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

import "../../Errors/Errors.sol";
import { ICachedRateProvider } from "../interfaces/ICachedRateProvider.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "../interfaces/IDelegateStrategy.sol";

/**
 * @author  Renzo Protocol
 * @title   ezETHValueStrategy
 * @dev     This contract provides ETH value for ezETH holdings.
 * @notice  Simple strategy that returns the ETH value of ezETH balance using a cached rate provider.
 *          This strategy only tracks value and does not perform any operations.
 */
contract ezETHValueStrategy is IDelegateStrategy {
    /// @notice ezETH token
    IERC20 public immutable ezEthToken;

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

    /// @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 Constructor
     * @param _ezEthToken Address of the ezETH token
     * @param _wethToken Address of the WETH token
     * @param _cachedRateProvider Address of the cached rate provider
     */
    constructor(address _ezEthToken, address _wethToken, address _cachedRateProvider) {
        if (_ezEthToken == address(0)) revert InvalidZeroInput();
        if (_wethToken == address(0)) revert InvalidZeroInput();
        if (_cachedRateProvider == address(0)) revert InvalidZeroInput();

        ezEthToken = IERC20(_ezEthToken);
        wethToken = IERC20(_wethToken);
        cachedRateProvider = ICachedRateProvider(_cachedRateProvider);
    }

    /**
     * @notice Returns the ETH value of ezETH holdings
     * @dev Converts ezETH balance to WETH value using the cached rate provider
     * @param _asset The underlying asset - must be WETH
     * @return uint256 The value of ezETH holdings 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 balance in this contract
        uint256 ezEthBalance = ezEthToken.balanceOf(address(this));

        // If no ezETH balance, return 0
        if (ezEthBalance == 0) {
            return 0;
        }

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

        // Convert ezETH to WETH value
        // ezETH has 18 decimals and WETH has 18 decimals
        // rate is in 18 decimals: 1 ezETH = ezEthRate ETH / 1e18
        uint256 wethValue = (ezEthBalance * ezEthRate) / 1e18;

        return wethValue;
    }

    /**
     * @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 v4.9.0) (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: 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);
}

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

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[{"inputs":[{"internalType":"address","name":"_ezEthToken","type":"address"},{"internalType":"address","name":"_wethToken","type":"address"},{"internalType":"address","name":"_cachedRateProvider","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"InvalidAsset","type":"error"},{"inputs":[],"name":"InvalidZeroInput","type":"error"},{"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":[],"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":"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"}]

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000000000000000000000000bf5495efe5db9ce00f80364c8b423567e58d2110000000000000000000000000c02aaa39b223fe8d0a0e5c4f27ead9083c756cc20000000000000000000000004709ab91123f7dbb4b6c4a02c94e855678404fc7

-----Decoded View---------------
Arg [0] : _ezEthToken (address): 0xbf5495Efe5DB9ce00f80364C8B423567e58d2110
Arg [1] : _wethToken (address): 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2
Arg [2] : _cachedRateProvider (address): 0x4709ab91123f7Dbb4B6C4a02C94E855678404Fc7

-----Encoded View---------------
3 Constructor Arguments found :
Arg [0] : 000000000000000000000000bf5495efe5db9ce00f80364c8b423567e58d2110
Arg [1] : 000000000000000000000000c02aaa39b223fe8d0a0e5c4f27ead9083c756cc2
Arg [2] : 0000000000000000000000004709ab91123f7dbb4b6c4a02c94e855678404fc7