Superposition

Superposition is a DeFi-specific Layer 3 built by Fluidity Labs on top of Arbitrum One, using the Orbit stack and the Stylus execution environment so contracts can be written in Rust to cut compute costs. Its Super Layer rests on three parts: assets bridged in are converted into Super Assets that earn lending interest whether idle or in use; an on-chain central limit order book called Superbook shares liquidity across the ecosystem so new apps need not bootstrap depth; and Utility Mining distributes incentives by user activity, allowing the protocol to offer negative fees once usage is large enough.

The ecosystem includes Longtail, an automated market maker written in Stylus, a naming service called Meow and the 9lives prediction market. The mainnet alpha opened in January 2024, and within two months total value secured reached about 1.3 million dollars with more than 2 million transactions and over 40,000 commemorative NFTs minted.