Gifflar: a framework to generate smart contracts on the fly.

Blockchain is a disruptive technology that offers a secure decentralized network, allowing for direct transactions between distributed entities, without the need for a trusted third party. Smart contracts are executable codes hosted on the blockchain which enables the implementation of several decentralized applications, in different domains. Due to the complexity of the contract's construction, it is necessary to seek ways to facilitate and make this innovative development process robust. This paper presents Gifflar, a framework for generating smart contract code on the fly, in such a way that it allows a system to write, compile and implement blockchain contracts with a decentralized application still running. The framework is structured in components that implement design patterns to better define the responsibility of each one of the parts and exports a simple interaction module for modeling contracts in JSON and automatic code writing using the TypeScript language. As far as we know, this framework is one of the first to allow contract code generation dynamically at run time. Thus, the work contributes to the state of the art by addressing a new paradigm, where systems can act as smart contract developers.