allow setting update interval for addresses with balances counter

apps/explorer/config/config.exs

@@ -13,7 +13,10 @@ config :explorer,
 
 config :explorer, Explorer.Counters.AverageBlockTime, enabled: true
 
-config :explorer, Explorer.Counters.AddressesWithBalanceCounter, enabled: true, enable_consolidation: true
+config :explorer, Explorer.Counters.AddressesWithBalanceCounter,
+  enabled: true,
+  enable_consolidation: true,
+  update_interval_in_seconds: System.get_env("ADDRESS_WITH_BALANCES_UPDATE_INTERVAL") || 30 * 60
 
 config :explorer, Explorer.ExchangeRates, enabled: true, store: :ets
 

apps/explorer/lib/explorer/counters/addresses_with_balance_counter.ex

@@ -29,6 +29,8 @@ defmodule Explorer.Counters.AddressesWithBalanceCounter do
   config = Application.get_env(:explorer, Explorer.Counters.AddressesWithBalanceCounter)
   @enable_consolidation Keyword.get(config, :enable_consolidation)
 
+  @update_interval_in_seconds Keyword.get(config, :update_interval_in_seconds)
+
   @doc """
   Starts a process to periodically update the counter of the token holders.
   """
@@ -62,7 +64,7 @@ defmodule Explorer.Counters.AddressesWithBalanceCounter do
 
   defp schedule_next_consolidation do
     if enable_consolidation?() do
-      Process.send_after(self(), :consolidate, :timer.minutes(30))
+      Process.send_after(self(), :consolidate, :timer.seconds(@update_interval_in_seconds))
     end
   end