avoid persisting when maybe sending deposits confirmed message

common/src/main/java/haveno/common/persistence/PersistenceManager.java

@@ -413,6 +413,11 @@ public class PersistenceManager<T extends PersistableEnvelope> {
     public void requestPersistence() {
         if (flushAtShutdownCalled) {
             log.warn("We have started the shut down routine already. We ignore that requestPersistence call.");
+            try {
+                throw new RuntimeException("We have started the shut down routine already. We ignore that requestPersistence call.");
+            } catch (Exception e) {
+                e.printStackTrace();
+            }
             return;
         }
 

core/src/main/java/haveno/core/trade/Trade.java

@@ -1359,6 +1359,15 @@ public abstract class Trade implements Tradable, Model {
         throw new RuntimeException("Trade is not maker, taker, or arbitrator");
     }
 
+    private List<TradePeer> getPeers() {
+        List<TradePeer> peers = new ArrayList<TradePeer>();
+        peers.add(getMaker());
+        peers.add(getTaker());
+        peers.add(getArbitrator());
+        if (!peers.remove(getSelf())) throw new IllegalStateException("Failed to remove self from list of peers");
+        return peers;
+    }
+
     public TradePeer getArbitrator() {
         return processModel.getArbitrator();
     }
@@ -1522,6 +1531,16 @@ public abstract class Trade implements Tradable, Model {
         return isDepositsPublished() && getState().getPhase().ordinal() >= Phase.DEPOSITS_CONFIRMED.ordinal();
     }
 
+    // TODO: hacky way to check for deposits confirmed acks, redundant with getDepositsConfirmedTasks()
+    public boolean isDepositsConfirmedAcked() {
+        if (this instanceof BuyerTrade) {
+            return getArbitrator().isDepositsConfirmedMessageAcked();
+        } else {
+            for (TradePeer peer : getPeers()) if (!peer.isDepositsConfirmedMessageAcked()) return false;
+            return true;
+        }
+    }
+
     public boolean isDepositsUnlocked() {
         return isDepositsPublished() && getState().getPhase().ordinal() >= Phase.DEPOSITS_UNLOCKED.ordinal();
     }

core/src/main/java/haveno/core/trade/protocol/TradeProtocol.java

@@ -863,9 +863,9 @@ public abstract class TradeProtocol implements DecryptedDirectMessageListener, D
     }
 
     public void maybeSendDepositsConfirmedMessages() {
-        if (trade.isShutDownStarted()) return;
         synchronized (trade) {
-            if (!trade.isInitialized()) return; // skip if shutting down
+            if (trade.isDepositsConfirmedAcked()) return;
+            if (!trade.isInitialized() || trade.isShutDownStarted()) return; // skip if shutting down
             latchTrade();
             expect(new Condition(trade))
                     .setup(tasks(getDepositsConfirmedTasks())