The lowest level of the CoinsViews cache hierarchy sits in a leveldb database on disk. All unspent coins reside in this store.
Declared in <validation.h>
[[guarded_by(0x7ff37b804a38), guarded_by(0x7ff375b4b648), guarded_by(0x7ff37df87568), guarded_by(0x7ff391af2d88)]]
CCoinsViewDB m_dbview;