sui_core/consensus_manager/

mod.rs

// Copyright (c) Mysten Labs, Inc.
// SPDX-License-Identifier: Apache-2.0
use crate::authority::authority_per_epoch_store::AuthorityPerEpochStore;
use crate::consensus_adapter::{BlockStatusReceiver, ConsensusClient};
use crate::consensus_handler::{ConsensusHandlerInitializer, MysticetiConsensusHandler};
use crate::consensus_transaction_pool::{
    ConsensusTransactionPool, TransactionPoolClient, TransactionPoolContext,
};
use crate::consensus_validator::SuiTxValidator;
use crate::mysticeti_adapter::LazyMysticetiClient;
use arc_swap::ArcSwapOption;
use async_trait::async_trait;
use consensus_config::{
    ChainType, Committee, ConsensusProtocolConfig, NetworkKeyPair,
    NetworkPublicKey as ConsensusNetworkPublicKey, Parameters, ProtocolKeyPair, Stake,
};
use consensus_core::{
    Clock, CommitConsumerArgs, CommitConsumerMonitor, CommitIndex, ConsensusAuthority, NetworkType,
    RandomnessSignatureHandler, TransactionPool, storage::rocksdb_store::RocksDBStore,
};
use core::panic;
use fastcrypto::encoding::{Encoding, Hex};
use fastcrypto::traits::KeyPair as _;
use mysten_common::debug_fatal;
use mysten_metrics::{RegistryID, RegistryService};
use mysten_network::Multiaddr;
use prometheus::{
    IntGauge, IntGaugeVec, Registry, register_int_gauge_vec_with_registry,
    register_int_gauge_with_registry,
};
use std::collections::BTreeMap;
use std::path::PathBuf;
use std::sync::Arc;
use std::time::{Duration, Instant};
use sui_config::{ConsensusConfig, NodeConfig};
use sui_network::endpoint_manager::{AddressSource, ConsensusAddressUpdater};
use sui_protocol_config::{Chain, ProtocolConfig, ProtocolVersion};
use sui_types::crypto::NetworkPublicKey;
use sui_types::error::{SuiErrorKind, SuiResult};
use sui_types::messages_consensus::{ConsensusPosition, ConsensusTransaction};
use sui_types::node_role::NodeRole;
use sui_types::{
    committee::EpochId, sui_system_state::epoch_start_sui_system_state::EpochStartSystemStateTrait,
};
use tokio::sync::{Mutex, broadcast};
use tokio::time::{sleep, timeout};
use tracing::{error, info};

#[cfg(test)]
#[path = "../unit_tests/consensus_manager_tests.rs"]
pub mod consensus_manager_tests;

#[derive(PartialEq)]
enum Running {
    True(EpochId, ProtocolVersion),
    False,
}

/// Stores address updates that should be persisted across epoch changes.
/// We store the consensus NetworkPublicKey to avoid repeated conversions.
struct AddressOverridesMap {
    // We store the AddressSource on a BTreeMap as it helps accessing the keys in priority order.
    map: BTreeMap<
        ConsensusNetworkPublicKey,
        BTreeMap<sui_network::endpoint_manager::AddressSource, Vec<Multiaddr>>,
    >,
}

impl AddressOverridesMap {
    pub fn new() -> Self {
        Self {
            map: BTreeMap::new(),
        }
    }

    pub fn insert(
        &mut self,
        network_pubkey: ConsensusNetworkPublicKey,
        source: sui_network::endpoint_manager::AddressSource,
        addresses: Vec<Multiaddr>,
    ) {
        self.map
            .entry(network_pubkey)
            .or_default()
            .insert(source, addresses);
    }

    pub fn remove(
        &mut self,
        network_pubkey: ConsensusNetworkPublicKey,
        source: sui_network::endpoint_manager::AddressSource,
    ) {
        self.map
            .entry(network_pubkey.clone())
            .or_default()
            .remove(&source);

        // If no sources remain for this peer, remove the peer entry entirely
        if self.map.get(&network_pubkey.clone()).unwrap().is_empty() {
            self.map.remove(&network_pubkey);
        }
    }

    /// Returns the highest-priority active override `(source, address)` for the
    /// peer, or `None` when no override is installed (the on-chain committee
    /// address is in use).
    pub fn get_highest_priority_source_and_address(
        &self,
        network_pubkey: ConsensusNetworkPublicKey,
    ) -> Option<(sui_network::endpoint_manager::AddressSource, Multiaddr)> {
        self.map
            .get(&network_pubkey)
            .and_then(|sources| sources.first_key_value())
            .and_then(|(source, addresses)| {
                addresses.first().cloned().map(|address| (*source, address))
            })
    }

    pub fn get_all_highest_priority_addresses(
        &self,
    ) -> Vec<(ConsensusNetworkPublicKey, Multiaddr)> {
        let mut result = Vec::new();

        for (network_pubkey, sources) in self.map.iter() {
            if let Some((_source, addresses)) = sources.first_key_value()
                && let Some(address) = addresses.first()
            {
                result.push((network_pubkey.clone(), address.clone()));
            }
        }
        result
    }
}

/// Rebuilds the consensus `Committee` with Mysticeti v3 threshold parameters.
/// `malicious_stake` and `crash_stake` come from env vars with reference-budget
/// defaults (`f = c = 1250`); the nominal `threshold_total_stake = 5f + 3c + 1`
/// is derived inside `Committee::new_v3`. This is a temporary iteration knob
/// until the thresholds are promoted into `ProtocolConfig`.
fn apply_v3_threshold_overrides(committee: Committee) -> Committee {
    let malicious_stake: Stake = std::env::var("SUI_CONSENSUS_V3_MALICIOUS_STAKE")
        .ok()
        .and_then(|s| s.parse().ok())
        .unwrap_or(1_250);
    let crash_stake: Stake = std::env::var("SUI_CONSENSUS_V3_CRASH_STAKE")
        .ok()
        .and_then(|s| s.parse().ok())
        .unwrap_or(1_250);
    info!(
        "consensus_manager: applying v3 committee thresholds \
         (malicious_stake={malicious_stake}, crash_stake={crash_stake})"
    );
    Committee::new_v3(
        committee.epoch(),
        committee.authorities_slice().to_vec(),
        malicious_stake,
        crash_stake,
    )
}

fn to_consensus_protocol_config(config: &ProtocolConfig) -> ConsensusProtocolConfig {
    let chain_type = match config.chain() {
        Chain::Mainnet => ChainType::Mainnet,
        Chain::Testnet => ChainType::Testnet,
        Chain::Unknown => ChainType::Unknown,
    };
    ConsensusProtocolConfig::new(
        config.version.as_u64(),
        chain_type,
        config.max_transaction_size_bytes(),
        config.max_transactions_in_block_bytes(),
        config.max_num_transactions_in_block(),
        config.gc_depth(),
        config.consensus_slim_block_propagation(),
        /* transaction_voting_enabled */ true,
        config.mysticeti_num_leaders_per_round(),
        config.consensus_bad_nodes_stake_threshold(),
        /* enable_v3 */ false,
        /* leader_schedule_window_size */ 300,
        /* leader_schedule_update_interval */ 12,
    )
}

/// Used by Sui to start consensus protocol for each epoch.
/// Supports both validator mode (with protocol keypair) and observer mode (without).
pub struct ConsensusManager {
    consensus_config: ConsensusConfig,
    protocol_keypair: Option<ProtocolKeyPair>,
    network_keypair: NetworkKeyPair,
    storage_base_path: PathBuf,
    metrics: Arc<ConsensusManagerMetrics>,
    registry_service: RegistryService,
    authority: ArcSwapOption<(ConsensusAuthority, RegistryID)>,

    // Use a shared lazy Mysticeti client so we can update the internal Mysticeti
    // client that gets created for every new epoch.
    client: Arc<LazyMysticetiClient>,
    consensus_client: Arc<UpdatableConsensusClient>,
    transaction_pool_context: Option<Arc<TransactionPoolContext>>,
    transaction_pool: ArcSwapOption<ConsensusTransactionPool>,

    consensus_handler: Mutex<Option<MysticetiConsensusHandler>>,

    #[cfg(test)]
    pub(crate) consumer_monitor: ArcSwapOption<CommitConsumerMonitor>,
    #[cfg(not(test))]
    consumer_monitor: ArcSwapOption<CommitConsumerMonitor>,
    consumer_monitor_sender: broadcast::Sender<Arc<CommitConsumerMonitor>>,

    running: Mutex<Running>,

    #[cfg(test)]
    pub(crate) boot_counter: Mutex<u64>,
    #[cfg(not(test))]
    boot_counter: Mutex<u64>,

    // Persistent storage for address updates across epoch changes.
    // Keyed by NetworkPublicKey and then by AddressSource.
    address_overrides: parking_lot::Mutex<AddressOverridesMap>,
}

impl ConsensusManager {
    pub fn new(
        node_config: &NodeConfig,
        consensus_config: &ConsensusConfig,
        registry_service: &RegistryService,
        consensus_client: Arc<UpdatableConsensusClient>,
        transaction_pool_context: Option<Arc<TransactionPoolContext>>,
        node_role: NodeRole,
    ) -> Self {
        let metrics = Arc::new(ConsensusManagerMetrics::new(
            &registry_service.default_registry(),
        ));
        let client = Arc::new(LazyMysticetiClient::new());
        let (consumer_monitor_sender, _) = broadcast::channel(1);
        let protocol_keypair = if node_role.is_validator() {
            Some(ProtocolKeyPair::new(node_config.worker_key_pair().copy()))
        } else {
            None
        };
        Self {
            consensus_config: consensus_config.clone(),
            protocol_keypair,
            network_keypair: NetworkKeyPair::new(node_config.network_key_pair().copy()),
            storage_base_path: consensus_config.db_path().to_path_buf(),
            metrics,
            registry_service: registry_service.clone(),
            authority: ArcSwapOption::empty(),
            client,
            consensus_client,
            transaction_pool_context,
            transaction_pool: ArcSwapOption::empty(),
            consensus_handler: Mutex::new(None),
            consumer_monitor: ArcSwapOption::empty(),
            consumer_monitor_sender,
            running: Mutex::new(Running::False),
            boot_counter: Mutex::new(0),
            address_overrides: parking_lot::Mutex::new(AddressOverridesMap::new()),
        }
    }

    pub async fn start(
        &self,
        node_config: &NodeConfig,
        epoch_store: Arc<AuthorityPerEpochStore>,
        consensus_handler_initializer: ConsensusHandlerInitializer,
        tx_validator: SuiTxValidator,
        randomness_signature_handler: Option<Arc<dyn RandomnessSignatureHandler>>,
    ) {
        let epoch = epoch_store.epoch();
        let protocol_config = epoch_store.protocol_config();
        let consensus_protocol_config = to_consensus_protocol_config(protocol_config);
        let system_state = epoch_store.epoch_start_state();
        let committee = if consensus_protocol_config.enable_v3() {
            apply_v3_threshold_overrides(system_state.get_consensus_committee())
        } else {
            system_state.get_consensus_committee()
        };

        // Ensure start() is not called twice.
        let start_time = Instant::now();
        let mut running = self.running.lock().await;
        if let Running::True(running_epoch, running_version) = *running {
            error!(
                "Consensus is already Running for epoch {running_epoch:?} & protocol version {running_version:?} - shutdown first before starting",
            );
            return;
        }
        *running = Running::True(epoch, protocol_config.version);

        info!(
            "Starting up consensus for epoch {epoch:?} & protocol version {:?}",
            protocol_config.version
        );

        let is_validator = epoch_store.is_validator();
        if is_validator && self.protocol_keypair.is_none() {
            // The manager was built for a non-validator role and reused across a
            // promotion to validator; consensus cannot sign proposals in this state.
            debug_fatal!("validator epoch {epoch} started without a protocol keypair");
        }
        let pool_context = self
            .transaction_pool_context
            .as_ref()
            .filter(|_| is_validator);
        let transaction_pool: Option<Arc<dyn TransactionPool>> = if let Some(context) = pool_context
        {
            let config = node_config
                .consensus_transaction_pool
                .as_ref()
                .expect("transaction pool context requires pool config");
            let pool = Arc::new(ConsensusTransactionPool::new(
                epoch_store.clone(),
                config.max_pending_transactions(&self.consensus_config),
                context.metrics().clone(),
                context.adapter_metrics().clone(),
            ));
            context.set_active(epoch, pool.clone());
            self.transaction_pool.store(Some(pool.clone()));
            self.consensus_client
                .set(Arc::new(TransactionPoolClient::new(context.clone())));
            Some(pool)
        } else {
            if let Some(context) = &self.transaction_pool_context {
                context.set_unavailable(epoch);
            }
            self.consensus_client.set(self.client.clone());
            None
        };

        let consensus_config = node_config
            .consensus_config()
            .expect("consensus_config should exist");

        let parameters = Parameters {
            db_path: self.get_store_path(epoch),
            listen_address_override: consensus_config.listen_address.clone(),
            ..consensus_config.parameters.clone().unwrap_or_default()
        };

        let registry = Registry::new_custom(Some("consensus".to_string()), None).unwrap();

        let consensus_handler = consensus_handler_initializer.new_consensus_handler();

        let num_prior_commits = protocol_config.consensus_num_requested_prior_commits_at_startup();
        let last_processed_commit_index =
            consensus_handler.last_processed_subdag_index() as CommitIndex;
        let replay_after_commit_index =
            last_processed_commit_index.saturating_sub(num_prior_commits);

        let (commit_consumer, commit_receiver) =
            CommitConsumerArgs::new(replay_after_commit_index, last_processed_commit_index);
        let monitor = commit_consumer.monitor();

        // Spin up the new Mysticeti consensus handler to listen for committed sub dags, before starting authority.
        let handler = MysticetiConsensusHandler::new(
            last_processed_commit_index,
            consensus_handler,
            commit_receiver,
            monitor.clone(),
        );
        let mut consensus_handler = self.consensus_handler.lock().await;
        *consensus_handler = Some(handler);

        // If there is a previous consumer monitor, it indicates that the consensus engine has been restarted, due to an epoch change. However, that on its
        // own doesn't tell us much whether it participated on an active epoch or an old one. We need to check if it has handled any commits to determine this.
        // If indeed any commits did happen, then we assume that node did participate on previous run.
        let participated_on_previous_run =
            if let Some(previous_monitor) = self.consumer_monitor.swap(Some(monitor.clone())) {
                previous_monitor.highest_handled_commit() > 0
            } else {
                false
            };

        // Increment the boot counter only if the consensus successfully participated in the previous run.
        // This is typical during normal epoch changes, where the node restarts as expected, and the boot counter is incremented to prevent amnesia recovery on the next start.
        // If the node is recovering from a restore process and catching up across multiple epochs, it won't handle any commits until it reaches the last active epoch.
        // In this scenario, we do not increment the boot counter, as we need amnesia recovery to run.
        let mut boot_counter = self.boot_counter.lock().await;
        if participated_on_previous_run {
            *boot_counter += 1;
        } else {
            info!(
                "Node has not participated in previous epoch consensus. Boot counter ({}) will not increment.",
                *boot_counter
            );
        }

        let authority = ConsensusAuthority::start(
            NetworkType::Tonic,
            epoch_store.epoch_start_config().epoch_start_timestamp_ms(),
            committee.clone(),
            parameters.clone(),
            consensus_protocol_config,
            self.protocol_keypair.clone(),
            self.network_keypair.clone(),
            Arc::new(Clock::default()),
            Arc::new(tx_validator.clone()),
            transaction_pool,
            commit_consumer,
            registry.clone(),
            *boot_counter,
            randomness_signature_handler,
        )
        .await;
        let client = pool_context
            .is_none()
            .then(|| authority.transaction_client());

        let registry_id = self.registry_service.add(registry.clone());

        let registered_authority = Arc::new((authority, registry_id));
        self.authority.swap(Some(registered_authority.clone()));

        // Reapply all stored address updates to the new consensus instance.
        let highest_priority_addresses = self
            .address_overrides
            .lock()
            .get_all_highest_priority_addresses();
        for (network_pubkey, address) in highest_priority_addresses {
            registered_authority
                .0
                .update_peer_address(network_pubkey, Some(address.clone()));
        }

        // Initialize the client to send transactions to this Mysticeti instance.
        if let Some(client) = client {
            self.client.set(client);
        }

        // Send the consumer monitor to the replay waiter.
        let _ = self.consumer_monitor_sender.send(monitor);

        let elapsed = start_time.elapsed().as_secs_f64();
        self.metrics.start_latency.set(elapsed as i64);

        tracing::info!(
            "Started consensus for epoch {} & protocol version {:?} completed - took {} seconds",
            epoch,
            protocol_config.version,
            elapsed
        );
    }

    pub async fn shutdown(&self) {
        info!("Shutting down consensus ...");

        // Ensure shutdown() is called on a running consensus and get the epoch/version info.
        let start_time = Instant::now();
        let mut running = self.running.lock().await;
        let (shutdown_epoch, shutdown_version) = match *running {
            Running::True(epoch, version) => {
                tracing::info!(
                    "Shutting down consensus for epoch {epoch:?} & protocol version {version:?}"
                );
                *running = Running::False;
                (epoch, version)
            }
            Running::False => {
                error!("Consensus shutdown was called but consensus is not running");
                return;
            }
        };

        // Stop consensus submissions.
        let pool = self.transaction_pool.swap(None);
        if let Some(pool) = &pool {
            pool.close();
        }
        self.client.clear();

        // swap with empty to ensure there is no other reference to authority and we can safely do Arc unwrap
        let r = self.authority.swap(None).unwrap();
        let Ok((authority, registry_id)) = Arc::try_unwrap(r) else {
            panic!("Failed to retrieve the Mysticeti authority");
        };

        // shutdown the authority and wait for it
        authority.stop().await;

        // drop the old consensus handler to force stop any underlying task running.
        let mut consensus_handler = self.consensus_handler.lock().await;
        if let Some(mut handler) = consensus_handler.take() {
            handler.abort().await;
        }

        // unregister the registry id
        self.registry_service.remove(registry_id);

        if pool.is_none() {
            self.consensus_client.clear();
        }

        let elapsed = start_time.elapsed().as_secs_f64();
        self.metrics.shutdown_latency.set(elapsed as i64);

        tracing::info!(
            "Consensus stopped for epoch {shutdown_epoch:?} & protocol version {shutdown_version:?} is complete - took {} seconds",
            elapsed
        );
    }

    pub async fn is_running(&self) -> bool {
        let running = self.running.lock().await;
        matches!(*running, Running::True(_, _))
    }

    pub fn replay_waiter(&self) -> ReplayWaiter {
        let consumer_monitor_receiver = self.consumer_monitor_sender.subscribe();
        ReplayWaiter::new(consumer_monitor_receiver)
    }

    pub fn get_storage_base_path(&self) -> PathBuf {
        self.consensus_config.db_path().to_path_buf()
    }

    pub fn consensus_store(&self) -> Option<Arc<RocksDBStore>> {
        self.authority.load().as_ref().map(|a| a.0.store())
    }

    pub fn address_overrides_snapshot(
        &self,
    ) -> BTreeMap<
        ConsensusNetworkPublicKey,
        BTreeMap<sui_network::endpoint_manager::AddressSource, Vec<Multiaddr>>,
    > {
        self.address_overrides.lock().map.clone()
    }

    fn get_store_path(&self, epoch: EpochId) -> PathBuf {
        let mut store_path = self.storage_base_path.clone();
        store_path.push(format!("{}", epoch));
        store_path
    }
}

impl Drop for ConsensusManager {
    fn drop(&mut self) {
        // Abrupt node teardown can bypass async shutdown; explicitly disarm any
        // pending pool acknowledgements before the manager's fields are dropped.
        if let Some(pool) = self.transaction_pool.swap(None) {
            pool.close();
        }
    }
}

// Implementing the interface so we can update the consensus peer addresses when requested.
impl ConsensusAddressUpdater for ConsensusManager {
    fn update_address(
        &self,
        network_pubkey: NetworkPublicKey,
        source: sui_network::endpoint_manager::AddressSource,
        addresses: Vec<Multiaddr>,
    ) -> SuiResult<()> {
        // Convert to consensus network public key once
        let network_pubkey = ConsensusNetworkPublicKey::new(network_pubkey.clone());

        // Determine which override (if any) should be used after this update.
        let highest_priority = {
            let mut address_overrides = self.address_overrides.lock();

            if addresses.is_empty() {
                address_overrides.remove(network_pubkey.clone(), source);
            } else {
                address_overrides.insert(network_pubkey.clone(), source, addresses.clone());
            }

            address_overrides.get_highest_priority_source_and_address(network_pubkey.clone())
        };
        self.metrics.set_active_address_source(
            &Hex::encode(network_pubkey.to_bytes()),
            highest_priority.as_ref().map(|(source, _)| *source),
        );

        // Apply the update to running consensus if it exists
        let address_to_apply = highest_priority.map(|(_, address)| address);
        if let Some(authority) = self.authority.load_full() {
            authority
                .0
                .update_peer_address(network_pubkey, address_to_apply);
            Ok(())
        } else {
            info!(
                "Consensus authority node is not running, address update persisted for peer {:?} from source {:?} and will be applied on next start",
                network_pubkey, source
            );
            Err(SuiErrorKind::GenericAuthorityError {
                error: "Consensus authority node is not running. Can not apply address update"
                    .to_string(),
            }
            .into())
        }
    }
}

/// A ConsensusClient that can be updated internally at any time. This usually happening during epoch
/// change where a client is set after the new consensus is started for the new epoch.
#[derive(Default)]
pub struct UpdatableConsensusClient {
    // An extra layer of Arc<> is needed as required by ArcSwapAny.
    client: ArcSwapOption<Arc<dyn ConsensusClient>>,
}

impl UpdatableConsensusClient {
    pub fn new() -> Self {
        Self {
            client: ArcSwapOption::empty(),
        }
    }

    async fn get(&self) -> Arc<Arc<dyn ConsensusClient>> {
        const START_TIMEOUT: Duration = Duration::from_secs(300);
        const RETRY_INTERVAL: Duration = Duration::from_millis(100);
        if let Ok(client) = timeout(START_TIMEOUT, async {
            loop {
                let Some(client) = self.client.load_full() else {
                    sleep(RETRY_INTERVAL).await;
                    continue;
                };
                return client;
            }
        })
        .await
        {
            return client;
        }

        panic!(
            "Timed out after {:?} waiting for Consensus to start!",
            START_TIMEOUT,
        );
    }

    pub fn set(&self, client: Arc<dyn ConsensusClient>) {
        self.client.store(Some(Arc::new(client)));
    }

    pub fn clear(&self) {
        self.client.store(None);
    }
}

#[async_trait]
impl ConsensusClient for UpdatableConsensusClient {
    async fn submit(
        &self,
        transactions: &[ConsensusTransaction],
        epoch_store: &Arc<AuthorityPerEpochStore>,
    ) -> SuiResult<(Vec<ConsensusPosition>, BlockStatusReceiver)> {
        let client = self.get().await;
        client.submit(transactions, epoch_store).await
    }
}

/// Waits for consensus to finish replaying at consensus handler.
pub struct ReplayWaiter {
    consumer_monitor_receiver: broadcast::Receiver<Arc<CommitConsumerMonitor>>,
}

impl ReplayWaiter {
    pub(crate) fn new(
        consumer_monitor_receiver: broadcast::Receiver<Arc<CommitConsumerMonitor>>,
    ) -> Self {
        Self {
            consumer_monitor_receiver,
        }
    }

    pub(crate) async fn wait_for_replay(mut self) {
        loop {
            info!("Waiting for consensus to start replaying ...");
            let Ok(monitor) = self.consumer_monitor_receiver.recv().await else {
                continue;
            };
            info!("Waiting for consensus handler to finish replaying ...");
            monitor
                .replay_to_consumer_last_processed_commit_complete()
                .await;
            break;
        }
    }
}

impl Clone for ReplayWaiter {
    fn clone(&self) -> Self {
        Self {
            consumer_monitor_receiver: self.consumer_monitor_receiver.resubscribe(),
        }
    }
}

pub struct ConsensusManagerMetrics {
    start_latency: IntGauge,
    shutdown_latency: IntGauge,
    active_address_source: IntGaugeVec,
}

impl ConsensusManagerMetrics {
    pub fn new(registry: &Registry) -> Self {
        Self {
            start_latency: register_int_gauge_with_registry!(
                "consensus_manager_start_latency",
                "The latency of starting up consensus nodes",
                registry,
            )
            .unwrap(),
            shutdown_latency: register_int_gauge_with_registry!(
                "consensus_manager_shutdown_latency",
                "The latency of shutting down consensus nodes",
                registry,
            )
            .unwrap(),
            active_address_source: register_int_gauge_vec_with_registry!(
                "consensus_active_address_source",
                "Active consensus address source per committee peer, encoded as the gauge \
                 value: 0=committee (no override active; the on-chain committee address is in \
                 use), 1=admin, 2=config, 3=discovery, 4=seed, 5=chain (override priority \
                 highest to lowest). One series per peer; `peer_id` is the full hex consensus \
                 network public key.",
                &["peer_id"],
                registry,
            )
            .unwrap(),
        }
    }

    /// Records the active consensus address source for a committee peer as a single
    /// per-peer gauge whose value is the source's `metric_code`. `active =
    /// Some(source)` means an override is installed; `None` means no override.
    fn set_active_address_source(
        &self,
        peer_id: &str,
        active: Option<sui_network::endpoint_manager::AddressSource>,
    ) {
        let code = active.map_or(
            AddressSource::DEFAULT_ADDRESS_SOURCE_CODE,
            sui_network::endpoint_manager::AddressSource::metric_code,
        );
        self.active_address_source
            .with_label_values(&[peer_id])
            .set(code);
    }
}