We need a communication hub. The hub will accept incoming websocket connections and route bi-directional communications. The communications hub is a low-level component and should have zero knowledge of what a DEX is. Incoming communications will likely be routed based on the JSON-RPC method, without parsing of the params. Outgoing messages will be directed at a particular client, all clients, or a subset of clients (as in the case of an order book subscription).

Relevant specification sections:

1. https://github.com/decred/dcrdex#Communication_Protocols
2. https://github.com/decred/dcrdex#Client_Order_Management