How to Add Arbitrum Network to MetaMask Wallet to use OpenWorld

Overview OpenWorld is a decentralized financial platform built on the Arbitrum blockchain, which is a layer-2 solution that allows for faster, cheaper transactions than the Ethereum blockchain.

Step 1: Install MetaMask Wallet

Go to metamask.io and download the MetaMask browser extension or mobile app.
For the browser extension, choose your browser: Chrome, Firefox, Brave, etc. Click "Download".
For mobile, go to the Apple App Store or Google Play Store to download and install the MetaMask app on your phone.
After installing, open MetaMask and you'll see the welcome screen.
You can choose to import an existing wallet or create a new wallet.
To create a new wallet, click "Create Wallet".
On the next screen, you will be asked if you want to share anonymous usage data with MetaMask. This is optional and does not affect your wallet functionality. If you want to share usage data, click "I agree" to enable sharing. If not, click "No thanks" to opt-out.

Set a strong password for your wallet. This password encrypts your private key locally to keep your wallet more secure.
After you choose your password, MetaMask will give you some useful information about your wallet’s seed phrase. Read through it carefully if you’re not familiar with how crypto wallets work.

You'll then be shown your seed phrase words. This is the backup for your wallet, so carefully write these 12 words down and store them securely. Never share your phrase with anyone. Do not lose your seed phrase words. You can use them to move your assets to different wallets.
Next, confirm your seed phrase by entering the words in order. Take your time to get this right.

You have now completed the steps to protect your wallet. Click “Got it!” to finish setting up your new wallet.

Click “Next” and then “Done” to finish the installation of the MetaMask wallet.
You can now access your MetaMask Ethereum wallet via the browser extension icon! Next, we'll connect it to the Arbitrum network.

Step 2: Add Arbitrum Network

In MetaMask, click on the network icon at the top left corner (the default is Ethereum Mainnet).
Select "Add Network" to add a new network.
Find Arbitrum One and click "Add" to add the Arbitrum network.