What do Smurfs use for money?

I'm curious, what do Smurfs use for currency in their enchanting village? Do they have a form of digital tokens, or do they rely on something more tangible, like acorns or precious stones? It's fascinating to ponder the economic system within the Smurf universe and how they might manage their finances. Is there a central bank or is it more of a bartering system? I'd love to hear your thoughts on this intriguing question.