An Implementation of Blockchain Decentralized Application for Industrial IoT Scenarios

Blockchain Decentralized Applications (Blockchain Dapps or Dapps in short) have been implemented in many different industrial applications, including recent Industrial Internet-of-Things (IIoT) and Cyber Physical Systems (CPS). In this paper, we propose an architectural design that integrates both a permissioned blockchain network and an IIoT infrastructure for establishing a decentralized IIoT data marketplace. The decentralized IIoT data marketplace allows both data providers and data consumers, to share the available IIoT datasets without any centralized third-party user authorization. First, our proposed Dapp is enabled to connect with a time series database that is considered as a persistent storage of IIoT machine and sensor data. Second, by defining the written data via a smart contract, we ensure that all transactional records between data providers and data consumers are traceable and immutable. Third, we deploy a distributed file system in our proposed architecture to strengthen data privacy by converting the output results into cryptographic hashes. Besides, we demonstrate the designated role-based web user interfaces (UIs) for our proposed Dapp. Finally, we perform an experimental study by utilizing a time series database benchmark tool as an exemplary IIoT system to evaluate the effectiveness and efficiency of our proposed Dapp.