Tunnel in 3 steps
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Choose how much ETH to send and paste the Optimism address that should receive funds on Optimism mainnet.
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Open the order to freeze the quote and reveal a one-time deposit destination.
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Broadcast ETH to that destination. Once confirmations clear, OP is pushed to your payout wallet.
Before you broadcast
- Base confirmations are usually fast — often within a minute.
- Send ETH on Base mainnet only — not Ethereum L1, Optimism, or Arbitrum unless your order says otherwise.
- Use a Base-compatible wallet and address (0x…). Leave enough ETH on Base for gas on top of the swap amount.
- Still waiting on OP? Give the wallet a few minutes to sync, then share your Exchange ID with support if the order already lists a payout hash.
ETH on Base — Coinbase L2
Native ETH on Base — Ethereum's value on Coinbase's L2 with low fees, fast finality, and growing on-chain activity.
ETH on Base mainnet
Use a Base wallet for deposits. Ethereum mainnet ETH is a different network — wrong-chain sends may not be credited.
Leave enough ETH on Base for gas in addition to the amount you swap.
Optimism — Ethereum L2 with low fees
OP is the governance token of Optimism — an Ethereum rollup with fast, low-cost transfers and deep Superchain liquidity.
OP not received?
Confirm your wallet is on Optimism mainnet and fully synced.
OP payout tips
- Payouts go to Optimism — verify your wallet RPC is set to Optimism, not Ethereum mainnet.
- Check Optimistic Etherscan with the payout tx hash from your order page.
- Allow a minute for your wallet to refresh after the explorer shows the transfer.
Before you swap
Avoid wrong-network deposits and address format mistakes — read these guides first.
Coin swap hubs
More no-KYC swap pairs and guides for each asset.
Frequently asked questions
Do I need KYC to swap ETH for OP on TunnelSwap?
No. TunnelSwap is an anonymous no-KYC, privacy-first exchange. There is no account, no ID upload, and no standing balance for Ethereum (Base) → Optimism swaps.
How fast is a ETH → OP swap?
Most routes settle within minutes. Final timing follows Base mainnet deposit confirmations and Optimism mainnet payout speed.
Does TunnelSwap hold my ETH or OP?
No. You fund the deposit from your wallet and OP is sent straight to the address you paste — non-custodial, wallet to wallet.
What if I use the wrong network for ETH?
Only send on the network shown for the order (Base mainnet). Wrong-chain deposits can be unrecoverable — review the safety guides before you broadcast.