export interface IKVStore {
    /**
     * Get a value by its key.
     *
     * @param key
     */
    get<T>(key: string): Promise<T | undefined>;
    /**
     * Set a value with a key.
     *
     * @param key
     * @param value
     */
    set(key: string, value: any): Promise<void>;
    /**
     * Set multiple values at once. This is faster than calling set() multiple times.
     * It's also atomic – if one of the pairs can't be added, none will be added.
     *
     * @param entries Array of entries, where each entry is an array of `[key, value]`.
     */
    setMany(entries: [string, any][]): Promise<void>;
    /**
     * Get multiple values by their keys
     *
     * @param keys
     */
    getMany<T>(keys: string[]): Promise<[string, T][]>;
    /**
     * Delete a particular key from the store.
     *
     * @param key
     */
    delete(key: string): Promise<void>;
    /**
     * Delete multiple keys at once.
     *
     * @param keys List of keys to delete.
     */
    deleteMany(keys: string[]): Promise<void>;
    /**
     * Clear all values in the store.
     *
     */
    clear(): Promise<void>;
    keys(): Promise<string[]>;
    values<T>(): Promise<T[]>;
    entries<T>(): Promise<[string, T][]>;
}
export declare class LocalStorageKVStore implements IKVStore {
    get<T>(key: string): Promise<T | undefined>;
    set(key: string, value: any): Promise<void>;
    setMany(entries: [string, any][]): Promise<void>;
    getMany<T>(keys: string[]): Promise<[string, T][]>;
    delete(key: string): Promise<void>;
    deleteMany(keys: string[]): Promise<void>;
    clear(): Promise<void>;
    keys(): Promise<string[]>;
    values<T>(): Promise<T[]>;
    entries<T>(): Promise<[string, T][]>;
}
export declare class MemoryKVStore implements IKVStore {
    private storage;
    get<T>(key: string): Promise<T | undefined>;
    set(key: string, value: any): Promise<void>;
    setMany(entries: [string, any][]): Promise<void>;
    getMany<T>(keys: string[]): Promise<[string, T][]>;
    delete(key: string): Promise<void>;
    deleteMany(keys: string[]): Promise<void>;
    clear(): Promise<void>;
    keys(): Promise<string[]>;
    values<T>(): Promise<T[]>;
    entries<T>(): Promise<[string, T][]>;
}
export type UseStore = <T>(txMode: IDBTransactionMode, callback: (store: IDBObjectStore) => T | PromiseLike<T>) => Promise<T>;
export declare class IndexedDBKVStore implements IKVStore {
    store: UseStore;
    static isIndexedDBSupported(): boolean;
    constructor(databaseName: string, storeName: string);
    private promisifyRequest;
    private createStore;
    private eachCursor;
    get<T>(key: string): Promise<T | undefined>;
    set(key: string, value: any): Promise<void>;
    setMany(entries: [string, any][]): Promise<void>;
    getMany<T>(keys: string[]): Promise<[string, T][]>;
    delete(key: string): Promise<void>;
    deleteMany(keys: string[]): Promise<void>;
    clear(): Promise<void>;
    keys<KeyType extends IDBValidKey>(): Promise<KeyType[]>;
    values<T = any>(): Promise<T[]>;
    entries<KeyType extends IDBValidKey, ValueType = any>(): Promise<[
        KeyType,
        ValueType
    ][]>;
}