Questions
Plain answers to the things people ask first.
What is Lambdachain?
A perpetual futures exchange built as a zero-knowledge rollup on STRATO. You trade 50+ markets from one cross-margined account, your deposits earn yield while they sit there, and every trade is proven correct before it settles.
Is it self-custodial?
Yes. Your account is controlled by your key. Deposits sit in escrow contracts, not with the exchange, and withdrawals are authorised by you. If the exchange ever stopped operating, a proof of your balance is enough to withdraw directly from the settlement contract. See Forced Exit.
What are the fees?
2 bps maker, 5 bps taker. Funding is exchanged between traders every hour and the exchange keeps none of it. See Fees.
What is USDλ?
The exchange dollar, backed one-for-one by USDC held in escrow. sUSDλ is its savings form for holders outside the exchange. See USDλ.
Where does the yield come from?
Interest earned on the escrowed USDC, distributed to depositors and sUSDλ holders in proportion to what they hold, with shares for the insurance fund and provers. Only realised interest is distributed. The ~5% figure is an estimate and is not guaranteed. See Where the Yield Comes From.
How do I fund an account?
Card or Apple Pay, USDC from Ethereum, Base or Linea, or a swap from any token you hold. See Fund Your Account.
What does "proven" mean?
Every block of trades comes with a zero-knowledge proof that the rules were followed — fills at best-of-book, correct margin and funding, liquidations only where the rule allowed. The settlement contract verifies the proof before balances become final. See Proofs and Provers.
What does testnet mean?
The exchange is live on the STRATO testnet with play money, so you can try the real flow without real funds at risk. Mainnet is next.