vertex

Install the vertex-protocol package, create a client with create_vertex_client and your private key, then build an OrderParams with priceX18 via to_x18(), a signed amount, an expiration from get_expiration_timestamp(), and a nonce from gen_order_nonce(). Submit it with client.market.place_order.

Product ID 0 is USDC, the quote asset. Odd IDs are spot markets (1=wBTC, 3=wETH) and even IDs are perpetuals (2=BTC-PERP, 4=ETH-PERP). Availability varies by chain, so query all_products on the target gateway before trading.

Vertex Edge unifies orderbook liquidity across Arbitrum, Base, Mantle, Sei, Blast, and Sonic. Orders match cross-chain at the sequencer level and settle on each user's origin chain, with separate gateway endpoints per chain.

Invalid nonce occurs when using sequential integers instead of the timestamp-based gen_order_nonce(). Invalid signature usually means the private key mismatches the subaccount owner, the wrong chain ID is used, or the sender bytes32 was not built with subaccount_to_bytes32().

Lending and borrowing are implicit with no separate actions. Any positive spot balance automatically earns deposit interest, while a negative spot balance from selling unheld assets incurs the borrow rate, all within one cross-margin health calculation.

Connect to the subscriptions WebSocket endpoint at /v1/subscribe and send subscribe messages with stream types like best_bid_offer, trade, book_depth, fill, position_change, or order_update. Authenticated streams require your subaccount as a bytes32 hex string.