fixes issue with messsages not received

.gitignore

@@ -15,6 +15,9 @@
 *.sqlite-wal
 migrate_working_dir/
 
+fastlane/report.xml
+fastlane/README.md
+
 # IntelliJ related
 *.iml
 *.ipr

CHANGELOG.md

@@ -1,6 +1,6 @@
 # Changelog
 
-## 0.2.18
+## 0.2.20
 
 - New: Adds an "Ask a Friend" button to new contact suggestions.
 - New: Adds security profiles.

lib/src/services/api/client2client/contact.c2c.dart

@@ -28,7 +28,6 @@ Future<bool> handleNewContactRequest(int fromUserId) async {
         await handleContactAccept(fromUserId);
       }
 
-      // contact was already accepted, so just accept the request in the background.
       await sendCipherText(
         contact.userId,
         EncryptedContent(
@@ -36,6 +35,7 @@ Future<bool> handleNewContactRequest(int fromUserId) async {
             type: EncryptedContent_ContactRequest_Type.ACCEPT,
           ),
         ),
+        blocking: false,
       );
       return true;
     }
@@ -238,6 +238,7 @@ Future<int?> checkForProfileUpdate(
                 type: EncryptedContent_ContactUpdate_Type.REQUEST,
               ),
             ),
+            blocking: false,
           );
         }
       }

lib/src/services/api/client2client/groups.c2c.dart

@@ -17,9 +17,7 @@ Future<void> handleGroupCreate(
   EncryptedContent_GroupCreate newGroup,
   String receiptId,
 ) async {
-  final user = await twonlyDB.contactsDao
-      .getContactByUserId(fromUserId)
-      .getSingleOrNull();
+  final user = await twonlyDB.contactsDao.getContactByUserId(fromUserId).getSingleOrNull();
   if (user == null) {
     // Only contacts can invite other contacts, so this can (via the UI) not happen.
     Log.error(
@@ -229,6 +227,7 @@ Future<void> handleResendGroupPublicKey(
         groupPublicKey: keyPair.getPublicKey().serialize(),
       ),
     ),
+    blocking: false,
   );
 }
 

lib/src/services/api/client2client/user_discovery.c2c.dart

@@ -17,6 +17,7 @@ Future<void> checkForUserDiscoveryChanges(
   List<int> receivedVersion,
   String receiptId,
 ) async {
+  Log.info('[$receiptId] Checking for a new user discovery version.');
   final currentVersion = await UserDiscoveryService.shouldRequestNewMessages(
     fromUserId,
     receivedVersion,
@@ -36,6 +37,7 @@ Future<void> checkForUserDiscoveryChanges(
           currentVersion: currentVersion.toList(),
         ),
       ),
+      blocking: false,
     );
   }
 }
@@ -73,6 +75,7 @@ Future<void> handleUserDiscoveryRequest(
           messages: newMessages,
         ),
       ),
+      blocking: false,
     );
   } else {
     Log.info('[$receiptId] Got update request, but there are no new updates for the user');

lib/src/services/api/messages.api.dart

@@ -566,5 +566,5 @@ Future<void> sendContactMyProfileData(int contactId) async {
       username: userService.currentUser.username,
     ),
   );
-  await sendCipherText(contactId, encryptedContent);
+  await sendCipherText(contactId, encryptedContent, blocking: false);
 }

lib/src/services/api/server_messages.api.dart

@@ -86,8 +86,18 @@ Future<void> handleClient2ClientMessage(NewMessage newMessage) async {
   final receiptId = message.receiptId;
 
   final mutex = _messageLocks.putIfAbsent(receiptId, Mutex.new);
+  if (mutex.isLocked) {
+    Log.info(
+      '[$receiptId] Skipping — already being processed by another handler',
+    );
+    return;
+  }
   await mutex.protect(() async {
-    await _handleClient2ClientMessage(newMessage, message);
+    try {
+      await _handleClient2ClientMessage(newMessage, message);
+    } finally {
+      _messageLocks.remove(receiptId);
+    }
   });
 }
 
@@ -143,7 +153,7 @@ Future<void> _handleClient2ClientMessage(
         Log.info(
           '[$receiptId] Sending error message to the original sender with receiptId $newReceiptId.',
         );
-        await tryToSendCompleteMessage(receiptId: newReceiptId);
+        await tryToSendCompleteMessage(receiptId: newReceiptId, blocking: false);
       }
 
     case Message_Type.CIPHERTEXT:
@@ -216,7 +226,7 @@ Future<void> _handleClient2ClientMessage(
         } catch (e) {
           Log.warn('[$receiptId] Error inserting receipt: $e');
         }
-        await tryToSendCompleteMessage(receiptId: receiptId);
+        await tryToSendCompleteMessage(receiptId: receiptId, blocking: false);
       }
     case Message_Type.TEST_NOTIFICATION:
       break;

lib/src/services/user_discovery.service.dart

@@ -104,7 +104,8 @@ class UserDiscoveryService {
 
   static Future<Uint8List?> getCurrentVersion() async {
     try {
-      return await FlutterUserDiscovery.getCurrentVersion();
+      return await FlutterUserDiscovery.getCurrentVersion()
+          .timeout(const Duration(seconds: 5));
     } catch (e) {
       Log.error(e);
       return null;
@@ -140,7 +141,7 @@ class UserDiscoveryService {
       return await FlutterUserDiscovery.shouldRequestNewMessages(
         contactId: fromUserId,
         version: receivedVersion,
-      );
+      ).timeout(const Duration(seconds: 5));
     } catch (e) {
       Log.error(e);
       return null;
@@ -155,7 +156,7 @@ class UserDiscoveryService {
       return await FlutterUserDiscovery.getNewMessages(
         contactId: fromUserId,
         receivedVersion: receivedVersion,
-      );
+      ).timeout(const Duration(seconds: 5));
     } catch (e) {
       Log.error(e);
       return null;
@@ -175,7 +176,7 @@ class UserDiscoveryService {
         messages: messages,
         publicKeyVerifiedTimestamp:
             verifications.lastOrNull?.createdAt.millisecondsSinceEpoch,
-      );
+      ).timeout(const Duration(seconds: 5));
     } catch (e) {
       Log.error(e);
     }

pubspec.yaml

@@ -3,7 +3,7 @@ description: "twonly, a privacy-friendly way to connect with friends through sec
 
 publish_to: 'none'
 
-version: 0.2.17+126
+version: 0.2.19+128
 
 environment:
   sdk: ^3.11.0

rust_dependencies/protocols/src/user_discovery/mod.rs

@@ -10,7 +10,7 @@ use std::u8;
 use blahaj::{Share, Sharks};
 use prost::Message;
 use serde::{Deserialize, Serialize};
-use tokio::sync::{Mutex, MutexGuard};
+use tokio::sync::Mutex;
 use crate::user_discovery::error::{Result, UserDiscoveryError};
 use crate::user_discovery::traits::{AnnouncedUser, OtherPromotion, UserDiscoveryUtils};
 use crate::user_discovery::user_discovery_message::{UserDiscoveryAnnouncement, UserDiscoveryPromotion};
@@ -56,7 +56,7 @@ where
 {
     store: Store,
     utils: Utils,
-    config_lock: Arc<Mutex<bool>>,
+    config_lock: Arc<Mutex<()>>,
 }
 
 impl<Store: UserDiscoveryStore, Utils: UserDiscoveryUtils> UserDiscovery<Store, Utils> {
@@ -101,6 +101,7 @@ impl<Store: UserDiscoveryStore, Utils: UserDiscoveryUtils> UserDiscovery<Store,
             Err(_) => UserDiscoveryConfig {
                 threshold,
                 user_id,
+                total_number_of_shares: 255,
                 ..Default::default()
             },
         };
@@ -126,24 +127,27 @@ impl<Store: UserDiscoveryStore, Utils: UserDiscoveryUtils> UserDiscovery<Store,
         debug_assert_eq!(verification_shares.len(), threshold as usize - 1);
 
         tracing::info!("Protocols: updating config in store");
-        
-        let config_lock = self.config_lock.lock().await;
-        let mut final_config = match self.store.get_config().await {
-            Ok(c) => serde_json::from_str(&c)?,
-            Err(_) => UserDiscoveryConfig {
-                threshold,
-                user_id,
-                ..Default::default()
-            },
-        };
 
-        final_config.public_id = public_id;
-        final_config.announcement_version += 1;
-        final_config.verification_shares = verification_shares;
-        final_config.share_promotion = share_promotion;
-        final_config.threshold = threshold;
+        {
+            let mut final_config = match self.store.get_config().await {
+                Ok(c) => serde_json::from_str(&c)?,
+                Err(_) => UserDiscoveryConfig {
+                    threshold,
+                    user_id,
+                    ..Default::default()
+                },
+            };
 
-        self.update_config(final_config, config_lock).await?;
+            final_config.public_id = public_id;
+            final_config.announcement_version += 1;
+            final_config.verification_shares = verification_shares;
+            final_config.share_promotion = share_promotion;
+            final_config.threshold = threshold;
+
+            self.store
+                .update_config(serde_json::to_string_pretty(&final_config)?)
+                .await?;
+        }
 
         tracing::info!("Protocols: initialize_or_update finished");
         Ok(())
@@ -164,7 +168,7 @@ impl<Store: UserDiscoveryStore, Utils: UserDiscoveryUtils> UserDiscovery<Store,
     /// * `Err(UserDiscoveryError)` - If there where errors in the store.
     ///
     pub async fn get_current_version(&self) -> Result<Vec<u8>> {
-        let (config, _) = self.get_config().await?;
+        let config = self.get_config_snapshot().await?;
         Ok(UserDiscoveryVersion {
             announcement: config.announcement_version,
             promotion: config.promotion_version,
@@ -207,7 +211,7 @@ impl<Store: UserDiscoveryStore, Utils: UserDiscoveryUtils> UserDiscovery<Store,
         let mut messages = vec![];
         let received_version = UserDiscoveryVersion::decode(received_version)?;
 
-        let (config, _) = self.get_config().await?;
+        let config = self.get_config_snapshot().await?;
         let version = Some(UserDiscoveryVersion {
             announcement: config.announcement_version,
             promotion: config.promotion_version,
@@ -361,9 +365,6 @@ impl<Store: UserDiscoveryStore, Utils: UserDiscoveryUtils> UserDiscovery<Store,
         contact_id: UserID,
         public_key_verified_timestamp: Option<i64>,
     ) -> Result<()> {
-        let (mut config, config_lock) = self.get_config().await?;
-        config.promotion_version += 1;
-
         let Some(current_promotion) = self.store.get_contact_promotion(contact_id).await? else {
             // User does not participate...
             return Ok(());
@@ -376,10 +377,19 @@ impl<Store: UserDiscoveryStore, Utils: UserDiscoveryUtils> UserDiscovery<Store,
             return Ok(());
         };
 
+        // Read-modify-write the config to get the new promotion_version
+        let mut new_promotion_version = 0u32;
+        let mut announcement_version = 0u32;
+        self.read_modify_write_config(|config| {
+            config.promotion_version += 1;
+            new_promotion_version = config.promotion_version;
+            announcement_version = config.announcement_version;
+        }).await?;
+
         let message = UserDiscoveryMessage {
             version: Some(UserDiscoveryVersion {
-                announcement: config.announcement_version,
-                promotion: config.promotion_version,
+                announcement: announcement_version,
+                promotion: new_promotion_version,
             }),
             user_discovery_promotion: Some(UserDiscoveryPromotion {
                 promotion_id: rand::random(),
@@ -394,13 +404,11 @@ impl<Store: UserDiscoveryStore, Utils: UserDiscoveryUtils> UserDiscovery<Store,
         self.store
             .push_own_promotion_and_clear_old_version(
                 contact_id,
-                config.promotion_version,
+                new_promotion_version,
                 message.encode_to_vec(),
             )
             .await?;
 
-        self.update_config(config, config_lock).await?;
-
         Ok(())
     }
 
@@ -455,21 +463,31 @@ impl<Store: UserDiscoveryStore, Utils: UserDiscoveryUtils> UserDiscovery<Store,
         Ok(verification_shares)
     }
 
-    async fn get_config(&self) -> Result<(UserDiscoveryConfig, MutexGuard<'_, bool>)> {
-        let mut lock = self.config_lock.lock().await;
-        *lock = true;
-        Ok((serde_json::from_str(&self.store.get_config().await?)?, lock))
+    /// Reads the config from the store without holding any lock.
+    /// Use this for read-only access to the config.
+    async fn get_config_snapshot(&self) -> Result<UserDiscoveryConfig> {
+        Ok(serde_json::from_str(&self.store.get_config().await?)?)
     }
 
-    async fn update_config(
-        &self,
-        config: UserDiscoveryConfig,
-        mut config_lock: MutexGuard<'_, bool>,
-    ) -> Result<()> {
+    /// Atomically reads the config, applies the mutation, and writes it back.
+    /// The config_lock is only held during the read-modify-write cycle,
+    /// NOT across any async Dart callbacks from the caller.
+    async fn read_modify_write_config<F>(&self, mutate: F) -> Result<()>
+    where
+        F: FnOnce(&mut UserDiscoveryConfig),
+    {
+        let _lock = tokio::time::timeout(
+            std::time::Duration::from_secs(10),
+            self.config_lock.lock(),
+        )
+        .await
+        .ok();
+        let mut config: UserDiscoveryConfig =
+            serde_json::from_str(&self.store.get_config().await?)?;
+        mutate(&mut config);
         self.store
             .update_config(serde_json::to_string_pretty(&config)?)
             .await?;
-        *config_lock = false;
         Ok(())
     }
 
@@ -542,13 +560,19 @@ impl<Store: UserDiscoveryStore, Utils: UserDiscoveryUtils> UserDiscovery<Store,
 
                 // Only add this user to the promotions if the users enabled this feature
                 if uda.share_promotion {
-                    let (mut config, config_lock) = self.get_config().await?;
-                    config.promotion_version += 1;
+                    // Read-modify-write the config to get the new promotion_version
+                    let mut new_promotion_version = 0u32;
+                    let mut announcement_version = 0u32;
+                    self.read_modify_write_config(|config| {
+                        config.promotion_version += 1;
+                        new_promotion_version = config.promotion_version;
+                        announcement_version = config.announcement_version;
+                    }).await?;
 
                     let message = UserDiscoveryMessage {
                         version: Some(UserDiscoveryVersion {
-                            announcement: config.announcement_version,
-                            promotion: config.promotion_version,
+                            announcement: announcement_version,
+                            promotion: new_promotion_version,
                         }),
                         user_discovery_promotion: Some(UserDiscoveryPromotion {
                             promotion_id: rand::random(),
@@ -563,12 +587,10 @@ impl<Store: UserDiscoveryStore, Utils: UserDiscoveryUtils> UserDiscovery<Store,
                     self.store
                         .push_own_promotion_and_clear_old_version(
                             contact_id,
-                            config.promotion_version,
+                            new_promotion_version,
                             message.encode_to_vec(),
                         )
                         .await?;
-
-                    self.update_config(config, config_lock).await?;
                 }
 
                 let announced_user = AnnouncedUser {
@@ -722,7 +744,7 @@ impl<Store: UserDiscoveryStore, Utils: UserDiscoveryUtils> UserDiscovery<Store,
                         public_id: udp.public_id,
                     };
 
-                    let (config, _) = self.get_config().await?;
+                    let config = self.get_config_snapshot().await?;
 
                     let user_id = config.user_id;
                     for promotion in unique_promotions {
@@ -758,7 +780,7 @@ impl Default for UserDiscoveryConfig {
     fn default() -> Self {
         Self {
             threshold: 2,
-            total_number_of_shares: u8::MAX,
+            total_number_of_shares: 255,
             announcement_version: 0,
             promotion_version: 0,
             verification_shares: vec![],
@@ -768,3 +790,4 @@ impl Default for UserDiscoveryConfig {
         }
     }
 }
+