fix topic key for user events

src/ws/robust/subs.rs

@@ -1,4 +1,4 @@
-use super::super::ws_manager::{Message, SubscriptionSendData};
+use super::super::ws_manager::{Message, Subscription, SubscriptionSendData};
 use super::{Stream, Sub, SubId, SubToken, Subs, Unsubscribe};
 use crate::BaseUrl;
 use anyhow::Result;
@@ -24,6 +24,14 @@ impl Drop for SubToken {
 }
 
 impl Subs {
+    fn get_topic_key_for_subscription(topic: &Topic) -> String {
+        match topic {
+            Subscription::UserEvents { user: _ } => "userEvents".to_string(),
+            Subscription::OrderUpdates { user: _ } => "orderUpdates".to_string(),
+            _ => serde_json::to_string(topic).expect("Failed to convert subscription to string"),
+        }
+    }
+
     pub async fn connect(
         base_url: &BaseUrl,
         mut cancel_rx: mpsc::Receiver<()>,
@@ -75,7 +83,7 @@ impl Subs {
             .id_counter
             .fetch_add(1, std::sync::atomic::Ordering::SeqCst);
 
-        let topic_key = serde_json::to_string(&topic)?;
+        let topic_key = Self::get_topic_key_for_subscription(&topic);
 
         let sub = Sub {
             id,