/**
 * IP Filter
 *
 * Allow/deny list with CIDR support for IPv4 and IPv6.
 * Pure computation — no storage or external dependencies.
 */
import type { IpFilterConfig, IpFilterResult } from './types';
export declare class IpFilter {
    private readonly allowRules;
    private readonly denyRules;
    private readonly defaultAction;
    constructor(config: IpFilterConfig);
    /**
     * Check if a client IP is allowed.
     */
    check(clientIp: string): IpFilterResult;
    /**
     * Check if an IP is on the allow list (bypasses rate limiting).
     */
    isAllowListed(clientIp: string): boolean;
}