A prediction exchange with every rule on chain.
67 is a prediction exchange on gno.land and one of the startup products I built for the gno.land and AtomOne ecosystem: the idea, the interface and the Gno realm it runs on. You buy Yes or No on real questions with test GNOT on the Onyx testnet, and every price, position and payout lives in one public realm that anyone can read.
Polymarket’s questions, settled on gno.land.
Each market copies its question and resolution rules word for word from Polymarket. The quote follows Polymarket’s midpoint, and every chart draws Polymarket’s own line behind 67’s, so the price can be checked at a glance. 67 never trades on Polymarket: it borrows the question and the result, and holds its own collateral.
How the money moves.
One realm holds everything. gno.land/r/nym-sixseven067/markets holds each market’s collateral, the published quotes, every position and the payouts. The site only reads it and asks Adena to sign, and the same realm can be read and called from gnoweb without the site.
A share pays 1 GNOT if it’s right. A trader signs two calls, Buy and Claim. When the oracle pinned at listing finalizes the result, each winning share pays 1 GNOT, claimed in Portfolio.
The price you reviewed is the price you pay. Buy names the quote it was reviewed at. If the quote changes before the transaction lands, the realm refuses the purchase instead of filling it at a new price.
Results come from Polygon and are signed by a person. A watcher reads each market’s settlement on Polygon every minute through two public RPCs that must agree, and publishes the evidence with its SHA-256. The oracle key never sits on a server: the result is signed in Adena from the status page once the evidence checks out.
Version 2 since 15 October. A service fee, quotes that expire, position limits, a pause, a dispute window before a result is final, and named outcomes.
Buy from the first screen of a phone.
On a phone the trade stays docked at the foot of every market, Buy Yes and Buy No or the two teams, each with its price. The forest scene gives up height before the action does, so the headline and Open markets fit the first screen from 375 × 667 up.
Glass cubes in a night forest.
Transparency is the point of the product, so glass is its material. Shares are glass cubes, emerald for Yes and cobalt for No, and the dearer side lights more of the forest around the balance. No is never red, because No is not an error. The mark is built from the same cubes, with the 7 one block lower.
Handjet for prices and headlines, IBM Plex Sans for reading. Dark only, with every text pair at 4.5:1 or more.
Not affiliated with Gno.land or Polymarket. Test GNOT has no value. Questions, rules and market pictures are Polymarket’s.