central bank library / gem and command line tool - print your own money / cryptocurrency; run your own federated central bank nodes on the blockchain peer-to-peer over HTTP; revolutionize the world one block at a time

Command Line

Use the centralbank command line tool. Try:

$ centralbank -h

resulting in:

Usage: centralbank [options]

  Wallet options:
    -n, --name=NAME                  Address name (default: Alice)

  Server (node) options:
    -o, --host HOST                  listen on HOST (default:
    -p, --port PORT                  use PORT (default: 4567)
    -h, --help                       Prints this help

To start a new (network) node using the default wallet address (that is, Alice) and the default server host and port settings use:

$ centralbank

Stand back ten feets :-) while starting up the machinery. Ready to print (mine) money on the blockchain? In your browser open up the page e.g. http://localhost:4567. Voila!

Note: You can start a second node on your computer - make sure to use a different port (use the -p/--port option) and (recommended) a different wallet address (use the -n/--name option). Example:

$ centralbank -p 5678 -n Bob

Happy mining!

Local Development Setup

For local development - clone or download (and unzip) the centralbank code repo. Next install all dependencies using bundler with a Gemfile e.g.:

# Gemfile

source "https://rubygems.org"

gem 'sinatra'
gem 'sass'
gem 'blockchain-lite'


$ bundle       ## will use the Gemfile (see above)

and now you're ready to run your own centralbank server node. Use the config.ru script for rack:

# config.ru

$LOAD_PATH << './lib'

require 'centralbank'

run Centralbank::Service

and startup the money printing machine using rackup - the rack command line tool:

$ rackup       ## will use the config.ru - rackup configuration script (see above).

In your browser open up the page e.g. http://localhost:9292. Voila! Happy mining!


Programming Cryptocurrencies and Blockchains (in Ruby) by Gerald Bauer et al, 2018, Yuki & Moto Press

And many more @ Best of Crypto Books - a collection of books, white papers & more about crypto and blockchains


The centralbank scripts are dedicated to the public domain. Use it as you please with no restrictions whatsoever.