Extension Storage

Every extension gets its isolated storage which can be accessed only by the extension module (providing the Extension Witness). It's a Bag. Once an extension is installed, it can use the storage to store its data. Ideally, the storage should be managed in a way that allows the extension to be removed from the Kiosk if there are no active trades or other activities happening at the moment.

The storage is always available to the extension if it is installed. Kiosk Owner can't access the storage of the extension if the logic for it is not implemented.

Accessing the storage

An installed extension can access the storage mutably or immutably using one of the following functions:

• storage(_ext: Extension {}, kiosk: &Kiosk): Bag: returns a reference to the storage of the extension. Can be used to read the storage.
• storage_mut(_ext: Extension {}, kiosk: &mut Kiosk): &mut Bag: returns a mutable reference to the storage of the extension. Can be used to read and write to the storage.