+/**
+ * Signature of a chat message.
+ */
+#define GNUNET_SIGNATURE_PURPOSE_CHAT_MESSAGE 12
+
+/**
+ * Signature of confirmation receipt for a chat message.
+ */
+#define GNUNET_SIGNATURE_PURPOSE_CHAT_RECEIPT 13
+
+/**
+ * Signature of a network size estimate message.
+ */
+#define GNUNET_SIGNATURE_PURPOSE_NSE_SEND 14