diff --git a/contracts/dao/extensions/aibtcdev-messaging.clar b/contracts/dao/extensions/aibtcdev-messaging.clar
index ef41573..7c78be0 100644
--- a/contracts/dao/extensions/aibtcdev-messaging.clar
+++ b/contracts/dao/extensions/aibtcdev-messaging.clar
@@ -18,8 +18,9 @@
   (ok true)
 )
 
-(define-public (send (msg (string-ascii 1048576)) (opcode (optional (buff 16))))
+(define-public (send (msg (string-ascii 1048576)) (isFromDao bool))
   (begin
+    (and isFromDao (try! (is-dao-or-extension)))
     (asserts! (> (len msg) u0) INPUT_ERROR)
     ;; print the message as the first event
     (print msg)
@@ -29,9 +30,19 @@
       payload: {
         caller: contract-caller,
         height: block-height,
+        isFromDao: isFromDao,
         sender: tx-sender,
       }
     })
     (ok true)
   )
 )
+
+;; private functions
+;;
+
+(define-private (is-dao-or-extension)
+  (ok (asserts! (or (is-eq tx-sender .aibtcdev-dao)
+    (contract-call? .aibtcdev-dao is-extension contract-caller)) ERR_UNAUTHORIZED
+  ))
+)
diff --git a/contracts/dao/traits/aibtcdev-dao-traits-v1.clar b/contracts/dao/traits/aibtcdev-dao-traits-v1.clar
index 4b716d2..445f021 100644
--- a/contracts/dao/traits/aibtcdev-dao-traits-v1.clar
+++ b/contracts/dao/traits/aibtcdev-dao-traits-v1.clar
@@ -47,10 +47,11 @@
 
 (define-trait messaging
   (
-    ;; send a message on-chain
+    ;; send a message on-chain (opt from DAO)
     ;; @param msg the message to send (up to 1MB)
+    ;; @param isFromDao whether the message is from the DAO
     ;; @returns (response bool uint)
-    (send ((string-ascii 1048576)) (response bool uint))
+    (send ((string-ascii 1048576) bool) (response bool uint))
   )
 )