Metamask: Troubleshooting Chain ID in WalletConnect
When connecting your dApp to a WalletConnect instance, you’re likely expecting events and functions to be triggered when a user interacts with your application’s code on the wallet. However, after changing the chain on WalletConnect’s wallet, these interactions seem to be ignored. In this article, we’ll explore ways to troubleshoot and resolve this issue.
The Issue
When the user selects their account address and chain ID in WalletConnect, they expect the dApp to receive events or functions that trigger when a specific chain is selected. However, after changing the chain on WalletConnect’s wallet, the interactions appear to be lost. This can lead to unexpected behavior, confusion among users, and potentially even security issues.
Causes of the Problem
There are several reasons why this might happen:
- Chain ID not being updated: When you change the chain on WalletConnect’s wallet, it may take a few seconds for the chain ID to be updated in your dApp.
- WalletConnect library not properly handling changes: The WalletConnect JavaScript library is not designed to handle long-running operations like updating chains. It may exit early or fail to update the chain ID correctly.
- DApp code not listening for events: Your dApp’s code may not be configured to listen for events on the selected chain, or it may not have been updated properly after changing the chain.
Troubleshooting Steps
To resolve this issue and ensure that your dApp receives events and functions when a user interacts with WalletConnect on their account address and chain ID, follow these steps:
1. Check the WalletConnect library version
Ensure that you’re using the latest version of the WalletConnect JavaScript library. You can check for updates in the official WalletConnect documentation or by checking your dApp’s codebase.
2. Update dApp code to listen for events on the selected chain
Make sure that your dApp’s code is listening for events on the selected chain using the walletconnect event listeners:
// Assuming you're using the following library
const walletConnect = require('walletconnect');
const connection = new walletConnect.Connection({
// Your account address and chain ID as strings
account: '0x...',
chainId: '...'.
});
connection.on('chainChanged', (newChain) => {
console.log(Chain changed to ${newChain});
});
3. Wait for the chain ID update
After changing the chain on WalletConnect’s wallet, wait for a few seconds for the chain ID to be updated in your dApp. This should give enough time for the library to catch up with the change.
4. Verify event listeners are set correctly
Double-check that your walletconnect instance has all required event listeners set:
const walletConnect = require('walletconnect');
const connection = new walletConnect.Connection({
// Your account address and chain ID as strings
account: '0x...',
chainId: '...'.
});
connection.on('chainChanged', (newChain) => {
console.log(Chain changed to ${newChain});
});
5. Check for errors
If your dApp is not receiving events or functions, check the browser console and JavaScript error stack for any errors that might be causing the issue.
Conclusion
Changing the chain on WalletConnect’s wallet can sometimes cause unexpected behavior in your dApp. By following these troubleshooting steps and verifying event listeners are set correctly, you should be able to resolve the issue and ensure that your dApp receives events and functions when a user interacts with WalletConnect on their account address and chain ID.
Additional Resources
- [WalletConnect Documentation](
- [WalletConnect GitHub Repository](