import { Shard } from "../shard";
type PersistConfig<Type> = {
    initialValue: Type;
    fallback?: Type;
    key: string;
};
export declare class PersistShard<Type = {}> extends Shard<Type> {
    private fallback?;
    private key;
    constructor({ initialValue, fallback, key }: PersistConfig<Type>);
    getKey: () => string;
    getFallbackData: () => Type | undefined;
}
export declare const persist: <Type>(config: PersistConfig<Type>) => PersistShard<Type>;
export {};