The blockchain is an emerging technology that allows multiple parties to agree on a common state without the need for trusted intermediaries. Moreover, business process technology streamlines the automation of inter- and intra-organizational processes while cutting-down on costs. With the new business opportunities provided by blockchains, it becomes vital to combine both technologies to allow the modeling and execution of blockchain-based interactions within business processes. However, the existing business process modeling languages lack support to intuitively model the various interactions with blockchains. In this paper we address this issue by proposing a business process modeling extension that captures the particularities of blockchains. We also show how to transform the proposed constructs into standard-compliant models, and we present an integration architecture that allows external applications, to communicate with the blockchains. Finally, we validate our approach by providing a prototypical implementation that proves its practical feasibility.

区块链是一项新兴技术，允许多方就共同状态达成一致，而无需可信中介。此外，业务流程技术简化了组织间和组织内流程的自动化，同时降低了成本。随着区块链提供的新商机，将两种技术结合起来以允许在业务流程中建模和执行基于区块链的交互变得至关重要。然而，现有的业务流程建模语言缺乏对与区块链的各种交互进行直观建模的支持。在本文中，我们通过提出一种捕获区块链特殊性的业务流程建模扩展来解决这个问题。我们还展示了如何将所提出的构造转换为符合标准的模型，并且我们提出了一种允许外部应用程序与区块链进行通信的集成架构。最后，我们通过提供证明其实际可行性的原型实现来验证我们的方法。