CONSENSUS METHOD, APPARATUS, AND SYSTEM FOR BLOCKCHAIN BASED ON BYZANTINE FAULT TOLERANCE ALGORITHM

摘要

A consensus method, apparatus, and system for a blockchain based on a Byzantine fault tolerance algorithm are provided in embodiments of the present specification. The method includes: introducing a last block hash into a consensus protocol by taking advantage of different characteristics of the last block hash in a distributed ledger maintained by forked nodes and non-forked nodes, generating, by respective nodes, a proposal digest based on respective last block hashes, and verifying, according to the proposal digest, consistency between last blocks of the respective nodes and a node that initiates a consensus proposal, to ensure that the nodes participating in a consensus reach a consensus based on a consistent last block.