import { Base } from "./base";
/**
 * Wrapper for HASHMAP Redis storage.
 * Mocks JavaScript Maps and has most of the Map's methods.
 *
 * @example
 * let human = new Hash(client, 'human', useJSON = true);
 * await human.set('alice', { isHuman: 'definitely' });
 * await human.set('damir', { isHuman: 'could be' });
 */
export declare class Hash<T> extends Base {
    /**
     * Get the length of the hash (keys length)
     *
     * - Redis command: [HLEN] {@link https://redis.io/commands/hlen}
     * - JavaScript analogy: [Map.prototype.size] {@link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map/size}
     */
    size(): Promise<number>;
    /**
     * Get array of keys in the hash
     *
     * - Redis command: [HKEYS] {@link https://redis.io/commands/hkeys}
     * - JavaScript analogy: [Map.prototype.keys] {@link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map/keys}
     */
    keys(): Promise<string[]>;
    /**
     * Delete element in hash by it's key
     *
     * - Redis command: [HDEL] {@link https://redis.io/commands/hdel}
     * - JavaScript analogy: [Map.prototype.delete] {@link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map/delete}
     *
     * @param  {String}  key Name of the key to delete
     */
    delete(key: string): Promise<void>;
    /**
     * Check whether key exists in hash
     *
     * - Redis command: [HEXISTS] {@link https://redis.io/commands/hexists}
     * - JavaScript analogy: [Map.prototype.has] {@link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map/has}
     *
     * @param {String} key Key to check
     */
    has(key: string): Promise<boolean>;
    /**
     * Set value under given key
     *
     * - Redis command: [HSET] {@link https://redis.io/commands/hset}
     * - JavaScript analogy: [Map.prototype.set] {@link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map/set}
     *
     * @param  {String}  key   Key to set
     * @param  {String}  value Value to set under given key
     */
    set(key: string, value: T): Promise<void>;
    /**
     * Get value by it's key
     *
     * - Redis command: [HGET] {@link https://redis.io/commands/hget}
     * - JavaScript analogy: [Map.prototype.get] {@link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map/get}
     *
     * @param  {String} key Key to get from hash
     */
    get(key: string): Promise<T>;
    /**
     * Get array of values from the hash
     *
     * - Redis command: [HVALS] {@link https://redis.io/commands/hvals}
     * - JavaScript analogy: [Map.prototype.values] {@link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map/values}
     */
    values(): Promise<T[]>;
    /**
     * Returns 2-dimensional array of kind:
     *
     * ```JavaScript
     * [[key1, value1], [key2, value2]]
     * ```
     * To support Object to Map transformation
     *
     * - Redis command: [HGETALL] {@link https://redis.io/commands/hgetall}
     * - JavaScript analogy: [Map.prototype.entries] {@link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map/entries}
     *
     */
    entries(): Promise<[string, T][]>;
    /**
     * Get multiple keys by passing an array of keys
     * This command has no analogy in JS
     *
     * - Redis command: [HMGET] {@link https://redis.io/commands/hmget}
     * - JavaScript analogy: none
     *
     * @param {String[]} keys Keys to get values for
     */
    getMul(keys: string[]): Promise<T[]>;
    /**
     * Returns object representing hash structure
     * This command has no analogy in JS
     *
     * - Redis command: [HGETALL] {@link https://redis.io/commands/hgetall}
     * - JavaScript analogy: none
     */
    getAll(): Promise<{
        [key: string]: T;
    }>;
    /**
     * Set multiple keys by passing an object with key-value structure
     * This command has no analogy in JS
     *
     * - Redis command: [HMSET] {@link https://redis.io/commands/hmset}
     * - JavaScript analogy: none
     *
     * @param   {Object}  valuesObj Object with key-value pairs to set
     * @returns {Promise}
     */
    setMul(valuesObj: {
        [key: string]: T;
    }): any;
}