Rari Fuse Price Oracle Adapters

The Rari Fuse Price Oracle Adapters

It can fetch the price of token in any quote. For example:

• ETH/USDC

• gOHM/ETH

• gOHM/USDC

and all tokens supported by Rari Fuse Pool.

/**
 * @title Rari Fuse Price Oracle Adapter
 * @author bayu <[email protected]> <https://github.com/pyk>
 * @notice Adapter for Rari Fuse Price Oracle
 */
interface IRariFusePriceOracleAdapter {
    /// ███ Types ██████████████████████████████████████████████████████████████

    /**
     * @notice Oracle metadata
     * @param oracle The Rari Fuse oracle
     * @param decimals The token decimals
     */
    struct OracleMetadata {
        IRariFusePriceOracle oracle;
        uint8 decimals;
    }


    /// ███ Events █████████████████████████████████████████████████████████████

    /**
     * @notice Event emitted when oracle data is updated
     * @param token The ERC20 address
     * @param metadata The oracle metadata
     */
    event OracleConfigured(
        address token,
        OracleMetadata metadata
    );


    /// ███ Errors █████████████████████████████████████████████████████████████

    /// @notice Error is raised when base or quote token oracle is not exists
    error OracleNotExists(address token);


    /// ███ Owner actions ██████████████████████████████████████████████████████

    /**
     * @notice Configure oracle for token
     * @param _token The ERC20 token
     * @param _rariFusePriceOracle Contract that conform IRariFusePriceOracle interface
     */
    function configure(
        address _token,
        address _rariFusePriceOracle
    ) external;


    /// ███ Read-only functions ████████████████████████████████████████████████

    /**
     * @notice Returns true if oracle for the `_token` is configured
     * @param _token The token address
     */
    function isConfigured(address _token) external view returns (bool);


    /// ███ Adapters ███████████████████████████████████████████████████████████

    /**
     * @notice Gets the price of `_token` in terms of ETH (1e18 precision)
     * @param _token Token address (e.g. gOHM)
     * @return _price Price in ETH (1e18 precision)
     */
    function price(address _token) external view returns (uint256 _price);

    /**
     * @notice Gets the price of `_base` in terms of `_quote`.
     *         For example gOHM/USDC will return current price of gOHM in USDC.
     *         (1e6 precision)
     * @param _base Base token address (e.g. gOHM/XXX)
     * @param _quote Quote token address (e.g. XXX/USDC)
     * @return _price Price in quote decimals precision (e.g. USDC is 1e6)
     */
    function price(
        address _base,
        address _quote
    ) external view returns (uint256 _price);

}oli