Here is an article that provides a solution to the frequency error you are experiencing when building a web application using React and Solidity:

Error: Frequency error when building a React web application with Blockchain and Truffle

When developing a blockchain-based web application using React and Truffle, one of the common issues is the “frequency error” or “loop error”. This occurs when the JavaScript event loop gets stuck, causing the application to freeze or crash.

The problem:

In your React application, you are probably using Web3 and Ganache for local development, which works fine with Truffle. However, when you deploy your contract to the Ethereum network and start interacting with it, the frequency error can occur for several reasons:

• Ganache: When you run Ganache locally on your machine, it uses a sandbox environment that may not accurately simulate real blockchain traffic. This can cause issues with event handling and synchronization.

• Truffle: Truffle is designed for development purposes only; it does not handle the complexities of the blockchain network as effectively as Web3 or other libraries such as Ethers.js.

The Solution:

There are two main steps you need to take to resolve the frequency error:

• Use a more robust Ganache setup: Consider using a cloud-based Ganache instance that mimics the conditions of the Ethereum network, such as:

• Ganache Cloud

  : A hosted version of Ganache that provides a stable and scalable environment for development.

• Truffle Cloud: A Truffle-specific solution that offers a similar experience to on-premises Ganache.

• Implement the Web3 “eventEmitter”: Instead of relying on React’s event handling, use Web3’s built-in EventEmitter API to handle events and updates. This helps decouple React components from the Ethereum blockchain and avoid the frequency error.

Here is an updated code example that demonstrates how to resolve the issues:

import React, { useState, useEffect } from 'react';
import Web3 from 'web3';
import { BrowserRouter as Router, Routes, Route, Link } from 'react-router-dom';
// Use a more robust Ganache setup (e.g. Ganache Cloud or Truffle Cloud)
const ganacheInstance = new Web3.Ganache({
host: " // or your local IP
});
// Initialize the Web3 instance and set up the event emitter
const web3 = new Web3(ganacheInstance);
const emitter = new web3.EventEmitter();
function App() {
const [account, setAccount] = useState('');
useEffect(() => {
// Set the account using Truffle's Web3 API
const contractAddress = '0x...'; // contract address
emitter.on('contractAddress', (newContractAddress) => {
setAccount(newContractAddress);
});
return () => {
// Cleanup on component detachment
emitter.off('contractAddress');
};
}, []);
if (!account) {
// Handling error: frequency error in React
console.error('Account not found! Please refresh the page or update your contract address.');
return 
Account not found. Refresh to try again.
;
}
return (

Hello, world!
Contract address: {account}
);
}
// Update Truffle configuration to use the Web3 EventEmitter API
module.exports = {
// ...
network: {
provider: ganacheInstance,
events: ['contractAddress'],
},
};

In this updated example, we’ve replaced React’s event handling with Web3’s “EventEmitter” API. We’re using Ganache Cloud to simulate a real Ethereum environment and set up a Web3 instance before we render our application. When interacting with our contract, we’ll use Truffle’s Web3 API to handle events and updates.

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