py-libp2p/libp2p/peer/peerstore.py
2019-07-30 16:24:51 +08:00

103 lines
3.2 KiB
Python

from typing import (
Any,
Dict,
List,
Optional,
Sequence,
)
from multiaddr import Multiaddr
from .id import ID
from .peerstore_interface import IPeerStore
from .peerdata import PeerData
from .peerinfo import PeerInfo
class PeerStore(IPeerStore):
peer_map: Dict[ID, PeerData]
def __init__(self) -> None:
IPeerStore.__init__(self)
self.peer_map = {}
def __create_or_get_peer(self, peer_id: ID) -> PeerData:
"""
Returns the peer data for peer_id or creates a new
peer data (and stores it in peer_map) if peer
data for peer_id does not yet exist
:param peer_id: peer ID
:return: peer data
"""
if peer_id in self.peer_map:
return self.peer_map[peer_id]
data = PeerData()
self.peer_map[peer_id] = data
return self.peer_map[peer_id]
def peer_info(self, peer_id: ID) -> Optional[PeerInfo]:
if peer_id in self.peer_map:
peer_data = self.peer_map[peer_id]
return PeerInfo(peer_id, peer_data)
return None
def get_protocols(self, peer_id: ID) -> List[str]:
if peer_id in self.peer_map:
return self.peer_map[peer_id].get_protocols()
raise PeerStoreError("peer ID not found")
def add_protocols(self, peer_id: ID, protocols: Sequence[str]) -> None:
peer = self.__create_or_get_peer(peer_id)
peer.add_protocols(list(protocols))
def set_protocols(self, peer_id: ID, protocols: Sequence[str]) -> None:
peer = self.__create_or_get_peer(peer_id)
peer.set_protocols(list(protocols))
def peer_ids(self) -> List[ID]:
return list(self.peer_map.keys())
def get(self, peer_id: ID, key: Any) -> Any:
if peer_id in self.peer_map:
val = self.peer_map[peer_id].get_metadata(key)
return val
raise PeerStoreError("peer ID not found")
def put(self, peer_id: ID, key: Any, val: Any) -> None:
# <<?>>
# This can output an error, not sure what the possible errors are
peer = self.__create_or_get_peer(peer_id)
peer.put_metadata(key, val)
def add_addr(self, peer_id: ID, addr: Multiaddr, ttl: int) -> None:
self.add_addrs(peer_id, [addr], ttl)
def add_addrs(self, peer_id: ID, addrs: Sequence[Multiaddr], ttl: int) -> None:
# Ignore ttl for now
peer = self.__create_or_get_peer(peer_id)
peer.add_addrs(list(addrs))
def addrs(self, peer_id: ID) -> List[Multiaddr]:
if peer_id in self.peer_map:
return self.peer_map[peer_id].get_addrs()
raise PeerStoreError("peer ID not found")
def clear_addrs(self, peer_id: ID) -> None:
# Only clear addresses if the peer is in peer map
if peer_id in self.peer_map:
self.peer_map[peer_id].clear_addrs()
def peers_with_addrs(self) -> List[ID]:
# Add all peers with addrs at least 1 to output
output: List[ID] = []
for peer_id in self.peer_map:
if len(self.peer_map[peer_id].get_addrs()) >= 1:
output.append(peer_id)
return output
class PeerStoreError(KeyError):
"""Raised when peer ID is not found in peer store"""