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Ethereum for node.js devs Introduction to Ethereum platform by Raul Pino NodeConf Argentina 2016 1

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Who am I? » Born in Venezuela » Living in Chile » uBiome » Groupon Latam » Like Distributed Systems » <3 asado, sorrentinos, choripanes, chimichurri 2

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What is Ethereum? Ethereum FAQ - What is ...? 3

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What is Ethereum? » Is it Oblivion? 4

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What is Ethereum? » Is it Oblivion? » No. “Ethereum is a computer.” Dr. Gavin Wood (DevCon1 2015) » Gigawhat? (˽°□°҂˽Ɨ ˍʓˍ 5

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What is Ethereum? “Is a public blockchain-based distributed computing platform, featuring smart contract functionality.” (Wikipedia) 6

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What is Ethereum? “It provides a decentralized virtual machine, the Ethereum Virtual Machine (EVM), that can execute peer-to-peer contracts using a cryptocurrency called ether.” (Wikipedia) 7

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Ethereum concepts: » Ether » Blockchain » Smart Contract » Ethereum Virtual Machine » Decentralized Application (dApp) 8

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Ether Is the cryptocurrency itself. It is a form of payment made by the clients of the platform to the machines executing the requested operations. Related to Gas, cost of transactions over network. 9

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Blockchain Is a distributed database. Each record is a block. Each block have a timestamp and a link to a previous block. Entire history of all transactions on the network. 10

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Smart Contract Is kind of the protocol implemented in the network by a dApp. There are some languages used, but the most popular is Solidity. 11

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Ethereum Virtual Machine It refers to the blockchain, the miners/clients. "The computer" that executes smart contracts. Backend of dApps. 12

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Decentralized Application (dApp) UI to decentralized backend (smart contracts and blockchain, EVM). Old EthAcademy - https:// dappsforbeginners.wordpress.c om/ Truffle *** - http:// truffleframework.com/ 13

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Live coding: mode on! Brace yourself a demo is coming! :O 14

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So again what is Ethereum? “Ethereum is a computer.” Dr. Gavin Wood (DevCon1 2015) 15

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Ethereum --properties According to Dr. Wood: » Slow: Code runs 5-100x slower that natively compiled. » Expensive to use: Basic computation, memory and storage costs are ~1950s leves. » Not always immediately decisive: Actions of last 60s may be reorganised. 16

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Ethereum ++properties According to Dr. Wood: » Truly global singleton: One computer for the entire planet now and forever. » Ubiquitous: Wherever there's internet, there's Ethereum. » Cannot fail, be stopped, be censored: No authority, resistant to attack. 17

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So Ethereum is like ...Matambre! A blockchain of meat, where is surrounded by peers, which uses a social contract, to get a consensus how to consume it, to... "Kill hunger" for decentralization. 18

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What is Ethereum? Ethereum for Dummies - (DEVCON1) 19

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Takeaways Ultimate goal: “A decentralized web would give power back to the people online” Matthew Hodgson (matrix.org in TC) 20

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Takeaways “Threats to the Internet, such as companies or governments that interfere with or snoop on Internet traffic, compromise basic human network rights.” Tim Berners-Lee 21

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Interesting links and resources: State of the dApps Ethereum for Dummies - (DEVCON1) Ethereum FAQ ConsenSys/Ethereum-Development-Best-Practices Ethereum 101 Truffle MetaCoin Example 22