import { MMKV } from 'react-native-mmkv';
/**
 * Exported for testing purposes only.
 */
export declare const _store: MMKV;
/**
 * A `useState`-like hook that persists its values to disk.
 *
 * **IMPORTANT**: data persisted by this hook is stored _unencrypted_.
 */
export declare function useStoredValue(key: string): [value: string | undefined, setValue: (value: string | ((current: string | undefined) => string | undefined) | undefined) => void];