import { parse } from "tldts"; export function isValidRpId(rpId: string, origin: string) { const parsedOrigin = parse(origin, { allowPrivateDomains: true }); const parsedRpId = parse(rpId, { allowPrivateDomains: true }); return ( parsedOrigin.domain === parsedRpId.domain && parsedOrigin.subdomain.endsWith(parsedRpId.subdomain) ); }