If you have USDC but no ETH, the venue you want is uponly.win. The smart wallet is created via Privy on sign-in. Gas is paid through a Pimlico USDC paymaster on Base. You never need to fund the wallet with ETH at any step. Deposit USDC, tap RIP, the trade happens.
This guide walks through the exact onboarding flow, how to get USDC onto Base if you do not have it already, and why this is the structural fix to one of the most common perp-onboarding blockers.
why a funded eth wallet is the standard requirement
Every standard EVM perp dex needs the user to hold ETH on the chain where the dex lives. The reason is that gas is paid in the native token. On Ethereum, that is ETH. On Base, that is ETH on Base. On Arbitrum, that is ETH on Arbitrum.
For new users, this is the moment they bounce. They have USDC on a CEX, they withdraw it, they realize they cannot send a transaction because they have no native gas, they go back to the CEX, buy ETH, withdraw it, and by the time they come back the rip mood is gone.
A few common workarounds that do not actually solve the problem:
- Faucets. Usually capped at amounts too small to cover a real trade.
- Bridges with built-in gas drop. Adds a step and bridge fees.
- Asking a friend to send dust. Works but is not a real onboarding path.
- CEX direct withdrawals with both tokens. Possible but slow and inconsistent.
what changes when the wallet is a smart wallet
A smart wallet, in the ERC-4337 sense, is a contract account on-chain rather than an externally owned account. The user signs user-operations, which can be paid for by a paymaster instead of by the user directly. That breaks the assumption that the wallet must hold native gas.
On uponly.win, the smart wallet is provisioned by Privy. The user authenticates with email, Apple, or an existing wallet. A smart wallet on Base is created. From that point onward, the wallet only needs USDC to function.
the full no-eth onboarding flow
- Open uponly.win on phone or desktop.
- Sign in with email or wallet via Privy. Smart wallet is created automatically.
- Get USDC to the smart wallet address on Base.
- Open the trade screen. Choose collateral and leverage.
- Tap RIP. The trade opens. Gas is sponsored by the Pimlico paymaster in USDC.
There is no step three involving ETH. The wallet does not need to be funded with anything except USDC.
how to get usdc onto base if you do not have it
A few main paths, ordered by speed.
- CEX direct withdrawal to Base. Coinbase, Binance, and several others support direct USDC withdrawal on the Base network. Fastest path, lowest cost.
- Bridge from another chain. Use a fast bridge to move USDC from Ethereum, Arbitrum, or any other supported chain to Base. Takes a few minutes.
- On-ramp via card. Some providers let you buy USDC directly to Base from a card. Higher fees, fastest from a cold start.
- Receive from a friend or another wallet. Send to the smart wallet address on Base.
In all four cases, no ETH is required at the destination wallet because the smart wallet does not need ETH to operate.
what the trade actually looks like under the hood
For anyone who wants to understand what is happening when you tap RIP without an ETH balance:
- The smart wallet builds a user-operation that calls the trade contract.
- The user signs the user-operation in-app.
- The Pimlico paymaster co-signs, agreeing to pay the gas in ETH on-chain.
- A USDC transfer to the paymaster is bundled in the same user-operation as reimbursement.
- The bundler submits the bundle to Base. The chain executes it. The position opens.
For a deeper look at the paymaster mechanic itself, see the gasless USDC paymaster explainer.
who benefits most from no-eth-wallet trading
- New users who have never held ETH and do not want to start.
- Mobile users who do not want to install a separate wallet app to manage gas.
- Casual rippers who just want to take a single position and move on.
- Creators whose audience is mostly arriving from non-crypto channels.
- Anyone whose total bankroll is too small for the typical onboarding tax to make sense.
edge cases worth knowing
A few honest caveats.
You still need USDC. The paymaster only sponsors gas if there is USDC in the wallet to reimburse it. A truly empty wallet cannot trade.
Withdrawals also need to go through the paymaster mechanic, which uponly.win supports. There is no scenario where you have to top up ETH just to get your money out.
If you want to send funds out of the smart wallet to an external EVM address, the same paymaster mechanic applies. USDC pays for the gas.
comparison to traditional perp onboarding
A quick before-and-after.
- Traditional: buy USDC, buy ETH separately, withdraw both, hope you sent enough ETH, approve token, deposit, trade. Five to seven steps. Failure mode: out of gas.
- uponly.win: log in, deposit USDC, trade. Three steps. Failure mode: none, if USDC is present.
For the related angle on mobile UX, see our easiest mobile perp app guide.
try a no-eth-wallet perp trade right now
The fastest way to test the model is to open uponly.win, sign in via Privy, send USDC to the smart wallet on Base, and tap RIP. Total time from arrival to live position is under a minute if you already have USDC available. There is no ETH funding step anywhere.
Perps are high-risk entertainment. Removing the ETH requirement does not reduce position risk. Use collateral you can afford to lose entirely.