import { CID } from 'multiformats/cid';
/**
 * Resolve an IPNS name to a CID using a public IPFS gateway's HTTP HEAD response.
 *
 * Mechanism: per the IPFS HTTP Gateway spec, `HEAD <gateway>/ipns/<name>/` returns the
 * IPNS-resolved root CID in the `X-Ipfs-Roots` response header (space-separated, ordered
 * from root to leaf). The first entry is the IPNS-resolved CID.
 *
 * This works against any gateway that follows the spec and exposes CORS for HEAD
 * (most public gateways do, e.g. ipfs.zt.ax, ipfs.io, dweb.link).
 *
 * The legacy w3name HTTP endpoint (`GET <base>/name/<ipns>` returning `{value: "/ipfs/<cid>"}`)
 * is also supported here for back-compat with self-hosted w3name-like services — but the
 * X-Ipfs-Roots path is preferred since it's the standardised gateway mechanism.
 *
 * @param ipns - The IPNS name (k51... string)
 * @param gateways - List of gateway base URLs (e.g. `["https://ipfs.zt.ax"]`)
 * @returns The resolved CID, or null if no gateway could resolve the name
 */
export declare function resolveIPNSViaGateway(ipns: string, gateways: string[]): Promise<CID | null>;
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