Build a Blockchain from scratch (NodeJS).

Learn

• What is behind a blockchain by using simple code. It's not a complete implementation, but enough to understand how blockchains work and how they guarantee that blocks can never be changed.

• After creating our blockchain we'll try and tamper with it. This will demonstrate a blockchains ability to detect fraud.

• Adding the proof-of-work mechanism to our homemade Javascript blockchain. Proof-of-work will secure our blockchain against spammers and people trying to tamper with our blocks.

• :)

Getting Started

• git clone https://github.com/bliotti/make-a-blockchain

• cd make-a-blockchain

• yarn or npm install

• Switch to branch one

• git checkout one

• Start in the main.js file and follow the instructions in the comments

There are 4 branches total

• git checkout one
• git checkout two-Proof-of-Work
• git checkout three-transactions-minerewards
• git checkout four-signing

Final

• branches with commented-final or final are completed solutions.

SLIDES https://docs.google.com/presentation/d/15LVoFj7m2d0kZzJaGNSGMuDrRcT-jwOCv0srXMug2nk/edit?usp=sharing