Important round mutation change

Author: Biatbe13

simulator/src/main/java/byzzbench/simulator/protocols/hbft/MessageLog.java

@@ -551,7 +551,7 @@ private void gcNewView(long newViewNumber) {
          * 4.4. This means that any view change votes and pending tickets that
          * are not in the new view are removed.
          */
-        this.viewChanges.remove(newViewNumber);
+        this.viewChanges.clear();
 
         Iterator<TicketKey> iterator = this.tickets.keySet().iterator();
         while (iterator.hasNext()) {

simulator/src/main/java/byzzbench/simulator/protocols/hbft/message/IPhaseMessage.java

@@ -1,12 +1,22 @@
 package byzzbench.simulator.protocols.hbft.message;
 
 import byzzbench.simulator.transport.MessagePayload;
+import byzzbench.simulator.transport.messages.MessageWithRound;
 
-public abstract class IPhaseMessage extends MessagePayload {
+public abstract class IPhaseMessage extends MessagePayload implements MessageWithRound {
     public abstract long getViewNumber();
 
     public abstract long getSequenceNumber();
 
     public abstract byte[] getDigest();
+
+    /**
+     * Get the request of the message.
+     *
+     * @return The request of the message.
+     */
+    public long getRound() {
+        return getSequenceNumber();
+    }
 
 }