根据你提供的
anemo::types::response::StatusCode 枚举定义，我发现它确实与 tonic::Code 没有直接一一对应的关系。我们需要根据语义进行合理映射。以下是修正后的转换实现：

优化后的状态码映射实现

rust

impl From<tonic::Code> for anemo::types::response::StatusCode {
    fn from(code: tonic::Code) -> Self {
        use anemo::types::response::StatusCode;
        use tonic::Code;
        
        match code {
            Code::Ok => StatusCode::Success,
            Code::Cancelled => StatusCode::RequestTimeout, // 客户端取消，映射为超时
            Code::Unknown => StatusCode::Unknown,
            Code::InvalidArgument => StatusCode::BadRequest,
            Code::DeadlineExceeded => StatusCode::RequestTimeout,
            Code::NotFound => StatusCode::NotFound,
            Code::AlreadyExists => StatusCode::BadRequest, // 资源已存在，属于客户端错误
            Code::PermissionDenied => StatusCode::BadRequest, // 权限问题通常是客户端问题
            Code::ResourceExhausted => StatusCode::TooManyRequests,
            Code::FailedPrecondition => StatusCode::BadRequest, // 前置条件失败
            Code::Aborted => StatusCode::BadRequest, // 操作被中止
            Code::OutOfRange => StatusCode::BadRequest, // 参数超出范围
            Code::Unimplemented => StatusCode::VersionNotSupported, // 版本不支持或方法未实现
            Code::Internal => StatusCode::InternalServerError,
            Code::Unavailable => StatusCode::InternalServerError, // 服务不可用通常是内部问题
            Code::DataLoss => StatusCode::InternalServerError,
            Code::Unauthenticated => StatusCode::BadRequest, // 未认证属于客户端问题
        }
    }
}

// 优化后的处理函数
async fn handle_certificate_v2_impl_anemo(
    &self,
    request: anemo::Request<CertifiedTransaction>,
) -> Result<anemo::Response<HandleCertificateResponseV2>, anemo::rpc::Status> {
    let response = self.handle_certificate_v2_impl(
        tonic::Request::new(request.into_inner())
    )
    .await
    .map(|(response, _weight)| response.into_inner())
    .map_err(|tonic_status| {
        // 转换状态码并保留原始错误消息
        let status_code: anemo::types::response::StatusCode = tonic_status.code().into();
        anemo::rpc::Status::new_with_message(status_code, tonic_status.message().to_string())
    })?;

    Ok(anemo::Response::new(response))
}

映射说明

1. 客户端错误映射：InvalidArgument, AlreadyExists, PermissionDenied 等映射为 BadRequest (400)Unauthenticated 映射为 BadRequest (需要客户端提供认证)ResourceExhausted 映射为 TooManyRequests (429)
2. 服务端错误映射：Internal, Unavailable, DataLoss 映射为 InternalServerError (500)Unimplemented 映射为 VersionNotSupported (505)
3. 超时与取消：Cancelled, DeadlineExceeded 映射为 RequestTimeout (408)

这个映射方案基于 HTTP 状态码的语义，并根据 Tonic 和 Anemo 的错误类型进行了合理匹配。如果你的应用有特殊的错误处理需求，可以根据实际情况调整这个映射关系。