Hydration API for offline-first?

[oshimayoan]

Howdy!

I wonder if the new hydration API can be used to implement offline-first on RN? If yes, I think there is a problem on this line:

https://github.com/tannerlinsley/react-query/blob/e200c99496b7ebea84da5a0df38242d80554a844/src/hydration/hydration.ts#L85

It appears that line will never let the dehydratedState to overwrite the queryCache. The reason is that when a useQuery is executed with the same exact queryKey as the dehydrated, it will automatically create a new query on queryCache with newer updatedAt so that line above will always return true.

Also, the reason why useQuery is executed first before useHydrate is that I have to get the persisted state from AsyncStorage first.