Voids & refunds
When a round can't be settled honestly, nobody wins or loses on it.
A round voids when:
- No price at the bell. The close must be sampled within 8 seconds after the bell (
sampleWindowSecs = 8), on the Hyperliquid clock. A keeper that was down for the bell can't settle on a later price. - A tie. HYPE closes exactly on the strike.
- An abandoned round. If a round is still unsettled 120 seconds after its bell, anyone can call
voidStale(round). A dead keeper can't freeze money.
What a void pays
A void refunds every holder exactly what they paid for the shares they still hold, their cost basis. It isn't "half a share each side", which would move money between UP and DOWN players.
If you bailed part of a position before the void, the refund follows: the cost basis leaves with the shares you sold, pro rata, and you get back the basis of what's left.
The test suite covers both a full refund and a refund after a partial bail.