关键词: 联盟链, 跨链, 监管, 智能合约

Abstract: The consortium chain has played a major role in the fields of logistics traceability and data transactions. However, the differences in the underlying implementation of the consortium chains make it hard to form an effective data sharing way between chains, cross-chain technology is an important method to solve the  “Isolated Data Island” problem of consortium chains. The existing cross-chain schemes cannot satisfy the needs of supervision for consortium chains, and there is no clear division of authority for cross-chain requests and inter-chain interoperability, cross-contract calls between chains may lead to malicious tampering of blockchain data during the cross-chain process, and thus they cannot be applied to cross-chain supervision scenarios. To solve the above problems, this paper proposes a cross-chain supervision mechanism based on the relay chain technology for on-chain computation in consortium-chains, which ensures the security of cross-chain operations by classifying the identity of the accessed chains, and uses modular design to achieve the scalability of cross-chain framework. Besides, this paper also proposes a communication message protocol that can ensure the security of the cross-chain supervision process. Finally, this paper analyzes and compares the proposed scheme with existing mechanisms, and validates the practicality of the proposed scheme through simulation experiments.

Key words: consortium blockchain, cross-chain, supervision, smart contract