Tu conexión directa con ARCA

import { Arca } from "@arcasdk/core";

const arca = new Arca({
  cuit: 20111111112,
  cert: process.env.AFIP_CERT,
  key: process.env.AFIP_KEY,
});

const invoice = await arca.electronicBillingService.createVoucher({
  // ... tu comprobante
});