Just wanted to follow up with some additional information. Currently, our Digital Twin is a proof of concept suite of open source tools that can be hosted on the ThreeFold Grid. You can test it at demo.freeflow.life. A “twin” is also an entity on our TF Chain. These concepts should be linked at some point in the future, but they are currently separate.
For storage, the Twin has a nice front end for browsing, viewing, and even editing files. In the demo, this has been regular on disk storage. Later, this will be based on our Quantum Safe Storage.
Ultimately, all capabilities the Twin has are a subset of what the Grid and TF Chain are capable of. All deployments on the Grid are registered on TF Chain, but none of the data stored inside them is represented in any way on chain.
So cross chain might not be the right way to think about what the Grid can offer. Rather, the Grid provides a way to compute and store data off chain, in a way that’s deterministic and could potentially be linked somehow to on chain data on the chain of your choosing. For example, hashes of the data could be stored in the EVM chain and linked to transactions or used to verify later that the same data is present.
The main advantage to using the Grid here is that the user maintains full control of their data (assuming the workload storing that data is deployed from their own TF Chain wallet). There’s still the trick of making this a useful accessory for a dApp