import type { IsoPrice } from '../../domain.objects/IsoPrice';
import type { IsoPriceShape } from '../../domain.objects/IsoPriceShape';
import type { IsoPriceWords } from '../../domain.objects/IsoPriceWords';
/**
 * .what = subtracts second price from first
 * .why = enables price difference computation
 *
 * @throws BadRequestError if currencies do not match
 *
 * @example
 * subPrices('USD 50.00', 'USD 20.00')
 * // => 'USD 30.00'
 *
 * @example
 * subPrices('USD 10.00', 'USD 50.00')
 * // => 'USD -40.00' (negative allowed)
 */
export declare function subPrices<TCurrency extends string = string>(minuend: IsoPrice<TCurrency> | string, subtrahend: IsoPrice<TCurrency> | string, options?: {
    format?: 'words';
}): IsoPriceWords<TCurrency>;
export declare function subPrices<TCurrency extends string = string>(minuend: IsoPrice<TCurrency> | string, subtrahend: IsoPrice<TCurrency> | string, options: {
    format: 'shape';
}): IsoPriceShape<TCurrency>;
/**
 * .what = alias for subPrices
 * .why = provides price-prefixed variant
 */
export declare const priceSub: typeof subPrices;