feat: network monitor transport layer integration

CHANGELOG.md

@@ -3,6 +3,7 @@
 ## v0.13.5 (TBD)
 
 - OpenTelemetry traces are now flushed before program termination on panic ([#1643](https://github.com/0xMiden/miden-node/pull/1643)).
+- Added support for the note transport layer in the network monitor ([#1660](https://github.com/0xMiden/miden-node/pull/1660)).
 
 ## v0.13.4 (2026-02-04)
 

Cargo.toml

@@ -87,6 +87,7 @@ tokio              = { features = ["rt-multi-thread"], version = "1.46" }
 tokio-stream       = { version = "0.1" }
 toml               = { version = "0.9" }
 tonic              = { default-features = false, version = "0.14" }
+tonic-health       = { version = "0.14" }
 tonic-prost        = { version = "0.14" }
 tonic-prost-build  = { version = "0.14" }
 tonic-reflection   = { version = "0.14" }

bin/network-monitor/.env

@@ -20,3 +20,5 @@ MIDEN_MONITOR_COUNTER_INCREMENT_INTERVAL=30s
 MIDEN_MONITOR_COUNTER_LATENCY_TIMEOUT=2m
 # explorer checks
 MIDEN_MONITOR_EXPLORER_URL=https://scan-backend-devnet-miden.eu-central-8.gateway.fm/graphql
+# note transport checks
+MIDEN_MONITOR_NOTE_TRANSPORT_URL=https://transport.miden.io

bin/network-monitor/Cargo.toml

@@ -34,5 +34,6 @@ serde_json       = { version = "1.0" }
 sha2             = { version = "0.10" }
 tokio            = { features = ["full"], workspace = true }
 tonic            = { features = ["codegen", "tls-native-roots", "transport"], workspace = true }
+tonic-health     = { workspace = true }
 tracing          = { workspace = true }
 url              = { features = ["serde"], workspace = true }

bin/network-monitor/README.md

@@ -31,6 +31,7 @@ miden-network-monitor start --faucet-url http://localhost:8080 --enable-otel
 - `--remote-prover-urls`: Comma-separated list of remote prover URLs. If omitted or empty, prover tasks are disabled.
 - `--faucet-url`: Faucet service URL for testing. If omitted, faucet testing is disabled.
 - `--explorer-url`: Explorer service GraphQL endpoint. If omitted, explorer checks are disabled.
+- `--note-transport-url`: Note transport service URL for health checking. If omitted, note transport checks are disabled.
 - `--disable-ntx-service`: Disable the network transaction service checks (enabled by default). The network transaction service consists of two components: counter increment (sending increment transactions) and counter tracking (monitoring counter value changes).
 - `--remote-prover-test-interval`: Interval at which to test the remote provers services (default: `2m`)
 - `--faucet-test-interval`: Interval at which to test the faucet services (default: `2m`)
@@ -54,6 +55,7 @@ If command-line arguments are not provided, the application falls back to enviro
 - `MIDEN_MONITOR_REMOTE_PROVER_URLS`: Comma-separated list of remote prover URLs. If unset or empty, prover tasks are disabled.
 - `MIDEN_MONITOR_FAUCET_URL`: Faucet service URL for testing. If unset, faucet testing is disabled.
 - `MIDEN_MONITOR_EXPLORER_URL`: Explorer service GraphQL endpoint. If unset, explorer checks are disabled.
+- `MIDEN_MONITOR_NOTE_TRANSPORT_URL`: Note transport service URL for health checking. If unset, note transport checks are disabled.
 - `MIDEN_MONITOR_DISABLE_NTX_SERVICE`: Set to `true` to disable the network transaction service checks (enabled by default). This affects both counter increment and tracking components.
 - `MIDEN_MONITOR_REMOTE_PROVER_TEST_INTERVAL`: Interval at which to test the remote provers services
 - `MIDEN_MONITOR_FAUCET_TEST_INTERVAL`: Interval at which to test the faucet services
@@ -78,6 +80,7 @@ Starts the network monitoring service with the web dashboard. RPC status is alwa
 - Prover checks/tests: enabled when `--remote-prover-urls` (or `MIDEN_MONITOR_REMOTE_PROVER_URLS`) is provided
 - Faucet testing: enabled when `--faucet-url` (or `MIDEN_MONITOR_FAUCET_URL`) is provided
 - Network transaction service: enabled when `--disable-ntx-service=false` or unset (or `MIDEN_MONITOR_DISABLE_NTX_SERVICE=false` or unset)
+- Note transport checks: enabled when `--note-transport-url` (or `MIDEN_MONITOR_NOTE_TRANSPORT_URL`) is provided
 
 ```bash
 # Start with default configuration (RPC only)
@@ -205,6 +208,12 @@ The monitor application provides real-time status monitoring for the following M
   - Pending notes: How many transactions are queued/unprocessed
   - Last updated timestamp
 
+### Note Transport
+- **Service Health**: Checks the note transport service via the standard gRPC Health Checking Protocol
+- **Metrics**:
+  - Service URL
+  - gRPC serving status (Serving, NotServing, Unknown)
+
 ## User Interface
 
 The web dashboard provides a clean, responsive interface with the following features:

bin/network-monitor/assets/index.js

@@ -411,6 +411,9 @@ function updateDisplay() {
             detailsHtml = `
                 <div class="service-details">
                     ${details.RpcStatus ? `
+                        ${details.RpcStatus.url ? `
+                            <div class="detail-item"><strong>URL:</strong> ${details.RpcStatus.url}${renderCopyButton(details.RpcStatus.url, 'URL')}</div>
+                        ` : ''}
                         <div class="detail-item"><strong>Version:</strong> ${details.RpcStatus.version}</div>
                         ${details.RpcStatus.genesis_commitment ? `
                             <div class="detail-item">
@@ -472,7 +475,7 @@ function updateDisplay() {
                     ` : ''}
                     ${details.RemoteProverStatus ? `
                         <div class="nested-status">
-                            <strong>Prover Status (${details.RemoteProverStatus.url}):</strong>
+                            <strong>Prover Status (${details.RemoteProverStatus.url}):</strong>${renderCopyButton(details.RemoteProverStatus.url, 'URL')}
                             <div class="detail-item"><strong>Version:</strong> ${details.RemoteProverStatus.version}</div>
                             <div class="nested-status">
                                 <strong>Supported Proof Type:</strong> ${details.RemoteProverStatus.supported_proof_type}
@@ -496,6 +499,10 @@ function updateDisplay() {
                         <div class="nested-status">
                             <strong>Faucet:</strong>
                             <div class="test-metrics ${service.status === 'Healthy' ? 'healthy' : 'unhealthy'}">
+                                <div class="metric-row">
+                                    <span class="metric-label">URL:</span>
+                                    <span class="metric-value">${details.FaucetTest.url}${renderCopyButton(details.FaucetTest.url, 'URL')}</span>
+                                </div>
                                 <div class="metric-row">
                                     <span class="metric-label">Success Rate:</span>
                                     <span class="metric-value">${formatSuccessRate(details.FaucetTest.success_count, details.FaucetTest.failure_count)}</span>
@@ -616,6 +623,21 @@ function updateDisplay() {
                             </div>
                         </div>
                     ` : ''}
+                    ${details.NoteTransportStatus ? `
+                        <div class="nested-status">
+                            <strong>Note Transport:</strong>
+                            <div class="test-metrics ${service.status === 'Healthy' ? 'healthy' : 'unhealthy'}">
+                                <div class="metric-row">
+                                    <span class="metric-label">URL:</span>
+                                    <span class="metric-value">${details.NoteTransportStatus.url}${renderCopyButton(details.NoteTransportStatus.url, 'URL')}</span>
+                                </div>
+                                <div class="metric-row">
+                                    <span class="metric-label">Serving Status:</span>
+                                    <span class="metric-value">${details.NoteTransportStatus.serving_status}</span>
+                                </div>
+                            </div>
+                        </div>
+                    ` : ''}
                     ${service.testDetails ? `
                         <div class="nested-status">
                             <strong>Proof Generation Testing (${service.testDetails.proof_type}):</strong>

bin/network-monitor/src/commands/start.rs

@@ -48,6 +48,13 @@ pub async fn start_monitor(config: MonitorConfig) -> Result<()> {
         None
     };
 
+    // Initialize the note transport status checker task.
+    let note_transport_rx = if config.note_transport_url.is_some() {
+        Some(tasks.spawn_note_transport_checker(&config).await?)
+    } else {
+        None
+    };
+
     // Initialize the prover checkers & tests tasks, only if URLs were provided.
     let prover_rxs = if config.remote_prover_urls.is_empty() {
         debug!(target: COMPONENT, "No remote prover URLs configured, skipping prover tasks");
@@ -85,6 +92,7 @@ pub async fn start_monitor(config: MonitorConfig) -> Result<()> {
         ntx_increment: ntx_increment_rx,
         ntx_tracking: ntx_tracking_rx,
         explorer: explorer_rx,
+        note_transport: note_transport_rx,
     };
     tasks.spawn_http_server(server_state, &config);
 

bin/network-monitor/src/config.rs

@@ -166,6 +166,14 @@ pub struct MonitorConfig {
     )]
     pub explorer_url: Option<Url>,
 
+    /// The URL of the note transport service.
+    #[arg(
+        long = "note-transport-url",
+        env = "MIDEN_MONITOR_NOTE_TRANSPORT_URL",
+        help = "The URL of the note transport service"
+    )]
+    pub note_transport_url: Option<Url>,
+
     /// Maximum time without a chain tip update before marking RPC as unhealthy.
     ///
     /// If the chain tip does not increment within this duration, the RPC service will be

bin/network-monitor/src/faucet.rs

@@ -34,6 +34,7 @@ const MINT_AMOUNT: u64 = 1_000_000; // 1 token with 6 decimals
 /// Details of a faucet test.
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct FaucetTestDetails {
+    pub url: String,
     pub test_duration_ms: u64,
     pub success_count: u64,
     pub failure_count: u64,
@@ -129,6 +130,7 @@ pub async fn run_faucet_test_task(
         let test_duration_ms = start_time.elapsed().as_millis() as u64;
 
         let test_details = FaucetTestDetails {
+            url: faucet_url.to_string(),
             test_duration_ms,
             success_count,
             failure_count,

bin/network-monitor/src/frontend.rs

@@ -26,6 +26,7 @@ pub struct ServerState {
     pub ntx_increment: Option<watch::Receiver<ServiceStatus>>,
     pub ntx_tracking: Option<watch::Receiver<ServiceStatus>>,
     pub explorer: Option<watch::Receiver<ServiceStatus>>,
+    pub note_transport: Option<watch::Receiver<ServiceStatus>>,
 }
 
 /// Runs the frontend server.
@@ -77,9 +78,9 @@ async fn get_status(
     // Collect RPC status
     services.push(server_state.rpc.borrow().clone());
 
-    // Collect explorer status if available
-    if let Some(explorer_rx) = &server_state.explorer {
-        services.push(explorer_rx.borrow().clone());
+    // Collect faucet status if available
+    if let Some(faucet_rx) = &server_state.faucet {
+        services.push(faucet_rx.borrow().clone());
     }
 
     // Collect all remote prover statuses
@@ -88,9 +89,9 @@ async fn get_status(
         services.push(prover_test_rx.borrow().clone());
     }
 
-    // Collect faucet status if available
-    if let Some(faucet_rx) = &server_state.faucet {
-        services.push(faucet_rx.borrow().clone());
+    // Collect explorer status if available
+    if let Some(explorer_rx) = &server_state.explorer {
+        services.push(explorer_rx.borrow().clone());
     }
 
     // Collect counter increment status if enabled
@@ -103,6 +104,11 @@ async fn get_status(
         services.push(ntx_tracking_rx.borrow().clone());
     }
 
+    // Collect note transport status if available
+    if let Some(note_transport_rx) = &server_state.note_transport {
+        services.push(note_transport_rx.borrow().clone());
+    }
+
     let network_status = NetworkStatus { services, last_updated: current_time };
 
     axum::response::Json(network_status)

bin/network-monitor/src/main.rs

@@ -16,6 +16,7 @@ pub mod explorer;
 pub mod faucet;
 pub mod frontend;
 mod monitor;
+pub mod note_transport;
 pub mod remote_prover;
 pub mod status;
 

bin/network-monitor/src/monitor/tasks.rs

@@ -23,6 +23,7 @@ use crate::deploy::ensure_accounts_exist;
 use crate::explorer::{initial_explorer_status, run_explorer_status_task};
 use crate::faucet::run_faucet_test_task;
 use crate::frontend::{ServerState, serve};
+use crate::note_transport::{initial_note_transport_status, run_note_transport_status_task};
 use crate::remote_prover::{ProofType, generate_prover_test_payload, run_remote_prover_test_task};
 use crate::status::{
     ServiceStatus,
@@ -142,6 +143,39 @@ impl Tasks {
         Ok(explorer_status_rx)
     }
 
+    /// Spawn the note transport status checker task.
+    #[instrument(target = COMPONENT, name = "tasks.spawn-note-transport-checker", skip_all)]
+    pub async fn spawn_note_transport_checker(
+        &mut self,
+        config: &MonitorConfig,
+    ) -> Result<Receiver<ServiceStatus>> {
+        let note_transport_url =
+            config.note_transport_url.clone().expect("Note transport URL exists");
+        let name = "Note Transport".to_string();
+        let status_check_interval = config.status_check_interval;
+        let request_timeout = config.request_timeout;
+        let (tx, rx) = watch::channel(initial_note_transport_status());
+
+        let id = self
+            .handles
+            .spawn(async move {
+                run_note_transport_status_task(
+                    note_transport_url,
+                    name,
+                    tx,
+                    status_check_interval,
+                    request_timeout,
+                )
+                .await;
+            })
+            .id();
+        self.names.insert(id, "note-transport-checker".to_string());
+
+        println!("Spawned note transport status checker task");
+
+        Ok(rx)
+    }
+
     /// Spawn prover status and test tasks for all configured provers.
     #[instrument(
         parent = None,
@@ -287,6 +321,7 @@ impl Tasks {
             last_checked: current_time,
             error: None,
             details: crate::status::ServiceDetails::FaucetTest(crate::faucet::FaucetTestDetails {
+                url: config.faucet_url.as_ref().expect("faucet URL exists").to_string(),
                 test_duration_ms: 0,
                 success_count: 0,
                 failure_count: 0,