Variable ValidatorConfig.max_preimage_reveal
How far in the future (in unit of blocks) pre-images can be revealed
For example, if a validator enrolled at block #100, expiring at block #200, has this value set to 10, it will gossip pre-image for height #152 as soon as block #142 is externalized.
Increasing this value allow to be more tolerant to long outage, at the expense of encrypted Votera ballots being readable earlier, and a minor increase in predictability.
By default, the value is set to 6, which, with CoinNet defaults, is equivalent to an hour.