Print sum of user balances

lib/tasks/lndhub.rake

@@ -8,13 +8,17 @@ namespace :lndhub do
 
   desc "List wallet balances"
   task :balances => :environment do |t, args|
+    sum = 0
     User.all.each do |user|
       lndhub = Lndhub.new
       auth_token = lndhub.authenticate(user)
       data = lndhub.balance(auth_token)
       balance = data["BTC"]["AvailableBalance"] rescue nil
-      puts "#{user.address}: #{balance}" if balance && balance > 0
-      sleep 0.5
+      if balance && balance > 0
+        sum += balance
+        puts "#{user.address}: #{balance} sats"
+      end
     end
+    puts "--\nSum of user balances: #{sum} sats"
   end
 end