isabella232 / cordapp-example-deterministic

An example CorDapp with deterministic states

Deterministic CorDapp Example

This CorDapp requires Corda v4.x or above. It contains 3 modules:

• contract: The Contract and State classes that Corda will use inside the enclave. These are compiled against the deterministic subset of the Corda and Java APIs.
• flow: The FlowLogic classes that Corda will execute outside of the enclave.
• web: An optional module that provides a RESTful API. This is solely for demonstrating the flows.

Configuring IntelliJ

Check out the project, and then execute this command:

$ gradlew installJdk

This will download and install the deterministic JDK artifacts into the ./jdk directory.

Run IntelliJ, and open the File/Project Structure/SDKs dialogue. Click + to add a new JDK SDK, selecting the project's new ./jdk directory as this JDK's home directory. Assign this new SDK a unique name, e.g. 1.8 (CorDapp).

Edit the project's top-level build.gradle file and assign this new SDK's name to the deterministic_idea_sdk property, e.g.

buildscript {
    ext {
        ...
        deterministic_idea_sdk = '1.8 (CorDapp)'
        ...
    }
}

Now open the CorDapp project within IntelliJ. Ensure that IntelliJ delegates all of this project's build actions to Gradle, that the Project JDK is a full JDK installation (not the deterministic one!) and that Gradle uses the Project JDK.

When IntelliJ imports this Gradle project, it should now be using 1.8 (Cordapp) as the Module SDK for both the contract_main and contract_test modules. This will allow IntelliJ to build the project correctly while using the deterministic Java subset for the IDE's presentation compiler.