Skip to main content
Join the official 2019 Python Developers SurveyStart the survey!

Implements chainpoint v2 proof of existence approach

Project description

Implementation for generating and validating blockchain proofs/receipts (for proof of existence). Currently it offers support only for Chainpoint v2 (<http://www.chainpoint.org/>) but it can be easily extended.

Note that it also validates that the merkleRoot is properly stored in the blockchain (testnet or mainnet).

In the future the library may incorporate other approaches like OpenTimestamps (<https://github.com/opentimestamps>).

Installation

$ pip install blockchain-proofs

Example usage

$ python

>>> from blockchain_proofs import ChainPointV2
>>> leafs = ['a', 'b', 'c']
>>> cp = ChainPointV2()
>>> cp.add_leaf(leafs, True)
>>> cp.make_tree()
>>> cp.get_leaf_count()
3
>>> cp.get_merkle_root()
'7075152d03a5cd92104887b476862778ec0c87be5c2fa1c0a90f87c49fad6eff'
>>> cp.get_receipt(0, "e8b4177a30c8af5dd5f33adbc530e8970b593af1001b322c289e60b4ce395e13")
{'type': 'ChainpointSHA256v2', 'targetHash': 'ca978112ca1bbdcafac231b39a23dc4da786eff8147c4e72b9807785afee48bb', 'anchors': [{'type': 'BTCOpReturn', 'sourceId': 'e8b4177a30c8af5dd5f33adbc530e8970b593af1001b322c289e60b4ce395e13'}], 'proof': [{'right': '3e23e8160039594a33894f6564e1b1348bbd7a0088d42c4acb73eeaed59c009d'}, {'right': '2e7d2c03a9507ae265ecf5b5356885a53393a2029d241394997265a1a25aefc6'}], '@context': 'https://w3id.org/chainpoint/v2', 'merkleRoot': '7075152d03a5cd92104887b476862778ec0c87be5c2fa1c0a90f87c49fad6eff'}

Project details


Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Files for blockchain-proofs, version 0.2.1
Filename, size File type Python version Upload date Hashes
Filename, size blockchain_proofs-0.2.1-py3-none-any.whl (6.4 kB) File type Wheel Python version py3 Upload date Hashes View hashes
Filename, size blockchain-proofs-0.2.1.tar.gz (4.2 kB) File type Source Python version None Upload date Hashes View hashes

Supported by

Elastic Elastic Search Pingdom Pingdom Monitoring Google Google BigQuery Sentry Sentry Error logging AWS AWS Cloud computing DataDog DataDog Monitoring Fastly Fastly CDN SignalFx SignalFx Supporter DigiCert DigiCert EV certificate StatusPage StatusPage Status page