Enum StateStoreError 

pub enum StateStoreError {
    KeyNotFound(String),
    SerializationError(String),
    StorageError(String),
    Other(String),
}

Errors that can occur when interacting with a state store.

Note on Missing Keys

Missing keys are typically represented as Ok(None) from get(), not as KeyNotFound errors. The KeyNotFound variant is available for custom implementations that need to distinguish between “key doesn’t exist” and other error conditions, but the standard trait methods prefer returning Option values.

Variants

KeyNotFound(String)

The requested key was not found in the store.

Note: Standard implementations return Ok(None) for missing keys instead of this error. This variant is provided for custom implementations that need explicit error-based handling of missing keys.

SerializationError(String)

Failed to serialize or deserialize data.

This error typically occurs when stored data cannot be parsed or when data being stored cannot be serialized to the expected format.

StorageError(String)

Failed to read or write to the underlying storage.

This error indicates I/O failures, database errors, or other storage backend issues.

Other(String)

Generic error for other failures.

Use this for errors that don’t fit the other categories.

Trait Implementations

impl Debug for StateStoreError

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

Formats the value using the given formatter.

impl Display for StateStoreError

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

Formats the value using the given formatter.

impl Error for StateStoreError

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.