blockchain-proofs
Readme
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).
$ pip install blockchain-proofs
$ 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'}
FAQs
Implements chainpoint v2 proof of existence approach
We found that blockchain-proofs demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 1 open source maintainer collaborating on the project.
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