Facebook SDK automatic app events logging with StoreKit2

[max-sab]

Checklist before submitting a bug report

• I've updated to the latest released version of the SDK
• I've searched for existing GitHub issues
• I've looked for existing answers on Stack Overflow, the Facebook Developer Community Forum and the Facebook Developers Group
• I've read the Code of Conduct
• This issue is not security related and can safely be disclosed publicly on GitHub

Xcode version

15.1

Facebook iOS SDK version

16.3.1

Dependency Manager

SPM

SDK Framework

Core

Goals

We are currently making a switch from Original StoreKit to StoreKit2 in our iOS app. We have Facebook SDK of version 16.3.1 (but tried on 17.0.0 as well) that automatically logs our purchase events.

After the migration, we noticed drop in Purchase events quantity in our Events Manager.

While debugging Facebook App Events automatic logging I have noticed that purchase events that Facebook sends from mobile client to Events Manager do not work as expected when purchase is made using StoreKit2:

• when switched back to Original StoreKit - purchase event logs immediately in the Facebook debug console after the actual purchase
• when purchased using StoreKit2 - purchase event does not appear in the debug console. Sometimes they are being sent when I relaunch the app, usually not

I've researched Facebook SDK implementation and noticed that it uses public func paymentQueue(_ queue: SKPaymentQueue, updatedTransactions transactions: [SKPaymentTransaction]) to listen for the payment updates (sorry if i missed something and it's not the only method that you use)
In my case, purchase made using StoreKit2 does not trigger any events in this function right after the purchase and my theory is that it leads to the drop in our Purchase events quantity.

So my question is if this is a known issue or StoreKit2 purchases should track in the same way as Original StoreKit and it looks like something's wrong with my code?

Thanks in advance!

Expected results

After user makes a purchase either with Original StoreKit or StoreKit2, Facebook SDK sends Purchase event to Events Manager

Actual results

If i make purchase using Original StoreKit SDK -> Facebook SDK logs Purchase event immediately and everything works as expected

if I make purchase using StoreKit2 API -> no event is being tracked. sometimes it's tracked on the next app session, but usually not

Steps to reproduce

• Install Facebook SDK to your project with automatic app events logging enabled
• Initiate test session with Events Manager
• Make in-app purchase using StoreKit2
• Observe that no Purchase event is being tracked

Code samples & details

No response

[MatoMA]

We also encountered this issue. We also discovered that Firebase does not support StoreKit 2. Considering that StoreKit 2 does not have any particular advantages, we plan to fall back to StoreKit 1.

[max-sab]

Sad to hear that you've also encountered this issue

We've taken a decision to switch to StoreKit2 and Server-to-Server Notifications v2 to make it easier to handle in-app purchases and therefore it's very important for us that SDKs also support this version of StoreKit

As for now, it'd be amazing to understand whether it's widespread issue and if Facebook Mobile SDK team considers to support that

[EinfachHans]

With Storekit 1 officially being deprecated, it would be awesome to move this forward

[EgorSigolaev]

Hello guys. Do you have any news on this issue? Facing the same trouble. Running app campaign optimized on Start Trial conversion, but only 1 out of 22 trials has been tracked. Event manager also does not show Start Trial conversions. Seems Facebook SDK does not fully support Store Kit 2.

[EgorSigolaev]

Sad to hear that you've also encountered this issue

We've taken a decision to switch to StoreKit2 and Server-to-Server Notifications v2 to make it easier to handle in-app purchases and therefore it's very important for us that SDKs also support this version of StoreKit

As for now, it'd be amazing to understand whether it's widespread issue and if Facebook Mobile SDK team considers to support that

@max-sab Hello. Sorry for bothering. Could you tell me if you solved the issue? Have new Facebook SDK versions helped you?

[max-sab]

@EgorSigolaev Hi! According to changelog looks like 18.0.0 should solve the issue but I didn't have a chance to try it out yet

[EgorSigolaev]

@EgorSigolaev Hi! According to changelog looks like 18.0.0 should solve the issue but I didn't have a chance to try it out yet

Hi! I've tested 18.0.0, but it tracked a half of all purchase events. And the problem is that Facebook SDK probably verifies subscription transaction before tracking to avoid fraud. So events are tracked with a delay in 1-2 minutes.

[jiridiblik]

We also encountered this issue. Can you please have the Meta team investigate it ASAP?