAssets);

        emit StateUpdated(State.Closed);
    }

    /////////////////////////////////
    // ## PAUSABILITY FUNCTIONS ## //
    /////////////////////////////////

    /// @notice Halts core operations of the vault. Can only be called by the owner.
    /// @notice Core operations include deposit, redeem, withdraw, any type of request, settles deposit and redeem and
    /// newTotalAssets update.
    function pause() public onlyOwner {
        _pause();
    }

    /// @notice Resumes core operations of the vault. Can only be called by the owner.
    function unpause() public onlyOwner {
        _unpause();
    }

    function expireTotalAssets() public onlySafe {
        _getERC7540Storage().totalAssetsExpiration = 0;
    }

    // MAX FUNCTIONS OVERRIDE //

    /// @notice Returns the maximum redeemable shares for a controller.
    /// @param controller The controller.
    /// @return shares The maximum redeemable shares.
    /// @dev When the vault is closed, users may claim there assets (erc7540.redeem style) or redeem there assets in a
    /// sync manner.
    /// this is why when they have nothing to claim and the vault is closed, we return their shares balance
    function maxRedeem(
        address controller
    ) public view override(IERC4626, ERC4626Upgradeable) returns (uint256) {
        if (paused()) return 0;
        uint256 shares = claimableRedeemRequest(0, controller);
        if (shares == 0 && _getVaultStorage().state == State.Closed) {
            // controller has no redeem claimable, we will use the synchronous flow
            return balanceOf(controller);
        }
        return shares;
    }

    /// @notice Returns the amount of assets a controller will get if he redeem.
    /// @param controller The controller.
    /// @return The maximum amount of assets to get.
    /// @dev This is the same philosophy as maxRedeem, except that we take care to convertToAssets the value before
    /// returning it
    function maxWithdraw(
        address controller
    ) public view override(IERC4626, ERC4626Upgradeable) returns (uint256) {
        if (paused()) return 0;

        uint256 shares = claimableRedeemRequest(0, controller);
        if (shares == 0 && _getVaultStorage().state == State.Closed) {
            // controller has no redeem claimable, we will use the synchronous flow
            return convertToAssets(balanceOf(controller));
        }
        uint256 lastRedeemId = _getERC7540Storage().lastRedeemRequestId[controller];
        return convertToAssets(shares, lastRedeemId);
    }

    /// @notice Returns the amount of assets a controller will get if he redeem.
    /// @param  controller address to check
    /// @dev    If the contract is paused no deposit/claims are possible.
    function maxDeposit(
        address controller
    ) public view override(IERC4626, ERC4626Upgradeable) returns (uint256) {
        if (paused()) return 0;
        return claimableDepositRequest(0, controller);
    }

    /// @notice Returns the amount of sharres a controller will get if he calls Deposit.
    /// @param controller The controller.
    /// @dev    If the contract is paused no deposit/claims are possible.
    /// @dev    We read the claimableDepositRequest of the controller then convert it to shares using the
    /// convertToShares
    /// of the related epochId
    /// @return The maximum amount of shares to get.
    function maxMint(
        address controller
    ) public view override(IERC4626, ERC4626Upgradeable) returns (uint256) {
        if (paused()) return 0;
        uint256 lastDepositId = _getERC7540Storage().lastDepositRequestId[controller];
        uint256 claimable = claimableDepositRequest(lastDepositId, controller);
        return convertToShares(claimable, lastDepositId);
    }

    function isTotalAssetsValid() public view returns (bool) {
        return block.timestamp < _getERC7540Storage().totalAssetsExpiration;
    }

    function safe() public view override returns (address) {
        return _getRolesStorage().safe;
    }

    function version() public pure returns (string memory) {
        return "v0.5.0";
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (access/Ownable2Step.sol)

pragma solidity ^0.8.20;

import {OwnableUpgradeable} from "./OwnableUpgradeable.sol";
import {Initializable} from "../proxy/utils/Initializable.sol";

/**
 * @dev Contract module which provides access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * This extension of the {Ownable} contract includes a two-step mechanism to transfer
 * ownership, where the new owner must call {acceptOwnership} in order to replace the
 * old one. This can help prevent common mistakes, such as transfers of ownership to
 * incorrect accounts, or to contracts that are unable to interact with the
 * permission system.
 *
 * The initial owner is specified at deployment time in the constructor for `Ownable`. This
 * can later be changed with {transferOwnership} and {acceptOwnership}.
 *
 * This module is used through inheritance. It will make available all functions
 * from parent (Ownable).
 */
abstract contract Ownable2StepUpgradeable is Initializable, OwnableUpgradeable {
    /// @custom:storage-location erc7201:openzeppelin.storage.Ownable2Step
    struct Ownable2StepStorage {
        address _pendingOwner;
    }

    // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.Ownable2Step")) - 1)) & ~bytes32(uint256(0xff))
    bytes32 private constant Ownable2StepStorageLocation = 0x237e158222e3e6968b72b9db0d8043aacf074ad9f650f0d1606b4d82ee432c00;

    function _getOwnable2StepStorage() private pure returns (Ownable2StepStorage storage $) {
        assembly {
            $.slot := Ownable2StepStorageLocation
        }
    }

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

    function __Ownable2Step_init() internal onlyInitializing {
    }

    function __Ownable2Step_init_unchained() internal onlyInitializing {
    }
    /**
     * @dev Returns the address of the pending owner.
     */
    function pendingOwner() public view virtual returns (address) {
        Ownable2StepStorage storage $ = _getOwnable2StepStorage();
        return $._pendingOwner;
    }

    /**
     * @dev Starts the ownership transfer of the contract to a new account. Replaces the pending transfer if there is one.
     * Can only be called by the current owner.
     *
     * Setting `newOwner` to the zero address is allowed; this can be used to cancel an initiated ownership transfer.
     */
    function transferOwnership(address newOwner) public virtual override onlyOwner {
        Ownable2StepStorage storage $ = _getOwnable2StepStorage();
        $._pendingOwner = newOwner;
        emit OwnershipTransferStarted(owner(), newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`) and deletes any pending owner.
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual override {
        Ownable2StepStorage storage $ = _getOwnable2StepStorage();
        delete $._pendingOwner;
        super._transferOwnership(newOwner);
    }

    /**
     * @dev The new owner accepts the ownership transfer.
     */
    function acceptOwnership() public virtual {
        address sender = _msgSender();
        if (pendingOwner() != sender) {
            revert OwnableUnauthorizedAccount(sender);
        }
        _transferOwnership(sender);
    }
}

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

pragma solidity ^0.8.20;

import {ContextUpgradeable} from "../utils/ContextUpgradeable.sol";
import {Initializable} from "../proxy/utils/Initializable.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * The initial owner is set to the address provided by the deployer. This can
 * later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {
    /// @custom:storage-location erc7201:openzeppelin.storage.Ownable
    struct OwnableStorage {
        address _owner;
    }

    // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.Ownable")) - 1)) & ~bytes32(uint256(0xff))
    bytes32 private constant OwnableStorageLocation = 0x9016d09d72d40fdae2fd8ceac6b6234c7706214fd39c1cd1e609a0528c199300;

    function _getOwnableStorage() private pure returns (OwnableStorage storage $) {
        assembly {
            $.slot := OwnableStorageLocation
        }
    }

    /**
     * @dev The caller account is not authorized to perform an operation.
     */
    error OwnableUnauthorizedAccount(address account);

    /**
     * @dev The owner is not a valid owner account. (eg. `address(0)`)
     */
    error OwnableInvalidOwner(address owner);

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

    /**
     * @dev Initializes the contract setting the address provided by the deployer as the initial owner.
     */
    function __Ownable_init(address initialOwner) internal onlyInitializing {
        __Ownable_init_unchained(initialOwner);
    }

    function __Ownable_init_unchained(address initialOwner) internal onlyInitializing {
        if (initialOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _transferOwnership(initialOwner);
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

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

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        if (owner() != _msgSender()) {
            revert OwnableUnauthorizedAccount(_msgSender());
        }
    }

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

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        if (newOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _transferOwnership(newOwner);
    }

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.3.0) (proxy/utils/Initializable.sol)

pragma solidity ^0.8.20;

/**
 * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
 * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an
 * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
 * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
 *
 * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be
 * reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in
 * case an upgrade adds a module that needs to be initialized.
 *
 * For example:
 *
 * [.hljs-theme-light.nopadding]
 * ```solidity
 * contract MyToken is ERC20Upgradeable {
 *     function initialize() initializer public {
 *         __ERC20_init("MyToken", "MTK");
 *     }
 * }
 *
 * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {
 *     function initializeV2() reinitializer(2) public {
 *         __ERC20Permit_init("MyToken");
 *     }
 * }
 * ```
 *
 * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
 * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
 *
 * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
 * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
 *
 * [CAUTION]
 * ====
 * Avoid leaving a contract uninitialized.
 *
 * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
 * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke
 * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:
 *
 * [.hljs-theme-light.nopadding]
 * ```
 * /// @custom:oz-upgrades-unsafe-allow constructor
 * constructor() {
 *     _disableInitializers();
 * }
 * ```
 * ====
 */
abstract contract Initializable {
    /**
     * @dev Storage of the initializable contract.
     *
     * It's implemented on a custom ERC-7201 namespace to reduce the risk of storage collisions
     * when using with upgradeable contracts.
     *
     * @custom:storage-location erc7201:openzeppelin.storage.Initializable
     */
    struct InitializableStorage {
        /**
         * @dev Indicates that the contract has been initialized.
         */
        uint64 _initialized;
        /**
         * @dev Indicates that the contract is in the process of being initialized.
         */
        bool _initializing;
    }

    // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.Initializable")) - 1)) & ~bytes32(uint256(0xff))
    bytes32 private constant INITIALIZABLE_STORAGE = 0xf0c57e16840df040f15088dc2f81fe391c3923bec73e23a9662efc9c229c6a00;

    /**
     * @dev The contract is already initialized.
     */
    error InvalidInitialization();

    /**
     * @dev The contract is not initializing.
     */
    error NotInitializing();

    /**
     * @dev Triggered when the contract has been initialized or reinitialized.
     */
    event Initialized(uint64 version);

    /**
     * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,
     * `onlyInitializing` functions can be used to initialize parent contracts.
     *
     * Similar to `reinitializer(1)`, except that in the context of a constructor an `initializer` may be invoked any
     * number of times. This behavior in the constructor can be useful during testing and is not expected to be used in
     * production.
     *
     * Emits an {Initialized} event.
     */
    modifier initializer() {
        // solhint-disable-next-line var-name-mixedcase
        InitializableStorage storage $ = _getInitializableStorage();

        // Cache values to avoid duplicated sloads
        bool isTopLevelCall = !$._initializing;
        uint64 initialized = $._initialized;

        // Allowed calls:
        // - initialSetup: the contract is not in the initializing state and no previous version was
        //                 initialized
        // - construction: the contract is initialized at version 1 (no reinitialization) and the
        //                 current contract is just being deployed
        bool initialSetup = initialized == 0 && isTopLevelCall;
        bool construction = initialized == 1 && address(this).code.length == 0;

        if (!initialSetup && !construction) {
            revert InvalidInitialization();
        }
        $._initialized = 1;
        if (isTopLevelCall) {
            $._initializing = true;
        }
        _;
        if (isTopLevelCall) {
            $._initializing = false;
            emit Initialized(1);
        }
    }

    /**
     * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the
     * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be
     * used to initialize parent contracts.
     *
     * A reinitializer may be used after the original initialization step. This is essential to configure modules that
     * are added through upgrades and that require initialization.
     *
     * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer`
     * cannot be nested. If one is invoked in the context of another, execution will revert.
     *
     * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in
     * a contract, executing them in the right order is up to the developer or operator.
     *
     * WARNING: Setting the version to 2**64 - 1 will prevent any future reinitialization.
     *
     * Emits an {Initialized} event.
     */
    modifier reinitializer(uint64 version) {
        // solhint-disable-next-line var-name-mixedcase
        InitializableStorage storage $ = _getInitializableStorage();

        if ($._initializing || $._initialized >= version) {
            revert InvalidInitialization();
        }
        $._initialized = version;
        $._initializing = true;
        _;
        $._initializing = false;
        emit Initialized(version);
    }

    /**
     * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the
     * {initializer} and {reinitializer} modifiers, directly or indirectly.
     */
    modifier onlyInitializing() {
        _checkInitializing();
        _;
    }

    /**
     * @dev Reverts if the contract is not in an initializing state. See {onlyInitializing}.
     */
    function _checkInitializing() internal view virtual {
        if (!_isInitializing()) {
            revert NotInitializing();
        }
    }

    /**
     * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.
     * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized
     * to any version. It is recommended to use this to lock implementation contracts that are designed to be called
     * through proxies.
     *
     * Emits an {Initialized} event the first time it is successfully executed.
     */
    function _disableInitializers() internal virtual {
        // solhint-disable-next-line var-name-mixedcase
        InitializableStorage storage $ = _getInitializableStorage();

        if ($._initializing) {
            revert InvalidInitialization();
        }
        if ($._initialized != type(uint64).max) {
            $._initialized = type(uint64).max;
            emit Initialized(type(uint64).max);
        }
    }

    /**
     * @dev Returns the highest version that has been initialized. See {reinitializer}.
     */
    function _getInitializedVersion() internal view returns (uint64) {
        return _getInitializableStorage()._initialized;
    }

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

    /**
     * @dev Pointer to storage slot. Allows integrators to override it with a custom storage location.
     *
     * NOTE: Consider following the ERC-7201 formula to derive storage locations.
     */
    function _initializableStorageSlot() internal pure virtual returns (bytes32) {
        return INITIALIZABLE_STORAGE;
    }

    /**
     * @dev Returns a pointer to the storage namespace.
     */
    // solhint-disable-next-line var-name-mixedcase
    function _getInitializableStorage() private pure returns (InitializableStorage storage $) {
        bytes32 slot = _initializableStorageSlot();
        assembly {
            $.slot := slot
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (token/ERC20/ERC20.sol)

pragma solidity ^0.8.20;

import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import {IERC20Metadata} from "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol";
import {ContextUpgradeable} from "../../utils/ContextUpgradeable.sol";
import {IERC20Errors} from "@openzeppelin/contracts/interfaces/draft-IERC6093.sol";
import {Initializable} from "../../proxy/utils/Initializable.sol";

/**
 * @dev Implementation of the {IERC20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * The default value of {decimals} is 18. To change this, you should override
 * this function so it returns a different value.
 *
 * We have followed general OpenZeppelin Contracts guidelines: functions revert
 * instead returning `false` on failure. This behavior is nonetheless
 * conventional and does not conflict with the expectations of ERC-20
 * applications.
 */
abstract contract ERC20Upgradeable is Initializable, ContextUpgradeable, IERC20, IERC20Metadata, IERC20Errors {
    /// @custom:storage-location erc7201:openzeppelin.storage.ERC20
    struct ERC20Storage {
        mapping(address account => uint256) _balances;

        mapping(address account => mapping(address spender => uint256)) _allowances;

        uint256 _totalSupply;

        string _name;
        string _symbol;
    }

    // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.ERC20")) - 1)) & ~bytes32(uint256(0xff))
    bytes32 private constant ERC20StorageLocation = 0x52c63247e1f47db19d5ce0460030c497f067ca4cebf71ba98eeadabe20bace00;

    function _getERC20Storage() private pure returns (ERC20Storage storage $) {
        assembly {
            $.slot := ERC20StorageLocation
        }
    }

    /**
     * @dev Sets the values for {name} and {symbol}.
     *
     * Both values are immutable: they can only be set once during construction.
     */
    function __ERC20_init(string memory name_, string memory symbol_) internal onlyInitializing {
        __ERC20_init_unchained(name_, symbol_);
    }

    function __ERC20_init_unchained(string memory name_, string memory symbol_) internal onlyInitializing {
        ERC20Storage storage $ = _getERC20Storage();
        $._name = name_;
        $._symbol = symbol_;
    }

    /**
     * @dev Returns the name of the token.
     */
    function name() public view virtual returns (string memory) {
        ERC20Storage storage $ = _getERC20Storage();
        return $._name;
    }

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view virtual returns (string memory) {
        ERC20Storage storage $ = _getERC20Storage();
        return $._symbol;
    }

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

    /// @inheritdoc IERC20
    function totalSupply() public view virtual returns (uint256) {
        ERC20Storage storage $ = _getERC20Storage();
        return $._totalSupply;
    }

    /// @inheritdoc IERC20
    function balanceOf(address account) public view virtual returns (uint256) {
        ERC20Storage storage $ = _getERC20Storage();
        return $._balances[account];
    }

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

    /// @inheritdoc IERC20
    function allowance(address owner, address spender) public view virtual returns (uint256) {
        ERC20Storage storage $ = _getERC20Storage();
        return $._allowances[owner][spender];
    }

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

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

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to`.
     *
     * This internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * NOTE: This function is not virtual, {_update} should be overridden instead.
     */
    function _transfer(address from, address to, uint256 value) internal {
        if (from == address(0)) {
            revert ERC20InvalidSender(address(0));
        }
        if (to == address(0)) {
            revert ERC20InvalidReceiver(address(0));
        }
        _update(from, to, value);
    }

    /**
     * @dev Transfers a `value` amount of tokens from `from` to `to`, or alternatively mints (or burns) if `from`
     * (or `to`) is the zero address. All customizations to transfers, mints, and burns should be done by overriding
     * this function.
     *
     * Emits a {Transfer} event.
     */
    function _update(address from, address to, uint256 value) internal virtual {
        ERC20Storage storage $ = _getERC20Storage();
        if (from == address(0)) {
            // Overflow check required: The rest of the code assumes that totalSupply never overflows
            $._totalSupply += value;
        } else {
            uint256 fromBalance = $._balances[from];
            if (fromBalance < value) {
                revert ERC20InsufficientBalance(from, fromBalance, value);
            }
            unchecked {
                // Overflow not possible: value <= fromBalance <= totalSupply.
                $._balances[from] = fromBalance - value;
            }
        }

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

        emit Transfer(from, to, value);
    }

    /**
     * @dev Creates a `value` amount of tokens and assigns them to `account`, by transferring it from address(0).
     * Relies on the `_update` mechanism
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * NOTE: This function is not virtual, {_update} should be overridden instead.
     */
    function _mint(address account, uint256 value) internal {
        if (account == address(0)) {
            revert ERC20InvalidReceiver(address(0));
        }
        _update(address(0), account, value);
    }

    /**
     * @dev Destroys a `value` amount of tokens from `account`, lowering the total supply.
     * Relies on the `_update` mechanism.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * NOTE: This function is not virtual, {_update} should be overridden instead
     */
    function _burn(address account, uint256 value) internal {
        if (account == address(0)) {
            revert ERC20InvalidSender(address(0));
        }
        _update(account, address(0), value);
    }

    /**
     * @dev Sets `value` as the allowance of `spender` over the `owner`'s tokens.
     *
     * This internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     *
     * Overrides to this logic should be done to the variant with an additional `bool emitEvent` argument.
     */
    function _approve(address owner, address spender, uint256 value) internal {
        _approve(owner, spender, value, true);
    }

    /**
     * @dev Variant of {_approve} with an optional flag to enable or disable the {Approval} event.
     *
     * By default (when calling {_approve}) the flag is set to true. On the other hand, approval changes made by
     * `_spendAllowance` during the `transferFrom` operation set the flag to false. This saves gas by not emitting any
     * `Approval` event during `transferFrom` operations.
     *
     * Anyone who wishes to continue emitting `Approval` events on the`transferFrom` operation can force the flag to
     * true using the following override:
     *
     * ```solidity
     * function _approve(address owner, address spender, uint256 value, bool) internal virtual override {
     *     super._approve(owner, spender, value, true);
     * }
     * ```
     *
     * Requirements are the same as {_approve}.
     */
    function _approve(address owner, address spender, uint256 value, bool emitEvent) internal virtual {
        ERC20Storage storage $ = _getERC20Storage();
        if (owner == address(0)) {
            revert ERC20InvalidApprover(address(0));
        }
        if (spender == address(0)) {
            revert ERC20InvalidSpender(address(0));
        }
        $._allowances[owner][spender] = value;
        if (emitEvent) {
            emit Approval(owner, spender, value);
        }
    }

    /**
     * @dev Updates `owner`'s allowance for `spender` based on spent `value`.
     *
     * Does not update the allowance value in case of infinite allowance.
     * Revert if not enough allowance is available.
     *
     * Does not emit an {Approval} event.
     */
    function _spendAllowance(address owner, address spender, uint256 value) internal virtual {
        uint256 currentAllowance = allowance(owner, spender);
        if (currentAllowance < type(uint256).max) {
            if (currentAllowance < value) {
                revert ERC20InsufficientAllowance(spender, currentAllowance, value);
            }
            unchecked {
                _approve(owner, spender, currentAllowance - value, false);
            }
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (token/ERC20/extensions/ERC20Pausable.sol)

pragma solidity ^0.8.20;

import {ERC20Upgradeable} from "../ERC20Upgradeable.sol";
import {PausableUpgradeable} from "../../../utils/PausableUpgradeable.sol";
import {Initializable} from "../../../proxy/utils/Initializable.sol";

/**
 * @dev ERC-20 token with pausable token transfers, minting and burning.
 *
 * Useful for scenarios such as preventing trades until the end of an evaluation
 * period, or having an emergency switch for freezing all token transfers in the
 * event of a large bug.
 *
 * IMPORTANT: This contract does not include public pause and unpause functions. In
 * addition to inheriting this contract, you must define both functions, invoking the
 * {Pausable-_pause} and {Pausable-_unpause} internal functions, with appropriate
 * access control, e.g. using {AccessControl} or {Ownable}. Not doing so will
 * make the contract pause mechanism of the contract unreachable, and thus unusable.
 */
abstract contract ERC20PausableUpgradeable is Initializable, ERC20Upgradeable, PausableUpgradeable {
    function __ERC20Pausable_init() internal onlyInitializing {
    }

    function __ERC20Pausable_init_unchained() internal onlyInitializing {
    }
    /**
     * @dev See {ERC20-_update}.
     *
     * Requirements:
     *
     * - the contract must not be paused.
     */
    function _update(address from, address to, uint256 value) internal virtual override whenNotPaused {
        super._update(from, to, value);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (token/ERC20/extensions/ERC4626.sol)

pragma solidity ^0.8.20;

import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import {IERC20Metadata} from "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol";
import {ERC20Upgradeable} from "../ERC20Upgradeable.sol";
import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import {IERC4626} from "@openzeppelin/contracts/interfaces/IERC4626.sol";
import {Math} from "@openzeppelin/contracts/utils/math/Math.sol";
import {Initializable} from "../../../proxy/utils/Initializable.sol";

/**
 * @dev Implementation of the ERC-4626 "Tokenized Vault Standard" as defined in
 * https://eips.ethereum.org/EIPS/eip-4626[ERC-4626].
 *
 * This extension allows the minting and burning of "shares" (represented using the ERC-20 inheritance) in exchange for
 * underlying "assets" through standardized {deposit}, {mint}, {redeem} and {burn} workflows. This contract extends
 * the ERC-20 standard. Any additional extensions included along it would affect the "shares" token represented by this
 * contract and not the "assets" token which is an independent contract.
 *
 * [CAUTION]
 * ====
 * In empty (or nearly empty) ERC-4626 vaults, deposits are at high risk of being stolen through frontrunning
 * with a "donation" to the vault that inflates the price of a share. This is variously known as a donation or inflation
 * attack and is essentially a problem of slippage. Vault deployers can protect against this attack by making an initial
 * deposit of a non-trivial amount of the asset, such that price manipulation becomes infeasible. Withdrawals may
 * similarly be affected by slippage. Users can protect against this attack as well as unexpected slippage in general by
 * verifying the amount received is as expected, using a wrapper that performs these checks such as
 * https://github.com/fei-protocol/ERC4626#erc4626router-and-base[ERC4626Router].
 *
 * Since v4.9, this implementation introduces configurable virtual assets and shares to help developers mitigate that risk.
 * The `_decimalsOffset()` corresponds to an offset in the decimal representation between the underlying asset's decimals
 * and the vault decimals. This offset also determines the rate of virtual shares to virtual assets in the vault, which
 * itself determines the initial exchange rate. While not fully preventing the attack, analysis shows that the default
 * offset (0) makes it non-profitable even if an attacker is able to capture value from multiple user deposits, as a result
 * of the value being captured by the virtual shares (out of the attacker's donation) matching the attacker's expected gains.
 * With a larger offset, the attack becomes orders of magnitude more expensive than it is profitable. More details about the
 * underlying math can be found xref:ROOT:erc4626.adoc#inflation-attack[here].
 *
 * The drawback of this approach is that the virtual shares do capture (a very small) part of the value being accrued
 * to the vault. Also, if the vault experiences losses, the users try to exit the vault, the virtual shares and assets
 * will cause the first user to exit to experience reduced losses in detriment to the last users that will experience
 * bigger losses. Developers willing to revert back to the pre-v4.9 behavior just need to override the
 * `_convertToShares` and `_convertToAssets` functions.
 *
 * To learn more, check out our xref:ROOT:erc4626.adoc[ERC-4626 guide].
 * ====
 */
abstract contract ERC4626Upgradeable is Initializable, ERC20Upgradeable, IERC4626 {
    using Math for uint256;

    /// @custom:storage-location erc7201:openzeppelin.storage.ERC4626
    struct ERC4626Storage {
        IERC20 _asset;
        uint8 _underlyingDecimals;
    }

    // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.ERC4626")) - 1)) & ~bytes32(uint256(0xff))
    bytes32 private constant ERC4626StorageLocation = 0x0773e532dfede91f04b12a73d3d2acd361424f41f76b4fb79f090161e36b4e00;

    function _getERC4626Storage() private pure returns (ERC4626Storage storage $) {
        assembly {
            $.slot := ERC4626StorageLocation
        }
    }

    /**
     * @dev Attempted to deposit more assets than the max amount for `receiver`.
     */
    error ERC4626ExceededMaxDeposit(address receiver, uint256 assets, uint256 max);

    /**
     * @dev Attempted to mint more shares than the max amount for `receiver`.
     */
    error ERC4626ExceededMaxMint(address receiver, uint256 shares, uint256 max);

    /**
     * @dev Attempted to withdraw more assets than the max amount for `receiver`.
     */
    error ERC4626ExceededMaxWithdraw(address owner, uint256 assets, uint256 max);

    /**
     * @dev Attempted to redeem more shares than the max amount for `receiver`.
     */
    error ERC4626ExceededMaxRedeem(address owner, uint256 shares, uint256 max);

    /**
     * @dev Set the underlying asset contract. This must be an ERC20-compatible contract (ERC-20 or ERC-777).
     */
    function __ERC4626_init(IERC20 asset_) internal onlyInitializing {
        __ERC4626_init_unchained(asset_);
    }

    function __ERC4626_init_unchained(IERC20 asset_) internal onlyInitializing {
        ERC4626Storage storage $ = _getERC4626Storage();
        (bool success, uint8 assetDecimals) = _tryGetAssetDecimals(asset_);
        $._underlyingDecimals = success ? assetDecimals : 18;
        $._asset = asset_;
    }

    /**
     * @dev Attempts to fetch the asset decimals. A return value of false indicates that the attempt failed in some way.
     */
    function _tryGetAssetDecimals(IERC20 asset_) private view returns (bool ok, uint8 assetDecimals) {
        (bool success, bytes memory encodedDecimals) = address(asset_).staticcall(
            abi.encodeCall(IERC20Metadata.decimals, ())
        );
        if (success && encodedDecimals.length >= 32) {
            uint256 returnedDecimals = abi.decode(encodedDecimals, (uint256));
            if (returnedDecimals <= type(uint8).max) {
                return (true, uint8(returnedDecimals));
            }
        }
        return (false, 0);
    }

    /**
     * @dev Decimals are computed by adding the decimal offset on top of the underlying asset's decimals. This
     * "original" value is cached during construction of the vault contract. If this read operation fails (e.g., the
     * asset has not been created yet), a default of 18 is used to represent the underlying asset's decimals.
     *
     * See {IERC20Metadata-decimals}.
     */
    function decimals() public view virtual override(IERC20Metadata, ERC20Upgradeable) returns (uint8) {
        ERC4626Storage storage $ = _getERC4626Storage();
        return $._underlyingDecimals + _decimalsOffset();
    }

    /// @inheritdoc IERC4626
    function asset() public view virtual returns (address) {
        ERC4626Storage storage $ = _getERC4626Storage();
        return address($._asset);
    }

    /// @inheritdoc IERC4626
    function totalAssets() public view virtual returns (uint256) {
        return IERC20(asset()).balanceOf(address(this));
    }

    /// @inheritdoc IERC4626
    function convertToShares(uint256 assets) public view virtual returns (uint256) {
        return _convertToShares(assets, Math.Rounding.Floor);
    }

    /// @inheritdoc IERC4626
    function convertToAssets(uint256 shares) public view virtual returns (uint256) {
        return _convertToAssets(shares, Math.Rounding.Floor);
    }

    /// @inheritdoc IERC4626
    function maxDeposit(address) public view virtual returns (uint256) {
        return type(uint256).max;
    }

    /// @inheritdoc IERC4626
    function maxMint(address) public view virtual returns (uint256) {
        return type(uint256).max;
    }

    /// @inheritdoc IERC4626
    function maxWithdraw(address owner) public view virtual returns (uint256) {
        return _convertToAssets(balanceOf(owner), Math.Rounding.Floor);
    }

    /// @inheritdoc IERC4626
    function maxRedeem(address owner) public view virtual returns (uint256) {
        return balanceOf(owner);
    }

    /// @inheritdoc IERC4626
    function previewDeposit(uint256 assets) public view virtual returns (uint256) {
        return _convertToShares(assets, Math.Rounding.Floor);
    }

    /// @inheritdoc IERC4626
    function previewMint(uint256 shares) public view virtual returns (uint256) {
        return _convertToAssets(shares, Math.Rounding.Ceil);
    }

    /// @inheritdoc IERC4626
    function previewWithdraw(uint256 assets) public view virtual returns (uint256) {
        return _convertToShares(assets, Math.Rounding.Ceil);
    }

    /// @inheritdoc IERC4626
    function previewRedeem(uint256 shares) public view virtual returns (uint256) {
        return _convertToAssets(shares, Math.Rounding.Floor);
    }

    /// @inheritdoc IERC4626
    function deposit(uint256 assets, address receiver) public virtual returns (uint256) {
        uint256 maxAssets = maxDeposit(receiver);
        if (assets > maxAssets) {
            revert ERC4626ExceededMaxDeposit(receiver, assets, maxAssets);
        }

        uint256 shares = previewDeposit(assets);
        _deposit(_msgSender(), receiver, assets, shares);

        return shares;
    }

    /// @inheritdoc IERC4626
    function mint(uint256 shares, address receiver) public virtual returns (uint256) {
        uint256 maxShares = maxMint(receiver);
        if (shares > maxShares) {
            revert ERC4626ExceededMaxMint(receiver, shares, maxShares);
        }

        uint256 assets = previewMint(shares);
        _deposit(_msgSender(), receiver, assets, shares);

        return assets;
    }

    /// @inheritdoc IERC4626
    function withdraw(uint256 assets, address receiver, address owner) public virtual returns (uint256) {
        uint256 maxAssets = maxWithdraw(owner);
        if (assets > maxAssets) {
            revert ERC4626ExceededMaxWithdraw(owner, assets, maxAssets);
        }

        uint256 shares = previewWithdraw(assets);
        _withdraw(_msgSender(), receiver, owner, assets, shares);

        return shares;
    }

    /// @inheritdoc IERC4626
    function redeem(uint256 shares, address receiver, address owner) public virtual returns (uint256) {
        uint256 maxShares = maxRedeem(owner);
        if (shares > maxShares) {
            revert ERC4626ExceededMaxRedeem(owner, shares, maxShares);
        }

        uint256 assets = previewRedeem(shares);
        _withdraw(_msgSender(), receiver, owner, assets, shares);

        return assets;
    }

    /**
     * @dev Internal conversion function (from assets to shares) with support for rounding direction.
     */
    function _convertToShares(uint256 assets, Math.Rounding rounding) internal view virtual returns (uint256) {
        return assets.mulDiv(totalSupply() + 10 ** _decimalsOffset(), totalAssets() + 1, rounding);
    }

    /**
     * @dev Internal conversion function (from shares to assets) with support for rounding direction.
     */
    function _convertToAssets(uint256 shares, Math.Rounding rounding) internal view virtual returns (uint256) {
        return shares.mulDiv(totalAssets() + 1, totalSupply() + 10 ** _decimalsOffset(), rounding);
    }

    /**
     * @dev Deposit/mint common workflow.
     */
    function _deposit(address caller, address receiver, uint256 assets, uint256 shares) internal virtual {
        // If asset() is ERC-777, `transferFrom` can trigger a reentrancy BEFORE the transfer happens through the
        // `tokensToSend` hook. On the other hand, the `tokenReceived` hook, that is triggered after the transfer,
        // calls the vault, which is assumed not malicious.
        //
        // Conclusion: we need to do the transfer before we mint so that any reentrancy would happen before the
        // assets are transferred and before the shares are minted, which is a valid state.
        // slither-disable-next-line reentrancy-no-eth
        SafeERC20.safeTransferFrom(IERC20(asset()), caller, address(this), assets);
        _mint(receiver, shares);

        emit Deposit(caller, receiver, assets, shares);
    }

    /**
     * @dev Withdraw/redeem common workflow.
     */
    function _withdraw(
        address caller,
        address receiver,
        address owner,
        uint256 assets,
        uint256 shares
    ) internal virtual {
        if (caller != owner) {
            _spendAllowance(owner, caller, shares);
        }

        // If asset() is ERC-777, `transfer` can trigger a reentrancy AFTER the transfer happens through the
        // `tokensReceived` hook. On the other hand, the `tokensToSend` hook, that is triggered before the transfer,
        // calls the vault, which is assumed not malicious.
        //
        // Conclusion: we need to do the transfer after the burn so that any reentrancy would happen after the
        // shares are burned and after the assets are transferred, which is a valid state.
        _burn(owner, shares);
        SafeERC20.safeTransfer(IERC20(asset()), receiver, assets);

        emit Withdraw(caller, receiver, owner, assets, shares);
    }

    function _decimalsOffset() internal view virtual returns (uint8) {
        return 0;
    }
}

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

pragma solidity ^0.8.20;
import {Initializable} from "../proxy/utils/Initializable.sol";

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

    function __Context_init_unchained() internal onlyInitializing {
    }
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.3.0) (utils/Pausable.sol)

pragma solidity ^0.8.20;

import {ContextUpgradeable} from "../utils/ContextUpgradeable.sol";
import {Initializable} from "../proxy/utils/Initializable.sol";

/**
 * @dev Contract module which allows children to implement an emergency stop
 * mechanism that can be triggered by an authorized account.
 *
 * This module is used through inheritance. It will make available the
 * modifiers `whenNotPaused` and `whenPaused`, which can be applied to
 * the functions of your contract. Note that they will not be pausable by
 * simply including this module, only once the modifiers are put in place.
 */
abstract contract PausableUpgradeable is Initializable, ContextUpgradeable {
    /// @custom:storage-location erc7201:openzeppelin.storage.Pausable
    struct PausableStorage {
        bool _paused;
    }

    // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.Pausable")) - 1)) & ~bytes32(uint256(0xff))
    bytes32 private constant PausableStorageLocation = 0xcd5ed15c6e187e77e9aee88184c21f4f2182ab5827cb3b7e07fbedcd63f03300;

    function _getPausableStorage() private pure returns (PausableStorage storage $) {
        assembly {
            $.slot := PausableStorageLocation
        }
    }

    /**
     * @dev Emitted when the pause is triggered by `account`.
     */
    event Paused(address account);

    /**
     * @dev Emitted when the pause is lifted by `account`.
     */
    event Unpaused(address account);

    /**
     * @dev The operation failed because the contract is paused.
     */
    error EnforcedPause();

    /**
     * @dev The operation failed because the contract is not paused.
     */
    error ExpectedPause();

    /**
     * @dev Modifier to make a function callable only when the contract is not paused.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    modifier whenNotPaused() {
        _requireNotPaused();
        _;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is paused.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    modifier whenPaused() {
        _requirePaused();
        _;
    }

    function __Pausable_init() internal onlyInitializing {
    }

    function __Pausable_init_unchained() internal onlyInitializing {
    }
    /**
     * @dev Returns true if the contract is paused, and false otherwise.
     */
    function paused() public view virtual returns (bool) {
        PausableStorage storage $ = _getPausableStorage();
        return $._paused;
    }

    /**
     * @dev Throws if the contract is paused.
     */
    function _requireNotPaused() internal view virtual {
        if (paused()) {
            revert EnforcedPause();
        }
    }

    /**
     * @dev Throws if the contract is not paused.
     */
    function _requirePaused() internal view virtual {
        if (!paused()) {
            revert ExpectedPause();
        }
    }

    /**
     * @dev Triggers stopped state.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    function _pause() internal virtual whenNotPaused {
        PausableStorage storage $ = _getPausableStorage();
        $._paused = true;
        emit Paused(_msgSender());
    }

    /**
     * @dev Returns to normal state.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    function _unpause() internal virtual whenPaused {
        PausableStorage storage $ = _getPausableStorage();
        $._paused = false;
        emit Unpaused(_msgSender());
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (interfaces/draft-IERC6093.sol)
pragma solidity >=0.8.4;

/**
 * @dev Standard ERC-20 Errors
 * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC-20 tokens.
 */
interface IERC20Errors {
    /**
     * @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 Standard ERC-721 Errors
 * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC-721 tokens.
 */
interface IERC721Errors {
    /**
     * @dev Indicates that an address can't be an owner. For example, `address(0)` is a forbidden owner in ERC-20.
     * Used in balance queries.
     * @param owner Address of the current owner of a token.
     */
    error ERC721InvalidOwner(address owner);

    /**
     * @dev Indicates a `tokenId` whose `owner` is the zero address.
     * @param tokenId Identifier number of a token.
     */
    error ERC721NonexistentToken(uint256 tokenId);

    /**
     * @dev Indicates an error related to the ownership over a particular token. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     * @param tokenId Identifier number of a token.
     * @param owner Address of the current owner of a token.
     */
    error ERC721IncorrectOwner(address sender, uint256 tokenId, address owner);

    /**
     * @dev Indicates a failure with the token `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     */
    error ERC721InvalidSender(address sender);

    /**
     * @dev Indicates a failure with the token `receiver`. Used in transfers.
     * @param receiver Address to which tokens are being transferred.
     */
    error ERC721InvalidReceiver(address receiver);

    /**
     * @dev Indicates a failure with the `operator`’s approval. Used in transfers.
     * @param operator Address that may be allowed to operate on tokens without being their owner.
     * @param tokenId Identifier number of a token.
     */
    error ERC721InsufficientApproval(address operator, uint256 tokenId);

    /**
     * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.
     * @param approver Address initiating an approval operation.
     */
    error ERC721InvalidApprover(address approver);

    /**
     * @dev Indicates a failure with the `operator` to be approved. Used in approvals.
     * @param operator Address that may be allowed to operate on tokens without being their owner.
     */
    error ERC721InvalidOperator(address operator);
}

/**
 * @dev Standard ERC-1155 Errors
 * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC-1155 tokens.
 */
interface IERC1155Errors {
    /**
     * @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.
     * @param tokenId Identifier number of a token.
     */
    error ERC1155InsufficientBalance(address sender, uint256 balance, uint256 needed, uint256 tokenId);

    /**
     * @dev Indicates a failure with the token `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     */
    error ERC1155InvalidSender(address sender);

    /**
     * @dev Indicates a failure with the token `receiver`. Used in transfers.
     * @param receiver Address to which tokens are being transferred.
     */
    error ERC1155InvalidReceiver(address receiver);

    /**
     * @dev Indicates a failure with the `operator`’s approval. Used in transfers.
     * @param operator Address that may be allowed to operate on tokens without being their owner.
     * @param owner Address of the current owner of a token.
     */
    error ERC1155MissingApprovalForAll(address operator, address owner);

    /**
     * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.
     * @param approver Address initiating an approval operation.
     */
    error ERC1155InvalidApprover(address approver);

    /**
     * @dev Indicates a failure with the `operator` to be approved. Used in approvals.
     * @param operator Address that may be allowed to operate on tokens without being their owner.
     */
    error ERC1155InvalidOperator(address operator);

    /**
     * @dev Indicates an array length mismatch between ids and values in a safeBatchTransferFrom operation.
     * Used in batch transfers.
     * @param idsLength Length of the array of token identifiers
     * @param valuesLength Length of the array of token amounts
     */
    error ERC1155InvalidArrayLength(uint256 idsLength, uint256 valuesLength);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (interfaces/IERC1363.sol)

pragma solidity >=0.6.2;

import {IERC20} from "./IERC20.sol";
import {IERC165} from "./IERC165.sol";

/**
 * @title IERC1363
 * @dev Interface of the ERC-1363 standard as defined in the https://eips.ethereum.org/EIPS/eip-1363[ERC-1363].
 *
 * Defines an extension interface for ERC-20 tokens that supports executing code on a recipient contract
 * after `transfer` or `transferFrom`, or code on a spender contract after `approve`, in a single transaction.
 */
interface IERC1363 is IERC20, IERC165 {
    /*
     * Note: the ERC-165 identifier for this interface is 0xb0202a11.
     * 0xb0202a11 ===
     *   bytes4(keccak256('transferAndCall(address,uint256)')) ^
     *   bytes4(keccak256('transferAndCall(address,uint256,bytes)')) ^
     *   bytes4(keccak256('transferFromAndCall(address,address,uint256)')) ^
     *   bytes4(keccak256('transferFromAndCall(address,address,uint256,bytes)')) ^
     *   bytes4(keccak256('approveAndCall(address,uint256)')) ^
     *   bytes4(keccak256('approveAndCall(address,uint256,bytes)'))
     */

    /**
     * @dev Moves a `value` amount of tokens from the caller's account to `to`
     * and then calls {IERC1363Receiver-onTransferReceived} on `to`.
     * @param to The address which you want to transfer to.
     * @param value The amount of tokens to be transferred.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function transferAndCall(address to, uint256 value) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from the caller's account to `to`
     * and then calls {IERC1363Receiver-onTransferReceived} on `to`.
     * @param to The address which you want to transfer to.
     * @param value The amount of tokens to be transferred.
     * @param data Additional data with no specified format, sent in call to `to`.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function transferAndCall(address to, uint256 value, bytes calldata data) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to` using the allowance mechanism
     * and then calls {IERC1363Receiver-onTransferReceived} on `to`.
     * @param from The address which you want to send tokens from.
     * @param to The address which you want to transfer to.
     * @param value The amount of tokens to be transferred.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function transferFromAndCall(address from, address to, uint256 value) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to` using the allowance mechanism
     * and then calls {IERC1363Receiver-onTransferReceived} on `to`.
     * @param from The address which you want to send tokens from.
     * @param to The address which you want to transfer to.
     * @param value The amount of tokens to be transferred.
     * @param data Additional data with no specified format, sent in call to `to`.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function transferFromAndCall(address from, address to, uint256 value, bytes calldata data) external returns (bool);

    /**
     * @dev Sets a `value` amount of tokens as the allowance of `spender` over the
     * caller's tokens and then calls {IERC1363Spender-onApprovalReceived} on `spender`.
     * @param spender The address which will spend the funds.
     * @param value The amount of tokens to be spent.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function approveAndCall(address spender, uint256 value) external returns (bool);

    /**
     * @dev Sets a `value` amount of tokens as the allowance of `spender` over the
     * caller's tokens and then calls {IERC1363Spender-onApprovalReceived} on `spender`.
     * @param spender The address which will spend the funds.
     * @param value The amount of tokens to be spent.
     * @param data Additional data with no specified format, sent in call to `spender`.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function approveAndCall(address spender, uint256 value, bytes calldata data) external returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (interfaces/IERC165.sol)

pragma solidity >=0.4.16;

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (interfaces/IERC20.sol)

pragma solidity >=0.4.16;

import {IERC20} from "../token/ERC20/IERC20.sol";

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (interfaces/IERC4626.sol)

pragma solidity >=0.6.2;

import {IERC20} from "../token/ERC20/IERC20.sol";
import {IERC20Metadata} from "../token/ERC20/extensions/IERC20Metadata.sol";

/**
 * @dev Interface of the ERC-4626 "Tokenized Vault Standard", as defined in
 * https://eips.ethereum.org/EIPS/eip-4626[ERC-4626].
 */
interface IERC4626 is IERC20, 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
    );

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

    /**
     * @dev Returns the total amount of the underlying asset that is “managed” by Vault.
     *
     * - 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);

    /**
     * @dev 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.
     *
     * - 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);

    /**
     * @dev 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.
     *
     * - 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);

    /**
     * @dev Returns the maximum amount of the underlying asset that can be deposited into the Vault for the receiver,
     * through a deposit call.
     *
     * - 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 view returns (uint256 maxAssets);

    /**
     * @dev Allows an on-chain or off-chain user to simulate the effects of their deposit at the current block, given
     * current on-chain conditions.
     *
     * - 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 view returns (uint256 shares);

    /**
     * @dev Mints shares Vault shares to receiver by depositing exactly amount of underlying tokens.
     *
     * - 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);

    /**
     * @dev Returns the maximum amount of the Vault shares that can be minted for the receiver, through a mint call.
     * - 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 view returns (uint256 maxShares);

    /**
     * @dev Allows an on-chain or off-chain user to simulate the effects of their mint at the current block, given
     * current on-chain conditions.
     *
     * - 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 view returns (uint256 assets);

    /**
     * @dev Mints exactly shares Vault shares to receiver by depositing amount of underlying tokens.
     *
     * - 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);

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

    /**
     * @dev Allows an on-chain or off-chain user to simulate the effects of their withdrawal at the current block,
     * given current on-chain conditions.
     *
     * - 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 view returns (uint256 shares);

    /**
     * @dev Burns shares from owner and sends exactly assets of underlying tokens to receiver.
     *
     * - 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);

    /**
     * @dev Returns the maximum amount of Vault shares that can be redeemed from the owner balance in the Vault,
     * through a redeem call.
     *
     * - 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 view returns (uint256 maxShares);

    /**
     * @dev Allows an on-chain or off-chain user to simulate the effects of their redemption at the current block,
     * given current on-chain conditions.
     *
     * - 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 view returns (uint256 assets);

    /**
     * @dev Burns exactly shares from owner and sends assets of underlying tokens to receiver.
     *
     * - 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: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity >=0.6.2;

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

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (token/ERC20/IERC20.sol)

pragma solidity >=0.4.16;

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

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

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

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

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

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.3.0) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.20;

import {IERC20} from "../IERC20.sol";
import {IERC1363} from "../../../interfaces/IERC1363.sol";

/**
 * @title SafeERC20
 * @dev Wrappers around ERC-20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
    /**
     * @dev An operation with an ERC-20 token failed.
     */
    error SafeERC20FailedOperation(address token);

    /**
     * @dev Indicates a failed `decreaseAllowance` request.
     */
    error SafeERC20FailedDecreaseAllowance(address spender, uint256 currentAllowance, uint256 requestedDecrease);

    /**
     * @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeTransfer(IERC20 token, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeCall(token.transfer, (to, value)));
    }

    /**
     * @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the
     * calling contract. If `token` returns no value, non-reverting calls are assumed to be successful.
     */
    function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeCall(token.transferFrom, (from, to, value)));
    }

    /**
     * @dev Variant of {safeTransfer} that returns a bool instead of reverting if the operation is not successful.
     */
    function trySafeTransfer(IERC20 token, address to, uint256 value) internal returns (bool) {
        return _callOptionalReturnBool(token, abi.encodeCall(token.transfer, (to, value)));
    }

    /**
     * @dev Variant of {safeTransferFrom} that returns a bool instead of reverting if the operation is not successful.
     */
    function trySafeTransferFrom(IERC20 token, address from, address to, uint256 value) internal returns (bool) {
        return _callOptionalReturnBool(token, abi.encodeCall(token.transferFrom, (from, to, value)));
    }

    /**
     * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     *
     * IMPORTANT: If the token implements ERC-7674 (ERC-20 with temporary allowance), and if the "client"
     * smart contract uses ERC-7674 to set temporary allowances, then the "client" smart contract should avoid using
     * this function. Performing a {safeIncreaseAllowance} or {safeDecreaseAllowance} operation on a token contract
     * that has a non-zero temporary allowance (for that particular owner-spender) will result in unexpected behavior.
     */
    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 oldAllowance = token.allowance(address(this), spender);
        forceApprove(token, spender, oldAllowance + value);
    }

    /**
     * @dev Decrease the calling contract's allowance toward `spender` by `requestedDecrease`. If `token` returns no
     * value, non-reverting calls are assumed to be successful.
     *
     * IMPORTANT: If the token implements ERC-7674 (ERC-20 with temporary allowance), and if the "client"
     * smart contract uses ERC-7674 to set temporary allowances, then the "client" smart contract should avoid using
     * this function. Performing a {safeIncreaseAllowance} or {safeDecreaseAllowance} operation on a token contract
     * that has a non-zero temporary allowance (for that particular owner-spender) will result in unexpected behavior.
     */
    function safeDecreaseAllowance(IERC20 token, address spender, uint256 requestedDecrease) internal {
        unchecked {
            uint256 currentAllowance = token.allowance(address(this), spender);
            if (currentAllowance < requestedDecrease) {
                revert SafeERC20FailedDecreaseAllowance(spender, currentAllowance, requestedDecrease);
            }
            forceApprove(token, spender, currentAllowance - requestedDecrease);
        }
    }

    /**
     * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval
     * to be set to zero before setting it to a non-zero value, such as USDT.
     *
     * NOTE: If the token implements ERC-7674, this function will not modify any temporary allowance. This function
     * only sets the "standard" allowance. Any temporary allowance will remain active, in addition to the value being
     * set here.
     */
    function forceApprove(IERC20 token, address spender, uint256 value) internal {
        bytes memory approvalCall = abi.encodeCall(token.approve, (spender, value));

        if (!_callOptionalReturnBool(token, approvalCall)) {
            _callOptionalReturn(token, abi.encodeCall(token.approve, (spender, 0)));
            _callOptionalReturn(token, approvalCall);
        }
    }

    /**
     * @dev Performs an {ERC1363} transferAndCall, with a fallback to the simple {ERC20} transfer if the target has no
     * code. This can be used to implement an {ERC721}-like safe transfer that rely on {ERC1363} checks when
     * targeting contracts.
     *
     * Reverts if the returned value is other than `true`.
     */
    function transferAndCallRelaxed(IERC1363 token, address to, uint256 value, bytes memory data) internal {
        if (to.code.length == 0) {
            safeTransfer(token, to, value);
        } else if (!token.transferAndCall(to, value, data)) {
            revert SafeERC20FailedOperation(address(token));
        }
    }

    /**
     * @dev Performs an {ERC1363} transferFromAndCall, with a fallback to the simple {ERC20} transferFrom if the target
     * has no code. This can be used to implement an {ERC721}-like safe transfer that rely on {ERC1363} checks when
     * targeting contracts.
     *
     * Reverts if the returned value is other than `true`.
     */
    function transferFromAndCallRelaxed(
        IERC1363 token,
        address from,
        address to,
        uint256 value,
        bytes memory data
    ) internal {
        if (to.code.length == 0) {
            safeTransferFrom(token, from, to, value);
        } else if (!token.transferFromAndCall(from, to, value, data)) {
            revert SafeERC20FailedOperation(address(token));
        }
    }

    /**
     * @dev Performs an {ERC1363} approveAndCall, with a fallback to the simple {ERC20} approve if the target has no
     * code. This can be used to implement an {ERC721}-like safe transfer that rely on {ERC1363} checks when
     * targeting contracts.
     *
     * NOTE: When the recipient address (`to`) has no code (i.e. is an EOA), this function behaves as {forceApprove}.
     * Opposedly, when the recipient address (`to`) has code, this function only attempts to call {ERC1363-approveAndCall}
     * once without retrying, and relies on the returned value to be true.
     *
     * Reverts if the returned value is other than `true`.
     */
    function approveAndCallRelaxed(IERC1363 token, address to, uint256 value, bytes memory data) internal {
        if (to.code.length == 0) {
            forceApprove(token, to, value);
        } else if (!token.approveAndCall(to, value, data)) {
            revert SafeERC20FailedOperation(address(token));
        }
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     *
     * This is a variant of {_callOptionalReturnBool} that reverts if call fails to meet the requirements.
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        uint256 returnSize;
        uint256 returnValue;
        assembly ("memory-safe") {
            let success := call(gas(), token, 0, add(data, 0x20), mload(data), 0, 0x20)
            // bubble errors
            if iszero(success) {
                let ptr := mload(0x40)
                returndatacopy(ptr, 0, returndatasize())
                revert(ptr, returndatasize())
            }
            returnSize := returndatasize()
            returnValue := mload(0)
        }

        if (returnSize == 0 ? address(token).code.length == 0 : returnValue != 1) {
            revert SafeERC20FailedOperation(address(token));
        }
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     *
     * This is a variant of {_callOptionalReturn} that silently catches all reverts and returns a bool instead.
     */
    function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) {
        bool success;
        uint256 returnSize;
        uint256 returnValue;
        assembly ("memory-safe") {
            success := call(gas(), token, 0, add(data, 0x20), mload(data), 0, 0x20)
            returnSize := returndatasize()
            returnValue := mload(0)
        }
        return success && (returnSize == 0 ? address(token).code.length > 0 : returnValue == 1);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (utils/introspection/IERC165.sol)

pragma solidity >=0.4.16;

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.3.0) (utils/math/Math.sol)

pragma solidity ^0.8.20;

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

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

    /**
     * @dev Return the 512-bit addition of two uint256.
     *
     * The result is stored in two 256 variables such that sum = high * 2²⁵⁶ + low.
     */
    function add512(uint256 a, uint256 b) internal pure returns (uint256 high, uint256 low) {
        assembly ("memory-safe") {
            low := add(a, b)
            high := lt(low, a)
        }
    }

    /**
     * @dev Return the 512-bit multiplication of two uint256.
     *
     * The result is stored in two 256 variables such that product = high * 2²⁵⁶ + low.
     */
    function mul512(uint256 a, uint256 b) internal pure returns (uint256 high, uint256 low) {
        // 512-bit multiply [high low] = x * y. Compute the product mod 2²⁵⁶ and mod 2²⁵⁶ - 1, then use
        // the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256
        // variables such that product = high * 2²⁵⁶ + low.
        assembly ("memory-safe") {
            let mm := mulmod(a, b, not(0))
            low := mul(a, b)
            high := sub(sub(mm, low), lt(mm, low))
        }
    }

    /**
     * @dev Returns the addition of two unsigned integers, with a success flag (no overflow).
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool success, uint256 result) {
        unchecked {
            uint256 c = a + b;
            success = c >= a;
            result = c * SafeCast.toUint(success);
        }
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, with a success flag (no overflow).
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool success, uint256 result) {
        unchecked {
            uint256 c = a - b;
            success = c <= a;
            result = c * SafeCast.toUint(success);
        }
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with a success flag (no overflow).
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool success, uint256 result) {
        unchecked {
            uint256 c = a * b;
            assembly ("memory-safe") {
                // Only true when the multiplication doesn't overflow
                // (c / a == b) || (a == 0)
                success := or(eq(div(c, a), b), iszero(a))
            }
            // equivalent to: success ? c : 0
            result = c * SafeCast.toUint(success);
        }
    }

    /**
     * @dev Returns the division of two unsigned integers, with a success flag (no division by zero).
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool success, uint256 result) {
        unchecked {
            success = b > 0;
            assembly ("memory-safe") {
                // The `DIV` opcode returns zero when the denominator is 0.
                result := div(a, b)
            }
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a success flag (no division by zero).
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool success, uint256 result) {
        unchecked {
            success = b > 0;
            assembly ("memory-safe") {
                // The `MOD` opcode returns zero when the denominator is 0.
                result := mod(a, b)
            }
        }
    }

    /**
     * @dev Unsigned saturating addition, bounds to `2²⁵⁶ - 1` instead of overflowing.
     */
    function saturatingAdd(uint256 a, uint256 b) internal pure returns (uint256) {
        (bool success, uint256 result) = tryAdd(a, b);
        return ternary(success, result, type(uint256).max);
    }

    /**
     * @dev Unsigned saturating subtraction, bounds to zero instead of overflowing.
     */
    function saturatingSub(uint256 a, uint256 b) internal pure returns (uint256) {
        (, uint256 result) = trySub(a, b);
        return result;
    }

    /**
     * @dev Unsigned saturating multiplication, bounds to `2²⁵⁶ - 1` instead of overflowing.
     */
    function saturatingMul(uint256 a, uint256 b) internal pure returns (uint256) {
        (bool success, uint256 result) = tryMul(a, b);
        return ternary(success, result, type(uint256).max);
    }

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

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

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

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

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

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

    /**
     * @dev Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or
     * denominator == 0.
     *
     * Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv) with further edits by
     * Uniswap Labs also under MIT license.
     */
    function mulDiv(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result) {
        unchecked {
            (uint256 high, uint256 low) = mul512(x, y);

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

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

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

            // Make division exact by subtracting the remainder from [high low].
            uint256 remainder;
            assembly ("memory-safe") {
                // Compute remainder using mulmod.
                remainder := mulmod(x, y, denominator)

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

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

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

                // Divide [high low] by twos.
                low := div(low, twos)

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

            // Shift in bits from high into low.
            low |= high * twos;

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

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

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

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

    /**
     * @dev Calculates floor(x * y >> n) with full precision. Throws if result overflows a uint256.
     */
    function mulShr(uint256 x, uint256 y, uint8 n) internal pure returns (uint256 result) {
        unchecked {
            (uint256 high, uint256 low) = mul512(x, y);
            if (high >= 1 << n) {
                Panic.panic(Panic.UNDER_OVERFLOW);
            }
            return (high << (256 - n)) | (low >> n);
        }
    }

    /**
     * @dev Calculates x * y >> n with full precision, following the selected rounding direction.
     */
    function mulShr(uint256 x, uint256 y, uint8 n, Rounding rounding) internal pure returns (uint256) {
        return mulShr(x, y, n) + SafeCast.toUint(unsignedRoundsUp(rounding) && mulmod(x, y, 1 << n) > 0);
    }

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

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

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

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

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

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

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

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

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

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

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

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

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

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

        uint256 mLen = m.length;

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

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

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

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

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

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

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

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

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

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

    /**
     * @dev Return the log in base 2 of a positive value rounded towards zero.
     * Returns 0 if given 0.
     */
    function log2(uint256 x) internal pure returns (uint256 r) {
        // If value has upper 128 bits set, log2 result is at least 128
        r = SafeCast.toUint(x > 0xffffffffffffffffffffffffffffffff) << 7;
        // If upper 64 bits of 128-bit half set, add 64 to result
        r |= SafeCast.toUint((x >> r) > 0xffffffffffffffff) << 6;
        // If upper 32 bits of 64-bit half set, add 32 to result
        r |= SafeCast.toUint((x >> r) > 0xffffffff) << 5;
        // If upper 16 bits of 32-bit half set, add 16 to result
        r |= SafeCast.toUint((x >> r) > 0xffff) << 4;
        // If upper 8 bits of 16-bit half set, add 8 to result
        r |= SafeCast.toUint((x >> r) > 0xff) << 3;
        // If upper 4 bits of 8-bit half set, add 4 to result
        r |= SafeCast.toUint((x >> r) > 0xf) << 2;

        // Shifts value right by the current result and use it as an index into this lookup table:
        //
        // | x (4 bits) |  index  | table[index] = MSB position |
        // |------------|---------|-----------------------------|
        // |    0000    |    0    |        table[0] = 0         |
        // |    0001    |    1    |        table[1] = 0         |
        // |    0010    |    2    |        table[2] = 1         |
        // |    0011    |    3    |        table[3] = 1         |
        // |    0100    |    4    |        table[4] = 2         |
        // |    0101    |    5    |        table[5] = 2         |
        // |    0110    |    6    |        table[6] = 2         |
        // |    0111    |    7    |        table[7] = 2         |
        // |    1000    |    8    |        table[8] = 3         |
        // |    1001    |    9    |        table[9] = 3         |
        // |    1010    |   10    |        table[10] = 3        |
        // |    1011    |   11    |        table[11] = 3        |
        // |    1100    |   12    |        table[12] = 3        |
        // |    1101    |   13    |        table[13] = 3        |
        // |    1110    |   14    |        table[14] = 3        |
        // |    1111    |   15    |        table[15] = 3        |
        //
        // The lookup table is represented as a 32-byte value with the MSB positions for 0-15 in the last 16 bytes.
        assembly ("memory-safe") {
            r := or(r, byte(shr(r, x), 0x0000010102020202030303030303030300000000000000000000000000000000))
        }
    }

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

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

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

    /**
     * @dev Return the log in base 256 of a positive value rounded towards zero.
     * Returns 0 if given 0.
     *
     * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.
     */
    function log256(uint256 x) internal pure returns (uint256 r) {
        // If value has upper 128 bits set, log2 result is at least 128
        r = SafeCast.toUint(x > 0xffffffffffffffffffffffffffffffff) << 7;
        // If upper 64 bits of 128-bit half set, add 64 to result
        r |= SafeCast.toUint((x >> r) > 0xffffffffffffffff) << 6;
        // If upper 32 bits of 64-bit half set, add 32 to result
        r |= SafeCast.toUint((x >> r) > 0xffffffff) << 5;
        // If upper 16 bits of 32-bit half set, add 16 to result
        r |= SafeCast.toUint((x >> r) > 0xffff) << 4;
        // Add 1 if upper 8 bits of 16-bit half set, and divide accumulated result by 8
        return (r >> 3) | SafeCast.toUint((x >> r) > 0xff);
    }

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

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

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

pragma solidity ^0.8.20;

/**
 * @dev Wrappers over Solidity's uintXX/intXX/bool casting operators with added overflow
 * checks.
 *
 * Downcasting from uint256/int256 in Solidity does not revert on overflow. This can
 * easily result in undesired exploitation or bugs, since developers usually
 * assume that overflows raise errors. `SafeCast` restores this intuition by
 * reverting the transaction when such an operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeCast {
    /**
     * @dev Value doesn't fit in an uint of `bits` size.
     */
    error SafeCastOverflowedUintDowncast(uint8 bits, uint256 value);

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

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

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

    /**
     * @dev Returns the downcasted uint248 from uint256, reverting on
     * overflow (when the input is greater than largest uint248).
     *
     * Counterpart to Solidity's `uint248` operator.
     *
     * Requirements:
     *
     * - input must fit into 248 bits
     */
    function toUint248(uint256 value) internal pure returns (uint248) {
        if (value > type(uint248).max) {
            revert SafeCastOverflowedUintDowncast(248, value);
        }
        return uint248(value);
    }

    /**
     * @dev Returns the downcasted uint240 from uint256, reverting on
     * overflow (when the input is greater than largest uint240).
     *
     * Counterpart to Solidity's `uint240` operator.
     *
     * Requirements:
     *
     * - input must fit into 240 bits
     */
    function toUint240(uint256 value) internal pure returns (uint240) {
        if (value > type(uint240).max) {
            revert SafeCastOverflowedUintDowncast(240, value);
        }
        return uint240(value);
    }

    /**
     * @dev Returns the downcasted uint232 from uint256, reverting on
     * overflow (when the input is greater than largest uint232).
     *
     * Counterpart to Solidity's `uint232` operator.
     *
     * Requirements:
     *
     * - input must fit into 232 bits
     */
    function toUint232(uint256 value) internal pure returns (uint232) {
        if (value > type(uint232).max) {
            revert SafeCastOverflowedUintDowncast(232, value);
        }
        return uint232(value);
    }

    /**
     * @dev Returns the downcasted uint224 from uint256, reverting on
     * overflow (when the input is greater than largest uint224).
     *
     * Counterpart to Solidity's `uint224` operator.
     *
     * Requirements:
     *
     * - input must fit into 224 bits
     */
    function toUint224(uint256 value) internal pure returns (uint224) {
        if (value > type(uint224).max) {
            revert SafeCastOverflowedUintDowncast(224, value);
        }
        return uint224(value);
    }

    /**
     * @dev Returns the downcasted uint216 from uint256, reverting on
     * overflow (when the input is greater than largest uint216).
     *
     * Counterpart to Solidity's `uint216` operator.
     *
     * Requirements:
     *
     * - input must fit into 216 bits
     */
    function toUint216(uint256 value) internal pure returns (uint216) {
        if (value > type(uint216).max) {
            revert SafeCastOverflowedUintDowncast(216, value);
        }
        return uint216(value);
    }

    /**
     * @dev Returns the downcasted uint208 from uint256, reverting on
     * overflow (when the input is greater than largest uint208).
     *
     * Counterpart to Solidity's `uint208` operator.
     *
     * Requirements:
     *
     * - input must fit into 208 bits
     */
    function toUint208(uint256 value) internal pure returns (uint208) {
        if (value > type(uint208).max) {
            revert SafeCastOverflowedUintDowncast(208, value);
        }
        return uint208(value);
    }

    /**
     * @dev Returns the downcasted uint200 from uint256, reverting on
     * overflow (when the input is greater than largest uint200).
     *
     * Counterpart to Solidity's `uint200` operator.
     *
     * Requirements:
     *
     * - input must fit into 200 bits
     */
    function toUint200(uint256 value) internal pure returns (uint200) {
        if (value > type(uint200).max) {
            revert SafeCastOverflowedUintDowncast(200, value);
        }
        return uint200(value);
    }

    /**
     * @dev Returns the downcasted uint192 from uint256, reverting on
     * overflow (when the input is greater than largest uint192).
     *
     * Counterpart to Solidity's `uint192` operator.
     *
     * Requirements:
     *
     * - input must fit into 192 bits
     */
    function toUint192(uint256 value) internal pure returns (uint192) {
        if (value > type(uint192).max) {
            revert SafeCastOverflowedUintDowncast(192, value);
        }
        return uint192(value);
    }

    /**
     * @dev Returns the downcasted uint184 from uint256, reverting on
     * overflow (when the input is greater than largest uint184).
     *
     * Counterpart to Solidity's `uint184` operator.
     *
     * Requirements:
     *
     * - input must fit into 184 bits
     */
    function toUint184(uint256 value) internal pure returns (uint184) {
        if (value > type(uint184).max) {
            revert SafeCastOverflowedUintDowncast(184, value);
        }
        return uint184(value);
    }

    /**
     * @dev Returns the downcasted uint176 from uint256, reverting on
     * overflow (when the input is greater than largest uint176).
     *
     * Counterpart to Solidity's `uint176` operator.
     *
     * Requirements:
     *
     * - input must fit into 176 bits
     */
    function toUint176(uint256 value) internal pure returns (uint176) {
        if (value > type(uint176).max) {
            revert SafeCastOverflowedUintDowncast(176, value);
        }
        return uint176(value);
    }

    /**
     * @dev Returns the downcasted uint168 from uint256, reverting on
     * overflow (when the input is greater than largest uint168).
     *
     * Counterpart to Solidity's `uint168` operator.
     *
     * Requirements:
     *
     * - input must fit into 168 bits
     */
    function toUint168(uint256 value) internal pure returns (uint168) {
        if (value > type(uint168).max) {
            revert SafeCastOverflowedUintDowncast(168, value);
        }
        return uint168(value);
    }

    /**
     * @dev Returns the downcasted uint160 from uint256, reverting on
     * overflow (when the input is greater than largest uint160).
     *
     * Counterpart to Solidity's `uint160` operator.
     *
     * Requirements:
     *
     * - input must fit into 160 bits
     */
    function toUint160(uint256 value) internal pure returns (uint160) {
        if (value > type(uint160).max) {
            revert SafeCastOverflowedUintDowncast(160, value);
        }
        return uint160(value);
    }

    /**
     * @dev Returns the downcasted uint152 from uint256, reverting on
     * overflow (when the input is greater than largest uint152).
     *
     * Counterpart to Solidity's `uint152` operator.
     *
     * Requirements:
     *
     * - input must fit into 152 bits
     */
    function toUint152(uint256 value) internal pure returns (uint152) {
        if (value > type(uint152).max) {
            revert SafeCastOverflowedUintDowncast(152, value);
        }
        return uint152(value);
    }

    /**
     * @dev Returns the downcasted uint144 from uint256, reverting on
     * overflow (when the input is greater than largest uint144).
     *
     * Counterpart to Solidity's `uint144` operator.
     *
     * Requirements:
     *
     * - input must fit into 144 bits
     */
    function toUint144(uint256 value) internal pure returns (uint144) {
        if (value > type(uint144).max) {
            revert SafeCastOverflowedUintDowncast(144, value);
        }
        return uint144(value);
    }

    /**
     * @dev Returns the downcasted uint136 from uint256, reverting on
     * overflow (when the input is greater than largest uint136).
     *
     * Counterpart to Solidity's `uint136` operator.
     *
     * Requirements:
     *
     * - input must fit into 136 bits
     */
    function toUint136(uint256 value) internal pure returns (uint136) {
        if (value > type(uint136).max) {
            revert SafeCastOverflowedUintDowncast(136, value);
        }
        return uint136(value);
    }

    /**
     * @dev Returns the downcasted uint128 from uint256, reverting on
     * overflow (when the input is greater than largest uint128).
     *
     * Counterpart to Solidity's `uint128` operator.
     *
     * Requirements:
     *
     * - input must fit into 128 bits
     */
    function toUint128(uint256 value) internal pure returns (uint128) {
        if (value > type(uint128).max) {
            revert SafeCastOverflowedUintDowncast(128, value);
        }
        return uint128(value);
    }

    /**
     * @dev Returns the downcasted uint120 from uint256, reverting on
     * overflow (when the input is greater than largest uint120).
     *
     * Counterpart to Solidity's `uint120` operator.
     *
     * Requirements:
     *
     * - input must fit into 120 bits
     */
    function toUint120(uint256 value) internal pure returns (uint120) {
        if (value > type(uint120).max) {
            revert SafeCastOverflowedUintDowncast(120, value);
        }
        return uint120(value);
    }

    /**
     * @dev Returns the downcasted uint112 from uint256, reverting on
     * overflow (when the input is greater than largest uint112).
     *
     * Counterpart to Solidity's `uint112` operator.
     *
     * Requirements:
     *
     * - input must fit into 112 bits
     */
    function toUint112(uint256 value) internal pure returns (uint112) {
        if (value > type(uint112).max) {
            revert SafeCastOverflowedUintDowncast(112, value);
        }
        return uint112(value);
    }

    /**
     * @dev Returns the downcasted uint104 from uint256, reverting on
     * overflow (when the input is greater than largest uint104).
     *
     * Counterpart to Solidity's `uint104` operator.
     *
     * Requirements:
     *
     * - input must fit into 104 bits
     */
    function toUint104(uint256 value) internal pure returns (uint104) {
        if (value > type(uint104).max) {
            revert SafeCastOverflowedUintDowncast(104, value);
        }
        return uint104(value);
    }

    /**
     * @dev Returns the downcasted uint96 from uint256, reverting on
     * overflow (when the input is greater than largest uint96).
     *
     * Counterpart to Solidity's `uint96` operator.
     *
     * Requirements:
     *
     * - input must fit into 96 bits
     */
    function toUint96(uint256 value) internal pure returns (uint96) {
        if (value > type(uint96).max) {
            revert SafeCastOverflowedUintDowncast(96, value);
        }
        return uint96(value);
    }

    /**
     * @dev Returns the downcasted uint88 from uint256, reverting on
     * overflow (when the input is greater than largest uint88).
     *
     * Counterpart to Solidity's `uint88` operator.
     *
     * Requirements:
     *
     * - input must fit into 88 bits
     */
    function toUint88(uint256 value) internal pure returns (uint88) {
        if (value > type(uint88).max) {
            revert SafeCastOverflowedUintDowncast(88, value);
        }
        return uint88(value);
    }

    /**
     * @dev Returns the downcasted uint80 from uint256, reverting on
     * overflow (when the input is greater than largest uint80).
     *
     * Counterpart to Solidity's `uint80` operator.
     *
     * Requirements:
     *
     * - input must fit into 80 bits
     */
    function toUint80(uint256 value) internal pure returns (uint80) {
        if (value > type(uint80).max) {
            revert SafeCastOverflowedUintDowncast(80, value);
        }
        return uint80(value);
    }

    /**
     * @dev Returns the downcasted uint72 from uint256, reverting on
     * overflow (when the input is greater than largest uint72).
     *
     * Counterpart to Solidity's `uint72` operator.
     *
     * Requirements:
     *
     * - input must fit into 72 bits
     */
    function toUint72(uint256 value) internal pure returns (uint72) {
        if (value > type(uint72).max) {
            revert SafeCastOverflowedUintDowncast(72, value);
        }
        return uint72(value);
    }

    /**
     * @dev Returns the downcasted uint64 from uint256, reverting on
     * overflow (when the input is greater than largest uint64).
     *
     * Counterpart to Solidity's `uint64` operator.
     *
     * Requirements:
     *
     * - input must fit into 64 bits
     */
    function toUint64(uint256 value) internal pure returns (uint64) {
        if (value > type(uint64).max) {
            revert SafeCastOverflowedUintDowncast(64, value);
        }
        return uint64(value);
    }

    /**
     * @dev Returns the downcasted uint56 from uint256, reverting on
     * overflow (when the input is greater than largest uint56).
     *
     * Counterpart to Solidity's `uint56` operator.
     *
     * Requirements:
     *
     * - input must fit into 56 bits
     */
    function toUint56(uint256 value) internal pure returns (uint56) {
        if (value > type(uint56).max) {
            revert SafeCastOverflowedUintDowncast(56, value);
        }
        return uint56(value);
    }

    /**
     * @dev Returns the downcasted uint48 from uint256, reverting on
     * overflow (when the input is greater than largest uint48).
     *
     * Counterpart to Solidity's `uint48` operator.
     *
     * Requirements:
     *
     * - input must fit into 48 bits
     */
    function toUint48(uint256 value) internal pure returns (uint48) {
        if (value > type(uint48).max) {
            revert SafeCastOverflowedUintDowncast(48, value);
        }
        return uint48(value);
    }

    /**
     * @dev Returns the downcasted uint40 from uint256, reverting on
     * overflow (when the input is greater than largest uint40).
     *
     * Counterpart to Solidity's `uint40` operator.
     *
     * Requirements:
     *
     * - input must fit into 40 bits
     */
    function toUint40(uint256 value) internal pure returns (uint40) {
        if (value > type(uint40).max) {
            revert SafeCastOverflowedUintDowncast(40, value);
        }
        return uint40(value);
    }

    /**
     * @dev Returns the downcasted uint32 from uint256, reverting on
     * overflow (when the input is greater than largest uint32).
     *
     * Counterpart to Solidity's `uint32` operator.
     *
     * Requirements:
     *
     * - input must fit into 32 bits
     */
    function toUint32(uint256 value) internal pure returns (uint32) {
        if (value > type(uint32).max) {
            revert SafeCastOverflowedUintDowncast(32, value);
        }
        return uint32(value);
    }

    /**
     * @dev Returns the downcasted uint24 from uint256, reverting on
     * overflow (when the input is greater than largest uint24).
     *
     * Counterpart to Solidity's `uint24` operator.
     *
     * Requirements:
     *
     * - input must fit into 24 bits
     */
    function toUint24(uint256 value) internal pure returns (uint24) {
        if (value > type(uint24).max) {
            revert SafeCastOverflowedUintDowncast(24, value);
        }
        return uint24(value);
    }

    /**
     * @dev Returns the downcasted uint16 from uint256, reverting on
     * overflow (when the input is greater than largest uint16).
     *
     * Counterpart to Solidity's `uint16` operator.
     *
     * Requirements:
     *
     * - input must fit into 16 bits
     */
    function toUint16(uint256 value) internal pure returns (uint16) {
        if (value > type(uint16).max) {
            revert SafeCastOverflowedUintDowncast(16, value);
        }
        return uint16(value);
    }

    /**
     * @dev Returns the downcasted uint8 from uint256, reverting on
     * overflow (when the input is greater than largest uint8).
     *
     * Counterpart to Solidity's `uint8` operator.
     *
     * Requirements:
     *
     * - input must fit into 8 bits
     */
    function toUint8(uint256 value) internal pure returns (uint8) {
        if (value > type(uint8).max) {
            revert SafeCastOverflowedUintDowncast(8, value);
        }
        return uint8(value);
    }

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

    /**
     * @dev Returns the downcasted int248 from int256, reverting on
     * overflow (when the input is less than smallest int248 or
     * greater than largest int248).
     *
     * Counterpart to Solidity's `int248` operator.
     *
     * Requirements:
     *
     * - input must fit into 248 bits
     */
    function toInt248(int256 value) internal pure returns (int248 downcasted) {
        downcasted = int248(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(248, value);
        }
    }

    /**
     * @dev Returns the downcasted int240 from int256, reverting on
     * overflow (when the input is less than smallest int240 or
     * greater than largest int240).
     *
     * Counterpart to Solidity's `int240` operator.
     *
     * Requirements:
     *
     * - input must fit into 240 bits
     */
    function toInt240(int256 value) internal pure returns (int240 downcasted) {
        downcasted = int240(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(240, value);
        }
    }

    /**
     * @dev Returns the downcasted int232 from int256, reverting on
     * overflow (when the input is less than smallest int232 or
     * greater than largest int232).
     *
     * Counterpart to Solidity's `int232` operator.
     *
     * Requirements:
     *
     * - input must fit into 232 bits
     */
    function toInt232(int256 value) internal pure returns (int232 downcasted) {
        downcasted = int232(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(232, value);
        }
    }

    /**
     * @dev Returns the downcasted int224 from int256, reverting on
     * overflow (when the input is less than smallest int224 or
     * greater than largest int224).
     *
     * Counterpart to Solidity's `int224` operator.
     *
     * Requirements:
     *
     * - input must fit into 224 bits
     */
    function toInt224(int256 value) internal pure returns (int224 downcasted) {
        downcasted = int224(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(224, value);
        }
    }

    /**
     * @dev Returns the downcasted int216 from int256, reverting on
     * overflow (when the input is less than smallest int216 or
     * greater than largest int216).
     *
     * Counterpart to Solidity's `int216` operator.
     *
     * Requirements:
     *
     * - input must fit into 216 bits
     */
    function toInt216(int256 value) internal pure returns (int216 downcasted) {
        downcasted = int216(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(216, value);
        }
    }

    /**
     * @dev Returns the downcasted int208 from int256, reverting on
     * overflow (when the input is less than smallest int208 or
     * greater than largest int208).
     *
     * Counterpart to Solidity's `int208` operator.
     *
     * Requirements:
     *
     * - input must fit into 208 bits
     */
    function toInt208(int256 value) internal pure returns (int208 downcasted) {
        downcasted = int208(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(208, value);
        }
    }

    /**
     * @dev Returns the downcasted int200 from int256, reverting on
     * overflow (when the input is less than smallest int200 or
     * greater than largest int200).
     *
     * Counterpart to Solidity's `int200` operator.
     *
     * Requirements:
     *
     * - input must fit into 200 bits
     */
    function toInt200(int256 value) internal pure returns (int200 downcasted) {
        downcasted = int200(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(200, value);
        }
    }

    /**
     * @dev Returns the downcasted int192 from int256, reverting on
     * overflow (when the input is less than smallest int192 or
     * greater than largest int192).
     *
     * Counterpart to Solidity's `int192` operator.
     *
     * Requirements:
     *
     * - input must fit into 192 bits
     */
    function toInt192(int256 value) internal pure returns (int192 downcasted) {
        downcasted = int192(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(192, value);
        }
    }

    /**
     * @dev Returns the downcasted int184 from int256, reverting on
     * overflow (when the input is less than smallest int184 or
     * greater than largest int184).
     *
     * Counterpart to Solidity's `int184` operator.
     *
     * Requirements:
     *
     * - input must fit into 184 bits
     */
    function toInt184(int256 value) internal pure returns (int184 downcasted) {
        downcasted = int184(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(184, value);
        }
    }

    /**
     * @dev Returns the downcasted int176 from int256, reverting on
     * overflow (when the input is less than smallest int176 or
     * greater than largest int176).
     *
     * Counterpart to Solidity's `int176` operator.
     *
     * Requirements:
     *
     * - input must fit into 176 bits
     */
    function toInt176(int256 value) internal pure returns (int176 downcasted) {
        downcasted = int176(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(176, value);
        }
    }

    /**
     * @dev Returns the downcasted int168 from int256, reverting on
     * overflow (when the input is less than smallest int168 or
     * greater than largest int168).
     *
     * Counterpart to Solidity's `int168` operator.
     *
     * Requirements:
     *
     * - input must fit into 168 bits
     */
    function toInt168(int256 value) internal pure returns (int168 downcasted) {
        downcasted = int168(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(168, value);
        }
    }

    /**
     * @dev Returns the downcasted int160 from int256, reverting on
     * overflow (when the input is less than smallest int160 or
     * greater than largest int160).
     *
     * Counterpart to Solidity's `int160` operator.
     *
     * Requirements:
     *
     * - input must fit into 160 bits
     */
    function toInt160(int256 value) internal pure returns (int160 downcasted) {
        downcasted = int160(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(160, value);
        }
    }

    /**
     * @dev Returns the downcasted int152 from int256, reverting on
     * overflow (when the input is less than smallest int152 or
     * greater than largest int152).
     *
     * Counterpart to Solidity's `int152` operator.
     *
     * Requirements:
     *
     * - input must fit into 152 bits
     */
    function toInt152(int256 value) internal pure returns (int152 downcasted) {
        downcasted = int152(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(152, value);
        }
    }

    /**
     * @dev Returns the downcasted int144 from int256, reverting on
     * overflow (when the input is less than smallest int144 or
     * greater than largest int144).
     *
     * Counterpart to Solidity's `int144` operator.
     *
     * Requirements:
     *
     * - input must fit into 144 bits
     */
    function toInt144(int256 value) internal pure returns (int144 downcasted) {
        downcasted = int144(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(144, value);
        }
    }

    /**
     * @dev Returns the downcasted int136 from int256, reverting on
     * overflow (when the input is less than smallest int136 or
     * greater than largest int136).
     *
     * Counterpart to Solidity's `int136` operator.
     *
     * Requirements:
     *
     * - input must fit into 136 bits
     */
    function toInt136(int256 value) internal pure returns (int136 downcasted) {
        downcasted = int136(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(136, value);
        }
    }

    /**
     * @dev Returns the downcasted int128 from int256, reverting on
     * overflow (when the input is less than smallest int128 or
     * greater than largest int128).
     *
     * Counterpart to Solidity's `int128` operator.
     *
     * Requirements:
     *
     * - input must fit into 128 bits
     */
    function toInt128(int256 value) internal pure returns (int128 downcasted) {
        downcasted = int128(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(128, value);
        }
    }

    /**
     * @dev Returns the downcasted int120 from int256, reverting on
     * overflow (when the input is less than smallest int120 or
     * greater than largest int120).
     *
     * Counterpart to Solidity's `int120` operator.
     *
     * Requirements:
     *
     * - input must fit into 120 bits
     */
    function toInt120(int256 value) internal pure returns (int120 downcasted) {
        downcasted = int120(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(120, value);
        }
    }

    /**
     * @dev Returns the downcasted int112 from int256, reverting on
     * overflow (when the input is less than smallest int112 or
     * greater than largest int112).
     *
     * Counterpart to Solidity's `int112` operator.
     *
     * Requirements:
     *
     * - input must fit into 112 bits
     */
    function toInt112(int256 value) internal pure returns (int112 downcasted) {
        downcasted = int112(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(112, value);
        }
    }

    /**
     * @dev Returns the downcasted int104 from int256, reverting on
     * overflow (when the input is less than smallest int104 or
     * greater than largest int104).
     *
     * Counterpart to Solidity's `int104` operator.
     *
     * Requirements:
     *
     * - input must fit into 104 bits
     */
    function toInt104(int256 value) internal pure returns (int104 downcasted) {
        downcasted = int104(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(104, value);
        }
    }

    /**
     * @dev Returns the downcasted int96 from int256, reverting on
     * overflow (when the input is less than smallest int96 or
     * greater than largest int96).
     *
     * Counterpart to Solidity's `int96` operator.
     *
     * Requirements:
     *
     * - input must fit into 96 bits
     */
    function toInt96(int256 value) internal pure returns (int96 downcasted) {
        downcasted = int96(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(96, value);
        }
    }

    /**
     * @dev Returns the downcasted int88 from int256, reverting on
     * overflow (when the input is less than smallest int88 or
     * greater than largest int88).
     *
     * Counterpart to Solidity's `int88` operator.
     *
     * Requirements:
     *
     * - input must fit into 88 bits
     */
    function toInt88(int256 value) internal pure returns (int88 downcasted) {
        downcasted = int88(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(88, value);
        }
    }

    /**
     * @dev Returns the downcasted int80 from int256, reverting on
     * overflow (when the input is less than smallest int80 or
     * greater than largest int80).
     *
     * Counterpart to Solidity's `int80` operator.
     *
     * Requirements:
     *
     * - input must fit into 80 bits
     */
    function toInt80(int256 value) internal pure returns (int80 downcasted) {
        downcasted = int80(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(80, value);
        }
    }

    /**
     * @dev Returns the downcasted int72 from int256, reverting on
     * overflow (when the input is less than smallest int72 or
     * greater than largest int72).
     *
     * Counterpart to Solidity's `int72` operator.
     *
     * Requirements:
     *
     * - input must fit into 72 bits
     */
    function toInt72(int256 value) internal pure returns (int72 downcasted) {
        downcasted = int72(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(72, value);
        }
    }

    /**
     * @dev Returns the downcasted int64 from int256, reverting on
     * overflow (when the input is less than smallest int64 or
     * greater than largest int64).
     *
     * Counterpart to Solidity's `int64` operator.
     *
     * Requirements:
     *
     * - input must fit into 64 bits
     */
    function toInt64(int256 value) internal pure returns (int64 downcasted) {
        downcasted = int64(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(64, value);
        }
    }

    /**
     * @dev Returns the downcasted int56 from int256, reverting on
     * overflow (when the input is less than smallest int56 or
     * greater than largest int56).
     *
     * Counterpart to Solidity's `int56` operator.
     *
     * Requirements:
     *
     * - input must fit into 56 bits
     */
    function toInt56(int256 value) internal pure returns (int56 downcasted) {
        downcasted = int56(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(56, value);
        }
    }

    /**
     * @dev Returns the downcasted int48 from int256, reverting on
     * overflow (when the input is less than smallest int48 or
     * greater than largest int48).
     *
     * Counterpart to Solidity's `int48` operator.
     *
     * Requirements:
     *
     * - input must fit into 48 bits
     */
    function toInt48(int256 value) internal pure returns (int48 downcasted) {
        downcasted = int48(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(48, value);
        }
    }

    /**
     * @dev Returns the downcasted int40 from int256, reverting on
     * overflow (when the input is less than smallest int40 or
     * greater than largest int40).
     *
     * Counterpart to Solidity's `int40` operator.
     *
     * Requirements:
     *
     * - input must fit into 40 bits
     */
    function toInt40(int256 value) internal pure returns (int40 downcasted) {
        downcasted = int40(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(40, value);
        }
    }

    /**
     * @dev Returns the downcasted int32 from int256, reverting on
     * overflow (when the input is less than smallest int32 or
     * greater than largest int32).
     *
     * Counterpart to Solidity's `int32` operator.
     *
     * Requirements:
     *
     * - input must fit into 32 bits
     */
    function toInt32(int256 value) internal pure returns (int32 downcasted) {
        downcasted = int32(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(32, value);
        }
    }

    /**
     * @dev Returns the downcasted int24 from int256, reverting on
     * overflow (when the input is less than smallest int24 or
     * greater than largest int24).
     *
     * Counterpart to Solidity's `int24` operator.
     *
     * Requirements:
     *
     * - input must fit into 24 bits
     */
    function toInt24(int256 value) internal pure returns (int24 downcasted) {
        downcasted = int24(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(24, value);
        }
    }

    /**
     * @dev Returns the downcasted int16 from int256, reverting on
     * overflow (when the input is less than smallest int16 or
     * greater than largest int16).
     *
     * Counterpart to Solidity's `int16` operator.
     *
     * Requirements:
     *
     * - input must fit into 16 bits
     */
    function toInt16(int256 value) internal pure returns (int16 downcasted) {
        downcasted = int16(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(16, value);
        }
    }

    /**
     * @dev Returns the downcasted int8 from int256, reverting on
     * overflow (when the input is less than smallest int8 or
     * greater than largest int8).
     *
     * Counterpart to Solidity's `int8` operator.
     *
     * Requirements:
     *
     * - input must fit into 8 bits
     */
    function toInt8(int256 value) internal pure returns (int8 downcasted) {
        downcasted = int8(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(8, value);
        }
    }

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

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

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

pragma solidity ^0.8.20;

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

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

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

/// @notice Emitted when the protocol fee receiver is updated.
/// @param oldReceiver The old protocol fee receiver address.
/// @param newReceiver The new protocol fee receiver address.
event ProtocolFeeReceiverUpdated(address oldReceiver, address newReceiver);

/// @notice Emitted when the default protocol fee rate is updated.
/// @param oldRate The old default protocol fee rate.
/// @param newRate The new default protocol fee rate.
event DefaultRateUpdated(uint256 oldRate, uint256 newRate);

/// @notice Emitted when a custom fee rate is updated for a specific vault.
/// @param vault The address of the vault.
/// @param rate The new custom fee rate for the vault.
/// @param isActivated A boolean indicating whether the custom rate is activated.
event CustomRateUpdated(address vault, uint16 rate, bool isActivated);

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

import {CustomRateUpdated, DefaultRateUpdated, ProtocolFeeReceiverUpdated} from "./Events.sol";
import {Ownable2StepUpgradeable} from "@openzeppelin/contracts-upgradeable/access/Ownable2StepUpgradeable.sol";

/// @title FeeRegistry
/// @notice The FeeRegistry contract manages protocol fee rates for various vaults.
/// It allows the contract owner (the protocol) to set a default protocol fee rate, define custom fee rates
/// for specific vaults, and manage the address that receives these protocol fees.
/// Protocol fees represents a fraction (which is the rate) of the fees taken by the asset manager of the vault
contract FeeRegistry is Ownable2StepUpgradeable {
    struct CustomRate {
        bool isActivated;
        uint16 rate;
    }

    /// @custom:storage-location erc7201:hopper.storage.FeeRegistry
    struct FeeRegistryStorage {
        uint16 defaultRate;
        address protocolFeeReceiver;
        mapping(address => CustomRate) customRate;
    }

    // keccak256(abi.encode(uint256(keccak256("hopper.storage.FeeRegistry")) - 1)) & ~bytes32(uint256(0xff));
    // solhint-disable-next-line const-name-snakecase
    bytes32 private constant feeRegistryStorage = 0xfae567c932a2d69f96a50330b7967af6689561bf72e1f4ad815fc97800b3f300;

    /// @custom:oz-upgrades-unsafe-allow constructor
    // solhint-disable-next-line ignoreConstructors
    constructor(
        bool disable
    ) {
        if (disable) _disableInitializers();
    }

    /// @notice Initializes the owner and protocol fee receiver.
    /// @param initialOwner The contract protocol address.
    /// @param _protocolFeeReceiver The protocol fee receiver.
    function initialize(address initialOwner, address _protocolFeeReceiver) public initializer {
        __Ownable_init(initialOwner);
        FeeRegistryStorage storage $ = _getFeeRegistryStorage();
        $.protocolFeeReceiver = _protocolFeeReceiver;
    }

    function _getFeeRegistryStorage() internal pure returns (FeeRegistryStorage storage $) {
        // solhint-disable-next-line no-inline-assembly
        assembly {
            $.slot := feeRegistryStorage
        }
    }

    /// @notice Updates the address of the protocol fee receiver.
    /// @param _protocolFeeReceiver The new protocol fee receiver address.
    function updateProtocolFeeReceiver(
        address _protocolFeeReceiver
    ) external onlyOwner {
        emit ProtocolFeeReceiverUpdated(_getFeeRegistryStorage().protocolFeeReceiver, _protocolFeeReceiver);
        _getFeeRegistryStorage().protocolFeeReceiver = _protocolFeeReceiver;
    }

    /// @notice Sets the default protocol fee rate.
    /// @param rate The new default protocol fee rate.
    function updateDefaultRate(
        uint16 rate
    ) external onlyOwner {
        FeeRegistryStorage storage $ = _getFeeRegistryStorage();
        emit DefaultRateUpdated($.defaultRate, rate);
        $.defaultRate = rate;
    }

    /// @notice Sets a custom fee rate for a specific vault.
    /// @param vault The address of the vault.
    /// @param rate The custom fee rate for the vault.
    /// @param isActivated A boolean indicating whether the custom rate is activated.
    function updateCustomRate(address vault, uint16 rate, bool isActivated) external onlyOwner {
        _getFeeRegistryStorage().customRate[vault] = CustomRate({isActivated: isActivated, rate: rate});
        emit CustomRateUpdated(vault, rate, isActivated);
    }

    /// @notice Checks if a custom fee rate is activated for a specific vault.
    /// @param vault The address of the vault.
    /// @return True if the vault has a custom fee rate, false otherwise.
    function isCustomRate(
        address vault
    ) external view returns (bool) {
        return _getFeeRegistryStorage().customRate[vault].isActivated;
    }

    /// @notice Returns the address of the protocol fee receiver.
    /// @return The protocol fee receiver address.
    function protocolFeeReceiver() external view returns (address) {
        return _getFeeRegistryStorage().protocolFeeReceiver;
    }

    /// @notice Returns the protocol fee rate for a specific vault,
    /// representing the percentage of the fees taken by the asset manager.
    /// @param vault The address of the vault.
    /// @return rate The protocol fee rate for the vault.
    function protocolRate(
        address vault
    ) external view returns (uint256 rate) {
        return _protocolRate(vault);
    }

    /// @return rate The protocol fee rate for the caller,
    /// representing the percentage of the fees taken by the asset manager.
    function protocolRate() external view returns (uint256 rate) {
        return _protocolRate(msg.sender);
    }

    /// @notice Returns the protocol fee rate for a specific vault.
    /// @param vault The address of the vault.
    /// @return rate The protocol fee rate for the vault, considering custom rates.
    function _protocolRate(
        address vault
    ) internal view returns (uint256 rate) {
        FeeRegistryStorage storage $ = _getFeeRegistryStorage();
        if ($.customRate[vault].isActivated) {
            return $.customRate[vault].rate;
        }
        return $.defaultRate;
    }
}

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

import {Silo} from "./Silo.sol";
import {IERC7540Deposit} from "./interfaces/IERC7540Deposit.sol";
import {IERC7540Redeem} from "./interfaces/IERC7540Redeem.sol";
import {IWETH9} from "./interfaces/IWETH9.sol";
import {
    CantDepositNativeToken,
    ERC7540InvalidOperator,
    ERC7540PreviewDepositDisabled,
    ERC7540PreviewMintDisabled,
    ERC7540PreviewRedeemDisabled,
    ERC7540PreviewWithdrawDisabled,
    NewTotalAssetsMissing,
    OnlyOneRequestAllowed,
    RequestIdNotClaimable,
    RequestNotCancelable,
    WrongNewTotalAssets
} from "./primitives/Errors.sol";
import {
    DepositRequestCanceled,
    NewTotalAssetsUpdated,
    SettleRedeem,
    SettleDeposit,
    TotalAssetsLifespanUpdated,
    TotalAssetsUpdated
} from "./primitives/Events.sol";
import {EpochData, SettleData} from "./primitives/Struct.sol";
import {
    ERC20Upgradeable,
    IERC20,
    IERC20Metadata
} from "@openzeppelin/contracts-upgradeable/token/ERC20/ERC20Upgradeable.sol";
import {ERC20PausableUpgradeable} from
    "@openzeppelin/contracts-upgradeable/token/ERC20/extensions/ERC20PausableUpgradeable.sol";
import {ERC4626Upgradeable} from "@openzeppelin/contracts-upgradeable/token/ERC20/extensions/ERC4626Upgradeable.sol";
import {IERC165} from "@openzeppelin/contracts/interfaces/IERC165.sol";
import {IERC4626} from "@openzeppelin/contracts/interfaces/IERC4626.sol";
import {IERC20, SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import {Math} from "@openzeppelin/contracts/utils/math/Math.sol";

using SafeERC20 for IERC20;
using Math for uint256;

/// @title ERC7540Upgradeable
/// @dev An implementation of the ERC7540 standard. It defines the core data structures and functions necessary
/// to do requests and process them.
abstract contract ERC7540 is IERC7540Redeem, IERC7540Deposit, ERC20PausableUpgradeable, ERC4626Upgradeable {
    /// @custom:storage-location erc7201:hopper.storage.ERC7540
    /// @param totalAssets The total assets.
    /// @param depositEpochId The current deposit epoch ID.
    /// @param depositSettleId The current deposit settle ID.
    /// @param lastDepositEpochIdSettled The last deposit epoch ID settled.
    /// @param redeemEpochId The current redeem epoch ID.
    /// @param redeemSettleId The current redeem settle ID.
    /// @param lastRedeemEpochIdSettled The last redeem epoch ID settled.
    /// @param epochs A mapping of epochs data.
    /// @param settles A mapping of settle data.
    /// @param lastDepositRequestId A mapping of the last deposit request ID for each user.
    /// @param lastRedeemRequestId A mapping of the last redeem request ID for each user.
    /// @param isOperator A mapping of operators for each user.
    /// @param pendingSilo The pending silo.
    /// @param wrappedNativeToken The wrapped native token. WETH9 for ethereum.
    struct ERC7540Storage {
        uint256 totalAssets;
        uint256 newTotalAssets;
        uint40 depositEpochId;
        uint40 depositSettleId;
        uint40 lastDepositEpochIdSettled;
        uint40 redeemEpochId;
        uint40 redeemSettleId;
        uint40 lastRedeemEpochIdSettled;
        mapping(uint40 epochId => EpochData) epochs;
        mapping(uint40 settleId => SettleData) settles;
        mapping(address user => uint40 epochId) lastDepositRequestId;
        mapping(address user => uint40 epochId) lastRedeemRequestId;
        mapping(address controller => mapping(address operator => bool)) isOperator;
        Silo pendingSilo;
        IWETH9 wrappedNativeToken;
        uint8 decimals;
        uint8 decimalsOffset;
        // New variables introduce with v0.5.0
        uint128 totalAssetsExpiration;
        uint128 totalAssetsLifespan;
    }

    // keccak256(abi.encode(uint256(keccak256("hopper.storage.ERC7540")) - 1)) & ~bytes32(uint256(0xff));
    /// @custom:slot erc7201:hopper.storage.ERC7540
    // solhint-disable-next-line const-name-snakecase
    bytes32 private constant erc7540Storage = 0x5c74d456014b1c0eb4368d944667a568313858a3029a650ff0cb7b56f8b57a00;

    /// @notice Returns the ERC7540 storage struct.
    /// @return _erc7540Storage The ERC7540 storage struct.
    function _getERC7540Storage() internal pure returns (ERC7540Storage storage _erc7540Storage) {
        // solhint-disable-next-line no-inline-assembly
        assembly {
            _erc7540Storage.slot := erc7540Storage
        }
    }

    /// @notice Initializes the ERC7540 contract.
    /// @param underlying The underlying token.
    /// @param wrappedNativeToken The wrapped native token.
    // solhint-disable-next-line func-name-mixedcase
    function __ERC7540_init(IERC20 underlying, address wrappedNativeToken) internal onlyInitializing {
        ERC7540Storage storage $ = _getERC7540Storage();

        $.depositEpochId = 1;
        $.redeemEpochId = 2;

        $.depositSettleId = 1;
        $.redeemSettleId = 2;

        $.pendingSilo = new Silo(underlying, wrappedNativeToken);
        $.wrappedNativeToken = IWETH9(wrappedNativeToken);
        $.newTotalAssets = type(uint256).max;

        uint8 underlyingDecimals = ERC20Upgradeable(asset()).decimals();
        if (underlyingDecimals >= 18) {
            $.decimals = underlyingDecimals;
        } else {
            $.decimals = 18;
            unchecked {
                $.decimalsOffset = 18 - underlyingDecimals;
            }
        }
    }

    ///////////////
    // MODIFIERS //
    ///////////////

    /// @notice Make sure the caller is an operator or the controller.
    /// @param controller The controller.
    modifier onlyOperator(
        address controller
    ) {
        if (controller != msg.sender && !isOperator(controller, msg.sender)) {
            revert ERC7540InvalidOperator();
        }
        _;
    }

    /////////////////////
    // ## Overrides ## //
    /////////////////////

    /// @notice Returns the total assets.
    /// @return The total assets.
    function totalAssets() public view override(IERC4626, ERC4626Upgradeable) returns (uint256) {
        ERC7540Storage storage $ = _getERC7540Storage();
        return $.totalAssets;
    }

    function decimals()
        public
        view
        virtual
        override(ERC4626Upgradeable, ERC20Upgradeable, IERC20Metadata)
        returns (uint8)
    {
        return _getERC7540Storage().decimals;
    }

    function _decimalsOffset() internal view virtual override returns (uint8) {
        return _getERC7540Storage().decimalsOffset;
    }

    function _update(
        address from,
        address to,
        uint256 value
    ) internal virtual override(ERC20PausableUpgradeable, ERC20Upgradeable) {
        return ERC20PausableUpgradeable._update(from, to, value);
    }

    ///////////////////
    // ## EIP7540 ## //
    ///////////////////

    function isOperator(address controller, address operator) public view returns (bool) {
        return _getERC7540Storage().isOperator[controller][operator];
    }

    /// @dev should not be usable when contract is paused
    function setOperator(address operator, bool approved) external whenNotPaused returns (bool success) {
        _getERC7540Storage().isOperator[msg.sender][operator] = approved;
        emit OperatorSet(msg.sender, operator, approved);
        return true;
    }

    function previewDeposit(
        uint256
    ) public pure override(ERC4626Upgradeable, IERC4626) returns (uint256) {
        revert ERC7540PreviewDepositDisabled();
    }

    function previewMint(
        uint256
    ) public pure override(ERC4626Upgradeable, IERC4626) returns (uint256) {
        revert ERC7540PreviewMintDisabled();
    }

    function previewRedeem(
        uint256
    ) public pure override(ERC4626Upgradeable, IERC4626) returns (uint256) {
        revert ERC7540PreviewRedeemDisabled();
    }

    function previewWithdraw(
        uint256
    ) public pure override(ERC4626Upgradeable, IERC4626) returns (uint256) {
        revert ERC7540PreviewWithdrawDisabled();
    }

    ////////////////////////////////
    // ## EIP7540 Deposit Flow ## //
    ////////////////////////////////

    /// @dev Unusable when paused. Modifier not needed as it's overridden.
    /// @notice Request deposit of assets into the vault.
    /// @param assets The amount of assets to deposit.
    /// @param controller The controller is the address that will manage the request.
    /// @param owner The owner of the assets.
    function _requestDeposit(uint256 assets, address controller, address owner) internal returns (uint256) {
        uint256 claimable = claimableDepositRequest(0, controller);
        if (claimable > 0) _deposit(claimable, controller, controller);

        ERC7540Storage storage $ = _getERC7540Storage();

        uint40 _depositId = $.depositEpochId;
        if ($.lastDepositRequestId[controller] != _depositId) {
            if (pendingDepositRequest(0, controller) > 0) {
                revert OnlyOneRequestAllowed();
            }
            $.lastDepositRequestId[controller] = _depositId;
        }

        if (msg.value != 0) {
            // if user sends eth and the underlying is wETH we will wrap it for him
            if (asset() == address($.wrappedNativeToken)) {
                $.pendingSilo.depositEth{value: msg.value}();
                assets = msg.value;
            } else {
                revert CantDepositNativeToken();
            }
        } else {
            IERC20(asset()).safeTransferFrom(owner, address($.pendingSilo), assets);
        }
        $.epochs[_depositId].depositRequest[controller] += assets;

        emit DepositRequest(controller, owner, _depositId, msg.sender, assets);
        return _depositId;
    }

    /// @dev Unusable when paused. Protected by ERC20PausableUpgradeable's _transfer function.
    /// @notice Claim the assets from the vault after a request has been settled.
    /// @param assets The amount of assets requested to deposit.
    /// @param receiver The receiver of the shares.
    /// @return shares The corresponding shares.
    function deposit(
        uint256 assets,
        address receiver
    ) public virtual override(ERC4626Upgradeable, IERC4626) returns (uint256) {
        return _deposit(assets, receiver, msg.sender);
    }

    /// @dev Unusable when paused. Protected by ERC20PausableUpgradeable's _transfer function.
    /// @notice Claim the assets from the vault after a request has been settled.
    /// @param assets The assets to deposit.
    /// @param receiver The receiver of the shares.
    /// @param controller The controller, who owns the deposit request.
    /// @return shares The corresponding shares.
    function deposit(
        uint256 assets,
        address receiver,
        address controller
    ) external virtual onlyOperator(controller) returns (uint256) {
        return _deposit(assets, receiver, controller);
    }

    /// @notice Claim the assets from the vault after a request has been settled.
    /// @param assets The assets to deposit.
    /// @param receiver The receiver of the shares.
    /// @param controller The controller, who owns the deposit request.
    /// @return shares The corresponding shares.
    function _deposit(uint256 assets, address receiver, address controller) internal virtual returns (uint256 shares) {
        ERC7540Storage storage $ = _getERC7540Storage();

        uint40 requestId = $.lastDepositRequestId[controller];
        if (requestId > $.lastDepositEpochIdSettled) {
            revert RequestIdNotClaimable();
        }

        $.epochs[requestId].depositRequest[controller] -= assets;
        shares = convertToShares(assets, requestId);

        _transfer(address(this), receiver, shares);

        emit Deposit(controller, receiver, assets, shares);
    }

    /// @dev Unusable when paused. Protected by ERC20PausableUpgradeable's _transfer function.
    function mint(
        uint256 shares,
        address receiver
    ) public virtual override(ERC4626Upgradeable, IERC4626) returns (uint256) {
        return _mint(shares, receiver, msg.sender);
    }

    /// @dev Unusable when paused. Protected by ERC20PausableUpgradeable's _transfer function.
    /// @notice Claim shares from the vault after a request deposit.
    function mint(
        uint256 shares,
        address receiver,
        address controller
    ) external virtual onlyOperator(controller) returns (uint256) {
        return _mint(shares, receiver, controller);
    }

    /// @notice Mint shares from the vault.
    /// @param shares The shares to mint.
    /// @param receiver The receiver of the shares.
    /// @param controller The controller, who owns the mint request.
    /// @return assets The corresponding assets.
    function _mint(uint256 shares, address receiver, address controller) internal virtual returns (uint256 assets) {
        ERC7540Storage storage $ = _getERC7540Storage();

        uint40 requestId = $.lastDepositRequestId[controller];
        if (requestId > $.lastDepositEpochIdSettled) {
            revert RequestIdNotClaimable();
        }

        assets = _convertToAssets(shares, requestId, Math.Rounding.Ceil);

        $.epochs[requestId].depositRequest[controller] -= assets;
        _transfer(address(this), receiver, shares);

        emit Deposit(controller, receiver, assets, shares);
    }

    /// @dev Unusable when paused. Protected by whenNotPaused.
    /// @notice Cancel a deposit request.
    /// @dev It can only be called in the same epoch.
    function cancelRequestDeposit() external whenNotPaused {
        ERC7540Storage storage $ = _getERC7540Storage();

        uint40 requestId = $.lastDepositRequestId[msg.sender];
        if (requestId != $.depositEpochId) {
            revert RequestNotCancelable(requestId);
        }

        uint256 requestedAmount = $.epochs[requestId].depositRequest[msg.sender];
        $.epochs[requestId].depositRequest[msg.sender] = 0;
        IERC20(asset()).safeTransferFrom(address($.pendingSilo), msg.sender, requestedAmount);

        emit DepositRequestCanceled(requestId, msg.sender);
    }

    ///////////////////////////////
    // ## EIP7540 REDEEM FLOW ## //
    ///////////////////////////////

    /// @dev Unusable when paused. Protected by ERC20PausableUpgradeable's _update function.
    /// @notice Request redemption of shares from the vault.
    /// @param shares The amount of shares to redeem.
    /// @param controller The controller is the address that will manage the request.
    /// @param owner The owner of the shares.
    /// @return The request ID. It is the current redeem epoch ID.
    function _requestRedeem(uint256 shares, address controller, address owner) internal returns (uint256) {
        if (msg.sender != owner && !isOperator(owner, msg.sender)) {
            _spendAllowance(owner, msg.sender, shares);
        }
        ERC7540Storage storage $ = _getERC7540Storage();
        uint256 claimable = claimableRedeemRequest(0, controller);
        if (claimable > 0) _redeem(claimable, controller, controller);

        uint40 _redeemId = $.redeemEpochId;
        if ($.lastRedeemRequestId[controller] != _redeemId) {
            if (pendingRedeemRequest(0, controller) > 0) {
                revert OnlyOneRequestAllowed();
            }
            $.lastRedeemRequestId[controller] = _redeemId;
        }
        $.epochs[_redeemId].redeemRequest[controller] += shares;

        _update(owner, address($.pendingSilo), shares);

        emit RedeemRequest(controller, owner, _redeemId, msg.sender, shares);
        return _redeemId;
    }

    /// @notice Redeem shares from the vault.
    /// @param shares The shares to redeem.
    /// @param receiver The receiver of the assets.
    /// @param controller The controller, who owns the redeem request.
    /// @return assets The corresponding assets.
    function _redeem(uint256 shares, address receiver, address controller) internal returns (uint256 assets) {
        ERC7540Storage storage $ = _getERC7540Storage();

        uint40 requestId = $.lastRedeemRequestId[controller];
        if (requestId > $.lastRedeemEpochIdSettled) {
            revert RequestIdNotClaimable();
        }

        $.epochs[requestId].redeemRequest[controller] -= shares;
        assets = _convertToAssets(shares, requestId, Math.Rounding.Floor);
        IERC20(asset()).safeTransfer(receiver, assets);

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

    /// @notice Withdraw assets from the vault.
    /// @param assets The assets to withdraw.
    /// @param receiver The receiver of the assets.
    /// @param controller The controller, who owns the request.
    /// @return shares The corresponding shares.
    function _withdraw(uint256 assets, address receiver, address controller) internal returns (uint256 shares) {
        ERC7540Storage storage $ = _getERC7540Storage();

        uint40 requestId = $.lastRedeemRequestId[controller];
        if (requestId > $.lastRedeemEpochIdSettled) {
            revert RequestIdNotClaimable();
        }

        shares = _convertToShares(assets, requestId, Math.Rounding.Ceil);
        $.epochs[requestId].redeemRequest[controller] -= shares;
        IERC20(asset()).safeTransfer(receiver, assets);

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

    ////////////////////////////////
    // ## SETTLEMENT FUNCTIONS ## //
    ////////////////////////////////

    /// @dev This function will deposit the pending assets of the pendingSilo.
    /// and save the deposit parameters in the settleData.
    /// @param assetsCustodian The address that will hold the assets.
    function _settleDeposit(
        address assetsCustodian
    ) internal {
        ERC7540Storage storage $erc7540 = _getERC7540Storage();

        uint40 depositSettleId = $erc7540.depositSettleId;

        uint256 _pendingAssets = $erc7540.settles[depositSettleId].pendingAssets;
        if (_pendingAssets == 0) return;

        uint256 shares = _convertToShares(_pendingAssets, Math.Rounding.Floor);

        // cache
        uint256 _totalAssets = totalAssets();
        uint256 _totalSupply = totalSupply();
        uint40 lastDepositEpochIdSettled = $erc7540.depositEpochId - 2;

        SettleData storage settleData = $erc7540.settles[depositSettleId];

        settleData.totalAssets = _totalAssets;
        settleData.totalSupply = _totalSupply;

        _mint(address(this), shares);

        _totalAssets += _pendingAssets;
        _totalSupply += shares;

        $erc7540.totalAssets = _totalAssets;
        $erc7540.depositSettleId = depositSettleId + 2;
        $erc7540.lastDepositEpochIdSettled = lastDepositEpochIdSettled;

        IERC20(asset()).safeTransferFrom(address($erc7540.pendingSilo), assetsCustodian, _pendingAssets);

        emit SettleDeposit(
            lastDepositEpochIdSettled, depositSettleId, _totalAssets, _totalSupply, _pendingAssets, shares
        );
    }

    /// @dev This function will redeem the pending shares of the pendingSilo.
    /// and save the redeem parameters in the settleData.
    /// @param assetsCustodian The address that holds the assets.
    function _settleRedeem(
        address assetsCustodian
    ) internal {
        ERC7540Storage storage $erc7540 = _getERC7540Storage();

        uint40 redeemSettleId = $erc7540.redeemSettleId;

        address _asset = asset();

        uint256 pendingShares = $erc7540.settles[redeemSettleId].pendingShares;
        uint256 assetsToWithdraw = _convertToAssets(pendingShares, Math.Rounding.Floor);

        uint256 assetsInTheSafe = IERC20(_asset).balanceOf(assetsCustodian);
        if (assetsToWithdraw == 0 || assetsToWithdraw > assetsInTheSafe) return;

        // cache
        uint256 _totalAssets = totalAssets();
        uint256 _totalSupply = totalSupply();
        uint40 lastRedeemEpochIdSettled = $erc7540.redeemEpochId - 2;

        SettleData storage settleData = $erc7540.settles[redeemSettleId];

        settleData.totalAssets = _totalAssets;
        settleData.totalSupply = _totalSupply;

        _burn(address($erc7540.pendingSilo), pendingShares);

        _totalAssets -= assetsToWithdraw;
        _totalSupply -= pendingShares;

        $erc7540.totalAssets = _totalAssets;

        $erc7540.redeemSettleId = redeemSettleId + 2;
        $erc7540.lastRedeemEpochIdSettled = lastRedeemEpochIdSettled;

        IERC20(_asset).safeTransferFrom(assetsCustodian, address(this), assetsToWithdraw);

        emit SettleRedeem(
            lastRedeemEpochIdSettled, redeemSettleId, _totalAssets, _totalSupply, assetsToWithdraw, pendingShares
        );
    }

    ////////////////////////////////////////
    // ## TOTALASSETS UPDATE FUNCTIONS ## //
    ////////////////////////////////////////

    /// @notice Update newTotalAssets variable in order to update totalAssets.
    /// @param _newTotalAssets The new total assets of the vault.
    function _updateNewTotalAssets(
        uint256 _newTotalAssets
    ) internal whenNotPaused {
        ERC7540Storage storage $ = _getERC7540Storage();

        $.epochs[$.depositEpochId].settleId = $.depositSettleId;
        $.epochs[$.redeemEpochId].settleId = $.redeemSettleId;

        address _pendingSilo = address($.pendingSilo);
        uint256 pendingAssets = IERC20(asset()).balanceOf(_pendingSilo);
        uint256 pendingShares = balanceOf(_pendingSilo);

        if (pendingAssets != 0) {
            $.depositEpochId += 2;
            $.settles[$.depositSettleId].pendingAssets = pendingAssets;
        }
        if (pendingShares != 0) {
            $.redeemEpochId += 2;
            $.settles[$.redeemSettleId].pendingShares = pendingShares;
        }

        $.newTotalAssets = _newTotalAssets;

        emit NewTotalAssetsUpdated(_newTotalAssets);
    }

    /// @dev Updates the totalAssets variable with the newTotalAssets variable.
    function _updateTotalAssets(
        uint256 _newTotalAssets
    ) internal whenNotPaused {
        ERC7540Storage storage $ = _getERC7540Storage();

        uint256 newTotalAssets = $.newTotalAssets;

        if (
            newTotalAssets == type(uint256).max // it means newTotalAssets has not been updated
        ) revert NewTotalAssetsMissing();

        if (_newTotalAssets != newTotalAssets) {
            revert WrongNewTotalAssets();
        }

        $.totalAssets = newTotalAssets;
        $.newTotalAssets = type(uint256).max; // by setting it to max, we ensure that it is not called again

        $.totalAssetsExpiration = uint128(block.timestamp) + $.totalAssetsLifespan;
        emit TotalAssetsUpdated(newTotalAssets);
    }

    function _updateTotalAssetsLifespan(
        uint128 lifespan
    ) internal {
        ERC7540Storage storage $ = _getERC7540Storage();
        uint128 oldLifespan = $.totalAssetsLifespan;
        $.totalAssetsLifespan = lifespan;
        emit TotalAssetsLifespanUpdated(oldLifespan, lifespan);
    }

    //////////////////////////
    // ## VIEW FUNCTIONS ## //
    //////////////////////////

    /// @notice Converts assets to shares for a specific epoch.
    /// @param assets The assets to convert.
    /// @param requestId The request ID, which is equivalent to the epoch ID.
    /// @return The corresponding shares.
    function convertToShares(uint256 assets, uint256 requestId) public view returns (uint256) {
        return _convertToShares(assets, uint40(requestId), Math.Rounding.Floor);
    }

    /// @dev Converts assets to shares for a specific epoch.
    /// @param assets The assets to convert.
    /// @param requestId The request ID.
    /// @param rounding The rounding method.
    /// @return The corresponding shares.
    function _convertToShares(
        uint256 assets,
        uint40 requestId,
        Math.Rounding rounding
    ) internal view returns (uint256) {
        ERC7540Storage storage $ = _getERC7540Storage();

        // cache
        uint40 settleId = $.epochs[requestId].settleId;

        uint256 _totalAssets = $.settles[settleId].totalAssets + 1;
        uint256 _totalSupply = $.settles[settleId].totalSupply + 10 ** _decimalsOffset();

        return assets.mulDiv(_totalSupply, _totalAssets, rounding);
    }

    /// @dev Converts shares to assets for a specific epoch.
    /// @param shares The shares to convert.
    /// @param requestId The request ID.
    function convertToAssets(uint256 shares, uint256 requestId) public view returns (uint256) {
        return _convertToAssets(shares, uint40(requestId), Math.Rounding.Floor);
    }

    /// @notice Convert shares to assets for a specific epoch/request.
    /// @param shares The shares to convert.
    /// @param requestId The request ID at which the conversion should be done.
    /// @param rounding The rounding method.
    /// @return The corresponding assets.
    function _convertToAssets(
        uint256 shares,
        uint40 requestId,
        Math.Rounding rounding
    ) internal view returns (uint256) {
        ERC7540Storage storage $ = _getERC7540Storage();

        // cache
        uint40 settleId = $.epochs[requestId].settleId;

        uint256 _totalAssets = $.settles[settleId].totalAssets + 1;
        uint256 _totalSupply = $.settles[settleId].totalSupply + 10 ** _decimalsOffset();

        return shares.mulDiv(_totalAssets, _totalSupply, rounding);
    }

    /// @notice Returns the pending redeem request for a controller.
    /// @param requestId The request ID.
    /// @param controller The controller.
    /// @return shares The shares that are waiting to be settled.
    function pendingRedeemRequest(uint256 requestId, address controller) public view returns (uint256 shares) {
        ERC7540Storage storage $ = _getERC7540Storage();

        if (requestId == 0) {
            requestId = $.lastRedeemRequestId[controller];
        }
        if (requestId > $.lastRedeemEpochIdSettled) {
            return $.epochs[uint40(requestId)].redeemRequest[controller];
        }
    }

    /// @notice Returns the claimable redeem request for a controller for a specific request ID.
    /// @param requestId The request ID.
    /// @param controller The controller.
    /// @return shares The shares that can be redeemed.
    function claimableRedeemRequest(uint256 requestId, address controller) public view returns (uint256 shares) {
        ERC7540Storage storage $ = _getERC7540Storage();

        if (requestId == 0) requestId = $.lastRedeemRequestId[controller];
        if (requestId <= $.lastRedeemEpochIdSettled) {
            return $.epochs[uint40(requestId)].redeemRequest[controller];
        }
    }

    /// @notice Returns the amount of assets that are pending to be deposited for a controller. For a specific request
    /// ID.
    /// @param requestId The request ID.
    /// @param controller The controller.
    /// @return assets The assets that are waiting to be settled.
    function pendingDepositRequest(uint256 requestId, address controller) public view returns (uint256 assets) {
        ERC7540Storage storage $ = _getERC7540Storage();

        if (requestId == 0) requestId = $.lastDepositRequestId[controller];
        if (requestId > $.lastDepositEpochIdSettled) {
            return $.epochs[uint40(requestId)].depositRequest[controller];
        }
    }

    /// @notice Returns the claimable deposit request for a controller for a specific request ID.
    /// @param requestId The request ID.
    /// @param controller The controller.
    /// @return assets The assets that can be claimed.
    function claimableDepositRequest(uint256 requestId, address controller) public view returns (uint256 assets) {
        ERC7540Storage storage $ = _getERC7540Storage();

        if (requestId == 0) requestId = $.lastDepositRequestId[controller];
        if (requestId <= $.lastDepositEpochIdSettled) {
            return $.epochs[uint40(requestId)].depositRequest[controller];
        }
    }

    ///////////////////
    // ## EIP7575 ## //
    ///////////////////

    function share() external view returns (address) {
        return (address(this));
    }

    ///////////////////
    // ## EIP165 ## //
    //////////////////

    function supportsInterface(
        bytes4 interfaceId
    ) public view virtual returns (bool) {
        return interfaceId == 0x2f0a18c5 // IERC7575
            || interfaceId == 0xf815c03d // IERC7575 shares
            || interfaceId == 0xce3bbe50 // IERC7540Deposit
            || interfaceId == 0x620ee8e4 // IERC7540Redeem
            || interfaceId == 0xe3bc4e65 // IERC7540
            || interfaceId == type(IERC165).interfaceId;
    }

    //////////////////////////////////
    // ## FUNCTIONS TO IMPLEMENT ## //
    //////////////////////////////////

    /// @dev Settles deposit requests by transferring assets from the pendingSilo to the safe
    /// and minting the corresponding shares to vault.
    /// The function is not implemented here and must be implemented.
    function settleDeposit(
        uint256 _newTotalAssets
    ) public virtual;

    /// @dev Settles redeem requests by transferring assets from the safe to the vault
    /// and burning the corresponding shares from the pending silo.
    /// The function is not implemented here and must be implemented.
    function settleRedeem(
        uint256 _newTotalAssets
    ) public virtual;

    function safe() public view virtual returns (address);
}

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

import {ERC7540} from "./ERC7540.sol";
import {AboveMaxRate} from "./primitives/Errors.sol";
import {HighWaterMarkUpdated, RatesUpdated} from "./primitives/Events.sol";
import {Rates} from "./primitives/Struct.sol";
import {Ownable2StepUpgradeable} from "@openzeppelin/contracts-upgradeable/access/Ownable2StepUpgradeable.sol";
import {Math} from "@openzeppelin/contracts/utils/math/Math.sol";
import {FeeRegistry} from "../protocol/FeeRegistry.sol";

uint256 constant ONE_YEAR = 365 days;
uint256 constant BPS_DIVIDER = 10_000; // 100 %

abstract contract FeeManager is Ownable2StepUpgradeable, ERC7540 {
    using Math for uint256;

    uint16 public constant MAX_MANAGEMENT_RATE = 1000; // 10 %
    uint16 public constant MAX_PERFORMANCE_RATE = 5000; // 50 %
    uint16 public constant MAX_PROTOCOL_RATE = 3000; // 30 %

    /// @custom:storage-definition erc7201:hopper.storage.FeeManager
    /// @param newRatesTimestamp the timestamp at which the new rates will be applied
    /// @param lastFeeTime the timestamp of the last fee calculation, it is used to compute management fees
    /// @param highWaterMark the highest price per share ever reached, performance fees are taken when the price per
    /// share is above this value
    /// @param cooldown the time to wait before applying new rates
    /// @param rates the current fee rates
    /// @param oldRates the previous fee rates, they are used during the cooldown period when new rates are set
    /// @param feeRegistry the fee registry contract, it is used to read the protocol rate
    struct FeeManagerStorage {
        FeeRegistry feeRegistry;
        uint256 newRatesTimestamp;
        uint256 lastFeeTime;
        uint256 highWaterMark;
        uint256 cooldown;
        Rates rates;
        Rates oldRates;
    }

    // keccak256(abi.encode(uint256(keccak256("hopper.storage.FeeManager")) - 1)) & ~bytes32(uint256(0xff));
    /// @custom:storage-location erc7201:hopper.storage.FeeManager
    // solhint-disable-next-line const-name-snakecase
    bytes32 private constant feeManagerStorage = 0xa5292f7ccd85acc1b3080c01f5da9af7799f2c26826bd4d79081d6511780bd00;

    /// @notice Get the storage slot for the FeeManagerStorage struct
    /// @return _feeManagerStorage the storage slot
    function _getFeeManagerStorage() internal pure returns (FeeManagerStorage storage _feeManagerStorage) {
        // solhint-disable-next-line no-inline-assembly
        assembly {
            _feeManagerStorage.slot := feeManagerStorage
        }
    }

    /// @notice Initialize the FeeManager contract
    /// @param _registry the address of the fee registry contract
    /// @param _managementRate the management rate, expressed in BPS
    /// @param _performanceRate the performance rate, expressed in BPS
    /// @param _decimals the number of decimals of the shares
    /// @param _cooldown the time to wait before applying new rates
    // solhint-disable-next-line func-name-mixedcase
    function __FeeManager_init(
        address _registry,
        uint16 _managementRate,
        uint16 _performanceRate,
        uint256 _decimals,
        uint256 _cooldown
    ) internal onlyInitializing {
        if (_managementRate > MAX_MANAGEMENT_RATE) {
            revert AboveMaxRate(MAX_MANAGEMENT_RATE);
        }
        if (_performanceRate > MAX_PERFORMANCE_RATE) {
            revert AboveMaxRate(MAX_PERFORMANCE_RATE);
        }

        FeeManagerStorage storage $ = _getFeeManagerStorage();

        $.newRatesTimestamp = block.timestamp;

        $.cooldown = _cooldown;

        $.feeRegistry = FeeRegistry(_registry);
        $.highWaterMark = 10 ** _decimals;

        $.rates.managementRate = _managementRate;
        $.rates.performanceRate = _performanceRate;
    }

    /// @notice Take the fees by minting the manager and protocol shares
    /// @param feeReceiver the address that will receive the manager shares
    /// @param protocolFeeReceiver the address that will receive the protocol shares
    function _takeFees(address feeReceiver, address protocolFeeReceiver) internal {
        FeeManagerStorage storage $ = _getFeeManagerStorage();

        (uint256 managerShares, uint256 protocolShares) = _calculateFees();

        if (managerShares > 0) {
            _mint(feeReceiver, managerShares);
            if (
                protocolShares > 0 // they can't be protocolShares without managerShares
            ) _mint(protocolFeeReceiver, protocolShares);
        }
        uint256 pricePerShare = _convertToAssets(10 ** decimals(), Math.Rounding.Floor);
        _setHighWaterMark(pricePerShare);

        $.lastFeeTime = block.timestamp;
    }

    /// @notice update the fee rates, the new rates will be applied after the cooldown period
    /// @param newRates the new fee rates
    function updateRates(
        Rates memory newRates
    ) external onlyOwner {
        FeeManagerStorage storage $ = _getFeeManagerStorage();
        if (newRates.managementRate > MAX_MANAGEMENT_RATE) {
            revert AboveMaxRate(MAX_MANAGEMENT_RATE);
        }
        if (newRates.performanceRate > MAX_PERFORMANCE_RATE) {
            revert AboveMaxRate(MAX_PERFORMANCE_RATE);
        }

        uint256 newRatesTimestamp = block.timestamp + $.cooldown;
        Rates memory currentRates = $.rates;

        $.newRatesTimestamp = newRatesTimestamp;
        $.oldRates = currentRates;
        $.rates = newRates;
        emit RatesUpdated(currentRates, newRates, newRatesTimestamp);
    }

    /// @dev Since we have a cooldown period and to avoid a double call
    /// to update the feeRates, this function returns a different rate
    /// following the timestamp
    /// @notice the current fee rates
    function feeRates() public view returns (Rates memory) {
        FeeManagerStorage storage $ = _getFeeManagerStorage();

        if ($.newRatesTimestamp <= block.timestamp) return $.rates;
        return $.oldRates;
    }

    /// @dev Update the high water mark only if the new value is greater than the current one
    /// @dev The high water mark is the highest price per share ever reached
    /// @param _newHighWaterMark the new high water mark
    function _setHighWaterMark(
        uint256 _newHighWaterMark
    ) internal {
        FeeManagerStorage storage $ = _getFeeManagerStorage();

        uint256 _highWaterMark = $.highWaterMark;

        if (_newHighWaterMark > _highWaterMark) {
            emit HighWaterMarkUpdated(_highWaterMark, _newHighWaterMark);
            $.highWaterMark = _newHighWaterMark;
        }
    }

    /// @dev Read the protocol rate from the fee registry
    /// @dev if the value is above the MAX_PROTOCOL_RATE, return the MAX_PROTOCOL_RATE
    /// @return protocolRate the protocol rate
    function _protocolRate() internal view returns (uint256 protocolRate) {
        FeeManagerStorage storage $ = _getFeeManagerStorage();

        protocolRate = $.feeRegistry.protocolRate();
        if (protocolRate > MAX_PROTOCOL_RATE) return MAX_PROTOCOL_RATE;
        return protocolRate;
    }

    /// @dev Calculate and return the manager and protocol shares to be minted as fees
    /// @dev total fees are the sum of the management and performance fees
    /// @dev manager shares are the fees that go to the manager, it is the difference between the total fees and the
    /// protocol fees
    /// @dev protocol shares are the fees that go to the protocol
    /// @return managerShares the manager shares to be minted as fees
    /// @return protocolShares the protocol shares to be minted as fees
    function _calculateFees() internal view returns (uint256 managerShares, uint256 protocolShares) {
        FeeManagerStorage storage $ = _getFeeManagerStorage();

        uint256 _decimals = decimals();

        Rates memory _rates = feeRates();

        /// Management fee computation ///

        uint256 timeElapsed = block.timestamp - $.lastFeeTime;
        uint256 _totalAssets = totalAssets();
        uint256 managementFees = _calculateManagementFee(_totalAssets, _rates.managementRate, timeElapsed);

        // by taking management fees the price per share decreases
        uint256 pricePerShare = (10 ** _decimals).mulDiv(
            _totalAssets + 1 - managementFees, totalSupply() + 10 ** _decimalsOffset(), Math.Rounding.Ceil
        );

        /// Performance fee computation ///

        uint256 _totalSupply = totalSupply();
        uint256 performanceFees =
            _calculatePerformanceFee(_rates.performanceRate, _totalSupply, pricePerShare, $.highWaterMark, _decimals);

        /// Protocol fee computation & convertion to shares ///

        uint256 totalFees = managementFees + performanceFees;

        // since we are minting shares without actually increasing the totalAssets, we need to compensate the future
        // dilution of price per share by virtually decreasing totalAssets in our computation
        uint256 totalShares =
            totalFees.mulDiv(_totalSupply + 10 ** _decimalsOffset(), (_totalAssets - totalFees) + 1, Math.Rounding.Ceil);

        protocolShares = totalShares.mulDiv(_protocolRate(), BPS_DIVIDER, Math.Rounding.Ceil);
        managerShares = totalShares - protocolShares;
    }

    /// @dev Calculate the management fee
    /// @param assets the total assets under management
    /// @param annualRate the management rate, expressed in BPS and corresponding to the annual
    /// @param timeElapsed the time elapsed since the last fee calculation in seconds
    /// @return managementFee the management fee express in assets
    function _calculateManagementFee(
        uint256 assets,
        uint256 annualRate,
        uint256 timeElapsed
    ) internal pure returns (uint256 managementFee) {
        uint256 annualFee = assets.mulDiv(annualRate, BPS_DIVIDER, Math.Rounding.Ceil);
        managementFee = annualFee.mulDiv(timeElapsed, ONE_YEAR, Math.Rounding.Ceil);
    }

    /// @dev Calculate the performance fee
    /// @dev The performance is calculated as the difference between the current price per share and the high water mark
    /// @dev The performance fee is calculated as the product of the performance and the performance rate
    /// @param _rate the performance rate, expressed in BPS
    /// @param _totalSupply the total supply of shares
    /// @param _pricePerShare the current price per share
    /// @param _highWaterMark the highest price per share ever reached
    /// @param _decimals the number of decimals of the shares
    /// @return performanceFee the performance fee express in assets
    function _calculatePerformanceFee(
        uint256 _rate,
        uint256 _totalSupply,
        uint256 _pricePerShare,
        uint256 _highWaterMark,
        uint256 _decimals
    ) internal pure returns (uint256 performanceFee) {
        if (_pricePerShare > _highWaterMark) {
            uint256 profitPerShare;
            unchecked {
                profitPerShare = _pricePerShare - _highWaterMark;
            }
            uint256 profit = profitPerShare.mulDiv(_totalSupply, 10 ** _decimals, Math.Rounding.Ceil);
            performanceFee = profit.mulDiv(_rate, BPS_DIVIDER, Math.Rounding.Ceil);
        }
    }
}

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

import {IERC7575} from "./IERC7575.sol";
import {IERC165} from "@openzeppelin/contracts/interfaces/IERC165.sol";

interface IERC7540 is IERC7575, IERC165 {
    event OperatorSet(address indexed controller, address indexed operator, bool approved);

    // EIP7575 https://eips.ethereum.org/EIPS/eip-7575
    function share() external view returns (address);

    function isOperator(address controller, address operator) external returns (bool);

    function setOperator(address operator, bool approved) external returns (bool success);
}

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

import {IERC7540} from "./IERC7540.sol";

interface IERC7540Deposit is IERC7540 {
    /**
     * owner has locked assets in the Vault to Request a deposit with request ID requestId.
     * controller controls this Request.
     * sender is the caller of the requestDeposit
     * which may not be equal to the owner
     *
     */
    event DepositRequest(
        address indexed controller, address indexed owner, uint256 indexed requestId, address sender, uint256 assets
    );

    function requestDeposit(
        uint256 assets,
        address controller,
        address owner
    ) external payable returns (uint256 requestId);

    function deposit(uint256 assets, address receiver, address controller) external returns (uint256 shares);

    function mint(uint256 shares, address receiver, address controller) external returns (uint256 assets);

    function pendingDepositRequest(uint256 requestId, address controller) external view returns (uint256 assets);

    function claimableDepositRequest(uint256 requestId, address controller) external view returns (uint256 assets);
}

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

import {IERC7540} from "./IERC7540.sol";

interface IERC7540Redeem is IERC7540 {
    event RedeemRequest(
        address indexed controller, address indexed owner, uint256 indexed requestId, address sender, uint256 shares
    );

    function requestRedeem(uint256 shares, address operator, address owner) external returns (uint256 requestId);

    function pendingRedeemRequest(uint256 requestId, address controller) external view returns (uint256 shares);

    function claimableRedeemRequest(uint256 requestId, address controller) external view returns (uint256 shares);
}

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

import {IERC4626} from "@openzeppelin/contracts/interfaces/IERC4626.sol";

// EIP7575 https://eips.ethereum.org/EIPS/eip-7575
interface IERC7575 is IERC4626 {
    function share() external view returns (address);
}

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

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

/// @title Interface for WETH9
interface IWETH9 is IERC20 {
    /// @notice Deposit ether to get wrapped ether
    function deposit() external payable;

    /// @notice Withdraw wrapped ether to get ether
    function withdraw(
        uint256
    ) external;
}

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

// ********************* VAULT ********************* //

enum State {
    Open, // The vault is open for deposits and withdrawals.
    Closing, // The vault is in the process of closing; no NEW deposit (settlement) are accepted into the vault
    Closed // The vault is closed; settlement are locked; withdrawals are guaranteed at fixed price per share

}

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

import {State} from "./Enums.sol";

// ********************* VAULT ********************* //

/// @notice Indicates that the vault is not Open. It's either Closing or Close.
/// @param currentState The current state of the vault.
error NotOpen(State currentState);

/// @notice Indicates that the vault is not in the process of closing. It's either Open or Close.
/// @param currentState The current state of the vault.
error NotClosing(State currentState);

/// @notice Indicates that the vault is Closed.
error Closed();

/// @notice No new valuation proposition is allowed
error ValuationUpdateNotAllowed();

// ********************* ERC7540 ********************* //

/// @notice Indicates that preview deposit is disabled.
error ERC7540PreviewDepositDisabled();

/// @notice Indicates that preview mint is disabled.
error ERC7540PreviewMintDisabled();

/// @notice Indicates that preview redeem is disabled.
error ERC7540PreviewRedeemDisabled();

/// @notice Indicates that preview withdraw is disabled.
error ERC7540PreviewWithdrawDisabled();

/// @notice Indicates that only one request is allowed per settlement period.
error OnlyOneRequestAllowed();

/// @notice Indicates that the specified request is not cancelable.
/// @param requestId The ID of the request that cannot be canceled.
error RequestNotCancelable(uint256 requestId);

/// @notice Indicates an invalid operator for ERC7540 operations.
error ERC7540InvalidOperator();

/// @notice Indicates that the specified request ID is not claimable.
error RequestIdNotClaimable();

/// @notice Indicates that depositing a native token is not allowed.
error CantDepositNativeToken();

/// @notice Indicates that a new total assets value was not provided by the valuation manager.
error NewTotalAssetsMissing();

/// @notice Indicates that the new total assets value is not the one expected.
error WrongNewTotalAssets();

/// @notice Indicates that totalAssets value is outdated and that synchronous deposits are not allowed.
error OnlyAsyncDepositAllowed();

/// @notice Indicates that deposit can only happen via the synchronous path.
error OnlySyncDepositAllowed();

// ********************* FEE MANAGER ********************* //

/// @notice Indicates that the provided rate exceeds the maximum allowed rate.
/// @param maxRate The maximum allowable rate.
error AboveMaxRate(uint256 maxRate);

// ********************* ROLES ********************* //

/// @notice Indicates that the caller is not a safe address.
/// @param safe The address of the safe.
error OnlySafe(address safe);

/// @notice Indicates that the caller is not the whitelist manager.
/// @param whitelistManager The address of the whitelist manager.
error OnlyWhitelistManager(address whitelistManager);

/// @notice Indicates that the caller is not the valuation manager.
/// @param valuationManager The address of the valuation manager.
error OnlyValuationManager(address valuationManager);

// ********************* WHITELISTABLE ********************* //

/// @notice Indicates that the caller is not whitelisted.
error NotWhitelisted();

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

import {State} from "./Enums.sol";
import {Rates} from "./Struct.sol";

// ********************* VAULT ********************* //

/// @notice Emitted when a referral is made.
/// @param referral The address of the referral.
/// @param owner The address of the owner making the referral.
/// @param requestId The ID of the associated request.
/// @param assets The amount of assets involved in the referral.
event Referral(address indexed referral, address indexed owner, uint256 indexed requestId, uint256 assets);

/// @notice Emitted when the state of the vault is updated.
/// @param state The new state of the vault. Either Open, Closing or Close.
event StateUpdated(State state);

event SettleDeposit(
    uint40 indexed epochId,
    uint40 indexed settledId,
    uint256 totalAssets,
    uint256 totalSupply,
    uint256 assetsDeposited,
    uint256 sharesMinted
);

event SettleRedeem(
    uint40 indexed epochId,
    uint40 indexed settledId,
    uint256 totalAssets,
    uint256 totalSupply,
    uint256 assetsWithdrawed,
    uint256 sharesBurned
);

// ********************* WHITELISTABLE ********************* //

/// @notice Emitted when the Merkle tree root is updated.
/// @param root The new Merkle tree root.
event RootUpdated(bytes32 indexed root);

/// @notice Emitted when a whitelist entry is updated.
/// @param account The address of the account being updated.
/// @param authorized Indicates whether the account is authorized (true) or not (false).
event WhitelistUpdated(address indexed account, bool authorized);

/// @notice Emitted when the whitelist is disabled.
event WhitelistDisabled();

// ********************* ROLES ********************* //

/// @notice Emitted when the whitelist manager role is updated.
/// @param oldManager The address of the old whitelist manager.
/// @param newManager The address of the new whitelist manager.
event WhitelistManagerUpdated(address oldManager, address newManager);

/// @notice Emitted when the fee receiver role is updated.
/// @param oldReceiver The address of the old fee receiver.
/// @param newReceiver The address of the new fee receiver.
event FeeReceiverUpdated(address oldReceiver, address newReceiver);

/// @notice Emitted when the Valuation manager role is updated.
/// @param oldManager The address of the old Valuation manager.
/// @param newManager The address of the new Valuation manager.
event ValuationManagerUpdated(address oldManager, address newManager);

// ********************* FEE_MANAGER ********************* //

/// @notice Emitted when the rates are updated.
/// @param oldRates The new rates.
/// @param newRate The new rates.
/// @param timestamp The timestamp at which the update will take effect.
event RatesUpdated(Rates oldRates, Rates newRate, uint256 timestamp);

/// @notice Emitted when the highWaterMark is updated.
/// @param oldHighWaterMark The old highWaterMark.
/// @param newHighWaterMark The new highWaterMark.
event HighWaterMarkUpdated(uint256 oldHighWaterMark, uint256 newHighWaterMark);

// ********************* ERC7540 ********************* //
/// @notice Emitted when the totalAssets variable is updated.
/// @param totalAssets The new total assets value.
event TotalAssetsUpdated(uint256 totalAssets);

/// @notice Emitted when the newTotalAssets variable is updated.
/// @param totalAssets The new newTotalAssets value.
event NewTotalAssetsUpdated(uint256 totalAssets);

/// @notice Emitted when a deposit request is canceled.
/// @param requestId The ID of the canceled request.
/// @param controller The address of the controller of the canceled request.
event DepositRequestCanceled(uint256 indexed requestId, address indexed controller);

/// @notice Emitted when the lifespan is updated.
/// @param oldLifespan The old lifespan.
/// @param newLifespan The new lifespan.
event TotalAssetsLifespanUpdated(uint128 oldLifespan, uint128 newLifespan);

/// @notice Same as a 4626 Deposit event
/// @param sender The address who gave its assets
/// @param owner The receiver of the shares
/// @param assets Amount of assets deposit
/// @param shares Amount of shares minted to owner
event DepositSync(address indexed sender, address indexed owner, uint256 assets, uint256 shares);

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

// ********************* ERC7540 ********************* //

/// @dev Holds management and performance rates for the vault.
/// @param managementRate Management fee rate in basis points.
/// @param performanceRate Performance fee rate in basis points.
struct Rates {
    uint16 managementRate;
    uint16 performanceRate;
}

/// @dev Holds data for a specific epoch.
/// @param settleId Unique identifier for the related settlement data.
/// @param depositRequest Records deposit requests by address.
/// @param redeemRequest Records redeem requests by address.
struct EpochData {
    uint40 settleId;
    mapping(address => uint256) depositRequest;
    mapping(address => uint256) redeemRequest;
}

/// @dev Holds settlement data for the vault.
/// @param totalSupply Total number of shares for this settlement.
/// @param totalAssets Total value of assets managed by the vault for this settlement.
struct SettleData {
    uint256 totalSupply;
    uint256 totalAssets;
    uint256 pendingAssets;
    uint256 pendingShares;
}

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

import {FeeRegistry} from "../protocol/FeeRegistry.sol";
import {OnlySafe, OnlyValuationManager, OnlyWhitelistManager} from "./primitives/Errors.sol";
import {FeeReceiverUpdated, ValuationManagerUpdated, WhitelistManagerUpdated} from "./primitives/Events.sol";
import {Ownable2StepUpgradeable} from "@openzeppelin/contracts-upgradeable/access/Ownable2StepUpgradeable.sol";

/// @title RolesUpgradeable
/// @dev This contract is used to define the various roles needed for a vault to operate.
/// @dev It also defines the modifiers used to check functions' caller.
abstract contract Roles is Ownable2StepUpgradeable {
    /// @notice Stores the various roles responsible of managing the vault.
    /// @param whitelistManager The address responsible of managing the whitelist.
    /// @param feeReceiver The address that will receive the fees generated.
    /// @param safe Every lagoon vault is associated with a Safe smart contract. This address will receive the assets of
    /// the vault and can settle deposits and redeems.
    /// @param feeRegistry The address of the FeeRegistry contract.
    /// @param valuationManager. This address is responsible of updating the newTotalAssets value of the vault.
    /// @param owner The address of the owner of the contract. It considered as the admin. It is not visible in the
    /// struct. It can change the others roles and itself. Initiate the fund closing. Disable the whitelist.
    struct RolesStorage {
        address whitelistManager;
        address feeReceiver;
        address safe;
        FeeRegistry feeRegistry;
        address valuationManager;
    }

    /// @dev Initializes the roles of the vault.
    /// @param roles The roles to be initialized.
    // solhint-disable-next-line func-name-mixedcase
    function __Roles_init(
        RolesStorage memory roles
    ) internal onlyInitializing {
        RolesStorage storage $ = _getRolesStorage();

        $.whitelistManager = roles.whitelistManager;
        $.feeReceiver = roles.feeReceiver;
        $.safe = roles.safe;
        $.feeRegistry = FeeRegistry(roles.feeRegistry);
        $.valuationManager = roles.valuationManager;
    }

    // keccak256(abi.encode(uint256(keccak256("hopper.storage.Roles")) - 1)) & ~bytes32(uint256(0xff))
    /// @custom:storage-location erc7201:hopper.storage.Roles
    // solhint-disable-next-line const-name-snakecase
    bytes32 private constant rolesStorage = 0x7c302ed2c673c3d6b4551cf74a01ee649f887e14fd20d13dbca1b6099534d900;

    /// @dev Returns the storage struct of the roles.
    /// @return _rolesStorage The storage struct of the roles.
    function _getRolesStorage() internal pure returns (RolesStorage storage _rolesStorage) {
        // solhint-disable-next-line no-inline-assembly
        assembly {
            _rolesStorage.slot := rolesStorage
        }
    }

    /// @dev Returns the storage struct of the roles.
    /// @return _rolesStorage The storage struct of the roles.
    function getRolesStorage() public pure returns (RolesStorage memory _rolesStorage) {
        _rolesStorage = _getRolesStorage();
    }

    /// @dev Modifier to check if the caller is the safe.
    modifier onlySafe() {
        address _safe = _getRolesStorage().safe;
        if (_safe != msg.sender) revert OnlySafe(_safe);
        _;
    }

    /// @dev Modifier to check if the caller is the whitelist manager.
    modifier onlyWhitelistManager() {
        address _whitelistManager = _getRolesStorage().whitelistManager;
        if (_whitelistManager != msg.sender) {
            revert OnlyWhitelistManager(_whitelistManager);
        }
        _;
    }

    /// @dev Modifier to check if the caller is the valuation manager.
    modifier onlyValuationManager() {
        address _valuationManager = _getRolesStorage().valuationManager;
        if (_valuationManager != msg.sender) {
            revert OnlyValuationManager(_valuationManager);
        }
        _;
    }

    /// @notice Updates the address of the whitelist manager.
    /// @param _whitelistManager The new address of the whitelist manager.
    /// @dev Only the owner can call this function.
    function updateWhitelistManager(
        address _whitelistManager
    ) external onlyOwner {
        emit WhitelistManagerUpdated(_getRolesStorage().whitelistManager, _whitelistManager);
        _getRolesStorage().whitelistManager = _whitelistManager;
    }

    /// @notice Updates the address of the valuation manager.
    /// @param _valuationManager The new address of the valuation manager.
    /// @dev Only the owner can call this function.
    function updateValuationManager(
        address _valuationManager
    ) external onlyOwner {
        emit ValuationManagerUpdated(_getRolesStorage().valuationManager, _valuationManager);
        _getRolesStorage().valuationManager = _valuationManager;
    }

    /// @notice Updates the address of the fee receiver.
    /// @param _feeReceiver The new address of the fee receiver.
    /// @dev Only the owner can call this function.
    function updateFeeReceiver(
        address _feeReceiver
    ) external onlyOwner {
        emit FeeReceiverUpdated(_getRolesStorage().feeReceiver, _feeReceiver);
        _getRolesStorage().feeReceiver = _feeReceiver;
    }
}

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

import {IWETH9} from "./interfaces/IWETH9.sol";
import {IERC20, SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";

using SafeERC20 for IERC20;

/// @title Silo
/// @dev This contract is used to hold the assets/shares of the users that
/// requested a deposit/redeem. It is used to simplify the logic of the vault.
contract Silo {
    IWETH9 public wrappedNativeToken;

    constructor(IERC20 underlying, address _wrappedNativeToken) {
        underlying.forceApprove(msg.sender, type(uint256).max);
        wrappedNativeToken = IWETH9(_wrappedNativeToken);
    }

    function depositEth() external payable {
        IWETH9(wrappedNativeToken).deposit{value: msg.value}();
    }
}

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

import {Roles} from "./Roles.sol";
import {WhitelistDisabled, WhitelistUpdated} from "./primitives/Events.sol";

abstract contract Whitelistable is Roles {
    // keccak256(abi.encode(uint256(keccak256("hopper.storage.Whitelistable")) - 1)) & ~bytes32(uint256(0xff))
    /// @custom:storage-location erc7201:hopper.storage.Whitelistable
    // solhint-disable-next-line const-name-snakecase
    bytes32 private constant whitelistableStorage = 0x083cc98ab296d1a1f01854b5f7a2f47df4425a56ba7b35f7faa3a336067e4800;

    /// @custom:storage-definition erc7201:hopper.storage.Whitelistable
    /// @param isWhitelisted The mapping of whitelisted addresses.
    /// @param isActivated The flag to check if the whitelist is activated.
    struct WhitelistableStorage {
        mapping(address => bool) isWhitelisted;
        bool isActivated;
    }

    /// @dev Returns the storage struct of the whitelist.
    /// @return _whitelistableStorage The storage struct of the whitelist.
    function _getWhitelistableStorage() internal pure returns (WhitelistableStorage storage _whitelistableStorage) {
        // solhint-disable-next-line no-inline-assembly
        assembly {
            _whitelistableStorage.slot := whitelistableStorage
        }
    }

    /// @dev Initializes the whitelist.
    /// @param activate if the whitelist should be activated.
    // solhint-disable-next-line func-name-mixedcase
    function __Whitelistable_init(
        bool activate
    ) internal onlyInitializing {
        if (activate) {
            WhitelistableStorage storage $ = _getWhitelistableStorage();
            $.isActivated = true;
        }
    }

    /// @notice Deactivates the whitelist
    function disableWhitelist() public onlyOwner {
        _getWhitelistableStorage().isActivated = false;
        emit WhitelistDisabled();
    }

    /// @notice Checks if an account is whitelisted
    /// @param account The address of the account to check
    /// @return True if the account is whitelisted, false otherwise
    function isWhitelisted(
        address account
    ) public view returns (bool) {
        WhitelistableStorage storage $ = _getWhitelistableStorage();
        if (_getRolesStorage().feeRegistry.protocolFeeReceiver() == account) {
            return true;
        }
        return $.isActivated ? $.isWhitelisted[account] : true;
    }

    /// @notice Adds multiple accounts to the whitelist
    function addToWhitelist(
        address[] memory accounts
    ) external onlyWhitelistManager {
        WhitelistableStorage storage $ = _getWhitelistableStorage();

        for (uint256 i = 0; i < accounts.length; i++) {
            $.isWhitelisted[accounts[i]] = true;
            emit WhitelistUpdated(accounts[i], true);
        }
    }

    /// @notice Removes multiple accounts from the whitelist
    /// @param accounts The addresses of the accounts to remove
    function revokeFromWhitelist(
        address[] memory accounts
    ) external onlyWhitelistManager {
        WhitelistableStorage storage $ = _getWhitelistableStorage();
        uint256 i = 0;
        for (; i < accounts.length;) {
            $.isWhitelisted[accounts[i]] = false;
            emit WhitelistUpdated(accounts[i], false);
            // solhint-disable-next-line no-inline-assembly
            unchecked {
                ++i;
            }
        }
    }
}

{
  "optimizer": {
    "enabled": true,
    "runs": 1
  },
  "metadata": {
    "bytecodeHash": "none"
  },
  "evmVersion": "paris",
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
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• No Contract Security Audit Submitted- Submit Audit Here

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