What is chfd?

This repository is a study guide for people preparing to become Certified Hyperledger Fabric Developers (CHFD). Hyperledger Fabric is a blockchain platform used by enterprises to build secure, shared databases and transaction systems. The certification tests whether someone can actually build applications on top of this technology, and this repo organizes the core skills you need to pass that exam. The repo breaks down the certification into six main areas. About 40% of the exam focuses on writing smart contracts, the self-executing programs that define business rules on the blockchain. Another 25% covers how to actually call those smart contracts from applications and listen for events when transactions happen. The rest covers supporting skills like managing digital identities, configuring network connections, testing code, and debugging when things go wrong. Each domain lists the specific competencies you're expected to master, which gives you a clear checklist of what to study. The learning materials are written in JavaScript, which is a common language for building applications that interact with Hyperledger Fabric. The repo itself appears to be study notes rather than a complete tutorial, it's organized by topic so someone cramming for the CHFD exam can jump to weak areas and understand what they need to learn. This would be useful if you're a developer working with blockchain in enterprise settings, or if your company is implementing a Fabric-based system and wants to certify that your team knows how to use it properly. The README doesn't include detailed code examples or explanations of what Hyperledger Fabric fundamentally is, so this works best as a reference guide for someone who already has some hands-on experience with the platform or is studying alongside official documentation. Think of it as organized notes on "what's on the test" rather than a standalone course.