ETH

Ethereum is like Bitcoin but with turing complete smart contracts

ECR-20 token

tokens only exist inside a contract

0eth to transfer token + gas fee

ecr-20 complaint - fungible (same value for each token, like money)

totalSupply, balanceOf, transfer, transferFrom, approve, and allowance. In addition, you can specify optional functions, such as name, symbol, and decimal

liquidity pool - unisawp - x * y = k (k constant, total liquidity)

eth ↔ erc-20 token

erc-20 ↔ erc-20 token

ERC-721 non fungible token - each token has a different value - property

erc-721 + erc-165 interface

erc - ethereum request for comment

proof of work - more energy wins

proof of stake - you stake (put some eth money), you someone is randomly assign to validate the block, if you cheat you loose your stack

Practical

• https://cyprianaarons.hashnode.dev/how-to-create-an-nft-on-ethereum-blockchain-ckp8r1wzy077104s184ungppu

• https://dev.to/dabit3/the-complete-guide-to-full-stack-ethereum-development-3j13

—

nft opensea

rinkeby

address test https://twitter.com/sseraphini/status/1434625022845403141

https://rinkeby.etherscan.io/tx/0xd6dd93fb90eedf953d2b11a93b4c42a3917739d34bb27d9e8f0ca8124129a31c