db: add StoragePath to CDBWrapper/CCoinsViewDB

This is used in subsequent commits. It allows us to clean up UTXO
snapshot chainstate after background validation completes.

1 files changed, 18 insertions, 0 deletions

diff --git a/src/dbwrapper.h b/src/dbwrapper.h
index 665eaa0e98..1052da01d5 100644
--- a/src/dbwrapper.h
+++ b/src/dbwrapper.h
@@ -39,6 +39,10 @@ public:
 
 class CDBWrapper;
 
+namespace dbwrapper {
+    using leveldb::DestroyDB;
+}
+
 /** These should be considered an implementation detail of the specific database.
  */
 namespace dbwrapper_private {
@@ -219,6 +223,12 @@ private:
 
     std::vector<unsigned char> CreateObfuscateKey() const;
 
+    //! path to filesystem storage
+    const fs::path m_path;
+
+    //! whether or not the database resides in memory
+    bool m_is_memory;
+
 public:
     /**
      * @param[in] path        Location in the filesystem where leveldb data will be stored.
@@ -268,6 +278,14 @@ public:
         return WriteBatch(batch, fSync);
     }
 
+    //! @returns filesystem path to the on-disk data.
+    std::optional<fs::path> StoragePath() {
+        if (m_is_memory) {
+            return {};
+        }
+        return m_path;
+    }
+
     template <typename K>
     bool Exists(const K& key) const
     {