Gasless transactions: the fee moved, it did not disappear

Every included action on a public chain costs a validator something. "Gasless" means that cost is not coming out of your ether, or your Base ETH, in the transaction you personally broadcast. It can be paid by an app, deducted from a token, or bundled into a price you already accepted.

ERC-4337, "Account Abstraction Using Alt Mempool," is the specification people mean when they talk about this on Ethereum and on EVM networks that support it. Users send UserOperation objects to a separate mempool. Bundlers package those objects into a handleOps call on an EntryPoint contract, and that call is the transaction that lands in a block.

The EIP's motivation says abstracting gas payments allows a third party to pay, or the user to pay with tokens. That is the mechanism. It is not a statement that the fee is zero.

The cluster home is Crypto payments. Gas fees explained is the native-coin version of the same bill. Read both before you treat a "no gas" button as a discount.

A UserOperation carries calldata, gas fields, a nonce, and a signature. The EIP says the signature's meaning is defined by the smart-account implementation, not by the protocol. That is useful, and it is also the risk: you are trusting that account's validation code to do what the screen said.

A paymaster that sponsors you can also refuse you. Sponsorship can be limited to one app, one token, or one spending cap. If the paymaster stops, your "gasless" action stops, even though your keys still exist.

None of this removes a game fee, a spread, or a bad price. It only changes who transmits the chain fee.

If a site asks you to paste a seed phrase so it can "cover gas," that is not a paymaster. Stop. Wallet security checklist is the refusal list.

The terms say Bitcoin deposits and withdrawals use the Bitcoin network, and USDC and ETH deposits and withdrawals are supported on Base. Network fees for those transactions are separate from the game fee. The page does not offer a sponsored UserOperation as the deposit method.

So a deposit here is an ordinary transfer you pay to send, unless a future terms page says otherwise. Do not assume a gasless toggle that some other app advertises. Base versus Ethereum is the network distinction: the same-looking address on the wrong network does not arrive.

How it works is the game list. The chain fee and the game fee are different lines on purpose.

Who broadcasts the transaction, and which contract do they call? Which token, if any, is debited for the fee, and is that debit shown before you sign? Can the sponsor refuse the operation after you have approved something else? Does the screen ask for a seed phrase or a spending approval that outlives this one action?

Adults only. A missing gas prompt is not a reason to deposit money you need. Responsible gambling is the stop, including when the prompt looked free.

How to create a crypto wallet covers the key you should still control. A sponsored fee does not move custody of that key to the sponsor.