Building a Blockchain in JavaScript - Nakov - at Beer.js - August 2018
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The document outlines a presentation by Svetlin Nakov on building a blockchain network in JavaScript, covering topics such as blockchain architecture, components, and peer-to-peer synchronization. It provides a minimalistic overview of blockchain technology, explaining its decentralized and secure nature, as well as detailing the structure of blocks and the roles of nodes, wallets, and miners. The document includes links to a demo project and resources for further exploration.
![Aug 2, 2018
Building the Blockchain Node
Node
NodeId: unique_string
SelfUrl: URL
Peers: map(nodeId
URL)
Chain: Blockchain
REST Endpoints
Blockchain
Blocks: Block[]
PendingTransactions: Transaction[]
CurrentDifficulty: integer
MiningJobs: map(
blockDataHash Block)](https://image.slidesharecdn.com/building-a-blockchain-in-js-nakov-at-beerjs-august-2018-180927102315/85/Building-a-Blockchain-in-JavaScript-Nakov-at-Beer-js-August-2018-9-320.jpg)
Building a Blockchain in JavaScript - Nakov - at Beer.js - August 2018
- 1. Aug 2, 2018 let title = “Building a Blockchain Network in JS”; let info = { speaker: “Svetlin Nakov”, position: “Co-founder @ SoftUni, blockchain technical trainer”, author-url: “http://nakov.com”, demo-project-url: “https://github.com/nakov/NakovChain” };
- 2. Aug 2, 2018 About Svetlin Nakov • Software engineer, trainer, PhD, entrepreneur, author of 12 books, blockchain expert • 3 successful tech educational initiatives:
- 3. Aug 2, 2018 agenda(); • Blockchain Networks o Minimalistic Overview • Building a Simple Proof-of-Work Blockchain in JS o Architecture and Components o Blockchain Node, Wallet, Miner o Peer-to-Peer Chain Synchronization Svetlin Nakov Building a Blockchain Network in JS
- 4. Aug 2, 2018 Blockchain Networks Minimalistic Overview
- 5. Aug 2, 2018 What is Blockchain? Distributed ledger Peer-to-Peer network Nodes hold ledger of facts + history of updates Decentralized (no owner) Secure Transactions are verified by the entire network Immutable
- 6. Aug 2, 2018 Blockchain == Chain of Data Blocks timestamp block_hash all_transactions_hash transaction #1 hash transaction #2 hash transaction #3 hash … Block #0 (genesis block) prev_hash nonce timestamp block_hash all_transactions_hash transaction #1 hash transaction #2 hash transaction #3 hash … Block #1 nonceprev_hash timestamp block_hash all_transactions_hash transaction #1 hash transaction #2 hash transaction #3 hash … Block #3 prev_hash nonce Demo: https://etherscan.io
- 7. Aug 2, 2018 Building a Simple Blockchain Network in JS Architecture, Components, Blockchain Node, Wallet, Miner P2P Chain Synchronization
- 8. Aug 2, 2018 Blockchain System Architecture Node Chain Blocks Transactions Balances Mining jobs Peers and sync Wallet Keep private keys Check balances Send transactions Miner Get mining block Mine (PoW) Submit result Block Explorer View blocks View confirmed transactions View pending transactions View accounts and balances View peers map Faucet Request coins
- 9. Aug 2, 2018 Building the Blockchain Node Node NodeId: unique_string SelfUrl: URL Peers: map(nodeId URL) Chain: Blockchain REST Endpoints Blockchain Blocks: Block[] PendingTransactions: Transaction[] CurrentDifficulty: integer MiningJobs: map( blockDataHash Block)
- 10. Aug 2, 2018 The Wallet
- 11. Aug 2, 2018 The Miner Block Candidate BlockDataHash: hex_number Nonce: number DateCreated: timestamp BlockHash: hex_number SHA256 Node Increment the Nonce 00099e325df2a8…1b51
- 12. Aug 2, 2018 Peers and Synchronization
- 13. Aug 2, 2018 Blockchain Network: REST API Demo: https://stormy-everglades-34766.herokuapp.com
- 14. Aug 2, 2018 Thanks to our Sponsors