import type { PortalNetworkRoutingTable } from '../client';
import type { ENR, NodeId } from '@chainsafe/enr';
export declare const MEGABYTE = 1048576;
/**
 *  Shortens a Node ID to a readable length
 */
export declare const shortId: (nodeId: string | ENR, routingTable?: PortalNetworkRoutingTable) => string;
/**
 * Generates a random node ID at the specified target log2 distance (i.e. generates a random node ID in a given k-bucket)
 * Follows this algorithm - https://github.com/ethereum/trin/pull/213
 * @param nodeId id of the node to calculate distance from
 * @param targetDistance the target log2 distance to generate a nodeId at
 * @returns a random node ID at a log2 distance of `targetDistance`
 */
export declare const generateRandomNodeIdAtDistance: (nodeId: NodeId, targetDistance: number) => NodeId;
/**
 * Generates the Content ID used to calculate the distance between a node ID and the content key
 * @param contentKey a serialized content key
 * @returns the hex encoded string representation of the SHA256 hash of the serialized contentKey
 */
export declare const serializedContentKeyToContentId: (contentKey: Uint8Array) => string;
export declare const dirSize: (directory: string) => Promise<number>;
export declare function arrayByteLength(byteArray: any[]): number;
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