# 交易

交易是 Stacks 网络的关键组成部分，也是用户与之交互的主要方式。在本节中，我们将介绍交易的工作原理，并简要介绍后置条件，这是 Stacks 的一项额外安全功能，允许客户端开发者强制执行某些条件，以保护用户免受与恶意合约交互的影响。


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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/transactions.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.