py-libp2p/libp2p/host/host_interface.py
2019-08-04 12:37:41 +08:00

71 lines
2.2 KiB
Python

from abc import ABC, abstractmethod
from typing import Any, Awaitable, Callable, List, Sequence
import multiaddr
from libp2p.network.network_interface import INetwork
from libp2p.network.stream.net_stream_interface import INetStream
from libp2p.peer.id import ID
from libp2p.peer.peerinfo import PeerInfo
StreamHandlerFn = Callable[[INetStream], Awaitable[None]]
class IHost(ABC):
@abstractmethod
def get_id(self) -> ID:
"""
:return: peer_id of host
"""
@abstractmethod
def get_network(self) -> INetwork:
"""
:return: network instance of host
"""
# FIXME: Replace with correct return type
@abstractmethod
def get_mux(self) -> Any:
"""
:return: mux instance of host
"""
@abstractmethod
def get_addrs(self) -> List[multiaddr.Multiaddr]:
"""
:return: all the multiaddr addresses this host is listening too
"""
@abstractmethod
def set_stream_handler(self, protocol_id: str, stream_handler: StreamHandlerFn) -> bool:
"""
set stream handler for host
:param protocol_id: protocol id used on stream
:param stream_handler: a stream handler function
:return: true if successful
"""
# protocol_id can be a list of protocol_ids
# stream will decide which protocol_id to run on
@abstractmethod
async def new_stream(self, peer_id: ID, protocol_ids: Sequence[str]) -> INetStream:
"""
:param peer_id: peer_id that host is connecting
:param protocol_ids: protocol ids that stream can run on
:return: stream: new stream created
"""
@abstractmethod
async def connect(self, peer_info: PeerInfo) -> None:
"""
connect ensures there is a connection between this host and the peer with
given peer_info.peer_id. connect will absorb the addresses in peer_info into its internal
peerstore. If there is not an active connection, connect will issue a
dial, and block until a connection is open, or an error is
returned.
:param peer_info: peer_info of the host we want to connect to
:type peer_info: peer.peerinfo.PeerInfo
"""