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交易费用通常使用网络的原生代币支付。77 钱包支持使用额外的代币支付交易费用。如果您没有足够的原生代币，您将需要购买代币来支付交易费用。


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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.77.im/wei-shen-me-wo-xu-yao-gou-mai-dai-bi-jin-xing-jiao-yi.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.