Struct ModelRefusalError 

pub struct ModelRefusalError {
    pub requested_model: String,
    pub category: Option<String>,
    pub usage: Option<Box<TokenUsage>>,
    pub attempted_candidate: Option<String>,
    pub attempted_candidate_index: Option<usize>,
}

A provider safety refusal that completed at the transport layer but cannot be accepted as an assistant response.

The optional usage belongs to the refusing attempt. It is carried on the typed cause so reliability and turn accounting can bill that work without treating it as accepted-response context usage. category is diagnostic metadata only and must not be rendered to users.

Fields

requested_model: String

Model requested on the refusing attempt.

category: Option<String>

Refusal category token, when the provider supplied one.

usage: Option<Box<TokenUsage>>

Normalized usage billed by the refusing attempt.

attempted_candidate: Option<String>

Exact reliability candidate that emitted a streamed refusal.

Leaf providers leave this unset. Composite providers fill it while forwarding a stream so a non-streaming recovery can skip exactly the already-billed candidate.

attempted_candidate_index: Option<usize>

Position of that candidate in the active reliability domain.

This disambiguates same-profile fallback models, which intentionally share one configured candidate/cooldown identity.

Trait Implementations

impl Clone for ModelRefusalError

fn clone(&self) -> ModelRefusalError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ModelRefusalError

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

Formats the value using the given formatter.

impl Display for ModelRefusalError

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

Formats the value using the given formatter.

impl Error for ModelRefusalError

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<Box<ModelRefusalError>> for StreamError

fn from(source: Box<ModelRefusalError>) -> Self

Converts to this type from the input type.