Custom database doesn't work on Android

[feinstein]

The InitConfig class says:

/// Custom database binary.
///
/// Android only. For iOS use [databasePath].
ByteData? customDb;

But this code doesn't work:

final license = await rootBundle.load('assets/regula.license');
final initConfig = InitConfig(license);
initConfig.customDb = await rootBundle.load('assets/db.dat');
final (success, error) = await DocumentReader.instance.initializeReader(initConfig);

I can see that initConfig.customDb is not null, it has byte data there, but I get an initialisation error.

The docs say:

var config = InitConfig(license);

// iOS
config.databasePath = "db.dat";

// Android
//Place db.dat in the path below
var customDbPath = "/storage/emulated/0/Android/data/com.regula.documentreader/folder/";
config.databasePath = customDbPath;

Which conflicts with the source code.

So which approach is the correct one?

[feinstein]

I tried to copy the db.dat into a folder and give that to the lib, but I still get the same error:

      final tempDir = await getTemporaryDirectory();
      // write the db.dat asset into the temp dir
      final dbPath = '${tempDir.path}/db.dat';
      final dbFile = File(dbPath);
      final dbBytes = await rootBundle.load(Assets.regula.db);
      dbFile.writeAsBytesSync(dbBytes.buffer.asUint8List());

      initConfig.databasePath = dbPath;

[feinstein]

I also tried to call await DocumentReader.instance.removeDatabase(); before initialising the lib.