Using coin flips as 11-bit bip39 wordlist indices

mnemonic_generation.py

def get_mnemonic_from_coin_flip_indices(coin_flips: str, wordlist_language_code: str = SettingsConstants.WORDLIST_LANGUAGE__ENGLISH) -> list[str]:
    """
        Interprets a string of 128 or 256 0s and 1s as 11-bit bip39 wordlist indices and
        returns the 12- or 24-word mnemonic.

        Indices are 0-based (i.e. b'00000000000' == 0000 == "abandon")

        Verify with iancoleman.io/bip39 using:
            * "Binary" mode
            * "Mnemonic Length" = "Use raw entropy"
    """
    if len(coin_flips) not in [128, 256]:
        raise Exception("Coin flip string must be 128 or 256 bits")

    # convert bit string to bytes
    coin_flip_bytes = bytearray()
    for i in range(0, len(coin_flips), 8):
        # convert 8 bits to an integer
        index = int(coin_flips[i:i + 8], 2)
        # convert the index to a byte
        coin_flip_bytes.append(index)

    # Convert the indices to their associated words. The final word will consist of the
    # last bits of the provided entropy plus the checksum which will be automatically
    # added by the method below.
    return bip39.mnemonic_from_bytes(coin_flip_bytes, wordlist=Seed.get_wordlist(wordlist_language_code)).split()