Pass chatbox or _converse as context

src/converse-omemo.js

@@ -1205,7 +1205,7 @@ converse.plugins.add('converse-omemo', {
             }
         });
 
-        function parseEncryptedMessage (attrs) {
+        function parseEncryptedMessage (stanza, attrs) {
             if (attrs.is_encrypted) {
                 // https://xmpp.org/extensions/xep-0384.html#usecases-receiving
                 if (attrs.encrypted.prekey === true) {

src/headless/utils/stanza.js

@@ -537,7 +537,7 @@ const st = {
          * *Hook* which allows plugins to add additional parsing
          * @event _converse#parseMessage
          */
-        return api.hook('parseMessage', attrs);
+        return api.hook('parseMessage', _converse, attrs);
     },
 
     /**
@@ -685,7 +685,7 @@ const st = {
          * *Hook* which allows plugins to add additional parsing
          * @event _converse#parseMUCMessage
          */
-        return api.hook('parseMUCMessage', stanza, attrs);
+        return api.hook('parseMUCMessage', chatbox, attrs);
     },
 
     /**