The paycoinj library is a Java implementation of the Paycoin protocol, which allows it to maintain a wallet and send/receive transactions without needing a local copy of Paycoin Core. It comes with full documentation and some example apps showing how to use it. paycoinj uses a central server to download block hashes for verification.

• Java 6+
• Maven 3+ - for building the project
• Orchid - for secure communications over TOR
• Google Protocol Buffers - for use with serialization and hardware communications
• PaycoinAbeExplorer - server code which provides block hashes and acts as block explorer

To get started, it is best to have the latest JDK and Maven installed. The HEAD of the master branch contains the latest development code and various production releases are provided on feature branches.

To perform a full build use

mvn clean package -Dmaven.test.skip=true

You can also run

mvn site:site

to generate a website with useful information like JavaDocs.

The outputs are under the target directory.

Alternatively, just import the project using your IDE. IntelliJ has Maven integration built-in and has a free Community Edition. Simply use File | Import Project and locate the pom.xml in the root of the cloned project source tree. Be sure to add "Skip Tests" to Build/Clean and Build parameters.

These are found in the examples module.

This will download the block chain and eventually print a Paycoin address that it has generated.

If you send coins to that address, it will forward them on to the address you specified.

  cd examples
  mvn exec:java -Dexec.mainClass=io.xpydev.paycoinj.examples.ForwardingService -Dexec.args="<insert a paycoin address here>"

Note that this example app does not use checkpointing, so the initial chain sync will be pretty slow. You can make an app that starts up and does the initial sync much faster by including a checkpoints file; see the documentation for more info on this technique.