C0103 fixes 4, datastore and db_store changes

This PR is dependent on #1110.
Though this change looks benign, there is good chance it will cause trouble, through no fault of your own. Search for the text `findNodeResponse` on the `node` folder; you will see this function is nowhere called literally; perhaps it is invoked in some peculiar way (it may also be dead code). Do you mind undoing this particular renaming?