So far we were papering over the actual error with a generic string
that isn't very useful. Now we decode the error and forward it through
the grpc layer as well (though still as a string).
We wrap emitted messages into a JSON-RPC notification envelope and
write them to stdout. We use an indirection over an mpsc channel in
order to avoid deadlocks if we emit logs while holding the writer lock
on stdout.
Christian Decker
Vincenzo Palazzo