RFQ Gasless on RAVN: 0x Gasless, Bebop, and CoW
Same-chain EVM is where firm RFQ shines. RAVN races 0x Gasless, Bebop, and CoW for gasless, zero-slippage-style fills, with Relay as the safety net when RFQ cannot serve the pair.
Quick answer
On EVM same-chain swaps, RAVN prefers professional market-maker RFQ venues when they can serve the chain and tokens:
- 0x Gasless for ERC-20 sells on supported chains
- Bebop for RFQ when registered and eligible
- CoW Protocol for batch auction and RFQ, including native-token sells on CoW chains
Winning RFQ paths are usually SIGNATURE: you sign typed data off-chain; a solver submits and covers swap gas. Price is firm (zero slippage on that model). Relay stays in the race as fallback.
Who can sell what
| Venue | Same-chain role | Native coin sell |
|---|---|---|
| 0x Gasless | ERC-20 to ERC-20 gasless RFQ on its chain list | No (permit-style ERC-20 in) |
| Bebop | RFQ market maker when eligible | No (ERC-20 style constraints apply) |
| CoW | Batch auction and RFQ on CoW chains | Yes on supported CoW chains |
| Relay | Fallback for any pair RFQ cannot cover | Yes where Relay supports the chain |
That is why native ETH sells on a CoW chain can still be gasless-class via CoW, while native sells on chains only Relay covers use Relay and normal network gas.
0x Gasless chains (RAVN list)
0x Gasless is limited to chains where gasless is actually live in 0x's API. RAVN's list includes Ethereum, Polygon, Arbitrum, Base, BNB, Optimism, Avalanche, Unichain, World Chain, HyperEVM, and Monad. Linea is intentionally omitted from 0x Gasless here (CoW covers Linea). zkSync and Robinhood are not 0x Gasless chains in this integration.
Quotes are short-lived (on the order of ~30s binding). Re-quote if you wait.
CoW chains
CoW runs on Ethereum, Arbitrum, Base, Polygon, Linea, and Avalanche in RAVN's detector. It does not run on BNB or Optimism in this integration. CoW is the gasless-class venue that can sell native tokens same-chain where it is live.
Gasless preference is not a free win
The SOR prefers gasless RFQ when the quote still beats the rival's guaranteed floor after slippage. A gasless quote that is far worse on net value loses. See the best execution guide for the floor math.
What you sign
- SIGRFQ winners: typed data / order signature; RAVN submits.
- TXRelay fallback: sign and broadcast a transaction.
Try it in the app
Live in beta. Parallel venues, best execution, canonical assets. RAVN never holds your funds.
FAQ
Is every RAVN swap gasless?
No. Gasless applies on eligible RFQ same-chain EVM routes. Deposit and on-chain routes use standard network gas. RAVN adds no gas markup.
Is every RAVN swap zero slippage?
No. Firm RFQ quotes are zero slippage on that model. On-chain and deposit venues are not blanket zero slippage.
Why did I get Relay instead of 0x?
Chain unsupported for gasless, native sell token 0x cannot take, no RFQ liquidity, or Relay won on best execution.
Do I need ETH for gas on 0x Gasless?
On gasless RFQ fills the solver covers swap gas. You still need a wallet that can sign. Approvals and edge cases can differ by token.
