*: Fix newly raised clippy warnings (#3106)

Fixed minor issues raised by clippy to improve correctness and readablitity.

core/src/identity/ecdsa.rs

@@ -209,7 +209,7 @@ impl PublicKey {
         }
 
         let key_len = bitstr_head[1].checked_sub(1)? as usize;
-        let key_buf = asn1_buf.get(4 + oids_len + 3..4 + oids_len + 3 + key_len as usize)?;
+        let key_buf = asn1_buf.get(4 + oids_len + 3..4 + oids_len + 3 + key_len)?;
         Some(key_buf)
     }
 }

examples/chat-tokio.rs

@@ -53,7 +53,7 @@ async fn main() -> Result<(), Box<dyn Error>> {
     // Create a random PeerId
     let id_keys = identity::Keypair::generate_ed25519();
     let peer_id = PeerId::from(id_keys.public());
-    println!("Local peer id: {:?}", peer_id);
+    println!("Local peer id: {peer_id:?}");
 
     // Create a tokio-based TCP transport use noise for authenticated
     // encryption and Mplex for multiplexing of substreams on a TCP stream.
@@ -119,7 +119,7 @@ async fn main() -> Result<(), Box<dyn Error>> {
     if let Some(to_dial) = std::env::args().nth(1) {
         let addr: Multiaddr = to_dial.parse()?;
         swarm.dial(addr)?;
-        println!("Dialed {:?}", to_dial);
+        println!("Dialed {to_dial:?}");
     }
 
     // Read full lines from stdin
@@ -138,7 +138,7 @@ async fn main() -> Result<(), Box<dyn Error>> {
             event = swarm.select_next_some() => {
                 match event {
                     SwarmEvent::NewListenAddr { address, .. } => {
-                        println!("Listening on {:?}", address);
+                        println!("Listening on {address:?}");
                     }
                     SwarmEvent::Behaviour(MyBehaviourEvent::Floodsub(FloodsubEvent::Message(message))) => {
                         println!(

examples/chat.rs

@@ -70,7 +70,7 @@ async fn main() -> Result<(), Box<dyn Error>> {
     // Create a random PeerId
     let local_key = identity::Keypair::generate_ed25519();
     let local_peer_id = PeerId::from(local_key.public());
-    println!("Local peer id: {:?}", local_peer_id);
+    println!("Local peer id: {local_peer_id:?}");
 
     // Set up an encrypted DNS-enabled TCP Transport over the Mplex and Yamux protocols
     let transport = libp2p::development_transport(local_key).await?;
@@ -122,7 +122,7 @@ async fn main() -> Result<(), Box<dyn Error>> {
     if let Some(to_dial) = std::env::args().nth(1) {
         let addr: Multiaddr = to_dial.parse()?;
         swarm.dial(addr)?;
-        println!("Dialed {:?}", to_dial)
+        println!("Dialed {to_dial:?}")
     }
 
     // Read full lines from stdin
@@ -140,7 +140,7 @@ async fn main() -> Result<(), Box<dyn Error>> {
                 .publish(floodsub_topic.clone(), line.expect("Stdin not to close").as_bytes()),
             event = swarm.select_next_some() => match event {
                 SwarmEvent::NewListenAddr { address, .. } => {
-                    println!("Listening on {:?}", address);
+                    println!("Listening on {address:?}");
                 }
                 SwarmEvent::Behaviour(OutEvent::Floodsub(
                     FloodsubEvent::Message(message)

examples/distributed-key-value-store.rs

@@ -114,7 +114,7 @@ async fn main() -> Result<(), Box<dyn Error>> {
         line = stdin.select_next_some() => handle_input_line(&mut swarm.behaviour_mut().kademlia, line.expect("Stdin not to close")),
         event = swarm.select_next_some() => match event {
             SwarmEvent::NewListenAddr { address, .. } => {
-                println!("Listening in {:?}", address);
+                println!("Listening in {address:?}");
             },
             SwarmEvent::Behaviour(MyBehaviourEvent::Mdns(MdnsEvent::Discovered(list))) => {
                 for (peer_id, multiaddr) in list {
@@ -133,7 +133,7 @@ async fn main() -> Result<(), Box<dyn Error>> {
                         }
                     }
                     QueryResult::GetProviders(Err(err)) => {
-                        eprintln!("Failed to get providers: {:?}", err);
+                        eprintln!("Failed to get providers: {err:?}");
                     }
                     QueryResult::GetRecord(Ok(ok)) => {
                         for PeerRecord {
@@ -149,7 +149,7 @@ async fn main() -> Result<(), Box<dyn Error>> {
                         }
                     }
                     QueryResult::GetRecord(Err(err)) => {
-                        eprintln!("Failed to get record: {:?}", err);
+                        eprintln!("Failed to get record: {err:?}");
                     }
                     QueryResult::PutRecord(Ok(PutRecordOk { key })) => {
                         println!(
@@ -158,7 +158,7 @@ async fn main() -> Result<(), Box<dyn Error>> {
                         );
                     }
                     QueryResult::PutRecord(Err(err)) => {
-                        eprintln!("Failed to put record: {:?}", err);
+                        eprintln!("Failed to put record: {err:?}");
                     }
                     QueryResult::StartProviding(Ok(AddProviderOk { key })) => {
                         println!(
@@ -167,7 +167,7 @@ async fn main() -> Result<(), Box<dyn Error>> {
                         );
                     }
                     QueryResult::StartProviding(Err(err)) => {
-                        eprintln!("Failed to put provider record: {:?}", err);
+                        eprintln!("Failed to put provider record: {err:?}");
                     }
                     _ => {}
                 }

examples/file-sharing.rs

@@ -149,7 +149,7 @@ async fn main() -> Result<(), Box<dyn Error>> {
             // Locate all nodes providing the file.
             let providers = network_client.get_providers(name.clone()).await;
             if providers.is_empty() {
-                return Err(format!("Could not find provider for file {}.", name).into());
+                return Err(format!("Could not find provider for file {name}.").into());
             }
 
             // Request the content of the file from each node.
@@ -506,8 +506,8 @@ mod network {
                     }
                 }
                 SwarmEvent::IncomingConnectionError { .. } => {}
-                SwarmEvent::Dialing(peer_id) => eprintln!("Dialing {}", peer_id),
-                e => panic!("{:?}", e),
+                SwarmEvent::Dialing(peer_id) => eprintln!("Dialing {peer_id}"),
+                e => panic!("{e:?}"),
             }
         }
 

examples/gossipsub-chat.rs

@@ -68,7 +68,7 @@ async fn main() -> Result<(), Box<dyn Error>> {
     // Create a random PeerId
     let local_key = identity::Keypair::generate_ed25519();
     let local_peer_id = PeerId::from(local_key.public());
-    println!("Local peer id: {}", local_peer_id);
+    println!("Local peer id: {local_peer_id}");
 
     // Set up an encrypted DNS-enabled TCP Transport over the Mplex protocol.
     let transport = libp2p::development_transport(local_key.clone()).await?;
@@ -127,19 +127,19 @@ async fn main() -> Result<(), Box<dyn Error>> {
                 if let Err(e) = swarm
                     .behaviour_mut().gossipsub
                     .publish(topic.clone(), line.expect("Stdin not to close").as_bytes()) {
-                    println!("Publish error: {:?}", e);
+                    println!("Publish error: {e:?}");
                 }
             },
             event = swarm.select_next_some() => match event {
                 SwarmEvent::Behaviour(MyBehaviourEvent::Mdns(MdnsEvent::Discovered(list))) => {
                     for (peer_id, _multiaddr) in list {
-                        println!("mDNS discovered a new peer: {}", peer_id);
+                        println!("mDNS discovered a new peer: {peer_id}");
                         swarm.behaviour_mut().gossipsub.add_explicit_peer(&peer_id);
                     }
                 },
                 SwarmEvent::Behaviour(MyBehaviourEvent::Mdns(MdnsEvent::Expired(list))) => {
                     for (peer_id, _multiaddr) in list {
-                        println!("mDNS discover peer has expired: {}", peer_id);
+                        println!("mDNS discover peer has expired: {peer_id}");
                         swarm.behaviour_mut().gossipsub.remove_explicit_peer(&peer_id);
                     }
                 },

examples/ipfs-kad.rs

@@ -78,7 +78,7 @@ async fn main() -> Result<(), Box<dyn Error>> {
         identity::Keypair::generate_ed25519().public().into()
     };
 
-    println!("Searching for the closest peers to {:?}", to_search);
+    println!("Searching for the closest peers to {to_search:?}");
     swarm.behaviour_mut().get_closest_peers(to_search);
 
     // Kick it off!
@@ -102,7 +102,7 @@ async fn main() -> Result<(), Box<dyn Error>> {
                     }
                     Err(GetClosestPeersError::Timeout { peers, .. }) => {
                         if !peers.is_empty() {
-                            println!("Query timed out with closest peers: {:#?}", peers)
+                            println!("Query timed out with closest peers: {peers:#?}")
                         } else {
                             // The example is considered failed as there
                             // should always be at least 1 reachable peer.

examples/ipfs-private.rs

@@ -131,7 +131,7 @@ async fn main() -> Result<(), Box<dyn Error>> {
     env_logger::init();
 
     let ipfs_path = get_ipfs_path();
-    println!("using IPFS_PATH {:?}", ipfs_path);
+    println!("using IPFS_PATH {ipfs_path:?}");
     let psk: Option<PreSharedKey> = get_psk(&ipfs_path)?
         .map(|text| PreSharedKey::from_str(&text))
         .transpose()?;
@@ -139,7 +139,7 @@ async fn main() -> Result<(), Box<dyn Error>> {
     // Create a random PeerId
     let local_key = identity::Keypair::generate_ed25519();
     let local_peer_id = PeerId::from(local_key.public());
-    println!("using random peer id: {:?}", local_peer_id);
+    println!("using random peer id: {local_peer_id:?}");
     if let Some(psk) = psk {
         println!("using swarm key with fingerprint: {}", psk.fingerprint());
     }
@@ -202,7 +202,7 @@ async fn main() -> Result<(), Box<dyn Error>> {
             ping: ping::Behaviour::new(ping::Config::new()),
         };
 
-        println!("Subscribing to {:?}", gossipsub_topic);
+        println!("Subscribing to {gossipsub_topic:?}");
         behaviour.gossipsub.subscribe(&gossipsub_topic).unwrap();
         Swarm::new(transport, behaviour, local_peer_id)
     };
@@ -211,7 +211,7 @@ async fn main() -> Result<(), Box<dyn Error>> {
     for to_dial in std::env::args().skip(1) {
         let addr: Multiaddr = parse_legacy_multiaddr(&to_dial)?;
         swarm.dial(addr)?;
-        println!("Dialed {:?}", to_dial)
+        println!("Dialed {to_dial:?}")
     }
 
     // Read full lines from stdin
@@ -229,16 +229,16 @@ async fn main() -> Result<(), Box<dyn Error>> {
                     .gossipsub
                     .publish(gossipsub_topic.clone(), line.expect("Stdin not to close").as_bytes())
                 {
-                    println!("Publish error: {:?}", e);
+                    println!("Publish error: {e:?}");
                 }
             },
             event = swarm.select_next_some() => {
                 match event {
                     SwarmEvent::NewListenAddr { address, .. } => {
-                        println!("Listening on {:?}", address);
+                        println!("Listening on {address:?}");
                     }
                     SwarmEvent::Behaviour(MyBehaviourEvent::Identify(event)) => {
-                        println!("identify: {:?}", event);
+                        println!("identify: {event:?}");
                     }
                     SwarmEvent::Behaviour(MyBehaviourEvent::Gossipsub(GossipsubEvent::Message {
                         propagation_source: peer_id,
@@ -286,7 +286,7 @@ async fn main() -> Result<(), Box<dyn Error>> {
                                 peer,
                                 result: Result::Err(ping::Failure::Other { error }),
                             } => {
-                                println!("ping: ping::Failure with {}: {}", peer.to_base58(), error);
+                                println!("ping: ping::Failure with {}: {error}", peer.to_base58());
                             }
                         }
                     }

examples/mdns-passive-discovery.rs

@@ -34,7 +34,7 @@ async fn main() -> Result<(), Box<dyn Error>> {
     // Create a random PeerId.
     let id_keys = identity::Keypair::generate_ed25519();
     let peer_id = PeerId::from(id_keys.public());
-    println!("Local peer id: {:?}", peer_id);
+    println!("Local peer id: {peer_id:?}");
 
     // Create a transport.
     let transport = libp2p::development_transport(id_keys).await?;
@@ -52,12 +52,12 @@ async fn main() -> Result<(), Box<dyn Error>> {
         match swarm.select_next_some().await {
             SwarmEvent::Behaviour(MdnsEvent::Discovered(peers)) => {
                 for (peer, addr) in peers {
-                    println!("discovered {} {}", peer, addr);
+                    println!("discovered {peer} {addr}");
                 }
             }
             SwarmEvent::Behaviour(MdnsEvent::Expired(expired)) => {
                 for (peer, addr) in expired {
-                    println!("expired {} {}", peer, addr);
+                    println!("expired {peer} {addr}");
                 }
             }
             _ => {}

examples/ping.rs

@@ -50,7 +50,7 @@ use std::error::Error;
 async fn main() -> Result<(), Box<dyn Error>> {
     let local_key = identity::Keypair::generate_ed25519();
     let local_peer_id = PeerId::from(local_key.public());
-    println!("Local peer id: {:?}", local_peer_id);
+    println!("Local peer id: {local_peer_id:?}");
 
     let transport = libp2p::development_transport(local_key).await?;
 
@@ -65,13 +65,13 @@ async fn main() -> Result<(), Box<dyn Error>> {
     if let Some(addr) = std::env::args().nth(1) {
         let remote: Multiaddr = addr.parse()?;
         swarm.dial(remote)?;
-        println!("Dialed {}", addr)
+        println!("Dialed {addr}")
     }
 
     loop {
         match swarm.select_next_some().await {
-            SwarmEvent::NewListenAddr { address, .. } => println!("Listening on {:?}", address),
-            SwarmEvent::Behaviour(event) => println!("{:?}", event),
+            SwarmEvent::NewListenAddr { address, .. } => println!("Listening on {address:?}"),
+            SwarmEvent::Behaviour(event) => println!("{event:?}"),
             _ => {}
         }
     }

muxers/mplex/src/codec.rs

@@ -226,7 +226,7 @@ impl Decoder for Codec {
                     }
 
                     let buf = src.split_to(len);
-                    let num = (header >> 3) as u64;
+                    let num = header >> 3;
                     let out = match header & 7 {
                         0 => Frame::Open {
                             stream_id: RemoteStreamId::dialer(num),

protocols/gossipsub/src/behaviour.rs

@@ -1265,9 +1265,9 @@ where
             // Ask in random order
             let mut iwant_ids_vec: Vec<_> = iwant_ids.into_iter().collect();
             let mut rng = thread_rng();
-            iwant_ids_vec.partial_shuffle(&mut rng, iask as usize);
+            iwant_ids_vec.partial_shuffle(&mut rng, iask);
 
-            iwant_ids_vec.truncate(iask as usize);
+            iwant_ids_vec.truncate(iask);
             *iasked += iask;
 
             for message_id in &iwant_ids_vec {

protocols/gossipsub/src/peer_score.rs

@@ -253,7 +253,7 @@ impl PeerScore {
 
                 // P2: first message deliveries
                 let p2 = {
-                    let v = topic_stats.first_message_deliveries as f64;
+                    let v = topic_stats.first_message_deliveries;
                     if v < topic_params.first_message_deliveries_cap {
                         v
                     } else {

protocols/gossipsub/src/peer_score/tests.rs

@@ -890,7 +890,7 @@ fn test_score_ip_colocation() {
     let n_shared = 3.0;
     let ip_surplus = n_shared - ip_colocation_factor_threshold;
     let penalty = ip_surplus * ip_surplus;
-    let expected = ip_colocation_factor_weight * penalty as f64;
+    let expected = ip_colocation_factor_weight * penalty;
 
     assert_eq!(score_b, expected, "Peer B should have expected score");
     assert_eq!(score_c, expected, "Peer C should have expected score");

protocols/gossipsub/src/subscription_filter.rs

@@ -50,7 +50,7 @@ pub trait TopicSubscriptionFilter {
             }
         }
         self.filter_incoming_subscription_set(
-            filtered_subscriptions.into_iter().map(|(_, v)| v).collect(),
+            filtered_subscriptions.into_values().collect(),
             currently_subscribed_topics,
         )
     }

protocols/kad/src/kbucket/key.rs

@@ -94,14 +94,14 @@ impl<T> From<Key<T>> for KeyBytes {
 
 impl From<Multihash> for Key<Multihash> {
     fn from(m: Multihash) -> Self {
-        let bytes = KeyBytes(Sha256::digest(&m.to_bytes()));
+        let bytes = KeyBytes(Sha256::digest(m.to_bytes()));
         Key { preimage: m, bytes }
     }
 }
 
 impl From<PeerId> for Key<PeerId> {
     fn from(p: PeerId) -> Self {
-        let bytes = KeyBytes(Sha256::digest(&p.to_bytes()));
+        let bytes = KeyBytes(Sha256::digest(p.to_bytes()));
         Key { preimage: p, bytes }
     }
 }

protocols/kad/src/query/peers/closest/disjoint.rs

@@ -732,9 +732,7 @@ mod tests {
 
     impl std::fmt::Debug for Graph {
         fn fmt(&self, fmt: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-            fmt.debug_list()
-                .entries(self.0.iter().map(|(id, _)| id))
-                .finish()
+            fmt.debug_list().entries(self.0.keys()).finish()
         }
     }
 
@@ -796,8 +794,8 @@ mod tests {
         fn get_closest_peer(&self, target: &KeyBytes) -> PeerId {
             *self
                 .0
-                .iter()
-                .map(|(peer_id, _)| (target.distance(&Key::from(*peer_id)), peer_id))
+                .keys()
+                .map(|peer_id| (target.distance(&Key::from(*peer_id)), peer_id))
                 .fold(None, |acc, (distance_b, peer_id_b)| match acc {
                     None => Some((distance_b, peer_id_b)),
                     Some((distance_a, peer_id_a)) => {

protocols/relay/src/v2/relay.rs

@@ -298,8 +298,8 @@ impl NetworkBehaviour for Relay {
                     // Deny if it exceeds `max_reservations`.
                     || self
                         .reservations
-                        .iter()
-                        .map(|(_, cs)| cs.len())
+                        .values()
+                        .map(|cs| cs.len())
                         .sum::<usize>()
                         >= self.config.max_reservations
                     // Deny if it exceeds the allowed rate of reservations.

protocols/rendezvous/src/client.rs

@@ -310,7 +310,7 @@ fn handle_outbound_event(
             expiring_registrations.extend(registrations.iter().cloned().map(|registration| {
                 async move {
                     // if the timer errors we consider it expired
-                    futures_timer::Delay::new(Duration::from_secs(registration.ttl as u64)).await;
+                    futures_timer::Delay::new(Duration::from_secs(registration.ttl)).await;
 
                     (registration.record.peer_id(), registration.namespace)
                 }

protocols/rendezvous/src/server.rs

@@ -381,7 +381,7 @@ impl Registrations {
         self.registrations
             .insert(registration_id, registration.clone());
 
-        let next_expiry = futures_timer::Delay::new(Duration::from_secs(ttl as u64))
+        let next_expiry = futures_timer::Delay::new(Duration::from_secs(ttl))
             .map(move |_| registration_id)
             .boxed();