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Web3 Session

Web3 Session

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Published
Author

1. Web2 Vs. Web3

Web2 Stuffs

backend: node.js, express
Db
auth
Cloud sevivce

Web3 Stuffs

smart contracts: solididty, vyper, rust
blockchain: ethereum, solanan
 

2. How Blockchain Works?

Hash Functions with Blockchain
all the Block of chain

Understanding Arbitrum’s architecture

Sequencer

 

Crypto Wallets

  1. Metamask
  1. Backpack

What is transaction

  1. Transactions are cryptographically signed instructions from accounts
  1. ac. initiates a transaction
 
Smart contract lang
solidity
js
rust
haskell
cairo
vyper
 

About solidity

oop, high-level lang
 

What is NFT?

are unique digital assets that represents ownership of a specific item or piece of content on hte blockchain
same as blockchain
minting means initiating NFT
opensea is largest NFT market
FanCraze
Deploy our own NFT contract and mint an NFT!
ABI (Application Binary Interface)
[ { "inputs": [], "stateMutability": "nonpayable", "type": "constructor" }, { "inputs": [ { "internalType": "address", "name": "sender", "type": "address" }, { "internalType": "uint256", "name": "tokenId", "type": "uint256" }, { "internalType": "address", "name": "owner", "type": "address" } ], "name": "ERC721IncorrectOwner", "type": "error" }, { "inputs": [ { "internalType": "address", "name": "operator", "type": "address" }, { "internalType": "uint256", "name": "tokenId", "type": "uint256" } ], "name": "ERC721InsufficientApproval", "type": "error" }, { "inputs": [ { "internalType": "address", "name": "approver", "type": "address" } ], "name": "ERC721InvalidApprover", "type": "error" }, { "inputs": [ { "internalType": "address", "name": "operator", "type": "address" } ], "name": "ERC721InvalidOperator", "type": "error" }, { "inputs": [ { "internalType": "address", "name": "owner", "type": "address" } ], "name": "ERC721InvalidOwner", "type": "error" }, { "inputs": [ { "internalType": "address", "name": "receiver", "type": "address" } ], "name": "ERC721InvalidReceiver", "type": "error" }, { "inputs": [ { "internalType": "address", "name": "sender", "type": "address" } ], "name": "ERC721InvalidSender", "type": "error" }, { "inputs": [ { "internalType": "uint256", "name": "tokenId", "type": "uint256" } ], "name": "ERC721NonexistentToken", "type": "error" }, { "inputs": [], "name": "ReentrancyGuardReentrantCall", "type": "error" }, { "anonymous": false, "inputs": [ { "indexed": true, "internalType": "address", "name": "owner", "type": "address" }, { "indexed": true, "internalType": "address", "name": "approved", "type": "address" }, { "indexed": true, "internalType": "uint256", "name": "tokenId", "type": "uint256" } ], "name": "Approval", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": true, "internalType": "address", "name": "owner", "type": "address" }, { "indexed": true, "internalType": "address", "name": "operator", "type": "address" }, { "indexed": false, "internalType": "bool", "name": "approved", "type": "bool" } ], "name": "ApprovalForAll", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": true, "internalType": "uint256", "name": "contentId", "type": "uint256" }, { "indexed": true, "internalType": "address", "name": "creator", "type": "address" }, { "indexed": false, "internalType": "string", "name": "contentURI", "type": "string" } ], "name": "ContentCreated", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": true, "internalType": "uint256", "name": "contentId", "type": "uint256" }, { "indexed": true, "internalType": "address", "name": "tipper", "type": "address" }, { "indexed": false, "internalType": "uint256", "name": "amount", "type": "uint256" } ], "name": "ContentTipped", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": true, "internalType": "address", "name": "creator", "type": "address" }, { "indexed": true, "internalType": "address", "name": "subscriber", "type": "address" } ], "name": "CreatorSubscribed", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": true, "internalType": "address", "name": "from", "type": "address" }, { "indexed": true, "internalType": "address", "name": "to", "type": "address" }, { "indexed": true, "internalType": "uint256", "name": "tokenId", "type": "uint256" } ], "name": "Transfer", "type": "event" }, { "inputs": [ { "internalType": "address", "name": "to", "type": "address" }, { "internalType": "uint256", "name": "tokenId", "type": "uint256" } ], "name": "approve", "outputs": [], "stateMutability": "nonpayable", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "owner", "type": "address" } ], "name": "balanceOf", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "stateMutability": "view", "type": "function" }, { "inputs": [], "name": "contentCount", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "stateMutability": "view", "type": "function" }, { "inputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "name": "contents", "outputs": [ { "internalType": "address payable", "name": "creator", "type": "address" }, { "internalType": "string", "name": "contentURI", "type": "string" }, { "internalType": "uint256", "name": "tipAmount", "type": "uint256" } ], "stateMutability": "view", "type": "function" }, { "inputs": [ { "internalType": "string", "name": "_contentURI", "type": "string" } ], "name": "createContent", "outputs": [], "stateMutability": "nonpayable", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "", "type": "address" } ], "name": "creators", "outputs": [ { "internalType": "uint256", "name": "subscriberCount", "type": "uint256" }, { "internalType": "uint256", "name": "subscriptionFee", "type": "uint256" } ], "stateMutability": "view", "type": "function" }, { "inputs": [ { "internalType": "uint256", "name": "tokenId", "type": "uint256" } ], "name": "getApproved", "outputs": [ { "internalType": "address", "name": "", "type": "address" } ], "stateMutability": "view", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "_creator", "type": "address" } ], "name": "getSubscriberCount", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "stateMutability": "view", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "owner", "type": "address" }, { "internalType": "address", "name": "operator", "type": "address" } ], "name": "isApprovedForAll", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "stateMutability": "view", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "_subscriber", "type": "address" }, { "internalType": "address", "name": "_creator", "type": "address" } ], "name": "isSubscribed", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "stateMutability": "view", "type": "function" }, { "inputs": [], "name": "name", "outputs": [ { "internalType": "string", "name": "", "type": "string" } ], "stateMutability": "view", "type": "function" }, { "inputs": [ { "internalType": "uint256", "name": "tokenId", "type": "uint256" } ], "name": "ownerOf", "outputs": [ { "internalType": "address", "name": "", "type": "address" } ], "stateMutability": "view", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "from", "type": "address" }, { "internalType": "address", "name": "to", "type": "address" }, { "internalType": "uint256", "name": "tokenId", "type": "uint256" } ], "name": "safeTransferFrom", "outputs": [], "stateMutability": "nonpayable", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "from", "type": "address" }, { "internalType": "address", "name": "to", "type": "address" }, { "internalType": "uint256", "name": "tokenId", "type": "uint256" }, { "internalType": "bytes", "name": "data", "type": "bytes" } ], "name": "safeTransferFrom", "outputs": [], "stateMutability": "nonpayable", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "operator", "type": "address" }, { "internalType": "bool", "name": "approved", "type": "bool" } ], "name": "setApprovalForAll", "outputs": [], "stateMutability": "nonpayable", "type": "function" }, { "inputs": [ { "internalType": "uint256", "name": "_fee", "type": "uint256" } ], "name": "setSubscriptionFee", "outputs": [], "stateMutability": "nonpayable", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "_creator", "type": "address" } ], "name": "subscribe", "outputs": [], "stateMutability": "payable", "type": "function" }, { "inputs": [ { "internalType": "bytes4", "name": "interfaceId", "type": "bytes4" } ], "name": "supportsInterface", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "stateMutability": "view", "type": "function" }, { "inputs": [], "name": "symbol", "outputs": [ { "internalType": "string", "name": "", "type": "string" } ], "stateMutability": "view", "type": "function" }, { "inputs": [ { "internalType": "uint256", "name": "_contentId", "type": "uint256" } ], "name": "tipContent", "outputs": [], "stateMutability": "payable", "type": "function" }, { "inputs": [ { "internalType": "uint256", "name": "tokenId", "type": "uint256" } ], "name": "tokenURI", "outputs": [ { "internalType": "string", "name": "", "type": "string" } ], "stateMutability": "view", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "from", "type": "address" }, { "internalType": "address", "name": "to", "type": "address" }, { "internalType": "uint256", "name": "tokenId", "type": "uint256" } ], "name": "transferFrom", "outputs": [], "stateMutability": "nonpayable", "type": "function" }, { "inputs": [ { "internalType": "uint256", "name": "_contentId", "type": "uint256" } ], "name": "withdrawTips", "outputs": [], "stateMutability": "nonpayable", "type": "function" } ]
Byte Code
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