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# 折扣

折扣功能允许实现 Cortina 预付 API 的支付网关调整交易的最终结算金额,以表示(外部)预付提供商给予持卡人的折扣。

## 如何实施

To do so, the final amount (after the discount amount was deducted) should be sent in `SettAmount` fields, under the `PaymentInfo` object of the Settlement endpoint response or at the Sale endpoint response.

发送的金额必须等于或低于原始金额,且绝不能高于原始授权金额。

折扣金额将反映在该交易记录的交易结算金额中,可在 Nayax Core 提供的交易报告中查看。请注意,此字段仅用于报告目的,且仅可用于支付网关承担折扣成本的情况。

请参阅下面的示例：

```json theme={null}
{
"PaymentInfo": {
      "SettAmount": 0.1}}
```


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