Originally published on xroot.dev.
I spent a day reading Robinhood Chain with eth_call instead of reading about it. Three things turned up that no documentation page mentions — and one of them is a mistake I made first.
Robinhood Chain went live on 1 July 2026: an Arbitrum Orbit L2 settling to Ethereum, ETH for gas, ~0.02 gwei, and — unusually for a chain run by a regulated US brokerage — genuinely permissionless deployment. That much the docs say, and all of it checks out.
What follows is the part that only shows up if you query the chain yourself. Each finding is also a lesson about a different way of trusting the wrong artefact: a marketing page, an ABI, and a getter. The through-line is the same one that runs through parsing raw AMM accounts instead of using an SDK: prefer evidence the subject cannot author.
Establishing Ground Truth in Three Calls
