Post a quote, take it with a sealed bid. Settlement reveals only the winner and the clearing price — every losing bid stays hidden, every outcome proven on Stellar.
A maker posts a request for quote — pair, size band, price range and a deadline — stored in the Soroban contract.
Takers commit Poseidon(bid, nonce, addr). A range proof shows min ≤ bid ≤ max — invalid bids die on arrival, the amount never leaks.
One proof reveals only the winner and the clearing price. The second-highest bid sets the price (Vickrey), computed entirely in-circuit; losing bids never appear.
Grab testnet USDC from the faucet, post an RFQ and settle with a zero-knowledge proof in minutes.