The sats must flow https://video.nostr.build/2e90629a07e0d2492a58f202fc549528f4e4dba92cac2ba8d3dbf7d3718fada9.mp4
Ecash im assuming. What NFC tag did you use!?
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No it's just custodial IOUs. https://www.aliexpress.com/item/1005006363740793.html