115 lines
3.6 KiB
Python
115 lines
3.6 KiB
Python
from typing import (
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Any,
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Callable,
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Coroutine,
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List,
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Sequence,
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)
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import multiaddr
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from libp2p.network.swarm import Swarm
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from libp2p.peer.id import ID
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from libp2p.peer.peerinfo import PeerInfo
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from libp2p.peer.peerstore import PeerStore
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from libp2p.network.stream.net_stream_interface import INetStream
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from libp2p.routing.kademlia.kademlia_peer_router import KadmeliaPeerRouter
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from .host_interface import IHost
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# Upon host creation, host takes in options,
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# including the list of addresses on which to listen.
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# Host then parses these options and delegates to its Network instance,
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# telling it to listen on the given listen addresses.
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StreamHandlerFn = Callable[[INetStream], Coroutine[Any, Any, None]]
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class BasicHost(IHost):
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_network: Swarm
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router: KadmeliaPeerRouter
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peerstore: PeerStore
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# default options constructor
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def __init__(self, network: Swarm, router: KadmeliaPeerRouter = None) -> None:
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self._network = network
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self._router = router
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self.peerstore = self._network.peerstore
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def get_id(self) -> ID:
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"""
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:return: peer_id of host
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"""
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return self._network.get_peer_id()
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def get_network(self) -> Swarm:
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"""
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:return: network instance of host
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"""
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return self._network
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def get_peerstore(self) -> PeerStore:
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"""
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:return: peerstore of the host (same one as in its network instance)
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"""
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return self.peerstore
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# FIXME: Replace with correct return type
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def get_mux(self) -> Any:
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"""
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:return: mux instance of host
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"""
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def get_addrs(self) -> List[multiaddr.Multiaddr]:
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"""
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:return: all the multiaddr addresses this host is listening too
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"""
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p2p_part = multiaddr.Multiaddr('/p2p/{}'.format(self.get_id().pretty()))
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addrs: List[multiaddr.Multiaddr] = []
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for transport in self._network.listeners.values():
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for addr in transport.get_addrs():
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addrs.append(addr.encapsulate(p2p_part))
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return addrs
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def set_stream_handler(self, protocol_id: str, stream_handler: StreamHandlerFn) -> bool:
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"""
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set stream handler for host
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:param protocol_id: protocol id used on stream
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:param stream_handler: a stream handler function
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:return: true if successful
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"""
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return self._network.set_stream_handler(protocol_id, stream_handler)
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# protocol_id can be a list of protocol_ids
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# stream will decide which protocol_id to run on
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async def new_stream(self, peer_id: ID, protocol_ids: Sequence[str]) -> INetStream:
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"""
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:param peer_id: peer_id that host is connecting
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:param protocol_id: protocol id that stream runs on
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:return: stream: new stream created
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"""
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return await self._network.new_stream(peer_id, protocol_ids)
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async def connect(self, peer_info: PeerInfo) -> None:
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"""
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connect ensures there is a connection between this host and the peer with
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given peer_info.peer_id. connect will absorb the addresses in peer_info into its internal
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peerstore. If there is not an active connection, connect will issue a
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dial, and block until a connection is open, or an error is
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returned.
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:param peer_info: peer_info of the host we want to connect to
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:type peer_info: peer.peerinfo.PeerInfo
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"""
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self.peerstore.add_addrs(peer_info.peer_id, peer_info.addrs, 10)
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# there is already a connection to this peer
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if peer_info.peer_id in self._network.connections:
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return
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await self._network.dial_peer(peer_info.peer_id)
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