Get the extension What is a gas fee?
A gas fee, or network fee, is what you pay the network's validators to include your transaction. It is paid in the chain's own coin (ETH on Ethereum, SOL on Solana, TRX on Tron) and depends on how much work the transaction needs and how busy the network is.
Why it matters
Without enough of the native coin you cannot move anything, not even a stablecoin. A fee set too low can leave a transaction pending; one set carelessly high wastes money.
How Locker Protocol Wallet handles it
Before preparing a send or a swap, Locker Protocol Wallet checks that you hold enough of the asset and enough native coin for the fee, and tells you when you do not. A pending EVM transaction can be sped up or cancelled with a replacement signed on the Vault.
Questions
Why do I need ETH to send USDC?
Because the network is paid in its own coin. The token you send and the coin that pays the fee are two different balances.
Does Locker Protocol Wallet add a fee on sends?
No. A send costs only the network fee. The wallet's own fee applies to swaps and bridges made in the extension (at most 0.25%), and it is shown before you sign.