Parity recently announced the release of Rococo V1, a “Parachain Testnet” for projects and developers to test their Parachains and see how well they can interoperate between each others. Although this release focuses on parachains there is another alternative to these that can sometimes be more interesting: parathreads. These are my thoughts on their differences and which option is best for which project.

Disclaimer: We have the advantage of being in a highly dynamic ecosystem and the content of this article may become outdated over time. …


We are all familiar with today’s main governance systems which could be registering to be able to vote (as an identity), choosing a leader whether it is for running a country or a company, or recommending a potential business solution for the best interest of the project. Sadly, they all come with their issues which we are all too familiar with. Even when dealing with more recent tools such as decentralized organizations, blockchain voting or governance tokens, there are main friction points preventing an efficient governance process to exist. …


Early morning CEST on Monday, October 19, 2020, we detected an issue on Nodle’s main network. It appeared that all our validators were offline and block production had stopped. This seemed to be due to a generalized issue on our infrastructure located on Google Cloud. After restarting the validators, block production was still not moving, and we encountered consensus errors. This story covers what happened and how we solved it.

Just like a Phoenix, our chain had to come back from its own ashes 🔥

First, There is a Consensus

A typical production chain built with Parity Technologies’s Substrate Framework produces and finalizes blocks by combining two consensus algorithms: babe and grandpa. Babe produces blocks that grandpa finalizes. …


Photo by Christina @ wocintechchat.com on Unsplash

The NodeOps and DevOps challenge

Infrastructure management is hard. But blockchain infrastructure is harder. Much, much harder. With blockchain infra, you have to ensure that your nodes are highly available and that their keys are kept safe and secure. The current go-to tools to achieve that are Terraform and Kubernetes (+ Helm). These tools are famously difficult to use and you often need an expert (a DevOps engineer) to use them correctly. DevOps talents are not easy to find and are expensive to hire (~$100k/year). Even if money is not an issue for you, implementation of a highly availabiliable setup will cost you time. This…


Written in conjunction with the Governance Research Institute.

In a previous Blockchain Tales article, we shared a preliminary governance model. As we executed the Nodle Chain Mainnet and continue to map out our operations, technology and other resources to match our goals noted in Nodle’s White Paper, we decided to make changes to our governance model.

The image below shows a summary of governance on the Nodle Chain.

Because a picture is worth a thousand words: our upgrade governance model

Root Committee: Controlled by the executive team at Nodle

Technical Committee: Controlled by the engineering team at Nodle (and members of the executive team)

Finance Committee: Controlled by members of the finance…


Photo by Ben Sweet on Unsplash

Ask two different people in the decentralization ecosystem and they will both bring different definitions of what decentralized identity is. Some will think it’s related to creating some sort of “ID Card” with one’s social profile, while others will think of giving cryptographic key-pairs to every human on earth and beyond. At Nodle, we like to think that a decentralized identity platform allows humans and machines to interact together through a set of secure protocols and shared standards, where they can sign cryptographic facts or issue specific permissions or credentials. …


When we went public on our plans to build our own network (Arcadia testnet announcement) we made one thing clear: that we are not leaving Stellar but rather extending our capabilities and gearing towards an interoperable solution.

Why Interoperability

When looking at the decentralization and blockchain ecosystems something is immediately evident: a main part of the community is centralizing their efforts on one platform, Ethereum. This is leading to a situation, where people tend to see the chain with the most users as a “one size fits all” platform. When building Nodle, we learned that this wasn’t true. There is no one…


At Nodle, we recently announced the launch of our Arcadia Testnet. I’m happy to share that it is up and running with success after a few network-wide changes and bug fixes. Today I’m going to cover how we proceed with such upgrades and who has control over it.

View of the network on the Polkadot Telemetry portal

Arcadia as a Self Amending Ledger

Arcadia has the possibility to modify its own code and is able to evolve by itself over time; this is often referred to as “self-amending”. I like to compare it to a kid picking up new skills. …


It is known that in IoT the ‘S’ stands for security and the ‘P’ for privacy… This article introduces a new, secure and private way to identify IoT devices.

When operating an IoT network one may classify all of the IoT devices in two distinct classes: the ones that don’t need to be uniquely identified and the ones that need to be identified. …


Photo by Artur Westergren on Unsplash

I recently got my J1 Visa and will depart for San Francisco soon, thought I would share my J1 Visa experience with others in the hope that it will be useful to someone else.

Step 1: Finding work and a sponsor

The J1 Visa is split in different categories: the “Intern Visa” for performing a (paid or unpaid) internship, the “Trainee Visa” for performing a (paid or unpaid) training and the “Work and Travel Visa” if you want to do a seasonal job. I have the “Intern” variant and will focus on it in this post.

In order to get your visa you will need to find…

Eliott Teissonniere

Ex CTO BitNation, Head of Blockchain Nodle.io, Founder Nuclei Studio and CoFounder Governance Research Institute. eliottteissonniere.com

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