Obtaining the CorDapp Template
When writing a new CorDapp, you’ll generally want to start from one of the following standard templates:
The CorDapp templates provide the boilerplate for developing a new CorDapp. CorDapps can be written in either Java or Kotlin. Sample code is provided in both languages throughout this tutorial.
Note that there’s no need to download and install Corda itself. The required libraries are automatically downloaded from an online Maven repository and cached locally.
Downloading the template
Open a terminal window in the directory where you want to download the CorDapp template, and run the following command:
git clone https://github.com/corda/cordapp-template-kotlin.git
git clone https://github.com/corda/cordapp-template-java.git
Once you have cloned the repository you wish to use, navigate to the correct subdirectory:
Opening the template in IntelliJ
Once you have successfully cloned the CorDapp template, open the
cordapp-template-java in IntelliJ IDEA. See the documentation on
Running a sample CorDapp if you are unsure of how to open a CorDapp in IntelliJ.
For this tutorial, you will only be modifying the following files:
// 1. The state contracts/src/main/kotlin/com/template/states/TemplateState.kt // 2. The flow workflows/src/main/kotlin/com/template/flows/Flows.kt
// 1. The state contracts/src/main/java/com/template/states/TemplateState.java // 2. The flow workflows/src/main/java/com/template/flows/Initiator.java
Progress so far
You now have a template that you can build upon to define your IOU CorDapp. Let’s start by defining the