Consensus methods and systems in consortium blockchain

A non-transitory, computer-readable medium storing one or more instructions executable by a computer system to perform operations comprising:

• in response to a determination that a first consensus node in a consensus network did not complete a consensus operation on target data on which a consensus is to be reached within a predetermined period, broadcasting, by the first consensus node in the consensus network of a consortium blockchain, a ViewChange message in the consensus network based on a P set and a Q set constructed from at least one ECHO message received, wherein the first consensus node is a consensus node other than a first consensus primary node corresponding to a current view of the consensus network when the ViewChange message is triggered, and the at least one ECHO message received by the first consensus node is broadcast by a consensus node in the consensus network for the target data on which the consensus is to be reached;
• sending, by a second consensus node in the consensus network, a view change acknowledgment (ViewChangeACK) message corresponding to the ViewChange message received by the second consensus node to a second consensus primary node in the consensus network for the ViewChange message received, wherein the second consensus primary node is a consensus primary node after the first consensus primary node;
• in response to a determination that the second consensus primary node receives N−f−2 ViewChangeACK messages sent by consensus nodes in the consensus network, obtaining, by the second consensus primary node, a plurality of identical P sets and a plurality of identical Q sets in the ViewChange message received, wherein f is a maximum quantity of abnormal consensus nodes allowed in the consensus network;
• and
• making, by the second consensus primary node, a view change decision based on the plurality of identical P sets and the plurality of identical Q sets in the ViewChange message received.

A computer-implemented system, comprising:

• one or more computers;
• and
• one or more computer memory devices interoperably coupled with the one or more computers and having tangible, non-transitory, machine-readable media storing one or more instructions that, when executed by the one or more computers, perform one or more operations comprising:
• in response to a determination that a first consensus node in a consensus network did not complete a consensus operation on target data on which a consensus is to be reached within a predetermined period, broadcasting, by the first consensus node in the consensus network of a consortium blockchain, a ViewChange message in the consensus network based on a P set and a Q set constructed from at least one ECHO message received, wherein the first consensus node is a consensus node other than a first consensus primary node corresponding to a current view of the consensus network when the ViewChange message is triggered, and the at least one ECHO message received by the first consensus node is broadcast by a consensus node in the consensus network for the target data on which the consensus is to be reached;
• sending, by a second consensus node in the consensus network, a view change acknowledgment (ViewChangeACK) message corresponding to the ViewChange message received by the second consensus node to a second consensus primary node in the consensus network for the ViewChange message received, wherein the second consensus primary node is a consensus primary node after the first consensus primary node;
• in response to a determination that the second consensus primary node receives N−f−2 ViewChangeACK messages sent by consensus nodes in the consensus network, obtaining, by the second consensus primary node, a plurality of identical P sets and a plurality of identical Q sets in the ViewChange message received, wherein f is a maximum quantity of abnormal consensus nodes allowed in the consensus network;
• and
• making, by the second consensus primary node, a view change decision based on the plurality of identical P sets and the plurality of identical Q sets in the ViewChange message received.