Add method to retrieve local filename

boltrest.go

@@ -65,6 +65,11 @@ func (b *DB) Close() error {
 	return err
 }
 
+// GetFilename returns the local file for the DB
+func (b *DB) GetFilename() string {
+	return b.localFile
+}
+
 // Offline sets this DB to offline mode
 // That means it won't try to sync anything
 func (b *DB) Offline() {