This is the real thing — the same engine behind the demos, ported here. Move money around, then try to tamper with a past entry and watch it get caught. Nothing here is a mockup; the hashes are computed live.
↑ Conservation means every currency nets to exactly zero across all accounts — no money invented or lost. Chain intact means no past entry was altered. Tamper keeps the books *balanced* (changes both sides) — yet the hash-chain still catches it. That's the point: it doesn't trust the editor, it proves the history.