> For the complete documentation index, see [llms.txt](https://docs.coda.co/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.coda.co/https-coda-payments.gitbook.io-zhong-wen-coda-private-technical-documentation/codapay/can-kao-zi-liao/zhi-chi-de-zhi-fu-qu-dao/jie-ru-dian-ka-qu-dao-shi-xu-yao-te-bie-zhu-yi-de-shi-xiang.md).

# 接入点卡渠道时需要特别注意的事项

在商家验证回调消息时，有两个特别需要注意的渠道：One-2-Call Cash Card 和 True Money Cash Card。这两个渠道都是泰国的点卡渠道。由于在这些渠道中，我们会在 TotalPrice 中显示用户使用的点卡金额，因此商家需要确保回调中的 TotalPrice 与用户请求的商品价格一致。如果没有进行验证，可能会导致用户用较少的金额购买较多的商品，进而造成商家的损失。

{% hint style="info" %}
📘 <mark style="color:blue;">**例子**</mark>

假设用户购买了价值 100 THB 的商品，并使用了面值为 50 THB 的点卡进行支付。 Coda 回调的 TotalPrice 为 50.00。

如果商家没有验证回调中的金额，可能会照常发货，导致商家损失。

另一个情况是，用户使用 100 THB 的点卡购买了价值 50 THB 的商品。这种情况下，如果商家没有验证，可能会造成用户损失，因为点卡只能一次性使用。
{% endhint %}

{% hint style="warning" %}
**为了避免这种情况，我们建议商家参考以下两种点卡发货方式：**

* 按照用户支付金额发放相应价值的商品。例如：如果用户购买了价值 50 THB 的商品，并使用了 100 THB 的点卡，经过验证时发现异常，商家可以发给用户 100 THB 的商品，这样可以实现商家和用户的双赢。
* 如果商家的游戏货币是虚拟物品（如钻石、金币、宝石等），点卡渠道可以按照汇率进行兑换。例如：1 THB = 10 钻石（即每泰铢可以购买 10 钻石）。这种情况下，商家可以根据点卡的金额，按照汇率发放相应数量的游戏货币（如钻石）。"
  {% endhint %}


---

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