Use python to build a blockchain system.

Run the command

pip install -r requirements.txt

python node.py

After installing packages, open the browser with the URL localhost:5000 (default)

For example, if we want to run 2 nodes in the network. Open two terminals and input the following commands for the corresponding terminal. Node 1 (This node runs in port 5000)

python node.py

Node 2 (This node runs in port 5001, you can change the port by yourself)

python node.py -p 5001

There are two node.py files. One is OLD_node.py, which is the legacy version of node.py and it only enable users to interact with the blockchain locally in the terminal. The new node.py achieves APIs server, and the Web UI is allowed.

Install pycryptodome, instead of pycrypto.

pip install pycryptodome

1. https://www.bilibili.com/video/BV1Hb411c7oH/
2. https://www.udemy.com/course/learn-python-by-building-a-blockchain-cryptocurrency/?couponCode=D_0323