fix: issues pointed out in review comments

examples/stress.rs

@@ -457,13 +457,13 @@ impl Network {
             },
         };
         let bytes = bincode::serialize(&message)?.into();
-        let itry = Itinerary {
+        let itinerary = Itinerary {
             src: SrcLocation::Node(src),
             dst: DstLocation::Section(dst),
             aggregation: Aggregation::None,
         };
 
-        match node.send_message(itry, bytes).await {
+        match node.send_message(itinerary, bytes).await {
             Ok(()) => Ok(true),
             Err(RoutingError::InvalidSrcLocation) => Ok(false), // node name changed
             Err(error) => Err(error.into()),

src/messages/mod.rs

@@ -40,7 +40,7 @@ pub(crate) struct Message {
     src: SrcAuthority,
     /// Destination location.
     dst: DstLocation,
-    ///
+    /// The aggregation scheme to be used.
     aggregation: Aggregation,
     /// The body of the message.
     variant: Variant,
@@ -311,15 +311,13 @@ impl Message {
     }
 
     /// Elders will aggregate a group sig before
-    /// they all all send one copy of it each to dst.
-    pub fn aggregate_at_src(&self) -> bool {
-        matches!(self.src, SrcAuthority::Section { .. })
-    }
-
-    /// Elders will send their signed message, which
-    /// recipients aggregate.
-    pub fn aggregate_at_dst(&self) -> bool {
-        matches!(self.src, SrcAuthority::BlsShare { .. })
+    /// they all send one copy of it each to dst.
+    pub fn aggregation(&self) -> Aggregation {
+        match self.src {
+            SrcAuthority::Section { .. } => Aggregation::AtSource,
+            SrcAuthority::BlsShare { .. } => Aggregation::AtDestination,
+            SrcAuthority::Node { .. } => Aggregation::None,
+        }
     }
 
     /// Returns the attached proof chain, if any.

src/routing/approved.rs

@@ -49,7 +49,7 @@ use sn_messaging::{
     section_info::{
         Error as TargetSectionError, GetSectionResponse, Message as SectionInfoMsg, SectionInfo,
     },
-    DstLocation, EndUser, Itinerary, MessageType, SrcLocation,
+    Aggregation, DstLocation, EndUser, Itinerary, MessageType, SrcLocation,
 };
 use std::{cmp, net::SocketAddr, slice};
 use tokio::sync::mpsc;
@@ -820,7 +820,7 @@ impl Approved {
         };
 
         let bounce_dst_key = *self.section_key_by_name(&src_name);
-        let bounce_dst = if msg.aggregate_at_src() {
+        let bounce_dst = if matches!(msg.aggregation(), Aggregation::AtSource) {
             DstLocation::Section(src_name)
         } else {
             DstLocation::Node(src_name)
@@ -1002,46 +1002,39 @@ impl Approved {
                 message: MessageType::ClientMessage(ClientMessage::from(content)?),
             }]);
         }
-        if msg.aggregate_at_dst() {
-            if !matches!(dst, DstLocation::Node(_)) {
-                return Err(Error::InvalidDstLocation);
-            }
-            if let SrcAuthority::BlsShare {
-                proof_share,
-                src_section,
-                ..
-            } = &src
+        if let SrcAuthority::BlsShare {
+            proof_share,
+            src_section,
+            ..
+        } = &src
+        {
+            let signed_bytes = bincode::serialize(&msg.signable_view())?;
+            match self
+                .message_accumulator
+                .add(&signed_bytes, proof_share.clone())
             {
-                let signed_bytes = bincode::serialize(&msg.signable_view())?;
-                match self
-                    .message_accumulator
-                    .add(&signed_bytes, proof_share.clone())
-                {
-                    Ok(proof) => {
-                        trace!("Successfully aggregated signatures for message: {:?}", msg);
-                        let key = msg.proof_chain_last_key()?;
-                        if key.verify(&proof.signature, signed_bytes) {
-                            self.send_event(Event::MessageReceived {
-                                content,
-                                src: SrcLocation::Section(*src_section),
-                                dst,
-                            });
-                        } else {
-                            trace!(
-                                "Aggregated signature is invalid. Handling message {:?} skipped",
-                                msg
-                            );
-                        }
-                    }
-                    Err(AggregatorError::NotEnoughShares) => {}
-                    Err(err) => {
-                        trace!("Error accumulating message at destination: {:?}", err);
+                Ok(proof) => {
+                    trace!("Successfully aggregated signatures for message: {:?}", msg);
+                    let key = msg.proof_chain_last_key()?;
+                    if key.verify(&proof.signature, signed_bytes) {
+                        self.send_event(Event::MessageReceived {
+                            content,
+                            src: SrcLocation::Section(*src_section),
+                            dst,
+                        });
+                    } else {
+                        trace!(
+                            "Aggregated signature is invalid. Handling message {:?} skipped",
+                            msg
+                        );
                     }
                 }
-                return Ok(vec![]);
-            } else {
-                return Err(Error::InvalidSrcLocation);
+                Err(AggregatorError::NotEnoughShares) => {}
+                Err(err) => {
+                    trace!("Error accumulating message at destination: {:?}", err);
+                }
             }
+            return Ok(vec![]);
         }
 
         self.send_event(Event::MessageReceived {
@@ -2036,53 +2029,60 @@ impl Approved {
         Ok(commands)
     }
 
-    pub fn send_user_message(&mut self, itry: Itinerary, content: Bytes) -> Result<Vec<Command>> {
-        let are_we_src =
-            matches!(itry.src, SrcLocation::Node(_)) && itry.src.name() == self.node.name();
+    pub fn send_user_message(
+        &mut self,
+        itinerary: Itinerary,
+        content: Bytes,
+    ) -> Result<Vec<Command>> {
+        let are_we_src = itinerary.src.equals(&self.node.name())
+            || itinerary.src.equals(&self.section().prefix().name());
         if !are_we_src {
             error!(
                 "Not sending user message {:?} -> {:?}: we are not the source location",
-                itry.src, itry.dst
+                itinerary.src, itinerary.dst
             );
             return Err(Error::InvalidSrcLocation);
         }
-        if matches!(itry.src, SrcLocation::EndUser(_)) {
+        if matches!(itinerary.src, SrcLocation::EndUser(_)) {
             return Err(Error::InvalidSrcLocation);
         }
-        if matches!(itry.dst, DstLocation::Direct) {
+        if matches!(itinerary.dst, DstLocation::Direct) {
             error!(
                 "Not sending user message {:?} -> {:?}: direct dst not supported",
-                itry.src, itry.dst
+                itinerary.src, itinerary.dst
             );
             return Err(Error::InvalidDstLocation);
         }
 
-        // If the source is a single node, we don't even need to vote, so let's cut this short.
-        let msg = if itry.aggregate_at_dst() {
+        // If the msg is to be aggregated at dst, we don't vote among our peers, wemsimply send the msg as our vote to the dst.
+        let msg = if itinerary.aggregate_at_dst() {
             Message::for_dst_accumulation(
                 &self.node,
                 self.section_keys_provider.key_share()?,
-                itry.dst,
+                itinerary.dst,
                 content,
                 self.section().create_proof_chain_for_our_info(None),
                 None,
                 self.section().prefix().name(),
             )?
-        } else if itry.aggregate_at_src() {
+        } else if itinerary.aggregate_at_src() {
             let variant = Variant::UserMessage(content);
-            let vote = self.create_send_message_vote(itry.dst, variant, None)?;
+            let vote = self.create_send_message_vote(itinerary.dst, variant, None)?;
             let recipients = delivery_group::signature_targets(
-                &itry.dst,
+                &itinerary.dst,
                 self.section.elders_info().peers().copied(),
             );
             return self.send_vote(&recipients, vote);
         } else {
             let variant = Variant::UserMessage(content);
-            Message::single_src(&self.node, itry.dst, variant, None, None)?
+            Message::single_src(&self.node, itinerary.dst, variant, None, None)?
         };
         let mut commands = vec![];
 
-        if itry.dst.contains(&self.node.name(), self.section.prefix()) {
+        if itinerary
+            .dst
+            .contains(&self.node.name(), self.section.prefix())
+        {
             commands.push(Command::HandleMessage {
                 sender: Some(self.node.addr),
                 message: msg.clone(),

src/routing/command.rs

@@ -70,7 +70,10 @@ pub(crate) enum Command {
         message: MessageType,
     },
     /// Send `UserMessage` with the given source and destination.
-    SendUserMessage { itry: Itinerary, content: Bytes },
+    SendUserMessage {
+        itinerary: Itinerary,
+        content: Bytes,
+    },
     /// Schedule a timeout after the given duration. When the timeout expires, a `HandleTimeout`
     /// command is raised. The token is used to identify the timeout.
     ScheduleTimeout { duration: Duration, token: u64 },
@@ -162,9 +165,9 @@ impl Debug for Command {
                 .field("delivery_group_size", delivery_group_size)
                 .field("message", message)
                 .finish(),
-            Self::SendUserMessage { itry, content } => f
+            Self::SendUserMessage { itinerary, content } => f
                 .debug_struct("SendUserMessage")
-                .field("itry", itry)
+                .field("itinerary", itinerary)
                 .field("content", &format_args!("{:10}", HexFmt(content)))
                 .finish(),
             Self::ScheduleTimeout { duration, token } => f

src/routing/mod.rs

@@ -312,11 +312,11 @@ impl Routing {
     /// Send a message.
     /// Messages sent here, either section to section or node to node are signed
     /// and validated upon receipt by routing itself.
-    pub async fn send_message(&self, itry: Itinerary, content: Bytes) -> Result<()> {
+    pub async fn send_message(&self, itinerary: Itinerary, content: Bytes) -> Result<()> {
         if let DstLocation::EndUser(EndUser::Client {
             socket_id,
             public_key,
-        }) = itry.dst
+        }) = itinerary.dst
         {
             let socket_addr = self
                 .stage
@@ -338,7 +338,7 @@ impl Routing {
                 debug!("Sending user message instead.. (Command::SendUserMessage)");
             }
         }
-        let command = Command::SendUserMessage { itry, content };
+        let command = Command::SendUserMessage { itinerary, content };
         self.stage.clone().handle_commands(command).await
     }
 

src/routing/stage.rs

@@ -147,9 +147,11 @@ impl Stage {
                 self.send_message(&recipients, delivery_group_size, message)
                     .await
             }
-            Command::SendUserMessage { itry, content } => {
-                self.state.lock().await.send_user_message(itry, content)
-            }
+            Command::SendUserMessage { itinerary, content } => self
+                .state
+                .lock()
+                .await
+                .send_user_message(itinerary, content),
             Command::ScheduleTimeout { duration, token } => Ok(self
                 .handle_schedule_timeout(duration, token)
                 .await

src/routing/tests/mod.rs

@@ -1459,7 +1459,7 @@ async fn message_to_self(dst: MessageDst) -> Result<()> {
 
     let commands = stage
         .handle_command(Command::SendUserMessage {
-            itry: Itinerary {
+            itinerary: Itinerary {
                 src,
                 dst,
                 aggregation: Aggregation::None,

tests/messages.rs

@@ -153,13 +153,15 @@ async fn test_messages_between_nodes() -> Result<()> {
 
     println!("sending msg..");
 
-    let itry = Itinerary {
+    let itinerary = Itinerary {
         src: SrcLocation::Node(node2_name),
         dst: DstLocation::Node(node1_name),
         aggregation: Aggregation::None,
     };
 
-    node2.send_message(itry, Bytes::from_static(msg)).await?;
+    node2
+        .send_message(itinerary, Bytes::from_static(msg))
+        .await?;
 
     println!("msg sent");
 
@@ -168,15 +170,15 @@ async fn test_messages_between_nodes() -> Result<()> {
     println!("Got dst: {:?} (expecting: {}", dst.name(), node2_name);
     println!("sending response from {:?}..", node1_name);
 
-    let itry = Itinerary {
+    let itinerary = Itinerary {
         src: SrcLocation::Node(node1_name),
         dst,
         aggregation: Aggregation::None,
     };
 
     // send response from node1 to node2
     node1
-        .send_message(itry, Bytes::from_static(response))
+        .send_message(itinerary, Bytes::from_static(response))
         .await?;
 
     println!("checking response received..");