lnaddr.py 文件源码

def encode_fallback(fallback, currency):
    """ Encode all supported fallback addresses.
    """
    if currency == 'bc' or currency == 'tb':
        fbhrp, witness = bech32_decode(fallback)
        if fbhrp:
            if fbhrp != currency:
                raise ValueError("Not a bech32 address for this currency")
            wver = witness[0]
            if wver > 16:
                raise ValueError("Invalid witness version {}".format(witness[0]))
            wprog = u5_to_bitarray(witness[1:])
        else:
            addr = base58.b58decode_check(fallback)
            if is_p2pkh(currency, addr[0]):
                wver = 17
            elif is_p2sh(currency, addr[0]):
                wver = 18
            else:
                raise ValueError("Unknown address type for {}".format(currency))
            wprog = addr[1:]
        return tagged('f', bitstring.pack("uint:5", wver) + wprog)
    else:
        raise NotImplementedError("Support for currency {} not implemented".format(currency))