make key encoding utils to closure style
make key encoding utils to closure style

kakadiya91/ydn-db,kakadiya91/ydn-db,yathit/ydn-db,kakadiya91/ydn-db,yathit/ydn-db,yathit/ydn-db,yathit/ydn-db,kakadiya91/ydn-db,yathit/ydn-db,kakadiya91/ydn-db