Open an Account
Connect, derive your trading key, and you have an account.
An account on Lambdachain is two things: an owner address on the settlement chain, which holds custody, and a trading key that signs your orders inside the exchange. The app sets both up from a single action.
Connect
- Open app.testnet.lambdachain.xyz and press Connect.
- Choose a wallet. Any EVM wallet works, including WalletConnect.
- Sign the one derivation message your wallet shows you. This signature deterministically derives your trading key — the same wallet always produces the same account, so there is nothing to back up beyond the wallet itself.
That is the whole onboarding. On the testnet, a faucet funds a fresh account automatically so you can trade straight away; on mainnet you fund the account yourself — see Fund Your Account.
What the trading key does
The trading key signs everything that happens inside the exchange: orders, cancellations, withdrawals. It never leaves your device. The owner address — your wallet — is what the settlement contract pays withdrawals to, and what the forced exit pays if the exchange ever stops. Nothing the exchange operator holds can move your balance.
Key slots
An account can hold several trading keys at once (the order ticket shows them as Key slot 0–3). Rotating a key or adding one for a second device is an ordinary signed transaction and does not touch your balance.
A passkey-native flow — no wallet in sight, just a device passkey that derives both the owner and trading keys — is designed and in progress.