RPC Error in Metamask: Understanding and Fixing

As a beginner, it can be frustrating to encounter errors while using your favorite tool. In this article, we will look into the error you are encountering with Metamask’s RPC (Remote Procedure Call) functionality, specifically when trying to use eth_maxPriorityFeePerGas.

What is Metamask and RPC?

Before we get into the issue, let’s quickly review what Metamask and RPC involve.

• Metamask: A popular Ethereum wallet software that allows users to interact with the Ethereum network through a web interface. It provides a secure way to store, send, and receive Ether (ETH) and other Ethereum-based tokens.

• RPC (Remote Procedure Call): A programming model in which an application can invoke a procedure on another server in real time.

Understanding eth_maxPriorityFeePerGas

In the context of RPC errors, eth_maxPriorityFeePerGas is a function that allows users to set their maximum priority fee for gas transactions. This value determines how much ETH can be paid as a fee when using the transaction protocol.

Error: “Method not found” or “Not available”

When you encounter an error message like RPC Error: Method "eth_maxPriorityFeePerGas" does not exist / is not available, it indicates that your application (or, in this case, Metamask) is trying to call a function on the Ethereum network, but cannot find or access that function.

Why did Hardhat remove eth_maxPriorityFeePerGas?

As you mentioned, Hardhat has removed support for eth_maxPriorityFeePerGas. This change was made in response to recent changes to Ethereum’s RPC interface. Specifically, the new RPC API deprecated the use of this specific feature.

**How ​​to fix the error: MetaMask – RPC Error: method ‘…

To resolve the error, follow these steps:

• Check Metamask version

  : Make sure you are running a compatible version of Metamask.

• Check wallet settings: Double-check that your Ethereum account is configured correctly and that the eth_maxPriorityFeePerGas feature is enabled.

Additional tips

• Make sure to update your Metamask app to the latest version if you are experiencing this issue.

• If you are still experiencing issues, we recommend contacting the MetaMask support team for further assistance.

By understanding what is causing the error and how to fix it, you should be able to get back on track using eth_maxPriorityFeePerGas in your Metamask applications. Happy coding!

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