export type SecureStorage = {
    setItem: (key: string, value: string, callback?: SecureStorageCallback['setItem']) => SecureStorage;
    getItem: (key: string, callback: SecureStorageCallback['getItem']) => SecureStorage;
    restoreItem: (key: string, callback?: SecureStorageCallback['restoreItem']) => SecureStorage;
    removeItem: (key: string, callback?: SecureStorageCallback['removeItem']) => SecureStorage;
    clear: (callback: SecureStorageCallback['clear']) => SecureStorage;
};
export type SecureStorageCallback = {
    setItem: (error: string | null, success: null | true) => void;
    getItem: (error: string | null, value: null | string) => void;
    restoreItem: (error: string | null, value: null | string) => void;
    removeItem: (error: string | null, success: null | true) => void;
    clear: (error: string | null) => void;
};