I know, I know, "why?" is the right response, but building a bitcoin ECDSA calculator in excel without using macros or array formulas was something I wanted to do
I made a spreadsheet that performs bitcoin's ECDSA calculation and now share with the community as a tool for learning more and diving into how the secp256k1 curve works
Is this the first time its been done? I haven't seen anything like it anywhere so I think this is the first. Happy to talk about the long process it took to get to this point
It is a pretty big spreadsheet (over 120MB), but it works from what I can tell. it takes that many MB just to make one point addition, so one has to copy/paste points to move around the curve (up to 255 times lol)
Fair warning--don't use it for holding bitcoin--this is why I didn't create the public key part (yet)
You can find it on my website:
https://modulo.network