The main database trait, allowing Substrate to store data persistently.
Databaseas an in-memory hash map.
commitis not atomic.
A series of changes to the database that can be committed atomically. They do not take effect until passed into
An alteration to the database.
Wrap RocksDb database into a trait object that implements
fwith the value previously stored against
keyand return the result, or
keyis not currently in the database.
An identifier for a column.