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