Learn Blockchain By Building Your Own In JavaScript from Udemy

In this course you will be building your very own blockchain and decentralized blockchain network by using the JavaScript programming language. By building your own blockchain, you will learn how blockchain technology works under-the-hood, how decentralized blockchain networks function, how the code behind these technologies work, and why blockchain is such a secure and valuable technology.

The blockchain that you build in this course will have all of the following features:

A proof of work algorithm to secure the network.
Hashing algorithms to secure the data within the blockchain.
The ability to mine (create) new blocks that contain data.
The ability to create transactions and store them in blocks.
An API/server that will be used to interact with the blockchain from the internet.
It will be hosted on a decentralized blockchain network.
A consensus algorithms to verify that the network nodes have valid data and are synchronized.
A broadcasting system to keep the data in the blockchain network synchronized.
Many other awesome features. ...

When you have completed this course you will have built out your own blockchain prototype in code. You will have a thorough understanding of how blockchain technology actually works and why this technology is so secure and valuable. You will also have a deep understanding of how decentralized blockchain networks function and why decentralization is such an important feature for securing the blockchain. The whole process of storing, securing, and validating data/transactions on the blockchain will become very clear.

What's inside

Learning objectives

Have your own, fully functional, blockchain prototype.
Learn how the code behind blockchain technology functions.

Learn why blockchain technology is a very secure means of storing data.
Learn how a decentralized blockchain network works.

Have your own, fully functional, blockchain prototype.
Learn how the code behind blockchain technology functions.
Learn why blockchain technology is a very secure means of storing data.
Learn how a decentralized blockchain network works.

Syllabus

Introduction

Course Introduction

What You Will Learn In This Course

What Is A Blockchain?

Environment Setup

Project Source Code

Project Source Code Link Article

Building A Blockchain

Blockchain Introduction

Constructor Function Explanation

Prototype Object Explanation

Blockchain Constructor Function

Create New Block Method

Testing Create New Block Method

Get Last Block Method

Create New Transaction Method

Testing Create New Transaction Method

SHA256 Hashing

Hash Block Method

Testing Hash Block Method

What Is A Proof Of Work?

Proof Of Work Method

Testing Proof Of Work Method

Creating A Genesis Block

Section 1 Wrap-Up

Blockchain Source Code

Accessing The Blockchain Through An API

Building An API - Introduction

Setting Up ExpressJS

Building The API Foundation

Installing Postman & Body-Parser

Building The "GET /blockchain" Endpoint

Building The "POST /transaction" Endpoint

Building The "GET /mine" Endpoint

Testing The New Endpoints

Creating A Decentralized Blockchain Network

Decentralized Blockchain Network - Introduction

Creating Multiple Nodes

Testing The Nodes

Adding The Current Node's Url

New Endpoints Outline

Building "POST /register-and-broadcast-node" Endpoint - Part 1

Building "POST /register-and-broadcast-node" Endpoint - Part 2

Building "POST /register-node" Endpoint

UPDATE: Installing the "request" library

Testing "POST /register-node" Endpoint

Building "POST /register-nodes-bulk" Endpoint

Testing "POST /register-nodes-bulk" Endpoint

Testing All Network Endpoints

Synchronizing The Network

Synchronizing The Network - Introduction

Transactions Introduction

Refactoring Create Transaction Method

Building "POST /transaction/broadcast" Endpoint

Refactoring "POST /transaction" Endpoint

Testing Transaction Endpoints

Updating Mining Information

Updating Mining Endpoint

Building "POST /receive-new-block" Endpoint

Testing New Endpoints

Consensus

Consensus Introduction

Chain Is Valid Method

Testing Chain Is Valid Method

Building "GET /consensus" Endpoint

Testing "GET /consensus" Endpoint

Block Explorer

Block Explorer Introduction

Block Explorer Endpoints Outline

Get Block Method

Building "GET /block/:blockHash" Endpoint

Get Transaction Method

Building "GET /transaction/:transactionId" Endpoint

Get Address Data Method

Building "GET /address/:address" Endpoint

Adding The Block Explorer File

Block Explorer File Source Code

Block Explorer File Explanation

Testing The Block Explorer!

Conclusion

Course Recap

Next Steps

Congrats !!!

Good to know

Know what's good

, what to watch for

, and possible dealbreakers

Develops foundational knowledge and expertise in blockchain technology and applications

Taught by an experienced instructor with significant industry knowledge

Emphasizes practical application through project-based learning

Provides a comprehensive understanding of blockchain concepts, including proof of work, hashing algorithms, and consensus mechanisms

Engages learners with interactive exercises and assignments

Requires a strong foundation in programming principles and software development

Reviews summary

Recommended blockchain course

According to students, this course is well-received and is easy to follow given you have some prior knowledge of JavaScript. It provides engaging assignments that reinforce the material.

Prior JavaScript knowledge is helpful.

"easy to follow, but first you must have javascript knowledge"

Activities

Be better prepared before your course. Deepen your understanding during and after it. Supplement your coursework and achieve mastery of the topics covered in Learn Blockchain By Building Your Own In JavaScript with these activities:

Read 'Blockchain Revolution' by Don Tapscott and Alex Tapscott

Show steps

This book provides a comprehensive overview of blockchain technology and its potential impact.

View Blockchain Revolution: How the Technology... on Amazon

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Purchase or borrow the book from a library
Read the book thoroughly
Take notes and highlight key passages
Discuss the book's concepts with others

Compile a list of blockchain resources

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Having an organized collection of resources will aid in your blockchain learning journey.

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Identify relevant websites, articles, tutorials, and tools
Use a tool or spreadsheet to organize your findings
Share your compilation with other learners

Explore Hyperledger Fabric documentation

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Hyperledger Fabric is an open-source blockchain framework. Learning about it will provide context for your blockchain technology studies.

Browse courses on Hyperledger Fabric

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Visit Hyperledger Fabric's website
Browse the documentation and tutorials

Two other activities

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Show all five activities

Build a simple blockchain prototype

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Hands-on experience with a blockchain project will deepen your understanding.

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Choose a specific blockchain framework or platform
Design the architecture and functionality of your prototype
Implement the blockchain prototype using code
Test and debug your prototype
Deploy and experiment with your prototype

Write a blog post about the benefits of blockchain

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Writing about blockchain's benefits will deepen your understanding of its value.

Browse courses on Blockchain Applications

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Research the benefits of blockchain
Choose a specific angle or industry to focus on
Write a detailed outline
Draft your blog post
Proofread and edit your post

Career center

Learners who complete Learn Blockchain By Building Your Own In JavaScript will develop knowledge and skills that may be useful to these careers:

Blockchain Developer

Blockchain Developers create, design, test, deploy, and maintain blockchain networks and applications. They use their knowledge of blockchain technology, programming languages, and cryptography to build secure and efficient systems. This course provides a solid foundation in blockchain technology, covering topics such as proof of work algorithms, hashing algorithms, data mining, and consensus algorithms. By building their own blockchain prototype, learners will gain hands-on experience in the development and implementation of blockchain solutions.

See salaries and explore the career path for Blockchain Developer

Software Engineer

Software Engineers design, develop, test, and maintain software systems. They use their knowledge of programming languages, data structures, and algorithms to create efficient and reliable software solutions. This course provides a foundation in blockchain technology, which is becoming increasingly important in software development. By learning about blockchain's features and capabilities, Software Engineers can expand their skillset and become more competitive in the job market.

See salaries and explore the career path for Software Engineer

Data Scientist

Data Scientists use their knowledge of statistics, machine learning, and data analysis to extract insights from data. They work in a variety of industries, including finance, healthcare, and retail. This course provides a foundation in blockchain technology, which is becoming increasingly important in data science. By learning about blockchain's security and immutability features, Data Scientists can develop more secure and reliable data analysis solutions.

See salaries and explore the career path for Data Scientist

Security Analyst

Security Analysts use their knowledge of computer security to protect organizations from cyber threats. They work in a variety of industries, including finance, healthcare, and government. This course provides a foundation in blockchain technology, which is becoming increasingly important in cybersecurity. By learning about blockchain's security and immutability features, Security Analysts can develop more effective and efficient security solutions.

See salaries and explore the career path for Security Analyst

IT Architect

IT Architects design, implement, and maintain IT systems. They work in a variety of industries, including finance, healthcare, and government. This course provides a foundation in blockchain technology, which is becoming increasingly important in IT architecture. By learning about blockchain's scalability, security, and immutability features, IT Architects can design and implement more efficient and reliable IT systems.

See salaries and explore the career path for IT Architect

Project Manager

Project Managers plan, organize, and execute projects. They work in a variety of industries, including finance, healthcare, and construction. This course provides a foundation in blockchain technology, which is becoming increasingly important in project management. By learning about blockchain's transparency, accountability, and immutability features, Project Managers can improve the efficiency and effectiveness of their projects.

See salaries and explore the career path for Project Manager

Business Analyst

Business Analysts identify and analyze business needs and develop solutions to improve efficiency and effectiveness. They work in a variety of industries, including finance, healthcare, and retail. This course provides a foundation in blockchain technology, which is becoming increasingly important in business analysis. By learning about blockchain's transparency, accountability, and immutability features, Business Analysts can develop more effective and efficient solutions to business problems.

See salaries and explore the career path for Business Analyst

Data Architect

Data Architects design, implement, and maintain data systems. They work in a variety of industries, including finance, healthcare, and retail. This course provides a foundation in blockchain technology, which is becoming increasingly important in data architecture. By learning about blockchain's scalability, security, and immutability features, Data Architects can design and implement more efficient and reliable data systems.

See salaries and explore the career path for Data Architect

Database Administrator

Database Administrators manage and maintain databases. They work in a variety of industries, including finance, healthcare, and retail. This course provides a foundation in blockchain technology, which is becoming increasingly important in database administration. By learning about blockchain's security, immutability, and decentralization features, Database Administrators can improve the efficiency and effectiveness of their database management practices.

See salaries and explore the career path for Database Administrator

Information Security Analyst

Information Security Analysts protect organizations from cyber threats. They work in a variety of industries, including finance, healthcare, and government. This course provides a foundation in blockchain technology, which is becoming increasingly important in information security. By learning about blockchain's security and immutability features, Information Security Analysts can develop more effective and efficient security solutions.

See salaries and explore the career path for Information Security Analyst

System Administrator

System Administrators manage and maintain computer systems. They work in a variety of industries, including finance, healthcare, and retail. This course provides a foundation in blockchain technology, which is becoming increasingly important in system administration. By learning about blockchain's scalability, security, and immutability features, System Administrators can improve the efficiency and effectiveness of their system management practices.

See salaries and explore the career path for System Administrator

Financial Analyst

Financial Analysts provide financial advice to individuals and organizations. They work in a variety of industries, including finance, healthcare, and government. This course provides a foundation in blockchain technology, which is becoming increasingly important in financial analysis. By learning about blockchain's transparency, accountability, and immutability features, Financial Analysts can develop more effective and efficient financial analysis solutions.

See salaries and explore the career path for Financial Analyst

Investment Analyst

Investment Analysts provide investment advice to individuals and organizations. They work in a variety of industries, including finance, healthcare, and government. This course provides a foundation in blockchain technology, which is becoming increasingly important in investment analysis. By learning about blockchain's transparency, accountability, and immutability features, Investment Analysts can develop more effective and efficient investment analysis solutions.

See salaries and explore the career path for Investment Analyst

Quantitative Analyst

Quantitative Analysts use mathematical and statistical models to analyze financial data. They work in a variety of industries, including finance, healthcare, and government. This course may provide a foundation in blockchain technology, which is becoming increasingly important in quantitative analysis. By learning about blockchain's security, immutability, and decentralization features, Quantitative Analysts may be able to develop more effective and efficient financial models.

See salaries and explore the career path for Quantitative Analyst

Risk Manager

Risk Managers identify and manage risks for organizations. They work in a variety of industries, including finance, healthcare, and government. This course may provide a foundation in blockchain technology, which is becoming increasingly important in risk management. By learning about blockchain's security, immutability, and decentralization features, Risk Managers may be able to develop more effective and efficient risk management solutions.

See salaries and explore the career path for Risk Manager