How a round works
The rules, the price feed and exactly what each key can and cannot do. Values marked draft are reference values and will be fixed before launch.
1. The round
- Rounds run back to back on BTC, ETH and HYPE, in three lengths: 5 minutes, 1 hour and 1 day, aligned to UTC.
- You bet on the next round, UP or DOWN, until its lock. Bets are in HYPE, straight from your wallet.
- At the lock, the lock price is the median of the prints inside the lock window.
- At the end, the close price is the median of the prints inside the close window.
- Close above lock: UP wins. Below: DOWN wins. Exactly equal: everyone is refunded.
2. Why the median
A round that settles on one price at one second can be flipped by one spike: a thin moment on the book, a late print, a single bad tick. Taking the median of the prints in a window means a single outlier, or several on the same side, cannot move the result unless they are more than half of the window.
3. Rules
| Rule | Value |
|---|---|
| Assets | BTC, ETH, HYPE (Elysium coins read from the pool to follow) |
| Round lengths | 5 min · 1 hour · 1 day |
| Median window (lock and close) | ±30 s · ±2 min · ±5 min (draft) |
| Prints | one every 10 s; a window needs at least 5 prints (draft) |
| Payout | stake + stake × (losing side × 98%) / winning side |
| Fee | 2% of the losing side, used to buy back and burn $ALY |
| Empty side, tie, or too few prints | everyone refunded in full, no fee |
| Not settled after 24 h | anyone can enable refunds |
| Who settles | anyone; the project runs a keeper that calls it on time |
| Admin powers | no owner, no pause, no upgrade, no key can move pooled funds |
4. The price feed
Prices come from the Hyperliquid public API. A print signer posts each price with the time it was observed. The on-chain log refuses a print that is:
- older than 30 seconds, or timed in the future;
- more than 2% away from the previous print (real larger moves are followed in steps);
- less than 10 seconds after the previous one.
Every raw Hyperliquid response behind a print is stored and served, so anyone can check it.
5. What each key can and cannot do
| Key | Can | Cannot |
|---|---|---|
| Print signer | post prices within the bounds above; stop posting (rounds then refund) | move funds, bet (the round contract rejects bets from it), change a payout except through prints |
| Keeper | open the next round and call settlement on time | anything anyone else cannot do; settlement is permissionless |
| Deployer | nothing after deploy | pause, upgrade, withdraw |
6. What can still go wrong
- The print signer is a trusted key inside its bounds. A wrong but bounded print stream across most of a window can move a result. The raw responses make it visible.
- If Hyperliquid or the signer goes down, rounds without enough prints refund instead of settling.
- Up/Down is a bet. You can lose your full stake.
7. Token
$ALY launches on Elysium. The contract address will be posted here and on X at launch. This will be the only official $ALY; any other CA is not ours.
Alysum is an independent project built on Elysium. It is not affiliated with or endorsed by the Elysium team.