Cross-chain · BNB Chain → Base

Swap BNB from BNB Chain to ETH on Base

Swap BNB from BNB Chain to ETH on Base. You send native BNB on BNB Chain and you receive native ETH on Base.

Both sides use 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE. On BNB Chain, chain id 56, the marker is BNB. On Base, chain id 8453, it is ETH. BscScan shows the BNB leaving. Basescan shows the ETH arriving. There is no ERC-20 approval on either gas coin. Blocks on BNB Chain are about 3 seconds. Base is an Ethereum L2, not mainnet. This is not the WETH predeploy and not the ETH peg.

Diagram for Swap BNB from BNB Chain to ETH on Base
BNB leaves BNB Chain. ETH is what can arrive on Base.

One marker, BNB leaving and ETH arriving

The string is not a coin that teleports. It means the gas coin of the chain you are on. You sell BNB and you buy ETH on an L2. Both can move. The Binance-Peg ETH contract is not an input. If that is all you hold, this page will not take it. Leave some BNB or the source fee fails.

Received ETH can pay Base fees

Because the payout is the gas coin, you do not need old ETH on Base for the new balance to be usable. That differs from landing in USDC or WETH. Basescan will not show an ERC-20 for this credit. Etherscan will not show it as mainnet ETH. Chain id 8453 is the check.

The predeploy if you needed the wrapper

WETH at 0x4200000000000000000000000000000000000006 is another page. This one is the wrong tool if a pool asked for that contract. Dollar payouts are other pages too. How bridges work is the wait, not a BNB to ETH rate. Nothing freezes the amount.

Read the ETH floor before you sign

The estimate and the minimum are different lines. Sign against the minimum. A 3 second block on chain id 56 does not freeze ETH. Confirm the wallet is on BNB Chain, then look on Basescan with chain id 8453. If the floor is too small, do not sign.

Legal

Risk disclosure

XAUConnect is a non-custodial swap aggregator. Digital assets are volatile and may lose value rapidly. Content on this page is educational and not investment advice. Verify every contract address on the official block explorer before approving a transaction.

Frequently asked questions

What is the best way to swap BNB from BNB Chain to ETH on Base?

Both sides use 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE. On BNB Chain, chain id 56, the marker is BNB.

Why do both addresses match if BNB and ETH differ?

0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE stands in for the native gas coin. BscScan's native coin on chain id 56 is BNB. Basescan's native coin on chain id 8453 is ETH. There is no ERC-20 approval on either side. The ETH peg and the WETH predeploy are separate. Base is an L2, not Ethereum mainnet.

Do I need ETH on Base before this swap?

No. The ETH from this route can pay L2 fees after it arrives. You do need BNB left on chain id 56 to pay the source fee. If you spend the entire BNB balance, the send cannot be mined. Basescan is where the native credit belongs, on chain id 8453.

Can I reverse it if ETH drops after I sign?

No. A confirmed BNB transfer is not reversed here, and the price is not insured. Read the minimum ETH first. The 3 second block is only BNB Chain. It is not a promise about how much ETH Basescan will show, or about when that credit appears.

Live execution

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Open the swap page with this cross-chain route pre-selected, then connect your wallet on the source chain to quote and execute. You keep the keys.

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