Performance and Cost Evaluation of Smart Contracts in Collaborative Health Care Environment

Abstract

Blockchain emerged as a solution for data integrity, non-repudiation, and availability in different applications. Data sensitive scenarios, such as Health Care, can also benefit from these blockchain properties. Consequently, different research proposed the adoption of blockchain in Health Care applications. However, few are discussed about incentive methods to attract new users, as well as to motivate the system or application usage by existing end-users. Also, little is discussed about performance during code execution in blockchains. In order to tackle these issues, this work presents the preliminary evaluation of TokenHealth, an application for collaborative health practice monitoring with gamification and token-based incentives. The proposed solution is implemented through smart contracts using Solidity in the Ethereum blockchain. We evaluated the performance of both in Ropsten test network and in a Private instance. The preliminary results show that the execution of smart contracts takes less than a minute for a full cycle of different smart contracts. Also, we present a discussion about costs for using a Private instance and the public Ethereum main network.

Multi-level consensus algorithm for appendable-block blockchains in IoT Environments

“…Moreover, during the PhD, it was possible to participate in three different research projects about blockchain with companies: with a financial institution and with two software development companies. These projects helped to understand important aspects that should be considered for the adoption of blockchains in real scenarios [Branco et al 2019, Lunardi et al 2019b, Branco et al 2020. Finally, the proposed Framework -called SpeedyChain -was registered as software in the National Institute of Industrial Property (INPI), entitled "SpeedyChain -A framework for decoupling data from blockchain" and with process number BR512018001343-0 .…”

Context-based Smart Contracts For Appendable-block Blockchains

“…Blockchain also offers other benefits, including audibility, transparency, and the possibility to have decentralized applications (dApps) [3]. The combination of those benefits allows to use blockchain in multiple domains, such as financial operations [4], supply chain [5], Internet of Things (IoT) [6] [7], health care [8], smart vehicles [9], smart cities [10] [11] and others [12].…”

Context-based smart contracts for appendable-block blockchains

“…Blockchain also offers other benefits, including audibility, transparency, and the possibility to have decentralized applications (dApps). The combination of those benefits allows to use blockchain in multiple domains, such as financial operations [3], supply chain [4], Internet of Things (IoT) [5], health care [6], smart vehicles [7], smart cities [8] and others [9].…”