vega-frontend-monorepo/apps/trading/components/fees-container/utils.ts
m.ray 614a83b7d6
chore(trading): merge main back in develop (fees discounts, discount stats from prev epoch) (#5415)
Co-authored-by: Bartłomiej Głownia <bglownia@gmail.com>
Co-authored-by: asiaznik <artur@vegaprotocol.io>
2023-12-01 17:03:41 +00:00

43 lines
1.5 KiB
TypeScript

import { getUserLocale } from '@vegaprotocol/utils';
import BigNumber from 'bignumber.js';
/**
* Convert a number between 0-1 into a percentage value between 0-100
*
* Not using formatNumberPercentage from vegaprotocol/utils as this
* returns a string and includes extra 0s on the end. We need these
* values in aggrid as numbers for sorting
*/
export const formatPercentage = (num: number) => {
const pct = new BigNumber(num).times(100);
const dps = pct.decimalPlaces();
const formatter = new Intl.NumberFormat(getUserLocale(), {
// set to 0 in order to remove the "trailing zeroes" for numbers such as:
// 0.123456789 -non-zero-min-> 12.3456800% -zero-min-> 12.34568%
minimumFractionDigits: 0,
maximumFractionDigits: dps || 0,
});
return formatter.format(parseFloat(pct.toFixed(5)));
};
/**
* Given a set of fees and a set of discounts return
* the adjusted fee factor
*
* Formula for calculating the adjusted fees
* total_discount_factor = 1 - (1 - volumeDiscount) * (1 - referralDiscount)
*/
export const getAdjustedFee = (fees: BigNumber[], discounts: BigNumber[]) => {
const totalFee = fees.reduce((sum, f) => sum.plus(f), new BigNumber(0));
const combinedFactors = discounts.reduce((acc, d) => {
return acc.times(new BigNumber(1).minus(d));
}, new BigNumber(1));
const totalFactor = new BigNumber(1).minus(combinedFactors);
return totalFee
.times(new BigNumber(1).minus(BigNumber.max(0, totalFactor)))
.toNumber();
};