How to represent money amounts safely and exactly in Golang?

[UTKARSH_TYAGI]

For this issue, i found something here :

What is the proper golang equivalent to Decimal when dealing with money?

Theres the various floats, including the new one in big. But “conventional” wisdom tells you to always avoid floats when trying to represent money. What is the proper go solution to this? You can of course use the Rational struct (Rat) to represent decimal values in the form of fractions, which you can use to parse things like scientific notation into a Rational representation. But what is the “right” way to handle money in go?

My problem statement is : I need to store money values exact up to 2 decimal places.
Representing in whole cents (int64) seems to be an option. Can someone share if there is any other way to deal with money values in golang? maybe, a reliable datatype alternative.
Thanks

[eudore]

Money must be stored using integers. Using the float type may cause a loss of accuracy after a long run, then you will lose a few cents.

[skillian (Sean Killian)]

Disclaimer: I haven’t yet used Go for currency calculation. I haven’t thought hard about this problem.

What about thinking of currency like how time.Duration is implemented? Something like this: https://play.golang.org/p/Woe8FnVz6LE

[UTKARSH_TYAGI]

Thanks for reply.
I get it yes float is not an option, esp. where bigger transactions are involved.
I was looking into some better substitute to using integer

[UTKARSH_TYAGI]

@skillian Thanks for the lead. I’ll look into it and try to see how well it goes