关键词: 茶叶, 溯源, 监管, 区块链, 多链, 星际文件系统

Abstract: In order to protect the privacy of sensitive data of traceability companies, improve the storage performance of blockchain ledgers, and achieve safe and effective supervision of tea product quality, based on the group technology of the FISCO BCOS alliance chain, a blockchain multichain model for supervising tea traceability information was constructed, differentiated data uploading and query methods were proposed, and the inter planetary file system was used to store unstructured traceability data such as pictures and videos. In order to verify the feasibility of the model, a tea multichain traceability information supervision prototype system was developed, and the blockchain network testing tool Hyperledger Caliper and the interface testing tool Postman were used to test the blockchain network data writing query performance and application interface response performance respectively. The results show that the model divides the blockchain network into four chains such as planting and picking supervision, processing and packaging supervision, transportation and distribution supervision, and purchasing and sales supervision. The average writing operation throughput of the blockchain network built based on this model is 185 tps, and the average query operation throughput is 620 tps. The average data uploading latency of the prototype system is 1 365.00ms, the average query latency of consumers is 54.82ms, and the average query latency of regulatory agencies is 73.02ms.

Key words:  tea, traceability, supervision, blockchain, multi chain, inter planetary file system