pragma solidity ^0.5.0;

// AggregatorInterface specifies ChainLink aggregator interface.

interface AggregatorInterface {

function latestAnswer() external view returns (int256);

function latestTimestamp() external view returns (uint256);

function latestRound() external view returns (uint256);

function getAnswer(uint256 roundId) external view returns (int256);

function getTimestamp(uint256 roundId) external view returns (uint256);

event AnswerUpdated(int256 indexed current, uint256 indexed roundId, uint256 timestamp);

event NewRound(uint256 indexed roundId, address indexed startedBy, uint256 startedAt);

}