Quickstart: Arbitrum bridge

This quickstart is for users who want to deposit ETH or any ERC-20 tokens from a Parent chain to a Child chain or vice versa, using Arbitrum's bridge. For example, from Ethereum to Arbitrum One, or from Arbitrum One to a Layer 3 Arbitrum chain.

We will walk you through the entire process step by step, providing as much detail as possible. If you feel stuck at any step, don't hesitate to contact us through our Discord, and we will be happy to help you complete the process.

The only prerequisite for this quickstart is to have a Web3 Wallet installed, such as MetaMask or OKX Wallet. If you don't have one installed, visit the Arbitrum's portal for a list of wallets to choose from to download.

Deposit ETH or ERC-20 tokens (from parent chain to child chain)

Step 1: Get some native currency

You'll need the native currency of the parent chain to bridge your assets to the destination chain. For example, if you want to bridge assets from Ethereum to Arbitrum One, you'll need ETH on Ethereum to initiate the process.

There are several ways to obtain the native currency:

• Using a supported centralized exchange, which allows you to purchase ETH and withdraw it to your wallet. Most major centralized exchanges support direct withdrawals from your centralized exchange wallet to Arbitrum.
• Using an on-ramp service, which allows you to purchase ETH and send it directly to your wallet.
• If you are using a testnet, request funds from a faucet for Sepolia or Arbitrum Sepolia.

Step 2: Add the preferred network to your wallet

You'll also need to add the desired chain's RPC endpoint to your wallet. Here, we provide an example of how to do this using MetaMask/OKX Wallet; however, the process should be similar for any other wallet.

1. You need to first click on the MetaMask/OKX Wallet extension in your browser.
2. Click the network selector drop-down in the top-left corner.
3. Click the Add Network button at the bottom.
4. Click Add a network manually and then provide information corresponding to the chain you want to send your assets to.

• Here, we display information about the most common Arbitrum Chains. For a more exhaustive list, please visit our RPC endpoints and providers page.

Parameter	Arbitrum One	Arbitrum Nova	Arbitrum Sepolia (testnet)
Network name	Arbitrum One	Arbitrum Nova	Arbitrum Sepolia
RPC URL	https://arb1.arbitrum.io/rpc	https://nova.arbitrum.io/rpc	https://sepolia-rollup.arbitrum.io/rpc
Chain ID	42161	42170	421614
Currency symbol	ETH	ETH	SepoliaETH
Block explorer URL	https://arbiscan.io	https://nova.arbiscan.io/	https://sepolia.arbiscan.io

Step 3: Initiate the deposit

To bridge your ETH or ERC-20 tokens to a different chain, start by visitng bridge.arbitrum.io.

1. Log in to the bridge with your wallet.
2. Ensure (or choose) the source network is selected (from where you want to deposit your assets) at the top of the page.
3. Select the destination network (where you want your assets to go), e.g., Arbitrum One.

caution

Note that testnets like Arbitrum Sepolia only appear if you have an established connection to the appropriate parent testnet network (Ethereum Sepolia).

4. Select the token you want to bridge in the token drop-down menu. You can also enable/disable the token lists by clicking the Manage token lists button on the bottom-right corner of the drop-down menu.

5. Enter the amount of ETH or ERC-20 tokens you want to bridge over in the From box.
6. Press Move funds.
7. Follow the additional prompts from your Web3 wallet.

Ensure sufficient ETH balance

Please ensure you have sufficient ETH in your wallet to cover the transation costs; otherwise, the Web3 wallet pop-up will not appear.

After you submit the Transaction through your Web3 wallet, you can expect your funds to arrive on the destination chain within roughly 15-30 minutes (depending on the chain congestion).

Also, ensure your wallet is set to the destination chain so you can see when your funds arrive.

Withdraw ETH or ERC-20 tokens (from child chain to parent chain)

Seven day withdrawal period for Arbitrum One and Nova networks

Once you withdraw your funds from Arbitrum One or Nova through the Arbitrum bridge, you will have to wait for at least seven days to receive them on the Ethereum mainnet. For more details, see Arbitrum Bridge: Troubleshooting.

To bridge your funds back to the parent chain, you must be logged in to the Arbitrum bridge with your wallet and ensure you establish a connection to the source network (from which you want to withdraw assets) at the top of the page. Then, select the destination network (where you want your assets to go), e.g., Ethereum mainnet.

caution

Testnets like Arbitrum Sepolia only appear if you have an established connection to the appropriate parent testnet network (Ethereum Sepolia).

1. Select the token you want to bridge in the token drop-down menu. You can also enable/disable the token lists by clicking the Manage token lists button in the bottom-right corner of the drop-down menu.
2. Enter the amount of ETH or ERC-20 tokens you want to bridge in the From box.
3. Press Move funds.
4. Follow the prompts from your Web3 wallet.

Ensure sufficient ETH balance

Please ensure you have sufficient ETH in your wallet to cover the transaction costs; otherwise, no Web3 wallet pop-up will appear.

A countdown will pop-up stating that you'll receive your funds in 7-8 days.

You can check the status of your withdrawal by clicking on your profile in the top-right corner and opening the Transactions tab, where you can claim it when it's ready.

Once the countdown is complete, switch to the destination network on your wallet and press the Claim button, which has now turned blue, to receive your funds.

What's next?

The team working on Arbitrum is always interested and looking forward to engaging with its users. Why not follow us on X (Twitter) or join our community on Discord?