Error: Could not decode output data in Metamask Hardhat Local Blockchain

The “Error: could not decode output data” message is usually returned by the MetaMask library when an error occurs while decoding data from the Ethereum blockchain. In this case, we are using Hardhat to interact with the local blockchain instance, and we are encountering an issue with the Metamask library.

Step 1: Check the MetaMask library documentation

Before diving into the code, make sure you have reviewed the error message you are getting in the official MetaMask library documentation. In particular, check the [Error 2] section of the documentation, which explains that this error can occur when using the “encode” function to decode data from the Ethereum blockchain.

Step 2: Verify Hardhat settings

Hardhat requires a specific configuration to work with the local blockchain instance. Make sure you have configured Hardhat correctly:

const hardhat = require('hardhat');
module.exports = {
// ... other configurations ...
network: {
provider: '
ethersProvider: {
host: '127.0.0.1',
port: 8545,
gas: 2000000, // or a value that suits your configuration
gasPrice: 10,000, // Wei
maxGasLimit: 15000000, // in bytes
},
},
};

Step 3: Verify Ethereum blockchain data

Make sure you can retrieve Ethereum blockchain data without any problems. You can use the “console.log” function or a library like “ethers.js” to check the blockchain data:

const Web3 = require('web3');
const web3 = new Web3();
// Get the blockchain data from MetaMask
async function getBlockchainData() {
try {
const result = await web3.eth.blockNumber();
console.log(result);
return result;
} catch (error) {
console.error(error); // Result: "Error: Could not parse result data (value='0x', info={)"
}
}
getBlockchainData();

Step 4: Check the display

Now let’s focus on the display() function in the App.jsx file:

// display.js
import { display } from 'bsc-blocks';
export default function display() {
// Your display logic here
}
// main.js (where you use Display())
import React, { useState, useEffect } from 'react';
import display from './display';
function App() {
const [blockNumber, setBlockNumber] = useState(0);
useEffect(() => {
getBlockchainData();
return () => {
// Clear timers or events
};
}, []);
return (

Blockchain Number: {blockNumber}




Show Blockchain Data
);
}
Export default app;

In this example, we have added a “display” function that uses the “getBlockchainData()” function to retrieve and display Ethereum blockchain data.

Step 5: Test your code

Try running the code in a local development environment (e.g. Webpack Dev Server) or using a pre-built blockchain simulator like Hardhat Local Blockchain. If you continue to have issues, please provide more information about your setup and code, including any relevant error messages or configurations.

I hope this helps you resolve the Metamask issue on your local Hardhat blockchain!