# 支持性功能

本节涵盖了增强 sBTC 系统功能和安全性的附加功能。这些辅助功能有助于提升 sBTC 生态系统的整体稳健性和用户友好性。

{% stepper %}
{% step %}
**交易费用赞助**

允许由赞助方承担 sBTC 交易。
{% endstep %}

{% step %}
**签名者钱包轮换**

为 sBTC 签名者启用安全的密钥轮换。
{% endstep %}
{% endstepper %}


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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.stacks.co/learn/zh/sbtc/auxiliary-features.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.