void transaction(SqlTransactionCallback callback(SqlTransaction transaction), [SqlTransactionErrorCallback errorCallback(SqlError error), VoidCallback successCallback()])

Source 

void transaction(SqlTransactionCallback callback, [SqlTransactionErrorCallback errorCallback, VoidCallback successCallback]) {
  if (successCallback != null) {
    _blink.BlinkDatabase.instance.transaction_Callback_3_(unwrap_jso(this), unwrap_jso((transaction) => callback(wrap_jso(transaction))), unwrap_jso((error) => errorCallback(wrap_jso(error))), unwrap_jso(() => successCallback()));
    return;
  }
  if (errorCallback != null) {
    _blink.BlinkDatabase.instance.transaction_Callback_2_(unwrap_jso(this), unwrap_jso((transaction) => callback(wrap_jso(transaction))), unwrap_jso((error) => errorCallback(wrap_jso(error))));
    return;
  }
  _blink.BlinkDatabase.instance.transaction_Callback_1_(unwrap_jso(this), unwrap_jso((transaction) => callback(wrap_jso(transaction))));
  return;
}