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The deployment and management of Blockchain applications require non-trivialefforts given the unique characteristics of their infrastructure (i.e.,immutability) and the complexity of the software systems being executed. Theoperation of Blockchain applications is still based on ad-hoc solutions thatare error-prone, difficult to maintain and evolve, and do not manage theirinteractions with other infrastructures (e.g., a Cloud backend).  This paper proposes KATENA, a framework for the deployment and management ofBlockchain applications. In particular, it focuses on applications that arecompatible with Ethereum, a popular general-purpose Blockchain technology.KATENA provides i) a metamodel for defining Blockchain applications, ii) a setof processes to automate the deployment and management of defined models, andiii) an implementation of the approach based on TOSCA, a standard language forInfrastructure-as-Code, and xOpera, a TOSCA-compatible orchestrator. Toevaluate the approach, we applied KATENA to model and deploy three real-worldBlockchain applications, and showed that our solution reduces the amount ofcode required for their operations up to $82.7\%$.

A Declarative Modelling Framework for the Deployment and Management of Blockchain Applications