If applied, this commit will add new multi lb messages.

src/main/java/dlt/client/tangle/enums/TransactionType.java

@@ -5,5 +5,12 @@
  * @author Uellington Damasceno
  */
 public enum TransactionType {
-    LB_ENTRY, LB_ENTRY_REPLY, LB_STATUS, LB_REQUEST, LB_REPLY, LB_DEVICE;
+    LB_ENTRY, 
+    LB_ENTRY_REPLY,
+    LB_STATUS,
+    LB_REQUEST,
+    LB_REPLY,
+    LB_DEVICE,
+    LB_MULTI_REQUEST,
+    LB_MULTI_RESPONSE;
 }

src/main/java/dlt/client/tangle/model/transactions/LBMultiRequest.java

@@ -0,0 +1,15 @@
+package dlt.client.tangle.model.transactions;
+
+import dlt.client.tangle.enums.TransactionType;
+
+/**
+ *
+ * @author Uellington Damasceno
+ */
+public class LBMultiRequest extends TargetedTransaction {
+
+    public LBMultiRequest(String source, String group, String target) {
+        super(source, group, TransactionType.LB_MULTI_REQUEST, target);
+    }
+
+}

src/main/java/dlt/client/tangle/model/transactions/LBMultiResponse.java

@@ -0,0 +1,15 @@
+package dlt.client.tangle.model.transactions;
+
+import dlt.client.tangle.enums.TransactionType;
+
+/**
+ *
+ * @author Uellington Damasceno
+ */
+public class LBMultiResponse extends TargetedTransaction {
+
+    public LBMultiResponse(String source, String group, String target) {
+        super(source, group, TransactionType.LB_MULTI_RESPONSE, target);
+    }
+
+}

src/main/java/dlt/client/tangle/model/transactions/Transaction.java

@@ -12,7 +12,7 @@ public  class Transaction {
     private final String group;
     private final TransactionType type;
 
-    private long createdAt;
+    private final long createdAt;
     private long publishedAt;
 
     public Transaction(String source, String group, TransactionType type) {
@@ -45,6 +45,14 @@ public final void setPublishedAt(long publishedAt) {
     public final long getPublishedAt() {
         return this.publishedAt;
     }
+
+    public final boolean isLoopback(String source){
+        return this.source.equals(source);
+    }
+
+    public final boolean is(TransactionType transactionType){
+        return this.type.equals(transactionType);
+    }
 
     @Override
     public String toString() {