logBNs.js

import {ethers} from 'ethers';
import {cloneDeepWith} from 'lodash';


export default function logBNs(arg) {

  function customizer(value) {
    if (Array.isArray(value)) {
      const arr = [];
      Object.keys(value).forEach(key => {
        arr[key] = cloneDeepWith(value[key], customizer);
      });
      return arr;
    }
  }
  arg = cloneDeepWith(arg, customizer);

  function convert(value) {
    if (Array.isArray(value)) {
      for (const key in value) {
        if (ethers.BigNumber.isBigNumber(value[key])) {
          value[key] = String(value[key]);
        }
        else {
          convert(value[key]);
        }
      }
    }
    else if (value instanceof Object) {
      for (const key in value) {
        if (ethers.BigNumber.isBigNumber(value[key])) {
          value[key] = String(value[key]);
        }
        else {
          const value1 = value[key];
          if (Array.isArray(value1)) {
            convert(value1);
          }
          else if (value1 instanceof Object) {
            convert(value1);
          }
        }
      }
    }
  }

  convert(arg);

  console.log(arg);
}