Enum SubscriptionMatches 

pub enum SubscriptionMatches {
    Checkpoint,
    Transactions(Vec<Range<u32>>),
    AllTransactions,
    Events(Vec<(u32, Vec<u32>)>),
    AllEvents,
}

Kind-specific match payload. Indices are within-checkpoint and ascending.

Variants

Checkpoint

Checkpoint subscription: the checkpoint matched (some tx satisfied the filter, or the subscription is unfiltered).

Transactions(Vec<Range<u32>>)

Transaction subscription: matched transaction indices, run-length encoded as half-open ranges – ascending, non-overlapping, and maximally coalesced. Bounds the payload at O(runs) for densely-matching filters (e.g. unanchored negation).

AllTransactions

Transaction subscription without a filter: every transaction in the checkpoint matched. O(1) representation of “all”; never constructed for a checkpoint with no transactions.

Events(Vec<(u32, Vec<u32>)>)

Event subscription: per matched transaction index, matched event indices.

AllEvents

Event subscription without a filter: every event in the checkpoint matched. O(1) representation of “all”; never constructed for a checkpoint with no events.

Implementations

impl SubscriptionMatches

pub fn transaction_indices( &self, tx_count: u32, ) -> Option<Box<dyn Iterator<Item = u32> + Send + '_>>

Matched transaction indices of a transaction-subscription payload, ascending; None for other payload kinds. tx_count is the checkpoint’s transaction count, used to expand Self::AllTransactions.

pub fn event_indices<'a>( &'a self, checkpoint: &'a Checkpoint, ) -> Option<Box<dyn Iterator<Item = (u32, u32)> + Send + 'a>>

Matched (transaction index, event index) pairs of an event-subscription payload, ascending; None for other payload kinds. checkpoint is used to expand Self::AllEvents.