/**
 * Server-side implementation of nostr-biometric-login
 */
import type { AuthenticationOptions, MagicLinkPayload, SessionToken } from '../types/auth';
export declare class NostrBiometricServer {
    /** Maximum number of concurrent sessions before cleanup is triggered */
    private static readonly MAX_SESSIONS;
    /** Session time-to-live: 24 hours */
    private static readonly SESSION_TTL;
    /** Maximum number of concurrent magic links before cleanup is triggered */
    private static readonly MAX_MAGIC_LINKS;
    /** Magic link time-to-live: 1 hour */
    private static readonly MAGIC_LINK_TTL;
    private options;
    private magicLinks;
    private sessions;
    constructor(options: AuthenticationOptions);
    /**
     * Remove expired sessions to free up space
     */
    private cleanupExpiredSessions;
    /**
     * Remove expired magic links to free up space
     */
    private cleanupExpiredMagicLinks;
    /**
     * Enforce session map size limit, cleaning up expired entries first
     * @throws Error if limit is still exceeded after cleanup
     */
    private enforceSessionLimit;
    /**
     * Enforce magic link map size limit, cleaning up expired entries first
     * @throws Error if limit is still exceeded after cleanup
     */
    private enforceMagicLinkLimit;
    /**
     * Create and send a magic link for the given npub
     * @param npub The user's npub to authenticate
     */
    createMagicLink(npub: string): Promise<void>;
    /**
     * Verify a magic link token
     * @param token The token to verify
     */
    verifyMagicLink(token: string): Promise<boolean>;
    /**
     * Start WebAuthn registration/authentication
     * @param npub The user's npub
     */
    startWebAuthn(npub: string): Promise<{
        challenge: string;
    }>;
    /**
     * Verify WebAuthn response and create session
     * @param npub The user's npub
     * @param response The WebAuthn response
     */
    verifyWebAuthnAndCreateSession(npub: string, response: any): Promise<SessionToken>;
    /**
     * Verify a session token
     * @param token The session token to verify
     */
    verifySession(token: string): Promise<boolean>;
}
export type { AuthenticationOptions, MagicLinkPayload, SessionToken };