fix: give extra budget to ZapPlanner apps to avoid 80% budget usage warning (#1099)

* fix: give extra budget to ZapPlanner apps to avoid 80% budget usage warning

* fix: zapplanner budget max amount

Author: rolznz

frontend/src/screens/alby/SupportAlby.tsx

@@ -70,7 +70,9 @@ function SupportAlby() {
         return;
       }
 
-      const maxAmount = Math.floor(parsedAmount * 1.01) + 10; // with fee reserve
+      // TODO: extract below code as is duplicated with ZapPlanner
+      // with fee reserve of max(1% or 10 sats) + 30% to avoid nwc_budget_warning (see transactions service)
+      const maxAmount = Math.floor((parsedAmount * 1.01 + 10) * 1.3);
       const isolated = false;
 
       const createAppRequest: CreateAppRequest = {

frontend/src/screens/internal-apps/ZapPlanner.tsx

@@ -118,7 +118,8 @@ export function ZapPlanner() {
         throw new Error("Invalid amount");
       }
 
-      const maxAmount = Math.floor(parsedAmount * 1.01) + 10; // with fee reserve
+      // with fee reserve of max(1% or 10 sats) + 30% to avoid nwc_budget_warning (see transactions service)
+      const maxAmount = Math.floor((parsedAmount * 1.01 + 10) * 1.3);
       const isolated = false;
 
       const createAppRequest: CreateAppRequest = {