edilmedeiros
Edil Medeiros

https://edil.com.br

Bitcoin Educator and Professor on Computer Engineering at the University of Brasília 🇧🇷

Public Key

npub1uu8sdgm7geznwnaxhfgqs5wp6slhpm8tsdy6u852v72jawyk0faqc3hr2k

NIP-05 Address

edil@nostrplebs.com

NIP-57 Address

edil@walletofsatoshi.com

Profile Code

nprofile1qqswwrcx5dlyv3fhf7nt55qg28qag0msan4cxjdwr69x09fwhzt857spr3mhxue69uhkummnw3ezumt4w35ku7thv9kxcet59e3k7mgpr9mhxue69uhhq7tjv9kkjepwve5kzar2v9nzucm0d5sftd70

Publishing to

nostr.mutinywallet.com

pyramid.fiatjaf.com

relay.primal.net

Author Public Key

npub1uu8sdgm7geznwnaxhfgqs5wp6slhpm8tsdy6u852v72jawyk0faqc3hr2k

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Last Notes

2025-05-05 15:46:31

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Have been using Ghostty for some time, quite happy with it. Used iTerm before. iTerm seem to interact better with emacs on the terminal, but I switched back to the gui version.

2025-04-30 12:57:03

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I'm more inclined to say that Part 3 is the most important (transaction semantics) for other protocols development and that's what's on my mind right now.
Part 5 would be the foundation of consensus. Thinking out loud, maybe I'm taking consensus for granted during the previous parts.
In the overview of Part 1, I plan to explain all the mechanics, including distributed consensus, but without going into the details. Indeed, I feel it didn't work well last year. Maybe I should consider a lecture dedicated to consensus.
Thanks.

2025-04-27 20:20:33

I'm officially turning the recordings of my Bitcoin course lectures (in Portuguese: https://www.youtube.com/playlist?list=PLfdR3_dt2rbexb-ohbaLLzAuNAp7Ypt8u) into a coherent set of lecture notes.
This is a work in progress and will be developed at: https://github.com/edilmedeiros/bitcoin-course

2024-11-20 01:25:21

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You have a chain for that…

2024-11-13 02:59:47

How much does it worth (not how much it costs) to send IP packets over the internet nowadays?
That's the expected value of one satoshi in a future where bitcoin is as omnipresent as the internet.
The screen price tells you nothing about the true value of Bitcoin.

2024-11-08 03:29:25

It's happening!
https://m.primal.net/LwOE.jpg

2024-10-28 23:21:44

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Imagine an obsidian vault backed by nostr, maybe with optional encryption and a way to selectively unencrypt selected notes to share with others.

2024-10-27 16:04:36

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Suppose I have 15 addresses generated from a single seed and they all received 0.1 BTC. You don't know all the addresses are mine. Do they count as 15 shrimps or as a crab on the chart?

2024-10-25 02:09:03

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Congrats!

2024-10-21 17:17:41

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Valeu!

2024-10-21 13:14:15

Vai ter Bitcoin na universidade pública. Será que sai uns bitcoiners daí?
BTW, você pode assistir às minhas aulas no YouTube: https://youtube.com/@edilmedeiros?si=HGAVqLEjRi72MmlH
https://m.primal.net/LdKk.jpg

2024-10-17 02:56:11

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São Paulo is nice, Satsconf is great. I recommend you also consider btc++ in Florianópolis next year, one of the best cities in Brazil to chill out in the beaches.

2024-10-15 17:21:33

One of the main drawbacks of building a trustless network is that people naively come to believe that trust is a bad thing.
Bitcoin is trustless in a very strict sense, of not requiring an authority to clear transactions.
Yet, you (probably) still trust:
1. ECC is not broken and will not break in the foreseeable future.
2. SHA256 and Ripemd160 will not break either.
3. The node software you run is not compromised.
4. The wallet you use is not compromised.
5. The OS you run is not compromised.
6. The many pieces of hardware you use are not compromised.
7. Your connection to other nodes is not compromised.
Most of all, you trust other people will want to use Bitcoin, otherwise it's worthless and a waste of time.
Even Satoshi trusted in the community to keep developing Bitcoin: "I’ve moved on to other things. It’s in good hands with Gavin and everyone."
You just can't verify everything yourself, you have to start from somewhere and built upon.
Don't be a trustless lunatic.

2024-10-13 17:38:58

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I also see that it has a transifex project open, but no Brazilian Portuguese translation yet. I'll setup it up and see what I can do.
How are translations reviewed, in case of a language you can't understand?

2024-10-13 16:49:35

What a delight it is to go through Grokking Bitcoin by @npub1g9y…y05t.
The best book I ever found to serve as the foundation for an excellent undergrad course. As a bonus, published as open source: https://github.com/kallerosenbaum/grokkingbitcoin
Why did I only find it after my classes have already started?

2024-10-07 02:52:54

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Tô dentro, volto pra Brasília nesta sexta-feira.
Tem o @npub1d2x…eu8n aqui também.

2024-09-30 20:33:09

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Excellent. Any plans to remove miniupnpc as well?

2024-09-18 17:13:41

Quando eu digo que pra um advogado que ele PRECISA aprender o mínimo sobre o funcionamento da Internet, sempre recebo algum sarcasmo de volta.
Até a hora que passa uma vergonha dessas…
Sem enforcement, não existe lei. E na Internet, poucas coisas podem ser de fato enforced.
https://m.primal.net/KtzC.jpg

2024-09-16 14:51:46

I'm not a dev, may I contribute to open source?
Yes!
https://medium.com/all-things-product-management/product-manager-you-are-664d83ee702e
https://bitcoinproduct.substack.com/p/foss-contributor-interview-2-elsat

2024-09-16 12:12:12

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Sacanagi

2024-09-15 12:05:13

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Tested

2024-09-12 23:25:27

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Veio e foi embora e eu nunca vi essa opção.

2024-09-12 19:11:57

"Professor: If You Read To Your Kids, You’re ‘Unfairly Disadvantaging’ Others"
Professor of Philosophy: “I don’t think parents reading their children bedtime stories should constantly have in their minds the way that they are unfairly disadvantaging other people’s children, but I think they should have that thought occasionally,”
But he reveals himself, it's only a perverse anticapitalist mindset: “we could prevent elite private schooling without any real hit to elite family relationships.”
I truly understand a professor who don't have to care about the real world saying such nonsense. I'm a professor myself, I know what I'm talking about.
But I can't swallow people doubting themselves because of pompous titles. This is how the reporter finishes her article.
"In general, I tend to believe that focusing on improving things for the less fortunate is a better way to advance our society than purposely making things worse for those who have more, but what do I know? After all, it’s not like I’m a philosopher or anything."
Come on, you see something is wrong and you doubt yourself instead of questioning it? This is just an anecdote that shows why traditional media is so doomed.
https://www.nationalreview.com/2015/05/professor-if-you-read-your-kids-youre-unfairly-disadvantaging-others-katherine-timpf/

2024-09-12 18:24:11

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We just launched a program for people interested in contributing to open source Bitcoin projects as a way of living, maybe you'll be interested: https://vinteum.org/bdl/

2024-09-11 21:02:53

Hoje teve live no Bitcoinheiros em que falamos mais sobre o Bitcoin Dev Launchpad: https://www.youtube.com/watch?v=kgOnckZ7-Ok

2024-09-08 23:28:28

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Looks like art?

2024-09-08 12:22:37

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Foi o que?

2024-09-05 19:22:12

Hoje a @npub13s0…5g70 lança o programa de capacitação para devs brasileiros em projetos open source de Bitcoin que estamos construindo juntos.
Muito feliz de ver esse projeto avançando e ansioso para contribuir ainda mais com o ecossistema Bitcoin no Brasil.
#note159s…q4sh

2024-09-04 03:24:33

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Welcome and enjoy the ride.

2024-09-03 23:03:19

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Mais provável que vão empurrar com pequenas reformas por anos a fio, com algumas mudanças maiores a cada 15 anos mais ou menos. Vai ser um processo longo e gradual de carestia.

2024-09-03 20:38:43

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Eu com 40 anos poupando que nem louco e um monte de gente me perguntando se aposentadoria de servidor público não é boa… Meus colegas realmente não entenderam que não vai ter aposentadoria pra ninguém da nossa geração.

2024-09-03 20:36:08

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What a shame, doesn't? I leave for a walk twice a week without my cell phone, exactly to be able to appreciate the surroundings.

2024-09-03 03:00:30

I recently finished reading Better Money: Gold, Fiat, or Bitcoin?, by Lawrence White. While I’m preparing a proper academic review, maybe someone will appreciate some of the book’s main points.
- Strong historical material explaining different implementations of money.
- Quite basic supply-and-demand methodology for comparing gold, fiat, and Bitcoin. Yet, the common ground makes for a conscientious analysis, especially for pointing that Bitcoin’s purchasing power volatility is inherent to the system from an economic perspective.
Take aways:
1. “A gold standard has the advantage that the global stock supply curve for monetary gold is non-vertical in the short run and nearly horizontal in the long run, providing responses in the quantity that stabilize the purchasing power of gold, but the disadvantage that the supply curve can occasionally shift.”
2. “A fiat standard has the potential advantage that its supply can be deliberately managed to stabilize the price level both in the short run and in the long run, but the disadvantage that has seldom been managed that way in practice, due to the incentives that accompany government control over the quantity of money.”
3. “A Bitcoin standard has the advantage that the Bitcoin supply curve does not shift, but the disadvantage that the supply curve is vertical in both the short run and the long run, implying unstable purchasing power in the face of money demand variations.”
White is skeptical about a Bitcoin standard because of purchasing power volatility. He argues that people preferred stable monies over time and that the costs associated are high.
“My prediction is that BTC is unlikely to become a commonly used medium of exchange for the same reason, namely that its purchasing-power risk and transaction costs make it unattractive to use as a medium of exchange.”
My main critique: fiat money was created by governments (White explains the mechanics of this movement) and they have a higher cost over society in the form of inflation (as he argues with historical evidence). It was done because of political reasons, not economical. I would not overlook people coming to accept higher purchasing power volatility of an eventual Bitcoin standard if governments stay in the last century’s track of increasingly assault over the institution of private property.
Does it worth reading?
Definitely, it will expand your knowledge about monetary systems and understand some fair critiques about Bitcoin.

2024-09-03 01:23:26

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Today was Chest day 💪

2024-09-02 22:06:00

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Do 100 push-ups count? 😅

2024-09-02 21:30:00

Congrats @npub1d2x…eu8n 👏
#note1325…ju7j

2024-09-02 15:08:45

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O máximo possível. O tempo é o fator mais importante é o seu efeito é exponencial, tanto para ajudar quanto para atrapalhar.
Quer dizer, se você começar na metade do caminho, precisa poupar mais que o dobro a cada mês para chegar no mesmo resultado.
Eu comecei com 33 anos e procuro poupar cerca de 30% da minha renda todos os meses, incluindo os extras que eventualmente consigo (sim, 30% é muito e exige muita força de vontade). Depois de 6 anos não posso reclamar da tranquilidade que isso me dá, mas creio que vão ainda uns bons 15 anos pra eu cogitar viver de renda.

2024-09-01 01:53:26

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Welcome and enjoy the ride.

2024-08-31 23:56:54

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Alterno entre Primal e Damus pra entender qual seria o mais bem acabado.

2024-08-31 22:01:16

Have you watched Game of Thrones?
It's a fictional representation of what happened in all times and places: small folk have nothing to do and, apart from making jokes, care very little for the quarrels and plots of rulers.
Rulers are capable of turning its people outlaws and impose unfair punishment over them for supposed crimes they didn't participate.
But after sufficient time, what happens?
Either bloodier plots or a war.

2024-08-31 20:07:57

Que lama jurídica.

2024-08-31 16:34:57

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He doesn't have this much power.

2024-08-31 15:03:34

Well, I wasn't expecting nor hoping this would mature so well when I drew it in 2022.
https://m.primal.net/KXNv.png

2024-08-31 13:15:34

Who pays for Bitcoin block rewards?
Bitcoin hodlers do.
The payment is hidden by the more apparent appreciation in price when compared to the unit of account (e.g., dollars), but nonetheless real.
By contrast to a world in which block rewards are zero, and so miners receive only fees, block rewards expand the pool of BTC in circulation, diluting the purchasing power of each existing BTC unit (holding real demand constant).

2024-08-31 12:25:37

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Unfortunately, this will get worse ☹️

2024-08-31 12:16:32

I would like to remember that the technologically incompetent decisions we are witnessing in Brazil come from the same court that manages our election system.

2024-08-31 03:30:30

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☹️

2024-08-30 15:08:28

Politics under a democracy involve a curious psychology.
You trade your incapacity to control market agents that can’t coerce you for the incapacity to control the political agents that can coerce you.

2024-08-30 02:31:37

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So far, Damus looks better, Primal seems to work better. 🤔

2024-08-30 02:14:43

Primal or Damus?

2024-08-29 18:33:52

Bitcoin is bad because it's backed by nothing… 🫠
“Over the years, all the governments in thew world, having discovered that gold is, like, rare, decided that it would be more convenient to back their money with something that is easier to come by, namely: nothing."
Better Money, L. White

2024-03-06 21:35:03

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Thanks for pointing out, but can't see how this would promote accretion of knowledge since the interface looks centered on individual perspectives and not on the knowledge entry itself.
https://m.primal.net/HiQO.png

2024-03-06 15:50:46

Every online resource is someone else's computer. There's no free lunch.
Don't take valuable resources for granted. Consider paying a subscription or donating a small amount if you can. In the case of Wikipedia, you can also contribute by correcting mistakes or writing technical articles.
Most "free" services are indeed paid by ads, incentivizing people to create addictive crap instead of true value. We end up with bloated platforms in which the gems are buried in a sea of nonsense.
That's also why I'm experimenting with #nostr: zapping gives users the power to decide what is valuable enough to be paid for.
https://m.primal.net/HiLJ.png

2024-03-01 14:23:24

Yesterday, I gave a talk about the principles behind the #bitcoin protocol. This is part 1, covering:
1. the problem we need to solve to build an #economy based on digital transactions;
2. the bitcoin transactions data structures; and
3. the embedded programming language that makes #money programmable.
https://youtu.be/vOiRQoLhIoY?si=n-KXjr1Tf8UB66nk

2024-03-01 01:06:40

The more I dig into the nitty-gritty of the protocol, the more convinced I am that #bitcoin truly is the internet of money.
It's not only a superior form of money but also a platform for supporting financial applications we can barely imagine right now. Feels just like the #internet in the year 2000, just before we woke up and realized all aspects of our lives depended on it.

2024-02-25 01:40:07

AI will kill coding just like restaurants killed home cooking and Spotify killed live performances.
https://twitter.com/ammohitchaprana/status/1760619467019804878/video/1

2024-02-24 03:20:33

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Yeap

2024-02-24 03:20:19

Historical picture revealed today: Satoshi Nakamoto attending the bitcoin++ conference in Argentina in 2024.
#btcplusplus #vinteum #base58
https://m.primal.net/HenZ.jpg

2024-02-13 18:30:32

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I'm studying the Bitcoin protocol in the Chaincode Labs program, and someone commented about it, so I'm checking it out.

2024-02-13 17:51:58

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Thanks, Derek. Trying to understand the protocol and applications built in it.

2024-02-13 17:41:47

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Obrigado!

2024-02-13 17:41:13

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I just learnt about it, trying find my way on it.

2024-02-13 17:38:30

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Hey, thanks! First lightning transaction I ever participated.

2024-02-13 17:37:52

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I tend to not agree as bitcoin is based on real physical processes to be issued.

2024-02-13 17:35:21

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Thanks!

2024-02-13 17:34:43

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Thanks!

2024-02-13 17:34:34

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Thanks, @npub1h50…rqev Trying to find my way here.

2024-02-13 14:30:06

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Just figured out how to make it work.

2024-02-13 14:28:31

@npub1kuy…kdj8 I wanted to say thanks for your video about how to connect a LN wallet to Damus. I just got started on this nostr thing and it was quite helpful.

2024-02-13 14:22:06

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I received my first sats from a friend in a study group back in 2013, he was trying to show me this new system of payments. Since them, I've been hoarding bitcoin, but never used it for buying anything. Why pay for stuff in strong money if I can spend fiat? Now I'm looking to leave academia and be paid in real money for good.

2024-02-13 04:23:24

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I'm from the field of embedded systems originally but have been working on functional programming and models of computation more recently. About bitcoin, I'm still digging the internals of the protocol before focusing on an specific subfield. Also, I'm attending chaincode labs FOSS program in the hope to accelerate my learning.

2024-02-12 22:36:26

I'm a professor of electronics and computer engineering at the University of Brasília, currently pivoting my skill set to the bitcoin space.
#introductions