Net::ACME::Challenge::Pending - base class for an unhandled challenge
This base class encapsulates behavior to respond to unhandled challenges. To work with challenges that have been handled (successfully or not), see
Note that HTTP requests have some “helper” logic in the subclass
JWK_HR is a hashref representation of the ACME registration key’s public JWK.
Returns a string to use as key authorization for the challenge.