import type { GetSubscriptionPackagesQuery, SubscriptionPackage } from '@farfetch/blackout-client';
import type { StoreState } from '../../types/index.js';
/**
 * Returns the error given a subscription package action.
 *
 * @param state - Application state.
 * @param query - Get subscription packages query.
 *
 * @returns Fetch subscription packages request error.
 */
export declare const getSubscriptionPackagesError: (state: StoreState, query?: GetSubscriptionPackagesQuery) => import("../../types/nullable.types.js").Nullable<import("@farfetch/blackout-client").BlackoutError> | undefined;
/**
 * Returns the result of a subscription package.
 *
 * @param state - Application state.
 * @param query - Get subscription packages query.
 *
 * @returns Fetch subscription packages result.
 */
export declare const getSubscriptionPackages: (state: StoreState, query?: GetSubscriptionPackagesQuery) => SubscriptionPackage[] | null | undefined;
/**
 * Retrieves if subscription packages have been fetched.
 *
 * Will return true if a fetch request
 * has been made that returned either successfully or failed
 * and false otherwise.
 *
 * @example
 * ```
 * import { areSubscriptionPackagesFetched } from '@farfetch/blackout-redux';
 *
 * const mapStateToProps = state => ({
 *     isFetched: areSubscriptionPackagesFetched(state)
 * });
 * ```
 * @param state - Application state.
 * @param query - Get subscription packages query.
 *
 * @returns isFetched status of the subscription packages.
 */
export declare const areSubscriptionPackagesFetched: (state: StoreState, query?: GetSubscriptionPackagesQuery) => boolean;
/**
 * Returns the loading status of a subscription package.
 *
 * @param state - Application state.
 * @param query - Get subscription packages query.
 *
 * @returns Subscription package loading status.
 */
export declare const areSubscriptionPackagesLoading: (state: StoreState, query?: GetSubscriptionPackagesQuery) => boolean | undefined;
/**
 * Returns the supported delivery channels for all subscription packages.
 *
 * @param state - Application state.
 * @param query - Get subscription packages query.
 *
 * @returns The supported delivery channels.
 */
export declare const getSubscriptionPackagesSupportedChannels: (state: StoreState, query?: GetSubscriptionPackagesQuery) => string[] | undefined;