Core
Take a core from any vault
Paste an ERC-4626 vault on Robinhood Chain. This reads the chain from your browser — no key, no proxy, no server — and reports how much of that vault's price history is recoverable from the log, where the holes are, and whether it writes a record of its own.
Try one from the census. A Varve is recognised automatically and
its chronology() is verified against the layers as well.
What it does
It confirms the address answers the ERC-4626 interface, walks every Deposit and
Withdraw it has ever emitted, and computes the conversion rate each one pins. Then it asks the
node for the same vault's price at a block behind the state horizon, and shows you the answer.
If the vault is a Varve it does one more thing: it replays the Layer logs, recomputes the
accumulator, and compares it against chronology(). That comparison is the whole argument in one
line — a history the node can no longer answer for, checked against a word it still holds.