# Swap procedure

{% hint style="info" %}
Note: There are two ways to obtain calldata data in step 17. One is that the frontend directly generates calldata data by requesting the smart contract, and the other is that calldata data is obtained by requesting the endpoint. For details, please refer to \[Obtain callData]
{% endhint %}

<figure><img src="/files/jpxr5Dpw0Jbm1arPC2im" alt=""><figcaption></figcaption></figure>


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs-bridgers-en.bridgers.xyz/liu-cheng-tu.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.