chain3j
· chain3j is a lightweight, highly modular, reactive, type safe Java and Android library for working with Smart Contracts and integrating with clients (nodes) on the MOAC network.
Download JD-GUI to open JAR file and explore Java source code file (.class .java)
Click menu "File → Open File..." or just drag-and-drop the JAR file in the JD-GUI window chain3j-0.1.0.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.