> ## Documentation Index
> Fetch the complete documentation index at: https://whatsapp-rust.jlucaso.com/llms.txt
> Use this file to discover all available pages before exploring further.

# September 23, 2026 — Favorite chats sync event

> Receive the favorite chats list from the phone through the new FavoritesUpdate event, emitted when the favorites app state mutation syncs.

## Features

**Favorite chats sync event ([#1544](https://github.com/oxidezap/whatsapp-rust/pull/1544))**

The client now dispatches [`FavoritesUpdate`](/concepts/events#favoritesupdate) when the `favorites` mutation arrives through app state sync. Before this change, you could write the favorite chats list with [`send_app_state_action`](/api/chat-actions#send_app_state_action) and `schemas::FAVORITES`, but the phone's list was decoded and dropped.

The event carries `action.favorites` (the full list in the phone's order, each entry's `id` a chat JID string), the mutation `timestamp`, and `from_full_sync`.

```rust theme={null}
use wacore::types::events::Event;

.on_event(|event, _client| async move {
    if let Event::FavoritesUpdate(update) = &*event {
        let chats: Vec<&str> = update
            .action
            .favorites
            .iter()
            .filter_map(|f| f.id.as_deref())
            .collect();
        println!("Favorite chats: {chats:?}");
    }
})
```

Each event replaces the previous list rather than describing a delta. An empty list is the valid "no favorites" state and still fires the event.