Dapps for Web Developers Aberdeen Techmeetup
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This document provides an overview of building decentralized applications (Dapps) on Ethereum. It discusses the history of cryptocurrency and blockchain technology, key concepts like mining, proof of work, and smart contracts. It also outlines the tools and technologies needed to develop Dapps, including installing Ethereum, using languages like Solidity, and examples of simple Dapps built with HTML and JavaScript. The goal is to educate web developers on creating Dapps that leverage blockchain and smart contracts.
Dapps for Web Developers Aberdeen Techmeetup
- 1. Dapps Web Developers Guide to building a Dapp
- 2. Agenda ● History & terminology ● Ethereum ● HTML JS Dapp examples ● Summary
- 3. History ● History Mathematics & Money ● Encryption Public Private Key 1970's ● 90's gold, centralized 2 tonnes - put in prison ● 2008 https://bitcoin.org/bitcoin.pdf Satoshi Nakamoto Decentralized peer to peer money ● Price, Altcoins, Payments, Int. Transfers, etc ● Smart Contracts
- 4. Terminology ● Blockchain ● Mining ● Proof of Work ● Merkle Trees & HASHing ● Consensus ● Rewards (bitcoins) ● Peer to Peer, no central authority, secure
- 5. Public Key Encryption ● Public Keys & large numbers https://www.youtube.com/watch?v=ZloHVKk7DHk ● ● Elliptic Curves https://www.youtube.com/watch? v=iB3HcPgm_FI
- 7. Proof of Work ● SPAM - hashcash ● https://www.youtube.com/watch?v=q6MGcE68-8g ● Cost high at volume HASHING number of Zeros 00000023
- 8. Merkle Tree
- 9. Consensus ● BLOCK ● TO BLOCKCHAIN ● Longest chain wins ● 51% attack CPU of network ● Maths problem varies difficulty automatically ● 10min on average to solve ● Reward reduce by half every 4 years
- 11. Ethereum ● Smart Contracts ● EVM ethereum Blockchain ● Solidity Language ● IPO ● Ether gas pay for compute on EVM ● Whisper & Swarm test release ● Others exist (Maidsafe, Blockstream, creddits etc etc.)
- 12. Install ● Caustion still under test development ● https://github.com/ethereum/cpp-ethereum/wiki ● Ubunut 14.04 ● GO, CPP, Python, Node.js ● Other Mac, Windows
- 13. Dapp ● Learn concepts - Alethzero ● HTML Javascript API – Send ether – Simple smart contract – Own Bank
- 14. Summary ● Websites ● Apps ● Dapps ● Thank you for listening ● Q&A