1  // SPDX-License-Identifier: MIT
 2  pragma solidity >=0.6.0;
 3  
 4  interface AggregatorV3Interface {
 5  
 6      function decimals() external view returns (uint8);
 7      function description() external view returns (string memory);
 8      function version() external view returns (uint256);
 9  
10      // getRoundData and latestRoundData should both raise "No data present"
11      // if they do not have data to report, instead of returning unset values
12      // which could be misinterpreted as actual reported values.
13      function getRoundData(uint80 _roundId)
14          external
15          view
16          returns
17      (
18          uint80 roundId,
19          int256 answer,
20          uint256 startedAt,
21          uint256 updatedAt,
22          uint80 answeredInRound
23      );
24  
25      function latestRoundData()
26          external
27          view
28          returns
29      (
30          uint80 roundId,
31          int256 answer,
32          uint256 startedAt,
33          uint256 updatedAt,
34          uint80 answeredInRound
35      );
36  
37  }