This is the first part of a more technical talk where Andreas explores Bitcoin script, with examples from the 2nd edition of Mastering Bitcoin, focusing on the use of conditional statements, flow control, guard clauses and time locks. The examples will include advanced multi-signature scripts, hash time lock contracts and asymmetric revocable commitments. Then he answers questions about Bitcoin’s quirky bugs, where Bitcoin differs from Ethereum at a scripting level, how SegWit works, how consensus rules change, and whether Bitcoin is more than just a currency.
Watch Part 2 here: https://youtu.be/pQbeBduVQ4I
This talk took place at the San Francisco Bitcoin Developer (@SFBitcoinDev) meetup on April 3rd, 2017: https://www.meetup.com/SF-Bitcoin-Devs/events/238773843/
Review materials on the topics presented:
Chpt. 7: https://github.com/bitcoinbook/bitcoinbook/blob/develop/ch07.asciidoc
Chpt. 12: https://github.com/bitcoinbook/bitcoinbook/blob/develop/ch12.asciidoc
The fundamentals of Bitcoin script 2:17
Bitcoin’s operators 5:00
Creating transactions (P2PKH – Pay to Public Key Hash) 6:30
Public Key CheckSigs, security by obfuscating public keys 7:42
Redeeming the script 9:05
The RIPEMD160 hash operation 12:05
OP_EQUALVERIFY, OP_CHECKSIG, & the elliptic curve digital signature algorithm (ECDSA) 14:05
Summary 18:30
Illustrating scripts: Equal, EqualVerify, CheckSig, CheckVerify, CheckMultisig, CheckLockTimeVerify 19:45
Guard clauses 23:02
Script-based timelocks 24:53
Flow control statements, interactive artificial intelligence 26:50
If, Else, EndIf 28:35
Unlocking scripts, what conditional flows do in Bitcoin 33:55
1-of-2 multi-signature script 35:44
1-of-2 multi-signature script with guard clause 38:28
2-of-3 multi-signature script 41:30
2-of-3 multi-signature script with timelock guard clause 43:20
BIP-113, how time is referenced in Bitcoin 44:42
Backup clause & other nuances in multi-signature schemes 46:58
Game theory, complexity from simplicity 52:36
2-of-3 multi-signature script, unlocking 53:45
RELATED:
Bitcoin: Where the Laws of Mathematics Prevail – https://youtu.be/HaJ1hvon0E0
The rules of Bitcoin (part 1) – https://youtu.be/VnQu4uylfOs
The rules of Bitcoin (part 2) – https://youtu.be/vtIp0GP4w1E
Forkology: A Study of Forks for Newbies – https://youtu.be/rpeceXY1QBM
Irreversibility and consumer protection – https://youtu.be/R107YWu5XzU
Andreas M. Antonopoulos is a technologist and serial entrepreneur who has become one of the most well-known and well-respected figures in bitcoin.
Follow on Twitter: @aantonop https://twitter.com/aantonop
Website: https://antonopoulos.com/
He is the author of two books: “Mastering Bitcoin,” published by O’Reilly Media and considered the best technical guide to bitcoin; “The Internet of Money,” a book about why bitcoin matters.
THE INTERNET OF MONEY, v1: https://www.amazon.co.uk/Internet-Money-collection-Andreas-Antonopoulos/dp/1537000454/ref=asap_bc?ie=UTF8
MASTERING BITCOIN: https://www.amazon.co.uk/Mastering-Bitcoin-Unlocking-Digital-Cryptocurrencies/dp/1449374042
[NEW] MASTERING BITCOIN, 2nd Edition: https://www.amazon.com/Mastering-Bitcoin-Programming-Open-Blockchain/dp/1491954388
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Music: “Unbounded” by Orfan (https://www.facebook.com/Orfan/)
Outro Graphics: Phneep (http://www.phneep.com/)
Outro Art: Rock Barcellos (http://www.rockincomics.com.br/)
awesome question about consensus of time!
Got referred to this miner on whatsapp on +18626219611 his script got me 2btc back very good and reliable
very cool !
Thank you Anto…This is 8th repeat….I fill repeat 200th…Good lecture….???
Thank you anto…You are our Hero…..Korean hero…????????
please more like this!
And all these free; One of the reasons I love crypto space is: the great people
This is My kinda Drug
Thank you thank you thank you
11:43 It doesn't look like OP_DUP pops anything off the stack, but rather it just references the top item and pushes it again: https://github.com/bitcoin/bitcoin/blob/master/src/script/interpreter.cpp#L652-L656
Regardless, this is a very good explanation! 🙂
Did you say you wrote Eliza??? OMG, that was one of my favorite programs that I used to run on my TRS-80 Model I. That's hilarious!
Wow he is a legend in the makeing IG: juber_aliec for noobs i watch this stuff to teach with memes shout me out we will get mass adoption faster
This is awesome! Went thru articles after articles to make sense out of this script mumbo jumbo and this is the only thing that makes sense. Thanks!
I'm not a programmer by any means.. But "most" of this wasn't over my head. Thanks A.A. I loved this.
Lost me at 1+1
Left handy are always smart
Suddenly a highschool level of programming knowledge is severely insufficient to follow even 10% of whats being said lol
ADVANCED BIG BANG TALK :>) A true (un)polished multifaceted passionate Crypto diamond!
Modern Robin Hood of Economy. Well educated, interested, experienced Metaphorical connecting our financial past and future from with passion!
From Technical, Biological, Medical, Economical, Anthropological and IT perspective. Very enriching for navigating (financial) life! Greeting from Amsterdam
very complicated
420th like. thank you for everything Andreas, we love YOU!!!
I think Andreas created Bitcoin and Blockchain
28:14 did Andreas just clam he's the author of Eliza?
"It is not enough to have a good mind; the main thing is to use it well."R DESCARTES