> For the complete documentation index, see [llms.txt](https://koii-network.gitbook.io/getting-started/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://koii-network.gitbook.io/getting-started/microservices-and-tasks/quote-of-the-day-example-task/validation-function.md).

# Audit Submission Value

A validation function is needed to verify the generated results. This function is passed to the task’s built-in validate node function and executed on each participating node.

## validateNode()

The `validateNode` function contains the core logic of how a node's submission should be verified.

Update the `validateNode` function with the code block below:

```javascript
/**
 * @description Using to validate an individual node. Returns true if node submission is valid
 */
async function validateNode(submission_value) {
  let vote;
  console.log('SUBMISSION VALUE', submission_value);
  const doodle = submission_value;

  // check the google doodle

  const browser = await puppeteer.launch();
  const page = await browser.newPage();
  await page.goto('https://www.google.com/doodles');
  let bodyHTML = await page.evaluate(() => document.documentElement.outerHTML);
  const $ = cheerio.load(bodyHTML);

  let scrapedDoodle = $('.latest-doodle.on').find('div > div > a > img').attr('src');
  if (scrapedDoodle.substring(0, 2) == '//') {
    scrapedDoodle = scrapedDoodle.substring(2, scrapedDoodle.length);
  }
  console.log({scrapedDoodle});

  // vote based on the scrapedDoodle

  try {
    if (scrapedDoodle == doodle) {
      vote = true;
    } else {
      vote = false;
    }
  } catch (e) {
    console.error(e);
    vote = false;
  }
  browser.close();
  return vote;
}
```

In the code above, the `validateNode` function takes the submission value as a parameter, repeats the logic of fetching the latest doodle, and finally compares the latest doodle and the submission value. If they're a match, the node's submission is considered valid and the function returns `true`; otherwise the function returns `false`.

## auditTask()

The `auditTask` function submits the `validateNode` function to K2 using the `validateAndVoteOnNodes` helper function.

{% hint style="info" %}
No need to edit this function when creating a task
{% endhint %}