I understand what you are talking about here, but I have a question regarding the actual _mint call. Where you make the call:
_mint(msg.sender, GOLD, 10**18, “”);
or the general case:
_mint(address account, uint256 id, uint256 amount, bytes data)
My question is, what is data for? What can you put in between the quotes in your example?
I would really appreciate any help you can give me…