def __EntropyBytesFromBinaryStr(self, mnemonic_bin_str: str) -> bytes:
"""
Get entropy bytes from mnemonic binary string.
Args:
mnemonic_bin_str (str): Mnemonic binary string
Returns:
bytes: Entropy bytes
"""
# Get checksum length
checksum_len = self.__GetChecksumLen(mnemonic_bin_str)
# Get back entropy binary string
entropy_bin_str = mnemonic_bin_str[:-checksum_len]
# Get entropy bytes from binary string
return BytesUtils.FromBinaryStr(entropy_bin_str, checksum_len * 8)
def DecodeWithChecksum(self, mnemonic: Union[str, Mnemonic]) -> bytes:
"""
Decode a mnemonic phrase to bytes (with checksum).
Args:
mnemonic (str or Mnemonic object): Mnemonic
Returns:
bytes: Decoded bytes (with checksum)
Raises:
MnemonicChecksumError: If checksum is not valid
ValueError: If mnemonic is not valid
"""
mnemonic_bin_str = self.__DecodeAndVerifyBinaryStr(mnemonic)
# Compute pad bit length
mnemonic_bit_len = len(mnemonic_bin_str)
pad_bit_len = (mnemonic_bit_len if mnemonic_bit_len %
8 == 0 else mnemonic_bit_len +
(8 - mnemonic_bit_len % 8))
return BytesUtils.FromBinaryStr(mnemonic_bin_str, pad_bit_len // 4)