Enum SubscriberCapability 

#[non_exhaustive]
pub enum SubscriberCapability {
    Logs,
    BlockHeaders,
    FullBlocks,
    PendingTransactionHashes,
    PendingTransactions,
    HistoricalBackfill,
    Live,
    DurableReplay,
    OwnerScopedDelivery,
    DynamicInterests,
    ExplicitReorgs,
    FinalityUpdates,
    Barriers,
    Preconfirmations,
}

One independently negotiable event-subscriber behavior.

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.

Logs

Emit EVM logs.

BlockHeaders

Emit block headers.

FullBlocks

Emit full blocks with transaction bodies.

PendingTransactionHashes

Emit pending transaction hashes.

PendingTransactions

Emit hydrated pending transactions.

HistoricalBackfill

Fetch historical data from a caller-selected anchor.

Live

Follow live chain data.

DurableReplay

Recover the complete committed consumer position after reconnect or restart, including any unacknowledged delivery.

An implementation may satisfy this with native stream replay or with a durable cursor plus deterministic historical reconciliation of an ephemeral live child. The end-to-end subscriber must still prove there is no gap between the restored position and resumed live delivery. If an old delivery token is emitted again, that token must identify the same immutable delivery and pass the engine’s witness check.

OwnerScopedDelivery

Preserve logical handler ownership on delivered batches.

DynamicInterests

Add and remove interests without replacing the complete session.

ExplicitReorgs

Emit explicit canonical branch transitions.

FinalityUpdates

Emit safe and finalized head updates.

Barriers

Emit ordered synchronization or source-cutover barriers.

Preconfirmations

Emit sequencer pre-confirmations into a disposable state overlay.

Trait Implementations

impl Clone for SubscriberCapability

fn clone(&self) -> SubscriberCapability

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for SubscriberCapability

impl Debug for SubscriberCapability

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for SubscriberCapability

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for SubscriberCapability

impl FromIterator<SubscriberCapability> for SubscriberCapabilities

fn from_iter<T: IntoIterator<Item = SubscriberCapability>>(iter: T) -> Self

Creates a value from an iterator.

impl Hash for SubscriberCapability

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for SubscriberCapability

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

This method returns an Ordering between self and other.

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

where Self: Sized,

Compares and returns the maximum of two values.

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

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for SubscriberCapability

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for SubscriberCapability

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

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

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

Tests less than (for self and other) and is used by the < operator.

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

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

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

Tests greater than (for self and other) and is used by the > operator.

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

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

impl Serialize for SubscriberCapability

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for SubscriberCapability