Enum ConsumeItem 

pub enum ConsumeItem {
    Channel {
        payloads: Vec<Payload>,
    },
    Events {
        base: MessagePosition,
        start_peaks: BoundedVec<Hash, ConstU32<MAX_MMR_HASHES>>,
        payloads: Vec<Payload>,
    },
}

One stream’s consumption this block. Both arms verify the same way (hash payloads into leaves, append to a frontier, let the lift bind the endpoint) and differ only in where the frontier comes from.

Variants

Channel

Prefix discipline: the frontier is the stored inbound frontier; payloads are the stream’s next messages, in order. Any deviation in order or count yields an endpoint no lift can bind.

Fields

payloads: Vec<Payload>

Events

Inclusion discipline (registers, event streams): the item carries the frontier, since a lossy consumer keeps none. start_peaks are the peaks at base. At least one payload; a register or head read has exactly one.

base and start_peaks are unchecked hints: a lie in either yields a root no lift can bind, because the stream root commits the leaf count.

Replay: a register read below the stored RegisterRead::at is ignored; an event read must be above the stream’s highwater, which then moves to base + len - 1.

Fields

base: MessagePosition

start_peaks: BoundedVec<Hash, ConstU32<MAX_MMR_HASHES>>

payloads: Vec<Payload>

Trait Implementations

impl Clone for ConsumeItem

fn clone(&self) -> ConsumeItem

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ConsumeItem

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

Formats the value using the given formatter.

impl Decode for ConsumeItem

fn decode<__CodecInputEdqy: Input>( __codec_input_edqy: &mut __CodecInputEdqy, ) -> Result<Self, Error>

Attempt to deserialise the value from input.

fn decode_into<I>( input: &mut I, dst: &mut MaybeUninit<Self>, ) -> Result<DecodeFinished, Error>

where I: Input,

Attempt to deserialize the value from input into a pre-allocated piece of memory.

fn skip<I>(input: &mut I) -> Result<(), Error>

where I: Input,

Attempt to skip the encoded value from input.

fn encoded_fixed_size() -> Option<usize>

Returns the fixed encoded size of the type.

impl Encode for ConsumeItem

fn size_hint(&self) -> usize

If possible give a hint of expected size of the encoding.

fn encode_to<__CodecOutputEdqy: Output + ?Sized>( &self, __codec_dest_edqy: &mut __CodecOutputEdqy, )

Convert self to a slice and append it to the destination.

fn encode(&self) -> Vec<u8>

Convert self to an owned vector.

fn using_encoded<R, F>(&self, f: F) -> R

where F: FnOnce(&[u8]) -> R,

Convert self to a slice and then invoke the given closure with it.

fn encoded_size(&self) -> usize

Calculates the encoded size.

impl PartialEq for ConsumeItem

fn eq(&self, other: &ConsumeItem) -> 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 TypeInfo for ConsumeItem

type Identity = ConsumeItem

The type identifying for which type info is provided.

fn type_info() -> Type

Returns the static type identifier for Self.

impl DecodeWithMemTracking for ConsumeItem

impl EncodeLike for ConsumeItem

impl Eq for ConsumeItem

impl StructuralPartialEq for ConsumeItem