import dayjs from "dayjs";
import Holidays from "date-holidays";
import { CustomHoliday } from "./types";
/**
 * Throws error to the console if a US State abbreviation is invalid, otherwise returns true
 *
 * @param {string} stateAbbrv: State abbreviation. eg "pa"
 * @param {Holidays} hd: date-holidays instance
 * @returns {boolean} returns true if valid US state
 */
export declare const validateState: (stateAbbrv: string, hd: Holidays) => boolean;
/**
 * Checks that provided date is in valid format and returns date as a dayjs object.
 *
 * @param {string| Date | dayjs.Dayjs} inputDate - date to validate
 * @returns {Dayjs} inputDate converted into Dayjs object.
 */
export declare const validateDate: (inputDate: string | Date | dayjs.Dayjs) => dayjs.Dayjs;
/**
 * Gets the date-holiday defined 'rule' for a specific holiday. Returns empty string if name isn't found.
 *
 * @param {Holidays} hd - Holidays instance
 * @param {string} holName - name of holiday. eg. "Christmas Day"
 * @param {string | number | Date} year - year to search, defaults to current year if not provided.
 * @returns {string}
 */
export declare const getHolidayRule: (hd: Holidays, holName: string, year?: string | number | Date) => string;
/**
 * Takes a Holidays instance and list of holidays and sets each holiday's type as 'optional' in the instance.
 *
 * @param {Holidays} hd - Holidays instance
 * @param {string[]} arrHols - array of holiday names. eg ["Christmas Day", "New Year's Day"]
 * @param {string | number | Date} year - year to search, defaults to current year if not provided.
 * @returns {void}
 */
export declare const filterHolidays: (hd: Holidays, arrHols: string[], year?: string | number | Date) => void;
/**
 * Takes a Holidays instance and adds a list of custom public holidays.
 *
 * @param {Holidays} hd - Holidays instance
 * @param {CustomHoliday[]} arrHols - list of objects representing custom holidays.
 * @returns {void}
 */
export declare const addPublicHolidays: (hd: Holidays, arrHols: CustomHoliday[]) => void;