Bitcoin Q&A: Locking Scripts and Transaction Verification
Channel: aantonop
Date: 2020-01-15

Explain the locking and unlocking scripts in transactions. How are transaction signatures verified by nodes and miners? What happens to unconfirmed transactions from orphaned blocks? Do non-mining nodes get a reward?

These questions are from the third and fourth sessions of MOOC 12, which took place on September 27th and October 4th 2019. If you want early-access to talks and a chance to participate in the monthly live Q&As with Andreas, become a patron: https://www.patreon.com/aantonop

RELATED:
Measuring Success: Price or Principle - https://youtu.be/mPMsbgWl9p4
Beyond Price: Bitcoin's Impact on the Future - https://youtu.be/rvwVbRQ5Ysc
Consensus Algorithms, Blockchain Technology, and Bitcoin - https://youtu.be/fw3WkySh_Ho
Advanced Bitcoin Scripting Part 1: Transactions and Multisig - https://youtu.be/8FeAXjkmDcQ
Advanced Bitcoin Scripting Part 2: SegWit, Consensus, and Trustware - https://youtu.be/pQbeBduVQ4I
What is Consensus: Rules without Rulers - https://youtu.be/2tqo7PX5Pyc
Forkology: A Study of Forks for Newbies - https://youtu.be/rpeceXY1QBM
Bitcoin: Where the Laws of Mathematics Prevail - https://youtu.be/HaJ1hvon0E0
Software distribution security - https://youtu.be/_V0vqy046YM
What is mining? - https://youtu.be/t4p4iMqmxbQ
The mining process - https://youtu.be/L4Xtau0YMJw
Nonces, mining, and quantum computing - https://youtu.be/d4xXJh677J0
Iterating nonces and the block reward - https://youtu.be/tjn2aoMaFlY
Miners, pools, and consensus - https://youtu.be/JHz7LM4ncLw
Mining, energy prices, and fee market - https://youtu.be/hrVCd6Pt4l4
What is difficulty targeting? - https://youtu.be/h429LCTRmQw
Hash functions, SHA-256 mining, and addresses - https://youtu.be/zI9jnB8HFkI
Genesis block and coinbase transactions - https://youtu.be/strhfzJ56QE
Cryptographic primitives - https://youtu.be/RIckQ6RBt5E
The rules of Bitcoin (part 1) - https://youtu.be/VnQu4uylfOs
The rules of Bitcoin (part 2) - https://youtu.be/vtIp0GP4w1E
Rules versus rulers - https://youtu.be/9EEluhC9SxE
The value of proof-of-work - https://youtu.be/ZDGliHwstM8
Could a state-sponsored 51% attack work? - https://youtu.be/KUd8ZGgm6Qo
Honest nodes and consensus - https://youtu.be/KAhY2ymI-tg
Spam transactions and Child Pays For Parent (CPFP) - https://youtu.be/t3c0E4fkSNs
Is Bitcoin a democracy? - https://youtu.be/TC3Hq76UT5g
Governments versus Proof-of-Work or Proof-of-Stake - https://youtu.be/qrwgYDAoZV0
Decentralized power, leaderless governance - https://youtu.be/E5VbDlQTPzU
What is the role of nodes? - https://youtu.be/fNk7nYxTOyQ
Why running a node is important - https://youtu.be/oX0Yrv-6jVs
Spam transactions and Child Pays For Parent (CPFP) - https://youtu.be/t3c0E4fkSNs
Energy consumption - https://youtu.be/2T0OUIW89II
Solar energy and mining in space - https://youtu.be/cusakcpa8AM
Bitmain and ASICBoost allegations - https://youtu.be/t6jJDD2Aj8k
Binance hack, chain rollback? - https://youtu.be/2cZhkV6BqLg
Block reward, reorg protection, and immutability - https://youtu.be/R6KMp6vkeVU
Price and hashpower metrics - https://youtu.be/5JBulDoy8Xk
Medium of exchange, unit of account, and reserve currency - https://youtu.be/ExuHOCyje-w
Limited supply and block subsidy - https://youtu.be/18iCvz9WpjU
Mining incentives after 2140 - https://youtu.be/LNSlIiKyZJM
10-minute block intervals and miner competition - https://youtu.be/rhZowbYpN3Q
Simplified Payment Verification (SPV) - https://youtu.be/OdjEhNdvTNM

Andreas M. Antonopoulos is a technologist and serial entrepreneur who has become one of the most well-known and respected figures in Bitcoin. He is the author of “Mastering Bitcoin,” “The Internet of Money" series, and "Mastering Ethereum."

Follow on Twitter: @aantonop https://twitter.com/aantonop
Website: https://antonopoulos.com/

Subscribe to the channel to learn more about Bitcoin & open blockchains; click on the red bell to enable notifications about new videos!

MASTERING BITCOIN, 2nd Edition: https://amzn.to/2xcdsY9

Translations of MASTERING BITCOIN: https://bitcoinbook.info/translations-of-mastering-bitcoin/

THE INTERNET OF MONEY, v1: https://amzn.to/2ykmXFs
THE INTERNET OF MONEY, v2: https://amzn.to/2IIG5BJ

Translations of THE INTERNET OF MONEY:
Spanish, 'Internet del Dinero' (v1) - https://amzn.to/2yoaTTq
German, 'Das Internet des Geldes' (v1) - https://amzn.to/2LEiyqO
German, 'Das Internet des Geldes' (v2) - https://amzn.to/2VCzse5
French, 'L'internet de l'argent' (v1) - https://www.amazon.fr/Linternet-largent-Andreas-M-Antonopoulos/dp/2856083390
Russian, 'Интернет денег' (v1) - https://www.olbuss.ru/catalog/ekonomika-i-biznes/korporativnye-finansy-bankovskoe-delo/internet-deneg
Vietnamese, 'Internet Của Tiền Tệ' (v1) - https://alphabooks.vn/khi-tien-len-mang

MASTERING ETHEREUM: https://amzn.to/2xdxmlK

Music: "Unbounded" by Orfan (https://twitter.com/grassfedbitcoin)
Outro Graphics: Phneep (http://www.phneep.com/)
Outro Art: Rock Barcellos (http://www.rockincomics.com.br/)