Build your own Blockchain from Scratch : Golang

Name: Build your own Blockchain from Scratch : Golang
Rating: 4.3 (8 reviews)

Learn to build your own decentralized Proof of Work Blockchain from scratch in Golang.

Created bySaptarsi Halder

Last updated 7/2024

English

What you'll learn

Master the fundamentals of blockchain technology by building your own blockchain from scratch using Golang
Gain proficiency in Golang, learning essential programming concepts and techniques specific to this powerful language
Develop and run a robust HTTP server in Golang, enabling seamless communication and data exchange
Learn how to create and handle API requests, and develop a secure blockchain wallet for managing transactions
Understand transactions, transaction hashes, and fundamental blockchain concepts
You'll explore mining and understand how proof of work algorithm operates.

Course content

7 sections • 62 lectures • 9h 29m total length

Source Code used in the Course0:20
Please find the source code of the blockchain we developed during this course below.
Sending Cryptocurrency using Blockchain5:41
What is Blockchain ?6:40
Basics of Blockchain

Implementing a Custom Logger6:44
In this video tutorial, we will learn how to create our custom logger using golang's standard log library.
Implementing the Block Struct9:42
In this video tutorial, we will learn how to implement the Block, using struct data type of Golang.
Implementing the Transaction Struct7:21
In this video tutorial, we will learn how to implement the Transaction, using struct data type of Golang.
Implementing the Blockchain Struct10:57
In this video tutorial, we will learn how to implement the Blockchain, using struct data type of Golang.
Calculating the Hash of the Block6:03
In this video tutorial, we will learn how to hash a block using Sha256 hashing.
Adding the Transaction to Transaction Pool2:11
In this video tutorial, we will learn how to add the incoming transaction to the Transaction Pool of our Blockchain struct.
Adding the Transaction from Transaction Pool to the Block10:03
In this video tutorial, we will learn how to add the transactions present in the transaction pool to a new Block.
What is Proof of Work algorithm and Mining ?6:07
In this video tutorial, we will learn what is Proof of Work algorithm and where exactly mining comes into picture
Implementing the Proof of Work algorithm11:46
In this video tutorial, we will learn how to implement the Proof of work algorithm using basic loops and conditional statements in golang.
Rewarding the Miners7:35
In this video tutorial, we will learn how to reward the miners and create a reward transaction.
Adding the Block to our Blockchain10:34
In this video tutorial we will learn to add the block to our slice of block, using append function in golang.
Testing and Running our Blockchain9:57
In this video tutorial we will add the functionality to run our blockchain in the main function and we will also test the program that we have created till now.
Persistence: Installing and Learning to Use LevelDB13:18
In this video tutorial we will learn to install and use the basic functionality of Level DB in golang.
Persistence: Saving the Blockchain Information into the Database9:32
In this video tutorial we will use the functions we created in the last lecture to save our blockchain information into the database.
Persistence: Handling Persistence on State Change6:40
In this video tutorial we will learn to trigger the save blockchain function whenever there is change in the Blockchain state.
Calculate Total Cryptocurrency in a Blockchain Address
Calculate Total Crypto in a Blockchain Address13:06
In this video tutorial we will learn to create a function to calculate total cryptocurrency in the Blockchain address.

Cryptography in brief6:29
In this video tutorial, we will learn basics of public key cryptography and take a brief look into Elliptic curves.
Basics of Wallet
Creating a New Wallet7:40
In this video tutorial, we will learn to create the wallet struct and also generate private and public key.
Generating Address for our Wallet9:02
In this video tutorial, we will learn to generate address for our wallet using the public key and sha256 hashing.
Restoring the Wallet From Hex Representation of Private Key10:59
In this video tutorial, we will learn to convert our private key in hexadecimal format to ecdsa format and hence restore our wallet.
Signing the Transaction10:54
In this video tutorial, we will learn to sign the transaction from our private key by using SignASN1 function.
Converting Public Key to ECDSA type from its Hex representation
Convert Public Key to ECDSA type from its Hex representation5:30
In this video tutorial, we will learn to convert our hexadecimal representation of public key to its corresponding ECDSA type.
Verifying the Signature of a Transaction7:18
In this video tutorial, we will learn to verify the signature of a Transaction using VerifyASN1 function.

HOTFIX 1: Fixing ProofOfWorkMining Function17:12
In this video tutorial, we will change the main function and run our blockchain. We will also test it and fix any bug that occurs.
HOTFIX 2: Fixing AddBlock Function13:14
In this video tutorial, we will fix a bug in our AddBlock function and run our blockchain to check if our code is working perfectly.
HOTFIX 3: Adding Blocknumber in Block Struct13:14
In this video tutorial we will add a field block_number to our Block Struct, and increment it whenever new block is added.
Basics of Testing and debugging

Blockchain Server : Creating the Blockchain Server9:39
Blockchain Server : Creating the GetBlockchain API6:52
In this video tutorial, we will learn to create a rest api that returns our blockchain struct in JSON format.
Learning to implement a basic Get Blockchain API
Blockchain Server : Creating the GetTotalCrypto API7:25
In this video tutorial, we will learn to create a rest api that returns the total balance of an address in JSON format.
Blockchain Server : Creating an API to get all non-rewarded transactions12:31
In this video tutorial, we will learn to create a rest api that returns all the transactions except reward transactions as a list in JSON format.
Blockchain Server : Creating the SendTransaction API12:13
In this video tutorial, we will learn to create a rest api that posts a transaction to our blockchain.
Wallet Server : Creating the Wallet Server6:45
In this video tutorial, we will learn to create a new http server using golang.
Wallet Server : Creating an API to generate a New Wallet7:35
In this video tutorial, we will learn to create an API that creates a new wallet and returns us the private key, public key and its address in JSON format.
Saving Wallet Struct into the Database
Wallet Server : Creating a Wallet API to calculate total crypto balance10:48
In this video tutorial, we will learn to create an API that calculates total cryptocurrency of an address by querying the blockchain.
Wallet Server : Creating a Wallet API to Sign and Send Transaction19:08
In this video tutorial, we will learn to sign an unsigned transaction and send it to the blockchain.
HOTFIX : Adding return Statements in Error Handling3:20
In this video tutorial, we will add return statements in error handling.
Adding more Verification for the Transaction11:30
In this video tutorial we will add more verification for Transaction.
CLI : Creating Command Line Interface to launch the Blockchain Server13:26
In this video we will use golangs standard library to create a command line interface to launch our blockchain and blockchain server.
CLI : Creating Command Line Interface to launch the Wallet Server3:48
In this video tutorial we will learn to create a Command line interface to launch our wallet server.
Demonstration of our APIs and the CLI8:17
In this video tutorial we will see the demonstration of our APIs and CLI that we have created in this section. Also we will fix any bugs occuring during the demonstration.

Adding a remote node flag in the CLI7:48
In this video tutorial, we will learn to add a new flag "remote_node" to the CLI that we have developed previously.
Syncing the Blockchain from the Remote Node13:37
In this video tutorial, we will connect to a node in the blockchain network and sync its blockchain and start mining on the synced blockchain.
Peers Sync : Creating an API to send peers map11:27
In this video tutorial, we will learn to create an api that will send one node's peers map to the other node.
Peers Sync : Update Peers List Function and Create Ping Peers API6:22
In this video tutorial we will create auxilary functions that will help us update the peers list of our blockchain and create an api to ping our peers.
Peers Sync : Create a function to check peers status and Broadcast Peers List11:03
In this video tutorial we will learn to call our checkPeerStatus api and broadcast our peers list to the peers.
Peers Sync : Dialing Peers and Updating the Peers Map6:42
In this video tutorial, we will learn to dial our peers and get their status and update our peers list all at the same time.
Peers Sync : Integrating All Components and Demonstrating Peer Syncing11:55
In this video tutorial, we will learn to run our peers syncing function as a go routine and will also see a demonstration of peers syncing.
Transaction Pool Sync : Fix Double Spending Problem and Add Mutex10:47
In this video tutorial, we will look into and fix the Double Spending Problem and Add Mutex to prevent race condition.
Transaction Pool Sync : Syncing the Transaction across peers9:54
In this video tutorial, we will sync the transaction in the transaction pool across peers.
Transaction Pool Sync : Fixing Race and Multiple Broadcast with Demonstration11:01
In this video tutorial, we will fix a race condition, prevent multiple broadcast of transaction across peers and shall also see the demonstration of syncing transaction pool.
What is Consensus ?4:54
In this video tutorial, we will learn what is consensus algorithm.
Consensus : Fetch Last 50 Blocks9:18
In this video tutorial, we will learn to fetch the last 50 blocks from our blockchain.
Consensus : Verify Last 50 Blocks5:47
In this video tutorial we will learn to verify the last 50 blocks that we fetched in the previous video.
Consensus : Update the Blockchain with the longest chain12:55
In this video tutorial, we will update our existing blockchain in case the chain that we fetched is the longest blockchain.
Consensus : Part 1 - Implementing the Consensus Algorithm (Longest Chain Wins)10:21
In this video tutorial, we will implement the consensus algorithm, where the longest chain will always dominate.
Consensus : Part 2 - Impelmenting the Consensus Algorithm (Stop & Start Mining)12:57
In this video tutorial, we will start and stop mining while updating our blockchain.
Consensus : Part 3 - Testing, Bug Fixing and Scripting12:12
In this video tutorial, we will look into some bash scripts that will help us in the demonstration and also test and fix any issues occuring while running the consensus algorithm.

Requirements

Just the basics of Golang
Comfortable with either a Windows or Linux machine.

Description

Embark on an immersive journey into blockchain technology with our comprehensive course on creating a blockchain from scratch using GoLang. Designed across five dynamic sections, this course begins by laying a solid foundation in blockchain fundamentals, guiding you through the intricacies of building a persistent blockchain with LevelDB integration. You'll delve into cryptographic principles by developing secure wallets using GoLang's ECDSA standard library, and then progress to decentralizing your blockchain network for enhanced security and resilience. By the course's conclusion, you'll seamlessly integrate these elements, equipping you with not just technical expertise, but the confidence to innovate and thrive in the rapidly evolving blockchain industry.

What you will learn in this course ?

The fundamentals of blockchain technology.
How to implement a persistent blockchain using LevelDB.
Cryptographic techniques for creating secure wallets with GoLang's ECDSA.
Strategies for decentralizing a blockchain network.
Integration and deployment of your blockchain application

Why Take this Course ?

This course isn't just about learning to code; it's about empowering you to create something truly remarkable. By the end of this course, you will have built your own blockchain, created a wallet, and understood how to decentralize your network. These are invaluable skills that can open up new career opportunities and position you as a knowledgeable professional in the blockchain industry.

But beyond the technical skills, this course is about igniting your passion for innovation and technology. Imagine the sense of accomplishment you'll feel as you see your blockchain come to life, knowing that you've created it from scratch. Picture yourself confidently discussing blockchain technology with peers and potential employers, showcasing the impressive project you've completed.

Join us on this exciting journey and transform your curiosity into competence. Enroll now and start building your future with blockchain technology and GoLang!

Who this course is for:

Working professionals and students of all age groups
Beginners in Golang
Beginners interested in blockchain
Investors seeking to grasp blockchain technology

Build your own Blockchain from Scratch : Golang

What you'll learn

Explore related topics

Course content

Introduction to Blockchain3 lectures • 13min

Building the Blockchain16 lectures • 2hr 22min

Building our Wallet7 lectures • 58min

Testing and Bug Fixing3 lectures • 44min

Creating the CLI and APIs for our Blockchain and Wallet14 lectures • 2hr 13min

Making the Blockchain Distributed and Decentralized17 lectures • 2hr 49min

Ultimate Product of this Course2 lectures • 12min

Requirements

Description

Who this course is for: