What does it mean” Haha cool” from a guy as a response to a request?

I texted my crush a question to ask the meaning of something. I told him that I tried looking it up and asking others, but I felt that he would be the right person to ask. His response was: “ Haha cool,” then he provided his answer. Is he trying to say it’s cool to ask me? Or was he excited that I’ve asked him.

What does it mean” Haha cool” from a guy as a response to a request?
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