1. Authorize once
Your custody (HSM, KMS or MPC) signs an EIP-7702 authorization for each deposit address. The key never leaves it.
Gasless sweeps for your deposit addresses
Your deposit addresses stay plain EOAs under your custody. Authorize each one once with EIP-7702, and sweep tokens to your hot wallet in batches, without sending them gas.
How it works
Section titled “How it works”2. Request sweeps
Send sweep requests to the API. Portuna Sweep batches them and pays the gas from your prepaid gas wallet.
3. Get the funds
Tokens land in your hot wallet, and a signed webhook tells your backend each outcome.
You pay per successful sweep: its gas plus a fee, and the fee never makes a sweep cost more than the classic way of funding the address with gas and transferring from it. See Fees and tariffs.
Start here
Section titled “Start here”QuickstartFrom an API key to your first gasless sweep on Sepolia.
How it worksEIP-7702, the delegate, the batcher, your gas wallet and hot wallet.
Signing authorizationsSign in an HSM, KMS or MPC, with a test vector to check your code.
WebhooksEvents, retries and signature verification in Go, TypeScript and Python.
SDKsGo and TypeScript: API client, authorizations, webhooks, delegate checks.
Security modelWhat an authorization allows, and what you can verify yourself.