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Bridge Arbitrum ETH

Arb Canonical ETH moves native ETH between Ethereum and Arbitrum-stack chains using Arbitrum's own canonical contracts - the Delayed Inbox and its retryable-ticket mechanism on the way in, ArbSys on the way out. The same path Arbitrum's own bridge UI uses. No CCIP fee, no wrapping.

Withdrawals take ~7 days

Deposits land in ~10-15 minutes. Withdrawals back to Ethereum are a canonical exit: they clear the standard ~7-day challenge period before you claim them on Ethereum. If you need ETH out of Arbitrum One faster, the CCIP WETH lane takes minutes but arrives as WETH and charges a CCIP fee. Robinhood Chain has no WETH-via-CCIP lane, so this rail is the only route in either direction.

Supported chains​

Ethereum ↔ Arbitrum One · Ethereum ↔ Robinhood Chain

Only native ETH is supported on this rail. ERC-20s (including WETH) continue to bridge via CCIP, and native USDC via CCTP.

What you need​

  • Native ETH in your wallet on Ethereum
  • Enough ETH to cover the flat EntryPoint fee, the L2 gas funds, and the retryable submission cost (the app quotes the total before you confirm)

Depositing into Arbitrum One or Robinhood Chain​

1. Connect your wallet​

  1. Open the SkyBridge app.
  2. Click Connect and complete the wallet connection.

2. Select Ethereum as source​

  1. Set the source chain to Ethereum and the destination to Arbitrum One or Robinhood Chain.
  2. Select ETH as the token.
  3. The app offers Arb Canonical as the route - on the Ethereum → Arbitrum One lane it's preferred over CCIP because it's cheaper and delivers native ETH directly.

3. Enter the amount​

The interface shows the flat EntryPoint fee, the estimated L2 gas funds and submission cost, and the amount you'll receive on the destination.

4. Confirm and bridge​

  1. Review the transfer details and click Bridge.
  2. Sign the transaction in your wallet. The transaction's value covers the deposit amount, the flat fee, the retryable submission cost, and the L2 gas funds, in one exact payment.

5. Track your transfer​

Deposits typically arrive within ~10-15 minutes - the time for the retryable ticket to be picked up and auto-redeemed on the destination chain. Check the Activity panel for status; there are no intermediate proving or finalization steps like the OP Standard Bridge's deposit path.

Withdrawing back to Ethereum​

The return trip uses the same rail in reverse, through Arbitrum's ArbSys precompile.

  1. Set the source chain to Arbitrum One or Robinhood Chain, the destination to Ethereum, and select ETH.
  2. Enter the amount and confirm. There are no retryable gas parameters to cover this direction - you pay the flat EntryPoint fee plus L2 gas.
  3. The withdrawal enters the standard ~7-day challenge period. The Activity panel tracks its status.
  4. Once the period elapses, come back and claim the withdrawal on Ethereum. This is a second transaction, signed on Ethereum, and it delivers real native ETH.
Faster alternative on Arbitrum One

Arbitrum One also has a WETH-via-CCIP lane that settles in minutes. It arrives as WETH rather than native ETH and charges a CCIP fee, but it avoids the week-long wait. Robinhood Chain has no such lane.

Notes​

  • This rail does not support ERC-20s or NFTs - use CCIP for those, even on Arbitrum One or Robinhood Chain.
  • Any leftover L2 gas funds beyond what the retryable ticket actually consumes are refunded automatically on the destination chain, to your own address - not swept by the protocol.
  • If bridging to Robinhood Chain, remember that the only route back is the ~7-day canonical withdrawal above - there is no fast WETH-via-CCIP lane on that chain.

Troubleshooting​

  • Transfer stuck in "pending" past 15 minutes: the retryable ticket may have failed to auto-redeem (for example, if L2 gas prices spiked between quote and inclusion). It remains redeemable for up to 7 days; contact support on Discord if you need help redeeming it manually.
  • ETH not showing on destination: confirm you've added the destination chain to your wallet and switched to it.