Our thoughts

… referring to digitalisation, cloud computing, blockchain technologies - or whatever we want to share.

Hyperledger Fabric (HLF) / DAML - an introduction

In this meetup we are going to have Anthony Lusardi as a guest speaker. He will give us an introduction to Daml, a programming language and techstack for distributed ledgers along with a live demonstration of Daml’s unique ability to be written once and deployed anywhere including Hyperledger Fabric 2.2 and Sawtooth. Support - Material view slides / download The recording is published on the Hyperledger Youtube Channel.

Hyperledger Fabric v2 Chaincode Development Network, a comparison

In this article I would like to introduce two possible ways to run a fabric test network for chaincode development. If you want to develop a chaincode for a certain business case, you need a way to quickly test your chaincode without the complexity of a running fabric network. You can read the full article on samlinux.medium.com With the samlinux newsletter service automatically up-to-date. You want to learn more about Hyperledger Fabric?

20 Years samlinux

A turbulent year is coming to its end. The corona pandemic has all of us firmly under control. At the same time, a very pleasant event for us almost went under, namely our 20th company anniversary. Yes, samlinux’s history goes back 20 years. It is time to take a look back and a closer look at our exciting journey from the beginnings of the internet to today’s cloud computing. We have always been a company that has stayed in the background.

Hyperledger Fabric (HLF) / The Road to a Network

In this article we learn how to create a Hyperledger Fabric 2.2 network from scratch by ourselves. The aim is to install a persistent network with three peer organisations and a solo RAFT Orderer. Afterwards, we install a Chaincode (ABstore) and test it with CLI Tools. Support - Material view slides With the samlinux newsletter service automatically up-to-date. You want to learn more about Hyperledger Fabric?

Hyperledger Fabric (HLF) / All about Channels

This article gives insight into the basic functionality of a Fabric network, namely those of the channels. We get to know the importance of the channels and to understand the differences between system and application channel. In this meetup we adapt step by step the existing test-network with two application channels. Furthermore, we install a chaincode per channel and test it with the CLI. We get to know the needed tools like configtxgen or configtxlator and decode a *.

Hyperledger Fabric (HLF) Chaincode / Internal vs External Chaincode (CC)

This contribution shows the different usage of a chaincode implementation. The article builds on the previous one of 23rd of October 2020 and demonstrates how an external CC Service can be used in comparison with an internal implied chaincode container. Furthermore, we dive deeper into the test-network as we look closer at the attached scripts to change between the organizations. We also learn how the docker-compose.yaml file is built-up. This contribution also gives a short insight into the so-called buildpacks.

Hyperledger Fabric (HLF) Chaincode / Smart Contract in Fabric 2.2.x

This article delivers insights into the world of HLF 2.2.x. The talk starts with the concept of the smart contract and shows how it is linked to Fabric. Furthermore, the “chaincode lifecycle” process is shown which is newly introduced in Fabric Version 2. Finally, the differences to version 1 are presented. With an hands-on example the existing chaincode ABstore is installed in a test-network of fabric-samples. The upgrade process is also addressed as well as how to change the chaincode afterwards.

Understanding Fabric 2.2.x - Episode no 01

Introduction In the blockchain world there are basically two types of blockchain - the public and the private blockchain. Hyperledger Fabric (HLF) can be assigned to the private blockchain world. In this article I would like to explain how you get started with this technology. In a permissionless (public) blockchain, on the one hand, virtually anyone can participate and every participant is anonymous. On the other hand, permissioned (private) blockchains operate amongst a set of known, identified and often verified participants who act under a governance model that yields a certain degree of trust.

Hyperledger Fabric (HLF) - A First Taste of HLF 2.2.x

This contribution gives you a first taste of the world of HLF 2.2.x. It shows how you can install an own development system on a Virtual Private Server (VPS - DigitalOcean Droplet). Furthermore, you get an overview of the provided test-network which is integrated in the fabric-samples. The samlinux newsletter service keeps you up-to-date automatically. Suitable to this contribution you could be interested in the following article: A First Taste of HLF 2.

Hyperledger Fabric (HLF) - Enable TLS

The slides provide an overview of how you can enable TLS on a fabric network. Download the slides Watch the presentation

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