/**
 * Resolve the `userId` a catalog listing query should be scoped to.
 *
 * Logged in: the contact's or customer's own id. Logged out: the channel's
 * ANONYMOUS user, supplied by the host as `configuration.anonymousUserId`.
 *
 * Sending nothing for an anonymous visitor is not equivalent to sending the
 * anonymous user. The backend applies assortment rules — negative order lists
 * in particular — per user, so an unscoped query returns products the visitor
 * is not supposed to see. The host's SSR seed already scopes to the channel's
 * anonymous user; without this the client refetch asked a differently-scoped
 * question and quietly replaced the correct server-rendered list.
 *
 * The id is resolved server-side (only the server can reach the channel) and
 * seeded into `configuration`, the same route `baseCategoryId` takes since
 * No module guesses it.
 */
export declare function resolveListingUserId(user: {
    contactId?: number;
    customerId?: number;
} | null | undefined, configuration?: {
    anonymousUserId?: number;
} | null): number | undefined;