Record relays state

central_backend/src/utils/time_utils.rs

@@ -15,3 +15,21 @@ pub fn time_millis() -> u128 {
         .unwrap()
         .as_millis()
 }
+
+/// Get the number of the day since 01-01-1970 of a given UNIX timestamp
+pub fn day_number(time: u64) -> u64 {
+    time / (3600 * 24)
+}
+
+#[cfg(test)]
+mod test {
+    use crate::utils::time_utils::day_number;
+
+    #[test]
+    fn test_time_of_day() {
+        assert_eq!(day_number(500), 0);
+        assert_eq!(day_number(1726592301), 19983);
+        assert_eq!(day_number(1726592401), 19983);
+        assert_eq!(day_number(1726498701), 19982);
+    }
+}