Verify a bet

This page recomputes a result in your browser with the same code the server uses (fair-games.js). It never trusts a number sent by the server: it works out its own result from the seeds and compares the two.

Check a result

Game Every game of this site. Server seed Revealed on the Fair page when you start a new seed pair. Client seed Your own seed of that pair. Params (JSON) What you chose for the bet (target, mines, difficulty …). Nonce The number of the bet with that pair, counted from zero. Edge % The house edge the bet was placed with.

How to check a bet, step by step

Open the bet. Every bet and every faucet claim in the app has a Verify link. It opens this page with the game, your client seed, the nonce and your choices filled in.
Reveal the server seed. Before a bet you only see the hash of the server seed. Start a new seed pair on the Fair page and the old seed is shown: it must hash to the value you saw first.
Compare. Press Verify. The page derives the floats, maps them to the result of the game and says whether it matches what the server stored.

floats = HMAC-SHA256(server seed, "client seed:nonce:cursor"), 4 bytes each ÷ 2^32

Step-by-step games (Mines, Tower, Chicken, Blackjack, Hi-Lo) are checked on what was drawn when the round began: the mines, the traps, the lane, the deck.

What a match proves, and what it does not

A match proves that the result came from the seed pair fixed before the bet: nobody could change it after seeing your choices. It does not make a game favourable. The house games keep a house edge of 3%, so the expected result of playing is a loss.

The numbers behind the site are public as well: see the live economy and the games.