chore: fix ping pong example

conversations/examples/persist_chat.rs

@@ -83,10 +83,9 @@ fn main() {
     // =========================================
     println!("Step 5: Verifying persistence...\n");
 
-    println!("  Active chats in memory: {:?}", alice.list_chats());
     println!(
         "  Chats persisted to storage: {:?}",
-        alice.list_stored_chats().unwrap()
+        alice.list_chats().unwrap()
     );
     println!();
 
@@ -111,7 +110,7 @@ fn main() {
     );
     println!(
         "  ✓ Stored chats: {:?}",
-        alice_restored.list_stored_chats().unwrap()
+        alice_restored.list_chats().unwrap()
     );
     println!();
 

conversations/examples/ping_pong.rs

@@ -1,20 +1,26 @@
 //! Example: Ping-Pong Chat
 //!
 //! This example demonstrates a back-and-forth conversation between two users
-//! using in-memory storage (no persistence).
+//! using temporary file storage.
 //!
 //! Run with: cargo run -p logos-chat --example ping_pong
 
 use logos_chat::{ChatManager, StorageConfig};
+use tempfile::tempdir;
 
 fn main() {
     println!("=== Ping-Pong Chat Example ===\n");
 
-    // Create two chat participants with in-memory storage
+    // Create temporary directories for storage
-    let mut alice =
+    let dir = tempdir().expect("Failed to create temp dir");
-        ChatManager::open(StorageConfig::InMemory).expect("Failed to create Alice's chat manager");
+    let alice_db = dir.path().join("alice.db");
-    let mut bob =
+    let bob_db = dir.path().join("bob.db");
-        ChatManager::open(StorageConfig::InMemory).expect("Failed to create Bob's chat manager");
+
+    // Create two chat participants with file-based storage
+    let mut alice = ChatManager::open(StorageConfig::File(alice_db.to_str().unwrap().to_string()))
+        .expect("Failed to create Alice's chat manager");
+    let mut bob = ChatManager::open(StorageConfig::File(bob_db.to_str().unwrap().to_string()))
+        .expect("Failed to create Bob's chat manager");
 
     println!("Created participants:");
     println!("  Alice: {}", alice.local_address());
@@ -32,35 +38,65 @@ fn main() {
     println!("  Chat ID: {}", &alice_chat_id);
     println!("  Envelopes: {}", initial_envelopes.len());
 
-    // Simulate delivering to Bob (stub)
+    // Bob receives the message
-    for env in &initial_envelopes {
+    let envelope = initial_envelopes.first().unwrap();
-        let _ = bob.handle_incoming(&env.data);
+    let content = bob.handle_incoming(&envelope.data).unwrap();
-    }
+    println!(
+        "  Bob received: \"{}\"",
+        String::from_utf8_lossy(&content.data)
+    );
+
+    // Get Bob's chat ID (same as Alice's due to shared conversation_hint)
+    let bob_chat_id = bob.list_chats().unwrap().first().unwrap().clone();
+    println!("  Bob's chat ID: {}", &bob_chat_id);
+    println!();
+
+    // Bob replies
+    let bob_envelopes = bob.send_message(&bob_chat_id, b"Pong!").unwrap();
+    println!("Bob -> Alice: \"Pong!\"");
+    println!("  Envelopes: {}", bob_envelopes.len());
+
+    let bob_reply = bob_envelopes.first().unwrap();
+    let alice_received = alice.handle_incoming(&bob_reply.data).unwrap();
+    println!(
+        "  Alice received: \"{}\"",
+        String::from_utf8_lossy(&alice_received.data)
+    );
     println!();
 
     // Continue the conversation
-    let messages = [("Alice", "How's it going?"), ("Alice", "Are you there?")];
+    let alice_messages = ["How's it going?", "Are you there?"];
+    let bob_replies = ["Pretty good!", "Yes, I'm here!"];
 
-    for (sender, msg) in &messages {
+    for (msg, reply) in alice_messages.iter().zip(bob_replies.iter()) {
+        // Alice sends
         let envelopes = alice.send_message(&alice_chat_id, msg.as_bytes()).unwrap();
+        println!("Alice -> Bob: \"{}\"", msg);
 
-        println!("{} -> Bob: \"{}\"", sender, msg);
+        let env = envelopes.first().unwrap();
-        println!("  Envelopes: {}", envelopes.len());
+        let bob_received = bob.handle_incoming(&env.data).unwrap();
+        println!(
+            "  Bob received: \"{}\"",
+            String::from_utf8_lossy(&bob_received.data)
+        );
 
-        // Simulate delivery
+        // Bob replies
-        for env in &envelopes {
+        let bob_envs = bob.send_message(&bob_chat_id, reply.as_bytes()).unwrap();
-            let _ = bob.handle_incoming(&env.data);
+        println!("Bob -> Alice: \"{}\"", reply);
-        }
+
+        let bob_env = bob_envs.first().unwrap();
+        let alice_got = alice.handle_incoming(&bob_env.data).unwrap();
+        println!(
+            "  Alice received: \"{}\"",
+            String::from_utf8_lossy(&alice_got.data)
+        );
+        println!();
     }
 
-    println!();
     println!("Chat statistics:");
-    println!("  Alice's active chats: {:?}", alice.list_chats());
+    println!("  Alice's chats: {:?}", alice.list_chats().unwrap());
-    println!("  Bob's active chats: {:?}", bob.list_chats());
+    println!("  Bob's chats: {:?}", bob.list_chats().unwrap());
     println!();
 
     println!("=== Example Complete ===");
-    println!();
-    println!("Note: Full message roundtrip requires implementing handle_incoming()");
-    println!("to properly decrypt messages and establish the chat on the receiver side.");
 }

conversations/src/chat.rs

@@ -3,7 +3,6 @@
 //! This is the main entry point for the conversations API. It handles all
 //! storage operations internally - users don't need to interact with storage directly.
 
-use std::collections::HashMap;
 use std::rc::Rc;
 
 use double_ratchets::storage::RatchetStorage;
@@ -34,15 +33,12 @@ pub enum ChatManagerError {
 
     #[error("chat not found: {0}")]
     ChatNotFound(String),
-
-    #[error("chat not loaded: {0} (exists in storage but not in memory)")]
-    ChatNotLoaded(String),
 }
 
 /// ChatManager is the main entry point for the conversations API.
 ///
-/// It manages identity, inbox, active chats, and automatically persists
+/// It manages identity, inbox, and chats with all state persisted to SQLite.
-/// all state changes to SQLite storage.
+/// Chats are loaded from storage on each operation - no in-memory caching.
 ///
 /// # Example
 ///
@@ -68,13 +64,10 @@ pub enum ChatManagerError {
 /// ```
 pub struct ChatManager {
     identity: Rc<Identity>,
-    /// In-memory cache of active chats. Chats are loaded from storage on demand.
-    chats: HashMap<String, PrivateV1Convo>,
     inbox: Inbox,
     /// Storage for chat metadata (identity, inbox keys, chat records).
     storage: ChatStorage,
     /// Storage config for creating ratchet storage instances.
-    /// Each PrivateV1Convo gets its own storage instance (with RatchetSession).
     storage_config: StorageConfig,
 }
 
@@ -83,8 +76,6 @@ impl ChatManager {
     ///
     /// If an identity exists in storage, it will be restored.
     /// Otherwise, a new identity will be created and saved.
-    ///
-    /// Inbox ephemeral keys are loaded lazily when handling incoming handshakes.
     pub fn open(config: StorageConfig) -> Result<Self, ChatManagerError> {
         let mut storage = ChatStorage::new(config.clone())?;
 
@@ -105,7 +96,6 @@ impl ChatManager {
 
         Ok(Self {
             identity,
-            chats: HashMap::new(),
             inbox,
             storage,
             storage_config: config,
@@ -122,6 +112,22 @@ impl ChatManager {
         Ok(RatchetStorage::with_config(self.storage_config.clone())?)
     }
 
+    /// Load a chat from storage.
+    fn load_chat(&self, chat_id: &str) -> Result<PrivateV1Convo, ChatManagerError> {
+        let ratchet_storage = self.create_ratchet_storage()?;
+        if ratchet_storage.exists(chat_id)? {
+            Ok(PrivateV1Convo::open(ratchet_storage, chat_id.to_string())?)
+        } else if self.storage.chat_exists(chat_id)? {
+            // Chat metadata exists but no ratchet state - data inconsistency
+            Err(ChatManagerError::ChatNotFound(format!(
+                "{} (corrupted: missing ratchet state)",
+                chat_id
+            )))
+        } else {
+            Err(ChatManagerError::ChatNotFound(chat_id.to_string()))
+        }
+    }
+
     /// Get the local identity's public address.
     ///
     /// This address can be shared with others so they can identify you.
@@ -180,9 +186,7 @@ impl ChatManager {
         self.storage.save_chat(&chat_record)?;
 
         // Ratchet state is automatically persisted by RatchetSession
-
+        // convo is dropped here - state already saved
-        // Store in memory cache
-        self.chats.insert(chat_id.clone(), convo);
 
         Ok((chat_id, envelopes))
     }
@@ -195,13 +199,8 @@ impl ChatManager {
         chat_id: &str,
         content: &[u8],
     ) -> Result<Vec<AddressedEnvelope>, ChatManagerError> {
-        // Try to load chat from storage if not in memory
+        // Load chat from storage
-        self.ensure_chat_loaded(chat_id)?;
+        let mut chat = self.load_chat(chat_id)?;
-
-        let chat = self
-            .chats
-            .get_mut(chat_id)
-            .ok_or_else(|| ChatManagerError::ChatNotFound(chat_id.to_string()))?;
 
         let payloads = chat.send_message(content)?;
 
@@ -214,29 +213,6 @@ impl ChatManager {
             .collect())
     }
 
-    /// Ensure a chat is loaded into memory. Loads from storage if needed.
-    fn ensure_chat_loaded(&mut self, chat_id: &str) -> Result<(), ChatManagerError> {
-        if self.chats.contains_key(chat_id) {
-            return Ok(());
-        }
-
-        // Try to load conversation from storage via RatchetSession
-        let ratchet_storage = self.create_ratchet_storage()?;
-        if ratchet_storage.exists(chat_id)? {
-            let convo = PrivateV1Convo::open(ratchet_storage, chat_id.to_string())?;
-            self.chats.insert(chat_id.to_string(), convo);
-            Ok(())
-        } else if self.storage.chat_exists(chat_id)? {
-            // Chat metadata exists but no ratchet state - this is a data inconsistency
-            Err(ChatManagerError::ChatNotFound(format!(
-                "{} (corrupted: missing ratchet state)",
-                chat_id
-            )))
-        } else {
-            Err(ChatManagerError::ChatNotFound(chat_id.to_string()))
-        }
-    }
-
     /// Handle an incoming payload from the network.
     ///
     /// This processes both inbox handshakes (to establish new chats) and
@@ -265,9 +241,15 @@ impl ChatManager {
     }
 
     /// Handle an inbox handshake to establish a new chat.
-    fn handle_inbox_handshake(&mut self, conversation_hint: &str, payload: &[u8]) -> Result<ContentData, ChatManagerError> {
+    fn handle_inbox_handshake(
+        &mut self,
+        conversation_hint: &str,
+        payload: &[u8],
+    ) -> Result<ContentData, ChatManagerError> {
         let ratchet_storage = self.create_ratchet_storage()?;
-        let result = self.inbox.handle_frame(ratchet_storage, conversation_hint, payload)?;
+        let result = self
+            .inbox
+            .handle_frame(ratchet_storage, conversation_hint, payload)?;
 
         let chat_id = result.convo.id().to_string();
 
@@ -281,9 +263,8 @@ impl ChatManager {
         };
         self.storage.save_chat(&chat_record)?;
 
-        // Store the conversation in memory cache
+        // Ratchet state is automatically persisted by RatchetSession
-        // (ratchet state is already persisted by RatchetSession)
+        // result.convo is dropped here - state already saved
-        self.chats.insert(chat_id.clone(), result.convo);
 
         Ok(ContentData {
             conversation_id: chat_id,
@@ -299,55 +280,37 @@ impl ChatManager {
         chat_id: &str,
         payload: &[u8],
     ) -> Result<ContentData, ChatManagerError> {
-        // Ensure the chat is loaded
+        // Load chat from storage
-        self.ensure_chat_loaded(chat_id)?;
+        let mut chat = self.load_chat(chat_id)?;
-
-        let chat = self
-            .chats
-            .get_mut(chat_id)
-            .ok_or_else(|| ChatManagerError::ChatNotFound(chat_id.to_string()))?;
 
         // Decode and decrypt the payload
-        let encrypted_payload = proto::EncryptedPayload::decode(payload)
+        let encrypted_payload = proto::EncryptedPayload::decode(payload).map_err(|e| {
-            .map_err(|e| ChatManagerError::Chat(ChatError::Protocol(format!("failed to decode: {}", e))))?;
+            ChatManagerError::Chat(ChatError::Protocol(format!("failed to decode: {}", e)))
+        })?;
 
         let frame = chat.decrypt(encrypted_payload)?;
         let content = PrivateV1Convo::extract_content(&frame).unwrap_or_default();
 
+        // Ratchet state is automatically persisted by RatchetSession
+
         Ok(ContentData {
             conversation_id: chat_id.to_string(),
             data: content,
         })
     }
 
-    /// Get a reference to an active chat.
-    pub fn get_chat(&mut self, chat_id: &str) -> Option<&PrivateV1Convo> {
-        // Try to load from storage if not in memory
-        let _ = self.ensure_chat_loaded(chat_id);
-        self.chats.get(chat_id)
-    }
-
-    /// List all active chat IDs (in memory).
-    pub fn list_chats(&self) -> Vec<String> {
-        self.chats.keys().cloned().collect()
-    }
-
     /// List all chat IDs from storage.
-    pub fn list_stored_chats(&self) -> Result<Vec<String>, ChatManagerError> {
+    pub fn list_chats(&self) -> Result<Vec<String>, ChatManagerError> {
         Ok(self.storage.list_chat_ids()?)
     }
 
-    /// Check if a chat exists (in memory or storage).
+    /// Check if a chat exists in storage.
     pub fn chat_exists(&self, chat_id: &str) -> Result<bool, ChatManagerError> {
-        if self.chats.contains_key(chat_id) {
-            return Ok(true);
-        }
         Ok(self.storage.chat_exists(chat_id)?)
     }
 
-    /// Delete a chat from both memory and storage.
+    /// Delete a chat from storage.
     pub fn delete_chat(&mut self, chat_id: &str) -> Result<(), ChatManagerError> {
-        self.chats.remove(chat_id);
         self.storage.delete_chat(chat_id)?;
         // Also delete ratchet state from double-ratchets storage
         if let Ok(mut ratchet_storage) = self.create_ratchet_storage() {
@@ -410,7 +373,7 @@ mod tests {
         assert!(!envelopes.is_empty());
 
         // Chat should be persisted
-        let stored = alice.list_stored_chats().unwrap();
+        let stored = alice.list_chats().unwrap();
         assert!(stored.contains(&chat_id));
     }
 
@@ -453,7 +416,7 @@ mod tests {
 
         // Chat should no longer exist
         assert!(!alice.chat_exists(&chat_id).unwrap());
-        assert!(alice.list_chats().is_empty());
+        assert!(alice.list_chats().unwrap().is_empty());
     }
 
     #[test]
@@ -482,8 +445,8 @@ mod tests {
             alice.send_message(&chat_id, b"Message 2").unwrap();
             alice.send_message(&chat_id, b"Message 3").unwrap();
 
-            // Chat should be in memory
+            // Chat should be in storage
-            assert!(alice.chats.contains_key(&chat_id));
+            assert!(alice.chat_exists(&chat_id).unwrap());
         }
         // alice is dropped here, simulating app close
 
@@ -493,35 +456,39 @@ mod tests {
                 ChatManager::open(StorageConfig::File(db_path.to_str().unwrap().to_string()))
                     .unwrap();
 
-            // Chat is in storage but not loaded yet
+            // Chat should still be in storage
-            assert!(alice2.list_stored_chats().unwrap().contains(&chat_id));
+            assert!(alice2.list_chats().unwrap().contains(&chat_id));
-            assert!(!alice2.chats.contains_key(&chat_id));
 
             // Send another message - this will load the chat and advance ratchet
             let result = alice2.send_message(&chat_id, b"Message 4");
             assert!(result.is_ok(), "Should be able to send after restore");
-
-            // Chat should now be in memory
-            assert!(alice2.chats.contains_key(&chat_id));
         }
     }
 
     #[test]
     fn test_full_message_roundtrip() {
-        let mut alice = ChatManager::in_memory().unwrap();
+        use tempfile::tempdir;
-        let mut bob = ChatManager::in_memory().unwrap();
+
+        // Use temp files instead of in-memory for proper storage sharing
+        let dir = tempdir().unwrap();
+        let alice_db = dir.path().join("alice.db");
+        let bob_db = dir.path().join("bob.db");
+
+        let mut alice =
+            ChatManager::open(StorageConfig::File(alice_db.to_str().unwrap().to_string())).unwrap();
+        let mut bob =
+            ChatManager::open(StorageConfig::File(bob_db.to_str().unwrap().to_string())).unwrap();
 
         // Bob creates an intro bundle and shares it with Alice
         let bob_intro = bob.create_intro_bundle().unwrap();
 
         // Alice starts a chat with Bob and sends "Hello!"
-        let (alice_chat_id, envelopes) = alice
+        let (alice_chat_id, envelopes) =
-            .start_private_chat(&bob_intro, "Hello Bob!")
+            alice.start_private_chat(&bob_intro, "Hello Bob!").unwrap();
-            .unwrap();
 
         // Verify Alice has the chat
         assert!(alice.chat_exists(&alice_chat_id).unwrap());
-        assert_eq!(alice.list_chats().len(), 1);
+        assert_eq!(alice.list_chats().unwrap().len(), 1);
 
         // Simulate network delivery: Bob receives the envelope
         let envelope = envelopes.first().unwrap();
@@ -531,8 +498,8 @@ mod tests {
         assert_eq!(content.data, b"Hello Bob!");
 
         // Bob should now have a chat
-        assert_eq!(bob.list_chats().len(), 1);
+        assert_eq!(bob.list_chats().unwrap().len(), 1);
-        let bob_chat_id = bob.list_chats().first().unwrap().clone();
+        let bob_chat_id = bob.list_chats().unwrap().first().unwrap().clone();
 
         // Bob replies to Alice
         let bob_reply_envelopes = bob.send_message(&bob_chat_id, b"Hi Alice!").unwrap();
@@ -553,7 +520,9 @@ mod tests {
         assert_eq!(bob_received.data, b"How are you?");
 
         // Bob replies again
-        let bob_envelopes = bob.send_message(&bob_chat_id, b"I'm good, thanks!").unwrap();
+        let bob_envelopes = bob
+            .send_message(&bob_chat_id, b"I'm good, thanks!")
+            .unwrap();
         let bob_msg = bob_envelopes.first().unwrap();
         let alice_received2 = alice.handle_incoming(&bob_msg.data).unwrap();
 
@@ -574,10 +543,9 @@ mod tests {
 
         // Phase 1: Establish chat
         {
-            let mut alice = ChatManager::open(StorageConfig::File(
+            let mut alice =
-                alice_db.to_str().unwrap().to_string(),
+                ChatManager::open(StorageConfig::File(alice_db.to_str().unwrap().to_string()))
-            ))
+                    .unwrap();
-            .unwrap();
             let mut bob =
                 ChatManager::open(StorageConfig::File(bob_db.to_str().unwrap().to_string()))
                     .unwrap();
@@ -590,26 +558,27 @@ mod tests {
             let envelope = envelopes.first().unwrap();
             let content = bob.handle_incoming(&envelope.data).unwrap();
             assert_eq!(content.data, b"Initial");
-            bob_chat_id = bob.list_chats().first().unwrap().clone();
+            bob_chat_id = bob.list_chats().unwrap().first().unwrap().clone();
         }
         // Both dropped - simulates app restart
 
         // Phase 2: Continue conversation after restart
         {
-            let mut alice = ChatManager::open(StorageConfig::File(
+            let mut alice =
-                alice_db.to_str().unwrap().to_string(),
+                ChatManager::open(StorageConfig::File(alice_db.to_str().unwrap().to_string()))
-            ))
+                    .unwrap();
-            .unwrap();
             let mut bob =
                 ChatManager::open(StorageConfig::File(bob_db.to_str().unwrap().to_string()))
                     .unwrap();
 
             // Both should have persisted chats
-            assert!(alice.list_stored_chats().unwrap().contains(&alice_chat_id));
+            assert!(alice.list_chats().unwrap().contains(&alice_chat_id));
-            assert!(bob.list_stored_chats().unwrap().contains(&bob_chat_id));
+            assert!(bob.list_chats().unwrap().contains(&bob_chat_id));
 
             // Alice sends a message (chat loads from storage)
-            let envelopes = alice.send_message(&alice_chat_id, b"After restart").unwrap();
+            let envelopes = alice
+                .send_message(&alice_chat_id, b"After restart")
+                .unwrap();
 
             // Bob receives (chat loads from storage)
             let envelope = envelopes.first().unwrap();