Metamask: How would I make my chain “Metamask compatible”

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Creating a Metamask-Compatible Chain for a Rust Blockchain Project

As you continue to work on your Rust-based blockchain project, you’ll probably want to add a layer of compatibility with existing Metamask wallets and tools. In this article, we’ll walk you through the process of making your chain compatible with Metamask.

What is Metamask?

Metamask is an extension for MetaMask, a popular browser-based wallet that allows users to store, send, receive, and manage cryptocurrencies. It provides a way to interact with decentralized applications (dApps) on the Ethereum blockchain without having to install a full-fledged dApp runtime.

Why are you trying to make your chain compatible with Metamask?

Before we dive into the solution, let’s quickly discuss why this is important:

• Integration with existing wallets: Having a chain compatible with Metamask allows users to seamlessly switch between their preferred wallet and the blockchain platform.

• EVM support on the live testnet: By making your chain compatible with Metamask, you can enable EVM (Ethereum Virtual Machine) support on the live testnet, which is essential for testing and development purposes.

Prerequisites

Before we begin, make sure that:

• You have a basic understanding of the Rust programming language.

• Your project has already set up the CLI wallet, network, RPC API, and EVM support (if it hasn’t already been done).

• You are familiar with the concepts of Ethereum Virtual Machines (EVM) and WebAssembly (WASM).

Step by Step Guide

Here is a step-by-step guide to creating a Metamask-compatible chain for your Rust blockchain project:

Step 1: Update your Cargo.toml file

Open your Cargo.toml file and update the dependencies section with the following lines:

[dependencies]
ethereum = "0.8.11"

Step 2: Add a newmetamask-adapterplugin

Create a new directory for your Metamask adapter plugins and add a file calledCargo.tomlwith the following content:

[dependencies]
ethereum = "0.8.11"

Then create a new file called metamask-adapters.tomlin the same directory and paste the following code:

metascan-packages;
#[cfg(windows)]
pub mode windows;
#[cfg(unix)]
pub unix mod;

Create a new file called metamask.rsin the same directory as your Rust project. This will contain the implementation of the Metamask adapter:

use std::fs;
use std::path::PathBuf;
pub struct MetamaskAdapter {
pub key_path: string,
}
impl MetamaskAdapter {
pub fn new(key_path: &str) -> Self {
Self { key_path }
}
pub async fn create_chain(
&self,
account: &str,
network_name: &str,
chain_id: u64,
) -> Result {
// Create a new instance of Metamask adapter
let file_path = PathBuf::from("./metamask-adapters.toml");
fs::create_dir_all(&file_path)?;
// Write Metamask adapter configuration to file
write_to_file(&self.key_path, &network_name)?;
OK(())
}
pub async fn connect(
& self,
account: &str,
network_name: &str,
chain_id: u64,
) -> Result {
// Read the Metamask adapter configuration from the file
let key_path = read_file(&self.key_path)?;
// Connect to MetaMask using the created adapter
connect_to_meta_mask(account, network_name, chain_id, &key_path)?;
OK(())
}
}

Update your Cargo.