Das Contract - A Visual Domain Specific Language for Modeling Blockchain Smart Contracts

A Blockchain (BC) is a technology that introduces a decentralized, replicated, autonomous, and secure databases. A smart contract (SC) is a transaction embedded in the blockchain that contains executable code and its internal storage, offering immutable execution and record keeping. The SC has enormous potential in automating traditional paper contracts and encoding contract logic into program code. Thus, replacing the role of a notary and a central authority. It may dramatically reduce an effort with administration workload and enforcement of such contracts. In this paper, we propose a new visual domain specific language that can capture the SC in a user-friendly way and eliminate the errors associated with programming since the SC code is automatically generated from models. Finally, an open-source proof-of-concept environment for designing and generating the SC is introduced to demonstrate the feasibility of proposed concepts.