49 lines
1.4 KiB
Python
49 lines
1.4 KiB
Python
import multiaddr
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from .id import id_b58_decode
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from .peerdata import PeerData
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class PeerInfo:
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# pylint: disable=too-few-public-methods
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def __init__(self, peer_id, peer_data=None):
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self.peer_id = peer_id
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self.addrs = peer_data.get_addrs() if peer_data else None
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def info_from_p2p_addr(addr: multiaddr.Multiaddr) -> PeerInfo:
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if not addr:
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raise InvalidAddrError("addr should not be None")
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if not isinstance(addr, multiaddr.Multiaddr):
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raise InvalidAddrError(f"addr={addr} should be in type Multiaddr")
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parts = addr.split()
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if not parts:
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raise InvalidAddrError()
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p2p_part = parts[-1]
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last_protocol_code = p2p_part.protocols()[0].code
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if last_protocol_code != multiaddr.protocols.P_P2P:
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raise InvalidAddrError(
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f"the last protocol should be P_P2P instead of {last_protocol_code}"
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)
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# make sure the /p2p value parses as a peer.ID
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peer_id_str = p2p_part.value_for_protocol(multiaddr.protocols.P_P2P)
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peer_id = id_b58_decode(peer_id_str)
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# we might have received just an / p2p part, which means there's no addr.
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if len(parts) > 1:
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addr = multiaddr.Multiaddr.join(*parts[:-1])
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peer_data = PeerData()
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peer_data.addrs = [addr]
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peer_data.protocols = [p.code for p in addr.protocols()]
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return PeerInfo(peer_id, peer_data)
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class InvalidAddrError(ValueError):
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pass
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