feat: check for change in payment lookup id

crates/cdk-axum/src/router_handlers.rs

@@ -321,6 +321,23 @@ pub async fn post_melt_bolt11(
             // Since it will not fail and even if it does the ln payment has already been paid, proofs should still be burned
             let amount_spent = to_unit(pre.total_spent, &pre.unit, &quote.unit).unwrap_or_default();
 
+            let payment_lookup_id = pre.payment_lookup_id;
+
+            if payment_lookup_id != quote.request_lookup_id {
+                tracing::info!(
+                    "Payment lookup id changed post payment from {} to {}",
+                    quote.request_lookup_id,
+                    payment_lookup_id
+                );
+
+                let mut melt_quote = quote;
+                melt_quote.request_lookup_id = payment_lookup_id;
+
+                if let Err(err) = state.mint.localstore.add_melt_quote(melt_quote).await {
+                    tracing::warn!("Could not update payment lookup id: {}", err);
+                }
+            }
+
             (pre.payment_preimage, amount_spent)
         }
     };