`Ditto.version` class property providing access to the semantic version of the SDK. (#10223)

Class `DittoQueryResultItem` representing a single match of a DQL query. (#10319, #10394)

Class `DittoQueryResult` representing the result of executing a DQL query. (#10319, #10394)

Method `execute()` on `DittoStore` that executes a DQL query and returns a `DittoQueryResult` containig `DittoQueryResultItem`s for each match. (#10319, #10394)

Class `DittoSyncSubscription` that configures Ditto to receive updates from remote peers about documents matching the subscription's query. It's a DQL counterpart and successor to the old `Subscription` class. (#10395, #10394)

Method `registerSubscription()` on `DittoSync` that installs and returns a `SyncSubscription`. (#10395, #10394)

Property `subscriptions` on `DittoSync` providing access to all currently active sync subscriptions. (#10395, #10394)

Property `sync` on `Ditto` of type `DittoSync` to serve as an entry point for sync functionality. (#10395, #10394)

Class `DittoStoreObserver` on `DittoStore` that configures Ditto to invoke an observation handler whenever results for its query change. (#10396, #10394)

Method `registerObserver()` on `DittoStore` that installs and returns a `DittoStoreObserver`. (#10396, #10394)

Property `observers` on `DittoStore` providing access to all currently active store observers. (#10396, #10394)

Deprecated: `DittoLANConfig.isMulticastEnabled` property.. (#10126)- Changed: Ditto SDK is built and tested with Xcode 14.3.1. (#10177)

This version of Ditto drops support for iOS 13 and earlier. All devices that support iOS 13 also support iOS 14 and iOS 15. (#9842)

Performance by implementing bipartite distance-aware mesh topology. (#10632)

Memory usage and performance of Documents. (#10736)

Reduced metadata accumulation after eviction by clearing remote summaries. (#7065)

Serialization performance. (#9112)

Made logging more robust to failed writes in a specific set of circumstances. (#10077)

Addressed a warning from SQLite that sometimes occurs on startup about a schema change. (#10501)

Presence graph may not show all active connections. (#10507)

When observing peers, isConnectedToDittoCloud property may be incorrect. (#10534)

Initial logging events now use the same format as all other logs. (#10611)

Mesh could choose random connections. (#10711)

A bug with Ditto's internal crash handler. (#10022)

SDK version/language/platform and device name are now included in the small peer info document. (#10515)

Runtime validation of corrupted attachments being inserted into documents (#10552)

An issue introduced in 4.4.2 where the Small Peer Info attachments were not replicated to the Portal. (#10538)

Changed: Made `DittoAttachmentToken` conform to `Hashable`. (#10195)

Small Peer info collection now defaults to localPeerOnly, preventing data from being collected on the Big Peer until the feature is explicitly enabled and sync scope is set to bigPeerOnly. (#10203, #10204)

Property smallPeerInfo to Ditto allowing to configure the collection and sync of small peer info. (#9560)

More informative log message for query failures caused by database access errors. (#9364)

Small peers now persist structured log data to disk for later retrieval, with limits on the resulting disk usage. (#9547)

Print some internal errors in a more human-readable format. (#9269)

TransportConfig and its associated types can be serialized/deserialized into/from JSON and CBOR. (#9585)

Sets a minimum session refresh period. The small peer will always try to start refreshing its session after 3 days no matter how long the session period issue. Previously the small peer would start to refresh after half of the session length had elapsed. (#9594, #9645)

Initial replication time by reducing one roundtrip of messages before peers can sync. (#9404)

Attachment fetch time in several edge case scenarios. (#9501)

Efficiency by using less system resources when connected to peers but no replication changes are needing to be sent. (#9479, #7995)

Significantly reduced startup resource consumption linked to total document count. (#9501)

A small memory leak each time ditto.auth.login(token:provider:completion:) was called. (#9695)

Warning "Failed to clean up attachment fetcher. Token not found" that could occur during normal operation. (#9639)

A scenario where a peer could incorrectly receive data back from other peers even after they had modified their subscription and evicted the old data. (#9404)

An issue where unusually high replication write load in large meshes could block all readers from reading the database. (#9395, #8872)

Changed: Improved clarity of error messages when data on disk cannot be read by this version following a downgrade from a newer version of Ditto. (#9267)

Changed: Print some internal errors in a more human-readable format. (#9495)

Added: iOS can now connect to servers with custom certificates. (#9368)

Added: Optional customAuthURL parameter to the DittoIdentity.onlinePlayground enum case. (#9131)

Added: An internal ability to measure & report the level of redundancy in replication updates to calculate the percentage of updates that are arriving from multiple peers. This will be used for future self-balancing mesh actions which are not yet enabled. (#8937)

Changed: new serialization format improves efficiency of replication, particularly in the Big Peer. (#8946)

Changed: Better logging for diagnosing auth failures. (#8984)

Changed: Improved replication performance by introducing a small internal caching layer for commonly computed values. (#8777)

Fixed: The replication engine can now recover from certain filesystem corruption issues during sync instead of panicking. (#8965)

Fixed: Increased validation of document updates, preventing updates that try to modify the document id. (#9063)

Fixed: Problems connecting to the Ditto Cloud using

Improved mesh performance when using 50+ Small Peer devices (#9077)

Changed: Improved deserialization performance of Documents. (#9123)

Fixed: Increased validation of document updates, preventing updates that try to modify the document id. (#9129)

Fixed: Removed outdated ERROR level log statements in Ditto store related to

Fixed: The UpdateDifferentValues write strategy was incorrectly skipping non-alphanumeric document properties. (#9165)

Fixed: a potential crash if a document attachment was malformed (#9045)

Fixed: AWDL sync when certain special characters are present in device name (#9010, #9152)

Fixed: Possible crash in AWDL transport in large meshes (#9143)

Fixed: a possible crash due to serialisation when upgrading from version 4.1.0 or 4.1.1 (#8925)

Added: Experimental support for disk encryption. This API is experimental for the time being and is likely to change in the next couple of releases. (#8847)

Added: login method that provides an extra String? argument (as compared to loginWithToken) that will be non-nil if the auth webhook provided any clientInfo JSON value. The String will be a JSON encoded string. (#8787)

Changed: the existing loginWithToken is marked as deprecated. (#8787)

Changed: Improved replication uses compressed message stream to decrease bandwidth consumption. (#8807)

Changed: Reduce verbosity in replication logs (#8370)

Fixed: a crash when using the typed(as:) API with a type that contains an optional array. (#8855)

Fixed: Devices with hostnames longer than 35 bytes will no longer fail to sync over LAN.

Added: dSYMs are now bundled inside the XCFramework to improve crash report symbolication.

Changed: The dSYMs directory has been removed from the root directory of the CocoaPods artifact since it's no longer required now that dSYMs are bundled inside XCFreameworks.

Added: Disabled replication state. When the Big Peer receives a query that is too big to be satisfied, it will explicitly disable replication with the remote peer, and send a message informing the remote peer that replication is disabled. This is in contrast to the previous behavior, where the Big Peer simply did not respond to the query.

Changed: now including NSNetServicesErrorCode and Domain in AWDL connect log messages

Changed: Ditto instances cannot be closed/deallocated from within a live query callback closure otherwise this can lead to a deadlock.

Changed: (Experimental) Query Overlap Groups, Bus: a breaking protocol change for upcoming improvements. Peers using older versions will not be able to connect with newer peers until they upgrade.

Fixed: A replication issue where certain cases that should have reset the replication session with a remote peer would instead temporarily terminate the connection while not resetting the session.

Fixed: A replication issue that could cause failed convergence on small number of documents if updates are being received during a local eviction.

Security: Enforce immediate disconnection of any connected peers whose certificate expires during a sync session.

Improvements to Bluetooth connection reliability on Linux

Fixed: a replication issue that could cause failed convergence on small number of documents if updates are being received during a local eviction.

Improvements to Bluetooth connection reliability on Linux

Fixed: A replication issue where certain cases that should have reset the replication session with a remote peer would instead temporarily terminate the connection while not resetting the session.

Fixed: Correct handling of reset and disable errors from receive_update

Fixed: Resolved an issue with logging when the stdout is not available.

Added: AddWins removes will now be used if

Changed: If a problem occurs with an app's authentication webhook, the Small Peer that is trying to authenticate will log more detailed information for the developer.

Changed: old multihop connections are now automatically disconnected when direct connections are established with peers, freeing up unneeded resources faster.

Changed: reduced severity level for some routine log statements which were previously emitted at a WARN level.

Fixed: some threads spawned by the SDK no longer wait up to 30 seconds before being stopped.

Fixed: an issue which could cause Ditto to hang if more than 500 peers were encountered.

Fixed: replication hanging under some circumstances, especially WebSocket connections to Big Peer

Fixed: a possible crash if Ditto is configured with an invalid App ID. An error message is emitted instead.

Fixed: an issue preventing clean Ditto shutdown.

Fixed: cancelling subscriptions for queries with args would not work, the subscription would remain active indefinitely.

Fixed: some memory leaks.

Fixed: using the DittoBus no longer leads to Ditto instances not being deallocated properly.

Fixed: an issue which could cause Ditto to hang if more than 500 peers were encountered.

Fixed: an issue preventing clean Ditto shutdown.

Fixed: AddWins removes will now be used if disableSyncWithV3 has been called on the Ditto object or the a peer has synced with another peer that has called disableSyncWithV3, or they have synced with another peer that has called disableSyncWithV3, etc.

Added: disableSyncWithV3 functionality to Ditto. Calling this will permanently remove the ability for the device that it is called on to sync with devices running v3 of the SDK. It also means that the device will then start performing AddWins removes when calling remove(). Any other device running v4 of the SDK that syncs with a device that has called disableSyncWithV3 (or has themselves synced with another device that has called disableSyncWithV3, etc - if any chain of syncing exists that involves a device that has called disableSyncWithV3) will also no longer be able to sync with v3 peers and will perform AddWins removes when calling remove().