Build a complete blockchain and smart contract with Go lang

Name: Build a complete blockchain and smart contract with Go lang
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Master blockchain development with Go. Build decentralized applications and smart contracts for absolute beginners.

Created byDave Partner

Last updated 11/2024

English

English [Auto],

What you'll learn

Blockchain Fundamentals: Understand the core concepts and architecture of blockchain technology, including distributed ledgers and consensus mechanisms.
Go Programming for Blockchain: Learn how to use Go (Golang) to develop blockchain applications with its efficient concurrency and strong typing features.
Building a Custom Blockchain: Step-by-step guide to creating your own blockchain from scratch using Go, covering blocks, transactions, and chaining mechanisms.
Consensus Algorithms: Code consensus mechanisms likeProof of Stake (PoS) and how to implement them in Go.
Creating Wallets and Addresses: Learn how to generate cryptographic wallets and blockchain addresses using Go’s elliptic curve digital signature algorithms (ECD
Transaction Management: Understand how to build and manage blockchain transactions, including signing, broadcasting, and validating them using Go.
Mining and Rewards: Implement mining algorithms, block validation, and reward mechanisms to incentivize miners in your custom blockchain.
Smart Contracts with Go: Build, deploy, and interact with smart contracts written in Solidity, integrated with Go and a blockchain platform like Ethereum or Cos
Blockchain Security Best Practices: Understand cryptographic security, attack vectors, and how to secure blockchain applications built with Go.
These topics cover the breadth of knowledge required to develop a fully functional blockchain and smart contract system using Go.

Course content

4 sections • 18 lectures • 2h 39m total length

Introduction3:16
Learn to build a complete blockchain from scratch using Go, handling transactions, blocks, node validation, and proof of stake, plus smart contracts with a secure API and Badger DB.
folder structure and setup10:28
Explore the folder structure and setup for a go blockchain project, including creating blockchain, api, contracts, storage folders, Badger DB integration, and go mod initialization.
writing and hashing the block19:36
Define a go block struct with timestamp, prev hash, transactions, validator and nonce; hash with sha256, and serialize blocks with gob for storage.
explanation of the block code3:08
Explain how a block uses timestamp, transactions, previous block hash, and validators public key, with a nonce, and how sha-256 hashes link blocks and serialize data for DB storage.
Transactions explained6:49
Explain how blockchain transactions are structured and signed with ecdsa in go, defining a transaction with input and output, and outlining hashing and serialization for a complete implementation.

code for creating new transaction6:12
Create a new transaction function that signs with the sender's private key, assigns an ID, and builds input and output with recipient and amount.
hashtransaction function4:59
Fix the hashtransaction by updating the transaction struct to TX input and TX output, then compute the hash with sha256 from the inputs and outputs, preparing for serialization.
Serialize and Deserialize data for the database.4:40
Serialize a transaction into a byte array for database storage using Go's encoder. Deserialize bytes with a new decoder and handle errors with log.Panic.
proof of stake consensus algorithm8:01
Write a proof-of-stake validator struct with a public key and stake, and implement a Go function that selects a validator based on their stake using a weighted random approach.
deploying a more powerful cryptography3:47
Learn to implement stronger cryptography for a blockchain by using crypto/rand and math/big to generate secure random numbers and select validators based on stake.

saveblock in badgerDB10:40
Open and manage a Badger DB for a blockchain in Go, implementing open db, close db, save block with its hash key, and get block by hash with deserialization.
debugging and updating files10:15
debug and update go blockchain code by implementing get block with error checks, ensuring proper db close, and preparing smart contracts integration with blockchain import, serialize and deserialize blocks.
writing the smart contract11:48
Implement a simple Go lang-based smart contract stored on the blockchain, featuring an ID, code, a state map with a creation timestamp, and execute and validate methods.
handleGetBlock() endpoint9:30
Build a Go API server with the Echo framework that exposes endpoints for posting transactions, fetching a block by hash via handleGetBlock, deploying and executing smart contracts on the blockchain.
smart contract server12:39
Write and broadcast blockchain transactions using the Echo framework, handle block queries, deploy smart contracts, and execute contracts via HTTP endpoints.

fetching all the blocks blockchain8:14
Implement a new smart contract struct, build an in memory blockchain, and implement get blocks to fetch by hash while resolving type and import issues during run and postman testing.
writing the main.go function11:39
Learn how to implement the main function in Go to initialize the blockchain, set up the database and genesis block, then start the API server.
testing the APIs14:02
Learn to test blockchain APIs with Postman, run the Go server, and perform transactions, deploy smart contracts, and execute them via API endpoints.

Requirements

Basic Programming Knowledge: Familiarity with any programming language is recommended, though no prior Go (Golang) experience is required.
Understanding of Web Development: Basic understanding of web technologies (HTML, HTTP, REST APIs) will be helpful but is not mandatory.
No Blockchain Experience Needed: No prior blockchain or cryptocurrency knowledge is required. This course covers everything from the ground up.

Description

Welcome to “Build a Complete Blockchain and Smart Contract with Go”, the ultimate course designed for developers and technology enthusiasts eager to learn blockchain technology from scratch using the powerful Go programming language. Whether you’re a beginner curious about decentralized technologies or an experienced developer looking to expand your skill set, this course is tailored to provide you with a hands-on, step-by-step guide to creating your own blockchain and deploying smart contracts.

Blockchain technology has revolutionized industries like finance, healthcare, supply chain, and more. It powers cryptocurrencies such as Bitcoin and Ethereum, but its potential goes far beyond just digital currencies. In this course, we will unlock the world of decentralized applications (dApps) and blockchain ecosystems by helping you build a blockchain from the ground up using Go, a language known for its simplicity, efficiency, and concurrency capabilities.

What You'll Learn:

This course will take you from the fundamentals of blockchain to the deployment of smart contracts. Here’s what you can expect to master:

Understanding Blockchain Fundamentals: We start with the basic building blocks of blockchain, covering concepts like blocks, transactions, cryptography, and distributed ledgers.
Go Programming for Blockchain: You’ll learn how to utilize Go's powerful toolset to build blockchain structures efficiently and with high performance.
Building a Custom Blockchain from Scratch: Through hands-on exercises, you will construct a fully functioning blockchain with capabilities such as adding blocks, verifying data integrity, and handling transactions.
Consensus Algorithms (PoW & PoS): Discover how blockchain networks reach agreement through consensus mechanisms such as Proof of Work (PoW) and Proof of Stake (PoS), and learn how to implement these in Go.
Cryptography and Security: Implement digital signatures and hashing to secure your blockchain. You’ll work with Go’s libraries to ensure the integrity of transactions and user authentication.
Creating Wallets and Addresses: Learn how to generate cryptographically secure blockchain wallets and public/private keys using Go.
Mining and Block Validation: Build a simple mining algorithm to validate and add blocks to the chain, including reward mechanisms for miners.
Smart Contracts and dApps: You’ll dive into the world of decentralized applications, learning how to write, deploy, and interact with smart contracts on blockchains such as Ethereum and custom chains built using Go.
Implementing Merkle Trees: Learn how to use Merkle Trees to efficiently verify the integrity of large sets of data, a crucial aspect of blockchain technology.
Building REST APIs for Blockchain: Learn how to create APIs that allow external applications to interact with your blockchain, making it accessible to users or other platforms.
Token Creation: You will create your own cryptocurrency token from scratch and handle transactions between wallets securely within your blockchain.
Cross-Chain Communication: Understand how different blockchain networks can communicate and how to bridge chains using interoperability standards.
Testing and Debugging Blockchain Applications: We will cover best practices for debugging your blockchain
Setting Up a Peer-to-Peer Network: Learn how to build a P2P network in Go, enabling decentralized node communication and synchronization.
Data Persistence with LevelDB: Explore how to store blockchain data using Go and databases like LevelDB, ensuring that your blockchain is persistent across sessions.
Scaling Blockchain Solutions: Discover how to optimize your blockchain for high throughput and scalability, making it suitable for real-world applications.
Blockchain Security Best Practices: Learn how to safeguard your blockchain network against common attack vectors such as Sybil attacks, 51% attacks, and double-spending.
Deploying Blockchain Nodes: Set up and configure nodes in a decentralized network, ensuring seamless peer-to-peer communication and synchronization.
Smart Contract Development with Solidity: You will also gain insight into using Solidity, the language for Ethereum smart contracts, and learn how to integrate Solidity contracts with Go applications.
Final Project: Building a Complete dApp: At the end of the course, you will combine everything you've learned to build and deploy a fully functioning decentralized application that interacts with a custom blockchain.

Who is this course for?

Beginner and Intermediate Developers: This course is perfect for anyone with basic programming experience, especially those familiar with Go. It’s also suitable for developers who are new to blockchain but want to gain practical, hands-on experience in building decentralized applications.
Blockchain Enthusiasts: If you’ve heard about blockchain and want to understand how it works under the hood, this course will guide you through creating your own blockchain from scratch.
Entrepreneurs: If you’re looking to create your own cryptocurrency, token, or decentralized platform, this course will give you the skills needed to develop and scale your ideas.
Software Engineers and Architects: Professionals interested in understanding blockchain infrastructure, consensus mechanisms, and security practices will gain deep insights into building resilient decentralized systems.

Why Use Go for Blockchain Development?

Go (Golang) is a modern, statically typed language created by Google, known for its simplicity, speed, and scalability. It is highly suitable for building blockchain applications due to its efficiency in handling concurrent operations and its extensive standard library. Blockchain platforms like Ethereum and Cosmos also utilize Go in their core infrastructures, making it an excellent language for decentralized applications.

Course Requirements

Basic knowledge of programming (experience with Go is beneficial, but not required).
A laptop or desktop computer with internet access.
Enthusiasm to learn cutting-edge technologies and hands-on blockchain development.

Who this course is for:

Developers curious about understanding how to build blockchains
Go developers that wish to advance their skills
People who wish to understand how to implement blockchain consensus algorithms like proof of stake

Build a complete blockchain and smart contract with Go lang

What you'll learn

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Course content

Introduction5 lectures • 43min

Lecture 25 lectures • 28min

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Section 43 lectures • 34min

Requirements

Description

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