Concise Consortium Blockchain Consensus Algorithm with Pattern Conversion Support

In view of the engineering and algorithm conflicts in the application process of alliance chains, this article analyzes the threat risks faced by public and alliance chains, and summarizes their differences. By analyzing the typical alliance chain consensus algorithms of CFT and BFT, we propose a simple consensus algorithm (SCA) for blockchain. The algorithm is designed from the perspectives of participation roles, view switching, transaction consensus, and model analysis, and can achieve efficient view switching and transaction consensus through a three-part minimal structure. It can support the conversion between CFT and BFT through consensus threshold definitions, with the shortest execution period and fastest consensus efficiency. After in-depth analysis, the algorithm has a fault tolerance rate of no less than N/3, which is significantly better than the PBFT algorithm in terms of processing performance, while resisting existing threats to the consortium chain.