local driver = {}; local driver_mt = { __index = driver }; function driver:open(store, typ) if typ and typ ~= "keyval" then return nil, "unsupported-store"; end return setmetatable({ store = store, type = typ }, driver_mt); end function driver:get(user) return {}; end function driver:set(user, data) return nil, "Storage disabled"; end function driver:stores(username) return { "roster" }; end function driver:purge(user) return true; end module:provides("storage", driver);