Web3 Developer Crash Course

Master the core Web3 stack in one session. Learn to build, test, and deploy a custom NFT collection using Hardhat, Solidity, and Ethers.js.

#1about 7 minutes

Understanding the core components of a blockchain transaction

A transaction's key fields like hash, status, gas price, and value are explained as the fundamental building blocks of the blockchain.

#2about 7 minutes

Exploring the basics of smart contracts and Solidity

Smart contracts are defined as immutable code on the blockchain, with a line-by-line breakdown of a basic Solidity contract's syntax and structure.

#3about 2 minutes

Following the lifecycle of a smart contract deployment

The process of developing a smart contract involves writing Solidity code, compiling it to bytecode, and sending it to the blockchain via a signed transaction.

#4about 2 minutes

Breaking down the architecture of a decentralized application

A dApp typically consists of an on-chain smart contract for logic and an off-chain front-end for user interaction, sometimes supplemented by a traditional back-end.

#5about 3 minutes

Differentiating between fungible and non-fungible tokens

Token standards like ERC-20 for fungible assets, ERC-721 for unique non-fungible tokens (NFTs), and ERC-1155 for semi-fungible assets are explained.

#6about 6 minutes

Setting up a development environment with Hardhat

A step-by-step guide shows how to initialize a new smart contract project using the Hardhat framework and explains its default folder structure.

#7about 11 minutes

Analyzing the structure of an ERC-721 NFT contract

A practical ERC-721 contract is examined, highlighting the use of OpenZeppelin libraries for security and standard functionality like ownership control.

#8about 6 minutes

Implementing core functions for an NFT minting contract

Key functions like `mint`, `withdraw`, and `tokenURI` are detailed, covering concepts such as `payable` functions, visibility modifiers, and transaction reverts.

#9about 5 minutes

Minting an NFT through a front-end application

A live demonstration shows how to mint an NFT by interacting with a deployed smart contract via a front-end, confirming the transaction with MetaMask.

#10about 7 minutes

Answering common questions about web3 development

The discussion covers beginner resources, real-world blockchain use cases like supply chain, the importance of security, and future trends such as ZK proofs.