stops submitting zero val bundles to the spent addresses service

src/main/java/com/iota/iri/service/spentaddresses/impl/SpentAddressesServiceImpl.java

@@ -95,6 +95,9 @@ public void persistSpentAddresses(Collection<TransactionViewModel> transactions)
     }
 
     public void persistValidatedSpentAddressesAsync(Collection<TransactionViewModel> transactions) {
+        if(transactions.stream().noneMatch(tx -> tx.value() < 0)){
+            return;
+        }
         asyncSpentAddressesPersistor.submit(() -> {
             try {
                 List<Hash> spentAddresses = transactions.stream()

src/test/java/com/iota/iri/service/spentaddresses/impl/SpentAddressesServiceImplTest.java

@@ -0,0 +1,45 @@
+package com.iota.iri.service.spentaddresses.impl;
+
+import com.iota.iri.BundleValidator;
+import com.iota.iri.TangleMockUtils;
+import com.iota.iri.controllers.TransactionViewModel;
+import com.iota.iri.service.snapshot.SnapshotProvider;
+import com.iota.iri.service.spentaddresses.SpentAddressesProvider;
+import com.iota.iri.storage.Tangle;
+import org.junit.Rule;
+import org.junit.Test;
+import org.mockito.Mock;
+import org.mockito.junit.MockitoJUnit;
+import org.mockito.junit.MockitoRule;
+
+import java.util.List;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.*;
+
+public class SpentAddressesServiceImplTest {
+
+    @Rule
+    public MockitoRule mockitoRule = MockitoJUnit.rule();
+
+    @Mock
+    private Tangle tangle;
+
+    @Mock
+    private BundleValidator bundleValidator;
+
+    @Mock
+    private SnapshotProvider snapshotProvider;
+
+    @Mock
+    private SpentAddressesProvider spentAddressesProvider;
+
+    @Test
+    public void doesntPersistZeroValueBundles() throws Exception {
+        SpentAddressesServiceImpl spentAddressesService = new SpentAddressesServiceImpl();
+        spentAddressesService.init(tangle, snapshotProvider, spentAddressesProvider, bundleValidator, null);
+        List<TransactionViewModel> bundle = TangleMockUtils.mockValidBundle(tangle, bundleValidator, 1);
+        spentAddressesService.persistValidatedSpentAddressesAsync(bundle);
+        verify(spentAddressesProvider, never()).saveAddressesBatch(any());
+    }
+}