Quick answer: To add Optimism to MetaMask, access your wallet settings, navigate to the Networks tab, and enter the Optimism network details manually or via a quick link.
- Optimism is a Layer 2 scaling solution for Ethereum.
- Adding Optimism to MetaMask requires network details or a quick link.
- Always double-check network details to avoid sending funds to the wrong network.
- Test with a small transaction before moving larger amounts.
- Keep your seed phrase secure and never share it.
Before you start
- Ensure you have the latest version of MetaMask installed.
- Have your MetaMask wallet unlocked and ready.
- Prepare a small amount of ETH for gas fees on the Optimism network.
- Backup your current MetaMask seed phrase if you haven’t already.
- Understand the irreversibility of blockchain transactions.
How to Add Optimism to MetaMask: step by step
1. Access MetaMask Settings
Open your MetaMask wallet by clicking the extension icon in your browser. Click on the account icon in the top right corner and select ‘Settings’ from the dropdown menu.
2. Navigate to Networks
In the Settings menu, find and click on the ‘Networks’ tab. This section allows you to manage and add different blockchain networks to your MetaMask wallet.
3. Add a Network Manually
Click on the ‘Add a network’ button. You will be directed to a page where you can enter the network details for Optimism. Alternatively, you can use a quick link as described in the next step.
4. Enter Network Details
If adding manually, input the following details: Network Name: Optimism, New RPC URL: https://mainnet.optimism.io, Chain ID: 10, Currency Symbol: ETH, Block Explorer URL: https://optimistic.etherscan.io. Double-check these details for accuracy.
5. Use a Quick Link (Optional)
Alternatively, you can add Optimism by clicking a quick link. Go to the ‘Add a network’ page and use the ‘Add a network via link’ option. Enter the RPC URL for Optimism: https://mainnet.optimism.io.
6. Save and Switch to Optimism
After entering the network details, click ‘Save’. MetaMask will verify the network and add it to your list of available networks. Switch to the Optimism network by selecting it from the network dropdown menu.
7. Fund Your Optimism Wallet
To use the Optimism network, you need to have ETH on the network. You can bridge ETH from Ethereum Mainnet to Optimism using a bridge like the Optimism Gateway. Visit the bridge, connect your MetaMask, and follow the instructions to transfer funds.
8. Test the Connection
Before making larger transactions, test the connection by sending a small amount of ETH to another address on the Optimism network. This ensures that your setup is correct and that you can transact safely.
9. Verify the Transaction
After testing, verify the transaction on the Optimism block explorer. Go to https://optimistic.etherscan.io and enter your transaction hash to confirm that the transaction was successful.
Fees and how long it takes
Fees for adding a network to MetaMask are negligible, primarily consisting of gas fees for transactions on the Optimism network. These fees fluctuate based on network congestion and the current price of ETH.
The time it takes to add Optimism to MetaMask is minimal, usually a few minutes. However, bridging funds from Ethereum Mainnet to Optimism can take longer, depending on network traffic and the bridge service used.
Tips to avoid mistakes
- Always double-check the network details before saving to avoid connecting to the wrong network.
- Use a small test transaction to ensure your setup is correct before moving larger amounts.
- Keep your MetaMask seed phrase secure and never share it with anyone.
- Consider using a hardware wallet for added security when managing your crypto assets.
- Stay informed about network updates and changes by following official Optimism channels.
Stay safe
- Never share your seed phrase with anyone.
- Double-check network details to avoid sending funds to the wrong network.
- Be aware of phishing scams and only use official links and resources.
- Keep your MetaMask extension and browser up to date to protect against vulnerabilities.
- Use two-factor authentication (2FA) if available for added security.
If something goes wrong
Network not appearing in MetaMask — Ensure you have entered the network details correctly and saved the network. Refresh the MetaMask interface and check the network dropdown menu.
Insufficient funds for gas fees — Transfer a small amount of ETH to your MetaMask wallet to cover gas fees. You can purchase ETH from a crypto exchange and withdraw it to your wallet.
Transaction not confirming — Check the Optimism network status for any issues or delays. If the network is congested, you may need to wait for the transaction to process or increase the gas fee.
Doing this as part of trading, income, or a disposal? See how it may be taxed in Tax by country and the taxable-events section — information, not advice.
