diff -r 5315a5713dd5 -r b2e1b45382a4 src/net/java/otr4j/io/SerializationConstants.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/net/java/otr4j/io/SerializationConstants.java	Fri Apr 15 03:01:09 2011 +0200
@@ -0,0 +1,29 @@
+/*
+ * otr4j, the open source java otr library.
+ *
+ * Distributable under LGPL license.
+ * See terms of license at gnu.org.
+ */
+package net.java.otr4j.io;
+
+/**
+ * 
+ * @author George Politis
+ */
+public interface SerializationConstants {
+
+	public static final String HEAD = "?OTR";
+	public static final char HEAD_ENCODED = ':';
+	public static final char HEAD_ERROR = ' ';
+	public static final char HEAD_QUERY_Q = '?';
+	public static final char HEAD_QUERY_V = 'v';
+
+	public static final int TYPE_LEN_BYTE = 1;
+	public static final int TYPE_LEN_SHORT = 2;
+	public static final int TYPE_LEN_INT = 4;
+	public static final int TYPE_LEN_MAC = 20;
+	public static final int TYPE_LEN_CTR = 8;
+
+	public static final int DATA_LEN = TYPE_LEN_INT;
+	public static final int TLV_LEN = TYPE_LEN_SHORT;
+}