feat: having EldersInfo change candidate considered as DKG in progress

src/consensus/dkg.rs

@@ -197,13 +197,6 @@ impl DkgVoter {
         }
     }
 
-    // Checks whether there is any on-going DKG session.
-    pub fn has_ongoing_dkg(&self) -> bool {
-        self.sessions
-            .values()
-            .any(|session| !session.is_finalized())
-    }
-
     // Handle a received DkgMessage.
     pub fn process_message(
         &mut self,
@@ -377,10 +370,6 @@ impl Session {
         }
     }
 
-    fn is_finalized(&self) -> bool {
-        self.key_gen.is_finalized()
-    }
-
     fn report_failure(&mut self, dkg_key: &DkgKey, keypair: &Keypair) -> Vec<DkgCommand> {
         let proof = DkgFailureProof::new(keypair, dkg_key);
 

src/routing/approved.rs

@@ -1848,7 +1848,12 @@ impl Approved {
     }
 
     pub fn check_key_status(&self, bls_pk: &bls::PublicKey) -> Result<(), InfrastructureError> {
-        if self.dkg_voter.has_ongoing_dkg() {
+        // Whenever there is EldersInfo change candidate, it is considered as having ongoing DKG.
+        if !self
+            .section
+            .promote_and_demote_elders(&self.node.name())
+            .is_empty()
+        {
             return Err(InfrastructureError::DkgInProgress);
         }
         if !self.section.chain().has_key(bls_pk) {