declare module "punycode" {
    function decode(string: string): string;
    function encode(string: string): string;
    function toUnicode(domain: string): string;
    function toASCII(domain: string): string;
    const ucs2: ucs2;
    interface ucs2 {
        decode(string: string): number[];
        encode(codePoints: number[]): string;
    }
    const version: string;
}