Enum ProviderError 

pub enum ProviderError {
    Unauthorized(String),
    RateLimited {
        retry_after_ms: u64,
    },
    ModelNotFound {
        model: String,
    },
    InvalidRequest(String),
    ProviderUpstream {
        status: u16,
        message: String,
    },
    Timeout {
        ms: u64,
    },
    Network(Error),
    Deserialize(String),
    Unsupported(String),
    Internal(String),
}

Variants

Unauthorized(String)

RateLimited

Fields

retry_after_ms: u64

ModelNotFound

Fields

model: String

InvalidRequest(String)

ProviderUpstream

Fields

status: u16

message: String

Timeout

Fields

ms: u64

Network(Error)

Deserialize(String)

Unsupported(String)

Internal(String)

Implementations

impl ProviderError

pub fn is_retriable(&self) -> bool

True if the error is retriable. The core layer applies backoff + jitter.

pub fn is_fallback_eligible(&self) -> bool

True if the error means we should try a fallback provider.

Transient/load and server-side conditions are fallback-eligible: upstream server errors (5xx), timeouts, model-not-found, and rate limiting (429). A 429 is also Self::is_retriable, so the dispatch loop first exhausts the same-provider retry budget (honoring retry_after_ms); only then does failover advance to a candidate that may have spare quota — a common real-world recovery during a primary provider’s capacity crunch.

A deterministic client error (400 invalid request, 403 forbidden, 422 unprocessable) is NOT eligible: it would fail identically on every provider, so failing over just burns extra upstream calls + spend.

Trait Implementations

impl Debug for ProviderError

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

Formats the value using the given formatter.

impl Display for ProviderError

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

Formats the value using the given formatter.

impl Error for ProviderError

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<Error> for ProviderError

fn from(source: Error) -> Self

Converts to this type from the input type.