THPDFCSCTransportStatus Type

THPDFCSCTransportStatus =
  (ctsSuccess, ctsTemporaryFailure, ctsPermanentFailure, ctsCancelled);

暫時性失敗只能在冪等邊界上重試，永久性失敗立刻停止，取消則直接對應到 spsCancelled

CSC 遠端簽章提供者