create_update_transaction returns NewTxMessage

src/api.rs

@@ -1323,8 +1323,11 @@ pub fn create_update_transaction(
         validation_token: vec![],
     });
 
+    // Create the new_tx message
+    let new_tx_msg = NewTxMessage::new(serialize(&final_tx).to_lower_hex_string(), None);
+
     Ok(ApiReturn {
-        new_tx_to_send: Some(serialize(&final_tx).to_lower_hex_string()),
+        new_tx_to_send: Some(new_tx_msg),
         updated_process: Some((commitment_outpoint.to_string(), relevant_process.clone())),
         ciphers_to_send: ciphers,
         ..Default::default()