Enum Error 

#[non_exhaustive]
pub enum Error {
    UrlParse(ParseError),
    InvalidUrl(String),
    UnknownScheme(String),
    UnsupportedOperation {
        scheme: &'static str,
        operation: &'static str,
    },
    NotFound(String),
    PermissionDenied(String),
    AuthenticationFailed(String),
    PreconditionFailed(String),
    Backend {
        scheme: &'static str,
        kind: BackendFailureKind,
        message: String,
    },
}

hasp library-surface errors. Stable across all backends; backend impls map their native error vocabulary into these variants.

This enum is intentionally flat so consumers can match on variants without string-matching nested SDK-style error hierarchies.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

UrlParse(ParseError)

URL parse failure at the url crate layer (malformed URI).

InvalidUrl(String)

URL parsed but does not satisfy a backend-specific grammar rule (e.g. wrong path-segment count, missing required component).

UnknownScheme(String)

URL scheme is not registered in this Store.

UnsupportedOperation

Backend recognized the URL but does not implement the requested verb (e.g. env:// does not support put).

Fields

scheme: &'static str

operation: &'static str

NotFound(String)

The addressed secret does not exist.

PermissionDenied(String)

Caller’s credentials are valid; caller is not authorized for this resource.

AuthenticationFailed(String)

Caller’s credentials are missing, invalid, or expired.

PreconditionFailed(String)

Resource is in a state that blocks the operation, even though the caller has permission and the resource exists.

Backend

Backend-specific failure that does not fit a more-specific variant. kind provides retry guidance; message carries diagnostic detail (backend error code, HTTP status, sub-error). Never includes secret values.

Fields

scheme: &'static str

kind: BackendFailureKind

message: String

Implementations

impl Error

pub fn is_transient(&self) -> bool

True if a retry has any chance of succeeding without external action.

Returns true for Backend { kind: Transient | Throttled, .. }. Returns false for everything else, including NotFound, PermissionDenied, AuthenticationFailed, PreconditionFailed.

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

Stable classifier for use in audit events and exit-code mapping.

The returned label is closed-set — pattern-matchable by SIEMs and scripts without parsing the human-readable message. Add a new arm here only when adding a new Error variant.

Trait Implementations

impl Clone for Error

fn clone(&self) -> Error

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Error

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

Formats the value using the given formatter.

impl Display for Error

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

Formats the value using the given formatter.

impl Error for Error

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.

impl From<ParseError> for Error

fn from(source: ParseError) -> Self

Converts to this type from the input type.