How to handle google play notification pubsub data?

[liuzhen2008]

I am trying to setup google play pubsub notifications.

By running a subscriber on the server, whenever a user makes an auto renewal subscription, my server currently is able to receive a notification via pubsub.

The message object received looks something like this:

{ connectionId: '419b8ce1-bb35-41f5-94eb-b7e00dced8a0',
  ackId: 'fi0_RUFeQBJMJgpESVMrQwsqWBFOBCEhPjA-RVNEUAYWLF1GSFE3GQhoUQ5PXiM_NSAoRRUjKBwRY1ZedA1oXFx1BlcIEXEpMndrX0cLAk9TVm95JAxgVVt1DlEMH3R7YHNuWzuc0oyc7OBAZhw9WBJLLD4',
  id: '189709016661641',
  attributes: {},
  publishTime: Wed Aug 29 2018 04:06:06 GMT+0000 (UTC),
  received: 1535515567620,
  data: <Buffer 7b 22 76 65 72 73 69 6f 6e 22 3a 22 31 2e 30 22 2c 22 70 61 63 6b 61 67 65 4e 61 6d 65 22 3a 22 6c 6f 76 65 2e 74 68 65 63 6f 76 65 2e 61 70 70 22 2c ... >,
  length: [Getter],
  ack: [Function],
  nack: [Function] }

And after I call toString() of the buffer, the string looks like this:

{"version":"1.0","packageName":"<my-app-bundle-id>","eventTimeMillis":"1535516522925","subscriptionNotification":{"version":"1.0","notificationType":4,"purchaseToken":"hjlbomjlhaminbjangoemekb.AO-J1OwzsRLC3a6xEy8G_NcsEMjtmt8yrjw97hp4xfRbGz14OaWL339CwHpstJzHuYtNdRaAx21IFynF-KwPlwBn2rsNB62GlfTymM6DqEkTG_CyaHdOiYWByMhk11IpwDsxYyH5D4iyj7UkkDAgZmnK-wnlukXEcw","subscriptionId":"<product-purchased>"}}
My question is, what do I do with this purchaseToken? How do I obtain the signature and other data so I can pass it to iap library?

[voltrue2]

So the stringified JSON object that you have above must be given to the library's .validate() function along with a signature in an object.
The structure of the object is:

{
  data: <your purchased JSON data>,
  signature: 'purchased JSON data signature as a string'
}

[superandrew213]

@liuzhen2008 you can see here, how I made it work. Essentially you are passing a placeholder for signature.

[liuzhen2008]

@superandrew213 uh, where do I check? Did you have an example somewhere?

[liuzhen2008]

@voltrue2 Thats the problem! There are no signatures coming from google pubsub!

[liuzhen2008]

I ended up using a different library https://www.npmjs.com/package/iap for google pubsub notifications.

It would be helpful to know what I need to do so I only need to use 1 library.

[voltrue2]

Yeah I understand. I’ll try to improve the library so very soon. This update is specifically for google. I’ll let you know when it’s ready! Cheers

…

On Aug 30, 2018 at 01:26, <Liu Zhen ***@***.***)> wrote: I ended up using a different library https://www.npmjs.com/package/iap for google pubsub notifications. It would be helpful to know what I need to do so I only need to use 1 library. — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub (#207 (comment)), or mute the thread (https://github.com/notifications/unsubscribe-auth/ACKY4VuhMzRatkcFi64f5hrP6WSO35k4ks5uVsDLgaJpZM4WQzOi).

[superandrew213]

@liuzhen2008 looks like I forgot the link. Here it is: #141

Replace only xxx with your values.

{
  data: {
    packageName: "xxx",
    productId: "xxx",
    purchaseToken: "xxx",
    autoRenewing: true,
  },
  signature: 'signature',
}

[voltrue2]

@liuzhen2008 @superandrew213

I finally got to work on this. Now you can validate your receipts using Google Service Account.
It means that you only need packageName, productId, and purchaseToken to perform the validation.
Here is the commit: 709ca12

[liuzhen2008]

Awesome, i will test this out some time.
Thanks a lot

[voltrue2]

Great! Thank you for the support.

Cheers!