bitcoin++
§ Project file

Stammtisch21

The permanent record for this hackathon project: write-up, links, team, tags, and prizes.
Submitted money in movement
Guess the price, shake on a bet, split the tab — signed on Nostr. The pot is held by nobody. Every payment goes out exactly once.
The write-up

Stammtisch21 is the regulars‘ table at a German pub, and what Einundzwanzig meetups are called. Stammtisch21 covers what happens there with money. A forecast page grades Glimpse’s Bitcoin markets hour by hour, and the record is anchored in Bitcoin. Guess the price and the winner is paid over Bark — exactly once, even if the payout is triggered twice. Two people bet through one pot on Arkade that neither they, the oracle nor the server can take alone. The tab in the Einundzwanzig Meetup App nets a whole evening down to the few payments that are really owed, each paid once. Prizes and bets have run with real sats on mainnet.