[Validation] Verify qfc in CDKGSession::FinalizeCommitments

src/llmq/quorums_dkgsession.cpp

@@ -1189,6 +1189,11 @@ std::vector<CFinalCommitment> CDKGSession::FinalizeCommitments()
 
     cxxtimer::Timer totalTimer(true);
 
+    std::vector<CBLSPublicKey> allkeys;
+    for (const auto& m : members) {
+        allkeys.emplace_back(m->dmn->pdmnState->pubKeyOperator.Get());
+    }
+
     typedef std::vector<bool> Key;
     std::map<Key, std::vector<CDKGPrematureCommitment>> commitmentsMap;
 
@@ -1264,13 +1269,21 @@ std::vector<CFinalCommitment> CDKGSession::FinalizeCommitments()
         }
         t2.stop();
 
+        cxxtimer::Timer t3(true);
+        if (!fqc.Verify(allkeys, params)) {
+            logger.Batch("failed to verify final commitment");
+            continue;
+        }
+        t3.stop();
+
         finalCommitments.emplace_back(fqc);
 
-        logger.Batch("final commitment: validMembers=%d, signers=%d, quorumPublicKey=%s, time1=%d, time2=%d",
+        logger.Batch("final commitment: validMembers=%d, signers=%d, quorumPublicKey=%s, time1=%d, time2=%d, time3=%d, total=%d",
                         fqc.CountValidMembers(), fqc.CountSigners(), fqc.quorumPublicKey.ToString(),
-                        t1.count(), t2.count());
+                        t1.count(), t2.count(), t3.count(), totalTimer.count());
     }
 
+    totalTimer.stop();
     logger.Flush();
 
     return finalCommitments;