> For the complete documentation index, see [llms.txt](https://document.sunprotocol.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://document.sunprotocol.io/zhi-neng-he-yue/chao-ji-jie-dian-nft-he-yue.md).

# 超级节点NFT合约

最大发行量：`50`

超级节点 NFT 的查询方式与节点 NFT 相同，但它是独立的 NFT 集合，Token ID、持有人和发行量不能与节点 NFT 混用。

### 常用查询

| 函数                                | 输入             | 返回                |
| --------------------------------- | -------------- | ----------------- |
| `totalSupply()`                   | 无              | 当前已经铸造的总数量        |
| `MAX_SUPPLY()`                    | 无              | 最大发行量 `50`        |
| `getUserNFTNum(user)`             | 用户地址           | 该用户持有数量           |
| `getUserID(user)`                 | 用户地址           | 该用户持有的全部 Token ID |
| `ownerOf(tokenId)`                | Token ID       | 当前持有人             |
| `tokenURI(tokenId)`               | Token ID       | 元数据地址             |
| `tokenOfOwnerByIndex(user,index)` | 用户地址、从 0 开始的索引 | 单个 Token ID       |

`getAllHolders()` 返回 `holders` 与 `balances` 两个等长数组，可用于统计全部持有人。不存在的 Token ID 或越界索引会回退。


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