This library currently contains:
jsonrpc- a JSONRPC-2.0 library with support for subscriptions/notifications.electrum- a TCP JSON-RPC Electrum client that supports a subset of the Electrum Server RPC methods.failover- a generic package that lets a client connect to many servers for redundancy, with support for subscriptions/notifications. The primary use case at the moment is to provide failover support for the electrum client in case a server is down or errors in other ways, but it is generic enough to be useful in other contexts.
The API of this library is currenly unstable. Expect frequent breaking changes until we start tagging versions.