const cepmx = require('@digittmx/cepmx');

const client = await cepmx.validate({
  fecha: '30-12-2019',  // d-m-y
  criterio: 'DIGITT123456',  // clave rastreo
  emisor: '90646',
  receptor: '40012',
  cuenta: '012180011421747234',
  monto: 3.55,
});
const response = await client.download('XML');