import { TReferenceProps } from '../../..';
import { IStringProps, TStringValidatorResult } from '../_types';
export interface IIsPaymentReferenceProps {
    /**
     * Will only apply is the string starts with match `+++XXX/XXXX/XXXXX+++`
     */
    optional?: boolean;
}
/**
 * Check if the string is a valid payment reference.
 */
export declare const isPaymentReference: (props?: TReferenceProps<IIsPaymentReferenceProps> & IStringProps) => TStringValidatorResult;