Welcome to qtumj
QtumJ is bitcoinj ported to the Qtum blockchain protocol. The bitcoinj library is a Java implementation of the Bitcoin protocol, which allows it to maintain a wallet and send/receive transactions without needing a local copy of Bitcoin Core. It comes with full documentation and some example apps showing how to use it.
- Java 7+ and Gradle 4.4+ for the
- Java 8+ and Gradle 4.4+ for
- Java 11+ and Gradle 4.10+ for the JavaFX-based
- Gradle - for building the project
- Google Protocol Buffers - for use with serialization and hardware communications
Currently the library is not stable yet! Use with caution!
- Wallet and address managing
- Qtum transactions creation
- Node syncing (partially implemented)
- Block generating
- Blockchain managing
To get started, it is best to have the latest JDK and Gradle installed. The HEAD of the
master branch contains the latest development code and various production releases are provided on feature branches.
Building from the command line
Official builds are currently using with JDK 8, even though the
core module is compatible with JDK 7 and later.
To perform a full build (including JavaDocs and unit/integration tests) use JDK 8+
gradle clean build
If you are running JDK 11 or later and Gradle 4.10 or later, the build will automatically include the JavaFX-based
wallettemplate module. The outputs are under the
To perform a full build without unit/integration tests use:
gradle clean assemble
Building from an IDE
Alternatively, just import the project using your IDE. IntelliJ has Gradle integration built-in and has a free Community Edition. Simply use
File | New | Project from Existing Sources and locate the
build.gradle in the root of the cloned project source tree.
These are found in the
Now you are ready to follow the tutorial from bitcoinj. QtumJ is quite similar to that.
Testing a SNAPSHOT build
Building apps with official releases of bitcoinj is covered in the tutorial.
If you want to develop or test your app with a Jitpack-powered build of the latest
release-0.15 branch of bitcoinj follow the dynamically-generated instructions for that branch by following the correct link.