In this post, we’ll explore what multisig wallets are and how to use Gnosis Safe to manage your funds and transactions.

Type of accounts in Ethereum

Let’s start with some basics. Accounts are fundamental Ethereum components that can hold funds and execute transactions, read or write. If you think of Ethereum as a state machine then a write transaction can modify its state. In order to execute a transaction, you need to pay a fee (gas) to the miners who will update the blockchain.

In Ethereum we have 2 types of accounts:

  • Externally Owned Accounts (EOA) or simply wallets. These wallet are identified by a…


  1. Spend less time on Social media—take a social media diet.
  2. Read the news once a day or once a week.
  3. Have a todo list every day, add to your list things you’d do anyway such as “make the bed”, “breakfast” and “drink water”. Checking a few things will make you feel accomplished and will push you to do bigger ones!

Take breaks and enjoy your summer! Or whatever season you’re reading this.


The Bitcoin White Paper is a freaking rabbit hole. To understand it you need to know about cryptography, networking, game theory, economics, computer science and so on. I’ll try to simplify it for you!

To understand the paper you’ll have first to understand:

  1. The Byzantine Generals’ Problem (BGP), watch the video to grasp the concept.
  2. Double-spending problem: this is the central topic of the paper, how to avoid someone to copy/paste the digital cash in a decentralized system.
  3. Hash functions, used for finger-printing transactions and other things.
  4. Asymmetric Cryptography, used for digital signatures.

Bitcoin: A Peer-to-Peer Electronic Cash System


Stay focused 100% on one task and one project is my biggest struggle.

I just finished reading Hyperfocus by Chris Bailey. The book has a lot of “Yeah I knew that” moments in it, but it’s also rich with valuable suggestions, and planning tools. So I thought to write a blog post to crystalize what I just read.

Hyperfocus by Chris Bailey and The Leading Brain — my next read

Highlight when you read a book and take notes inside it.

Switching off autopilot mode

You often catch yourself doing stuff on autopilot. Being in the moment and aware of what you do can help you to improve your focus and productivity.

You can organize your…


Hello! Part 1, Analysis of Facebook Libra, was about the Libra white paper. Part 2 is about the Libra Blockchain white paper, also called yellow paper. I’m going to highlight what I think important and explain it. So let’s go!

First Page

This is not your typical crypto white paper full of shit. It has 45 authors, product managers, engineers, researchers, and economists. Surprisingly just a few of them have prior blockchain experience. Weird.

Libra is a decentralized, programmable database. Ah! Is not a blockchain!? No is not, as we’ll see in a moment.


There’s a lot to cover about the Libra project and a lot more to uncover. I’ll take it one step at the time. In this first blog post, I’ll analyze the Libra project and do a 10k feet introduction–sharing some of my thoughts on it.

What is Libra

Libra is a programmable stablecoin created by Facebook. The stability comes from a reserve backed by a basket of fiat currencies and other assets with low volatility. Libra is made by 3 parts:

  1. The Blockchain, which holds the transaction history.
  2. The Reserve, which keeps the currency stable.
  3. The Libra Association, responsible for the governance and…


Your co-founder got a brilliant idea to solve the problem of saving all the kitties in the world. Fantastic! He raises the money and you take care of building the product.

He gets just enough to run for 3 months. Your idea is to create a kitten-rescue team and then a market place for kitties to give them in adoption. Then your co-founder asks you for a mobile app, a web app, with a cool design, and ask you do get it done in ONE month, because “each second our idea is not built a kitten dies!”.

You can only…


These past years I spent too much time studying cryptocurrencies. I was reading white papers, checking GitHub repositories, running trading analysis, aggregating information from different APIs, and attending Programming Blockchain by Jimmy Song.

My attempt to predict the price was most of the time wrong. Sometimes the price was lower than I predicted, more often higher. Trading is full of booby traps. The only way to survive is by having a strategy, with a stop loss, stop winning, and a lot of discipline to avoid falling into FUD/FOMO. Unless you plan to do HODLing for 10+ years, kudos to you!

What determines the price of a cryptocurrency?


TL;DR; A non-spiritual guide on how to filter the noise, and reach inner peace.

Almost inbox zero

Big Data — The noise

We live in the information age, where data is a commodity in many cases more valuable than paying actual customers.

Since the dawn of time up to the year 2003, humans had created 130 exabytes of data. In the last 15 years, we produced 10 times more data than in the rest of our existence, and this trend is only growing exponentially.


While going through my blog posts on Medium I found this one from 2014. I like when past me is right, although I was big time wrong about saying “it took me two years to understand Bitcoin”, that’s obviously a bias from the Danning-Kruger effects, the truth is that I didn’t understand it back than and I still don’t fully understand it today, and anyone who tells you “I’m a Bitcoin expert” you should raise your brow and ask, which area of Bitcoin are you an expert in and for how long have you worked in it?

Yesterday (Set 2014)…

Federico Ulfo

I grow startups and I connect people. I used to play with Lego, now I play with Kubernetes and Bitcoin.

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