import StoreRecordsStorage, { type IStoreRecordsStorageOptions } from './store-records-storage.js';
/**
 * Key-value storage adapter: localStorage, sessionStorage, AsyncStorage, MMKV wrapper etc.
 */
export interface IKeyValueAdapter {
    getItem: (key: string) => string | null | undefined | Promise<string | null | undefined>;
    setItem: (key: string, value: string) => unknown;
    removeItem: (key: string) => unknown;
}
export interface IKeyValueStorageOptions extends IStoreRecordsStorageOptions {
    storage: IKeyValueAdapter;
    /**
     * Keys prefix: store state is saved under `${prefix}:${storeId}`,
     * list of saved stores under `${prefix}-keys`.
     * Default: 'stores'
     */
    prefix?: string;
}
/**
 * Key-value storage for mobx store manager
 *
 * Every store is saved under its own key: a change writes only the changed stores
 * instead of all persisted stores.
 */
declare class KeyValueStorage extends StoreRecordsStorage {
    /**
     * @protected
     */
    protected storage: IKeyValueAdapter;
    /**
     * Keys prefix
     */
    protected prefix: string;
    /**
     * Saved stores ids
     */
    protected storeIds: Set<string>;
    /**
     * Saved stores list is read: it's safe to overwrite it
     */
    protected isIndexLoaded: boolean;
    /**
     * @constructor
     */
    constructor({ storage, prefix, ...options }: IKeyValueStorageOptions);
    /**
     * Store state key
     */
    protected getKey(storeId: string): string;
    /**
     * Saved stores list key
     */
    protected getIndexKey(): string;
    /**
     * Read saved stores ids. undefined - there is no list yet.
     * Throws when the storage can't be read.
     */
    protected getIndex(): Promise<string[] | undefined>;
    /**
     * Read saved stores ids into storeIds
     * Returns false when the list can't be read: it must not be overwritten then.
     */
    protected loadIndex(): Promise<boolean>;
    /**
     * Read store state
     */
    protected getStore(storeId: string): Promise<unknown>;
    /**
     * @inheritDoc
     */
    get(): Promise<Record<string, any> | undefined>;
    /**
     * Write stores, then update saved stores list
     */
    protected write(changes: Map<string, string>, removed?: string[]): Promise<void>;
    /**
     * @inheritDoc
     */
    set(value: Record<string, any> | undefined): Promise<void>;
    /**
     * @inheritDoc
     */
    flush(): Promise<void>;
}
export default KeyValueStorage;