Introduction In training classes, I always hear people say that Hyperledger Fabric is really complicated. And among everything, it is always the infrastructure part, that is, bringing up the fabric network with all the components, say the Peers, Orderers, Certificate Authority, with proper setup on the organizations and channels. After that…

Introduction Hyperledger Fabric has added support of chaincode deployment and execution outside of Fabric with v2.0. It helps the administrators to manage the chaincode runtime independently of the peer. This feature really helps in the deployment of chaincode on Fabric in deployments such as Kubernetes. This feature becomes really important…

In the previous article we’ve configured Hyperledger fabric’s Operations Service. Now it’s time to visualize our data to provide a better understanding. Let’s take a look at how to configure byfn to be able to monitor metrics with Prometheus. Download the latest version of Prometheus and extract it to a…

In my opinion, tutorial is quite a tricky thing to do because it somehow would make you become lazy and unchallenged — since you could just look up how other people successfully did something and you only need to follow all the instructions, then voila! You did it. But on…

So far we talked about: What is Hyperledger Fabric and how it works Hyperledger Fabric Network Up and Running How to write chaincode and invoke chaincode functions In this article we will talk about different types of channel-based events and event listeners, when to use them and particularly we will…

Hyperledger Fabric is a permissioned blockchain implementation and one of the Hyperledger projects hosted by The Linux Foundation. Over the past year, many organizations are adopting it for distributed ledger needs in their use cases. Why Kubernetes for Hyperledger Fabric? This is a question that usually comes up in our minds while thinking about the…

Background The Hyperledger Summer Mentorship Program, now in it’s 4th iteration, presents an exciting opportunity to gain exposure to Hyperledger open source development and contribute to the open source blockchain ecosystem. This year, a cohort of 18 mentees worked on a diverse array of projects. I got to work as a…

CouchDB — Rich Query Support — When working with Hyperledger Fabric (HLF) for any blockchain use case, Performance is of utmost importance. You must have also wondered how to query huge record sets stored on the ledger in a couple of seconds or tried to implement methods to retrieve data on need basis. One way to…

In this article, I’ll explain the importance of CouchDB as a State Database in Hyperledger Fabric. Introduction Hyperledger Fabric uses state databases to store the ledger records in the World State. The State Database includes LevelDB and CouchDB to be flexible for the developer to verify the records. LevelDB stores the…

Hyperledger Fabric (HLF) uses a key value database to store its state. This object store holds binary data which can be queried using its key. By default fabric uses a LevelDB store which is included in the peer process. When using simple structs in your chaincode, you most likely just…

Learn how to implement Access Control in Hyperledger Fabric project and update it dynamically. This is an extensive guide for Hyperledger Fabric ACLs at the config level. Hyperledger Fabric is currently the most popular permissioned blockchain framework in the business world. This tutorial is divided into two parts. Understanding and…

This is the second part of the article. In previous part we have examined the First Network from Hyperledger Fabric tutorials, through the script byfn.sh. In this part we repeat the same steps using the command line instead of this script. …

Hyperledger Fabric is a business Blockchain project hosted by Linux Foundation. It is a “platform for distributed ledger solutions, underpinned by a modular architecture delivering high degrees of confidentiality, resiliency, flexibility and scalability. …

Introduction This will be the first of a series of tutorials that show how to create a Hyperledger Fabric network from scratch, with several actors and getting to create a Rest API to interact with it. Requirements To be able to start with this tutorial, it is necessary to have the dependencies…