Realhybrid: A Hybrid Blockchain Consensus With Node-Level Switching

Blockchain consensus can be divided into synchronous consensus and asynchronous consensus according to the network status. In a real network environment, the network status of each node is constantly fluctuating. Hybrid consensus schemes adapt to network fluctuations through switching consensus protocol between asynchronous and synchronous. However, existing schemes are system-level switching, resulting in low efficiency. In this paper, we present Realhybrid, a hybrid consensus scheme with node-level switching, which enables every node to select appropriate consensus protocols based on their network status. We design corresponding protocols for each node to achieve efficient consensus under network fluctuations. Moreover, we establish a Realhybrid network model and quantify the relationship between its performance and system parameters. We conduct experiments on Realhybrid and the results show that it has 29% lower transaction waiting volume and 17% lower transaction confirmation latency compared to other hybrid consensus schemes.