acute-blockchain

README

Acute Blockchain - A minimalistic blockchain implementation in Go

This is a minimalistic implementation of a blockchain with the Go programming language (Golang). It is basically a port of Naivechain.

Purpose

• Understand the Naivechain concept better
• Learn Go (in particular Websockets)
• Compare Javascript and Go implementations

Quick start

To get started:

1. Clone or fork this repository
2. Install go version 1.11 or later
3. Run go get

Then, you can start two or more nodes running on different posts (inside two separate terminals):

PORT=3000 go run main.go hub.go
PORT=3001 go run main.go hub.go

You can then add the second process as peer of the first one:

curl -XPOST -d 'localhost:3001' http://localhost:3000/addPeer

You can then mine a block on a given node by posting some data to the mineBlock API:

curl -XPOST -d 'Second block mined by first process' http://localhost:3000/mineBlock

You can check that the blockchain on the two nodes is identical by running the following commands:

curl http://localhost:3000/blocks
curl http://localhost:3001/blocks

The output of both commands should be something like the following (pretty-printed):

[
  {
    "index": 0,
    "timestamp": 0,
    "previousHas": "1465154705",
    "data": "בראשית",
    "hash": "816534932c2b7154836da6afc367695e6337db8a921823784c14378abed4f7d7"
  },
  {
    "index": 1,
    "timestamp": 1560182697635975000,
    "previousHas": "816534932c2b7154836da6afc367695e6337db8a921823784c14378abed4f7d7",
    "data": "Second block mined by first process",
    "hash": "2723d64bab200e7bf23f10a602153c50ddb8bcba1770d56b20f4ef00db3842e2"
  }
]