pragma solidity ^0.4.24; interface ChainlinkRequestInterface { function oracleRequest( address sender, uint256 payment, bytes32 id, address callbackAddress, bytes4 callbackFunctionId, uint256 nonce, uint256 version, bytes data ) external; function cancelOracleRequest( bytes32 requestId, uint256 payment, bytes4 callbackFunctionId, uint256 expiration ) external; }