Terms, as they stood that day
Venues edit resolution criteria in place. A contract you read in March can settle in June on wording that changed in April, and the old text is simply gone.
So the terms are snapshotted daily and hash-chained: each day's record commits to the one before it, which makes a silent edit to the history detectable rather than merely unlikely.
A missed day cannot be backfilled. It is the one asset here that only accrues.