transport: Fix clippy

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

src/transport/common/listener.rs

@@ -430,10 +430,8 @@ fn multiaddr_to_socket_address(
     }
 
     let maybe_peer = match iter.next() {
-        Some(Protocol::P2p(multihash)) => Some(
-            PeerId::from_multihash(multihash)
-                .map_err(|hash| AddressError::InvalidMultihash(hash))?,
-        ),
+        Some(Protocol::P2p(multihash)) =>
+            Some(PeerId::from_multihash(multihash).map_err(AddressError::InvalidMultihash)?),
         None => None,
         protocol => {
             tracing::error!(

src/transport/manager/mod.rs

@@ -1724,7 +1724,7 @@ impl TransportManager {
                                         "open failure, but not the last transport",
                                     );
 
-                                    self.opening_errors.entry(connection_id).or_insert(Default::default()).extend(errors);
+                                    self.opening_errors.entry(connection_id).or_default().extend(errors);
                                 }
                             }
                         },

src/transport/quic/connection.rs

@@ -145,7 +145,7 @@ impl QuicConnection {
             Role::Dialer => dialer_select_proto(stream, protocols, Version::V1).await,
             Role::Listener => listener_select_proto(stream, protocols).await,
         }
-        .map_err(|error| NegotiationError::MultistreamSelectError(error))?;
+        .map_err(NegotiationError::MultistreamSelectError)?;
 
         tracing::trace!(target: LOG_TARGET, ?protocol, "protocol negotiated");
 

src/transport/quic/mod.rs

@@ -356,7 +356,7 @@ impl Transport for QuicTransport {
 
                 let future = async move {
                     let (socket_address, peer) = QuicListener::get_socket_address(&address)
-                        .map_err(|err| DialError::AddressError(err))?;
+                        .map_err(DialError::AddressError)?;
                     let peer =
                         peer.ok_or_else(|| DialError::AddressError(AddressError::PeerIdMissing))?;
 

src/transport/tcp/mod.rs

@@ -569,7 +569,7 @@ impl Stream for TcpTransport {
                         return Poll::Ready(Some(TransportEvent::DialFailure {
                             connection_id,
                             address,
-                            error: error.into(),
+                            error,
                         }));
                     }
                 }