diff --git a/example-raft-kv/src/client.rs b/example-raft-kv/src/client.rs
index 3c04df610..54e1085a2 100644
--- a/example-raft-kv/src/client.rs
+++ b/example-raft-kv/src/client.rs
@@ -114,7 +114,7 @@ impl ExampleClient {
     /// Metrics contains various information about the cluster, such as current leader,
     /// membership config, replication status etc.
     /// See [`RaftMetrics`].
-    pub async fn metrics(&self) -> Result<RaftMetrics<ExampleTypeConfig>, RPCError<ExampleNodeId, Infallible>> {
+    pub async fn metrics(&self) -> Result<RaftMetrics<ExampleNodeId>, RPCError<ExampleNodeId, Infallible>> {
         self.do_send_rpc_to_leader("metrics", None::<&()>).await
     }
 
diff --git a/example-raft-kv/src/network/management.rs b/example-raft-kv/src/network/management.rs
index 7002ffa52..bdb2f7c44 100644
--- a/example-raft-kv/src/network/management.rs
+++ b/example-raft-kv/src/network/management.rs
@@ -13,7 +13,6 @@ use web::Json;
 
 use crate::app::ExampleApp;
 use crate::ExampleNodeId;
-use crate::ExampleTypeConfig;
 
 // --- Cluster management
 
@@ -63,6 +62,6 @@ pub async fn init(app: Data<ExampleApp>) -> actix_web::Result<impl Responder> {
 pub async fn metrics(app: Data<ExampleApp>) -> actix_web::Result<impl Responder> {
     let metrics = app.raft.metrics().borrow().clone();
 
-    let res: Result<RaftMetrics<ExampleTypeConfig>, Infallible> = Ok(metrics);
+    let res: Result<RaftMetrics<ExampleNodeId>, Infallible> = Ok(metrics);
     Ok(Json(res))
 }
diff --git a/openraft/src/core/raft_core.rs b/openraft/src/core/raft_core.rs
index d50aaffe2..572c48cb9 100644
--- a/openraft/src/core/raft_core.rs
+++ b/openraft/src/core/raft_core.rs
@@ -106,7 +106,7 @@ pub struct RaftCore<C: RaftTypeConfig, N: RaftNetworkFactory<C>, S: RaftStorage<
     pub(crate) tx_api: mpsc::UnboundedSender<(RaftMsg<C, N, S>, Span)>,
     pub(crate) rx_api: mpsc::UnboundedReceiver<(RaftMsg<C, N, S>, Span)>,
 
-    tx_metrics: watch::Sender<RaftMetrics<C>>,
+    tx_metrics: watch::Sender<RaftMetrics<C::NodeId>>,
 
     pub(crate) rx_shutdown: oneshot::Receiver<()>,
 }
@@ -119,7 +119,7 @@ impl<C: RaftTypeConfig, N: RaftNetworkFactory<C>, S: RaftStorage<C>> RaftCore<C,
         storage: S,
         tx_api: mpsc::UnboundedSender<(RaftMsg<C, N, S>, Span)>,
         rx_api: mpsc::UnboundedReceiver<(RaftMsg<C, N, S>, Span)>,
-        tx_metrics: watch::Sender<RaftMetrics<C>>,
+        tx_metrics: watch::Sender<RaftMetrics<C::NodeId>>,
         rx_shutdown: oneshot::Receiver<()>,
     ) -> JoinHandle<Result<(), Fatal<C::NodeId>>> {
         //
diff --git a/openraft/src/metrics/raft_metrics.rs b/openraft/src/metrics/raft_metrics.rs
index b42840e69..fbc2bc9e8 100644
--- a/openraft/src/metrics/raft_metrics.rs
+++ b/openraft/src/metrics/raft_metrics.rs
@@ -4,19 +4,19 @@ use crate::core::ServerState;
 use crate::error::Fatal;
 use crate::membership::EffectiveMembership;
 use crate::metrics::ReplicationMetrics;
-use crate::raft::RaftTypeConfig;
 use crate::summary::MessageSummary;
 use crate::versioned::Versioned;
 use crate::LogId;
+use crate::NodeId;
 
 /// A set of metrics describing the current state of a Raft node.
 #[derive(Clone, Debug, PartialEq, Eq)]
 #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize), serde(bound = ""))]
-pub struct RaftMetrics<C: RaftTypeConfig> {
-    pub running_state: Result<(), Fatal<C::NodeId>>,
+pub struct RaftMetrics<NID: NodeId> {
+    pub running_state: Result<(), Fatal<NID>>,
 
     /// The ID of the Raft node.
-    pub id: C::NodeId,
+    pub id: NID,
 
     // ---
     // --- data ---
@@ -28,11 +28,11 @@ pub struct RaftMetrics<C: RaftTypeConfig> {
     pub last_log_index: Option<u64>,
 
     /// The last log index has been applied to this Raft node's state machine.
-    pub last_applied: Option<LogId<C::NodeId>>,
+    pub last_applied: Option<LogId<NID>>,
 
     /// The id of the last log included in snapshot.
     /// If there is no snapshot, it is (0,0).
-    pub snapshot: Option<LogId<C::NodeId>>,
+    pub snapshot: Option<LogId<NID>>,
 
     // ---
     // --- cluster ---
@@ -41,19 +41,19 @@ pub struct RaftMetrics<C: RaftTypeConfig> {
     pub state: ServerState,
 
     /// The current cluster leader.
-    pub current_leader: Option<C::NodeId>,
+    pub current_leader: Option<NID>,
 
     /// The current membership config of the cluster.
-    pub membership_config: Arc<EffectiveMembership<C::NodeId>>,
+    pub membership_config: Arc<EffectiveMembership<NID>>,
 
     // ---
     // --- replication ---
     // ---
     /// The metrics about the leader. It is Some() only when this node is leader.
-    pub replication: Option<Versioned<ReplicationMetrics<C::NodeId>>>,
+    pub replication: Option<Versioned<ReplicationMetrics<NID>>>,
 }
 
-impl<C: RaftTypeConfig> MessageSummary<RaftMetrics<C>> for RaftMetrics<C> {
+impl<NID: NodeId> MessageSummary<RaftMetrics<NID>> for RaftMetrics<NID> {
     fn summary(&self) -> String {
         format!("Metrics{{id:{},{:?}, term:{}, last_log:{:?}, last_applied:{:?}, leader:{:?}, membership:{}, snapshot:{:?}, replication:{}",
                 self.id,
@@ -69,8 +69,8 @@ impl<C: RaftTypeConfig> MessageSummary<RaftMetrics<C>> for RaftMetrics<C> {
     }
 }
 
-impl<C: RaftTypeConfig> RaftMetrics<C> {
-    pub fn new_initial(id: C::NodeId) -> Self {
+impl<NID: NodeId> RaftMetrics<NID> {
+    pub fn new_initial(id: NID) -> Self {
         Self {
             running_state: Ok(()),
             id,
diff --git a/openraft/src/metrics/wait.rs b/openraft/src/metrics/wait.rs
index 887faed04..983add9e0 100644
--- a/openraft/src/metrics/wait.rs
+++ b/openraft/src/metrics/wait.rs
@@ -6,10 +6,10 @@ use tokio::time::Instant;
 
 use crate::core::ServerState;
 use crate::metrics::RaftMetrics;
-use crate::raft::RaftTypeConfig;
 use crate::LogId;
 use crate::LogIdOptionExt;
 use crate::MessageSummary;
+use crate::NodeId;
 
 // Error variants related to metrics.
 #[derive(Debug, thiserror::Error)]
@@ -22,16 +22,16 @@ pub enum WaitError {
 }
 
 /// Wait is a wrapper of RaftMetrics channel that impls several utils to wait for metrics to satisfy some condition.
-pub struct Wait<C: RaftTypeConfig> {
+pub struct Wait<NID: NodeId> {
     pub timeout: Duration,
-    pub rx: watch::Receiver<RaftMetrics<C>>,
+    pub rx: watch::Receiver<RaftMetrics<NID>>,
 }
 
-impl<C: RaftTypeConfig> Wait<C> {
+impl<NID: NodeId> Wait<NID> {
     /// Wait for metrics to satisfy some condition or timeout.
     #[tracing::instrument(level = "trace", skip(self, func), fields(msg=%msg.to_string()))]
-    pub async fn metrics<T>(&self, func: T, msg: impl ToString) -> Result<RaftMetrics<C>, WaitError>
-    where T: Fn(&RaftMetrics<C>) -> bool + Send {
+    pub async fn metrics<T>(&self, func: T, msg: impl ToString) -> Result<RaftMetrics<NID>, WaitError>
+    where T: Fn(&RaftMetrics<NID>) -> bool + Send {
         let timeout_at = Instant::now() + self.timeout;
 
         let mut rx = self.rx.clone();
@@ -96,7 +96,7 @@ impl<C: RaftTypeConfig> Wait<C> {
 
     /// Wait for `current_leader` to become `Some(leader_id)` until timeout.
     #[tracing::instrument(level = "trace", skip(self), fields(msg=msg.to_string().as_str()))]
-    pub async fn current_leader(&self, leader_id: C::NodeId, msg: impl ToString) -> Result<RaftMetrics<C>, WaitError> {
+    pub async fn current_leader(&self, leader_id: NID, msg: impl ToString) -> Result<RaftMetrics<NID>, WaitError> {
         self.metrics(
             |x| x.current_leader == Some(leader_id),
             &format!("{} .current_leader -> {}", msg.to_string(), leader_id),
@@ -106,7 +106,7 @@ impl<C: RaftTypeConfig> Wait<C> {
 
     /// Wait until applied exactly `want_log`(inclusive) logs or timeout.
     #[tracing::instrument(level = "trace", skip(self), fields(msg=msg.to_string().as_str()))]
-    pub async fn log(&self, want_log_index: Option<u64>, msg: impl ToString) -> Result<RaftMetrics<C>, WaitError> {
+    pub async fn log(&self, want_log_index: Option<u64>, msg: impl ToString) -> Result<RaftMetrics<NID>, WaitError> {
         self.metrics(
             |x| x.last_log_index == want_log_index,
             &format!("{} .last_log_index -> {:?}", msg.to_string(), want_log_index),
@@ -122,7 +122,7 @@ impl<C: RaftTypeConfig> Wait<C> {
 
     /// Wait until applied at least `want_log`(inclusive) logs or timeout.
     #[tracing::instrument(level = "trace", skip(self), fields(msg=msg.to_string().as_str()))]
-    pub async fn log_at_least(&self, want_log: Option<u64>, msg: impl ToString) -> Result<RaftMetrics<C>, WaitError> {
+    pub async fn log_at_least(&self, want_log: Option<u64>, msg: impl ToString) -> Result<RaftMetrics<NID>, WaitError> {
         self.metrics(
             |x| x.last_log_index >= want_log,
             &format!("{} .last_log_index >= {:?}", msg.to_string(), want_log),
@@ -138,7 +138,7 @@ impl<C: RaftTypeConfig> Wait<C> {
 
     /// Wait for `state` to become `want_state` or timeout.
     #[tracing::instrument(level = "trace", skip(self), fields(msg=msg.to_string().as_str()))]
-    pub async fn state(&self, want_state: ServerState, msg: impl ToString) -> Result<RaftMetrics<C>, WaitError> {
+    pub async fn state(&self, want_state: ServerState, msg: impl ToString) -> Result<RaftMetrics<NID>, WaitError> {
         self.metrics(
             |x| x.state == want_state,
             &format!("{} .state -> {:?}", msg.to_string(), want_state),
@@ -150,9 +150,9 @@ impl<C: RaftTypeConfig> Wait<C> {
     #[tracing::instrument(level = "trace", skip(self), fields(msg=msg.to_string().as_str()))]
     pub async fn members(
         &self,
-        want_members: BTreeSet<C::NodeId>,
+        want_members: BTreeSet<NID>,
         msg: impl ToString,
-    ) -> Result<RaftMetrics<C>, WaitError> {
+    ) -> Result<RaftMetrics<NID>, WaitError> {
         self.metrics(
             |x| {
                 let got = x.membership_config.nodes().map(|(nid, _)| *nid).collect::<BTreeSet<_>>();
@@ -165,11 +165,7 @@ impl<C: RaftTypeConfig> Wait<C> {
 
     /// Wait for `snapshot` to become `want_snapshot` or timeout.
     #[tracing::instrument(level = "trace", skip(self), fields(msg=msg.to_string().as_str()))]
-    pub async fn snapshot(
-        &self,
-        want_snapshot: LogId<C::NodeId>,
-        msg: impl ToString,
-    ) -> Result<RaftMetrics<C>, WaitError> {
+    pub async fn snapshot(&self, want_snapshot: LogId<NID>, msg: impl ToString) -> Result<RaftMetrics<NID>, WaitError> {
         self.metrics(
             |x| x.snapshot == Some(want_snapshot),
             &format!("{} .snapshot -> {:?}", msg.to_string(), want_snapshot),
diff --git a/openraft/src/metrics/wait_test.rs b/openraft/src/metrics/wait_test.rs
index d801f8e11..4c2f7e6f9 100644
--- a/openraft/src/metrics/wait_test.rs
+++ b/openraft/src/metrics/wait_test.rs
@@ -10,19 +10,18 @@ use crate::membership::EffectiveMembership;
 use crate::metrics::Wait;
 use crate::metrics::WaitError;
 use crate::raft_types::LogIdOptionExt;
-use crate::testing::DummyConfig as Config;
 use crate::LeaderId;
 use crate::LogId;
 use crate::Membership;
+use crate::NodeId;
 use crate::RaftMetrics;
-use crate::RaftTypeConfig;
 
 /// Test wait for different state changes
 #[tokio::test(flavor = "multi_thread", worker_threads = 8)]
 async fn test_wait() -> anyhow::Result<()> {
     {
         // wait for leader
-        let (init, w, tx) = init_wait_test::<Config>();
+        let (init, w, tx) = init_wait_test::<u64>();
 
         let h = tokio::spawn(async move {
             sleep(Duration::from_millis(10)).await;
@@ -38,7 +37,7 @@ async fn test_wait() -> anyhow::Result<()> {
 
     {
         // wait for log
-        let (init, w, tx) = init_wait_test::<Config>();
+        let (init, w, tx) = init_wait_test::<u64>();
 
         let h = tokio::spawn(async move {
             sleep(Duration::from_millis(10)).await;
@@ -66,7 +65,7 @@ async fn test_wait() -> anyhow::Result<()> {
 
     {
         // wait for state
-        let (init, w, tx) = init_wait_test::<Config>();
+        let (init, w, tx) = init_wait_test::<u64>();
 
         let h = tokio::spawn(async move {
             sleep(Duration::from_millis(10)).await;
@@ -83,7 +82,7 @@ async fn test_wait() -> anyhow::Result<()> {
 
     {
         // wait for members
-        let (init, w, tx) = init_wait_test::<Config>();
+        let (init, w, tx) = init_wait_test::<u64>();
 
         let h = tokio::spawn(async move {
             sleep(Duration::from_millis(10)).await;
@@ -106,7 +105,7 @@ async fn test_wait() -> anyhow::Result<()> {
 
     tracing::info!("--- wait for snapshot, Ok");
     {
-        let (init, w, tx) = init_wait_test::<Config>();
+        let (init, w, tx) = init_wait_test::<u64>();
 
         let h = tokio::spawn(async move {
             sleep(Duration::from_millis(10)).await;
@@ -123,7 +122,7 @@ async fn test_wait() -> anyhow::Result<()> {
 
     tracing::info!("--- wait for snapshot, only index matches");
     {
-        let (init, w, tx) = init_wait_test::<Config>();
+        let (init, w, tx) = init_wait_test::<u64>();
 
         let h = tokio::spawn(async move {
             sleep(Duration::from_millis(10)).await;
@@ -148,7 +147,7 @@ async fn test_wait() -> anyhow::Result<()> {
 
     {
         // timeout
-        let (_init, w, _tx) = init_wait_test::<Config>();
+        let (_init, w, _tx) = init_wait_test::<u64>();
 
         let h = tokio::spawn(async move {
             sleep(Duration::from_millis(200)).await;
@@ -171,10 +170,10 @@ async fn test_wait() -> anyhow::Result<()> {
 
 /// Build a initial state for testing of Wait:
 /// Returns init metrics, Wait, and the tx to send an updated metrics.
-fn init_wait_test<C: RaftTypeConfig>() -> (RaftMetrics<C>, Wait<C>, watch::Sender<RaftMetrics<C>>) {
+fn init_wait_test<NID: NodeId>() -> (RaftMetrics<NID>, Wait<NID>, watch::Sender<RaftMetrics<NID>>) {
     let init = RaftMetrics {
         running_state: Ok(()),
-        id: C::NodeId::default(),
+        id: NID::default(),
         state: ServerState::Learner,
         current_term: 0,
         last_log_index: None,
diff --git a/openraft/src/raft.rs b/openraft/src/raft.rs
index 3c450585f..96d52a461 100644
--- a/openraft/src/raft.rs
+++ b/openraft/src/raft.rs
@@ -119,7 +119,7 @@ enum CoreState<NID: NodeId> {
 
 struct RaftInner<C: RaftTypeConfig, N: RaftNetworkFactory<C>, S: RaftStorage<C>> {
     tx_api: mpsc::UnboundedSender<(RaftMsg<C, N, S>, Span)>,
-    rx_metrics: watch::Receiver<RaftMetrics<C>>,
+    rx_metrics: watch::Receiver<RaftMetrics<C::NodeId>>,
     // TODO(xp): it does not need to be a async mutex.
     #[allow(clippy::type_complexity)]
     tx_shutdown: Mutex<Option<oneshot::Sender<()>>>,
@@ -542,7 +542,7 @@ impl<C: RaftTypeConfig, N: RaftNetworkFactory<C>, S: RaftStorage<C>> Raft<C, N,
     }
 
     /// Get a handle to the metrics channel.
-    pub fn metrics(&self) -> watch::Receiver<RaftMetrics<C>> {
+    pub fn metrics(&self) -> watch::Receiver<RaftMetrics<C::NodeId>> {
         self.inner.rx_metrics.clone()
     }
 
@@ -563,7 +563,7 @@ impl<C: RaftTypeConfig, N: RaftNetworkFactory<C>, S: RaftStorage<C>> Raft<C, N,
     /// // wait for raft state to become a follower
     /// r.wait(None).state(State::Follower, "state").await?;
     /// ```
-    pub fn wait(&self, timeout: Option<Duration>) -> Wait<C> {
+    pub fn wait(&self, timeout: Option<Duration>) -> Wait<C::NodeId> {
         let timeout = match timeout {
             Some(t) => t,
             None => Duration::from_millis(500),
diff --git a/openraft/tests/fixtures/mod.rs b/openraft/tests/fixtures/mod.rs
index fdc87aab0..0deb26741 100644
--- a/openraft/tests/fixtures/mod.rs
+++ b/openraft/tests/fixtures/mod.rs
@@ -385,7 +385,7 @@ where
     }
 
     /// Get a payload of the latest metrics from each node in the cluster.
-    pub fn latest_metrics(&self) -> Vec<RaftMetrics<C>> {
+    pub fn latest_metrics(&self) -> Vec<RaftMetrics<C::NodeId>> {
         let rt = self.routing_table.lock().unwrap();
         let mut metrics = vec![];
         for node in rt.values() {
@@ -394,7 +394,7 @@ where
         metrics
     }
 
-    pub fn get_metrics(&self, node_id: &C::NodeId) -> Result<RaftMetrics<C>> {
+    pub fn get_metrics(&self, node_id: &C::NodeId) -> Result<RaftMetrics<C::NodeId>> {
         let node = self.get_raft_handle(node_id)?;
         let metrics = node.metrics().borrow().clone();
         Ok(metrics)
@@ -426,16 +426,16 @@ where
         func: T,
         timeout: Option<Duration>,
         msg: &str,
-    ) -> Result<RaftMetrics<C>>
+    ) -> Result<RaftMetrics<C::NodeId>>
     where
-        T: Fn(&RaftMetrics<C>) -> bool + Send,
+        T: Fn(&RaftMetrics<C::NodeId>) -> bool + Send,
     {
         let wait = self.wait(node_id, timeout);
         let rst = wait.metrics(func, format!("node-{} {}", node_id, msg)).await?;
         Ok(rst)
     }
 
-    pub fn wait(&self, node_id: &C::NodeId, timeout: Option<Duration>) -> Wait<C> {
+    pub fn wait(&self, node_id: &C::NodeId, timeout: Option<Duration>) -> Wait<C::NodeId> {
         let node = {
             let rt = self.routing_table.lock().unwrap();
             rt.get(node_id).expect("target node not found in routing table").clone().0