Decimal Maths (e.g. division with fractional components)

[jotto]

Does anyone have any tips/tricks for using ethers' existing BigNumber functionality for decimal division?

Something like

const eth = ethers.utils.parseUnits(`1.5`, 18);
const gwei = ethers.utils.parseUnits(`0.3`, 9);

gwei.div(eth) // returns 0, but ideally returns 0.2

[ricmoo]

You can use the FixedNumber class for this:

a = FixedNumber.from("1.5");
b = FixedNumber.from("0.3");
b.divUnsafe(a).toString();

The BigNumber class is specifically for integers, while the fixed point math allows you to specify a format (by default "fixed128x18", which should suffice for most purposes).

Does that help?

[jotto]

Wow. I've stared at your documentation for months, but somehow I missed this. Thank you.

Great library BTW.