Abstract: An apparatus comprises a first processing node configured to participate in a consensus protocol with a plurality of additional processing nodes. The first processing node is further configured in conjunction with its participation in the consensus protocol to implement repeated polling of respective selected subsets of the additional processing nodes, to resolve a state for a given transaction to a particular one of a plurality of possible states for the given transaction responsive to results of the repeated polling; and to initiate at least one automated action based at least in part on the resolved state for the given transaction. In some embodiments, the first processing node utilizes the results of the repeated polling to maintain a directed acyclic graph or other data structure of transactions that characterizes relationships between the given transaction and a plurality of other transactions.

Abstract: An apparatus comprises a first processing node configured to participate in a consensus protocol with a plurality of additional processing nodes. The first processing node is further configured in conjunction with its participation in the consensus protocol to implement repeated polling of respective selected subsets of the additional processing nodes, to resolve a state for a given transaction to a particular one of a plurality of possible states for the given transaction responsive to results of the repeated polling; and to initiate at least one automated action based at least in part on the resolved state for the given transaction. In some embodiments, the first processing node utilizes the results of the repeated polling to maintain a directed acyclic graph or other data structure of transactions that characterizes relationships between the given transaction and a plurality of other transactions.

Abstract: Techniques for implementing linear view-change with optimistic responsiveness in a BFT protocol running on a distributed system comprising n replicas are provided. According to one set of embodiments, the replicas can execute, during a view v of the BFT protocol, a first voting round comprising communicating instances of a first type of COMMIT certificate among the replicas. Further, when 2f+1 instances of the first type of COMMIT certificate associated with view v have been received by the replicas, the replicas can execute a second voting round comprising communicating instances of a second type of COMMIT certificate among the replicas. If 2f+1 instances of the second type of COMMIT certificate associated with view v are not received by the replicas within a predetermined timeout period, a view change can be initiated from view v to a view v+1.

Abstract: Techniques for implementing linear view-change with optimistic responsiveness in a BFT protocol running on a distributed system comprising n replicas are provided. According to one set of embodiments, the replicas can execute, during a view v of the BFT protocol, a first voting round comprising communicating instances of a first type of COMMIT certificate among the replicas. Further, when 2f+1 instances of the first type of COMMIT certificate associated with view v have been received by the replicas, the replicas can execute a second voting round comprising communicating instances of a second type of COMMIT certificate among the replicas. If 2f+1 instances of the second type of COMMIT certificate associated with view v are not received by the replicas within a predetermined timeout period, a view change can be initiated from view v to a view v+1.