Making the HtlcHash class implement the JsonSerializable interface

graphenej/src/main/java/cy/agorise/graphenej/HtlcHash.java

@@ -1,13 +1,16 @@
 package cy.agorise.graphenej;
 
 import com.google.common.primitives.Bytes;
+import com.google.gson.JsonArray;
+import com.google.gson.JsonElement;
 
 import cy.agorise.graphenej.interfaces.ByteSerializable;
+import cy.agorise.graphenej.interfaces.JsonSerializable;
 
 /**
  * Class used to represent a HTLC hash.
  */
-public class HtlcHash implements ByteSerializable {
+public class HtlcHash implements ByteSerializable, JsonSerializable {
     private HtlcHashType hashType;
     private byte[] hash;
 
@@ -16,9 +19,27 @@ public class HtlcHash implements ByteSerializable {
         this.hash = hash;
     }
 
+    public HtlcHashType getType(){
+        return this.hashType;
+    }
+
     @Override
     public byte[] toBytes() {
         byte[] hashTypeBytes = new byte[] { Util.revertInteger(hashType.ordinal())[3] };
         return Bytes.concat(hashTypeBytes, hash);
     }
+
+    @Override
+    public String toJsonString() {
+        JsonElement element = toJsonObject();
+        return element.toString();
+    }
+
+    @Override
+    public JsonElement toJsonObject() {
+        JsonArray array = new JsonArray();
+        array.add(hashType.ordinal());
+        array.add(Util.byteToString(hash));
+        return array;
+    }
 }