If for any reason the PKSA fails to process the challenge request, it can send an error message to the HAS that will forward it to the APP. The same applies if the error is generated by the HAS.

In both cases, the APP will receive the following message:


    cmd: "challenge_err",
    uuid: string,
    error: string
  • uuid: the transaction request identifier

  • error: an error message encrypted with the auth_key

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