Wojciech Trocki I have created a link that the client can use to calculate the diff. I have tested it with our basic schema and it is working well but it is relying on the assumption that we will be able to get the complete object from the cache.

I have a PR here to show the link: https://github.com/aerogear/aerogear-js-sdk/pull/369

In reality, the link will be even more trivial than it is at the moment when/if we have that method. Investigating the server side options now.