Struct StreamUpdate

pub struct StreamUpdate {
    pub chain_id: ChainId,
    pub stream_id: StreamId,
    pub previous_index: u32,
    pub next_index: u32,
}

An update for a stream with new events.

Fields

chain_id: ChainId

The publishing chain.

stream_id: StreamId

The stream ID.

previous_index: u32

The lowest index of a new event. See StreamUpdate::new_indices.

next_index: u32

The index of the next event, i.e. the lowest for which no event is known yet.

Implementations

impl StreamUpdate

pub fn new_indices(&self) -> impl Iterator<Item = u32>

Returns the indices of all new events in the stream.

Trait Implementations

impl Clone for StreamUpdate

fn clone(&self) -> StreamUpdate

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for StreamUpdate

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for StreamUpdate

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for StreamUpdate

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl WitLoad for StreamUpdate

fn load<Instance>( memory: &Memory<'_, Instance>, location: GuestPointer, ) -> Result<Self, RuntimeError>

where Instance: InstanceWithMemory, <Instance::Runtime as Runtime>::Memory: RuntimeMemory<Instance>,

Loads an instance of the type from the location in the guest’s memory.

fn lift_from<Instance>( flat_layout: <Self::Layout as Layout>::Flat, memory: &Memory<'_, Instance>, ) -> Result<Self, RuntimeError>

where Instance: InstanceWithMemory, <Instance::Runtime as Runtime>::Memory: RuntimeMemory<Instance>,

Lifts an instance of the type from the flat_layout representation.

impl WitStore for StreamUpdate

fn store<Instance>( &self, memory: &mut Memory<'_, Instance>, location: GuestPointer, ) -> Result<(), RuntimeError>

where Instance: InstanceWithMemory, <Instance::Runtime as Runtime>::Memory: RuntimeMemory<Instance>,

Stores the type at the location in the guest’s memory.

fn lower<Instance>( &self, memory: &mut Memory<'_, Instance>, ) -> Result<<Self::Layout as Layout>::Flat, RuntimeError>

where Instance: InstanceWithMemory, <Instance::Runtime as Runtime>::Memory: RuntimeMemory<Instance>,

Lowers the type into its flat layout representation.

impl WitType for StreamUpdate

const SIZE: u32 = 88u32

The size of the type when laid out in memory.

type Layout = <HCons<ChainId, HCons<StreamId, HCons<u32, HCons<u32, HNil>>>> as WitType>::Layout

The layout of the type as fundamental types.

type Dependencies = HCons<ChainId, HCons<StreamId, HCons<u32, HCons<u32, HNil>>>>

Other WitTypes that this type depends on.

fn wit_type_name() -> Cow<'static, str>

Generates the WIT type name for this type.

fn wit_type_declaration() -> Cow<'static, str>

Generates the WIT type declaration for this type.