Skip to content

A chainpoint (v2) implementation for generating and validating blockchain receipts (for proof of existence)

License

Notifications You must be signed in to change notification settings

karask/blockchain-proofs

Folders and files

NameName
Last commit message
Last commit date

Latest commit

 

History

15 Commits
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Repository files navigation

blockchain-proofs

Implementation for generating and validating blockchain proofs/receipts (for proof of existence). Currently it offers support only for Chainpoint v2 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.

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'}

About

A chainpoint (v2) implementation for generating and validating blockchain receipts (for proof of existence)

Resources

License

Stars

Watchers

Forks

Packages

No packages published

Languages