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Simple Blockchain Implementation in Python

This is a basic implementation of a blockchain in Python. It includes classes for creating blocks and a blockchain, as well as functions for generating hashes using SHA-256.

Features

  • Block Generation: Blocks are created with data, a hash, and a reference to the previous block's hash.
  • Blockchain Creation: The blockchain is initialized with a genesis block.
  • Adding Blocks: New blocks can be added to the blockchain, each referencing the hash of the previous block.
  • Hashing: SHA-256 hashing is used to generate hashes for blocks.

Usage

To use this implementation, simply include the blockchain.py file in your project and follow these steps:

  1. Initialize Blockchain: Create an instance of MyBlockchain to initialize the blockchain with a genesis block.
  2. Add Blocks: Use the add_block method to add new blocks to the blockchain.
blch = MyBlockchain()
blch.add_block('Data for Block 1')
blch.add_block('Data for Block 2')
# Add more blocks as needed

Access Blockchain

To access individual blocks and their properties, you can iterate over the chain attribute of the blockchain.

for block in blch.chain:
    print(block.__dict__)

Example

Here's an example of how blocks are structured:

{
    'data': 'Data for Block 1',
    'hash': 'Hash of Block 1',
    'prev_hash': 'Hash of Previous Block'
}

Requirements

  • Python 3.x

Contributing

Contributions are welcome! If you find any bugs or have suggestions for improvements, feel free to open an issue or submit a pull request.

You can paste this content directly into your README.md file on GitHub. Let me know if you need any further assistance!