부산대학교 도서관

To alleviate the pressure on storage and execution on blockchain, existing platforms such as Ethereum have designed payment channels, attempting to transfer some of the pressure to off chain. Consistency protocols such as “lock-submit” based on asset are used to ensure consistency between on chain and off chain. However, the increasing number of multi-property-right and multi-attribute assets pose challenges to the parallel performance of existing payment channels. This paper proposes an on chain and off chain consistency protocol for multi-attribute digital assets based on data property rights. Firstly, we use a hypergraph to store asset contents off chain. Also, we use an index MMI (multi-property-right and multi-attribute index) on chain to store the relationship between accounts and assets, partial information of assets. Secondly, a multiparty payment channel is opened, verifiers verify the legitimacy of the transaction request based on the attribute state list in MMI and allow collaborative attribute modification on and off chain. Finally, nodes merge assets based on asset version numbers to ensure the consistency and security of asset content. After experiments, our consistency protocol has a success rate of 99.68% after asset merging, and the performance of execution can be improved by about 14%-29%, throughput can be improved by about 6%-14%, and the transaction size in the block is smaller.