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.