Struct exonum::blockchain::TransactionError

pub struct TransactionError { /* fields omitted */ }

Result of unsuccessful transaction execution encompassing both service and framework-wide error handling. This error indicates whether a panic or a user error has occurred.

Notes:

• Content of the description field is excluded from the hash calculation (see StorageValue implementation for the details).
• TransactionErrorType::Panic is set by the framework if panic is raised during transaction execution.
• TransactionError implements Display which can be used for obtaining a simple error description.

Examples

The example below creates a schema; retrieves the table with transaction results from this schema; using a hash takes the result of a certain transaction and returns a message that depends on whether the transaction is successful or not.

use exonum::blockchain::Schema;

let schema = Schema::new(&snapshot);

if let Some(result) = schema.transaction_results().get(&transaction_hash) {
    match result.0 {
        Ok(()) => println!("Successful transaction execution"),
        Err(transaction_error) => {
            // Prints user friendly error description.
            println!("Transaction error: {}", transaction_error);
        }
    }
}

Methods

impl TransactionError

pub fn error_type(&self) -> TransactionErrorType

Returns an error type of this TransactionError instance. This can be either a panic or a user-defined error code.

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

Returns an optional error description.

Trait Implementations

impl PartialOrd<TransactionError> for TransactionError

fn partial_cmp(&self, other: &TransactionError) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &TransactionError) -> bool

This method tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &TransactionError) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &TransactionError) -> bool

This method tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &TransactionError) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl PartialEq<TransactionError> for TransactionError

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=.

impl From<ExecutionError> for TransactionError

fn from(error: ExecutionError) -> Self

Performs the conversion.

impl Clone for TransactionError

fn clone(&self) -> TransactionError

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Ord for TransactionError

fn cmp(&self, other: &TransactionError) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

Compares and returns the minimum of two values.

impl Eq for TransactionError

impl Display for TransactionError

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

Formats the value using the given formatter.

impl Debug for TransactionError

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

Formats the value using the given formatter.