Constant fil_actors_shared::v11::runtime::policy::policy_constants::FAULT_DECLARATION_CUTOFF

pub const FAULT_DECLARATION_CUTOFF: ChainEpoch = _; // 70i64

Minimum period before a deadline’s challenge window opens that a fault must be declared for that deadline. This lookback must not be less than WPoStChallengeLookback lest a malicious miner be able to selectively declare faults after learning the challenge value.