区块链环境下的预制菜溯源研究

Research on traceability of precooked dishes in blockchain environment

提出一种基于以太坊智能合约的预制菜溯源模型。分析当前预制菜存在的问题,如食品安全性难以保证、没有统一标准和食品出现问题难溯源的情况。通过区块链去中心化、不可篡改和可溯源等特点实现基于以太坊的预制菜溯源模型。模型规定每个环节负责人都需对自身负责的环节项目进行数字签名,从而确保出现问题时的责任划分。同时,为减少在以太坊的存储开销,设计一种基于IPFS(inter planetary file system)和默克尔树的存储机制。实验结果表明:模型能够在正常开销范围内实现预制菜全流程,同时,模型在以太坊的存储开销低于直接存储,具备一定优越性。

In recent years,with the increasingly accelerated pace of people’s lives,the precooked food has gained a fast growing popularity among consumers both at home and abroad.However,the precooked food industry is yet to develop unified standard,certification system and traceability system.This paper proposes an Ethernet-based smart contract traceability model for precooked food.First,the current problems of the precooked food industry are analyzed:food safety is hardly guaranteed;a uniformed standard and a food traceability system are both missing.Then,the Ethernet-based precooked food traceability model is built through the characteristics of blockchain decentralization,tampering and traceability.The model stipulates that the persons in charge at each link should leave their digital signatures,ensuring the clear division of responsibilities when problems occur.Meanwhile,to reduce the storage overhead in Ethernet,a storage scheme based on IPFS and Merkel Tree is designed.Finally,our experimental results show the model goes through the whole process of making the precooked food and keeps the overhead within the normal range.Moreover,the model in Ethernet further cuts down the storage overhead compared with the direct storage,demonstrating its certain advantages.