async def maybe_connect_more_peers(self) -> None:
while self.is_operational:
await self.sleep(DISOVERY_INTERVAL)
available_peer_slots = self.max_peers - len(self)
if available_peer_slots > 0:
try:
response = await self.wait(
# TODO: This should use a BroadcastConfig to send the request to discovery
# only as soon as we have cut a new Lahja release.
self.event_bus.request(
PeerCandidatesRequest(available_peer_slots)),
timeout=REQUEST_PEER_CANDIDATE_TIMEOUT)
except TimeoutError:
self.logger.warning(
"Discovery did not answer PeerCandidateRequest in time"
)
continue
# In some cases (e.g ROPSTEN or private testnets), the discovery table might be
# full of bad peers so if we can't connect to any peers we try a random bootstrap
# node as well.
if not len(self):
try:
response = await self.wait(
# TODO: This should use a BroadcastConfig to send the request to
# discovery only as soon as we have cut a new Lahja release.
self.event_bus.request(RandomBootnodeRequest()),
timeout=REQUEST_PEER_CANDIDATE_TIMEOUT)
except TimeoutError:
self.logger.warning(
"Discovery did not answer RandomBootnodeRequest in time"
)
continue
self.logger.debug2("Received candidates to connect to (%s)",
response.candidates)
await self.connect_to_nodes(from_uris(response.candidates))
async def accept_connect_commands(self) -> None:
async for command in self.wait_iter(
self.event_bus.stream(ConnectToNodeCommand)):
self.logger.debug('Received request to connect to %s',
command.node)
self.run_task(self.connect_to_nodes(from_uris([command.node])))