generar mail con archivo adjunto buffer

ex.ts

router.get('/email',function (req, res) {

    var pdf = require('html-pdf');
    var fs = require('fs');
    
    var html = '<h3>hola</h3><p>chau</p>'

  	var transporter = nodemailer.createTransport({
        host: 'smtp.gmail.com', // mail.clubhonorarios.com
        port: 587,
        auth: {
            user: 'ejemplo@gmail.com',
            pass: 'ejemplo' 
        }
    });

    pdf.create(html).toStream(function(err, stream){
      var mailOptions = {
        from: 'Club Honorarios <ch@clubhonorarios.com>', //grab form data from the request body object
        to: 'rbrunount@gmail.com',
        subject: 'PDF',
        text: 'holaaa node cuerpo!!!',
        attachments: [
          {   // stream as an attachment
              filename: 'ejemplo.pdf',
              content: stream
          }],
       };

      transporter.sendMail(mailOptions,function(error, info){
        if(error){
            console.log(error);
            res.json({yo: 'error'});
        }else{
            console.log('Message sent: ' + info.response);
            res.json({yo: info.response});
        };
      });
        
    });
});