veilidchat/lib/tools/table_db.dart

import 'package:veilid/veilid.dart';

Future<T> tableScope<T>(
    String name, Future<T> Function(VeilidTableDB tdb) callback,
    {int columnCount = 1}) async {
  VeilidTableDB tableDB = await Veilid.instance.openTableDB(name, columnCount);
  try {
    return await callback(tableDB);
  } finally {
    tableDB.close();
  }
}

Future<T> transactionScope<T>(
  VeilidTableDB tdb,
  Future<T> Function(VeilidTableDBTransaction tdbt) callback,
) async {
  VeilidTableDBTransaction tdbt = tdb.transact();
  try {
    final ret = await callback(tdbt);
    if (!tdbt.isDone()) {
      await tdbt.commit();
    }
    return ret;
  } finally {
    if (!tdbt.isDone()) {
      await tdbt.rollback();
    }
  }
}