Policy-Based Validation of Bitcoin Transactions on Cryptographic Smartcards using JavaCard Template project with Gradle

Showcases

./gradlew run 

Runs a showcase. I recommend to look into the code base for better understanding.

How to use

• Clone this template repository:

git clone --recursive https://github.com/ph4r05/javacard-gradle-template.git

• Run Gradle wrapper ./gradlew on Unix-like system or ./gradlew.bat on Windows to build the project for the first time (Gradle will be downloaded if not installed).

Building cap

• Run the buildJavaCard task:

./gradlew buildJavaCard  --info --rerun-tasks

Generates a cap file ./applet/out/cap/PSBTPolicyValidator.cap

Note: --rerun-tasks is to force re-run the task even though the cached input/output seems to be up to date.

Installation on a (physical) card

./gradlew installJavaCard

Or inspect already installed applets:

./gradlew listJavaCard

Running tests

./gradlew test --info --rerun-tasks

Dependencies

This project uses mainly:

• https://github.com/bertrandmartel/javacard-gradle-plugin
• https://github.com/martinpaljak/ant-javacard
• https://github.com/martinpaljak/oracle_javacard_sdks
• https://github.com/licel/jcardsim
• Petr Svenda scripts

Kudos for a great work!