EthFiddle - Solidity IDE in the Browser. Powered By Loom Network

//SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

import "@chainlink/contracts/src/v0.8/ChainlinkClient.sol";
import "@chainlink/contracts/src/v0.8/ConfirmedOwner.sol";

contract OFCaller is ChainlinkClient, ConfirmedOwner {
	using Chainlink for Chainlink.Request;

uint256 constant private ORACLE_PAYMENT = 1 * LINK_DIVISIBILITY;
	string public lastResponse;
	string public jobId;
	address public oracle;

event StartedExecution();

event FinishedExecution(
		bytes32 indexed requestId,
		string indexed response
	);

constructor(address _link, address _oracle, string memory _jobId) ConfirmedOwner(msg.sender){
		setChainlinkToken(_link);
		oracle = _oracle;
		jobId = _jobId;
	}

function invokeApp(string memory url, string memory data)
	public
	onlyOwner
	{
		emit StartedExecution();
		Chainlink.Request memory req = buildOperatorRequest(stringToBytes32(jobId), this.fulfillInvokeApp.selector);
		req.add("id", "0");
		req.add("url", url);
		req.add("data", data);
		sendOperatorRequestTo(oracle, req, 0);
	}

function fulfillInvokeApp(bytes32 requestId, string memory response)
	public
	{
		emit FinishedExecution(requestId, response);
		lastResponse = response;
	}

function stringToBytes32(string memory source) private pure returns (bytes32 result) {
		bytes memory tempEmptyStringTest = bytes(source);
		if (tempEmptyStringTest.length == 0) {
			return 0x0;
		}

assembly {// solhint-disable-line no-inline-assembly
			result := mload(add(source, 32))
		}
	}
}