Randomly and false-zero-Entitlements returned from purchaseProduct:withCompletion

I am thrilled to write this.  Since relocating the initialization to the root view controller there was zero incident of nil customerInfo.  @Andy, I can’t thank you enough for the 20 minutes code review, I wouldn’t have done it without it.

Please update the documentation to enforce this, otherwise apps will get in trouble for sure  

I will close the issue in few days, just because the majority of Stocks Live users will upgrade this week. 
@Andy and the rest of the team @cody, @taquitos, @Jacob Eiting, you guys are awesome, thank you so much for your time and experience, RevenueCat is one of the best companies I have ever worked with and of course it is because of the people and the founders. 

@taquitos 

We are running into this issue as well. Somehow we can’t form the json response correctly.

```

😿‼️ Unable to instantiate SubscriberData from json object: ["original_application_version": <null>, "non_subscriptions": { }, "first_seen": 2021-12-08T21:59:55Z, "original_purchase_date": <null>, "subscriptions": { }, "other_purchases": { }, "original_app_user_id": $RCAnonymousID:c8cab3a9cb4648d8828449e29194817d, "management_url": <null>, "entitlements": { }, "last_seen": 2021-12-08T21:59:55Z]

```

Just got those from a user with the latest 4.0.0-beta.3 

hope it give you any clue on what is happening.

the user reported that things are fine now after Restoring Purchases. 

Ok, just released Beta 5 https://github.com/RevenueCat/purchases-ios/releases/tag/4.0.0-beta.5
I think this should really help us home in on what is going on. 

Here is the error I got from the user above after installing Beta5. 
RCCustomerInfo: (null)
RevenueCat LastError: Error Domain=RevenueCat.ErrorCode Code=12 "Unable to instantiate a CustomerInfoResponse." UserInfo={readable_error_code=UNEXPECTED_BACKEND_RESPONSE_ERROR, NSUnderlyingError=0x28168af30 {Error Domain=RevenueCat.UnexpectedBackendResponseSubErrorCode Code=7 "(null)"}, NSLocalizedDescription=Unable to instantiate a CustomerInfoResponse.}

Latest error from user (F6862686180809447439), note that CustomerInfo is nil

App:CustomerInfo: (null)RevenueCat LastError: Error Domain=RevenueCat.ErrorCode Code=12 "Unable to instantiate a CustomerInfoResponse." UserInfo={readable_error_code=UNEXPECTED_BACKEND_RESPONSE_ERROR, NSUnderlyingError=0x283ee5d10 {Error Domain=RevenueCat.UnexpectedBackendResponseSubErrorCode Code=7 "(null)"}, NSLocalizedDescription=Unable to instantiate a CustomerInfoResponse.}

Took a little longer than expected, but here’s a new release: https://github.com/RevenueCat/purchases-ios/releases/tag/4.0.0-beta.6

We now add a lot more info to the error objects that get surfaced through the API.

@taquitos here is the latest error attached from the same user, kind enough to keep posting us, with the latest beta.6

Today, I open the app on my device and I got no in-app at all and here is my log (Restore purchases work):-

CustomerInfo: <CustomerInfo:originalApplicationVersion=,latestExpirationDate=nil,activeEntitlements=[:],activeSubscriptions=[:],nonSubscriptionTransactions=[],requestDate=2021-11-04 16:47:10 +0000,firstSeen=2021-11-04 16:47:09 +0000,originalAppUserId=U1625795716907644928,entitlements=[:]>RevenueCat LastError: (null)

@Winston Du good questions.  I get those logs that I posted by saving the error code in memory and when users contact me I embed those error codes so I can see what is going on.  It will be great if there is an api we call to get the internal state of the SDK so we can pass it along. 

@imougy I’ve made a branch called fix/name_conflicts_on_foundation_extensions, which adds a prefix to every single internal extension in our SDK, to make absolutely sure that no conflicts can happen. 

If you have a way to reproduce this issue, would you mind giving the branch a shot to see if it solve it? 

@taquitos If this is the case, let me break in my code and debug if any of my NSDate extensions are being called.  Do you think this is a good strategy?

Meanwhile, another log from the same user who can’t restore his purchases.

@taquitos I looked at your code:-

            guard let firstSeenDateString = subscriberData["first_seen"] as? String,

                  let firstSeenDate = dateFormatter.date(fromString: firstSeenDateString) else {

                return nil

            }

            self.firstSeen = firstSeenDate

            guard let originalAppUserIdString = subscriberData["original_app_user_id"] as? String else {

                return nil

            }

After you exit with nil, you call the logger.  I can’t access the logger and pass it to you (If I can please let me know how I can ask users to do that) but the error object that I attached is the one I can pass to you.  Is there a way you can add more info there so I can pass it to you?  I debugged your code and of course I see everything fine.  

Let me know how to proceed, my NSDate extension are not being called by your sdk.

I am guessing since this is a random thing, I saw empty CustomerInfo on my device from time to time, that this is not an SDK code that is causing it, it some garbage data coming from the server.

Happy to add any info if you think of any.