Remove kademlia module (#377)

* Remove kademlia and routing/kademlia

* cleanup

* Fix routed_host test

* lint mypy

* fix doc

* remove set_up_nodes_by_transport_and_disc_opt and fix typing

libp2p/routing/kademlia/kademlia_content_router.py

@@ -1,21 +0,0 @@
-from typing import Iterable
-
-from libp2p.peer.peerinfo import PeerInfo
-from libp2p.routing.interfaces import IContentRouting
-
-
-class KadmeliaContentRouter(IContentRouting):
-    def provide(self, cid: bytes, announce: bool = True) -> None:
-        """
-        Provide adds the given cid to the content routing system.
-
-        If announce is True, it also announces it, otherwise it is just
-        kept in the local accounting of which objects are being
-        provided.
-        """
-        # the DHT finds the closest peers to `key` using the `FIND_NODE` RPC
-        # then sends a `ADD_PROVIDER` RPC with its own `PeerInfo` to each of these peers.
-
-    def find_provider_iter(self, cid: bytes, count: int) -> Iterable[PeerInfo]:
-        """Search for peers who are able to provide a given key returns an
-        iterator of peer.PeerInfo."""

libp2p/routing/kademlia/kademlia_peer_router.py

@@ -1,43 +0,0 @@
-import json
-
-import multiaddr
-
-from libp2p.kademlia.network import KademliaServer
-from libp2p.peer.id import ID
-from libp2p.peer.peerinfo import PeerInfo
-from libp2p.routing.interfaces import IPeerRouting
-
-
-class KadmeliaPeerRouter(IPeerRouting):
-    server: KademliaServer
-
-    def __init__(self, dht_server: KademliaServer) -> None:
-        self.server = dht_server
-
-    async def find_peer(self, peer_id: ID) -> PeerInfo:
-        """
-        Find a specific peer.
-
-        :param peer_id: peer to search for
-        :return: PeerInfo of specified peer
-        """
-        # switching peer_id to xor_id used by kademlia as node_id
-        xor_id = peer_id.xor_id
-        # ignore type for kad
-        value = await self.server.get(xor_id)  # type: ignore
-        return (
-            peer_info_from_str(value) if value else None
-        )  # TODO: should raise error if None?
-
-
-def peer_info_to_str(peer_info: PeerInfo) -> str:
-    return json.dumps(
-        [peer_info.peer_id.to_string(), list(map(lambda a: str(a), peer_info.addrs))]
-    )
-
-
-def peer_info_from_str(string: str) -> PeerInfo:
-    peer_id, raw_addrs = json.loads(string)
-    return PeerInfo(
-        ID.from_base58(peer_id), list(map(lambda a: multiaddr.Multiaddr(a), raw_addrs))
-    )