How to add the Scroll network to MetaMask? (Layer 2 Setup)

Understanding Scroll Network Fundamentals

1. Scroll is a zk-rollup Layer 2 scaling solution built for Ethereum, designed to inherit Ethereum’s security while significantly lowering transaction fees and increasing throughput.

2. It uses zero-knowledge proofs to batch transactions off-chain and submit cryptographic validity proofs to the Ethereum mainnet.

3. Scroll supports full EVM equivalence, meaning smart contracts deployed on Ethereum can be deployed on Scroll without code modifications.

4. The network operates with its own native token, though it is currently non-transferable and used only for gas payments in early phases.

5. Block production and finality are coordinated through a decentralized sequencer set, gradually transitioning toward full decentralization.

Prerequisites for MetaMask Integration

1. A compatible version of MetaMask (v10.25.0 or later) must be installed as older versions may lack support for custom chain parameters like Scroll’s specific chain ID and RPC endpoints.

2. Users need access to a stable internet connection and must ensure their browser extension or mobile app is not blocked by ad-blockers or privacy extensions interfering with RPC calls.

3. Prior knowledge of Ethereum wallet recovery phrases is essential—no recovery is possible if credentials are lost during setup.

4. Sufficient ETH must be held on Ethereum mainnet to cover bridging costs and initial gas fees on Scroll, as cross-chain transfers require mainnet confirmation.

5. Users should verify official Scroll documentation URLs directly from scroll.io to avoid phishing sites mimicking RPC configuration pages.

Manual Chain Configuration Steps

1. Open MetaMask and click the network dropdown in the top-center area, then select “Add network” → “Add a network manually”.

2. Enter Scroll Mainnet as the Network Name.

3. Input 534352 as the New RPC URL — this is Scroll’s official mainnet endpoint: https://rpc.scroll.io.

4. Set Chain ID to 534352 and Currency Symbol to ETH.

5. Enter https://scrollscan.com as the Block Explorer URL to enable transaction verification and contract interaction via the explorer.

Bridging Assets from Ethereum to Scroll

1. Navigate to the official Scroll Bridge at https://bridge.scroll.io while connected to Ethereum mainnet in MetaMask.

2. Connect the same MetaMask wallet used for chain setup and confirm wallet permissions when prompted.

3. Select ETH or supported ERC-20 tokens, enter the amount, and initiate the deposit—this triggers a Layer 1 transaction requiring Ethereum mainnet confirmation.

4. Wait for the bridge to finalize the transfer; typical completion time ranges from 10 to 30 minutes depending on Ethereum congestion and Scroll’s current proof generation interval.

5. Once confirmed, switch MetaMask to the Scroll network to view the newly bridged assets in the wallet balance.

Frequently Asked Questions

Q: Can I use MetaMask Mobile to connect to Scroll?A: Yes, MetaMask Mobile supports Scroll Mainnet as of version 8.12.0. Users must manually add the network using the same parameters as desktop, then switch networks within the app interface.

Q: Why does my transaction fail with “insufficient funds” even though I have ETH on Scroll?A: Scroll requires ETH for gas, but deposits from Ethereum only appear after bridge finalization. Verify your balance on ScrollScan and ensure you’re on the Scroll network in MetaMask before initiating transactions.

Q: Is it safe to input Scroll’s RPC URL into MetaMask?A: Yes, the official RPC endpoint (https://rpc.scroll.io) is operated by the Scroll team and verified across multiple independent audits. Never enter RPC URLs from unverified third-party sources.

Q: Do I need a separate wallet address for Scroll?A: No, Scroll uses the same Ethereum address derivation path. Your existing MetaMask address remains valid and fully functional on Scroll without generating new keys or recovery phrases.