Struct ErrorEnvelope 

#[non_exhaustive]
pub struct ErrorEnvelope {
    pub wire_code: &'static str,
    pub wire_class: ErrorClass,
    pub retry_after_secs: Option<u64>,
    pub provider_status: Option<u16>,
}

Typed wire shape of an Error — the canonical inspector at sink / SSE / audit boundaries. Built by Error::envelope; never constructed externally so the field set evolves under the same patch-version-stability guarantee as wire_code itself.

Copy is intentional: every field is 16 bytes or smaller. Carry the envelope by value through sink fan-out, OTel attribute stamping, and SSE serialisation without .clone() ceremony.

Field semantics

• wire_code — patch-version-stable snake-case &'static str bucketing the error onto an i18n / metric / typed-wire key. HTTP provider failures bucket on the status family so vendor drift does not require an SDK release.
• wire_class — coarse responsibility split. Client for caller-actionable failures, Server for SDK/vendor-side failures. Orthogonal to retry semantics.
• retry_after_secs — vendor Retry-After hint converted to whole seconds when the originating Error::Provider captured one. None for every other variant or for Provider errors that arrived without a hint. Sinks key SSE rate-limit timers / FE retry indicators off this field.
• provider_status — raw HTTP status when the error is Provider with ProviderErrorKind::Http; None otherwise. Lets audit / replay retain 429 vs 503 granularity even though wire_code collapses them onto coarse buckets.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

wire_code: &'static str

Patch-version-stable wire code. See type-level doc.

wire_class: ErrorClass

Responsibility class. See type-level doc.

retry_after_secs: Option<u64>

Vendor Retry-After hint in seconds. See type-level doc.

provider_status: Option<u16>

Raw HTTP status for Provider/Http failures. See type-level doc.

Trait Implementations

impl Clone for ErrorEnvelope

fn clone(&self) -> ErrorEnvelope

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ErrorEnvelope

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

Formats the value using the given formatter.

impl Hash for ErrorEnvelope

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for ErrorEnvelope

fn eq(&self, other: &ErrorEnvelope) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for ErrorEnvelope

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for ErrorEnvelope

impl Eq for ErrorEnvelope

impl StructuralPartialEq for ErrorEnvelope