Constant hotshot_types::constants::UPGRADE_PROPOSE_OFFSET

pub const UPGRADE_PROPOSE_OFFSET: u64 = 5;

The offset for how far in the future we will send out a QuorumProposal with an UpgradeCertificate we form. This is also how far in advance of sending a QuorumProposal we begin collecting votes on an UpgradeProposal.