An important feature of blockchain technology is that all participants jointly\nmaintain transaction data and can achieve mutual trust relationships without\nintegrated control, which relies on distributed consensus algorithms. Practical\nByzantine Fault Tolerant algorithm (PBFT) is a fault-tolerant algorithm based\non state machine replication, which solves the Byzantine error, that is, the\nmalicious behavior of nodes. In PBFT, all participating nodes are divided into\nthe primary node and backup nodes. When this primary node commits evil\nor fails, it will elect a primary node again for message communication. The\ngenetic algorithm (GA) is a computer simulation study inspired by the natural\nbiological genetic evolution criterion â??natural selection, survival of the fittestâ?.\nGenetic algorithm is actually a method to find the optimal solution.\nAccording to it, the best primary node is selected in the PBFT algorithm to\nimprove consensus efficiency.
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