[xwvvvvwx]

Does the SDK call out to some server running a node somewhere, or does it actually implement a client side IOTA node in JS?

[degif]

To check the data authenticity it's connecting to a node server for the data synchronisation, the data encryption happens on the client side. Client side nodes are on IOTAs roadmap as it's a technical challenge to synchronise with the network by just storing a small chunk of it.

[xwvvvvwx]

Who runs the server?

What incentive do they have to expend resources to commit data to the ledger?

How can you trust that they have committed what you asked them to?