How to Build a Blockchain from Scratch with Rust Programming Language

How to Build a Blockchain from Scratch with Rust Programming Language

This is a series in which we will build a basic blockchain-based cryptocurrency in the programming language Rust.

Have you ever wanted to build your own cryptocurrency? Or learn Rust? Well, now you can. This is the first video in a series in which we will build a basic blockchain-based cryptocurrency in the programming language Rust. Don't know Rust? No problem! I'll be explaining some of the basics of Rust programming along the way. This tutorial series will be easier to follow if you have experience with lower-level/systems programming in languages like Assembly, C, or C++ and/or if you have experience with languages that have strict/complex type systems like Java or Haskell (at least stricter than Python or JavaScript).

Timestamps: 2:18 - Blockchains for Programmers 4:43 - Concept: Hashing 6:35 - What we will be using 9:52 - Code comparison (Java, Rust, JavaScript) 14:19 - Overview of starter files 15:54 - First line of code written: Implementing the Block struct 18:11 - Implementing Block "constructor" 21:40 - Implementing Debug formatter 27:26 - Creating the Hashable trait 30:52 - Implementing Hashable on Block

Let "mining Bitcoin" not be a mysterious concept anymore! Through our (so far) basic block implementation, I'll explain and demonstrate the essential concepts of mining, difficulty, and nonces. We're on our way to becoming the next Bitcoin! (Well, maybe not... But we're getting closer!)

Timestamps 4:12 Difficulty 8:34 Implement: Check Difficulty 11:23 Nonce 13:08 Mining Strategy (Algorithm) 14:58 Implementing the mine(&mut self) function 17:23 Testing the code we've written so far 21:44 Review: What does are the implications of the nonce for blockchain security?

We can use the infrastructure we've built so far to secure a blockchain. Note that I am NOT a security professional, and the information presented in this video is not to be taken as any sort of certified advice.

Timestamps 00:37 Description of the Blockchain struct 00:53 Implement: Blockchain Struct 02:01 Creating a block-chain 06:03 Review: Mining 07:17 Block Verification 10:16 Implement: Blockchain Verification 17:33 Testing the verify() function

What does it mean to own a Bitcoin? How do transactions work on the blockchain? In this concept video (no coding!) we'll go over the basics of how and why transactions work on the blockchain.

Timestamps 00:40 Example transaction 01:45 Transaction verification requirements 04:55 The blockchain as a "distributed ledger" 06:12 Structure of a transaction 08:09 Regular transactions 10:30 Coinbase transactions 12:10 Transactions: Bad Artwork 12:50 Recap 13:24 Meeting tx verification requirements 13:38 Overspending 14:10 Double spending 15:36 Impersonation 16:58 Further reading

Cool features of the Rust language, maintaining an unspent output pool, and more in this doozy of a video! Ha. I'm not a security professional; for all practical purposes I'm a random guy on the Internet. DYOR, IANAL, RTFM, CYA, kthxbye.

This video is super long because there was a heckin lotta code to write.

Timestamps 00:17 Iterators 02:20 Implement: Transaction & Output 14:13 Errors in Rust 15:51 Null in Rust 16:46 Updating our Blockchain 18:31 Implement: Transaction checking 36:42 Writing a working example 37:55 Implement: Working example 42:32 First run and various testing 47:21 Notes/security concerns

Github: https://github.com/GeekLaunch/blockchain-rust Blog: https://medium.com/geeklaunch/blockchain-in-rust-01-blocks-hashing-4192f2265d3d

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