export declare type Updater = (value: any) => Promise<any>;
export interface PersistentStoreAdapter {
    del: (key: string) => Promise<void>;
    get: (key: string) => Promise<any>;
    list: () => Promise<string[]>;
    set: (key: string, value: any) => Promise<any>;
    update: (key: string, updater: Updater) => Promise<any[]>;
}