// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

/// @title Chainlink Functions client interface.
interface IFunctionsClient {
  /// @notice Chainlink Functions response handler called by the Functions Router
  /// during fullilment from the designated transmitter node in an OCR round.
  /// @param requestId The requestId returned by FunctionsClient.sendRequest().
  /// @param response Aggregated response from the request's source code.
  /// @param err Aggregated error either from the request's source code or from the execution pipeline.
  /// @dev Either response or error parameter will be set, but never both.
  function handleOracleFulfillment(bytes32 requestId, bytes memory response, bytes memory err) external;
}