chore: update libp2p to 0.52.1 (#14429)

* update libp2p to 0.52.0

* proto name now must implement `AsRef<str>`

* update libp2p version everywhere

* ToSwarm, FromBehaviour, ToBehaviour

also LocalProtocolsChange and RemoteProtocolsChange

* new NetworkBehaviour invariants

* replace `Vec<u8>` with `StreamProtocol`

* rename ConnectionHandlerEvent::Custom to NotifyBehaviour

* remove DialError & ListenError invariants

also fix pending_events

* use connection_limits::Behaviour

See https://github.com/libp2p/rust-libp2p/pull/3885

* impl `void::Void` for `BehaviourOut`

also use `Behaviour::with_codec`

* KademliaHandler no longer public

* fix StreamProtocol construction

* update libp2p-identify to 0.2.0

* remove non-existing methods from PollParameters

rename ConnectionHandlerUpgrErr to StreamUpgradeError

* `P2p` now contains `PeerId`, not `Multihash`

* use multihash-codetable crate

* update Cargo.lock

* reformat text

* comment out tests for now

* remove `.into()` from P2p

* confirm observed addr manually

See https://github.com/libp2p/rust-libp2p/blob/master/protocols/identify/CHANGELOG.md#0430

* remove SwarmEvent::Banned

since we're not using `ban_peer_id`, this can be safely removed.
we may want to introduce `libp2p::allow_block_list` module in the future.

* fix imports

* replace `libp2p` with smaller deps in network-gossip

* bring back tests

* finish rewriting tests

* uncomment handler tests

* Revert "uncomment handler tests"

This reverts commit 720a06815887f4e10767c62b58864a7ec3a48e50.

* add a fixme

* update Cargo.lock

* remove extra From

* make void uninhabited

* fix discovery test

* use autonat protocols

confirming external addresses manually is unsafe in open networks

* fix SyncNotificationsClogged invariant

* only set server mode manually in tests

doubt that we need to set it on node since we're adding public addresses

* address @dmitry-markin comments

* remove autonat

* removed unused var

* fix EOL

* update smallvec and sha2

in attempt to compile polkadot

* bump k256

in attempt to build cumulus

---------

Co-authored-by: parity-processbot <>

substrate/client/network/src/behaviour.rs

@@ -30,8 +30,8 @@ use crate::{
 use bytes::Bytes;
 use futures::channel::oneshot;
 use libp2p::{
-	core::Multiaddr, identify::Info as IdentifyInfo, identity::PublicKey, kad::RecordKey,
-	swarm::NetworkBehaviour, PeerId,
+	connection_limits::ConnectionLimits, core::Multiaddr, identify::Info as IdentifyInfo,
+	identity::PublicKey, kad::RecordKey, swarm::NetworkBehaviour, PeerId,
 };
 
 use sc_network_common::role::{ObservedRole, Roles};
@@ -42,7 +42,7 @@ pub use crate::request_responses::{InboundFailure, OutboundFailure, RequestId, R
 
 /// General behaviour of the network. Combines all protocols together.
 #[derive(NetworkBehaviour)]
-#[behaviour(out_event = "BehaviourOut")]
+#[behaviour(to_swarm = "BehaviourOut")]
 pub struct Behaviour<B: BlockT> {
 	/// All the substrate-specific protocols.
 	substrate: Protocol<B>,
@@ -51,6 +51,8 @@ pub struct Behaviour<B: BlockT> {
 	peer_info: peer_info::PeerInfoBehaviour,
 	/// Discovers nodes of the network.
 	discovery: DiscoveryBehaviour,
+	/// Connection limits.
+	connection_limits: libp2p::connection_limits::Behaviour,
 	/// Generic request-response protocols.
 	request_responses: request_responses::RequestResponsesBehaviour,
 }
@@ -171,11 +173,13 @@ impl<B: BlockT> Behaviour<B> {
 		disco_config: DiscoveryConfig,
 		request_response_protocols: Vec<ProtocolConfig>,
 		peerset: PeersetHandle,
+		connection_limits: ConnectionLimits,
 	) -> Result<Self, request_responses::RegisterError> {
 		Ok(Self {
 			substrate,
 			peer_info: peer_info::PeerInfoBehaviour::new(user_agent, local_public_key),
 			discovery: disco_config.finish(),
+			connection_limits: libp2p::connection_limits::Behaviour::new(connection_limits),
 			request_responses: request_responses::RequestResponsesBehaviour::new(
 				request_response_protocols.into_iter(),
 				peerset,
@@ -247,7 +251,7 @@ impl<B: BlockT> Behaviour<B> {
 	pub fn add_self_reported_address_to_dht(
 		&mut self,
 		peer_id: &PeerId,
-		supported_protocols: &[impl AsRef<[u8]>],
+		supported_protocols: &[impl AsRef<str>],
 		addr: Multiaddr,
 	) {
 		self.discovery.add_self_reported_address(peer_id, supported_protocols, addr);
@@ -351,3 +355,9 @@ impl From<DiscoveryOut> for BehaviourOut {
 		}
 	}
 }
+
+impl From<void::Void> for BehaviourOut {
+	fn from(e: void::Void) -> Self {
+		void::unreachable(e)
+	}
+}