Figure 3: Blockchain Frameworks To Support Transparency At Different
Points Of the Supply Chain28
Given the value proposition, different blockchain frameworks can provide
to the different parts of the supply chain, scalable applications will
also have to focus on interoperability issues. The different blockchain
frameworks have their own pros and cons and indeed these frameworks can
also be used together to achieve the desired traceability goals. In this
review, we will explore the pros and cons of the most relevant
blockchain solutions in supporting different aspects of agricultural
commodity supply chain sustainability.
Critical Examination of the Different Blockchain Frameworks
Used For Establishing Agricultural Traceability
Before delving deeper into examining specific blockchain frameworks, it
is important to acquaint ourselves with the different blockchain
paradigms. Broadly speaking, the Bitcoin and Ethereum blockchains are
examples of public blockchains. Anyone can join and participate in a
public blockchain. On the other hand, permissioned blockchains are a
compromise between public and private blockchains and enable stakeholder
participation, albeit with restrictions (such as needing identity
verification). The Hyperledger framework
that is commonly used in agricultural provenance applications is an example of permissioned blockchains.