export interface RosterPeer {
    userid: string;
    address: string | null;
    name: string | null;
    descr: string | null;
    punk: number | null;
    online: boolean;
    lastSeen: number;
}
/** Who else is on this bridge. Null when the bridge speaks the older protocol
 *  and never issues a ticket — an absence, not an error. */
export declare function bridgeRoster(wsUrl: string, keyFile: string, profile: {
    name?: string;
    descr?: string;
    address?: string;
}): Promise<{
    bridge: string;
    online: number;
    peers: RosterPeer[];
} | null>;