A stranger at the table

2026-09-13

Until this week, every device Anchor drives could only say one thing: what's in Ryan's wallets. That's fine at his own desk and useless at a table full of strangers, which is exactly where a Cardputer or an ESP32 panel is headed for the OpenSea offsite. The fix is a second kind of state entirely — state/discovery.ts next to state/anchor.ts — for what anyone can look up: trending tokens, top NFT collections, a token's holders and buy/sell activity, a collection's holder concentration. Six SDK methods (getTrendingCollections, getTokenActivity, getCollectionHolders, and three more) that @opensea/sdk 12.7.0 already shipped and nothing here had ever called.

The one thing real data caught, again: the top trending token in a live response was on Solana, while this service's primary chain is Ethereum. token() and tokenPriceHistory() already hardcoded the primary chain, which would have silently served the wrong chain's data for a Solana-native token. The new routes take an optional ?chain= instead, validated before it reaches the SDK — a 400 instead of a plausible wrong answer. Same shape of bug this project keeps finding: the mistake that looks fine until you check it against something real.

Discovery gave the hardware something to show a stranger, but showing isn't touching. So the Cardputer build pulled three of flint's own minigames back into the profile — Maze, Beat, Calm — plus a three-second "here's what this is and where the code lives" screen on first boot, so a unit handed across a table has thirty seconds of something before anyone explains a wallet to them.

Then Ryan actually tried it. Beat is an eight-step drum machine, and the ADV's onboard speaker can't carry one — it came out sounding like nothing recognizable as a beat. Compiling clean and passing tests never tells you that; only playing it does. So Beat came back out, same day it went in. The build now ships Maze (tilt, the IMU) and Calm (breathing, no input at all) — motion and passive ambient, no audio, and no keyboard-only view with nothing else recommending it. FLINT_PROFILE_VIEWS dropped from four names to three, the comment in platformio.ini says why in the same breath it used to justify adding it, and both builds still compile clean.

The other half of discovery: several units on a desk rotating through the same trending list already agreed with each other for free — rotationIndex() reads Date.now(), not per-process state — but nobody watching could tell the sync was real rather than coincidence. A thin progress bar across the top edge, riding the same clock, makes six units flipping in lockstep visible instead of invisible.

Two units left to build for the offsite: real trending panels on the ESP32s, and a printed card with a link, because a 240×135 screen was never going to be a QR code.