A Solution for the Risk of Non-deterministic Transactions in Hyperledger Fabric

Abstract

Blockchain is one of the most popular distributed ledger technologies. In order to solve the trustless problems between enterprises, many permissioned blockchain platforms are proposed in recent years. Hyperledger Fabric is a permissioned blockchain which is comprised of chaincode, endorsing peers, ordering service, committing peers and membership service. Fabric provides identity authentication, transactions encryption and high performance. Hence, decentralized application based on Fabric can be applied among enterprises to implement the immutable and high throughput for transactions. However, some limitations still exist in Fabric framework. This paper surveys the risk of non-deterministic transactions in Fabric, which can be caused by read-write conflict and transactions order dependency. Transactions are judged to be invalid by committing peers when read-write conflict exists. Besides, transactions submission order may be disrupted during endorsing and ordering. Both of the two risks can make the final transaction execution result non-deterministic. Finally, a solution of cache layer on Fabric client is proposed to solve the risk of non-deterministic transactions.