how to create expire token firebase cloud function?

Question

I want to create and send Link "firebase dynamic link" with expire token with firebase cloud function that :

only the user who received the mail can use it.
Token will be expire after 24 hour.

exports.orderDynamicLink = functions.database
  .ref("order/{orderId}")
  .onWrite((event) => {
    const options = {
      method: "POST",
      uri: `https://firebasedynamiclinks.googleapis.com/v1/shortLinks?key=${
        functions.config().applinks.key
      }`,

// I want to generate and add here the expire token

      body: {
        dynamicLinkInfo: {
          domainUriPrefix: "https://example.page.link",
          link: "https://www.example.com/",
          androidInfo: {
            androidPackageName: "com.example.android",
          },
          iosInfo: {
            iosBundleId: "com.example.ios",
          },
        },
      },
      json: true,
    };

    request(options).then(function (parsedBody) {
      console.log(parsedBody);
      sendEmailLink(parsedBody.shortLink);
      return parsedBody.shortLink;
    });
  });

function sendEmailLink(link) {
  //google account credentials used to send email
  var transporter = nodemailer.createTransport({
    host: "smtp.gmail.com",
    port: 465,
    secure: true,
    auth: {
      user: "***********@gmail.com",
      pass: "yourpassword",
    },
  });

  const mailOptions = {
    from: `***********`,
    to: snap.data().email,
    subject: "contact form message",
    html: `<h1> tou can make a Order using this link</h1>
                                <p>
                                   <b>link: </b>${link}<br>
                                </p>`,
  };

  return transporter.sendMail(mailOptions, (error, data) => {
    if (error) {
      console.log(error);
      return;
    }
    console.log("Sent!");
  });
}

I want to know how to achieve that : how can I create the token, how to make it expire ? how to store it ? and how to verify it when the user use the link if it valid or not ? with firebase cloud function .

Sorry for my bad English .

score 0 · Answer 1 · answered Oct 18 '20 at 16:48

You could try to use Manage Session Cookies, which is stored at server side and you can set custom expiration times from 5 minutes to 2 weeks.

Or you could also set up custom expiry logic, pass timestamp and other params to the link URL, and then add time checking logic at server side to validate. The thread provides more information on how to do it.

how to create expire token firebase cloud function?

1 Answers1