> 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/tuo-guan-zu-jian-ji-cheng/ka-pian/gong-zuo-yuan-li.md).

# 工作原理

本节介绍使用卡支付托管组件时的高级支付流程。该流程图展示了托管组件如何参与更广泛的卡交易生命周期。

<img src="https://coda-payments.gitbook.io/coda-public-technical-documentation/~gitbook/image?url=https%3A%2F%2F611292228-files.gitbook.io%2F%7E%2Ffiles%2Fv0%2Fb%2Fgitbook-x-prod.appspot.com%2Fo%2Fspaces%252Fl56STCN5yoV1K1MhVEvU%252Fuploads%252FML9GA6WNjzDZX9RsMNrC%252FScreenshot%25202026-03-05%2520at%252010.03.32%25E2%2580%25AFAM.png%3Falt%3Dmedia%26token%3D345b7ba6-94f5-491a-bfe7-75565fdcb027&#x26;width=768&#x26;dpr=3&#x26;quality=100&#x26;sign=bfb6ba16&#x26;sv=2" alt="" height="1980" width="2332">

**高级流程描述**

1. **发起支付：**&#x7528;户发起支付。您的后端[通过调用 \`Coda.createPaymentSession\` 方法创建支付会话`POST /init.json`](https://coda-payments.gitbook.io/coda-public-technical-documentation/codapay/hosted-component-integration/cards/initiate-a-payment-request)。Coda 返回一个交易 ID 和一个客户端密钥。
2. **初始化 SDK**：使用`clientSecret`后端提供的[SDK 初始化托管组件 SDK](https://coda-payments.gitbook.io/coda-public-technical-documentation/codapay/hosted-component-integration/cards/interact-with-the-codacard-sdk)。卡片表单将在结账容器中安全地渲染。
3. **就绪状态监控：**&#x60A8;的前端会监听状态[`isReady`。](https://coda-payments.gitbook.io/coda-public-technical-documentation/codapay/hosted-component-integration/cards/interact-with-the-codacard-sdk#on-event-callback)当用户填写完所有必填字段时，此状态会通知您的用户界面。
4. **提交：**&#x5F53;用户点击您的“支付”按钮时，您的前端会调用[SDK 的`submit()`方法](https://coda-payments.gitbook.io/coda-public-technical-documentation/codapay/hosted-component-integration/cards/interact-with-the-codacard-sdk#submit)，该方法会将敏感数据直接转发给 Coda。
5. **身份验证（如果需要）**：如果卡片需要 3D 安全验证或其他身份验证，该组件会打开一个安全模态框，供用户完成验证流程。
6. **通知：**&#x4ED8;款成功后，付款状态将转换`SUCCESS`，并向您的后端发送通知。


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