import type { DnsProvider, DnsRecordTypeValue } from '../dns/DnsProvider';
export interface EdgeNodeDnsCoordinatorOptions {
    provider: DnsProvider;
    /** 顶级域名，例如 `undefineds.site`。 */
    rootDomain?: string | null;
    /**
     * 默认记录类型，当目标地址无法识别时回退使用。
     * 一般为 `A`（IPv4）或 `AAAA`（IPv6）。
     */
    defaultRecordType?: DnsRecordTypeValue;
    /** TTL 秒数，缺省按供应商默认。 */
    ttl?: number | string | null;
}
export declare class EdgeNodeDnsCoordinator {
    private readonly logger;
    private readonly provider;
    private readonly rootDomain?;
    private readonly defaultRecordType;
    private readonly ttl?;
    private readonly enabled;
    constructor(options: EdgeNodeDnsCoordinatorOptions);
    /**
     * Reconciles the DNS record owned by one node.
     *
     * `binding` is the control plane's subdomain assignment for that node. When it is
     * supplied it is authoritative, including when it carries no subdomain: that means the
     * node owns no record and nothing may be written or deleted. Node-reported metadata is
     * still consulted for callers whose subdomain is local (`LocalNetworkManager`).
     */
    synchronize(nodeId: string, metadata: Record<string, unknown>, binding?: {
        subdomain?: string;
    }): Promise<void>;
    private extractDnsHints;
    private extractTunnelEntrypoint;
    private extractString;
    private detectRecordType;
    private normalizeRecordValue;
    private extractHost;
    private isIpv4;
    private isIpv6;
    private normalizeRootDomain;
    private normalizeTtl;
}