Start with the network and asset
ETH is the native asset of Ethereum, while other networks may use their own native gas assets and wrapped representations. A cross-chain route therefore needs to distinguish the source ETH from the destination asset.

What to verify when moving ETH across blockchain networks.
ETH is the native asset of Ethereum, while other networks may use their own native gas assets and wrapped representations. A cross-chain route therefore needs to distinguish the source ETH from the destination asset.
Check whether the destination route delivers native ETH, a wrapped representation, or another asset. Also verify that you have enough source-chain gas to authorize and submit the transaction.
Fees can include source gas, routing costs and differences in exchange rates or liquidity. The quoted output is more useful than comparing a single fee number in isolation.
Review the destination network carefully before signing. For a common example, the Ethereum-to-Base bridge route lets you inspect the current route rather than relying on a static estimate.