Kaprekar's Code: How One Smart Contract Challenged the World of Finance

Imagine walking into a bank. You don't need to fill out forms or prove who you are. You simply toss a one-cent coin into a teller’s window. In return, you receive a tiny sliver—one-millionth—of a document called a “Share in This Bank.” You can give this sliver to a friend, sell it, or just hold onto it. And most importantly: at any moment, you can walk back to that window and guaranteed get your one cent back. No conditions. No fine print. Just an ironclad rule, carved in stone—or in our case, in code. Now imagine this bank has no director, no guards, not even a building. There’s only a single webpage on the internet and a robot-program that cannot lie or change its rules. This is not science fiction. It already exists. This book is about a revolution that happened quietly in the back alleys of the internet. ALl illustrations made by author with AI Stable Diffusion v 1.5. Second edition - updated and refactored.