Blockchain Tethered AI

Chapter 6. Instantiating Your Blockchain

Now that you have a copy of your model and its artifacts in a bucket, you are ready to implement the blockchain that you will use to tether it. You will use Hyperledger Fabric as your blockchain system, which Chapter 2 explained in detail.

In the next section, you will instantiate a Hyperledger Fabric blockchain instance, test it, and implement chaincode. You will set up a single node that will be used, through the BTA interface, by each of your users as a tamper-evident record of their AI experiments.

Finally, you will set up an OCI connector so your blockchain can reach your bucket.

Exercise: Setting Up Hyperledger Fabric

Setting up the blockchain network is the next step. When you run the scripts for this exercise, you will create a node for each participant, simulated in Docker, which consists of a blockchain connector, a certificate authority, a network peer, and chaincode, as shown in Figure 6-1. You will also create channels, which allow the nodes to communicate with one another and play an important role in choosing which peers receive which data.

The blockchain connector is a Node.js script that is installed in each peer, which exchanges data between a web application and the peers. In Figure 6-2, the demo BTA network is shown with all of its participants, revealing how the peers interact using the channels. The o5-ai-engineer-channel is a personal channel of an AI engineer that stores the draft model. Another channel, c1-channel ...