Enum ChallengeOutcome 

pub enum ChallengeOutcome {
    Approved,
    Pending {
        status_message: String,
        remaining_tries: u8,
        remaining_time_secs: u32,
        next_state: ChallengeState,
    },
    Denied(String),
}

Outcome returned by ChallengeHandler::verify.

Variants

Approved

Challenge passed — proceed to issue the certificate.

Pending

Challenge requires another round (e.g. email: code was sent, awaiting submission).

The CA returns this with updated state; the client submits another CHALLENGE request with the next parameters.

Fields

status_message: String

Human-readable status for the client (e.g. “Code sent to user@example.com”).

remaining_tries: u8

How many more attempts the client may make before the request is rejected.

remaining_time_secs: u32

Seconds remaining before the challenge expires.

next_state: ChallengeState

Updated challenge state to store for the next round.

Denied(String)

Challenge failed — reject the request with this reason.