  IoT cloud enabled societal applications have dramatically increased in the
recent past due to the thrust for innovations, notably through startup
initiatives, in various sectors such as agriculture, healthcare, industry, and
so forth. The existing IoT cloud solutions have led practitioners or
researchers to a haphazard clutter of serious security hazards and performance
inefficiencies. This paper proposes a blockchain enabled IoT cloud
implementation to tackle the existing issues in smart cities. It particularly
highlights the implementation of chaincodes for air quality monitoring systems
in SmartCities; the proposed architecture named as IoT enabled Blockchain for
Air Quality Monitoring System (IB-AQMS) is illustrated using experiments.
Experimental results were carried out and the findings were disclosed in the
paper.
