chore(trading): add quantum formatting to deal ticket (#4030)

libs/utils/src/lib/format/number.spec.ts

@@ -2,6 +2,7 @@ import BigNumber from 'bignumber.js';
 
 import {
   addDecimalsFormatNumber,
+  addDecimalsFormatNumberQuantum,
   formatNumber,
   formatNumberPercentage,
   isNumeric,
@@ -23,6 +24,28 @@ describe('number utils', () => {
     }
   );
 
+  it.each([
+    { v: new BigNumber(123000), d: 5, o: '1.23', q: 0.1 },
+    { v: new BigNumber(123000), d: 3, o: '123.00', q: 0.1 },
+    { v: new BigNumber(123000), d: 1, o: '12,300.00', q: 0.1 },
+    { v: new BigNumber(123001000), d: 2, o: '1,230,010.00', q: 0.1 },
+    { v: new BigNumber(123001), d: 2, o: '1,230', q: 100 },
+    { v: new BigNumber(123001), d: 2, o: '1,230.01', q: 0.1 },
+    {
+      v: BigNumber('123456789123456789'),
+      d: 10,
+      o: '12,345,678.9123457',
+      q: '0.00003846',
+    },
+  ])(
+    'formats with addDecimalsFormatNumberQuantum given number correctly',
+    ({ v, d, o, q }) => {
+      expect(addDecimalsFormatNumberQuantum(v.toString(), d, q)).toStrictEqual(
+        o
+      );
+    }
+  );
+
   it.each([
     { v: new BigNumber(123), d: 3, o: '123.00' },
     { v: new BigNumber(123.123), d: 3, o: '123.123' },

libs/utils/src/lib/format/number.ts

@@ -90,6 +90,18 @@ export const formatNumberFixed = (
   return getFixedNumberFormat(formatDecimals).format(Number(rawValue));
 };
 
+export const addDecimalsFormatNumberQuantum = (
+  rawValue: string | number,
+  decimalPlaces: number,
+  quantum: number | string
+) => {
+  if (isNaN(Number(quantum))) {
+    return addDecimalsFormatNumber(rawValue, decimalPlaces);
+  }
+  const numberDP = Math.max(0, Math.log10(100 / Number(quantum)));
+  return addDecimalsFormatNumber(rawValue, decimalPlaces, Math.ceil(numberDP));
+};
+
 export const addDecimalsFormatNumber = (
   rawValue: string | number,
   decimalPlaces: number,