INNER CODE UNIT · Python

segwit_decode

bee-san/pyWhat · pywhat/bitcoin.py:96

def segwit_decode(address: str) -> Optional[Tuple[str, int, bytes]]:
    """
    The human-readable part, the witness version and the witness program of a
    SegWit address, or None if it is not one (BIP 173 and BIP 350).
    """
    if len(address) > 90 or any(not 33 <= ord(char) <= 126 for char in address):
        return None
    if address.lower() != address and address.upper() != address:
        return None  # mixed case
    hrp, separator, data_part = address.lower().rpartition("1")
    # At least a witness version and the 6 characters of the checksum
    if not separator or not hrp or len(data_part) < 7:
        return None
    if any(char not in BECH32_CHARSET for char in data_part):
        return None
    data = [BECH32_CHARSET.index(char) for char in data_part]
    version = data[0]
    if version > 16:

View source record →