mirror of
https://github.com/Chia-Network/chia-blockchain.git
synced 2024-11-11 01:28:17 +03:00
81 lines
2.5 KiB
Python
81 lines
2.5 KiB
Python
from __future__ import annotations
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import random
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import time
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from dataclasses import dataclass
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from typing import List, Optional, Set
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from chia.types.peer_info import PeerInfo
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from chia.util.ints import uint16, uint64
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@dataclass(frozen=False)
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class VettedPeer:
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host: str
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port: uint16
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# 0 means we have not attempted to vet this peer yet
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# a negative number means we have failed that many vetting attempts in a row
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# a positive number means we have successfully vetted the peer this many
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# times in a row
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vetted: int = 0
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# the timestamp of the last *successful* vetting of this peer
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vetted_timestamp: uint64 = uint64(0)
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# the last time we attempted to vet this peer, or 0 if we haven't tried yet
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# we set this regardless of whether the vetting is successful or not
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last_attempt: uint64 = uint64(0)
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time_added: uint64 = uint64(0)
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def __init__(self, h: str, p: uint16):
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self.host = h
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self.port = p
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def __eq__(self, rhs: object) -> bool:
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return self.host == rhs.host and self.port == rhs.port # type: ignore[no-any-return, attr-defined]
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def __hash__(self) -> int:
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return hash((self.host, self.port))
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class IntroducerPeers:
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"""
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Has the list of known full node peers that are already connected or may be
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connected to, and the time that they were last added.
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"""
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def __init__(self) -> None:
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self._peers: Set[VettedPeer] = set()
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def add(self, peer: Optional[PeerInfo]) -> bool:
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if peer is None or not peer.port:
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return False
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p = VettedPeer(peer.host, peer.port)
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p.time_added = uint64(int(time.time()))
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if p in self._peers:
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return True
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self._peers.add(p)
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return True
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def remove(self, peer: Optional[VettedPeer]) -> bool:
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if peer is None or not peer.port:
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return False
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try:
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self._peers.remove(peer)
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return True
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except ValueError:
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return False
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def get_peers(
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self, max_peers: int = 0, randomize: bool = False, recent_threshold: float = 9999999
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) -> List[VettedPeer]:
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target_peers = [peer for peer in self._peers if time.time() - float(peer.time_added) < recent_threshold]
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if not max_peers or max_peers > len(target_peers):
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max_peers = len(target_peers)
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if randomize:
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return random.sample(target_peers, max_peers)
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else:
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return target_peers[:max_peers]
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