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Blockchain Oracles: A Framework for Blockchain-Based Applications

2020; Springer Science+Business Media; Linguagem: Inglês

10.1007/978-3-030-58779-6_2

1865-1356

Kamran Mammadzada, Mubashar Iqbal, Fredrik Milani, Luciano García‐Bañuelos, Raimundas Matulevičius,

Cloud Computing and Resource Management

Oracles support the access, validation, and transmission of data from external sources to blockchain systems. They are important components of blockchain-based architectures. However, there exists no guidance on how oracles could be used when designing blockchain-based applications. In this paper, based on the results of a systematic literature review, we propose a framework to explain blockchain oracles and their relationships to blockchain-based applications. More specifically, the blockchain oracle framework addresses the origin of data, oracle properties, encryption method, oracle data source, validation procedures, and the integration of oracles to blockchain-based applications. Potentially, this framework can guide developers when incorporating oracles to blockchain-based applications.