Sphar-io / corda-training-solutions

Solutions for the two day Corda training

Corda Training Solutions

This repo contains all the solutions for the practical exercises of the Corda two day training course.

This repository is divided into two parts: Java solutions, and Kotlin solutions. You may complete the training in whichever language you prefer.

Setup

Tools

• JDK 1.8 latest version
• IntelliJ latest version (2017.1 or newer)
• git

After installing the required tools, clone or download a zip of this repository, and place it in your desired location.

IntelliJ setup

• From the main menu, click open (not import!) then navigate to where you placed this repository.
• Click File->Project Structure, and set the Project SDK to be the JDK you downloaded (by clicking new and nagivating to where the JDK was installed). Click Okay.
• Next, click import on the Import Gradle Project popup, leaving all options as they are.
• If you do not see the popup: Navigate back to Project Structure->Modules, clicking the + -> Import button, navigate to and select the repository folder, select Gradle from the next menu, and finally click Okay, again leaving all options as they are.

Running the tests

Now that you are all set-up, you can run the unit tests in either language. This project follows a test-based development style - the unit tests contain all the information you would need to complete this CorDapp. In this repository, the solutions have been provided for you. With the project open in IntelliJ

• Kotlin: Select Kotlin - Unit tests from the dropdown run configuration menu, and click the green play button.
• Java: Select Java - Unit tests from the dropdown run configuration menu, and click the green play button.

Solution files

Kotlin Solutions

State solution:

• kotlin-source/src/main/kotlin/net/corda/training/state/IOUState.kt

Contract solution:

• kotlin-source/src/main/kotlin/net/corda/training/contract/IOUContract.kotlin

Flow solutions:

• Issuekotlin-source/src/main/kotlin/net/corda/training/flow/IOUIssueFlow.kt
• Transfer kotlin-source/src/main/kotlin/net/corda/training/flow/IOUTransfer.kt
• Settle kotlin-source/src/main/kotlin/net/corda/training/flow/IOUSettleFlow.kt

The code in the following files was already added for you:

• kotlin-source/src/main/kotlin/net/corda/training/plugin/IOUPlugin.kt
• kotlin-source/src/test/kotlin/net/corda/training/Main.kt
• kotling-source/src/main/kotlin/net/corda/training/plugin/IOUPlugin.kt
• kotling-source/src/main/java/kotlin/corda/training/flow/SelfIssueCashFlow.kt

Java Solutions

State solution:

• java-source/src/main/java/net/corda/training/state/IOUState.java

Contract solution:

• java-source/src/main/java/net/corda/training/contract/IOUContract.java

Flow solutions:

• Issuejava-source/src/main/java/net/corda/training/flow/IOUIssueFlow.java
• Transfer Not implemented: java-source/src/main/java/net/corda/training/flow/IOUTransfer.java
• Settle Not implemented: java-source/src/main/java/net/corda/training/flow/IOUSettleFlow.java

The code in the following files was already added for you:

• java-source/src/main/java/net/corda/training/plugin/IOUPlugin.java
• java-source/src/test/java/net/corda/training/NodeDriver.java
• java-source/src/main/java/net/corda/training/plugin/IOUPlugin.java
• Not implemented: java-source/src/main/java/net/corda/training/flow/SelfIssueCashFlow.java

Running the CorDapp

To run the finished application, you have two choices for each language: from the terminal, and from IntelliJ.

###Kotlin

• Terminal: Navigate to the root project folder and run ./gradlew kotlin-source:deployNodes, followed by ./kotlin-source/build/node/runnodes
• IntelliJ: With the project open, select Kotlin - Node driver from the dropdown run configuration menu, and click the green play button.

###Java

• Terminal: Navigate to the root project folder and run ./gradlew java-source:deployNodes, followed by ./java-source/build/node/runnodes
• IntelliJ: With the project open, select Java - NodeDriver from the dropdown run configuration menu, and click the green play button.

###Interacting with the CorDapp Once all the three nodes have started up (look for Webserver started up in XXX sec in the terminal or IntelliJ ), you can interact with the app via a web browser.

• From a Node Driver configuration, look for Starting webserver on address localhost:100XX for the addresses.

• From the terminal: Node A: localhost:10009, Node B: localhost:10012, Node C: localhost:10015.

To access the front-end gui for each node, navigate to localhost:XXXX/web/iou/