def trueDummy(tx):
    scriptSig = CScript(tx.vin[0].scriptSig)
    newscript = []
    for i in scriptSig:
        if len(newscript) == 0:
            assert len(i) == 0
            newscript.append(b'\x51')
        else:
            newscript.append(i)
    tx.vin[0].scriptSig = CScript(newscript)
    tx.rehash()