I see that many different altcoins have different lengths for the initial genesis tx. How would I go about finding the length of the initial genesis tx? I saw another answer but I have no need of making it as complicated; I just need the length and nothing else.
For example, Bitcoin's is
However, altcoins have different lengths. Is there an identifier I can use to determine the length of the genesis tx and nothing else?
EDIT: I am making a block explorer so I cannot use a block explorer to help me in getting info.