AppConfiguration - encryptionKey

[sync-by-unito]

See #406

Similar to Realm Java we need to expose AppConfiguration.Builder.encryptionKey() which makes it possible to encrypt the metadata Realm used by Sync.

[sync-by-unito]

➤ Christan Melchior commented:

This is called realm_sync_client_config_set_metadata_encryption_key in the C-API.
It is also currently disabled in the SWIG file realm.i.

[rorbech]

Seems to be implemented in core by now ... https://github.com/realm/realm-core/blob/5cb3a7a505614550ae1a43d9fd7de9d881287e6c/src/realm/object-store/c_api/sync.cpp#L303, so could just remove it from the ignored list.