Multiple currencies within cookies using Vercel Middleware

middleware.js

import { rewrite } from '@vercel/edge';
import { RequestCookies } from '@edge-runtime/cookies'

// only run middleware on home page
export const config = {
  matcher: '/',
}

export default function middleware(req) {
	const cookies = new RequestCookies(req.headers)
	const currency = cookies?.get('currency')?.value || 'eur'

	return rewrite(new URL(`/${currency}`, req.url));
}