Abstract:

In view of the problems existing in the current public charity industry, such as opaque, untraceable and easy to tamper with donation information, a public charity donation traceability system model based on consortium blockchain was constructed.In the process of consensus, an improved PBFT consensus algorithm——DG-PBFT algorithm was applied, which improved the original random election of the master node to the points system election, and optimally transformd the original three-stage consensus into two-stage consensus.The system was developed on Hyperledger Fabric platform, and the Go language was used for chain code development.Four organizations corresponding to donors, recipients, charities and regulatory departments were configured.Smart contracts were designed according to functional requirements, which not only realized the traceability of donation information, but also could appeal and supervise through the traceability system.The experiment results showed that the traceability system could not only ensure the degree of decentralization, but also enhance the reliability of data, ensure the security of data, reduce the communication cost and improve the efficiency of traceability.

Key words: blockchain, hyperledger fabric, donation tracing, intelligent contract, decentralization