PixelCircuits

So currently, not many reproduction carts are supported. I think the InsideGadgets gameboy carts may work, but I don't think any of the GBA carts have been tested. Do you...

This would be better suited as an intent standard for ERC-7521 rather than being baked into the entrypoint itself. This way it's up to users to opt in and include...

I think it makes the most sense to write an example intent standard contract and add it [here](https://github.com/essential-contributions/ERC-7521/tree/master/src/standards). At least one that whitelists a solver by checking `msg.origin`.