Web3 Resources

Chains

• Ethereum
• Polygon
• Solana
• Cardano
• xDai - A layer 2 chain used for POAPs and more

Block Explorers

• Etherscan - Ethereum block explorer
• Polygonscan - Polygon (MATIC) block explorer
• Blockscan - Multi-chain block explorer, by the creators of Etherscan

Buying / Selling

• Coinbase - Probably the most commonly used site for buying and selling cryptocurrencies
• Changelly - A fast site for buying cryptocurrencies
• Moonpay - A fast site for buying cryptocurrencies
• Ramp - A quick and easy to use payment gateway for cryptocurrencies

Security

• CryptoScamDB - A list of known cryptocurrency scams and phishing attempts

Development

• Solidity - The main contract programming language for EVM-compatible chains
• Solidity Docs - Documentation for the Solidity programming language
• Solidity Cheat Sheet - A simplified official cheatsheet for Solidity
• Solidity Source Code - The source code of Solidity on GitHub
• IntelliJ Solidity Plugin - Solidity language support in JetBrains applications
• VS Solidity Plugin - Solidity language support in Visual Studio Code
• Hardhat Development Environment - A full development suite for Solidity and EVM, containing debug tools and local Solidity.
• Slither - Static analysis for Solidity contracts
• Solhint - Security and style guide linter for Solidity

Hosted APIs

• Alchemy - A hosted API SaaS for EVM chains
• Infura - A hosted set of ETH, ETH2, and IPFS API nodes
• Chainstack - A hosted API SaaS for blockchain nodes
• Moralis - Web3, REST, and fast node APIs for blockchain development

EVM API Documentation

• JSON-API Documentation on Alchemy
• JSON-API Documentation on Infura

Utilities

• Chainlist - An EVM swap site for accessing multiple chains
• GasNow - Check the current and upcoming gas for transactions on Ethereum
• Token Approval Checker (ETH) - Review and revoke token approvals for any dApps
• Frame - A privacy-focused cross-platform wallet

Tutorials

• CryptoZombies - Learn to code blockchain (Solidity) dApps with gamification
• Chainshot - Learn to build blockchain related technology
• Capture The Ether - A Solidity contract based game to learn about blockchain security
• _buildspace - Learn to create blockchain technology such as Web3 apps and ERC-721 NFTs
• NFT School - An open source collection of tutorials and guides for NFT development
• Solidity By Example - A collection of Solidity examples to learn from
• Web3 University - A collection of guides to blockchain development, a partnership between multiple Web3 communities
• dApp University - A collection of YouTube videos revolving around Ethereum and Web3
• Girl Gone Crypto - A collection of YouTube videos on Web3 and cryptocurrencies

Domains

• ENS - The original Ethereum Name Service, a decentralised .eth domain for wallets, addresses, and more
• Unstoppable Domains - Supports multiple TLDs, such as .crypto, .wallet, or .x
• Bonfida Naming - Domain names for the Solana chain (supports .sol or Twitter handles)

Hardware Wallets

• Ledger (Referral Programme - 20% discount)
• Trezor
• GridPlus (Referral Programme)

Events

• POAPs - Digital Proof of Attendance, minted on the xDai chain

IPFS / Storage

• IPFS - The official decentralised storage solution for a distributed web
• ipfs-mini - A tiny npm package for querying IPFS from the browser
• Pinata - Hosted IPFS storage and IPFS pinning
• NFT Storage - Hosted NFT storage via IPFS

Newsletters

• The Defiant