Optimism Bridge transfers ETH and supported ERC-20 tokens between Ethereum and OP Mainnet through smart contracts. Standard Bridge deposits typically take 1?3 minutes; withdrawals require a seven-day challenge period after proof. You need a compatible wallet and ETH to pay transaction fees on each network.
Optimism Bridge moves ETH and tokens from Ethereum to Optimism. Compare token routes, work out gas fees, and bridge to OP Mainnet from your wallet.
Ethereum to OP Mainnet
Typical Standard Bridge deposit
On Ethereum and OP Mainnet
Native and bridged assets compared
| Networks | Ethereum mainnet (chain ID 1) ↔ OP Mainnet (chain ID 10). |
|---|---|
| Supported assets | ETH and standard ERC-20 tokens with a corresponding bridged token contract; excludes rebasing and fee-on-transfer tokens. |
| Transfer time | Deposits: typically 1?3 minutes. Withdrawals: 7-day challenge period after proof, then finalization on Ethereum. |
| Gas cost example | 180,000 gas at 2 gwei = 0.00036 ETH; a 45,000-gas token approval adds 0.00009 ETH. Actual gas usage and price vary. |
| What you need | An Ethereum-compatible wallet, the asset to transfer, and ETH for gas. ERC-20 deposits need sufficient token allowance. |
| Custody model | Wallet-signed smart contract transfers; native ERC-20 tokens are locked in the bridge and corresponding tokens are minted on the destination network. |
See the Optimism Standard Bridge documentation for supported assets and the OP Stack withdrawal specification for proof and finalization.
Ethereum gas is part of every deposit. Add approval gas for tokens and any route charge to see the cost in ETH. Edit the inputs using the transaction details in your wallet.
Ethereum
OP MainnetStandard Bridge receipt: ETH on Optimism
Gas cost = gas units × gas price ÷ 1,000,000,000. Use your wallet's gas estimate to budget; the final charge uses gas consumed. Add separately quoted route or relay costs in the route fee field.
Open bridgeWhat changes the cost? Network demand changes gas prices. Token approvals add a transaction. A larger transfer amount alone does not multiply the gas fee. The margin applies to gas; your transferred assets are separate from this total.
The token you send and the token you receive can have different contracts. Check the destination asset before choosing an Ethereum to Optimism route.
| Send on Ethereum | Receive on Optimism | Transfer mechanism | Approval |
|---|---|---|---|
| ETHEther | ETHNative gas asset | Standard Bridge deposit | Not needed |
| USDCUSD Coin | USDC.eBridged USDC | Standard Bridge lock & mint | When allowance is low |
| USDCUSD Coin | USDCNative USDC | Circle CCTP burn & mint | When allowance is low |
| USDTTether | USDTBridged token | Standard Bridge lock & mint | When allowance is low |
USDC and USDC.e are separate assets. Match the received contract to the deposit, trading or lending app you plan to use.
Keep ETH for your next transaction. Stablecoin balances pay for transfers of value; ETH pays gas on OP Mainnet. The network's chain ID is 10.
A deposit starts on Ethereum and arrives in your wallet on OP Mainnet. The Standard Bridge relays the deposit message between the two networks.
Start an Optimism Bridge transferSet Ethereum as the source and Optimism as the destination. Enter the amount, check the receiving token and confirm the recipient address.
Keep enough ETH for the deposit. For ERC-20 tokens, review the spender and approve the required amount when your existing allowance is insufficient.
Review the transaction and sign on Ethereum. Save the transaction hash so you can follow its inclusion and the destination delivery.
Switch your wallet to Optimism and check the balance. Import the verified token contract if the asset is not yet visible in your wallet.
Deposits and withdrawals follow different processes. Choose a route by its settlement mechanism, destination token and total cost.
Deposits use the native Ethereum–Optimism messaging path. A return withdrawal is initiated, proven and finalized through the protocol.
Typical Ethereum → Optimism deposit
Withdrawal challenge period after proof
Liquidity providers fund a destination payout. CCTP moves native USDC through burning and minting. Each mechanism has its own fees and settlement conditions.
Arrival depends on liquidity and finality
Match the received token and net amount
Deposit times depend on source-chain inclusion and network conditions. Canonical withdrawals also need proof and finalization transactions; liquidity payouts follow the selected provider's terms.
Every route has a contract and settlement model. Review the transaction details that control where your funds go and how they arrive.
Use Ethereum mainnet as the source and OP Mainnet, chain ID 10, as the destination. Check the full recipient address, especially when using a smart contract wallet.
A familiar ticker can represent different assets. Match the receiving contract, inspect the approval spender and set an allowance that fits the transfer.
Protocol routes depend on bridge contracts and the rollup's withdrawal process. Liquidity routes add provider and liquidity exposure. For a new route, begin with a small transfer.
Practical answers about deposits, fees, token versions and withdrawals.
Optimism Bridge moves ETH and supported ERC-20 tokens between Ethereum and Optimism, also called OP Mainnet. Choose a token and route, review the destination asset and fees, then confirm the transfer in your wallet.
Standard Bridge deposits from Ethereum to Optimism usually take 1-3 minutes. Ethereum congestion and transaction inclusion affect arrival time. A canonical withdrawal back to Ethereum includes a seven-day challenge period after the withdrawal is proven, followed by finalization.
Yes. Keep ETH on Ethereum to pay for the token approval and deposit transaction. Keep ETH on Optimism for transactions after arrival. OP is the governance token; ETH pays transaction fees on OP Mainnet.
The destination token depends on the route. A Standard Bridge transfer of Ethereum USDC delivers bridged USDC.e. A Circle CCTP route burns native USDC on Ethereum and mints native USDC on Optimism. Match the destination token contract to the app where you intend to use it.
An ETH deposit has no token-allowance transaction. An ERC-20 deposit may need a separate approval when the existing allowance is too low. Each transaction consumes gas, and the final charge uses gas consumed multiplied by its effective gas price. Route fees can add to the total.
Yes. A canonical withdrawal involves initiating the withdrawal on Optimism, proving it on Ethereum, waiting for the seven-day challenge period, and finalizing it on Ethereum. Liquidity routes can provide an earlier payout, with fees and availability determined by the route.
Check the Ethereum transaction receipt first. A pending source transaction needs inclusion before the deposit can progress. After confirmation, check the recipient address, switch your wallet to OP Mainnet, and verify the destination token contract. Use the original transaction hash to track the transfer before sending again.
Choose your token, review your route and transfer to OP Mainnet.