continue receive flow on offer/invoice creation failure

Author: Camillarhi

src/payment/unified_qr.rs

@@ -95,7 +95,7 @@ impl UnifiedQrPayment {
 			Ok(offer) => Some(offer),
 			Err(e) => {
 				log_error!(self.logger, "Failed to create offer: {}", e);
-				return Err(Error::OfferCreationFailed);
+				None
 			},
 		};
 
@@ -111,7 +111,7 @@ impl UnifiedQrPayment {
 			Ok(invoice) => Some(invoice),
 			Err(e) => {
 				log_error!(self.logger, "Failed to create invoice {}", e);
-				return Err(Error::InvoiceCreationFailed);
+				None
 			},
 		};