export declare const isIPv4: (value: string | undefined) => boolean;
export declare const isIPv6: (value: string | undefined) => boolean;
export declare const isIP: (value: string | undefined) => "ipv4" | "ipv6" | undefined;
/**
 * Checks the value respects `<scheme> "://" <hostname> [ ":" <port> ]`.
 *
 * @param value
 * @returns
 */
export declare const isOrigin: (value: string | undefined) => boolean;