*: Update to libp2p v0.32.0

bin/node/browser-testing/Cargo.toml

@@ -8,7 +8,7 @@ license = "Apache-2.0"
 
 [dependencies]
 futures-timer = "3.0.2"
-libp2p = { version = "0.31.1", default-features = false }
+libp2p = { version = "0.32.0", default-features = false }
 jsonrpc-core = "15.0.0"
 serde = "1.0.106"
 serde_json = "1.0.48"

client/authority-discovery/Cargo.toml

@@ -23,7 +23,7 @@ derive_more = "0.99.2"
 either = "1.5.3"
 futures = "0.3.4"
 futures-timer = "3.0.1"
-libp2p = { version = "0.31.2", default-features = false, features = ["kad"] }
+libp2p = { version = "0.32.0", default-features = false, features = ["kad"] }
 log = "0.4.8"
 prometheus-endpoint = { package = "substrate-prometheus-endpoint", path = "../../utils/prometheus", version = "0.8.0"}
 prost = "0.6.1"

client/cli/Cargo.toml

@@ -19,7 +19,7 @@ regex = "1.4.2"
 tokio = { version = "0.2.21", features = [ "signal", "rt-core", "rt-threaded", "blocking" ] }
 futures = "0.3.4"
 fdlimit = "0.2.1"
-libp2p = "0.31.2"
+libp2p = "0.32.0"
 parity-scale-codec = "1.3.0"
 hex = "0.4.2"
 rand = "0.7.3"

client/network-gossip/Cargo.toml

@@ -17,7 +17,7 @@ targets = ["x86_64-unknown-linux-gnu"]
 [dependencies]
 futures = "0.3.4"
 futures-timer = "3.0.1"
-libp2p = { version = "0.31.2", default-features = false }
+libp2p = { version = "0.32.0", default-features = false }
 log = "0.4.8"
 lru = "0.6.1"
 sc-network = { version = "0.8.0", path = "../network" }

client/network/Cargo.toml

@@ -64,13 +64,13 @@ wasm-timer = "0.2"
 zeroize = "1.0.0"
 
 [dependencies.libp2p]
-version = "0.31.2"
+version = "0.32.0"
 default-features = false
-features = ["identify", "kad", "mdns-async-std", "mplex", "noise", "ping", "request-response", "tcp-async-std", "websocket", "yamux"]
+features = ["identify", "kad", "mdns", "mplex", "noise", "ping", "request-response", "tcp-async-std", "websocket", "yamux"]
 
 [dev-dependencies]
 assert_matches = "1.3"
-libp2p = { version = "0.31.2", default-features = false }
+libp2p = { version = "0.32.0", default-features = false }
 quickcheck = "0.9.0"
 rand = "0.7.2"
 sp-keyring = { version = "2.0.0", path = "../../primitives/keyring" }

client/network/src/discovery.rs

@@ -59,8 +59,6 @@ use libp2p::kad::handler::KademliaHandlerProto;
 use libp2p::kad::QueryId;
 use libp2p::kad::record::{self, store::{MemoryStore, RecordStore}};
 #[cfg(not(target_os = "unknown"))]
-use libp2p::swarm::toggle::Toggle;
-#[cfg(not(target_os = "unknown"))]
 use libp2p::mdns::{Mdns, MdnsEvent};
 use libp2p::multiaddr::Protocol;
 use log::{debug, info, trace, warn};
@@ -206,15 +204,9 @@ impl DiscoveryConfig {
 			discovery_only_if_under_num,
 			#[cfg(not(target_os = "unknown"))]
 			mdns: if enable_mdns {
-				match Mdns::new() {
-					Ok(mdns) => Some(mdns).into(),
-					Err(err) => {
-						warn!(target: "sub-libp2p", "Failed to initialize mDNS: {:?}", err);
-						None.into()
-					}
-				}
+				MdnsWrapper::Instantiating(Mdns::new().boxed())
 			} else {
-				None.into()
+				MdnsWrapper::Disabled
 			},
 			allow_non_globals_in_dht,
 			known_external_addresses: LruHashSet::new(
@@ -234,7 +226,7 @@ pub struct DiscoveryBehaviour {
 	kademlias: HashMap<ProtocolId, Kademlia<MemoryStore>>,
 	/// Discovers nodes on the local network.
 	#[cfg(not(target_os = "unknown"))]
-	mdns: Toggle<Mdns>,
+	mdns: MdnsWrapper,
 	/// Stream that fires when we need to perform the next random Kademlia query.
 	next_kad_random_query: Delay,
 	/// After `next_kad_random_query` triggers, the next one triggers after this duration.
@@ -785,6 +777,46 @@ fn protocol_name_from_protocol_id(id: &ProtocolId) -> Vec<u8> {
 	v
 }
 
+/// [`Mdns::new`] returns a future. Instead of forcing [`DiscoveryConfig::finish`] and all its
+/// callers to be async, lazily instantiate [`Mdns`].
+enum MdnsWrapper {
+	Instantiating(futures::future::BoxFuture<'static, std::io::Result<Mdns>>),
+	Ready(Mdns),
+	Disabled,
+}
+
+impl MdnsWrapper {
+	fn addresses_of_peer(&mut self, peer_id: &PeerId) -> Vec<Multiaddr> {
+		match self {
+			MdnsWrapper::Instantiating(_) => Vec::new(),
+			MdnsWrapper::Ready(mdns) => mdns.addresses_of_peer(peer_id),
+			MdnsWrapper::Disabled => Vec::new(),
+		}
+	}
+
+    fn poll(
+        &mut self,
+        cx: &mut Context<'_>,
+        params: &mut impl PollParameters,
+	) -> Poll<NetworkBehaviourAction<void::Void, MdnsEvent>> {
+		loop {
+			match self {
+				MdnsWrapper::Instantiating(fut) => {
+					*self = match futures::ready!(fut.as_mut().poll(cx)) {
+						Ok(mdns) => MdnsWrapper::Ready(mdns),
+						Err(err) => {
+							warn!(target: "sub-libp2p", "Failed to initialize mDNS: {:?}", err);
+							MdnsWrapper::Disabled
+						},
+					}
+				}
+				MdnsWrapper::Ready(mdns) => return mdns.poll(cx, params),
+				MdnsWrapper::Disabled => return Poll::Pending,
+			}
+		}
+	}
+}
+
 #[cfg(test)]
 mod tests {
 	use crate::config::ProtocolId;