To create the backend server for Bank B, duplicate the backend server code for Bank A, and change the following details:

1.  The ipfs object to the client port for Bank B, as follows:

const ipfs = ipfsClient('http://localhost:5002')

2. postgres client values to the following code:

const conString = "postgres://bankb:bankb@localhost:5432/bankb";

3. The server port to the following, to avoid conflict:

var server = app.listen(process.env.PORT || 8001, function () {
 var port = server.address().port;
 console.log("App now running on port", port);
 });

4.  The ccpPath object to the connection profile for bankb, as follows:

const ccpPath = '~/fabric-samples/bankchain/connection-bankb.json';

5. The wallet path for BankB, as follows:

const wallet = new FileSystemWallet('~/fabric-samples/bankchain/wallet-BankB');

6. Bring both the servers online by running the following commands on separate Terminals:

$node backend-BankA.js
$node backend-BankB.js

You should now have the backend servers online at the 8000 and 8001 ports, for Bank A and Bank B respectively.