Cross-chain · Base → BNB Chain

Swap WETH from Base to BNB on BNB Chain

Swap WETH from Base to BNB on BNB Chain. Base WETH leaves, and native BNB is the coin that arrives.

The token you approve is 0x4200000000000000000000000000000000000006 on Base, chain 8453, checked on Basescan. The coin you receive is native BNB on chain 56, written as 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE. BscScan shows that as the account balance, not as a token contract. Blocks are about 3 seconds. Pegged ETH at 0x2170Ed0880ac9A755fd29B2688956BD959F933F8 is the lookalike people open by mistake. Unwrapping WETH on Base would have returned ETH on Base instead of BNB.

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

Wrapped ether becomes another chain's gas

You give up an ERC-20 claim on ETH and you receive the fee coin of BNB Chain. After it lands, transfers on chain 56 can spend it. The quote decides the amount. It is not sized as a stipend, and a small fill can still be eaten by the next few transactions. Read the minimum before you treat the result as spare gas.

The approval stays on Base

Only the WETH allowance is signed on chain 8453, and it costs ETH. If you have no ETH beside the WETH, you cannot pay that approval. Native BNB does not exist on Base to help. If you decline the allowance, the router cannot pull the wrapper and the hop does not start.

Same placeholder, different coin

On Base, 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE means ETH. On BNB Chain it means BNB. Seeing that string on both lines of the quote does not mean you are moving one coin unchanged. You are selling wrapped ETH for a different native coin. Confirm chain id 56 on the destination side before you sign.

Do not call this an unwrap

An unwrap burns 0x4200000000000000000000000000000000000006 and credits ETH on Base. This page credits BNB on BscScan. Use the unwrap when a Base app needs the gas coin. Use this route when a BNB Chain app needs BNB. How to bridge assets between chains is the signing outline, not a timer. No arrival duration is stated here.

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 WETH from Base to BNB on BNB Chain?

Does this route deliver pegged ETH?

No. Pegged ETH is 0x2170Ed0880ac9A755fd29B2688956BD959F933F8 on BscScan. This route delivers native BNB, shown on the account, and labeled 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE in the quote. If a contract call needs the pegged ETH address, you are on the wrong page. BscScan will show BNB on the account line, not inside that pegged contract.

Is unwrapping Base WETH enough?

No. Unwrapping returns ETH on Base, chain 8453, at the gas-coin balance. It does not create BNB on chain 56. This route spends 0x4200000000000000000000000000000000000006 and credits BNB, which you verify on BscScan. The local unwrap and this hop solve different problems. Stay with the unwrap only when the ETH must remain on Base.

What do I need on Base besides WETH?

A little native ETH to pay for the approval and the send. WETH cannot pay Base gas until it is unwrapped, and unwrapping would take you off this route. Chain 8453 is an L2. The BNB you are buying cannot pay that Base fee because it is not on Base yet.

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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