Ethereum: Getting error “Could not fetch chain ID. Is your RPC URL correct?” in metamask while trying to add Anvil running on wsl

Ethereum integration problems with metamask and anvil

As a developer building decentralized applications (Dapps) in Ethereum, it is not uncommon to find problems by integrating with third party portfolios such as Metamask and Anvil. I recently found an error message that has plagued many users: “It was not possible to look for the chain ID. Is your RPC URL correct?” This problem is quite common in the context of Dapp execution on the Windows subsystem for Linux (WSL) or using a headless metamask instance.

What is happening under the hood?

Blockchain Ethereum uses an exclusive identifier called Chainid to identify each block chain. When you run your metamask or anvil instance, it needs to be able to look for this information from the Ethereum network. However, if the RPC URL (Remote Procedure Call) of your Metamask or Involle Instance is incorrect, it will not recover the blockchain ID.

Possible causes:

• URL RPC Incorrect : Make sure you insert the correct RPC URL into metamask and anvil instances.

• Network connectivity questions : Make sure your WSL environment has a stable internet connection (you can test it by running curl -v http: // localhost: 8545 to check network availability) .

• Incorrect chain id : You may define the Ethereum Mainnet chain ID incorrectly in your metamask or anvil instance.

4.

Step problem solution:

• Check your Metamask and Bigor Big Instances : Make sure both instances are running correctly and have no authentication problems (eg, incorrect portfolio or key).

• Check the RPC URL in the Metamask Instance : Check the Wallet section of your metamask instance to ensure that it is defined to the correct address.

• Test Your WSL Environment for Network Connectivity : Perform a simple test like Curl -v http: // localhost: 8545 To check if you can reach the Ethereum network.

• Update your chain id : If you have changed the Ethereum Mainnet chain id, make sure it is correctly defined in metamask and anvil instances.

Solutions:

• Check your WSL configuration: Make sure your WSL environment is configured to use the correct RPC URL for your Ethereum instance.

• Redefine the instance of metamask or anvil : If you are using a headless instance, try to redefine it by excluding the metamask.conf file and restarting the process.

Conclusion:

To solve the error “I could not seek the chain ID error” in metamask with Anvil working in WSL, make sure:

• Your metamask and anvil instances are working properly.

• The RPC URL is correct for both instances.

• Network connectivity problems have been solved (for example, check your internet connection).

• You checked the Ethereum main chain ID.

By following these problem -solving steps and solutions, you can solve this problem and start creating your Dapps on Ethereum.

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