Correct name

src/discv5.rs

@@ -57,11 +57,11 @@ pub static HASH: for<'a> fn(topic: &'a str) -> TopicHash = |topic| {
 pub(crate) const KBUCKET_PENDING_TIMEOUT: Duration = Duration::from_secs(60);
 
 /// Custom ENR keys.
-const ENR_KEY_VERSION: &str = "version";
+const ENR_KEY_FEATURES: &str = "features";
 pub const ENR_KEY_TOPICS: &str = "topics";
 
-/// Discv5 versions.
-pub enum Version {
+/// Discv5 features.
+pub enum Features {
     /// The protocol for advertising and looking up to topics in Discv5 is supported.
     Topics = 1,
 }
@@ -156,16 +156,16 @@ impl Discv5 {
         )));
 
         // This node supports topic requests REGTOPIC and TOPICQUERY, and their responses.
-        if let Err(e) =
-            local_enr
-                .write()
-                .insert(ENR_KEY_VERSION, &[Version::Topics as u8], &enr_key.write())
-        {
+        if let Err(e) = local_enr.write().insert(
+            ENR_KEY_FEATURES,
+            &[Features::Topics as u8],
+            &enr_key.write(),
+        ) {
             error!("Failed writing to enr. Error {:?}", e);
             return Err("Failed to insert field 'version' into local enr");
         }
 
-        println!("{:?}", local_enr.read().get(ENR_KEY_VERSION).unwrap());
+        println!("{:?}", local_enr.read().get(ENR_KEY_FEATURES).unwrap());
 
         // Update the PermitBan list based on initial configuration
         *PERMIT_BAN_LIST.write() = config.permit_ban_list.clone();
@@ -868,12 +868,12 @@ impl Drop for Discv5 {
     }
 }
 
-/// Check if a given peer supports a given version of the Discv5 protocol.
-pub fn check_version(peer: &Enr, version: Version) -> bool {
-    if let Some(supported_versions) = peer.get(ENR_KEY_VERSION) {
-        if let Some(supported_versions) = supported_versions.first() {
-            let version_num = version as u8;
-            supported_versions & version_num == version_num
+/// Check if a given peer supports a given feature of the Discv5 protocol.
+pub fn supports_feature(peer: &Enr, feature: Features) -> bool {
+    if let Some(supported_features) = peer.get(ENR_KEY_FEATURES) {
+        if let Some(supported_features_num) = supported_features.first() {
+            let feature_num = feature as u8;
+            supported_features_num & feature_num == feature_num
         } else {
             false
         }

src/discv5/test.rs

@@ -1,7 +1,7 @@
 #![cfg(test)]
 
 use crate::{
-    discv5::{check_version, Version, ENR_KEY_VERSION},
+    discv5::{supports_feature, Features, ENR_KEY_FEATURES},
     kbucket, Discv5, *,
 };
 use enr::{k256, CombinedKey, Enr, EnrBuilder, EnrKey, NodeId};
@@ -639,9 +639,9 @@ fn test_version_check() {
         .udp4(port)
         .build(&key)
         .unwrap();
-    let supported_versions = Version::Topics as u8 | 2;
-    enr.insert(ENR_KEY_VERSION, &[supported_versions], &key)
+    let supported_versions = Features::Topics as u8 | 2;
+    enr.insert(ENR_KEY_FEATURES, &[supported_versions], &key)
         .unwrap();
 
-    assert!(check_version(&enr, Version::Topics));
+    assert!(supports_feature(&enr, Features::Topics));
 }

src/service.rs

@@ -22,7 +22,7 @@ use crate::{
         topic::TopicHash,
         Ads, AD_LIFETIME,
     },
-    discv5::{check_version, Version, ENR_KEY_TOPICS, KBUCKET_PENDING_TIMEOUT, PERMIT_BAN_LIST},
+    discv5::{supports_feature, Features, ENR_KEY_TOPICS, KBUCKET_PENDING_TIMEOUT, PERMIT_BAN_LIST},
     error::{RequestError, ResponseError},
     handler::{Handler, HandlerIn, HandlerOut},
     kbucket::{
@@ -743,7 +743,7 @@ impl Service {
                                 let mut discovered_new_peer = false;
                                 if let Some(kbuckets_topic) = self.topics_kbuckets.get_mut(&topic_hash) {
                                     for enr in found_enrs {
-                                        if !check_version(&enr, Version::Topics) {
+                                        if !supports_feature(&enr, Features::Topics) {
                                             continue;
                                         }
                                         trace!("Found new peer {} for topic {}", enr, topic_hash);
@@ -936,7 +936,7 @@ impl Service {
 
         for entry in self.kbuckets.write().iter() {
             let enr = entry.node.value.clone();
-            if !check_version(&enr, Version::Topics) {
+            if !supports_feature(&enr, Features::Topics) {
                 continue;
             }
             match kbuckets.insert_or_update(entry.node.key, enr, entry.status) {