Here is an article with a solution to the frequency error that occurs when building a web app using React and Solidity.

Error: Frequency error when building a React web app using Blockchain and Truffle

When developing a blockchain-based web app using React and Truffle, one common issue that can occur is a “frequency error” or “loop error”. This occurs when a JavaScript event loop gets stuck, causing the application to hang or crash.

Problem:

In your React app, you may be using Web3 and Ganache for local development, which works fine with Truffle. However, when you deploy a contract on the Ethereum network and start interacting with it, the frequency error can occur for several reasons:

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

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

Solution:

To resolve this frequency error issue, you need to take two main steps:

• 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 native Ganache.

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

Here is an updated code example that shows how to fix these 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 (like Ganache Cloud or Triffle Cloud)
const ganacheInstance = new Web3.Ganache({
host: " // or your local IP
});
// Initialize a Web3 instance and set up an event emitter
const web3 = new Web3(ganacheInstance);
const emitter = new web3.EventEmitter();
function App() {
const [ account , setAccount ] = useState ( '' ) ;
useEffect(() => {
// Set the account using the Truffle Web3 API
const contractAddress = '0x...'; // your contract address
emitter.on('contractAddress', (newContractAddress) => {
setAccount ( newContractAddress ) ;
});
return () => {
// Cleanup when detaching the component
emitter.off('contractaddress');
};
}, []);
if ( ! account ) {
// Handle error: frequency error in React app
console.error('Account not found! Please refresh the page or update the contract address.');
return < div > Account not found Refresh to try again.