def encode(self, encoding=None):
r"""Encode into a multihash-encoded digest.
If `encoding` is `None`, a binary digest is produced:
>>> mh = Multihash(0x01, b'TEST')
>>> mh.encode()
b'\x01\x04TEST'
If the name of an `encoding` is specified, it is used to encode the
binary digest before returning it (see `CodecReg` for supported
codecs).
>>> mh.encode('base64')
b'AQRURVNU'
If the `encoding` is not available, a `KeyError` is raised.
"""
try:
fc = self.func.value
except AttributeError: # application-specific function code
fc = self.func
mhash = bytes([fc, len(self.digest)]) + self.digest
if encoding:
mhash = CodecReg.get_encoder(encoding)(mhash)
return mhash
def encode(self, encoding=None):
r"""Encode into a multihash-encoded digest.
If `encoding` is `None`, a binary digest is produced:
>>> mh = Multihash(0x01, b'TEST')
>>> mh.encode()
b'\x01\x04TEST'
If the name of an `encoding` is specified, it is used to encode the
binary digest before returning it (see `CodecReg` for supported
codecs).
>>> mh.encode('base64')
b'AQRURVNU'
If the `encoding` is not available, a `KeyError` is raised.
"""
try:
fc = self.func.value
except AttributeError: # application-specific function code
fc = self.func
mhash = fc.to_bytes((fc.bit_length() + 7) // 8, 'big') + bytes([len(self.digest)]) + self.digest
if encoding:
mhash = CodecReg.get_encoder(encoding)(mhash)
return mhash
