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Blockchain [clear filter]
Saturday, January 26
 

9:00am CET

Can’t we just agree?
If you don’t want to be lost in the amount of emerging blockchain technologies, one of the things you have to understand is consensus algorithms used by them.

Consensus algorithm is one of the main differentiators among blockchain technologies and understanding how blockchain consensus is reached is crucial for every developer who wants to work on given technology. A short taxonomy of consensus algorithms used in various blockchain technologies will be given. We will start with the well known proof-of-work used in Bitcoin and show you how it differs from not-Byzantine fault tolerant consensus algorithms like Raft. You will understand why that could be a better choice for some of the blockchain technologies. We will conclude with emerging technologies, like Tendermint or Swirlds.

Speakers
avatar for Ondřej Chaloupka

Ondřej Chaloupka

Developer, Red Hat
I'm a developer at WildFly team, working on project Narayana - transaction manager integrated with WildFly, Quarkus and other Red Hat projects.
avatar for Vojtech Juranek

Vojtech Juranek

Developer, Red Hat
Works at Red Hat on storage part of oVirt project and is a contributor to various open source projects.



Saturday January 26, 2019 9:00am - 9:50am CET
D0207

10:00am CET

Blockchain and Smart contracts
After a brief introduction on what is blockchain technology and how it works under the wood, focusing on Ethereum the next generation blockchain implementation.
We will focus on the concept of smart contract introducing it through a simple case study and its standard implementation in ethereum.
We will code it using Solidity language deploying and testing it in a live demo on Ethereum test network.

Speakers
avatar for Stefano Maestri

Stefano Maestri

Manager, Software Engineering, RedHat



Saturday January 26, 2019 10:00am - 10:50am CET
D0207

11:00am CET

Blockchain magic from the browser with web3
Blockchain is the latest buzzword. Who would’ve thought that this technology brought by bitcoin would serve so many use cases today, including buying and trading cute kittens ? Consensus, trustlessness and immutability can now be applied to any concept thanks to Ethereum.. but how can you interact with these such-called DApps (decentralised apps) ? That's where web3.js come to the rescue, let's discover this powerful library !
No specific knowledge required, although good knowledge of JS (ES6/ES7) will help for the demo part.

Speakers
avatar for Alexandre Gomes

Alexandre Gomes

Front-end engineer, Showmax
Front-end developer from Paris, located in Prague. When I'm not busy building beautiful and efficient UI for Showmax. the leading SVOD service in South Africa, I like to geek out about blockchain. That will be the topic of my talk !



Saturday January 26, 2019 11:00am - 11:25am CET
D0207