Thank you so much! Would absolutely love your feedback on the minting process once you get them in! I've been really the only person to test them as I don't have many "Bitcoin friends" IRL who are savvy enough to really care about this stuff. it would be cool to get feedback on how the experience was for you and if there are UX improvements I can roll out to make it easier. I'd recommend using the electrum wallet android app when minting as it easily gives the private key & the corresponding address.

Regarding the art on the tokens, I thought that was another cool bonus as well. I already had a photo printer & a cheap die cutter at home with sticker paper so these were easy to make for me but making a small run of stickers is also pretty cheap. I literally just colored the tokens with a black sharpie then pasted the sticker on to give it the all black look.

While coding everything up, I had a vision that people would make small "community mints" of sorts. One of the features of the NTAG 424's is that they basically have "immutable" serial numbers that are extremely hard to copy & produce unique results per tap that only the original tag can produce, kind of like a zkproof. So unless you're like a state actor or have extremely advanced lab equipment, it's basically impractical to exploit especially for a $1-$250 tag.

The tags also have server-database authentication/communication features so you can easily build an authentication system on top of the base app. Only reason I haven't coded that up is because the initial idea was to make "sneaker net coins" - ie, offline coins. (The app doesn't need Internet to work, just needs Internet to display the balance of the token)

I am also a bit more "privacy minded" and feel somewhat hesitant to basically implement a "coin tracking" system of sorts 😅. But if people like the idea it would be cool to have some sort of node or federation software that detects duplicates and stuff like that. (Would obviously require an internet connection though)