(
    uint80 roundID,
    int256 price,
    ,
    uint256 timeStamp,
    uint80 answeredInRound
) = chainlink.latestRoundData();
require(
    timeStamp != 0,
    ChainlinkOracle::getLatestAnswer: round is not complete
);
require(
    answeredInRound >= roundID,
    ChainlinkOracle::getLatestAnswer: stale data
);
require(price != 0, "Chainlink Malfunction);
