Open Radar

 
Area:
StoreKit

Summary:
The subject of this report is the error which happens when testing the purchases in Sandbox environment. 

Error Domain=SKErrorDomain Code=0 “Cannot connect to iTunes Store”

I start getting this error if I do some purchases and restorations one the same user created in Sandbox Testers.

I AM logged out of my regular Apple ID when I do testing and most of the time I don't see this error. Then this error starts to happen and I have to create another fresh sandbox tester user to get rid of this error.

There is a bunch of StackOverflow topics complaining about this error and the different sources of its origin:
- Upgrading from one product to another [1] 
- Just purchasing a product [2], [3], [4]
- Using inappropriate iTunes ID

All of these links contain different answers which suggest:
- Using appropriate iTunes ID
- Check the implementation according to IAP programming guide
- Reset device!!!

[1] https://stackoverflow.com/questions/42658170/sandbox-iap-returns-error-domain-skerrordomain-code-0-cannot-connect-to-itunes
[2] https://stackoverflow.com/questions/8208195/error-domain-skerrordomain-code-0-cannot-connect-to-itunes-store?rq=1
[3] https://stackoverflow.com/questions/2359739/iphone-store-kit-cannot-connect-to-itunes-store?rq=1
[4] https://discussions.apple.com/thread/5705245?start=0&tstart=0

I know that this code 0 means `.unknown` according to error codes of SKError so this error is probably an umbrella for multiple errors that could be made more specific. When I look at recent to additions to SKError codes like this one:

        @available(iOS 10.3, *)
        case cloudServiceRevoked // user has revoked permission to use this cloud service

it makes me think that it is doable to specify these error cases that are hinding behind code 0 because as you might see from these and many other links a lot of people suffer from it: they make arbitrary hypotheses, take magical actions like resetting phone etc.

Please take any action because a lot of people want their features based on IAP to be reliable.

Steps to Reproduce:
I am not aware of a guaranteed steps to reproduce this.

I start getting this error if I do some purchases and restorations one the same user created in Sandbox Testers.

Other people report they start getting this error by:
- Upgrading from one product to another
- Just purchasing a product
- Using inappropriate iTunes ID

Expected Results:
I expect StoreKit to explain to me what is going wrong.

Observed Results:
I see StokeKit error with code 0 and it communicates nothing to me.

Version:
Xcode Version 8.3.2 (8E2002)