Hands-on introduction to blockchain technologies.
First, basic concepts as peer-to-peer networks, mining and distributed consens are introduced basd on the Bitcoin protocol. Next smart contracts are discussed for the Ethereum protocol and demonstrated using a local/private blockchain.
The session concludes with a live demo of the interaction of a Java based classical business application with a smart contract running in the Ethereum network.
The goal of the session is to provide a meaningful background of blockchain technologies in genral and to enable developers to start exploring Ethereum and smart contracts within a few hours.
The proposed development setup is oriented towards Java developers and contains Docker images for the Geth and TestRPC Ethereum clients that can be run locally. To access Ethereum from Java the web3j Java library is used. The business application that integrates with the smart contracts is built with the Eclipse Scout framework.
Slides have been created by @ZimMatthias for the JUG Switzerland session on May 22, 2017 https://www.jug.ch/html/events/2017/blockchain_ethereum.html