interface ReturnValues { isValid: boolean; telco: string | null; short: string; normalized: string; error?: string | null; dashed: string; formatted: string; } declare module "rwanda-phone-utils" { export function short(value: string): string; export function dashed(value: string): string; export function format(value: string): string; export function normalize(value: string): string; export function telco(value: string): string; export function isValid(value: string): string; export default function (value: string): ReturnValues; }