alt Hacker News> The semantics for your string “10.00” are complex - is it considered equal to “10”?
Yes, but "10 USD" would be a non-canonical representation and you probably serialized incorrectly.
> To “10.000”?
Yes, but same caveat as above applies.
> To “10.001”?
Obviously not, and any system you'd ever want to use in a financial context will tell you so.
String and two-field exponent/mantissa representations are mostly the same in terms of semantics, yes. Making it two separate fields makes it less likely it would be put into `parseFloat`, but after doing some research I think strings are more popular in JSON [1, 2], so probably I’d stick to that as well.
[1]: https://msgspec.dev/supported-types#decimal
[2]: e.g. https://getlago.com/docs/api-reference/fees/fee-object#schem..., although they still use `amount_cents` for all currencies as the base rate