Alex Waltz Profile picture
Directing @SatsDontExist movie. I tweet 1 Bitcoin fact/day. Check Highlights. Photography: @waltz_on_film
May 4 8 tweets 3 min read
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Here are 7 interesting comments Satoshi left in the original Bitcoin client(2009)

Yes, he actually wrote this one.
"This is why people hate C++"

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Satoshi explaining what is a Blockchain Image
Apr 28 13 tweets 4 min read
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Before launching Bitcoin on 8 Jan 2009 Satoshi had an early version coded.

Known as the November 2008 Version.
Different block time, reward, difficulty adjustment, and more.

Here are the 10 changes he made to what became Bitcoin as we know it today.

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Satoshi decided not to start mining until other peers were on the network.

This shows the 1st block was NOT pre-mined.

Also, a measure to avoid hard-forks in the 1st few blocks. Image
Apr 18 27 tweets 6 min read
I tweet 1 #Bitcoin fact per day

(round #2)

🧵Here are the ones made so far👇
Feb 5, 2024 11 tweets 3 min read
I have obsessively been studying #Bitcoin for the last decade.

Here are 10 counter-intuitive and mind-blowing #Bitcoin facts I collected over the years.🤯
Jan 14, 2024 12 tweets 4 min read
1/12
Did you know @ElectrumWallet was the 1st #Bitcoin deterministic wallet?

Before this people used to backup each individual key, and there was no restore function.

Also, the 1st wallet to implement "mnemonic" backups, way before BIP39.

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Electrum wallet was announced on 5 November 2011 as a Lightweight Bitcoin Client.

It was the 1st modern Bitcoin wallet and brought features that improved the UX by 100x.

You did not have that many options back then.Image
Jan 4, 2024 8 tweets 2 min read
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Did you know Block #481,947 is the 1st block to be mined bigger than 1MB?

It was mined on 25 August 2017 by BitFury and had a size of 1.03 MB.

How can we have blocks bigger than 1MB?
What are SegWit Blocks?

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It's possible because it is a SegWit Block.

That is NOT the 1st SegWit block, that would be Block #481,824, when SegWit was activated.

Mined on the 24th of August it included 2 SegWit Transactions.

Notice addresses start with "bc1q"Image
Dec 30, 2023 14 tweets 4 min read
1/14

The story of 1111111111111111111114oLvT2 #Bitcoin address.

How does a Bitcoin address work?

What is a burn address?

Why is there so much money here?

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A bitcoin address is a hash of something.
In the old days of a public key, which is the case with the address we are interested in.

However since '12 at block 173,805 when BIP16 got activated, you can send a Script Hash.

Btw addresses don't exist on the blockchain!
Aug 15, 2023 32 tweets 13 min read
1/32

JoinMarket is a decentralised, non-custodial, CoinJoin Implementation.

It is market-based and allows you to CoinJoin any amount.

- What it is
- History behind it
- How it works

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Contrary to what a lot of people believe, #Bitcoin is not private.
It is pseudo-anonymous.

With low effort, anyone can see your FULL transaction history.

Once a link is made with you and your Bitcoins, it can be followed on-chain.
Sep 13, 2022 31 tweets 12 min read
1/31

The Difficulty Adjustment is the great missing innovation that made #Bitcoin work.

While it ensures that Bitcoin's supply is predictable it also is a:

- fundamental security mechanism
- self-regulating mechanism
- crucial consensus component

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Since its inception #Bitcoin adjusted its difficulty 373 times.

For the 1st year of its existence, the difficulty did not increase, the 1st "big" change taking place on 2010-01-01 ~ block 32,256.

The biggest changes are:
- upwards being 302%
- downwards 27% Image
Aug 1, 2022 6 tweets 2 min read
1/n

This is very interesting.

borderwallets.com

It provides a solution to memorizing BIP39 seeds.

This is done by scrambling the BIP39 wordslist and then drawing an 11/23 cell pattern on this new list.

Images are easier to memorize compared to words. Image 2/n

The trade-off is now that you back up the list itself instead of the words.

So you are effectively "encrypting" your scrambled wordlist with the visual pattern.

The catch is that the drawing order of the pattern matters. Image
Oct 18, 2021 38 tweets 14 min read
1/38
🌱📝@SeedSigner - Assembly, Usage, & Review.

SS is the new cool kid on the block when it comes to #Bitcoin DIY HWW.

Highlights:
- QR seeds
- non-persistent
- ONLY personal entropy
- general-purpose HW
- cheap

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✅PREP

Part list:
- Raspberry pi zero(no Wifi)
- SD card
- Waveshare 1.3" LCD
- AuviPal 5MP camera with OV5647 Sensor
- MakerHawk ribbon cable
- GPIO Hammer Header Male
- 4 x (F-F M2.5 spacers 10mm; M2.5 pan head screws 6mm; M2.5 pan head screws 12mm )
- case + buttons
Oct 4, 2021 14 tweets 4 min read
1/14
🎲How does Bitcoin Core generate entropy for private keys?

Mixing entropy from 4 main sources:
- low-level processor instructions
- entropy from the OS
- dynamic events
- static events

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Bitcoin Core is the reference implementation of the Bitcoin protocol.

It's a direct descendent of the code released by Satoshi and has the smartest people on the planet working on it.

Its also the most used, and the most reviewed Bitcoin software. Image
Sep 2, 2021 12 tweets 6 min read
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⚛️I made my own Quantum Random Number Generator.

It uses radioactive decay to generate entropy for #Bitcoin seeds.

I used:
- Americium 241 from a Smoke Detector
- RaspberyPi
- Geiger counter
- Audio interface.

Entropy is what makes a bitcoin your bitcoin.

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Dices and cointoses are a good way to generate your own entropy, but they are not actually random.

They are deterministic processes that are hard to measure.

Is there anything random in the universe?
☢️Yes, radioactive decay.
Jul 5, 2021 10 tweets 5 min read
1/
List of cool data science #Bitcoin websites.

📉A lot of charts.
(no price data).

If you want to know what’s going on in Bitcoin you should check these daily.

From on-chain statistics to CoinJoin volumes to fee estimation.

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mempool.observer

By @0xB10C

Allows you to:
- Visualise the Mempool
- Check a TX in the Mempool
- See the time difference between blocks
Mar 29, 2021 14 tweets 5 min read
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What is @Liquid_BTC and why is it interesting?

What are the trade-offs and are why they are worth it?

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@Liquid_BTC is a side chain-based settlement layer.

Meaning that it actually is another blockchain that is linked with the Bitcoin blockchain through a federation and some Bitcoins locked in a multi-sig.

Even though it doesn't sound like much, it
allows for cool things.