End User Certificates

This CorDapp is built on top of the Kotlin template that is provided by Corda team.
You can find the full article about the purpose of this application here: https://blog.b9lab.com/small-arms-transfer-control-with-blockchain-r3s-corda-6e2fce9d80c4

Pre-Requisites

See https://docs.corda.net/getting-set-up.html.

Usage

Running tests inside IntelliJ

On the top right side of InelliJ select Unit Tests gradle task then click the start button.

Running the nodes

Below is a summary of the instructions to run the nodes from an Ubuntu terminal (for other operating systems; see https://docs.corda.net/tutorial-cordapp.html#running-the-example-cordapp):

1. Browse to the CordApp folder: cd cordapp-euc
2. Deploy the nodes: ./gradlew deployNodes
3. Run the nodes: ./build/nodes/runnodes
   Do not click or change focus until all five additional terminals have opened, or some nodes may fail to start; wait until they fully load before proceeding to the next section.

You can add more nodes by modifying the deployNodes task inside build.gradle file.

Interacting with the nodes

Shell

When started via the command line; each node will display an interactive shell:

1. Navigate to the Importer terminal and start the Issue EUC flow with the below command (to paste it in the terminal; click the mouse wheel button):
   flow start IssueFlow$Initiator importer: "O=Importer,L=Brussels,C=BE", exporter: "O=Exporter,L=Stockholm,C=SE", endUser: "O=End User,L=Brussels,C=BE", itemDesc: "AK-47", itemQty: 1000, totalValue: 100000.0
2. Navigate to the Exporter terminal and run the below command; you should see one new EUC state:
   run vaultQuery contractStateType: com.template.states.EUCState
3. Navigate to the MOD terminal and run the below command; you should see zero states, because by design MOD is only an observer that verifies and signs the transaction:
   run vaultQuery contractStateType: com.template.states.EUCState
4. Navigate to the Exporter terminal and start the Issue EUC flow with the below command (to paste it in the terminal; click the mouse wheel button):
   flow start IssueFlow$Initiator importer: "O=Importer,L=Brussels,C=BE", exporter: "O=Exporter,L=Stockholm,C=SE", endUser: "O=End User,L=Brussels,C=BE", itemDesc: "AK-47", itemQty: 1000, totalValue: 100000.0
   You should get an error: Only the importer can initiate the flow.
5. Type bye to shutdown a certain terminal.