.SINGAPORE, JUNE 3 – Spark, an Onchain Capital Allocator focused on providing innovative savings returns and competitive stablecoin yields, today announced its expansion to Optimism’s OP Mainnet and Uniswap’s L2 network, Unichain, introducing savings yields for USDC and USDS through the Spark Liquidity Layer.
The expansion represents a strategic step in Spark’s mission to build composable, capital-efficient infrastructure for Ethereum’s evolving Superchain ecosystem. By extending its product suite to leading Layer-2 networks, Spark aims to enable seamless interoperability, reduce capital fragmentation, and deliver sustainable yield and seamless cross-chain liquidity.
Spark’s Savings Vault will issue two new yield-bearing stablecoins backed by deposits of sUSDC and sUSDS, respectively. These tokens offer a 4.5% APY via the current Sky Savings Rate, accruing yield and serving as productive collateral across DeFi protocols like Euler. Designed for composability, they require no staking, wrapping, or fee-based redemption mechanisms, benefiting users with improved yield exposure cross-chain without slippage or manual coordination.
“We’re entering a phase where yield, liquidity, and application logic must move fluidly across ecosystems. Unichain, as a DeFi-optimized Layer-2 hub, is the ideal foundation for bootstrapping a cross-chain liquidity layer, where assets and yield can flow frictionlessly between interconnected chains. Spark received 2 million OP from the Optimism Grants Council during Season 7, supporting ecosystem incentives and Superchain native interoperability,” said Sam MacPherson, CEO and Co-Founder of Phoenix Labs.
“The Superchain is the home for DeFi, and Spark helps accelerate that vision by unlocking new levels of capital efficiency for the ecosystem. With the Spark Liquidity Layer now live on OP Mainnet and Unichain, we’re a step closer to our vision for a unified, composable DeFi system across the Superchain,” said Adoni Ioannou, Business Development & Strategy Lead at Optimism.
As part of this rollout, Spark is also working with OP Labs to integrate native cross-chain interoperability, including single-block messaging and mint/burn mechanics for sUSDC and sUSDS. This will allow applications and users to access Spark’s yield and liquidity from any Superchain L2 without reliance on traditional bridging or fragmentation. This marks the latest milestone in Spark’s efforts to create interoperable, programmatic infrastructure for decentralized finance at scale.
