was lambda return response

I am new to javascript and lambda functions in aws. I have a basic requirement, to be able to push the incoming message to the dynamodb and send the status back if hash matches.

the callback function is :

enter code here const done = (err, res) => callback(null, {
    statusCode: err ? '400' : '200',
    body: err ? err.message : JSON.stringify(res),
    headers: {
        'Content-Type': 'application/json',
    },
});

and from my HTTP POST call :


 case 'POST':
           const jsonval = JSON.parse(event.body);

          const hash = crypto.createHmac('sha256', 'secret')
              .update(jsonval.Item.client_name)
              .digest('base64');
              const **license_match** = (hash == jsonval.Item.license) ? 'true' : 'false';

                dynamo.putItem(jsonval, done);

        break;

I would like to return license_match (true/false) in the response object as JSON. thank you.

via firemonkey