export declare function normalizeHost(input: string): string;
export declare function normalizeCode(input: string): string;
export interface ServerInput {
    /** Empty when nothing usable was in the input. */
    host: string;
    /** Empty for a plain address, which carries no code. */
    code: string;
}
export declare function parseServerInput(input: string, opts?: {
    defaultLegacyHost?: string;
}): ServerInput;
/** The link that opens an invite in whichever app somebody has. Leave out the code for a
    server anyone can join. */
export declare function inviteLink(host: string, code?: string): string;
/**
 * Whether an address works for somebody on another network. Loopback, private and
 * link-local ranges, CGNAT, and names like `nas` or `box.local` do not.
 */
export declare function isPublicHost(host: string): boolean;