Blockchain Internals: From Theory to Python
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This talk analyzes the core technology of a blockchain and recreates a simple POC in Python. Starting from Bitcoin Blockchain, some books, and some open source cryptocurrency POC, the talk will consider three main aspects of the blockchain technology implementing them in Python: - Structure: blockchain as a data structure (with demo) - Logic: meaning and limitations of blockchain scripting and smart contract (with demo) - Network: blockchain as a distributed system and C.A.P. theorem (with demo)
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Blockchain Internals: From Theory to Python
- 1. BLOCKCHAIN INTERNALS: FromTheory to Python NicolaCostantino
- 2. 92 minutes of Storytelling… Not really.
- 4. Mastering Bitcoin Andreas M. Antonopulos
- 5. “Let’s build a Blockchain” https://github.com/Haseeb-Qureshi/lets-build-a- blockchain
- 6. “Learn Blockchains by Building One” https://hackernoon.com/learn-blockchains-by-building- one-117428612f46
- 7. Studying blockchain as a technology • To use blockchain as a technology we need to: • extract it from the original (economic/financial) domain • analyze its strengths and weaknesses • adapt it to other compatible domains • We need to fully understand blockchain as technology for making the most out of it in the original domain • Blockchain technology is the core of… every blockchain!We need to study it to be confident with the use and the development of blockchain-related applications.
- 8. Bitcoin & Blockchain Finance & Computer Science Source: https://bitcoin.org/bitcoin.pdf
- 9. “ ” Blockchain is a data structure; it is basically a linked list that uses hash pointers instead of normal pointers. Hash pointers are used to point to the previous block. (Mastering Blockchain) BLOCKCHAIN as DATA STRUCTURE
- 10. The Plan Structure Logic Network
- 12. Structure - Questions • How is a blockchain structured internally? • What could we store inside a blockchain? • What are blockchain’s strengths and weaknesses?
- 13. Structure - Demo Blockchain as Data Structure – Analysis Code @ https://github.com/NicolaCostantino/Blockchain-Internals
- 14. EXPECTATION Blockchain as Data Structure
- 15. REALITY Blockchain as Data Structure
- 16. NETFLIX ADAPTATION Blockchain as Data Structure
- 17. “Blockchain is a database…” No.
- 18. Database: • “A large amount of information stored in a computer system in such a way that it can be easily looked at or changed” Source (Cambridge Dictionary): https://dictionary.cambridge.org/dictionary/english/database Blockchain: • it can NOT be easily looked at or changed
- 19. Blockchain as data structure is the representation of… (lack of) TRUST! Trust me. I trust you because/if/when I can check at any time if I can trust you
- 20. LOGIC Script and Smart Contract
- 21. Ricardian Contract "A Ricardian contract can be defined as a single document that is • a contract offered by an issuer to holders • for a valuable right held by holders, and managed by the issuer • easily readable (like a contract on paper) • readable by programs (parsable like a database) • digitally signed • carrying the keys and server information • allied with a unique and secure identifier.“ SourceWikipedia: https://en.wikipedia.org/wiki/Ricardian_contract
- 22. Logic - Demo Script and Smart Contract Code @ https://github.com/NicolaCostantino/Blockchain-Internals
- 23. NETWORK Distributed Systems DLT: Distributed LedgerTechnology
- 24. It is impossible for a distributed data store to simultaneously provide more than two out of the following three guarantees: • Consistency: Every read receives the most recent write or an error • Availability: Every request receives a (non-error) response – without the guarantee that it contains the most recent write • Partition tolerance: The system continues to operate despite an arbitrary number of messages being dropped (or delayed) by the network between nodes C.A.P. (Brewer's) Theorem
- 25. Network - Demo Distributed Systems DLT: Distributed LedgerTechnology Code @ https://github.com/NicolaCostantino/Blockchain-Internals
- 26. Nicola Costantino (Genius, Playboy, Billionaire, Philanthropist) nicolacostantino.com nicolacostantino.dev https://github.com/NicolaCostantino https://www.linkedin.com/in/nicolacostantino/ https://twitter.com/theroadtodark ThankYou!