## 4 Case Study Implementation Using Hyperledger Fabric
Since the participants are known to one another and all actions, whether submitting application transactions, modifying the configuration of the network are recorded on the blockchain following an endorsement policy that was established for the network and relevant transaction type. Additionally, as a consequence, any guilty party can be easily identified and the incident handled in conformity to the terms of the governance model. Another experiment on the resource utilization of the blockchain network using the Hyperledger Caliper was performed in five iterations. The resource utilization test results describe the maximum, average usage rate of the memory and central processing unit (CPU), as shown in Figure 10:1 For the peer, the average memory allocation was recorded to be 97.35 MB, and the average CPU utility was recorded to be 5.77%. For the orderer node, the average memory allocation was recorded to be 26.4 MB, and the average CPU utility was recorded to be 1.25%. For the CA node, the average memory allocation was recorded to be 5.5 MB, and the CPU utility was recorded to be 0%. The result of the resource utilization experiment demonstrates that the blockchain network has a low rate of the system resources occupation, high reliability, and comfortable user experience. ## 7 Conclusions

The approach presented herein is based on smart contracts for the automated management of SLAs in the field of the sharing economy. It automatically enforces the payment of the defined subscription fee or the monetary compensation in the case of an SLA violation. All involved parties get to know which entity has breached the SLA, and each party can explore every transaction. Moreover, different facets of the SLA management have been incorporated in the approach, such as the SLA definition, negotiation, and termination. A notebook sharing case study is implemented as the proof of concept on top of the proposed architecture by using the Hyperledger Fabric. We evaluate the system performance in different performance metrics, which indicate a steady level, allowing an effective transaction throughput. Although the coevolution of the blockchain and SLA research studies is still in its infancy, it is the goal of this work to explore the potential applications to improve efficiency and bring automation, to revolutionize robust business solutions in various sharing economy scenarios. The future research direction of this work is to monitor the terms of the SLA and resources while guaranteeing the integrity of the monitored data to verify whether the SLAs are being complied or not. Moreover, businesses considering the blockchain-enabled SLA management have to discuss the \begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline
**Type** & **Name** & **Memory (Max)** & **Memory (Avg)** & **CPU (Max)** & **CPU (Avg)** & **Traffic In** & **Traffic Out** \\ \hline Docker & peer0 & 107.0 MB & 103.2 MB & 11.46\% & 5.53\% & 4.8 MB & 4.5 MB \\ Docker & peer1 & 95.6 MB & 89.7 MB & 13.65\% & 6.55\% & 5.2 MB & 5.5 MB \\ Docker & peer2 & 114.3 MB & 108.0 MB & 13.92\% & 5.24\% & 5.6 MB & 11.5 MB \\ Docker & peer3 & 92.6 MB & 88.7 MB & 12.95\% & 5.75\% & 5.0 MB & 5.6 MB \\ Docker & orderer & 36.6 MB & 26.4 MB & 5.16\% & 1.25\% & 5.1 MB & 13.2 MB \\ Docker & ca0 & 5.5 MB & 5.5 MB & 0.00\% & 0.00\% & 526 B & 0 B \\ Docker & ca1 & 5.5 MB & 5.5 MB & 0.00\% & 0.00\% & 456 B & 0 B \\ \hline \hline \end{tabular}
\end{table} 
Table 4: Resource utilization evaluation of the blockchain network. security issues related to smart contracts. More standard templates and security-auditing protocols are required to improve the quality of the smart contracts. [PERSON] conceived the idea for this paper, designed the experiments and wrote this paper; [PERSON]-H.K. conceived the overall idea of the paper and proofread the manuscript.