Building Your Own Private Blockchain

About

From Udacity:

Create your own private blockchain as you learn to architect a blockchain data model. The focus will be on the development of a private chain of blocks which is cryptographically secure and immutable.

Supporting courses:

• Blockchain Data

Requirements

• Node
• Node Package Manager (npm)

Install

1. npm install

Test

This codebase contains some quick integration tests. To test you will need to populate a test blockchain, uncomment the lines you wish to test in the provided test files, and then run the test files.

1. node tests/integration/populateTestBlockchain.js
2. node tests/integration/testBlockchain.js
3. node tests/integration/testBlockchainData.js

Code Quality

This codebase adheres to the Airbnb JavaScript/React/JSX Style Guide

Code Organization

├── README.md
├── index.js
├── original_files
│   ├── levelSandbox.js
│   └── simpleChain.js
├── package.json
├── src
│   ├── block.js
│   ├── blockchain.js
│   └── blockchainData.js
└── tests
    └── integration
        ├── populateTestBlockchain.js
        ├── testBlockchain.js
        └── testBlockchainData.js

4 directories, 11 files

Grading (by Udacity)

Criteria	Highest Grade Possible	Grade Recieved
Configure LevelDB to persist dataset	Meets Specifications	Meets Specifications
Modify simpleChain.js functions	Meets Specifications	Meets Specifications
Modify validate functions	Meets Specifications	Meets Specifications
Modify getBlock() function	Meets Specifications	Meets Specifications
Modify getBlockHeight() function	Meets Specifications	Meets Specifications