Build your own Proof Of Stake Blockchain

Name: Build your own Proof Of Stake Blockchain
Rating: 4.5 (429 reviews)

From Transactions to Proof of Stake Consensus in your own P2P Network of Nodes in Python

Created byLukas Hubl

Last updated 11/2021

English

What you'll learn

Python Blockchain Development from Scratch
Advantages of Proof of Stake over Proof of Work
Implementing a Decentralized P2P Network
Finding Consensus in a Network of mutually untrusted Nodes
REST-API to communicate with your own Blockchain

Course content

11 sections • 49 lectures • 8h 58m total length

Introduction5:01
Hi guys!
Welcome to my course here on Udemy. First of all, thank you very that you chose this course, it will be a fun journey from this blank piece of paper, or more like blank Python project, to a fully functioning Proof of Stake based Blockchain.
After 10 years of coding I found out that I learn and understand new topics best if I get my hands dirty and practically try things out. That not only helps me with understanding the topic, it is also way more fun.
Therefore I also chose this type of format in this course, brief theory and lots of practice! Nevertheless, there is some theory to cover in this first section to get an understanding on whats going on in the world of cryptography, at least for that small part we are using in order to build our Blockchain.
So, let's not waste any more time and start learning!
Python Environment0:01
Hi guys!
In order to be able to follow the coding videos easily, I suggest to first of all make sure that the Python Environment is correctly set up. Throughout this course, I was using Python 3.7 which I also would recommend you to use.
For the installation on your machine, I suggest downloading and following the installation description provided on: https://www.python.org/downloads/.
After installing Python, the only thing missing before you are ready to start coding is installing the dependencies used throught the course. Therefore use the requirements.txt file I provided, open a terminal window and enter pip install -r requirements.txt. Notice that the requirements.txt file has to be within your terminals current directory.
Headstart into Cryptography9:55
In this Lecture:
You will learn the difference between single-key and public-key crypto
You will learn the very basic concepts of public-key cryptography with RSA
You will learn what a digital signature is
You will learn what encryption is
You will learn what the SHA-256 algorithm is

Blockchains in the wild0:16
Hi guys!
In this section I will provide you with some references to projects which are actively making use of Blockchain technology. The majority of people think Blockchains are always related to financial activities and so did I. In reality though, the potential of Blockchains is far beyond that. If you are interested in some current use cases, take a look at these references.
Have fun!
RSA Keys
Here you can find the serialized RSA keys which are used throughout this course.
Related Papers0:04
This Lecture provides you with additional papers and information to the topic of consensus algorithms.

Introduction to Transactions9:24
In this theoretical introduction to Transactions we will unveil that Transactions are the most fundamental building block within Blockchain systems.
Furthermore, you will learn about the types of Transactions we will implement and use throughout this course which are the following three types:
Transfer Transaction
Exchange Transaction
Stake Transaction
Implementing Transaction Class13:02
In this very first coding video we will start with the implementation of the Transaction class.
What we will cover:
Transaction initializer
toJson method for human readable representation
Test Application
Signing Transactions using a Wallet16:14
Detecting invalid Transactions14:41
Consistent Transaction Representation13:48
Transaction Pool10:55

Introduction to the Account Model7:18
In the Paper from Chakravarty et al. 'The Extended UTXO Model', the different approaches on keeping track of the accounts balances are discussed. It compares the solution of UTXO's used in Bitcoin to the Account Model used in Ethereum.
Account Model Implementation10:18
Integration into Blockchain11:32
Introducing Exchange Transactions8:57
Executing Block Transactions12:10
Removing Transactions from TransactionPool10:34

Requirements

Basic understanding of the Python programming language
Curiosity and passion to know more :)

Description

Did you ever wonder what's behind the hype around Blockchain? In this practical development guide you will learn why this emerging technology could be a real game changer across industries. With a strong emphasis on learning by doing, we will cover all the necessary modules required for the Blockchain to work. If you prefer practice and deeper understanding to theory and books, this course is just right for you.

About your instructor

Hi, my name is Lukas, I am currently 25 years old and I am studying Mobile Computing and Computer Science in Austria and Sweden. I started my personal journey as developer way back when I was 15 years old and my main main goal since then is to steadily improve my skillset.

After several years in the sector of machine learning, data science and self driving vehicles, I decided to dive deeper in the topic of Blockchains. That's also the reason why I decided to do my Master's Thesis in the field of Consensus Algorithms.

The reason why I decided to share this course here on Udemy is because I really want Blockchain to succeed in the end and I strongly belief that a broader understanding on the topic itself is a major milestone in pushing the technology further, especially in it's acceptance. I would be very happy if I can contribute to this with my course.

What you will learn and implement

Cryptographic Signatures
RSA Public Key Cryptography
SHA-256 Hashes

Transactions - The purpose of Transactions in a Blockchain Systems.
Blocks - The most essential building block.
Blockchains - Whats going on behind the scenes.
P2P Network - How to find and communicate with other Nodes.
REST API - How to make use of your Blockchain System.

Python
P2P Peer Discovery
Socket Communication
REST Endpoints
Threading & Parallelization

Who this course is for:

Blockchain Enthusiasts
Python Developers
People who are excited about building their own Distributed Ledger System
Developers who want to implement their own Proof of Stake Algorithm

Build your own Proof Of Stake Blockchain

What you'll learn

Explore related topics

Course content

Introduction3 lectures • 15min

Related Work & Material3 lectures • 1min

Transactions6 lectures • 1hr 18min

Blocks3 lectures • 34min

Blockchain3 lectures • 35min

Blockchains Account Model6 lectures • 1hr 1min

Node2 lectures • 10min

P2P Communication8 lectures • 1hr 35min

REST API5 lectures • 1hr 8min

Proof of Stake9 lectures • 2hr 8min

Requirements

Description

Who this course is for: