A 0.5% slippage limit can be the difference between a normal trade and an unexpectedly expensive one. That is the catch with an Arbitrum swap: the hard part is rarely pressing “swap.” It is knowing which network, token contract, and transaction settings you are actually approving.
Arbitrum is an Ethereum layer-2 network, so swaps happen in a different environment from Ethereum mainnet even when the assets have familiar names. Your wallet must be connected to Arbitrum One, and you need a small amount of ETH on that network to pay gas. ETH sitting on Ethereum mainnet will not automatically pay for an Arbitrum transaction.
The safest path starts before you choose a token. Confirm the network in your wallet, then check the token’s contract address from a source you already trust. “USDC” or “ARB” is only a label; a malicious token can use the same symbol. If you are moving funds from another network, bridge them first and wait until the balance appears on Arbitrum.
What to check before confirming
Enter the amount, then inspect the quoted output, price impact, slippage, and minimum received. Slippage is your tolerance for the final execution price changing while the transaction is processed. A very tight setting may cause a legitimate trade to fail; a wide setting can let you receive materially less than expected. For an unfamiliar or thinly traded token, start with a small test amount.
Read the wallet prompt rather than approving it automatically. A token approval gives a contract permission to spend that token from your wallet, usually up to a stated amount. Unlimited approval is convenient, but a smaller allowance reduces what can be taken if the contract or website later becomes unsafe. After the swap, revoke allowances you no longer need using a reputable wallet or token-approval tool.
Also check the recipient and transaction details, especially if a site opens a second approval window. A swap that asks you to transfer funds directly to an unknown address is not the same as a normal contract interaction. Never paste a seed phrase or private key into a swap page.
Where the swap happens
Once the wallet is on Arbitrum, the asset is verified, and the quoted minimum is acceptable, the remaining step is to use the interface that executes the trade: arbitrum swap. Treat the page as the place to carry out the transaction, not as a reason to skip the checks above.
That small routine—network, contract, gas, slippage, approval—answers the real question. You are not merely asking whether a swap can be made; you are checking exactly what your wallet is being asked to authorize.