https://github.com/dcarpintero/py-bck

Blockchain implementation in Python
https://github.com/dcarpintero/py-bck

blockchain hashcash proof-of-work python sha256

Last synced: 4 months ago
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Blockchain implementation in Python

• Host: GitHub
• URL: https://github.com/dcarpintero/py-bck
• Owner: dcarpintero
• License: mit
• Created: 2020-05-22T10:21:35.000Z (about 5 years ago)
• Default Branch: master
• Last Pushed: 2024-07-16T08:05:47.000Z (12 months ago)
• Last Synced: 2025-01-21T10:50:59.909Z (6 months ago)
• Topics: blockchain, hashcash, proof-of-work, python, sha256
• Language: Python
• Homepage:
• Size: 53.7 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 12
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
## PY-BCK

A naive blockchain implementation in Python. Consensus is based on proof-of-work as in the

[Bitcoin](https://nakamotoinstitute.org/static/docs/bitcoin.pdf "Bitcoin: A Peer-to-Peer Electronic Cash System; S. Nakamoto; October 31, 2008") and

[Hashcash](http://www.hashcash.org/hashcash.pdf "Hashcash - A Denial of Service Counter-Measure; A. Back; 2002") implementations.

The chain is represented as an ordered back-linked list starting with the genesis block at the root.

Each block is identified by a hash, generated using the SHA256 algorithm on its block header which consists of the following metadata:

- its position in the blockchain (height).

- a reference to the hash of the previous (parent) block in the chain.

- a cryptographic hash of the root of the Merkle-Tree.

- the approximate creation time of the block (seconds from Unix Epoch).

- a unique answer to a difficult-to-solve mathematical puzzle (CPU cost function).

[![Build Status](https://travis-ci.com/dcarpintero/py-bck.svg?branch=dev)](https://travis-ci.com/github/dcarpintero/py-bck)

[![codecov](https://codecov.io/gh/dcarpintero/py-bck/branch/dev/graph/badge.svg)](https://codecov.io/gh/dcarpintero/py-bck)

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