Abstract: A system may include a remote server and an on-premises node. The server may receive a first set of parameters defining a blockchain operation. The server may generate an operation payload based on the parameters. The on-premises node may receive the operation payload from the computing server and decode the operation payload to extract a second set of parameters reflected in the operation payload. The on-premises node may compare the second set of parameters to the first set of parameters to determine whether the second set matches the first set. If the parameters match, the on-premises node may sign cryptographically the operation payload and transmit the operation payload to the computing server for the computing server to broadcast the operation payload to a blockchain to carry out the blockchain operation.

Abstract: The system is a scalable, flexible, and extensible platform for building, deploying, and managing distributed applications that interact with multiple blockchain technologies. The system implements well-defined and well-managed microservices to encapsulate functionality, isolate sensitive data, enable responsive and efficient scaling, and provide a framework for future improvements and support for future blockchain technologies. The system in one embodiment uses an event-driven architecture to construct fast, responsive systems, but still provide support for alternate modes of operation. The system exposes high-level abstractions of the foundational elements of distributed applications in a powerful, well-understood programming environment to simplify development of extensions, adapters, and applications.