Step-By-Step Ethereum Smart Contract & Web3 Development

Set up your development environment for Ethereum smart contract work by installing Node.js, npm, VS Code, Ganache, Metamask, and Hardhat, then configure networks and import test accounts.

Install Node.js, npm, and Visual Studio Code to set up your Ethereum development environment, explore Ganache as an optional local blockchain and test with Hardhat and Metamask.

Install and configure Metamask, the web3 wallet for Ethereum and compatible chains, create a wallet, connect to mainnet and networks like Hardhat or Ganache, and manage private keys for testing.

Master Hardhat to build NFT smart contracts, configure the toolchain, optimize the Solidity compiler, and add networks for compiling, testing, and deploying on local or remote blockchains.

Learn to create a hardhat project to develop ethereum and evm contracts, set up the local hothead network, install essential packages, and organize contracts, scripts, and tests with mocha.

Download the NFT project source code from GitHub, clone or fetch the zip, and explore the finished project, the practice code with to-dos, and Solidity basics for smart contracts.

Extend the hardhat config by enabling the optimizer (200 runs), configure localhost and test networks, and add etherscan verification using dotenv-managed environment variables.

Configure a .env file with underscore-prefixed keys, copy metamask private keys, create alchemy, pinata, and etherscan keys, and prepare for local hardhat deployment to sepolia.

Explore solidity basics, including value types, reference types, functions, modifiers, events, and inheritance. See how these core features power an OpenZeppelin-based smart contract for building a web3 app.

Explore how smart contracts run on the blockchain, using Solidity, with value and reference types, data locations, events, modifiers, inheritance, libraries, interfaces, and abstract contracts.

Explore the basic layout of a solidity smart contract, including the spx license identifier, pragma solidity, imports from OpenZeppelin erc721, and contract inheritance, plus state variables, events, and constructors.

Explore Solidity value types, including int, uint, bool, address, enums, and fixed-size bytes, with default values and no nulls; learn visibility modifiers and payable addresses, and practice in Remix.

Explore reference types in solidity, including arrays, structs, mappings, strings, and bytes, and understand storage, memory, and call data, plus dynamic versus fixed-size arrays.

Explore Solidity error handling with require, revert, and assert, and learn about atomic transactions, input validation, gas considerations, and custom errors with Natspec comments.

Explain the difference between state-modifying and non-state-modifying functions, including gas fees and transaction requirements. Demonstrate how visibility modifiers and reusable modifiers control access and execution flow in Solidity.

Learn how events in Solidity expose data from state-changing functions via the transaction log, enabling external apps to subscribe. Emit with indexed arguments to create topics for efficient search.

Master solidity inheritance, including multiple inheritance, virtual and override keywords, and super or explicit contract calls. Prepare an NFT contract using the ERC-721 standard from OpenZeppelin.

Explore ERC721 NFTs using OpenZeppelin contracts to build an NFT smart contract from URI storage; compile with hardhat, deploy locally or on the Zeppelin test network, and publish to etherscan.

Explore how to mint non-fungible tokens to a specific recipient address using the ERC721 standard, linking metadata via a URL, and reusing OpenZeppelin's secure contract templates.

Explore OpenZeppelin's ERC721 contracts and the Uri storage extension, learn how to mint NFTs, review key methods and events, and navigate the OpenZeppelin API and GitHub for high-quality smart contracts.

Build an NFT smart contract with ERC721 URI storage, use the Counters library for token IDs, mint by the contract owner, and attach token URI metadata for each minted NFT.

learn to compile and deploy your smart contract locally using hardhat or ganache, create a contract factory, deploy the contract, and retrieve its address.

Deploy your smart contract to the Sepolia test network, pay gas in Sepolia ether, and verify it on ether scan via a Hardhat config using the Zeppelin network and Alchemy.

Verify and publish your solidity code to Etherscan on Sepolia using your API key and prepared config, then run Hardhat compile, node, deploy, and verify commands on scan.

Learn to build a web3 front end that communicates with a deployed smart contract using ethers.js. Mint NFTs, query owner, and transfer by token ID through real-world examples.

Explore a quick overview of ethers.js, including provider, signer, and contract classes, to call contract functions, listen to events, and utilize utilities for encoding, decoding, and big numbers.

Explore the ethers.js provider as the bridge between your frontend and the blockchain, enabling read-only access, local or remote networks, and key methods like getNetwork, getBalance, and getBlockNumber.

Explore the ethers.js signer, including json rpc signer and wallet signer, and how Hardhat auto-selects the right signer. Retrieve balances and addresses, and sign, send, and parse ether, awaiting receipts.

learn how to instantiate an ethers.js contract with address and signer or provider, listen for and filter transfer events, and query past logs using hardhat for an ERC-721 NFT.

Write an NFT minting script that mints tokens, displays the owner of a token id, and transfers a token to another signer across local and Zeppelin networks.

Develop robust smart contracts by testing with Hardhat, Mocha, and Chai, using network helpers to speed tests, and cover non-fungible token contract scenarios before mainnet deployment.

Hothead automatically creates a test folder, where you organize test files with describe and it blocks, using groups like my NFT contract and load fixtures to speed tests.

Explore how Hardhat network helpers and the load fixture restore contract state between tests, avoiding full redeploys by using a contract factory and fixtures.

Write and assert smart contract tests with Hardhat and Chai, using Hardhat matchers, token balance changes, reverts, and event emissions for ERC-721 tokens.

Build a web3 dapp with a React frontend that mints customized NFTs to a recipient, stores metadata on ipfs via pinata, and integrates metamask for secure transactions.

Bootstrap a simple React front end with Vite to interact with blockchain features, including Metamask, NFT metadata on IPFS via Pinata, and calls to a smart contract.

Explore basic structure of a React app for the nft mentor project, including node_modules, public, and src folders, and the App component with a count state using a React hook.

Merge the Hardhat and React projects into one by copying the NFT project's src and public folders, updating dependencies and scripts, and running npm install.

Learn how to communicate with MetaMask from a web3 app using the Ethereum object and JSON-RPC to enable accounts, send transactions, and listen for account changes.

Connect your dapp to metamask and authorize accounts for use with your web3 frontend by initializing a provider, signer, and contract instance with the contract address and abi.

Pin NFT metadata to IPFS using Pinata, ensuring data persistence, fast retrieval, and nearly unlimited storage, then obtain the IPFS hash URL for your dApp.

Create and pin custom nft metadata to ipfs via Pinata, then encode the function data and send a mint nft transaction to MetaMask.

Builds the NFT minting app user interface as a single component. Integrates blockchain helper functions, manages wallet state with useState and useEffect, and uses controlled inputs for image, name, description.

Test your app on a local Hardhat node, deploy the contract, mint NFT with name, description, and image URL via MetaMask, then verify the transaction on Sepolia.

Add your project to a local git repository, commit changes, and prepare to push to a remote GitHub repository by initializing git, creating a gitignore, and staging updates.

learn to push your local git project to GitHub by creating a repository, adding a remote origin, and pushing changes with git add, commit, and push to main.