[bitcoin/bitcoin] BIP 158: Compact Block Filters for Light Clients (#12254)

jimpo commented on this pull request.

> @@ -6,6 +6,7 @@
#ifndef BITCOIN_UNDO_H
#define BITCOIN_UNDO_H

+#include

It’s required because `blockfilter.h` includes `undo.h` and won’t compile otherwise. This could be moved to separate commit though.