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-rw-r--r--src/index/base.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/src/index/base.h b/src/index/base.h
index 3fab810bb2..1063291480 100644
--- a/src/index/base.h
+++ b/src/index/base.h
@@ -21,6 +21,13 @@ class CBlockIndex;
class BaseIndex : public CValidationInterface
{
protected:
+ /**
+ * The database stores a block locator of the chain the database is synced to
+ * so that the index can efficiently determine the point it last stopped at.
+ * A locator is used instead of a simple hash of the chain tip because blocks
+ * and block index entries may not be flushed to disk until after this database
+ * is updated.
+ */
class DB : public CDBWrapper
{
public: