import type * as Core from '../core';
import type * as Rels from './Rels';
declare type Rules = Core.Resource<Rels.CustomerPortalSettings>['subscriptions']['allowNextDateModification'];
declare type Subscription = Omit<Core.Resource<Rels.Subscription>, '_links' | '_embedded'>;
export declare type Constraints = {
    min?: string;
    max?: string;
    disallowedDates?: string[];
    allowedDaysOfWeek?: number[];
    allowedDaysOfMonth?: number[];
};
/**
 * Finds which next transaction date modification rules are applicable to
 * the given subscription and merges them together.
 *
 * @param data Subscription to generate constraints for.
 * @param rules Next date modification config from the customer portal settings.
 *
 * @returns
 * Returns true if all modifications are allowed, false if next date can't
 * be changed by the customer, object with constraints in any other case.
 */
export declare function getNextTransactionDateConstraints(data: Subscription, rules: Rules): Constraints | boolean;
export {};