Block[Chain] Alchemy Laboratory Framework

The source code of originally based on post on Building a Blockchain of Daniel van Flymen.

Installation

1. Make sure Python 2.7x is installed.

2. Install requirements (preferably inside a virtual environment).

$ pip install -r requirements.txt

5. Run the server:
   • $ python blockchain.py -p 5001 -db pow.db -v pow

Parameters

'-p', '--port', default=5000, type=int, help='port to listen on'
'-db', '--database', default='', help='db file, if not passed, then no persistance'
'-v', '--variant', default='pow', help='variant of blockchain "pow" or "pos"'
'-s', '--socket', default=6001, type=int, help='p2p port to listen on'
'-d', '--difficulty', default=2, help='initial difficulty'
'-k', '--keystore', default='/tmp/private_key.pem', help='where the keystore is located.'

Blockchain Mininet network

To install mininet please follow http://mininet.org/vm-setup-notes/, a fresh mininet virtual environment setup is recommended. For the VM Mininet 2.2.2 on Ubuntu 14.04 LTS - 64 bit follow these steps: Clone the project into a directory. cd to cloned directory.

sudo python setup.py install
sudo easy_install dist/bal-xxx.egg
sudo ln -s /home/mininet/bal/bal/blockchain.py /usr/local/bin/blockchain.py

change #!/bin/env python in blockchain.py to #!usr/bin/env python.

Mininet's custom setup for BAL classes balmn.py add several types of hosts:

• pow -- bcnode.POWNode
• pos -- bcnode.POSNode

For example:

mn --custom=balmn.py --host=pos

Simulating (under bal/bal directory):

./bcmn_test.py

More information

you may find in the project's Wiki.