Getting Started with Web3 Development

Explain why information replication makes value non-unique, unlike money that cannot be spent twice. Show how digital ledgers track transactions to prevent double spending and connect banks across networks.

Explore the blockchain design goals of data distribution, decentralization, and immutability, and how consensus algorithms enable trustless, peer-to-peer networks with pseudonymity and transparent ledgers.

Explore blockchain architecture as a secure fusion of database and network, anchored by a peer-to-peer node network and a verifiable distributed ledger.

Explain how a cryptocurrency incentivizes miners in a network, rewards blocks, and supports gas and smart contracts in Ethereum, while Bitcoin relies on properties: durable, portable, acceptable, limited, divisible, fungible.

Explore hashing functions and their cryptographic properties, and learn how they secure blockchain data by chaining blocks and enabling proof-of-work via nonces and difficulty targets.

Explain asymmetric cryptography with private and public keys, digital signatures, and blockchain use, including elliptic curve cryptography, wallet addresses, and hashes of public keys.

Set up a private Ethereum node on macOS using geth and puppeth, initialize a genesis block, create accounts, and mine with RPC access and IPC for local development.

Describe how smart contracts run on the EVM, compile with solidity to bytecode, and interact via web3.js to deploy a greetings contract with set and get functions.

Explore how gas sets the cost of Ethereum transactions, linking gas units to ether payments and miner rewards, and distinguish between view reads and state changing calls.

Learn how to send ether between accounts using truffle and web3.js, including gas, gas price, and transaction fees on a local blockchain.

Build a decentralized application called Chain List on the Ethereum blockchain, using Metamask to buy and sell articles, track events, and update the article list in real time.

Deploy and interact with a smart contract using Ganache and Truffle, migrate contracts, and test the sell article function with ether values and gas considerations.

Learn to sell an article using metamask on a local Ganesh network, switch accounts, deploy with truffle, and handle network id issues while refreshing the frontend to show the article.

Add a sale event to the smart contract and learn to trigger and watch it from a truffle console, so watchers see new articles for sale in real time.

Sell an article via a smart contract function, read the log sell article event from the transaction receipt, and verify seller, article name, and price in ether.

Sell an article with a smart contract event, redeploy to reset state, and watch only the latest events for reliable frontend updates.

Watch on-chain events from the frontend by listening for the sell article event, display the article from the contract, and refresh the interface with a live event list.

Learn to deploy contracts on a private node by unlocking accounts, selecting the deployment from a specific account, and re-running migrations with Truffle and RPC unlocks.

Add a payable buy feature to chain list smart contract, ensuring article exists and is available, recording the buyer and transferring ether to the seller, with a purchase event.

Create a get article function in a smart contract to return seller, buyer, name, description, and price; deploy, sell, and buy an article on ganache with event logs.

Update the frontend to reload articles, extract price in ether, and display buyer status with a buy button that hides when the seller is connected or sold.

Learn to extend the smart contract to support multiple articles by adding an id based buy function, validating article existence, preventing self-purchases, transferring funds, and updating events.

Interact with the deployed smart contract to list, sell, and buy multiple articles, using mappings, arrays, and structs, and verify balances and article details through the contract's getters and events.

Delves into running web3 tests, debugging happy-path flows for selling and buying articles, and testing exceptions when articles are absent or do not exist, with ether pricing and balances.

Render articles into the template, populate id, seller, name, description, and price, use the articles row, convert to wei, and toggle the buy button based on seller connection.

Learn why and how to deactivate a smart contract with self-destruct, enforce owner-only access, and manage migration, refunds, and user notifications on main net.

Refactor a smart contract to use inheritance by creating a base contract with an owner and an only owner modifier. Extend the contract to centralize authorization and reuse logic.

Deploy the chain list dapp frontend to GitHub pages, configure test and production network deployments, and enable user interactions via Metamask on a live front end.

Learn to deploy smart contracts on the Rinkeby test network by configuring a local node, unlocking accounts, funding via faucet, and migrating with Truffle.

Deploy smart contracts to the main net using geth and truffle migrate, then publish the front end on GitHub Pages and monitor ether, gas, and costs.

Restore a previous smart contract project, install dependencies, and update truffle config for ganesh and solidity 0.5. Learn payable addresses, memory data, address(0), emit, constructors, and require messages, then compile.

You've reached the end of this getting started with web3 development course, gaining a clear view of the ecosystem, the development environment, and how to start building decentralized apps.

Explains the Byzantium hard fork on Ethereum, including new EVM opcodes and four native contracts. Highlights implications for mining rewards, difficulty, and parallel transaction processing that improve efficiency.