Production build error: Can't convert a BigInt value to a number

[djimenezdev]

Hey everyone! So I am using this library to generate the signature for a meta gasless transaction for a mini game I building. And it works perfectly on localhost but when I generate the build folder and use the serve library to run this build folder on a local server I get this Cannot convert a BigInt value to a number error as seen below:

I also get some warnings when I run the react app using the start command provided by the react-app. I don't know if they have anything to do with it but I'll show a few I am getting below

Also the react app is built with create-react-app and is using react version ^18.2.0

[djimenezdev]

I created a fresh react-app only installing the @metamask/eth-sig-util lib and I simply just import the signTypedData function without even implementing it and I get that exact same error just like in my actual project I am building

[nenadV91]

I've faced the same issue

[keithchew]

Hi

You might want to take a look at:

#298

to see if pinning to v4.0.1 helps.

[legobeat]

@djimenezdev @nenadV91 Would you be able to try either of v6.0.2 or v7.0.1 and see if the issue persists?

Note that in general, many BigNumber instances are not safe to call toNumber() on since JavaScript number can not fit some values. In particular, users should ensure they aren't using older versions of web3, which are affected by this.

If you are a web3.js user,

• The issue should be fixed in web3@4.x.
• Users still stuck on web3@1.x have a workaround available from web3@1.9.0.