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// SPDX-License-Identifier: BUSL-1.1
pragma solidity 0.8.27;

import "../../Errors/Errors.sol";
import { IWithdrawQueue, WithdrawRequest } from "../interfaces/IWithdrawQueue.sol";
import { IWeth } from "../interfaces/IWeth.sol";
import { IRestakeManager } from "../interfaces/IRestakeManager.sol";
import { ICachedRateProvider } from "../interfaces/ICachedRateProvider.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "../interfaces/IDelegateStrategy.sol";

/**
 * @author  Renzo Protocol
 * @title   ezETHConversionStrategy
 * @dev     This contract manages bidirectional conversions between ezETH and WETH.
 * @notice  Strategy for converting between ezETH and WETH through Renzo's deposit and withdrawal processes.
 *          Tracks pending withdrawals and returns their value in WETH terms using a cached rate provider.
 */
contract ezETHConversionStrategy is IDelegateStrategy {
    using SafeERC20 for IERC20;

    /// @dev Renzo Address constant for Native ETH
    address public constant IS_NATIVE = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;

    /// @notice ezETH token
    IERC20 public immutable ezEthToken;

    /// @notice WETH token (underlying asset)
    IERC20 public immutable wethToken;

    /// @notice Renzo withdraw queue for ezETH to ETH conversions
    IWithdrawQueue public immutable withdrawQueue;

    /// @notice Renzo restake manager for ETH to ezETH deposits
    IRestakeManager public immutable restakeManager;

    /// @notice Cached rate provider for ezETH/ETH exchange rate
    ICachedRateProvider public immutable cachedRateProvider;

    /// @notice Cache duration in seconds (60 seconds = 1 minute)
    uint256 public constant RATE_CACHE_DURATION = 60;

    /// @notice Emitted when WETH to ezETH conversion is initiated
    event WethToEzEthConversionStarted(uint256 wethAmount);

    /// @notice Emitted when ezETH to WETH withdrawal is started
    event EzEthToWethWithdrawalStarted(uint256 ezEthAmount);

    /// @notice Emitted when ezETH to WETH withdrawal is completed
    event EzEthToWethWithdrawalCompleted(uint256 withdrawIndex, uint256 wethAmount);

    /**
     * @notice Constructor
     * @param _ezEthToken Address of the ezETH token
     * @param _wethToken Address of the WETH token
     * @param _withdrawQueue Address of Renzo's withdraw queue
     * @param _restakeManager Address of Renzo's restake manager
     * @param _cachedRateProvider Address of the cached rate provider
     */
    constructor(
        address _ezEthToken,
        address _wethToken,
        address _withdrawQueue,
        address _restakeManager,
        address _cachedRateProvider
    ) {
        if (_ezEthToken == address(0)) revert InvalidZeroInput();
        if (_wethToken == address(0)) revert InvalidZeroInput();
        if (_withdrawQueue == address(0)) revert InvalidZeroInput();
        if (_restakeManager == address(0)) revert InvalidZeroInput();
        if (_cachedRateProvider == address(0)) revert InvalidZeroInput();

        ezEthToken = IERC20(_ezEthToken);
        wethToken = IERC20(_wethToken);
        withdrawQueue = IWithdrawQueue(_withdrawQueue);
        restakeManager = IRestakeManager(_restakeManager);
        cachedRateProvider = ICachedRateProvider(_cachedRateProvider);
    }

    /**
     * @notice Convert WETH to ezETH via Renzo deposit
     * @dev Unwraps WETH to ETH and deposits to Renzo restake manager
     * @param wethAmount Amount of WETH to convert to ezETH
     */
    function convertWethToEzEth(uint256 wethAmount) external {
        if (wethAmount == 0) revert InvalidZeroInput();

        // Convert WETH to ETH and then deposit ETH to restakeManager
        IWeth(address(wethToken)).withdraw(wethAmount);
        restakeManager.depositETH{ value: wethAmount }();

        emit WethToEzEthConversionStarted(wethAmount);
    }

    /**
     * @notice Start converting ezETH to WETH via withdraw queue
     * @dev Approves ezETH and initiates withdrawal for native ETH
     * @param ezEthAmount Amount of ezETH to withdraw
     */
    function startConvertEzEthToWeth(uint256 ezEthAmount) external {
        if (ezEthAmount == 0) revert InvalidZeroInput();

        // Start a withdrawal from the withdrawQueue
        // Approve ezETH first then trigger withdraw
        ezEthToken.forceApprove(address(withdrawQueue), ezEthAmount);
        withdrawQueue.withdraw(ezEthAmount, IS_NATIVE);

        emit EzEthToWethWithdrawalStarted(ezEthAmount);
    }

    /**
     * @notice Complete a withdrawal and convert received ETH to WETH
     * @dev Claims withdrawal from queue and wraps ETH to WETH
     * @param withdrawIndex The index of the withdrawal request to claim
     */
    function completeConvertEzEthToWeth(uint256 withdrawIndex) external {
        // Complete a withdrawal from the withdrawQueue
        withdrawQueue.claim(withdrawIndex, address(this));

        // Convert received ETH to WETH
        uint256 ethBalance = address(this).balance;
        if (ethBalance > 0) {
            IWeth(address(wethToken)).deposit{ value: ethBalance }();
        }

        emit EzEthToWethWithdrawalCompleted(withdrawIndex, ethBalance);
    }

    /**
     * @notice Get the total WETH value of pending ETH withdrawals
     * @dev Iterates through outstanding withdrawal requests and calculates their current value
     * @param ezEthRate The current ezETH to ETH exchange rate (18 decimals)
     * @return uint256 Total pending withdrawals value in WETH/ETH terms
     */
    function getPendingEthWithdrawals(uint256 ezEthRate) public view returns (uint256) {
        uint256 withdrawalCount = withdrawQueue.getOutstandingWithdrawRequests(address(this));

        // Iterate and get the withdrawal amounts
        uint256 totalPending = 0;
        for (uint256 i = 0; i < withdrawalCount; i++) {
            WithdrawRequest memory request = withdrawQueue.withdrawRequests(address(this), i);

            // Sanity check - we only support native ETH withdrawals
            if (request.collateralToken != IS_NATIVE) {
                revert InvalidAsset();
            }

            // Check the current rate of ezETH - if it is lower than the withdraw request,
            // then use that (handle slashing)
            uint256 currentAmountToRedeem = (request.ezETHLocked * ezEthRate) / 1e18; // Convert to WETH value
            if (currentAmountToRedeem < request.amountToRedeem) {
                totalPending += currentAmountToRedeem;
            } else {
                totalPending += request.amountToRedeem;
            }
        }
        return totalPending;
    }

    /**
     * @notice Returns the WETH value of pending withdrawals
     * @dev Calculates value of all outstanding withdrawal requests in WETH terms using cached rate
     * @param _asset The underlying asset - must be WETH
     * @return uint256 The value of pending withdrawals in WETH terms
     */
    function underlyingValue(address _asset) external view returns (uint256) {
        // Enforce asset must be WETH
        if (_asset != address(wethToken)) {
            revert InvalidAsset();
        }

        // Get the ezETH to ETH exchange rate with 60 second cache (rate is in 18 decimals)
        uint256 ezEthRate = cachedRateProvider.getRateView(RATE_CACHE_DURATION);

        // Get pending ETH withdrawals from withdrawQueue
        uint256 pendingWeth = getPendingEthWithdrawals(ezEthRate);

        return pendingWeth;
    }

    /**
     * @notice Forces an update of the cached rate
     * @dev Calls forceUpdate on the cached rate provider to refresh the cache immediately
     * @return uint256 The newly fetched rate
     */
    function forceRateUpdate() external returns (uint256) {
        return cachedRateProvider.forceUpdate();
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.4) (token/ERC20/extensions/IERC20Permit.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
 * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
 *
 * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
 * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
 * need to send a transaction, and thus is not required to hold Ether at all.
 *
 * ==== Security Considerations
 *
 * There are two important considerations concerning the use of `permit`. The first is that a valid permit signature
 * expresses an allowance, and it should not be assumed to convey additional meaning. In particular, it should not be
 * considered as an intention to spend the allowance in any specific way. The second is that because permits have
 * built-in replay protection and can be submitted by anyone, they can be frontrun. A protocol that uses permits should
 * take this into consideration and allow a `permit` call to fail. Combining these two aspects, a pattern that may be
 * generally recommended is:
 *
 * ```solidity
 * function doThingWithPermit(..., uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public {
 *     try token.permit(msg.sender, address(this), value, deadline, v, r, s) {} catch {}
 *     doThing(..., value);
 * }
 *
 * function doThing(..., uint256 value) public {
 *     token.safeTransferFrom(msg.sender, address(this), value);
 *     ...
 * }
 * ```
 *
 * Observe that: 1) `msg.sender` is used as the owner, leaving no ambiguity as to the signer intent, and 2) the use of
 * `try/catch` allows the permit to fail and makes the code tolerant to frontrunning. (See also
 * {SafeERC20-safeTransferFrom}).
 *
 * Additionally, note that smart contract wallets (such as Argent or Safe) are not able to produce permit signatures, so
 * contracts should have entry points that don't rely on permit.
 */
interface IERC20Permit {
    /**
     * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
     * given ``owner``'s signed approval.
     *
     * IMPORTANT: The same issues {IERC20-approve} has related to transaction
     * ordering also apply here.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `deadline` must be a timestamp in the future.
     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
     * over the EIP712-formatted function arguments.
     * - the signature must use ``owner``'s current nonce (see {nonces}).
     *
     * For more information on the signature format, see the
     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
     * section].
     *
     * CAUTION: See Security Considerations above.
     */
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

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

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

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

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

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.3) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";
import "../extensions/IERC20Permit.sol";
import "../../../utils/Address.sol";

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

    /**
     * @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.encodeWithSelector(token.transfer.selector, 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.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

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

    /**
     * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 oldAllowance = token.allowance(address(this), spender);
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance + value));
    }

    /**
     * @dev Decrease the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        unchecked {
            uint256 oldAllowance = token.allowance(address(this), spender);
            require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance - value));
        }
    }

    /**
     * @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.
     */
    function forceApprove(IERC20 token, address spender, uint256 value) internal {
        bytes memory approvalCall = abi.encodeWithSelector(token.approve.selector, spender, value);

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

    /**
     * @dev Use a ERC-2612 signature to set the `owner` approval toward `spender` on `token`.
     * Revert on invalid signature.
     */
    function safePermit(
        IERC20Permit token,
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal {
        uint256 nonceBefore = token.nonces(owner);
        token.permit(owner, spender, value, deadline, v, r, s);
        uint256 nonceAfter = token.nonces(owner);
        require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed");
    }

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

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

    /**
     * @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 silents catches all reverts and returns a bool instead.
     */
    function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We cannot use {Address-functionCall} here since this should return false
        // and not revert is the subcall reverts.

        (bool success, bytes memory returndata) = address(token).call(data);
        return
            success && (returndata.length == 0 || abi.decode(returndata, (bool))) && Address.isContract(address(token));
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)

pragma solidity ^0.8.1;

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

        return account.code.length > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

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

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, "Address: low-level call failed");
    }

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

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

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

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

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

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

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

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

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

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

// SPDX-License-Identifier: BUSL-1.1
pragma solidity 0.8.27;

/**
 * @title Errors
 * @author Renzo Protocol
 * @notice This contract defines custom errors used throughout the LiquidVaults protocol
 * @dev All errors are defined as custom errors for gas efficiency
 */

/// @dev Error when Zero Input value
error InvalidZeroInput();

/// @dev Error when caller is not Rebalance admin
error NotRebalanceAdmin();

/// @dev Error when caller is not Exchange rate admin
error NotExchangeRateAdmin();

/// @dev Error when array lengths do not match
error MismatchedArrayLengths();

/// @dev Error when admin tries to execute Non whitelisted strategy
error UnAuthorizedStrategy(address strategy);

/// @dev Error when owner tries to remove non zero underlying delegate strategy
error NonZeroUnderlyingDelegateStrategy();

/// @dev Error when Withdrawal is not claimable
error WithdrawalNotClaimable();

/// @dev Error when caller try to claim invalidWithdrawIndex
error InvalidWithdrawIndex();

/// @dev Error when called is not vault
error NotUnderlyingVault();

/// @dev Error when caller is not Withdraw Queue
error NotWithdrawQueue();

/// @dev Error when caller tries to create already existing vault
error VaultAlreadyCreated();

/// @dev Error when caller is not whitelisted
error NotWhitelisted();

/// @dev Error when fee bps out of range
error InvalidFeeBps();

/// @dev Error when caller does not have pauser role
error NotPauser();

/// @dev Error when eulerswap param is invalid
error InvalidEquilibriumReserve();

/// @dev Error when pool is already installed for the euler account
error PoolAlreadyInstalled();

/// @dev Error when unexpected asset address is passed in
error InvalidAsset();

/// @dev Error when no pool is installed for the euler account when it is expected
error NoPoolInstalled();

/// @dev Error when caller is not order admin
error NotOrderAdmin();

/// @dev Error when market is not supported
error MarketNotSupported();

/// @dev Error when order already exists
error OrderAlreadyExists();

/// @dev Error when order does not exist
error OrderDoesNotExist();

/// @dev Error when decimals are invalid
error InvalidDecimals();

/// @dev Error when caller is not owner
error NotOwner();

/// @dev Error when active withdrawal is in progress
error ActiveWithdrawalInProgress();

/// @dev Error when no active withdrawal is in progress
error NoActiveWithdrawalInProgress();

/// @dev Error when active deposit is in progress
error ActiveDepositInProgress();

/// @dev Error when expected amount is invalid
error InvalidExpectedAmount();

/// @dev Error when no active deposit is in progress
error NoActiveDepositInProgress();

/// @dev Error when Oracle Price is invalid
error InvalidOraclePrice();

/// @dev Error when superstate deposit address is already set
error SuperstateAddressAlreadySet();

/// @dev Error when current tick has changed
error InvalidTick();

/// @dev Error when debt value is greater than collateral value
error InvalidDebtValue();

/// @dev Error when referral code is invalid
error InvalidReferralCode();

/// @dev Error when interest rate mode is invalid
error InvalidInterestRateMode();

/// @dev Error when market does not exist
error MarketNotExists();
/// @dev Error when caller is not minter
error NotMinter();

/// @dev Error when order has expired
error OrderExpired();

/// @dev Error when order amount is less than minimum required
error InvalidOrderAmount();

/// @dev Error when payment amount provided is not sufficient
error InsufficientPaymentAmount();

/// @dev Error when invalid fee
error InvalidFee();

/// @dev Error when market is not configured when try to remove
error MarketNotConfigured();

/// @dev Error when market is already configured when try to add
error MarketAlreadyConfigured();

/// @dev Error when new min order amount is less than processing fee
error InvalidMinOrderAmount();

// SPDX-License-Identifier: BUSL-1.1
pragma solidity 0.8.27;

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

/**
 * @title ICachedRateProvider
 * @notice Interface for the CachedRateProvider contract
 */
interface ICachedRateProvider {
    /**
     * @notice Emitted when the rate is updated from the provider
     * @param newRate The newly fetched rate
     * @param timestamp The timestamp when the rate was updated
     */
    event RateUpdated(uint256 newRate, uint256 timestamp);

    /**
     * @notice Get the rate with caching logic
     * @param allowedCacheSeconds Maximum age of cache in seconds before refresh is needed
     * @return The current rate
     */
    function getRate(uint256 allowedCacheSeconds) external returns (uint256);

    /**
     * @notice Get the rate with caching logic (view-compatible version)
     * @dev Returns cached rate if available, otherwise calls underlying provider without updating cache
     * @param allowedCacheSeconds Maximum age of cache in seconds before considering stale
     * @return The rate (cached if fresh, or from provider if stale/unavailable)
     */
    function getRateView(uint256 allowedCacheSeconds) external view returns (uint256);

    /**
     * @notice Force an immediate rate update regardless of cache state
     * @return The newly fetched rate
     */
    function forceUpdate() external returns (uint256);

    /**
     * @notice Get the underlying rate provider
     * @return The rate provider contract
     */
    function rateProvider() external view returns (IRateProvider);

    /**
     * @notice Get the last cached rate value
     * @return The cached rate
     */
    function cachedRate() external view returns (uint256);

    /**
     * @notice Get the timestamp when the rate was last updated
     * @return The last update timestamp
     */
    function lastUpdateTimestamp() external view returns (uint256);
}

// SPDX-License-Identifier: BUSL-1.1
pragma solidity 0.8.27;

/**
 * @title IDelegateStrategy
 * @author Renzo Protocol
 * @notice Interface that all delegate strategies must implement
 * @dev Delegate strategies are external contracts that manage vault assets in various DeFi protocols
 */
interface IDelegateStrategy {
    /**
     * @notice Returns the value of assets managed by this strategy
     * @dev WARNING: Don't use balanceOf(this) to avoid double counting
     * @param _asset The asset address to query the value for
     * @return The total value of the specified asset managed by this strategy
     */
    function underlyingValue(address _asset) external view returns (uint256);
}

// SPDX-License-Identifier: GPL-3.0-or-later
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

pragma solidity 0.8.27;

interface IRateProvider {
    function getRate() external view returns (uint256);
}

// SPDX-License-Identifier: BUSL-1.1
pragma solidity 0.8.27;

interface IRestakeManager {
    function depositQueue() external view returns (address);

    function calculateTVLs() external view returns (uint256[][] memory, uint256[] memory, uint256);

    function depositETH() external payable;
    function deposit(address _collateralToken, uint256 _amount) external;

    function getCollateralTokenIndex(address _collateralToken) external view returns (uint256);

    function getCollateralTokensLength() external view returns (uint256);

    function collateralTokens(uint256 index) external view returns (address);
}

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

interface IWeth {
    function deposit() external payable;

    function withdraw(uint256 value) external;
}

// SPDX-License-Identifier: BUSL-1.1
pragma solidity 0.8.27;

struct WithdrawRequest {
    address collateralToken;
    uint256 withdrawRequestID;
    uint256 amountToRedeem;
    uint256 ezETHLocked;
    uint256 createdAt;
}

interface IWithdrawQueue {
    /// @dev To get available value to withdraw from buffer
    /// @param _asset address of token
    function getAvailableToWithdraw(address _asset) external view returns (uint256);

    /// @dev To get the withdraw buffer target of given asset
    /// @param _asset address of token
    function withdrawalBufferTarget(address _asset) external view returns (uint256);

    /// @dev To get the current Target Buffer Deficit
    /// @param _asset address of token
    function getWithdrawDeficit(address _asset) external view returns (uint256);

    /// @dev Fill ERC20 Withdraw Buffer
    /// @param _asset the token address to fill the respective buffer
    /// @param _amount  amount of token to fill with
    function fillERC20WithdrawBuffer(address _asset, uint256 _amount) external;

    /// @dev to get the withdrawRequests for particular user
    /// @param _user address of the user
    function withdrawRequests(
        address _user,
        uint256 requestIndex
    ) external view returns (WithdrawRequest memory);

    /// @dev Fill ETH Withdraw buffer
    function fillEthWithdrawBuffer() external payable;

    /// @dev Get the token tvls and redeem amount
    function calculateAmountToRedeem(
        uint256 _amount,
        address _assetOut
    )
        external
        view
        returns (uint256[][] memory operatorDelegatorTokenTVLs, uint256 _amountToRedeem);

    function withdraw(uint256 _amount, address _assetOut) external;

    function getOutstandingWithdrawRequests(address user) external view returns (uint256);

    function claim(uint256 withdrawRequestIndex, address user) external;

    function stETHPendingWithdrawAmount() external view returns (uint256);
}

{
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "evmVersion": "paris",
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "metadata": {
    "useLiteralContent": true
  }
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[{"internalType":"address","name":"_ezEthToken","type":"address"},{"internalType":"address","name":"_wethToken","type":"address"},{"internalType":"address","name":"_withdrawQueue","type":"address"},{"internalType":"address","name":"_restakeManager","type":"address"},{"internalType":"address","name":"_cachedRateProvider","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"InvalidAsset","type":"error"},{"inputs":[],"name":"InvalidZeroInput","type":"error"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"withdrawIndex","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"wethAmount","type":"uint256"}],"name":"EzEthToWethWithdrawalCompleted","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"ezEthAmount","type":"uint256"}],"name":"EzEthToWethWithdrawalStarted","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"wethAmount","type":"uint256"}],"name":"WethToEzEthConversionStarted","type":"event"},{"inputs":[],"name":"IS_NATIVE","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"RATE_CACHE_DURATION","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"cachedRateProvider","outputs":[{"internalType":"contract ICachedRateProvider","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"withdrawIndex","type":"uint256"}],"name":"completeConvertEzEthToWeth","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"wethAmount","type":"uint256"}],"name":"convertWethToEzEth","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"ezEthToken","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"forceRateUpdate","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"ezEthRate","type":"uint256"}],"name":"getPendingEthWithdrawals","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"restakeManager","outputs":[{"internalType":"contract IRestakeManager","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"ezEthAmount","type":"uint256"}],"name":"startConvertEzEthToWeth","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_asset","type":"address"}],"name":"underlyingValue","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"wethToken","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"withdrawQueue","outputs":[{"internalType":"contract IWithdrawQueue","name":"","type":"address"}],"stateMutability":"view","type":"function"}]

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000000000000000000000000bf5495efe5db9ce00f80364c8b423567e58d2110000000000000000000000000c02aaa39b223fe8d0a0e5c4f27ead9083c756cc20000000000000000000000005efc9d10e42fb517456f4ac41eb5e2ebe42c891800000000000000000000000074a09653a083691711cf8215a6ab074bb4e99ef50000000000000000000000004709ab91123f7dbb4b6c4a02c94e855678404fc7

-----Decoded View---------------
Arg [0] : _ezEthToken (address): 0xbf5495Efe5DB9ce00f80364C8B423567e58d2110
Arg [1] : _wethToken (address): 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2
Arg [2] : _withdrawQueue (address): 0x5efc9D10E42FB517456f4ac41EB5e2eBe42C8918
Arg [3] : _restakeManager (address): 0x74a09653A083691711cF8215a6ab074BB4e99ef5
Arg [4] : _cachedRateProvider (address): 0x4709ab91123f7Dbb4B6C4a02C94E855678404Fc7

-----Encoded View---------------
5 Constructor Arguments found :
Arg [0] : 000000000000000000000000bf5495efe5db9ce00f80364c8b423567e58d2110
Arg [1] : 000000000000000000000000c02aaa39b223fe8d0a0e5c4f27ead9083c756cc2
Arg [2] : 0000000000000000000000005efc9d10e42fb517456f4ac41eb5e2ebe42c8918
Arg [3] : 00000000000000000000000074a09653a083691711cf8215a6ab074bb4e99ef5
Arg [4] : 0000000000000000000000004709ab91123f7dbb4b6c4a02c94e855678404fc7