cosmjs

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Continuing a discussion from https://github.com/confio/cosmwasm-js/pull/99

@webmaster128 had concerns with the Stream interface we provide, both polling and websockets (with reconnect issues). These are important concerns as he has worked with said interface around a year at iov and has had many learnings.

That said, the entire design of "reactive frontend apps" is only getting bigger and bigger and I would like to work out some way to support that, even if it involved changes to a backend rpc server. Let us explore what other popular frameworks do and how they handle edge cases about breaking subscriptions, etc.

Some good examples:

Meteor

• First (popular) full-stack reactive framework. This controls client and server and pushes changes when they happen for fast updates.
• ServerConnections API
• How pubsub work (subscriptions)
• They use websockets, but I can't find docs on the internal

Apollo

• GraphQL queries
• Supports many frontend frameworks
• Nice discussion of subscriptions vs polling
• subscriptions-transport-ws is the transport layer that handles subscriptions
• But they have some issues around reconnect, look at this one in particular for a deeper analysis of their issues

I'd love to hear a deeper look into these protocols or other references. I don't think anyone has a perfect solution, but good to look how they tackle these problems (and maybe we can build on one?)