Massive internet of things (IoT) data generated by IoT edge devices are shaping the data economy. Monetizing the stream of IoT data has enabled the development of IoT data trading systems, which allow individuals to sell and exchange data. This article presents a blockchain-based system for IoT data trading using fog computing. We propose crowdsourcing fog nodes on the edge network to communicate and collect data from IoT edge device owners. This paper focuses on developing a secure and dependable blockchain-based system that allows data providers and consumers to engage in data trading process. Through experimental results, we evaluate the performance of the proposed model with respect to transaction throughput, latency, and resource consumption metrics under varied scenarios and parameters using Hyperledger blockchain.
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