diff -r fbd3585af53e -r 0ff0059f2ec3 src/net/java/otr4j/io/messages/AbstractEncodedMessage.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/net/java/otr4j/io/messages/AbstractEncodedMessage.java	Sun Dec 05 18:43:51 2010 +0100
@@ -0,0 +1,52 @@
+/*
+ * otr4j, the open source java otr library.
+ *
+ * Distributable under LGPL license.
+ * See terms of license at gnu.org.
+ */
+package net.java.otr4j.io.messages;
+
+/**
+ * 
+ * @author George Politis
+ */
+public abstract class AbstractEncodedMessage extends AbstractMessage {
+	// Fields.
+	public int protocolVersion;
+
+	// Ctor.
+	public AbstractEncodedMessage(int messageType, int protocolVersion) {
+		super(messageType);
+		this.protocolVersion = protocolVersion;
+	}
+
+	// Methods.
+	@Override
+	public int hashCode() {
+		final int prime = 31;
+		int result = super.hashCode();
+		result = prime * result + protocolVersion;
+		return result;
+	}
+
+	@Override
+	public boolean equals(Object obj) {
+		if (this == obj)
+			return true;
+		if (!super.equals(obj))
+			return false;
+		if (getClass() != obj.getClass())
+			return false;
+		AbstractEncodedMessage other = (AbstractEncodedMessage) obj;
+		if (protocolVersion != other.protocolVersion)
+			return false;
+		return true;
+	}
+
+	// Encoded Message Types
+	public static final int MESSAGE_DH_COMMIT = 0x02;
+	public static final int MESSAGE_DATA = 0x03;
+	public static final int MESSAGE_DHKEY = 0x0a;
+	public static final int MESSAGE_REVEALSIG = 0x11;
+	public static final int MESSAGE_SIGNATURE = 0x12;
+}