229 lines
7.8 KiB
Python
229 lines
7.8 KiB
Python
from contextlib import AsyncExitStack, asynccontextmanager
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from typing import Any, AsyncIterator, Dict, Tuple, cast
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from async_service import background_trio_service
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import factory
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import trio
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from libp2p import generate_new_rsa_identity, generate_peer_id_from
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from libp2p.crypto.keys import KeyPair
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from libp2p.host.basic_host import BasicHost
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from libp2p.network.connection.swarm_connection import SwarmConn
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from libp2p.network.stream.net_stream_interface import INetStream
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from libp2p.network.swarm import Swarm
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from libp2p.peer.peerstore import PeerStore
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from libp2p.pubsub.floodsub import FloodSub
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from libp2p.pubsub.gossipsub import GossipSub
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from libp2p.pubsub.pubsub import Pubsub
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from libp2p.security.base_transport import BaseSecureTransport
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from libp2p.security.insecure.transport import PLAINTEXT_PROTOCOL_ID, InsecureTransport
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import libp2p.security.secio.transport as secio
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from libp2p.stream_muxer.mplex.mplex import MPLEX_PROTOCOL_ID, Mplex
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from libp2p.stream_muxer.mplex.mplex_stream import MplexStream
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from libp2p.transport.tcp.tcp import TCP
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from libp2p.transport.typing import TMuxerOptions
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from libp2p.transport.upgrader import TransportUpgrader
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from libp2p.typing import TProtocol
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from .constants import (
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FLOODSUB_PROTOCOL_ID,
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GOSSIPSUB_PARAMS,
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GOSSIPSUB_PROTOCOL_ID,
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LISTEN_MADDR,
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)
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from .utils import connect, connect_swarm
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def security_transport_factory(
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is_secure: bool, key_pair: KeyPair
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) -> Dict[TProtocol, BaseSecureTransport]:
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if not is_secure:
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return {PLAINTEXT_PROTOCOL_ID: InsecureTransport(key_pair)}
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else:
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return {secio.ID: secio.Transport(key_pair)}
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class SwarmFactory(factory.Factory):
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class Meta:
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model = Swarm
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class Params:
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is_secure = False
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key_pair = factory.LazyFunction(generate_new_rsa_identity)
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muxer_opt = {MPLEX_PROTOCOL_ID: Mplex}
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peer_id = factory.LazyAttribute(lambda o: generate_peer_id_from(o.key_pair))
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peerstore = factory.LazyFunction(PeerStore)
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upgrader = factory.LazyAttribute(
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lambda o: TransportUpgrader(
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security_transport_factory(o.is_secure, o.key_pair), o.muxer_opt
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)
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)
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transport = factory.LazyFunction(TCP)
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@classmethod
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@asynccontextmanager
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async def create_and_listen(
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cls, is_secure: bool, key_pair: KeyPair = None, muxer_opt: TMuxerOptions = None
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) -> Swarm:
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# `factory.Factory.__init__` does *not* prepare a *default value* if we pass
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# an argument explicitly with `None`. If an argument is `None`, we don't pass it to
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# `factory.Factory.__init__`, in order to let the function initialize it.
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optional_kwargs: Dict[str, Any] = {}
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if key_pair is not None:
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optional_kwargs["key_pair"] = key_pair
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if muxer_opt is not None:
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optional_kwargs["muxer_opt"] = muxer_opt
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swarm = cls(is_secure=is_secure, **optional_kwargs)
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async with background_trio_service(swarm):
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await swarm.listen(LISTEN_MADDR)
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yield swarm
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@classmethod
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@asynccontextmanager
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async def create_batch_and_listen(
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cls, is_secure: bool, number: int, muxer_opt: TMuxerOptions = None
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) -> Tuple[Swarm, ...]:
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async with AsyncExitStack() as stack:
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ctx_mgrs = [
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await stack.enter_async_context(
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cls.create_and_listen(is_secure=is_secure, muxer_opt=muxer_opt)
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)
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for _ in range(number)
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]
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yield ctx_mgrs
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class HostFactory(factory.Factory):
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class Meta:
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model = BasicHost
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class Params:
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is_secure = False
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key_pair = factory.LazyFunction(generate_new_rsa_identity)
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public_key = factory.LazyAttribute(lambda o: o.key_pair.public_key)
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network = factory.LazyAttribute(
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lambda o: SwarmFactory(is_secure=o.is_secure, key_pair=o.key_pair)
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)
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@classmethod
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@asynccontextmanager
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async def create_batch_and_listen(
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cls, is_secure: bool, number: int
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) -> Tuple[BasicHost, ...]:
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key_pairs = [generate_new_rsa_identity() for _ in range(number)]
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async with AsyncExitStack() as stack:
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swarms = [
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await stack.enter_async_context(
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SwarmFactory.create_and_listen(is_secure, key_pair)
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)
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for key_pair in key_pairs
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]
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hosts = tuple(
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BasicHost(key_pair.public_key, swarm)
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for key_pair, swarm in zip(key_pairs, swarms)
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)
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yield hosts
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class FloodsubFactory(factory.Factory):
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class Meta:
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model = FloodSub
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protocols = (FLOODSUB_PROTOCOL_ID,)
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class GossipsubFactory(factory.Factory):
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class Meta:
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model = GossipSub
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protocols = (GOSSIPSUB_PROTOCOL_ID,)
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degree = GOSSIPSUB_PARAMS.degree
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degree_low = GOSSIPSUB_PARAMS.degree_low
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degree_high = GOSSIPSUB_PARAMS.degree_high
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time_to_live = GOSSIPSUB_PARAMS.time_to_live
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gossip_window = GOSSIPSUB_PARAMS.gossip_window
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gossip_history = GOSSIPSUB_PARAMS.gossip_history
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heartbeat_interval = GOSSIPSUB_PARAMS.heartbeat_interval
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class PubsubFactory(factory.Factory):
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class Meta:
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model = Pubsub
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host = factory.SubFactory(HostFactory)
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router = None
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my_id = factory.LazyAttribute(lambda obj: obj.host.get_id())
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cache_size = None
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@asynccontextmanager
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async def swarm_pair_factory(
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is_secure: bool, muxer_opt: TMuxerOptions = None
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) -> Tuple[Swarm, Swarm]:
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async with SwarmFactory.create_batch_and_listen(
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is_secure, 2, muxer_opt=muxer_opt
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) as swarms:
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await connect_swarm(swarms[0], swarms[1])
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yield swarms[0], swarms[1]
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@asynccontextmanager
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async def host_pair_factory(is_secure: bool) -> Tuple[BasicHost, BasicHost]:
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async with HostFactory.create_batch_and_listen(is_secure, 2) as hosts:
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await connect(hosts[0], hosts[1])
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yield hosts[0], hosts[1]
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@asynccontextmanager
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async def swarm_conn_pair_factory(
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is_secure: bool, muxer_opt: TMuxerOptions = None
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) -> Tuple[SwarmConn, SwarmConn]:
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async with swarm_pair_factory(is_secure) as swarms:
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conn_0 = swarms[0].connections[swarms[1].get_peer_id()]
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conn_1 = swarms[1].connections[swarms[0].get_peer_id()]
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yield cast(SwarmConn, conn_0), cast(SwarmConn, conn_1)
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@asynccontextmanager
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async def mplex_conn_pair_factory(is_secure: bool) -> Tuple[Mplex, Mplex]:
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muxer_opt = {MPLEX_PROTOCOL_ID: Mplex}
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async with swarm_conn_pair_factory(is_secure, muxer_opt=muxer_opt) as swarm_pair:
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yield (
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cast(Mplex, swarm_pair[0].muxed_conn),
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cast(Mplex, swarm_pair[1].muxed_conn),
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)
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@asynccontextmanager
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async def mplex_stream_pair_factory(is_secure: bool) -> Tuple[MplexStream, MplexStream]:
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async with mplex_conn_pair_factory(is_secure) as mplex_conn_pair_info:
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mplex_conn_0, mplex_conn_1 = mplex_conn_pair_info
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stream_0 = await mplex_conn_0.open_stream()
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await trio.sleep(0.01)
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stream_1: MplexStream
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async with mplex_conn_1.streams_lock:
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if len(mplex_conn_1.streams) != 1:
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raise Exception("Mplex should not have any other stream")
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stream_1 = tuple(mplex_conn_1.streams.values())[0]
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yield cast(MplexStream, stream_0), cast(MplexStream, stream_1)
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@asynccontextmanager
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async def net_stream_pair_factory(is_secure: bool) -> Tuple[INetStream, INetStream]:
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protocol_id = TProtocol("/example/id/1")
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stream_1: INetStream
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# Just a proxy, we only care about the stream
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def handler(stream: INetStream) -> None:
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nonlocal stream_1
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stream_1 = stream
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async with host_pair_factory(is_secure) as hosts:
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hosts[1].set_stream_handler(protocol_id, handler)
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stream_0 = await hosts[0].new_stream(hosts[1].get_id(), [protocol_id])
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yield stream_0, stream_1
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