Troubleshooting Error: “Could not fetch chain ID. Is your RPC URL correct?” in Metamask

Metamask is a popular Ethereum wallet extension that allows users to store, send, and receive Ether (ETH) on their computer or mobile device. Recently, you may have encountered an error message when trying to add the Anvil plugin to MetaMask while running it in Windows Subsystem for Linux (WSL). This article will help you troubleshoot and resolve the issue.

What is causing the problem?

The error “Could not fetch chain ID. Is your RPC URL correct?” occurs when Metamask fails to connect to the Ethereum blockchain network using Web3.js, a JavaScript library for interacting with the Ethereum blockchain. The issue can be caused by several factors, including:

• Incorrectly configured RPC (Remote Procedure Call) URL

• Network connectivity issues between WSL and Ethereum blockchain

• Plugin conflicts or dependencies not met

How to fix the problem?

To resolve this issue, follow these steps:

• Verify your RPC URL: Double-check that you are using the correct RPC URL for your Ethereum node. You can find the address of your node by running wsl --list-nodes in a new terminal window.

• Check network connectivity: Ensure that WSL is connected to your Ethereum blockchain network. You can do this by:

* Opening a new terminal window

* Running wsl --connect "your-wsl-machine-name" (replace with the actual name of your machine)

* Verify that you are connected to the network using wsl --nodes command

• Disable plugin conflicts: Sometimes, plugins can conflict with each other. Try disabling and re-adding the Anvil plugin to see if it resolves the issue.

• Update Metamask and Web3.js

  

  : Ensure you have the latest versions of Metamask and Web3.js installed on your computer. You can update them by running npm install --global metamask and npm install web3.

• Check plugin dependencies: Verify that all required dependencies for the Anvil plugin are met. You can check this by running pip list anvil (if you’re using pip) or node -v followed by Web3.js version.

• Run MetaMask in a new instance of WSL: If you’ve recently updated your Metamask extension, try running it in a new instance of WSL to see if the issue resolves itself.

Additional Troubleshooting Steps

If none of the above steps resolve the issue, you can try:

• Checking the Ethereum blockchain status by running etherscan.io.

• Verifying that your Ethereum wallet is set up correctly.

• Reaching out to the Metamask community or support forums for further assistance.

By following these steps, you should be able to troubleshoot and resolve the “Could not fetch chain ID. Is your RPC URL correct?” error in MetaMask while running it on WSL.

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