X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=blobdiff_plain;f=lightning%2Fsrc%2Foffers%2Foffer.rs;h=405e2e278d8073eac345a801f88906422989f173;hb=f2453b7fffd3ca79cac92803c8c6c99cea970e51;hp=b0819f9e9204f70c707c16312b70668741bdde85;hpb=53d2d473605e29c52d01ddfa625f628be456861c;p=rust-lightning

diff --git a/lightning/src/offers/offer.rs b/lightning/src/offers/offer.rs
index b0819f9e..405e2e27 100644
--- a/lightning/src/offers/offer.rs
+++ b/lightning/src/offers/offer.rs
@@ -431,7 +431,8 @@ impl OfferContents {
 		};
 
 		if !self.expects_quantity() || quantity.is_some() {
-			let expected_amount_msats = offer_amount_msats * quantity.unwrap_or(1);
+			let expected_amount_msats = offer_amount_msats.checked_mul(quantity.unwrap_or(1))
+				.ok_or(SemanticError::InvalidAmount)?;
 			let amount_msats = amount_msats.unwrap_or(expected_amount_msats);
 
 			if amount_msats < expected_amount_msats {