import { TierType } from './types/TierType';
export declare const GST_RATE_PERCENT: number;
type GSTSettings = {
    number?: string;
    type?: 'OWN' | 'HOST';
    disabled?: boolean;
};
/**
 * Returns true if GST is enabled for this account
 */
export declare const accountHasGST: (account: {
    settings?: {
        GST?: GSTSettings;
        parent?: {
            settings?: {
                GST?: GSTSettings;
            };
        };
        parentCollective?: {
            settings?: {
                GST?: GSTSettings;
            };
        };
    };
} | null) => boolean;
/**
 * Returns true if the given tier type can be subject to VAT
 */
export declare const isTierTypeSubjectToGST: (tierType: TierType | `${TierType}`) => boolean;
/**
 * Returns true if GST may apply.
 *
 * @param tierType - the tier type (eg. SUPPORT, TICKET...)
 * @param originCOuntry - two letters country where GST is applied
 */
export declare const gstMayApply: (tierType: TierType | `${TierType}`) => boolean;
/**
 * Calculates the GST rate.
 *
 * @param tierType - the tier type (eg. SUPPORT, TICKET...)
 * @param originCountry - two letters country where GST is applied
 * @param userCountry - two letters country code of the payer
 *
 * @returns {Number} `0` if no GST applies or the percentage as a number between 0 and 100
 */
export declare const getGstPercentage: (tierType: TierType | `${TierType}`, originCountry: string | null, userCountry: string | null) => number;
export {};