Net Namespace for Ethereum JSON-RPC
listening() :: {:ok, boolean} | {:error, String.t}
peer_count() :: {:ok, integer} | {:error, String.t}
send(method :: String.t, params :: map) :: {:ok, map} | {:error, String.t}
unhex(String.t) :: String.t
version() :: {:ok, float} | {:error, String.t}