ChainlinkHackathon/OpenLibrary/Client.sol

Client.sol

pragma solidity ^0.6.0;

import "https://github.com/smartcontractkit/chainlink/blob/master/evm-contracts/src/v0.6/ChainlinkClient.sol";

contract Client is ChainlinkClient {
    // where to store the last id scanned
    bytes32 public last_uid;
    // chainlink vars for communicating with the RFID external adapter
    address private oracle;
    bytes32 private jobId;
    uint256 private fee;
   
    constructor() public {
        setPublicChainlinkToken();
        oracle = 0x42149D794A135989319b66Dbcb770Ad36075a92e;
        jobId = "785558e0bed6466b9567322cc2f4ca91";
        fee = .1 * 10 ** 18; // 0.1 LINK
    }
    

    function requestData() public returns (bytes32 requestId) {
        // creates the Request
        Chainlink.Request memory req = buildChainlinkRequest(jobId, address(this), this.fulfill.selector);
        // Sends the request
        return sendChainlinkRequestTo(oracle, req, fee);
    }
    
    function fulfill(bytes32 _requestId, bytes32 uid) public recordChainlinkFulfillment(_requestId) {
        last_uid = uid;
    }
}