Enum BackendError 

pub enum BackendError {
    CorruptedData(String),
    DuplicateLineage(LineageId),
    Internal(Box<dyn Error + Sync + Send>),
    Merkle(MerkleError),
    Other(Box<dyn Error + Sync + Send>),
    UnknownLineage(LineageId),
    Unspecified(String),
}

The error type for use within Backends.

Variants

CorruptedData(String)

Raised when corrupted data is encountered in the backend.

It exists as a separate error variant to allow the forest itself to handle it better if possible, but should be considered a fatal error.

DuplicateLineage(LineageId)

Raised when there is a conflict between an existing lineage ID and one already in the forest.

Internal(Box<dyn Error + Sync + Send>)

Raised for arbitrary errors that are not derived from user-input. These should be considered fatal by callers, but exist to forward the termination decision up to an appropriate level.

Merkle(MerkleError)

Raised when there is an error with the merkle tree semantics within the backend.

Other(Box<dyn Error + Sync + Send>)

Raised for arbitrary other errors within the backend that are derived from user-input and hence non-fatal.

UnknownLineage(LineageId)

Raised when the backend is queried for a lineage it doesn’t know about.

Unspecified(String)

Raised for other errors in the backend that are user-specified.

Trait Implementations

impl Debug for BackendError

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

Formats the value using the given formatter.

impl Display for BackendError

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

Formats the value using the given formatter.

impl Error for BackendError

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<BackendError> for LargeSmtForestError

We want to forward backend errors specifically when we can, so we manually implement the conversion.

fn from(value: BackendError) -> LargeSmtForestError

Converts to this type from the input type.

impl From<MerkleError> for BackendError

fn from(source: MerkleError) -> BackendError

Converts to this type from the input type.