@yoroi/common/lib/module/numbers/atomic-to-decimal.js

The Common package of Yoroi SDK

import { BigNumber } from 'bignumber.js';
const pattern = /\d+/g;

/**
 * Converts an atomic value to its decimal representation.
 *
 * @param {Object} options - The options for the conversion.
 * @param {string} options.value - The atomic value to convert,
 * exponential e.g 1e+4 will result in 14, only numbers are taken, negative sign is ignored.
 * @param {number} options.decimals - The number of decimal places (positive), it will round down (BigNumber.ROUND_DOWN).
 *
 * @returns {BigNumber} The decimal representation from the atomic value.
 */
export function atomicToDecimal(_ref) {
  let {
    value,
    decimals
  } = _ref;
  const matches = value.toString().match(pattern);
  if (!matches) return new BigNumber(0);
  const combinedNumberString = matches.join('');
  const bn = new BigNumber(combinedNumberString);
  return bn.shiftedBy(-decimals).decimalPlaces(Math.abs(decimals), BigNumber.ROUND_DOWN);
}
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