Blockchain magic from the browser with web3

on YouTube ↗25m

" summary

Explains how to run and call Ethereum smart contracts from the browser using web3.js and injected providers like MetaMask via the Remix IDE demo: a simple HelloWorld contract is compiled, deployed to a testnet, read instantly and updated with a paid transaction (gas required). Covers ERC-721 nonfungible tokens (CryptoKitties sold rare gen‑0 kitties for roughly a million), notes blockchain is consensus layer, very slow and expensive today (orders of magnitude slower), and when to keep logic off‑chain.

AI-written summary · about

" chapters (8)

1. 0:00Start
2. 0:57The context
3. 3:18The solution: Blockchain
4. 4:27Native Currency
5. 6:31Smart contracts
6. 9:29Just the consensus layer
7. 14:13Browser magic
8. 23:07Explore further

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