A Time Bank System Design on the Basis of Hyperledger Fabric Framework

This paper designs and realizes a Blockchain-based Time Bank system on the basis of Hyperledger Fabric framework which is one of the permissioned blockchain networks. All of the services provided by existing Time Bank systems were recorded and conducted manually in the past. Also, jobs for matching these services were also managed by people. This way of running Time Bank costs lots of time and human resources and lacks security. This paper proposes a Time Bank system enabling all the services being executed and recorded on the blockchain. The matching tasks can directly be done through autonomous smart contracts. In addition, building a Time Bank system on blockchain benefits the transaction of" Time Credit" which plays the role of digital currencies on the system. Our Time Bank also retains a grading system allowing its members to give each other a grade for reflecting their degree of satisfaction about the results provided the system. This grading system can incentivize the members to provide a better quality of service and adopt a nicer attitude for receiving a service, which may positively endorse the development of a worldwide Time Bank system.