App
Contains the RPC server [App] wiring the RPC calls to the respective methods in [Wollet] or [Signer].
The server can be configured via the [Config] struct and a convenient cli exists to call it.
It also contains the RPC client [Client].
Both the client and the server share the possible [Error]s.
All the requests and responses data model are in the [lwk_rpc_model] crate.