Technical FAQ

Should I use the API versus App SDK to integrate Across?

We recommend using the App SDK for the easiest way to integrate Across into your dApp.

What is the behavior of ETH / WETH in transfers?

Depending on the context, Across will sometimes send a user ETH and sometimes send a user WETH.

• If the input asset is ETH, and the recipient is an EOA, the EOA will receive ETH

• If the input asset is ETH, and the recipient is a contract, the contract will receive WETH (not ETH)

• If the input asset is WETH, and the recipient is an EOA, the EOA will receive ETH (not WETH)

• If the input asset is WETH, and the recipient is a contract, the contract will receive WETH

How do I deposit using ETH instead of WETH?

To deposit ETH, or the native token for a network, set msg.value = inputAmount. To deposit WETH, set msg.value = 0. When depositing ETH or WETH, the inputAmount should be the same and the inputToken should be the WETH address for the current chain.