update

src/NATSBridge.js

@@ -462,7 +462,7 @@ async function smartsend(subject, data, options = {}) {
      * @param {string} options.replyToMsgId - Message ID this message is replying to (default: "")
      * @param {boolean} options.isPublish - Whether to automatically publish the message to NATS (default: true)
      * 
-     * @returns {Promise<Object>} - An object with { env: MessageEnvelope, msg_json_str: string }
+     * @returns {Promise<Object>} - An object with { env: MessageEnvelope, env_json_str: string }
      */
     const {
         natsUrl = DEFAULT_NATS_URL,
@@ -559,17 +559,17 @@ async function smartsend(subject, data, options = {}) {
     });
     
     // Convert envelope to JSON string
-    const msg_json_str = env.toString();
+    const env_json_str = env.toString();
     
     // Publish to NATS if isPublish is true
     if (isPublish) {
-        await publish_message(natsUrl, subject, msg_json_str, correlationId);
+        await publish_message(natsUrl, subject, env_json_str, correlationId);
     }
     
     // Return both envelope and JSON string (tuple-like structure)
     return {
         env: env,
-        msg_json_str: msg_json_str
+        env_json_str: env_json_str
     };
 }