ReadonlynameWhich backend this is: sqlite-opfs, indexeddb, memory, or a custom name.
Store events. Duplicates, older replaceable versions and deleted events are dropped.
Remove every event.
Release the backend. The cache is not used after this.
Events matching any of the filters, newest first, each filter's limit applied to that filter.
Remove the events matching any of the filters; resolves how many were removed.
A place events are kept between visits. Every backend keeps the same rules: for a replaceable or addressable event only the newest version is kept, a deletion by the same author removes its targets and keeps them out, and ephemeral events are never stored (D-030).