This runtime API is used to inform potential block authors whether they will
have the right to author at a slot, assuming they have claimed the slot.
In particular, this API allows Aura-based parachains to regulate their "unincluded segment",
which is the section of the head of the chain which has not yet been made available in the
relay chain.
When the unincluded segment is short, Aura chains will allow authors to create multiple
blocks per slot in order to build a backlog. When it is saturated, this API will limit
the amount of blocks that can be created.
This runtime API is used to inform potential block authors whether they will have the right to author at a slot, assuming they have claimed the slot.
In particular, this API allows Aura-based parachains to regulate their "unincluded segment", which is the section of the head of the chain which has not yet been made available in the relay chain.
When the unincluded segment is short, Aura chains will allow authors to create multiple blocks per slot in order to build a backlog. When it is saturated, this API will limit the amount of blocks that can be created.