use std::time::{SystemTime, UNIX_EPOCH};
pub(crate) fn generated_at_unix_ms() -> Result<String, String> {
let millis = SystemTime::now()
.duration_since(UNIX_EPOCH)
.map_err(|err| format!("system clock before unix epoch: {err}"))?
.as_millis();
Ok(format!("unix_ms:{millis}"))
}