Ethers.js: TypeError: Cannot read property 'from' of undefined when using BigNumber.from("1");

[andrewhong5297]

Hi, I'm getting the error above when running the following:

const { utils } = require("ethers");
console.log(utils.BigNumber.from(chg_number));

[zemse]

I think you are using ethers v4. In ethers v4, the method was ethers.utils.bigNumberify. Now it is recommended to upgrade to ethers v5.

In ethers v5, BigNumber moved to top

const { BigNumber } = require('ethers')
BigNumber.from(chg_number)

[andrewhong5297]

Hmmm is there a way to import * from ethers in es5?

[zemse]

import { ethers } from 'ethers'

This one works when u want to import everything

[ricmoo]

I think @zemse answered the OP, so I'm going to close this? If I'm mistaken though, please re-open.

Thanks! :)