Sending ETH or WETH? Check the Bridge Asset First

Before sending ETH or WETH across a bridge, check which asset the destination chain will deliver. ETH is Ethereum’s native coin; WETH is ETH wrapped in an ERC-20 token, a format many apps use for trading and other contract actions. A route can accept one and deliver the other, so matching the name alone is not enough.

Why do bridges offer ETH and WETH?

ETH pays for transactions on Ethereum, while many smart contracts expect tokens that follow the ERC-20 format. WETH fills that role: it represents ETH and can generally be unwrapped back into ETH through the contract that issued it. On other networks, a token called WETH may be issued or supported by a different contract, so check the exact asset rather than assuming every WETH label means the same thing.

A bridge moves value between networks by using a route. Depending on the route, it may lock or burn the asset on one chain and release or create a corresponding asset on another. Some routes also use pools of tokens to complete the transfer. For a closer look at the security choices behind routes, read how Bungee bridge routes weigh security. The important point at the wallet is still the same: confirm the asset you will receive.

How can you check which asset will arrive?

Read the route details before approving the transfer. Check the sending network, receiving network, token names, and any token contract address shown. A contract address is the token’s unique identifier on a particular network. When two tokens have similar names, that address is a better way to tell them apart.

• Confirm whether the input is native ETH or WETH on the source chain.
• Check the output token and its network before submitting.
• Compare the output’s contract address with the address listed by the destination app or network’s official token information.
• Check whether you will need native ETH on the destination chain to pay transaction fees.

Wallets can display a token symbol or familiar logo, but those labels do not prove that a token is the one you intended to receive. If the route shows an unfamiliar asset or the destination contract cannot be verified, pause and check the route details before signing. A completed bridge transfer may be hard to reverse.

Should you choose ETH or WETH?

For most readers, the better choice is the asset the next app or action requires. If you need to pay fees or hold native ETH, choose a route that delivers native ETH. If a contract requires an ERC-20 token, WETH may be the useful form. Some routes can convert between them as part of the transfer, but check the output rather than relying on the route’s name.

Also compare the full amount you expect to receive. A route may involve a fee, a token conversion, or a different available output. These details affect how much arrives and what you can do with it next. Keep enough native currency on the destination network for fees if you plan to use the funds there.

Before you approve, match the destination network and token contract to your intended use. Then watch the route’s displayed output and any changes to the supported assets; those details determine whether you receive ETH for fees or WETH for an app that needs a token.