Type Alias UpgradeGoAheadSignal

UpgradeGoAheadSignal: StorageDescriptor<[Key: number], UpgradeGoAhead, true>

This is used by the relay-chain to communicate to a parachain a go-ahead with in the upgrade procedure.

This value is absent when there are no upgrades scheduled or during the time the relay chain performs the checks. It is set at the first relay-chain block when the corresponding parachain can switch its upgrade function. As soon as the parachain's block is included, the value gets reset to None.

NOTE that this field is used by parachains via merkle storage proofs, therefore changing the format will require migration of parachains.