Moralis JS SDK v1.0 (migration to Ethers.js)

How could I get the getSigner in react-moralis v1? is it something like below?

const { provider } = useMoralis()

const signer = provider.getSigner() // compile error in TS

I’ve checked the provider it’s the unknown type which is not friendly in TypeScript.

That should still work @Erno will check

They should still be working and not removed, the only thing that change is this one

I had changed the onAccountsChanged to onAccountChanged which stopped errors but none of the events were activating. I’ll play around and see if I can see what’s going on.

I see @Erno can probably take a look on this if there is really an issue on this :raised_hands:

The events are now fired differently. Before it was firing the Metamask onChain/onAccountsChanged events. Now it is firing the onChain/onAccountsChanged of the method that is used for authentication/enableWeb3.

So before you call authenticate/enableWeb3, no events will be fired. Then if you authenticate via Walletconnect, you will get events from WalletConnect.

I assume you use the events before enableWeb3/authenticate was called?

If so, then if you want to listen for Metamask events, you can use window.ethereum.on:

    window.ethereum.on("accountsChanged", (account) =>
    window.ethereum.on("chainChanged", (chain) =>

Correct, the provider can be any EIP1193 provider that is returned from Metamask/WalletConnect/etc., so that’s why we have it typed as unknown right now.

To get the signer, you need to use the instance of the Ethers web3. You can use something like:

  const { web3 } = useMoralis();

  useEffect(() => {
    if (web3) {
      const signer = (web3 as any).getSigner();
      console.log("signer", signer);
  }, [web3]);

Just noticed that we have no proper types for the returned web3, will look into that one to provide better types.

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My Dapp was working fine ; but now I get prompted with the following error ‘TypeError: Moralis.Web3.onAccountsChanged is not a function’. I updated npm install [email protected] and also npm install [email protected]. I believe this error is coming internally as I did not use Moralis.Web3.onAccountsChanged function on my Dapp or scripts.

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Will Moralis.Web3API remain available in the cloud functions after updating the server?

What version of react-moralis do you use?
If you upgraded moralis to v1.0 then you should also update react-moralis to v1.0

Those are my dependencies

"dependencies": {

    "@walletconnect/web3-provider": "^1.7.1",

    "axios": "^0.24.0",

    "install": "^0.13.0",

    "moralis": "^1.0.1",

    "next": "^12.0.8",

    "react": "^17.0.2",

    "react-dom": "^17.0.2",

    "react-moralis": "^0.3.11",

    "timeago-react": "^3.0.4"


So you need to update react-moralis as well to v1.0

@Erno could you please give me the commands on how to do so
. Thanks

Try npm install [email protected]

Thanks @Erno :muscle:

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yes, the server is not affected by this update

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Thank you very much !!! I confirm : i solved my current problem by reading this post.
I let my development project 2 days ago, working perfectly, and today when i relaunched everything i discovered tons of error in my browser console. I really started to be desperated (ahahah). But fortuntely, i have seen the youtube recent video on “Nitro” and then saw this post.

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Is there a way to just go back to how things were before the update? I cant figure out how to fix the breaks, I’m still new to coding.
I updated moralis and react-moralis. I’m not using any of the new features, I just want to go back.

You can just install the previous version: npm install [email protected]
And you can do the same for react-moralis: npm install [email protected]

1 Like

seems the moralis v1.0.1 and react-moralis v1 are still not compatible with react-scripts v5, it would be nice to make them working in together.

BREAKING CHANGE: webpack < 5 used to include polyfills for node.js core modules by default.
This is no longer the case. Verify if you need this module and configure a polyfill for it.

If you want to include a polyfill, you need to:
        - add a fallback 'resolve.fallback: { "stream": require.resolve("stream-browserify") }'
        - install 'stream-browserify'
If you don't want to include a polyfill, you can use an empty module like this:
        resolve.fallback: { "stream": false }
 @ ./node_modules/create-hash/browser.js 11:11-33
 @ ./node_modules/ethereumjs-util/dist/index.js 23:17-39
 @ ./node_modules/web3-provider-engine/index.js 5:16-42
 @ ./node_modules/@walletconnect/web3-provider/dist/esm/index.js 6:23-54
 @ ./node_modules/moralis/lib/browser/Web3Connector/WalletConnectWeb3Connector.js 158:54-93
 @ ./node_modules/moralis/lib/browser/MoralisWeb3.js 83:57-110
 @ ./node_modules/moralis/lib/browser/Parse.js 45:42-66
 @ ./node_modules/moralis/index.js 1:0-50
 @ ./node_modules/react-moralis/lib/index.esm.js 3:0-36 5335:11-24