A Secure And Efficient Supply Chain Scheme Via Blockchain-based Smart Contract

Supply chain is a chain structure formed among suppliers,producers,retailers and consumers in the process of producing and selling goods.In recent years,with the rise of globalization,people's demand for fairness,privacy,security and efficiency of the supply chain is significantly improved.However,there are still some problems in many aspects of the supply chain.For example,upstream and downstream have asymmetric understanding of the demand and sales volume of goods in the information flow.Besides,in the process of goods circulation,it is difficult for consumers to trace the source enterprises when they buy substandard goods.And in the capital flow,when the upstream and the downstream enterprise trade with each other,the fund default often occurs.However,most of the current research work is only devoted to solve the problem of tracing the source of goods in the logistics.There are few studies on the information opacity and asymmetry of upstream and downstream enterprises in information flow,and the default of funds in capital flow.Therefore,to solve the above problems,we propose a supply chain scheme via blockchain-based smart contract.The main research work of this paper is as follows:· An efficient supply chain framework via blockchain is proposed.As far as we know,this is the first framework to ensure the fairness and security of information flow,logistics and capital flow at the same time.Firstly,the bidding mechanism is intro-duced in the blockchain to ensure the transparency of supply and demand informa-tion.More important,it provides the query function for the node,which can query the sales volume of goods in any period.Second,radio frequency identification(RFID)technology provides a unique identification code for each goods,which is helpful for real-time quality monitoring of goods.In addition,the distributed stor-age and data immutability of blockchain play an important role in goods traceability.Third,we use efficient payment channels to solve the problem of fund default.· On the basis of the proposed supply chain framework via blockchain,a supply chain scheme SESCF based on smart contract is proposed.Aiming at the loopholes in the current smart contract code,the security of SESCF is analyzed and proved.In addition,SESCF is simulated on the simulation platform of Ethereum,which proves the feasibility of it.· This paper implements a secure and efficient supply chain system via blockchain-based smart contract,Sescf Dapp,which is built on the Consortium Blockchain.The system provides competitive bidding,query,inspect,trace and payment functions for nodes.Large scale experiments and detailed analysis have proved the feasibility and efficiency of Sescf Dapp.