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A from-scratch tour of Bitcoin in Python

karpathy.github.io

251–260 of 293 posts

Re: A from-scratch tour of Bitcoin in Python

#251

Earlier quoted context omitted.

From Strike CEO Jack Maller [1]: Let’s walk through a user story. I want to send $1,000 to a friend of mine in El Salvador: * When I initiate the $1,000 payment, Strike debits my existing USD balance. * Strike then automatically converts my $1,000 to bitcoins ready for use in its infrastructure using its real-time automated risk management and trading infrastructure. * Strike then moves the bitcoins across the Gulf o…

Is Tether now backed by a reasonable amount of real dollars? I'm surprised to see it being used in such a serious application after years of hearing how it was a scam. edit: looked it up, still looks like a total scam. I hope El Salvador is able to get through this without getting screwed and I guess I'll assume Strike (first time I've heard of it) is just as shady until I hear otherwise: https://coingeek.com/crypto-…

Strike is phasing USDT out

https://finance.yahoo.com/news/strike-phasing-usdt-bitcoin-b...

Re: A from-scratch tour of Bitcoin in Python

#252

Earlier quoted context omitted.

Why does every discussion about Bitcoin's environmental impact reduce to "it uses a lot of electricity therefore it should be stopped". We're not going to shut down entire sectors of the economy because of their environmental impact. People are going to innovate and invest in alternative sources of energy because it is becoming profitable to do so. The solution is hardly ever "just stop doing it", it's "how can we do…

Crypto is hardly a "sector of the economy". It's main utility right now is lining the pockets of a few speculators. Traditional centralized ledgering systems do everything crypto does better and with a fraction of the energy use. It also gives governments tools to combat inflation/deflation and manage counterparty risks within the system. Crypto is a neat idea, but in the end it doesn't really solve anything, and ins…

It pains me to see how someone could see no value in having a medium of exchange outside of any government currency control. One of my ex-coworkers had his family's fortune wiped out twice in Argentina due to government seizure and hyperinflation before they fled to Canada.

Re: A from-scratch tour of Bitcoin in Python

#253
post #24

I'm amazed that he has time for this kind of hobby work.

A lot of busy, smart people have seemingly random side-projects. For example, Von Neumann: "A professor of Byzantine history at Princeton once said that von Neumann had greater expertise in Byzantine history than he did" [1] I don't know for sure why, but I think two possibilities are likely: (1) An extremely strong, natural intellectual curiosity and/or (2) Working on other things allows them to bring fresh ideas/in…

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Re: A from-scratch tour of Bitcoin in Python

#254

This is reminds me of Ken Shirriff's 2014 "Bitcoins the Hard Way" blog post that also used Python to build a Bitcoin transaction from scratch: http://www.righto.com/2014/02/bitcoins-hard-way-using-raw-bi... (The subtitle of the blog is "Computer history, restoring vintage computers, IC reverse engineering, and whatever" and it is full of fascinating articles, several of which have been featured here on HN)

Ken's blog is great, as well as his work with CuriousMarc. Here's when he tried mining bitcoins by hand.

http://www.righto.com/2014/09/mining-bitcoin-with-pencil-and...

Re: A from-scratch tour of Bitcoin in Python

#255
post #208

This is reminds me of Ken Shirriff's 2014 "Bitcoins the Hard Way" blog post that also used Python to build a Bitcoin transaction from scratch: http://www.righto.com/2014/02/bitcoins-hard-way-using-raw-bi... (The subtitle of the blog is "Computer history, restoring vintage computers, IC reverse engineering, and whatever" and it is full of fascinating articles, several of which have been featured here on HN)

Thanks for the nice mention of my blog. I was wondering if anyone remembered my old bitcoin article :-)

We do

Re: A from-scratch tour of Bitcoin in Python

#256
post #99
post #65

Earlier quoted context omitted.

> There is exactly zero progress to make it scale in the last 10+ years. Lol, literally this week: https://taproot.watch/

Segwit was also supposed to scale Bitcoin, and it turns out it was a massively inefficient solution, which took years to even reach it's lackluster potential. Taproot will in practice have an even smaller impact, as it only affects special transactions that normal people won't use. So yeah, it's not zero progress, but it's certainly not much.

Bitcoin Cash has taken the approach that Bitcoin should have. On chain scaling.

Re: A from-scratch tour of Bitcoin in Python

#258
post #232

Earlier quoted context omitted.

From Strike CEO Jack Maller [1]: Let’s walk through a user story. I want to send $1,000 to a friend of mine in El Salvador: * When I initiate the $1,000 payment, Strike debits my existing USD balance. * Strike then automatically converts my $1,000 to bitcoins ready for use in its infrastructure using its real-time automated risk management and trading infrastructure. * Strike then moves the bitcoins across the Gulf o…

It seemed like an answer at first, but actually this answers absolutely nothing and I'm not even sure how it's related to the topic being discussed: * This guy starts talking about sending USD, but ends up talking about receiving USDT. USD != USDT. And while there are problems with sending USD across the border, there're absolutely no problem with sending USDT. And there's absolutely no problem buying USDT wherever y…

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Re: A from-scratch tour of Bitcoin in Python

#259
post #24

I'm amazed that he has time for this kind of hobby work.

A lot of busy, smart people have seemingly random side-projects. For example, Von Neumann: "A professor of Byzantine history at Princeton once said that von Neumann had greater expertise in Byzantine history than he did" [1] I don't know for sure why, but I think two possibilities are likely: (1) An extremely strong, natural intellectual curiosity and/or (2) Working on other things allows them to bring fresh ideas/in…

From this point of view intelligence and memory may be just like muscle: the more you use (train) it, the more is grows (performs well).

Re: A from-scratch tour of Bitcoin in Python

#260
post #142

Earlier quoted context omitted.

cough dotcom bubble. Seriously, investing money in a bubble is nothing to celebrate. That’s why it is called a bubble. It pops and many people loose their money.

Except this bubble is a bit more insidious because you have actors like Tether that are most likely creating a lot of artificial liquidity/demand. If there is a sudden loss of faith and enough actors start rushing for the exits, it will look something more like a musical game of chairs of who is left holding the bag of worthless Mickey Mouse dollars, by my estimation.

Absolutely, that is my biggest worry. And it has no true backing, apart from these pump and dumps.

The single question people in favor of crypto can’t answer is the value creation. Now crypto is a natural evolution of certain monetary services and techniques, but at the core it literally does nothing of value. In fact, one might argue that that is its prime feature in its current state.

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