Somnia Markets

Somnia Markets runs order books as smart contracts on Somnia. Spot, perpetual and binary event markets share one matching engine, one settlement path and one indexer.

Product	Status	What it is
Spot	Live	Central limit order books for tokens and RWAs
Perpetual Futures	Testnet	Perpetuals on crypto and RWAs, with onchain funding
Binary Event Contracts	Live	Yes/no contracts resolved by the Somnia Oracle
Liquidity Vaults	Coming soon

To build on the markets, use the Markets SDK. As the Somnia Explorer's Markets section lists them:

Product	Status	What it is
Somnia Venues	Live	Your markets under your brand, on the shared books
Somnia Markets	Live	The contracts, the SDK and the indexer behind every market
Somnia Analysis	Live	The liquidity behind every book, and the risk each venue carries

From order to settlement

Each step is a contract call or an onchain event.

1. Deposit. A trader funds an account, which can use session keys to trade without a wallet prompt per order.
2. Place an order. The order is sent to the market contract, from a venue front end or directly from code.
3. Match. The matching engine contract pairs orders by price-time priority, with deterministic ordering inside the block.
4. Settle. Balances move in the same state transition as the match. A fill is either complete or it didn't happen.
5. Index. The shared markets indexer records fills, order changes and candles, and serves them to venues and API clients over GraphQL.

Fees

Somnia Markets charges no protocol fee. Traders pay network gas, and venues can charge their own fees:

• Event markets. Each venue sets its own fee parameters and fee recipient, and a market keeps the fee it was created with.
• Spot markets. A venue earns a builder fee on an order it routes when the order carries its builder attribution, the trader has approved it as a builder, and the pool's fee cap allows it.

See Somnia Venues for how to set this up.