# RelayMiddleman Module — vsmartcard 2021-04-28 documentation

# RelayMiddleman Module

class `virtualsmartcard.cards.RelayMiddleman.``RelayMiddleman`

  Bases: `object`

  The RelayMiddleman class serves as a base from which a user might derive their own relay middle man class. This base class implements the simplest Man-in-the-Middle: the NoOp.

  `handleInPDU`(inPDU: bytes)

    This method is called on each PDU that is fed into the realy (vdpu -> vicc). It may be overwritten to modify the packages send from the terminal to the real smart card.

  `handleOutPDU`(outPDU: bytes)

    This method is called on each PDU that is produced by the relay (vicc -> vdpu). It may be overwritten to modify the packages send from the real smart card to the terminal.