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We will try to answer the following questions in less than 20 minutes. The goal is here is to have a basic understanding of money and its future aka DeFi

apes like money

The three functions of money

It is first important to understand why we need money and what problems it solves.

Money as a Store of value


Photo by Antonio Janeski

Multi Signature Wallet lets you execute one of its functions only when a threshold of agreements is met.

Let’s create a multiSig wallet, which is a smart contract by the way, and deploy it on ethereum. Let ‘s assume that this smart contract address is 0x3471aa..

When we deployed the contract we stored the address of 5 administrators and set a threshold of 3 in the smart contract state. This means that if 3 out of 5 administrators agree, they can execute a function of this MultiSig smart contract.

So what are these functions ?

  • We can add or remove…

Multiple Identity One Subject | Photo by Carson Arias on Unsplash

original article https://blog.cogarius.com/index.php/2020/04/05/complete-guide-to-ci-cd-pipelines-with-drone-io-on-kubernetes-3-3-drone-metrics-with-prometheus/

TL;DR;

We will briefly discuss about why SSI is needed. Then we will talk about what are DIDs and how to resolve them using ethr-did from uport. This will lead to Verifiable Credential and Verifiable Presentation and how all these can help in a real life use case.

Self Sovereign Identity (SSI)

If you are here you probably already have the feeling that we need to have the sole ownership of our identity and total control over how our personal data is shared and used. This is by the way pretty much the definition of SSI.

The fact that one organization can…


Photo by Simon Rae on Unsplash

original article https://blog.cogarius.com/index.php/2020/04/05/complete-guide-to-ci-cd-pipelines-with-drone-io-on-kubernetes-3-3-drone-metrics-with-prometheus/

TL;DR;

You are running kubernetes and using an expensive yet easy and maintainable CI/CD pipelines.

You want to save money but don’t want to spend too much time migrating and don’t want to give up on features.

You want to be able to :

  • Push your images to your private docker registry
  • Monitor your build with prometheus
  • Access your hashicorp vault secrets from your pipeline.

This series of three articles will help you go through it with Drone CI !

Check the first post to setup the private registry, the drone server and the kube runner. The second…


Photo by Belinda Fewings on Unsplash

original article https://blog.cogarius.com/index.php/2020/04/05/complete-guide-to-ci-cd-pipelines-with-drone-io-on-kubernetes-2-3-drone-vault-extension/

TL;DR;

You are running kubernetes and using an expensive yet easy and maintainable CI/CD pipelines.

You want to save money but don’t want to spend too much time migrating and don’t want to give up on features.

You want to be able to :

  • Push your images to your private docker registry
  • Monitor your build with prometheus
  • Access your hashicorp vault secrets from your pipeline.

This series of three articles will help you go through it with Drone CI !

Check the first post to setup the private registry, the drone server and the kube runner. In this…


Photo by Sven Kucinic on Unsplash

original article https://blog.cogarius.com/index.php/2020/04/05/complete-guide-ci-cd-drone-io-on-kubernetes-kube-runner-private-registry/

TL;DR;

You are running kubernetes and using an expensive yet easy and maintainable CI/CD pipelines.

You want to save money but don’t want to spend too much time migrating and don’t want to give up on features.

You want to be able to :

  • Push your images to your private docker registry
  • Monitor your build with prometheus
  • Access your hashicorp vault secrets from your pipeline.

This series of three articles will help you go through it with Drone CI !

In this post we will go through the installation and setup of a private docker registry, Drone CI…


original article https://blog.cogarius.com/index.php/2020/03/13/a-vault-for-all-your-secrets-full-tls-on-kubernetes-with-kv-v2/

TL;DR

Install Vault via a Helm chart and configure it to access it through HTTPS all the way.

We will create a key value store (v2) and enable the userpass, approle and kubernetes authentication. We will define some policies and test them.

Finally we will configure the vault agent injector with TLS certificate to inject secrets through injector webhook thanks to annotations inside a POD.

Vault is a powerful tool for securing access to secrets. It comes with a lot of features like a Web UI, dynamic secrets, HA, data encryption, authentication, temporary secrets & revocation and logging.

TLS and certificates…for Vault


baking, delegating, rewards, deposit, seed generation, roll distribution, protocol updates, smart contract and more !

Blog post here

First thing first a little bit of history

Tezos foundation raised funds for Tezos project from 1 July 2017 to 13 July 2017.

Fundraiser collected 65,681 bitcoins and 361,122 ethers. Most of the contributions happened in the first few days. 62.5% of the contributions were in bitcoin, 37.5% in ether.

A that time it represented more than 230 millions dollars.

The total initial supply was 763,306,929.69 tokens.

Tezos aims at being a digital commonwealth, the best smart contract platform and ultimately useful for people.

How does Tezos compare with other smart contract blockchains ?

Tezos vs Ethereum vs EOS

*Ethereum miners repartition

*Tezos miners(bakers) repartition


Getting to know Blockstack by coding a decentralized social app

Meetup-Blockchain-Ethereum-Bruxelles

Here at Cogarius we love getting our hands dirty experimenting with new decentralized technologies. Blog post here

We are following what blockstack is building from some time now and we find their approach very interesting. Their goal is to

build an ecosystem that gives users control over their fundamental digital rights: Identity, data-ownership, privacy, and security
Needless to say it resonates with us !

How does it work ?
To put it simply blockstack enables you to build a decentralized app without the hassle of getting to know in depth the…


Hi folks,

Maybe you are wondering what a smart contract is. Maybe you think that you must have a Phd in computer science to be able to deploy one. Maybe you think that you will need specialized 16nm ASIC chip to get some ether to get your hands on this tech.

Well lucky you ! I will show you that a smart contract can be dumb simple to understand deploy and execute and that you will only need a browser to do that :)

First thing first what is a ethereum ? This article will not cover that.

To keep…

Cogarius

from ideas to solutions www.cogarius.com

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