Destination gas is the native token a network uses to pay for transactions after a cross-chain swap. Before you send, check whether the swap supplies that token or whether you must already have some in your wallet.
A cross-chain service can arrange the source-chain transfer and destination-chain swap in one flow. For example, Biswap cross-chain swap moves and swaps assets across networks; check what you will hold at the destination before relying on it for another transaction. In some flows, a relayer submits the destination transaction and covers its network fee. In others, you need the destination network’s fee token to spend or move your received assets.
Why Can the Swap Finish Before You Can Spend?
Your swapped tokens and the fee token are separate balances. Receiving USDC on Arbitrum, for example, does not give you the ETH that Arbitrum typically uses for transaction fees. You may see the tokens in your wallet but be unable to send them until you have some ETH there.
Fees also depend on the network and the action. Ethereum fees rise and fall with demand; Ethereum.org explains that they include a base fee and, often, a tip. Solana charges transaction fees in SOL, according to Solana’s fee documentation. A swap or token transfer can cost more than a simple wallet transfer because it requires more network work.
Three Checks Before You Send
Make these three checks before confirming the source-chain transaction.
- Find the destination fee token. Check the network name and the token used for its fees. Arbitrum commonly uses ETH, BNB Chain uses BNB, and Solana uses SOL. The same token symbol can exist on several networks, so make sure any fee token you already hold is on the destination network.
- Ask who pays the arrival fee. Read the swap’s quoted outcome and any fee explanation. Does the service say the destination transaction fee is covered, or will your wallet need a fee balance? If that is unclear, assume you may need the network’s native token for your next transaction.
- Keep enough for the next action. If you plan to send or swap the received asset again, leave a small fee balance in the destination network’s native token. There is no universal safe amount: fees change with network demand and transaction complexity. Use the wallet’s estimate for that action, and allow for another attempt if the first transaction fails.
Questions New Users Ask
Can I pay a network fee with the token I just received?
Usually, no. The network requires its own fee token unless the transaction flow specifically supports sponsored fees or fee payment in another token. For example, holding a stablecoin on Solana does not by itself pay the SOL transaction fee. Check the wallet’s transaction estimate and fee details before you try to move the stablecoin.
What if I have no fee token on the destination network?
You may need to obtain a small amount of the network’s native token before you can send or swap your received assets. That could mean using a separate funding route or asking someone to send the fee token to your wallet on that network. Check the network carefully: tokens sent on the wrong chain may not be usable for fees.
Decision rule: Send only when you know which destination token pays the next fee and how your wallet will get it.