How to check if node is synced?

[altafan]

There doesn't seem to be a way to check if or be notified when the node is synced.

The service does actually make use of a channel to notify when it's synced with the chain, but there's no API to make the client receiving that message at the moment.

Another error is that the message is written to the channel right after spawning the go routines, without waiting for any of them to complete their job.