{"id":21170203,"url":"https://github.com/dcarpintero/py-bck","last_synced_at":"2025-03-14T17:24:39.789Z","repository":{"id":142421196,"uuid":"266081877","full_name":"dcarpintero/py-bck","owner":"dcarpintero","description":"Blockchain implementation in Python","archived":false,"fork":false,"pushed_at":"2024-07-16T08:05:47.000Z","size":55,"stargazers_count":0,"open_issues_count":12,"forks_count":0,"subscribers_count":2,"default_branch":"master","last_synced_at":"2025-01-21T10:50:59.909Z","etag":null,"topics":["blockchain","hashcash","proof-of-work","python","sha256"],"latest_commit_sha":null,"homepage":"","language":"Python","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"mit","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/dcarpintero.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":"LICENSE","code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null}},"created_at":"2020-05-22T10:21:35.000Z","updated_at":"2023-09-15T20:22:21.000Z","dependencies_parsed_at":null,"dependency_job_id":"407eac69-bcb4-4b1e-9b63-3494fb96a9e1","html_url":"https://github.com/dcarpintero/py-bck","commit_stats":null,"previous_names":[],"tags_count":1,"template":false,"template_full_name":null,"repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/dcarpintero%2Fpy-bck","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/dcarpintero%2Fpy-bck/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/dcarpintero%2Fpy-bck/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/dcarpintero%2Fpy-bck/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/dcarpintero","download_url":"https://codeload.github.com/dcarpintero/py-bck/tar.gz/refs/heads/master","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":243616733,"owners_count":20319950,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["blockchain","hashcash","proof-of-work","python","sha256"],"created_at":"2024-11-20T15:57:08.191Z","updated_at":"2025-03-14T17:24:39.769Z","avatar_url":"https://github.com/dcarpintero.png","language":"Python","readme":"## PY-BCK\n\nA naive blockchain implementation in Python. Consensus is based on proof-of-work as in the\n[Bitcoin](https://nakamotoinstitute.org/static/docs/bitcoin.pdf \"Bitcoin: A Peer-to-Peer Electronic Cash System; S. Nakamoto; October 31, 2008\") and\n[Hashcash](http://www.hashcash.org/hashcash.pdf \"Hashcash - A Denial of Service Counter-Measure; A. Back; 2002\") implementations.\n\nThe chain is represented as an ordered back-linked list starting with the genesis block at the root.\nEach block is identified by a hash, generated using the SHA256 algorithm on its block header which consists of the following metadata:\n\n- its position in the blockchain (height).\n- a reference to the hash of the previous (parent) block in the chain.\n- a cryptographic hash of the root of the Merkle-Tree.\n- the approximate creation time of the block (seconds from Unix Epoch).\n- a unique answer to a difficult-to-solve mathematical puzzle (CPU cost function).\n\n[![Build Status](https://travis-ci.com/dcarpintero/py-bck.svg?branch=dev)](https://travis-ci.com/github/dcarpintero/py-bck)\n[![codecov](https://codecov.io/gh/dcarpintero/py-bck/branch/dev/graph/badge.svg)](https://codecov.io/gh/dcarpintero/py-bck)\n[![CodeFactor](https://img.shields.io/codefactor/grade/github/dcarpintero/py-bck)](https://www.codefactor.io/repository/github/dcarpintero/py-bck)\n[![License](https://img.shields.io/github/license/dcarpintero/py-bck)](https://github.com/dcarpintero/py-bck/blob/master/LICENSE)\n","funding_links":[],"categories":[],"sub_categories":[],"project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fdcarpintero%2Fpy-bck","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fdcarpintero%2Fpy-bck","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fdcarpintero%2Fpy-bck/lists"}