aave-protocol-v2/contracts/interfaces/IChainlinkAggregator.sol

// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.6.12;

interface IChainlinkAggregator {
  function decimals() external view returns (uint8);
  
  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);
}