Enum Update 

#[non_exhaustive]
pub enum Update {
    Transaction(Transaction),
    Reassignment(Reassignment),
    TopologyTransaction(TopologyTransaction),
    OffsetCheckpoint(OffsetCheckpoint),
}

One update, as a stream, a page or a point read returns it.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Transaction(Transaction)

A committed transaction.

Reassignment(Reassignment)

A contract moving between synchronizers.

TopologyTransaction(TopologyTransaction)

A topology change affecting the subscribed parties.

OffsetCheckpoint(OffsetCheckpoint)

A position the participant names as safe to resume from; carries no change.

Implementations

impl Update

pub fn offset(&self) -> i64

The ledger offset of the update.

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

The update id; a checkpoint has none.

pub fn as_transaction(&self) -> Option<&Transaction>

The transaction, when this update is one.

pub fn from_grpc(update: Update) -> Result<Self>

An element of a gRPC update stream or page.

Errors

Error::UnexpectedResponse if the update is malformed.

pub fn from_grpc_point(update: Update) -> Result<Self>

The result of a gRPC point read (update_by_id, update_by_offset).

Errors

Error::UnexpectedResponse if the update is malformed.

pub fn from_json(element: &Value) -> Result<Self>

An element as the JSON API returns it: {"update": {"Transaction": {"value": …}}} from updates and the point reads, or the inner {"Transaction": {"value": …}} a WebSocket frame carries.

Errors

Error::UnexpectedResponse if the element is not an update the JSON API describes.

Trait Implementations

impl Clone for Update

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Update

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

Formats the value using the given formatter.