Best practice on recurring timers

[sorokinvj]

Is this the most concise / efficient / best way to update user balance each minute?
a separate parallel state just for this job:

active: {
        type: 'parallel',
        states: {
          balanceUpdater: {
            initial: 'waiting',
            states: {
              waiting: {
                after: {
                  [BALANCE_UPDATE_INTERVAL_MS]: {
                    target: 'updating',
                  },
                },
              },
              updating: {
                entry: 'updateBalanceAndCheckExhaustion',
                always: {
                  target: 'waiting',
                },
              },
            },
          },
         main: { /// main logic for the session }
       }

[davidkpiano]

You can also reenter the waiting state to start the timer again:

waiting: {
  after: {
    [INTERVAL]: {
      actions: 'updateBalance',
      target: 'waiting',
      reenter: true
    }
  }
}