FDAConsumer.sol

/** This example code is designed to quickly deploy an example contract using Remix.
 *  If you have never used Remix, try our example walkthrough: https://docs.chain.link/docs/example-walkthrough
 *  You will need testnet ETH and LINK.
 *     - Kovan ETH faucet: https://faucet.kovan.network/
 *     - Kovan LINK faucet: https://kovan.chain.link/
 */

pragma solidity ^0.6.0;

import "https://raw.githubusercontent.com/smartcontractkit/chainlink/develop/evm-contracts/src/v0.6/ChainlinkClient.sol";

contract FDAConsumer is ChainlinkClient {
  
    uint256 public enforcementActions;
    
    address private oracle;
    bytes32 private jobId;
    uint256 private fee;
    
    /**
     * Network: Kovan
     * Oracle: Chainlink - 0x2f90A6D021db21e1B2A077c5a37B3C7E75D15b7e
     * Job ID: Chainlink - 29fa9aa13bf1468788b7cc4a500a45b8
     * Fee: 0.1 LINK
     */
    constructor() public {
        setPublicChainlinkToken();
        oracle = 0x2f90A6D021db21e1B2A077c5a37B3C7E75D15b7e;
        jobId = "29fa9aa13bf1468788b7cc4a500a45b8";
        fee = 0.1 * 10 ** 18; // 0.1 LINK
    }
    
    /**
     * Create a Chainlink request to retrieve API response, find the target
     * data, then multiply by 1000000000000000000 (to remove decimal places from data).
     */
    function requestEnforcementData() public returns (bytes32 requestId) 
    {
        Chainlink.Request memory request = buildChainlinkRequest(jobId, address(this), this.fulfill.selector);
    
        request.add("get", "https://api.fda.gov/food/enforcement.json?search=report_date:[2015101+TO+20151231]&limit=1");
        request.add("path", "meta.results.total");
        // If you are returning a decminal, remember to multiply!
        // int timesAmount = 10**18;
        // request.addInt("times", timesAmount);
        
        // Sends the request
        return sendChainlinkRequestTo(oracle, request, fee);
    }
    
    /**
     * Receive the response in the form of uint256
     */ 
    function fulfill(bytes32 _requestId, uint256 _enforcementActions) public recordChainlinkFulfillment(_requestId)
    {
        enforcementActions = _enforcementActions;
    }
    
    /**
     * Withdraw LINK from this contract
     * 
     * NOTE: DO NOT USE THIS IN PRODUCTION AS IT CAN BE CALLED BY ANY ADDRESS.
     * THIS IS PURELY FOR EXAMPLE PURPOSES ONLY.
     */
    function withdrawLink() external {
        LinkTokenInterface linkToken = LinkTokenInterface(chainlinkTokenAddress());
        require(linkToken.transfer(msg.sender, linkToken.balanceOf(address(this))), "Unable to transfer");
    }
}