> 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/daometadata-he-yue.md).

# DAOMETADATA合约

该合约把 DAO 的 `actionType` 数字翻译为目标合约、函数名和参数格式，便于前端展示提案内容。

### 查询接口

* `getActionTypeCount()`：返回支持的动作类型数量。
* `getActionMetadata(actionType)`：返回：
  * `actionType`：动作编号；
  * `contractName`：目标合约名称；
  * `functionName`：目标函数名称；
  * `paramCount`：参数数量；
  * `paramTypes`：逗号分隔的 ABI 参数类型；
  * `paramNames`：逗号分隔的参数名称。

不存在的动作编号会回退。查看 DAO 提案时，可把 `SUNDAO.getProposal(proposalId)` 返回的 `actionType` 传入本合约，再按 `paramTypes` 解码提案的 `params`。


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