怎样根据交易哈希查询交易详情和n的明文值呢？

set示例：

curl http://127.0.0.1:8080/hello/set?n=hello
返回示例（表示交易哈希）：

0x1c8b283daef12b38632e8a6b8fe4d798e053feb5128d9eaf2be77c324645763b
get示例：

curl http://127.0.0.1:8080/hello/get
返回示例：

["hello"]

这个hello好像是最后一次交易发送的值，如果要获取
0x1c8b283daef12b38632e8a6b8fe4d798e053feb5128d9eaf2be77c324645763b这个哈希的交易回执和 n=hello的明文信息，应该怎么写呢？

The issue identifies the /hello/set and /hello/get endpoints and provides a transaction hash example. Start by tracing those endpoints and the Java SDK transaction-handling code, then determine whether the transaction receipt and the plaintext n value are available through the current API. Done means the requested lookup behavior is clearly implemented or documented, with a reproducible request and response.

Written by the indexing model from the issue text.