Good question. I didn’t even think about this aspect during the review of this card. Maybe this can help: https://github.com/coinkite/coinkite-tap-proto ?
Discussion
Thats just the communication protocol to talk to the card, but the code running on the card isn't there 🤔
Would you consider updating your article to mention it being closed source? That should be one of the first considerations for anyone considering a Bitcoin wallet.
Or better yet, maybe coinkite can point you to the source code and you can tout that in your review. Cc nostr:npub1az9xj85cmxv8e9j9y80lvqp97crsqdu2fpu3srwthd99qfu9qsgstam8y8