Enum CowError 

pub enum CowError {
    UnknownAsset(String),
    Api {
        status: u16,
        body: String,
    },
    Http(Error),
    Signing(String),
    ZeroQuantity,
    Parse {
        field: &'static str,
        reason: String,
    },
    AppData(String),
    Rpc {
        code: i64,
        message: String,
    },
    Unsupported {
        message: String,
    },
    Config(String),
}

Errors that can occur when interacting with the CoW Protocol SDK.

This is the unified error type returned by every fallible function in the workspace. Each variant carries enough context to produce a useful diagnostic message via its Display implementation.

Variants

UnknownAsset(String)

The asset symbol is not in the token registry.

Api

The CoW Protocol API returned a non-2xx response.

Fields

status: u16

HTTP status code.

body: String

Response body text.

Http(Error)

An HTTP transport error from reqwest.

Signing(String)

EIP-712 signing failed.

ZeroQuantity

The signal quantity is zero — nothing to trade.

Parse

A required field in a quote or order response could not be parsed.

Fields

field: &'static str

Field name that failed to parse.

reason: String

Reason for the parse failure.

AppData(String)

App-data encoding or hashing failed.

Rpc

A JSON-RPC error returned by an Ethereum node.

Fields

code: i64

JSON-RPC error code (e.g., -32602 for invalid params).

message: String

Human-readable error description from the node.

Unsupported

A feature or provider is not supported on the current chain or configuration.

Fields

message: String

Human-readable description of what is not supported.

Config(String)

SDK configuration error (e.g. missing global adapter).

Trait Implementations

impl Debug for CowError

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

Formats the value using the given formatter.

impl Display for CowError

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

Formats the value using the given formatter.

impl Error for CowError

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 CowError

fn from(source: Error) -> Self

Converts to this type from the input type.