Add is_expired_no_std to Offer & Refund

This was available for OfferContents but not an Offer so dependent
projects could not access it.

Author: benthecarman

lightning/src/offers/offer.rs

@@ -468,6 +468,11 @@ impl Offer {
 		self.contents.is_expired()
 	}
 
+	/// Whether the offer has expired given the duration since the Unix epoch.
+	pub fn is_expired_no_std(&self, duration_since_epoch: Duration) -> bool {
+		self.contents.is_expired_no_std(duration_since_epoch)
+	}
+
 	/// Returns whether the given quantity is valid for the offer.
 	pub fn is_valid_quantity(&self, quantity: u64) -> bool {
 		self.contents.is_valid_quantity(quantity)
@@ -1199,6 +1204,9 @@ mod tests {
 			.unwrap();
 		#[cfg(feature = "std")]
 		assert!(!offer.is_expired());
+		let now = std::time::SystemTime::UNIX_EPOCH
+			.elapsed().unwrap();
+		assert!(!offer.is_expired_no_std(now));
 		assert_eq!(offer.absolute_expiry(), Some(future_expiry));
 		assert_eq!(offer.as_tlv_stream().absolute_expiry, Some(future_expiry.as_secs()));
 

lightning/src/offers/refund.rs

@@ -359,6 +359,11 @@ impl Refund {
 		self.contents.is_expired()
 	}
 
+	/// Whether the refund has expired given the duration since the Unix epoch.
+	pub fn is_expired_no_std(&self, duration_since_epoch: Duration) -> bool {
+		self.contents.is_expired_no_std(duration_since_epoch)
+	}
+
 	/// The issuer of the refund, possibly beginning with `user@domain` or `domain`. Intended to be
 	/// displayed to the user but with the caveat that it has not been verified in any way.
 	pub fn issuer(&self) -> Option<PrintableString> {
@@ -1001,6 +1006,9 @@ mod tests {
 		let (_, tlv_stream, _) = refund.as_tlv_stream();
 		#[cfg(feature = "std")]
 		assert!(!refund.is_expired());
+		let now = std::time::SystemTime::UNIX_EPOCH
+			.elapsed().unwrap();
+		assert!(!refund.is_expired_no_std(now));
 		assert_eq!(refund.absolute_expiry(), Some(future_expiry));
 		assert_eq!(tlv_stream.absolute_expiry, Some(future_expiry.as_secs()));