ckbhash

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CKB uses blake2b as the default hash algorithm with following configurations:

• output digest size: 32
• personalization: ckb-default-hash

We'll use the name ckbhash to denote the blake2b hash with the configurations above.

Python 3 Example and test vectors:

import hashlib
import unittest

def ckbhash():
    return hashlib.blake2b(digest_size=32, person=b'ckb-default-hash')

class TestCKBBlake2b(unittest.TestCase):

    def test_empty_message(self):
        hasher = ckbhash()
        hasher.update(b'')
        self.assertEqual('44f4c69744d5f8c55d642062949dcae49bc4e7ef43d388c5a12f42b5633d163e', hasher.hexdigest())

if __name__ == '__main__':
    unittest.main()