@yoroi/common/lib/module/numbers/atomic-breakdown.js

The Common package of Yoroi SDK

import BigNumber from 'bignumber.js';
import { freeze } from 'immer';
export function atomicBreakdown(bigInt, decimalPlaces) {
  const scale = BigInt(10) ** BigInt(decimalPlaces);
  const isNegative = bigInt < 0;
  const sign = isNegative ? '-' : '';
  const signAdjust = isNegative ? -1n : 1n;
  const absoluteBigInt = signAdjust * bigInt;
  const integer = (absoluteBigInt / scale).toString();
  const fraction = decimalPlaces > 0 ? (absoluteBigInt % scale).toString().padStart(decimalPlaces, '0') : '';
  const separator = decimalPlaces > 0 ? '.' : '';
  const str = `${sign}${integer}${separator}${fraction}`;
  const bn = new BigNumber(str);
  return freeze({
    decimalPlaces,
    bi: bigInt,
    integer,
    fraction,
    bn,
    str
  });
}
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