51 lines
1.4 KiB
Python
51 lines
1.4 KiB
Python
from typing import List, Sequence
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import multiaddr
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from .id import ID
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class PeerInfo:
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peer_id: ID
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addrs: List[multiaddr.Multiaddr]
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def __init__(self, peer_id: ID, addrs: Sequence[multiaddr.Multiaddr]) -> None:
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self.peer_id = peer_id
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self.addrs = list(addrs)
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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 of 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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f"`parts`={parts} should at least have a protocol `P_P2P`"
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)
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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: str = p2p_part.value_for_protocol(multiaddr.protocols.P_P2P)
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peer_id: ID = ID.from_base58(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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return PeerInfo(peer_id, [addr])
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class InvalidAddrError(ValueError):
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pass
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