import { NamiProductDetails, NamiProductOffer, NamiSubscriptionPeriod } from "../../types/externals/product";
import { PricingPhase, PaywallSKU } from "@namiml/sdk-core";
export declare const isSubscription: (productType?: string) => productType is "subscription";
export declare function getStandardBillingPeriod(product: NamiProductDetails): string | null;
export declare function getFreeTrialPeriod(product: NamiProductDetails): string | null;
export declare function getFreeTrialOffer(product: NamiProductDetails): NamiProductOffer | undefined;
export declare function extractStandardPricingPhases(product: NamiProductDetails): PricingPhase[];
export declare function convertOfferToPricingPhase(offer: NamiProductOffer | null, subPeriod?: NamiSubscriptionPeriod): PricingPhase;
export declare function convertISO8601PeriodToText(iso8601Period: string | null, singular?: boolean, justPeriod?: boolean, justNumber?: boolean, useAbbrev?: boolean): string | null;
/** True if the billing period is month- or year-based (e.g. P1M, P12M, P1Y). Used to return n/a for durationInMonths when period is days/weeks. */
export declare function isMonthOrYearBillingPeriod(period: string | null): boolean;
/**
 * Returns the localized frequency adverb for a period (e.g. "weekly", "monthly", "bi-annually", "yearly").
 * Returns null for day-based periods (n/a). Uses nami_weekly, nami_monthly, nami_biannually, nami_yearly, etc.
 */
export declare function convertISO8601PeriodToPeriodly(iso8601Period: string | null): string | null;
export declare function getCurrencyFormat(priceCurrencyCode: string): Intl.NumberFormat;
export declare const getPriceDifference: (currentSkuPricePerMonth?: number, referencedSkuPricePerMonth?: number, currencyFormat?: Intl.NumberFormat) => string | null;
export declare const getPercentagePriceDifference: (currentSkuPrice?: number, currentSkuDurationInMonths?: number, referencedSkuPrice?: number, referencedSkuPeriodInMonths?: number) => string | null;
export declare const getReferenceSku: (skus: PaywallSKU[], referenceId: string) => PaywallSKU | undefined;
export declare const getPricePerMonth: (phase: PricingPhase) => number;
export declare const getPeriodNumberInDays: (billingPeriod: string) => number;
export declare const getPeriodNumberInWeeks: (billingPeriod: string) => number;
export declare const getBillingPeriodNumber: (billingPeriod: string) => number;
export declare const formattedPrice: (price: number) => number;
export declare function toDouble(num: number): number;