Enum NeoError 

pub enum NeoError {
    InvalidOperation,
    InvalidArgument,
    InvalidType,
    OutOfBounds,
    DivisionByZero,
    Overflow,
    Underflow,
    NullReference,
    InvalidState,
    Custom(String),
    Wasm32CrossCallUnavailable {
        syscall: &'static str,
    },
}

Neo N3 Error type

Represents all possible error conditions that can occur during Neo N3 smart contract execution.

Variants

InvalidOperation

Operation is not valid in the current context

InvalidArgument

Argument has an invalid value or type

InvalidType

Type mismatch encountered during execution

OutOfBounds

Index or offset is out of valid bounds

DivisionByZero

Attempted division by zero

Overflow

Arithmetic overflow occurred

Underflow

Arithmetic underflow occurred

NullReference

Dereferenced a null or invalid reference

InvalidState

Internal state is invalid or corrupted

Custom(String)

Application-specific error with custom message

Wasm32CrossCallUnavailable

L6: a wasm32 cross-call syscall (System.Contract.Call, System.Runtime.LoadScript, System.Contract.CallNative) was invoked, but the wasm32 cross-call executor is not yet implemented. Replaces the v0.8.0 B4 panic-loud sites with a structured error.

Fields

syscall: &'static str

Implementations

impl NeoError

pub fn new(message: &str) -> Self

Creates a new custom error with the given message.

Examples

use neo_types::NeoError;

let err = NeoError::new("Custom error message");

pub fn status_code(&self) -> i64

Returns a stable status code for this error variant.

These codes are used by generated export wrappers to avoid silently treating failures as successful 0 values.

pub fn message(&self) -> &str

Returns the error message if this is a custom error, otherwise returns a generic description.

pub fn as_str(&self) -> &'static str

Returns a static string description of the error variant.

Trait Implementations

impl Clone for NeoError

fn clone(&self) -> NeoError

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for NeoError

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

Formats the value using the given formatter.

impl Display for NeoError

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

Formats the value using the given formatter.

impl Eq for NeoError

impl Error for NeoError

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<ParseIntError> for NeoError

fn from(_: ParseIntError) -> Self

Converts to this type from the input type.

impl From<TryFromIntError> for NeoError

fn from(_: TryFromIntError) -> Self

Converts to this type from the input type.

impl PartialEq for NeoError

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for NeoError