Simple Blockchain implementation in python

Simple python implementation of a blockchain and the API endpints created using flask. The implementation includes :

• The blockchain structure
• Proof of work algorithm
• Endpoint to make transactions
• Endpoint to mine blocks
• Consensus algorithm to resolve conflicts

Requirements

1. python 3.5+
2. pipenv
3. flask
4. requests

Run the server:

• pipenv run python blockchain.py -p 5001
• pipenv run python blockchain.py -p 5002

Endpoint

• 127.0.0.1:5000/nodes/resolve

{
    "chain": [
        {
            "index": 1,
            "previous_hash": "1",
            "proof": 100,
            "timestamp": 1567662531.29454,
            "transactions": []
        },
        {
            "index": 2,
            "previous_hash": "f320a6dac42a7e54ccbf97aa6ba9ea9d66cf02d79ea11918c8fdbc000a2619e5",
            "proof": 108178,
            "timestamp": 1567662840.2465315,
            "transactions": [
                {
                    "amount": 1,
                    "recipient": "2a0c758ae5de47b7b96338d26130b832",
                    "sender": "0"
                }
            ]
        },
        {
            "index": 3,
            "previous_hash": "dbf1211fb34b6c42da8b40b6c34fb15c472860411d1cff85e6a3a0beb9f6f43b",
            "proof": 84137,
            "timestamp": 1567662986.6913767,
            "transactions": [
                {
                    "amount": 1,
                    "recipient": "2a0c758ae5de47b7b96338d26130b832",
                    "sender": "0"
                }
            ]
        }
    ],
    "message": "Our chain is authoritative"
}```