Merge branch 'maint'

# Conflicts:
#	src/bin/fips.rs
#	src/bin/fipstop/app.rs
#	src/config/mod.rs
#	src/config/node.rs
#	src/config/transport.rs
#	src/mmp/receiver.rs
#	src/mmp/sender.rs
#	src/node/handlers/handshake.rs
#	src/node/handlers/rekey.rs
#	src/node/lifecycle.rs
#	src/node/mod.rs
#	src/transport/ethernet/socket.rs
#	src/transport/mod.rs
#	src/upper/tun.rs

.git-blame-ignore-revs

@@ -0,0 +1,2 @@
+# rustfmt bulk reformat (maint)
+13c0b70dc3111cf94fef217b0f8b5fdbe469d3eb

.github/workflows/ci.yml

@@ -26,6 +26,16 @@ env:
 # Builds on Linux x86_64, Linux aarch64, and macOS.
 # ─────────────────────────────────────────────────────────────────────────────
 jobs:
+  fmt:
+    name: Format check
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@stable
+        with:
+          components: rustfmt
+      - run: cargo fmt --check
+
   build:
     name: Build (${{ matrix.os }})
     runs-on: ${{ matrix.os }}

rustfmt.toml

@@ -0,0 +1 @@
+# Use stable defaults

src/bin/fipsctl.rs

@@ -7,7 +7,7 @@ use clap::{Parser, Subcommand};
 use fips::config::{write_key_file, write_pub_file};
 use fips::upper::hosts::HostMap;
 use fips::version;
-use fips::{encode_nsec, Identity};
+use fips::{Identity, encode_nsec};
 use std::io::{BufRead, BufReader, Write};
 use std::os::unix::net::UnixStream;
 use std::path::{Path, PathBuf};
@@ -223,12 +223,7 @@ fn main() {
     let cli = Cli::parse();
 
     // Commands that don't require a running daemon
-    if let Commands::Keygen {
-        dir,
-        force,
-        stdout,
-    } = &cli.command
-    {
+    if let Commands::Keygen { dir, force, stdout } = &cli.command {
         let identity = Identity::generate();
         let nsec = encode_nsec(&identity.keypair().secret_key());
         let npub = identity.npub();

src/bin/fipstop/event.rs

@@ -17,27 +17,29 @@ impl EventHandler {
     pub fn new(tick_rate: Duration) -> Self {
         let (tx, rx) = mpsc::channel();
 
-        thread::spawn(move || loop {
-            if event::poll(tick_rate).unwrap_or(false) {
-                if let Ok(evt) = event::read() {
-                    match evt {
-                        CrosstermEvent::Key(key) => {
-                            if tx.send(Event::Key(key)).is_err() {
-                                return;
+        thread::spawn(move || {
+            loop {
+                if event::poll(tick_rate).unwrap_or(false) {
+                    if let Ok(evt) = event::read() {
+                        match evt {
+                            CrosstermEvent::Key(key) => {
+                                if tx.send(Event::Key(key)).is_err() {
+                                    return;
+                                }
                             }
-                        }
-                        CrosstermEvent::Resize(..) => {
-                            if tx.send(Event::Resize).is_err() {
-                                return;
+                            CrosstermEvent::Resize(..) => {
+                                if tx.send(Event::Resize).is_err() {
+                                    return;
+                                }
                             }
+                            _ => {}
                         }
-                        _ => {}
                     }
-                }
-            } else {
-                // Poll timed out — send a tick
-                if tx.send(Event::Tick).is_err() {
-                    return;
+                } else {
+                    // Poll timed out — send a tick
+                    if tx.send(Event::Tick).is_err() {
+                        return;
+                    }
                 }
             }
         });

src/bin/fipstop/ui/bloom.rs

@@ -12,8 +12,8 @@ pub fn draw(frame: &mut Frame, app: &App, area: Rect) {
     let data = match app.data.get(&Tab::Bloom) {
         Some(d) => d,
         None => {
-            let msg = Paragraph::new("  Waiting for data...")
-                .style(Style::default().fg(Color::DarkGray));
+            let msg =
+                Paragraph::new("  Waiting for data...").style(Style::default().fg(Color::DarkGray));
             frame.render_widget(msg, area);
             return;
         }
@@ -22,7 +22,7 @@ pub fn draw(frame: &mut Frame, app: &App, area: Rect) {
     let chunks = Layout::vertical([
         Constraint::Length(7),  // Bloom Filter State
         Constraint::Length(15), // Bloom Announce Stats
-        Constraint::Min(3),    // Peer Filters
+        Constraint::Min(3),     // Peer Filters
     ])
     .split(area);
 
@@ -64,16 +64,28 @@ fn draw_stats(frame: &mut Frame, data: &serde_json::Value, area: Rect) {
         helpers::section_header("Inbound"),
         helpers::kv_line("Received", &helpers::nested_u64(data, "stats", "received")),
         helpers::kv_line("Accepted", &helpers::nested_u64(data, "stats", "accepted")),
-        helpers::kv_line("Decode Error", &helpers::nested_u64(data, "stats", "decode_error")),
+        helpers::kv_line(
+            "Decode Error",
+            &helpers::nested_u64(data, "stats", "decode_error"),
+        ),
         helpers::kv_line("Invalid", &helpers::nested_u64(data, "stats", "invalid")),
         helpers::kv_line("Non-V1", &helpers::nested_u64(data, "stats", "non_v1")),
-        helpers::kv_line("Unknown Peer", &helpers::nested_u64(data, "stats", "unknown_peer")),
+        helpers::kv_line(
+            "Unknown Peer",
+            &helpers::nested_u64(data, "stats", "unknown_peer"),
+        ),
         helpers::kv_line("Stale", &helpers::nested_u64(data, "stats", "stale")),
         Line::from(""),
         helpers::section_header("Outbound"),
         helpers::kv_line("Sent", &helpers::nested_u64(data, "stats", "sent")),
-        helpers::kv_line("Debounce Suppressed", &helpers::nested_u64(data, "stats", "debounce_suppressed")),
-        helpers::kv_line("Send Failed", &helpers::nested_u64(data, "stats", "send_failed")),
+        helpers::kv_line(
+            "Debounce Suppressed",
+            &helpers::nested_u64(data, "stats", "debounce_suppressed"),
+        ),
+        helpers::kv_line(
+            "Send Failed",
+            &helpers::nested_u64(data, "stats", "send_failed"),
+        ),
     ];
 
     let max_lines = inner.height as usize;
@@ -97,8 +109,7 @@ fn draw_peer_filters(frame: &mut Frame, data: &serde_json::Value, area: Rect) {
     frame.render_widget(block, area);
 
     if filters.is_empty() {
-        let msg =
-            Paragraph::new("  No peers").style(Style::default().fg(Color::DarkGray));
+        let msg = Paragraph::new("  No peers").style(Style::default().fg(Color::DarkGray));
         frame.render_widget(msg, inner);
         return;
     }

src/bin/fipstop/ui/dashboard.rs

@@ -12,18 +12,18 @@ pub fn draw(frame: &mut Frame, app: &App, area: Rect) {
     let data = match app.data.get(&crate::app::Tab::Node) {
         Some(d) => d,
         None => {
-            let msg = Paragraph::new("  Waiting for data...")
-                .style(Style::default().fg(Color::DarkGray));
+            let msg =
+                Paragraph::new("  Waiting for data...").style(Style::default().fg(Color::DarkGray));
             frame.render_widget(msg, area);
             return;
         }
     };
 
     let chunks = Layout::vertical([
-        Constraint::Length(7),  // Runtime
-        Constraint::Length(7),  // Identity
-        Constraint::Length(5),  // State
-        Constraint::Length(9),  // Traffic
+        Constraint::Length(7), // Runtime
+        Constraint::Length(7), // Identity
+        Constraint::Length(5), // State
+        Constraint::Length(9), // Traffic
         Constraint::Min(0),    // remaining
     ])
     .split(area);
@@ -35,16 +35,17 @@ pub fn draw(frame: &mut Frame, app: &App, area: Rect) {
 }
 
 fn draw_runtime(frame: &mut Frame, data: &serde_json::Value, area: Rect) {
-    let block = Block::default()
-        .borders(Borders::ALL)
-        .title(" Runtime ");
+    let block = Block::default().borders(Borders::ALL).title(" Runtime ");
     let inner = block.inner(area);
     frame.render_widget(block, area);
 
     let version = helpers::str_field(data, "version");
     let pid = helpers::u64_field(data, "pid");
     let exe = helpers::str_field(data, "exe_path");
-    let uptime_secs = data.get("uptime_secs").and_then(|v| v.as_u64()).unwrap_or(0);
+    let uptime_secs = data
+        .get("uptime_secs")
+        .and_then(|v| v.as_u64())
+        .unwrap_or(0);
     let uptime = format_uptime(uptime_secs);
     let socket = helpers::str_field(data, "control_socket");
     let tun_name = helpers::str_field(data, "tun_name");
@@ -78,9 +79,7 @@ fn draw_runtime(frame: &mut Frame, data: &serde_json::Value, area: Rect) {
 }
 
 fn draw_identity(frame: &mut Frame, data: &serde_json::Value, area: Rect) {
-    let block = Block::default()
-        .borders(Borders::ALL)
-        .title(" Identity ");
+    let block = Block::default().borders(Borders::ALL).title(" Identity ");
     let inner = block.inner(area);
     frame.render_widget(block, area);
 
@@ -109,9 +108,7 @@ fn draw_identity(frame: &mut Frame, data: &serde_json::Value, area: Rect) {
 }
 
 fn draw_state(frame: &mut Frame, data: &serde_json::Value, area: Rect) {
-    let block = Block::default()
-        .borders(Borders::ALL)
-        .title(" State ");
+    let block = Block::default().borders(Borders::ALL).title(" State ");
     let inner = block.inner(area);
     frame.render_widget(block, area);
 
@@ -167,9 +164,7 @@ fn draw_state(frame: &mut Frame, data: &serde_json::Value, area: Rect) {
 }
 
 fn draw_node_stats(frame: &mut Frame, data: &serde_json::Value, area: Rect) {
-    let block = Block::default()
-        .borders(Borders::ALL)
-        .title(" Traffic ");
+    let block = Block::default().borders(Borders::ALL).title(" Traffic ");
     let inner = block.inner(area);
     frame.render_widget(block, area);
 
@@ -197,7 +192,10 @@ fn fwd_line(data: &serde_json::Value, label: &str, pkt_key: &str, byte_key: &str
         .and_then(|f| f.get(byte_key))
         .and_then(|v| v.as_u64())
         .unwrap_or(0);
-    helpers::kv_line(label, &format!("{} pkts ({})", pkts, helpers::format_bytes(bytes)))
+    helpers::kv_line(
+        label,
+        &format!("{} pkts ({})", pkts, helpers::format_bytes(bytes)),
+    )
 }
 
 /// Format seconds as human-readable uptime (e.g., "3d 2h 15m 4s").

src/bin/fipstop/ui/helpers.rs

@@ -119,7 +119,13 @@ pub fn nested_f64(data: &Value, outer: &str, inner: &str, decimals: usize) -> St
 }
 
 /// Get a nested f64 field, preferring `preferred` key with fallback to `fallback` key.
-pub fn nested_f64_prefer(data: &Value, outer: &str, preferred: &str, fallback: &str, decimals: usize) -> String {
+pub fn nested_f64_prefer(
+    data: &Value,
+    outer: &str,
+    preferred: &str,
+    fallback: &str,
+    decimals: usize,
+) -> String {
     data.get(outer)
         .and_then(|o| o.get(preferred).or_else(|| o.get(fallback)))
         .and_then(|v| v.as_f64())
@@ -161,11 +167,7 @@ pub fn section_header(title: &str) -> Line<'static> {
 /// Key-value line for detail views.
 pub fn kv_line(key: &str, value: &str) -> Line<'static> {
     Line::from(vec![
-        Span::styled(
-            format!("    {key}: "),
-            Style::default().fg(Color::DarkGray),
-        ),
+        Span::styled(format!("    {key}: "), Style::default().fg(Color::DarkGray)),
         Span::raw(value.to_string()),
     ])
 }
-

src/bin/fipstop/ui/mmp.rs

@@ -12,18 +12,15 @@ pub fn draw(frame: &mut Frame, app: &App, area: Rect) {
     let data = match app.data.get(&Tab::Mmp) {
         Some(d) => d,
         None => {
-            let msg = Paragraph::new("  Waiting for data...")
-                .style(Style::default().fg(Color::DarkGray));
+            let msg =
+                Paragraph::new("  Waiting for data...").style(Style::default().fg(Color::DarkGray));
             frame.render_widget(msg, area);
             return;
         }
     };
 
-    let chunks = Layout::vertical([
-        Constraint::Percentage(60),
-        Constraint::Percentage(40),
-    ])
-    .split(area);
+    let chunks =
+        Layout::vertical([Constraint::Percentage(60), Constraint::Percentage(40)]).split(area);
 
     draw_link_mmp(frame, data, chunks[0]);
     draw_session_mmp(frame, data, chunks[1]);
@@ -44,8 +41,7 @@ fn draw_link_mmp(frame: &mut Frame, data: &serde_json::Value, area: Rect) {
     frame.render_widget(block, area);
 
     if peers.is_empty() {
-        let msg =
-            Paragraph::new("  No peers").style(Style::default().fg(Color::DarkGray));
+        let msg = Paragraph::new("  No peers").style(Style::default().fg(Color::DarkGray));
         frame.render_widget(msg, inner);
         return;
     }
@@ -152,8 +148,7 @@ fn draw_session_mmp(frame: &mut Frame, data: &serde_json::Value, area: Rect) {
     frame.render_widget(block, area);
 
     if sessions.is_empty() {
-        let msg = Paragraph::new("  No sessions")
-            .style(Style::default().fg(Color::DarkGray));
+        let msg = Paragraph::new("  No sessions").style(Style::default().fg(Color::DarkGray));
         frame.render_widget(msg, inner);
         return;
     }
@@ -234,4 +229,3 @@ fn trend_color(trend: &str, bad_rising: bool) -> Color {
         _ => Color::DarkGray, // "stable"
     }
 }
-

src/bin/fipstop/ui/mod.rs

@@ -20,7 +20,7 @@ use crate::app::{App, ConnectionState, Tab};
 pub fn draw(frame: &mut Frame, app: &mut App) {
     let chunks = Layout::vertical([
         Constraint::Length(3), // tab bar
-        Constraint::Min(1),   // content
+        Constraint::Min(1),    // content
         Constraint::Length(1), // status bar
     ])
     .split(frame.area());
@@ -52,7 +52,11 @@ fn draw_tab_bar(frame: &mut Frame, app: &App, area: Rect) {
                 spans.push(Span::styled(" | ", divider));
             }
         }
-        let style = if *tab == app.active_tab { highlight } else { normal };
+        let style = if *tab == app.active_tab {
+            highlight
+        } else {
+            normal
+        };
         spans.push(Span::styled(tab.label(), style));
     }
 

src/bin/fipstop/ui/peers.rs

@@ -2,7 +2,9 @@ use ratatui::Frame;
 use ratatui::layout::{Constraint, Layout, Rect};
 use ratatui::style::{Color, Modifier, Style};
 use ratatui::text::Line;
-use ratatui::widgets::{Block, Borders, Cell, Paragraph, Row, Scrollbar, ScrollbarOrientation, ScrollbarState, Table};
+use ratatui::widgets::{
+    Block, Borders, Cell, Paragraph, Row, Scrollbar, ScrollbarOrientation, ScrollbarState, Table,
+};
 
 use crate::app::{App, Tab};
 
@@ -14,11 +16,8 @@ pub fn draw(frame: &mut Frame, app: &mut App, area: Rect) {
 
     if app.detail_view.is_some() {
         // Split: left 40% table, right 60% detail
-        let chunks = Layout::horizontal([
-            Constraint::Percentage(40),
-            Constraint::Percentage(60),
-        ])
-        .split(area);
+        let chunks = Layout::horizontal([Constraint::Percentage(40), Constraint::Percentage(60)])
+            .split(area);
 
         draw_table(frame, app, chunks[0], &peers, row_count);
         draw_detail(frame, app, chunks[1], &peers);
@@ -29,7 +28,8 @@ pub fn draw(frame: &mut Frame, app: &mut App, area: Rect) {
 
 /// Get peers sorted by LQI ascending (best first). Peers without LQI sort last.
 fn get_peers_sorted(app: &App) -> Vec<serde_json::Value> {
-    let mut peers = app.data
+    let mut peers = app
+        .data
         .get(&Tab::Peers)
         .and_then(|v| v.get("peers"))
         .and_then(|v| v.as_array())
@@ -37,8 +37,14 @@ fn get_peers_sorted(app: &App) -> Vec<serde_json::Value> {
         .unwrap_or_default();
 
     peers.sort_by(|a, b| {
-        let lqi_a = a.get("mmp").and_then(|m| m.get("lqi")).and_then(|v| v.as_f64());
-        let lqi_b = b.get("mmp").and_then(|m| m.get("lqi")).and_then(|v| v.as_f64());
+        let lqi_a = a
+            .get("mmp")
+            .and_then(|m| m.get("lqi"))
+            .and_then(|v| v.as_f64());
+        let lqi_b = b
+            .get("mmp")
+            .and_then(|m| m.get("lqi"))
+            .and_then(|v| v.as_f64());
         match (lqi_a, lqi_b) {
             (Some(a), Some(b)) => a.partial_cmp(&b).unwrap_or(std::cmp::Ordering::Equal),
             (Some(_), None) => std::cmp::Ordering::Less,
@@ -50,7 +56,13 @@ fn get_peers_sorted(app: &App) -> Vec<serde_json::Value> {
     peers
 }
 
-fn draw_table(frame: &mut Frame, app: &mut App, area: Rect, peers: &[serde_json::Value], row_count: usize) {
+fn draw_table(
+    frame: &mut Frame,
+    app: &mut App,
+    area: Rect,
+    peers: &[serde_json::Value],
+    row_count: usize,
+) {
     let header = Row::new(vec![
         Cell::from("Name"),
         Cell::from("Npub"),
@@ -74,13 +86,25 @@ fn draw_table(frame: &mut Frame, app: &mut App, area: Rect, peers: &[serde_json:
         .map(|peer| {
             let name = helpers::str_field(peer, "display_name");
             let npub = helpers::str_field(peer, "npub");
-            let is_parent = peer.get("is_parent").and_then(|v| v.as_bool()).unwrap_or(false);
-            let is_child = peer.get("is_child").and_then(|v| v.as_bool()).unwrap_or(false);
+            let is_parent = peer
+                .get("is_parent")
+                .and_then(|v| v.as_bool())
+                .unwrap_or(false);
+            let is_child = peer
+                .get("is_child")
+                .and_then(|v| v.as_bool())
+                .unwrap_or(false);
 
             // Transport: "type addr" (e.g., "udp 1.2.3.4:2121")
             let transport = {
-                let t_type = peer.get("transport_type").and_then(|v| v.as_str()).unwrap_or("");
-                let t_addr = peer.get("transport_addr").and_then(|v| v.as_str()).unwrap_or("");
+                let t_type = peer
+                    .get("transport_type")
+                    .and_then(|v| v.as_str())
+                    .unwrap_or("");
+                let t_addr = peer
+                    .get("transport_addr")
+                    .and_then(|v| v.as_str())
+                    .unwrap_or("");
                 if t_type.is_empty() && t_addr.is_empty() {
                     "-".to_string()
                 } else if t_type.is_empty() {
@@ -92,11 +116,15 @@ fn draw_table(frame: &mut Frame, app: &mut App, area: Rect, peers: &[serde_json:
                 }
             };
 
-            let dir = peer.get("direction").and_then(|v| v.as_str()).map(|d| match d {
-                "inbound" => "in",
-                "outbound" => "out",
-                other => other,
-            }).unwrap_or("-");
+            let dir = peer
+                .get("direction")
+                .and_then(|v| v.as_str())
+                .map(|d| match d {
+                    "inbound" => "in",
+                    "outbound" => "out",
+                    other => other,
+                })
+                .unwrap_or("-");
             let srtt = helpers::nested_f64(peer, "mmp", "srtt_ms", 1);
             let loss = helpers::nested_f64_prefer(peer, "mmp", "smoothed_loss", "loss_rate", 3);
             let lqi = helpers::nested_f64(peer, "mmp", "lqi", 2);
@@ -130,16 +158,16 @@ fn draw_table(frame: &mut Frame, app: &mut App, area: Rect, peers: &[serde_json:
         .collect();
 
     let widths = [
-        Constraint::Min(12),      // Name
-        Constraint::Length(67),    // Npub (full bech32)
-        Constraint::Min(20),      // Transport
-        Constraint::Length(4),     // Dir
-        Constraint::Length(8),     // SRTT
-        Constraint::Length(7),     // Loss
-        Constraint::Length(6),     // LQI
-        Constraint::Length(10),    // Goodput
-        Constraint::Length(9),     // Pkts Tx
-        Constraint::Length(9),     // Pkts Rx
+        Constraint::Min(12),    // Name
+        Constraint::Length(67), // Npub (full bech32)
+        Constraint::Min(20),    // Transport
+        Constraint::Length(4),  // Dir
+        Constraint::Length(8),  // SRTT
+        Constraint::Length(7),  // Loss
+        Constraint::Length(6),  // LQI
+        Constraint::Length(10), // Goodput
+        Constraint::Length(9),  // Pkts Tx
+        Constraint::Length(9),  // Pkts Rx
     ];
 
     let table = Table::new(rows, widths)
@@ -189,10 +217,22 @@ fn draw_detail(frame: &mut Frame, app: &App, area: Rect, peers: &[serde_json::Va
         return;
     };
 
-    let has_tree = peer.get("has_tree_position").and_then(|v| v.as_bool()).unwrap_or(false);
-    let has_bloom = peer.get("has_bloom_filter").and_then(|v| v.as_bool()).unwrap_or(false);
-    let is_parent = peer.get("is_parent").and_then(|v| v.as_bool()).unwrap_or(false);
-    let is_child = peer.get("is_child").and_then(|v| v.as_bool()).unwrap_or(false);
+    let has_tree = peer
+        .get("has_tree_position")
+        .and_then(|v| v.as_bool())
+        .unwrap_or(false);
+    let has_bloom = peer
+        .get("has_bloom_filter")
+        .and_then(|v| v.as_bool())
+        .unwrap_or(false);
+    let is_parent = peer
+        .get("is_parent")
+        .and_then(|v| v.as_bool())
+        .unwrap_or(false);
+    let is_child = peer
+        .get("is_child")
+        .and_then(|v| v.as_bool())
+        .unwrap_or(false);
 
     let tree_role = if is_parent {
         "parent"
@@ -215,7 +255,12 @@ fn draw_detail(frame: &mut Frame, app: &App, area: Rect, peers: &[serde_json::Va
         helpers::section_header("Connection"),
         helpers::kv_line("Connectivity", helpers::str_field(peer, "connectivity")),
         helpers::kv_line("Link ID", &helpers::u64_field(peer, "link_id")),
-        helpers::kv_line("Direction", peer.get("direction").and_then(|v| v.as_str()).unwrap_or("-")),
+        helpers::kv_line(
+            "Direction",
+            peer.get("direction")
+                .and_then(|v| v.as_str())
+                .unwrap_or("-"),
+        ),
     ];
     if let Some(addr) = peer.get("transport_addr").and_then(|v| v.as_str()) {
         lines.push(helpers::kv_line("Transport Addr", addr));
@@ -227,30 +272,52 @@ fn draw_detail(frame: &mut Frame, app: &App, area: Rect, peers: &[serde_json::Va
     let link_id = peer.get("link_id").and_then(|v| v.as_u64());
     let link = lookup_link(app, link_id);
     if let Some(ref link) = link {
-        lines.push(helpers::kv_line("Link State", helpers::str_field(link, "state")));
+        lines.push(helpers::kv_line(
+            "Link State",
+            helpers::str_field(link, "state"),
+        ));
     }
     lines.extend([
-        helpers::kv_line("Authenticated", &helpers::format_elapsed_ms(
-            peer.get("authenticated_at_ms").and_then(|v| v.as_u64()).unwrap_or(0),
-        )),
-        helpers::kv_line("Last Seen", &helpers::format_elapsed_ms(
-            peer.get("last_seen_ms").and_then(|v| v.as_u64()).unwrap_or(0),
-        )),
+        helpers::kv_line(
+            "Authenticated",
+            &helpers::format_elapsed_ms(
+                peer.get("authenticated_at_ms")
+                    .and_then(|v| v.as_u64())
+                    .unwrap_or(0),
+            ),
+        ),
+        helpers::kv_line(
+            "Last Seen",
+            &helpers::format_elapsed_ms(
+                peer.get("last_seen_ms")
+                    .and_then(|v| v.as_u64())
+                    .unwrap_or(0),
+            ),
+        ),
         Line::from(""),
     ]);
 
     // Transport info (cross-referenced from link -> transport)
     if let Some(transport) = link.as_ref().and_then(|l| lookup_transport(app, l)) {
         lines.push(helpers::section_header("Transport"));
-        lines.push(helpers::kv_line("Type", helpers::str_field(&transport, "type")));
+        lines.push(helpers::kv_line(
+            "Type",
+            helpers::str_field(&transport, "type"),
+        ));
         if let Some(name) = transport.get("name").and_then(|v| v.as_str()) {
             lines.push(helpers::kv_line("Name", name));
         }
-        lines.push(helpers::kv_line("MTU", &helpers::u64_field(&transport, "mtu")));
+        lines.push(helpers::kv_line(
+            "MTU",
+            &helpers::u64_field(&transport, "mtu"),
+        ));
         if let Some(addr) = transport.get("local_addr").and_then(|v| v.as_str()) {
             lines.push(helpers::kv_line("Local Addr", addr));
         }
-        lines.push(helpers::kv_line("State", helpers::str_field(&transport, "state")));
+        lines.push(helpers::kv_line(
+            "State",
+            helpers::str_field(&transport, "state"),
+        ));
         lines.push(Line::from(""));
     }
 
@@ -268,28 +335,70 @@ fn draw_detail(frame: &mut Frame, app: &App, area: Rect, peers: &[serde_json::Va
         Line::from(""),
         // Stats
         helpers::section_header("Link Stats"),
-        helpers::kv_line("Pkts Sent", &helpers::nested_u64(peer, "stats", "packets_sent")),
-        helpers::kv_line("Pkts Recv", &helpers::nested_u64(peer, "stats", "packets_recv")),
-        helpers::kv_line("Bytes Sent", &helpers::format_bytes(
-            peer.get("stats").and_then(|s| s.get("bytes_sent")).and_then(|v| v.as_u64()).unwrap_or(0),
-        )),
-        helpers::kv_line("Bytes Recv", &helpers::format_bytes(
-            peer.get("stats").and_then(|s| s.get("bytes_recv")).and_then(|v| v.as_u64()).unwrap_or(0),
-        )),
+        helpers::kv_line(
+            "Pkts Sent",
+            &helpers::nested_u64(peer, "stats", "packets_sent"),
+        ),
+        helpers::kv_line(
+            "Pkts Recv",
+            &helpers::nested_u64(peer, "stats", "packets_recv"),
+        ),
+        helpers::kv_line(
+            "Bytes Sent",
+            &helpers::format_bytes(
+                peer.get("stats")
+                    .and_then(|s| s.get("bytes_sent"))
+                    .and_then(|v| v.as_u64())
+                    .unwrap_or(0),
+            ),
+        ),
+        helpers::kv_line(
+            "Bytes Recv",
+            &helpers::format_bytes(
+                peer.get("stats")
+                    .and_then(|s| s.get("bytes_recv"))
+                    .and_then(|v| v.as_u64())
+                    .unwrap_or(0),
+            ),
+        ),
         Line::from(""),
     ]);
 
     // MMP (if present)
     if peer.get("mmp").is_some() {
         lines.push(helpers::section_header("MMP Metrics"));
-        lines.push(helpers::kv_line("Mode", &helpers::nested_str(peer, "mmp", "mode")));
-        lines.push(helpers::kv_line("SRTT", &format!("{}ms", helpers::nested_f64(peer, "mmp", "srtt_ms", 1))));
-        lines.push(helpers::kv_line("Loss Rate", &helpers::nested_f64_prefer(peer, "mmp", "smoothed_loss", "loss_rate", 4)));
-        lines.push(helpers::kv_line("ETX", &helpers::nested_f64_prefer(peer, "mmp", "smoothed_etx", "etx", 2)));
-        lines.push(helpers::kv_line("LQI", &helpers::nested_f64(peer, "mmp", "lqi", 2)));
-        lines.push(helpers::kv_line("Goodput", &helpers::nested_throughput(peer, "mmp", "goodput_bps")));
-        lines.push(helpers::kv_line("Delivery Fwd", &helpers::nested_f64(peer, "mmp", "delivery_ratio_forward", 3)));
-        lines.push(helpers::kv_line("Delivery Rev", &helpers::nested_f64(peer, "mmp", "delivery_ratio_reverse", 3)));
+        lines.push(helpers::kv_line(
+            "Mode",
+            &helpers::nested_str(peer, "mmp", "mode"),
+        ));
+        lines.push(helpers::kv_line(
+            "SRTT",
+            &format!("{}ms", helpers::nested_f64(peer, "mmp", "srtt_ms", 1)),
+        ));
+        lines.push(helpers::kv_line(
+            "Loss Rate",
+            &helpers::nested_f64_prefer(peer, "mmp", "smoothed_loss", "loss_rate", 4),
+        ));
+        lines.push(helpers::kv_line(
+            "ETX",
+            &helpers::nested_f64_prefer(peer, "mmp", "smoothed_etx", "etx", 2),
+        ));
+        lines.push(helpers::kv_line(
+            "LQI",
+            &helpers::nested_f64(peer, "mmp", "lqi", 2),
+        ));
+        lines.push(helpers::kv_line(
+            "Goodput",
+            &helpers::nested_throughput(peer, "mmp", "goodput_bps"),
+        ));
+        lines.push(helpers::kv_line(
+            "Delivery Fwd",
+            &helpers::nested_f64(peer, "mmp", "delivery_ratio_forward", 3),
+        ));
+        lines.push(helpers::kv_line(
+            "Delivery Rev",
+            &helpers::nested_f64(peer, "mmp", "delivery_ratio_reverse", 3),
+        ));
     }
 
     let detail_scroll = app.detail_view.as_ref().map(|d| d.scroll).unwrap_or(0);
@@ -320,4 +429,3 @@ fn lookup_transport(app: &App, link: &serde_json::Value) -> Option<serde_json::V
         .find(|t| t.get("transport_id").and_then(|v| v.as_u64()) == Some(transport_id))
         .cloned()
 }
-

src/bin/fipstop/ui/routing.rs

@@ -12,16 +12,16 @@ pub fn draw(frame: &mut Frame, app: &App, area: Rect) {
     let data = match app.data.get(&Tab::Routing) {
         Some(d) => d,
         None => {
-            let msg = Paragraph::new("  Waiting for data...")
-                .style(Style::default().fg(Color::DarkGray));
+            let msg =
+                Paragraph::new("  Waiting for data...").style(Style::default().fg(Color::DarkGray));
             frame.render_widget(msg, area);
             return;
         }
     };
 
     let chunks = Layout::vertical([
-        Constraint::Length(7),  // Routing State
-        Constraint::Length(8),  // Coordinate Cache
+        Constraint::Length(7), // Routing State
+        Constraint::Length(8), // Coordinate Cache
         Constraint::Min(3),    // Routing Statistics
     ])
     .split(area);
@@ -33,7 +33,10 @@ pub fn draw(frame: &mut Frame, app: &App, area: Rect) {
 
 fn draw_routing_state(frame: &mut Frame, data: &serde_json::Value, area: Rect) {
     let lines = vec![
-        helpers::kv_line("Coord Cache", &helpers::u64_field(data, "coord_cache_entries")),
+        helpers::kv_line(
+            "Coord Cache",
+            &helpers::u64_field(data, "coord_cache_entries"),
+        ),
         helpers::kv_line(
             "Identity Cache",
             &helpers::u64_field(data, "identity_cache_entries"),
@@ -68,7 +71,10 @@ fn fwd_line(data: &serde_json::Value, label: &str, pkt_key: &str, byte_key: &str
         .and_then(|f| f.get(byte_key))
         .and_then(|v| v.as_u64())
         .unwrap_or(0);
-    helpers::kv_line(label, &format!("{} pkts ({})", pkts, helpers::format_bytes(bytes)))
+    helpers::kv_line(
+        label,
+        &format!("{} pkts ({})", pkts, helpers::format_bytes(bytes)),
+    )
 }
 
 fn draw_routing_stats(frame: &mut Frame, data: &serde_json::Value, area: Rect) {
@@ -78,11 +84,8 @@ fn draw_routing_stats(frame: &mut Frame, data: &serde_json::Value, area: Rect) {
     let inner = block.inner(area);
     frame.render_widget(block, area);
 
-    let cols = Layout::horizontal([
-        Constraint::Percentage(50),
-        Constraint::Percentage(50),
-    ])
-    .split(inner);
+    let cols =
+        Layout::horizontal([Constraint::Percentage(50), Constraint::Percentage(50)]).split(inner);
 
     // Left column: Forwarding + Discovery
     let mut left = vec![
@@ -91,47 +94,147 @@ fn draw_routing_stats(frame: &mut Frame, data: &serde_json::Value, area: Rect) {
         fwd_line(data, "Delivered", "delivered_packets", "delivered_bytes"),
         fwd_line(data, "Forwarded", "forwarded_packets", "forwarded_bytes"),
         fwd_line(data, "Originated", "originated_packets", "originated_bytes"),
-        fwd_line(data, "Decode Error", "decode_error_packets", "decode_error_bytes"),
-        fwd_line(data, "TTL Exhausted", "ttl_exhausted_packets", "ttl_exhausted_bytes"),
-        fwd_line(data, "No Route", "drop_no_route_packets", "drop_no_route_bytes"),
-        fwd_line(data, "MTU Exceeded", "drop_mtu_exceeded_packets", "drop_mtu_exceeded_bytes"),
-        fwd_line(data, "Send Error", "drop_send_error_packets", "drop_send_error_bytes"),
+        fwd_line(
+            data,
+            "Decode Error",
+            "decode_error_packets",
+            "decode_error_bytes",
+        ),
+        fwd_line(
+            data,
+            "TTL Exhausted",
+            "ttl_exhausted_packets",
+            "ttl_exhausted_bytes",
+        ),
+        fwd_line(
+            data,
+            "No Route",
+            "drop_no_route_packets",
+            "drop_no_route_bytes",
+        ),
+        fwd_line(
+            data,
+            "MTU Exceeded",
+            "drop_mtu_exceeded_packets",
+            "drop_mtu_exceeded_bytes",
+        ),
+        fwd_line(
+            data,
+            "Send Error",
+            "drop_send_error_packets",
+            "drop_send_error_bytes",
+        ),
         Line::from(""),
         helpers::section_header("Discovery Requests"),
-        helpers::kv_line("Received", &helpers::nested_u64(data, "discovery", "req_received")),
-        helpers::kv_line("Forwarded", &helpers::nested_u64(data, "discovery", "req_forwarded")),
-        helpers::kv_line("Initiated", &helpers::nested_u64(data, "discovery", "req_initiated")),
-        helpers::kv_line("Deduplicated", &helpers::nested_u64(data, "discovery", "req_deduplicated")),
-        helpers::kv_line("Target Is Us", &helpers::nested_u64(data, "discovery", "req_target_is_us")),
-        helpers::kv_line("Duplicate", &helpers::nested_u64(data, "discovery", "req_duplicate")),
-        helpers::kv_line("Bloom Miss", &helpers::nested_u64(data, "discovery", "req_bloom_miss")),
-        helpers::kv_line("Backoff Suppressed", &helpers::nested_u64(data, "discovery", "req_backoff_suppressed")),
-        helpers::kv_line("Fwd Rate Limited", &helpers::nested_u64(data, "discovery", "req_forward_rate_limited")),
-        helpers::kv_line("TTL Exhausted", &helpers::nested_u64(data, "discovery", "req_ttl_exhausted")),
-        helpers::kv_line("Decode Error", &helpers::nested_u64(data, "discovery", "req_decode_error")),
+        helpers::kv_line(
+            "Received",
+            &helpers::nested_u64(data, "discovery", "req_received"),
+        ),
+        helpers::kv_line(
+            "Forwarded",
+            &helpers::nested_u64(data, "discovery", "req_forwarded"),
+        ),
+        helpers::kv_line(
+            "Initiated",
+            &helpers::nested_u64(data, "discovery", "req_initiated"),
+        ),
+        helpers::kv_line(
+            "Deduplicated",
+            &helpers::nested_u64(data, "discovery", "req_deduplicated"),
+        ),
+        helpers::kv_line(
+            "Target Is Us",
+            &helpers::nested_u64(data, "discovery", "req_target_is_us"),
+        ),
+        helpers::kv_line(
+            "Duplicate",
+            &helpers::nested_u64(data, "discovery", "req_duplicate"),
+        ),
+        helpers::kv_line(
+            "Bloom Miss",
+            &helpers::nested_u64(data, "discovery", "req_bloom_miss"),
+        ),
+        helpers::kv_line(
+            "Backoff Suppressed",
+            &helpers::nested_u64(data, "discovery", "req_backoff_suppressed"),
+        ),
+        helpers::kv_line(
+            "Fwd Rate Limited",
+            &helpers::nested_u64(data, "discovery", "req_forward_rate_limited"),
+        ),
+        helpers::kv_line(
+            "TTL Exhausted",
+            &helpers::nested_u64(data, "discovery", "req_ttl_exhausted"),
+        ),
+        helpers::kv_line(
+            "Decode Error",
+            &helpers::nested_u64(data, "discovery", "req_decode_error"),
+        ),
         Line::from(""),
         helpers::section_header("Discovery Responses"),
-        helpers::kv_line("Received", &helpers::nested_u64(data, "discovery", "resp_received")),
-        helpers::kv_line("Accepted", &helpers::nested_u64(data, "discovery", "resp_accepted")),
-        helpers::kv_line("Forwarded", &helpers::nested_u64(data, "discovery", "resp_forwarded")),
-        helpers::kv_line("Timed Out", &helpers::nested_u64(data, "discovery", "resp_timed_out")),
-        helpers::kv_line("Identity Miss", &helpers::nested_u64(data, "discovery", "resp_identity_miss")),
-        helpers::kv_line("Proof Failed", &helpers::nested_u64(data, "discovery", "resp_proof_failed")),
-        helpers::kv_line("Decode Error", &helpers::nested_u64(data, "discovery", "resp_decode_error")),
+        helpers::kv_line(
+            "Received",
+            &helpers::nested_u64(data, "discovery", "resp_received"),
+        ),
+        helpers::kv_line(
+            "Accepted",
+            &helpers::nested_u64(data, "discovery", "resp_accepted"),
+        ),
+        helpers::kv_line(
+            "Forwarded",
+            &helpers::nested_u64(data, "discovery", "resp_forwarded"),
+        ),
+        helpers::kv_line(
+            "Timed Out",
+            &helpers::nested_u64(data, "discovery", "resp_timed_out"),
+        ),
+        helpers::kv_line(
+            "Identity Miss",
+            &helpers::nested_u64(data, "discovery", "resp_identity_miss"),
+        ),
+        helpers::kv_line(
+            "Proof Failed",
+            &helpers::nested_u64(data, "discovery", "resp_proof_failed"),
+        ),
+        helpers::kv_line(
+            "Decode Error",
+            &helpers::nested_u64(data, "discovery", "resp_decode_error"),
+        ),
     ];
 
     // Right column: Error Signals + Congestion
     let mut right = vec![
         helpers::section_header("Error Signals"),
-        helpers::kv_line("Coords Required", &helpers::nested_u64(data, "error_signals", "coords_required")),
-        helpers::kv_line("Path Broken", &helpers::nested_u64(data, "error_signals", "path_broken")),
-        helpers::kv_line("MTU Exceeded", &helpers::nested_u64(data, "error_signals", "mtu_exceeded")),
+        helpers::kv_line(
+            "Coords Required",
+            &helpers::nested_u64(data, "error_signals", "coords_required"),
+        ),
+        helpers::kv_line(
+            "Path Broken",
+            &helpers::nested_u64(data, "error_signals", "path_broken"),
+        ),
+        helpers::kv_line(
+            "MTU Exceeded",
+            &helpers::nested_u64(data, "error_signals", "mtu_exceeded"),
+        ),
         Line::from(""),
         helpers::section_header("Congestion"),
-        helpers::kv_line("CE Forwarded", &helpers::nested_u64(data, "congestion", "ce_forwarded")),
-        helpers::kv_line("CE Received", &helpers::nested_u64(data, "congestion", "ce_received")),
-        helpers::kv_line("Congestion Detected", &helpers::nested_u64(data, "congestion", "congestion_detected")),
-        helpers::kv_line("Kernel Drops", &helpers::nested_u64(data, "congestion", "kernel_drop_events")),
+        helpers::kv_line(
+            "CE Forwarded",
+            &helpers::nested_u64(data, "congestion", "ce_forwarded"),
+        ),
+        helpers::kv_line(
+            "CE Received",
+            &helpers::nested_u64(data, "congestion", "ce_received"),
+        ),
+        helpers::kv_line(
+            "Congestion Detected",
+            &helpers::nested_u64(data, "congestion", "congestion_detected"),
+        ),
+        helpers::kv_line(
+            "Kernel Drops",
+            &helpers::nested_u64(data, "congestion", "kernel_drop_events"),
+        ),
     ];
 
     let max_lines = cols[0].height as usize;

src/bin/fipstop/ui/sessions.rs

@@ -15,11 +15,8 @@ pub fn draw(frame: &mut Frame, app: &mut App, area: Rect) {
     let row_count = sessions.len();
 
     if app.detail_view.is_some() {
-        let chunks = Layout::horizontal([
-            Constraint::Percentage(40),
-            Constraint::Percentage(60),
-        ])
-        .split(area);
+        let chunks = Layout::horizontal([Constraint::Percentage(40), Constraint::Percentage(60)])
+            .split(area);
 
         draw_table(frame, app, chunks[0], &sessions, row_count);
         draw_detail(frame, app, chunks[1], &sessions);
@@ -223,10 +220,7 @@ fn draw_detail(frame: &mut Frame, app: &App, area: Rect, sessions: &[serde_json:
         ));
         lines.push(helpers::kv_line(
             "SRTT",
-            &format!(
-                "{}ms",
-                helpers::nested_f64(session, "mmp", "srtt_ms", 1)
-            ),
+            &format!("{}ms", helpers::nested_f64(session, "mmp", "srtt_ms", 1)),
         ));
         lines.push(helpers::kv_line(
             "Loss Rate",
@@ -271,4 +265,3 @@ fn state_styled(state: &str) -> Span<'static> {
     };
     Span::styled(state.to_string(), Style::default().fg(color))
 }
-

src/bin/fipstop/ui/transports.rs

@@ -33,11 +33,8 @@ pub fn draw(frame: &mut Frame, app: &mut App, area: Rect) {
     update_selected_tree_item(app, &tree_rows);
 
     if app.detail_view.is_some() {
-        let chunks = Layout::horizontal([
-            Constraint::Percentage(40),
-            Constraint::Percentage(60),
-        ])
-        .split(area);
+        let chunks = Layout::horizontal([Constraint::Percentage(40), Constraint::Percentage(60)])
+            .split(area);
 
         draw_table(frame, app, chunks[0], &transports, &links, &tree_rows);
         draw_detail(frame, app, chunks[1], &transports, &links, &tree_rows);
@@ -110,9 +107,7 @@ fn update_selected_tree_item(app: &mut App, tree_rows: &[TreeRow]) {
         .unwrap_or(0);
 
     app.selected_tree_item = match tree_rows.get(selected) {
-        Some(TreeRow::Transport { transport_id, .. }) => {
-            SelectedTreeItem::Transport(*transport_id)
-        }
+        Some(TreeRow::Transport { transport_id, .. }) => SelectedTreeItem::Transport(*transport_id),
         Some(TreeRow::Link { .. }) => SelectedTreeItem::Link,
         None => SelectedTreeItem::None,
     };
@@ -169,11 +164,7 @@ fn draw_table(
                         .get("onion_address")
                         .and_then(|v| v.as_str())
                         .map(|a| {
-                            let short = if a.len() > 16 {
-                                &a[..16]
-                            } else {
-                                a
-                            };
+                            let short = if a.len() > 16 { &a[..16] } else { a };
                             format!(" {short}..")
                         })
                         .unwrap_or_default();
@@ -209,7 +200,11 @@ fn draw_table(
             }
             TreeRow::Link { index, is_last } => {
                 let link = &links[*index];
-                let tree_char = if *is_last { "\u{2514}\u{2500}" } else { "\u{251C}\u{2500}" }; // └─ or ├─
+                let tree_char = if *is_last {
+                    "\u{2514}\u{2500}"
+                } else {
+                    "\u{251C}\u{2500}"
+                }; // └─ or ├─
                 let dir = helpers::str_field(link, "direction");
                 let dir_short = match dir {
                     "Outbound" => "Out",
@@ -303,13 +298,10 @@ fn draw_detail(
         .unwrap_or(0);
 
     let Some(tree_row) = tree_rows.get(selected) else {
-        let block = Block::default()
-            .borders(Borders::ALL)
-            .title(" Detail ");
+        let block = Block::default().borders(Borders::ALL).title(" Detail ");
         let inner = block.inner(area);
         frame.render_widget(block, area);
-        let msg = Paragraph::new("  No item selected")
-            .style(Style::default().fg(Color::DarkGray));
+        let msg = Paragraph::new("  No item selected").style(Style::default().fg(Color::DarkGray));
         frame.render_widget(msg, inner);
         return;
     };
@@ -539,7 +531,10 @@ fn draw_transport_detail(frame: &mut Frame, app: &App, area: Rect, t: &serde_jso
                 "Network",
                 &helpers::nested_str(t, "tor_monitoring", "network_liveness"),
             ));
-            lines.push(helpers::kv_line("Dormant", helpers::bool_field(mon, "dormant")));
+            lines.push(helpers::kv_line(
+                "Dormant",
+                helpers::bool_field(mon, "dormant"),
+            ));
 
             let tor_read = mon
                 .get("traffic_read")

src/bin/fipstop/ui/tree.rs

@@ -12,8 +12,8 @@ pub fn draw(frame: &mut Frame, app: &App, area: Rect) {
     let data = match app.data.get(&Tab::Tree) {
         Some(d) => d,
         None => {
-            let msg = Paragraph::new("  Waiting for data...")
-                .style(Style::default().fg(Color::DarkGray));
+            let msg =
+                Paragraph::new("  Waiting for data...").style(Style::default().fg(Color::DarkGray));
             frame.render_widget(msg, area);
             return;
         }
@@ -22,7 +22,7 @@ pub fn draw(frame: &mut Frame, app: &App, area: Rect) {
     let chunks = Layout::vertical([
         Constraint::Length(10), // Tree Position
         Constraint::Length(22), // Tree Announce Stats
-        Constraint::Min(3),    // Tree Peers
+        Constraint::Min(3),     // Tree Peers
     ])
     .split(area);
 
@@ -70,16 +70,12 @@ fn draw_position(frame: &mut Frame, data: &serde_json::Value, area: Rect) {
         )];
 
         if coords.is_empty() {
-            path_parts.push(Span::styled(
-                "[root]",
-                Style::default().fg(Color::Yellow),
-            ));
+            path_parts.push(Span::styled("[root]", Style::default().fg(Color::Yellow)));
         } else {
             // Reverse: root first, self last
             for (i, entry) in coords.iter().rev().enumerate() {
                 if i > 0 {
-                    path_parts
-                        .push(Span::styled(" > ", Style::default().fg(Color::DarkGray)));
+                    path_parts.push(Span::styled(" > ", Style::default().fg(Color::DarkGray)));
                 }
                 let hex = entry.as_str().unwrap_or("-");
                 let color = if i == 0 {
@@ -87,8 +83,10 @@ fn draw_position(frame: &mut Frame, data: &serde_json::Value, area: Rect) {
                 } else {
                     Color::White
                 };
-                path_parts
-                    .push(Span::styled(helpers::truncate_hex(hex, 8), Style::default().fg(color)));
+                path_parts.push(Span::styled(
+                    helpers::truncate_hex(hex, 8),
+                    Style::default().fg(color),
+                ));
             }
             path_parts.push(Span::styled(" > ", Style::default().fg(Color::DarkGray)));
             path_parts.push(Span::styled(
@@ -121,24 +119,60 @@ fn draw_stats(frame: &mut Frame, data: &serde_json::Value, area: Rect) {
         helpers::section_header("Inbound"),
         helpers::kv_line("Received", &helpers::nested_u64(data, "stats", "received")),
         helpers::kv_line("Accepted", &helpers::nested_u64(data, "stats", "accepted")),
-        helpers::kv_line("Decode Error", &helpers::nested_u64(data, "stats", "decode_error")),
-        helpers::kv_line("Unknown Peer", &helpers::nested_u64(data, "stats", "unknown_peer")),
-        helpers::kv_line("Addr Mismatch", &helpers::nested_u64(data, "stats", "addr_mismatch")),
-        helpers::kv_line("Sig Failed", &helpers::nested_u64(data, "stats", "sig_failed")),
+        helpers::kv_line(
+            "Decode Error",
+            &helpers::nested_u64(data, "stats", "decode_error"),
+        ),
+        helpers::kv_line(
+            "Unknown Peer",
+            &helpers::nested_u64(data, "stats", "unknown_peer"),
+        ),
+        helpers::kv_line(
+            "Addr Mismatch",
+            &helpers::nested_u64(data, "stats", "addr_mismatch"),
+        ),
+        helpers::kv_line(
+            "Sig Failed",
+            &helpers::nested_u64(data, "stats", "sig_failed"),
+        ),
         helpers::kv_line("Stale", &helpers::nested_u64(data, "stats", "stale")),
-        helpers::kv_line("Parent Switched", &helpers::nested_u64(data, "stats", "parent_switched")),
-        helpers::kv_line("Loop Detected", &helpers::nested_u64(data, "stats", "loop_detected")),
-        helpers::kv_line("Ancestry Changed", &helpers::nested_u64(data, "stats", "ancestry_changed")),
+        helpers::kv_line(
+            "Parent Switched",
+            &helpers::nested_u64(data, "stats", "parent_switched"),
+        ),
+        helpers::kv_line(
+            "Loop Detected",
+            &helpers::nested_u64(data, "stats", "loop_detected"),
+        ),
+        helpers::kv_line(
+            "Ancestry Changed",
+            &helpers::nested_u64(data, "stats", "ancestry_changed"),
+        ),
         Line::from(""),
         helpers::section_header("Outbound"),
         helpers::kv_line("Sent", &helpers::nested_u64(data, "stats", "sent")),
-        helpers::kv_line("Rate Limited", &helpers::nested_u64(data, "stats", "rate_limited")),
-        helpers::kv_line("Send Failed", &helpers::nested_u64(data, "stats", "send_failed")),
+        helpers::kv_line(
+            "Rate Limited",
+            &helpers::nested_u64(data, "stats", "rate_limited"),
+        ),
+        helpers::kv_line(
+            "Send Failed",
+            &helpers::nested_u64(data, "stats", "send_failed"),
+        ),
         Line::from(""),
         helpers::section_header("Cumulative"),
-        helpers::kv_line("Parent Switches", &helpers::nested_u64(data, "stats", "parent_switches")),
-        helpers::kv_line("Parent Losses", &helpers::nested_u64(data, "stats", "parent_losses")),
-        helpers::kv_line("Flap Dampened", &helpers::nested_u64(data, "stats", "flap_dampened")),
+        helpers::kv_line(
+            "Parent Switches",
+            &helpers::nested_u64(data, "stats", "parent_switches"),
+        ),
+        helpers::kv_line(
+            "Parent Losses",
+            &helpers::nested_u64(data, "stats", "parent_losses"),
+        ),
+        helpers::kv_line(
+            "Flap Dampened",
+            &helpers::nested_u64(data, "stats", "flap_dampened"),
+        ),
     ];
 
     // Trim to fit available height
@@ -164,8 +198,7 @@ fn draw_peers(frame: &mut Frame, data: &serde_json::Value, area: Rect) {
     frame.render_widget(block, area);
 
     if peers.is_empty() {
-        let msg =
-            Paragraph::new("  No peers").style(Style::default().fg(Color::DarkGray));
+        let msg = Paragraph::new("  No peers").style(Style::default().fg(Color::DarkGray));
         frame.render_widget(msg, inner);
         return;
     }

src/bloom/tests.rs

@@ -149,8 +149,7 @@ fn test_bloom_filter_from_bytes() {
     let original = BloomFilter::new();
     let bytes = original.as_bytes().to_vec();
 
-    let restored =
-        BloomFilter::from_bytes(bytes, original.hash_count()).unwrap();
+    let restored = BloomFilter::from_bytes(bytes, original.hash_count()).unwrap();
 
     assert_eq!(original, restored);
 }

src/cache/coord_cache.rs

@@ -6,10 +6,10 @@
 
 use std::collections::HashMap;
 
-use super::entry::CacheEntry;
 use super::CacheStats;
-use crate::tree::TreeCoordinate;
+use super::entry::CacheEntry;
 use crate::NodeAddr;
+use crate::tree::TreeCoordinate;
 
 /// Default maximum entries in coordinate cache.
 pub const DEFAULT_COORD_CACHE_SIZE: usize = 50_000;

src/config/peer.rs

@@ -66,7 +66,11 @@ impl PeerAddress {
     }
 
     /// Create a new peer address with priority.
-    pub fn with_priority(transport: impl Into<String>, addr: impl Into<String>, priority: u8) -> Self {
+    pub fn with_priority(
+        transport: impl Into<String>,
+        addr: impl Into<String>,
+        priority: u8,
+    ) -> Self {
         Self {
             transport: transport.into(),
             addr: addr.into(),
@@ -118,7 +122,11 @@ impl Default for PeerConfig {
 
 impl PeerConfig {
     /// Create a new peer config with a single address.
-    pub fn new(npub: impl Into<String>, transport: impl Into<String>, addr: impl Into<String>) -> Self {
+    pub fn new(
+        npub: impl Into<String>,
+        transport: impl Into<String>,
+        addr: impl Into<String>,
+    ) -> Self {
         Self {
             npub: npub.into(),
             alias: None,

src/control/mod.rs

@@ -105,7 +105,10 @@ impl ControlSocket {
         let group_name = CString::new("fips").unwrap();
         let grp = unsafe { libc::getgrnam(group_name.as_ptr()) };
         if grp.is_null() {
-            debug!("'fips' group not found, skipping chown for {}", path.display());
+            debug!(
+                "'fips' group not found, skipping chown for {}",
+                path.display()
+            );
             return;
         }
         let gid = unsafe { (*grp).gr_gid };
@@ -184,9 +187,7 @@ impl ControlSocket {
         .await;
 
         let response = match read_result {
-            Ok(Ok(())) if line.is_empty() => {
-                Response::error("empty request")
-            }
+            Ok(Ok(())) if line.is_empty() => Response::error("empty request"),
             Ok(Ok(())) => {
                 // Parse the request
                 match serde_json::from_str::<Request>(line.trim()) {

src/control/queries.rs

@@ -5,7 +5,7 @@
 
 use crate::identity::encode_npub;
 use crate::node::Node;
-use serde_json::{json, Value};
+use serde_json::{Value, json};
 
 /// Helper: get current Unix time in milliseconds.
 fn now_ms() -> u64 {
@@ -70,113 +70,120 @@ pub fn show_peers(node: &Node) -> Value {
     let parent_id = *tree.my_declaration().parent_id();
     let is_root = tree.is_root();
 
-    let peers: Vec<Value> = node.peers().map(|peer| {
-        let node_addr = *peer.node_addr();
-        let addr_hex = hex::encode(node_addr.as_bytes());
+    let peers: Vec<Value> = node
+        .peers()
+        .map(|peer| {
+            let node_addr = *peer.node_addr();
+            let addr_hex = hex::encode(node_addr.as_bytes());
 
-        // Determine tree relationship
-        let is_parent = !is_root && node_addr == parent_id;
-        let is_child = tree.peer_declaration(&node_addr)
-            .is_some_and(|decl| *decl.parent_id() == my_addr);
+            // Determine tree relationship
+            let is_parent = !is_root && node_addr == parent_id;
+            let is_child = tree
+                .peer_declaration(&node_addr)
+                .is_some_and(|decl| *decl.parent_id() == my_addr);
 
-        let mut peer_json = json!({
-            "node_addr": addr_hex,
-            "npub": peer.npub(),
-            "display_name": node.peer_display_name(&node_addr),
-            "ipv6_addr": format!("{}", peer.address()),
-            "connectivity": format!("{}", peer.connectivity()),
-            "link_id": peer.link_id().as_u64(),
-            "authenticated_at_ms": peer.authenticated_at(),
-            "last_seen_ms": peer.last_seen(),
-            "has_tree_position": peer.has_tree_position(),
-            "has_bloom_filter": peer.filter_sequence() > 0,
-            "filter_sequence": peer.filter_sequence(),
-            "is_parent": is_parent,
-            "is_child": is_child,
-        });
-
-        // Add transport address if available
-        if let Some(addr) = peer.current_addr() {
-            peer_json["transport_addr"] = json!(format!("{}", addr));
-        }
-
-        // Add link info (direction, transport type)
-        let link_id = peer.link_id();
-        if let Some(link) = node.get_link(&link_id) {
-            peer_json["direction"] = json!(format!("{}", link.direction()));
-            let transport_id = link.transport_id();
-            if let Some(handle) = node.get_transport(&transport_id) {
-                peer_json["transport_type"] = json!(handle.transport_type().name);
-            }
-        }
-
-        // Add tree depth if available
-        if let Some(coords) = peer.coords() {
-            peer_json["tree_depth"] = json!(coords.depth());
-        }
-
-        // Add link stats
-        let stats = peer.link_stats();
-        peer_json["stats"] = json!({
-            "packets_sent": stats.packets_sent,
-            "packets_recv": stats.packets_recv,
-            "bytes_sent": stats.bytes_sent,
-            "bytes_recv": stats.bytes_recv,
-        });
-
-        // Add MMP metrics if available
-        if let Some(mmp) = peer.mmp() {
-            let mut mmp_json = json!({
-                "mode": format!("{}", mmp.mode()),
+            let mut peer_json = json!({
+                "node_addr": addr_hex,
+                "npub": peer.npub(),
+                "display_name": node.peer_display_name(&node_addr),
+                "ipv6_addr": format!("{}", peer.address()),
+                "connectivity": format!("{}", peer.connectivity()),
+                "link_id": peer.link_id().as_u64(),
+                "authenticated_at_ms": peer.authenticated_at(),
+                "last_seen_ms": peer.last_seen(),
+                "has_tree_position": peer.has_tree_position(),
+                "has_bloom_filter": peer.filter_sequence() > 0,
+                "filter_sequence": peer.filter_sequence(),
+                "is_parent": is_parent,
+                "is_child": is_child,
             });
-            if let Some(srtt) = mmp.metrics.srtt_ms() {
-                mmp_json["srtt_ms"] = json!(srtt);
-            }
-            mmp_json["loss_rate"] = json!(mmp.metrics.loss_rate());
-            mmp_json["etx"] = json!(mmp.metrics.etx);
-            mmp_json["goodput_bps"] = json!(mmp.metrics.goodput_bps);
-            mmp_json["delivery_ratio_forward"] = json!(mmp.metrics.delivery_ratio_forward);
-            mmp_json["delivery_ratio_reverse"] = json!(mmp.metrics.delivery_ratio_reverse);
-            if let Some(smoothed_loss) = mmp.metrics.smoothed_loss() {
-                mmp_json["smoothed_loss"] = json!(smoothed_loss);
-            }
-            if let Some(smoothed_etx) = mmp.metrics.smoothed_etx() {
-                mmp_json["smoothed_etx"] = json!(smoothed_etx);
-            }
-            if let Some(srtt) = mmp.metrics.srtt_ms()
-                && let Some(setx) = mmp.metrics.smoothed_etx()
-            {
-                mmp_json["lqi"] = json!(setx * (1.0 + srtt / 100.0));
-            }
-            peer_json["mmp"] = mmp_json;
-        }
 
-        peer_json
-    }).collect();
+            // Add transport address if available
+            if let Some(addr) = peer.current_addr() {
+                peer_json["transport_addr"] = json!(format!("{}", addr));
+            }
+
+            // Add link info (direction, transport type)
+            let link_id = peer.link_id();
+            if let Some(link) = node.get_link(&link_id) {
+                peer_json["direction"] = json!(format!("{}", link.direction()));
+                let transport_id = link.transport_id();
+                if let Some(handle) = node.get_transport(&transport_id) {
+                    peer_json["transport_type"] = json!(handle.transport_type().name);
+                }
+            }
+
+            // Add tree depth if available
+            if let Some(coords) = peer.coords() {
+                peer_json["tree_depth"] = json!(coords.depth());
+            }
+
+            // Add link stats
+            let stats = peer.link_stats();
+            peer_json["stats"] = json!({
+                "packets_sent": stats.packets_sent,
+                "packets_recv": stats.packets_recv,
+                "bytes_sent": stats.bytes_sent,
+                "bytes_recv": stats.bytes_recv,
+            });
+
+            // Add MMP metrics if available
+            if let Some(mmp) = peer.mmp() {
+                let mut mmp_json = json!({
+                    "mode": format!("{}", mmp.mode()),
+                });
+                if let Some(srtt) = mmp.metrics.srtt_ms() {
+                    mmp_json["srtt_ms"] = json!(srtt);
+                }
+                mmp_json["loss_rate"] = json!(mmp.metrics.loss_rate());
+                mmp_json["etx"] = json!(mmp.metrics.etx);
+                mmp_json["goodput_bps"] = json!(mmp.metrics.goodput_bps);
+                mmp_json["delivery_ratio_forward"] = json!(mmp.metrics.delivery_ratio_forward);
+                mmp_json["delivery_ratio_reverse"] = json!(mmp.metrics.delivery_ratio_reverse);
+                if let Some(smoothed_loss) = mmp.metrics.smoothed_loss() {
+                    mmp_json["smoothed_loss"] = json!(smoothed_loss);
+                }
+                if let Some(smoothed_etx) = mmp.metrics.smoothed_etx() {
+                    mmp_json["smoothed_etx"] = json!(smoothed_etx);
+                }
+                if let Some(srtt) = mmp.metrics.srtt_ms()
+                    && let Some(setx) = mmp.metrics.smoothed_etx()
+                {
+                    mmp_json["lqi"] = json!(setx * (1.0 + srtt / 100.0));
+                }
+                peer_json["mmp"] = mmp_json;
+            }
+
+            peer_json
+        })
+        .collect();
 
     json!({ "peers": peers })
 }
 
 /// `show_links` — Active links.
 pub fn show_links(node: &Node) -> Value {
-    let links: Vec<Value> = node.links().map(|link| {
-        let stats = link.stats();
-        json!({
-            "link_id": link.link_id().as_u64(),
-            "transport_id": link.transport_id().as_u32(),
-            "remote_addr": format!("{}", link.remote_addr()),
-            "direction": format!("{}", link.direction()),
-            "state": format!("{}", link.state()),
-            "created_at_ms": link.created_at(),
-            "stats": {
-                "packets_sent": stats.packets_sent,
-                "packets_recv": stats.packets_recv,
-                "bytes_sent": stats.bytes_sent,
-                "bytes_recv": stats.bytes_recv,
-                "last_recv_ms": stats.last_recv_ms,
-            },
+    let links: Vec<Value> = node
+        .links()
+        .map(|link| {
+            let stats = link.stats();
+            json!({
+                "link_id": link.link_id().as_u64(),
+                "transport_id": link.transport_id().as_u32(),
+                "remote_addr": format!("{}", link.remote_addr()),
+                "direction": format!("{}", link.direction()),
+                "state": format!("{}", link.state()),
+                "created_at_ms": link.created_at(),
+                "stats": {
+                    "packets_sent": stats.packets_sent,
+                    "packets_recv": stats.packets_recv,
+                    "bytes_sent": stats.bytes_sent,
+                    "bytes_recv": stats.bytes_recv,
+                    "last_recv_ms": stats.last_recv_ms,
+                },
+            })
         })
-    }).collect();
+        .collect();
 
     json!({ "links": links })
 }
@@ -188,29 +195,34 @@ pub fn show_tree(node: &Node) -> Value {
     let decl = tree.my_declaration();
 
     // Build coords array as hex strings
-    let coords: Vec<String> = my_coords.entries()
+    let coords: Vec<String> = my_coords
+        .entries()
         .iter()
         .map(|e| hex::encode(e.node_addr.as_bytes()))
         .collect();
 
     // Build peer tree data
-    let peers: Vec<Value> = tree.peer_ids().map(|peer_id| {
-        let mut peer_json = json!({
-            "node_addr": hex::encode(peer_id.as_bytes()),
-            "display_name": node.peer_display_name(peer_id),
-        });
-        if let Some(coords) = tree.peer_coords(peer_id) {
-            let coord_path: Vec<String> = coords.entries()
-                .iter()
-                .map(|e| hex::encode(e.node_addr.as_bytes()))
-                .collect();
-            peer_json["depth"] = json!(coords.depth());
-            peer_json["root"] = json!(hex::encode(coords.root_id().as_bytes()));
-            peer_json["coords"] = json!(coord_path);
-            peer_json["distance_to_us"] = json!(my_coords.distance_to(coords));
-        }
-        peer_json
-    }).collect();
+    let peers: Vec<Value> = tree
+        .peer_ids()
+        .map(|peer_id| {
+            let mut peer_json = json!({
+                "node_addr": hex::encode(peer_id.as_bytes()),
+                "display_name": node.peer_display_name(peer_id),
+            });
+            if let Some(coords) = tree.peer_coords(peer_id) {
+                let coord_path: Vec<String> = coords
+                    .entries()
+                    .iter()
+                    .map(|e| hex::encode(e.node_addr.as_bytes()))
+                    .collect();
+                peer_json["depth"] = json!(coords.depth());
+                peer_json["root"] = json!(hex::encode(coords.root_id().as_bytes()));
+                peer_json["coords"] = json!(coord_path);
+                peer_json["distance_to_us"] = json!(my_coords.distance_to(coords));
+            }
+            peer_json
+        })
+        .collect();
 
     // Determine parent display name
     let parent_addr = my_coords.parent_id();
@@ -237,68 +249,71 @@ pub fn show_tree(node: &Node) -> Value {
 
 /// `show_sessions` — End-to-end sessions.
 pub fn show_sessions(node: &Node) -> Value {
-    let sessions: Vec<Value> = node.session_entries().map(|(addr, entry)| {
-        let state_str = if entry.is_established() {
-            "established"
-        } else if entry.is_initiating() {
-            "initiating"
-        } else if entry.is_awaiting_msg3() {
-            "awaiting_msg3"
-        } else {
-            "unknown"
-        };
+    let sessions: Vec<Value> = node
+        .session_entries()
+        .map(|(addr, entry)| {
+            let state_str = if entry.is_established() {
+                "established"
+            } else if entry.is_initiating() {
+                "initiating"
+            } else if entry.is_awaiting_msg3() {
+                "awaiting_msg3"
+            } else {
+                "unknown"
+            };
 
-        let mut session_json = json!({
-            "remote_addr": hex::encode(addr.as_bytes()),
-            "display_name": node.peer_display_name(addr),
-            "state": state_str,
-            "is_initiator": entry.is_initiator(),
-            "last_activity_ms": entry.last_activity(),
-        });
-
-        // Derive npub from session's remote public key
-        let (xonly, _parity) = entry.remote_pubkey().x_only_public_key();
-        session_json["npub"] = json!(encode_npub(&xonly));
-
-        // Traffic counters
-        let (pkts_tx, pkts_rx, bytes_tx, bytes_rx) = entry.traffic_counters();
-        session_json["stats"] = json!({
-            "packets_sent": pkts_tx,
-            "packets_recv": pkts_rx,
-            "bytes_sent": bytes_tx,
-            "bytes_recv": bytes_rx,
-        });
-
-        // Add session MMP if available
-        if let Some(mmp) = entry.mmp() {
-            let mut mmp_json = json!({
-                "mode": format!("{}", mmp.mode()),
-                "loss_rate": mmp.metrics.loss_rate(),
-                "etx": mmp.metrics.etx,
-                "goodput_bps": mmp.metrics.goodput_bps,
-                "delivery_ratio_forward": mmp.metrics.delivery_ratio_forward,
-                "delivery_ratio_reverse": mmp.metrics.delivery_ratio_reverse,
-                "path_mtu": mmp.path_mtu.current_mtu(),
+            let mut session_json = json!({
+                "remote_addr": hex::encode(addr.as_bytes()),
+                "display_name": node.peer_display_name(addr),
+                "state": state_str,
+                "is_initiator": entry.is_initiator(),
+                "last_activity_ms": entry.last_activity(),
             });
-            if let Some(srtt) = mmp.metrics.srtt_ms() {
-                mmp_json["srtt_ms"] = json!(srtt);
-            }
-            if let Some(smoothed_loss) = mmp.metrics.smoothed_loss() {
-                mmp_json["smoothed_loss"] = json!(smoothed_loss);
-            }
-            if let Some(smoothed_etx) = mmp.metrics.smoothed_etx() {
-                mmp_json["smoothed_etx"] = json!(smoothed_etx);
-            }
-            if let Some(srtt) = mmp.metrics.srtt_ms()
-                && let Some(setx) = mmp.metrics.smoothed_etx()
-            {
-                mmp_json["sqi"] = json!(setx * (1.0 + srtt / 100.0));
-            }
-            session_json["mmp"] = mmp_json;
-        }
 
-        session_json
-    }).collect();
+            // Derive npub from session's remote public key
+            let (xonly, _parity) = entry.remote_pubkey().x_only_public_key();
+            session_json["npub"] = json!(encode_npub(&xonly));
+
+            // Traffic counters
+            let (pkts_tx, pkts_rx, bytes_tx, bytes_rx) = entry.traffic_counters();
+            session_json["stats"] = json!({
+                "packets_sent": pkts_tx,
+                "packets_recv": pkts_rx,
+                "bytes_sent": bytes_tx,
+                "bytes_recv": bytes_rx,
+            });
+
+            // Add session MMP if available
+            if let Some(mmp) = entry.mmp() {
+                let mut mmp_json = json!({
+                    "mode": format!("{}", mmp.mode()),
+                    "loss_rate": mmp.metrics.loss_rate(),
+                    "etx": mmp.metrics.etx,
+                    "goodput_bps": mmp.metrics.goodput_bps,
+                    "delivery_ratio_forward": mmp.metrics.delivery_ratio_forward,
+                    "delivery_ratio_reverse": mmp.metrics.delivery_ratio_reverse,
+                    "path_mtu": mmp.path_mtu.current_mtu(),
+                });
+                if let Some(srtt) = mmp.metrics.srtt_ms() {
+                    mmp_json["srtt_ms"] = json!(srtt);
+                }
+                if let Some(smoothed_loss) = mmp.metrics.smoothed_loss() {
+                    mmp_json["smoothed_loss"] = json!(smoothed_loss);
+                }
+                if let Some(smoothed_etx) = mmp.metrics.smoothed_etx() {
+                    mmp_json["smoothed_etx"] = json!(smoothed_etx);
+                }
+                if let Some(srtt) = mmp.metrics.srtt_ms()
+                    && let Some(setx) = mmp.metrics.smoothed_etx()
+                {
+                    mmp_json["sqi"] = json!(setx * (1.0 + srtt / 100.0));
+                }
+                session_json["mmp"] = mmp_json;
+            }
+
+            session_json
+        })
+        .collect();
 
     json!({ "sessions": sessions })
 }
@@ -307,27 +322,31 @@ pub fn show_sessions(node: &Node) -> Value {
 pub fn show_bloom(node: &Node) -> Value {
     let bloom = node.bloom_state();
 
-    let leaf_deps: Vec<String> = bloom.leaf_dependents()
+    let leaf_deps: Vec<String> = bloom
+        .leaf_dependents()
         .iter()
         .map(|addr| hex::encode(addr.as_bytes()))
         .collect();
 
     // Build per-peer filter info
-    let peer_filters: Vec<Value> = node.peers().map(|peer| {
-        let addr = *peer.node_addr();
-        let mut pf = json!({
-            "peer": hex::encode(addr.as_bytes()),
-            "display_name": node.peer_display_name(&addr),
-            "has_filter": peer.filter_sequence() > 0,
-            "filter_sequence": peer.filter_sequence(),
-        });
-        if let Some(filter) = peer.inbound_filter() {
-            pf["estimated_count"] = json!(filter.estimated_count());
-            pf["set_bits"] = json!(filter.count_ones());
-            pf["fill_ratio"] = json!(filter.fill_ratio());
-        }
-        pf
-    }).collect();
+    let peer_filters: Vec<Value> = node
+        .peers()
+        .map(|peer| {
+            let addr = *peer.node_addr();
+            let mut pf = json!({
+                "peer": hex::encode(addr.as_bytes()),
+                "display_name": node.peer_display_name(&addr),
+                "has_filter": peer.filter_sequence() > 0,
+                "filter_sequence": peer.filter_sequence(),
+            });
+            if let Some(filter) = peer.inbound_filter() {
+                pf["estimated_count"] = json!(filter.estimated_count());
+                pf["set_bits"] = json!(filter.count_ones());
+                pf["fill_ratio"] = json!(filter.fill_ratio());
+            }
+            pf
+        })
+        .collect();
 
     let bloom_stats = node.stats().snapshot().bloom;
 
@@ -397,36 +416,39 @@ pub fn show_mmp(node: &Node) -> Value {
     }).collect();
 
     // Session-layer MMP
-    let sessions: Vec<Value> = node.session_entries().filter_map(|(addr, entry)| {
-        let mmp = entry.mmp()?;
-        let metrics = &mmp.metrics;
+    let sessions: Vec<Value> = node
+        .session_entries()
+        .filter_map(|(addr, entry)| {
+            let mmp = entry.mmp()?;
+            let metrics = &mmp.metrics;
 
-        let mut session_layer = json!({
-            "loss_rate": metrics.loss_rate(),
-            "etx": metrics.etx,
-            "path_mtu": mmp.path_mtu.current_mtu(),
-        });
+            let mut session_layer = json!({
+                "loss_rate": metrics.loss_rate(),
+                "etx": metrics.etx,
+                "path_mtu": mmp.path_mtu.current_mtu(),
+            });
 
-        if let Some(smoothed_loss) = metrics.smoothed_loss() {
-            session_layer["smoothed_loss"] = json!(smoothed_loss);
-        }
-        if let Some(smoothed_etx) = metrics.smoothed_etx() {
-            session_layer["smoothed_etx"] = json!(smoothed_etx);
-        }
-        if let Some(srtt) = metrics.srtt_ms() {
-            session_layer["srtt_ms"] = json!(srtt);
-            if let Some(setx) = metrics.smoothed_etx() {
-                session_layer["sqi"] = json!(setx * (1.0 + srtt / 100.0));
+            if let Some(smoothed_loss) = metrics.smoothed_loss() {
+                session_layer["smoothed_loss"] = json!(smoothed_loss);
+            }
+            if let Some(smoothed_etx) = metrics.smoothed_etx() {
+                session_layer["smoothed_etx"] = json!(smoothed_etx);
+            }
+            if let Some(srtt) = metrics.srtt_ms() {
+                session_layer["srtt_ms"] = json!(srtt);
+                if let Some(setx) = metrics.smoothed_etx() {
+                    session_layer["sqi"] = json!(setx * (1.0 + srtt / 100.0));
+                }
             }
-        }
 
-        Some(json!({
-            "remote": hex::encode(addr.as_bytes()),
-            "display_name": node.peer_display_name(addr),
-            "mode": format!("{}", mmp.mode()),
-            "session_layer": session_layer,
-        }))
-    }).collect();
+            Some(json!({
+                "remote": hex::encode(addr.as_bytes()),
+                "display_name": node.peer_display_name(addr),
+                "mode": format!("{}", mmp.mode()),
+                "session_layer": session_layer,
+            }))
+        })
+        .collect();
 
     json!({
         "peers": peers,
@@ -452,60 +474,65 @@ pub fn show_cache(node: &Node) -> Value {
 /// `show_connections` — Pending handshakes.
 pub fn show_connections(node: &Node) -> Value {
     let now = now_ms();
-    let connections: Vec<Value> = node.connections().map(|conn| {
-        let mut conn_json = json!({
-            "link_id": conn.link_id().as_u64(),
-            "direction": format!("{}", conn.direction()),
-            "handshake_state": format!("{}", conn.handshake_state()),
-            "started_at_ms": conn.started_at(),
-            "idle_ms": now.saturating_sub(conn.last_activity()),
-            "resend_count": conn.resend_count(),
-        });
+    let connections: Vec<Value> = node
+        .connections()
+        .map(|conn| {
+            let mut conn_json = json!({
+                "link_id": conn.link_id().as_u64(),
+                "direction": format!("{}", conn.direction()),
+                "handshake_state": format!("{}", conn.handshake_state()),
+                "started_at_ms": conn.started_at(),
+                "idle_ms": now.saturating_sub(conn.last_activity()),
+                "resend_count": conn.resend_count(),
+            });
 
-        if let Some(identity) = conn.expected_identity() {
-            conn_json["expected_peer"] = json!(identity.npub());
-        }
+            if let Some(identity) = conn.expected_identity() {
+                conn_json["expected_peer"] = json!(identity.npub());
+            }
 
-        conn_json
-    }).collect();
+            conn_json
+        })
+        .collect();
 
     json!({ "connections": connections })
 }
 
 /// `show_transports` — Transport instances.
 pub fn show_transports(node: &Node) -> Value {
-    let transports: Vec<Value> = node.transport_ids().map(|id| {
-        let handle = node.get_transport(id).unwrap();
-        let mut t_json = json!({
-            "transport_id": id.as_u32(),
-            "type": handle.transport_type().name,
-            "state": format!("{}", handle.state()),
-            "mtu": handle.mtu(),
-        });
+    let transports: Vec<Value> = node
+        .transport_ids()
+        .map(|id| {
+            let handle = node.get_transport(id).unwrap();
+            let mut t_json = json!({
+                "transport_id": id.as_u32(),
+                "type": handle.transport_type().name,
+                "state": format!("{}", handle.state()),
+                "mtu": handle.mtu(),
+            });
 
-        if let Some(name) = handle.name() {
-            t_json["name"] = json!(name);
-        }
-        if let Some(addr) = handle.local_addr() {
-            t_json["local_addr"] = json!(format!("{}", addr));
-        }
+            if let Some(name) = handle.name() {
+                t_json["name"] = json!(name);
+            }
+            if let Some(addr) = handle.local_addr() {
+                t_json["local_addr"] = json!(format!("{}", addr));
+            }
 
-        // Tor-specific fields
-        if let Some(mode) = handle.tor_mode() {
-            t_json["tor_mode"] = json!(mode);
-        }
-        if let Some(onion) = handle.onion_address() {
-            t_json["onion_address"] = json!(onion);
-        }
-        if let Some(monitoring) = handle.tor_monitoring() {
-            t_json["tor_monitoring"] =
-                serde_json::to_value(&monitoring).unwrap_or_default();
-        }
+            // Tor-specific fields
+            if let Some(mode) = handle.tor_mode() {
+                t_json["tor_mode"] = json!(mode);
+            }
+            if let Some(onion) = handle.onion_address() {
+                t_json["onion_address"] = json!(onion);
+            }
+            if let Some(monitoring) = handle.tor_monitoring() {
+                t_json["tor_monitoring"] = serde_json::to_value(&monitoring).unwrap_or_default();
+            }
 
-        t_json["stats"] = handle.transport_stats();
+            t_json["stats"] = handle.transport_stats();
 
-        t_json
-    }).collect();
+            t_json
+        })
+        .collect();
 
     json!({ "transports": transports })
 }

src/identity/address.rs

@@ -3,7 +3,7 @@
 use std::fmt;
 use std::net::Ipv6Addr;
 
-use super::{IdentityError, NodeAddr, FIPS_ADDRESS_PREFIX};
+use super::{FIPS_ADDRESS_PREFIX, IdentityError, NodeAddr};
 
 /// 128-bit FIPS address with IPv6-compatible format.
 ///

src/identity/local.rs

@@ -3,9 +3,9 @@
 use secp256k1::{Keypair, PublicKey, Secp256k1, SecretKey, XOnlyPublicKey};
 use std::fmt;
 
-use super::auth::{auth_challenge_digest, AuthResponse};
+use super::auth::{AuthResponse, auth_challenge_digest};
 use super::encoding::{decode_secret, encode_npub};
-use super::{sha256, FipsAddress, IdentityError, NodeAddr};
+use super::{FipsAddress, IdentityError, NodeAddr, sha256};
 
 /// A FIPS node identity consisting of a keypair and derived identifiers.
 ///
@@ -22,8 +22,8 @@ impl Identity {
     pub fn generate() -> Self {
         let mut secret_bytes = [0u8; 32];
         rand::Rng::fill_bytes(&mut rand::rng(), &mut secret_bytes);
-        let secret_key = SecretKey::from_slice(&secret_bytes)
-            .expect("32 random bytes is a valid secret key");
+        let secret_key =
+            SecretKey::from_slice(&secret_bytes).expect("32 random bytes is a valid secret key");
         Self::from_secret_key(secret_key)
     }
 

src/identity/node_addr.rs

@@ -4,7 +4,7 @@ use secp256k1::XOnlyPublicKey;
 use sha2::{Digest, Sha256};
 use std::fmt;
 
-use super::{hex_encode, IdentityError};
+use super::{IdentityError, hex_encode};
 
 /// 16-byte node identifier derived from truncated SHA-256(pubkey).
 ///

src/identity/peer.rs

@@ -4,7 +4,7 @@ use secp256k1::{Parity, PublicKey, Secp256k1, XOnlyPublicKey};
 use std::fmt;
 
 use super::encoding::{decode_npub, encode_npub};
-use super::{sha256, FipsAddress, IdentityError, NodeAddr};
+use super::{FipsAddress, IdentityError, NodeAddr, sha256};
 
 /// A known peer's identity (public key only, no signing capability).
 ///
@@ -99,7 +99,8 @@ impl PeerIdentity {
     pub fn verify(&self, data: &[u8], signature: &secp256k1::schnorr::Signature) -> bool {
         let secp = Secp256k1::new();
         let digest = sha256(data);
-        secp.verify_schnorr(signature, &digest, &self.pubkey).is_ok()
+        secp.verify_schnorr(signature, &digest, &self.pubkey)
+            .is_ok()
     }
 }
 

src/identity/tests.rs

@@ -110,9 +110,9 @@ fn test_node_addr_ordering() {
 fn test_identity_from_secret_bytes() {
     // A known secret key (32 bytes)
     let secret_bytes: [u8; 32] = [
-        0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e,
-        0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c,
-        0x1d, 0x1e, 0x1f, 0x20,
+        0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
+        0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e,
+        0x1f, 0x20,
     ];
 
     let identity1 = Identity::from_secret_bytes(&secret_bytes).unwrap();
@@ -163,9 +163,10 @@ fn test_identity_sign() {
     // Verify the signature manually
     let secp = secp256k1::Secp256k1::new();
     let digest = super::sha256(data);
-    assert!(secp
-        .verify_schnorr(&sig, &digest, &identity.pubkey())
-        .is_ok());
+    assert!(
+        secp.verify_schnorr(&sig, &digest, &identity.pubkey())
+            .is_ok()
+    );
 }
 
 #[test]
@@ -193,9 +194,9 @@ fn test_npub_roundtrip() {
 fn test_npub_known_vector() {
     // Test against a known npub (from NIP-19 test vectors or generated externally)
     let secret_bytes: [u8; 32] = [
-        0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e,
-        0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c,
-        0x1d, 0x1e, 0x1f, 0x20,
+        0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
+        0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e,
+        0x1f, 0x20,
     ];
 
     let identity = Identity::from_secret_bytes(&secret_bytes).unwrap();
@@ -274,9 +275,9 @@ fn test_peer_identity_display() {
 #[test]
 fn test_nsec_roundtrip() {
     let secret_bytes: [u8; 32] = [
-        0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e,
-        0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c,
-        0x1d, 0x1e, 0x1f, 0x20,
+        0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
+        0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e,
+        0x1f, 0x20,
     ];
 
     let secret_key = SecretKey::from_slice(&secret_bytes).unwrap();
@@ -301,9 +302,9 @@ fn test_decode_nsec_invalid_prefix() {
 #[test]
 fn test_decode_secret_nsec() {
     let secret_bytes: [u8; 32] = [
-        0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e,
-        0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c,
-        0x1d, 0x1e, 0x1f, 0x20,
+        0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
+        0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e,
+        0x1f, 0x20,
     ];
 
     let secret_key = SecretKey::from_slice(&secret_bytes).unwrap();
@@ -319,9 +320,9 @@ fn test_decode_secret_hex() {
     let decoded = decode_secret(hex_str).unwrap();
 
     let expected: [u8; 32] = [
-        0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e,
-        0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c,
-        0x1d, 0x1e, 0x1f, 0x20,
+        0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
+        0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e,
+        0x1f, 0x20,
     ];
     assert_eq!(decoded.secret_bytes(), expected);
 }
@@ -329,9 +330,9 @@ fn test_decode_secret_hex() {
 #[test]
 fn test_identity_from_secret_str_nsec() {
     let secret_bytes: [u8; 32] = [
-        0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e,
-        0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c,
-        0x1d, 0x1e, 0x1f, 0x20,
+        0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
+        0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e,
+        0x1f, 0x20,
     ];
 
     let secret_key = SecretKey::from_slice(&secret_bytes).unwrap();
@@ -347,9 +348,9 @@ fn test_identity_from_secret_str_nsec() {
 fn test_identity_from_secret_str_hex() {
     let hex_str = "0102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f20";
     let secret_bytes: [u8; 32] = [
-        0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e,
-        0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c,
-        0x1d, 0x1e, 0x1f, 0x20,
+        0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
+        0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e,
+        0x1f, 0x20,
     ];
 
     let identity = Identity::from_secret_str(hex_str).unwrap();
@@ -379,11 +380,8 @@ fn test_hex_conversion_case2() {
 #[test]
 fn test_decode_npub_invalid_length() {
     // Encode 16 bytes (too short) as bech32 with npub prefix
-    let short = bech32::encode::<bech32::Bech32>(
-        bech32::Hrp::parse_unchecked("npub"),
-        &[0u8; 16],
-    )
-    .unwrap();
+    let short =
+        bech32::encode::<bech32::Bech32>(bech32::Hrp::parse_unchecked("npub"), &[0u8; 16]).unwrap();
     let result = decode_npub(&short);
     assert!(matches!(result, Err(IdentityError::InvalidNpubLength(16))));
 }
@@ -391,11 +389,8 @@ fn test_decode_npub_invalid_length() {
 #[test]
 fn test_decode_nsec_invalid_length() {
     // Encode 16 bytes (too short) as bech32 with nsec prefix
-    let short = bech32::encode::<bech32::Bech32>(
-        bech32::Hrp::parse_unchecked("nsec"),
-        &[0u8; 16],
-    )
-    .unwrap();
+    let short =
+        bech32::encode::<bech32::Bech32>(bech32::Hrp::parse_unchecked("nsec"), &[0u8; 16]).unwrap();
     let result = decode_nsec(&short);
     assert!(matches!(result, Err(IdentityError::InvalidNsecLength(16))));
 }
@@ -418,8 +413,8 @@ fn test_decode_secret_hex_invalid_chars() {
 #[test]
 fn test_node_addr_debug() {
     let bytes = [
-        0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-        0x00, 0x00,
+        0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        0x00,
     ];
     let node_addr = NodeAddr::from_bytes(bytes);
     let debug = format!("{:?}", node_addr);
@@ -429,8 +424,8 @@ fn test_node_addr_debug() {
 #[test]
 fn test_node_addr_display() {
     let bytes = [
-        0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef, 0xfe, 0xdc, 0xba, 0x98, 0x76, 0x54,
-        0x32, 0x10,
+        0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef, 0xfe, 0xdc, 0xba, 0x98, 0x76, 0x54, 0x32,
+        0x10,
     ];
     let node_addr = NodeAddr::from_bytes(bytes);
     let display = format!("{}", node_addr);
@@ -587,9 +582,9 @@ fn test_peer_identity_pubkey_full_preserved_parity() {
     // Create two identities and find one with odd parity to make this test meaningful
     let secp = Secp256k1::new();
     let secret_bytes: [u8; 32] = [
-        0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e,
-        0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c,
-        0x1d, 0x1e, 0x1f, 0x20,
+        0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
+        0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e,
+        0x1f, 0x20,
     ];
     let keypair = Keypair::from_seckey_slice(&secp, &secret_bytes).unwrap();
     let full_pubkey = keypair.public_key();

src/lib.rs

@@ -3,7 +3,6 @@
 //! A distributed, decentralized network routing protocol for mesh nodes
 //! connecting over arbitrary transports.
 
-pub mod version;
 pub mod bloom;
 pub mod cache;
 pub mod config;
@@ -12,19 +11,20 @@ pub mod control;
 pub mod gateway;
 pub mod identity;
 pub mod mmp;
-pub mod noise;
-pub mod utils;
 pub mod node;
+pub mod noise;
 pub mod peer;
 pub mod protocol;
 pub mod transport;
 pub mod tree;
 pub mod upper;
+pub mod utils;
+pub mod version;
 
 // Re-export identity types
 pub use identity::{
-    decode_npub, decode_nsec, decode_secret, encode_npub, encode_nsec, AuthChallenge, AuthResponse,
-    FipsAddress, Identity, IdentityError, NodeAddr, PeerIdentity,
+    AuthChallenge, AuthResponse, FipsAddress, Identity, IdentityError, NodeAddr, PeerIdentity,
+    decode_npub, decode_nsec, decode_secret, encode_npub, encode_nsec,
 };
 
 // Re-export config types
@@ -38,18 +38,18 @@ pub use tree::{CoordEntry, ParentDeclaration, TreeCoordinate, TreeError, TreeSta
 pub use bloom::{BloomError, BloomFilter, BloomState};
 
 // Re-export transport types
-pub use transport::{
-    packet_channel, DiscoveredPeer, Link, LinkDirection, LinkId, LinkState, LinkStats, PacketRx,
-    PacketTx, ReceivedPacket, Transport, TransportAddr, TransportError, TransportHandle,
-    TransportId, TransportState, TransportType,
-};
 pub use transport::udp::UdpTransport;
+pub use transport::{
+    DiscoveredPeer, Link, LinkDirection, LinkId, LinkState, LinkStats, PacketRx, PacketTx,
+    ReceivedPacket, Transport, TransportAddr, TransportError, TransportHandle, TransportId,
+    TransportState, TransportType, packet_channel,
+};
 
 // Re-export protocol types
 pub use protocol::{
-    CoordsRequired, FilterAnnounce, HandshakeMessageType, LinkMessageType,
-    LookupRequest, LookupResponse, PathBroken, ProtocolError, SessionAck, SessionDatagram,
-    SessionFlags, SessionMessageType, SessionSetup, TreeAnnounce,
+    CoordsRequired, FilterAnnounce, HandshakeMessageType, LinkMessageType, LookupRequest,
+    LookupResponse, PathBroken, ProtocolError, SessionAck, SessionDatagram, SessionFlags,
+    SessionMessageType, SessionSetup, TreeAnnounce,
 };
 
 // Re-export cache types
@@ -57,10 +57,9 @@ pub use cache::{CacheEntry, CacheError, CacheStats, CoordCache};
 
 // Re-export peer types
 pub use peer::{
-    cross_connection_winner, ActivePeer, ConnectivityState, HandshakeState, PeerConnection,
-    PeerError, PeerSlot, PromotionResult,
+    ActivePeer, ConnectivityState, HandshakeState, PeerConnection, PeerError, PeerSlot,
+    PromotionResult, cross_connection_winner,
 };
 
 // Re-export node types
 pub use node::{Node, NodeError, NodeState};
-

src/mmp/algorithms.rs

@@ -371,7 +371,10 @@ mod tests {
         }
         // Should converge near 1000µs
         let jitter = j.jitter_us();
-        assert!(jitter > 900 && jitter < 1100, "jitter={jitter}, expected ~1000");
+        assert!(
+            jitter > 900 && jitter < 1100,
+            "jitter={jitter}, expected ~1000"
+        );
     }
 
     #[test]
@@ -391,10 +394,7 @@ mod tests {
             s.update(50_000);
         }
         let srtt = s.srtt_us();
-        assert!(
-            (srtt - 50_000).abs() < 1000,
-            "srtt={srtt}, expected ~50000"
-        );
+        assert!((srtt - 50_000).abs() < 1000, "srtt={srtt}, expected ~50000");
     }
 
     #[test]
@@ -417,7 +417,12 @@ mod tests {
             e.update(100.0);
         }
         // Short should be closer to 100 than long
-        assert!(e.short() > e.long(), "short={} long={}", e.short(), e.long());
+        assert!(
+            e.short() > e.long(),
+            "short={} long={}",
+            e.short(),
+            e.long()
+        );
     }
 
     #[test]
@@ -437,7 +442,10 @@ mod tests {
             d.push(i, 5000 + (i as i64) * 100); // increasing by 100µs per packet
         }
         let trend = d.trend_us_per_sec();
-        assert!(trend > 0, "increasing OWD should have positive trend, got {trend}");
+        assert!(
+            trend > 0,
+            "increasing OWD should have positive trend, got {trend}"
+        );
     }
 
     #[test]

src/mmp/metrics.rs

@@ -110,7 +110,12 @@ impl MmpMetrics {
     ///
     /// Returns `true` if this report produced the first SRTT measurement
     /// (transition from uninitialized to initialized).
-    pub fn process_receiver_report(&mut self, rr: &ReceiverReport, our_timestamp_ms: u32, now: Instant) -> bool {
+    pub fn process_receiver_report(
+        &mut self,
+        rr: &ReceiverReport,
+        our_timestamp_ms: u32,
+        now: Instant,
+    ) -> bool {
         let had_srtt = self.srtt.initialized();
 
         // --- RTT from timestamp echo ---
@@ -138,8 +143,12 @@ impl MmpMetrics {
         // --- Loss rate from cumulative counters ---
         // Delta: frames the peer should have received vs. actually received
         if self.has_prev_rr {
-            let counter_span = rr.highest_counter.saturating_sub(self.prev_rr_highest_counter);
-            let packets_delta = rr.cumulative_packets_recv.saturating_sub(self.prev_rr_cum_packets);
+            let counter_span = rr
+                .highest_counter
+                .saturating_sub(self.prev_rr_highest_counter);
+            let packets_delta = rr
+                .cumulative_packets_recv
+                .saturating_sub(self.prev_rr_cum_packets);
 
             if counter_span > 0 {
                 let delivery = (packets_delta as f64) / (counter_span as f64);
@@ -153,7 +162,9 @@ impl MmpMetrics {
 
         // --- Goodput from cumulative bytes + time delta ---
         if self.has_prev_rr {
-            let bytes_delta = rr.cumulative_bytes_recv.saturating_sub(self.prev_rr_cum_bytes);
+            let bytes_delta = rr
+                .cumulative_bytes_recv
+                .saturating_sub(self.prev_rr_cum_bytes);
             self.goodput_trend.update(bytes_delta as f64);
 
             // Compute bytes/sec if we have a time reference
@@ -379,8 +390,16 @@ mod tests {
         // Second report 1s later: 150KB total (100KB delta in 1s = 100KB/s)
         let rr2 = make_rr(300, 290, 150_000, 0, 0, 0);
         m.process_receiver_report(&rr2, 0, t0 + Duration::from_secs(1));
-        assert!(m.goodput_bps() > 90_000.0, "goodput={}, expected ~100000", m.goodput_bps());
-        assert!(m.goodput_bps() < 110_000.0, "goodput={}, expected ~100000", m.goodput_bps());
+        assert!(
+            m.goodput_bps() > 90_000.0,
+            "goodput={}, expected ~100000",
+            m.goodput_bps()
+        );
+        assert!(
+            m.goodput_bps() < 110_000.0,
+            "goodput={}, expected ~100000",
+            m.goodput_bps()
+        );
     }
 
     #[test]
@@ -397,8 +416,11 @@ mod tests {
 
         // Third call: 50% loss (100 frames sent, 50 received)
         m.update_reverse_delivery(350, 400);
-        assert!((m.delivery_ratio_reverse - 0.5).abs() < 0.001,
-            "reverse={}, expected 0.5", m.delivery_ratio_reverse);
+        assert!(
+            (m.delivery_ratio_reverse - 0.5).abs() < 0.001,
+            "reverse={}, expected 0.5",
+            m.delivery_ratio_reverse
+        );
     }
 
     #[test]
@@ -422,7 +444,10 @@ mod tests {
 
         // Second call after rekey: 80% delivery
         m.update_reverse_delivery(90, 100);
-        assert!((m.delivery_ratio_reverse - 0.8).abs() < 0.001,
-            "reverse={}, expected 0.8", m.delivery_ratio_reverse);
+        assert!(
+            (m.delivery_ratio_reverse - 0.8).abs() < 0.001,
+            "reverse={}, expected 0.8",
+            m.delivery_ratio_reverse
+        );
     }
 }

src/node/bloom.rs

@@ -3,9 +3,9 @@
 //! Handles building, sending, and receiving FilterAnnounce messages,
 //! including debounced propagation to peers.
 
+use crate::NodeAddr;
 use crate::bloom::BloomFilter;
 use crate::protocol::FilterAnnounce;
-use crate::NodeAddr;
 
 use super::{Node, NodeError};
 use std::collections::HashMap;

src/node/discovery_rate_limit.rs

@@ -81,11 +81,7 @@ impl DiscoveryBackoff {
     /// window using exponential backoff.
     pub fn record_failure(&mut self, target: &NodeAddr) {
         let now = Instant::now();
-        let failures = self
-            .entries
-            .get(target)
-            .map_or(0, |e| e.failures)
-            + 1;
+        let failures = self.entries.get(target).map_or(0, |e| e.failures) + 1;
 
         let backoff_secs = self
             .base
@@ -345,8 +341,7 @@ mod tests {
 
     #[test]
     fn test_forward_allowed_after_interval() {
-        let mut limiter =
-            DiscoveryForwardRateLimiter::with_interval(Duration::from_millis(100));
+        let mut limiter = DiscoveryForwardRateLimiter::with_interval(Duration::from_millis(100));
         assert!(limiter.should_forward(&addr(1)));
 
         thread::sleep(Duration::from_millis(110));

src/node/handlers/discovery.rs

@@ -20,11 +20,7 @@ impl Node {
     /// 4. Lazy purge expired entries
     /// 5. If we're the target, generate and send response
     /// 6. If TTL > 0, forward to tree peers whose bloom filter matches
-    pub(in crate::node) async fn handle_lookup_request(
-        &mut self,
-        from: &NodeAddr,
-        payload: &[u8],
-    ) {
+    pub(in crate::node) async fn handle_lookup_request(&mut self, from: &NodeAddr, payload: &[u8]) {
         self.stats_mut().discovery.req_received += 1;
 
         let request = match LookupRequest::decode(payload) {
@@ -52,10 +48,8 @@ impl Node {
         }
 
         // Record for reverse-path forwarding and dedup
-        self.recent_requests.insert(
-            request.request_id,
-            RecentRequest::new(*from, now_ms),
-        );
+        self.recent_requests
+            .insert(request.request_id, RecentRequest::new(*from, now_ms));
 
         // Lazy purge expired entries
         self.purge_expired_requests(now_ms);
@@ -76,7 +70,10 @@ impl Node {
         if request.can_forward() {
             // Transit-side rate limit: collapse rapid-fire lookups for the
             // same target from misbehaving nodes generating fresh request_ids.
-            if !self.discovery_forward_limiter.should_forward(&request.target) {
+            if !self
+                .discovery_forward_limiter
+                .should_forward(&request.target)
+            {
                 self.stats_mut().discovery.req_forward_rate_limited += 1;
                 debug!(
                     request_id = request.request_id,
@@ -192,11 +189,8 @@ impl Node {
             // Verify the proof signature
             let (xonly, _parity) = target_pubkey.x_only_public_key();
             let peer_id = PeerIdentity::from_pubkey(xonly);
-            let proof_data = LookupResponse::proof_bytes(
-                response.request_id,
-                &target,
-                &response.target_coords,
-            );
+            let proof_data =
+                LookupResponse::proof_bytes(response.request_id, &target, &response.target_coords);
             if !peer_id.verify(&proof_data, &response.proof) {
                 self.stats_mut().discovery.resp_proof_failed += 1;
                 warn!(
@@ -220,12 +214,8 @@ impl Node {
                 "Discovery succeeded, proof verified, route cached"
             );
 
-            self.coord_cache.insert_with_path_mtu(
-                target,
-                response.target_coords,
-                now_ms,
-                path_mtu,
-            );
+            self.coord_cache
+                .insert_with_path_mtu(target, response.target_coords, now_ms, path_mtu);
 
             // Clean up pending lookup tracking
             self.pending_lookups.remove(&target);
@@ -262,15 +252,11 @@ impl Node {
         let our_coords = self.tree_state().my_coords().clone();
 
         // Sign proof: Identity::sign hashes with SHA-256 internally
-        let proof_data = LookupResponse::proof_bytes(request.request_id, &request.target, &our_coords);
+        let proof_data =
+            LookupResponse::proof_bytes(request.request_id, &request.target, &our_coords);
         let proof = self.identity().sign(&proof_data);
 
-        let response = LookupResponse::new(
-            request.request_id,
-            request.target,
-            our_coords,
-            proof,
-        );
+        let response = LookupResponse::new(request.request_id, request.target, our_coords, proof);
 
         // Route toward origin via reverse path.
         let next_hop_addr = if let Some(recent) = self.recent_requests.get(&request.request_id) {
@@ -297,7 +283,10 @@ impl Node {
         );
 
         let encoded = response.encode();
-        if let Err(e) = self.send_encrypted_link_message(&next_hop_addr, &encoded).await {
+        if let Err(e) = self
+            .send_encrypted_link_message(&next_hop_addr, &encoded)
+            .await
+        {
             debug!(
                 next_hop = %self.peer_display_name(&next_hop_addr),
                 error = %e,
@@ -324,9 +313,7 @@ impl Node {
         let forward_to: Vec<NodeAddr> = self
             .peers
             .iter()
-            .filter(|(addr, peer)| {
-                self.is_tree_peer(addr) && peer.may_reach(&request.target)
-            })
+            .filter(|(addr, peer)| self.is_tree_peer(addr) && peer.may_reach(&request.target))
             .map(|(addr, _)| *addr)
             .collect();
 
@@ -335,9 +322,7 @@ impl Node {
             let fallback: Vec<NodeAddr> = self
                 .peers
                 .iter()
-                .filter(|(addr, peer)| {
-                    !self.is_tree_peer(addr) && peer.may_reach(&request.target)
-                })
+                .filter(|(addr, peer)| !self.is_tree_peer(addr) && peer.may_reach(&request.target))
                 .map(|(addr, _)| *addr)
                 .collect();
             if fallback.is_empty() {
@@ -402,9 +387,7 @@ impl Node {
         let peer_addrs: Vec<NodeAddr> = self
             .peers
             .iter()
-            .filter(|(addr, peer)| {
-                self.is_tree_peer(addr) && peer.may_reach(target)
-            })
+            .filter(|(addr, peer)| self.is_tree_peer(addr) && peer.may_reach(target))
             .map(|(addr, _)| *addr)
             .collect();
 
@@ -488,7 +471,8 @@ impl Node {
             return;
         }
 
-        self.pending_lookups.insert(*dest, PendingLookup::new(now_ms));
+        self.pending_lookups
+            .insert(*dest, PendingLookup::new(now_ms));
         let ttl = self.config.node.discovery.ttl;
         let sent = self.initiate_lookup(dest, ttl).await;
 

src/node/handlers/dispatch.rs

@@ -1,14 +1,19 @@
 //! Link message dispatch and peer removal.
 
-use crate::node::Node;
 use crate::NodeAddr;
+use crate::node::Node;
 use tracing::{debug, info, trace};
 
 impl Node {
     /// Dispatch a decrypted link message to the appropriate handler.
     ///
     /// Link messages are protocol messages exchanged between authenticated peers.
-    pub(in crate::node) async fn dispatch_link_message(&mut self, from: &NodeAddr, plaintext: &[u8], ce_flag: bool) {
+    pub(in crate::node) async fn dispatch_link_message(
+        &mut self,
+        from: &NodeAddr,
+        plaintext: &[u8],
+        ce_flag: bool,
+    ) {
         if plaintext.is_empty() {
             return;
         }
@@ -109,7 +114,9 @@ impl Node {
         }
 
         // MMP teardown log (before we drop the peer)
-        let peer_name = self.peer_aliases.get(node_addr)
+        let peer_name = self
+            .peer_aliases
+            .get(node_addr)
             .cloned()
             .unwrap_or_else(|| peer.identity().short_npub());
         if let Some(mmp) = peer.mmp() {

src/node/handlers/encrypted.rs

@@ -1,8 +1,8 @@
 //! Encrypted frame handling (hot path).
 
-use crate::noise::NoiseError;
 use crate::node::Node;
-use crate::node::wire::{EncryptedHeader, strip_inner_header, FLAG_CE, FLAG_KEY_EPOCH, FLAG_SP};
+use crate::node::wire::{EncryptedHeader, FLAG_CE, FLAG_KEY_EPOCH, FLAG_SP, strip_inner_header};
+use crate::noise::NoiseError;
 use crate::transport::ReceivedPacket;
 use std::time::Instant;
 use tracing::{debug, info, trace, warn};
@@ -53,8 +53,8 @@ impl Node {
         // Check and perform cutover in a scoped borrow.
         {
             let peer = self.peers.get(&node_addr).unwrap();
-            let k_bit_flipped = received_k_bit != peer.current_k_bit()
-                && peer.pending_new_session().is_some();
+            let k_bit_flipped =
+                received_k_bit != peer.current_k_bit() && peer.pending_new_session().is_some();
 
             if k_bit_flipped {
                 let display_name = self.peer_display_name(&node_addr);
@@ -70,9 +70,10 @@ impl Node {
                     debug_assert!(
                         peer.transport_id().is_some()
                             && peer.our_index().is_some()
-                            && self.peers_by_index.contains_key(
-                                &(peer.transport_id().unwrap(), peer.our_index().unwrap().as_u32())
-                            ),
+                            && self.peers_by_index.contains_key(&(
+                                peer.transport_id().unwrap(),
+                                peer.our_index().unwrap().as_u32()
+                            )),
                         "peers_by_index should contain pre-registered new index after K-bit flip"
                     );
                 }
@@ -162,12 +163,14 @@ impl Node {
                 let _spin_rtt = mmp.spin_bit.rx_observe(sp_flag, header.counter, now);
             }
             peer.set_current_addr(packet.transport_id, packet.remote_addr.clone());
-            peer.link_stats_mut().record_recv(packet.data.len(), packet.timestamp_ms);
+            peer.link_stats_mut()
+                .record_recv(packet.data.len(), packet.timestamp_ms);
             peer.touch(packet.timestamp_ms);
         }
 
         // Dispatch to link message handler
-        self.dispatch_link_message(&node_addr, link_message, ce_flag).await;
+        self.dispatch_link_message(&node_addr, link_message, ce_flag)
+            .await;
     }
 
     /// Log a decryption failure with replay suppression.

src/node/handlers/forwarding.rs

@@ -5,15 +5,15 @@
 //! plaintext session-layer headers, routes to the next hop or delivers
 //! locally, and generates error signals on routing failure.
 
-use crate::node::{Node, NodeError};
+use crate::NodeAddr;
 use crate::node::session_wire::{
-    parse_encrypted_coords, FspCommonPrefix, FSP_COMMON_PREFIX_SIZE, FSP_HEADER_SIZE,
-    FSP_PHASE_ESTABLISHED, FSP_PHASE_MSG1, FSP_PHASE_MSG2,
+    FSP_COMMON_PREFIX_SIZE, FSP_HEADER_SIZE, FSP_PHASE_ESTABLISHED, FSP_PHASE_MSG1, FSP_PHASE_MSG2,
+    FspCommonPrefix, parse_encrypted_coords,
 };
+use crate::node::{Node, NodeError};
 use crate::protocol::{
     CoordsRequired, MtuExceeded, PathBroken, SessionAck, SessionDatagram, SessionSetup,
 };
-use crate::NodeAddr;
 use std::time::{Duration, Instant};
 use tracing::{debug, warn};
 
@@ -22,13 +22,20 @@ impl Node {
     ///
     /// Called by `dispatch_link_message` for msg_type 0x00. The payload
     /// has already had its msg_type byte stripped by dispatch.
-    pub(in crate::node) async fn handle_session_datagram(&mut self, _from: &NodeAddr, payload: &[u8], incoming_ce: bool) {
+    pub(in crate::node) async fn handle_session_datagram(
+        &mut self,
+        _from: &NodeAddr,
+        payload: &[u8],
+        incoming_ce: bool,
+    ) {
         self.stats_mut().forwarding.record_received(payload.len());
 
         let mut datagram = match SessionDatagram::decode(payload) {
             Ok(dg) => dg,
             Err(e) => {
-                self.stats_mut().forwarding.record_decode_error(payload.len());
+                self.stats_mut()
+                    .forwarding
+                    .record_decode_error(payload.len());
                 debug!(error = %e, "Malformed SessionDatagram");
                 return;
             }
@@ -36,7 +43,9 @@ impl Node {
 
         // TTL enforcement: decrement and drop if exhausted
         if !datagram.decrement_ttl() {
-            self.stats_mut().forwarding.record_ttl_exhausted(payload.len());
+            self.stats_mut()
+                .forwarding
+                .record_ttl_exhausted(payload.len());
             debug!(
                 src = %datagram.src_addr,
                 dest = %datagram.dest_addr,
@@ -51,8 +60,13 @@ impl Node {
         // Local delivery: dispatch to session layer handlers
         if datagram.dest_addr == *self.node_addr() {
             self.stats_mut().forwarding.record_delivered(payload.len());
-            self.handle_session_payload(&datagram.src_addr, &datagram.payload, datagram.path_mtu, incoming_ce)
-                .await;
+            self.handle_session_payload(
+                &datagram.src_addr,
+                &datagram.payload,
+                datagram.path_mtu,
+                incoming_ce,
+            )
+            .await;
             return;
         }
 
@@ -60,7 +74,9 @@ impl Node {
         let next_hop_addr = match self.find_next_hop(&datagram.dest_addr) {
             Some(peer) => *peer.node_addr(),
             None => {
-                self.stats_mut().forwarding.record_drop_no_route(payload.len());
+                self.stats_mut()
+                    .forwarding
+                    .record_drop_no_route(payload.len());
                 self.send_routing_error(&datagram).await;
                 return;
             }
@@ -84,7 +100,8 @@ impl Node {
         if local_congestion {
             self.stats_mut().congestion.record_congestion_detected();
             let now = Instant::now();
-            let should_log = self.last_congestion_log
+            let should_log = self
+                .last_congestion_log
                 .map(|t| now.duration_since(t) >= Duration::from_secs(5))
                 .unwrap_or(true);
             if should_log {
@@ -101,11 +118,15 @@ impl Node {
         {
             match e {
                 NodeError::MtuExceeded { mtu, .. } => {
-                    self.stats_mut().forwarding.record_drop_mtu_exceeded(payload.len());
+                    self.stats_mut()
+                        .forwarding
+                        .record_drop_mtu_exceeded(payload.len());
                     self.send_mtu_exceeded_error(&datagram, mtu).await;
                 }
                 _ => {
-                    self.stats_mut().forwarding.record_drop_send_error(payload.len());
+                    self.stats_mut()
+                        .forwarding
+                        .record_drop_send_error(payload.len());
                     debug!(
                         next_hop = %next_hop_addr,
                         dest = %datagram.dest_addr,
@@ -146,54 +167,38 @@ impl Node {
             .unwrap_or(0);
 
         match prefix.phase {
-            FSP_PHASE_MSG1 => {
-                match SessionSetup::decode(inner) {
-                    Ok(setup) => {
-                        self.coord_cache_mut().insert(
-                            datagram.src_addr,
-                            setup.src_coords,
-                            now_ms,
-                        );
-                        self.coord_cache_mut().insert(
-                            datagram.dest_addr,
-                            setup.dest_coords,
-                            now_ms,
-                        );
-                        debug!(
-                            src = %datagram.src_addr,
-                            dest = %datagram.dest_addr,
-                            "Cached coords from SessionSetup"
-                        );
-                    }
-                    Err(e) => {
-                        debug!(error = %e, "Failed to decode SessionSetup for cache warming");
-                    }
+            FSP_PHASE_MSG1 => match SessionSetup::decode(inner) {
+                Ok(setup) => {
+                    self.coord_cache_mut()
+                        .insert(datagram.src_addr, setup.src_coords, now_ms);
+                    self.coord_cache_mut()
+                        .insert(datagram.dest_addr, setup.dest_coords, now_ms);
+                    debug!(
+                        src = %datagram.src_addr,
+                        dest = %datagram.dest_addr,
+                        "Cached coords from SessionSetup"
+                    );
                 }
-            }
-            FSP_PHASE_MSG2 => {
-                match SessionAck::decode(inner) {
-                    Ok(ack) => {
-                        self.coord_cache_mut().insert(
-                            datagram.src_addr,
-                            ack.src_coords,
-                            now_ms,
-                        );
-                        self.coord_cache_mut().insert(
-                            datagram.dest_addr,
-                            ack.dest_coords,
-                            now_ms,
-                        );
-                        debug!(
-                            src = %datagram.src_addr,
-                            dest = %datagram.dest_addr,
-                            "Cached coords from SessionAck"
-                        );
-                    }
-                    Err(e) => {
-                        debug!(error = %e, "Failed to decode SessionAck for cache warming");
-                    }
+                Err(e) => {
+                    debug!(error = %e, "Failed to decode SessionSetup for cache warming");
                 }
-            }
+            },
+            FSP_PHASE_MSG2 => match SessionAck::decode(inner) {
+                Ok(ack) => {
+                    self.coord_cache_mut()
+                        .insert(datagram.src_addr, ack.src_coords, now_ms);
+                    self.coord_cache_mut()
+                        .insert(datagram.dest_addr, ack.dest_coords, now_ms);
+                    debug!(
+                        src = %datagram.src_addr,
+                        dest = %datagram.dest_addr,
+                        "Cached coords from SessionAck"
+                    );
+                }
+                Err(e) => {
+                    debug!(error = %e, "Failed to decode SessionAck for cache warming");
+                }
+            },
             FSP_PHASE_ESTABLISHED if prefix.has_coords() => {
                 // CP flag set: coords in cleartext between header and ciphertext.
                 // Parse coords from the cleartext section after the 12-byte header.
@@ -203,18 +208,12 @@ impl Node {
                 match parse_encrypted_coords(coord_data) {
                     Ok((src_coords, dest_coords, _bytes_consumed)) => {
                         if let Some(coords) = src_coords {
-                            self.coord_cache_mut().insert(
-                                datagram.src_addr,
-                                coords,
-                                now_ms,
-                            );
+                            self.coord_cache_mut()
+                                .insert(datagram.src_addr, coords, now_ms);
                         }
                         if let Some(coords) = dest_coords {
-                            self.coord_cache_mut().insert(
-                                datagram.dest_addr,
-                                coords,
-                                now_ms,
-                            );
+                            self.coord_cache_mut()
+                                .insert(datagram.dest_addr, coords, now_ms);
                         }
                         debug!(
                             src = %datagram.src_addr,
@@ -243,7 +242,10 @@ impl Node {
     /// No cascading errors.
     async fn send_routing_error(&mut self, original: &SessionDatagram) {
         // Rate limit: one error signal per destination per 100ms
-        if !self.routing_error_rate_limiter.should_send(&original.dest_addr) {
+        if !self
+            .routing_error_rate_limiter
+            .should_send(&original.dest_addr)
+        {
             return;
         }
 
@@ -303,23 +305,18 @@ impl Node {
     /// Called when `send_encrypted_link_message()` fails with
     /// `NodeError::MtuExceeded` during forwarding. The signal tells the
     /// source the bottleneck MTU so it can immediately reduce its path MTU.
-    async fn send_mtu_exceeded_error(
-        &mut self,
-        original: &SessionDatagram,
-        bottleneck_mtu: u16,
-    ) {
+    async fn send_mtu_exceeded_error(&mut self, original: &SessionDatagram, bottleneck_mtu: u16) {
         // Rate limit: reuse routing_error_rate_limiter keyed on dest_addr
-        if !self.routing_error_rate_limiter.should_send(&original.dest_addr) {
+        if !self
+            .routing_error_rate_limiter
+            .should_send(&original.dest_addr)
+        {
             return;
         }
 
         let my_addr = *self.node_addr();
 
-        let error_payload = MtuExceeded::new(
-            original.dest_addr,
-            my_addr,
-            bottleneck_mtu,
-        ).encode();
+        let error_payload = MtuExceeded::new(original.dest_addr, my_addr, bottleneck_mtu).encode();
 
         let error_dg = SessionDatagram::new(my_addr, original.src_addr, error_payload)
             .with_ttl(self.config.node.session.default_ttl);
@@ -403,7 +400,10 @@ impl Node {
         }
         for tid in new_drop_events {
             self.stats_mut().congestion.record_kernel_drop_event();
-            warn!(transport_id = tid.as_u32(), "Kernel recv drops first observed on transport");
+            warn!(
+                transport_id = tid.as_u32(),
+                "Kernel recv drops first observed on transport"
+            );
         }
     }
 }

src/node/handlers/mmp.rs

@@ -4,6 +4,7 @@
 //! periodic report generation on the tick timer, and emits periodic
 //! and teardown metric logs.
 
+use crate::NodeAddr;
 use crate::mmp::MmpMode;
 use crate::mmp::MmpSessionState;
 use crate::mmp::report::{ReceiverReport, SenderReport};
@@ -12,7 +13,6 @@ use crate::protocol::{
     LinkMessageType, PathMtuNotification, SessionMessageType, SessionReceiverReport,
     SessionSenderReport,
 };
-use crate::NodeAddr;
 use std::time::{Duration, Instant};
 use tracing::{debug, info, trace, warn};
 
@@ -72,7 +72,11 @@ impl Node {
     ///
     /// The peer is telling us about what they received from us. We feed
     /// this to our metrics to compute RTT, loss rate, and trend indicators.
-    pub(in crate::node) async fn handle_receiver_report(&mut self, from: &NodeAddr, payload: &[u8]) {
+    pub(in crate::node) async fn handle_receiver_report(
+        &mut self,
+        from: &NodeAddr,
+        payload: &[u8],
+    ) {
         let rr = match ReceiverReport::decode(payload) {
             Ok(rr) => rr,
             Err(e) => {
@@ -101,7 +105,9 @@ impl Node {
         // Process the report: computes RTT from timestamp echo, updates
         // loss rate, goodput rate, jitter trend, and ETX.
         let now = Instant::now();
-        let first_rtt = mmp.metrics.process_receiver_report(&rr, our_timestamp_ms, now);
+        let first_rtt = mmp
+            .metrics
+            .process_receiver_report(&rr, our_timestamp_ms, now);
 
         // Feed SRTT back to sender/receiver report interval tuning
         if let Some(srtt_ms) = mmp.metrics.srtt_ms() {
@@ -114,7 +120,8 @@ impl Node {
         // (what fraction of peer's frames we received), using per-interval deltas.
         let our_recv_packets = mmp.receiver.cumulative_packets_recv();
         let peer_highest = mmp.receiver.highest_counter();
-        mmp.metrics.update_reverse_delivery(our_recv_packets, peer_highest);
+        mmp.metrics
+            .update_reverse_delivery(our_recv_packets, peer_highest);
 
         trace!(
             from = %peer_name,
@@ -128,7 +135,9 @@ impl Node {
         // Trigger re-evaluation so the node doesn't wait for the next
         // periodic tick or TreeAnnounce.
         if first_rtt {
-            let peer_costs: std::collections::HashMap<crate::NodeAddr, f64> = self.peers.iter()
+            let peer_costs: std::collections::HashMap<crate::NodeAddr, f64> = self
+                .peers
+                .iter()
                 .filter(|(_, p)| p.has_srtt())
                 .map(|(a, p)| (*a, p.link_cost()))
                 .collect();
@@ -179,7 +188,9 @@ impl Node {
 
         for (node_addr, peer) in self.peers.iter_mut() {
             // Compute display name before taking mutable MMP borrow
-            let peer_name = self.peer_aliases.get(node_addr)
+            let peer_name = self
+                .peer_aliases
+                .get(node_addr)
                 .cloned()
                 .unwrap_or_else(|| peer.identity().short_npub());
 
@@ -261,7 +272,7 @@ impl Node {
 
         let rtt_str = match m.srtt_ms() {
             Some(rtt) => format!("{:.1}ms", rtt),
-            None => "n/a".to_string()
+            None => "n/a".to_string(),
         };
         let loss_str = format!("{:.1}%", m.loss_rate() * 100.0);
 
@@ -294,7 +305,9 @@ impl Node {
 
         for (dest_addr, entry) in self.sessions.iter_mut() {
             // Compute display name before taking mutable MMP borrow
-            let session_name = self.peer_aliases.get(dest_addr)
+            let session_name = self
+                .peer_aliases
+                .get(dest_addr)
                 .cloned()
                 .unwrap_or_else(|| {
                     let (xonly, _) = entry.remote_pubkey().x_only_public_key();
@@ -362,7 +375,9 @@ impl Node {
                 }
                 Err(e) => {
                     // Peek at current failure count for log suppression
-                    let failures = self.sessions.get(&dest_addr)
+                    let failures = self
+                        .sessions
+                        .get(&dest_addr)
                         .and_then(|entry| entry.mmp())
                         .map(|mmp| mmp.sender.consecutive_send_failures())
                         .unwrap_or(0);
@@ -541,7 +556,10 @@ impl Node {
             if let Some(peer) = self.peers.get_mut(&addr) {
                 peer.mark_heartbeat_sent(now);
             }
-            if let Err(e) = self.send_encrypted_link_message(&addr, &heartbeat_msg).await {
+            if let Err(e) = self
+                .send_encrypted_link_message(&addr, &heartbeat_msg)
+                .await
+            {
                 trace!(peer = %self.peer_display_name(&addr), error = %e, "Failed to send heartbeat");
             }
         }

src/node/handlers/rx_loop.rs

@@ -1,10 +1,12 @@
 //! RX event loop and packet dispatch.
 
-use crate::control::{commands, ControlSocket};
 use crate::control::queries;
+use crate::control::{ControlSocket, commands};
+use crate::node::wire::{
+    COMMON_PREFIX_SIZE, CommonPrefix, FMP_VERSION, PHASE_ESTABLISHED, PHASE_MSG1, PHASE_MSG2,
+};
 use crate::node::{Node, NodeError};
 use crate::transport::ReceivedPacket;
-use crate::node::wire::{CommonPrefix, PHASE_ESTABLISHED, PHASE_MSG1, PHASE_MSG2, FMP_VERSION, COMMON_PREFIX_SIZE};
 use std::time::Duration;
 use tracing::{debug, info, warn};
 
@@ -29,8 +31,7 @@ impl Node {
     /// This method takes ownership of the packet_rx channel and runs
     /// until the channel is closed (typically when stop() is called).
     pub async fn run_rx_loop(&mut self) -> Result<(), NodeError> {
-        let mut packet_rx = self.packet_rx.take()
-            .ok_or(NodeError::NotStarted)?;
+        let mut packet_rx = self.packet_rx.take().ok_or(NodeError::NotStarted)?;
 
         // Take the TUN outbound receiver, or create a dummy channel that never
         // produces messages (when TUN is disabled). Holding the sender prevents
@@ -53,12 +54,12 @@ impl Node {
             }
         };
 
-        let mut tick = tokio::time::interval(Duration::from_secs(self.config.node.tick_interval_secs));
+        let mut tick =
+            tokio::time::interval(Duration::from_secs(self.config.node.tick_interval_secs));
 
         // Set up control socket channel
-        let (control_tx, mut control_rx) = tokio::sync::mpsc::channel::<
-            crate::control::ControlMessage,
-        >(32);
+        let (control_tx, mut control_rx) =
+            tokio::sync::mpsc::channel::<crate::control::ControlMessage>(32);
 
         if self.config.node.control.enabled {
             let config = self.config.node.control.clone();

src/node/handlers/session.rs

@@ -5,25 +5,27 @@
 //! SessionSetup (Noise XK msg1), SessionAck (msg2), SessionMsg3 (msg3),
 //! encrypted data, and error signals (CoordsRequired, PathBroken).
 
-use crate::node::session::{EndToEndState, SessionEntry};
-use crate::node::session_wire::{
-    build_fsp_header, fsp_prepend_inner_header, fsp_strip_inner_header,
-    parse_encrypted_coords, FspCommonPrefix, FspEncryptedHeader, FSP_COMMON_PREFIX_SIZE,
-    FSP_FLAG_CP, FSP_FLAG_K, FSP_HEADER_SIZE, FSP_PHASE_ESTABLISHED, FSP_PHASE_MSG1,
-    FSP_PHASE_MSG2, FSP_PHASE_MSG3, FSP_PORT_HEADER_SIZE, FSP_PORT_IPV6_SHIM,
-};
-use crate::protocol::{coords_wire_size, encode_coords};
-use crate::upper::icmp::FIPS_OVERHEAD;
-use crate::node::{Node, NodeError};
-use crate::noise::{HandshakeState, XK_HANDSHAKE_MSG1_SIZE, XK_HANDSHAKE_MSG2_SIZE, XK_HANDSHAKE_MSG3_SIZE};
+use crate::NodeAddr;
 use crate::mmp::report::ReceiverReport;
 use crate::mmp::{MAX_SESSION_REPORT_INTERVAL_MS, MIN_SESSION_REPORT_INTERVAL_MS};
+use crate::node::session::{EndToEndState, SessionEntry};
+use crate::node::session_wire::{
+    FSP_COMMON_PREFIX_SIZE, FSP_FLAG_CP, FSP_FLAG_K, FSP_HEADER_SIZE, FSP_PHASE_ESTABLISHED,
+    FSP_PHASE_MSG1, FSP_PHASE_MSG2, FSP_PHASE_MSG3, FSP_PORT_HEADER_SIZE, FSP_PORT_IPV6_SHIM,
+    FspCommonPrefix, FspEncryptedHeader, build_fsp_header, fsp_prepend_inner_header,
+    fsp_strip_inner_header, parse_encrypted_coords,
+};
+use crate::node::{Node, NodeError};
+use crate::noise::{
+    HandshakeState, XK_HANDSHAKE_MSG1_SIZE, XK_HANDSHAKE_MSG2_SIZE, XK_HANDSHAKE_MSG3_SIZE,
+};
 use crate::protocol::{
     CoordsRequired, FspInnerFlags, MtuExceeded, PathBroken, PathMtuNotification, SessionAck,
     SessionDatagram, SessionMessageType, SessionMsg3, SessionReceiverReport, SessionSenderReport,
     SessionSetup,
 };
-use crate::NodeAddr;
+use crate::protocol::{coords_wire_size, encode_coords};
+use crate::upper::icmp::FIPS_OVERHEAD;
 use secp256k1::PublicKey;
 use tracing::{debug, info, trace};
 
@@ -48,7 +50,10 @@ impl Node {
         let prefix = match FspCommonPrefix::parse(payload) {
             Some(p) => p,
             None => {
-                debug!(len = payload.len(), "Session payload too short for FSP prefix");
+                debug!(
+                    len = payload.len(),
+                    "Session payload too short for FSP prefix"
+                );
                 return;
             }
         };
@@ -89,7 +94,8 @@ impl Node {
                 }
             }
             FSP_PHASE_ESTABLISHED => {
-                self.handle_encrypted_session_msg(src_addr, payload, path_mtu, ce_flag).await;
+                self.handle_encrypted_session_msg(src_addr, payload, path_mtu, ce_flag)
+                    .await;
             }
             _ => {
                 debug!(phase = prefix.phase, "Unknown FSP phase");
@@ -106,12 +112,21 @@ impl Node {
     /// 4. AEAD decrypt with AAD = header_bytes
     /// 5. Strip FSP inner header → timestamp, msg_type, inner_flags
     /// 6. Dispatch by msg_type
-    async fn handle_encrypted_session_msg(&mut self, src_addr: &NodeAddr, payload: &[u8], path_mtu: u16, ce_flag: bool) {
+    async fn handle_encrypted_session_msg(
+        &mut self,
+        src_addr: &NodeAddr,
+        payload: &[u8],
+        path_mtu: u16,
+        ce_flag: bool,
+    ) {
         // Parse the 12-byte encrypted header (includes the 4-byte prefix)
         let header = match FspEncryptedHeader::parse(payload) {
             Some(h) => h,
             None => {
-                debug!(len = payload.len(), "Encrypted session message too short for FSP header");
+                debug!(
+                    len = payload.len(),
+                    "Encrypted session message too short for FSP header"
+                );
                 return;
             }
         };
@@ -166,8 +181,8 @@ impl Node {
         let received_k_bit = header.flags & FSP_FLAG_K != 0;
         {
             let entry = self.sessions.get(src_addr).unwrap();
-            let k_bit_flipped = received_k_bit != entry.current_k_bit()
-                && entry.pending_new_session().is_some();
+            let k_bit_flipped =
+                received_k_bit != entry.current_k_bit() && entry.pending_new_session().is_some();
 
             if k_bit_flipped {
                 let display_name = self.peer_display_name(src_addr);
@@ -234,7 +249,8 @@ impl Node {
         self.sessions.insert(*src_addr, entry);
 
         // Strip FSP inner header (6 bytes)
-        let (timestamp, msg_type, inner_flags_byte, rest) = match fsp_strip_inner_header(&plaintext) {
+        let (timestamp, msg_type, inner_flags_byte, rest) = match fsp_strip_inner_header(&plaintext)
+        {
             Some(parts) => parts,
             None => {
                 debug!(src = %self.peer_display_name(src_addr), "Decrypted payload too short for FSP inner header");
@@ -247,16 +263,15 @@ impl Node {
             && let Some(mmp) = entry.mmp_mut()
         {
             let now = std::time::Instant::now();
-            mmp.receiver.record_recv(
-                header.counter, timestamp, plaintext.len(), ce_flag, now,
-            );
+            mmp.receiver
+                .record_recv(header.counter, timestamp, plaintext.len(), ce_flag, now);
             // Spin bit: advance state machine for correct TX reflection.
             // RTT samples not fed into SRTT — timestamp-echo provides
             // accurate RTT; spin bit includes variable inter-frame delays.
             let inner_flags = FspInnerFlags::from_byte(inner_flags_byte);
-            let _spin_rtt = mmp.spin_bit.rx_observe(
-                inner_flags.spin_bit, header.counter, now,
-            );
+            let _spin_rtt = mmp
+                .spin_bit
+                .rx_observe(inner_flags.spin_bit, header.counter, now);
         }
 
         // Feed path_mtu from datagram envelope to MMP path MTU tracking.
@@ -283,9 +298,15 @@ impl Node {
                     FSP_PORT_IPV6_SHIM => {
                         use crate::FipsAddress;
                         let src_ipv6 = FipsAddress::from_node_addr(src_addr).to_ipv6().octets();
-                        let dst_ipv6 = FipsAddress::from_node_addr(self.node_addr()).to_ipv6().octets();
+                        let dst_ipv6 = FipsAddress::from_node_addr(self.node_addr())
+                            .to_ipv6()
+                            .octets();
 
-                        match crate::upper::ipv6_shim::decompress_ipv6(service_payload, src_ipv6, dst_ipv6) {
+                        match crate::upper::ipv6_shim::decompress_ipv6(
+                            service_payload,
+                            src_ipv6,
+                            dst_ipv6,
+                        ) {
                             Some(mut packet) => {
                                 if ce_flag {
                                     mark_ipv6_ecn_ce(&mut packet);
@@ -533,7 +554,13 @@ impl Node {
         let placeholder_pubkey = self.identity.keypair().public_key();
         let now_ms = Self::now_ms();
         let resend_interval = self.config.node.rate_limit.handshake_resend_interval_ms;
-        let mut entry = SessionEntry::new(*src_addr, placeholder_pubkey, EndToEndState::AwaitingMsg3(handshake), now_ms, false);
+        let mut entry = SessionEntry::new(
+            *src_addr,
+            placeholder_pubkey,
+            EndToEndState::AwaitingMsg3(handshake),
+            now_ms,
+            false,
+        );
         entry.set_handshake_payload(ack_payload, now_ms + resend_interval);
         self.sessions.insert(*src_addr, entry);
 
@@ -809,7 +836,13 @@ impl Node {
 
         let now_ms = Self::now_ms();
         // Replace the placeholder pubkey with the real one
-        let mut new_entry = SessionEntry::new(*src_addr, remote_pubkey, EndToEndState::Established(session), now_ms, false);
+        let mut new_entry = SessionEntry::new(
+            *src_addr,
+            remote_pubkey,
+            EndToEndState::Established(session),
+            now_ms,
+            false,
+        );
         new_entry.set_coords_warmup_remaining(self.config.node.session.coords_warmup_packets);
         new_entry.mark_established(now_ms);
         new_entry.init_mmp(&self.config.node.session_mmp);
@@ -878,7 +911,8 @@ impl Node {
         };
 
         let now = std::time::Instant::now();
-        mmp.metrics.process_receiver_report(&rr, our_timestamp_ms, now);
+        mmp.metrics
+            .process_receiver_report(&rr, our_timestamp_ms, now);
 
         // Feed SRTT back to sender/receiver report interval tuning (session-layer bounds)
         if let Some(srtt_ms) = mmp.metrics.srtt_ms() {
@@ -900,7 +934,8 @@ impl Node {
         // Update reverse delivery ratio from our own receiver state, using per-interval deltas.
         let our_recv_packets = mmp.receiver.cumulative_packets_recv();
         let peer_highest = mmp.receiver.highest_counter();
-        mmp.metrics.update_reverse_delivery(our_recv_packets, peer_highest);
+        mmp.metrics
+            .update_reverse_delivery(our_recv_packets, peer_highest);
 
         trace!(
             src = %peer_name,
@@ -975,7 +1010,10 @@ impl Node {
         );
 
         // Send standalone CoordsWarmup immediately (rate-limited)
-        if self.coords_response_rate_limiter.should_send(&msg.dest_addr) {
+        if self
+            .coords_response_rate_limiter
+            .should_send(&msg.dest_addr)
+        {
             if let Some(entry) = self.sessions.get(&msg.dest_addr)
                 && entry.is_established()
                 && let Err(e) = self.send_coords_warmup(&msg.dest_addr).await
@@ -1033,7 +1071,10 @@ impl Node {
         );
 
         // Send standalone CoordsWarmup immediately (rate-limited)
-        if self.coords_response_rate_limiter.should_send(&msg.dest_addr) {
+        if self
+            .coords_response_rate_limiter
+            .should_send(&msg.dest_addr)
+        {
             if let Some(entry) = self.sessions.get(&msg.dest_addr)
                 && entry.is_established()
                 && let Err(e) = self.send_coords_warmup(&msg.dest_addr).await
@@ -1139,16 +1180,17 @@ impl Node {
         let our_keypair = self.identity.keypair();
         let mut handshake = HandshakeState::new_xk_initiator(our_keypair, dest_pubkey);
         handshake.set_local_epoch(self.startup_epoch);
-        let msg1 = handshake.write_xk_message_1().map_err(|e| NodeError::SendFailed {
-            node_addr: dest_addr,
-            reason: format!("Noise XK msg1 generation failed: {}", e),
-        })?;
+        let msg1 = handshake
+            .write_xk_message_1()
+            .map_err(|e| NodeError::SendFailed {
+                node_addr: dest_addr,
+                reason: format!("Noise XK msg1 generation failed: {}", e),
+            })?;
 
         // Build SessionSetup with coordinates
         let our_coords = self.tree_state.my_coords().clone();
         let dest_coords = self.get_dest_coords(&dest_addr);
-        let setup = SessionSetup::new(our_coords, dest_coords)
-            .with_handshake(msg1);
+        let setup = SessionSetup::new(our_coords, dest_coords).with_handshake(msg1);
         let setup_payload = setup.encode();
 
         // Wrap in SessionDatagram
@@ -1165,7 +1207,13 @@ impl Node {
         // Store session entry with handshake payload for potential resend
         let now_ms = Self::now_ms();
         let resend_interval = self.config.node.rate_limit.handshake_resend_interval_ms;
-        let mut entry = SessionEntry::new(dest_addr, dest_pubkey, EndToEndState::Initiating(handshake), now_ms, true);
+        let mut entry = SessionEntry::new(
+            dest_addr,
+            dest_pubkey,
+            EndToEndState::Initiating(handshake),
+            now_ms,
+            true,
+        );
         entry.set_handshake_payload(setup_payload, now_ms + resend_interval);
         self.sessions.insert(dest_addr, entry);
 
@@ -1192,10 +1240,13 @@ impl Node {
         let now_ms = Self::now_ms();
 
         // First borrow: read session metadata (NLL releases before coord decision)
-        let entry = self.sessions.get(dest_addr).ok_or_else(|| NodeError::SendFailed {
-            node_addr: *dest_addr,
-            reason: "no session".into(),
-        })?;
+        let entry = self
+            .sessions
+            .get(dest_addr)
+            .ok_or_else(|| NodeError::SendFailed {
+                node_addr: *dest_addr,
+                reason: "no session".into(),
+            })?;
         let wants_coords = entry.coords_warmup_remaining() > 0;
         let timestamp = entry.session_timestamp(now_ms);
         let spin_bit = entry.mmp().is_some_and(|m| m.spin_bit.tx_bit());
@@ -1215,7 +1266,8 @@ impl Node {
         // Build inner plaintext (doesn't depend on counter)
         let msg_type = SessionMessageType::DataPacket.to_byte(); // 0x10
         let inner_flags = FspInnerFlags { spin_bit }.to_byte();
-        let inner_plaintext = fsp_prepend_inner_header(timestamp, msg_type, inner_flags, &port_payload);
+        let inner_plaintext =
+            fsp_prepend_inner_header(timestamp, msg_type, inner_flags, &port_payload);
 
         // Determine whether coords fit within transport MTU.
         // If not, send standalone CoordsWarmup before the data packet.
@@ -1223,7 +1275,8 @@ impl Node {
             let src = self.tree_state.my_coords().clone();
             let dst = self.get_dest_coords(dest_addr);
             let coords_size = coords_wire_size(&src) + coords_wire_size(&dst);
-            let total_wire = FIPS_OVERHEAD as usize + FSP_PORT_HEADER_SIZE + coords_size + payload.len();
+            let total_wire =
+                FIPS_OVERHEAD as usize + FSP_PORT_HEADER_SIZE + coords_size + payload.len();
             if total_wire <= self.transport_mtu() as usize {
                 (true, Some(src), Some(dst))
             } else {
@@ -1239,9 +1292,7 @@ impl Node {
         };
 
         // Decrement warmup counter if we sent coords (piggybacked or standalone)
-        if wants_coords
-            && let Some(entry) = self.sessions.get_mut(dest_addr)
-        {
+        if wants_coords && let Some(entry) = self.sessions.get_mut(dest_addr) {
             entry.set_coords_warmup_remaining(entry.coords_warmup_remaining() - 1);
         }
 
@@ -1254,10 +1305,13 @@ impl Node {
         }
 
         // Borrow session for counter + encryption (after potential standalone send)
-        let entry = self.sessions.get_mut(dest_addr).ok_or_else(|| NodeError::SendFailed {
-            node_addr: *dest_addr,
-            reason: "no session".into(),
-        })?;
+        let entry = self
+            .sessions
+            .get_mut(dest_addr)
+            .ok_or_else(|| NodeError::SendFailed {
+                node_addr: *dest_addr,
+                reason: "no session".into(),
+            })?;
         let session = match entry.state_mut() {
             EndToEndState::Established(s) => s,
             _ => {
@@ -1274,12 +1328,12 @@ impl Node {
         let header = build_fsp_header(counter, flags, payload_len);
 
         // Encrypt with AAD binding to the FSP header
-        let ciphertext = session.encrypt_with_aad(&inner_plaintext, &header).map_err(|e| {
-            NodeError::SendFailed {
+        let ciphertext = session
+            .encrypt_with_aad(&inner_plaintext, &header)
+            .map_err(|e| NodeError::SendFailed {
                 node_addr: *dest_addr,
                 reason: format!("session encrypt failed: {}", e),
-            }
-        })?;
+            })?;
 
         // Assemble: header(12) + [coords] + ciphertext
         let mut fsp_payload = Vec::with_capacity(FSP_HEADER_SIZE + ciphertext.len() + 200);
@@ -1317,13 +1371,19 @@ impl Node {
         dest_addr: &NodeAddr,
         ipv6_packet: &[u8],
     ) -> Result<(), NodeError> {
-        let compressed = crate::upper::ipv6_shim::compress_ipv6(ipv6_packet)
-            .ok_or_else(|| NodeError::SendFailed {
+        let compressed = crate::upper::ipv6_shim::compress_ipv6(ipv6_packet).ok_or_else(|| {
+            NodeError::SendFailed {
                 node_addr: *dest_addr,
                 reason: "IPv6 header compression failed".into(),
-            })?;
-        self.send_session_data(dest_addr, FSP_PORT_IPV6_SHIM, FSP_PORT_IPV6_SHIM, &compressed)
-            .await
+            }
+        })?;
+        self.send_session_data(
+            dest_addr,
+            FSP_PORT_IPV6_SHIM,
+            FSP_PORT_IPV6_SHIM,
+            &compressed,
+        )
+        .await
     }
 
     /// Send a non-data session message (reports, notifications) over an established session.
@@ -1342,10 +1402,13 @@ impl Node {
         let now_ms = Self::now_ms();
 
         // Read spin bit and session timestamp from entry
-        let entry = self.sessions.get(dest_addr).ok_or_else(|| NodeError::SendFailed {
-            node_addr: *dest_addr,
-            reason: "no session".into(),
-        })?;
+        let entry = self
+            .sessions
+            .get(dest_addr)
+            .ok_or_else(|| NodeError::SendFailed {
+                node_addr: *dest_addr,
+                reason: "no session".into(),
+            })?;
         let timestamp = entry.session_timestamp(now_ms);
         let spin_bit = entry.mmp().is_some_and(|m| m.spin_bit.tx_bit());
 
@@ -1353,10 +1416,13 @@ impl Node {
         let inner_flags = FspInnerFlags { spin_bit }.to_byte();
 
         // Get mutable access for encryption
-        let entry = self.sessions.get_mut(dest_addr).ok_or_else(|| NodeError::SendFailed {
-            node_addr: *dest_addr,
-            reason: "no session".into(),
-        })?;
+        let entry = self
+            .sessions
+            .get_mut(dest_addr)
+            .ok_or_else(|| NodeError::SendFailed {
+                node_addr: *dest_addr,
+                reason: "no session".into(),
+            })?;
 
         // Read K-bit before mutable borrow of session state
         let k_flags = if entry.current_k_bit() { FSP_FLAG_K } else { 0 };
@@ -1381,12 +1447,12 @@ impl Node {
         let header = build_fsp_header(counter, k_flags, payload_len);
 
         // Encrypt with AAD
-        let ciphertext = session.encrypt_with_aad(&inner_plaintext, &header).map_err(|e| {
-            NodeError::SendFailed {
+        let ciphertext = session
+            .encrypt_with_aad(&inner_plaintext, &header)
+            .map_err(|e| NodeError::SendFailed {
                 node_addr: *dest_addr,
                 reason: format!("session encrypt failed: {}", e),
-            }
-        })?;
+            })?;
 
         // Assemble: header(12) + ciphertext (no coords)
         let mut fsp_payload = Vec::with_capacity(FSP_HEADER_SIZE + ciphertext.len());
@@ -1416,28 +1482,31 @@ impl Node {
     /// coordinates via `try_warm_coord_cache()` (same as CP-flagged data
     /// packets). The encrypted inner payload is the 6-byte inner header
     /// with no application data.
-    async fn send_coords_warmup(
-        &mut self,
-        dest_addr: &NodeAddr,
-    ) -> Result<(), NodeError> {
+    async fn send_coords_warmup(&mut self, dest_addr: &NodeAddr) -> Result<(), NodeError> {
         let now_ms = Self::now_ms();
 
         let my_coords = self.tree_state.my_coords().clone();
         let dest_coords = self.get_dest_coords(dest_addr);
 
         // Read session metadata
-        let entry = self.sessions.get(dest_addr).ok_or_else(|| NodeError::SendFailed {
-            node_addr: *dest_addr,
-            reason: "no session".into(),
-        })?;
+        let entry = self
+            .sessions
+            .get(dest_addr)
+            .ok_or_else(|| NodeError::SendFailed {
+                node_addr: *dest_addr,
+                reason: "no session".into(),
+            })?;
         let timestamp = entry.session_timestamp(now_ms);
         let spin_bit = entry.mmp().is_some_and(|m| m.spin_bit.tx_bit());
 
         // Get mutable access for encryption
-        let entry = self.sessions.get_mut(dest_addr).ok_or_else(|| NodeError::SendFailed {
-            node_addr: *dest_addr,
-            reason: "no session".into(),
-        })?;
+        let entry = self
+            .sessions
+            .get_mut(dest_addr)
+            .ok_or_else(|| NodeError::SendFailed {
+                node_addr: *dest_addr,
+                reason: "no session".into(),
+            })?;
         let session = match entry.state_mut() {
             EndToEndState::Established(s) => s,
             _ => {
@@ -1460,12 +1529,12 @@ impl Node {
         let header = build_fsp_header(counter, FSP_FLAG_CP, payload_len);
 
         // Encrypt with AAD
-        let ciphertext = session.encrypt_with_aad(&inner_plaintext, &header).map_err(|e| {
-            NodeError::SendFailed {
+        let ciphertext = session
+            .encrypt_with_aad(&inner_plaintext, &header)
+            .map_err(|e| NodeError::SendFailed {
                 node_addr: *dest_addr,
                 reason: format!("session encrypt failed: {}", e),
-            }
-        })?;
+            })?;
 
         // Assemble: header(12) + coords + ciphertext
         let coords_size = coords_wire_size(&my_coords) + coords_wire_size(&dest_coords);
@@ -1532,7 +1601,8 @@ impl Node {
         }
 
         let encoded = datagram.encode();
-        self.send_encrypted_link_message(&next_hop_addr, &encoded).await?;
+        self.send_encrypted_link_message(&next_hop_addr, &encoded)
+            .await?;
         self.stats_mut().forwarding.record_originated(encoded.len());
         Ok(())
     }
@@ -1639,19 +1709,20 @@ impl Node {
 
     /// Send ICMPv6 Destination Unreachable back through TUN.
     pub(in crate::node) fn send_icmpv6_dest_unreachable(&self, original_packet: &[u8]) {
-        use crate::upper::icmp::{build_dest_unreachable, should_send_icmp_error, DestUnreachableCode};
         use crate::FipsAddress;
+        use crate::upper::icmp::{
+            DestUnreachableCode, build_dest_unreachable, should_send_icmp_error,
+        };
 
         if !should_send_icmp_error(original_packet) {
             return;
         }
 
         let our_ipv6 = FipsAddress::from_node_addr(self.node_addr()).to_ipv6();
-        if let Some(response) = build_dest_unreachable(
-            original_packet,
-            DestUnreachableCode::NoRoute,
-            our_ipv6,
-        ) && let Some(tun_tx) = &self.tun_tx {
+        if let Some(response) =
+            build_dest_unreachable(original_packet, DestUnreachableCode::NoRoute, our_ipv6)
+            && let Some(tun_tx) = &self.tun_tx
+        {
             let _ = tun_tx.send(response);
         }
     }
@@ -1708,10 +1779,7 @@ impl Node {
             return;
         }
 
-        let queue = self
-            .pending_tun_packets
-            .entry(dest_addr)
-            .or_default();
+        let queue = self.pending_tun_packets.entry(dest_addr).or_default();
         if queue.len() >= self.config.node.session.pending_packets_per_dest {
             queue.pop_front(); // Drop oldest
         }

src/node/handlers/timeout.rs

@@ -22,7 +22,9 @@ impl Node {
             .unwrap_or(0);
         let timeout_ms = self.config.node.rate_limit.handshake_timeout_secs * 1000;
 
-        let stale: Vec<LinkId> = self.connections.iter()
+        let stale: Vec<LinkId> = self
+            .connections
+            .iter()
             .filter(|(_, conn)| conn.is_timed_out(now_ms, timeout_ms) || conn.is_failed())
             .map(|(link_id, _)| *link_id)
             .collect();
@@ -96,7 +98,9 @@ impl Node {
 
         // Collect resend candidates: outbound, in SentMsg1, with stored msg1,
         // under max resends, and past the scheduled time.
-        let candidates: Vec<(LinkId, Vec<u8>)> = self.connections.iter()
+        let candidates: Vec<(LinkId, Vec<u8>)> = self
+            .connections
+            .iter()
             .filter(|(_, conn)| {
                 conn.is_outbound()
                     && conn.handshake_state() == HandshakeState::SentMsg1
@@ -136,9 +140,7 @@ impl Node {
                 false
             };
 
-            if sent
-                && let Some(conn) = self.connections.get_mut(&link_id)
-            {
+            if sent && let Some(conn) = self.connections.get_mut(&link_id) {
                 let count = conn.resend_count() + 1;
                 let next = now_ms + (interval_ms as f64 * backoff.powi(count as i32)) as u64;
                 conn.record_resend(next);
@@ -169,10 +171,11 @@ impl Node {
         let ttl = self.config.node.session.default_ttl;
 
         // First pass: find timed-out sessions to remove
-        let timed_out: Vec<crate::NodeAddr> = self.sessions.iter()
+        let timed_out: Vec<crate::NodeAddr> = self
+            .sessions
+            .iter()
             .filter(|(_, entry)| {
-                !entry.is_established()
-                    && now_ms.saturating_sub(entry.last_activity()) > timeout_ms
+                !entry.is_established() && now_ms.saturating_sub(entry.last_activity()) > timeout_ms
             })
             .map(|(addr, _)| *addr)
             .collect();
@@ -186,7 +189,9 @@ impl Node {
 
         // Second pass: collect resend candidates
         let my_addr = *self.node_addr();
-        let candidates: Vec<(crate::NodeAddr, Vec<u8>)> = self.sessions.iter()
+        let candidates: Vec<(crate::NodeAddr, Vec<u8>)> = self
+            .sessions
+            .iter()
             .filter(|(_, entry)| {
                 !entry.is_established()
                     && entry.handshake_payload().is_some()
@@ -200,8 +205,7 @@ impl Node {
         for (dest_addr, payload) in candidates {
             use crate::protocol::SessionDatagram;
 
-            let mut datagram = SessionDatagram::new(my_addr, dest_addr, payload)
-                .with_ttl(ttl);
+            let mut datagram = SessionDatagram::new(my_addr, dest_addr, payload).with_ttl(ttl);
             let sent = match self.send_session_datagram(&mut datagram).await {
                 Ok(_) => true,
                 Err(e) => {
@@ -214,9 +218,7 @@ impl Node {
                 }
             };
 
-            if sent
-                && let Some(entry) = self.sessions.get_mut(&dest_addr)
-            {
+            if sent && let Some(entry) = self.sessions.get_mut(&dest_addr) {
                 let count = entry.resend_count() + 1;
                 let next = now_ms + (interval_ms as f64 * backoff.powi(count as i32)) as u64;
                 entry.record_resend(next);
@@ -239,10 +241,11 @@ impl Node {
             return; // disabled
         }
 
-        let idle: Vec<_> = self.sessions.iter()
+        let idle: Vec<_> = self
+            .sessions
+            .iter()
             .filter(|(_, entry)| {
-                entry.is_established()
-                    && now_ms.saturating_sub(entry.last_activity()) > timeout_ms
+                entry.is_established() && now_ms.saturating_sub(entry.last_activity()) > timeout_ms
             })
             .map(|(addr, _)| *addr)
             .collect();

src/node/rate_limit.rs

@@ -237,7 +237,6 @@ impl HandshakeRateLimiter {
     }
 }
 
-
 #[cfg(test)]
 mod tests {
     use super::*;

src/node/retry.rs

@@ -5,9 +5,9 @@
 //! (not PeerConnection) because each retry creates a fresh connection.
 
 use super::Node;
+use crate::PeerIdentity;
 use crate::config::PeerConfig;
 use crate::identity::NodeAddr;
-use crate::PeerIdentity;
 use tracing::{debug, info, warn};
 
 // MAX_BACKOFF_MS is now derived from config: node.retry.max_backoff_secs * 1000
@@ -44,7 +44,9 @@ impl RetryState {
     /// capped at `MAX_BACKOFF_MS`.
     pub fn backoff_ms(&self, base_interval_ms: u64, max_backoff_ms: u64) -> u64 {
         let multiplier = 1u64.checked_shl(self.retry_count).unwrap_or(u64::MAX);
-        base_interval_ms.saturating_mul(multiplier).min(max_backoff_ms)
+        base_interval_ms
+            .saturating_mul(multiplier)
+            .min(max_backoff_ms)
     }
 }
 
@@ -55,11 +57,7 @@ impl Node {
     /// have not been exhausted (unless `reconnect` is true, which retries
     /// indefinitely). Does nothing if the peer is already connected or has
     /// a connection in progress.
-    pub(super) fn schedule_retry(
-        &mut self,
-        node_addr: NodeAddr,
-        now_ms: u64,
-    ) {
+    pub(super) fn schedule_retry(&mut self, node_addr: NodeAddr, now_ms: u64) {
         let retry_cfg = &self.config.node.retry;
         let max_retries = retry_cfg.max_retries;
         if max_retries == 0 {
@@ -240,8 +238,7 @@ impl Node {
                     // succeeds, promote_connection() clears retry_pending. If
                     // it times out, check_timeouts() calls schedule_retry()
                     // which bumps the counter and applies proper backoff.
-                    let hs_timeout_ms =
-                        self.config.node.rate_limit.handshake_timeout_secs * 1000;
+                    let hs_timeout_ms = self.config.node.rate_limit.handshake_timeout_secs * 1000;
                     if let Some(state) = self.retry_pending.get_mut(&node_addr) {
                         state.retry_after_ms = now_ms + hs_timeout_ms;
                     }
@@ -317,7 +314,10 @@ mod tests {
             retry_after_ms: 0,
             reconnect: false,
         };
-        assert_eq!(state.backoff_ms(5000, TEST_MAX_BACKOFF_MS), TEST_MAX_BACKOFF_MS);
+        assert_eq!(
+            state.backoff_ms(5000, TEST_MAX_BACKOFF_MS),
+            TEST_MAX_BACKOFF_MS
+        );
     }
 
     #[test]

src/node/routing_error_rate_limit.rs

@@ -70,7 +70,6 @@ impl RoutingErrorRateLimiter {
     pub fn len(&self) -> usize {
         self.last_sent.len()
     }
-
 }
 
 impl Default for RoutingErrorRateLimiter {

src/node/session.rs

@@ -7,10 +7,10 @@
 
 use std::time::Instant;
 
+use crate::NodeAddr;
 use crate::config::SessionMmpConfig;
 use crate::mmp::MmpSessionState;
 use crate::noise::{HandshakeState, NoiseSession};
-use crate::NodeAddr;
 use secp256k1::PublicKey;
 
 /// State machine for an end-to-end session.
@@ -159,12 +159,16 @@ impl SessionEntry {
     /// Get the current session state.
     #[cfg(test)]
     pub(crate) fn state(&self) -> &EndToEndState {
-        self.state.as_ref().expect("session state taken but not restored")
+        self.state
+            .as_ref()
+            .expect("session state taken but not restored")
     }
 
     /// Get mutable access to the session state.
     pub(crate) fn state_mut(&mut self) -> &mut EndToEndState {
-        self.state.as_mut().expect("session state taken but not restored")
+        self.state
+            .as_mut()
+            .expect("session state taken but not restored")
     }
 
     /// Replace the session state.
@@ -278,7 +282,12 @@ impl SessionEntry {
 
     /// Get traffic counters: (packets_sent, packets_recv, bytes_sent, bytes_recv).
     pub(crate) fn traffic_counters(&self) -> (u64, u64, u64, u64) {
-        (self.packets_sent, self.packets_recv, self.bytes_sent, self.bytes_recv)
+        (
+            self.packets_sent,
+            self.packets_recv,
+            self.bytes_sent,
+            self.bytes_recv,
+        )
     }
 
     // === Handshake Resend ===

src/node/session_wire.rs

@@ -208,8 +208,7 @@ impl FspEncryptedHeader {
 
         let payload_len = u16::from_le_bytes([data[2], data[3]]);
         let counter = u64::from_le_bytes([
-            data[4], data[5], data[6], data[7],
-            data[8], data[9], data[10], data[11],
+            data[4], data[5], data[6], data[7], data[8], data[9], data[10], data[11],
         ]);
 
         let mut header_bytes = [0u8; FSP_HEADER_SIZE];
@@ -242,11 +241,7 @@ impl FspEncryptedHeader {
 /// Build the 12-byte cleartext header for an encrypted FSP message.
 ///
 /// Returns the header bytes for use as AEAD AAD.
-pub fn build_fsp_header(
-    counter: u64,
-    flags: u8,
-    payload_len: u16,
-) -> [u8; FSP_HEADER_SIZE] {
+pub fn build_fsp_header(counter: u64, flags: u8, payload_len: u16) -> [u8; FSP_HEADER_SIZE] {
     let mut header = [0u8; FSP_HEADER_SIZE];
     header[0] = FspCommonPrefix::ver_phase_byte(FSP_VERSION, FSP_PHASE_ESTABLISHED);
     header[1] = flags;
@@ -323,12 +318,15 @@ pub fn fsp_strip_inner_header(plaintext: &[u8]) -> Option<(u32, u8, u8, &[u8])>
     if plaintext.len() < FSP_INNER_HEADER_SIZE {
         return None;
     }
-    let timestamp = u32::from_le_bytes([
-        plaintext[0], plaintext[1], plaintext[2], plaintext[3],
-    ]);
+    let timestamp = u32::from_le_bytes([plaintext[0], plaintext[1], plaintext[2], plaintext[3]]);
     let msg_type = plaintext[4];
     let inner_flags = plaintext[5];
-    Some((timestamp, msg_type, inner_flags, &plaintext[FSP_INNER_HEADER_SIZE..]))
+    Some((
+        timestamp,
+        msg_type,
+        inner_flags,
+        &plaintext[FSP_INNER_HEADER_SIZE..],
+    ))
 }
 
 // ============================================================================
@@ -465,8 +463,8 @@ mod tests {
         assert_eq!(u16::from_le_bytes([header[2], header[3]]), 200);
         assert_eq!(
             u64::from_le_bytes([
-                header[4], header[5], header[6], header[7],
-                header[8], header[9], header[10], header[11],
+                header[4], header[5], header[6], header[7], header[8], header[9], header[10],
+                header[11],
             ]),
             1000
         );

src/node/tests/bloom.rs

@@ -16,10 +16,7 @@ fn get_tree_edges(nodes: &[TestNode]) -> Vec<(usize, usize)> {
         let ts = tn.node.tree_state();
         if !ts.is_root() {
             let parent_addr = ts.my_declaration().parent_id();
-            if let Some(j) = nodes
-                .iter()
-                .position(|n| n.node.node_addr() == parent_addr)
-            {
+            if let Some(j) = nodes.iter().position(|n| n.node.node_addr() == parent_addr) {
                 edges.push((i, j));
             }
         }
@@ -174,8 +171,7 @@ async fn test_bloom_filter_star() {
 /// entries, and so on. Both endpoints should see all other nodes.
 #[tokio::test]
 async fn test_bloom_filter_chain_propagation() {
-    let edges: Vec<(usize, usize)> =
-        vec![(0, 1), (1, 2), (2, 3), (3, 4), (4, 5), (5, 6), (6, 7)];
+    let edges: Vec<(usize, usize)> = vec![(0, 1), (1, 2), (2, 3), (3, 4), (4, 5), (5, 6), (6, 7)];
     let mut nodes = run_tree_test(8, &edges, false).await;
     verify_tree_convergence(&nodes);
     verify_filter_exchange(&nodes, &edges);
@@ -315,8 +311,7 @@ fn collect_subtree(
 #[tokio::test]
 async fn test_bloom_filter_split_horizon() {
     // Pure tree: 7 nodes, 6 edges
-    let edges: Vec<(usize, usize)> =
-        vec![(0, 1), (0, 2), (1, 3), (1, 4), (2, 5), (5, 6)];
+    let edges: Vec<(usize, usize)> = vec![(0, 1), (0, 2), (1, 3), (1, 4), (2, 5), (5, 6)];
     let mut nodes = run_tree_test(7, &edges, false).await;
     verify_tree_convergence(&nodes);
     verify_filter_exchange(&nodes, &edges);
@@ -340,9 +335,7 @@ async fn test_bloom_filter_split_horizon() {
     // - parent's filter to child contains the complement only
     for &(child_idx, parent_idx) in &tree_edges {
         let child_subtree = collect_subtree(child_idx, Some(parent_idx), &tree_adj);
-        let complement: Vec<usize> = (0..n)
-            .filter(|i| !child_subtree.contains(i))
-            .collect();
+        let complement: Vec<usize> = (0..n).filter(|i| !child_subtree.contains(i)).collect();
 
         // --- Upward filter: child → parent ---
         // This is stored as parent's inbound filter from child
@@ -358,7 +351,9 @@ async fn test_bloom_filter_split_horizon() {
             assert!(
                 filter_up.contains(&addrs[idx]),
                 "Upward filter (n{}→n{}): should contain subtree member n{} but doesn't",
-                child_idx, parent_idx, idx
+                child_idx,
+                parent_idx,
+                idx
             );
         }
 
@@ -367,7 +362,9 @@ async fn test_bloom_filter_split_horizon() {
             assert!(
                 !filter_up.contains(&addrs[idx]),
                 "Upward filter (n{}→n{}): should NOT contain complement member n{} but does",
-                child_idx, parent_idx, idx
+                child_idx,
+                parent_idx,
+                idx
             );
         }
 
@@ -376,7 +373,10 @@ async fn test_bloom_filter_split_horizon() {
         assert!(
             (up_est - child_subtree.len() as f64).abs() < 1.5,
             "Upward filter (n{}→n{}): expected ~{} entries, got {:.1}",
-            child_idx, parent_idx, child_subtree.len(), up_est
+            child_idx,
+            parent_idx,
+            child_subtree.len(),
+            up_est
         );
 
         // --- Downward filter: parent → child ---
@@ -393,7 +393,9 @@ async fn test_bloom_filter_split_horizon() {
             assert!(
                 filter_down.contains(&addrs[idx]),
                 "Downward filter (n{}→n{}): should contain complement member n{} but doesn't",
-                parent_idx, child_idx, idx
+                parent_idx,
+                child_idx,
+                idx
             );
         }
 
@@ -405,7 +407,9 @@ async fn test_bloom_filter_split_horizon() {
             assert!(
                 !filter_down.contains(&addrs[idx]),
                 "Downward filter (n{}→n{}): should NOT contain subtree member n{} but does",
-                parent_idx, child_idx, idx
+                parent_idx,
+                child_idx,
+                idx
             );
         }
 
@@ -414,7 +418,10 @@ async fn test_bloom_filter_split_horizon() {
         assert!(
             (down_est - complement.len() as f64).abs() < 1.5,
             "Downward filter (n{}→n{}): expected ~{} entries, got {:.1}",
-            parent_idx, child_idx, complement.len(), down_est
+            parent_idx,
+            child_idx,
+            complement.len(),
+            down_est
         );
 
         // Together, subtree + complement = all nodes

src/node/tests/disconnect.rs

@@ -258,10 +258,8 @@ async fn test_disconnect_clears_session() {
     {
         let our_identity = nodes[1].node.identity();
 
-        let mut initiator = HandshakeState::new_initiator(
-            our_identity.keypair(),
-            remote_identity.pubkey_full(),
-        );
+        let mut initiator =
+            HandshakeState::new_initiator(our_identity.keypair(), remote_identity.pubkey_full());
         let mut responder = HandshakeState::new_responder(remote_identity.keypair());
         let mut init_epoch = [0u8; 8];
         rand::Rng::fill_bytes(&mut rand::rng(), &mut init_epoch);
@@ -285,8 +283,16 @@ async fn test_disconnect_clears_session() {
         nodes[1].node.sessions.insert(node0_addr, entry);
     }
 
-    assert_eq!(nodes[1].node.session_count(), 1, "Session should exist before disconnect");
-    assert_eq!(nodes[1].node.peer_count(), 1, "Peer should exist before disconnect");
+    assert_eq!(
+        nodes[1].node.session_count(),
+        1,
+        "Session should exist before disconnect"
+    );
+    assert_eq!(
+        nodes[1].node.peer_count(),
+        1,
+        "Peer should exist before disconnect"
+    );
 
     // Node 0 sends Disconnect to node 1.
     let disconnect = crate::protocol::Disconnect::new(DisconnectReason::Shutdown);
@@ -301,7 +307,8 @@ async fn test_disconnect_clears_session() {
 
     // Peer must be gone.
     assert_eq!(
-        nodes[1].node.peer_count(), 0,
+        nodes[1].node.peer_count(),
+        0,
         "Peer should be removed after disconnect"
     );
 
@@ -309,7 +316,8 @@ async fn test_disconnect_clears_session() {
     // Before the fix, session_count() would still be 1 here because
     // remove_active_peer didn't remove self.sessions[node0_addr].
     assert_eq!(
-        nodes[1].node.session_count(), 0,
+        nodes[1].node.session_count(),
+        0,
         "Session must be cleaned up when peer is removed (regression: issue #5)"
     );
 

src/node/tests/discovery.rs

@@ -149,10 +149,8 @@ async fn test_response_transit_needs_recent_request() {
         .duration_since(std::time::UNIX_EPOCH)
         .unwrap()
         .as_millis() as u64;
-    node.recent_requests.insert(
-        444,
-        RecentRequest::new(make_node_addr(0xDD), now_ms),
-    );
+    node.recent_requests
+        .insert(444, RecentRequest::new(make_node_addr(0xDD), now_ms));
 
     // Handle response — should try to reverse-path forward to 0xDD
     // (will fail silently since 0xDD is not an actual peer)
@@ -282,11 +280,7 @@ async fn test_response_coord_substitution_detected() {
     let target = *target_identity.node_addr();
     let root = make_node_addr(0xF0);
     let real_coords = TreeCoordinate::from_addrs(vec![target, root]).unwrap();
-    let fake_coords = TreeCoordinate::from_addrs(vec![
-        target,
-        make_node_addr(0xEE),
-        root,
-    ]).unwrap();
+    let fake_coords = TreeCoordinate::from_addrs(vec![target, make_node_addr(0xEE), root]).unwrap();
 
     // Register target in identity_cache
     node.register_identity(target, target_identity.pubkey_full());
@@ -325,16 +319,12 @@ async fn test_recent_request_expiry() {
         .as_millis() as u64;
 
     // Insert an old request (11 seconds ago)
-    node.recent_requests.insert(
-        123,
-        RecentRequest::new(make_node_addr(1), now_ms - 11_000),
-    );
+    node.recent_requests
+        .insert(123, RecentRequest::new(make_node_addr(1), now_ms - 11_000));
 
     // Insert a recent request
-    node.recent_requests.insert(
-        456,
-        RecentRequest::new(make_node_addr(2), now_ms),
-    );
+    node.recent_requests
+        .insert(456, RecentRequest::new(make_node_addr(2), now_ms));
 
     assert_eq!(node.recent_requests.len(), 2);
 
@@ -344,7 +334,8 @@ async fn test_recent_request_expiry() {
     let coords = TreeCoordinate::from_addrs(vec![origin, make_node_addr(0)]).unwrap();
     let request = LookupRequest::new(789, target, origin, coords, 3, 0);
     let payload = &request.encode()[1..];
-    node.handle_lookup_request(&make_node_addr(0xAA), payload).await;
+    node.handle_lookup_request(&make_node_addr(0xAA), payload)
+        .await;
 
     // Old entry (123) should be purged, recent entry (456) and new entry (789) kept
     assert!(!node.recent_requests.contains_key(&123));
@@ -381,7 +372,10 @@ async fn test_request_forwarding_two_node() {
     // Process packets — node1 should receive the forwarded request
     tokio::time::sleep(Duration::from_millis(50)).await;
     let count = process_available_packets(&mut nodes).await;
-    assert!(count > 0, "Expected forwarded LookupRequest to arrive at node 1");
+    assert!(
+        count > 0,
+        "Expected forwarded LookupRequest to arrive at node 1"
+    );
 
     // Node1 should have recorded the request
     assert!(
@@ -546,10 +540,7 @@ async fn test_discovery_100_nodes() {
     }
 
     // Collect all node addresses and public keys for lookup targets
-    let all_addrs: Vec<NodeAddr> = nodes
-        .iter()
-        .map(|tn| *tn.node.node_addr())
-        .collect();
+    let all_addrs: Vec<NodeAddr> = nodes.iter().map(|tn| *tn.node.node_addr()).collect();
     let all_pubkeys: Vec<secp256k1::PublicKey> = nodes
         .iter()
         .map(|tn| tn.node.identity().pubkey_full())
@@ -563,7 +554,8 @@ async fn test_discovery_100_nodes() {
             if src == dst {
                 continue;
             }
-            node.node.register_identity(all_addrs[dst], all_pubkeys[dst]);
+            node.node
+                .register_identity(all_addrs[dst], all_pubkeys[dst]);
         }
     }
 
@@ -588,10 +580,7 @@ async fn test_discovery_100_nodes() {
         let mut initiated = false;
         for &(s, dst) in &lookup_pairs {
             if s == src {
-                nodes[src]
-                    .node
-                    .initiate_lookup(&all_addrs[dst], TTL)
-                    .await;
+                nodes[src].node.initiate_lookup(&all_addrs[dst], TTL).await;
                 initiated = true;
             }
         }
@@ -628,7 +617,11 @@ async fn test_discovery_100_nodes() {
     let mut failed_pairs: Vec<(usize, usize)> = Vec::new();
 
     for &(src, dst) in &lookup_pairs {
-        if nodes[src].node.coord_cache().contains(&all_addrs[dst], now_ms) {
+        if nodes[src]
+            .node
+            .coord_cache()
+            .contains(&all_addrs[dst], now_ms)
+        {
             resolved += 1;
         } else {
             failed += 1;
@@ -638,9 +631,7 @@ async fn test_discovery_100_nodes() {
         }
     }
 
-    eprintln!(
-        "\n  === Discovery 100-Node Test ===",
-    );
+    eprintln!("\n  === Discovery 100-Node Test ===",);
     eprintln!(
         "  Lookups: {} | Resolved: {} | Failed: {} | Success rate: {:.1}%",
         total_lookups,
@@ -651,8 +642,16 @@ async fn test_discovery_100_nodes() {
 
     // Report coord_cache stats across all nodes
     let total_cached: usize = nodes.iter().map(|tn| tn.node.coord_cache().len()).sum();
-    let min_cached = nodes.iter().map(|tn| tn.node.coord_cache().len()).min().unwrap();
-    let max_cached = nodes.iter().map(|tn| tn.node.coord_cache().len()).max().unwrap();
+    let min_cached = nodes
+        .iter()
+        .map(|tn| tn.node.coord_cache().len())
+        .min()
+        .unwrap();
+    let max_cached = nodes
+        .iter()
+        .map(|tn| tn.node.coord_cache().len())
+        .max()
+        .unwrap();
     eprintln!(
         "  Coord cache entries: total={} min={} max={} avg={:.1}",
         total_cached,
@@ -663,21 +662,32 @@ async fn test_discovery_100_nodes() {
 
     // Detailed diagnostics for failures (to aid future debugging)
     if !failed_pairs.is_empty() {
-        eprintln!("  --- Failure Diagnostics ({} failures) ---", failed_pairs.len());
+        eprintln!(
+            "  --- Failure Diagnostics ({} failures) ---",
+            failed_pairs.len()
+        );
         for &(src, dst) in &failed_pairs {
             let src_coords = nodes[src].node.tree_state().my_coords().clone();
             let dst_coords = nodes[dst].node.tree_state().my_coords().clone();
             let tree_dist = src_coords.distance_to(&dst_coords);
-            let reverse_cached = nodes[dst].node.coord_cache().contains(&all_addrs[src], now_ms);
+            let reverse_cached = nodes[dst]
+                .node
+                .coord_cache()
+                .contains(&all_addrs[src], now_ms);
             let src_peers = nodes[src].node.peers.len();
             let dst_peers = nodes[dst].node.peers.len();
 
             eprintln!(
                 "    node {} -> node {}: tree_dist={} src_depth={} dst_depth={} \
                  src_peers={} dst_peers={} reverse_cached={}",
-                src, dst, tree_dist,
-                src_coords.depth(), dst_coords.depth(),
-                src_peers, dst_peers, reverse_cached
+                src,
+                dst,
+                tree_dist,
+                src_coords.depth(),
+                dst_coords.depth(),
+                src_peers,
+                dst_peers,
+                reverse_cached
             );
         }
     }
@@ -730,7 +740,9 @@ async fn test_response_path_mtu_two_node() {
 
     // Check that path_mtu was stored in the cache entry
     let entry = nodes[0].node.coord_cache().get_entry(&node1_addr).unwrap();
-    let path_mtu = entry.path_mtu().expect("path_mtu should be set from discovery");
+    let path_mtu = entry
+        .path_mtu()
+        .expect("path_mtu should be set from discovery");
     // In a 2-node setup, no transit node applies the min() so path_mtu stays u16::MAX
     assert_eq!(
         path_mtu,
@@ -774,7 +786,9 @@ async fn test_response_path_mtu_three_node_chain() {
 
     // Node1 is transit and applies min(u16::MAX, 1280) = 1280
     let entry = nodes[0].node.coord_cache().get_entry(&node2_addr).unwrap();
-    let path_mtu = entry.path_mtu().expect("path_mtu should be set from discovery");
+    let path_mtu = entry
+        .path_mtu()
+        .expect("path_mtu should be set from discovery");
     assert_eq!(
         path_mtu, 1280,
         "Three-node chain path_mtu should reflect transit node's transport MTU (1280)"
@@ -796,12 +810,8 @@ async fn test_cache_entry_path_mtu_stored() {
     let coords = TreeCoordinate::from_addrs(vec![target, make_node_addr(0)]).unwrap();
 
     let now_ms = 1000u64;
-    node.coord_cache_mut().insert_with_path_mtu(
-        target,
-        coords,
-        now_ms,
-        1280,
-    );
+    node.coord_cache_mut()
+        .insert_with_path_mtu(target, coords, now_ms, 1280);
 
     let entry = node.coord_cache().get_entry(&target).unwrap();
     assert_eq!(entry.path_mtu(), Some(1280));

src/node/tests/ethernet.rs

@@ -6,8 +6,8 @@
 use super::*;
 use crate::config::EthernetConfig;
 use crate::transport::ethernet::EthernetTransport;
-use crate::transport::{packet_channel, TransportAddr, TransportHandle, TransportId};
-use spanning_tree::{cleanup_nodes, drain_all_packets, initiate_handshake, TestNode};
+use crate::transport::{TransportAddr, TransportHandle, TransportId, packet_channel};
+use spanning_tree::{TestNode, cleanup_nodes, drain_all_packets, initiate_handshake};
 
 use std::process::Command;
 use std::sync::atomic::{AtomicU32, Ordering};
@@ -40,7 +40,9 @@ impl VethPair {
 
         // Create veth pair
         let status = Command::new("ip")
-            .args(["link", "add", &name_a, "type", "veth", "peer", "name", &name_b])
+            .args([
+                "link", "add", &name_a, "type", "veth", "peer", "name", &name_b,
+            ])
             .status()
             .expect("failed to run 'ip link add'");
         assert!(status.success(), "failed to create veth pair");
@@ -91,7 +93,9 @@ async fn make_test_node_ethernet(interface: &str) -> TestNode {
     let mut transport = EthernetTransport::new(transport_id, None, config, packet_tx);
     transport.start_async().await.unwrap();
 
-    let mac = transport.local_mac().expect("transport should have MAC after start");
+    let mac = transport
+        .local_mac()
+        .expect("transport should have MAC after start");
     let addr = TransportAddr::from_bytes(&mac);
 
     node.transports

src/node/tests/forwarding.rs

@@ -5,12 +5,11 @@
 //! multi-hop forwarding through live node topologies.
 
 use super::*;
-use crate::node::session_wire::{build_fsp_header, FSP_FLAG_CP};
+use crate::node::session_wire::{FSP_FLAG_CP, build_fsp_header};
 use crate::protocol::{SessionAck, SessionDatagram, SessionSetup, encode_coords};
 use crate::tree::TreeCoordinate;
 use spanning_tree::{
-    cleanup_nodes, process_available_packets, run_tree_test, verify_tree_convergence,
-    TestNode,
+    TestNode, cleanup_nodes, process_available_packets, run_tree_test, verify_tree_convergence,
 };
 
 // ============================================================================
@@ -35,11 +34,11 @@ async fn test_forwarding_hop_limit_exhausted() {
     let from = make_node_addr(0xAA);
     let src = make_node_addr(0x01);
     let dest = make_node_addr(0x02);
-    let dg = SessionDatagram::new(src, dest, vec![0x10, 0x00, 0x00, 0x00])
-        .with_ttl(0);
+    let dg = SessionDatagram::new(src, dest, vec![0x10, 0x00, 0x00, 0x00]).with_ttl(0);
     let encoded = dg.encode();
     // Dispatch with payload after msg_type byte
-    node.handle_session_datagram(&from, &encoded[1..], false).await;
+    node.handle_session_datagram(&from, &encoded[1..], false)
+        .await;
     // No panic, no send (node has no peers)
 }
 
@@ -52,11 +51,11 @@ async fn test_forwarding_hop_limit_one_drops_at_transit() {
     let from = make_node_addr(0xAA);
     let my_addr = *node.node_addr();
     let src = make_node_addr(0x01);
-    let dg = SessionDatagram::new(src, my_addr, vec![0x10, 0x00, 0x00, 0x00])
-        .with_ttl(1);
+    let dg = SessionDatagram::new(src, my_addr, vec![0x10, 0x00, 0x00, 0x00]).with_ttl(1);
     let encoded = dg.encode();
     // Should succeed — ttl=1 decrements to 0 but packet is still processed
-    node.handle_session_datagram(&from, &encoded[1..], false).await;
+    node.handle_session_datagram(&from, &encoded[1..], false)
+        .await;
 }
 
 // --- Local delivery ---
@@ -69,7 +68,8 @@ async fn test_forwarding_local_delivery() {
     let dg = SessionDatagram::new(from, my_addr, vec![0x10, 0x00, 0x00, 0x00]);
     let encoded = dg.encode();
     // Should detect local delivery and return without forwarding
-    node.handle_session_datagram(&from, &encoded[1..], false).await;
+    node.handle_session_datagram(&from, &encoded[1..], false)
+        .await;
 }
 
 // --- Direct peer forwarding ---
@@ -135,7 +135,8 @@ async fn test_coord_cache_warming_session_setup() {
 
     // Handle the datagram (will be local delivery or no-route, but cache warming
     // happens before routing decision)
-    node.handle_session_datagram(&from, &encoded[1..], false).await;
+    node.handle_session_datagram(&from, &encoded[1..], false)
+        .await;
 
     // After: both src and dest coords should be cached
     let cached_src = node.coord_cache().get(&src_addr, now_ms);
@@ -175,15 +176,22 @@ async fn test_coord_cache_warming_session_ack() {
     assert!(node.coord_cache().get(&src_addr, now_ms).is_none());
     assert!(node.coord_cache().get(&dest_addr, now_ms).is_none());
 
-    node.handle_session_datagram(&from, &encoded[1..], false).await;
+    node.handle_session_datagram(&from, &encoded[1..], false)
+        .await;
 
     // SessionAck caches both src_coords and dest_coords
     let cached_src = node.coord_cache().get(&src_addr, now_ms);
-    assert!(cached_src.is_some(), "src_addr coords not cached from SessionAck");
+    assert!(
+        cached_src.is_some(),
+        "src_addr coords not cached from SessionAck"
+    );
     assert_eq!(cached_src.unwrap().root_id(), &root_addr);
 
     let cached_dest = node.coord_cache().get(&dest_addr, now_ms);
-    assert!(cached_dest.is_some(), "dest_addr coords not cached from SessionAck");
+    assert!(
+        cached_dest.is_some(),
+        "dest_addr coords not cached from SessionAck"
+    );
     assert_eq!(cached_dest.unwrap().root_id(), &root_addr);
 }
 
@@ -217,7 +225,8 @@ async fn test_coord_cache_warming_encrypted_msg_with_coords() {
     assert!(node.coord_cache().get(&src_addr, now_ms).is_none());
     assert!(node.coord_cache().get(&dest_addr, now_ms).is_none());
 
-    node.handle_session_datagram(&from, &encoded[1..], false).await;
+    node.handle_session_datagram(&from, &encoded[1..], false)
+        .await;
 
     assert!(
         node.coord_cache().get(&src_addr, now_ms).is_some(),
@@ -250,7 +259,8 @@ async fn test_coord_cache_warming_encrypted_msg_no_coords() {
         .unwrap()
         .as_millis() as u64;
 
-    node.handle_session_datagram(&from, &encoded[1..], false).await;
+    node.handle_session_datagram(&from, &encoded[1..], false)
+        .await;
 
     assert!(
         node.coord_cache().get(&src_addr, now_ms).is_none(),
@@ -512,8 +522,16 @@ async fn test_forwarding_with_cache_warming_enables_routing() {
                 // Give each node coords for its direct peers only
                 let j_addr = *nodes[j].node.node_addr();
                 if nodes[i].node.get_peer(&j_addr).is_some() {
-                    let coords = all_coords.iter().find(|(a, _)| a == &j_addr).unwrap().1.clone();
-                    nodes[i].node.coord_cache_mut().insert(j_addr, coords, now_ms);
+                    let coords = all_coords
+                        .iter()
+                        .find(|(a, _)| a == &j_addr)
+                        .unwrap()
+                        .1
+                        .clone();
+                    nodes[i]
+                        .node
+                        .coord_cache_mut()
+                        .insert(j_addr, coords, now_ms);
                 }
             }
         }
@@ -572,8 +590,8 @@ async fn test_forwarding_with_cache_warming_enables_routing() {
 // ECN Tests
 // ============================================================================
 
-use crate::node::handlers::session::mark_ipv6_ecn_ce;
 use crate::node::TransportDropState;
+use crate::node::handlers::session::mark_ipv6_ecn_ce;
 use crate::transport::TransportId;
 
 /// Build a minimal IPv6 header (40 bytes) with specified ECN bits.
@@ -721,10 +739,13 @@ fn test_detect_congestion_with_transport_drops() {
 
     // Simulate transport kernel drops
     let tid = TransportId::new(1);
-    node.transport_drops.insert(tid, TransportDropState {
-        prev_drops: 100,
-        dropping: true,
-    });
+    node.transport_drops.insert(
+        tid,
+        TransportDropState {
+            prev_drops: 100,
+            dropping: true,
+        },
+    );
 
     // Now detect_congestion should return true (local transport congestion)
     assert!(node.detect_congestion(&fake_addr));
@@ -741,10 +762,13 @@ fn test_detect_congestion_disabled_ecn() {
 
     // Even with transport drops, disabled ECN should return false
     let tid = TransportId::new(1);
-    node.transport_drops.insert(tid, TransportDropState {
-        prev_drops: 50,
-        dropping: true,
-    });
+    node.transport_drops.insert(
+        tid,
+        TransportDropState {
+            prev_drops: 50,
+            dropping: true,
+        },
+    );
 
     let fake_addr = NodeAddr::from_bytes([1; 16]);
     assert!(!node.detect_congestion(&fake_addr));
@@ -756,10 +780,13 @@ fn test_sample_transport_congestion() {
 
     // Insert a transport drop state with a baseline
     let tid = TransportId::new(1);
-    node.transport_drops.insert(tid, TransportDropState {
-        prev_drops: 0,
-        dropping: false,
-    });
+    node.transport_drops.insert(
+        tid,
+        TransportDropState {
+            prev_drops: 0,
+            dropping: false,
+        },
+    );
 
     // No transports registered — sample_transport_congestion is a no-op
     // (transport_drops entry stays unchanged)

src/node/tests/handshake.rs

@@ -5,9 +5,11 @@ use super::*;
 #[tokio::test]
 async fn test_two_node_handshake_udp() {
     use crate::config::UdpConfig;
+    use crate::node::wire::{
+        build_encrypted, build_established_header, build_msg1, prepend_inner_header,
+    };
     use crate::transport::udp::UdpTransport;
-    use crate::node::wire::{build_encrypted, build_established_header, build_msg1, prepend_inner_header};
-    use tokio::time::{timeout, Duration};
+    use tokio::time::{Duration, timeout};
 
     // === Setup: Two nodes with UDP transports on localhost ===
 
@@ -26,10 +28,8 @@ async fn test_two_node_handshake_udp() {
     let (packet_tx_a, mut packet_rx_a) = packet_channel(64);
     let (packet_tx_b, mut packet_rx_b) = packet_channel(64);
 
-    let mut transport_a =
-        UdpTransport::new(transport_id_a, None, udp_config.clone(), packet_tx_a);
-    let mut transport_b =
-        UdpTransport::new(transport_id_b, None, udp_config, packet_tx_b);
+    let mut transport_a = UdpTransport::new(transport_id_a, None, udp_config.clone(), packet_tx_a);
+    let mut transport_b = UdpTransport::new(transport_id_b, None, udp_config, packet_tx_b);
 
     transport_a.start_async().await.unwrap();
     transport_b.start_async().await.unwrap();
@@ -49,23 +49,20 @@ async fn test_two_node_handshake_udp() {
     // === Phase 1: Node A initiates handshake to Node B ===
 
     // Create peer identity for B (must use full key for ECDH parity)
-    let peer_b_identity =
-        PeerIdentity::from_pubkey_full(node_b.identity.pubkey_full());
+    let peer_b_identity = PeerIdentity::from_pubkey_full(node_b.identity.pubkey_full());
     let peer_b_node_addr = *peer_b_identity.node_addr();
 
     let link_id_a = node_a.allocate_link_id();
-    let mut conn_a = PeerConnection::outbound(
-        link_id_a,
-        peer_b_identity,
-        1000,
-    );
+    let mut conn_a = PeerConnection::outbound(link_id_a, peer_b_identity, 1000);
 
     // Allocate session index for A's outbound
     let our_index_a = node_a.index_allocator.allocate().unwrap();
 
     // Start handshake (generates Noise IK msg1)
     let our_keypair_a = node_a.identity.keypair();
-    let noise_msg1 = conn_a.start_handshake(our_keypair_a, node_a.startup_epoch, 1000).unwrap();
+    let noise_msg1 = conn_a
+        .start_handshake(our_keypair_a, node_a.startup_epoch, 1000)
+        .unwrap();
     conn_a.set_our_index(our_index_a);
     conn_a.set_transport_id(transport_id_a);
     conn_a.set_source_addr(remote_addr_b.clone());
@@ -82,10 +79,9 @@ async fn test_two_node_handshake_udp() {
     );
     node_a.links.insert(link_id_a, link_a);
     node_a.connections.insert(link_id_a, conn_a);
-    node_a.pending_outbound.insert(
-        (transport_id_a, our_index_a.as_u32()),
-        link_id_a,
-    );
+    node_a
+        .pending_outbound
+        .insert((transport_id_a, our_index_a.as_u32()), link_id_a);
 
     // Send msg1 from A to B over UDP
     let transport = node_a.transports.get(&transport_id_a).unwrap();
@@ -104,11 +100,13 @@ async fn test_two_node_handshake_udp() {
     node_b.handle_msg1(packet_b).await;
 
     // Verify B promoted the inbound connection
-    let peer_a_node_addr = *PeerIdentity::from_pubkey_full(
-        node_a.identity.pubkey_full(),
-    )
-    .node_addr();
-    assert_eq!(node_b.peer_count(), 1, "Node B should have 1 peer after msg1");
+    let peer_a_node_addr =
+        *PeerIdentity::from_pubkey_full(node_a.identity.pubkey_full()).node_addr();
+    assert_eq!(
+        node_b.peer_count(),
+        1,
+        "Node B should have 1 peer after msg1"
+    );
     let peer_a_on_b = node_b
         .get_peer(&peer_a_node_addr)
         .expect("Node B should have peer A");
@@ -134,7 +132,11 @@ async fn test_two_node_handshake_udp() {
     node_a.handle_msg2(packet_a).await;
 
     // Verify A promoted the outbound connection
-    assert_eq!(node_a.peer_count(), 1, "Node A should have 1 peer after msg2");
+    assert_eq!(
+        node_a.peer_count(),
+        1,
+        "Node A should have 1 peer after msg2"
+    );
     let peer_b_on_a = node_a
         .get_peer(&peer_b_node_addr)
         .expect("Node A should have peer B");
@@ -241,8 +243,8 @@ async fn test_two_node_handshake_udp() {
 #[tokio::test]
 async fn test_run_rx_loop_handshake() {
     use crate::config::UdpConfig;
-    use crate::transport::udp::UdpTransport;
     use crate::node::wire::build_msg1;
+    use crate::transport::udp::UdpTransport;
     use tokio::time::Duration;
 
     // === Setup: Two nodes with UDP transports on localhost ===
@@ -262,10 +264,8 @@ async fn test_run_rx_loop_handshake() {
     let (packet_tx_a, packet_rx_a) = packet_channel(64);
     let (packet_tx_b, packet_rx_b) = packet_channel(64);
 
-    let mut transport_a =
-        UdpTransport::new(transport_id_a, None, udp_config.clone(), packet_tx_a);
-    let mut transport_b =
-        UdpTransport::new(transport_id_b, None, udp_config, packet_tx_b);
+    let mut transport_a = UdpTransport::new(transport_id_a, None, udp_config.clone(), packet_tx_a);
+    let mut transport_b = UdpTransport::new(transport_id_b, None, udp_config, packet_tx_b);
 
     transport_a.start_async().await.unwrap();
     transport_b.start_async().await.unwrap();
@@ -290,20 +290,17 @@ async fn test_run_rx_loop_handshake() {
 
     // === Phase 1: Node A initiates handshake to Node B ===
 
-    let peer_b_identity =
-        PeerIdentity::from_pubkey_full(node_b.identity.pubkey_full());
+    let peer_b_identity = PeerIdentity::from_pubkey_full(node_b.identity.pubkey_full());
     let peer_b_node_addr = *peer_b_identity.node_addr();
 
     let link_id_a = node_a.allocate_link_id();
-    let mut conn_a = PeerConnection::outbound(
-        link_id_a,
-        peer_b_identity,
-        1000,
-    );
+    let mut conn_a = PeerConnection::outbound(link_id_a, peer_b_identity, 1000);
 
     let our_index_a = node_a.index_allocator.allocate().unwrap();
     let our_keypair_a = node_a.identity.keypair();
-    let noise_msg1 = conn_a.start_handshake(our_keypair_a, node_a.startup_epoch, 1000).unwrap();
+    let noise_msg1 = conn_a
+        .start_handshake(our_keypair_a, node_a.startup_epoch, 1000)
+        .unwrap();
     conn_a.set_our_index(our_index_a);
     conn_a.set_transport_id(transport_id_a);
     conn_a.set_source_addr(remote_addr_b.clone());
@@ -319,10 +316,9 @@ async fn test_run_rx_loop_handshake() {
     );
     node_a.links.insert(link_id_a, link_a);
     node_a.connections.insert(link_id_a, conn_a);
-    node_a.pending_outbound.insert(
-        (transport_id_a, our_index_a.as_u32()),
-        link_id_a,
-    );
+    node_a
+        .pending_outbound
+        .insert((transport_id_a, our_index_a.as_u32()), link_id_a);
 
     // Send msg1 from A to B over real UDP
     let transport = node_a.transports.get(&transport_id_a).unwrap();
@@ -350,12 +346,14 @@ async fn test_run_rx_loop_handshake() {
     }
 
     // Verify Node B promoted the inbound connection via rx loop dispatch
-    let peer_a_node_addr = *PeerIdentity::from_pubkey_full(
-        node_a.identity.pubkey_full(),
-    )
-    .node_addr();
+    let peer_a_node_addr =
+        *PeerIdentity::from_pubkey_full(node_a.identity.pubkey_full()).node_addr();
 
-    assert_eq!(node_b.peer_count(), 1, "Node B should have 1 peer after rx loop processed msg1");
+    assert_eq!(
+        node_b.peer_count(),
+        1,
+        "Node B should have 1 peer after rx loop processed msg1"
+    );
     let peer_a_on_b = node_b
         .get_peer(&peer_a_node_addr)
         .expect("Node B should have peer A");
@@ -390,7 +388,11 @@ async fn test_run_rx_loop_handshake() {
     }
 
     // Verify Node A promoted the outbound connection via rx loop dispatch
-    assert_eq!(node_a.peer_count(), 1, "Node A should have 1 peer after rx loop processed msg2");
+    assert_eq!(
+        node_a.peer_count(),
+        1,
+        "Node A should have 1 peer after rx loop processed msg2"
+    );
     let peer_b_on_a = node_a
         .get_peer(&peer_b_node_addr)
         .expect("Node A should have peer B");
@@ -432,9 +434,9 @@ async fn test_run_rx_loop_handshake() {
 #[tokio::test]
 async fn test_cross_connection_both_initiate() {
     use crate::config::UdpConfig;
-    use crate::transport::udp::UdpTransport;
     use crate::node::wire::build_msg1;
-    use tokio::time::{timeout, Duration};
+    use crate::transport::udp::UdpTransport;
+    use tokio::time::{Duration, timeout};
 
     // === Setup: Two nodes with UDP transports on localhost ===
 
@@ -453,10 +455,8 @@ async fn test_cross_connection_both_initiate() {
     let (packet_tx_a, mut packet_rx_a) = packet_channel(64);
     let (packet_tx_b, mut packet_rx_b) = packet_channel(64);
 
-    let mut transport_a =
-        UdpTransport::new(transport_id_a, None, udp_config.clone(), packet_tx_a);
-    let mut transport_b =
-        UdpTransport::new(transport_id_b, None, udp_config, packet_tx_b);
+    let mut transport_a = UdpTransport::new(transport_id_a, None, udp_config.clone(), packet_tx_a);
+    let mut transport_b = UdpTransport::new(transport_id_b, None, udp_config, packet_tx_b);
 
     transport_a.start_async().await.unwrap();
     transport_b.start_async().await.unwrap();
@@ -474,11 +474,9 @@ async fn test_cross_connection_both_initiate() {
         .insert(transport_id_b, TransportHandle::Udp(transport_b));
 
     // Peer identities (must use full key for ECDH parity)
-    let peer_b_identity =
-        PeerIdentity::from_pubkey_full(node_b.identity.pubkey_full());
+    let peer_b_identity = PeerIdentity::from_pubkey_full(node_b.identity.pubkey_full());
     let peer_b_node_addr = *peer_b_identity.node_addr();
-    let peer_a_identity =
-        PeerIdentity::from_pubkey_full(node_a.identity.pubkey_full());
+    let peer_a_identity = PeerIdentity::from_pubkey_full(node_a.identity.pubkey_full());
     let peer_a_node_addr = *peer_a_identity.node_addr();
 
     // === Phase 1: Both nodes initiate handshakes (simulate auto_connect) ===
@@ -488,7 +486,9 @@ async fn test_cross_connection_both_initiate() {
     let mut conn_a = PeerConnection::outbound(link_id_a_out, peer_b_identity, 1000);
     let our_index_a = node_a.index_allocator.allocate().unwrap();
     let our_keypair_a = node_a.identity.keypair();
-    let noise_msg1_a = conn_a.start_handshake(our_keypair_a, node_a.startup_epoch, 1000).unwrap();
+    let noise_msg1_a = conn_a
+        .start_handshake(our_keypair_a, node_a.startup_epoch, 1000)
+        .unwrap();
     conn_a.set_our_index(our_index_a);
     conn_a.set_transport_id(transport_id_a);
     conn_a.set_source_addr(remote_addr_b.clone());
@@ -496,20 +496,29 @@ async fn test_cross_connection_both_initiate() {
     let wire_msg1_a = build_msg1(our_index_a, &noise_msg1_a);
 
     let link_a_out = Link::connectionless(
-        link_id_a_out, transport_id_a, remote_addr_b.clone(),
-        LinkDirection::Outbound, Duration::from_millis(100),
+        link_id_a_out,
+        transport_id_a,
+        remote_addr_b.clone(),
+        LinkDirection::Outbound,
+        Duration::from_millis(100),
     );
     node_a.links.insert(link_id_a_out, link_a_out);
-    node_a.addr_to_link.insert((transport_id_a, remote_addr_b.clone()), link_id_a_out);
+    node_a
+        .addr_to_link
+        .insert((transport_id_a, remote_addr_b.clone()), link_id_a_out);
     node_a.connections.insert(link_id_a_out, conn_a);
-    node_a.pending_outbound.insert((transport_id_a, our_index_a.as_u32()), link_id_a_out);
+    node_a
+        .pending_outbound
+        .insert((transport_id_a, our_index_a.as_u32()), link_id_a_out);
 
     // Node B initiates to Node A
     let link_id_b_out = node_b.allocate_link_id();
     let mut conn_b = PeerConnection::outbound(link_id_b_out, peer_a_identity, 1000);
     let our_index_b = node_b.index_allocator.allocate().unwrap();
     let our_keypair_b = node_b.identity.keypair();
-    let noise_msg1_b = conn_b.start_handshake(our_keypair_b, node_b.startup_epoch, 1000).unwrap();
+    let noise_msg1_b = conn_b
+        .start_handshake(our_keypair_b, node_b.startup_epoch, 1000)
+        .unwrap();
     conn_b.set_our_index(our_index_b);
     conn_b.set_transport_id(transport_id_b);
     conn_b.set_source_addr(remote_addr_a.clone());
@@ -517,20 +526,33 @@ async fn test_cross_connection_both_initiate() {
     let wire_msg1_b = build_msg1(our_index_b, &noise_msg1_b);
 
     let link_b_out = Link::connectionless(
-        link_id_b_out, transport_id_b, remote_addr_a.clone(),
-        LinkDirection::Outbound, Duration::from_millis(100),
+        link_id_b_out,
+        transport_id_b,
+        remote_addr_a.clone(),
+        LinkDirection::Outbound,
+        Duration::from_millis(100),
     );
     node_b.links.insert(link_id_b_out, link_b_out);
-    node_b.addr_to_link.insert((transport_id_b, remote_addr_a.clone()), link_id_b_out);
+    node_b
+        .addr_to_link
+        .insert((transport_id_b, remote_addr_a.clone()), link_id_b_out);
     node_b.connections.insert(link_id_b_out, conn_b);
-    node_b.pending_outbound.insert((transport_id_b, our_index_b.as_u32()), link_id_b_out);
+    node_b
+        .pending_outbound
+        .insert((transport_id_b, our_index_b.as_u32()), link_id_b_out);
 
     // Both send msg1 over UDP
     let transport = node_a.transports.get(&transport_id_a).unwrap();
-    transport.send(&remote_addr_b, &wire_msg1_a).await.expect("A send msg1");
+    transport
+        .send(&remote_addr_b, &wire_msg1_a)
+        .await
+        .expect("A send msg1");
 
     let transport = node_b.transports.get(&transport_id_b).unwrap();
-    transport.send(&remote_addr_a, &wire_msg1_b).await.expect("B send msg1");
+    transport
+        .send(&remote_addr_a, &wire_msg1_b)
+        .await
+        .expect("B send msg1");
 
     // === Phase 2: Both nodes receive the other's msg1 ===
     // Before the fix, addr_to_link would reject these because outbound links
@@ -538,21 +560,39 @@ async fn test_cross_connection_both_initiate() {
 
     // B receives A's msg1
     let packet_at_b = timeout(Duration::from_secs(1), packet_rx_b.recv())
-        .await.expect("Timeout").expect("Channel closed");
+        .await
+        .expect("Timeout")
+        .expect("Channel closed");
     node_b.handle_msg1(packet_at_b).await;
 
     // B should have promoted the inbound connection
-    assert_eq!(node_b.peer_count(), 1, "Node B should have 1 peer after processing A's msg1");
-    assert!(node_b.get_peer(&peer_a_node_addr).is_some(), "Node B should have peer A");
+    assert_eq!(
+        node_b.peer_count(),
+        1,
+        "Node B should have 1 peer after processing A's msg1"
+    );
+    assert!(
+        node_b.get_peer(&peer_a_node_addr).is_some(),
+        "Node B should have peer A"
+    );
 
     // A receives B's msg1
     let packet_at_a = timeout(Duration::from_secs(1), packet_rx_a.recv())
-        .await.expect("Timeout").expect("Channel closed");
+        .await
+        .expect("Timeout")
+        .expect("Channel closed");
     node_a.handle_msg1(packet_at_a).await;
 
     // A should have promoted the inbound connection
-    assert_eq!(node_a.peer_count(), 1, "Node A should have 1 peer after processing B's msg1");
-    assert!(node_a.get_peer(&peer_b_node_addr).is_some(), "Node A should have peer B");
+    assert_eq!(
+        node_a.peer_count(),
+        1,
+        "Node A should have 1 peer after processing B's msg1"
+    );
+    assert!(
+        node_a.get_peer(&peer_b_node_addr).is_some(),
+        "Node A should have peer B"
+    );
 
     // === Phase 3: Both nodes receive msg2 responses ===
     // The msg2 was sent during handle_msg1 processing. When handle_msg2
@@ -560,21 +600,37 @@ async fn test_cross_connection_both_initiate() {
 
     // A receives B's msg2 (response to A's original msg1)
     let msg2_at_a = timeout(Duration::from_secs(1), packet_rx_a.recv())
-        .await.expect("Timeout waiting for msg2 at A").expect("Channel closed");
+        .await
+        .expect("Timeout waiting for msg2 at A")
+        .expect("Channel closed");
     node_a.handle_msg2(msg2_at_a).await;
 
     // B receives A's msg2 (response to B's original msg1)
     let msg2_at_b = timeout(Duration::from_secs(1), packet_rx_b.recv())
-        .await.expect("Timeout waiting for msg2 at B").expect("Channel closed");
+        .await
+        .expect("Timeout waiting for msg2 at B")
+        .expect("Channel closed");
     node_b.handle_msg2(msg2_at_b).await;
 
     // === Verification ===
     // Both nodes should have exactly 1 peer each after cross-connection resolution
-    assert_eq!(node_a.peer_count(), 1, "Node A should have exactly 1 peer after cross-connection");
-    assert_eq!(node_b.peer_count(), 1, "Node B should have exactly 1 peer after cross-connection");
+    assert_eq!(
+        node_a.peer_count(),
+        1,
+        "Node A should have exactly 1 peer after cross-connection"
+    );
+    assert_eq!(
+        node_b.peer_count(),
+        1,
+        "Node B should have exactly 1 peer after cross-connection"
+    );
 
-    let peer_b_on_a = node_a.get_peer(&peer_b_node_addr).expect("A should have peer B");
-    let peer_a_on_b = node_b.get_peer(&peer_a_node_addr).expect("B should have peer A");
+    let peer_b_on_a = node_a
+        .get_peer(&peer_b_node_addr)
+        .expect("A should have peer B");
+    let peer_a_on_b = node_b
+        .get_peer(&peer_a_node_addr)
+        .expect("B should have peer A");
 
     assert!(peer_b_on_a.has_session(), "Peer B on A should have session");
     assert!(peer_a_on_b.has_session(), "Peer A on B should have session");
@@ -611,25 +667,35 @@ async fn test_stale_connection_cleanup() {
     // Allocate session index and set transport info
     let our_index = node.index_allocator.allocate().unwrap();
     let our_keypair = node.identity.keypair();
-    let _noise_msg1 = conn.start_handshake(our_keypair, node.startup_epoch, past_time_ms).unwrap();
+    let _noise_msg1 = conn
+        .start_handshake(our_keypair, node.startup_epoch, past_time_ms)
+        .unwrap();
     conn.set_our_index(our_index);
     conn.set_transport_id(transport_id);
     conn.set_source_addr(remote_addr.clone());
 
     // Set up all the state that initiate_peer_connection would create
     let link = Link::connectionless(
-        link_id, transport_id, remote_addr.clone(),
-        LinkDirection::Outbound, Duration::from_millis(100),
+        link_id,
+        transport_id,
+        remote_addr.clone(),
+        LinkDirection::Outbound,
+        Duration::from_millis(100),
     );
     node.links.insert(link_id, link);
-    node.addr_to_link.insert((transport_id, remote_addr.clone()), link_id);
+    node.addr_to_link
+        .insert((transport_id, remote_addr.clone()), link_id);
     node.connections.insert(link_id, conn);
-    node.pending_outbound.insert((transport_id, our_index.as_u32()), link_id);
+    node.pending_outbound
+        .insert((transport_id, our_index.as_u32()), link_id);
 
     // Verify state before timeout check
     assert_eq!(node.connection_count(), 1);
     assert_eq!(node.link_count(), 1);
-    assert!(node.pending_outbound.contains_key(&(transport_id, our_index.as_u32())));
+    assert!(
+        node.pending_outbound
+            .contains_key(&(transport_id, our_index.as_u32()))
+    );
     assert_eq!(node.index_allocator.count(), 1);
 
     // Connection was created at time 1000ms. check_timeouts uses SystemTime::now(),
@@ -637,13 +703,27 @@ async fn test_stale_connection_cleanup() {
     node.check_timeouts();
 
     // Verify everything was cleaned up
-    assert_eq!(node.connection_count(), 0, "Stale connection should be removed");
+    assert_eq!(
+        node.connection_count(),
+        0,
+        "Stale connection should be removed"
+    );
     assert_eq!(node.link_count(), 0, "Stale link should be removed");
-    assert!(!node.pending_outbound.contains_key(&(transport_id, our_index.as_u32())),
-        "pending_outbound should be cleaned up");
-    assert_eq!(node.index_allocator.count(), 0, "Session index should be freed");
-    assert!(!node.addr_to_link.contains_key(&(transport_id, remote_addr)),
-        "addr_to_link should be cleaned up");
+    assert!(
+        !node
+            .pending_outbound
+            .contains_key(&(transport_id, our_index.as_u32())),
+        "pending_outbound should be cleaned up"
+    );
+    assert_eq!(
+        node.index_allocator.count(),
+        0,
+        "Session index should be freed"
+    );
+    assert!(
+        !node.addr_to_link.contains_key(&(transport_id, remote_addr)),
+        "addr_to_link should be cleaned up"
+    );
 }
 
 /// Test that failed connections are cleaned up by check_timeouts().
@@ -665,29 +745,44 @@ async fn test_failed_connection_cleanup() {
 
     let our_index = node.index_allocator.allocate().unwrap();
     let our_keypair = node.identity.keypair();
-    let _noise_msg1 = conn.start_handshake(our_keypair, node.startup_epoch, now_ms).unwrap();
+    let _noise_msg1 = conn
+        .start_handshake(our_keypair, node.startup_epoch, now_ms)
+        .unwrap();
     conn.set_our_index(our_index);
     conn.set_transport_id(transport_id);
     conn.set_source_addr(remote_addr.clone());
     conn.mark_failed(); // Simulate send failure
 
     let link = Link::connectionless(
-        link_id, transport_id, remote_addr.clone(),
-        LinkDirection::Outbound, Duration::from_millis(100),
+        link_id,
+        transport_id,
+        remote_addr.clone(),
+        LinkDirection::Outbound,
+        Duration::from_millis(100),
     );
     node.links.insert(link_id, link);
-    node.addr_to_link.insert((transport_id, remote_addr.clone()), link_id);
+    node.addr_to_link
+        .insert((transport_id, remote_addr.clone()), link_id);
     node.connections.insert(link_id, conn);
-    node.pending_outbound.insert((transport_id, our_index.as_u32()), link_id);
+    node.pending_outbound
+        .insert((transport_id, our_index.as_u32()), link_id);
 
     assert_eq!(node.connection_count(), 1);
 
     // Failed connections should be cleaned up immediately regardless of age
     node.check_timeouts();
 
-    assert_eq!(node.connection_count(), 0, "Failed connection should be removed");
+    assert_eq!(
+        node.connection_count(),
+        0,
+        "Failed connection should be removed"
+    );
     assert_eq!(node.link_count(), 0, "Failed link should be removed");
-    assert_eq!(node.index_allocator.count(), 0, "Session index should be freed");
+    assert_eq!(
+        node.index_allocator.count(),
+        0,
+        "Session index should be freed"
+    );
 }
 
 /// Test that msg1 bytes are stored on connection for resend.
@@ -710,7 +805,9 @@ async fn test_msg1_stored_for_resend() {
 
     let our_index = node.index_allocator.allocate().unwrap();
     let our_keypair = node.identity.keypair();
-    let noise_msg1 = conn.start_handshake(our_keypair, node.startup_epoch, now_ms).unwrap();
+    let noise_msg1 = conn
+        .start_handshake(our_keypair, node.startup_epoch, now_ms)
+        .unwrap();
     conn.set_our_index(our_index);
     conn.set_transport_id(transport_id);
     conn.set_source_addr(remote_addr.clone());
@@ -741,7 +838,9 @@ async fn test_resend_scheduling() {
 
     let our_index = node.index_allocator.allocate().unwrap();
     let our_keypair = node.identity.keypair();
-    let noise_msg1 = conn.start_handshake(our_keypair, node.startup_epoch, now_ms).unwrap();
+    let noise_msg1 = conn
+        .start_handshake(our_keypair, node.startup_epoch, now_ms)
+        .unwrap();
     conn.set_our_index(our_index);
     conn.set_transport_id(transport_id);
     conn.set_source_addr(remote_addr.clone());
@@ -751,12 +850,17 @@ async fn test_resend_scheduling() {
     conn.set_handshake_msg1(wire_msg1, now_ms + 1000);
 
     let link = Link::connectionless(
-        link_id, transport_id, remote_addr.clone(),
-        LinkDirection::Outbound, Duration::from_millis(100),
+        link_id,
+        transport_id,
+        remote_addr.clone(),
+        LinkDirection::Outbound,
+        Duration::from_millis(100),
     );
     node.links.insert(link_id, link);
-    node.addr_to_link.insert((transport_id, remote_addr), link_id);
-    node.pending_outbound.insert((transport_id, our_index.as_u32()), link_id);
+    node.addr_to_link
+        .insert((transport_id, remote_addr), link_id);
+    node.pending_outbound
+        .insert((transport_id, our_index.as_u32()), link_id);
     node.connections.insert(link_id, conn);
 
     // Before resend time: nothing should happen (no transport = can't send,
@@ -772,7 +876,11 @@ async fn test_resend_scheduling() {
     // No transport registered, so send fails — count stays 0.
     // That's the expected behavior (transport absence is a transient condition).
     let conn = node.connections.get(&link_id).unwrap();
-    assert_eq!(conn.resend_count(), 0, "No transport means no resend recorded");
+    assert_eq!(
+        conn.resend_count(),
+        0,
+        "No transport means no resend recorded"
+    );
 }
 
 /// Test that msg2 is stored on PeerConnection for responder resend.

src/node/tests/mod.rs

@@ -1,7 +1,7 @@
 use super::*;
-use crate::utils::index::SessionIndex;
-use crate::transport::{packet_channel, LinkDirection, TransportAddr};
 use crate::PeerIdentity;
+use crate::transport::{LinkDirection, TransportAddr, packet_channel};
+use crate::utils::index::SessionIndex;
 use std::time::Duration;
 
 mod bloom;
@@ -54,7 +54,9 @@ pub(super) fn make_completed_connection(
 
     // Run initiator side of handshake
     let our_keypair = node.identity.keypair();
-    let msg1 = conn.start_handshake(our_keypair, node.startup_epoch, current_time_ms).unwrap();
+    let msg1 = conn
+        .start_handshake(our_keypair, node.startup_epoch, current_time_ms)
+        .unwrap();
 
     // Run responder side to generate msg2
     let mut resp_conn = PeerConnection::inbound(LinkId::new(999), current_time_ms);

src/node/tests/routing.rs

@@ -7,8 +7,8 @@ use super::*;
 use crate::bloom::BloomFilter;
 use crate::tree::{ParentDeclaration, TreeCoordinate};
 use spanning_tree::{
-    cleanup_nodes, drain_all_packets, generate_random_edges, initiate_handshake, make_test_node,
-    run_tree_test, verify_tree_convergence, TestNode,
+    TestNode, cleanup_nodes, drain_all_packets, generate_random_edges, initiate_handshake,
+    make_test_node, run_tree_test, verify_tree_convergence,
 };
 use std::collections::HashSet;
 
@@ -83,8 +83,7 @@ fn test_routing_bloom_filter_hit() {
 
     // Destination not directly connected — placed under peer1 in the tree
     let dest = make_node_addr(99);
-    let dest_coords =
-        TreeCoordinate::from_addrs(vec![dest, peer1_addr, my_addr]).unwrap();
+    let dest_coords = TreeCoordinate::from_addrs(vec![dest, peer1_addr, my_addr]).unwrap();
     let now_ms = std::time::SystemTime::now()
         .duration_since(std::time::UNIX_EPOCH)
         .map(|d| d.as_millis() as u64)
@@ -126,17 +125,14 @@ fn test_routing_bloom_filter_multiple_hits_tiebreak() {
     // Set up tree: we are root, all peers are our children (equidistant)
     for &addr in &peer_addrs {
         let coords = TreeCoordinate::from_addrs(vec![addr, my_addr]).unwrap();
-        node.tree_state_mut().update_peer(
-            ParentDeclaration::new(addr, my_addr, 1, 1000),
-            coords,
-        );
+        node.tree_state_mut()
+            .update_peer(ParentDeclaration::new(addr, my_addr, 1, 1000), coords);
     }
 
     // Destination placed under the first peer (arbitrary — all peers are
     // equidistant from dest since dest is 2 hops from root via any child)
     let dest = make_node_addr(99);
-    let dest_coords =
-        TreeCoordinate::from_addrs(vec![dest, peer_addrs[0], my_addr]).unwrap();
+    let dest_coords = TreeCoordinate::from_addrs(vec![dest, peer_addrs[0], my_addr]).unwrap();
     let now_ms = std::time::SystemTime::now()
         .duration_since(std::time::UNIX_EPOCH)
         .map(|d| d.as_millis() as u64)
@@ -187,8 +183,7 @@ fn test_routing_tree_fallback() {
 
     // Destination: a node under our peer in the tree
     let dest = make_node_addr(99);
-    let dest_coords =
-        TreeCoordinate::from_addrs(vec![dest, peer_addr, my_addr]).unwrap();
+    let dest_coords = TreeCoordinate::from_addrs(vec![dest, peer_addr, my_addr]).unwrap();
 
     // Put dest coords in the cache
     let now_ms = std::time::SystemTime::now()
@@ -239,8 +234,7 @@ fn test_routing_refreshes_coord_cache_ttl() {
 
     // Set up tree coordinates
     let dest = make_node_addr(99);
-    let dest_coords =
-        TreeCoordinate::from_addrs(vec![dest, peer_addr, my_addr]).unwrap();
+    let dest_coords = TreeCoordinate::from_addrs(vec![dest, peer_addr, my_addr]).unwrap();
     node.tree_state_mut().update_peer(
         ParentDeclaration::new(peer_addr, my_addr, 1, 1000),
         TreeCoordinate::from_addrs(vec![peer_addr, my_addr]).unwrap(),
@@ -252,7 +246,8 @@ fn test_routing_refreshes_coord_cache_ttl() {
         .map(|d| d.as_millis() as u64)
         .unwrap_or(0);
     let short_ttl = 10_000; // 10 seconds
-    node.coord_cache_mut().insert_with_ttl(dest, dest_coords, now_ms, short_ttl);
+    node.coord_cache_mut()
+        .insert_with_ttl(dest, dest_coords, now_ms, short_ttl);
     let original_expiry = node.coord_cache().get_entry(&dest).unwrap().expires_at();
 
     // find_next_hop should succeed and refresh TTL to now + default_ttl (300s)
@@ -263,7 +258,8 @@ fn test_routing_refreshes_coord_cache_ttl() {
     assert!(
         new_expiry > original_expiry,
         "find_next_hop should refresh the coord_cache TTL: original={}, new={}",
-        original_expiry, new_expiry,
+        original_expiry,
+        new_expiry,
     );
 }
 
@@ -384,11 +380,7 @@ async fn test_routing_chain_topology() {
     // Verify tree convergence
     let root = nodes.iter().map(|n| *n.node.node_addr()).min().unwrap();
     for tn in &nodes {
-        assert_eq!(
-            *tn.node.tree_state().root(),
-            root,
-            "Tree not converged"
-        );
+        assert_eq!(*tn.node.tree_state().root(), root, "Tree not converged");
     }
 
     // Populate coord caches: each node caches the far-end node's coords
@@ -453,8 +445,13 @@ async fn test_routing_bloom_preferred_over_tree() {
     // filter routing selects peer2 (strictly closer to dest than us).
     let dest = make_node_addr(99);
     let peer2_addr = *nodes[2].node.node_addr();
-    let mut dest_path: Vec<NodeAddr> =
-        nodes[2].node.tree_state().my_coords().node_addrs().copied().collect();
+    let mut dest_path: Vec<NodeAddr> = nodes[2]
+        .node
+        .tree_state()
+        .my_coords()
+        .node_addrs()
+        .copied()
+        .collect();
     dest_path.insert(0, dest);
     let dest_coords = TreeCoordinate::from_addrs(dest_path).unwrap();
     let now_ms = std::time::SystemTime::now()
@@ -602,13 +599,20 @@ async fn test_routing_reachability_100_nodes() {
     // Collect all (addr, coords) pairs first to avoid borrow issues
     let all_coords: Vec<(NodeAddr, TreeCoordinate)> = nodes
         .iter()
-        .map(|tn| (*tn.node.node_addr(), tn.node.tree_state().my_coords().clone()))
+        .map(|tn| {
+            (
+                *tn.node.node_addr(),
+                tn.node.tree_state().my_coords().clone(),
+            )
+        })
         .collect();
 
     for node in &mut nodes {
         for (addr, coords) in &all_coords {
             if addr != node.node.node_addr() {
-                node.node.coord_cache_mut().insert(*addr, coords.clone(), now_ms);
+                node.node
+                    .coord_cache_mut()
+                    .insert(*addr, coords.clone(), now_ms);
             }
         }
     }
@@ -654,10 +658,7 @@ async fn test_routing_reachability_100_nodes() {
         0.0
     };
 
-    eprintln!(
-        "\n  === Routing Reachability ({} nodes) ===",
-        NUM_NODES
-    );
+    eprintln!("\n  === Routing Reachability ({} nodes) ===", NUM_NODES);
     eprintln!(
         "  Pairs tested: {} | Delivered: {} | Failed: {} | Loops: {}",
         total_pairs,
@@ -665,10 +666,7 @@ async fn test_routing_reachability_100_nodes() {
         failures.len(),
         loops.len()
     );
-    eprintln!(
-        "  Hops: avg={:.1} max={}",
-        avg_hops, max_hops
-    );
+    eprintln!("  Hops: avg={:.1} max={}", avg_hops, max_hops);
 
     if !failures.is_empty() {
         let show = failures.len().min(10);
@@ -736,13 +734,20 @@ async fn test_routing_stops_after_peer_removal() {
 
     let all_coords: Vec<(NodeAddr, crate::tree::TreeCoordinate)> = nodes
         .iter()
-        .map(|tn| (*tn.node.node_addr(), tn.node.tree_state().my_coords().clone()))
+        .map(|tn| {
+            (
+                *tn.node.node_addr(),
+                tn.node.tree_state().my_coords().clone(),
+            )
+        })
         .collect();
 
     for node in &mut nodes {
         for (addr, coords) in &all_coords {
             if addr != node.node.node_addr() {
-                node.node.coord_cache_mut().insert(*addr, coords.clone(), now_ms);
+                node.node
+                    .coord_cache_mut()
+                    .insert(*addr, coords.clone(), now_ms);
             }
         }
     }
@@ -792,9 +797,12 @@ async fn test_routing_stops_after_peer_removal() {
     // matters is that delivery does NOT succeed.
     match simulate_forwarding(&mut nodes, &addr_index, 0, 3) {
         ForwardResult::NoRoute { .. } => {} // Expected: can't reach node 3
-        ForwardResult::Loop { .. } => {} // Also acceptable: stale coords cause loop detection
+        ForwardResult::Loop { .. } => {}    // Also acceptable: stale coords cause loop detection
         ForwardResult::Delivered(hops) => {
-            panic!("Should NOT deliver after partition, but got delivery in {} hops", hops);
+            panic!(
+                "Should NOT deliver after partition, but got delivery in {} hops",
+                hops
+            );
         }
     }
 
@@ -905,7 +913,12 @@ async fn test_routing_source_only_coords_100_nodes() {
     // Collect all coords for injection
     let all_coords: Vec<(NodeAddr, crate::tree::TreeCoordinate)> = nodes
         .iter()
-        .map(|tn| (*tn.node.node_addr(), tn.node.tree_state().my_coords().clone()))
+        .map(|tn| {
+            (
+                *tn.node.node_addr(),
+                tn.node.tree_state().my_coords().clone(),
+            )
+        })
         .collect();
 
     let addr_index = build_addr_index(&nodes);
@@ -946,7 +959,10 @@ async fn test_routing_source_only_coords_100_nodes() {
             ForwardResult::Delivered(_) => source_only_delivered += 1,
             ForwardResult::NoRoute { .. } => source_only_failed += 1,
             ForwardResult::Loop { .. } => {
-                panic!("Routing loop detected with source-only coords: {} -> {}", src, dst);
+                panic!(
+                    "Routing loop detected with source-only coords: {} -> {}",
+                    src, dst
+                );
             }
         }
     }
@@ -977,7 +993,9 @@ async fn test_routing_source_only_coords_100_nodes() {
     for node in &mut nodes {
         for (addr, coords) in &all_coords {
             if addr != node.node.node_addr() {
-                node.node.coord_cache_mut().insert(*addr, coords.clone(), now_ms);
+                node.node
+                    .coord_cache_mut()
+                    .insert(*addr, coords.clone(), now_ms);
             }
         }
     }
@@ -996,4 +1014,3 @@ async fn test_routing_source_only_coords_100_nodes() {
 
     cleanup_nodes(&mut nodes).await;
 }
-

src/node/tests/session.rs

@@ -3,8 +3,8 @@
 use super::*;
 use crate::node::session::EndToEndState;
 use crate::node::tests::spanning_tree::{
-    cleanup_nodes, generate_random_edges, process_available_packets, run_tree_test,
-    run_tree_test_with_mtus, verify_tree_convergence, TestNode,
+    TestNode, cleanup_nodes, generate_random_edges, process_available_packets, run_tree_test,
+    run_tree_test_with_mtus, verify_tree_convergence,
 };
 use crate::protocol::{SessionAck, SessionDatagram};
 
@@ -50,10 +50,7 @@ fn test_session_entry_new_initiating() {
     let identity_a = Identity::generate();
     let identity_b = Identity::generate();
 
-    let handshake = HandshakeState::new_initiator(
-        identity_a.keypair(),
-        identity_b.pubkey_full(),
-    );
+    let handshake = HandshakeState::new_initiator(identity_a.keypair(), identity_b.pubkey_full());
 
     let entry = crate::node::session::SessionEntry::new(
         *identity_b.node_addr(),
@@ -77,10 +74,7 @@ fn test_session_entry_touch() {
     let identity_a = Identity::generate();
     let identity_b = Identity::generate();
 
-    let handshake = HandshakeState::new_initiator(
-        identity_a.keypair(),
-        identity_b.pubkey_full(),
-    );
+    let handshake = HandshakeState::new_initiator(identity_a.keypair(), identity_b.pubkey_full());
 
     let mut entry = crate::node::session::SessionEntry::new(
         *identity_b.node_addr(),
@@ -102,10 +96,8 @@ fn test_session_table_operations() {
     let mut node = make_node();
     let identity_b = Identity::generate();
 
-    let handshake = HandshakeState::new_initiator(
-        node.identity().keypair(),
-        identity_b.pubkey_full(),
-    );
+    let handshake =
+        HandshakeState::new_initiator(node.identity().keypair(), identity_b.pubkey_full());
 
     let dest_addr = *identity_b.node_addr();
     let entry = crate::node::session::SessionEntry::new(
@@ -151,12 +143,14 @@ async fn test_session_direct_peer_handshake() {
 
     // Node 0 should have a session in Initiating state
     assert_eq!(nodes[0].node.session_count(), 1);
-    assert!(nodes[0]
-        .node
-        .get_session(&node1_addr)
-        .unwrap()
-        .state()
-        .is_initiating());
+    assert!(
+        nodes[0]
+            .node
+            .get_session(&node1_addr)
+            .unwrap()
+            .state()
+            .is_initiating()
+    );
 
     // Process packets: SessionSetup arrives at Node 1
     tokio::time::sleep(Duration::from_millis(20)).await;
@@ -165,12 +159,14 @@ async fn test_session_direct_peer_handshake() {
 
     // Node 1 should now have a session in AwaitingMsg3 state (XK: identity not yet known)
     assert_eq!(nodes[1].node.session_count(), 1);
-    assert!(nodes[1]
-        .node
-        .get_session(&node0_addr)
-        .unwrap()
-        .state()
-        .is_awaiting_msg3());
+    assert!(
+        nodes[1]
+            .node
+            .get_session(&node0_addr)
+            .unwrap()
+            .state()
+            .is_awaiting_msg3()
+    );
 
     // Process packets: SessionAck arrives at Node 0, Node 0 sends SessionMsg3
     tokio::time::sleep(Duration::from_millis(20)).await;
@@ -178,12 +174,14 @@ async fn test_session_direct_peer_handshake() {
     assert!(count > 0, "Expected SessionAck packet to arrive");
 
     // Node 0 should now be Established (transitions after sending msg3)
-    assert!(nodes[0]
-        .node
-        .get_session(&node1_addr)
-        .unwrap()
-        .state()
-        .is_established());
+    assert!(
+        nodes[0]
+            .node
+            .get_session(&node1_addr)
+            .unwrap()
+            .state()
+            .is_established()
+    );
 
     // Process packets: SessionMsg3 arrives at Node 1
     tokio::time::sleep(Duration::from_millis(20)).await;
@@ -191,12 +189,14 @@ async fn test_session_direct_peer_handshake() {
     assert!(count > 0, "Expected SessionMsg3 packet to arrive");
 
     // Node 1 should now be Established (transitions after processing msg3)
-    assert!(nodes[1]
-        .node
-        .get_session(&node0_addr)
-        .unwrap()
-        .state()
-        .is_established());
+    assert!(
+        nodes[1]
+            .node
+            .get_session(&node0_addr)
+            .unwrap()
+            .state()
+            .is_established()
+    );
 
     cleanup_nodes(&mut nodes).await;
 }
@@ -226,18 +226,22 @@ async fn test_session_direct_peer_data_transfer() {
     tokio::time::sleep(Duration::from_millis(20)).await;
     process_available_packets(&mut nodes).await; // Msg3 → Node 1
 
-    assert!(nodes[0]
-        .node
-        .get_session(&node1_addr)
-        .unwrap()
-        .state()
-        .is_established());
-    assert!(nodes[1]
-        .node
-        .get_session(&node0_addr)
-        .unwrap()
-        .state()
-        .is_established());
+    assert!(
+        nodes[0]
+            .node
+            .get_session(&node1_addr)
+            .unwrap()
+            .state()
+            .is_established()
+    );
+    assert!(
+        nodes[1]
+            .node
+            .get_session(&node0_addr)
+            .unwrap()
+            .state()
+            .is_established()
+    );
 
     // Send data from Node 0 to Node 1
     let test_data = b"Hello, FIPS session!";
@@ -291,12 +295,14 @@ async fn test_session_3node_forwarded_handshake() {
         nodes[2].node.get_session(&node0_addr).is_some(),
         "Node 2 should have a session entry for Node 0"
     );
-    assert!(nodes[2]
-        .node
-        .get_session(&node0_addr)
-        .unwrap()
-        .state()
-        .is_awaiting_msg3());
+    assert!(
+        nodes[2]
+            .node
+            .get_session(&node0_addr)
+            .unwrap()
+            .state()
+            .is_awaiting_msg3()
+    );
 
     // Process: SessionAck: 2→1 (forwarded by transit B)
     tokio::time::sleep(Duration::from_millis(20)).await;
@@ -307,12 +313,14 @@ async fn test_session_3node_forwarded_handshake() {
     process_available_packets(&mut nodes).await;
 
     // Node 0 should now be Established (transitions after sending msg3)
-    assert!(nodes[0]
-        .node
-        .get_session(&node2_addr)
-        .unwrap()
-        .state()
-        .is_established());
+    assert!(
+        nodes[0]
+            .node
+            .get_session(&node2_addr)
+            .unwrap()
+            .state()
+            .is_established()
+    );
 
     // Process: SessionMsg3: 0→1 (forwarded by transit B)
     tokio::time::sleep(Duration::from_millis(20)).await;
@@ -323,12 +331,14 @@ async fn test_session_3node_forwarded_handshake() {
     process_available_packets(&mut nodes).await;
 
     // Node 2 should now be Established (transitions after processing msg3)
-    assert!(nodes[2]
-        .node
-        .get_session(&node0_addr)
-        .unwrap()
-        .state()
-        .is_established());
+    assert!(
+        nodes[2]
+            .node
+            .get_session(&node0_addr)
+            .unwrap()
+            .state()
+            .is_established()
+    );
 
     // Transit node B should NOT have a session
     assert_eq!(
@@ -389,12 +399,14 @@ async fn test_session_3node_forwarded_data() {
     }
 
     // Node 2 should be Established (transitioned during XK handshake msg3)
-    assert!(nodes[2]
-        .node
-        .get_session(&node0_addr)
-        .unwrap()
-        .state()
-        .is_established());
+    assert!(
+        nodes[2]
+            .node
+            .get_session(&node0_addr)
+            .unwrap()
+            .state()
+            .is_established()
+    );
 
     cleanup_nodes(&mut nodes).await;
 }
@@ -520,12 +532,7 @@ async fn test_session_100_nodes() {
     // Collect identities: (node_addr, pubkey) for all nodes
     let all_info: Vec<(NodeAddr, secp256k1::PublicKey)> = nodes
         .iter()
-        .map(|tn| {
-            (
-                *tn.node.node_addr(),
-                tn.node.identity().pubkey_full(),
-            )
-        })
+        .map(|tn| (*tn.node.node_addr(), tn.node.identity().pubkey_full()))
         .collect();
 
     // Each node picks one random target for its outbound session.
@@ -640,11 +647,7 @@ async fn test_session_100_nodes() {
         // (Responder should already be Established after XK msg3)
         let rev_payload = format!("rev-{}", pair_idx).into_bytes();
         let rev_ipv6 = build_ipv6_packet(&dst_fips, &src_fips, &rev_payload);
-        match nodes[dst]
-            .node
-            .send_ipv6_packet(&src_addr, &rev_ipv6)
-            .await
-        {
+        match nodes[dst].node.send_ipv6_packet(&src_addr, &rev_ipv6).await {
             Ok(()) => send_reverse_ok += 1,
             Err(_) => send_reverse_err += 1,
         }
@@ -723,10 +726,7 @@ async fn test_session_100_nodes() {
         }
     }
 
-    let session_counts: Vec<usize> = nodes
-        .iter()
-        .map(|tn| tn.node.session_count())
-        .collect();
+    let session_counts: Vec<usize> = nodes.iter().map(|tn| tn.node.session_count()).collect();
     let total_sessions: usize = session_counts.iter().sum();
     let min_sessions = *session_counts.iter().min().unwrap();
     let max_sessions = *session_counts.iter().max().unwrap();
@@ -770,10 +770,8 @@ async fn test_session_100_nodes() {
     };
 
     // Coord cache stats
-    let coord_cache_sizes: Vec<usize> = nodes
-        .iter()
-        .map(|tn| tn.node.coord_cache().len())
-        .collect();
+    let coord_cache_sizes: Vec<usize> =
+        nodes.iter().map(|tn| tn.node.coord_cache().len()).collect();
     let total_coord_entries: usize = coord_cache_sizes.iter().sum();
     let min_coord = *coord_cache_sizes.iter().min().unwrap();
     let max_coord = *coord_cache_sizes.iter().max().unwrap();
@@ -884,10 +882,7 @@ async fn test_session_100_nodes() {
 
     // === Assertions ===
 
-    assert_eq!(
-        send_forward_err, 0,
-        "All forward sends should succeed"
-    );
+    assert_eq!(send_forward_err, 0, "All forward sends should succeed");
     assert_eq!(
         send_reverse_err, 0,
         "All reverse sends should succeed (responder Established after XK msg3)"
@@ -915,7 +910,11 @@ async fn test_session_100_nodes() {
 // ============================================================================
 
 /// Build a minimal valid IPv6 packet with given source and destination addresses.
-fn build_ipv6_packet(src: &crate::FipsAddress, dst: &crate::FipsAddress, payload: &[u8]) -> Vec<u8> {
+fn build_ipv6_packet(
+    src: &crate::FipsAddress,
+    dst: &crate::FipsAddress,
+    payload: &[u8],
+) -> Vec<u8> {
     let payload_len = payload.len() as u16;
     let mut packet = vec![0u8; 40 + payload.len()];
     // Version (6) + traffic class high nibble
@@ -944,17 +943,14 @@ fn test_identity_cache_populated_on_promote() {
     let transport_id = TransportId::new(1);
     let link_id = LinkId::new(1);
 
-    let (conn, peer_identity) = make_completed_connection(
-        &mut node,
-        link_id,
-        transport_id,
-        1000,
-    );
+    let (conn, peer_identity) = make_completed_connection(&mut node, link_id, transport_id, 1000);
 
     node.add_connection(conn).unwrap();
 
     // Promote
-    let result = node.promote_connection(link_id, peer_identity, 2000).unwrap();
+    let result = node
+        .promote_connection(link_id, peer_identity, 2000)
+        .unwrap();
     assert!(matches!(result, PromotionResult::Promoted(_)));
 
     // Identity cache should contain the peer
@@ -962,7 +958,10 @@ fn test_identity_cache_populated_on_promote() {
     let mut prefix = [0u8; 15];
     prefix.copy_from_slice(&peer_addr.as_bytes()[0..15]);
     let cached = node.lookup_by_fips_prefix(&prefix);
-    assert!(cached.is_some(), "Identity cache should contain promoted peer");
+    assert!(
+        cached.is_some(),
+        "Identity cache should contain promoted peer"
+    );
     let (cached_addr, cached_pk) = cached.unwrap();
     assert_eq!(cached_addr, peer_addr);
     assert_eq!(cached_pk, peer_identity.pubkey_full());
@@ -986,7 +985,11 @@ async fn test_tun_outbound_established_session() {
     let dst_fips = crate::FipsAddress::from_node_addr(&node1_addr);
 
     // Establish session (XK: 3 messages — Setup, Ack, Msg3)
-    nodes[0].node.initiate_session(node1_addr, node1_pubkey).await.unwrap();
+    nodes[0]
+        .node
+        .initiate_session(node1_addr, node1_pubkey)
+        .await
+        .unwrap();
     tokio::time::sleep(Duration::from_millis(20)).await;
     process_available_packets(&mut nodes).await; // Setup → Node 1
     tokio::time::sleep(Duration::from_millis(20)).await;
@@ -994,7 +997,14 @@ async fn test_tun_outbound_established_session() {
     tokio::time::sleep(Duration::from_millis(20)).await;
     process_available_packets(&mut nodes).await; // Msg3 → Node 1
 
-    assert!(nodes[0].node.get_session(&node1_addr).unwrap().state().is_established());
+    assert!(
+        nodes[0]
+            .node
+            .get_session(&node1_addr)
+            .unwrap()
+            .state()
+            .is_established()
+    );
 
     // Install TUN receiver on Node 1
     let (tun_tx, tun_rx) = std::sync::mpsc::channel();
@@ -1013,7 +1023,10 @@ async fn test_tun_outbound_established_session() {
     // Verify plaintext arrived at Node 1's TUN
     let delivered: Vec<Vec<u8>> = std::iter::from_fn(|| tun_rx.try_recv().ok()).collect();
     assert_eq!(delivered.len(), 1, "Exactly one packet should be delivered");
-    assert_eq!(delivered[0], ipv6_packet, "Delivered packet should match original");
+    assert_eq!(
+        delivered[0], ipv6_packet,
+        "Delivered packet should match original"
+    );
 
     cleanup_nodes(&mut nodes).await;
 }
@@ -1049,17 +1062,35 @@ async fn test_tun_outbound_triggers_session_initiation() {
 
     // Session should now be initiating
     assert_eq!(nodes[0].node.session_count(), 1);
-    assert!(nodes[0].node.get_session(&node1_addr).unwrap().state().is_initiating());
+    assert!(
+        nodes[0]
+            .node
+            .get_session(&node1_addr)
+            .unwrap()
+            .state()
+            .is_initiating()
+    );
 
     // Drain packets until session established and queued packet delivered
     drain_to_quiescence(&mut nodes).await;
 
     // Session should be established on Node 0
-    assert!(nodes[0].node.get_session(&node1_addr).unwrap().state().is_established());
+    assert!(
+        nodes[0]
+            .node
+            .get_session(&node1_addr)
+            .unwrap()
+            .state()
+            .is_established()
+    );
 
     // Verify the queued packet was delivered to Node 1
     let delivered: Vec<Vec<u8>> = std::iter::from_fn(|| tun_rx.try_recv().ok()).collect();
-    assert_eq!(delivered.len(), 1, "Queued packet should be delivered after handshake");
+    assert_eq!(
+        delivered.len(),
+        1,
+        "Queued packet should be delivered after handshake"
+    );
     assert_eq!(delivered[0], ipv6_packet);
 
     cleanup_nodes(&mut nodes).await;
@@ -1087,12 +1118,19 @@ async fn test_tun_outbound_unknown_destination() {
 
     // Should receive ICMPv6 Destination Unreachable back on TUN
     let delivered: Vec<Vec<u8>> = std::iter::from_fn(|| tun_rx.try_recv().ok()).collect();
-    assert_eq!(delivered.len(), 1, "Should receive ICMPv6 Destination Unreachable");
+    assert_eq!(
+        delivered.len(),
+        1,
+        "Should receive ICMPv6 Destination Unreachable"
+    );
     // Verify it's an ICMPv6 Destination Unreachable (type 1, code 0)
     // ICMPv6 header starts at byte 40, type at byte 40, code at byte 41
     assert!(delivered[0].len() >= 48, "ICMPv6 response too short");
     assert_eq!(delivered[0][6], 58, "Next header should be ICMPv6 (58)");
-    assert_eq!(delivered[0][40], 1, "ICMPv6 type should be Destination Unreachable (1)");
+    assert_eq!(
+        delivered[0][40], 1,
+        "ICMPv6 type should be Destination Unreachable (1)"
+    );
     assert_eq!(delivered[0][41], 0, "ICMPv6 code should be No Route (0)");
 
     cleanup_nodes(&mut nodes).await;
@@ -1131,7 +1169,14 @@ async fn test_tun_outbound_3node_forwarded() {
     drain_to_quiescence(&mut nodes).await;
 
     // Session should be established
-    assert!(nodes[0].node.get_session(&node2_addr).unwrap().state().is_established());
+    assert!(
+        nodes[0]
+            .node
+            .get_session(&node2_addr)
+            .unwrap()
+            .state()
+            .is_established()
+    );
 
     // Verify packet delivered to Node 2
     let delivered: Vec<Vec<u8>> = std::iter::from_fn(|| tun_rx.try_recv().ok()).collect();
@@ -1170,16 +1215,34 @@ async fn test_tun_outbound_pending_queue_flush() {
 
     // First packet triggers session initiation, rest are queued
     assert_eq!(nodes[0].node.session_count(), 1);
-    assert!(nodes[0].node.get_session(&node1_addr).unwrap().state().is_initiating());
+    assert!(
+        nodes[0]
+            .node
+            .get_session(&node1_addr)
+            .unwrap()
+            .state()
+            .is_initiating()
+    );
 
     // Drain until session established and queued packets flushed
     drain_to_quiescence(&mut nodes).await;
 
-    assert!(nodes[0].node.get_session(&node1_addr).unwrap().state().is_established());
+    assert!(
+        nodes[0]
+            .node
+            .get_session(&node1_addr)
+            .unwrap()
+            .state()
+            .is_established()
+    );
 
     // All 5 packets should have been delivered
     let delivered: Vec<Vec<u8>> = std::iter::from_fn(|| tun_rx.try_recv().ok()).collect();
-    assert_eq!(delivered.len(), 5, "All 5 queued packets should be delivered");
+    assert_eq!(
+        delivered.len(),
+        5,
+        "All 5 queued packets should be delivered"
+    );
     for (i, pkt) in delivered.iter().enumerate() {
         assert_eq!(*pkt, packets[i], "Packet {} should match", i);
     }
@@ -1198,10 +1261,8 @@ fn make_noise_session(
 ) -> crate::noise::NoiseSession {
     use crate::noise::HandshakeState;
 
-    let mut initiator = HandshakeState::new_initiator(
-        our_identity.keypair(),
-        remote_identity.pubkey_full(),
-    );
+    let mut initiator =
+        HandshakeState::new_initiator(our_identity.keypair(), remote_identity.pubkey_full());
     let mut responder = HandshakeState::new_responder(remote_identity.keypair());
 
     // Set epochs for both sides (required for handshake message encryption)
@@ -1270,7 +1331,11 @@ fn test_purge_idle_sessions_keeps_active() {
     let now_ms = 92_000;
     node.purge_idle_sessions(now_ms);
 
-    assert_eq!(node.session_count(), 1, "Active session should survive purge");
+    assert_eq!(
+        node.session_count(),
+        1,
+        "Active session should survive purge"
+    );
 }
 
 #[test]
@@ -1281,10 +1346,7 @@ fn test_purge_idle_sessions_ignores_initiating() {
     let remote = Identity::generate();
     let remote_addr = *remote.node_addr();
 
-    let handshake = HandshakeState::new_initiator(
-        node.identity().keypair(),
-        remote.pubkey_full(),
-    );
+    let handshake = HandshakeState::new_initiator(node.identity().keypair(), remote.pubkey_full());
     let entry = crate::node::session::SessionEntry::new(
         remote_addr,
         remote.pubkey_full(),
@@ -1299,7 +1361,11 @@ fn test_purge_idle_sessions_ignores_initiating() {
     let now_ms = 1000 + 200_000;
     node.purge_idle_sessions(now_ms);
 
-    assert_eq!(node.session_count(), 1, "Initiating session should not be purged by idle timeout");
+    assert_eq!(
+        node.session_count(),
+        1,
+        "Initiating session should not be purged by idle timeout"
+    );
 }
 
 #[test]
@@ -1330,8 +1396,10 @@ fn test_purge_idle_sessions_cleans_pending_packets() {
     node.purge_idle_sessions(now_ms);
 
     assert_eq!(node.session_count(), 0);
-    assert!(!node.pending_tun_packets.contains_key(&remote_addr),
-        "Pending packets should be cleaned up with idle session");
+    assert!(
+        !node.pending_tun_packets.contains_key(&remote_addr),
+        "Pending packets should be cleaned up with idle session"
+    );
 }
 
 #[test]
@@ -1357,7 +1425,11 @@ fn test_purge_idle_sessions_disabled_when_zero() {
     let now_ms = 1000 + 1_000_000;
     node.purge_idle_sessions(now_ms);
 
-    assert_eq!(node.session_count(), 1, "Sessions should not be purged when idle timeout is disabled");
+    assert_eq!(
+        node.session_count(),
+        1,
+        "Sessions should not be purged when idle timeout is disabled"
+    );
 }
 
 #[test]
@@ -1386,8 +1458,11 @@ fn test_purge_idle_sessions_mmp_activity_does_not_prevent_purge() {
     let now_ms = 92_000;
     node.purge_idle_sessions(now_ms);
 
-    assert_eq!(node.session_count(), 0,
-        "Session with MMP-only activity should be purged");
+    assert_eq!(
+        node.session_count(),
+        0,
+        "Session with MMP-only activity should be purged"
+    );
 }
 
 // ============================================================================
@@ -1401,10 +1476,7 @@ fn test_coords_warmup_counter_default_zero_on_new() {
     let identity_a = Identity::generate();
     let identity_b = Identity::generate();
 
-    let handshake = HandshakeState::new_initiator(
-        identity_a.keypair(),
-        identity_b.pubkey_full(),
-    );
+    let handshake = HandshakeState::new_initiator(identity_a.keypair(), identity_b.pubkey_full());
 
     let entry = crate::node::session::SessionEntry::new(
         *identity_b.node_addr(),
@@ -1414,8 +1486,11 @@ fn test_coords_warmup_counter_default_zero_on_new() {
         true,
     );
 
-    assert_eq!(entry.coords_warmup_remaining(), 0,
-        "Counter should be 0 for non-Established sessions");
+    assert_eq!(
+        entry.coords_warmup_remaining(),
+        0,
+        "Counter should be 0 for non-Established sessions"
+    );
 }
 
 #[test]
@@ -1466,15 +1541,20 @@ fn test_coords_warmup_counter_decrement() {
         assert_eq!(entry.coords_warmup_remaining(), expected);
     }
 
-    assert_eq!(entry.coords_warmup_remaining(), 0,
-        "Counter should reach 0 after N decrements");
+    assert_eq!(
+        entry.coords_warmup_remaining(),
+        0,
+        "Counter should reach 0 after N decrements"
+    );
 }
 
 #[test]
 fn test_coords_warmup_config_default() {
     let config = crate::config::Config::new();
-    assert_eq!(config.node.session.coords_warmup_packets, 5,
-        "Default coords_warmup_packets should be 5");
+    assert_eq!(
+        config.node.session.coords_warmup_packets, 5,
+        "Default coords_warmup_packets should be 5"
+    );
 }
 
 // ============================================================================
@@ -1493,11 +1573,13 @@ fn test_identity_cache_lru_eviction() {
     // Insert first two with explicit timestamps to ensure deterministic ordering
     let mut prefix1 = [0u8; 15];
     prefix1.copy_from_slice(&id1.node_addr().as_bytes()[0..15]);
-    node.identity_cache.insert(prefix1, (*id1.node_addr(), id1.pubkey_full(), 1000));
+    node.identity_cache
+        .insert(prefix1, (*id1.node_addr(), id1.pubkey_full(), 1000));
 
     let mut prefix2 = [0u8; 15];
     prefix2.copy_from_slice(&id2.node_addr().as_bytes()[0..15]);
-    node.identity_cache.insert(prefix2, (*id2.node_addr(), id2.pubkey_full(), 2000));
+    node.identity_cache
+        .insert(prefix2, (*id2.node_addr(), id2.pubkey_full(), 2000));
 
     assert_eq!(node.identity_cache_len(), 2);
 
@@ -1505,13 +1587,17 @@ fn test_identity_cache_lru_eviction() {
     node.register_identity(*id3.node_addr(), id3.pubkey_full());
     assert_eq!(node.identity_cache_len(), 2);
 
-    assert!(node.lookup_by_fips_prefix(&prefix1).is_none(),
-        "Oldest entry should have been evicted");
+    assert!(
+        node.lookup_by_fips_prefix(&prefix1).is_none(),
+        "Oldest entry should have been evicted"
+    );
 
     let mut prefix3 = [0u8; 15];
     prefix3.copy_from_slice(&id3.node_addr().as_bytes()[0..15]);
-    assert!(node.lookup_by_fips_prefix(&prefix3).is_some(),
-        "Newest entry should be present");
+    assert!(
+        node.lookup_by_fips_prefix(&prefix3).is_some(),
+        "Newest entry should be present"
+    );
 }
 
 #[test]
@@ -1546,10 +1632,7 @@ fn test_session_entry_handshake_payload_storage() {
     let identity_a = Identity::generate();
     let identity_b = Identity::generate();
 
-    let handshake = HandshakeState::new_initiator(
-        identity_a.keypair(),
-        identity_b.pubkey_full(),
-    );
+    let handshake = HandshakeState::new_initiator(identity_a.keypair(), identity_b.pubkey_full());
 
     let mut entry = crate::node::session::SessionEntry::new(
         *identity_b.node_addr(),
@@ -1581,10 +1664,7 @@ fn test_session_entry_resend_tracking() {
     let identity_a = Identity::generate();
     let identity_b = Identity::generate();
 
-    let handshake = HandshakeState::new_initiator(
-        identity_a.keypair(),
-        identity_b.pubkey_full(),
-    );
+    let handshake = HandshakeState::new_initiator(identity_a.keypair(), identity_b.pubkey_full());
 
     let mut entry = crate::node::session::SessionEntry::new(
         *identity_b.node_addr(),
@@ -1615,10 +1695,7 @@ fn test_session_entry_clear_handshake_payload() {
     let identity_a = Identity::generate();
     let identity_b = Identity::generate();
 
-    let handshake = HandshakeState::new_initiator(
-        identity_a.keypair(),
-        identity_b.pubkey_full(),
-    );
+    let handshake = HandshakeState::new_initiator(identity_a.keypair(), identity_b.pubkey_full());
 
     let mut entry = crate::node::session::SessionEntry::new(
         *identity_b.node_addr(),
@@ -1649,10 +1726,8 @@ async fn test_session_handshake_timeout() {
     let mut node = make_node();
 
     let identity_b = Identity::generate();
-    let handshake = HandshakeState::new_initiator(
-        node.identity.keypair(),
-        identity_b.pubkey_full(),
-    );
+    let handshake =
+        HandshakeState::new_initiator(node.identity.keypair(), identity_b.pubkey_full());
 
     let dest_addr = *identity_b.node_addr();
 
@@ -1672,12 +1747,18 @@ async fn test_session_handshake_timeout() {
     let timeout_secs = node.config.node.rate_limit.handshake_timeout_secs;
     let before_timeout = 1000 + timeout_secs * 1000 - 1;
     node.resend_pending_session_handshakes(before_timeout).await;
-    assert!(node.sessions.contains_key(&dest_addr), "Session should survive before timeout");
+    assert!(
+        node.sessions.contains_key(&dest_addr),
+        "Session should survive before timeout"
+    );
 
     // After timeout: session should be removed
     let after_timeout = 1000 + timeout_secs * 1000 + 1;
     node.resend_pending_session_handshakes(after_timeout).await;
-    assert!(!node.sessions.contains_key(&dest_addr), "Timed-out session should be removed");
+    assert!(
+        !node.sessions.contains_key(&dest_addr),
+        "Timed-out session should be removed"
+    );
 }
 
 /// Test that session handshake timeout removes stale AwaitingMsg3 sessions.
@@ -1690,9 +1771,7 @@ async fn test_session_awaiting_msg3_timeout() {
     let identity_a = Identity::generate();
     let identity_b = Identity::generate();
 
-    let handshake = HandshakeState::new_xk_responder(
-        identity_b.keypair(),
-    );
+    let handshake = HandshakeState::new_xk_responder(identity_b.keypair());
 
     let src_addr = *identity_a.node_addr();
 
@@ -1712,7 +1791,10 @@ async fn test_session_awaiting_msg3_timeout() {
     let timeout_secs = node.config.node.rate_limit.handshake_timeout_secs;
     let after_timeout = 1000 + timeout_secs * 1000 + 1;
     node.resend_pending_session_handshakes(after_timeout).await;
-    assert!(!node.sessions.contains_key(&src_addr), "Timed-out AwaitingMsg3 session should be removed");
+    assert!(
+        !node.sessions.contains_key(&src_addr),
+        "Timed-out AwaitingMsg3 session should be removed"
+    );
 }
 
 #[tokio::test]
@@ -1734,7 +1816,11 @@ async fn test_tun_outbound_path_mtu_generates_ptb() {
     let dst_fips = crate::FipsAddress::from_node_addr(&node1_addr);
 
     // Establish session (XK: 3 messages — Setup, Ack, Msg3)
-    nodes[0].node.initiate_session(node1_addr, node1_pubkey).await.unwrap();
+    nodes[0]
+        .node
+        .initiate_session(node1_addr, node1_pubkey)
+        .await
+        .unwrap();
     tokio::time::sleep(Duration::from_millis(20)).await;
     process_available_packets(&mut nodes).await;
     tokio::time::sleep(Duration::from_millis(20)).await;
@@ -1742,7 +1828,14 @@ async fn test_tun_outbound_path_mtu_generates_ptb() {
     tokio::time::sleep(Duration::from_millis(20)).await;
     process_available_packets(&mut nodes).await;
 
-    assert!(nodes[0].node.get_session(&node1_addr).unwrap().state().is_established());
+    assert!(
+        nodes[0]
+            .node
+            .get_session(&node1_addr)
+            .unwrap()
+            .state()
+            .is_established()
+    );
 
     // Simulate receipt of MtuExceeded by reducing PathMtuState to a value
     // lower than the local transport MTU.
@@ -1751,7 +1844,8 @@ async fn test_tun_outbound_path_mtu_generates_ptb() {
     {
         let entry = nodes[0].node.get_session_mut(&node1_addr).unwrap();
         let mmp = entry.mmp_mut().unwrap();
-        mmp.path_mtu.apply_notification(reduced_mtu, std::time::Instant::now());
+        mmp.path_mtu
+            .apply_notification(reduced_mtu, std::time::Instant::now());
         assert_eq!(mmp.path_mtu.current_mtu(), reduced_mtu);
     }
 
@@ -1764,14 +1858,24 @@ async fn test_tun_outbound_path_mtu_generates_ptb() {
     let local_ipv6_mtu = nodes[0].node.effective_ipv6_mtu() as usize;
     let oversized_payload = vec![0u8; reduced_ipv6_mtu - 39]; // 40-byte hdr + payload > reduced MTU
     let ipv6_packet = build_ipv6_packet(&src_fips, &dst_fips, &oversized_payload);
-    assert!(ipv6_packet.len() > reduced_ipv6_mtu, "packet must exceed path MTU");
-    assert!(ipv6_packet.len() <= local_ipv6_mtu, "packet must fit local MTU");
+    assert!(
+        ipv6_packet.len() > reduced_ipv6_mtu,
+        "packet must exceed path MTU"
+    );
+    assert!(
+        ipv6_packet.len() <= local_ipv6_mtu,
+        "packet must fit local MTU"
+    );
 
     nodes[0].node.handle_tun_outbound(ipv6_packet).await;
 
     // Verify ICMPv6 Packet Too Big was generated
     let ptb_messages: Vec<Vec<u8>> = std::iter::from_fn(|| tun_rx.try_recv().ok()).collect();
-    assert_eq!(ptb_messages.len(), 1, "Should generate exactly one ICMPv6 PTB");
+    assert_eq!(
+        ptb_messages.len(),
+        1,
+        "Should generate exactly one ICMPv6 PTB"
+    );
 
     let ptb = &ptb_messages[0];
     assert_eq!(ptb[0] >> 4, 6, "Should be IPv6");
@@ -1784,12 +1888,23 @@ async fn test_tun_outbound_path_mtu_generates_ptb() {
     // address, causing a PMTUD blackhole.
     let ptb_src = std::net::Ipv6Addr::from(<[u8; 16]>::try_from(&ptb[8..24]).unwrap());
     let ptb_dst = std::net::Ipv6Addr::from(<[u8; 16]>::try_from(&ptb[24..40]).unwrap());
-    assert_eq!(ptb_src, dst_fips.to_ipv6(), "PTB source must be remote peer (original dst), not local node");
-    assert_eq!(ptb_dst, src_fips.to_ipv6(), "PTB destination must be local node (original src)");
+    assert_eq!(
+        ptb_src,
+        dst_fips.to_ipv6(),
+        "PTB source must be remote peer (original dst), not local node"
+    );
+    assert_eq!(
+        ptb_dst,
+        src_fips.to_ipv6(),
+        "PTB destination must be local node (original src)"
+    );
 
     // Verify reported MTU (32-bit field at ICMPv6 header bytes 4-7)
     let reported_mtu = u32::from_be_bytes([ptb[44], ptb[45], ptb[46], ptb[47]]);
-    assert_eq!(reported_mtu, reduced_ipv6_mtu as u32, "Reported MTU should match path IPv6 MTU");
+    assert_eq!(
+        reported_mtu, reduced_ipv6_mtu as u32,
+        "Reported MTU should match path IPv6 MTU"
+    );
 
     // Verify a packet that fits within path MTU passes through (no PTB)
     let (tun_tx2, tun_rx2) = std::sync::mpsc::channel();
@@ -1802,7 +1917,11 @@ async fn test_tun_outbound_path_mtu_generates_ptb() {
 
     // No PTB should be generated for a fitting packet
     let ptb_messages2: Vec<Vec<u8>> = std::iter::from_fn(|| tun_rx2.try_recv().ok()).collect();
-    assert_eq!(ptb_messages2.len(), 0, "Should not generate PTB for fitting packet");
+    assert_eq!(
+        ptb_messages2.len(),
+        0,
+        "Should not generate PTB for fitting packet"
+    );
 
     cleanup_nodes(&mut nodes).await;
 }
@@ -1845,10 +1964,19 @@ async fn test_multihop_pmtud_heterogeneous_mtu() {
     nodes[0].node.register_identity(node2_addr, node2_pubkey);
 
     // Establish session A→C via B (triggers routing through tree)
-    nodes[0].node.initiate_session(node2_addr, node2_pubkey).await.unwrap();
+    nodes[0]
+        .node
+        .initiate_session(node2_addr, node2_pubkey)
+        .await
+        .unwrap();
     drain_to_quiescence(&mut nodes).await;
     assert!(
-        nodes[0].node.get_session(&node2_addr).unwrap().state().is_established(),
+        nodes[0]
+            .node
+            .get_session(&node2_addr)
+            .unwrap()
+            .state()
+            .is_established(),
         "Session A→C should be established"
     );
 
@@ -1858,7 +1986,11 @@ async fn test_multihop_pmtud_heterogeneous_mtu() {
     // With coords (~66 extra), the wire could exceed B's recv buffer.
     for _ in 0..5 {
         let small = build_ipv6_packet(&src_fips, &dst_fips, &[0u8; 10]);
-        nodes[0].node.send_ipv6_packet(&node2_addr, &small).await.unwrap();
+        nodes[0]
+            .node
+            .send_ipv6_packet(&node2_addr, &small)
+            .await
+            .unwrap();
     }
     drain_to_quiescence(&mut nodes).await;
 
@@ -1872,12 +2004,17 @@ async fn test_multihop_pmtud_heterogeneous_mtu() {
     assert!(
         ipv6_packet.len() <= local_effective_mtu,
         "packet ({}) must fit A's local MTU ({})",
-        ipv6_packet.len(), local_effective_mtu
+        ipv6_packet.len(),
+        local_effective_mtu
     );
 
     // Send the oversized packet — B should fail to forward and send
     // MtuExceeded signal back.
-    nodes[0].node.send_ipv6_packet(&node2_addr, &ipv6_packet).await.unwrap();
+    nodes[0]
+        .node
+        .send_ipv6_packet(&node2_addr, &ipv6_packet)
+        .await
+        .unwrap();
     drain_to_quiescence(&mut nodes).await;
 
     // Verify PathMtuState was updated on A
@@ -1902,7 +2039,8 @@ async fn test_multihop_pmtud_heterogeneous_mtu() {
 
     let ptb_messages: Vec<Vec<u8>> = std::iter::from_fn(|| tun_rx2.try_recv().ok()).collect();
     assert_eq!(
-        ptb_messages.len(), 1,
+        ptb_messages.len(),
+        1,
         "Should generate ICMPv6 PTB for oversized packet after PathMtuState update"
     );
 
@@ -1917,8 +2055,16 @@ async fn test_multihop_pmtud_heterogeneous_mtu() {
     // address, causing a PMTUD blackhole.
     let ptb_src = std::net::Ipv6Addr::from(<[u8; 16]>::try_from(&ptb[8..24]).unwrap());
     let ptb_dst = std::net::Ipv6Addr::from(<[u8; 16]>::try_from(&ptb[24..40]).unwrap());
-    assert_eq!(ptb_src, dst_fips.to_ipv6(), "PTB source must be remote peer (original dst), not local node");
-    assert_eq!(ptb_dst, src_fips.to_ipv6(), "PTB destination must be local node (original src)");
+    assert_eq!(
+        ptb_src,
+        dst_fips.to_ipv6(),
+        "PTB source must be remote peer (original dst), not local node"
+    );
+    assert_eq!(
+        ptb_dst,
+        src_fips.to_ipv6(),
+        "PTB destination must be local node (original src)"
+    );
 
     // Verify reported MTU is the path MTU (not local MTU)
     let reported_mtu = u32::from_be_bytes([ptb[44], ptb[45], ptb[46], ptb[47]]);
@@ -1941,7 +2087,8 @@ async fn test_multihop_pmtud_heterogeneous_mtu() {
 
     let ptb_messages3: Vec<Vec<u8>> = std::iter::from_fn(|| tun_rx3.try_recv().ok()).collect();
     assert_eq!(
-        ptb_messages3.len(), 0,
+        ptb_messages3.len(),
+        0,
         "Should not generate PTB for packet fitting within path MTU"
     );
 

src/node/tests/spanning_tree.rs

@@ -69,7 +69,9 @@ pub(super) async fn initiate_handshake(nodes: &mut [TestNode], i: usize, j: usiz
 
     let our_index = initiator.node.index_allocator.allocate().unwrap();
     let our_keypair = initiator.node.identity().keypair();
-    let noise_msg1 = conn.start_handshake(our_keypair, initiator.node.startup_epoch, 1000).unwrap();
+    let noise_msg1 = conn
+        .start_handshake(our_keypair, initiator.node.startup_epoch, 1000)
+        .unwrap();
     conn.set_our_index(our_index);
     conn.set_transport_id(transport_id);
     conn.set_source_addr(responder_addr.clone());
@@ -184,7 +186,12 @@ pub(super) fn print_tree_snapshot(label: &str, nodes: &[TestNode]) {
                 .count();
             eprintln!(
                 "  node[{}] root=node[{}] depth={} parent=node[{}] peers={} pending={}",
-                i, root_idx, ts.my_coords().depth(), parent_idx, tn.node.peer_count(), pending,
+                i,
+                root_idx,
+                ts.my_coords().depth(),
+                parent_idx,
+                tn.node.peer_count(),
+                pending,
             );
         }
     } else if correct_root_count < nodes.len() {
@@ -209,7 +216,9 @@ pub(super) fn print_tree_snapshot(label: &str, nodes: &[TestNode]) {
 ///
 /// Returns the number of packets processed.
 pub(super) async fn process_available_packets(nodes: &mut [TestNode]) -> usize {
-    use crate::node::wire::{CommonPrefix, FMP_VERSION, PHASE_ESTABLISHED, PHASE_MSG1, PHASE_MSG2, COMMON_PREFIX_SIZE};
+    use crate::node::wire::{
+        COMMON_PREFIX_SIZE, CommonPrefix, FMP_VERSION, PHASE_ESTABLISHED, PHASE_MSG1, PHASE_MSG2,
+    };
 
     let mut count = 0;
     for node in nodes.iter_mut() {
@@ -224,9 +233,7 @@ pub(super) async fn process_available_packets(nodes: &mut [TestNode]) -> usize {
                 match prefix.phase {
                     PHASE_MSG1 => node.node.handle_msg1(packet).await,
                     PHASE_MSG2 => node.node.handle_msg2(packet).await,
-                    PHASE_ESTABLISHED => {
-                        node.node.handle_encrypted_frame(packet).await
-                    }
+                    PHASE_ESTABLISHED => node.node.handle_encrypted_frame(packet).await,
                     _ => {}
                 }
                 count += 1;
@@ -319,7 +326,11 @@ pub(super) async fn drain_all_packets(nodes: &mut [TestNode], verbose: bool) ->
 ///
 /// First builds a random spanning tree to ensure connectivity,
 /// then adds extra edges up to the target count.
-pub(super) fn generate_random_edges(n: usize, target_edges: usize, seed: u64) -> Vec<(usize, usize)> {
+pub(super) fn generate_random_edges(
+    n: usize,
+    target_edges: usize,
+    seed: u64,
+) -> Vec<(usize, usize)> {
     use rand::rngs::StdRng;
     use rand::{RngExt, SeedableRng};
 
@@ -373,11 +384,7 @@ pub(super) fn verify_tree_convergence(nodes: &[TestNode]) {
     assert!(n > 0);
 
     // Find the expected root (smallest NodeAddr across all nodes)
-    let expected_root = nodes
-        .iter()
-        .map(|tn| *tn.node.node_addr())
-        .min()
-        .unwrap();
+    let expected_root = nodes.iter().map(|tn| *tn.node.node_addr()).min().unwrap();
 
     // All nodes should agree on the root
     for (i, tn) in nodes.iter().enumerate() {
@@ -627,12 +634,16 @@ pub(super) async fn run_tree_test_with_mtus(
         assert!(
             nodes[i].node.get_peer(&j_addr).is_some(),
             "Node {} should have peer {} (node {})",
-            i, j_addr, j
+            i,
+            j_addr,
+            j
         );
         assert!(
             nodes[j].node.get_peer(&i_addr).is_some(),
             "Node {} should have peer {} (node {})",
-            j, i_addr, i
+            j,
+            i_addr,
+            i
         );
     }
 

src/node/tests/tcp.rs

@@ -8,9 +8,9 @@
 use super::*;
 use crate::config::TcpConfig;
 use crate::transport::tcp::TcpTransport;
-use crate::transport::{packet_channel, TransportAddr, TransportHandle, TransportId};
+use crate::transport::{TransportAddr, TransportHandle, TransportId, packet_channel};
 use spanning_tree::{
-    cleanup_nodes, drain_all_packets, initiate_handshake, verify_tree_convergence, TestNode,
+    TestNode, cleanup_nodes, drain_all_packets, initiate_handshake, verify_tree_convergence,
 };
 use std::time::Duration;
 

src/node/tests/unit.rs

@@ -96,7 +96,10 @@ fn test_node_link_management() {
     assert_eq!(node.link_count(), 0);
 
     // Lookup should be gone
-    assert!(node.find_link_by_addr(TransportId::new(1), &TransportAddr::from_string("test")).is_none());
+    assert!(
+        node.find_link_by_addr(TransportId::new(1), &TransportAddr::from_string("test"))
+            .is_none()
+    );
 }
 
 #[test]
@@ -183,8 +186,14 @@ fn test_node_promote_connection() {
     let peer = node.get_peer(&node_addr).unwrap();
     assert_eq!(peer.authenticated_at(), 2000);
     assert!(peer.has_session(), "Promoted peer should have NoiseSession");
-    assert!(peer.our_index().is_some(), "Promoted peer should have our_index");
-    assert!(peer.their_index().is_some(), "Promoted peer should have their_index");
+    assert!(
+        peer.our_index().is_some(),
+        "Promoted peer should have our_index"
+    );
+    assert!(
+        peer.their_index().is_some(),
+        "Promoted peer should have their_index"
+    );
 
     // Verify peers_by_index is populated
     let our_index = peer.our_index().unwrap();
@@ -201,8 +210,7 @@ fn test_node_cross_connection_resolution() {
 
     // First connection and promotion (becomes active peer)
     let link_id1 = LinkId::new(1);
-    let (conn1, identity) =
-        make_completed_connection(&mut node, link_id1, transport_id, 1000);
+    let (conn1, identity) = make_completed_connection(&mut node, link_id1, transport_id, 1000);
     let node_addr = *identity.node_addr();
 
     node.add_connection(conn1).unwrap();
@@ -236,8 +244,7 @@ fn test_node_peer_limit() {
     // Add two peers via promotion
     for i in 0..2 {
         let link_id = LinkId::new(i as u64 + 1);
-        let (conn, identity) =
-            make_completed_connection(&mut node, link_id, transport_id, 1000);
+        let (conn, identity) = make_completed_connection(&mut node, link_id, transport_id, 1000);
         node.add_connection(conn).unwrap();
         node.promote_connection(link_id, identity, 2000).unwrap();
     }
@@ -246,8 +253,7 @@ fn test_node_peer_limit() {
 
     // Third should fail
     let link_id = LinkId::new(3);
-    let (conn, identity) =
-        make_completed_connection(&mut node, link_id, transport_id, 3000);
+    let (conn, identity) = make_completed_connection(&mut node, link_id, transport_id, 3000);
     node.add_connection(conn).unwrap();
 
     let result = node.promote_connection(link_id, identity, 4000);
@@ -296,23 +302,20 @@ fn test_node_sendable_peers() {
 
     // Add a healthy peer
     let link_id1 = LinkId::new(1);
-    let (conn1, identity1) =
-        make_completed_connection(&mut node, link_id1, transport_id, 1000);
+    let (conn1, identity1) = make_completed_connection(&mut node, link_id1, transport_id, 1000);
     let node_addr1 = *identity1.node_addr();
     node.add_connection(conn1).unwrap();
     node.promote_connection(link_id1, identity1, 2000).unwrap();
 
     // Add another peer and mark it stale (still sendable)
     let link_id2 = LinkId::new(2);
-    let (conn2, identity2) =
-        make_completed_connection(&mut node, link_id2, transport_id, 1000);
+    let (conn2, identity2) = make_completed_connection(&mut node, link_id2, transport_id, 1000);
     node.add_connection(conn2).unwrap();
     node.promote_connection(link_id2, identity2, 2000).unwrap();
 
     // Add a third peer and mark it disconnected (not sendable)
     let link_id3 = LinkId::new(3);
-    let (conn3, identity3) =
-        make_completed_connection(&mut node, link_id3, transport_id, 1000);
+    let (conn3, identity3) = make_completed_connection(&mut node, link_id3, transport_id, 1000);
     let node_addr3 = *identity3.node_addr();
     node.add_connection(conn3).unwrap();
     node.promote_connection(link_id3, identity3, 2000).unwrap();
@@ -345,14 +348,16 @@ fn test_node_pending_outbound_tracking() {
     let index = node.index_allocator.allocate().unwrap();
 
     // Track in pending_outbound
-    node.pending_outbound.insert((transport_id, index.as_u32()), link_id);
+    node.pending_outbound
+        .insert((transport_id, index.as_u32()), link_id);
 
     // Verify we can look it up
     let found = node.pending_outbound.get(&(transport_id, index.as_u32()));
     assert_eq!(found, Some(&link_id));
 
     // Clean up
-    node.pending_outbound.remove(&(transport_id, index.as_u32()));
+    node.pending_outbound
+        .remove(&(transport_id, index.as_u32()));
     let _ = node.index_allocator.free(index);
 
     assert_eq!(node.index_allocator.count(), 0);
@@ -369,7 +374,8 @@ fn test_node_peers_by_index_tracking() {
     let index = node.index_allocator.allocate().unwrap();
 
     // Track in peers_by_index
-    node.peers_by_index.insert((transport_id, index.as_u32()), node_addr);
+    node.peers_by_index
+        .insert((transport_id, index.as_u32()), node_addr);
 
     // Verify lookup
     let found = node.peers_by_index.get(&(transport_id, index.as_u32()));
@@ -450,7 +456,9 @@ fn test_promote_cleans_up_pending_outbound_to_same_peer() {
         PeerConnection::outbound(pending_link_id, peer_b_identity, pending_time_ms);
 
     let our_keypair = node.identity.keypair();
-    let _msg1 = pending_conn.start_handshake(our_keypair, node.startup_epoch, pending_time_ms).unwrap();
+    let _msg1 = pending_conn
+        .start_handshake(our_keypair, node.startup_epoch, pending_time_ms)
+        .unwrap();
 
     let pending_index = node.index_allocator.allocate().unwrap();
     pending_conn.set_our_index(pending_index);
@@ -483,11 +491,8 @@ fn test_promote_cleans_up_pending_outbound_to_same_peer() {
     let completing_link_id = LinkId::new(2);
     let completing_time_ms = 2000;
 
-    let mut completing_conn = PeerConnection::outbound(
-        completing_link_id,
-        peer_b_identity,
-        completing_time_ms,
-    );
+    let mut completing_conn =
+        PeerConnection::outbound(completing_link_id, peer_b_identity, completing_time_ms);
 
     let our_keypair = node.identity.keypair();
     let msg1 = completing_conn
@@ -573,7 +578,10 @@ fn test_schedule_retry_creates_entry() {
     assert_eq!(node.retry_pending.len(), 1);
     let state = node.retry_pending.get(&peer_node_addr).unwrap();
     assert_eq!(state.retry_count, 1);
-    assert!(state.reconnect, "Auto-connect peers always get reconnect=true");
+    assert!(
+        state.reconnect,
+        "Auto-connect peers always get reconnect=true"
+    );
     // Default base = 5s, 2^1 = 10s, but first retry is 2^0... let me check:
     // retry_count is set to 1, backoff_ms(5000) = 5000 * 2^1 = 10000
     assert_eq!(state.retry_after_ms, 1000 + 10_000);
@@ -597,7 +605,10 @@ fn test_schedule_retry_increments() {
 
     // First failure
     node.schedule_retry(peer_node_addr, 1000);
-    assert_eq!(node.retry_pending.get(&peer_node_addr).unwrap().retry_count, 1);
+    assert_eq!(
+        node.retry_pending.get(&peer_node_addr).unwrap().retry_count,
+        1
+    );
 
     // Second failure
     node.schedule_retry(peer_node_addr, 11_000);
@@ -637,7 +648,10 @@ fn test_schedule_retry_auto_connect_never_exhausts() {
         node.retry_pending.contains_key(&peer_node_addr),
         "Auto-connect peers should never exhaust retries"
     );
-    assert_eq!(node.retry_pending.get(&peer_node_addr).unwrap().retry_count, 3);
+    assert_eq!(
+        node.retry_pending.get(&peer_node_addr).unwrap().retry_count,
+        3
+    );
 }
 
 /// Test that schedule_retry does nothing when max_retries is 0.
@@ -725,7 +739,7 @@ fn test_schedule_reconnect_preserves_backoff() {
     let mut node = Node::new(config).unwrap();
 
     // Simulate two stale handshake timeouts incrementing the retry count.
-    node.schedule_retry(peer_node_addr, 1_000);  // count=1, delay=10s
+    node.schedule_retry(peer_node_addr, 1_000); // count=1, delay=10s
     node.schedule_retry(peer_node_addr, 11_000); // count=2, delay=20s
     {
         let state = node.retry_pending.get(&peer_node_addr).unwrap();
@@ -738,10 +752,7 @@ fn test_schedule_reconnect_preserves_backoff() {
     node.schedule_reconnect(peer_node_addr, 31_000);
 
     let state = node.retry_pending.get(&peer_node_addr).unwrap();
-    assert!(
-        state.reconnect,
-        "Entry should be marked as reconnect"
-    );
+    assert!(state.reconnect, "Entry should be marked as reconnect");
     assert_eq!(
         state.retry_count, 3,
         "schedule_reconnect should increment existing count (was 2), not reset to 0 (regression: issue #5)"
@@ -752,7 +763,8 @@ fn test_schedule_reconnect_preserves_backoff() {
     let max_ms = node.config.node.retry.max_backoff_secs * 1000;
     let expected_delay = state.backoff_ms(base_ms, max_ms);
     assert_eq!(
-        state.retry_after_ms, 31_000 + expected_delay,
+        state.retry_after_ms,
+        31_000 + expected_delay,
         "retry_after_ms should reflect count=3 backoff"
     );
 }
@@ -778,7 +790,10 @@ fn test_schedule_reconnect_fresh_state() {
 
     let state = node.retry_pending.get(&peer_node_addr).unwrap();
     assert!(state.reconnect, "Entry should be marked as reconnect");
-    assert_eq!(state.retry_count, 0, "Fresh reconnect should start at count=0");
+    assert_eq!(
+        state.retry_count, 0,
+        "Fresh reconnect should start at count=0"
+    );
     // Base delay: 5s * 2^0 = 5s
     let base_ms = node.config.node.retry.base_interval_secs * 1000;
     let max_ms = node.config.node.retry.max_backoff_secs * 1000;

src/node/tree.rs

@@ -5,8 +5,8 @@
 
 use std::collections::HashMap;
 
-use crate::protocol::TreeAnnounce;
 use crate::NodeAddr;
+use crate::protocol::TreeAnnounce;
 
 use super::{Node, NodeError};
 use tracing::{debug, info, trace, warn};
@@ -105,7 +105,9 @@ impl Node {
         let ready: Vec<NodeAddr> = self
             .peers
             .iter()
-            .filter(|(_, peer)| peer.has_pending_tree_announce() && peer.can_send_tree_announce(now_ms))
+            .filter(|(_, peer)| {
+                peer.has_pending_tree_announce() && peer.can_send_tree_announce(now_ms)
+            })
             .map(|(addr, _)| *addr)
             .collect();
 
@@ -185,10 +187,9 @@ impl Node {
         }
 
         // Update in TreeState
-        let updated = self.tree_state.update_peer(
-            announce.declaration.clone(),
-            announce.ancestry.clone(),
-        );
+        let updated = self
+            .tree_state
+            .update_peer(announce.declaration.clone(), announce.ancestry.clone());
 
         if !updated {
             self.stats_mut().tree.stale += 1;
@@ -214,7 +215,9 @@ impl Node {
         // Re-evaluate parent selection with current link costs.
         // Exclude peers without MMP RTT data — they are not yet eligible
         // as parent candidates (prevents oscillation from optimistic defaults).
-        let peer_costs: HashMap<NodeAddr, f64> = self.peers.iter()
+        let peer_costs: HashMap<NodeAddr, f64> = self
+            .peers
+            .iter()
             .filter(|(_, peer)| peer.has_srtt())
             .map(|(addr, peer)| (*addr, peer.link_cost()))
             .collect();
@@ -266,7 +269,9 @@ impl Node {
                     parent = %self.peer_display_name(from),
                     "Parent ancestry contains us — loop detected, dropping parent"
                 );
-                let peer_costs: HashMap<NodeAddr, f64> = self.peers.iter()
+                let peer_costs: HashMap<NodeAddr, f64> = self
+                    .peers
+                    .iter()
                     .filter(|(_, peer)| peer.has_srtt())
                     .map(|(addr, peer)| (*addr, peer.link_cost()))
                     .collect();
@@ -276,7 +281,7 @@ impl Node {
                         return;
                     }
                     self.coord_cache.clear();
-            self.reset_discovery_backoff();
+                    self.reset_discovery_backoff();
                     self.send_tree_announce_to_all().await;
                 }
                 return;
@@ -360,7 +365,9 @@ impl Node {
 
         self.last_parent_reeval = Some(now);
 
-        let peer_costs: HashMap<NodeAddr, f64> = self.peers.iter()
+        let peer_costs: HashMap<NodeAddr, f64> = self
+            .peers
+            .iter()
             .filter(|(_, peer)| peer.has_srtt())
             .map(|(addr, peer)| (*addr, peer.link_cost()))
             .collect();
@@ -411,14 +418,16 @@ impl Node {
     ///
     /// Returns `true` if our tree state changed (caller should announce).
     pub(super) fn handle_peer_removal_tree_cleanup(&mut self, node_addr: &NodeAddr) -> bool {
-        let was_parent = !self.tree_state.is_root()
-            && self.tree_state.my_declaration().parent_id() == node_addr;
+        let was_parent =
+            !self.tree_state.is_root() && self.tree_state.my_declaration().parent_id() == node_addr;
 
         self.tree_state.remove_peer(node_addr);
 
         if was_parent {
             self.stats_mut().tree.parent_losses += 1;
-            let peer_costs: HashMap<NodeAddr, f64> = self.peers.iter()
+            let peer_costs: HashMap<NodeAddr, f64> = self
+                .peers
+                .iter()
                 .filter(|(_, peer)| peer.has_srtt())
                 .map(|(addr, peer)| (*addr, peer.link_cost()))
                 .collect();

src/node/wire.rs

@@ -17,8 +17,8 @@
 //! | 0x1   | Noise IK msg1   | 114 bytes  | Handshake initiation           |
 //! | 0x2   | Noise IK msg2   | 69 bytes   | Handshake response             |
 
-use crate::utils::index::SessionIndex;
 use crate::noise::{HANDSHAKE_MSG1_SIZE, HANDSHAKE_MSG2_SIZE, TAG_SIZE};
+use crate::utils::index::SessionIndex;
 
 // ============================================================================
 // Constants
@@ -164,8 +164,7 @@ impl EncryptedHeader {
         let payload_len = u16::from_le_bytes([data[2], data[3]]);
         let receiver_idx = SessionIndex::from_le_bytes([data[4], data[5], data[6], data[7]]);
         let counter = u64::from_le_bytes([
-            data[8], data[9], data[10], data[11],
-            data[12], data[13], data[14], data[15],
+            data[8], data[9], data[10], data[11], data[12], data[13], data[14], data[15],
         ]);
 
         let mut header_bytes = [0u8; ESTABLISHED_HEADER_SIZE];
@@ -328,7 +327,11 @@ pub fn build_msg1(sender_idx: SessionIndex, noise_msg1: &[u8]) -> Vec<u8> {
 /// Build a wire-format msg2 packet.
 ///
 /// Format: `[0x02][0x00][payload_len:2 LE][sender_idx:4 LE][receiver_idx:4 LE][noise_msg2:57]`
-pub fn build_msg2(sender_idx: SessionIndex, receiver_idx: SessionIndex, noise_msg2: &[u8]) -> Vec<u8> {
+pub fn build_msg2(
+    sender_idx: SessionIndex,
+    receiver_idx: SessionIndex,
+    noise_msg2: &[u8],
+) -> Vec<u8> {
     debug_assert_eq!(noise_msg2.len(), HANDSHAKE_MSG2_SIZE);
 
     let payload_len = (4 + 4 + noise_msg2.len()) as u16; // sender + receiver + noise
@@ -542,8 +545,8 @@ mod tests {
 
     #[test]
     fn test_wire_sizes() {
-        assert_eq!(MSG1_WIRE_SIZE, 114);  // 4 + 4 + 106
-        assert_eq!(MSG2_WIRE_SIZE, 69);   // 4 + 4 + 4 + 57
+        assert_eq!(MSG1_WIRE_SIZE, 114); // 4 + 4 + 106
+        assert_eq!(MSG2_WIRE_SIZE, 69); // 4 + 4 + 4 + 57
         assert_eq!(ENCRYPTED_MIN_SIZE, 32); // 16 + 16
         assert_eq!(COMMON_PREFIX_SIZE, 4);
         assert_eq!(ESTABLISHED_HEADER_SIZE, 16);
@@ -585,22 +588,17 @@ mod tests {
 
     #[test]
     fn test_flags_byte() {
-        let header = build_established_header(
-            SessionIndex::new(1),
-            0,
-            FLAG_KEY_EPOCH | FLAG_SP,
-            100,
-        );
+        let header =
+            build_established_header(SessionIndex::new(1), 0, FLAG_KEY_EPOCH | FLAG_SP, 100);
         assert_eq!(header[1], 0x05); // bits 0 and 2 set
 
         let parsed = EncryptedHeader::parse(&[
-            header[0], header[1], header[2], header[3],
-            header[4], header[5], header[6], header[7],
-            header[8], header[9], header[10], header[11],
-            header[12], header[13], header[14], header[15],
-            // minimum: TAG_SIZE bytes of ciphertext
+            header[0], header[1], header[2], header[3], header[4], header[5], header[6], header[7],
+            header[8], header[9], header[10], header[11], header[12], header[13], header[14],
+            header[15], // minimum: TAG_SIZE bytes of ciphertext
             0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-        ]).unwrap();
+        ])
+        .unwrap();
         assert_eq!(parsed.flags & FLAG_KEY_EPOCH, FLAG_KEY_EPOCH);
         assert_eq!(parsed.flags & FLAG_CE, 0);
         assert_eq!(parsed.flags & FLAG_SP, FLAG_SP);

src/noise/handshake.rs

@@ -1,12 +1,12 @@
 use super::{
-    CipherState, HandshakeProgress, HandshakeRole, NoiseError, NoisePattern, NoiseSession,
-    EPOCH_ENCRYPTED_SIZE, EPOCH_SIZE, HANDSHAKE_MSG1_SIZE, HANDSHAKE_MSG2_SIZE,
-    PROTOCOL_NAME_IK, PROTOCOL_NAME_XK, PUBKEY_SIZE,
-    XK_HANDSHAKE_MSG1_SIZE, XK_HANDSHAKE_MSG2_SIZE, XK_HANDSHAKE_MSG3_SIZE,
+    CipherState, EPOCH_ENCRYPTED_SIZE, EPOCH_SIZE, HANDSHAKE_MSG1_SIZE, HANDSHAKE_MSG2_SIZE,
+    HandshakeProgress, HandshakeRole, NoiseError, NoisePattern, NoiseSession, PROTOCOL_NAME_IK,
+    PROTOCOL_NAME_XK, PUBKEY_SIZE, XK_HANDSHAKE_MSG1_SIZE, XK_HANDSHAKE_MSG2_SIZE,
+    XK_HANDSHAKE_MSG3_SIZE,
 };
 use hkdf::Hkdf;
 use rand::Rng;
-use secp256k1::{ecdh::shared_secret_point, Keypair, PublicKey, Secp256k1, SecretKey};
+use secp256k1::{Keypair, PublicKey, Secp256k1, SecretKey, ecdh::shared_secret_point};
 use sha2::{Digest, Sha256};
 use std::fmt;
 
@@ -343,8 +343,12 @@ impl HandshakeState {
             });
         }
 
-        let remote_static = self.remote_static.expect("initiator must have remote static");
-        let epoch = self.local_epoch.expect("local epoch must be set before write_message_1");
+        let remote_static = self
+            .remote_static
+            .expect("initiator must have remote static");
+        let epoch = self
+            .local_epoch
+            .expect("local epoch must be set before write_message_1");
 
         // Generate ephemeral keypair
         self.generate_ephemeral();
@@ -462,7 +466,9 @@ impl HandshakeState {
         }
 
         let re = self.remote_ephemeral.expect("should have remote ephemeral");
-        let epoch = self.local_epoch.expect("local epoch must be set before write_message_2");
+        let epoch = self
+            .local_epoch
+            .expect("local epoch must be set before write_message_2");
 
         // Generate ephemeral keypair
         self.generate_ephemeral();
@@ -572,7 +578,9 @@ impl HandshakeState {
             });
         }
 
-        let remote_static = self.remote_static.expect("initiator must have remote static");
+        let remote_static = self
+            .remote_static
+            .expect("initiator must have remote static");
 
         // Generate ephemeral keypair
         self.generate_ephemeral();
@@ -657,7 +665,9 @@ impl HandshakeState {
         }
 
         let re = self.remote_ephemeral.expect("should have remote ephemeral");
-        let epoch = self.local_epoch.expect("local epoch must be set before write_xk_message_2");
+        let epoch = self
+            .local_epoch
+            .expect("local epoch must be set before write_xk_message_2");
 
         // Generate ephemeral keypair
         self.generate_ephemeral();
@@ -755,8 +765,12 @@ impl HandshakeState {
             });
         }
 
-        let re = self.remote_ephemeral.expect("should have remote ephemeral after msg2");
-        let epoch = self.local_epoch.expect("local epoch must be set before write_xk_message_3");
+        let re = self
+            .remote_ephemeral
+            .expect("should have remote ephemeral after msg2");
+        let epoch = self
+            .local_epoch
+            .expect("local epoch must be set before write_xk_message_3");
 
         let mut message = Vec::with_capacity(XK_HANDSHAKE_MSG3_SIZE);
 
@@ -813,7 +827,10 @@ impl HandshakeState {
 
         // -> se: DH(e, rs), mix into key
         // (responder uses their ephemeral with initiator's now-known static)
-        let ephemeral = self.ephemeral_keypair.as_ref().expect("should have ephemeral after msg2");
+        let ephemeral = self
+            .ephemeral_keypair
+            .as_ref()
+            .expect("should have ephemeral after msg2");
         let se = self.ecdh(&ephemeral.secret_key(), &rs);
         self.symmetric.mix_key(&se);
 

src/noise/mod.rs

@@ -40,8 +40,8 @@ mod replay;
 mod session;
 
 use chacha20poly1305::{
-    aead::{Aead, KeyInit, Payload},
     ChaCha20Poly1305, Nonce,
+    aead::{Aead, KeyInit, Payload},
 };
 use std::fmt;
 use thiserror::Error;
@@ -327,7 +327,13 @@ impl CipherState {
 
         let nonce = self.next_nonce()?;
         let ciphertext = cipher
-            .encrypt(&nonce, Payload { msg: plaintext, aad })
+            .encrypt(
+                &nonce,
+                Payload {
+                    msg: plaintext,
+                    aad,
+                },
+            )
             .map_err(|_| NoiseError::EncryptionFailed)?;
 
         Ok(ciphertext)
@@ -360,7 +366,13 @@ impl CipherState {
 
         let nonce = Self::counter_to_nonce(counter);
         let plaintext = cipher
-            .decrypt(&nonce, Payload { msg: ciphertext, aad })
+            .decrypt(
+                &nonce,
+                Payload {
+                    msg: ciphertext,
+                    aad,
+                },
+            )
             .map_err(|_| NoiseError::DecryptionFailed)?;
 
         Ok(plaintext)

src/noise/session.rs

@@ -133,7 +133,9 @@ impl NoiseSession {
         }
 
         // Attempt decryption with AAD (expensive)
-        let plaintext = self.recv_cipher.decrypt_with_counter_and_aad(ciphertext, counter, aad)?;
+        let plaintext = self
+            .recv_cipher
+            .decrypt_with_counter_and_aad(ciphertext, counter, aad)?;
 
         // Only accept into window after successful decryption
         self.replay_window.accept(counter);

src/noise/tests.rs

@@ -129,9 +129,11 @@ fn test_wrong_role_errors() {
     initiator.set_local_epoch(generate_epoch());
 
     // Initiator can't read message 1
-    assert!(initiator
-        .read_message_1(&[0u8; HANDSHAKE_MSG1_SIZE])
-        .is_err());
+    assert!(
+        initiator
+            .read_message_1(&[0u8; HANDSHAKE_MSG1_SIZE])
+            .is_err()
+    );
 
     // Initiator can't write message 2 before message 1
     assert!(initiator.write_message_2().is_err());
@@ -337,7 +339,11 @@ fn test_replay_window_sequential() {
 
     // All should be marked as seen
     for i in 0..1000 {
-        assert!(!window.check(i), "Counter {} should be rejected as replay", i);
+        assert!(
+            !window.check(i),
+            "Counter {} should be rejected as replay",
+            i
+        );
     }
 
     assert_eq!(window.highest(), 999);
@@ -403,18 +409,20 @@ fn test_handshake_with_odd_parity_responder() {
 
     // Node B (responder) - odd parity key
     let sk_b = secp256k1::SecretKey::from_slice(
-        &hex::decode("b102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1fb0")
-            .unwrap(),
+        &hex::decode("b102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1fb0").unwrap(),
     )
     .unwrap();
     let kp_b = secp256k1::Keypair::from_secret_key(&secp, &sk_b);
     let (xonly_b, parity_b) = kp_b.public_key().x_only_public_key();
-    assert_eq!(parity_b, Parity::Odd, "Test requires odd-parity responder key");
+    assert_eq!(
+        parity_b,
+        Parity::Odd,
+        "Test requires odd-parity responder key"
+    );
 
     // Node A (initiator) - even parity key
     let sk_a = secp256k1::SecretKey::from_slice(
-        &hex::decode("0102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f20")
-            .unwrap(),
+        &hex::decode("0102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f20").unwrap(),
     )
     .unwrap();
     let kp_a = secp256k1::Keypair::from_secret_key(&secp, &sk_a);
@@ -423,7 +431,8 @@ fn test_handshake_with_odd_parity_responder() {
     // (x-only -> assumed even parity)
     let assumed_even_b = xonly_b.public_key(Parity::Even);
     assert_ne!(
-        assumed_even_b, kp_b.public_key(),
+        assumed_even_b,
+        kp_b.public_key(),
         "Even assumption should differ from actual odd key"
     );
 
@@ -554,7 +563,8 @@ fn test_xk_identity_timing() {
     let initiator_keypair = generate_keypair();
     let responder_keypair = generate_keypair();
 
-    let mut initiator = HandshakeState::new_xk_initiator(initiator_keypair, responder_keypair.public_key());
+    let mut initiator =
+        HandshakeState::new_xk_initiator(initiator_keypair, responder_keypair.public_key());
     initiator.set_local_epoch(generate_epoch());
     let mut responder = HandshakeState::new_xk_responder(responder_keypair);
     responder.set_local_epoch(generate_epoch());
@@ -565,18 +575,30 @@ fn test_xk_identity_timing() {
     // After msg1
     let msg1 = initiator.write_xk_message_1().unwrap();
     responder.read_xk_message_1(&msg1).unwrap();
-    assert!(responder.remote_static().is_none(), "XK: responder should NOT know identity after msg1");
+    assert!(
+        responder.remote_static().is_none(),
+        "XK: responder should NOT know identity after msg1"
+    );
 
     // After msg2
     let msg2 = responder.write_xk_message_2().unwrap();
     initiator.read_xk_message_2(&msg2).unwrap();
-    assert!(responder.remote_static().is_none(), "XK: responder should NOT know identity after msg2");
+    assert!(
+        responder.remote_static().is_none(),
+        "XK: responder should NOT know identity after msg2"
+    );
 
     // After msg3
     let msg3 = initiator.write_xk_message_3().unwrap();
     responder.read_xk_message_3(&msg3).unwrap();
-    assert!(responder.remote_static().is_some(), "XK: responder should know identity after msg3");
-    assert_eq!(responder.remote_static().unwrap(), &initiator_keypair.public_key());
+    assert!(
+        responder.remote_static().is_some(),
+        "XK: responder should know identity after msg3"
+    );
+    assert_eq!(
+        responder.remote_static().unwrap(),
+        &initiator_keypair.public_key()
+    );
 }
 
 #[test]
@@ -587,7 +609,11 @@ fn test_xk_wrong_state_errors() {
     // Initiator can't read XK msg1
     let mut initiator = HandshakeState::new_xk_initiator(keypair1, keypair2.public_key());
     initiator.set_local_epoch(generate_epoch());
-    assert!(initiator.read_xk_message_1(&[0u8; XK_HANDSHAKE_MSG1_SIZE]).is_err());
+    assert!(
+        initiator
+            .read_xk_message_1(&[0u8; XK_HANDSHAKE_MSG1_SIZE])
+            .is_err()
+    );
 
     // Initiator can't write msg2
     assert!(initiator.write_xk_message_2().is_err());
@@ -601,7 +627,11 @@ fn test_xk_wrong_state_errors() {
     assert!(responder.write_xk_message_1().is_err());
 
     // Responder can't read msg3 before msg2
-    assert!(responder.read_xk_message_3(&[0u8; XK_HANDSHAKE_MSG3_SIZE]).is_err());
+    assert!(
+        responder
+            .read_xk_message_3(&[0u8; XK_HANDSHAKE_MSG3_SIZE])
+            .is_err()
+    );
 }
 
 #[test]
@@ -636,7 +666,10 @@ fn test_xk_handshake_hash_differs_from_ik() {
     xk_resp.read_xk_message_3(&msg3).unwrap();
     let xk_hash = xk_init.handshake_hash();
 
-    assert_ne!(ik_hash, xk_hash, "IK and XK should produce different handshake hashes");
+    assert_ne!(
+        ik_hash, xk_hash,
+        "IK and XK should produce different handshake hashes"
+    );
 }
 
 #[test]
@@ -677,18 +710,20 @@ fn test_xk_with_odd_parity_responder() {
 
     // Node B (responder) - odd parity key
     let sk_b = secp256k1::SecretKey::from_slice(
-        &hex::decode("b102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1fb0")
-            .unwrap(),
+        &hex::decode("b102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1fb0").unwrap(),
     )
     .unwrap();
     let kp_b = secp256k1::Keypair::from_secret_key(&secp, &sk_b);
     let (xonly_b, parity_b) = kp_b.public_key().x_only_public_key();
-    assert_eq!(parity_b, Parity::Odd, "Test requires odd-parity responder key");
+    assert_eq!(
+        parity_b,
+        Parity::Odd,
+        "Test requires odd-parity responder key"
+    );
 
     // Node A (initiator)
     let sk_a = secp256k1::SecretKey::from_slice(
-        &hex::decode("0102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f20")
-            .unwrap(),
+        &hex::decode("0102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f20").unwrap(),
     )
     .unwrap();
     let kp_a = secp256k1::Keypair::from_secret_key(&secp, &sk_a);
@@ -716,7 +751,9 @@ fn test_xk_with_odd_parity_responder() {
 
     let counter = sender.current_send_counter();
     let ciphertext = sender.encrypt(b"xk parity test").unwrap();
-    let plaintext = receiver.decrypt_with_replay_check(&ciphertext, counter).unwrap();
+    let plaintext = receiver
+        .decrypt_with_replay_check(&ciphertext, counter)
+        .unwrap();
     assert_eq!(plaintext, b"xk parity test");
 }
 
@@ -727,7 +764,11 @@ fn test_xk_invalid_msg1_size() {
     responder.set_local_epoch(generate_epoch());
 
     // Wrong size (IK msg1 size instead of XK)
-    assert!(responder.read_xk_message_1(&[0u8; HANDSHAKE_MSG1_SIZE]).is_err());
+    assert!(
+        responder
+            .read_xk_message_1(&[0u8; HANDSHAKE_MSG1_SIZE])
+            .is_err()
+    );
     // Too short
     assert!(responder.read_xk_message_1(&[0u8; 10]).is_err());
 }
@@ -748,5 +789,9 @@ fn test_xk_invalid_msg3_size() {
 
     // Responder is now in Message2Done, try wrong-size msg3
     assert!(responder.read_xk_message_3(&[0u8; 10]).is_err());
-    assert!(responder.read_xk_message_3(&[0u8; XK_HANDSHAKE_MSG3_SIZE + 1]).is_err());
+    assert!(
+        responder
+            .read_xk_message_3(&[0u8; XK_HANDSHAKE_MSG3_SIZE + 1])
+            .is_err()
+    );
 }

src/peer/active.rs

@@ -5,10 +5,10 @@
 
 use crate::bloom::BloomFilter;
 use crate::mmp::{MmpConfig, MmpPeerState};
-use crate::utils::index::SessionIndex;
 use crate::noise::{HandshakeState as NoiseHandshakeState, NoiseError, NoiseSession};
 use crate::transport::{LinkId, LinkStats, TransportAddr, TransportId};
 use crate::tree::{ParentDeclaration, TreeCoordinate};
+use crate::utils::index::SessionIndex;
 use crate::{FipsAddress, NodeAddr, PeerIdentity};
 use secp256k1::XOnlyPublicKey;
 use std::fmt;
@@ -32,7 +32,10 @@ pub enum ConnectivityState {
 impl ConnectivityState {
     /// Check if the peer is usable for sending traffic.
     pub fn can_send(&self) -> bool {
-        matches!(self, ConnectivityState::Connected | ConnectivityState::Stale)
+        matches!(
+            self,
+            ConnectivityState::Connected | ConnectivityState::Stale
+        )
     }
 
     /// Check if this is a terminal state requiring cleanup.
@@ -744,12 +747,7 @@ impl ActivePeer {
     // === Filter Updates ===
 
     /// Update peer's inbound filter.
-    pub fn update_filter(
-        &mut self,
-        filter: BloomFilter,
-        sequence: u64,
-        current_time_ms: u64,
-    ) {
+    pub fn update_filter(&mut self, filter: BloomFilter, sequence: u64, current_time_ms: u64) {
         self.inbound_filter = Some(filter);
         self.filter_sequence = sequence;
         self.filter_received_at = current_time_ms;
@@ -964,12 +962,11 @@ impl ActivePeer {
         self.rekey_msg1_next_resend = 0;
         self.rekey_in_progress = false;
         // Return whichever index needs freeing
-        self.rekey_our_index.take()
-            .or_else(|| {
-                self.pending_new_session = None;
-                self.pending_their_index = None;
-                self.pending_our_index.take()
-            })
+        self.rekey_our_index.take().or_else(|| {
+            self.pending_new_session = None;
+            self.pending_their_index = None;
+            self.pending_our_index.take()
+        })
     }
 
     // === Rekey Handshake State (Initiator) ===
@@ -999,11 +996,9 @@ impl ActivePeer {
     /// Takes the stored handshake state, reads msg2, and returns the
     /// completed NoiseSession. Clears the handshake-related fields but
     /// leaves rekey_our_index for set_pending_session to use.
-    pub fn complete_rekey_msg2(
-        &mut self,
-        msg2_bytes: &[u8],
-    ) -> Result<NoiseSession, NoiseError> {
-        let mut hs = self.rekey_handshake
+    pub fn complete_rekey_msg2(&mut self, msg2_bytes: &[u8]) -> Result<NoiseSession, NoiseError> {
+        let mut hs = self
+            .rekey_handshake
             .take()
             .ok_or_else(|| NoiseError::WrongState {
                 expected: "rekey handshake in progress".to_string(),
@@ -1022,9 +1017,7 @@ impl ActivePeer {
 
     /// Check if msg1 needs resending.
     pub fn needs_msg1_resend(&self, now_ms: u64) -> bool {
-        self.rekey_in_progress
-            && self.rekey_msg1.is_some()
-            && now_ms >= self.rekey_msg1_next_resend
+        self.rekey_in_progress && self.rekey_msg1.is_some() && now_ms >= self.rekey_msg1_next_resend
     }
 
     /// Get msg1 bytes for resend (without consuming).

src/peer/connection.rs

@@ -4,10 +4,10 @@
 //! PeerConnection tracks the Noise IK handshake state and transitions to
 //! ActivePeer upon successful authentication.
 
-use crate::utils::index::SessionIndex;
+use crate::PeerIdentity;
 use crate::noise::{self, NoiseError, NoiseSession};
 use crate::transport::{LinkDirection, LinkId, LinkStats, TransportAddr, TransportId};
-use crate::PeerIdentity;
+use crate::utils::index::SessionIndex;
 use secp256k1::Keypair;
 use std::fmt;
 
@@ -558,7 +558,6 @@ impl PeerConnection {
     pub fn is_timed_out(&self, current_time_ms: u64, timeout_ms: u64) -> bool {
         self.idle_time(current_time_ms) > timeout_ms
     }
-
 }
 
 impl fmt::Debug for PeerConnection {
@@ -651,12 +650,13 @@ mod tests {
         let responder_peer_id = PeerIdentity::from_pubkey_full(responder_identity.pubkey_full());
 
         // Create connections
-        let mut initiator_conn =
-            PeerConnection::outbound(LinkId::new(1), responder_peer_id, 1000);
+        let mut initiator_conn = PeerConnection::outbound(LinkId::new(1), responder_peer_id, 1000);
         let mut responder_conn = PeerConnection::inbound(LinkId::new(2), 1000);
 
         // Initiator starts handshake
-        let msg1 = initiator_conn.start_handshake(initiator_keypair, initiator_epoch, 1100).unwrap();
+        let msg1 = initiator_conn
+            .start_handshake(initiator_keypair, initiator_epoch, 1100)
+            .unwrap();
         assert_eq!(initiator_conn.handshake_state(), HandshakeState::SentMsg1);
 
         // Responder processes msg1 and sends msg2
@@ -723,12 +723,18 @@ mod tests {
 
         // Outbound can't receive_handshake_init
         let mut outbound = PeerConnection::outbound(LinkId::new(1), identity, 1000);
-        assert!(outbound
-            .receive_handshake_init(keypair, make_epoch(), &[0u8; 106], 1100)
-            .is_err());
+        assert!(
+            outbound
+                .receive_handshake_init(keypair, make_epoch(), &[0u8; 106], 1100)
+                .is_err()
+        );
 
         // Inbound can't start_handshake
         let mut inbound = PeerConnection::inbound(LinkId::new(2), 1000);
-        assert!(inbound.start_handshake(keypair, make_epoch(), 1100).is_err());
+        assert!(
+            inbound
+                .start_handshake(keypair, make_epoch(), 1100)
+                .is_err()
+        );
     }
 }

src/peer/mod.rs

@@ -13,8 +13,8 @@ mod connection;
 pub use active::{ActivePeer, ConnectivityState};
 pub use connection::{HandshakeState, PeerConnection};
 
-use crate::transport::LinkId;
 use crate::NodeAddr;
+use crate::transport::LinkId;
 use std::fmt;
 use thiserror::Error;
 
@@ -44,7 +44,10 @@ pub enum PeerError {
     HandshakeTimeout,
 
     #[error("identity mismatch: expected {expected:?}, got {actual:?}")]
-    IdentityMismatch { expected: NodeAddr, actual: NodeAddr },
+    IdentityMismatch {
+        expected: NodeAddr,
+        actual: NodeAddr,
+    },
 
     #[error("peer disconnected")]
     Disconnected,
@@ -240,10 +243,20 @@ impl fmt::Display for PeerSlot {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         match self {
             PeerSlot::Connecting(conn) => {
-                write!(f, "connecting(link={}, state={})", conn.link_id(), conn.handshake_state())
+                write!(
+                    f,
+                    "connecting(link={}, state={})",
+                    conn.link_id(),
+                    conn.handshake_state()
+                )
             }
             PeerSlot::Active(peer) => {
-                write!(f, "active(node={:?}, link={})", peer.node_addr(), peer.link_id())
+                write!(
+                    f,
+                    "active(node={:?}, link={})",
+                    peer.node_addr(),
+                    peer.link_id()
+                )
             }
         }
     }

src/protocol/discovery.rs

@@ -1,9 +1,9 @@
 //! Discovery messages: LookupRequest and LookupResponse.
 
+use crate::NodeAddr;
 use crate::protocol::error::ProtocolError;
 use crate::protocol::session::{decode_coords, encode_coords};
 use crate::tree::TreeCoordinate;
-use crate::NodeAddr;
 use secp256k1::schnorr::Signature;
 
 /// Request to discover a node's coordinates.
@@ -192,7 +192,11 @@ impl LookupResponse {
     /// Get the bytes that should be signed as proof.
     ///
     /// Format: request_id (8) || target (16) || coords_encoding (2 + 16×n)
-    pub fn proof_bytes(request_id: u64, target: &NodeAddr, target_coords: &TreeCoordinate) -> Vec<u8> {
+    pub fn proof_bytes(
+        request_id: u64,
+        target: &NodeAddr,
+        target_coords: &TreeCoordinate,
+    ) -> Vec<u8> {
         let coord_size = 2 + target_coords.entries().len() * 16;
         let mut bytes = Vec::with_capacity(24 + coord_size);
         bytes.extend_from_slice(&request_id.to_le_bytes());

src/protocol/filter.rs

@@ -42,11 +42,7 @@ impl FilterAnnounce {
     }
 
     /// Create with explicit size_class (for testing or future protocol versions).
-    pub fn with_size_class(
-        filter: BloomFilter,
-        sequence: u64,
-        size_class: u8,
-    ) -> Self {
+    pub fn with_size_class(filter: BloomFilter, sequence: u64, size_class: u8) -> Self {
         Self {
             hash_count: filter.hash_count(),
             size_class,
@@ -164,10 +160,8 @@ impl FilterAnnounce {
         }
 
         // Construct BloomFilter from bytes
-        let filter =
-            crate::bloom::BloomFilter::from_slice(&payload[pos..], hash_count).map_err(|e| {
-                ProtocolError::Malformed(format!("invalid bloom filter: {e}"))
-            })?;
+        let filter = crate::bloom::BloomFilter::from_slice(&payload[pos..], hash_count)
+            .map_err(|e| ProtocolError::Malformed(format!("invalid bloom filter: {e}")))?;
 
         let announce = Self {
             filter,
@@ -253,7 +247,12 @@ mod tests {
 
         let result = FilterAnnounce::decode(&encoded[1..]);
         assert!(result.is_err());
-        assert!(result.unwrap_err().to_string().contains("invalid size_class"));
+        assert!(
+            result
+                .unwrap_err()
+                .to_string()
+                .contains("invalid size_class")
+        );
     }
 
     #[test]
@@ -265,10 +264,12 @@ mod tests {
 
         let result = FilterAnnounce::decode(&encoded[1..]);
         assert!(result.is_err());
-        assert!(result
-            .unwrap_err()
-            .to_string()
-            .contains("unsupported size_class"));
+        assert!(
+            result
+                .unwrap_err()
+                .to_string()
+                .contains("unsupported size_class")
+        );
     }
 
     #[test]

src/protocol/link.rs

@@ -533,8 +533,7 @@ mod tests {
         let src = make_node_addr(0xAA);
         let dest = make_node_addr(0xBB);
         let payload = vec![0x10, 0x00, 0x05, 0x00, 1, 2, 3, 4, 5]; // session payload
-        let dg = SessionDatagram::new(src, dest, payload.clone())
-            .with_ttl(32);
+        let dg = SessionDatagram::new(src, dest, payload.clone()).with_ttl(32);
 
         let encoded = dg.encode();
         assert_eq!(encoded[0], 0x00); // msg_type (SessionDatagram)

src/protocol/mod.rs

@@ -28,21 +28,21 @@ mod session;
 mod tree;
 
 // Re-export all public types at protocol:: level
-pub use error::ProtocolError;
-pub use link::{
-    Disconnect, DisconnectReason, HandshakeMessageType, LinkMessageType, SessionDatagram,
-    SESSION_DATAGRAM_HEADER_SIZE,
-};
-pub use tree::TreeAnnounce;
-pub use filter::FilterAnnounce;
 pub use discovery::{LookupRequest, LookupResponse};
+pub use error::ProtocolError;
+pub use filter::FilterAnnounce;
+pub use link::{
+    Disconnect, DisconnectReason, HandshakeMessageType, LinkMessageType,
+    SESSION_DATAGRAM_HEADER_SIZE, SessionDatagram,
+};
 pub use session::{
-    CoordsRequired, FspFlags, FspInnerFlags, MtuExceeded, PathBroken, PathMtuNotification,
-    SessionAck, SessionFlags, SessionMessageType, SessionMsg3, SessionReceiverReport,
-    SessionSenderReport, SessionSetup, COORDS_REQUIRED_SIZE, MTU_EXCEEDED_SIZE,
-    PATH_MTU_NOTIFICATION_SIZE, SESSION_RECEIVER_REPORT_SIZE, SESSION_SENDER_REPORT_SIZE,
+    COORDS_REQUIRED_SIZE, CoordsRequired, FspFlags, FspInnerFlags, MTU_EXCEEDED_SIZE, MtuExceeded,
+    PATH_MTU_NOTIFICATION_SIZE, PathBroken, PathMtuNotification, SESSION_RECEIVER_REPORT_SIZE,
+    SESSION_SENDER_REPORT_SIZE, SessionAck, SessionFlags, SessionMessageType, SessionMsg3,
+    SessionReceiverReport, SessionSenderReport, SessionSetup,
 };
 pub(crate) use session::{coords_wire_size, decode_optional_coords, encode_coords};
+pub use tree::TreeAnnounce;
 
 /// Protocol version for message compatibility.
 pub const PROTOCOL_VERSION: u8 = 1;

src/protocol/session.rs

@@ -1,8 +1,8 @@
 //! Session-layer message types: setup, ack, data, and error messages.
 
 use super::ProtocolError;
-use crate::tree::TreeCoordinate;
 use crate::NodeAddr;
+use crate::tree::TreeCoordinate;
 use std::fmt;
 
 // ============================================================================
@@ -141,15 +141,17 @@ pub(crate) fn decode_coords(data: &[u8]) -> Result<(TreeCoordinate, usize), Prot
         bytes.copy_from_slice(&data[offset..offset + 16]);
         addrs.push(NodeAddr::from_bytes(bytes));
     }
-    let coord = TreeCoordinate::from_addrs(addrs)
-        .map_err(|e| ProtocolError::Malformed(e.to_string()))?;
+    let coord =
+        TreeCoordinate::from_addrs(addrs).map_err(|e| ProtocolError::Malformed(e.to_string()))?;
     Ok((coord, needed))
 }
 
 /// Decode an optional coordinate field (count may be 0).
 ///
 /// Returns None if count is 0, Some(coord) otherwise, plus bytes consumed.
-pub(crate) fn decode_optional_coords(data: &[u8]) -> Result<(Option<TreeCoordinate>, usize), ProtocolError> {
+pub(crate) fn decode_optional_coords(
+    data: &[u8],
+) -> Result<(Option<TreeCoordinate>, usize), ProtocolError> {
     if data.len() < 2 {
         return Err(ProtocolError::MessageTooShort {
             expected: 2,
@@ -174,8 +176,8 @@ pub(crate) fn decode_optional_coords(data: &[u8]) -> Result<(Option<TreeCoordina
         bytes.copy_from_slice(&data[offset..offset + 16]);
         addrs.push(NodeAddr::from_bytes(bytes));
     }
-    let coord = TreeCoordinate::from_addrs(addrs)
-        .map_err(|e| ProtocolError::Malformed(e.to_string()))?;
+    let coord =
+        TreeCoordinate::from_addrs(addrs).map_err(|e| ProtocolError::Malformed(e.to_string()))?;
     Ok((Some(coord), needed))
 }
 
@@ -909,7 +911,10 @@ pub const COORDS_REQUIRED_SIZE: usize = 34;
 impl CoordsRequired {
     /// Create a new CoordsRequired error.
     pub fn new(dest_addr: NodeAddr, reporter: NodeAddr) -> Self {
-        Self { dest_addr, reporter }
+        Self {
+            dest_addr,
+            reporter,
+        }
     }
 
     /// Encode as wire format (4-byte FSP prefix + msg_type + body).
@@ -1081,7 +1086,11 @@ pub const MTU_EXCEEDED_SIZE: usize = 36;
 impl MtuExceeded {
     /// Create a new MtuExceeded error.
     pub fn new(dest_addr: NodeAddr, reporter: NodeAddr, mtu: u16) -> Self {
-        Self { dest_addr, reporter, mtu }
+        Self {
+            dest_addr,
+            reporter,
+            mtu,
+        }
     }
 
     /// Encode as wire format (4-byte FSP prefix + msg_type + body).
@@ -1359,8 +1368,7 @@ mod tests {
         let addrs: Vec<u8> = (0..11).collect();
         let src = make_coords(&addrs);
         let dest = make_coords(&[20, 21, 22, 23, 24]);
-        let setup = SessionSetup::new(src.clone(), dest.clone())
-            .with_handshake(vec![0x55; 82]);
+        let setup = SessionSetup::new(src.clone(), dest.clone()).with_handshake(vec![0x55; 82]);
 
         let encoded = setup.encode();
         let decoded = SessionSetup::decode(&encoded[4..]).unwrap();
@@ -1459,9 +1467,18 @@ mod tests {
 
     #[test]
     fn test_session_message_type_display() {
-        assert_eq!(format!("{}", SessionMessageType::SenderReport), "SenderReport");
-        assert_eq!(format!("{}", SessionMessageType::ReceiverReport), "ReceiverReport");
-        assert_eq!(format!("{}", SessionMessageType::PathMtuNotification), "PathMtuNotification");
+        assert_eq!(
+            format!("{}", SessionMessageType::SenderReport),
+            "SenderReport"
+        );
+        assert_eq!(
+            format!("{}", SessionMessageType::ReceiverReport),
+            "ReceiverReport"
+        );
+        assert_eq!(
+            format!("{}", SessionMessageType::PathMtuNotification),
+            "PathMtuNotification"
+        );
     }
 
     // ===== SessionSenderReport Tests =====
@@ -1639,7 +1656,10 @@ mod tests {
 
     #[test]
     fn test_mtu_exceeded_display() {
-        assert_eq!(format!("{}", SessionMessageType::MtuExceeded), "MtuExceeded");
+        assert_eq!(
+            format!("{}", SessionMessageType::MtuExceeded),
+            "MtuExceeded"
+        );
     }
 
     // ===== SessionMsg3 Tests =====

src/protocol/tree.rs

@@ -2,8 +2,8 @@
 
 use super::error::ProtocolError;
 use super::link::LinkMessageType;
-use crate::tree::{CoordEntry, ParentDeclaration, TreeCoordinate};
 use crate::NodeAddr;
+use crate::tree::{CoordEntry, ParentDeclaration, TreeCoordinate};
 use secp256k1::schnorr::Signature;
 
 /// Spanning tree announcement carrying parent declaration and ancestry.
@@ -166,8 +166,8 @@ impl TreeAnnounce {
         let sig_bytes: [u8; 64] = payload[pos..pos + 64]
             .try_into()
             .map_err(|_| ProtocolError::Malformed("bad signature".into()))?;
-        let signature = Signature::from_slice(&sig_bytes)
-            .map_err(|_| ProtocolError::InvalidSignature)?;
+        let signature =
+            Signature::from_slice(&sig_bytes).map_err(|_| ProtocolError::InvalidSignature)?;
 
         // The first entry's node_addr is the declaring node
         if entries.is_empty() {
@@ -324,7 +324,10 @@ mod tests {
         encoded[1] = 0xFF;
 
         let result = TreeAnnounce::decode(&encoded[1..]);
-        assert!(matches!(result, Err(ProtocolError::UnsupportedVersion(0xFF))));
+        assert!(matches!(
+            result,
+            Err(ProtocolError::UnsupportedVersion(0xFF))
+        ));
     }
 
     #[test]
@@ -365,10 +368,7 @@ mod tests {
         encoded[35] = 0;
 
         let result = TreeAnnounce::decode(&encoded[1..]);
-        assert!(matches!(
-            result,
-            Err(ProtocolError::MessageTooShort { .. })
-        ));
+        assert!(matches!(result, Err(ProtocolError::MessageTooShort { .. })));
     }
 
     #[test]

src/transport/ethernet/mod.rs

@@ -14,10 +14,8 @@ use super::{
     TransportId, TransportState, TransportType,
 };
 use crate::config::EthernetConfig;
-use discovery::{
-    build_beacon, parse_beacon, DiscoveryBuffer, FRAME_TYPE_BEACON, FRAME_TYPE_DATA,
-};
-use socket::{AsyncPacketSocket, PacketSocket, ETHERNET_BROADCAST};
+use discovery::{DiscoveryBuffer, FRAME_TYPE_BEACON, FRAME_TYPE_DATA, build_beacon, parse_beacon};
+use socket::{AsyncPacketSocket, ETHERNET_BROADCAST, PacketSocket};
 use stats::EthernetStats;
 
 use secp256k1::XOnlyPublicKey;
@@ -410,8 +408,7 @@ async fn ethernet_receive_loop(
                             trace!("Data frame too short ({len} bytes), ignoring");
                             continue;
                         }
-                        let payload_len =
-                            u16::from_le_bytes([buf[1], buf[2]]) as usize;
+                        let payload_len = u16::from_le_bytes([buf[1], buf[2]]) as usize;
                         if payload_len > len - 3 {
                             trace!(
                                 "Data frame length field ({payload_len}) exceeds \
@@ -442,9 +439,7 @@ async fn ethernet_receive_loop(
                     FRAME_TYPE_BEACON => {
                         stats.record_beacon_recv();
 
-                        if discovery_enabled
-                            && let Some(pubkey) = parse_beacon(&buf[..len])
-                        {
+                        if discovery_enabled && let Some(pubkey) = parse_beacon(&buf[..len]) {
                             discovery_buffer.add_peer(src_mac, pubkey);
                             trace!(
                                 transport_id = %transport_id,

src/transport/tcp/mod.rs

@@ -41,8 +41,8 @@ use std::net::SocketAddr;
 use std::sync::Arc;
 use std::time::Duration;
 use tokio::io::AsyncWriteExt;
-use tokio::net::{TcpListener, TcpStream};
 use tokio::net::tcp::OwnedWriteHalf;
+use tokio::net::{TcpListener, TcpStream};
 use tokio::sync::Mutex;
 use tokio::task::JoinHandle;
 use tokio::time::Instant;
@@ -362,7 +362,8 @@ impl TcpTransport {
         };
 
         // Configure socket options via socket2
-        let std_stream = stream.into_std()
+        let std_stream = stream
+            .into_std()
             .map_err(|e| TransportError::StartFailed(format!("into_std: {}", e)))?;
         configure_socket(&std_stream, &self.config)?;
 
@@ -385,7 +386,16 @@ impl TcpTransport {
         let mtu = mss_mtu;
 
         let recv_task = tokio::spawn(async move {
-            tcp_receive_loop(read_half, transport_id, remote_addr.clone(), packet_tx, pool, mtu, recv_stats).await;
+            tcp_receive_loop(
+                read_half,
+                transport_id,
+                remote_addr.clone(),
+                packet_tx,
+                pool,
+                mtu,
+                recv_stats,
+            )
+            .await;
         });
 
         let conn = TcpConnection {
@@ -521,7 +531,8 @@ impl TcpTransport {
             };
 
             // Configure socket options via socket2
-            let std_stream = stream.into_std()
+            let std_stream = stream
+                .into_std()
                 .map_err(|e| TransportError::StartFailed(format!("into_std: {}", e)))?;
             configure_socket(&std_stream, &config)?;
 
@@ -589,9 +600,7 @@ impl TcpTransport {
                 self.promote_connection(addr, stream, mss_mtu);
                 ConnectionState::Connected
             }
-            Some(Ok(Err(e))) => {
-                ConnectionState::Failed(format!("{}", e))
-            }
+            Some(Ok(Err(e))) => ConnectionState::Failed(format!("{}", e)),
             Some(Err(e)) => {
                 // JoinError (panic or cancel)
                 ConnectionState::Failed(format!("task failed: {}", e))
@@ -737,7 +746,14 @@ async fn accept_loop(
     cfg: AcceptConfig,
     stats: Arc<TcpStats>,
 ) {
-    let AcceptConfig { mtu, max_inbound, nodelay, keepalive_secs, recv_buf, send_buf } = cfg;
+    let AcceptConfig {
+        mtu,
+        max_inbound,
+        nodelay,
+        keepalive_secs,
+        recv_buf,
+        send_buf,
+    } = cfg;
     debug!(transport_id = %transport_id, "TCP accept loop starting");
 
     loop {
@@ -771,7 +787,13 @@ async fn accept_loop(
                     }
                 };
 
-                if let Err(e) = configure_accepted_socket(&std_stream, nodelay, keepalive_secs, recv_buf, send_buf) {
+                if let Err(e) = configure_accepted_socket(
+                    &std_stream,
+                    nodelay,
+                    keepalive_secs,
+                    recv_buf,
+                    send_buf,
+                ) {
                     warn!(
                         transport_id = %transport_id,
                         peer_addr = %peer_addr,
@@ -886,11 +908,7 @@ async fn tcp_receive_loop(
                     "TCP packet received"
                 );
 
-                let packet = ReceivedPacket::new(
-                    transport_id,
-                    remote_addr.clone(),
-                    data,
-                );
+                let packet = ReceivedPacket::new(transport_id, remote_addr.clone(), data);
 
                 if packet_tx.send(packet).await.is_err() {
                     debug!(
@@ -934,26 +952,30 @@ fn configure_socket(
     stream: &std::net::TcpStream,
     config: &TcpConfig,
 ) -> Result<(), TransportError> {
-    let socket = socket2::SockRef::from(stream).try_clone()
+    let socket = socket2::SockRef::from(stream)
+        .try_clone()
         .map_err(|e| TransportError::StartFailed(format!("clone socket: {}", e)))?;
 
     // TCP_NODELAY
-    socket.set_tcp_nodelay(config.nodelay())
+    socket
+        .set_tcp_nodelay(config.nodelay())
         .map_err(|e| TransportError::StartFailed(format!("set nodelay: {}", e)))?;
 
     // Keepalive
     let keepalive_secs = config.keepalive_secs();
     if keepalive_secs > 0 {
-        let keepalive = TcpKeepalive::new()
-            .with_time(Duration::from_secs(keepalive_secs));
-        socket.set_tcp_keepalive(&keepalive)
+        let keepalive = TcpKeepalive::new().with_time(Duration::from_secs(keepalive_secs));
+        socket
+            .set_tcp_keepalive(&keepalive)
             .map_err(|e| TransportError::StartFailed(format!("set keepalive: {}", e)))?;
     }
 
     // Buffer sizes
-    socket.set_recv_buffer_size(config.recv_buf_size())
+    socket
+        .set_recv_buffer_size(config.recv_buf_size())
         .map_err(|e| TransportError::StartFailed(format!("set recv buffer: {}", e)))?;
-    socket.set_send_buffer_size(config.send_buf_size())
+    socket
+        .set_send_buffer_size(config.send_buf_size())
         .map_err(|e| TransportError::StartFailed(format!("set send buffer: {}", e)))?;
 
     Ok(())
@@ -967,22 +989,26 @@ fn configure_accepted_socket(
     recv_buf: usize,
     send_buf: usize,
 ) -> Result<(), TransportError> {
-    let socket = socket2::SockRef::from(stream).try_clone()
+    let socket = socket2::SockRef::from(stream)
+        .try_clone()
         .map_err(|e| TransportError::StartFailed(format!("clone socket: {}", e)))?;
 
-    socket.set_tcp_nodelay(nodelay)
+    socket
+        .set_tcp_nodelay(nodelay)
         .map_err(|e| TransportError::StartFailed(format!("set nodelay: {}", e)))?;
 
     if keepalive_secs > 0 {
-        let keepalive = TcpKeepalive::new()
-            .with_time(Duration::from_secs(keepalive_secs));
-        socket.set_tcp_keepalive(&keepalive)
+        let keepalive = TcpKeepalive::new().with_time(Duration::from_secs(keepalive_secs));
+        socket
+            .set_tcp_keepalive(&keepalive)
             .map_err(|e| TransportError::StartFailed(format!("set keepalive: {}", e)))?;
     }
 
-    socket.set_recv_buffer_size(recv_buf)
+    socket
+        .set_recv_buffer_size(recv_buf)
         .map_err(|e| TransportError::StartFailed(format!("set recv buffer: {}", e)))?;
-    socket.set_send_buffer_size(send_buf)
+    socket
+        .set_send_buffer_size(send_buf)
         .map_err(|e| TransportError::StartFailed(format!("set send buffer: {}", e)))?;
 
     Ok(())
@@ -1028,7 +1054,7 @@ fn read_mss_mtu(stream: &std::net::TcpStream, default_mtu: u16) -> u16 {
 mod tests {
     use super::*;
     use crate::transport::packet_channel;
-    use tokio::time::{timeout, Duration};
+    use tokio::time::{Duration, timeout};
 
     fn make_config() -> TcpConfig {
         TcpConfig {
@@ -1064,7 +1090,8 @@ mod tests {
     #[tokio::test]
     async fn test_start_outbound_only() {
         let (tx, _rx) = packet_channel(100);
-        let mut transport = TcpTransport::new(TransportId::new(1), None, make_outbound_config(), tx);
+        let mut transport =
+            TcpTransport::new(TransportId::new(1), None, make_outbound_config(), tx);
 
         transport.start_async().await.unwrap();
         assert_eq!(transport.state(), TransportState::Up);
@@ -1135,10 +1162,7 @@ mod tests {
         }
 
         let bytes_sent = t1
-            .send_async(
-                &TransportAddr::from_string(&addr2.to_string()),
-                &frame,
-            )
+            .send_async(&TransportAddr::from_string(&addr2.to_string()), &frame)
             .await
             .unwrap();
         assert_eq!(bytes_sent, frame.len());
@@ -1176,12 +1200,9 @@ mod tests {
         msg1_frame[2..4].copy_from_slice(&110u16.to_le_bytes()); // payload_len = 110
 
         // Send from t1 to t2
-        t1.send_async(
-            &TransportAddr::from_string(&addr2.to_string()),
-            &msg1_frame,
-        )
-        .await
-        .unwrap();
+        t1.send_async(&TransportAddr::from_string(&addr2.to_string()), &msg1_frame)
+            .await
+            .unwrap();
 
         let packet = timeout(Duration::from_secs(2), rx2.recv())
             .await
@@ -1196,12 +1217,9 @@ mod tests {
         msg2_frame[2..4].copy_from_slice(&65u16.to_le_bytes()); // payload_len = 65
 
         // Send from t2 to t1
-        t2.send_async(
-            &TransportAddr::from_string(&addr1.to_string()),
-            &msg2_frame,
-        )
-        .await
-        .unwrap();
+        t2.send_async(&TransportAddr::from_string(&addr1.to_string()), &msg2_frame)
+            .await
+            .unwrap();
 
         let packet = timeout(Duration::from_secs(2), rx1.recv())
             .await
@@ -1226,7 +1244,10 @@ mod tests {
 
         // Try to connect to a non-routable address (should timeout)
         let result = transport
-            .send_async(&TransportAddr::from_string("192.0.2.1:2121"), b"\x00\x00\x04\x00test1234567890123456789012345678")
+            .send_async(
+                &TransportAddr::from_string("192.0.2.1:2121"),
+                b"\x00\x00\x04\x00test1234567890123456789012345678",
+            )
             .await;
 
         assert!(result.is_err());
@@ -1410,8 +1431,7 @@ mod tests {
 
         t1.send_async(&remote, &msg1).await.unwrap();
 
-        let packet = timeout(Duration::from_secs(2), rx1.recv())
-            .await;
+        let packet = timeout(Duration::from_secs(2), rx1.recv()).await;
         // We receive on rx1 but that's the wrong receiver — t2's rx gets the packet
         // Just verify send didn't error
         drop(packet);
@@ -1472,7 +1492,10 @@ mod tests {
         // Connect first time
         t1.connect_async(&remote).await.unwrap();
         tokio::time::sleep(Duration::from_millis(200)).await;
-        assert_eq!(t1.connection_state_sync(&remote), ConnectionState::Connected);
+        assert_eq!(
+            t1.connection_state_sync(&remote),
+            ConnectionState::Connected
+        );
 
         // Second connect should be a no-op (already connected)
         t1.connect_async(&remote).await.unwrap();
@@ -1498,7 +1521,10 @@ mod tests {
         // Connect first, then send
         t1.connect_async(&remote).await.unwrap();
         tokio::time::sleep(Duration::from_millis(200)).await;
-        assert_eq!(t1.connection_state_sync(&remote), ConnectionState::Connected);
+        assert_eq!(
+            t1.connection_state_sync(&remote),
+            ConnectionState::Connected
+        );
 
         // Build valid FMP msg1 frame
         let mut msg1 = vec![0xAA; 114];
@@ -1524,9 +1550,7 @@ mod tests {
         let (tx, _rx) = packet_channel(100);
         let transport = TcpTransport::new(TransportId::new(1), None, make_config(), tx);
 
-        let state = transport.connection_state_sync(
-            &TransportAddr::from_string("unknown:1234"),
-        );
+        let state = transport.connection_state_sync(&TransportAddr::from_string("unknown:1234"));
         assert_eq!(state, ConnectionState::None);
     }
 
@@ -1605,10 +1629,7 @@ mod tests {
             tokio::time::sleep(Duration::from_millis(100)).await;
         }
 
-        assert_eq!(
-            t1.connection_state_sync(&addr),
-            ConnectionState::Connected,
-        );
+        assert_eq!(t1.connection_state_sync(&addr), ConnectionState::Connected,);
 
         t1.stop_async().await.unwrap();
         t2.stop_async().await.unwrap();

src/transport/tcp/stream.rs

@@ -31,7 +31,10 @@ pub enum StreamError {
     /// Unknown FMP phase byte — protocol error, close connection.
     UnknownPhase(u8),
     /// Payload length exceeds the connection's MTU — corrupted or malicious.
-    PayloadTooLarge { payload_len: u16, max_payload_len: u16 },
+    PayloadTooLarge {
+        payload_len: u16,
+        max_payload_len: u16,
+    },
     /// Handshake packet has unexpected payload_len for its phase.
     HandshakeSizeMismatch { phase: u8, expected: u16, got: u16 },
     /// I/O error (including EOF).
@@ -43,11 +46,26 @@ impl std::fmt::Display for StreamError {
         match self {
             StreamError::UnknownVersion(v) => write!(f, "unknown FMP version: {}", v),
             StreamError::UnknownPhase(p) => write!(f, "unknown FMP phase: 0x{:02x}", p),
-            StreamError::PayloadTooLarge { payload_len, max_payload_len } => {
-                write!(f, "payload_len {} exceeds max {}", payload_len, max_payload_len)
+            StreamError::PayloadTooLarge {
+                payload_len,
+                max_payload_len,
+            } => {
+                write!(
+                    f,
+                    "payload_len {} exceeds max {}",
+                    payload_len, max_payload_len
+                )
             }
-            StreamError::HandshakeSizeMismatch { phase, expected, got } => {
-                write!(f, "handshake phase 0x{:x}: expected payload_len {}, got {}", phase, expected, got)
+            StreamError::HandshakeSizeMismatch {
+                phase,
+                expected,
+                got,
+            } => {
+                write!(
+                    f,
+                    "handshake phase 0x{:x}: expected payload_len {}, got {}",
+                    phase, expected, got
+                )
             }
             StreamError::Io(e) => write!(f, "io: {}", e),
         }
@@ -172,7 +190,8 @@ mod tests {
     /// Build a minimal established frame with the given payload_len.
     /// Layout: [ver+phase:1][flags:1][payload_len:2 LE][12 bytes header][payload_len bytes][16 bytes tag]
     fn build_established_frame(payload_len: u16) -> Vec<u8> {
-        let total = PREFIX_SIZE + ESTABLISHED_REMAINING_HEADER + payload_len as usize + AEAD_TAG_SIZE;
+        let total =
+            PREFIX_SIZE + ESTABLISHED_REMAINING_HEADER + payload_len as usize + AEAD_TAG_SIZE;
         let mut frame = vec![0u8; total];
         frame[0] = 0x00; // ver=0, phase=0 (established)
         frame[1] = 0x00; // flags
@@ -304,7 +323,10 @@ mod tests {
 
         let mut cursor = Cursor::new(frame);
         let err = read_fmp_packet(&mut cursor, 1400).await.unwrap_err();
-        assert!(matches!(err, StreamError::HandshakeSizeMismatch { phase: 0x1, .. }));
+        assert!(matches!(
+            err,
+            StreamError::HandshakeSizeMismatch { phase: 0x1, .. }
+        ));
     }
 
     #[tokio::test]
@@ -316,7 +338,10 @@ mod tests {
 
         let mut cursor = Cursor::new(frame);
         let err = read_fmp_packet(&mut cursor, 1400).await.unwrap_err();
-        assert!(matches!(err, StreamError::HandshakeSizeMismatch { phase: 0x2, .. }));
+        assert!(matches!(
+            err,
+            StreamError::HandshakeSizeMismatch { phase: 0x2, .. }
+        ));
     }
 
     #[tokio::test]

src/transport/tor/control.rs

@@ -6,11 +6,11 @@
 use std::fmt;
 use std::path::{Path, PathBuf};
 
+use serde::Serialize;
 use tokio::io::{AsyncBufReadExt, AsyncRead, AsyncWrite, AsyncWriteExt, BufReader};
 use tokio::net::TcpStream;
 #[cfg(unix)]
 use tokio::net::UnixStream;
-use serde::Serialize;
 use tracing::debug;
 
 // ============================================================================
@@ -67,10 +67,7 @@ impl ControlAuth {
     ///
     /// - `"cookie"` or `"cookie:/path/to/cookie"` → Cookie auth
     /// - `"password:secret"` → Password auth
-    pub fn from_config(
-        auth_str: &str,
-        default_cookie_path: &str,
-    ) -> Result<Self, TorControlError> {
+    pub fn from_config(auth_str: &str, default_cookie_path: &str) -> Result<Self, TorControlError> {
         if auth_str == "cookie" {
             Ok(Self::Cookie(PathBuf::from(default_cookie_path)))
         } else if let Some(path) = auth_str.strip_prefix("cookie:") {
@@ -286,10 +283,7 @@ impl TorControlClient {
     pub async fn traffic_read(&mut self) -> Result<u64, TorControlError> {
         let value = self.getinfo("traffic/read").await?;
         value.trim().parse::<u64>().map_err(|_| {
-            TorControlError::ProtocolError(format!(
-                "invalid traffic/read value: '{}'",
-                value
-            ))
+            TorControlError::ProtocolError(format!("invalid traffic/read value: '{}'", value))
         })
     }
 
@@ -297,10 +291,7 @@ impl TorControlClient {
     pub async fn traffic_written(&mut self) -> Result<u64, TorControlError> {
         let value = self.getinfo("traffic/written").await?;
         value.trim().parse::<u64>().map_err(|_| {
-            TorControlError::ProtocolError(format!(
-                "invalid traffic/written value: '{}'",
-                value
-            ))
+            TorControlError::ProtocolError(format!("invalid traffic/written value: '{}'", value))
         })
     }
 
@@ -327,7 +318,10 @@ impl TorControlClient {
     /// Returns a list of addresses Tor is listening on for SOCKS connections.
     pub async fn socks_listeners(&mut self) -> Result<Vec<String>, TorControlError> {
         let value = self.getinfo("net/listeners/socks").await?;
-        Ok(value.split_whitespace().map(|s| s.trim_matches('"').to_string()).collect())
+        Ok(value
+            .split_whitespace()
+            .map(|s| s.trim_matches('"').to_string())
+            .collect())
     }
 
     /// Collect all monitoring info in a single batch of queries.
@@ -336,7 +330,10 @@ impl TorControlClient {
         let circuit_established = self.is_circuit_established().await.unwrap_or(false);
         let traffic_read = self.traffic_read().await.unwrap_or(0);
         let traffic_written = self.traffic_written().await.unwrap_or(0);
-        let network_liveness = self.network_liveness().await.unwrap_or_else(|_| "unknown".into());
+        let network_liveness = self
+            .network_liveness()
+            .await
+            .unwrap_or_else(|_| "unknown".into());
         let version = self.version().await.unwrap_or_else(|_| "unknown".into());
         let dormant = self.is_dormant().await.unwrap_or(false);
 
@@ -393,10 +390,7 @@ impl TorControlClient {
             }
 
             let code: u16 = line[..3].parse().map_err(|_| {
-                TorControlError::ProtocolError(format!(
-                    "invalid response code in: '{}'",
-                    line
-                ))
+                TorControlError::ProtocolError(format!("invalid response code in: '{}'", line))
             })?;
 
             let separator = line.as_bytes()[3];
@@ -426,8 +420,7 @@ impl TorControlClient {
                                 "connection closed during multi-line response".into(),
                             ));
                         }
-                        let dot_line =
-                            line_buf.trim_end_matches(['\r', '\n']);
+                        let dot_line = line_buf.trim_end_matches(['\r', '\n']);
                         if dot_line == "." {
                             break;
                         }
@@ -464,7 +457,11 @@ struct ControlResponse {
 /// Read a Tor control cookie file (32 bytes of raw binary).
 fn read_cookie_file(path: &Path) -> Result<Vec<u8>, TorControlError> {
     let data = std::fs::read(path).map_err(|e| {
-        TorControlError::AuthFailed(format!("failed to read cookie file '{}': {}", path.display(), e))
+        TorControlError::AuthFailed(format!(
+            "failed to read cookie file '{}': {}",
+            path.display(),
+            e
+        ))
     })?;
 
     if data.len() != 32 {
@@ -644,7 +641,9 @@ mod tests {
     #[tokio::test]
     async fn test_authenticate_password() {
         let mock = MockTorControlServer::start().await;
-        let mut client = TorControlClient::connect(&mock.addr().to_string()).await.unwrap();
+        let mut client = TorControlClient::connect(&mock.addr().to_string())
+            .await
+            .unwrap();
 
         let auth = ControlAuth::Password("testpass".to_string());
         client.authenticate(&auth).await.unwrap();
@@ -659,7 +658,9 @@ mod tests {
         let cookie_path = dir.path().join("cookie");
         std::fs::write(&cookie_path, [0xAA; 32]).unwrap();
 
-        let mut client = TorControlClient::connect(&mock.addr().to_string()).await.unwrap();
+        let mut client = TorControlClient::connect(&mock.addr().to_string())
+            .await
+            .unwrap();
         let auth = ControlAuth::Cookie(cookie_path);
         client.authenticate(&auth).await.unwrap();
     }
@@ -667,7 +668,9 @@ mod tests {
     #[tokio::test]
     async fn test_get_bootstrap_phase() {
         let mock = MockTorControlServer::start().await;
-        let mut client = TorControlClient::connect(&mock.addr().to_string()).await.unwrap();
+        let mut client = TorControlClient::connect(&mock.addr().to_string())
+            .await
+            .unwrap();
 
         let auth = ControlAuth::Password("testpass".to_string());
         client.authenticate(&auth).await.unwrap();
@@ -682,7 +685,9 @@ mod tests {
             reject_auth: true,
         })
         .await;
-        let mut client = TorControlClient::connect(&mock.addr().to_string()).await.unwrap();
+        let mut client = TorControlClient::connect(&mock.addr().to_string())
+            .await
+            .unwrap();
 
         let auth = ControlAuth::Password("wrongpass".to_string());
         let result = client.authenticate(&auth).await;
@@ -705,8 +710,13 @@ mod tests {
     #[tokio::test]
     async fn test_is_circuit_established() {
         let mock = MockTorControlServer::start().await;
-        let mut client = TorControlClient::connect(&mock.addr().to_string()).await.unwrap();
-        client.authenticate(&ControlAuth::Password("test".into())).await.unwrap();
+        let mut client = TorControlClient::connect(&mock.addr().to_string())
+            .await
+            .unwrap();
+        client
+            .authenticate(&ControlAuth::Password("test".into()))
+            .await
+            .unwrap();
 
         assert!(client.is_circuit_established().await.unwrap());
     }
@@ -714,8 +724,13 @@ mod tests {
     #[tokio::test]
     async fn test_traffic_counters() {
         let mock = MockTorControlServer::start().await;
-        let mut client = TorControlClient::connect(&mock.addr().to_string()).await.unwrap();
-        client.authenticate(&ControlAuth::Password("test".into())).await.unwrap();
+        let mut client = TorControlClient::connect(&mock.addr().to_string())
+            .await
+            .unwrap();
+        client
+            .authenticate(&ControlAuth::Password("test".into()))
+            .await
+            .unwrap();
 
         assert_eq!(client.traffic_read().await.unwrap(), 1048576);
         assert_eq!(client.traffic_written().await.unwrap(), 524288);
@@ -724,8 +739,13 @@ mod tests {
     #[tokio::test]
     async fn test_network_liveness() {
         let mock = MockTorControlServer::start().await;
-        let mut client = TorControlClient::connect(&mock.addr().to_string()).await.unwrap();
-        client.authenticate(&ControlAuth::Password("test".into())).await.unwrap();
+        let mut client = TorControlClient::connect(&mock.addr().to_string())
+            .await
+            .unwrap();
+        client
+            .authenticate(&ControlAuth::Password("test".into()))
+            .await
+            .unwrap();
 
         assert_eq!(client.network_liveness().await.unwrap(), "up");
     }
@@ -733,8 +753,13 @@ mod tests {
     #[tokio::test]
     async fn test_version() {
         let mock = MockTorControlServer::start().await;
-        let mut client = TorControlClient::connect(&mock.addr().to_string()).await.unwrap();
-        client.authenticate(&ControlAuth::Password("test".into())).await.unwrap();
+        let mut client = TorControlClient::connect(&mock.addr().to_string())
+            .await
+            .unwrap();
+        client
+            .authenticate(&ControlAuth::Password("test".into()))
+            .await
+            .unwrap();
 
         assert_eq!(client.version().await.unwrap(), "0.4.8.10");
     }
@@ -742,8 +767,13 @@ mod tests {
     #[tokio::test]
     async fn test_dormant() {
         let mock = MockTorControlServer::start().await;
-        let mut client = TorControlClient::connect(&mock.addr().to_string()).await.unwrap();
-        client.authenticate(&ControlAuth::Password("test".into())).await.unwrap();
+        let mut client = TorControlClient::connect(&mock.addr().to_string())
+            .await
+            .unwrap();
+        client
+            .authenticate(&ControlAuth::Password("test".into()))
+            .await
+            .unwrap();
 
         assert!(!client.is_dormant().await.unwrap());
     }
@@ -751,8 +781,13 @@ mod tests {
     #[tokio::test]
     async fn test_socks_listeners() {
         let mock = MockTorControlServer::start().await;
-        let mut client = TorControlClient::connect(&mock.addr().to_string()).await.unwrap();
-        client.authenticate(&ControlAuth::Password("test".into())).await.unwrap();
+        let mut client = TorControlClient::connect(&mock.addr().to_string())
+            .await
+            .unwrap();
+        client
+            .authenticate(&ControlAuth::Password("test".into()))
+            .await
+            .unwrap();
 
         let listeners = client.socks_listeners().await.unwrap();
         assert_eq!(listeners, vec!["127.0.0.1:9050"]);
@@ -761,8 +796,13 @@ mod tests {
     #[tokio::test]
     async fn test_monitoring_snapshot() {
         let mock = MockTorControlServer::start().await;
-        let mut client = TorControlClient::connect(&mock.addr().to_string()).await.unwrap();
-        client.authenticate(&ControlAuth::Password("test".into())).await.unwrap();
+        let mut client = TorControlClient::connect(&mock.addr().to_string())
+            .await
+            .unwrap();
+        client
+            .authenticate(&ControlAuth::Password("test".into()))
+            .await
+            .unwrap();
 
         let info = client.monitoring_snapshot().await.unwrap();
         assert_eq!(info.bootstrap, 100);

src/transport/tor/mock_control.rs

@@ -33,7 +33,9 @@ impl MockTorControlServer {
 
     /// Start a mock control server with custom options.
     pub async fn start_with_options(options: MockOptions) -> Self {
-        let listener = TcpListener::bind("127.0.0.1:0").await.expect("bind mock control");
+        let listener = TcpListener::bind("127.0.0.1:0")
+            .await
+            .expect("bind mock control");
         let addr = listener.local_addr().expect("local addr");
 
         let handle = tokio::spawn(async move {
@@ -63,45 +65,39 @@ impl MockTorControlServer {
                         let _ = writer.write_all(b"250 OK\r\n").await;
                     }
                 } else if !authenticated {
-                    let _ = writer
-                        .write_all(b"514 Authentication required\r\n")
-                        .await;
+                    let _ = writer.write_all(b"514 Authentication required\r\n").await;
                 } else if cmd.starts_with("GETINFO status/bootstrap-phase") {
                     let _ = writer.write_all(
                         b"250-status/bootstrap-phase=NOTICE BOOTSTRAP PROGRESS=100 TAG=done SUMMARY=\"Done\"\r\n250 OK\r\n",
                     ).await;
                 } else if cmd.starts_with("GETINFO status/circuit-established") {
-                    let _ = writer.write_all(
-                        b"250-status/circuit-established=1\r\n250 OK\r\n",
-                    ).await;
-                } else if cmd.starts_with("GETINFO traffic/read") {
-                    let _ = writer.write_all(
-                        b"250-traffic/read=1048576\r\n250 OK\r\n",
-                    ).await;
-                } else if cmd.starts_with("GETINFO traffic/written") {
-                    let _ = writer.write_all(
-                        b"250-traffic/written=524288\r\n250 OK\r\n",
-                    ).await;
-                } else if cmd.starts_with("GETINFO network-liveness") {
-                    let _ = writer.write_all(
-                        b"250-network-liveness=up\r\n250 OK\r\n",
-                    ).await;
-                } else if cmd.starts_with("GETINFO version") {
-                    let _ = writer.write_all(
-                        b"250-version=0.4.8.10\r\n250 OK\r\n",
-                    ).await;
-                } else if cmd.starts_with("GETINFO dormant") {
-                    let _ = writer.write_all(
-                        b"250-dormant=0\r\n250 OK\r\n",
-                    ).await;
-                } else if cmd.starts_with("GETINFO net/listeners/socks") {
-                    let _ = writer.write_all(
-                        b"250-net/listeners/socks=\"127.0.0.1:9050\"\r\n250 OK\r\n",
-                    ).await;
-                } else {
                     let _ = writer
-                        .write_all(b"510 Unrecognized command\r\n")
+                        .write_all(b"250-status/circuit-established=1\r\n250 OK\r\n")
                         .await;
+                } else if cmd.starts_with("GETINFO traffic/read") {
+                    let _ = writer
+                        .write_all(b"250-traffic/read=1048576\r\n250 OK\r\n")
+                        .await;
+                } else if cmd.starts_with("GETINFO traffic/written") {
+                    let _ = writer
+                        .write_all(b"250-traffic/written=524288\r\n250 OK\r\n")
+                        .await;
+                } else if cmd.starts_with("GETINFO network-liveness") {
+                    let _ = writer
+                        .write_all(b"250-network-liveness=up\r\n250 OK\r\n")
+                        .await;
+                } else if cmd.starts_with("GETINFO version") {
+                    let _ = writer
+                        .write_all(b"250-version=0.4.8.10\r\n250 OK\r\n")
+                        .await;
+                } else if cmd.starts_with("GETINFO dormant") {
+                    let _ = writer.write_all(b"250-dormant=0\r\n250 OK\r\n").await;
+                } else if cmd.starts_with("GETINFO net/listeners/socks") {
+                    let _ = writer
+                        .write_all(b"250-net/listeners/socks=\"127.0.0.1:9050\"\r\n250 OK\r\n")
+                        .await;
+                } else {
+                    let _ = writer.write_all(b"510 Unrecognized command\r\n").await;
                 }
 
                 let _ = writer.flush().await;

src/transport/tor/mock_socks5.rs

@@ -70,7 +70,10 @@ impl MockSocks5Server {
             // === Method negotiation ===
             // Client sends: [version, nmethods, methods...]
             let mut ver_nmethods = [0u8; 2];
-            client.read_exact(&mut ver_nmethods).await.expect("read version+nmethods");
+            client
+                .read_exact(&mut ver_nmethods)
+                .await
+                .expect("read version+nmethods");
             assert_eq!(ver_nmethods[0], SOCKS_VERSION, "expected SOCKS5");
             let nmethods = ver_nmethods[1] as usize;
 
@@ -87,14 +90,23 @@ impl MockSocks5Server {
             };
 
             // Reply: [version, selected_method]
-            client.write_all(&[SOCKS_VERSION, selected]).await.expect("write method reply");
+            client
+                .write_all(&[SOCKS_VERSION, selected])
+                .await
+                .expect("write method reply");
 
             // === Username/password sub-negotiation (RFC 1929) ===
             if selected == AUTH_PASSWORD {
                 // Client sends: [ver(1), ulen(1), uname(ulen), plen(1), passwd(plen)]
                 let mut subneg_header = [0u8; 2];
-                client.read_exact(&mut subneg_header).await.expect("read subneg header");
-                assert_eq!(subneg_header[0], AUTH_SUBNEG_VERSION, "expected auth subneg v1");
+                client
+                    .read_exact(&mut subneg_header)
+                    .await
+                    .expect("read subneg header");
+                assert_eq!(
+                    subneg_header[0], AUTH_SUBNEG_VERSION,
+                    "expected auth subneg v1"
+                );
 
                 let ulen = subneg_header[1] as usize;
                 let mut uname = vec![0u8; ulen];
@@ -107,14 +119,19 @@ impl MockSocks5Server {
                 client.read_exact(&mut passwd).await.expect("read password");
 
                 // Always accept (Tor uses these as isolation keys, not real auth)
-                client.write_all(&[AUTH_SUBNEG_VERSION, AUTH_SUBNEG_SUCCESS])
-                    .await.expect("write subneg reply");
+                client
+                    .write_all(&[AUTH_SUBNEG_VERSION, AUTH_SUBNEG_SUCCESS])
+                    .await
+                    .expect("write subneg reply");
             }
 
             // === Connect request ===
             // Client sends: [version, cmd, rsv, atyp, addr..., port]
             let mut header = [0u8; 4];
-            client.read_exact(&mut header).await.expect("read connect header");
+            client
+                .read_exact(&mut header)
+                .await
+                .expect("read connect header");
             assert_eq!(header[0], SOCKS_VERSION);
             assert_eq!(header[1], CMD_CONNECT);
 
@@ -122,14 +139,23 @@ impl MockSocks5Server {
             match header[3] {
                 ATYP_IPV4 => {
                     let mut addr_port = [0u8; 6]; // 4 IP + 2 port
-                    client.read_exact(&mut addr_port).await.expect("read IPv4 addr");
+                    client
+                        .read_exact(&mut addr_port)
+                        .await
+                        .expect("read IPv4 addr");
                 }
                 ATYP_DOMAIN => {
                     let mut len_buf = [0u8; 1];
-                    client.read_exact(&mut len_buf).await.expect("read domain len");
+                    client
+                        .read_exact(&mut len_buf)
+                        .await
+                        .expect("read domain len");
                     let domain_len = len_buf[0] as usize;
                     let mut domain_port = vec![0u8; domain_len + 2]; // domain + 2 port
-                    client.read_exact(&mut domain_port).await.expect("read domain addr");
+                    client
+                        .read_exact(&mut domain_port)
+                        .await
+                        .expect("read domain addr");
                 }
                 other => panic!("unsupported ATYP: {}", other),
             }
@@ -145,8 +171,12 @@ impl MockSocks5Server {
                 REP_SUCCESS,
                 0x00, // RSV
                 ATYP_IPV4,
-                0, 0, 0, 0, // bind addr
-                0, 0, // bind port
+                0,
+                0,
+                0,
+                0, // bind addr
+                0,
+                0, // bind port
             ];
             client.write_all(&reply).await.expect("write connect reply");
 

src/transport/tor/mod.rs

@@ -42,8 +42,8 @@ use std::net::SocketAddr;
 use std::sync::Arc;
 use std::time::Duration;
 use tokio::io::AsyncWriteExt;
-use tokio::net::{TcpListener, TcpStream};
 use tokio::net::tcp::OwnedWriteHalf;
+use tokio::net::{TcpListener, TcpStream};
 use tokio::sync::Mutex;
 use tokio::task::JoinHandle;
 use tokio::time::Instant;
@@ -92,16 +92,15 @@ fn parse_tor_addr(addr: &TransportAddr) -> Result<TorAddr, TransportError> {
     } else {
         // Hostname:port — pass through SOCKS5 for Tor-side DNS resolution
         let (host, port_str) = s.rsplit_once(':').ok_or_else(|| {
-            TransportError::InvalidAddress(format!(
-                "invalid address (expected host:port): {}", s
-            ))
-        })?;
-        let port: u16 = port_str.parse().map_err(|_| {
-            TransportError::InvalidAddress(format!("invalid port: {}", s))
+            TransportError::InvalidAddress(format!("invalid address (expected host:port): {}", s))
         })?;
+        let port: u16 = port_str
+            .parse()
+            .map_err(|_| TransportError::InvalidAddress(format!("invalid port: {}", s)))?;
         if !host.contains('.') {
             return Err(TransportError::InvalidAddress(format!(
-                "hostname must be fully qualified (contain a dot): {}", host
+                "hostname must be fully qualified (contain a dot): {}",
+                host
             )));
         }
         Ok(TorAddr::ClearnetHostname(host.to_string(), port))
@@ -306,17 +305,16 @@ impl TorTransport {
         }
 
         // Connect to Tor control port
-        let mut client = TorControlClient::connect(&control_addr).await.map_err(|e| {
-            self.stats.record_control_error();
-            TransportError::StartFailed(format!("Tor control port: {}", e))
-        })?;
+        let mut client = TorControlClient::connect(&control_addr)
+            .await
+            .map_err(|e| {
+                self.stats.record_control_error();
+                TransportError::StartFailed(format!("Tor control port: {}", e))
+            })?;
 
         // Authenticate
-        let auth = ControlAuth::from_config(
-            self.config.control_auth(),
-            self.config.cookie_path(),
-        )
-        .map_err(|e| TransportError::StartFailed(format!("Tor auth config: {}", e)))?;
+        let auth = ControlAuth::from_config(self.config.control_auth(), self.config.cookie_path())
+            .map_err(|e| TransportError::StartFailed(format!("Tor auth config: {}", e)))?;
 
         client.authenticate(&auth).await.map_err(|e| {
             self.stats.record_control_error();
@@ -370,9 +368,9 @@ impl TorTransport {
                 bind_addr, e
             ))
         })?;
-        let local_addr = listener.local_addr().map_err(|e| {
-            TransportError::StartFailed(format!("failed to get local addr: {}", e))
-        })?;
+        let local_addr = listener
+            .local_addr()
+            .map_err(|e| TransportError::StartFailed(format!("failed to get local addr: {}", e)))?;
 
         info!(
             onion_address = %onion_addr,
@@ -417,7 +415,8 @@ impl TorTransport {
     /// Non-fatal: logs a warning on failure and continues without monitoring.
     async fn try_connect_control_port(&mut self) {
         let control_addr = self.config.control_addr().to_string();
-        if !control_addr.starts_with('/') && !control_addr.starts_with("./")
+        if !control_addr.starts_with('/')
+            && !control_addr.starts_with("./")
             && let Err(e) = validate_host_port(&control_addr, "control_addr")
         {
             warn!(
@@ -441,20 +440,18 @@ impl TorTransport {
             }
         };
 
-        let auth = match ControlAuth::from_config(
-            self.config.control_auth(),
-            self.config.cookie_path(),
-        ) {
-            Ok(a) => a,
-            Err(e) => {
-                warn!(
-                    transport_id = %self.transport_id,
-                    error = %e,
-                    "Tor control auth config error, monitoring disabled"
-                );
-                return;
-            }
-        };
+        let auth =
+            match ControlAuth::from_config(self.config.control_auth(), self.config.cookie_path()) {
+                Ok(a) => a,
+                Err(e) => {
+                    warn!(
+                        transport_id = %self.transport_id,
+                        error = %e,
+                        "Tor control auth config error, monitoring disabled"
+                    );
+                    return;
+                }
+            };
 
         let mut client = client;
         if let Err(e) = client.authenticate(&auth).await {
@@ -567,9 +564,7 @@ impl TorTransport {
                     Ok(info) => {
                         // Log bootstrap milestones
                         for &milestone in &[25u8, 50, 75, 100] {
-                            if info.bootstrap >= milestone
-                                && last_bootstrap < milestone
-                            {
+                            if info.bootstrap >= milestone && last_bootstrap < milestone {
                                 info!(
                                     transport_id = %transport_id,
                                     bootstrap = info.bootstrap,
@@ -598,9 +593,7 @@ impl TorTransport {
                         last_bootstrap = info.bootstrap;
 
                         // Network liveness transitions
-                        if !last_liveness.is_empty()
-                            && info.network_liveness != last_liveness
-                        {
+                        if !last_liveness.is_empty() && info.network_liveness != last_liveness {
                             warn!(
                                 transport_id = %transport_id,
                                 from = %last_liveness,
@@ -732,16 +725,23 @@ impl TorTransport {
         let connect_start = Instant::now();
         let socks_result = tokio::time::timeout(Duration::from_millis(timeout_ms), async {
             match &tor_addr {
-                TorAddr::Onion(host, port)
-                | TorAddr::ClearnetHostname(host, port) => {
+                TorAddr::Onion(host, port) | TorAddr::ClearnetHostname(host, port) => {
                     Socks5Stream::connect_with_password(
-                        proxy_addr, (host.as_str(), *port), "fips", &isolation_key,
-                    ).await
+                        proxy_addr,
+                        (host.as_str(), *port),
+                        "fips",
+                        &isolation_key,
+                    )
+                    .await
                 }
                 TorAddr::Clearnet(socket_addr) => {
                     Socks5Stream::connect_with_password(
-                        proxy_addr, *socket_addr, "fips", &isolation_key,
-                    ).await
+                        proxy_addr,
+                        *socket_addr,
+                        "fips",
+                        &isolation_key,
+                    )
+                    .await
                 }
             }
         })
@@ -877,26 +877,28 @@ impl TorTransport {
         let task = tokio::spawn(async move {
             // SOCKS5 CONNECT through proxy with timeout.
             // Uses username/password auth for stream isolation (see connect()).
-            let socks_result = tokio::time::timeout(
-                Duration::from_millis(timeout_ms),
-                async {
-                    match &tor_addr {
-                        TorAddr::Onion(host, port)
-                        | TorAddr::ClearnetHostname(host, port) => {
-                            Socks5Stream::connect_with_password(
-                                proxy_addr.as_str(), (host.as_str(), *port),
-                                "fips", &isolation_key,
-                            ).await
-                        }
-                        TorAddr::Clearnet(socket_addr) => {
-                            Socks5Stream::connect_with_password(
-                                proxy_addr.as_str(), *socket_addr,
-                                "fips", &isolation_key,
-                            ).await
-                        }
+            let socks_result = tokio::time::timeout(Duration::from_millis(timeout_ms), async {
+                match &tor_addr {
+                    TorAddr::Onion(host, port) | TorAddr::ClearnetHostname(host, port) => {
+                        Socks5Stream::connect_with_password(
+                            proxy_addr.as_str(),
+                            (host.as_str(), *port),
+                            "fips",
+                            &isolation_key,
+                        )
+                        .await
                     }
-                },
-            )
+                    TorAddr::Clearnet(socket_addr) => {
+                        Socks5Stream::connect_with_password(
+                            proxy_addr.as_str(),
+                            *socket_addr,
+                            "fips",
+                            &isolation_key,
+                        )
+                        .await
+                    }
+                }
+            })
             .await;
 
             let stream = match socks_result {
@@ -1400,7 +1402,10 @@ mod tests {
         let tor_addr = parse_tor_addr(&addr).unwrap();
         match tor_addr {
             TorAddr::Clearnet(socket_addr) => {
-                assert_eq!(socket_addr, "192.168.1.1:8080".parse::<SocketAddr>().unwrap());
+                assert_eq!(
+                    socket_addr,
+                    "192.168.1.1:8080".parse::<SocketAddr>().unwrap()
+                );
             }
             _ => panic!("expected Clearnet variant"),
         }
@@ -1547,9 +1552,9 @@ mod tests {
     // Integration tests using MockSocks5Server
     // ========================================================================
 
-    use mock_socks5::MockSocks5Server;
-    use crate::transport::tcp::TcpTransport;
     use crate::config::TcpConfig;
+    use crate::transport::tcp::TcpTransport;
+    use mock_socks5::MockSocks5Server;
 
     /// msg1 wire size: 4 prefix + 4 sender_idx + 106 noise_msg1 = 114 bytes.
     const MSG1_WIRE_SIZE: usize = 114;
@@ -1597,13 +1602,10 @@ mod tests {
         tor.send_async(&target, &frame).await.unwrap();
 
         // Receive it on the destination
-        let received = tokio::time::timeout(
-            Duration::from_secs(5),
-            dest_rx.recv(),
-        )
-        .await
-        .expect("timeout waiting for packet")
-        .expect("channel closed");
+        let received = tokio::time::timeout(Duration::from_secs(5), dest_rx.recv())
+            .await
+            .expect("timeout waiting for packet")
+            .expect("channel closed");
 
         assert_eq!(received.data, frame);
 
@@ -1741,7 +1743,10 @@ mod tests {
     #[test]
     fn test_directory_service_config_defaults() {
         let config = DirectoryServiceConfig::default();
-        assert_eq!(config.hostname_file(), "/var/lib/tor/fips_onion_service/hostname");
+        assert_eq!(
+            config.hostname_file(),
+            "/var/lib/tor/fips_onion_service/hostname"
+        );
         assert_eq!(config.bind_addr(), "127.0.0.1:8443");
     }
 
@@ -1865,5 +1870,4 @@ mod tests {
         let err = format!("{}", result.unwrap_err());
         assert!(err.contains("directory"));
     }
-
 }

src/transport/udp/mod.rs

@@ -8,10 +8,10 @@ use super::{
 };
 mod socket;
 mod stats;
-use socket::{AsyncUdpSocket, UdpRawSocket};
-use stats::UdpStats;
 use super::resolve_socket_addr;
 use crate::config::UdpConfig;
+use socket::{AsyncUdpSocket, UdpRawSocket};
+use stats::UdpStats;
 use std::collections::HashMap;
 use std::net::SocketAddr;
 use std::sync::{Arc, Mutex as StdMutex};
@@ -125,7 +125,11 @@ impl UdpTransport {
     /// Query transport-local congestion indicators.
     pub fn congestion(&self) -> super::TransportCongestion {
         super::TransportCongestion {
-            recv_drops: Some(self.stats.kernel_drops.load(std::sync::atomic::Ordering::Relaxed)),
+            recv_drops: Some(
+                self.stats
+                    .kernel_drops
+                    .load(std::sync::atomic::Ordering::Relaxed),
+            ),
         }
     }
 
@@ -367,7 +371,7 @@ async fn udp_receive_loop(
 mod tests {
     use super::*;
     use crate::transport::packet_channel;
-    use tokio::time::{timeout, Duration};
+    use tokio::time::{Duration, timeout};
 
     fn make_config(port: u16) -> UdpConfig {
         UdpConfig {
@@ -444,7 +448,10 @@ mod tests {
             .expect("channel closed");
 
         assert_eq!(packet.data, data);
-        assert_eq!(packet.remote_addr.as_str(), Some(addr1.to_string().as_str()));
+        assert_eq!(
+            packet.remote_addr.as_str(),
+            Some(addr1.to_string().as_str())
+        );
 
         t1.stop_async().await.unwrap();
         t2.stop_async().await.unwrap();
@@ -615,7 +622,10 @@ mod tests {
         // Send using IP string address
         let data = b"hello via ip string";
         let bytes_sent = t1
-            .send_async(&TransportAddr::from_string(&format!("127.0.0.1:{}", port2)), data)
+            .send_async(
+                &TransportAddr::from_string(&format!("127.0.0.1:{}", port2)),
+                data,
+            )
             .await
             .unwrap();
         assert_eq!(bytes_sent, data.len());

src/transport/udp/socket.rs

@@ -184,8 +184,7 @@ impl UdpRawSocket {
         unsafe {
             let mut cmsg = libc::CMSG_FIRSTHDR(&msg);
             while !cmsg.is_null() {
-                if (*cmsg).cmsg_level == libc::SOL_SOCKET
-                    && (*cmsg).cmsg_type == libc::SO_RXQ_OVFL
+                if (*cmsg).cmsg_level == libc::SOL_SOCKET && (*cmsg).cmsg_type == libc::SO_RXQ_OVFL
                 {
                     let data = libc::CMSG_DATA(cmsg);
                     drops = std::ptr::read_unaligned(data as *const u32);
@@ -224,11 +223,7 @@ pub struct AsyncUdpSocket {
 
 impl AsyncUdpSocket {
     /// Send a payload to a destination address.
-    pub async fn send_to(
-        &self,
-        data: &[u8],
-        dest: &SocketAddr,
-    ) -> Result<usize, TransportError> {
+    pub async fn send_to(&self, data: &[u8], dest: &SocketAddr) -> Result<usize, TransportError> {
         loop {
             let mut guard = self
                 .inner
@@ -268,9 +263,7 @@ impl AsyncUdpSocket {
 }
 
 /// Convert a `libc::sockaddr_storage` to `std::net::SocketAddr`.
-fn sockaddr_to_socket_addr(
-    storage: &libc::sockaddr_storage,
-) -> std::io::Result<SocketAddr> {
+fn sockaddr_to_socket_addr(storage: &libc::sockaddr_storage) -> std::io::Result<SocketAddr> {
     match storage.ss_family as libc::c_int {
         libc::AF_INET => {
             let addr: &libc::sockaddr_in =

src/tree/coordinate.rs

@@ -80,12 +80,7 @@ impl TreeCoordinate {
         if addrs.is_empty() {
             return Err(TreeError::EmptyCoordinate);
         }
-        Ok(Self(
-            addrs
-                .into_iter()
-                .map(CoordEntry::addr_only)
-                .collect(),
-        ))
+        Ok(Self(addrs.into_iter().map(CoordEntry::addr_only).collect()))
     }
 
     /// Create a coordinate for a root node.

src/tree/declaration.rs

@@ -1,7 +1,7 @@
 //! Parent declarations for the spanning tree.
 
-use secp256k1::schnorr::Signature;
 use secp256k1::XOnlyPublicKey;
+use secp256k1::schnorr::Signature;
 use std::fmt;
 
 use super::TreeError;

src/tree/state.rs

@@ -157,7 +157,8 @@ impl TreeState {
     /// Only records a flap when the parent actually changes.
     pub fn set_parent(&mut self, parent_id: NodeAddr, sequence: u64, timestamp: u64) -> bool {
         let parent_changed = self.is_root() || *self.my_declaration.parent_id() != parent_id;
-        self.my_declaration = ParentDeclaration::new(self.my_node_addr, parent_id, sequence, timestamp);
+        self.my_declaration =
+            ParentDeclaration::new(self.my_node_addr, parent_id, sequence, timestamp);
         self.last_parent_switch = Some(Instant::now());
         // Record switch for flap detection only when parent actually changes;
         // coordinates will be recomputed when ancestry is available
@@ -228,8 +229,7 @@ impl TreeState {
             let dominated = match &best {
                 None => true,
                 Some((best_id, best_dist)) => {
-                    distance < *best_dist
-                        || (distance == *best_dist && peer_id < best_id)
+                    distance < *best_dist || (distance == *best_dist && peer_id < best_id)
                 }
             };
 
@@ -353,9 +353,7 @@ impl TreeState {
             match &best_peer {
                 None => best_peer = Some((*peer_id, eff_depth)),
                 Some((best_id, best_eff)) => {
-                    if eff_depth < *best_eff
-                        || (eff_depth == *best_eff && peer_id < best_id)
-                    {
+                    if eff_depth < *best_eff || (eff_depth == *best_eff && peer_id < best_id) {
                         best_peer = Some((*peer_id, eff_depth));
                     }
                 }
@@ -372,7 +370,11 @@ impl TreeState {
         // --- Mandatory switches (bypass hold-down and hysteresis) ---
 
         // If our current parent is gone from peer_ancestry, our path is broken — always switch
-        if !self.is_root() && !self.peer_ancestry.contains_key(self.my_declaration.parent_id()) {
+        if !self.is_root()
+            && !self
+                .peer_ancestry
+                .contains_key(self.my_declaration.parent_id())
+        {
             return Some(best_peer_id);
         }
 
@@ -411,7 +413,11 @@ impl TreeState {
         let current_parent_cost = peer_costs
             .get(self.my_declaration.parent_id())
             .copied()
-            .unwrap_or(if peer_costs.is_empty() { 1.0 } else { f64::INFINITY });
+            .unwrap_or(if peer_costs.is_empty() {
+                1.0
+            } else {
+                f64::INFINITY
+            });
         let current_parent_coords = self.peer_ancestry.get(self.my_declaration.parent_id());
         let current_parent_eff = match current_parent_coords {
             Some(coords) => coords.depth() as f64 + current_parent_cost,
@@ -451,8 +457,7 @@ impl TreeState {
             .map(|d| d.as_secs())
             .unwrap_or(0);
         let new_seq = self.my_declaration.sequence() + 1;
-        self.my_declaration =
-            ParentDeclaration::self_root(self.my_node_addr, new_seq, timestamp);
+        self.my_declaration = ParentDeclaration::self_root(self.my_node_addr, new_seq, timestamp);
         self.recompute_coords();
         true
     }

src/upper/dns.rs

@@ -12,8 +12,8 @@
 
 use crate::upper::hosts::{HostMap, HostMapReloader};
 use crate::{NodeAddr, PeerIdentity};
-use simple_dns::rdata::{RData, AAAA};
-use simple_dns::{Packet, Name, ResourceRecord, CLASS, RCODE, PacketFlag, QTYPE, TYPE};
+use simple_dns::rdata::{AAAA, RData};
+use simple_dns::{CLASS, Name, Packet, PacketFlag, QTYPE, RCODE, ResourceRecord, TYPE};
 use std::net::Ipv6Addr;
 use tracing::{debug, warn};
 
@@ -109,16 +109,10 @@ pub fn handle_dns_packet(
     let mut response = query.into_reply();
     response.set_flags(PacketFlag::AUTHORITATIVE_ANSWER);
 
-    if is_aaaa
-        && let Some((ipv6, node_addr, pubkey)) = resolve_fips_query_with_hosts(&qname, hosts)
+    if is_aaaa && let Some((ipv6, node_addr, pubkey)) = resolve_fips_query_with_hosts(&qname, hosts)
     {
         let name = Name::new_unchecked(&qname).into_owned();
-        let record = ResourceRecord::new(
-            name,
-            CLASS::IN,
-            ttl,
-            RData::AAAA(AAAA::from(ipv6)),
-        );
+        let record = ResourceRecord::new(name, CLASS::IN, ttl, RData::AAAA(AAAA::from(ipv6)));
         response.answers.push(record);
 
         let identity = DnsResolvedIdentity { node_addr, pubkey };
@@ -359,7 +353,10 @@ mod tests {
         assert!(result.is_some(), "should handle hostname AAAA query");
 
         let (response_bytes, identity_opt) = result.unwrap();
-        assert!(identity_opt.is_some(), "should produce identity for hostname");
+        assert!(
+            identity_opt.is_some(),
+            "should produce identity for hostname"
+        );
 
         let response = Packet::parse(&response_bytes).unwrap();
         assert_eq!(response.answers.len(), 1);
@@ -380,7 +377,10 @@ mod tests {
         assert!(result.is_some());
 
         let (response_bytes, identity_opt) = result.unwrap();
-        assert!(identity_opt.is_none(), "should not produce identity for unknown");
+        assert!(
+            identity_opt.is_none(),
+            "should not produce identity for unknown"
+        );
 
         let response = Packet::parse(&response_bytes).unwrap();
         assert_eq!(response.rcode(), RCODE::NameError);
@@ -426,12 +426,8 @@ mod tests {
         let (identity_tx, mut identity_rx) = tokio::sync::mpsc::channel(16);
 
         // Spawn the responder
-        let responder_handle = tokio::spawn(run_dns_responder(
-            server_socket,
-            identity_tx,
-            300,
-            reloader,
-        ));
+        let responder_handle =
+            tokio::spawn(run_dns_responder(server_socket, identity_tx, 300, reloader));
 
         // Send a query
         let client_socket = tokio::net::UdpSocket::bind("127.0.0.1:0").await.unwrap();
@@ -457,13 +453,10 @@ mod tests {
         }
 
         // Verify identity was sent through channel
-        let resolved = tokio::time::timeout(
-            std::time::Duration::from_secs(1),
-            identity_rx.recv(),
-        )
-        .await
-        .unwrap()
-        .unwrap();
+        let resolved = tokio::time::timeout(std::time::Duration::from_secs(1), identity_rx.recv())
+            .await
+            .unwrap()
+            .unwrap();
         assert_eq!(resolved.node_addr, *identity.node_addr());
 
         responder_handle.abort();
@@ -486,12 +479,8 @@ mod tests {
 
         let (identity_tx, mut identity_rx) = tokio::sync::mpsc::channel(16);
 
-        let responder_handle = tokio::spawn(run_dns_responder(
-            server_socket,
-            identity_tx,
-            300,
-            reloader,
-        ));
+        let responder_handle =
+            tokio::spawn(run_dns_responder(server_socket, identity_tx, 300, reloader));
 
         // Query by hostname instead of npub
         let client_socket = tokio::net::UdpSocket::bind("127.0.0.1:0").await.unwrap();
@@ -516,13 +505,10 @@ mod tests {
         }
 
         // Verify identity registration
-        let resolved = tokio::time::timeout(
-            std::time::Duration::from_secs(1),
-            identity_rx.recv(),
-        )
-        .await
-        .unwrap()
-        .unwrap();
+        let resolved = tokio::time::timeout(std::time::Duration::from_secs(1), identity_rx.recv())
+            .await
+            .unwrap()
+            .unwrap();
         assert_eq!(resolved.node_addr, *identity.node_addr());
 
         responder_handle.abort();
@@ -545,12 +531,8 @@ mod tests {
         let server_addr = server_socket.local_addr().unwrap();
         let (identity_tx, _identity_rx) = tokio::sync::mpsc::channel(16);
 
-        let responder_handle = tokio::spawn(run_dns_responder(
-            server_socket,
-            identity_tx,
-            300,
-            reloader,
-        ));
+        let responder_handle =
+            tokio::spawn(run_dns_responder(server_socket, identity_tx, 300, reloader));
 
         let client_socket = tokio::net::UdpSocket::bind("127.0.0.1:0").await.unwrap();
 
@@ -561,16 +543,23 @@ mod tests {
         let (len, _) = tokio::time::timeout(
             std::time::Duration::from_secs(2),
             client_socket.recv_from(&mut buf),
-        ).await.unwrap().unwrap();
+        )
+        .await
+        .unwrap()
+        .unwrap();
         let response = Packet::parse(&buf[..len]).unwrap();
-        assert!(response.answers.is_empty(), "server2 should not resolve before reload");
+        assert!(
+            response.answers.is_empty(),
+            "server2 should not resolve before reload"
+        );
 
         // Update the hosts file to add server2
         std::thread::sleep(std::time::Duration::from_millis(50));
         std::fs::write(
             &hosts_path,
             format!("gateway   {}\nserver2   {}\n", id1.npub(), id2.npub()),
-        ).unwrap();
+        )
+        .unwrap();
 
         // Next query should trigger reload — query server2 again
         let query = build_test_query("server2.fips", TYPE::AAAA);
@@ -578,9 +567,16 @@ mod tests {
         let (len, _) = tokio::time::timeout(
             std::time::Duration::from_secs(2),
             client_socket.recv_from(&mut buf),
-        ).await.unwrap().unwrap();
+        )
+        .await
+        .unwrap()
+        .unwrap();
         let response = Packet::parse(&buf[..len]).unwrap();
-        assert_eq!(response.answers.len(), 1, "server2 should resolve after reload");
+        assert_eq!(
+            response.answers.len(),
+            1,
+            "server2 should resolve after reload"
+        );
         if let RData::AAAA(aaaa) = &response.answers[0].rdata {
             assert_eq!(Ipv6Addr::from(aaaa.address), expected_ipv6_2);
         } else {

src/upper/hosts.rs

@@ -80,7 +80,9 @@ impl HostMap {
 
     /// Look up the npub for a hostname (case-insensitive).
     pub fn lookup_npub(&self, hostname: &str) -> Option<&str> {
-        self.by_name.get(&hostname.to_ascii_lowercase()).map(|s| s.as_str())
+        self.by_name
+            .get(&hostname.to_ascii_lowercase())
+            .map(|s| s.as_str())
     }
 
     /// Look up the hostname for a NodeAddr (reverse lookup for display).
@@ -279,7 +281,9 @@ pub fn validate_hostname(hostname: &str) -> Result<(), HostMapError> {
     }
 
     if hostname.to_ascii_lowercase().starts_with("npub1") {
-        return Err(err("must not start with 'npub1' (ambiguous with npub resolution)"));
+        return Err(err(
+            "must not start with 'npub1' (ambiguous with npub resolution)",
+        ));
     }
 
     if hostname.starts_with('-') {
@@ -338,7 +342,10 @@ mod tests {
             ("NPUB1bar", "npub1 prefix case"),
         ];
         for (h, desc) in cases {
-            assert!(validate_hostname(h).is_err(), "should be invalid ({desc}): {h}");
+            assert!(
+                validate_hostname(h).is_err(),
+                "should be invalid ({desc}): {h}"
+            );
         }
     }
 
@@ -574,10 +581,7 @@ mod tests {
         let mut base = HostMap::new();
         base.insert("core", &id.npub()).unwrap();
 
-        let reloader = HostMapReloader::new(
-            base,
-            std::path::PathBuf::from("/nonexistent/hosts"),
-        );
+        let reloader = HostMapReloader::new(base, std::path::PathBuf::from("/nonexistent/hosts"));
         // Only base entries present
         assert_eq!(reloader.hosts().len(), 1);
         assert!(reloader.hosts().lookup_npub("core").is_some());
@@ -605,7 +609,11 @@ mod tests {
         // Modify the file — bump mtime by writing new content
         // Sleep briefly to ensure mtime changes (filesystem granularity)
         std::thread::sleep(std::time::Duration::from_millis(50));
-        std::fs::write(&path, format!("gateway   {}\nnew-host   {}\n", id1.npub(), id2.npub())).unwrap();
+        std::fs::write(
+            &path,
+            format!("gateway   {}\nnew-host   {}\n", id1.npub(), id2.npub()),
+        )
+        .unwrap();
 
         assert!(reloader.check_reload());
         assert_eq!(reloader.hosts().len(), 2);

src/upper/icmp.rs

@@ -543,7 +543,8 @@ mod tests {
         let short_packet = vec![0u8; 20];
         let our_addr: Ipv6Addr = "fd00::ffff".parse().unwrap();
 
-        let response = build_dest_unreachable(&short_packet, DestUnreachableCode::NoRoute, our_addr);
+        let response =
+            build_dest_unreachable(&short_packet, DestUnreachableCode::NoRoute, our_addr);
         assert!(response.is_none());
     }
 

src/upper/icmp_rate_limit.rs

@@ -68,9 +68,8 @@ impl IcmpRateLimiter {
 
     /// Remove entries older than max_age.
     fn cleanup(&mut self, now: Instant) {
-        self.last_sent.retain(|_, &mut last| {
-            now.duration_since(last) < self.max_age
-        });
+        self.last_sent
+            .retain(|_, &mut last| now.duration_since(last) < self.max_age);
     }
 
     /// Get the number of tracked sources.

src/upper/ipv6_shim.rs

@@ -156,13 +156,17 @@ mod tests {
     }
 
     fn sample_src() -> [u8; 16] {
-        [0xfd, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
-         0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f]
+        [
+            0xfd, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d,
+            0x0e, 0x0f,
+        ]
     }
 
     fn sample_dst() -> [u8; 16] {
-        [0xfd, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
-         0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f]
+        [
+            0xfd, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d,
+            0x1e, 0x1f,
+        ]
     }
 
     // ===== Round-trip fidelity =====
@@ -334,10 +338,14 @@ mod tests {
 
     #[test]
     fn test_addresses_from_context() {
-        let original_src = [0xfd, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA,
-                            0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA];
-        let original_dst = [0xfd, 0xBB, 0xBB, 0xBB, 0xBB, 0xBB, 0xBB, 0xBB,
-                            0xBB, 0xBB, 0xBB, 0xBB, 0xBB, 0xBB, 0xBB, 0xBB];
+        let original_src = [
+            0xfd, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA,
+            0xAA, 0xAA,
+        ];
+        let original_dst = [
+            0xfd, 0xBB, 0xBB, 0xBB, 0xBB, 0xBB, 0xBB, 0xBB, 0xBB, 0xBB, 0xBB, 0xBB, 0xBB, 0xBB,
+            0xBB, 0xBB,
+        ];
         let pkt = build_ipv6_packet(0, 0, 17, 64, original_src, original_dst, &[1, 2]);
 
         let compressed = compress_ipv6(&pkt).unwrap();

src/version.rs

@@ -25,9 +25,8 @@ static SHORT_VERSION: LazyLock<String> = LazyLock::new(|| {
 });
 
 /// Long version string for `--version` with build metadata.
-static LONG_VERSION: LazyLock<String> = LazyLock::new(|| {
-    format!("{}\ntarget: {TARGET}", *SHORT_VERSION)
-});
+static LONG_VERSION: LazyLock<String> =
+    LazyLock::new(|| format!("{}\ntarget: {TARGET}", *SHORT_VERSION));
 
 pub fn short_version() -> &'static str {
     &SHORT_VERSION

testing/ci-local.sh

@@ -157,6 +157,14 @@ run_build() {
         return 1
     fi
 
+    info "cargo fmt --check"
+    if cargo fmt --check 2>&1; then
+        record "fmt" 0
+    else
+        record "fmt" 1
+        return 1
+    fi
+
     info "cargo clippy --all -- -D warnings"
     if cargo clippy --all -- -D warnings 2>&1; then
         record "clippy" 0