Design And Implementation Of International Trading Remitting System Based On Blockchain Cross-chain Technology

Blockchain cross-chain technology allows value crossing the barriers between blockchains,so that the value originally stored on a specific blockchain can be converted to another one,thereby achieving the circulation of value.,which is one of the main research direction in blockchain field.The international trade remittances involves at least two participating countries and multiple parties.The process requires the transfer of information between multiple parties.Problems such as long time,multiple processes,opaque information,isolated data islands,and data privacy become the bottleneck of development.Since the blockchain cross-chain technology has good technical advantages in privacy protection,access control,traceability and etc.,it can be applied to the international trade remittance system to meet current business needs,which is significant for the development of international trade remittance.Therefore,this article combines the current key needs in the process of international trade remittances,gives full play to the advantages of blockchain cross-chain technology,and studies the data migration mechanism between heterogeneous blockchains,develops and realizes an international trade remittance prototype system based on blockchain crosschain technology.First of all,in view of the existence of isolated islands of information between heterogeneous blockchains,the rapid circulation of value between the blockchain systems,the inability of ecological docking and system grows,this article focuses on the research and analysis of the blockchain architecture,propose heterogeneous blockchain data migration mechanism based on oracle,and studies the data migration mechanism for cross-chain interoperability.The article focuses on the design of interaction rules,message transfer and data migration mechanisms between heterogeneous blockchains.The on-chain part define the cross-chain data interaction format through the oracle system contract.The business contract only needs to call the functions defined in the oracle system contract to send cross-chain requests;the off-chain part defines the data interaction format and data interaction process between the monitoring nodes and the follower nodes.Through distributed off-chain storage to realize the efficient storage and transmission of cross-chain requests,which can assure the interconnection and intercommunication between blockchains.Secondly,on the basis of the heterogeneous blockchain data migration mechanism based on the oracle,and combines with the characteristics of the international trade remittance system,this paper designs and implements an international trade remittance prototype system based on the blockchain cross-chain technology.This article starts with demand and system functions analysis,and then introduces the overall architecture,functional modules and logic design of the system.This system provides functions such as login and registration,bilateral trade data settlement,issuance and viewing of transaction vouchers,data sharing and user permissions control.It also provides a brief introduction to the implementation of the system through the display of the system pages.Combining the proposed oracle-based heterogeneous blockchain data migration mechanism and the nature of the blockchain technology,the security in the transaction process are guaranteed.To sum up,this paper proposes a heterogeneous blockchain data migration mechanism based on oracle,and applied the data migration mechanism into the system,design and implement an international trade remittance system based on blockchain cross-chain technology.