#[cfg(not(feature = "wasm-web"))]
pub fn timestamp_secs() -> u64 {
std::time::SystemTime::now()
.duration_since(std::time::UNIX_EPOCH)
.expect("time went backwards")
.as_secs()
}
#[cfg(feature = "wasm-web")]
pub fn timestamp_secs() -> u64 {
(js_sys::Date::now() as u64) / 1_000
}