This refactor converts the existing (NumberFor<Block>, NumberFor<Block>) into a dedicated BlockGap<NumberFor<Block>> struct. This change is purely structural and does not alter existing logic, but lays the groundwork for the follow-up PR.
The compatibility concern caused by the new structure is addressed in the second commit.
Previously, block gaps could only be created by warp sync, but block gaps will also be generated by fast sync once #5406 is fixed. This PR is part 1 of the detailed implementation plan in https://github.com/paritytech/polkadot-sdk/issues/5406#issuecomment-2325064863: refactor
BlockGap.This refactor converts the existing
(NumberFor<Block>, NumberFor<Block>)into a dedicatedBlockGap<NumberFor<Block>>struct. This change is purely structural and does not alter existing logic, but lays the groundwork for the follow-up PR.The compatibility concern caused by the new structure is addressed in the second commit.
cc @dmitry-markin