Private Blockchain Project

In this project I created a private blockchain.
I implemented the classes defining the data structure for the blocks and the chain.
In order to be able to persist my blochchain I used LevelDB.
Finally I implemented GET and POST API endpoints using the hapijs framework.

Getting Started

1. Download or clone the repository
2. Install project dependencies: npm install
3. Start the web service: node app.js

API endpoints

The server runs locally by default on port 8000.
You may select a different one by updating the PORT parameter of the BlockAPI constructor in app.js.

• /api/block/height: to retrieve a block by its height/index.
• /api/block: to add a new block ("data=block's content")

Resources

• Starter code
• LevelDB to persist the data
• Node.js
• hapijs framework to build API web service
• crypto-js for SHA256 cryptographic function
• Understanding usage of async/await instead of regular promises:
  • https://ponyfoo.com/articles/understanding-javascript-async-await
  • https://www.twilio.com/blog/2015/10/asyncawait-the-hero-javascript-deserved.html