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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.13;

import { Address } from "@openzeppelin/contracts/utils/Address.sol";
import { IERC20Upgradeable } from "@openzeppelin/contracts-upgradeable/interfaces/IERC20Upgradeable.sol";

interface IUserModule is IERC20Upgradeable {
    function deposit(uint256 assets_, address receiver_) external returns (uint256 shares_);

    function withdraw(
        uint256 assets_,
        address receiver_,
        address owner_
    ) external returns (uint256 shares_);

    function getWithdrawFee(uint256 stEthAmount_) external view returns (uint256);
}

contract EthVaultWrapper {
    address internal constant ONE_INCH_AGGREGATION_ROUTER = 0x1111111254EEB25477B68fb85Ed929f73A960582;
    IERC20Upgradeable internal constant STETH = IERC20Upgradeable(0xae7ab96520DE3A18E5e111B5EaAb095312D7fE84);
    IUserModule internal immutable vault;

    error EthVaultWrapper__OutputInsufficient();
    error EthVaultWrapper__UnexpectedWithdrawAmount();

    constructor(address vault_) {
        vault = IUserModule(vault_);

        // approve stETH to vault for deposits
        STETH.approve(vault_, type(uint256).max);
    }

    /// @notice deposits msg.value as stETH into ETH vault. returns shares amount
    /// @param swapCalldata_ 1inch swap data for ETH -> stETH to call AggregationRouter with
    /// @param minStEthIn_ minimum expected stETH to be deposited
    /// @param receiver_ receiver of iToken shares from deposit
    /// @return actual amount of shares received
    function deposit(
        bytes calldata swapCalldata_,
        uint256 minStEthIn_,
        address receiver_
    ) external payable returns (uint256) {
        // swap msg.value to stETH via 1inch
        bytes memory response_ = Address.functionCallWithValue(
            ONE_INCH_AGGREGATION_ROUTER,
            swapCalldata_,
            msg.value,
            "EthVaultWrapper: swap fail"
        );

        // ensure expected minimum output
        (uint256 depositAmount_, ) = abi.decode(response_, (uint256, uint256));

        if (depositAmount_ < minStEthIn_) {
            revert EthVaultWrapper__OutputInsufficient();
        }

        // deposit output into vault for msg.sender as receiver
        return vault.deposit(depositAmount_, receiver_);
    }

    /// @notice withdraws amount_ of stETH from msg.sender as owner and swaps it to ETH then transfers to msg.sender
    /// @param amount_ amount of stETH to withdraw
    /// @param swapCalldata_ 1inch swap data for stETH -> ETH to call AggregationRouter with
    /// @param minEthOut_ minimum expected output ETH
    /// @param receiver_ receiver of withdrawn ETH
    /// @return ethAmount_ actual output ETH
    function withdraw(
        uint256 amount_,
        bytes calldata swapCalldata_,
        uint256 minEthOut_,
        address receiver_
    ) external returns (uint256 ethAmount_) {
        uint256 stEthBalanceBefore = STETH.balanceOf(address(this));
        uint256 withdrawFee = vault.getWithdrawFee(amount_);
        // withdraw amount from vault from msg.sender owner with this contract as receiver
        vault.withdraw(amount_, address(this), msg.sender);

        uint256 withdrawnAmount = STETH.balanceOf(address(this)) - stEthBalanceBefore;

        // -1 to account for potential rounding errors
        if (withdrawnAmount + withdrawFee < amount_ - 1) {
            revert EthVaultWrapper__UnexpectedWithdrawAmount();
        }

        // approve stETH to 1inch router
        STETH.approve(ONE_INCH_AGGREGATION_ROUTER, withdrawnAmount);

        // swap stETH to ETH via 1inch
        bytes memory response_ = Address.functionCall(
            ONE_INCH_AGGREGATION_ROUTER,
            swapCalldata_,
            "EthVaultWrapper: swap fail"
        );

        // ensure expected minimum output
        (ethAmount_, ) = abi.decode(response_, (uint256, uint256));
        if (ethAmount_ < minEthOut_) {
            revert EthVaultWrapper__OutputInsufficient();
        }

        // transfer eth to receiver (usually msg.sender)
        payable(receiver_).transfer(ethAmount_);
    }

    /// @notice gets the amount of stETH that must be swapped to ETH via 1inch for a withdraw
    /// @param amount_ amount of stETH to withdraw
    /// @return stEthSwapAmount_ to amount of stEth to be swapped to ETH
    function getWithdrawSwapAmount(uint256 amount_) external view returns (uint256 stEthSwapAmount_) {
        uint256 withdrawFee = vault.getWithdrawFee(amount_);
        stEthSwapAmount_ = amount_ - withdrawFee;
    }

    receive() external payable {}
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (interfaces/IERC20.sol)

pragma solidity ^0.8.0;

import "../token/ERC20/IERC20Upgradeable.sol";

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

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20Upgradeable {
    /**
     * @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 v4.8.0) (utils/Address.sol)

pragma solidity ^0.8.1;

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

        return account.code.length > 0;
    }

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

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

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

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

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

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

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

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

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

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

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

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

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

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

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[{"internalType":"address","name":"vault_","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"EthVaultWrapper__OutputInsufficient","type":"error"},{"inputs":[],"name":"EthVaultWrapper__UnexpectedWithdrawAmount","type":"error"},{"inputs":[{"internalType":"bytes","name":"swapCalldata_","type":"bytes"},{"internalType":"uint256","name":"minStEthIn_","type":"uint256"},{"internalType":"address","name":"receiver_","type":"address"}],"name":"deposit","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount_","type":"uint256"}],"name":"getWithdrawSwapAmount","outputs":[{"internalType":"uint256","name":"stEthSwapAmount_","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount_","type":"uint256"},{"internalType":"bytes","name":"swapCalldata_","type":"bytes"},{"internalType":"uint256","name":"minEthOut_","type":"uint256"},{"internalType":"address","name":"receiver_","type":"address"}],"name":"withdraw","outputs":[{"internalType":"uint256","name":"ethAmount_","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"stateMutability":"payable","type":"receive"}]

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000000000000000000000000a0d3707c569ff8c87fa923d3823ec5d81c98be78

-----Decoded View---------------
Arg [0] : vault_ (address): 0xA0D3707c569ff8C87FA923d3823eC5D81c98Be78

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 000000000000000000000000a0d3707c569ff8c87fa923d3823ec5d81c98be78