42 lines
1.7 KiB
Python
42 lines
1.7 KiB
Python
from libp2p.host.basic_host import BasicHost
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from libp2p.host.exceptions import ConnectionFailure
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from libp2p.network.network_interface import INetworkService
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from libp2p.peer.peerinfo import PeerInfo
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from libp2p.routing.interfaces import IPeerRouting
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# RoutedHost is a p2p Host that includes a routing system.
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# This allows the Host to find the addresses for peers when it does not have them.
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class RoutedHost(BasicHost):
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_router: IPeerRouting
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def __init__(self, network: INetworkService, router: IPeerRouting):
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super().__init__(network)
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self._router = router
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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
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with given `peer_info.peer_id`. See (basic_host).connect for more
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information.
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RoutedHost's Connect differs in that if the host has no addresses for a
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given peer, it will use its routing system to try to find some.
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:param peer_info: peer_info of the peer we want to connect to
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:type peer_info: peer.peerinfo.PeerInfo
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"""
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# check if we were given some addresses, otherwise, find some with the routing system.
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if not peer_info.addrs:
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found_peer_info = await self._router.find_peer(peer_info.peer_id)
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if not found_peer_info:
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raise ConnectionFailure("Unable to find Peer address")
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self.peerstore.add_addrs(peer_info.peer_id, found_peer_info.addrs, 10)
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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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