why can't expMonth and expYear be number instead of bigint ?

[rawatnaresh]

All I'm trying to do it return the response from cardsApi

const data = await cardsApi.createCard({
    ...
});
...
return res.status(200).json({ card: data.result.card });

But I'm getting an error because expMonth and expYear are bigint

[wolfadex]

Hi @rawatnaresh I can definitely see this being an issue. The short answer is because those fields are 64 bit Integers (see here in the docs). I will see what I can do to make this a better experience.

For a more immediate solution I'd recommend checking out #24 (comment) as it notes the more general issue of values that are BigInt and how to handle sending them over http.