import { SharedState } from "@shared-state/core";
export declare type PersistentValue<T = any> = {
    value: T;
    version?: string | number | undefined;
};
export declare type PersistentStorage<T> = {
    get: (key: string) => (T | null) | Promise<T | null>;
    set: (key: string, value: T) => void | Promise<void>;
    remove: (key: string) => void;
    subscribe: (key: string, handler: (nextValue: T | null, previousValue: T | null) => void) => () => void;
};
export declare type PersistedSharedState<T> = SharedState<T> & {
    hydrate: () => void;
    hydrationState: SharedState<boolean>;
};
export declare type PersistentOptions<T> = {
    key: string;
    storage: PersistentStorage<PersistentValue<T>>;
    version?: string | number;
    migrate?: (value: any, version: string | number | undefined) => T;
    onHydrationStart?: () => void;
    onHydrationEnd?: () => void;
    onHydrationFailed?: (error: any) => void;
};