Web3 projects: wallets, networks, DeFi and tools

Understand the features, use cases, practical steps and risks of Web3 wallets, networks, DeFi protocols and developer tools.

How does Jupiter route a Solana swap? How routing picks a path, what Ultra and Manual modes each give you, and what to check before confirming.

What is Optimism, one network or many? What OP Mainnet, OP Stack and the Superchain each mean, and why withdrawals take about seven days.

What is Arbitrum One and how do you bridge to it? How One and Nova differ, chain ID 42161, and why official withdrawals take about seven days.

How does a Safe multisig actually work? What M-of-N approval means, how Safe relates to its signer wallets, and the setup choices you cannot undo.

Which chains does Phantom actually support? Its current network scope, what self-custody means in practice, and which EVM networks are missing.

Is Rabby Wallet worth switching to? How far its pre-signing checks go, how it differs from MetaMask in daily use, and what to do before migrating.

What is GitHub and how do you judge a repo? What issues, pull requests and Actions do, plus the signals that show a project is still maintained.

What is Cloudflare Pages and when does it fit? Git deploys versus direct uploads, what Pages Functions can do, and where the free tier ends.

What is Vercel and what does it cost? The path from Git repo to live site, what preview deployments solve, and where the free tier ends.

What is Next.js and should you learn it? How file routing works, server rendering versus static generation, and a sensible order to learn it in.

What is Ethereum.org and where should you start? Which sections to read first, and how the official docs differ from third-party tutorials.

What is Uniswap and how do you swap safely? How an AMM prices a trade, what liquidity pools do, and which lines of the approval prompt matter.