import type { Data, DataKey } from "../util/data.js";
import type { Updates } from "../util/update.js";
import { Store } from "./Store.js";
/** Store a data object. */
export declare class DataStore<T extends Data> extends Store<T> {
    /** Get the data of this store. */
    get data(): T;
    /** Set the data of this store. */
    set data(data: T);
    /** Update several props in this data. */
    update(updates: Updates<T>): void;
    /** Update a single named prop in this data. */
    getProp<K extends DataKey<T>>(name: K): T[K];
    /** Update a single named prop in this data. */
    setProp<K extends DataKey<T>>(name: K, value: T[K]): void;
}
/** Store an optional data object. */
export declare class OptionalDataStore<T extends Data> extends Store<T | undefined> {
    /** Get current data value of this store (or throw `Promise` that resolves to the next required value). */
    get data(): T;
    /** Set the data of this store. */
    set data(data: T);
    /** Does the data exist or not? */
    get exists(): boolean;
    /** Update several props in this data. */
    update(updates: Updates<T>): void;
    /** Update a single named prop in this data. */
    getProp<K extends DataKey<T>>(name: K): T[K];
    /** Update a single named prop in this data. */
    setProp<K extends DataKey<T>>(name: K, value: T[K]): void;
    /** Set the data to `undefined`. */
    unset(): void;
}