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(0x7fb95f93aad8), guarded_by(0x7fb96ab6adf8), guarded_by(0x7fb96d9bde28), guarded_by(0x7fb9873be9c8)]]
CCoinsViewDB m_dbview;