Hash¶
Assets are identified by their base58 encoded hash. Momotor uses the multihash format for these hashes to support multiple hashing algorithms.
The multihash format allows to easily upgrade the hashing function in the future and only uses hashing algorithms both client and server can support.
For short content (less than MAX_IDENTITY_LENGTH bytes),
the content itself is encoded as a identity hash.
Functions¶
- momotor.rpc.hash.funcs.get_algorithm_by_code(code)¶
Get a PEP 452 compatible hashing object by its multihash code or name
- momotor.rpc.hash.funcs.get_code_by_hash_obj(hash_obj)¶
Get the multihash code for a PEP 452 compatible hashing object
- Parameters
hash_obj – PEP 452 compatible hashing object
- Return type
- Returns
Identity hash¶
A PEP 452 compatible implementation of an identity hashing object.
The identity hash stores the literal content as a hash:
>>> IdentityHash(b'any random data').digest() == b'any random data'
True
- class momotor.rpc.hash.identity.IdentityHash(data=None)¶
- name = 'identity'¶
identifier for the hashing function
- update(data)¶
Extend the hash with data
- Parameters
data (
bytes) – data to concatenate to the existing data
- hexdigest()¶
Get the current data as hex-encoded digest
- Return type
- Returns
the hex-encoded current data
- copy()¶
Create a copy of this hash object
- Return type
- Returns
Copy of the object
- property digest_size¶
- property block_size¶
- momotor.rpc.hash.identity.new(data=None)¶
Create a identity hash object
- Parameters
data (
Union[bytes,memoryview,None]) – initial data for the hash- Return type
- Returns
the identity hash object
- momotor.rpc.hash.identity.digest_size = None¶
Digest size is variable