IAggregatorV3decimals() → uint8(external)description() → string(external)version() → uint256(external)getRoundData(uint80 _roundId) → uint80 roundId, int256 answer, uint256 startedAt, uint256 updatedAt, uint80 answeredInRound(external)latestRoundData() → uint80 roundId, int256 answer, uint256 startedAt, uint256 updatedAt, uint80 answeredInRound(external)