Enum ChallengeError 

pub enum ChallengeError {
    Connection(String),
    Dns(String),
    IncorrectResponse(String),
    Tls(String),
    Unauthorized(String),
    Internal(String),
}

Why a validation failed, mapped by the caller to the right ACME error.

The split mirrors Verdict: a statement about the client’s setup is not the same as the server being unable to reach a verdict at all.

Variants

Connection(String)

The validation target could not be reached: TCP refused, no route, a redirect chain that never ended, the attempt timing out.

Dns(String)

A DNS query the challenge needed failed or returned nothing.

IncorrectResponse(String)

The target answered, but not with what the challenge requires — a TXT record that does not match, a certificate missing the expected extension.

Tls(String)

A TLS-level failure during a tls-alpn-01 handshake.

Unauthorized(String)

The target served something that is not the key authorization. RFC 8555 §8.3 uses this type for exactly that case.

Internal(String)

The validator itself failed — a bug, or a type with no validator behind it. The client may retry.

Implementations

impl ChallengeError

pub fn kind(&self) -> &'static str

Short label for logs.

pub fn detail(&self) -> &str

The human-readable detail, shown to the client.

Trait Implementations

impl Debug for ChallengeError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.