Enum UcanError 

pub enum UcanError {
    InvalidToken,
    InvalidSignature,
    InvalidPublicKey,
    Expired,
    NotYetValid,
    NoToken,
}

Errors from token creation, decoding, or verification.

Variants

InvalidToken

Not a well-formed header.payload.signature triple, or a part isn’t valid base64url/JSON — mirrors macula_ucan_nif’s {error, invalid_token}.

InvalidSignature

The token parsed fine but its signature does not verify against the given public key — mirrors {error, invalid_signature}.

InvalidPublicKey

The supplied public key isn’t a 32-byte Ed25519 key — mirrors {error, invalid_public_key}.

Expired

The token’s exp claim is in the past — mirrors {error, expired}.

NotYetValid

The token’s nbf claim is in the future — mirrors {error, not_yet_valid}.

NoToken

A UCAN-gated procedure was called with no token at all — mirrors macula_station_link.erl’s check_ucan(<<>>, _) -> unauthorized clause (an empty/absent token is refused before ever attempting to verify anything).

Trait Implementations

impl Debug for UcanError

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

Formats the value using the given formatter.

impl Display for UcanError

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

Formats the value using the given formatter.

impl Error for UcanError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.