It's now possible to send a 'version' message that will be accepted by the other node.

domain/src/main/java/ch/dissem/bitmessage/factory/Factory.java

@@ -0,0 +1,54 @@
+/*
+ * Copyright 2015 Christian Basler
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package ch.dissem.bitmessage.factory;
+
+import ch.dissem.bitmessage.entity.NetworkMessage;
+import ch.dissem.bitmessage.entity.payload.GenericPayload;
+import ch.dissem.bitmessage.entity.payload.GetPubkey;
+import ch.dissem.bitmessage.entity.payload.ObjectPayload;
+import ch.dissem.bitmessage.utils.Decode;
+
+import java.io.IOException;
+import java.io.InputStream;
+
+/**
+ * Creates {@link NetworkMessage} objects from {@link InputStream InputStreams}
+ */
+public class Factory {
+    public static NetworkMessage getNetworkMessage(int version, InputStream stream) throws IOException {
+        return new V3MessageFactory().read(stream);
+    }
+
+    static ObjectPayload getObjectPayload(long objectType, long version, InputStream stream, int length) throws IOException {
+        if (objectType < 4) {
+            switch ((int) objectType) {
+                case 0: // getpubkey
+                    return new GetPubkey(Decode.bytes(stream, length));
+                case 1: // pubkey
+                    break;
+                case 2: // msg
+                    break;
+                case 3: // broadcast
+                    break;
+            }
+            throw new RuntimeException("This must not happen, someone broke something in the code!");
+        } else {
+            // passthrough message
+            return new GenericPayload(Decode.bytes(stream, length));
+        }
+    }
+}