Does the Unity In App Purchasing API work with the Google Daydream SDK? Is there any documentation on how the flow to purchase something while staying in VR, for instance is there a Daydream VR store overlay similar to the way Gear VR IAP’s work?
Yes, Unity IAP supports Google Daydream. The UI is the native Daydream UI that Google has created. It should fade in and be intractable in a way that makes sense in VR and then fade out when complete. The purchasing side should work the same as any other supported store.
We have some guides for how to handle UI in your VR game: