Table 2.

Division mode of nodes.

Node name	Node classification	Node function
Common node	Node that reaches credit score η within time t	Can only participate in consensus
Supervision node	2(2f + 1)/3 nodes that first reach credit score λ among ordinary nodes	Can participate in consensus and can record the information of the problem node
Candidate node	2(2f + 1)/9 nodes that first reach credit score μ among ordinary nodes	Can participate in consensus and select the master node from it
Fault node	Nodes that do not reach η score within time t	Cannot participate in consensus