Replace the input() calls in sandwiches that take input with neovim floating windows?

[IndianBoy42]

IMO using small floating windows anchored to the cursor is a better input method as we do not need to move our eyes to the bottom of the screen. I would like to change the builtin bun functions with one that uses such a floating window based interface. It is easy to program such an interface, but I am not sure how to use the same interface as input(). I do something similar here in my vim config for making a better interface for vim.lsp.buf.rename(). In this when i hit <CR> in the floating window it calls vim.lsp.buf.rename(<input>). So basically it works well when I can just call a function at the end of the input process to do the action. input() however is essentially a blocking call to vim to get some input, I don't know if some of the neovim async stuff could be used here to turn my callback based interface into a blocking style interface.
Is there anyone knowledgable in neovim who could help implement some floating window based input method for vim-sandwich or could guide me to making it?