dreamDEX opens BTC and ETH event contracts on Somnia, settled in USDso

In Brief:

• dreamDEX has opened Event Contracts to all users, letting traders call BTC or ETH up or down over 15-minute or one-hour windows for a fixed payout.
• The contracts carry no maker or taker fees, settle onchain in USDso and cap losses at the stake, with no liquidations.
• It’s the first product dreamDEX has shipped beyond its spot order book on Somnia, which launched with perpetual futures still on the roadmap.

dreamDEX has opened its Event Contracts to all users, adding binary up-or-down markets on BTC and ETH to the zero fee order book it runs on Somnia.

“Event Contracts are Live for everyone,” the exchange said in a post announcing the rollout.

Traders pick an asset, pick a window and call the direction. Settlement is in USDso, the USD-pegged stablecoin that serves as dreamDEX’s quote asset. The markets are live at app.dreamdex.io/event-contracts.

How the contracts work

The available windows are 15 minutes and one hour. Payouts are fixed, so a correct call returns the same amount regardless of how far price moves. Maximum loss is the stake.

There are no liquidations and no margin mechanics, which puts the product closer to a binary option than to the perpetual futures dreamDEX has said it plans to launch. The team said shorter timeframes are coming.

“Everyone has a view on the market’s direction. Now you can trade it,” dreamDEX said.

The markets went live earlier in August, opening first with the BTC and ETH windows.

Where USDso fits

USDso is backed 1:1 by FraxUSD and bridged through LayerZero. Deposits of other stablecoins into dreamDEX convert to USDso automatically, at no cost to the depositor.

That conversion step matters for short-dated contracts, where a 15-minute window leaves no room for a manual swap before expiry.

The zero fee model behind it

dreamDEX charges nothing on either side of a trade, and the Event Contracts inherit that. The exchange funds the model through what it calls a Yield-Based CLOB, distributing stablecoin yield to market makers based on how close their quotes sit to the mid rather than paying conventional maker rebates.

The reasoning the team has given is that fees distort market structure, since makers widen spreads to cover fee drag and everyone gets worse fills.

Orders are matched and cleared onchain with validator-level settlement. There’s no centralized matching engine or sequencer sitting in the execution path, which is the design dreamDEX has used since spot markets opened.

Somnia’s native reactivity precompile lets contracts respond to fills, price moves and order book events deterministically onchain without external polling. Short-duration contracts that expire on a 15-minute clock depend on that: the settlement trigger has to fire without an off-chain keeper.

Background

dreamDEX opened applications for its Founding Trader program on May 21, announced from London, ahead of the exchange’s launch on Somnia. Spot came first. Perpetual futures, fair order sequencing, MEV resistance, transaction-level privacy primitives, yield-bearing collateral and sub-10ms matching are all on the roadmap.

The exchange launched with REST and WebSocket APIs, CCXT-compatible infrastructure, MCP support and native AGENTS.md and SKILL.md integrations, aimed at bots and algorithmic systems as much as at people clicking buttons.

Hacken audited the contracts in a review dated May 20, covering the Somnia spot DEX and reporting branch code coverage of 81.94%.

The Event Contracts are a departure from that institutional pitch. dreamDEX built an order book for market makers and trading firms, then shipped a product where the only inputs are an asset, a clock and a direction.

“USDso was built to remove friction, not add it,” Somnia said in a post about the stablecoin. “Deposit stables into dreamDEX and the conversion happens automatically in the background. Zero fees. Nothing to think about.”