Show HN: A playground to test stablecoin gas fees and concurrent txns on Tempo

Hi HN, I built *Tempo Playground*, a small hands-on playground to explore Tempo’s transaction model for real-world payments. The goal was to make Tempo’s ideas tangible instead of just reading documentation. *What you can try right now:* - Pay transaction fees in *any USD-denominated stablecoin* (no native gas token required) - Execute *concurrent transactions* from the same account (parallel execution) - *Batch multiple calls* into a single atomic transaction *Some early observations:* - Gas costs are around *$0.001 per transaction* - Finality is roughly *0.5s*, which feels close to web2 UX for payments *Link:* https://tempo-playground.vercel.app https://tempo-playground.vercel.app It’s intentionally minimal and still rough around the edges. I’d love feedback on: - What else would you want to test to evaluate a payments-focused chain? - Any edge cases or stress scenarios you think I should explore next? Happy to answer technical questions or share implementation details.