Agri Food Supply Chain Using Ethereum Smart Contract -- 2

The agricultural food supply chain completes the entire production and transportation process ‘‘from farm to fork’’, involving many participating entities, and forming long and complex characteristics that make tracking the entire process very cumbersome. Therefore, for traceability purposes, werecordtheinformationandaddtheuniqueidentityandlot number of the food to each subsequent transaction when the transaction is initiated, and record the hash value to ensure the authenticity of the transaction. A batch is a group of foods in a warehouse whose batch number is the unique identifier.ToaddresstheblockchaindataexplosionandIPFS limitations, the hash of the data is stored in the hyperledger, and the transaction data is stored in the IPFS. Access control policy is adopted to restrict blockchain reads and writes, ensuring that transactions are executed by authorized users and enhancing data security. Similarly, smart contracts allow only specific entities to execute. Entities are registered in the system and interact through the smart contracts. The processing of the entity in the agricultural food supply chain is shown in Fig. 3, and the description of each entity is as follows:
1) Farmer
2)Processor
3)Distributor
4)Retailer
5)Customer