Design And Implementation Of Goods Transaction System Based On Blockchain

With the development of Internet technology and the emergence of various terminal devices,people's access to information and life style have changed dramatically.The emergence of classified information platform and e-commerce platform has brought great opportunities for business development,accompanied by risks.All kinds of false information abound in our life.Users cannot distinguish the authenticity of information,which brings negative impact to society and economic loss to people.The transaction platform guarantees the transaction by providing users with third-party payment,insurance,comments and other functions to provide trust.However,when using these functions,personal information may be leaked and may encounter false information and transactions.Therefore,how to ensure the authenticity and reliability of information,making it difficult to tamper with,traceability is the focus of this thesis.Therefore,how to ensure the authenticity and reliability of information,making it difficult to tamper with,traceability is the focus of this thesis.In the above context,this thesis combines blockchain technology and trust mechanism to propose a blockchain-based trust mechanism and storage optimization scheme.This thesis mainly includes the following two parts:(1)The trust mechanism of goods trading based on blockchain.While ensuring the authenticity and reliability of the transaction,blockchain can get a more fair evaluation through the automatic and decentralized operation of the trust mechanism in the smart contract.Four types of smart contracts are designed for the trust mechanism,which trigger conditionally in each stage of evaluation.(2)Storage optimization model based on blockchain.Blockchain-based storage optimization model.When the blockchain is used in the transaction of goods,the storage space of the blockchain is found to be small.Through the combination of the blockchain and IPFS,a storage optimization model based on the blockchain is designed.This model ensures the security of data transmission by dividing nodes into different roles and the authentication mechanism of data transmission between roles.At the same time,the backup strategy is designed to make the model have a certain performance of data disaster recovery and protection.Finally,the security of the model is explained.The goods trading platform based on blockchain is designed.The overall architecture and process of the system are described.The overall architecture and process of the system are described.Record the transaction process through the blockchain to ensure the safety and reliability of the information,and adopt a certain incentive mechanism for the roles in the system to ensure the stability of the system.The smart contract records the content of the information release,the intermediate process,and records the parties involved in the information reply.The implementation of each module and smart contract in the system is carried out.The IPFS network and the Ethereum private network were built and the environment was tested,and a blockchain-based goods transaction information system was implemented.The key functional modules and performance of the system were tested.