A Customizable dApp Framework for User Interactions in Decentralized Service Marketplaces

Blockchain technology has been utilized in many business cases due to its capability for the development of trustless systems. There is a huge potential for building service marketplaces on top of blockchain technology as decentralized applications (dApps). In such dApps, the point is to exchange and purchase assets and record these transactions on the blockchain to improve the transparency and trust of the marketplace. This work presents a software framework and describes the software prototype implementation, which allows for the provisioning of services on a dApp. The interactions between providers and customers involved in the procurement of services traded on the marketplace are recorded on a distributed ledger. In our dApp, services are provisioned via a configurable auctioning subsystem. Furthermore, after an auction for a service is finished, a Service Level Agreement (SLA) is finalized between a provider and customer. We include a decentralized witness monitoring subsystem to detect Service Level Objective (SLO) violations on this SLA, and witnesses participating in SLA monitoring earn token rewards for their service. Finally, we demonstrate the feasibility of our prototype using state-of-the-art smart contract testing methods.