Research On Off-Chain Multi-Party Payment Methods For Blockchain Scalability

Blockchain technology is a technology that does not rely on third parties.It uses distributed nodes for network data storage,verification,and transmission,thereby greatly changing the security credit model of existing commercial payment systems.This technology has become an important technical support for electronic payments and decentralized finance.However,with the increase in transaction volume demand,public chain systems face low throughput and high transaction costs due to scalability bottlenecks,which makes it incapable of meeting highfrequency payment demands in large-scale application scenarios.Although consortium chains have better transaction performance than public chains,they still can not meet the real-time payment demands of high-concurrency application scenarios due to scalability issues,consensus pressure,and storage burden.To solve these problems,researchers have proposed a payment method based on off-chain scaling.Off-chain scaling is a method of establishing additional networks or layers outside the blockchain,which can improve throughput and reduce costs.However,existing off-chain payment technologies face two challenges.First,the offchain payment protocol of existing public chains faces problems such as single-point failure,low throughput,and high on-chain costs.Second,existing off-chain payment protocols are mainly designed for public chains,while research on off-chain payments for consortium chains is still blank.Therefore,exploring off-chain payment solutions for alliance chains is challenging.The main work is as follows:1)This thesis proposes a high-performance off-chain payment protocol that operates on public blockchain platforms.The protocol aims to achieve fault-tolerance,high throughput and low on-chain overhead for off-chain payment scenarios.Firstly,it guarantees the security of the protocol and fair leader elections through a collateral voting mechanism and an off-chain committee.Secondly,it improves transaction throughput by supporting a high-concurrency offchain transaction execution mechanism.Thirdly,it reduces on-chain costs through microcheckpoints and efficient challenge mechanisms.Finally,this thesis demonstrates the superiority of Hyper Pay over existing protocols through theoretical analysis and experimental evaluation.The protocol solves the problems faced by off-chain payments under the public chain and can meet the high-frequency payment needs in large-scale application scenarios.2)This thesis proposes an off-chain payment solution for the Chain Maker platform,which is designed for the payment scenario of consortium blockchain.This thesis analyzes the differences between public blockchain and consortium blockchain when using off-chain scaling technology,and presents an off-chain payment solution suitable for consortium blockchain scenario.This thesis utilizes the characteristics of the Chain Maker platform,and combines the advantages of off-chain technology such as high efficiency,low latency and privacy protection,to achieve a secure,reliable and efficient off-chain payment system.The solution relies on the consortium blockchain account system to establish an off-chain channel network based on CA certification,and uses an off-chain transaction execution mechanism to unload the verification and execution of transactions to off-chain nodes,achieving high-throughput transactions while effectively alleviating the pressure on on-chain consensus.This solution is the first off-chain payment for consortium blockchain platform,filling the research gap in this field,and has important significance for promoting the application of consortium blockchain technology in the financial sector.