Understanding JSON-RPC

There are some crates that provide functionality to support the JSON-RPC protocol. Mostly, crates support only the server or the client side, not both. Some crates don't support asynchronous computations either.

How JSON-RPC works

The JSON-RPC protocol uses JSON messages in the following format for a request:

{"jsonrpc": "2.0", "method": "substring", "params": [2, 6, \"string\"], "id": 1}

The preceding JSON message calls the substring remote method of a server that can return a result like this:

{"jsonrpc": "2.0", "result": "ring", "id": 1}

It's worth nothing that a client...