Onionr/src/gossip/__init__.py

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from typing import TYPE_CHECKING, Set
from os import urandom
import queue
if TYPE_CHECKING:
from onionrblocks import Block
from .peer import Peer
from onionrthreads import add_onionr_thread
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import onionrplugins
from .client import gossip_client
from .server import gossip_server
"""
Onionr uses a flavor of Dandelion++ epidemic routing
The starter creates a peer set and passes it to the client and server
as well as each of the plugins.
The transports forward incoming requests to the gossip server
When a new peer announcement is recieved an event is fired and the transport
plugin that handles it will (or wont) create a new peer object by connecting
to that peer
When a new block is generated, it is added to a queue in raw form passed to
the starter
In stem phase, client uploads recieved (stem) blocks to 2 random peers.
In stem phase, server disables diffusion
"""
def start_gossip_threads(
peer_set: Set['Peer'], block_queue: queue.Queue['Block']):
# Peer set is largely handled by the transport plugins
# There is a unified set so gossip logic is not repeated
seed = urandom(32)
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add_onionr_thread(
gossip_server, 1, peer_set, block_queue, seed, initial_sleep=0.2)
add_onionr_thread(
gossip_client, 1, peer_set, block_queue, seed, initial_sleep=0)
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onionrplugins.events.event('gossip_start', data=peer_set, threaded=True)