Enum Error 

#[non_exhaustive]
pub enum Error {
    UnsupportedExchange(String),
    InvalidSymbol(String),
    InvalidCredentials(&'static str),
    InvalidOrder(&'static str),
    Filter(String),
    Auth(String),
    InsufficientBalance,
    RateLimited {
        retry_after: Option<Duration>,
    },
    OrderRejected {
        code: String,
        message: String,
    },
    Exchange {
        code: String,
        message: String,
    },
    NotFound(String),
    Timeout,
    NotConnected,
    Network(String),
    Deserialization(String),
}

A unified connectivity / execution error.

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.

UnsupportedExchange(String)

No exchange is registered under the given name.

InvalidSymbol(String)

A symbol string could not be parsed or is not listed on the venue.

InvalidCredentials(&'static str)

Credentials are missing a field the venue requires (e.g. a passphrase).

InvalidOrder(&'static str)

An order request is malformed before it is ever sent.

Filter(String)

An order would violate one of the venue’s symbol filters (lot size, price tick, min-notional, …).

Auth(String)

Request signing or authentication was rejected by the venue.

InsufficientBalance

The account has insufficient balance for the request.

RateLimited

The venue rate-limited the request; retry_after is the advised wait if the venue supplied one (Retry-After).

Fields

retry_after: Option<Duration>

The advised back-off, if the venue provided one.

OrderRejected

The venue rejected the order after it was accepted for processing.

Fields

code: String

The venue’s error code, verbatim.

message: String

The venue’s human-readable message.

Exchange

Any other error reported by the venue, kept verbatim for diagnostics.

Fields

code: String

The venue’s error code, verbatim.

message: String

The venue’s human-readable message.

NotFound(String)

A requested entity (order, symbol metadata, …) was not found.

Timeout

The request timed out before a response was received.

NotConnected

A stream or client operation was attempted before connecting.

Network(String)

A transport-level (socket/TLS/DNS) failure.

Deserialization(String)

A response could not be parsed into the expected shape.

Implementations

impl Error

pub fn is_retryable(&self) -> bool

Whether retrying the operation could plausibly succeed: transient transport failures, timeouts and rate limits. Permanent failures (invalid order, auth, insufficient balance, …) return false.

pub fn code(&self) -> Option<&str>

The venue-supplied error code, if this error originated at an exchange.

pub fn with_retry_after(self, retry_after: Option<Duration>) -> Error

Attach the venue’s advised wait to a rate-limit error that was raised without one.

The venue clients recognise a rate limit from the body – a numeric code in the error envelope – while the wait arrives in the Retry-After header. The two are read in different places, so this joins them at the call site that has both.

Every other variant is returned untouched, and a RateLimited that already carries a wait keeps it: a venue that states the delay in its body is more specific than the header, and this must not overwrite it.

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<(), Error>

Formats the value using the given formatter.

impl Display for Error

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

Formats the value using the given formatter.

impl Eq for Error

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 PartialEq for Error

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Error