[SOLVED] Streams API get Error : Default instance of MoralisCore is not set

[vampiregrodon]

I got email Live Streams API today and so happy to implement new this feature.I follow sample code on Moralis Doc but got error :

{"name":"Moralis SDK Core Error","source":"server","message":"[C0008] Default instance of MoralisCore is not set","stack":"Moralis SDK Core Error: [C0008] Default instance of MoralisCore is not set\\n    at Function.MoralisCoreProvider.getDefault }

/api/addStream.js

My code :

import Moralis from 'moralis';
import { EvmChain } from "@moralisweb3/evm-utils";

Moralis.start({
  apiKey: process.env.MORALIS_API_KEY,
});

const stream = {
  chains: [EvmChain.GOERLI], // list of blockchains to monitor
  description: "monitor Bobs wallet", // your description
  tag: "bob", // give it a tag
  webhookUrl: "mystite.com", // webhook url to receive events,
}

How to fix issues? thanks for reading

[alex]

Which documentation page are you following? Which version of moralis are you using? What sort of app are you using e.g. Express, Next.js?

[vampiregrodon]

Link doc:

Using JS SDK

Use Moralis v1
Using Nextjs

[alex]

What is the exact version you’re using? It needs to be moralis e.g. 2.6.7, not moralis-v1 if that’s what you’re using.

[vampiregrodon]

“moralis”: “^1.11.0”,
“@moralisweb3/core”: “^2.6.7”,
“@moralisweb3/evm-api”: “^2.6.7”,
“@moralisweb3/evm-utils”: “^2.6.7”,

[alex]

You should be using moralis@2x. You can install the latest with npm install moralis or yarn add moralis.

[vampiregrodon]

I update to moralis@2x and mysite down with error :

error - TypeError: Cannot read properties of undefined (reading ‘getTokenBalances’)

[vampiregrodon]

react-moralis": “^1.4.0”.

I must update react-moralis ?

[alex]

In that case, as you are also using moralis-v1, you need to use these versions:

[email protected] 
[email protected]

The documentation you linked is for the 2.0 Node.js SDK which is a separate library - so if you want to use that in your Next.js app as well - you need to use [email protected].

So at the end you should have:

[email protected] 
[email protected]

[email protected]
// along with the rest - evm-api/evm-utils

[vampiregrodon]

I changed

My site comeback but still got same error Stream API:

{"name":"Moralis SDK Core Error","source":"server","message":"[C0006] Request failed}

[alex]

It looks like you were trying to use Next.js API, what is your full Next.js API code including your handler?

[vampiregrodon]

Yes, I use NextJS

My code :

import md5 from 'md5';
import Moralis from 'moralis';
import {EvmChain} from '@moralisweb3/evm-utils';

export default async function handler(req, res) {
  const body = req.body;
  let token = req.headers.token;

  const hash = md5(JSON.stringify(body) + '|' + process.env.NEXT_PUBLIC_API_KEY);

  if (!token && token !== hash) {
    return res.status(401).json({error: 0, message: 'You are unauthorized to make this request'});
  }

  switch (req.method) {
    case 'POST':
      Moralis.start({
        apiKey: process.env.NEXT_PUBLIC_MORALIS_STREAM_API_KEY,
      });

      const stream = {
        chains: [EvmChain.GOERLI], // list of blockchains to monitor
        description: 'monitor custom lofi wallet', // your description
        tag: 'lofi', // give it a tag
        webhookUrl: process.env.NEXT_PUBLIC_URL + '/api/webhook', // webhook url to receive events,
      };

      const newStream = await Moralis.Streams.add(stream);
      const {id} = newStream.toJSON(); // { id: 'YOUR_STREAM_ID', ...newStream }

      // Now we attach bobs address to the stream
      const address = body.address;
      const result = await Moralis.Streams.addAddress({address, id});

      console.log('body', result);
      res.status(200).json({error: 1, message: 'Successfully'});

      break;
    case 'GET':
      res.status(405).send({message: 'Only POST requests allowed'});
  }
}

[vampiregrodon]

Hi bro, I got it. Worked now :).

I got error:

And I change code:

Need param includeNativeTxs . You missing in sample code

Thanks for support Glad

[alex]

Thanks that has been added in that example.

[coder]

I’m not seeing what solved the original Default instance . . . issue.

I’ve tried it in a NextJS environment as well as a newly minted npm init setup and I still receive Default instance of MoralisCore is not set.

Attempting the example EXACTLY as posted here I end up with Moralis.start is not a function

[YosephKS]

Hey @coder,

can you create a new thread in forum and show how does your code looks like?

Will be closing this thread as this is a separate solved thread.

Thanks!