Struct frame_system::pallet::storage_types::EventTopics
source · pub struct EventTopics();
Expand description
Mapping between a topic (represented by T::Hash) and a vector of indexes
of events in the <Events<T>>
list.
All topic vectors have deterministic storage locations depending on the topic. This allows light-clients to leverage the changes trie storage tracking mechanism and in case of changes fetch the list of events of interest.
The value has the type (BlockNumberFor<T>, EventIndex)
because if we used only just
the EventIndex
then in case if the topic has the same contents on the next block
no notification will be triggered thus the event might be lost.
§Warning: Doc-Only
This type is automatically generated, and is doc-only. See the real version in
[pallet::EventTopics
].
Auto Trait Implementations§
impl Freeze for EventTopics
impl RefUnwindSafe for EventTopics
impl Send for EventTopics
impl Sync for EventTopics
impl Unpin for EventTopics
impl UnwindSafe for EventTopics
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