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Welcome to groestlcoinj

The groestlcoinj library is a Java implementation of the Groestlcoin protocol, which allows it to maintain a wallet and send/receive transactions without needing a local copy of Groestlcoin Core. It comes with full documentation and some example apps showing how to use it.

Technologies

  • Java 8+ (needs Java 8 API or Android 6.0 API, compiles to Java 8 bytecode) and Gradle 4.4+ for the core module

  • Java 8+ and Gradle 4.4+ for tools and examples

  • Java 11+ and Gradle 4.10+ for the JavaFX-based wallettemplate

  • [Gradle](https://gradle.org/) - for building the project

  • [Google Protocol Buffers](https://github.com/google/protobuf) - for use with serialization and hardware communications

Getting started

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 build directory.

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](http://www.jetbrains.com/idea/download/) 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.

Building and Using the Wallet Tool

The groestlcoinj tools subproject includes a command-line Wallet Tool (wallet-tool) that can be used to create and manage groestlcoinj-based wallets (both the HD keychain and SPV blockchain state.) Using wallet-tool on Groestlcoin’s test net is a great way to learn about Groestlcoin and groestlcoinj.

To build an executable shell script that runs the command-line Wallet Tool, use:

gradle groestlcoinj-tools:installDist

You can now run the wallet-tool without parameters to get help on its operation:

./tools/build/install/wallet-tool/bin/wallet-tool

To create a test net wallet file in ~/groestlcoinj/groestlcoinj-test.wallet, you would use:

mkdir ~/groestlcoinj
./tools/build/install/wallet-tool/bin/wallet-tool --net=TEST --wallet=$HOME/groestlcoinj/groestlcoinj-test.wallet create

To sync the newly created wallet in ~/groestlcoinj/groestlcoinj-test.wallet with the test net, you would use:

./tools/build/install/wallet-tool/bin/wallet-tool --net=TEST --wallet=$HOME/groestlcoinj/groestlcoinj-test.wallet sync

To dump the state of the wallet in ~/groestlcoinj/groestlcoinj-test.wallet with the test net, you would use:

./tools/build/install/wallet-tool/bin/wallet-tool --net=TEST --wallet=$HOME/groestlcoinj/groestlcoinj-test.wallet dump

Note: These instructions are for macOS/Linux, for Windows use the tools/build/install/wallet-tool/bin/wallet-tool.bat batch file with the equivalent Windows command-line commands and options.

Example applications

These are found in the examples module.

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