Build a CPK

This section describes how to create CPKs. It contains the following:

• Configure your Project
• Sign Your Code
• Create the CPK File

Configure your Project

To configure your CPK project:

1. Add the CPK plugin to your project by adding the following to the start of the build.gradle file of your CorDapp Corda Distributed Application. A Java (or any JVM targeting language) application built using the Corda build toolchain and CorDapp API to solve some problem that is best solved in a decentralized manner. Gradle project:

   plugins {
       id 'net.corda.plugins.cordapp-cpk2'
   }
   

2. Apply the net.corda.cordapp.cordapp-configuration plugin to your root Gradle project, to configure the cordapp-cpk2 plugin for your version of Corda:

   plugins {
       id 'net.corda.cordapp.cordapp-configuration'
   }
   

   If your Gradle project only contains a single module, apply both plugins together:

   plugins {
       id 'net.corda.cordapp.cordapp-configuration'
       id 'net.corda.plugins.cordapp-cpk2'
    }
   

3. Declare both plugins’ versions in the settings.gradle file:

   pluginManagement {
       plugins {
           id 'net.corda.cordapp.cordapp-configuration' version cordaReleaseVersion
           id 'net.corda.plugins.cordapp-cpk2' version cpkPluginVersion
       }
   }
   

   cpkPluginVersion and cordaReleaseVersion are both Gradle properties. For example:

   cpkPluginVersion = '6.0.0'
   cordaReleaseVersion = '5.1.0'
   

Sign Your Code

To sign with a key other than the default key, add a cordapp/signing section to the project settings.gradle file.

Create the CPK File

1. Run the jar Gradle task:

   ./gradlew jar