/// <reference types="node" />
import { Content } from "./parseContent";
import { CookieSettings } from "../types/internal";
/**
 * Generate a Hash from a Body, Headers & Status Code to be used for caching using SHA1
 * @since 6.0.0
*/ export default function toETag(data: Buffer, headers: Record<string, Content>, cookies: Record<string, CookieSettings>, status: number): string | null;