Make the redeem script for a p2sh-p2wsh witness script

def btc_make_p2sh_p2wsh_redeem_script( witness_script_hex ):
    """
    Make the redeem script for a p2sh-p2wsh witness script
    """
    witness_script_hash = hashing.bin_sha256(witness_script_hex.decode('hex')).encode('hex')
    redeem_script = btc_script_serialize(['0020' + witness_script_hash])
    return redeem_script