craiglmccarthy/python-blockchain

A simple blockchain in Python that I built by following Daniel van Flymen's (https://github.com/dvf) excellent medium article.

A simple blockchain in Python that I built by following Daniel van Flymen's (https://github.com/dvf) excellent medium article.

Some basic command-line examples

• Start node with default port

./venv/bin/python3.8 blockchain_port_params.py

• Start node with port 5000

./venv/bin/python3.8 blockchain_port_params.py -p 5000

• Start node with port 5001

./venv/bin/python3.8 blockchain_port_params.py -p 5001

API access examples via HTTPie

• Mine block using :5000 node

http GET http://0.0.0.0:5000/mine

• Post new transaction to :5000 node

http POST http://0.0.0.0:5000/transactions/new \
    sender=1uWiCHVaTb2GXJn6jUpNUnwzrZoPFyW2d \
    recipient=1Aaqx87nkHg42WsTMR5kNXPBnNrHp1sGXr \
    amount:=50

• Get entire Blockchain from :5000 node

http GET http://0.0.0.0:5000/chain

• Register another node with :5000 node

echo '{
    "nodes": ["http://localhost:5001"]
}' | http --json POST http://localhost:5000/nodes/register

• Resolve chain conflicts and switch to largest valid chain

http GET http://0.0.0.0:5000/nodes/resolve