Your pet project sounds great. We are currently building the merchant/retailer mode of Bitcredit wallet on a corporate grade mint implementation in Rust, for smartphones. Since both our efforts seem to aim for Medium of Exchange in the Real Economy, they may be complementary. Let's chat if interested: npub1924xzcxh5hal80afljr7sl7qsr6572y95e3qw0ejdstatsx7ma7sqj4f6r