PrivateBlockchain
Just a own, small, little private blockchain in Java to get behind the code and design of a blockchain.
Some UML-Diagrams are following.
This blockchain is designed to be something between the Bitcoin and Ethereum blockchain and takes the good pars of both worlds.
Comments in the code are following.
As some reference and guideline the german book "Blockchain für Entwickler" (ISBN: 978-3-8362-6390-0) was used.