Blockchain Development Course

Lesson 1 • Distributed Ledger Technology Overview

Covers the architecture of distributed ledgers and how they differ from centralised databases. Establishes the conceptual foundation for all subsequent blockchain topics.

Lesson 2 • Blockchain Network Types

Distinguishes public, private, and consortium blockchains and their appropriate use cases. Guides students in selecting the right network type for a given project.

Lesson 3 • Blockchain Data Structures

Examines how blocks, chains, and transaction records are structured and linked. Understanding this layout is essential before studying consensus and smart contracts.

Lesson 4 • Cryptographic Foundations for Blockchain

Introduces hash functions, digital signatures, and public-key cryptography as used in blockchain protocols. These primitives underpin transaction integrity and identity verification.

Lesson 1 • Wallet and Account Management

Covers creating and managing cryptographic key pairs, wallets, and account addresses. Proper key management is critical for secure development and deployment workflows.

Lesson 2 • Local Blockchain Simulation

Demonstrates running a local blockchain emulator for rapid development and testing. Simulated networks eliminate cost and latency barriers during early development.

Lesson 3 • Version Control for Blockchain Projects

Applies Git workflows to blockchain codebases, including managing secrets and build artifacts. Good version control habits prevent key exposure and enable team collaboration.

Lesson 4 • Development Toolchain Installation

Guides installation of node runtimes, package managers, and blockchain-specific CLI tools. A working toolchain is the prerequisite for all hands-on exercises ahead.

Lesson 1 • Functions, Events, and Errors

Covers function declarations, event emission, and custom error handling patterns. Events and errors are essential for off-chain monitoring and user-facing feedback.

Lesson 2 • Contract Compilation and ABI

Demonstrates compiling contracts to bytecode and generating the Application Binary Interface. The ABI is the bridge between on-chain logic and off-chain applications.

Lesson 3 • Smart Contract Language Basics

Introduces the syntax, data types, and control structures of a smart contract language. Mastery of language basics is required before writing meaningful contract logic.

Lesson 4 • State Variables and Storage

Explains on-chain storage layout, state variable declarations, and storage vs. memory distinctions. Efficient storage use directly impacts gas costs and contract performance.

Lesson 1 • Security Auditing Techniques

Introduces manual code review checklists, static analysis tools, and fuzzing for contract audits. Systematic auditing reduces the risk of costly post-deployment exploits.

Lesson 2 • Access Control and Authorisation Patterns

Implements ownership, role-based access, and multi-signature authorisation in contracts. Proper access control prevents unauthorised state changes and fund withdrawals.

Lesson 3 • Common Smart Contract Vulnerabilities

Catalogues reentrancy, integer overflow, access control flaws, and other critical attack vectors. Recognising vulnerabilities is the first step toward writing secure contracts.

Lesson 4 • Upgradeable Contract Patterns

Explains proxy patterns that allow contract logic to be updated without changing the deployed address. Upgradeability must be balanced against decentralisation and security risks.

Lesson 1 • Multi-Token and Semi-Fungible Standards

Explores batch transfer standards that combine fungible and non-fungible tokens in one contract. Batch operations reduce gas costs and simplify complex asset management.

Lesson 2 • Fungible Token Standards

Covers the interface, events, and approval mechanics of the dominant fungible token standard. Compliance with the standard ensures interoperability across wallets and exchanges.

Lesson 3 • Lending and Collateral Protocols

Covers collateralised lending, interest rate models, and liquidation logic used in DeFi lending. These primitives form the backbone of on-chain credit markets.

Lesson 4 • Non-Fungible Token Standards

Implements the NFT standard including ownership tracking, safe transfers, and metadata URIs. NFTs underpin digital ownership in gaming, art, and real-world asset tokenisation.

Lesson 1 • Code Coverage and Test Reporting

Measures statement, branch, and function coverage and generates actionable test reports. Coverage metrics guide developers toward untested code paths before deployment.

Lesson 2 • Unit Testing Smart Contracts

Writes isolated tests for individual contract functions using a JavaScript or TypeScript test framework. Unit tests catch logic errors early and document expected contract behaviour.

Lesson 3 • Mocking and Test Helpers

Uses mock contracts and helper utilities to isolate dependencies and simulate edge cases. Mocking enables testing of complex interactions without deploying full protocol stacks.

Lesson 4 • Property-Based and Fuzz Testing

Generates random inputs to discover unexpected contract behaviours and invariant violations. Property-based testing finds edge cases that manually written tests routinely miss.

Lesson 1 • Decentralised Storage Integration

Stores and retrieves NFT metadata, user files, and application assets on decentralised storage networks. Off-chain storage reduces on-chain costs while preserving data availability.

Lesson 2 • Wallet Connection and Authentication

Implements browser wallet connection flows, account switching, and network change detection. Seamless wallet UX is critical for user adoption of decentralised applications.

Lesson 3 • Reading and Displaying On-Chain Data

Fetches and renders token balances, contract state, and historical events in a React or similar UI. Efficient data fetching minimises RPC calls and improves application responsiveness.

Lesson 4 • Transaction Lifecycle Management

Guides users through transaction submission, confirmation tracking, and failure recovery in the UI. Clear transaction feedback reduces user confusion and support burden.

Lesson 1 • Gas Optimisation Strategies

Applies storage packing, calldata optimisation, and algorithmic improvements to reduce transaction costs. Lower gas costs improve user experience and protocol competitiveness.

Lesson 2 • On-Chain Monitoring and Alerting

Sets up event-driven monitoring, anomaly detection, and automated alerts for live contracts. Proactive monitoring enables rapid response to exploits, bugs, and unusual activity.

Lesson 3 • Contract Verification and Transparency

Submits source code to block explorers for public verification and builds user trust. Verified contracts allow users and auditors to inspect logic directly on the explorer.

Lesson 4 • Governance and Protocol Upgrades

Implements on-chain governance proposals, voting, and timelock-controlled upgrades for live protocols. Decentralised governance ensures community oversight of critical protocol changes.