import { Database } from "./Database";
import { Container } from "./Container";
import { ScalarKey, Muid, AsOf, Meta } from "./typedefs";
export declare class KeySet extends Container {
    private constructor();
    static get(database?: Database, muid?: Muid): KeySet;
    static create(database?: Database, meta?: Meta): Promise<KeySet>;
    /**
     * Adds a key to the keyset.
     * If a bundler is supplied, the function will add the entry to that bundler
     * and return immediately (presumably you know what to do with a CS if you passed it in).
     * If the caller does not supply a bundler, then one is created on the fly, and
     * then this method will await on the CS being added to the database instance.
     * This is to allow simple console usage like:
     *      await myKeySet.add("foo");
     * @param key
     * @param change an optional bundler to put this in.
     * @returns a promise that resolves to the address of the newly created entry
     */
    add(key: ScalarKey, meta?: Meta): Promise<Muid>;
    /**
     * Similar to add method, but for multiple entries.
     * @param keys an iterable of keys to add to the key set
     * @param change an optional bundler to put this in.
     * @returns a promise that resolves to a Bundler object for the created entries.
     */
    update(keys: Iterable<ScalarKey>, meta?: Meta): Promise<void>;
    /**
     * Adds a deletion marker (tombstone) for a particular key in the directory.
     * The corresponding value will be seen to be unset in the data model.
     * @param key
     * @param change an optional bundler to put this in.
     * @returns a promise that resolves to the address of the newly created deletion entry
     */
    delete(key: ScalarKey, meta?: Meta): Promise<Muid>;
    /**
     * Function to iterate over the contents of the key set.
     * @param asOf
     * @returns an async iterator across everything in the key set, with values returned as pairs of Key, Key
     */
    entries(asOf?: AsOf): AsyncGenerator<[ScalarKey, ScalarKey], void, unknown>;
    /**
     * Returns whether the key set has a key or not.
     * @param key
     * @param asOf
     * @returns true if the key set has the key, false if not.
     */
    has(key: ScalarKey, asOf?: AsOf): Promise<boolean>;
    reset(toTime?: AsOf, recurse?: any, meta?: Meta): Promise<void>;
    /**
     * Returns the contents of the key set as a set.
     * @param asOf
     * @returns a promise that resolves to a set with KeyTypes.
     */
    toSet(asOf?: AsOf): Promise<Set<ScalarKey>>;
    /**
     * How many entries are in the key set.
     * @param asOf
     * @returns a promise that resolves to a number.
     */
    size(asOf?: AsOf): Promise<number>;
    /**
     * Generates a JSON representation of the data in the key set.
     * Mostly intended for demo/debug purposes.
     * @param indent true to pretty print
     * @param asOf effective time
     * @param seen (internal use only! This prevents cycles from breaking things)
     * @returns a JSON string
     */
    toJson(indent?: number | boolean, asOf?: AsOf, seen?: Set<string>): Promise<string>;
}