};
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 {