f - DRY up PositiveTimestamp

Author: jkczyz

lightning-invoice/src/lib.rs

@@ -936,11 +936,7 @@ impl PositiveTimestamp {
 	///
 	/// Otherwise, returns a [`CreationError::TimestampOutOfBounds`].
 	pub fn from_unix_timestamp(unix_seconds: u64) -> Result<Self, CreationError> {
-		if unix_seconds > MAX_TIMESTAMP {
-			Err(CreationError::TimestampOutOfBounds)
-		} else {
-			Ok(PositiveTimestamp(Duration::from_secs(unix_seconds)))
-		}
+		Self::from_duration_since_epoch(Duration::from_secs(unix_seconds))
 	}
 
 	/// Creates a `PositiveTimestamp` from a [`SystemTime`] with a corresponding unix timestamp in