Metamask: How to use window.ethereum to read from EVM storages since window.web3 is deprecated in the latest Metamask update?

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Metamask Update: How to Read from EVM Storage Slots with Window.ethereum

Introduction

As the Ethereum (ETH) blockchain continues to evolve, Web3 technologies have also undergone significant updates. The latest update introduced changes to the window.web3 object, which has left many users wondering how they can access EVM storage slots using the new API. In this article, we will explore a solution for reading from EVM storage slots in Metamask using Window.ethereum.

Problem: Window.web3 Deprecation

In a recent update, the Web3 window.web3 object was deprecated, making it necessary to use alternative methods to access Ethereum services. This change has caused confusion among developers and users, including those using MetaMask, a popular web-based wallet for Ethereum transactions.

Solution: Using Window.ethereum

To read from an EVM storage slot in Metamask, you will need to install the window.ethereum package using npm or yarn:

npm install window.ethereum --save

Once installed, you can import the Window object and access Ethereum services. Here is an example of how to use it:

import { Window } from "window.ethereum";
const web3 = new Web3(window.ethereum);

Accessing EVM Storage Slots

To read from an EVM storage slot, you can use the web3.eth.getStorageSlot method. This method returns an object containing information about a specific storage slot in the EVM.

import { Window } from "window.ethereum";
const web3 = new Web3(window.ethereum);
const storageSlot = web3.eth.getStorageSlot("0x..."); // Replace with the address of the storage slot


// Access data from storage slot

console.log(storageSlot.data); // This will record the contents of the storage slot


// Write data to the storage slot

storageSlot.write("Hello, Ethereum!", "0x..."); // Replace with storage slot address and write method

Use Case Example: Capturing the Ether Challenge

In Capture the Ether (CTE), players must navigate through various challenges while avoiding obstacles. To read from the EVM storage slot in Metamask during the challenge, you can use the window.ethereum object to access Ethereum services.

Here is an example of how you can implement this:

import { Window } from "window.ethereum";


const web3 = new Web3(window.ethereum);

let playerData = web3.eth.getStorageSlot("0x..."); // Replace with the address of the storage slot


// Use data to navigate challenges

if (playerData.data === "Hello, Ethereum!") {

  console.log("You won!");

} otherwise {

  // Move away from obstacles

}

Conclusion

In this article, we explored how to use Window.ethereum in Metamask to read from EVM storage slots. By installing the window.ethereum package and importing the Window object, you can access Ethereum services using alternative methods. This solution provides a working solution for reading from EVM storage slots into Metamask, even after the Web3 object window.web3 is deprecated.

I hope this article helps you navigate challenges like Capture the Ether with confidence!