await Stream.pipeTo(source, writer);
Once a transaction is confirmed, it is placed in a block after the confirmation. All of the blocks are chained together to create a permanent history of every transaction.，这一点在服务器推荐中也有详细论述
，推荐阅读雷电模拟器官方版本下载获取更多信息
The 'magical' blue flower changing farmers' fortunes in India，详情可参考heLLoword翻译官方下载
// Synchronous source from in-memory data