See index.js which has heavy comments. It first defines the
two main functions, solve and verify, and then the command line API.
You can run the demo with with a specific difficulty which must be integer and an arbitrary string that you will try to solve:
node index.js [DIFFICULTY=10] [PUZZLE...={"vote":"123"}]The code also works in the browser (except the CLI stuff), but there is also
an attempt at a solution based on SubtleCrypto in browser.js