23 intermediate resources to learn Web3
23 resources
ERC-20 Token Standard
ethereum.org · Intermediate · Articles
The ERC-20 token interface function by function: balances, transfers and approvals.
Solidity Documentation
soliditylang.org · Intermediate · Articles
The language reference: syntax, types, contract structure and compiler behavior.
OpenZeppelin Contracts
OpenZeppelin · Intermediate · Articles
Docs for OpenZeppelin Contracts, the audited Solidity library of ERC-20, ERC-721, access-control and upgradeable building blocks that teams reuse instead of rewriting.
Ethernaut
OpenZeppelin · Intermediate · Challenges
OpenZeppelin's wargame: each level is a deliberately vulnerable contract you exploit, which teaches how attacks such as re-entrancy work.
Smart Contract Best Practices
Consensys · Intermediate · Articles
Consensys Diligence's guide to common smart-contract attacks, such as re-entrancy and front-running, and the coding patterns that prevent them. No longer actively maintained.
The Ultimate Solidity Course
RareSkills · Intermediate · Courses
A free Solidity course for people who already program: storage, ERC-20 and ERC-721, re-entrancy, proxies, gas optimization and walkthroughs of Uniswap V2 and Compound V3.
Hardhat Documentation
Hardhat · Intermediate · Articles
How to set up Hardhat, then write tests, debug and deploy Solidity contracts; tests can be in TypeScript or Solidity.
The Foundry Book
Foundry · Intermediate · Books
The Foundry manual: Forge to build and test contracts in Solidity, Cast to call chains from the terminal and Anvil to run a local node.
Anchor Framework Docs
Anchor · Intermediate · Articles
Docs for Anchor, the Rust framework for writing Solana programs, which handles account validation and generates the IDL that clients use.
Solana Foundation on GitHub
GitHub · Intermediate · Open source
The Solana Foundation's public repositories, a place to read Rust code and open a first pull request.
Bitcoin Developer Guide
developer.bitcoin.org · Intermediate · Articles
Developer documentation on how Bitcoin works: blocks, transactions, Script, the peer-to-peer network, mining and wallets.
Chainlink Documentation
Chainlink · Intermediate · Articles
Docs for Chainlink, the oracle network that brings price feeds and other off-chain data to smart contracts, with integration guides in Solidity.
Polygon Developer Docs
Polygon · Intermediate · Articles
Polygon's developer docs: the Polygon PoS chain, the Chain Development Kit (CDK) for launching a chain, and the Agglayer that connects chains.
Tezos Documentation
Tezos · Intermediate · Articles
How Tezos works, including governance by token holders, and how to write and deploy smart contracts in languages such as SmartPy and LIGO.
web3.py Documentation
web3.py · Intermediate · Articles
Reference for web3.py, the Python library for reading from Ethereum, sending transactions and calling contracts.
Discord Developer Documentation
Discord · Intermediate · Articles
Discord's docs for building bots and apps: slash commands, roles, permissions and webhooks.
OpenAI Platform Documentation
OpenAI · Intermediate · Articles
OpenAI's API documentation: calling GPT models, prompting, function calling and building chat features.
Machine Learning Specialization
Coursera · Intermediate · Courses
Andrew Ng's Machine Learning Specialization: regression, classification, neural networks and decision trees, taught in Python.
a16z crypto
a16z crypto · Intermediate · Articles
Essays, research and reports from a16z's crypto team on protocols, markets and policy.
Finematics (YouTube)
Finematics · Intermediate · Videos
A YouTube channel that explains DeFi protocols, such as lending and liquidity pools, with diagrams.
OpenZeppelin on GitHub
GitHub · Intermediate · Open source
OpenZeppelin's public repositories, including the audited Contracts library, where you can read the code and open issues.
Ethereum on GitHub
GitHub · Intermediate · Open source
The ethereum organization on GitHub: the Solidity compiler, go-ethereum, the EIP and ERC proposals and the protocol specifications.