46 lines
1.2 KiB
Python
46 lines
1.2 KiB
Python
import ast
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from typing import (
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Union,
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)
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from libp2p.kademlia.kad_peerinfo import (
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KadPeerInfo,
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create_kad_peerinfo,
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)
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from libp2p.kademlia.network import KademliaServer
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from libp2p.peer.id import ID
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from libp2p.routing.interfaces import IPeerRouting
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class KadmeliaPeerRouter(IPeerRouting):
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# pylint: disable=too-few-public-methods
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server: KademliaServer
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def __init__(self, dht_server: KademliaServer) -> None:
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self.server = dht_server
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async def find_peer(self, peer_id: ID) -> KadPeerInfo:
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"""
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Find a specific peer
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:param peer_id: peer to search for
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:return: KadPeerInfo of specified peer
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"""
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# switching peer_id to xor_id used by kademlia as node_id
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xor_id = peer_id.get_xor_id()
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value = await self.server.get(xor_id)
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return decode_peerinfo(value)
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def decode_peerinfo(encoded: Union[bytes, str]) -> KadPeerInfo:
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if isinstance(encoded, bytes):
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encoded = encoded.decode()
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try:
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lines = ast.literal_eval(encoded)
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except SyntaxError:
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return None
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ip = lines[1] # pylint: disable=invalid-name
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port = lines[2]
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peer_id = lines[3]
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peer_info = create_kad_peerinfo(peer_id, ip, port)
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return peer_info
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