An optimized proof of stake consensus strategy

Abstract

As a decentralized distributed ledger technology,the main function of blockchain is to reach a consensus among untrusted nodes.In the blockchain,a suitable consensus mechanism can improve the blockchain performance and guarantee transaction data security.This paper proposes a new solution strategy for the “nothing at stake” problem in the Proof of Stakes(PoS).This strategy allows voting nodes to send agreement disagreement votes.If the node votes for a fork and the fork wins,the node will gain the profit.Otherwise,if the node votes against a fork and the fork fails,the node will also gain the profit.A smart contract is deployed on the Ethereum platform to validate the voting strategy.Results show that the proposed strategy can run normally and the nodes finally reach consensus.