Source library
Continue with the primary material.
CourseChain pages are starting points. Use official protocol documentation, public agencies, and established security resources to verify and deepen your understanding.
Bitcoin
Protocol foundations.
The original description of a peer-to-peer electronic cash system. Useful historical and conceptual context; modern implementations contain later changes.
Open source ↗Technical explanations of the blockchain, transactions, wallets, payment processing, and network behavior.
Open source ↗Smart-contract networks
Ethereum and Solana documentation.
Official introduction to contract code, state, transactions, deployment, composability, and limitations.
Open source ↗Broader documentation covering accounts, transactions, execution, clients, standards, development tools, and scaling.
Open source ↗Official documentation for accounts, programs, instructions, transactions, program-derived addresses, and fees.
Open source ↗Security and scams
Public guidance and secure development.
US consumer guidance on investment scams, impersonation, payment demands, and warning signs involving cryptocurrency.
Open source ↗Community security resources for common smart-contract weaknesses, review practices, and safer development.
Open source ↗Advertising and privacy
Google publisher documentation.
Rules covering prohibited content, privacy disclosures, personalized advertising, identifiers, and publisher behavior.
Open source ↗Google’s description of advertising-cookie use and publisher privacy-policy disclosure requirements.
Open source ↗Google guidance for configuring consent choices in regions where advertising consent requirements apply.
Open source ↗Documentation can be revised, moved, or superseded. Check publication dates, version context, and official announcements before relying on a technical or policy detail.