what's CCoinsViewDB::GetHeadBlocks for?
what's CCoinsViewDB::GetHeadBlocks for? I have google a lot, there exists little information, confused with the code comments Retrieve the range of blocks that may have been only partially written. If the database is in a consistent state, the result is the empty vector. Otherwise, a two-element vector is returned consisting of the new and the old block hash, in that order. http://ift.tt/2zNpdnq