Module versioned_state

Modules§

parse_one_or_many: Deserialize migrate_args as either a single migration (legacy wire shape, a JSON object) or an ordered list (a JSON array). A migration is JSON-tagged by from_version, so the first non-whitespace byte disambiguates: [ is a list, anything else a single object wrapped into a one-element chain. Keeps the pre-list wire format working unchanged.
read_state_version
run_migration_chain: Validate an ordered migration chain end-to-end, then run each step in sequence.
write_state_version