This PR improves the speed of Disc/v4 and Disc/v5 based discovery by
adding a prefetch buffer to discovery sources, eliminating slowdowns
due to timeouts and rate mismatch between the two processes.
Since we now want to filter the discv4 nodes iterator, it is being removed
from the default discovery mix in p2p.Server. To keep backwards-compatibility,
the default unfiltered discovery iterator will be utilized by the server when
no protocol-specific discovery is configured.
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Signed-off-by: Csaba Kiraly <csaba.kiraly@gmail.com>
Co-authored-by: Felix Lange <fjl@twurst.com>
This adds support for naming the source iterators of FairMix, like so:
mix.AddSource(enode.WithSourceName("mySource", iter))
The source that produced the latest node is returned by the new NodeSource method.
