A Method of Logic-Based Smart Contracts for Blockchain System.

Recently, blockchain systems have attracted intensive attentions from academia, industrial circles and governments, which make smart contract a hit since it is an important research topic for blockchain system. We propose a logic-based smart contract model Logic-SC for blockchain system based on semantics and syntax of Active-U-Datalog with some temporal extensions. Logic-SC model owns a triggering mechanism by temporal active rules, which can satisfy the expressiveness and flexibility of the smart contracts for blockchain system. The paper introduces the rules, structure of contracts and implementation of the model. Finally, an application is exampled to show the effectiveness of the model.