It's an amazing job what you have done here. I've been tinkering with exactly the same idea (and same implementation) but haven't had the time to go ahead. Your

It's an amazing job what you have done here. I've been tinkering with exactly the same idea (and same implementation) but haven't had the time to go ahead. Your work will instantly jumpstart my own use case (VISA and Beancount) and I thank you for that. Kudos!