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Metamask: How to Connect from a Localhost Webapp (Ethers) to a Remix VM
As a developer working on Ethereum-based projects, you have probably come across situations where you need to interact with smart contracts deployed on the mainnet, but don’t want to deploy them on testnets. That’s where Metamask comes in, a popular wallet and development environment that allows you to connect a local Ethereum node (localhost) directly to a Remix VM to seamlessly interact with deployed smart contracts.
In this article, we will walk through the Metamask setup process to connect from a local webapp (Ethers) to a Remix VM for easy deployment and interaction with smart contracts without the need for testnets.
Why use Metamask?
Before we get started with the setup process, let’s quickly discuss why we are using Metamask in this context. With Metamask, you can:
- Connect to your Ethereum node directly from the Remix IDE
- Deploy smart contracts on the mainnet without creating an account on the testnet
- Interact with deployed contracts using the Remix VM.
Step 1: Install Metamask
To get started, you will need to install Metamask on your local computer. You can download it from the official website.
- Go to the [Metamask download page] (
- Select the version that matches your operating system (Windows, macOS, or Linux)
- Follow the installation instructions for your chosen platform
Step 2: Configure Metamask
Once installed, you will need to configure Metamask to connect to your Ethereum node. Here’s how:
- Launch Remix IDE
- Click the “Wallet” tab in the top menu bar.
- Select “Configure Wallet” from the drop-down menu.
- In the Wallet Settings window, click the Advanced tab.
- Under Network, select Ethereum (Testnet) and enter the node’s private key
- Repeat steps 1-5 for each Ethereum account you want to connect
Step 3: Connect to Remix VM
Now that Metamask is configured, you can connect to Remix VM:
- Launch an instance of Remix IDE on your computer
- Click the Install tab in the top menu bar.
- Select Local (i.e., a local Ethereum master node) as the installation source.
- Select the accounts from which you want to install contracts
In this example, we assume that a single account is installed. You can link multiple accounts by separating them with commas.
Step 4: Install and Interact with Smart Contracts
Once logged in, you can deploy smart contracts using Remix VM:
- Open Remix IDE and create a new project
- Click the “Install” tab in the top menu bar.
- Select a local Ethereum node as the deployment source
Select the contracts you want to deploy from Remix IDE, and MetaMask will automatically connect to your local host node.
- Once deployed, you can interact with smart contracts using Remix VM:
- Deploy a new contract:
metamask remix --localaccount --contract
- Call functions on deployed contracts:
metamask remix --localaccount --contract --function
In this article, we provided a detailed guide on how to connect from a local web application (Ethers) to Remix VM using Metamask. By following these simple steps, you can unleash the power of deploying and interacting with smart contracts on the mainnet without creating testnets.
