private async Task <TaskResult> DoSingle(IPacketWriter writer)
{
var p = await writer.ImposeAsync();
if (p == null)
{
return(TaskResult.LostConnection);
}
if (p.HasError)
{
// Đóng băng.
return(TaskResult.CanBeDone);
}
// Không làm tăng cường thu thuế.
return(TaskResult.Done);
}