import { PrimitiveTypes } from 'homebridge';
type Storable = PrimitiveTypes | PrimitiveTypes[] | {
    [key: string]: PrimitiveTypes;
};
export declare class Properties {
    static initStorage(persistPath: string): Promise<void>;
    static get(identifier: string, key: string, encryptionKey?: string): Storable | undefined;
    static set(identifier: string, key: string, item: Storable | undefined, encryptionKey?: string): Promise<void>;
    private static save;
    private static _save;
    private static digest;
    private static encrypt;
    private static decrypt;
}
export {};