interface IChainlinkAggregatorV3 {
    function decimals() external view returns (uint8);

    function description() external view returns (string memory);

    function version() external view returns (uint256);

    /** @notice getRoundData and latestRoundData should both raise "No data present"
     * if they do not have data to report, instead of returning unset values
     * which could be misinterpreted as actual reported values.
     */
    function getRoundData(uint80 _roundId)
        external
        view
        returns (
            uint80 roundId,
            int256 answer,
            uint256 startedAt,
            uint256 updatedAt,
            uint80 answeredInRound
        );

    function latestRoundData()
        external
        view
        returns (
            uint80 roundId,
            int256 answer,
            uint256 startedAt,
            uint256 updatedAt,
            uint80 answeredInRound
        );
}
function getRoundData(uint80 _roundId)
    external
    view
    returns (
        uint80 roundId,
        int256 answer,
        uint256 startedAt,
        uint256 updatedAt,
        uint80 answeredInRound
    );

/** @notice getRoundData and latestRoundData should both raise "No data present"
 * if they do not have data to report, instead of returning unset values
 * which could be misinterpreted as actual reported values.
 */