// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

import { Ownable } from "../utils/Ownable.sol";
import { IAggregator } from "../interfaces/IAggregator.sol";
import { IAdapter } from "../interfaces/IAdapter.sol";
import { IOracle } from "../interfaces/IOracle.sol";
import { IERC4626 } from "../interfaces/IERC4626.sol";
import { IERC20 } from "../interfaces/IERC20.sol";

///@title RatioAdapter
///@author HyperLend
///@notice An adapter returning price of some asset with certain ratio to the underlying asset
contract RatioAdapter is Ownable, IAdapter {
    /// @notice contract providing price of the underlying asset
    IOracle public priceProvider;
    /// @notice contract providing the ratio between wrapped and underlying asset
    IOracle public ratioProvider;

    /// @notice the description of the price source
    string public description;
    /// @notice the number of decimals the aggregator responses represent
    uint8 public decimals;
    /// @notice address of the underlying token
    IERC20 public asset;
    ///@notice decimals of the ratio oracle
    uint8 public ratioDecimals;

    /// @param _priceProvider contract providing price of the underlying asset
    /// @param _description the description of the price source
    /// @param _asset address of the underlying asset
    /// @param _ratioProvider contract providing the ratio between wrapped and underlying asset
    constructor(address _priceProvider, string memory _description, address _asset, address _ratioProvider) Ownable(msg.sender) {
        priceProvider = IOracle(_priceProvider);
        description = _description;
        decimals = priceProvider.decimals();
        asset = IERC20(_asset);
        ratioProvider = IOracle(_ratioProvider);
        ratioDecimals = ratioProvider.decimals();
    }

    /// @notice returns the latest price
    function latestAnswer() external view returns (int256) {
        ( , int256 answer , , , ) = getData();
        return answer;
    }

    /// @notice returns the latest price in chainlink-compatible format 
    function latestRoundData() external view returns (
        uint80 roundId,
        int256 answer,
        uint256 startedAt,
        uint256 updatedAt,
        uint80 answeredInRound
    ){  
        return getData();
    }

    function getData() internal view returns (
        uint80 roundId,
        int256 answer,
        uint256 startedAt,
        uint256 updatedAt,
        uint80 answeredInRound
    ) {
        (
            uint80 _roundId,
            int256 _answer,
            uint256 _startedAt,
            uint256 _updatedAt,
            uint80 _answeredInRound
        ) = priceProvider.latestRoundData();
        require(_answer > 0, "price <= 0");

        (, int256 _ratioAnswer ,,,) = ratioProvider.latestRoundData();

        answer = _answer * _ratioAnswer / int256(10**ratioDecimals);

        //return round data for the underlying price
        roundId = _roundId;
        startedAt = _startedAt;
        updatedAt = _updatedAt;
        answeredInRound = _answeredInRound;
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

interface IAdapter {
    function latestAnswer() external view returns (int256);
    function decimals() external view returns (uint8);
    function description() external view returns (string memory);
    function latestRoundData() external view returns (uint80 roundId, int256 answer, uint256 startedAt, uint256 updatedAt, uint80 answeredInRound);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

interface IAggregator {
    function getPrice(address asset) external view returns (uint256);
    function getUpdateTimestamp(address asset) external view returns (uint256);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.20;

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);
    /**
     * @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
pragma solidity ^0.8.20;

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

/// @title ERC4626 interface
/// See: https://eips.ethereum.org/EIPS/eip-4626
interface IERC4626 is IERC20 {
    /*////////////////////////////////////////////////////////
                      Events
    ////////////////////////////////////////////////////////*/

    /// @notice `sender` has exchanged `assets` for `shares`,
    /// and transferred those `shares` to `receiver`.
    event Deposit(address indexed sender, address indexed receiver, uint256 assets, uint256 shares);

    /// @notice `sender` has exchanged `shares` for `assets`,
    /// and transferred those `assets` to `receiver`.
    event Withdraw(address indexed sender, address indexed receiver, uint256 assets, uint256 shares);

    /*////////////////////////////////////////////////////////
                      Vault properties
    ////////////////////////////////////////////////////////*/

    /// @notice The address of the underlying ERC20 token used for
    /// the Vault for accounting, depositing, and withdrawing.
    function asset() external view returns (address asset);

    /// @notice Total amount of the underlying asset that
    /// is "managed" by Vault.
    function totalAssets() external view returns (uint256 totalAssets);

    /*////////////////////////////////////////////////////////
                      Deposit/Withdrawal Logic
    ////////////////////////////////////////////////////////*/

    /// @notice Mints `shares` Vault shares to `receiver` by
    /// depositing exactly `assets` of underlying tokens.
    function deposit(uint256 assets, address receiver) external returns (uint256 shares);

    /// @notice Mints exactly `shares` Vault shares to `receiver`
    /// by depositing `assets` of underlying tokens.
    function mint(uint256 shares, address receiver) external returns (uint256 assets);

    /// @notice Redeems `shares` from `owner` and sends `assets`
    /// of underlying tokens to `receiver`.
    function withdraw(
        uint256 assets,
        address receiver,
        address owner
    ) external returns (uint256 shares);

    /// @notice Redeems `shares` from `owner` and sends `assets`
    /// of underlying tokens to `receiver`.
    function redeem(
        uint256 shares,
        address receiver,
        address owner
    ) external returns (uint256 assets);

    /*////////////////////////////////////////////////////////
                      Vault Accounting Logic
    ////////////////////////////////////////////////////////*/

    /// @notice 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.
    function convertToShares(uint256 assets) external view returns (uint256 shares);

    /// @notice 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.
    function convertToAssets(uint256 shares) external view returns (uint256 assets);

    /// @notice Total number of underlying assets that can
    /// be deposited by `owner` into the Vault, where `owner`
    /// corresponds to the input parameter `receiver` of a
    /// `deposit` call.
    function maxDeposit(address owner) external view returns (uint256 maxAssets);

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

    /// @notice Total number of underlying shares that can be minted
    /// for `owner`, where `owner` corresponds to the input
    /// parameter `receiver` of a `mint` call.
    function maxMint(address owner) external view returns (uint256 maxShares);

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

    /// @notice Total number of underlying assets that can be
    /// withdrawn from the Vault by `owner`, where `owner`
    /// corresponds to the input parameter of a `withdraw` call.
    function maxWithdraw(address owner) external view returns (uint256 maxAssets);

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

    /// @notice Total number of underlying shares that can be
    /// redeemed from the Vault by `owner`, where `owner` corresponds
    /// to the input parameter of a `redeem` call.
    function maxRedeem(address owner) external view returns (uint256 maxShares);

    /// @notice Allows an on-chain or off-chain user to simulate
    /// the effects of their redeemption at the current block,
    /// given current on-chain conditions.
    function previewRedeem(uint256 shares) external view returns (uint256 assets);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

interface IOracle {
    function latestAnswer() external view returns (uint256);
    function latestRoundData() external view returns (
        uint80 roundId,
        int256 answer,
        uint256 startedAt,
        uint256 updatedAt,
        uint80 answeredInRound
    );
    function decimals() external view returns (uint8);
}

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

pragma solidity ^0.8.20;

/**
 * @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 Context {
    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 v5.0.0) (access/Ownable.sol)
pragma solidity ^0.8.20;

import {Context} from "./Context.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 Ownable is Context {
    address private _owner;

    /**
     * @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.
     */
    constructor(address initialOwner) {
        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) {
        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 {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

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

• No Contract Security Audit Submitted- Submit Audit Here

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