/**
 * Helia-based SDN node factory.
 *
 * Creates a Helia node that wraps libp2p with IPFS content-routing, giving
 * every SDN node full IPFS + p2p capabilities in both browser and Node.js.
 *
 * The internal libp2p instance uses the same transport/security/pubsub config
 * as SDNNode so both can interoperate on the same network.
 *
 * Usage:
 *
 *   const { helia, libp2p } = await createHeliaSDNNode({ edgeRelays: [...] });
 *
 *   // IPFS content operations
 *   const fs = unixfs(helia);
 *   const cid = await fs.addBytes(myData);
 *
 *   // p2p stream protocol
 *   libp2p.handle('/my/protocol/1.0.0', handler);
 *
 *   await helia.stop();
 */
import { type Helia } from 'helia';
import { type Libp2p } from 'libp2p';
import type { SDNConfig } from './node';
export interface HeliaSDNNode {
    /** The Helia node (IPFS + libp2p). */
    helia: Helia;
    /** The underlying libp2p instance (also accessible via helia.libp2p). */
    libp2p: Libp2p;
    /** Stop both Helia and libp2p. */
    stop(): Promise<void>;
}
export declare function createHeliaFromLibp2p(libp2p: Libp2p): Promise<Helia>;
export declare function fetchCIDBytesFromHelia(helia: Helia, cid: string): Promise<Uint8Array>;
/**
 * Create a Helia node configured for the Space Data Network.
 *
 * The libp2p config mirrors SDNNode.init() so both node types are
 * compatible peers on the same network.
 *
 * @param config  SDNConfig — same options accepted by SDNNode.create()
 */
export declare function createHeliaSDNNode(config?: SDNConfig): Promise<HeliaSDNNode>;
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