Now we will turn our attention to the middleware. In Chapter 5, Exposing Network Assets and Transactions, when we created tradechannel, the blockchain was initialized with the genesis block created using the configtxgen tool. The genesis block happens to be the first configuration block of a channel. Subsequent channel configuration changes involve appending new configuration blocks to the channel, each uniquely versioned, and the latest overriding the previous ones. In the upgrade scenario, it's the configuration in the genesis block that will be overridden, as we assume that no other changes have been made since our channel was created and made ready for use in Chapter 5, Exposing Network Assets and Transactions ...
Updating the channel configuration
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