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(0x7fd753b9e318), guarded_by(0x7fd74da5fde8), guarded_by(0x7fd74aa92eb8), guarded_by(0x7fd75311d248)]]
CCoinsViewDB m_dbview;