Using the Node Explorer to test a Corda Enterprise node on Corda Testnet

This document will explain how to test the installation of a Corda Enterprise node on Corda Testnet.

Prerequisites

This guide assumes you have deployed a Corda Enterprise node to either Azure or AWS using one of:

It also assumes your node is provisioned and connected to the Corda Testnet although the instructions below should work for any Corda Enterprise node connected to any Corda network.

Note

If you need to set up a Corda Enterprise node using the Cloud templates, see: Using Azure Resource Manager Templates to deploy a Corda Enterprise node.

Get the testing tools

To run the tests and make sure your node is connecting correctly to the network you will need to download and install a couple of resources.

  1. Log into your Cloud VM via SSH.

  2. Stop the Corda node(s) running on your cloud instance.

    sudo systemctl stop corda
    

    Warning

    If this is an HA node, make sure to stop both the hot and cold nodes before proceeding. Any database migration should be performed whilst both nodes are offline.

  3. Download the Resources:

    Download the finance CorDapp and database manager to your VM instance:

    wget http://downloads.corda.net/cordapps/net/corda/finance/ENT-3.2/corda-finance-3.2.jar \
         http://downloads.corda.net/cordapps/net/corda/finance/ENT-3.2/corda-finance-3.2-sources.jar \
         http://downloads.corda.net/tools/database-manager/corda-tools-database-manager-3.2.jar
    

    Copy the downloads from /home/<USER>/ to /opt/corda/cordapps/.

    This is required to run some flows to check your connections, and to issue/transfer cash to counterparties.

    sudo cp /home/<USER>/corda-finance-*.jar /opt/corda/cordapps/
    
  4. Create a symbolic link to the shared database driver folder

    sudo ln -s /opt/corda/drivers /opt/corda/plugins
    
  5. Execute the database migration. This is required so that the node database has the right schema for finance transactions defined in the installed CorDapp.

    cd /opt/corda
    sudo java -jar /home/<USER>/corda-tools-database-manager-3.0.jar --base-directory /opt/corda --execute-migration
    
  6. Add the following line to the bottom of your node.conf:

    custom : { issuableCurrencies : [ USD ] }
    

    Note

    Make sure that the config file is in the correct format, e.g., by ensuring that there’s a comma at the end of the line prior to the added config.

  7. Restart the Corda node:

    sudo systemctl start corda
    

    Your node is now running the Finance Cordapp.

    Note

    You can double-check that the CorDapp is loaded in the log file /opt/corda/logs/node-<VM-NAME>.log. This file will list installed apps at startup. Search for Loaded CorDapps in the logs.

  8. Now download the Node Explorer to your LOCAL machine:

    wget http://downloads.corda.net/tools/explorer/ENT-3.2/corda-tools-explorer-3.2.jar
    

    Warning

    The Enterprise Node Explorer is incompatible with open source versions of Corda and vice versa as they currently use different serialisation schemes (Kryo vs AMQP).

  9. Run the Node Explorer tool on your LOCAL machine.

    java -jar corda-tools-explorer-3.2.jar
    
    _images/explorer-login.png

Connect to the node

To connect to the node you will need:

  • The IP address of your node (the public IP of your cloud instance). You can find this in the instance page of your cloud console.
  • The port number of the RPC interface to the node, specified in /opt/corda/node.conf in the rpcSettings section, (by default this is 10003 on Testnet).
  • The username and password of the RPC interface of the node, also in the node.conf in the rpcUsers section, (by default the username is cordazoneservice on Testnet).

Click on Connect to log into the node.

Check your network identity and counterparties

Once Explorer has logged in to your node over RPC click on the Network tab in the side navigation of the Explorer UI:

_images/explorer-network.png

If your Enterprise node is correctly configured and connected to the Testnet then you should be able to see the identities of your node, the Testnet notary and the network map listing all the counterparties currently on the network.

Test issuance transaction

Now we are going to try and issue some cash to a ‘bank’. Click on the Cash tab.

_images/explorer-cash-issue1.png

Now click on New Transaction and create an issuance to a known counterparty on the network by filling in the form:

_images/explorer-cash-issue2.png

Click Execute and the transaction will start.

_images/explorer-cash-issue3.png

Click on the red X to close the notification window and click on Transactions tab to see the transaction in progress, or wait for a success message to be displayed:

_images/explorer-transactions.png

Congratulations! You have now successfully installed a CorDapp and executed a transaction on the Corda Testnet.