以编程方式将电子邮件添加到Stripe Charge

Question

我有以下代码处理表单中的POST：

app.post('/:advertorial/payment', async (req, res) => {
  const advertorial = req.params.advertorial
  const stripeToken = req.body.stripeToken

  stripe.charges.create({
    amount: COSTS.RESTBETTER_DILATOR_PRICE,
    currency: 'usd',
    description: `Example charge for ${new Date()}`,
    source: stripeToken,
    receipt_email: req.body.result.token.email,
    metadata: {
      'customer_email': req.body.result.token.email
    }
  }).then(
    function (result) { res.send(JSON.stringify(result)) },
    function (err) { res.json(err) }
  )
})

有趣的是，元数据可以很好地保存。根据{{​​3}}

另一方面，元数据片段似乎起作用：

documentation, receipt_email should be a field that I can include but in the resulting charge item in Stripe it is nowhere to be found

我在这里想念什么？